(19)
(11)EP 3 017 228 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.04.2020 Bulletin 2020/18

(21)Application number: 14734187.9

(22)Date of filing:  02.07.2014
(51)International Patent Classification (IPC): 
F16L 27/087(2006.01)
(86)International application number:
PCT/EP2014/064089
(87)International publication number:
WO 2015/000973 (08.01.2015 Gazette  2015/01)

(54)

TOROIDAL FLUID SWIVEL FOR HIGH PRESSURE APPLICATIONS

TORUSFÖRMIGE FLÜSSIGKEITSDREHVERBINDUNG FÜR HOCHDRUCKANWENDUNGEN

RACCORD PIVOTANT TOROÏDAL À FLUIDE POUR APPLICATIONS À HAUTE PRESSION


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 04.07.2013 EP 13175108

(43)Date of publication of application:
11.05.2016 Bulletin 2016/19

(73)Proprietor: Single Buoy Moorings, Inc.
1723 Marly (CH)

(72)Inventor:
  • RANDRIANARIVONY, Liva, Christian
    F-06360 Eze Bord de Mer (FR)

(74)Representative: Nederlandsch Octrooibureau 
P.O. Box 29720
2502 LS The Hague
2502 LS The Hague (NL)


(56)References cited: : 
EP-A1- 0 213 661
WO-A1-90/02289
WO-A2-98/41792
EP-A1- 2 360 089
WO-A1-2007/048791
US-A- 5 312 140
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to a toroidal fluid swivel. Also, the invention relates to a method for manufacturing such a toroidal fluid swivel.

    Prior art



    [0002] Toroidal fluid swivels are known in the art for transfer of high-pressure fluids across a rotary interface between an incoming fluid line and an outgoing product piping. Applications for such a swivel include for example offshore oil and gas explorations where high-pressure flows of oil and/or gas are transferred from a (deep-sea) offshore well to a floating vessel. Typically such a floating vessel is equipped with a turret mooring system that can couple a mooring buoy that holds one or more riser lines from the well, to product piping ducts on the vessel. Since the turret mooring system should allow some rotation between the vessel and the buoy, the swivel is likewise adapted to provide rotation between the incoming fluid line and the product piping.

    [0003] In particular for deep-sea applications there is a need for swivels that can withstand design pressures well over 500 atm for incoming fluid while at the same time, a high flow of the fluid should be transferred.

    [0004] It is known that to obtain high strength properties for steel workpieces a thickness limitation of steel forgings or castings is present that affects the fabrication of large diameter high-pressure vessels.

    [0005] The currently known thickness limit for steel workpieces is about 350 mm. The necessary mechanical properties cannot be met when the thickness exceed this critical value. The main reason is the impossibility to achieve adequate heat treatment at the core of the workpiece. Moreover for forgings, strain hardening cannot be properly obtained at the core when the forging is too thick.

    [0006] However, very high wall thickness is necessary to handle very high pressure and large diameter. The current known limits are approximately a diameter of 2.4 m and a design pressure of 5,000 psi (345 atm) or 2.8 m and a design pressure of 3,500 psi (241 atm). Production of larger high-pressure vessels with higher design pressures by using larger steel workpieces is not well feasible.

    [0007] In fact, the only known technique, to some extent, is to use very high strength materials (for example exotic steel alloys at relatively high cost) at the expense of limitations in terms of toughness, corrosion resistance, other manufacturing issues and, of course, limited wall thickness. Currently the forging/casting thickness limitation is a showstopper for large diameter vessels and high-pressure applications. Documents US 5 312 140 and EP 2 360 089 disclose known fluid swivel structures.

    [0008] It is an object of the present invention to overcome these disadvantages from the prior art.

    Summary of the invention



    [0009] The object is achieved by providing a fluid swivel according to claim 1, for allowing transfer of a fluid across a rotary interface in a swivel rotational central plane between an incoming fluid line and an outgoing product piping; the swivel comprising an inner annular element and an outer annular element, that are located with their adjacent cylindrical surfaces in a close proximity, the inner annular element and the outer annular element defining in the swivel rotational central plane a chamber between the adjacent cylindrical surfaces of the inner and outer annular elements for receiving the fluid, wherein the inner annular element of the swivel is arranged with a connecting conduit to be connected to an end of the incoming fluid line which extends through said element to the chamber for supply of the fluid to the chamber, and wherein the outer annular element of the swivel is arranged to be connected to the outgoing product piping and is provided with a primary duct for transport of the fluid from the chamber to the product piping, wherein the swivel comprises a primary outer reinforcing annular wall arranged adjacent to the outer peripheral wall of the outer annular element, the primary outer reinforcing annular wall being arranged with two peripheral centering surface portions for contacting and/or registering with the outer peripheral wall of the outer annular element, the primary outer reinforcing annular wall further being arranged with at least a first central peripheral opening extending along a portion of the periphery of the outer reinforcing annular wall for allowing the primary duct to pass through there.

    [0010] Thus, the swivel is designed to maintain the forging thickness/casting well below 350 mm and to use several layers to achieve the required wall thickness. However, mechanical links must be ensured between the outer annular element and the outer reinforcing wall. In fact, the radial expansion of the outer annular element must be partly and mechanically transferred to the outer reinforcing wall and so on, for a pressure vessel under internal pressure. Due to the large radial deflections of such large diameter parts, the mechanical coupling between consecutive layers can be obtained by means of centering surface portions or centering registers such as a centering collar or a centering shoulder, while a positive play is applied. Indeed, standard machining tolerances are good enough to limit the effect of varying centering register plays. In fact, the radial deflection due to external pressure of the annular element would be about a couple of millimeter, whereas the radial play can be easily set within couple of tenths of millimeter - i.e., the centering registers are likely to close quickly thereby mitigating the non-linear effect of an open initial gap.

    [0011] Alternatively, the radial shrinkage of the outermost layer must be partly and mechanically transferred to the next layer and so on for pressure vessel under external pressure.

    [0012] In an aspect the invention provides that the peripheral centering surface portions are arranged as a recessed rim with an upper and lower inward edge, arranged to receive the outer peripheral wall of the outer annular element in between the inward edges with an upper edge of the outer peripheral wall fitting the upper inward edge and a lower edge of the outer peripheral wall fitting the lower inward edge. Such a construction provides a stable position of the outer reinforcing annular wall with respect to the outer annular element of the vessel.

    [0013] In an aspect the invention provides that the primary outer reinforcing annular wall further being arranged with one or more additional central peripheral openings extending along a portion of the periphery of the outer reinforcing annular wall for allowing a secondary duct or a port to pass through.

    [0014] In an aspect the invention provides that the primary outer reinforcing annular wall comprises an upper outer reinforcing annular wall portion and a lower outer reinforcing annular wall portion wherein the upper and lower portions are coupled to each other by mechanical joints.

    [0015] By enclosing the outer annular wall between an outer reinforcing annular wall portion and a lower outer reinforcing annular wall portion and joining the two portions mechanically a vessel with large diameter can be constructed in a relatively simple manner. By using an outer reinforcing annular wall portion and a lower outer reinforcing annular wall portion instead of a single outer reinforcing annular wall, the weights to be moved during construction are relatively low.

    [0016] In an aspect the invention provides that the swivel comprises a primary inner reinforcing annular wall arranged adjacent to the inner peripheral wall of the inner annular element, the primary inner reinforcing annular wall being arranged with two peripheral centering surface portions for contacting and/or registering with the inner peripheral wall of the inner annular element,

    [0017] In an aspect of the invention the primary inner reinforcing annular wall further being arranged with a first central peripheral opening along a portion of the periphery of the inner reinforcing annular wall for allowing the connecting conduit to pass through there.

    [0018] In a similar manner as for the outer reinforcing annular wall, an inner reinforcing annular wall can be used within the swivel to reinforce the chamber.

    [0019] In an aspect the invention provides that additionally the swivel comprises an upper inner sealing ring, an upper outer sealing ring, a lower inner sealing ring and a lower outer sealing ring; the upper inner sealing ring being mounted on the inner annular element above the swivel rotational central plane; the upper outer sealing ring being mounted on the outer annular element above the swivel rotational central plane with its inner peripheral surface in close proximity with the outer peripheral surface of the upper inner sealing ring; the lower inner sealing ring being mounted on the inner annular element below the swivel rotational central plane; the lower outer sealing ring being mounted on the outer annular element below the swivel rotational central plane with its inner peripheral surface in close proximity with the outer peripheral surface of the lower inner sealing ring; wherein the swivel comprises a secondary outer upper reinforcing ring, a secondary outer lower reinforcing ring, a secondary inner upper reinforcing ring and a secondary inner lower reinforcing ring, wherein the secondary outer upper reinforcing ring is arranged above the swivel rotational central plane and comprises at an inner peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the outer peripheral wall of the upper outer sealing ring; the secondary outer lower reinforcing ring is arranged below the swivel rotational central plane and comprises at an inner peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the outer peripheral wall of the lower outer sealing ring; the secondary inner upper reinforcing ring is arranged above the swivel rotational central plane and comprises at an outer peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the inner peripheral wall of the upper inner sealing ring, and the secondary inner lower reinforcing ring is arranged below the swivel rotational central plane and comprises at an outer peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the inner peripheral wall of the lower inner sealing ring.

    [0020] In case the swivel is equipped with sealing rings around the outer and inner annular walls, the sealing rings can be reinforced in a similar manner as the inner and outer annular wall by means of secondary reinforcing rings both at the exterior and interior parts, and the upper and lower side of the swivel.

    [0021] In an aspect the invention provides that the swivel comprises an outer upper spacer ring, an outer lower spacer ring, an inner upper spacer ring and an inner lower spacer ring; each spacer ring having an inner centering surface portion at its inner peripheral edge and an outer centering surface portion at its outer peripheral edge; the outer upper spacer ring being intermediate the primary outer reinforcing annular wall and the outer annular element and between the secondary outer upper reinforcing ring and the swivel rotational central plane; the outer lower spacer ring being intermediate the primary outer reinforcing annular wall and the outer annular element and between the secondary outer lower reinforcing ring and the swivel rotational central plane; the inner upper spacer ring being intermediate the primary inner reinforcing annular wall and the inner annular element and between the secondary inner upper reinforcing ring and the swivel rotational central plane; and the inner lower spacer ring being intermediate the primary inner reinforcing annular wall and the inner annular element and between the secondary inner lower reinforcing ring and the swivel rotational central plane.

    [0022] In this embodiment the spacer rings allow to position the outer reinforcing annular wall and inner reinforcing annular wall at a relatively larger radial distance from the outer annular wall than the sealing rings to allow a relatively simpler method of construction and also to allow a relatively simpler shape of both the sealing rings and the reinforcing annular walls.

    [0023] Alternatively, the spacer rings can be arranged to locate the sealing rings at a larger radial distance from the outer annular wall than the reinforcing annular walls.

    [0024] The present invention also relates to a method for manufacturing a toroidal fluid swivel as defined in claim 14.

    [0025] Advantageous embodiments are further defined by the dependent claims.

    Brief description of drawings



    [0026] The invention will be explained in more detail below with reference to drawings in which illustrative embodiments are shown. It will be appreciated by the person skilled in the art that other alternative and equivalent embodiments can be conceived and reduced to practice without departing from the true spirit of the invention, the scope of the invention being limited only by the claims.

    Figure 1 shows a first perspective view of a sector of a swivel outer part;

    Figure 2 shows a second perspective view of a sector of a swivel outer part of Fig. 1;

    Figure 3 and 4 show a detailed view of a sector of a swivel outer part of Fig. 1;

    Figure 5 shows a cross-section of a swivel wall according to the prior art;

    Figure 6 shows a cross-section of a swivel wall;

    Figure 7 shows a cross-section of a swivel wall according to the prior art;

    Figure 8 shows a cross-section of a swivel wall according to an embodiment of the invention, and

    Figure 9 shows a cross-section of a swivel wall.



    [0027] In the drawings, the same reference numerals refer to similar or identical components in each of the figures.

    Detailed description of embodiments



    [0028] Figure 5 shows a cross-section of a swivel wall of a toroidal fluid swivel according to the prior art.

    [0029] A toroidal fluid swivel is arranged for transfer of a fluid F across a rotary interface R within a swivel rotational central plane SP between an incoming fluid line and an outgoing product piping. The rotation axis A is perpendicular to the swivel rotational central plane SP. The toroidal fluid swivel comprises an inner annular element 5 and an outer annular element 6, that are located with their adjacent cylindrical surfaces 71, 72 in a close proximity.

    [0030] In the swivel rotational central plane SP the inner annular element 5 and the outer annular element 6 define a chamber 7 between the adjacent cylindrical surfaces of the inner and outer annular elements 5, 6 for receiving the fluid F.

    [0031] The inner annular element 5 of the swivel is arranged with a connecting conduit L1 to be connected to an end of the incoming fluid line from for example an offshore well. The connecting conduit L1 extends through the inner annular element 5 into the chamber 7 for supply of the fluid to the chamber.

    [0032] The outer annular element 6 of the swivel is arranged to be connected to the outgoing product piping and is provided with a primary duct 8 for transport of the fluid from the chamber 7 to the product piping L2 on board of a floating vessel.

    [0033] The swivel further comprises an arrangement of bearings 73 that guide the inner annular element 5 relative the outer annular element 6. The bearings are schematically depicted by block 73.

    [0034] Figure 1 shows a first perspective view of a sector of an outer annular element 6 of a swivel.

    [0035] The outer annular element 6 consists of a high strength metal workpiece, preferably made of steel, for example by forging or casting. Around the outer periphery 14 of the outer annular element an outer reinforcing annular wall 10 is positioned. The inner surface of the outer reinforcing annular wall 10 is in close proximity with the outer surface of the outer annular element, and comprises two centering surface portions that extend along the periphery of the inward surface of then reinforcing annular wall 10.

    [0036] The two centering surface portions 11, 12 are arranged for contacting and/or registering with the outer peripheral wall of the outer annular element with zero or a substantially minimal play. This allows that when the outer annular element due to pressure in the chamber 7 elastically expands, the centering surface portions 11, 12 virtually directly contact the outer surface 14 of the outer annular element 6 and provide a mechanical strengthening of the outer annular element.

    [0037] Further, the outer reinforcing annular wall has at least a first central peripheral opening 13 extending along a portion of the periphery of the outer reinforcing annular wall for allowing the primary duct 8 to pass trough there.

    [0038] In an embodiment, the duct is a nozzle or comprises a nozzle shaped portion.

    [0039] In an embodiment, the outer reinforcing annular wall 10 comprises an upper outer reinforcing annular wall portion 10A and a lower outer reinforcing annular wall portion 10B, that are coupled on a common dividing surface 10C by mechanical joints such as bolts, rods or by welding (not shown in detail). The dividing surface 10C may be a mating surface.

    [0040] Positioning an upper and lower outer reinforcing annular wall portion 10A, 10B to enclose the outer annular wall 6 between them and joining the two portions mechanically allow a high pressure vessel such as a swivel be constructed with a relatively large diameter without too much effort.

    [0041] Figure 2 shows a second perspective view of a sector of the outer annular element 6 of the swivel according to Fig. 1.

    [0042] In a further embodiment, the outer reinforcing annular wall 10 is arranged with one or more additional central peripheral openings 17; 18 extending along a portion 17a; 18a of the periphery of the outer reinforcing annular wall for allowing a second duct or a port (not shown) to pass through.

    [0043] Figure 3 and Figure 4 show a detailed view of a sector of the arrangement of the outer annular element and the outer reinforcing wall as shown in Fig. 1.

    [0044] In an embodiment, the centering surface portions 11, 12 are each arranged as a recessed rim at an upper and lower inward edge, respectively. The recessed rims 11, 12 arranged to receive the outer peripheral wall 14 of the outer annular element 6 in between the inward edges 11, 12.

    [0045] By designing an appropriate play between the outer reinforcing annular wall and the outer annular element, an upper edge 15 of the outer peripheral wall is arranged to fit the upper inward edge 11 and a lower edge 16 of the outer peripheral wall is arranged to fit the lower inward edge 12.

    [0046] In this manner the outer annular element is kept in a substantially fixed position within the outer reinforcing annular wall, which improves the stability of the arrangement.

    [0047] Figure 6 shows a cross-section of a swivel wall.

    [0048] In this embodiment, the outer annular element of the swivel is supported by the outer reinforcing annular wall, with centering surface portions that protrude towards the outer peripheral wall or surface 14 of the outer annular element 6.

    [0049] Additionally, the inner annular element 5 of the toroidal fluid swivel is supported by an inner reinforcing annular wall 20, with inner centering surface portions 21, 22 that protrude outwards to the inner peripheral wall or surface 24 of the inner annular element 5.

    [0050] This embodiment provides that the inner annular element 5 is supported to prevent its movement away from the outer annular element 6 at the rotary interface R, in case of high pressure from the side of the outer annular element 6.

    [0051] The inner reinforcing annular wall 20 may comprise an upper and a lower inner reinforcing annular wall portion 20A, 20B that are joint at a dividing peripheral surface (not shown) by mechanical means (bolts or rods) or by welds. In between the upper and lower inner reinforcing annular wall portions 20A, 20B at least one opening 23 will be available for the connecting conduit L1 to pass through.

    [0052] Figure 7 shows a cross-section of a toroidal swivel wall according to the prior art.

    [0053] The toroidal swivel of figure 7 is similar to the swivel shown in figure 5. Additionally, the outer and inner annular elements each comprise at their respective upper and lower circular planes parallel to the swivel rotational central plane SP, a sealing ring 51, 61, 52, 62.

    [0054] The toroidal fluid swivel thus comprises an upper inner sealing ring 51, an upper outer sealing ring 61, a lower inner sealing ring 52 and a lower outer sealing ring 62. The upper inner sealing ring 51 is mounted on the circular surface of the inner annular element 5 above the swivel rotational central plane SP. The upper outer sealing ring 61 is mounted on the circular surface of the outer annular element 6 above the swivel rotational central plane SP. The inner peripheral surface of the upper outer sealing ring 61 is in close proximity with the outer peripheral surface of the upper inner sealing ring 51.

    [0055] The lower inner sealing ring 52 is mounted on the circular surface of the inner annular element 5 below the swivel rotational central plane SP and the lower outer sealing ring is mounted on the circular surface of the outer annular element 6 below the swivel rotational central plane SP. The inner peripheral surface of the lower outer sealing ring 62 is in close proximity with the outer peripheral surface of the lower inner sealing ring 52.

    [0056] Figure 8 shows a cross-section of a toroidal fluid swivel wall according to an embodiment of the invention. In this embodiment, the prior art toroidal fluid swivel as shown in figure 7 is reinforced on both the outer and inner periphery.

    [0057] In addition to the outer reinforcing annular wall 10;10A, 10B and inner reinforcing annular wall 20; 20A, 20B that are arranged with respective centering surface portions 11, 12; 21, 22 to contact or register with the outer peripheral wall 14 of the outer annular element and the inner peripheral wall 24 of the inner annular element respectively, the swivel comprises a secondary outer upper reinforcing ring 30A, a secondary outer lower reinforcing ring 30B, a secondary inner upper reinforcing ring 40A and a secondary inner lower reinforcing ring 40B. Each of the rings 30A, 30B, 40A, 40B has a centre that coincides with the rotation axis A of the swivel.

    [0058] The secondary outer upper reinforcing ring 30A is arranged above the swivel rotational central plane SP and comprises at an inner peripheral surface a secondary peripheral centering surface portion 31 for contacting and/or registering with the outer peripheral wall of the upper outer sealing ring 61.

    [0059] The secondary outer lower reinforcing ring 30B is arranged below the swivel rotational central plane SP and comprises at an inner peripheral surface a secondary peripheral centering surface portion 32 for contacting and/or registering with the outer peripheral wall of the lower outer sealing ring 62.

    [0060] The secondary inner upper reinforcing ring 40A is arranged above the swivel rotational central plane SP and comprises at an outer peripheral surface a secondary peripheral centering surface portion 41 for contacting and/or registering with the inner peripheral wall of the upper inner sealing ring 51.

    [0061] The secondary inner lower reinforcing ring 40B is arranged below the swivel rotational central plane SP and comprises at an outer peripheral surface a secondary peripheral centering surface portion 42 for contacting and/or registering with the inner peripheral wall of the lower inner sealing ring 52.

    [0062] In an embodiment, each outer upper and lower reinforcing ring 10A, 10B could be stacked with its associated secondary outer upper and lower reinforcing ring 30A, 30B, depending the rings can be constructed appropriately in terms of dimensions and strength. Likewise, each inner upper and lower reinforcing rings 20A, 20B could be stacked with the associated secondary inner upper and lower reinforcing ring 40A, 40B.

    [0063] However, stacking may be prohibited due to the size (height) of the reinforcing rings.

    [0064] In an embodiment, the secondary reinforcing rings 30A, 30B, 40A, 40B are spaced apart from the reinforcing rings 10A, 10B, 20A, 20B in a direction parallel to the swivel rotational central lane SP. The toroidal fluid swivel comprises an outer upper spacer ring 34, an outer lower spacer ring 35, an inner upper spacer ring 44 and an inner lower spacer ring 45. Each spacer ring has a center that coincides with the rotational axis A of the swivel.

    [0065] Further each spacer ring 34, 35, 44, 45 has an inner centering surface portion 36, 37, 46, 47 at its inner peripheral edge and an outer centering surface portion 38, 39, 48, 49 at its outer peripheral edge.

    [0066] In the embodiment shown in figure 8, the reinforcing rings 10A, 10B, 20A, 20B are positioned at a relatively larger distance from the outer and inner annular walls than the secondary reinforcing rings 30A, 30B, 40A, 40B. The outer upper spacer ring 34 is arranged horizontally intermediate the upper outer reinforcing annular wall 10A and the outer annular element 6 and vertically between the secondary outer upper reinforcing ring 30A and the swivel rotational central plane SP. The outer lower spacer ring 35 is positioned horizontally intermediate the lower outer reinforcing annular wall 10B and the outer annular element 6 and vertically between the secondary outer lower reinforcing ring 30B and the swivel rotational central plane SP. The inner upper spacer ring 44 is horizontally intermediate the upper inner reinforcing annular wall 20A and the inner annular element 5 and vertically between the secondary inner upper reinforcing ring 40A and the swivel rotational central plane SP. The inner lower spacer ring 45 is positioned horizontally intermediate the lower inner reinforcing annular wall 20B and the inner annular element 5 and vertically between the secondary inner lower reinforcing ring 40B and the swivel rotational central plane SP.

    [0067] Alternatively, the arrangement may be reversed: the reinforcing rings 10A, 10B, 20A, 20B are positioned at a relatively shorter distance from the outer and inner annular walls than the secondary reinforcing rings 30A, 30B, 40A, 40B, by inserting the spacer rings between the each secondary reinforcing ring 30A; 30B; 40A; 40B and the respective sealing ring 61; 62; 51; 52.

    [0068] As shown above with reference to figures 1 - 8, obtaining a mechanical coupling between consecutive rings (annular elements) is necessary since the purpose is to transfer part of the radial deflection of the loaded ring to the reinforcing ring. The approach as described above is the application of centering surface portions or centering registers. To this end the radial play between consecutive rings (e.g. between the outer annular wall and the outer reinforcing ring) must be relatively small enough compared to the expected radial deflection of the loaded ring (in this example the outer annular wall).

    [0069] Figure 9 shows a cross-section of a detail of a swivel wall.

    [0070] In this alternative embodiment, mechanical coupling is obtained by hydraulic means. Between an outer and inner annular element 6; 5 of the swivel and the associated outer or inner reinforcing ring 10; 10A, 10B; 20; 20A, 20B a secondary annular chamber 80 is created between the centering surface positions 11, 12; 21, 22. The secondary chamber is coupled to a hydraulic system (not shown) that is arranged to inject fluid into the secondary chamber. Varying the pressure level of the injected fluid permits to adjust the load sharing between two consecutive rings (e.g. the outer annular element and the outer reinforcing ring). It is noted that the centering surface portions can be arranged as a mechanical back-up.

    [0071] In an embodiment, the material of the outer reinforcing annular wall and/or the inner reinforcing annular wall selected from a material group comprising steel alloys and composites.

    [0072] Similarly, the spacer rings can be manufactured from a same material such a steel alloy or a composite.

    [0073] In case a steel alloy is selected, the steel may be a forged steel, a rolled steel plate material or a cast steel.

    [0074] The invention has been described with reference to the above embodiments. Obvious modifications and alterations will occur to others upon reading and understanding the preceding detailed description. It is intended that the invention be construed as including all such modifications and alterations insofar as they come within the scope of the appended claims.


    Claims

    1. A fluid swivel for allowing transfer of a fluid across a rotary interface in a swivel rotational central plane between an incoming fluid line and an outgoing product piping; the swivel comprising an inner annular element (5) and an outer annular element (6), that are located with their adjacent cylindrical surfaces (71, 72) in a close proximity, the inner annular element (5) and the outer annular element (6) defining in the swivel rotational central plane a chamber (7) between the adjacent cylindrical surfaces of the inner and outer annular elements for receiving the fluid, wherein the inner annular element (5) of the swivel is arranged with a connecting conduit (L1) to be connected to an end of the incoming fluid line which extends through said element to the chamber for supply of the fluid to the chamber, and wherein the outer annular element (6) of the swivel is arranged to be connected to the outgoing product piping and is provided with a primary duct (8) for transport of the fluid from the chamber to the product piping, wherein the swivel comprises a primary outer reinforcing annular wall (10) arranged adjacent to and around the outer peripheral wall of the outer annular element (6), the primary outer reinforcing annular wall (10) being arranged with two peripheral centering surface portions (11, 12) for contacting and/or registering with the outer peripheral wall of the outer annular element (6), the primary outer reinforcing annular wall (10) further being arranged with at least a first central peripheral opening (13) extending along a portion of the periphery of the outer reinforcing annular wall for allowing the primary duct (8) to pass through there, wherein the swivel comprises a primary inner reinforcing annular wall (20) arranged adjacent to the inner peripheral wall of the inner annular element (5), the primary inner reinforcing annular wall (20) being arranged with two peripheral centering surface portions (21, 22) for contacting and/or registering with the inner peripheral wall of the inner annular element, the primary inner reinforcing annular wall (20) further being arranged with a first central peripheral opening (23) along a portion of the periphery of the inner reinforcing annular wall for allowing the connecting conduit (L1) to pass through there,
    characterized in that the swivel further comprises an upper inner sealing ring (51), an upper outer sealing ring (61), a lower inner sealing ring (52) and a lower outer sealing ring (62); the upper inner sealing ring (51) being mounted on the inner annular element (5) above the swivel rotational central plane; the upper outer sealing ring (61) being mounted on the outer annular element (6) above the swivel rotational central plane with its inner peripheral surface in close proximity with the outer peripheral surface of the upper inner sealing ring; the lower inner sealing ring (52) being mounted on the inner annular element (5) below the swivel rotational central plane; the lower outer sealing ring (62) being mounted on the outer annular element (6) below the swivel rotational central plane with its inner peripheral surface in close proximity with the outer peripheral surface of the lower inner sealing ring;
    wherein the swivel comprises a secondary outer upper reinforcing ring (30a), a secondary outer lower reinforcing ring (30b), a secondary inner upper reinforcing ring (40a) and a secondary inner lower reinforcing ring (40b), wherein the secondary outer upper reinforcing ring (30a) is arranged above the swivel rotational central plane and comprises at an inner peripheral surface a secondary peripheral centering surface portion (31) for contacting and/or registering with the outer peripheral wall of the upper outer sealing ring (61); the secondary outer lower reinforcing ring (30b) is arranged below the swivel rotational central plane and comprises at an inner peripheral surface a secondary peripheral centering surface portion (32) for contacting and/or registering with the outer peripheral wall of the lower outer sealing ring (62); the secondary inner upper reinforcing ring (40a) is arranged above the swivel rotational central plane and comprises at an outer peripheral surface a secondary peripheral centering surface portion (41) for contacting and/or registering with the inner peripheral wall of the upper inner sealing ring (51), and the secondary inner lower reinforcing ring (40b) is arranged below the swivel rotational central plane and comprises at an outer peripheral surface a secondary peripheral centering surface portion (42) for contacting and/or registering with the inner peripheral wall of the lower inner sealing ring (52).
     
    2. Swivel according to claim 1, wherein the peripheral centering surface portions are arranged as a recessed rim with an upper and lower inward edge (11, 12), arranged to receive the outer peripheral wall of the outer annular element in between the inward edges with an upper edge of the outer peripheral wall fitting the upper inward edge and a lower edge of the outer peripheral wall fitting the lower inward edge.
     
    3. Swivel according to claim 1 or 2, wherein the primary outer reinforcing annular wall (10) further being arranged with one or more additional central peripheral openings (17, 18) extending along a portion of the periphery of the outer reinforcing annular wall for allowing either a second duct or a port to pass through.
     
    4. Swivel according to any one of claims 1 - 3, wherein the primary outer reinforcing annular wall (10) comprises an upper outer reinforcing annular wall portion and a lower outer reinforcing annular wall portion wherein the upper and lower portions are coupled to each other by mechanical joints.
     
    5. Swivel according to claim 1, wherein the primary inner reinforcing annular wall (20) comprises an upper inner reinforcing annular wall portion and a lower inner reinforcing annular wall portion wherein the upper and lower portions are coupled to each other by mechanical joints.
     
    6. Swivel according to claim 1, wherein the swivel comprises an outer upper spacer ring (34), an outer lower spacer ring (35), an inner upper spacer ring (44) and an inner lower spacer ring (45); each spacer ring having an inner centering surface portion at its inner peripheral edge and an outer centering surface portion at its outer peripheral edge;
    the outer upper spacer ring being intermediate the primary outer reinforcing annular wall and the outer annular element and between the secondary outer upper reinforcing ring and the swivel rotational central plane;
    the outer lower spacer ring being intermediate the primary outer reinforcing annular wall and the outer annular element and between the secondary outer lower reinforcing ring and the swivel rotational central plane;
    the inner upper spacer ring being intermediate the primary inner reinforcing annular wall and the inner annular element and between the secondary inner upper reinforcing ring and the swivel rotational central plane;
    and the inner lower spacer ring being intermediate the primary inner reinforcing annular wall and the inner annular element and between the secondary inner lower reinforcing ring and the swivel rotational central plane.
     
    7. Swivel according to claim 1, wherein
    the swivel comprises an outer upper spacer ring (34), an outer lower spacer ring (35), an inner upper spacer ring (44) and an inner lower spacer ring (45); each spacer ring having an inner centering surface portion at its inner peripheral edge and an outer centering surface portion at its outer peripheral edge;
    the outer upper spacer ring being intermediate the secondary outer upper reinforcing ring and the upper outer sealing ring, and above the primary outer reinforcing annular wall and the swivel rotational central plane;
    the outer lower spacer ring being intermediate the secondary outer upper reinforcing ring and the lower outer sealing ring, and below the primary outer reinforcing annular wall and the swivel rotational central plane;
    the inner upper spacer ring being intermediate the secondary outer upper reinforcing ring and the inner upper sealing ring, and above the primary inner upper reinforcing annular wall and the swivel rotational central plane;
    and the inner lower spacer ring being intermediate secondary inner lower reinforcing ring and the inner lower sealing ring, and below the primary inner lower reinforcing annular wall and the swivel rotational central plane.
     
    8. Swivel according to any one of the preceding claims, wherein the outer reinforcing annular wall and/or the inner reinforcing annular wall is manufactured from a material selected from a group comprising steel, steel alloys and composites.
     
    9. Swivel according to any one of claims 6 or 7, or 8 when depending on any one of claims 6 or 7, wherein the spacer rings may be manufactured from a material selected from the group comprising steel, steel alloys and composites.
     
    10. Swivel according to claim 8 or 9, wherein the steel comprises forged steel, rolled steel plate and cast steel.
     
    11. Swivel according to any one of the preceding claims, wherein the primary duct either is a nozzle or comprises a nozzle shaped portion.
     
    12. Swivel according to according to any one of the preceding claims, wherein additionally between the outer annular element of the swivel and the associated outer reinforcing ring a secondary annular chamber (80) is created inbetween the centering surface positions, the secondary annular chamber being arranged for coupling to a hydraulic system arranged for injecting hydraulic fluid into said secondary annular chamber.
     
    13. Swivel according to according to any one of the preceding claims, wherein additionally between the inner annular element of the swivel and the associated inner reinforcing ring a further annular chamber (80) is created inbetween the centering surface positions, the further annular chamber being arranged for coupling to a hydraulic system arranged for injecting hydraulic fluid into said further annular chamber.
     
    14. Method for manufacturing a toroidal fluid swivel for transfer of a fluid across a rotary interface in a swivel rotational central plane between an incoming fluid line and an outgoing product piping; the swivel comprising an inner annular element (5) and an outer annular element (6), that are located with their adjacent cylindrical surfaces in a close proximity, the inner annular element and the outer annular element defining in the swivel rotational central plane a chamber between the adjacent cylindrical surfaces of the inner and outer annular elements for receiving the fluid, wherein the inner annular element of the swivel is arranged with a connecting conduit to be connected to an end of the incoming fluid line which extends through said element to the chamber for supply of the fluid to the chamber, and wherein the outer annular element of the swivel is arranged to be connected to the outgoing product piping and is provided with a primary duct for transport of the fluid from the chamber to the product piping, the method comprising:

    arranging a primary outer reinforcing annular wall (10) adjacent to and around the outer peripheral wall of the outer annular element;

    arranging the primary outer reinforcing annular wall with two peripheral centering surface portions for contacting and/or registering with the outer peripheral wall of the outer annular element,

    arranging the primary outer reinforcing annular wall further with at least a first central peripheral opening extending along a portion of the periphery of the outer reinforcing annular wall for allowing the primary duct to pass through there,

    arranging a primary inner reinforcing annular wall (20) adjacent to the inner peripheral wall of the inner annular element, the primary inner reinforcing annular wall being arranged with two peripheral centering surface portions for contacting and/or registering with the inner peripheral wall of the inner annular element,

    arranging the primary inner reinforcing annular wall further with a first central peripheral opening along a portion of the periphery of the inner reinforcing annular wall for allowing the connecting conduit to pass through there,

    mounting an upper inner sealing ring (51), an upper outer sealing ring (61), a lower inner sealing ring (52) and a lower outer sealing ring (62);

    the upper inner sealing ring being mounted on the inner annular element above the swivel rotational central plane; the upper outer sealing ring being mounted on the outer annular element above the swivel rotational central plane with its inner peripheral surface in close proximity with the outer peripheral surface of the upper inner sealing ring; the lower inner sealing ring being mounted on the inner annular element below the swivel rotational central plane; the lower outer sealing ring being mounted on the outer annular element below the swivel rotational central plane with its inner peripheral surface in close proximity with the outer peripheral surface of the lower inner sealing ring;

    wherein the swivel comprises a secondary outer upper reinforcing ring (30a), a secondary outer lower reinforcing ring (30b), a secondary inner upper reinforcing ring (40a) and a secondary inner lower reinforcing ring (40b), wherein the secondary outer upper reinforcing ring is arranged above the swivel rotational central plane and comprises at an inner peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the outer peripheral wall of the upper outer sealing ring;

    arrange the secondary outer lower reinforcing ring below the swivel rotational central plane and comprises at an inner peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the outer peripheral wall of the lower outer sealing ring;

    the secondary inner upper reinforcing ring is arranged above the swivel rotational central plane and comprises at an outer peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the inner peripheral wall of the upper inner sealing ring, and the secondary inner lower reinforcing ring is arranged below the swivel rotational central plane and comprises at an outer peripheral surface a secondary peripheral centering surface portion for contacting and/or registering with the inner peripheral wall of the lower inner sealing ring.


     


    Ansprüche

    1. Fluiddrehverbindung zum Ermöglichen der Übertragung eines Fluids über eine Rotationsschnittstelle in einer Drehverbindungsrotationsmittelebene zwischen einem Eingangsfluidstrang und einem Ausgangsproduktleitungssystem hinweg; wobei die Drehverbindung ein inneres Ringelement (5) und ein äußeres Ringelement (6) aufweist, die mit in unmittelbarer Nähe benachbarten Zylinderflächen (71, 72) angeordnet sind, wobei das innere Ringelement (5) und das äußere Ringelement (6) in der Drehverbindungsrotationsmittelebene eine Kammer (7) zum Aufnehmen des Fluids zwischen den benachbarten Zylinderflächen der inneren und äußeren Ringelemente definieren, wobei das innere Ringelement (5) der Drehverbindung mit einer Verbindungsleitung (L1) versehen ist, sodass es mit einem Ende des Eingangsfluidstrangs verbunden ist, der sich durch das Element zu der Kammer erstreckt, um das Fluid der Kammer zuzuführen, und wobei das äußere Ringelement (6) der Drehverbindung vorgesehen ist, sodass es mit dem Ausgangsproduktleitungssystem verbunden ist, und mit einem Primärkanal (8) zum Befördern des Fluids von der Kammer zu dem Produktleitungssystem versehen ist, wobei die Drehverbindung eine primäre äußere Verstärkungsringwand (10) aufweist, die benachbart zu der und um die Außenumfangswand des äußeren Ringelements (6) vorgesehen ist,
    wobei
    die primäre äußere Verstärkungsringwand (10) mit zwei Umfangszentrierflächenabschnitten (11, 12) zum Kontakt und/oder Ausrichten mit der Außenumfangswand des äußeren Ringelements (6) versehen ist,
    die primäre äußere Verstärkungsringwand (10) ferner mit mindestens einer ersten mittleren Umfangsöffnung (13) versehen ist, die sich entlang eines Abschnitts des Umfangs der äußeren Verstärkungsringwand erstreckt, um das Hindurchgehen des Primärkanals (8) zu ermöglichen,
    die Drehverbindung eine primäre innere Verstärkungsringwand (20) aufweist, die benachbart zu der Innenumfangswand des inneren Ringelements (5) vorgesehen ist, wobei die primäre innere Verstärkungsringwand (20) mit zwei Umfangszentrierflächenabschnitten (21, 22) zum Kontakt und/oder Ausrichten mit der Innenumfangswand des inneren Ringelements versehen ist, und
    die primäre innere Verstärkungsringwand (20) ferner mit einer ersten mittleren Umfangsöffnung (23) entlang eines Abschnitts des Umfangs der inneren Verstärkungsringwand versehen ist, um das Hindurchgehen der Verbindungsleitung (L1) zu ermöglichen,
    dadurch gekennzeichnet, dass
    die Drehverbindung ferner einen oberen inneren Dichtring (51), einen oberen äußeren Dichtring (61), einen unteren inneren Dichtring (52) und einen unteren äußeren Dichtring (62) aufweist;
    wobei
    der obere innere Dichtring (51) oberhalb der Drehverbindungsrotationsmittelebene an dem inneren Ringelement (5) montiert ist;
    der obere äußere Dichtring (61) oberhalb der Drehverbindungsrotationsmittelebene an dem äußeren Ringelement (6) montiert ist, wobei seine Innenumfangsfläche in unmittelbarer Nähe zu der Außenumfangsfläche des oberen inneren Dichtrings angeordnet ist;
    der untere innere Dichtring (52) unterhalb der Drehverbindungsrotationsmittelebene an dem inneren Ringelement (5) montiert ist;
    der untere äußere Dichtring (62) unterhalb der Drehverbindungsrotationsmittelebene an dem äußeren Ringelement (6) montiert ist, wobei seine Innenumfangsfläche in unmittelbarer Nähe zu der Außenumfangsfläche des unteren inneren Dichtrings an dem äußeren Ringelement (6) angeordnet ist;
    wobei die Drehverbindung einen sekundären äußeren oberen Verstärkungsring (30a), einen sekundären äußeren unteren Verstärkungsring (30b), einen sekundären inneren oberen Verstärkungsring (40a) und einen sekundären inneren unteren Verstärkungsring (40b) aufweist,
    wobei
    der sekundäre äußere obere Verstärkungsring (30a) oberhalb der Drehverbindungsrotationsmittelebene vorgesehen ist und an einer Innenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt (31) zum Kontakt und/oder Ausrichten mit der Außenumfangswand des oberen äußeren Dichtrings (61) hat;
    der zweite äußere untere Verstärkungsring (30b) unterhalb der Drehverbindungsrotationsmittelebene vorgesehen ist und an einer Innenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt (32) zum Kontakt und/oder Ausrichten mit der Außenumfangswand des unteren äußeren Dichtrings (62) hat;
    der sekundäre innere obere Verstärkungsring (40a) oberhalb der Drehverbindungsrotationsmittelebene vorgesehen ist und an einer Außenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt (41) zum Kontakt und/oder Ausrichten mit der Innenumfangswand des oberen inneren Dichtrings (51) hat, und
    der sekundäre innere untere Verstärkungsring (40b) unterhalb der Drehverbindungsrotationsmittelebene vorgesehen ist und an einer Außenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt (42) zum Kontakt und/oder Ausrichten mit der Innenumfangswand des unteren inneren Dichtrings (52) hat.
     
    2. Drehverbindung nach Anspruch 1, wobei die Umfangszentrierflächenabschnitte als ein vertiefter Rand mit einer oberen und einer unteren einwärts gerichteten Kante (11, 12) vorgesehen sind und angeordnet sind, sodass sie die Außenumfangswand des äußeren Ringelements zwischen den einwärts gerichteten Kanten aufnehmen, wobei eine obere Kante der Außenumfangswand an der oberen einwärts gerichteten Kante anliegt, und eine untere Kante der Außenumfangswand an der unteren einwärts gerichteten Kante anliegt.
     
    3. Drehverbindung nach Anspruch 1 oder 2, wobei die primäre äußere Verstärkungsringwand (10) ferner mit einer oder mehreren zusätzlichen mittleren Umfangsöffnungen (17, 18) versehen ist, die sich entlang eines Abschnitts des Umfangs der äußeren Verstärkungsringwand erstrecken, um es entweder einem zweiten Kanal oder einem Anschluss zu ermöglichen, dadurch hindurchzugehen.
     
    4. Drehverbindung nach einem der Ansprüche 1 bis 3, wobei die primäre äußere Verstärkungsringwand (10) einen oberen äußeren Verstärkungsringwandabschnitt und einen unteren äußeren Verstärkungsringwandabschnitt aufweist, wobei die oberen und unteren Abschnitte durch mechanische Gelenke miteinander gekoppelt sind.
     
    5. Drehverbindung nach Anspruch 1, wobei die primäre innere Verstärkungsringwand (20) einen oberen inneren Verstärkungsringwandabschnitt und einen unteren inneren Verstärkungsringwandabschnitt aufweist, wobei die oberen und unteren Abschnitte durch mechanische Gelenke miteinander gekoppelt sind.
     
    6. Drehverbindung nach Anspruch 1, wobei
    die Drehverbindung einen äußeren oberen Abstandsring (34), einen äußeren unteren Abstandsring (35), einen inneren oberen Abstandsring (44) und einen inneren unteren Abstandsring (45) hat;
    jeder Abstandsring einen inneren Zentrierflächenabschnitt an seiner Innenumfangskante und einen äußeren Zentrierflächenabschnitt an seiner Außenumfangskante hat;
    der äußere obere Abstandsring zwischen der primären äußeren Verstärkungsringwand und dem äußeren Ringelement zwischengeschaltet ist und zwischen dem sekundären äußeren oberen Verstärkungsring und der Drehverbindungsrotationsmittelebene angeordnet ist;
    der äußere untere Abstandsring zwischen der primären äußeren Verstärkungsringwand und dem äußeren Ringelement zwischengeschaltet ist und zwischen dem sekundären äußeren unteren Verstärkungsring und der Drehverbindungsrotationsmittelebene angeordnet ist;
    der innere obere Abstandsring zwischen der primären inneren Verstärkungsringwand und dem inneren Ringelement zwischengeschaltet ist und zwischen dem sekundären inneren oberen Verstärkungsring und der Drehverbindungsrotationsmittelebene angeordnet ist; und
    der innere untere Abstandsring zwischen der primären inneren Verstärkungsringwand und dem inneren Ringelement zwischengeschaltet ist und zwischen dem sekundären inneren unteren Verstärkungsring und der Drehverbindungsrotationsmittelebene angeordnet ist.
     
    7. Drehverbindung nach Anspruch 1, wobei
    die Drehverbindung einen äußeren oberen Abstandsring (34), einen äußeren unteren Abstandsring (35), einen inneren oberen Abstandsring (44) und einen inneren unteren Abstandsring (45) hat;
    jeder Abstandsring einen inneren Zentrierflächenabschnitt an seiner Innenumfangskante und einen äußeren Zentrierflächenabschnitt an seiner Außenumfangskante hat;
    der äußere obere Abstandsring zwischen dem sekundären äußeren oberen Verstärkungsring und dem oberen äußeren Dichtring zwischengeschaltet ist und oberhalb der primären äußeren Verstärkungsringwand und der Drehverbindungsrotationsmittelebene angeordnet ist;
    der äußere untere Abstandsring zwischen dem sekundären äußeren oberen Verstärkungsring und dem unteren äußeren Dichtring zwischengeschaltet ist und unterhalb der primären äußeren Verstärkungsringwand und der Drehverbindungsrotationsmittelebene angeordnet ist;
    der innere obere Abstandsring zwischen dem sekundären äußeren oberen Verstärkungsring und dem inneren oberen Dichtring zwischengeschaltet ist und oberhalb der primären inneren oberen Verstärkungsringwand und der Drehverbindungsrotationsmittelebene angeordnet ist; und
    der innere untere Abstandsring zwischen dem sekundären inneren unteren Verstärkungsring und dem inneren unteren Dichtring zwischengeschaltet ist und unterhalb der primären inneren unteren Verstärkungsringwand und der Drehverbindungsrotationsmittelebene angeordnet ist.
     
    8. Drehverbindung nach einem der vorangehenden Ansprüche, wobei die äußere Verstärkungsringwand und/oder die innere Verstärkungsringwand aus einem Werkstoff hergestellt ist/sind, der aus einer Gruppe gewählt ist, die Stahl, Stahllegierungen und Verbundwerkstoffe umfasst.
     
    9. Drehverbindung nach einem der Ansprüche 6 oder 7, oder nach Anspruch 8, falls dieser von einem der Ansprüche 6 oder 7 abhängig ist, wobei die Abstandsringe aus einem Werkstoff hergestellt sein können, der aus der Gruppe ausgewählt ist, die Stahl, Stahllegierungen und Verbundwerkstoffe umfasst.
     
    10. Drehverbindung nach Anspruch 8 oder 9, wobei der Stahl geschmiedeten Stahl, gewalzte Stahlplatte und Stahlguss umfasst.
     
    11. Drehverbindung nach einem der vorangehenden Ansprüche, wobei der Primärkanal entweder eine Düse ist oder einen düsenförmigen Abschnitt aufweist.
     
    12. Drehverbindung nach einem der vorangehenden Ansprüche, wobei zwischen dem äußeren Ringelement der Drehverbindung und dem dazugehörigen äußeren Verstärkungsring zusätzlich eine sekundäre Ringkammer (80) zwischen den Zentrierflächenpositionen geschaffen ist, wobei die sekundäre Ringkammer zum Koppeln an ein Hydrauliksystem vorgesehen ist, das zum Einspritzen von Hydraulikfluid in die sekundäre Ringkammer vorgesehen ist.
     
    13. Drehverbindung nach einem der vorangehenden Ansprüche, wobei zwischen dem inneren Ringelement der Drehverbindung und dem dazugehörigen inneren Verstärkungsring eine weitere Ringkammer (80) zwischen den Zentrierflächenpositionen geschaffen ist, wobei die weitere Ringkammer zum Koppeln an ein Hydrauliksystem vorgesehen ist, das zum Einspritzen von Hydraulikfluid in die weitere Ringkammer vorgesehen ist.
     
    14. Verfahren zum Herstellen einer torusförmigen Fluiddrehverbindung zur Übertragung eines Fluids über eine Rotationsschnittstelle in einer Drehverbindungsrotationsmittelebene zwischen einem Eingangsfluidstrang und einem Ausgangsproduktleitungssystem hinweg; wobei die Drehverbindung ein inneres Ringelement (5) und ein äußeres Ringelement (6) aufweist, die mit in unmittelbarer Nähe benachbarten Zylinderflächen angeordnet sind, wobei das innere Ringelement und das äußere Ringelement in der Drehverbindungsrotationsmittelebene eine Kammer zum Aufnehmen des Fluids zwischen den benachbarten Zylinderflächen der inneren und äußeren Ringelemente definieren, wobei das innere Ringelement der Drehverbindung mit einer Verbindungsleitung versehen ist, sodass es mit einem Ende des Eingangsfluidstrangs verbunden ist, der sich durch das Element zu der Kammer erstreckt, um das Fluid der Kammer zuzuführen, und wobei das äußere Ringelement der Drehverbindung vorgesehen ist, sodass es mit dem Ausgangsproduktleitungssystem verbunden ist, und mit einem Primärkanal zum Befördern des Fluids von der Kammer zu dem Produktleitungssystem versehen ist, wobei das Verfahren Folgendes umfasst:

    Vorsehen einer primären äußeren Verstärkungsringwand (10), die benachbart zu der und um die Außenumfangswand des äußeren Ringelements vorgesehen ist,

    Versehen der primären äußeren Verstärkungsringwand mit zwei Umfangszentrierflächenabschnitten zum Kontakt und/oder Ausrichten mit der Außenumfangswand des äußeren Ringelements,

    Versehen der primären äußeren Verstärkungsringwand ferner mit mindestens einer ersten mittleren Umfangsöffnung, die sich entlang eines Abschnitts des Umfangs der äußeren Verstärkungsringwand erstreckt, um das Hindurchgehen des Primärkanals zu ermöglichen,

    Vorsehen einer primären inneren Verstärkungsringwand (20) benachbart zu der Innenumfangswand des inneren Ringelements, wobei die primäre innere Verstärkungsringwand mit zwei Umfangszentrierflächenabschnitten zum Kontakt und/oder Ausrichten mit der Innenumfangswand des inneren Ringelements versehen ist,

    Versehen der primären inneren Verstärkungsringwand ferner mit einer ersten mittleren Umfangsöffnung entlang eines Abschnitts des Umfangs der inneren Verstärkungsringwand, um das Hindurchgehen der Verbindungsleitung zu ermöglichen, und

    Montieren eines oberen inneren Dichtrings (51), eines oberen äußeren Dichtrings (61), eines unteren inneren Dichtrings (52) und eines unteren äußeren Dichtrings (62);

    wobei

    der obere innere Dichtring oberhalb der Drehverbindungsrotationsmittelebene an dem inneren Ringelement montiert wird;

    der obere äußere Dichtring oberhalb der Drehverbindungsrotationsmittelebene an dem äußeren Ringelement montiert wird, wobei seine Innenumfangsfläche in unmittelbarer Nähe zu der Außenumfangsfläche des oberen inneren Dichtrings angeordnet wird;

    der untere innere Dichtring unterhalb der Drehverbindungsrotationsmittelebene an dem inneren Ringelement montiert wird;

    der untere äußere Dichtring unterhalb der Drehverbindungsrotationsmittelebene an dem äußeren Ringelement montiert wird, wobei seine Innenumfangsfläche in unmittelbarer Nähe zu der Außenumfangsfläche des unteren inneren Dichtrings an dem äußeren Ringelement angeordnet wird;

    wobei die Drehverbindung einen sekundären äußeren oberen Verstärkungsring (30a), einen sekundären äußeren unteren Verstärkungsring (30b), einen sekundären inneren oberen Verstärkungsring (40a) und einen sekundären inneren unteren Verstärkungsring (40b) aufweist,

    wobei

    der sekundäre äußere obere Verstärkungsring oberhalb der Drehverbindungsrotationsmittelebene vorgesehen wird und an einer Innenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt zum Kontakt und/oder Ausrichten mit der Außenumfangswand des oberen äußeren Dichtrings hat;

    der zweite äußere untere Verstärkungsring unterhalb der Drehverbindungsrotationsmittelebene vorgesehen wird und an einer Innenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt zum Kontakt und/oder Ausrichten mit der Außenumfangswand des unteren äußeren Dichtrings hat;

    der sekundäre innere obere Verstärkungsring oberhalb der Drehverbindungsrotationsmittelebene vorgesehen wird und an einer Außenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt zum Kontakt und/oder Ausrichten mit der Innenumfangswand des oberen inneren Dichtrings hat, und

    der sekundäre innere untere Verstärkungsring unterhalb der Drehverbindungsrotationsmittelebene vorgesehen wird und an einer Außenumfangsfläche einen sekundären Umfangszentrierflächenabschnitt zum Kontakt und/oder Ausrichten mit der Innenumfangswand des unteren inneren Dichtrings hat.


     


    Revendications

    1. Raccord pivotant à fluide pour permettre un transfert d'un fluide à travers une interface rotative dans un plan central de rotation de raccord pivotant entre une ligne de fluide entrante et une tuyauterie de produit sortante ; le raccord pivotant comprenant un élément annulaire intérieur (5) et un élément annulaire extérieur (6), qui sont situés avec leurs surfaces cylindriques adjacentes (71, 72) à proximité immédiate, l'élément annulaire intérieur (5) et l'élément annulaire extérieur (6) définissant dans le plan central de rotation de raccord pivotant une chambre (7) entre les surfaces cylindriques adjacentes des éléments annulaires intérieur et extérieur pour recevoir le fluide, dans lequel l'élément annulaire intérieur (5) du raccord pivotant est agencé avec un conduit de connexion (L1) pour être connecté à une extrémité de la ligne de fluide entrante qui s'étend à travers ledit élément vers la chambre pour alimenter le fluide vers la chambre, et dans lequel l'élément annulaire extérieur (6) du raccord pivotant est agencé pour être connecté à la tuyauterie de produit sortante et est muni d'un conduit principal (8) pour un transport du fluide de la chambre à la tuyauterie de produit, dans lequel le raccord pivotant comprend une paroi annulaire de renforcement extérieure principale (10) agencée adjacente et autour de la paroi périphérique extérieure de l'élément annulaire extérieur (6), la paroi annulaire de renforcement extérieure principale (10) étant agencée avec deux parties de surface de centrage périphériques (11, 12) pour entrer en contact et/ou se caler avec la paroi périphérique extérieure de l'élément annulaire extérieur (6), la paroi annulaire de renforcement extérieure principale (10) étant en outre agencée avec au moins une première ouverture périphérique centrale (13) s'étendant le long d'une partie de la périphérie de la paroi annulaire de renforcement extérieure pour permettre au conduit principal (8) de passer à travers celle-ci,
    dans lequel le raccord pivotant comprend une paroi annulaire de renforcement intérieure principale (20) disposée adjacente à la paroi périphérique intérieure de l'élément annulaire intérieur (5), la paroi annulaire de renforcement intérieure principale (20) étant agencée avec deux parties de surface de centrage périphériques (21, 22) pour entrer en contact et/ou se caler avec la paroi périphérique intérieure de l'élément annulaire intérieur, la paroi annulaire de renforcement intérieure principale (20) étant en outre agencée avec une première ouverture périphérique centrale (23) le long d'une partie de la périphérie de la paroi annulaire de renforcement intérieure pour permettre au conduit de connexion (L1) de passer à travers celle-ci,
    caractérisé en ce que
    le raccord pivotant comprend en outre une bague d'étanchéité intérieure supérieure (51), une bague d'étanchéité extérieure supérieure (61), une bague d'étanchéité intérieure inférieure (52) et une bague d'étanchéité extérieure inférieure (62) ;
    la bague d'étanchéité intérieure supérieure (51) étant montée sur l'élément annulaire intérieur (5) au-dessus du plan central de rotation de raccord pivotant ; la bague d'étanchéité extérieure supérieure (61) étant montée sur l'élément annulaire extérieur (6) au-dessus du plan central de rotation de raccord pivotant avec sa surface périphérique intérieure à proximité immédiate de la surface périphérique extérieure de la bague d'étanchéité intérieure supérieure ; la bague d'étanchéité intérieure inférieure (52) étant montée sur l'élément annulaire intérieur (5) sous le plan central de rotation de raccord pivotant ; la bague d'étanchéité extérieure inférieure (62) étant montée sur l'élément annulaire extérieur (6) sous le plan central de rotation de raccord pivotant avec sa surface périphérique intérieure à proximité immédiate de la surface périphérique extérieure de la bague d'étanchéité intérieure inférieure ;
    dans lequel le raccord pivotant comprend une bague de renforcement supérieure extérieure secondaire (30a), un bague de renforcement inférieure extérieure secondaire (30b), un bague de renforcement supérieure intérieure secondaire (40a) et un bague de renforcement inférieur intérieure secondaire (40b),
    dans lequel la bague de renforcement supérieure extérieure secondaire (30a) est agencée au-dessus du plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique intérieure une partie de surface de centrage périphérique secondaire (31) pour entrer en contact et/ou se caler avec la paroi périphérique extérieure de la bague d'étanchéité extérieure supérieure (61) ;
    la bague de renforcement inférieure extérieure secondaire (30b) est agencée en dessous du plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique intérieure une partie de surface de centrage périphérique secondaire (32) pour entrer en contact et/ou se caler avec la paroi périphérique extérieure de la bague d'étanchéité extérieure inférieure (62) ;
    la bague de renforcement supérieure intérieure secondaire (40a) est agencée au-dessus du plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique extérieure une partie de surface de centrage périphérique secondaire (41) pour entrer en contact et/ou se caler avec la paroi périphérique intérieure de la bague d'étanchéité intérieure supérieure (51), et la bague de renforcement inférieure intérieure secondaire (40b) est agencée en dessous du plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique extérieure une partie de surface de centrage périphérique secondaire (42) pour entrer en contact et/ou se caler avec la paroi périphérique intérieure de la bague d'étanchéité intérieure inférieure (52).
     
    2. Raccord pivotant selon la revendication 1, dans lequel les parties de la surface de centrage périphériques sont agencées sous la forme d'un rebord évidé avec des bords intérieurs supérieur et inférieur (11, 12), agencé pour recevoir la paroi périphérique extérieure de l'élément annulaire extérieur entre les bords intérieurs avec un bord supérieur de la paroi périphérique extérieure s'ajustant au bord intérieur supérieur et un bord inférieur de la paroi périphérique extérieure s'ajustant au bord intérieur inférieur.
     
    3. Raccord pivotant selon la revendication 1 ou 2, dans lequel la paroi annulaire de renforcement extérieure principale (10) est en outre agencée avec une ou plusieurs ouvertures périphériques centrales supplémentaires (17, 18) s'étendant le long d'une partie de la périphérie de la paroi annulaire de renforcement extérieure pour permettre à un second conduit ou à un orifice d'accès de passer à travers celle-ci.
     
    4. Raccord pivotant selon l'une quelconque des revendications 1 à 3, dans lequel la paroi annulaire de renforcement extérieure principale (10) comprend une partie de paroi annulaire de renforcement extérieure supérieure et une partie de paroi annulaire de renforcement extérieure inférieure, dans lequel les parties supérieure et inférieure sont couplées l'une à l'autre par mécanique les articulations.
     
    5. Raccord pivotant selon la revendication 1, dans lequel la paroi annulaire de renforcement intérieure principale (20) comprend une partie de paroi annulaire de renforcement intérieure supérieure et une partie de paroi annulaire de renforcement intérieure inférieure dans laquelle les parties supérieure et inférieure sont couplées l'une à l'autre par des joints mécaniques.
     
    6. Raccord pivotant selon la revendication 1, dans lequel le raccord pivotant comprend une bague d'espacement supérieure extérieure (34), une bague d'espacement inférieure extérieure (35), une bague d'espacement supérieure intérieure (44) et une bague d'espacement inférieure intérieure (45) ;
    chaque bague d'espacement ayant une partie de surface de centrage intérieure à son bord périphérique intérieur et une partie de surface de centrage extérieur à son bord périphérique extérieur ;
    la bague d'espacement supérieure extérieure étant intermédiaire entre la paroi annulaire de renforcement extérieure principale et l'élément annulaire extérieur et entre la bague de renforcement supérieure extérieure secondaire et le plan central de rotation de raccord pivotant ;
    la bague d'espacement inférieure extérieure étant intermédiaire entre la paroi annulaire de renforcement extérieure principale et l'élément annulaire extérieur et entre la bague de renforcement inférieure extérieure secondaire et le plan central de rotation de raccord pivotant ;
    la bague d'espacement supérieure intérieure étant intermédiaire entre la paroi annulaire de renforcement intérieure principale et l'élément annulaire intérieur et entre la bague de renforcement supérieure intérieure secondaire et le plan central de rotation de raccord pivotant ;
    et la bague d'espacement inférieure intérieure étant intermédiaire entre la paroi annulaire de renforcement intérieure principale et l'élément annulaire intérieur et entre la bague de renforcement inférieure intérieure secondaire et le plan central de rotation de raccord pivotant.
     
    7. Raccord pivotant selon la revendication 1, dans lequel
    le raccord pivotant comprend une bague d'espacement supérieure extérieure (34), une bague d'espacement inférieure extérieure (35), une bague d'espacement supérieure intérieure (44) et une bague d'espacement inférieure intérieure (45) ;
    chaque bague d'espacement ayant une partie de surface de centrage intérieure à son bord périphérique intérieur et une partie de surface de centrage extérieur à son bord périphérique extérieur ;
    la bague d'espacement supérieure extérieure étant intermédiaire entre la bague de renforcement supérieure extérieure secondaire et la bague d'étanchéité extérieure supérieure, et au-dessus de la paroi annulaire de renforcement extérieure principale et du plan central de rotation de raccord pivotant ;
    la bague d'espacement inférieure extérieure étant intermédiaire entre la bague de renforcement supérieure extérieure secondaire et la bague d'étanchéité extérieure inférieure, et sous la paroi annulaire de renforcement extérieure principale et le plan central de rotation de raccord pivotant ;
    la bague d'espacement supérieure intérieure étant intermédiaire entre la bague de renforcement supérieure extérieure secondaire et la bague d'étanchéité supérieure intérieure, et au-dessus de la paroi annulaire de renforcement supérieure intérieure principale et du plan central de rotation de raccord pivotant ;
    et la bague d'espacement inférieure intérieure étant intermédiaire la bague de renforcement inférieure intérieure secondaire et la bague d'étanchéité inférieure intérieure, et en dessous de la paroi annulaire de renforcement inférieure intérieure principale et du plan central de rotation de raccord pivotant.
     
    8. Raccord pivotant selon l'une quelconque des revendications précédentes, dans lequel la paroi annulaire extérieure de renforcement et/ou la paroi annulaire intérieure de renforcement est fabriquée à partir d'un matériau choisi dans un groupe comprenant de l'acier, des alliages d'acier et des composites.
     
    9. Raccord pivotant selon l'une quelconque des revendications 6 ou 7, ou 8 lorsque dépendante de l'une quelconque des revendications 6 ou 7, dans lequel les bagues d'espacement peuvent être fabriquées à partir d'un matériau choisi dans le groupe comprenant de l'acier, des alliages d'acier et des composites.
     
    10. Raccord pivotant selon la revendication 8 ou 9, dans lequel l'acier comprend de l'acier forgé, une tôle d'acier laminée et de la fonte d'acier.
     
    11. Raccord pivotant selon l'une quelconque des revendications précédentes, dans lequel le conduit principal est soit une buse, soit comprend une partie en forme de buse.
     
    12. Raccord pivotant selon l'une quelconque des revendications précédentes, dans lequel en outre entre l'élément annulaire extérieur du raccord pivotant et la bague de renforcement extérieure associée, une chambre annulaire secondaire (80) est créée entre les positions de surface de centrage, la chambre annulaire secondaire étant agencée pour un couplage à un système hydraulique agencé pour injecter du fluide hydraulique dans ladite chambre annulaire secondaire.
     
    13. Raccord pivotant selon l'une quelconque des revendications précédentes, dans lequel en outre entre l'élément annulaire intérieur du raccord pivotant et la bague de renforcement intérieure associée, une chambre annulaire supplémentaire (80) est créée entre les positions de surface de centrage, la chambre annulaire supplémentaire étant disposée pour un couplage à un système hydraulique agencé pour injecter du fluide hydraulique dans ladite chambre annulaire supplémentaire.
     
    14. Méthode de fabrication d'un raccord pivotant toroïdal à fluide pour un transfert d'un fluide à travers une interface rotative dans un plan central de rotation de raccord pivotant entre une ligne de fluide entrante et une tuyauterie de produit sortante ; le raccord pivotant comprenant un élément annulaire intérieur (5) et un élément annulaire extérieur (6), qui sont situés avec leurs surfaces cylindriques adjacentes à proximité immédiate, l'élément annulaire intérieur et l'élément annulaire extérieur définissant dans le plan central de rotation de raccord pivotant une chambre entre les surfaces cylindriques adjacentes des éléments annulaires intérieur et extérieur pour recevoir du fluide, dans lequel l'élément annulaire intérieur du raccord pivotant est agencé avec un conduit de connexion pour être connecté à une extrémité de la ligne de fluide entrante qui s'étend à travers ledit élément jusqu'à la chambre pour une alimentation en fluide de la chambre, et dans lequel l'élément annulaire extérieur du raccord pivotant est agencé pour être connecté à la tuyauterie de produit sortante et est pourvu d'un conduit principal pour un transport du fluide de la chambre vers la tuyauterie de produit,
    la méthode comprenant les étapes consistant à :

    agencer une paroi annulaire de renforcement extérieure principale (10) adjacente à et autour de la paroi périphérique extérieure de l'élément annulaire extérieur ;

    agencer la paroi annulaire de renforcement extérieure principale avec deux parties de surface de centrage périphériques pour entrer en contact et/ou se caler avec la paroi périphérique extérieure de l'élément annulaire extérieur,

    agencer en outre la paroi annulaire de renforcement extérieure principale avec au moins une première ouverture périphérique centrale s'étendant le long d'une partie de la périphérie de la paroi annulaire de renforcement extérieure pour permettre au conduit principal de passer à travers celle-ci,

    agencer une paroi annulaire de renforcement intérieure principale (20) adjacente à la paroi périphérique intérieure de l'élément annulaire intérieur, la paroi annulaire de renforcement intérieure principale étant agencée avec deux parties de surface de centrage périphériques pour entrer en contact et/ou se caler avec la paroi périphérique intérieure de l'élément annulaire intérieur,

    agencer en outre la paroi annulaire de renforcement intérieure principale avec une première ouverture périphérique centrale le long d'une partie de la périphérie de la paroi annulaire de renforcement intérieure pour permettre au conduit de connexion de passer à travers celle-ci,

    monter une bague d'étanchéité intérieure supérieure (51), une bague d'étanchéité intérieure supérieure (61), une bague d'étanchéité intérieure inférieure (52) et une bague d'étanchéité extérieure inférieure (62) ;

    la bague d'étanchéité intérieure supérieure étant montée sur l'élément annulaire intérieur au-dessus du plan central de rotation de raccord pivotant ;

    la bague d'étanchéité extérieure supérieure étant montée sur l'élément annulaire extérieur au-dessus du plan central de rotation de raccord pivotant avec sa surface périphérique intérieure à proximité immédiate de la surface périphérique extérieure de la bague d'étanchéité intérieure supérieure ;

    la bague d'étanchéité intérieure inférieure étant montée sur l'élément annulaire intérieur sous le plan central de rotation de raccord pivotant ;

    la bague d'étanchéité extérieure inférieure étant montée sur l'élément annulaire extérieur sous le plan central de rotation de raccord pivotant avec sa surface périphérique intérieure à proximité immédiate de la surface périphérique extérieure de la bague d'étanchéité intérieure inférieure ;

    dans lequel le raccord pivotant comprend un bague de renforcement supérieure extérieure secondaire (30a), un bague de renforcement inférieure extérieure secondaire (30b), un bague de renforcement supérieure intérieure secondaire (40a) et une bague de renforcement inférieure intérieur secondaire (40b),

    dans laquelle la bague de renforcement supérieur extérieure secondaire est agencée au-dessus du plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique intérieure une partie de surface de centrage périphérique secondaire pour entrer en contact et/ou se caler avec la paroi périphérique extérieure de la bague d'étanchéité extérieure supérieure ;

    agence la bague de renforcement inférieure extérieure secondaire sous le plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique intérieure une partie de surface de centrage périphérique secondaire pour entrer en contact et/ou se caler avec la paroi périphérique extérieure de la bague d'étanchéité extérieure inférieure ;

    la bague de renforcement supérieure intérieure secondaire est agencée au-dessus du plan central de rotation raccord pivotant et comprend au niveau d'une surface périphérique extérieure une partie de surface de centrage périphérique secondaire pour entrer en contact et/ou se caler avec la paroi périphérique intérieure de la bague d'étanchéité intérieure supérieure, et la bague de renforcement intérieure inférieure secondaire est agencée en dessous du plan central de rotation de raccord pivotant et comprend au niveau d'une surface périphérique extérieure une partie de surface de centrage périphérique secondaire pour entrer en contact et/ou se caler avec la paroi périphérique intérieure de la bague d'étanchéité interne inférieure.


     




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    Cited references

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    Patent documents cited in the description