CN113775843A

CN113775843A - LNG ship gas double-wall pipe connecting device

Info

Publication number: CN113775843A
Application number: CN202110852448.6A
Authority: CN
Inventors: 刘学军
Original assignee: Shanghai Waigaoqiao Shipbuilding Co Ltd
Current assignee: Shanghai Waigaoqiao Shipbuilding Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-12-10
Anticipated expiration: 2041-07-27
Also published as: CN113775843B

Abstract

The invention relates to the technical field of LNG ships, and discloses a gas double-wall pipe connecting device of an LNG ship, which comprises: the sealing structure comprises an outer pipe body, an inner pipe body, a first sealing boss and a second sealing boss, wherein sealing grooves are formed in opposite surfaces of the first sealing boss and the second sealing boss, and a fireproof sealing gasket is movably connected inside the sealing grooves. This LNG ship gas double-walled pipe connecting device, through setting up positioning mechanism, supporting mechanism, first welded pipe and second welded pipe, weld two outer body that need connect respectively on the terminal surface of first welded pipe and second welded pipe, interior body is through the positioning mechanism in the first welded pipe after pre-fixing, cup joint second welded pipe and supporting mechanism on the surface of interior body, make interior body and outer body relatively fixed after the installation, prevent to take place the displacement, supporting mechanism's solid fixed ring passes through the inner wall fixed connection of connecting rod and outer body simultaneously, reserve the ventilation space, avoid the air volume not enough, improve the ventilation effect.

Description

LNG ship gas double-wall pipe connecting device

Technical Field

The invention relates to the technical field of LNG ships, in particular to a gas double-wall pipe connecting device for an LNG ship.

Background

The liquefied natural gas carrier, referred to as an LNG carrier for short, is a "ship" specially used for transporting liquefied natural gas, and the structural form of the cargo tank can be divided into an independent storage tank type in which a storage tank having a cylindrical shape, a tank shape, a spherical shape, or the like is placed in the ship and a membrane type in which a double-shell structure is adopted, and an inner shell is a bearing shell of the cargo tank.

When carrying the gas, pipeline after getting into the cabin adopts the structure of double-walled pipe, and set up the air exhauster and carry out mechanical ventilation in double-walled pipe inside and outside pipe annular space, in order to avoid the gas to leak the inside to the cabin, a double-walled pipe for the gas pipeline comprises inner tube and outer tube, flange joint is adopted mostly to inner tube and outer union coupling, the ventilation of double-walled pipe junction is realized through the ventilation hole, but often the air volume is not enough, influence ventilation effect, and the outer union coupling department of double-walled pipe belongs to the position of easily taking place the damage in the pipeline, if take place the damage easily to cause the gas to leak, cause the incident.

Disclosure of the invention

Aiming at the defects of the prior art, the invention provides a novel gas double-wall pipe connecting device for an LNG ship, and solves the problems mentioned in the background.

The invention provides the following technical scheme: LNG ship gas double-walled pipe connecting device includes: the sealing structure comprises an outer pipe body, an inner pipe body, a first sealing boss and a second sealing boss, wherein sealing grooves are formed in opposite surfaces of the first sealing boss and the second sealing boss, a fireproof sealing gasket is movably connected inside the sealing grooves, a first welding pipe and a second welding pipe are respectively arranged on end surfaces, far away from the sealing grooves, of the first sealing boss and the second sealing boss, mounting rings are movably sleeved on the surfaces of the first welding pipe and the second welding pipe, protective pipes are fixedly connected to the end surfaces of the mounting rings, movably sleeved on the surface of the outer pipe body, a fixing mechanism is arranged at one ends, far away from the mounting rings, of the protective pipes, a positioning mechanism is arranged on the inner wall of the first welding pipe, a supporting mechanism is arranged on the inner wall of the second welding pipe, the positioning mechanism and the supporting mechanism are movably connected to the surface of the inner pipe body, and threaded holes are formed in the surfaces of the mounting rings, the first sealing boss and the second sealing boss, the mounting ring, the first sealing boss and the second sealing boss are fixedly mounted through bolts.

Preferably, fixed establishment includes the external screw thread pipe, the one end fixedly connected with clamp splice of external screw thread pipe, the quantity of clamp splice is two, two the clamp splice uses the central horizontal plane through the protection tube to set up as the symmetry, the surperficial threaded connection of external screw thread pipe has the internal thread pipe, the inner wall of internal thread pipe is provided with the extrusion ring, the inclined plane of extrusion ring and the inclined plane swing joint of clamp splice.

Preferably, positioning mechanism includes die-pin, bracket, flexible subassembly and briquetting, die-pin fixed connection is at the inner wall of first welding pipe, bracket fixed connection is at the top of die-pin, the briquetting is located the top of bracket, the equal fixedly connected with cushion of inner wall of bracket and briquetting, briquetting fixed connection is at the flexible end of flexible subassembly, the stiff end fixed connection of flexible subassembly is at the inner wall of first welding pipe.

Preferably, flexible subassembly includes fixed pipe, spring and gag lever post, the spring setting is in the inside of fixed pipe, gag lever post fixed connection is in the one end of spring, gag lever post sliding connection is at the inner wall of fixed pipe.

Preferably, the supporting mechanism comprises a fixing ring and a connecting rod, the connecting rod is fixedly connected to the surface of the fixing ring, and one end of the connecting rod, far away from the fixing ring, is fixedly connected with the inner wall of the second welding pipe.

Preferably, the number of the connecting rods is four, and the four connecting rods are distributed in an annular array by taking the circle center of the fixing ring as the array center.

Preferably, the inner wall of the fixing ring is fixedly connected with a rubber pad, the inner wall of the rubber pad is provided with anti-skid lines, and the inner wall of the rubber pad and the surface of the inner pipe body are arranged.

Preferably, the surface of the second sealing boss is fixedly connected with a sleeve, a sealing ring is embedded in the inner wall of the sleeve, and the inner wall of the sealing ring is movably connected with the surface of the first sealing boss.

Preferably, the surface of the first sealing boss is fixedly connected with a connecting ring, the end face of the connecting ring is provided with an inserting groove, the end face of the sleeve is fixedly connected with an inserting ring, and the inserting ring is inserted into the inner wall of the inserting groove.

Compared with the prior art, the novel solar cell panel has the following beneficial effects:

1. this LNG ship gas double-walled pipe connecting device, through setting up positioning mechanism, supporting mechanism, first welded pipe and second welded pipe, weld two outer body that need connect respectively on the terminal surface of first welded pipe and second welded pipe, interior body is through the positioning mechanism in the first welded pipe after pre-fixing, cup joint second welded pipe and supporting mechanism on the surface of interior body, make interior body and outer body relatively fixed after the installation, prevent to take place the displacement, supporting mechanism's solid fixed ring passes through the inner wall fixed connection of connecting rod and outer body simultaneously, reserve the ventilation space, avoid the air volume not enough, improve the ventilation effect.

2. This LNG ship gas double-walled pipe connecting device, through setting up the protection tube, external thread pipe, the clamp splice, internal thread pipe and extrusion ring, the protection tube cup joints and protects at outer body welded tip, rotates the internal thread pipe simultaneously, the internal thread pipe drives extrusion ring extrusion clamp splice, compresses tightly two clamp splices on the surface of outer body, the coupling end of outer body is fixed, improve the stability of the junction of outer body, avoid the junction of outer body impaired, reached the effect that prevents the gas leakage.

3. This LNG ship gas double-walled pipe connecting device, through setting up the fire prevention sealed pad, sleeve pipe and sealing ring, the inner wall of first sealed boss and the sealed boss junction of second carries out the first layer through the sealed pad of fire prevention and seals, when first sealed boss passes through bolt and the sealed boss fixed mounting of second, the sealed boss of second drives sleeve pipe and sealing ring motion, the sealing ring cup joints the surface at first sealed boss, the inner wall of sealing ring pastes with the tight looks in surface of first sealed boss and the sealed boss of second respectively, the sleeve pipe carries on spacingly to the position of sealing ring, it is sealed to carry out the second floor through sleeve pipe and sealing ring, the leakproofness of outer body junction has been improved, avoid the gas to leak from outer body junction.

Drawings

FIG. 1 is a schematic perspective view of the novel structure of the present invention;

FIG. 2 is a schematic side sectional view of the novel structure of the present invention;

FIG. 3 is a schematic view of a partially enlarged structure of the novel positioning mechanism of the present invention;

FIG. 4 is a schematic diagram of the novel explosive structure of the present invention;

FIG. 5 is a schematic diagram of a novel explosive side-sectional structure of the present invention;

FIG. 6 is a schematic structural view of a first novel sealing boss of the present invention;

fig. 7 is a schematic structural view of a second novel sealing boss of the present invention.

In the figure: 1. an outer tubular body; 2. an inner tube body; 3. a first seal boss; 4. a second seal boss; 5. a sealing groove; 6. a fire-resistant sealing gasket; 7. a first welded pipe; 8. a second welded tube; 9. a mounting ring; 10. protecting the tube; 11. a fixing mechanism; 111. an externally threaded tube; 112. a clamping block; 113. an internally threaded tube; 114. an extrusion ring; 12. a positioning mechanism; 121. a support rod; 122. a bracket; 123. a telescoping assembly; 124. briquetting; 13. a support mechanism; 131. a fixing ring; 132. a connecting rod; 14. a fixed tube; 15. a spring; 16. a limiting rod; 17. a rubber pad; 18. a sleeve; 19. a seal ring; 20. a connecting ring; 21. inserting grooves; 22. and (4) inserting and connecting a ring.

Detailed Description

The technical solutions in the novel embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the novel embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the novel embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the novel concept, are within the scope of the novel concept of the present invention.

Referring to fig. 1 to 7, the gas double-wall pipe coupling apparatus for an LNG ship includes: the pipe joint comprises an outer pipe body 1, an inner pipe body 2, a first sealing boss 3 and a second sealing boss 4, wherein the opposite surfaces of the first sealing boss 3 and the second sealing boss 4 are respectively provided with a sealing groove 5, the inside of the sealing groove 5 is movably connected with a fireproof sealing gasket 6, the end surfaces of the first sealing boss 3 and the second sealing boss 4 far away from the sealing groove 5 are respectively provided with a first welding pipe 7 and a second welding pipe 8, the surfaces of the first welding pipe 7 and the second welding pipe 8 are both movably sleeved with a mounting ring 9, the end surface of the mounting ring 9 is fixedly connected with a protection pipe 10, the protection pipe 10 is movably sleeved on the surface of the outer pipe body 1, one end of the protection pipe 10 far away from the mounting ring 9 is provided with a fixing mechanism 11, the inner wall of the first welding pipe 7 is provided with a positioning mechanism 12, the inner wall of the second welding pipe 8 is provided with a supporting mechanism 13, the positioning mechanism 12 and the supporting mechanism 13 are both movably connected on the surface of the inner pipe body 2, threaded holes are formed in the surfaces of the mounting ring 9, the first sealing boss 3 and the second sealing boss 4, and the mounting ring 9, the first sealing boss 3 and the second sealing boss 4 are fixedly mounted through bolts.

Wherein; the fixing mechanism 11 comprises an external thread pipe 111, one end of the external thread pipe 111 is fixedly connected with two clamping blocks 112, the number of the clamping blocks 112 is two, the two clamping blocks 112 are symmetrically arranged by taking a central horizontal plane passing through the protection pipe 10 as a symmetrical plane, the surface of the external thread pipe 111 is in threaded connection with an internal thread pipe 113, the inner wall of the internal thread pipe 113 is provided with an extrusion ring 114, the inclined plane of the extrusion ring 114 is movably connected with the inclined plane of the clamping blocks 112, the internal thread pipe 113 is rotated, the internal thread pipe 113 drives the extrusion ring 114 to extrude the clamping blocks 112, the two clamping blocks 112 are tightly pressed on the surface of the outer pipe body 1, the connecting end part of the outer pipe body 1 is fixed, and the stability of the connecting part of the outer pipe body 1 is improved.

Wherein; the positioning mechanism 12 comprises a supporting rod 121, a bracket 122, a telescopic component 123 and a pressing block 124, the supporting rod 121 is fixedly connected to the inner wall of the first welding pipe 7, the bracket 122 is fixedly connected to the top of the supporting rod 121, the pressing block 124 is located above the bracket 122, the inner walls of the bracket 122 and the pressing block 124 are both fixedly connected with cushions, the pressing block 124 is fixedly connected to the telescopic end of the telescopic component 123, the fixed end of the telescopic component 123 is fixedly connected to the inner wall of the first welding pipe 7, the telescopic component 123 comprises a fixed pipe 14, a spring 15 and a limiting rod 16, the spring 15 is arranged inside the fixed pipe 14, the limiting rod 16 is fixedly connected to one end of the spring 15, the limiting rod 16 is slidably connected to the inner wall of the fixed pipe 14, the pressing block 124 moves upwards, the pressing block 124 pushes the limiting rod 16 to move, the limiting rod 16 extrudes the spring 15, the inner pipe body 2 is placed on the bracket 122 and is in contact with the cushions arranged on the inner wall of the bracket 122, and the pressing block 124 is loosened, spring 15 stretches back, promotes gag lever post 16 and removes, and gag lever post 16 promotes briquetting 124 and removes, makes briquetting 124 press in the surface of interior body 2, fixes a position and fixes in advance the position of interior body 2 through bracket 122 and briquetting 124, and interior body 2 is fixed in advance through positioning mechanism 12 in the first welded pipe 7, avoids interior body 2 to remove at will in the installation.

Wherein; the supporting mechanism 13 includes a fixing ring 131 and four connecting rods 132, the connecting rods 132 are fixedly connected to the surface of the fixing ring 131, one end of each connecting rod 132, which is far away from the fixing ring 131, is fixedly connected to the inner wall of the second welding pipe 8, the number of the connecting rods 132 is four, the four connecting rods 132 are distributed in an annular array with the circle center of the fixing ring 131 as the array center, the inner wall of the fixing ring 131 is fixedly connected to a rubber pad 17, the inner wall of the rubber pad 17 is provided with anti-skid threads, the inner wall of the rubber pad 17 is connected to the surface of the inner pipe 2, the fixing ring 131 is aligned to the inner pipe 2, the fixing ring 131 is sleeved on the surface of the inner pipe 2, the rubber pad 17 inside the fixing ring 131 is in contact with the surface of the inner pipe 2 to prevent the fixing ring 131 from being in hard contact with the surface of the inner pipe 2, the inner pipe 2 is prevented from being damaged, the outer pipe 1 is fixedly connected to the fixing ring 131 through the connecting rods 132, and the position of the fixing ring 131 is fixed to fix the position of the inner pipe 2, make the interior body 2 after the installation and outer body 1 relatively fixed, prevent to take place relative displacement, the solid fixed ring 131 of supporting mechanism 13 passes through connecting rod 132 and outer body 1's inner wall fixed connection simultaneously, reserves the ventilation space, avoids the air volume not enough.

Wherein; the fixed surface of the second sealed boss 4 is connected with a sleeve 18, the inner wall of the sleeve 18 is inlaid with a sealing ring 19, the inner wall of the sealing ring 19 is movably connected with the surface of the first sealed boss 3, when the first sealed boss 3 is fixedly installed with the second sealed boss 4 through a bolt, the second sealed boss 4 drives the sleeve 18 and the sealing ring 19 to move, the sealing ring 19 is sleeved on the surface of the first sealed boss 3, the inner wall of the sealing ring 19 is tightly attached to the surfaces of the first sealed boss 3 and the second sealed boss 4 respectively, and the outer surface of the joint of the first sealed boss 3 and the second sealed boss 4 is sealed.

Wherein; the surface of the first sealing boss 3 is fixedly connected with a connecting ring 20, the end face of the connecting ring 20 is provided with an inserting groove 21, the end face of the sleeve 18 is fixedly connected with an inserting ring 22, the inserting ring 22 is inserted into the inner wall of the inserting groove 21, and the inserting ring 22 is inserted into the inner wall of the inserting groove 21, so that the tightness between the sleeve 18 and the connecting ring 20 is improved.

The working principle is that two outer tubes 1 to be connected are respectively welded on the end faces of a first welding tube 7 and a second welding tube 8, a pressing block 124 of a positioning mechanism 12 is moved upwards, the pressing block 124 pushes a limiting rod 16 to move, the limiting rod 16 pushes a spring 15 to enable the spring 15 to contract, the inner tube 2 is placed on a bracket 122 and is in contact with a cushion arranged on the inner wall of the bracket 122, the pressing block 124 is loosened, the spring 15 stretches back to push the limiting rod 16 to move, the limiting rod 16 pushes the pressing block 124 to move, the pressing block 124 is pressed on the surface of the inner tube 2, the position of the inner tube 2 is positioned and pre-fixed through the bracket 122 and the pressing block 124, the inner tube 2 is pre-fixed through the positioning mechanism 12 in the first welding tube 7, the second welding tube 8 and a supporting mechanism 13 are sleeved on the surface of the inner tube 2, a fixing ring 131 of the supporting mechanism 13 is aligned to the inner tube 2, the fixing ring 131 is sleeved on the surface of the inner tube 2, the rubber pad 17 inside the fixing ring 131 contacts with the surface of the inner tube 2 to prevent the fixing ring 131 from hard contact with the surface of the inner tube 2 and prevent the inner tube 2 from being damaged, the outer tube 1 is fixedly connected with the fixing ring 131 through the connecting rod 132 to fix the position of the fixing ring 131 so as to fix the position of the inner tube 2, so that the installed inner tube 2 and the outer tube 1 are relatively fixed and prevent relative displacement, meanwhile, the fixing ring 131 of the supporting mechanism 13 is fixedly connected with the inner wall of the outer tube 1 through the connecting rod 132 to reserve a ventilation space and avoid insufficient ventilation, so as to improve the ventilation effect, the fireproof sealing gasket 6 is installed in the sealing groove 5, bolts sequentially pass through the threaded holes formed in the surfaces of the mounting ring 9, the first sealing boss 3 and the second sealing boss 4 to fix the positions of the mounting ring 9, the first sealing boss 3 and the second sealing boss 4, and after the position of the mounting ring 9 is fixed, at the moment, the protection tube 10 is sleeved at the welded end of the outer tube body 1 for protection, the internal thread tube 113 is rotated, the internal thread tube 113 drives the extrusion ring 114 to extrude the clamping blocks 112, the two clamping blocks 112 are tightly pressed on the surface of the outer tube body 1, the connection end of the outer tube body 1 is fixed, the stability of the connection part of the outer tube body 1 is improved, the connection part of the outer tube body 1 is prevented from being damaged, and the effect of preventing gas leakage is achieved, the inner wall of the connection part of the first sealing boss 3 and the second sealing boss 4 is sealed by the fireproof sealing gasket 6, when the first sealing boss 3 is fixedly installed with the second sealing boss 4 through a bolt, the second sealing boss 4 drives the sleeve 18 and the sealing ring 19 to move, the sealing ring 19 is sleeved on the surface of the first sealing boss 3, the inner wall of the sealing ring 19 is tightly adhered to the surfaces of the first sealing boss 3 and the second sealing boss 4 respectively, the position of the sleeve 18 is limited to the sealing ring 19, the second layer of sealing is carried out through the sleeve 18 and the sealing ring 19, so that the sealing performance of the joint of the outer pipe body 1 is improved, and the gas is prevented from leaking from the joint of the outer pipe body 1.

Although the novel embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

LNG ship gas double-walled pipe connecting device, its characterized in that includes: the sealing structure comprises an outer pipe body (1), an inner pipe body (2), a first sealing boss (3) and a second sealing boss (4), wherein sealing grooves (5) are formed in opposite surfaces of the first sealing boss (3) and the second sealing boss (4), a fireproof sealing gasket (6) is movably connected inside the sealing grooves (5), a first welding pipe (7) and a second welding pipe (8) are respectively arranged on end surfaces, far away from the sealing grooves (5), of the first sealing boss (3) and the second sealing boss (4), a mounting ring (9) is movably sleeved on the surfaces of the first welding pipe (7) and the second welding pipe (8), a protection pipe (10) is fixedly connected to the end surface of the mounting ring (9), the protection pipe (10) is movably sleeved on the surface of the outer pipe body (1), and a fixing mechanism (11) is arranged at one end, far away from the mounting ring (9), of the protection pipe (10), the inner wall of the first welding pipe (7) is provided with a positioning mechanism (12), the inner wall of the second welding pipe (8) is provided with a supporting mechanism (13), the positioning mechanism (12) and the supporting mechanism (13) are movably connected to the surface of the inner pipe body (2), threaded holes are formed in the surfaces of the mounting ring (9), the first sealing boss (3) and the second sealing boss (4), and the mounting ring (9), the first sealing boss (3) and the second sealing boss (4) are fixedly mounted through bolts.
2. The LNG ship gas double-wall pipe connection device according to claim 1, characterized in that the fixing mechanism (11) comprises an external threaded pipe (111), one end of the external threaded pipe (111) is fixedly connected with two clamping blocks (112), the number of the clamping blocks (112) is two, the two clamping blocks (112) are symmetrically arranged by taking a central horizontal plane passing through the protection pipe (10) as a symmetrical plane, the surface of the external threaded pipe (111) is in threaded connection with an internal threaded pipe (113), the inner wall of the internal threaded pipe (113) is provided with an extrusion ring (114), and the inclined plane of the extrusion ring (114) is movably connected with the inclined plane of the clamping blocks (112).
3. The LNG carrier gas double-wall pipe connecting device according to claim 1, characterized in that the positioning mechanism (12) comprises a supporting rod (121), a bracket (122), a telescopic assembly (123) and a pressing block (124), the supporting rod (121) is fixedly connected to the inner wall of the first welded pipe (7), the bracket (122) is fixedly connected to the top of the supporting rod (121), the pressing block (124) is located above the bracket (122), the inner walls of the bracket (122) and the pressing block (124) are both fixedly connected with cushions, the pressing block (124) is fixedly connected to the telescopic end of the telescopic assembly (123), and the fixed end of the telescopic assembly (123) is fixedly connected to the inner wall of the first welded pipe (7).
4. The LNG ship gas double-walled pipe connection according to claim 3, characterized in that the telescopic assembly (123) comprises a fixed pipe (14), a spring (15) and a limiting rod (16), the spring (15) is arranged inside the fixed pipe (14), the limiting rod (16) is fixedly connected to one end of the spring (15), and the limiting rod (16) is slidably connected to the inner wall of the fixed pipe (14).
5. The LNG ship gas double-walled pipe connection according to claim 1, characterized in that the support means (13) comprises a fixed ring (131) and a connecting rod (132), the connecting rod (132) is fixedly connected to the surface of the fixed ring (131), and the end of the connecting rod (132) remote from the fixed ring (131) is fixedly connected to the inner wall of the second welded pipe (8).
6. The LNG ship gas double-walled pipe connection of claim 5, characterized in that the number of the connecting rods (132) is four, and four connecting rods (132) are distributed in an annular array with the circle center of the fixed ring (131) as the array center.
7. The LNG carrier gas double-walled pipe connection of claim 5, characterized in that a rubber gasket (17) is fixedly connected to the inner wall of the fixing ring (131), the inner wall of the rubber gasket (17) is provided with anti-skid threads, and the inner wall of the rubber gasket (17) is in contact with the surface of the inner pipe body (2).
8. The LNG ship gas double-wall pipe connection according to claim 1, characterized in that a sleeve (18) is fixedly connected to the surface of the second sealing boss (4), a sealing ring (19) is embedded in the inner wall of the sleeve (18), and the inner wall of the sealing ring (19) is movably connected to the surface of the first sealing boss (3).
9. The LNG carrier gas double-wall pipe connecting device according to claim 8, wherein a connecting ring (20) is fixedly connected to the surface of the first sealing boss (3), an insertion groove (21) is formed in the end surface of the connecting ring (20), an insertion ring (22) is fixedly connected to the end surface of the sleeve (18), and the insertion ring (22) is inserted into the inner wall of the insertion groove (21).