CN115539826B

CN115539826B - A filling device for LNG ship

Info

Publication number: CN115539826B
Application number: CN202211229069.2A
Authority: CN
Inventors: 罗立辉; 罗玉; 龚迎斌; 欧绍明
Original assignee: Hunan Jinhang Ship Manufacturing Co ltd
Current assignee: Hunan Jinhang Ship Manufacturing Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-04-11
Anticipated expiration: 2042-10-09
Also published as: CN115539826A

Abstract

The invention discloses a filling device for an LNG ship, which comprises: the tank body assembly comprises a bottom frame, a mounting plate arranged on the bottom frame and a support frame structure arranged at the end part of the mounting plate, wherein the support frame structure is positioned in the bottom frame, and tank body assemblies distributed in an annular shape are arranged on the support frame structure; and a piston pressing assembly communicated with each tank assembly; the limiting ring is arranged in the middle of the underframe; the conveying heating assembly is arranged on the supporting frame structure, and the butt joint assembly is arranged at the lower part of the conveying heating assembly. According to the invention, two states of the butt joint component and the tank body component are adopted, wherein one state is that when the butt joint component is in butt joint with the tank body component and the initial pressure of the tank body is adjusted to the required strength, the liquefied natural gas can be prevented from flowing backwards; in another state, when the butt joint assembly is separated from the tank body assembly, the pressure inside the tank body is quickly relieved after the tank body deflects, and the risk of leakage of liquefied natural gas is reduced.

Description

A filling device for LNG ship

Technical Field

The invention relates to the technical field of LNG ship filling, in particular to a filling device for an LNG ship.

Background

Liquefied Natural Gas (LNG) is a clean energy source preferentially popularized by the country, the popularization and application of the LNG in the water transportation industry are needed for developing green traffic and building ecological civilization, energy conservation and emission reduction of the water transportation industry are realized, at present, the emission of ship pollutants is more and more strict, and a plurality of ships select the LNG (liquefied natural gas) as a fuel;

for example, the Chinese patent discloses a marine LNG filling device and a marine LNG filling device (202010123569.2). The marine LNG filling device comprises an LNG filling vehicle, a conveying pipe, a supporting piece, an LNG storage part arranged on a hull deck and a steam nozzle used for spraying high-temperature steam, wherein the conveying pipe is used for conveying LNG to the LNG storage part from the LNG filling vehicle, the supporting piece is arranged on the hull deck, the conveying pipe is arranged at an interval with the hull deck, the conveying pipe is supported above the hull deck through the supporting piece, one end, connected with the hull deck, of the supporting piece can rotate relative to the hull deck, so that the size of an included angle between the supporting piece and the hull deck is changed, and the steam nozzle is arranged between the hull deck and the conveying pipe. The marine LNG filling device is simple in structure, and can effectively prevent the low temperature on the conveying pipe from damaging the ship;

however, in the actual use process, on one hand, when the delivery pipe is butted with the ship storage box body, the phenomenon of liquefied natural gas backflow is easy to occur due to the internal pressure, so that an initial pressure is needed to be provided for the storage tank where the delivery pipe is located, and on the other hand, when an unexpected situation occurs, the butt joint pipeline is easy to leak, and the safety performance is not good.

Disclosure of Invention

The invention aims to provide a filling device for an LNG ship, which adopts two state modes of a butt joint component and a tank body component, namely, one state is that when the butt joint component is in butt joint with the tank body component, the process of filling natural gas into a gas storage bin can be assisted to be completed by adjusting the initial pressure in the tank body to the required strength, so that the liquefied natural gas can be prevented from flowing backwards, and the filling efficiency can be improved; the other state is that, when the butt joint component is separated from the tank body component, the tank body deflects and then is quickly decompressed, the butt joint component is matched with the structure setting, namely, the conveying port of the tank body component is automatically closed, the risk of leakage of liquefied natural gas is reduced, and the safety of the filling process is improved.

In order to achieve the purpose, the invention provides the following technical scheme: filling device for LNG carriers, comprising: the liquefied natural gas storage tank comprises a bottom frame, a mounting plate arranged on the bottom frame and a support frame structure arranged at the end part of the mounting plate, wherein the support frame structure is positioned in the bottom frame, tank body assemblies distributed in an annular mode are arranged on the support frame structure, and the tank body assemblies are used for storing liquefied natural gas; the piston pressing assembly is communicated with each tank body assembly, and when the support frame structure integrally runs, the piston pressing assembly is used for adjusting the initial pressure inside the tank body assembly; the piston pressing assembly further comprises a limiting ring arranged in the middle of the underframe, and the limiting ring is used for changing the telescopic length of the piston pressing assembly; the conveying heating assembly is arranged on the supporting frame structure and further comprises a butt joint assembly arranged at the lower part of the conveying heating assembly, and the conveying heating assembly is used for communicating the tank body assembly and conveying liquefied gas.

Preferably, each tank body component comprises a liquid storage tank, and a pressure gauge is mounted on the outer wall of each liquid storage tank and used for observing the pressure inside each liquid storage tank; and the intercommunication is in the first butt joint pipe on liquid storage pot upper portion, the inner wall of first butt joint pipe is fixed with second support piece and sealing ring, and the sealing ring is located second support piece's upper portion, still including setting up ball sealer between sealing ring and the second support piece, just be connected with the second spring between ball sealer's the outer wall and the upper surface of second support piece, the second spring is used for reseing of ball sealer.

Preferably, the butt joint assembly comprises a rotary spline sleeve, a first mounting frame arranged on the spline sleeve, a plurality of electric telescopic rods arranged at the top in the first mounting frame, lifting plates fixed at the telescopic ends of the electric telescopic rods, and an elastic bag arranged between the top surface in the first mounting frame and the upper surface of the lifting plates, wherein the spline sleeve is rotatably connected in a through hole formed in the mounting plate; the bottom of the lifting plate is further provided with a plurality of second butt joint pipes communicated with the elastic bag, the second butt joint pipes are in butt joint with the first butt joint pipes, a first supporting piece and a push rod arranged at the bottom of the first supporting piece are fixed inside the second butt joint pipes, and the push rod is used for opening a channel of the first butt joint pipes.

Preferably, the support frame structure comprises an installation rod, the installation rod is annularly arranged on the outer wall of the spline housing, a connecting block is rotatably installed at one end, away from the spline housing, of the installation rod, a placing plate is fixed on the side wall, away from the installation rod, of the connecting block, and the placing plate is used for placing the tank body assembly; the spline shaft is arranged in the spline sleeve and can move in a telescopic mode, the spline shaft is matched with the spline sleeve, a first transmission rod is annularly arranged at the top of the spline shaft, the end portion, far away from the spline shaft, of the first transmission rod and a connecting block are respectively provided with a ball hinge piece, the ball hinge piece located at the connecting block and the ball hinge piece located at the end portion of the spline shaft are arranged in an eccentric mode, and a second transmission rod is arranged between the two ball hinge pieces; and the driving assembly is arranged at the bottom of the mounting plate and is used for driving the spline housing to rotate.

Preferably, the tank body assembly further comprises a pull rope assembly arranged between the butt joint assembly and the supporting frame structure, and the pull rope assembly is used for rapid pressure relief of the tank body assembly; the pull rope assembly comprises a connecting rope and a second mounting frame fixed at the bottom of the spline housing, a mounting piece is arranged on the second mounting frame, a mounting shaft is arranged on the mounting piece, a swing rod is rotatably connected onto the mounting shaft, a torsion spring is connected between the outer wall of the mounting shaft and the inner wall of the swing rod, and the torsion spring is used for resetting the swing rod; the U-shaped end part of the swing rod is also provided with a limiting column which is used for driving the spline shaft to move up and down when the swing rod runs; the bottom of the spline shaft is also fixed with a disc, the outer wall of the disc is provided with a limiting groove, and the limiting column can slide in the limiting groove in a limiting way.

Preferably, the piston pressing assembly comprises a piston sleeve and a piston rod which is arranged inside the piston sleeve and can move in a telescopic mode, a transmission block is fixed to the end portion of the piston rod, a first spring is connected to the outer wall of the piston rod between the transmission block and the piston sleeve, and the first spring is used for resetting the piston rod.

Preferably, the driving assembly comprises a motor fixed at the bottom of the mounting plate and a first transmission tooth fixed at the output end of the motor; still including fixing the second driving tooth of spline housing lower part, the second driving tooth meshes with first driving tooth mutually, and the meshing of second driving tooth and first driving tooth is used for driving the rotation of spline housing.

Preferably, the conveying and heating assembly comprises a first heat insulation sleeve arranged at the upper part of the first mounting frame; the heat insulation bag comprises an elastic bag, a plurality of first pipelines and a three-way pipe, wherein the elastic bag is arranged on the elastic bag, the first pipelines are communicated with the elastic bag, each first pipeline is distributed in a loop shape, a three-way pipe is arranged at the end part, far away from the elastic bag, of each first pipeline, one end of each three-way pipe extends to the top of the corresponding first heat insulation sleeve and is connected with a first conveying pipe, the other end of each three-way pipe is gathered to the corresponding second pipeline and is communicated with the corresponding second pipeline, the corresponding second pipeline is arranged on the upper surface of the corresponding first heat insulation sleeve, one end, far away from the corresponding first pipeline, of each second pipeline extends to the top of the corresponding second heat insulation sleeve and is connected with a second conveying pipe, and the corresponding second heat insulation sleeve is arranged on the upper surface of the corresponding first heat insulation sleeve and is sleeved outside the corresponding second pipeline.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the structural arrangement of the support frame assembly is matched and the piston pressing assembly is effectively matched with the limiting ring through two state modes of the butt joint assembly and the tank body assembly, so that the pressure inside the tank body is correspondingly changed, namely, one state is that when the butt joint assembly is in butt joint with the tank body assembly, the process of filling natural gas into the gas storage bin can be assisted to be completed by adjusting the initial pressure inside the tank body to the required strength, the liquefied natural gas can be prevented from flowing backwards, and the filling efficiency is improved; the other state is that, when the butt joint component is separated from the tank body component, the tank body deflects and then is quickly decompressed, the butt joint component is matched with the structure setting, namely, the conveying port of the tank body component is automatically closed, the risk of leakage of liquefied natural gas is reduced, and the safety of the filling process is improved.

2. As another embodiment of the present invention, when the lng passes through the docking assembly from the inside of the storage tank where the tank assembly is located to enter the first pipeline and the second pipeline, where the first pipeline is preferably distributed in a circular shape, and the second pipeline is preferably distributed in a vortex shape, the first thermal insulation sleeve and the second thermal insulation sleeve can respectively and uniformly heat the natural gas inside the first pipeline and the first pipeline by the shape characteristics of the first pipeline and the second pipeline, so as to avoid the adverse effect of delivering the supercooled natural gas to the ship hull.

Drawings

FIG. 1 is a schematic view of a first perspective three-dimensional structure according to the present invention;

FIG. 2 is a partially disassembled perspective view of FIG. 1;

FIG. 3 is a perspective view of the second perspective view of FIG. 1;

FIG. 4 is a perspective view of the third perspective view of FIG. 1;

FIG. 5 is an enlarged structural view of the supporting frame of the present invention;

FIG. 6 is a schematic front view of the structure of FIG. 5;

FIG. 7 is an enlarged structural diagram of the inside of the first butt joint pipe and the second butt joint pipe;

FIG. 8 is an enlarged view of the interior of the conveyor heating assembly;

fig. 9 is a schematic perspective view of embodiment 5 of the present invention.

In the figure: 1. a chassis; 2. a limiting ring; 3. a first mounting bracket; 5. a first insulating sleeve; 6. a first delivery pipe; 7. a second insulating sleeve; 8. a second delivery pipe; 9. a liquid storage tank; 10. a piston sleeve; 11. a piston rod; 12. a transmission block; 13. a first spring; 14. a manometer; 15. mounting a plate; 16. placing the plate; 17. a spline shaft; 18. a first transmission lever; 19. a ball hinge; 20. a second transmission rod; 21. a spline housing; 22. a motor; 23. a first drive tooth; 24. a second gear; 25. a second mounting bracket; 26. installing a shaft; 27. a limiting post; 28. a disc; 29. a swing rod; 30. connecting blocks; 31. a first conduit; 32. a second conduit; 33. a first butt joint pipe; 34. a second pair of adapter tubes; 35. a first support member; 36. an electric telescopic rod; 37. connecting ropes; 38. a push rod; 39. a seal ring; 40. a second support member; 41. a sealing ball; 42. a second spring; 43. an elastic bag; 44. a circular track; 45. a lifting plate; 46. a slider; 47. a support frame.

Detailed Description

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 9, the present invention preferably provides a technical solution: filling device for LNG carriers, comprising: the liquefied natural gas storage tank comprises a bottom frame 1, a mounting plate 15 arranged on the bottom frame 1 and a support frame structure arranged at the end part of the mounting plate 15, wherein the support frame structure is positioned in the bottom frame 1, tank body assemblies distributed in an annular mode are arranged on the support frame structure, and the tank body assemblies are used for storing liquefied natural gas; the piston pressing assembly is communicated with each tank body assembly and is used for adjusting the initial pressure inside the tank body assembly when the support frame structure integrally operates; the piston pressing device further comprises a limiting ring 2 arranged in the middle of the underframe 1, and the limiting ring 2 is used for changing the telescopic length of the piston pressing assembly; the conveying heating assembly is arranged on the supporting frame structure, and the conveying heating assembly further comprises a butt joint assembly arranged at the lower part of the conveying heating assembly, and the conveying heating assembly is used for communicating the tank body assembly and conveying liquefied gas.

In the embodiment, through the structural arrangement of the support frame structure, when a tank body assembly placed on the support frame structure rotates, the initial pressure of the tank body assembly can be adjusted by matching the morphological characteristics of the limit ring 2 through the action of the piston pressing assembly, namely the inner wall of the limit ring 2 is in an irregular arc shape, and particularly as shown in fig. 1 and 3, due to the action of the butt joint assembly, when the butt joint assembly is in butt joint with the tank body assembly, the tank body assembly can open the conveying port, the structural arrangement of the support frame structure can change the telescopic length of the piston pressing assembly through the action of the piston pressing assembly and matching the morphological characteristics of the limit ring 2, so that the initial pressure in the tank body assembly is changed and adjusted to the required strength, and according to the design, the initial strength is provided for the tank body assembly and adjusted according to the required strength, on one hand, the liquefied natural gas can be conveyed to the ship body gas storage bin, on the other hand, the liquefied natural gas can be prevented, and the efficiency and safety performance of filling can be improved;

when an emergency occurs, the butt joint assembly needs to be separated from the tank body assembly, at the moment, due to the structural arrangement of the interior of the butt joint assembly, the conveying port of the tank body assembly can be automatically closed, the tank body assembly is inclined and deflected by matching with the further arrangement of the support frame assembly, and at the moment, the piston pressing assembly is separated from the inner wall of the limiting ring 2, so that the pressure in the tank body assembly is quickly relieved;

further, the two state modes of the butt joint component and the tank body component are matched with the structural arrangement of the support frame component and the effective matching of the piston pressing component and the limiting ring 2, so that the pressure inside the tank body is correspondingly changed, namely, the state is that when the butt joint component is in butt joint with the tank body component and the initial pressure inside the tank body is adjusted to the required strength, the process of filling natural gas into the gas storage bin can be assisted to be completed, the liquefied natural gas can be prevented from flowing backwards, and the filling efficiency is improved; the other state is that, when the butt joint component is separated from the tank body component, the tank body deflects and then is quickly decompressed, the butt joint component is matched with the structure setting, namely, the conveying port of the tank body component is automatically closed, the risk of leakage of liquefied natural gas is reduced, and the safety of the filling process is improved.

Further, each tank body component comprises a liquid storage tank 9, and a pressure gauge 14 is installed on the outer wall of the liquid storage tank 9 and used for observing the pressure inside the liquid storage tank 9; and communicate at the first butt joint pipe 33 on liquid storage pot 9 upper portion, the inner wall of first butt joint pipe 33 is fixed with second support piece 40 and sealing ring 39, and sealing ring 39 is located the upper portion of second support piece 40, still including setting up sealed ball 41 between sealing ring 39 and the second support piece 40, and be connected with second spring 42 between the outer wall of sealed ball 41 and the upper surface of second support piece 40, second spring 42 is used for the reposition of sealed ball 41.

As shown in fig. 1 and 7, the second support member 40 is preferably a cross structure, when the ship body gas storage bin needs to be filled with natural gas, at this time, the docking assembly is docked with the first docking pipe 33 where the tank assembly is located, under the pushing action of the docking assembly, the sealing ball 41 moves downward and further compresses the second spring 42, so that the channel of the first docking pipe 33 is opened, the structural arrangement of the support frame assembly is matched, and the effective matching of the piston pressing assembly and the limit ring 2 is observed, the value of the pressure gauge 14 is observed, so that the initial pressure inside the liquid storage tank 9 is adjusted to the required strength, the external air pump is assisted, further, the liquefied natural gas enters the docking assembly through the gap of the sealing ring 39, when the docking assembly is separated from the first docking pipe 33 where the tank assembly is located, due to the action of the second spring 42, the sealing ball 41 can be reset, so that the gap of the sealing ring 39 is blocked, that the transportation of the natural gas is automatically blocked, and since the initial state of the second spring 42 is a compressed state and the form characteristic of the sealing ball 41 is matched, the second spring 42 is tightly attached to the sealing ball 41, so that the sealing performance between the sealing ring 39 and the sealing ball 41 is enhanced.

Further, the docking assembly comprises a rotary spline sleeve 21, the spline sleeve 21 is rotatably connected in a through hole formed in the mounting plate 15, a first mounting frame 3 is arranged on the spline sleeve 21, a plurality of electric telescopic rods 36 are arranged at the top in the first mounting frame 3, telescopic ends of the plurality of electric telescopic rods 36 are fixedly provided with a lifting plate 45, the docking assembly also comprises an elastic bag 43 arranged between the top surface in the first mounting frame 3 and the upper surface of the lifting plate 45, and the elastic bag 43 is used for conveying liquefied natural gas; the bottom of the lifting plate 45 is further provided with a plurality of second connection pipes 34 communicated with the elastic bag 43, the second connection pipes 34 are connected with the first connection pipes 33 in an abutting mode, a first support member 35, which is optionally cross-shaped or straight-line-shaped, preferably cross-shaped, is fixed inside the second connection pipes 34, and a push rod 38 is arranged at the bottom of the first support member 35, and the push rod 38 is used for opening the channel of the first connection pipes 33.

By adjusting the telescopic length of the electric telescopic rod 36, that is, adjusting the degree of the first butt joint pipe 33 where the tank assembly is located entering the interior of the second butt joint pipe 34 where the tank assembly is located, thereby adjusting the delivery amount of the liquefied natural gas in a unit time, specifically as shown in fig. 1 and 7, when the speed of the LNG ship filling the ship gas storage bin with the natural gas needs to be adjusted, the power provided by the electric telescopic rod 36 at this time can make the lifting plate 45 move up and down, thereby making the second butt joint pipe 34 arranged at the bottom of the lifting plate 45 move telescopically, as shown in fig. 7, when the electric telescopic rod 36 is gradually extended, the second butt joint pipe 34 can be butted with the first butt joint pipe 33, and the first butt joint pipe 33 enters the second butt joint pipe 34, at this time, the push rod 38 is in contact with the sealing ball 41, and gradually compresses the second spring 42, until the first butt joint pipe 33 is in contact with the first support 35, at this time, the delivery amount of the natural gas in a unit time reaches the maximum value, and when the electric telescopic rod 36 is gradually extended, the elastic bag 43 is gradually extended, so that the elastic bag 43 is extended, the elastic bag 43 is further, and the tank assembly is retracted, and the liquefied natural gas is discharged from the interior of the tank assembly, and the tank assembly is discharged from the elastic bag 43, and the liquefied natural gas storage bin 36 is discharged.

Further, the support frame structure comprises a mounting rod, the mounting rod is annularly arranged on the outer wall of the spline housing 21, a connecting block 30 is rotatably mounted at one end, away from the spline housing 21, of the mounting rod, a placing plate 16 is fixed on the side wall, away from the mounting rod, of the connecting block 30, and the placing plate 16 is used for placing the tank body assembly; the spline shaft is characterized by further comprising a spline shaft 17 which is arranged inside the spline housing 21 and can move in a telescopic mode, the spline shaft 17 is matched with the spline housing 21, a first transmission rod 18 is annularly arranged at the top of the spline shaft 17, the end, far away from the spline shaft 17, of the first transmission rod 18 and a connecting block 30 are respectively provided with a ball hinge part 19, the ball hinge part 19 located at the connecting block 30 and the ball hinge part 19 located at the end of the spline shaft 17 are arranged in an eccentric mode, and a second transmission rod 20 is arranged between the two ball hinge parts 19; and a drive assembly disposed at the bottom of the mounting plate 15 for driving rotation of the spline housing 21.

As shown in fig. 5, the spline housing 21 can be rotated by the power provided by the driving assembly, so that the placing plate 16 disposed on the spline housing 21 is rotated, and the tank assembly placed on the placing plate 16 is rotated, because of the characteristic of the spline shaft 17 matching with the spline housing 21, the spline housing 21 can drive the spline shaft 17 to rotate when rotating, and because the spline shaft 17 can move telescopically inside the spline housing 21, and the second transmission rod 20 is disposed between the two ball hinge parts 19, when the spline shaft 17 moves inside the spline housing 21, the placing plate 16 can be driven to deflect, when the butt joint assembly is separated from the tank assembly, at this moment, when the spline shaft 17 moves inside the spline housing 21, the piston is matched with the separation of the pressing assembly and the limit ring 2, and the pressure relief can be performed inside the tank assembly.

Example 2

As another embodiment of the invention, the tank body assembly further comprises a pull rope assembly arranged between the butt joint assembly and the supporting frame structure, wherein the pull rope assembly is used for quickly relieving pressure of the tank body assembly; the pull rope component comprises a connecting rope 37 and a second mounting rack 25 fixed at the bottom of the spline housing 21, a mounting piece is arranged on the second mounting rack 25, a mounting shaft 26 is arranged on the mounting piece, a swing rod 29 is rotatably connected to the mounting shaft 26, and a torsion spring is connected between the outer wall of the mounting shaft 26 and the inner wall of the swing rod 29 and used for resetting the swing rod 29; a limiting column 27 is further arranged at the U-shaped end part of the swing rod 29 and is used for driving the spline shaft 17 to move up and down when the swing rod 29 runs; the bottom of the spline shaft 17 is also fixed with a disc 28, the outer wall of the disc 28 is provided with a limiting groove, and the limiting column 27 can slide in the limiting groove in a limiting way.

In this embodiment, as shown in fig. 3, since the connection rope 37 is connected between the lifting plate 45 where the docking assembly is located and the U-shaped end of the swing rod 29, during a normal filling process, the connection rope 37 is in a loose state, when an LNG ship meets an emergency when filling natural gas into the ship gas storage tank, first, the electric telescopic rod 36 is driven to separate the docking assembly from the tank assembly and tension the connection rope 37, when the docking assembly is completely separated from the tank assembly, the connection rope 37 is in a stretched state, at this time, the electric telescopic rod 36 where the docking assembly is located further retracts, through the connection rope 37, the swing rod 29 can deflect around the installation shaft 26, that is, the U-shaped end of the swing rod 29 deflects downward, due to the limiting function of the limiting groove, the spline shaft 17 can be driven to move downward, so that the tank assembly located on the placing plate 16 and the piston pressing assembly thereon deflect obliquely, that is, that the piston pressing assembly is separated from the limiting ring 2, thereby automatically relieving the pressure inside of the tank assembly, and matching with the automatic closing function of the tank assembly, so that in the above process, the device has an automatic protection system, thereby reducing the possibility of danger of operators during the filling process, and ensuring the safety of the operators.

Example 3

As another embodiment of the present invention, the piston pressing assembly includes a piston sleeve 10 and a piston rod 11 that extends and retracts inside the piston sleeve 10, a transmission block 12 is fixed to an end of the piston rod 11, a first spring 13 is connected to an outer wall of the piston rod 11 between the transmission block 12 and the piston sleeve 10, and the first spring 13 is used for restoring the piston rod 11.

Through the structural feature of spacing ring 2, the inner wall of spacing ring 2 is irregular arc, at normal filling process, the board 16 of placing at this moment supporting frame structure place keeps the level, as shown in fig. 1, when needs adjust required initial pressure, make supporting frame structure rotatory, and drive jar body subassembly and rotate, because the structural feature of spacing ring 2, can make piston rod 11 at piston bush 10 inside concertina movement, observe the value of manometer 14 this moment, can adjust the initial pressure of every liquid storage pot 9, when meetting emergency, supporting frame structure drives jar body subassembly slope deflection, and make driving block 12 break away from spacing ring 2, under the effect of first spring 13, make piston rod 11 to keeping away from piston bush 10 inside direction removal, can accomplish quick pressure release.

Further, the driving assembly comprises a motor 22 fixed at the bottom of the mounting plate 15, and a first transmission gear 23 fixed at the output end of the motor 22; the gear mechanism further comprises a second transmission gear 24 fixed on the lower portion of the spline housing 21, the second transmission gear 24 is meshed with the first transmission gear 23, and the second transmission gear 24 is meshed with the first transmission gear 23 to drive the spline housing 21 to rotate.

As shown in fig. 4 and 5, the first transmission gear 23 is rotated by the power provided by the motor 22, and then the second transmission gear 24 engaged with the first transmission gear 23 is driven to rotate, and the second transmission gear 24 is fixed on the lower part of the spline housing 21, so that the spline housing 21 is rotated, and the tank assembly is driven to rotate.

Example 4

As other embodiments of the present invention, the conveying and heating assembly includes a first heat insulating sleeve 5 disposed at an upper portion of the first mounting frame 3; and the plurality of first pipelines 31 are arranged on the elastic bag 43 and communicated with the elastic bag 43, each first pipeline 31 is distributed in a loop shape, a three-way pipe is arranged at the end part of each first pipeline 31, which is far away from the elastic bag 43, one end of each three-way pipe extends to the top of the first heat insulation sleeve 5 and is connected with the first conveying pipe 6, the other end of each three-way pipe is converged to the second pipeline 32 and is communicated with the second pipeline 32, the second pipeline 32 is arranged on the upper surface of the first heat insulation sleeve 5, one end of the second pipeline 32, which is far away from the first pipeline 31, extends to the top of the second heat insulation sleeve 7 and is connected with the second conveying pipe 8, and the second heat insulation sleeve 7 is arranged on the upper surface of the first heat insulation sleeve 5 and is sleeved outside the second pipeline 32.

In the present embodiment, by the heating sheets disposed on the inner walls of the first insulating sleeve 5 and the second insulating sleeve 7, when the liquefied natural gas enters the first pipeline 31 and the second pipeline 32 from the inside of the storage tank 9 where the tank assembly is located through the docking assembly, as shown in fig. 8, the first pipeline 31 is preferably distributed in a loop shape, and the second pipeline 32 is preferably distributed in a vortex shape, by the shape characteristics of the first pipeline 31 and the second pipeline 32, the first insulating sleeve 5 and the second insulating sleeve 7 can respectively and uniformly heat the natural gas inside the first pipeline 31 and the first pipeline 31, so as to avoid the adverse effect caused by the over-cooled natural gas being delivered to the ship hull;

through the arrangement of the first conveying pipes 6 and the second conveying pipes 8 and the electromagnetic control valves arranged in the first conveying pipes 6 and the second conveying pipes 8, when the electromagnetic control valves at the corresponding positions work, the LNG ship can have two conveying modes for the ship body gas filling cabins, and when natural gas needs to be filled into the gas filling cabins, the LNG ship can be in butt joint with the gas filling cabins through the arranged first conveying pipes 6; when a large amount of natural gas is needed to be conveyed quickly, the natural gas can be suitable for different occasions through the second conveying pipe 8, and the application range is widened.

Example 5

In another embodiment of the present invention, in order to improve the overall stability of the device, the chassis 1 is further provided with a support frame 47 and a circular rail 44 disposed on the top of the support frame 47, a slidable slider 46 is mounted inside the circular rail 44, and the two sliders 46 are fixed to the outer wall of the first mounting frame 3 through a connecting rod.

As shown in fig. 9, when the required initial pressure needs to be adjusted, the supporting frame structure is rotated to drive the tank assembly to integrally rotate, at this time, the corresponding first mounting frame 3 rotates, and due to the effect of the two sliding blocks 46 and the sliding blocks 46 can slide in the circular track 44, the first mounting frame 3 can be stably supported during operation.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The detachable installation mode has various modes, for example, a mode of matching with a buckle through plugging, for example, a mode of connecting through a bolt, and the like.

The conception, the specific structure and the technical effects of the present invention are clearly and completely described above in connection with the embodiments and the accompanying drawings, so that the objects, the features and the effects of the present invention can be fully understood. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions.

The above embodiments are described in detail for the purpose of further illustrating the present invention and should not be construed as limiting the scope of the present invention, and the skilled engineer can make insubstantial modifications and variations of the present invention based on the above disclosure.

Claims

1. Filling device for LNG carriers, characterized in that it comprises:

the liquefied natural gas storage tank comprises a bottom frame (1), a mounting plate (15) arranged on the bottom frame (1), and a support frame structure arranged at the end part of the mounting plate (15), wherein the support frame structure is positioned in the bottom frame (1), tank body assemblies distributed in an annular mode are mounted on the support frame structure, and the tank body assemblies are used for storing liquefied natural gas;

the piston pressing assembly is communicated with each tank body assembly, and when the support frame structure integrally runs, the piston pressing assembly is used for adjusting the initial pressure inside the tank body assembly;

the piston pressing device is characterized by further comprising a limiting ring (2) arranged in the middle of the underframe (1), wherein the limiting ring (2) is used for changing the telescopic length of the piston pressing assembly;

the conveying heating assembly is arranged on the supporting frame structure and also comprises a butt joint assembly arranged at the lower part of the conveying heating assembly, and the conveying heating assembly is used for communicating the tank body assembly and conveying liquefied gas;

the butt joint assembly comprises a rotary spline sleeve (21), the spline sleeve (21) is rotatably connected in a through hole formed in a mounting plate (15), a first mounting frame (3) is arranged on the spline sleeve (21), a plurality of electric telescopic rods (36) are arranged at the inner top of the first mounting frame (3), telescopic ends of the electric telescopic rods (36) are fixedly provided with a lifting plate (45), the butt joint assembly further comprises an elastic bag (43) arranged between the inner top surface of the first mounting frame (3) and the upper surface of the lifting plate (45), and the elastic bag (43) is used for conveying liquefied natural gas;

the bottom of the lifting plate (45) is also provided with a plurality of second butt joint pipes (34) communicated with the elastic bag (43), the second butt joint pipes (34) are butted with the first butt joint pipes (33), a first supporting piece (35) and a push rod (38) arranged at the bottom of the first supporting piece (35) are fixed inside the second butt joint pipes (34), and the push rod (38) is used for opening the channel of the first butt joint pipes (33);

the supporting frame structure comprises a mounting rod, the mounting rod is annularly arranged on the outer wall of the spline housing (21), a connecting block (30) is rotatably mounted at one end, away from the spline housing (21), of the mounting rod, a placing plate (16) is fixed on the side wall, away from the mounting rod, of the connecting block (30), and the placing plate (16) is used for placing the tank body assembly;

the spline shaft is characterized by further comprising a spline shaft (17) which is arranged inside the spline sleeve (21) and can move in a telescopic mode, the spline shaft (17) is matched with the spline sleeve (21), a first transmission rod (18) is annularly arranged at the top of the spline shaft (17), the end part, away from the spline shaft (17), of the first transmission rod (18) and a connecting block (30) are respectively provided with a ball hinge piece (19), a ball hinge piece (19) located at the connecting block (30) and the ball hinge piece (19) located at the end part of the spline shaft (17) are eccentrically arranged, and a second transmission rod (20) is arranged between the two ball hinge pieces (19);

the driving assembly is arranged at the bottom of the mounting plate (15) and is used for driving the spline housing (21) to rotate;

the tank body assembly is characterized by also comprising a pull rope assembly arranged between the butt joint assembly and the support frame structure, wherein the pull rope assembly is used for quickly relieving pressure of the tank body assembly;

the pull rope assembly comprises a connecting rope (37) and a second mounting rack (25) fixed to the bottom of the spline housing (21), a mounting piece is arranged on the second mounting rack (25), a mounting shaft (26) is arranged on the mounting piece, a swing rod (29) is rotatably connected to the mounting shaft (26), a torsion spring is connected between the outer wall of the mounting shaft (26) and the inner wall of the swing rod (29), and the torsion spring is used for resetting the swing rod (29);

a limiting column (27) is further arranged at the U-shaped end part of the swing rod (29), and when the swing rod (29) runs, the limiting column is used for driving the spline shaft (17) to move up and down;

the bottom of the spline shaft (17) is further fixed with a disc (28), the outer wall of the disc (28) is provided with a limiting groove, and the limiting column (27) can slide in the limiting groove in a limiting mode.

2. Filling device for LNG ships according to claim 1, characterized in that: each tank body component comprises a liquid storage tank (9), and a pressure gauge (14) is installed on the outer wall of each liquid storage tank (9) and used for observing the pressure inside each liquid storage tank (9); and the intercommunication is in first butt joint pipe (33) on liquid storage pot (9) upper portion, the inner wall of first butt joint pipe (33) is fixed with second support piece (40) and sealing ring (39), and sealing ring (39) are located the upper portion of second support piece (40), still including setting sealing ball (41) between sealing ring (39) and second support piece (40), just be connected with second spring (42) between the outer wall of sealing ball (41) and the upper surface of second support piece (40), second spring (42) are used for reseing of sealing ball (41).

3. Filling device for LNG ships according to claim 1, characterized in that: the piston pressing assembly comprises a piston sleeve (10) and a piston rod (11) which stretches and retracts inside the piston sleeve (10), a transmission block (12) is fixed to the end of the piston rod (11), a first spring (13) is connected to the outer wall of the piston rod (11) between the transmission block (12) and the piston sleeve (10), and the first spring (13) is used for resetting the piston rod (11).

4. Filling device for LNG carriers according to claim 1, characterized in that: the driving assembly comprises a motor (22) fixed at the bottom of the mounting plate (15) and a first transmission tooth (23) fixed at the output end of the motor (22);

still including fixing second driving tooth (24) of spline housing (21) lower part, second driving tooth (24) and first driving tooth (23) mesh mutually, and the meshing of second driving tooth (24) and first driving tooth (23) is used for driving the rotation of spline housing (21).

5. Filling device for LNG carriers according to claim 1, characterized in that: the conveying and heating assembly comprises a first heat insulation sleeve (5) arranged at the upper part of the first mounting rack (3);

and the first pipelines (31) are arranged on the elastic bag (43) and communicated with the elastic bag, each first pipeline (31) is distributed in a looped manner, a three-way pipe is arranged at the end part, far away from the elastic bag (43), of each first pipeline (31), one end of each three-way pipe extends to the top of the first heat insulation sleeve (5) and is connected with the first conveying pipe (6), the other end of each three-way pipe is converged to the second pipeline (32) and is communicated with the second pipeline, the second pipeline (32) is arranged on the upper surface of the first heat insulation sleeve (5), one end, far away from the first pipeline (31), of the second pipeline (32) extends to the top of the second heat insulation sleeve (7) and is connected with the second conveying pipe (8), and the second heat insulation sleeve (7) is arranged on the upper surface of the first heat insulation sleeve (5) and is sleeved outside the second pipeline (32).