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EP 1 714 936 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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15.07.2009 Bulletin 2009/29 |
(22) |
Date of filing: 12.04.2006 |
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(51) |
International Patent Classification (IPC):
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(54) |
Lifting device for use in fitting and/or removing heavy flange bolts and method for
fitting such a flange bolt
Hebevorrichtung zum Anbringen und/oder Entfernen von schweren Flanschschrauben und
Verfahren zum Anbringen von einer solchen Flanschschraube
Dispositif de levage pour mettre en place et/ou enlever des vis lourdes pour brides
et procédé pour mettre en place une telle vis pour brides
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(84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE
SI SK TR |
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Priority: |
20.04.2005 NL 1028828
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Date of publication of application: |
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25.10.2006 Bulletin 2006/43 |
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Proprietor: Stork Industry Services B.V. |
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3544 AD Utrecht (NL) |
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Inventor: |
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- Bouman, Nico Willem
3191HK Hoogvliet (NL)
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Representative: Houben, Christiaan Hein Willem Frans |
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Exter Polak & Charlouis B.V.
P.O. Box 3241 2280 GE Rijswijk 2280 GE Rijswijk (NL) |
(56) |
References cited: :
EP-A- 0 250 638 EP-A- 0 811 547 FR-A- 2 692 508 US-A- 4 872 645
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EP-A- 0 424 247 DE-U1- 29 804 271 GB-A- 582 027 US-B1- 6 560 836
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- PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06, 30 April 1998 (1998-04-30) & JP 10 054146
A (CHUBU PLANT SERVICE:KK), 24 February 1998 (1998-02-24)
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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).
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[0001] The invention relates to a lifting device for use in fitting and removing heavy threaded
flange bolts in the case of a flange assembly consisting of two flanges lying opposite
each other and provided with bolt holes, and having a substantially vertical axis.
[0002] Flanged joints are often used in industrial plants, such as oil refineries, power
stations, chemical factories and the like in order to connect ends of pipes to each
other. In certain cases the flanges and the corresponding flange bolts can be of a
very large and heavy design. Fitting and removing the heavy flange bolts, which can
weigh up to 70 - 80 kg, is currently still often performed manually, since the use
of a crane is expensive and in many cases is even not possible because there is insufficient
hoisting space above the bolt hole where the threaded bolt is to be fitted or removed.
[0003] Manually fitting a heavy threaded flange bolt in the case of a flange assembly consisting
of two flanges lying opposite each other and provided with bolt holes, and having
a substantially vertical axis, is performed as follows. A first fitter inserts the
flange bolt from below into the corresponding bolt hole, generally from a crouching
position or down on his knees. He moves the flange bolt further upwards into the bolt
hole with both hands until the top end of the bolt is projecting with a number of
leads above the top flange, so that a second fitter can screw a nut onto the top end
of the bolt. Sometimes the nut does not screw smoothly onto the flange bolt, so that
the latter tends to turn with the nut. The first fitter then has to apply even more
effort to hold the bolt. In the case of very heavy flange bolts a lever beam is also
sometimes used to move the flange bolt upwards in the bolt hole.
[0004] Manually fitting and removing heavy flange bolts, which can be present in a relatively
large number (up to 24 or more) in one flanged joint, means a heavy load being placed
upon the fitters, and can also lead to unsafe situations.
[0005] The object of the invention is to make it easier to fit and remove heavy threaded
flange bolts in the case of a flange assembly consisting of two flanges lying opposite
each other and provided with bolt holes, and having a substantially vertical axis.
[0006] This object is achieved by a lifting device according to claim 1 and a method according
to claim 14.
[0007] The effort that has to be expended by the fitters is considerably reduced by making
use of the lifting device according to the invention and using the method according
to the invention. In certain cases only one fitter is now needed to fit or remove
a flange bolt. Furthermore, a flange bolt can be fitted or removed more quickly, and
the chance of dangerous situations arising is considerably reduced.
[0008] Preferred embodiments of the lifting device and method according to the invention
are described in the dependent claims.
[0009] It is remarked that
US 6.560.836B1 discloses a hand tool for the removal of bound bolts out of an engine shaft flange
assembly. After the nuts are loosened, the bolts are still bound in the engine shaft
flange assembly. The hand tool comprises two flanges, wherein a second flange is movable
relative to a first flange. In use the first flange is positioned stationary to the
engine shaft flange assembly and has extraction bolt housings abutting to the flange
assembly. The extraction bolt housings cover the bolts with a predefined play between
the housings and the bolts, which permits a relative movement of the bolts with respect
to the housings. The second flange of the hand tool is connected to U-shaped extractor
rods, which are placed on the free ends of the bound bolts to be extracted. The second
flange is engaged with a jack bolt. The free end of the jack bolt abuts to the first
flange of the hand tool. Furthermore, guide rods are provided to guide the movement
of the second flange relative to the first flange. Screwing up the jack bolt causes
a translation of the second flange of the hand tool together with the extractor rods
with respect to the first flange. This results in a pushing force on the bound bolts,
which will be pushed out the engine flange assembly and will be pushed into the extraction
bolt housings.
[0010] Thus, the hand tool of
US 6.560.836B1 is designed to remove bolts out of a engine flange assembly by pushing on the free
ends of the bolts with extractor rods. This purpose differs from the purpose of the
lifting device according to the invention. This hand tool is in fact unsuitable and
not arranged for the stated purpose of the invention to make it easier to fit and
remove heavy threaded flange bolts into or from a flange assembly. In the first place,
this hand tool misses a supporting part to support heavy bolts and to move them in
a vertical direction upwards into the flange assembly. Additionally, the components
of the hand tool, in particular the extraction bolt housings make it impossible to
reach the bolts for screwing a nut on them to finally fit the bolts in the flange
assembly. Consequently, in contrast to the lifting device according to the invention,
this hand tool cannot be used for supporting the weight of heavy flange bolts during
removal of these bolts from a flange assembly or during insertion and fitting of these
bolts into a flange assembly.
[0011] The invention will be explained in the description of an exemplary embodiment that
follows with reference to the drawing, in which:
Fig. 1 shows a view in cross-section (Fig. 1a) and a view in perspective and in cross-section
(Fig. 1b) of a flange assembly with a flange bolt and lifting device according to
the invention.
Figs. 2 to 8 show the successive steps of fitting a heavy flange bolt with the aid
of the lifting device according to the invention.
Fig. 1a shows in a view in cross-section, and Fig. 1b shows in a view in perspective
and in cross-section, a flange assembly with a flange bolt and a lifting device according
to the invention, in which the axis of the flange assembly is substantially vertical.
The flange assembly consists of two flanges 1 and 2 lying opposite each other and
one on top of the other. The bottom flange 1 is connected to a pipe end 3 by means
of a welded seam (not shown). Said welded seam is made in a V-shaped recess formed
by bevelled edges 3a and 1a respectively on the pipe end 3 and on a connecting part
1b of the bottom flange 1. The top flange 2 is designed as a closing flange. The top
flange 2 could, however, also be designed in the same way as the bottom flange 1 and
connected to a pipe end, in which case the flange assembly connects two pipe ends
to each other. The flanges 1 and 2 are provided with bolt holes 4 lying opposite each
other. The flanges are connected to each other by means of flange bolts 5 projecting
through the bolt holes 4, only one of which flange bolts is shown in Figs. 1a and
1b. The number of bolts connecting the two flanges 1 and 2 to each other can be relatively
large, for example 24 or more. Each of the flange bolts 5 is provided with a first
nut 6 and a second nut 7. However, it is also possible for a flange bolt 5 to be provided
with a fixed head instead of a first nut 6 on the end concerned.
[0012] The invention relates in particular to fitting and/or removing heavy flange bolts
5, which can have a weight of up to 70 - 80 kg, in the situation in which the axis
of the flange assembly is substantially vertical.
[0013] Figs. 1a and 1b further show a lifting device indicated in general by 8, which lifting
device is used for fitting and/or removing such heavy flange bolts 5.
[0014] The embodiment of the lifting device 8 according to the invention shown in Figs.
1a and 1b comprises a jack 9 in the form of a screw jack. The jack 9 comprises an
elongate housing 10 and a lead screw 11 which is rotatable in said housing, and outside
the housing is provided with a drive nut 12. The lead screw 11 can be turned with
the aid of an auxiliary tool that is applied to the drive nut 12. This auxiliary tool
can be a key or a crank by means of which the lead screw 11 is turned manually, or
it can be an electric or pneumatic rotating tool. The jack 9 further comprises a first
pressure plate 13 which is connected to the housing 10 and a second pressure plate
14 which is movable relative to said first pressure plate. The second pressure plate
14 can be moved relative to the first pressure plate 13 by means of the lead screw
11. The jack 9 in the exemplary embodiment shown is a commercially available jack
which is used in the automobile industry for fitting McPherson springs. However, the
jack can also be another type of jack.
[0015] The lifting device 8 further comprises a first supporting part 16, which is connected
to the first pressure plate 13 and extends in the transverse direction relative to
the axis of the jack 9, and a second pressure part 17, which is connected to the second
pressure plate 14 and extends in the transverse direction relative to the axis of
the jack. The first supporting part 16 is preferably connected in a detachable manner
by way of a first connecting part 18 to the first pressure plate 13, and the second
supporting part 17 is preferably connected in a detachable manner by means of a second
connecting part 19 to the second pressure plate 14. The connecting parts 18 and 19
are fixed on the pressure plates 13 and 14 by means of bolts 20. The first supporting
part 16 and the first connecting part 18 together form a substantially L-shaped part.
The second supporting part 17 and the second connecting part 19 likewise together
form a substantially L-shaped part. The supporting parts 16 and 17 are preferably
shaped like a fork. The first supporting part 16 is further provided with a plastic
disc 21. Said plastic disc is formed so as to be complementary to the fork shape of
the supporting part 16 in such a way that it can be pushed to fit in and around the
fork-shaped supporting part 16, and is subsequently also removable again, so that
it can be fitted as desired on and removed from the desired supporting part 16.
[0016] The second supporting part 17 is designed for placing between the two flanges 1 and
2 during use of the lifting device for fitting and/or removing heavy flange bolts,
and the first supporting part 16 with the plastic disc 21 is designed for placing
under a flange bolt 5 to be fitted and for supporting the latter.
[0017] The lengths in the vertical direction of the connecting parts 18 and 19 are the same
in Fig. 1. Depending on the dimensions of the flange bolt 5 and the flanges 1 and
2, the connecting parts 18, 19 of the L-shaped parts 16, 18 and 17, 19 respectively
can be longer or shorter, or can be of different lengths from each other.
[0018] In order to provide a lifting device 8 which is flexible in use in different situations
for different dimensions of the flange bolt 5 and of the flanges 1 and 2 (in particular
different flange thicknesses), a tool kit can be provided, consisting of a jack 9
and several L-shaped parts 16, 18 and 17, 19 respectively with different dimensions.
For example, it is possible to provide a tool kit consisting of a jack 9 and four
accompanying L-shaped attachments, two of which have a short connecting part 18, 19
and can be used as the L-shaped parts 16, 18 and 17, 19 respectively with a short
connecting part 18, 19, and the other two L-shaped attachments of which have a long
connecting part 18, 19 and can be used as the L-shaped parts 16, 18 and 17, 19 respectively
with a long connecting part 18.
[0019] In a certain situation two suitable L-shaped attachments can then be selected and
fitted by means of bolts 20 on the first pressure plate 13 and on the second pressure
plate 14 of the jack 9, in order to form a complete lifting device 8 which is suitable
in that situation. In this way different lifting devices 8 can be made with this tool
kit by combining a jack 8 with two short L-shaped attachments or with one short L-shaped
attachment and one long L-shaped attachment, or with two long L-shaped attachments,
which lifting devices are suitable for fitting or removing a flange assembly with
not so thick, moderately thick or rather thick flanges 1, 2 respectively with the
corresponding shorter or longer flange bolts 5.
[0020] The L-shaped attachments forming the L-shaped parts 16, 18 and 17, 19 respectively
can be made of steel. The L-shaped attachments form a considerable part of the weight
of the lifting device 8 and certainly also form a considerable part of the weight
of the tool kit, as described above. The L-shaped attachments can advantageously be
made of aluminium, so that a relatively light lifting device 8 or tool kit is produced.
[0021] The various steps in the process for fitting a heavy threaded flange bolt in the
case of a flange assembly consisting of two flanges lying opposite each other and
provided with bolt holes, and having a substantially vertical axis, with the aid of
the lifting device according to the invention are shown in Figures 2 to 8, in the
"a" figures a part of the flange assembly with flange bolt and lifting device being
shown in side view, while in the "b" figures a part of a flange assembly with flange
bolt and lifting device is shown in a perspective view from the top side and in cross-section.
[0022] Figs. 2a and 2b show the situation in which a closing flange 2 (top flange) is placed
on a flange 1 (bottom flange) connected to a vertically disposed pipe end 3. As mentioned
earlier, the flange 2 could also be connected to a pipe end (not shown) in the same
way as the flange 1. The bolt holes 4 in the flanges 1 and 2 lie opposite each other.
[0023] Figs 3a and 3b further show a flange bolt 5 to be fitted, having a first nut 6 screwed
onto it. Instead of the nut 6, the flange bolt 5 could also be provided with a fixed
head on the end concerned. The flange bolt 5 is inserted manually by a fitter from
below into the corresponding bolt hole 4 in the bottom flange 1.
[0024] As shown in Figs. 4a and 4b, the lifting device 8 according to the invention is then
placed. The supporting parts 16 and 17 are moved apart here. The second supporting
part 17 is placed between the flanges 1 and 2, and the first supporting part 16 with
the plastic disc 21 is placed under the flange bolt 5 to be fitted. The flange bolt
5 is now supported by the lifting device 8, so that the fitter who initially inserted
the flange bolt 5 into the corresponding bolt hole has his hands free. The lifting
device 8 can be fitted by the fitter who initially inserted the flange bolt 5 into
the corresponding bolt hole 4, or by a second fitter. Turning the lead screw 11 of
the jack 9 by means of an auxiliary tool (not shown) placed on the drive nut 12 of
the lead screw causes the two supporting parts 16 and 17 to move towards each other,
so that the flange bolt 5 is moved upwards into the corresponding bolt hole (arrow
22 in Figs. 4a, 4b and Figs. 5a, 5b).
[0025] In Figs. 5a and 5b the flange bolt 5 is moved further into the corresponding bolt
hole and the second nut 7 to be screwed onto the flange bolt 5 on the top side of
the top flange 2 is also shown. The flange bolt 5 is moved further upwards by turning
the lead screw 11 of the jack 9 (arrow 23 in Fig. 5b). In the course of this the flange
bolt 5 moves through between the legs of the fork-shaped second supporting part 17.
[0026] Figs. 6a and 6b show the situation in which the flange bolt 5 has moved so far up
that one or two leads of the flange bolt 5 extend above the top flange 2, as indicated
at 24. The two supporting parts 16 and 17 have now moved so far towards each other
that the two pressure plates 13 and 14 of the jack 9 are lying close to each other
or resting against each other. The second nut 7 can now be screwed onto the flange
bolt 5. The flange bolt 5 is supported on the plastic disc 21 provided in the fork-shaped
supporting part 16 and consequently undergoes a friction force which offers resistance
to slipping and turning, so that the flange bolt 5 is prevented from turning along
with the nut 7 when the latter is being screwed onto it. The situation shown in Figs.
6a and 6b corresponds substantially to the situation shown in Figs. 1a and 1b.
[0027] The second nut 7 is screwed further onto the flange bolt 5, so that the flange bolt
moves further upwards and comes away from the first supporting part 16 with plastic
disc 21. The lifting device 8 can now be removed, as shown in Figs. 7a and 7b.
[0028] Figs. 8a and 8b show the situation in which the flange bolt 5 with nuts 6 and 7 is
fitted in the flange assembly.
[0029] The operations described above must be carried out for each of the flange bolts 5
to be fitted in the bolt holes 4 of the flange assembly. The number of bolt holes
4 can be relatively large and can be up to 24 or more.
[0030] For the removal of a flange bolt 5 the operations described above are in principle
performed in reverse order.
[0031] The lifting device can be of a different design and, for example, comprise a different
type of jack. The supporting parts 16, 17 could also be designed in such a way that
they can be connected directly (i.e. without the connecting parts 18, 19) to the pressure
plates 13, 14.
1. Lifting device (8) for use in fitting and removing heavy threaded flange bolts (5)
in a flange assembly consisting of two flanges (1, 2) lying opposite each other and
provided with bolt holes (4), and having a substantially vertical axis, characterized in that, it comprises a jack (9) with a first part (13) and a second part (14) which is movable
relative to the first part (13), and means for moving the first part (13) and the
second part (14) relative to each other, a first supporting part (16) which is designed
for placing under a flange bolt (5) to be fitted or removed and for supporting the
latter, connected to the first part (13) and extending in the transverse direction
relative to the axis of the jack (9), and a second supporting part (17), connected
to the second part (14) and extending in the transverse direction relative to the
axis of the jack (9).
2. Lifting device according to claim 1, in which the jack (9) is a screw jack with a
lead screw (11) extending through the second part, for moving the second part (14)
relative to the first part (13).
3. Lifting device according to claim 1 or 2, in which the supporting parts (16, 17) are
detachably connected to the first and second parts (13, 14) respectively of the jack
(9).
4. Lifting device according to one or more of the claims 1 - 3, in which each of the
two supporting parts (16, 17) is shaped like a fork.
5. Lifting device according to one or more of the claims 1 - 4, in which one of the two
supporting parts (16, 17) is provided with a plastic disc (21).
6. Lifting device according to one or more of the claims 1 - 5, in which each of the
two supporting parts (16, 17) is connected, by means of a connecting part (18, 19)
extending substantially parallel to the axis of the jack (9), to the first and second
parts (13, 14) respectively of the jack (9), in such a way that the supporting parts
(16, 17) together with the connecting parts (18, 19) form substantially L-shaped parts.
7. Lifting device according to claim 6, in which the L-shaped part is made of aluminium.
8. Tool kit for fitting and removing heavy threaded flange bolts (5) in a flange assembly,
comprising a jack (9) with a first part (13) and a second part (14) which is movable
relative to the first part (13), and means (12) for moving the first part (13) and
the second part (14) relative to each other, and at least two substantially L-shaped
parts which are connected or are to be connected detachably to the first and the second
parts (13, 14) and each consist of a supporting part (16, 17), which is designed for
placing under a flange bolt (5) to be fitted or removed and for supporting the latter
for fitting or removing the heavy flange bolt (5), and a connecting part (18, 19)
extending substantially transversely to the supporting part (16, 17), which connecting
part (18, 19) can be connected or is connected to the first or the second part (13,
14) of the jack (9).
9. Tool kit according to claim 8, in which the jack (9) is a screw jack with a lead screw
(11) extending through the second part (14), for moving the second part (14) relative
to the firstpart (13).
10. Tool kit according to claim 8 or 9, comprising at least three substantially L-shaped
parts, in which the dimensions of the L-shaped parts, in particular the lengths of
the connecting parts (18, 19), are different from each other.
11. Tool kit according to one or more of the claims 8 - 10, in which each of the supporting
parts (16, 17) is shaped like a fork.
12. Tool kit according to one or more of the claims 8 - 11, in which at least one of the
supporting parts (16, 17) is provided with a plastic disc (21).
13. Tool kit according to one or more of the claims 8 - 12, in which the L-shaped parts
are made of aluminium.
14. Method for fitting a heavy threaded flange bolt (5) in the case of a flange assembly
consisting of two flanges (1, 2) lying opposite each other and provided with bolt
holes (4), and having a substantially vertical axis, with the aid of a lifting device
(8) according to one of claims 1 - 7, comprising the following steps:
- manually inserting a flange bolt (5) provided with a first nut (6) or head from
below into a bolt hole (4) of the bottom flange (11), the first nut (6) or the head
being on the bottom end part of the flange bolt (5);
- placing the lifting device (8) on the flange assembly in such a way that one of
its supporting parts (17) is placed between the two flanges (1, 2), and the other
supporting part (16) is placed under the flange bolt (5) placed in the bolt hole (4)
and supports the flange bolt (5);
- operating the jack (9) in such a way that the supporting part (16) placed under
the flange bolt (5) moves upwards with the flange bolt (5) supported on it until the
flange bolt (5) is projecting with at least one lead above the top flange (2);
- screwing a second nut (7) onto the part of the flange bolt (5) projecting above
the top flange (2);
- further tightening the second nut (7); and
- removing the lifting device (8) from the flange assembly.
15. Method according to claim 14, in which if the jack (9) is in the form of a screw jack
with a lead screw (11), in order to move the flange bolt (5) upwards, the lead screw
is turned manually with the aid of a key or crank, or with an electric or pneumatic
rotating tool.
1. Hebevorrichtung (8) zur Verwendung beim Anbringen und Entfernen schwerer Gewindeflanschbolzen
(5) in einer Flanschanordnung, die aus zwei einander gegenüberliegenden Flanschen
(1, 2) gebildet ist und mit Bolzenlöchern (4) versehen ist und im Wesentlichen eine
vertikale Achse aufweist, dadurch gekennzeichnet, dass sie einen Heber (9) mit einem ersten Teil (13) und einem zweiten Teil (14), das relativ
zu dem ersten Teil (13) bewegbar ist, und Mittel zum Bewegen des ersten Teils (13)
und des zweiten Teils (14) relativ zueinander, ein erstes Stützteil (16), das zum
Anbringen unter einem anzubringenden oder zu entfernenden Flanschbolzen (5) und zum
Stützen des Letzteren ausgelegt ist, das mit dem ersten Teil (13) verbunden ist und
sich in Querrichtung bezüglich der Achse des Hebers (9) erstreckt, und ein zweites
Stützteil (17) aufweist, das mit dem zweiten Teil (14) verbunden ist und sich bezüglich
der Achse des Hebers (9) in Querrichtung erstreckt.
2. Hebevorrichtung nach Anspruch 1, wobei der Heber (9) eine Schraubenwinde mit einer
Gewindespindel (11), die sich durch das zweite Teil erstreckt, zum Bewegen des zweiten
Teils (14) relativ zu dem ersten Teil (13) ist.
3. Hebevorrichtung nach Anspruch 1 oder 2, wobei die Stützteile (16, 17) lösbar mit den
ersten beziehungsweise zweiten Teilen (13, 14) des Hebers (9) verbunden sind.
4. Hebevorrichtung nach einem oder mehreren der Ansprüche 1 - 3, wobei jedes der zwei
Stützteile (16, 17) wie eine Gabel ausgebildet ist.
5. Hebevorrichtung nach einem oder mehreren der Ansprüche 1 - 4, wobei eines der zwei
Stützteile (16, 17) mit einer Kunststoffscheibe (21) versehen ist.
6. Hebevorrichtung nach einem oder mehreren der Ansprüche 1 - 5, wobei jeder der zwei
Stützteile (16, 17) mittels eines Verbindungsteils (18, 19), das sich im Wesentlichen
parallel zu der Achse des Hebers (9) erstreckt, mit den ersten beziehungsweise zweiten
Teilen (13, 14) des Hebers (9) derart verbunden ist, dass die Stützteile (16, 17)
zusammen mit den Verbindungsteilen (18, 19) im Wesentlichen L-förmige Teile ausbilden.
7. Hebevorrichtung nach Anspruch 6, wobei das L-förmige Teil aus Aluminium hergestellt
ist.
8. Werkzeug zum Anbringen und Entfernen schwerer Gewindeflanschbolzen (5) in einer Flanschanordnung,
aufweisend einen Heber (9) mit einem ersten Teil (13) und einem zweiten Teil (14),
das relativ zu dem ersten Teil (13) bewegbar ist, und Mittel (12) zum Bewegen des
ersten Teils (13) und des zweiten Teils (14) relativ zueinander, und wenigstens zwei
im Wesentlichen L-förmige Teile, die mit den ersten und zweiten Teilen (13, 14) lösbar
verbunden sind oder zu verbinden sind und jeweils aus einem Stützteil (16, 17) zusammengesetzt
sind, das zum Anbringen unter einem anzubringenden oder zu entfernenden Flanschbolzen
(5) und zum Stützen des Letzteren zum Anbringen oder Entfernen des schweren Flanschbolzens
(5) ausgelegt ist, und ein Verbindungsteil (18, 19), das sich im Wesentlichen quer
zu dem Stützteil (16, 17) erstreckt, wobei das Verbindungsteil (18, 19) mit dem ersten
oder dem zweiten Teil (13, 14) des Hebers (9) verbunden sein kann oder verbunden ist.
9. Werkzeug nach Anspruch 8, wobei der Heber (9) eine Schraubenwinde mit einer Gewindespindel
(11), die sich durch das zweite Teil (14) erstreckt, zum Bewegen des zweiten Teils
(14) relativ zu dem ersten Teil (13) ist.
10. Werkzeug nach Anspruch 8 oder 9, aufweisend wenigstens drei im Wesentlichen L-förmige
Teile, wobei die Abmessungen der L-förmigen Teile, insbesondere die Längen der Verbindungsteile
(18, 19), voneinander verschieden sind.
11. Werkzeug nach einem oder mehreren der Ansprüche 8 - 10, wobei jedes der Stützteile
(16, 17) wie eine Gabel ausgebildet ist.
12. Werkzeug nach einem oder mehreren der Ansprüche 8 - 11, wobei wenigstens eines der
Stützteile (16, 17) mit einer Kunststoffscheibe (21) versehen ist.
13. Werkzeug nach einem oder mehreren der Ansprüche 8 - 12, wobei die L-förmigen Teile
aus Aluminium hergestellt sind.
14. Verfahren zum Anbringen eines schweren Gewindeflanschbolzens (5) in dem Fall einer
Flanschanordnung, die aus zwei einander gegenüberliegenden Flanschen (1, 2) gebildet
ist und mit Bolzenlöchern (4) versehen ist und die im Wesentlichen eine vertikale
Achse aufweist, mit Hilfe einer Hebevorrichtung (8) nach einem der Ansprüche 1 - 7,
aufweisend die folgenden Schritte:
- Manuelles Einführen eines Flanschbolzens (5), der mit einer ersten Mutter (6) oder
einem Kopf versehen ist, von unten in ein Bolzenloch (4) des unteren Flansches (11),
wobei sich die erste Mutter (6) oder der Kopf an dem unteren Endteil des Flanschbolzens
(5) befindet;
- Anbringen der Hebevorrichtung (8) an die Flanschanordnung derart, dass eines ihrer
Stützteile (17) zwischen die zwei Flansche (1, 2) angeordnet wird und das andere Stützteil
(16) unter dem in dem Bolzenloch (4) angeordneten Flanschbolzen (5) angeordnet wird
und den Flanschbolzen (5) stützt;
- Bedienen des Hebers (9) derart, dass sich das unter dem Flanschbolzen (5) angebrachte
Stützteil (16) mit dem darauf gestützten Flanschbolzen (5) nach oben bewegt bis der
Flanschbolzen (5) wenigstens mit einer Gewindesteigung über dem oberen Flansch (2)
herausragt;
- Schrauben einer zweiten Mutter (7) auf den Teil des Flanschbolzens (5), der über
dem oberen Flansch (2) herausragt;
- Ferner Anziehen der zweiten Mutter (7); und
- Entfernen der Hebevorrichtung (8) von der Flanschanordnung.
15. Verfahren nach Anspruch 14, wobei, wenn der Heber (9) in Gestalt einer Schraubenwinde
mit einer Gewindespindel (11) ist, die Gewindespindel manuell mit Hilfe eines Schlüssels
oder einer Kurbel oder mit einem elektrischen oder pneumatischen Drehwerkzeug gedreht
wird, um den Flanschbolzen (5) nach oben zu bewegen.
1. Dispositif de levage (8) destiné à être utilisé lors de l'assemblage et du retrait
de boulons de bride (5) filetés lourds dans un ensemble de brides consistant en deux
brides (1, 2) se trouvant l'une en face de l'autre et pourvues de trous de boulon
(4), et comportant un axe sensiblement vertical, caractérisé en ce qu'il comprend un vérin (9) avec une première partie (13) et une deuxième partie (14)
qui est mobile par rapport à la première partie (13), et des moyens pour déplacer
la première partie (13) et la deuxième partie (14) l'une par rapport à l'autre, une
première partie de support (16) qui est conçue pour être placée sous un boulon de
bride (5) à assembler ou à retirer et pour supporter le susdit, reliée à la première
partie (13) et s'étendant dans la direction transversale par rapport à l'axe du vérin
(9), et une deuxième partie de support (17), reliée à la deuxième partie (14) et s'étendant
dans la direction transversale par rapport à l'axe du vérin (9).
2. Dispositif de levage selon la revendication 1, dans lequel le vérin (9) est un vérin
à vis avec une vis mère (11) s'étendant à travers la deuxième partie, pour déplacer
la deuxième partie (14) par rapport à la première partie (13).
3. Dispositif de levage selon la revendication 1 ou 2, dans lequel les parties de support
(16, 17) sont respectivement reliées de manière détachable aux première et deuxième
parties (13, 14) du vérin (9).
4. Dispositif de levage selon une ou plusieurs des revendications 1 à 3, dans lequel
chacune des deux parties de support (16, 17) a la forme d'une fourche.
5. Dispositif de levage selon une ou plusieurs des revendications 1 à 4, dans lequel
l'une des deux parties de support (16, 17) est pourvue d'un disque (21) en matière
plastique.
6. Dispositif de levage selon une ou plusieurs des revendications 1 à 5, dans lequel
chacune des deux parties de support (16, 17) est reliée, au moyen d'une partie de
liaison (18, 19) s'étendant sensiblement parallèlement à l'axe du vérin (9), aux première
et deuxième parties (13, 14) respectivement du vérin (9), de manière à ce que les
parties de support (16, 17) avec les parties de liaison (18, 19) forment des parties
sensiblement en forme de L.
7. Dispositif de levage selon la revendication 6, dans lequel la partie en forme de L
est constituée d'aluminium.
8. Outillage pour assembler et retirer des boulons de bride (5) filetés lourds d'un ensemble
de brides, comprenant un vérin (9) avec une première partie (13) et une deuxième partie
(14) qui est mobile par rapport à la première partie (13), et des moyens (12) pour
déplacer la première partie (13) et la deuxième partie (14) l'une par rapport à l'autre,
et au moins deux parties sensiblement en forme de L qui sont reliées ou doivent être
reliées de manière détachable aux première et deuxième parties (13, 14) et consistant
chacune en une partie de support (16, 17), qui est conçue pour être placée sous un
boulon de bride (5) à assembler ou retirer et pour supporter le susdit pour assembler
ou retirer le boulon de bride (5) lourd, et une partie de liaison (18, 19) s'étendant
sensiblement transversalement à la partie de support (16, 17), laquelle partie de
liaison (18, 19) peut être reliée ou est reliée à la première ou à la deuxième partie
(13, 14) du vérin (9).
9. Outillage selon la revendication 8, dans lequel le vérin (9) est un vérin à vis avec
une vis mère (11) s'étendant à travers la deuxième partie (14), pour déplacer la deuxième
partie (14) par rapport à la première partie (13).
10. Outillage selon la revendication 8 ou 9, comprenant au moins trois parties sensiblement
en forme de L, dans lequel les dimensions des parties en forme de L, en particulier
les longueurs des parties de liaison (18, 19), sont différentes les unes des autres.
11. Outillage selon une ou plusieurs des revendications 8 à 10, dans lequel chacune des
parties de support (16, 17) a la forme d'une fourche.
12. Outillage selon une ou plusieurs des revendications 8 à 11, dans lequel au moins l'une
des parties de support (16, 17) est pourvue d'un disque (21) en matière plastique.
13. Outillage selon une ou plusieurs des revendications 8 à 12, dans lequel les parties
en forme de L sont réalisées en aluminium.
14. Procédé pour assembler un boulon de bride (5) fileté lourd dans le cas d'un ensemble
de brides consistant en deux brides (1, 2) se trouvant l'une en face de l'autre et
pourvues de trous de boulon (4), et ayant un axe sensiblement vertical, au moyen d'un
dispositif de levage (8) selon l'une des revendications 1 à 7, comprenant les étapes
suivantes consistant à :
- insérer manuellement un boulon de bride (5) pourvu d'un premier écrou (6) ou d'une
tête à partir du dessous dans un trou de boulon (4) de la bride inférieure (11), le
premier écrou (6) ou la tête se trouvant sur la partie d'extrémité inférieure du boulon
de bride (5) ;
- placer le dispositif de levage (8) sur l'ensemble de brides de manière à ce que
l'une de ses parties de support (17) soit placée entre les deux brides (1, 2), et
que l'autre partie de support (16) soit placée sous le boulon de bride (5) placé dans
le trou de boulon (4) et supporte le boulon de bride (5) ;
- actionner le vérin (9) de manière à ce que la partie de support (16) placée sous
le boulon de bride (5) se déplace vers le haut avec le boulon de bride (5) supporté
sur celle-ci jusqu'à ce que le boulon de bride (5) fasse saillie d'au moins un pas
au-dessus de la bride supérieure (2) ;
- visser un deuxième écrou (7) sur la partie du boulon de bride (5) faisant saillie
au-dessus de la bride supérieure (2);
- serrer davantage le deuxième écrou (7) ; et
- retirer le dispositif de levage (8) de l'ensemble de brides.
15. Procédé selon la revendication 14, dans lequel, si le vérin (9) est sous la forme
d'un vérin à vis avec une vis mère (11), afin de déplacer le boulon de bride (5) vers
le haut, la vis mère est tournée manuellement au moyen d'une clé ou d'une manivelle,
ou par un outil rotatif électrique ou pneumatique.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description