DEVICE FOR SEALING JOINTS OF JOINTABLE PARTS OF A WATERBORNE SHIP HULL

Abstract

 This invention relates to shipbuilding engineering, in particular to mating parts (pontoons) of a waterborne large-capacity structure. Said invention makes it possible to increase the sealing reliability of the field joint of joinable parts of a waterborne ship hull and to reduce the production costs by excluding diving works. The invention is characterized in that a sealing device is provided with a metal container (9) mounted on the joinable part (8) of the ship hull, wherein the vertical wall (12) of the container (9) is embodied in such a way that it is projected outside the edge of the field joint (3) and the strip of an elastic sealing element (7) has a P-shaped cross-section formed by the conjunction of a circular cylinder and a rectangular strap.

Description

Field of the Invention

[0001] The invention relates to ship building engineering and can be used for mating parts (pontoons) of a waterborne large-capacity structure.

Background of the Invention

[0002] The device is known to seal joints of joinable parts of a waterborne hull, comprising a composite sealing plate constructed by two rigidly connected details one of which is rigidly attached to one of the hull joinable parts forming a variable cross-section stiffener, with the other being produced of elastic material, see Inventor's Certificate USSR No 1207887, IPC⁷ B63B 9/00, 35/44, 1984.

[0003] The sealing element of this device is made as a plate. When subjected to bending, as the experience shows, plates are separated within the areas where the horizontal sections of the hull joinable parts intersect the vertical or inclined ones producing holes through which the water flows into sealable chambers. Further, in the event of long-run towing a higher probability exists that the plate may be damaged because it protrudes beyond the joint edge.

[0004] Moreover, the device exists to seal the joinable parts of a waterborne hull, comprising angle bars mounted on the hull joinable parts, the strip of an elastic sealing element one end of which attached to the flange of one of said angle bars with the other secured to the hull with the air-filled pipe-shaped sealing element with gaskets one of which is against the flange of the second angle bar with the other meeting the hull, see Inventor's Certificate USSR No 488747, IPC⁷ B63B 9/00, 3/02, 1973.

[0005] Such a device can be installed only in underwater position using divers, with installation of three unfastened elements such as an elastic strip; gasket and pipe seal before air supply to the pipe seal being rather a problematic task.

Disclosure of the Invention

[0006] This invention makes it possible to increase the sealing reliability of the field joint of joinable parts of a waterborne large-capacity structure and to reduce the production costs by excluding diving works.

[0007] It is attained by applying the device for sealing joints of joinable parts of a waterborne hull, comprising an angle bar fitted to one of the hull joinable parts and interacting with the strip of an elastic sealing element; a metal container mounted on the second hull joinable parts, with one of the vertical box wall projecting outside the field joint edge and the strip of the elastic sealing element having a P-shaped cross-section formed by the conjunction of a circular cylinder and rectangular strap, with the sealing element attached to the flange of said angle bar.

Brief Description of the Drawings

[0008] 

Fig. 1 shows the components of the device separately attached to the joinable parts of the waterborne hull.

Fig. 2 shows the device in assembly with the joinable parts of the waterborne hull.

Preferred Embodiment of the Invention

[0009] The present device comprises the angle bar (2) attached to the hull part (1), arranged along the edge of the field joint (3) and supported with brackets (4). Connected with straps (5) and bolts (6) to the lower flange of said angle bar (2), the strip of elastic sealing element (7) has a P-shaped cross-section formed by the conjunction of the circular cylinder and rectangular strap, with the cylindrical section of the strip of elastic sealing element (7) being in contact with the vertical flange of angle bar 2.

[0010] Attached to the hull part (8) along the edge of field joint (3), the metal container (9) includes stiffeners 10 supported by brackets 11, with the free vertical wall (12) of the container (9) projecting outside the edge of field joint (3) which protects the strip of sealing element (7) against burning through while the field joint (3) being welded.

[0011] All the components of said device are mounted on building ways (not shown here), whereafter the hull parts (1) and (8) are launched and towed to a mating site.

[0012] The device operates in the following way.

[0013] The hull parts (1) and (8) are drawn together using known appliances such as chain tackles and turnbuckles (not shown here), with the vertical wall (12) of the container (9) contacting the strip of elastic sealing element (7) and keeping the strip cylindrical segment close against the vertical flange of angle bar (3), thus isolating the field joint (3) and chamber of the container (9) from seawater ingress.

[0014] The P-shaped cross-section of the strip of elastic sealing element (7) provides the reliable and uniform strip attachment to the joinable parts of the waterborne hull both within the horizontal segments and areas where the horizontal segments intersect the inclined and vertical segments.

[0015] The reliable fixing of the strip 7 also provides its retention in the event of long-run towing.

[0016] After tying and fixing the joinable hull parts the water is pumped out from the chamber of said container (9), whereupon the field joint (3) welded.

Industrial Applications

[0017] The present device for sealing the joints of joinable parts of waterborne hulls enables to increase the sealing reliability of the field joint and reduce the production costs by excluding diving works.

Claims

1. A device for sealing joints of joinable parts of a waterborne ship hull, comprising an angle bar fitted to one of the hull joinable parts and interacting with the strip of an elastic sealing element, characterized in that a metal container is mounted on another joinable part of the waterborne hull, wherein one vertical wall of said container is embodied in such a way that it is projected outside the edge of the field joint and the strip of the elastic sealing element has a P-shaped cross section formed by the conjunction of a circular cylinder and rectangular strap, with the strip of the sealing element attached to the flange of said angle bar.

Drawing