A liquefied natural gas storage tank safety relief device

Abstract

The utility model relates to pressure relief protection device technical field, and disclose a kind of liquefied natural gas storage tank safety pressure relief device, including liquefied natural gas storage tank, the front side of the upper surface of liquefied natural gas storage tank is fixedly connected with communicating pipe, the top of communicating pipe is fixedly connected with connecting plate.The utility model sets up connecting plate, rubber gasket No. 1, installation box, rotating pressure plate and driving rod, when operating personnel rotates single thread screw rod, moving plate and cylinder will be driven by single thread screw rod and start to move upwards, and the movement of cylinder will drive driving rod, so that driving rod and rotating pressure plate start to rotate, finally with the rotation of two rotating pressure plates, the other end of two rotating pressure plates will contact and extrude the lower surface of connecting plate, so that installation box and connecting plate tightly clamp rubber gasket No. 1, at this time installation box is fixed on the top of connecting plate as a whole, so that the quick disassembly and assembly of installation box as a whole are realized.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure relief protection devices, and more specifically, to a safety pressure relief device for liquefied natural gas storage tanks. Background Technology

[0002] Liquefied natural gas (LNG) is natural gas that has been deep-frozen and converted into a liquid state. Under ultra-low temperature conditions, it is a colorless and transparent liquid with a volume that is only a fraction of that of its gaseous state, significantly improving storage and transportation efficiency. This clean energy produces far fewer pollutants when burned than traditional fossil fuels. It is widely used in urban gas peak shaving, industrial fuel substitution, and transportation power. As an important bridge in the process of low-carbon energy transition, LNG can meet current energy needs while also benefiting environmental protection, and its use is being accelerated globally.

[0003] When transporting liquefied natural gas (LNG) storage tanks, operators typically install safety pressure relief devices on the tanks to prevent potential safety hazards caused by excessive internal pressure. However, while existing safety pressure relief devices have basic pressure relief functions, they are generally directly fixed to the tank, making them inconvenient to install and remove. Therefore, improvements are needed. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a safety pressure relief device for liquefied natural gas storage tanks, which has the advantage of being easy to disassemble and assemble.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety pressure relief device for a liquefied natural gas (LNG) storage tank, comprising an LNG storage tank, a connecting pipe fixedly connected to the front side of the upper surface of the LNG storage tank, a connecting plate fixedly connected to the top end of the connecting pipe, a first rubber sealing gasket movably connected to the upper surface of the connecting plate, an installation box fixedly connected to the upper surface of the first rubber sealing gasket, the inner surface of the installation box and the outer surface of the connecting plate being movably sleeved, and two rotating shafts movably sleeved on both sides of the front surface of the installation box, the rear ends of both rotating shafts penetrating the installation box and extending into the installation box. On the rear side, rotating pressure plates located inside the mounting box are fixedly sleeved on the outer surfaces of the two rotating shafts. A driving rod located on the front side of the mounting box is fixedly sleeved on the outer surfaces of the two rotating shafts. A cylinder is movably connected to the inner surface of the driving rod. A movable plate located on the front side of the driving rod is fixedly sleeved on the outer surface of the cylinder. A No. 1 fixed plate is fixedly connected to the upper and lower sides of the front surface of the mounting box. A single-threaded rod is movably sleeved on the middle of the upper surface of the No. 1 fixed plate. The bottom end of the single-threaded rod passes through the No. 1 fixed plate and the movable plate in sequence and extends to the lower side of the No. 1 fixed plate. The outer surface of the single-threaded rod and the inner surface of the movable plate are threaded together.

[0006] As a preferred technical solution of this utility model, a first limiting rod is fixedly sleeved on both the left and right sides of the upper surface of the first fixed plate. The bottom end of the first limiting rod passes through the first fixed plate and the moving plate in sequence and extends to the lower surface of the first fixed plate. The outer surface of the first limiting rod and the inner surface of the moving plate are movably sleeved.

[0007] As a preferred embodiment of this utility model, side plates are fixedly connected to the outer surfaces of both sides of the mounting box, a sleeve block is fixedly connected to the upper surface of the mounting box, a second rubber sealing gasket is movably connected to the upper surface of the sleeve block, a trapezoidal plate is fixedly connected to the upper surface of the second rubber sealing gasket, a pressure relief valve is fixedly sleeved on the inner surfaces of the trapezoidal plate and the second rubber sealing gasket, and the bottom end of the outer surface of the pressure relief valve is movably sleeved on the inner surface of the sleeve block.

[0008] As a preferred technical solution of this utility model, the upper surface of the sleeve block is fixedly connected to a guide post located outside the second rubber sealing gasket. The top end of the guide post penetrates the trapezoidal plate and extends above the second rubber sealing gasket. The outer surface of the guide post and the inner surface of the trapezoidal plate are movably sleeved together.

[0009] As a preferred technical solution of this utility model, trapezoidal pressure blocks are movably connected to both the left and right sides of the outer surface of the trapezoidal plate. There are two trapezoidal pressure blocks, and a movable plate is fixedly connected to the lower surface of each of the two trapezoidal pressure blocks. The lower surface of the movable plate is movably connected to the upper surface of the mounting box.

[0010] As a preferred technical solution of this utility model, the left and right sides of the upper surface of the mounting box are fixedly connected with a second fixing plate. A double-threaded rod is movably sleeved on the rear side of the left surface of the second fixing plate. The right end of the double-threaded rod passes through the second fixing plate and the movable plate in sequence and extends to the right side of the second fixing plate. The outer surface of the double-threaded rod and the inner surface of the movable plate are threaded together.

[0011] As a preferred technical solution of this utility model, a second limiting rod is fixedly connected to the front side of the right surface of the second fixed plate. The left end of the second limiting rod passes through the second fixed plate and the movable plate in sequence and extends to the left surface of the second fixed plate. The outer surface of the second limiting rod and the inner surface of the movable plate are movably sleeved.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, by setting up a connecting plate, a first rubber sealing gasket, a mounting box, a rotating pressure plate, and a driving rod, allows the moving plate and cylinder to move upwards when the operator rotates the single-threaded rod. The movement of the cylinder then drives the driving rod, causing the driving rod and the rotating pressure plate to rotate. Finally, as the two rotating pressure plates rotate, their other ends contact and press against the lower surface of the connecting plate, thereby tightly clamping the first rubber sealing gasket between the mounting box and the connecting plate. At this point, the entire mounting box is fixed above the connecting plate, thus achieving quick assembly and disassembly of the entire mounting box.

[0014] 2. This utility model, by setting up a socket block, a second rubber sealing gasket, a trapezoidal plate, a trapezoidal pressure block, and a double-threaded rod, uses two trapezoidal pressure blocks to press the trapezoidal plate downwards. When the operator rotates the double-threaded rod, the two movable plates will move in opposite directions under the action of the double-threaded rod. When the two trapezoidal pressure blocks no longer block the trapezoidal plate, the operator can directly pull out the pressure relief valve, the trapezoidal plate, and the second rubber sealing gasket, thereby realizing convenient disassembly and replacement of the pressure relief valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the installation box of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the back of the mounting box of this utility model;

[0018] Figure 4 This is a cross-sectional view of the back of the mounting box of this utility model;

[0019] Figure 5 This is a cross-sectional view of the cylindrical structure of this utility model;

[0020] Figure 6 This is a cross-sectional structural schematic diagram of the rotating shaft of this utility model;

[0021] Figure 7 This is a cross-sectional structural diagram of the guide column of this utility model.

[0022] In the diagram: 1. Liquefied natural gas storage tank; 2. Connecting pipe; 3. Connecting plate; 4. Rubber sealing gasket No. 1; 5. Mounting box; 6. Rotating shaft; 7. Rotating pressure plate; 8. Driving rod; 9. Cylinder; 10. Moving plate; 11. Fixed plate No. 1; 12. Single threaded rod; 13. Limiting rod No. 1; 14. Side plate; 15. Sleeve block; 16. Rubber sealing gasket No. 2; 17. Trapezoidal plate; 18. Pressure relief valve; 19. Guide column; 20. Trapezoidal pressure block; 21. Movable plate; 22. Fixed plate No. 2; 23. Double threaded rod; 24. Limiting rod No. 2. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 7As shown, this utility model provides a safety pressure relief device for a liquefied natural gas (LNG) storage tank, including an LNG storage tank 1. A connecting pipe 2 is fixedly connected to the front side of the upper surface of the LNG storage tank 1. A connecting plate 3 is fixedly connected to the top end of the connecting pipe 2. A first rubber sealing gasket 4 is movably connected to the upper surface of the connecting plate 3. An installation box 5 is fixedly connected to the upper surface of the first rubber sealing gasket 4. The inner surface of the installation box 5 and the outer surface of the connecting plate 3 are movably sleeved. Two rotating shafts 6 are movably sleeved on both sides of the front surface of the installation box 5. The rear ends of both rotating shafts 6 penetrate the installation box 5 and extend to the rear side of the installation box 5. The outer surfaces of the two rotating shafts 6 are... A rotating pressure plate 7 is fixedly sleeved inside the mounting box 5 on each surface. A driving rod 8 located on the front side of the mounting box 5 is fixedly sleeved on the outer surface of the two rotating shafts 6. A cylinder 9 is movably connected to the inner surface of the driving rod 8. A movable plate 10 located on the front side of the driving rod 8 is fixedly sleeved on the outer surface of the cylinder 9. A first fixed plate 11 is fixedly connected to the upper and lower sides of the front surface of the mounting box 5. A single threaded rod 12 is movably sleeved in the middle of the upper surface of the first fixed plate 11. The bottom end of the single threaded rod 12 passes through the first fixed plate 11 and the movable plate 10 in sequence and extends to the lower side of the first fixed plate 11. The outer surface of the single threaded rod 12 and the inner surface of the movable plate 10 are threadedly sleeved.

[0025] When the single-threaded rod 12 starts to rotate, the entire moving plate 10 will start to move upward under the drive of the single-threaded rod 12. The movement of the cylinder 9 will drive the driving rod 8, thereby causing the driving rod 8, the rotating pressure plate 7 and the rotating shaft 6 to rotate, and finally causing the two rotating pressure plates 7 to press against the lower surface of the connecting plate 3.

[0026] Among them, a first limiting rod 13 is fixedly sleeved on both the left and right sides of the upper surface of the first fixed plate 11. The bottom end of the first limiting rod 13 passes through the first fixed plate 11 and the moving plate 10 in sequence and extends to the lower surface of the first fixed plate 11. The outer surface of the first limiting rod 13 and the inner surface of the moving plate 10 are movably sleeved.

[0027] The design of the first limit rod 13 serves to restrict the overall movement direction of the moving plate 10.

[0028] The mounting box 5 has side plates 14 fixedly connected to the outer surfaces of both sides. The mounting box 5 has a socket block 15 fixedly connected to the upper surface. The socket block 15 has a second rubber sealing gasket 16 movably connected to the upper surface. The second rubber sealing gasket 16 has a trapezoidal plate 17 fixedly connected to the upper surface. The inner surfaces of the trapezoidal plate 17 and the second rubber sealing gasket 16 are both fixedly fitted with pressure relief valves 18. The bottom end of the outer surface of the pressure relief valve 18 is movably fitted with the inner surface of the socket block 15.

[0029] The design of the No. 2 rubber sealing gasket 16 serves to seal the joint between the pressure relief valve 18 and the sleeve block 15.

[0030] Among them, the upper surface of the sleeve block 15 is fixedly connected to the guide post 19 located outside the second rubber sealing gasket 16. The top end of the guide post 19 passes through the trapezoidal plate 17 and extends to the top of the second rubber sealing gasket 16. The outer surface of the guide post 19 and the inner surface of the trapezoidal plate 17 are movably sleeved.

[0031] The design of the guide post 19 and the trapezoidal plate 17 serves to prevent the pressure relief valve 18 from rotating.

[0032] Among them, trapezoidal pressure blocks 20 are movably connected to both the left and right sides of the outer surface of the trapezoidal plate 17. There are two trapezoidal pressure blocks 20. The lower surface of each trapezoidal pressure block 20 is fixedly connected to a movable plate 21. The lower surface of the movable plate 21 is movably connected to the upper surface of the mounting box 5.

[0033] The design of the trapezoidal pressure block 20 and the trapezoidal plate 17 ensures that the opposing movement of the two trapezoidal pressure blocks 20 will compress the trapezoidal plate 17, thereby causing the trapezoidal plate 17 to press down tightly against the second rubber sealing gasket 16, ensuring that no gas will leak out through the second rubber sealing gasket 16.

[0034] The mounting box 5 has a second fixing plate 22 fixedly connected to both the left and right sides of the upper surface. A double-threaded rod 23 is movably sleeved on the rear side of the left surface of the second fixing plate 22. The right end of the double-threaded rod 23 passes through the second fixing plate 22 and the movable plate 21 in sequence and extends to the right side of the second fixing plate 22. The outer surface of the double-threaded rod 23 and the inner surface of the movable plate 21 are threaded together.

[0035] The rotation of the double-threaded rod 23 will drive the two movable plates 21, thereby causing the two movable plates 21 to move towards and away from each other as a whole.

[0036] Among them, the front side of the right surface of the second fixed plate 22 is fixedly connected to the second limiting rod 24. The left end of the second limiting rod 24 passes through the second fixed plate 22 and the movable plate 21 in sequence and extends to the left surface of the second fixed plate 22. The outer surface of the second limiting rod 24 and the inner surface of the movable plate 21 are movably connected.

[0037] The design of the second limiting rod 24 serves to restrict the overall movement direction of the two movable plates 21.

[0038] Working principle and usage process of this utility model:

[0039] When the operator needs to install the mounting box 5 onto the connecting plate 3, the operator first places the first rubber sealing gasket 4 on top of the connecting plate 3. Then, the operator rotates the single-threaded rod 12. As the single-threaded rod 12 rotates, the moving plate 10 and the cylinder 9 will begin to move upward. The movement of the cylinder 9 will drive the driving rod 8, which will cause the driving rod 8 and the rotating pressure plate 7 to start rotating around the rotating shaft 6. Finally, the two rotating pressure plates 7 will press against the lower surface of the connecting plate 3, thereby fixing the mounting box 5 onto the connecting plate 3.

[0040] When the operator needs to disassemble the pressure relief valve 18, the operator directly rotates the double-threaded rod 23. As the double-threaded rod 23 rotates, the two movable plates 21 will move in opposite directions along the outer surface of the second limit rod 24 under the drive of the double-threaded rod 23. When the two trapezoidal pressure blocks 20 no longer block the trapezoidal plate 17, the operator can directly pull out the trapezoidal plate 17 and the pressure relief valve 18 as a whole, which makes it convenient to replace or maintain them.

[0041] The above describes the basic principles, main features, and advantages of this utility model. All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. Furthermore, the circuit connections and system control methods also adopt conventional connection methods in the prior art, which will not be detailed here.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety pressure relief device for a liquefied natural gas storage tank, comprising a liquefied natural gas storage tank (1), characterized in that: A connecting pipe (2) is fixedly connected to the front side of the upper surface of the liquefied natural gas storage tank (1). A connecting plate (3) is fixedly connected to the top end of the connecting pipe (2). A first rubber sealing gasket (4) is movably connected to the upper surface of the connecting plate (3). An installation box (5) is fixedly connected to the upper surface of the first rubber sealing gasket (4). The inner surface of the installation box (5) and the outer surface of the connecting plate (3) are movably sleeved. Rotating shafts (6) are movably sleeved on both the left and right sides of the front surface of the installation box (5). There are two rotating shafts (6). The rear ends of the two rotating shafts (6) penetrate the installation box (5) and extend to the rear side of the installation box (5). Rotating shafts located inside the installation box (5) are fixedly sleeved on the outer surfaces of the two rotating shafts (6). The pressure plate (7) and the outer surfaces of the two rotating shafts (6) are fixedly sleeved with a driving rod (8) located in front of the mounting box (5). The inner surface of the driving rod (8) is movably connected with a cylinder (9). The outer surface of the cylinder (9) is fixedly sleeved with a moving plate (10) located in front of the driving rod (8). The upper and lower sides of the front surface of the mounting box (5) are fixedly connected with a first fixing plate (11). The middle part of the upper surface of the first fixing plate (11) is movably sleeved with a single thread rod (12). The bottom end of the single thread rod (12) passes through the first fixing plate (11) and the moving plate (10) in sequence and extends to the lower side of the first fixing plate (11). The outer surface of the single thread rod (12) and the inner surface of the moving plate (10) are threaded together.

2. The safety pressure relief device for a liquefied natural gas storage tank according to claim 1, characterized in that: On the left and right sides of the upper surface of the first fixed plate (11), a first limiting rod (13) is fixedly sleeved. The bottom end of the first limiting rod (13) passes through the first fixed plate (11) and the moving plate (10) in sequence and extends to the lower surface of the first fixed plate (11). The outer surface of the first limiting rod (13) and the inner surface of the moving plate (10) are movably sleeved.

3. The safety pressure relief device for a liquefied natural gas storage tank according to claim 1, characterized in that: Side plates (14) are fixedly connected to the outer surfaces of both sides of the mounting box (5). A sleeve block (15) is fixedly connected to the upper surface of the mounting box (5). A second rubber sealing gasket (16) is movably connected to the upper surface of the sleeve block (15). A trapezoidal plate (17) is fixedly connected to the upper surface of the second rubber sealing gasket (16). A pressure relief valve (18) is fixedly sleeved on the inner surfaces of the trapezoidal plate (17) and the second rubber sealing gasket (16). The bottom end of the outer surface of the pressure relief valve (18) is movably sleeved on the inner surface of the sleeve block (15).

4. A safety pressure relief device for a liquefied natural gas storage tank according to claim 3, characterized in that: The upper surface of the sleeve block (15) is fixedly connected to a guide post (19) located outside the second rubber sealing gasket (16). The top end of the guide post (19) passes through the trapezoidal plate (17) and extends above the second rubber sealing gasket (16). The outer surface of the guide post (19) and the inner surface of the trapezoidal plate (17) are movably sleeved together.

5. A safety pressure relief device for a liquefied natural gas storage tank according to claim 3, characterized in that: Trapezoidal pressure blocks (20) are movably connected to both sides of the outer surface of the trapezoidal plate (17). There are two trapezoidal pressure blocks (20). Movable plates (21) are fixedly connected to the lower surfaces of the two trapezoidal pressure blocks (20). The lower surface of the movable plates (21) is movably connected to the upper surface of the mounting box (5).

6. A safety pressure relief device for a liquefied natural gas storage tank according to claim 1, characterized in that: The mounting box (5) has two fixed plates (22) fixedly connected to the left and right sides of its upper surface. A double-threaded rod (23) is movably sleeved on the rear side of the left surface of the second fixed plate (22). The right end of the double-threaded rod (23) passes through the second fixed plate (22) and the movable plate (21) in sequence and extends to the right side of the second fixed plate (22). The outer surface of the double-threaded rod (23) and the inner surface of the movable plate (21) are threaded together.

7. A safety pressure relief device for a liquefied natural gas storage tank according to claim 6, characterized in that: The front side of the right surface of the second fixed plate (22) is fixedly connected to the second limiting rod (24). The left end of the second limiting rod (24) passes through the second fixed plate (22) and the movable plate (21) in sequence and extends to the left surface of the second fixed plate (22). The outer surface of the second limiting rod (24) and the inner surface of the movable plate (21) are movably connected.

Images