An integrated LNG vehicle-mounted gas cylinder for filling and returning gas

Abstract

The present invention discloses an integrated filling and return gas LNG vehicle-mounted gas cylinder, which relates to the technical field of LNG vehicle-mounted gas cylinders, and comprises a base, a tank body is fixedly mounted on the bottom of the base, a valve is fixedly mounted on the left side of the tank body, a protective device is arranged on the top of the base, a clamping device is arranged on the bottom of the tank body, and an anti-leakage device is arranged in front of the valve, the protective device comprises a fixed block, an L-shaped sliding rod, a push plate, a gear rod, a protective cover, a protective plate and a movable plate, the protective plate is slidably mounted on the inner wall of the protective cover, and the movable plate is fixedly mounted on the top of the L-shaped sliding rod to ensure that the tank body can be firmly fixed to the base when it is collided or hit, thereby reducing the movement of the tank body in the collision, reducing the impact force on the tank body, and preventing the tank body from excessively moving and causing damage in the collision.

Description

Technical Field

[0001] The invention relates to the technical field of LNG vehicle-mounted gas cylinders, and in particular to a filling and return gas integrated LNG vehicle-mounted gas cylinder. Background Art

[0002] LNG vehicle cylinders are containers specifically used to store liquefied natural gas (LNG), usually installed on vehicles for use in power systems. They are made of high-strength materials and can withstand low temperatures and high pressures to ensure safe storage and transportation of gas.

[0003] The patent with the patent announcement number CN205299056U relates to the technical field of LNG vehicle-mounted gas cylinders. The patent discloses an LNG vehicle-mounted gas cylinder, which includes an LNG vehicle-mounted gas cylinder, a pressurized liquid outlet pipe provided on the LNG vehicle-mounted gas cylinder, a vaporizer connected to the pressurized liquid outlet pipe, a filling and returning gas integrated device connected to the LNG vehicle-mounted gas cylinder, and a gas cylinder protective cover provided on the LNG vehicle-mounted gas cylinder. The patent has made great changes to the LNG vehicle-mounted gas cylinder as a whole, solving the overfilling and safety hazards and avoiding the waste of LNG. The space is greatly reduced, making the gas cylinder safer, and improving the conversion efficiency when the liquid fuel is converted to liquid. LNG is not easy to flow back into the gas cylinder after being gasified in the process from the internal check valve to the overflow valve. The gas cylinder protective cover is installed on the gas cylinder shell head in a detachable manner, and such a protective cover is easy to replace if it is deformed. LNG is not easy to flow back into the gas cylinder after being gasified in the process from the internal check valve to the overflow valve.

[0004] In the above patent, the cylinder protective cover is detachably mounted on the cylinder shell cover, and such a protective cover is easy to replace if it is deformed. LNG is not easy to flow back into the cylinder after being gasified through the internal check valve to the overflow valve, but the protective cover cannot protect the entire cylinder when it is hit or collided, which may cause some sharp objects or fragments to scratch the cylinder and cause leakage. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a filling and return gas integrated LNG vehicle-mounted gas cylinder, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a filling and return integrated LNG vehicle-mounted gas cylinder includes a base, a tank body is fixedly installed at the bottom of the base, a valve is fixedly installed on the left side of the tank body, a protective device is provided on the top of the base, a clamping device is provided at the bottom of the tank body, and an anti-leakage device is provided in front of the valve;

[0007] Among them, the protective device includes a fixed block, an L-shaped sliding rod, a push plate, a gear rod, a protective cover, a protective plate and a movable plate. The fixed block is fixedly installed on the left side of the base, the L-shaped sliding rod slides through the fixed block, the push plate is fixedly installed between the L-shaped sliding rods, the gear rod is fixedly installed on the top of the L-shaped sliding rod, the protective cover is fixedly installed on the top of the base, the protective plate is slidably installed on the inner wall of the protective cover, and the movable plate is fixedly installed on the top of the L-shaped sliding rod. When the tank body accidentally collides or hits during use, the push plate is pushed during the collision or collision, and the movement of the push plate drives the L-shaped sliding rod to start moving, the movement of the L-shaped sliding rod drives the gear rod to start moving, and the movement of the gear rod releases the restriction on the protective plate.

[0008] According to the above technical solution, the protective device also includes a fixed rod, a vertical block and a clamping block. The fixed rod is fixedly installed on the left side of the base, the vertical block is fixedly installed on the top of the fixed rod, and the clamping block is rotatably installed between the vertical blocks. When the protective plate slides to the bottom of the base, the clamping block is pressed to rotate, and the rotation of the clamping block restricts the protective plate to the bottom of the base.

[0009] According to the above technical solution, a No. 1 spring is provided between the fixed block and the movable plate to ensure that the L-shaped slide bar can return to its original position under the push of the No. 1 spring when returning to its original position, thereby preventing position deviation caused by manual restoration.

[0010] According to the above technical solution, the clamping device includes a telescopic rod, a splint, a connecting rod and a pull rod. The telescopic rod slides through the bottom of the tank body, the splint is fixedly installed at the end of the telescopic rod away from the bottom of the tank body, the connecting rod is fixedly installed between the two splints, and the pull rod is fixedly installed on the right side of the connecting rod. When a collision or impact occurs, the push plate moves to drive the L-shaped sliding rod to start moving, the L-shaped sliding rod moves to push the pull rod to start moving, the pull rod moves to drive the connecting rod to start moving, and the connecting rod moves to drive the splint to start moving.

[0011] According to the above technical scheme, the clamping device also includes a No. 1 hydraulic cylinder, a No. 1 hydraulic push plate, a No. 1 hydraulic push rod, a No. 2 hydraulic cylinder, a No. 2 hydraulic push plate and a No. 2 hydraulic push rod. The No. 1 hydraulic cylinder is fixedly installed inside the base, the No. 1 hydraulic push plate is slidably installed on the inner wall of the No. 1 hydraulic cylinder, the No. 1 hydraulic push rod is fixedly installed on the left side of the No. 1 hydraulic push plate, the No. 2 hydraulic cylinder is fixedly installed on the top of the tank body, the No. 2 hydraulic push plate is slidably installed on the inner wall of the No. 2 hydraulic cylinder, and the No. 2 hydraulic push rod is fixedly installed on the right side of the No. 2 hydraulic push plate. When the pull rod moves, it pushes the No. 1 hydraulic push rod to start moving, and the No. 1 hydraulic push rod moves to drive the No. 1 hydraulic push plate to start moving. The No. 1 hydraulic push plate moves to squeeze the liquid inside the No. 1 hydraulic cylinder so that the liquid flows to the No. 2 hydraulic cylinder through the hydraulic pipe, and the liquid squeezes the No. 2 hydraulic push plate inside the No. 2 hydraulic cylinder to make it start moving.

[0012] According to the above technical solution, the side where the pull rod and the L-shaped sliding rod contact each other is set as an inclined surface, the No. 1 hydraulic cylinder is connected with the No. 2 hydraulic cylinder through a hydraulic pipe, the interiors of the No. 1 hydraulic cylinder and the No. 2 hydraulic cylinder are both filled with liquid, and a No. 2 spring is provided between the free ends of the two telescopic rods. By setting the inclined surface, it is ensured that the L-shaped sliding rod can be pushed smoothly when pushing the pull rod, the hydraulic pipe is used to ensure that the No. 1 hydraulic cylinder and the No. 2 hydraulic cylinder are connected smoothly, and by setting the No. 2 spring, it is ensured that the telescopic rod can be extended and retracted smoothly.

[0013] According to the above technical solution, the anti-leakage device includes a rotating rod, a gear, a rack, an elastic telescopic rod, a baffle, a No. 1 sealing ring, a connecting port, a No. 2 sealing ring, a clamping rod, a Z-shaped sliding rod, a threaded rod and a sleeve. The rotating rod is fixedly mounted on the valve control end, the gear is fixedly mounted on the bottom of the rotating rod, the rack is slidably mounted on the top of the valve, the fixed end of the elastic telescopic rod is slidably mounted on the top of the valve, the movable end of the elastic telescopic rod is fixedly mounted on the gear, the baffle is fixedly mounted on the front of the elastic telescopic rod, the No. 1 sealing ring is fixedly mounted on the back of the baffle, and the connecting port is fixedly mounted At the front of the valve, the No. 2 sealing ring is fixedly installed at the front of the connecting port, the clamping rod is slidably installed inside the valve, a sliding groove is opened on the top of the valve, the Z-shaped sliding rod is slidably installed in the sliding groove on the top of the valve, a threaded groove is opened on the top of the valve, the threaded rod is threadedly installed inside the threaded groove, the sleeve is rotatably connected to the threaded rod, the sleeve is slidably installed in the threaded groove, the valve is closed, the connection between the external pipeline and the tank body is released, and then the rotating rod is rotated. The rotation of the rotating rod drives the gear to start rotating, the rotation of the gear drives the rack to start moving, and the movement of the rack drives the elastic telescopic rod to start moving.

[0014] According to the above technical solution, the gear is meshed with the rack, the threaded rod is threadedly connected to the sleeve, a No. 3 spring is provided between the clamping rod and the valve, a No. 4 spring is provided between the Z-shaped slide rod and the valve, and a No. 5 spring is provided between the valve and the baffle. The meshing of the gear and the rack ensures that the rack can be driven to move when the gear rotates, and the threaded connection between the threaded rod and the valve ensures that the threaded rod can move inside the valve. The provision of the No. 3 spring ensures that the clamping rod can achieve automatic reset, the provision of the No. 4 spring ensures that the Z-shaped slide rod can achieve automatic reset, and the provision of the No. 5 spring ensures that the baffle can achieve automatic reset.

[0015] The present invention provides a filling and return gas integrated LNG vehicle-mounted gas cylinder, which has the following beneficial effects:

[0016] (1) The invention releases the restriction on the protective plate by moving the lever. After the restriction is released, the protective plate slides downward under the action of gravity. When the protective plate reaches the bottom of the base, it protects the entire tank body to provide additional physical protection, thereby reducing the damage to the tank body caused by external impact. At the same time, the protective plate is restricted to the bottom of the base by rotating the clamp block, ensuring that the protective plate will not rebound due to the elastic potential energy generated by contact with the base to prevent the tank body from contacting with foreign objects and colliding with them during rebound, thereby causing damage to the tank body. At the same time, after the clamp block restricts the protective plate, it can ensure that the protective plate is in the correct position to provide additional protection, thereby reducing the impact of external impact on the tank body.

[0017] (2) The invention continuously clamps the base by means of the clamping plate while continuously moving, thereby ensuring that the tank body can be firmly fixed to the base when it is hit or colliding, reducing the movement of the tank body during the collision, reducing the impact force on the tank body, and preventing the tank body from being damaged by excessive movement during the collision. At the same time, the No. 2 hydraulic push plate moves to push the No. 2 hydraulic push rod to start moving. The movement of the No. 2 hydraulic push rod will get stuck in the bottom of the tank body, restricting the tank body to ensure that the tank body can be fixed and positioned in the event of a collision, preventing it from shaking and reducing damage to the connecting parts.

[0018] (3) The invention drives the No. 1 sealing ring to start moving by the movement of the baffle plate. The No. 1 sealing ring moves to the front of the No. 2 sealing ring and fits tightly with it to ensure that the connection port can be sealed when the tank is no longer in use, which can effectively prevent the leakage of liquefied natural gas and ensure safety. It also prevents unexpected reactions caused by external factors, such as fire or explosion, and increases the safety of use. At the same time, when the baffle plate moves to the front of the clamping rod, it pushes the clamping rod to retract backwards and then restricts the baffle plate to ensure that the baffle plate will not cause the No. 1 sealing ring and the No. 2 sealing ring to be separated from each other due to accidental touch or other reasons when the tank is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the structure of the protective device of the present invention;

[0022] Figure 4 It is a cross-sectional schematic diagram of the L-shaped sliding rod and the push plate structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the vertical block and the card block of the present invention;

[0024] Figure 6 It is a schematic cross-sectional view of the structure of the clamping device of the present invention;

[0025] Figure 7 It is a schematic cross-sectional view of the structure of the anti-leakage device of the present invention;

[0026] Figure 8 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A.

[0027] In the figure: 1, base; 2, tank; 201, valve; 301, fixed block; 302, L-shaped slide bar; 303, push plate; 304, gear lever; 305, protective cover; 306, protective plate; 307, moving plate; 308, fixed rod; 309, vertical block; 310, clamping block; 401, telescopic rod; 402, clamping plate; 403, connecting rod; 404, pull rod; 405, No. 1 hydraulic cylinder; 406, No. 1 hydraulic cylinder Push plate; 407, hydraulic push rod No. 1; 408, hydraulic cylinder No. 2; 409, hydraulic push plate No. 2; 410, hydraulic push rod No. 2; 501, rotating rod; 502, gear; 503, rack; 504, elastic telescopic rod; 505, baffle; 506, sealing ring No. 1; 507, connecting port; 508, sealing ring No. 2; 509, clamping rod; 510, Z-shaped sliding rod; 511, threaded rod; 512, sleeve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 8 , one embodiment of the present invention is: a filling and return integrated LNG vehicle-mounted gas cylinder comprises a base 1, a tank body 2 is fixedly mounted on the bottom of the base 1, a valve 201 is fixedly mounted on the left side of the tank body 2, and a protective device is arranged on the top of the base 1;

[0030] Among them, the protective device includes a fixed block 301, an L-shaped slide bar 302, a push plate 303, a gear rod 304, a protective cover 305, a protective plate 306 and a movable plate 307. The fixed block 301 is fixedly installed on the left side of the base 1, the L-shaped slide bar 302 slides through the fixed block 301, the push plate 303 is fixedly installed between the L-shaped slide bars 302, the gear rod 304 is fixedly installed on the top of the L-shaped slide bar 302, the protective cover 305 is fixedly installed on the top of the base 1, the protective plate 306 is slidably installed on the inner wall of the protective cover 305, and the movable plate 307 is fixedly installed on the top of the L-shaped slide bar 302. The restriction on the protective plate 306 is released by moving the gear rod 304. After the restriction is released, the protective plate 306 slides downward under the action of gravity. When the protective plate 306 reaches the bottom of the base 1, the entire tank body 2 is protected to provide additional physical protection and reduce the damage to the tank body 2 caused by external impact.

[0031] The protective device also includes a fixed rod 308, a vertical block 309 and a clamping block 310. The fixed rod 308 is fixedly installed on the left side of the base 1, the vertical block 309 is fixedly installed on the top of the fixed rod 308, and the clamping block 310 is rotatably installed between the vertical blocks 309. The clamping block 310 is rotated to limit the protective plate 306 to the bottom of the base 1, ensuring that the protective plate 306 will not rebound due to the elastic potential energy generated by contact with the base 1 to prevent the tank body 2 from contacting with foreign objects and colliding with them during rebound, thereby causing damage to the tank body 2. At the same time, after the clamping block 310 limits the protective plate 306, it can ensure that the protective plate 306 is in the correct position to provide additional protection and reduce the impact of external impact on the tank body 2.

[0032] A spring No. 1 is provided between the fixed block 301 and the movable plate 307 to ensure that the L-shaped slide bar 302 can return to its original position under the push of the spring No. 1 when returning to its original position, thereby preventing position deviation caused by manual restoration.

[0033] When the embodiment is working, when the tank body 2 is accidentally collided or hit during use, the push plate 303 is pushed during the collision, and the push plate 303 moves to drive the L-shaped slide bar 302 to start moving, and the L-shaped slide bar 302 moves to drive the gear lever 304 to start moving, and the gear lever 304 moves to release the restriction on the protective plate 306. After the restriction is released, the protective plate 306 slides downward under the action of gravity, and when the protective plate 306 reaches the bottom of the base 1, it protects the entire tank body 2 to provide additional physical protection, thereby reducing the damage to the tank body 2 caused by external impact. When the protective plate 306 slides to the bottom of the base 1, the block 310 is pressed to rotate the block 310. The rotation of the block 310 restricts the protective plate 306 to the bottom of the base 1, ensuring that the protective plate 306 will not rebound due to the elastic potential energy generated by the contact with the base 1 to prevent the tank body 2 from contacting with foreign objects and colliding with them during the rebound, thereby causing damage to the tank body 2. At the same time, after the block 310 restricts the protective plate 306, it can ensure that the protective plate 306 is in the correct position to provide additional protection and reduce the impact of external shocks on the tank body 2.

[0034] See also Figure 1-Figure 8 On the basis of the above embodiment, in another embodiment of the present invention, a clamping device is provided at the bottom of the tank body 2, and a leakage prevention device is provided at the front of the valve 201. The clamping device includes a telescopic rod 401, a clamping plate 402, a connecting rod 403 and a pull rod 404. The telescopic rod 401 slides through the bottom of the tank body 2, the clamping plate 402 is fixedly installed at the end of the telescopic rod 401 away from the bottom of the tank body 2, the connecting rod 403 is fixedly installed between the two clamping plates 402, and the pull rod 404 is fixedly installed on the right side of the connecting rod 403. The clamping plate 402 is continuously moved to clamp the base 1 to ensure that the tank body 2 can be firmly fixed to the base 1 when it is collided or hit, thereby reducing the movement of the tank body 2 in the collision, reducing the impact force on the tank body 2, and preventing the tank body 2 from excessively moving and causing damage during the collision.

[0035] The clamping device also includes a No. 1 hydraulic cylinder 405, a No. 1 hydraulic push plate 406, a No. 1 hydraulic push rod 407, a No. 2 hydraulic cylinder 408, a No. 2 hydraulic push plate 409 and a No. 2 hydraulic push rod 410. The No. 1 hydraulic cylinder 405 is fixedly installed inside the base 1, the No. 1 hydraulic push plate 406 is slidably installed on the inner wall of the No. 1 hydraulic cylinder 405, the No. 1 hydraulic push rod 407 is fixedly installed on the left side of the No. 1 hydraulic push plate 406, the No. 2 hydraulic cylinder 408 is fixedly installed on the top of the tank body 2, the No. 2 hydraulic push plate 409 is slidably installed on the inner wall of the No. 2 hydraulic cylinder 408, and the No. 2 hydraulic push rod 410 is fixedly installed on the right side of the No. 2 hydraulic push plate 409. At the same time, the No. 2 hydraulic push plate 409 moves to push the No. 2 hydraulic push rod 410 to start moving. The No. 2 hydraulic push rod 410 moves and will be stuck in the bottom of the tank body 2, restricting the tank body 2 to ensure that the tank body 2 can be fixed and positioned in the event of a collision, preventing it from shaking and reducing damage to the connecting parts.

[0036] The contacting surface of the pull rod 404 and the L-shaped slide bar 302 is set as an inclined surface, the No. 1 hydraulic cylinder 405 is connected with the No. 2 hydraulic cylinder 408 through a hydraulic pipe, the interiors of the No. 1 hydraulic cylinder 405 and the No. 2 hydraulic cylinder 408 are both filled with liquid, and a No. 2 spring is provided between the free ends of the two telescopic rods 401. By setting the inclined surface, it is ensured that the L-shaped slide bar 302 can be pushed smoothly when pushing the pull rod 404, and the hydraulic pipe is used to ensure that the No. 1 hydraulic cylinder 405 and the No. 2 hydraulic cylinder 408 are connected smoothly, and by setting the No. 2 spring, it is ensured that the telescopic rod 401 can be extended and retracted smoothly.

[0037] The anti-leakage device includes a rotating rod 501, a gear 502, a rack 503, an elastic telescopic rod 504, a baffle 505, a No. 1 sealing ring 506, a connecting port 507, a No. 2 sealing ring 508, a clamping rod 509, a Z-shaped sliding rod 510, a threaded rod 511 and a sleeve 512. The rotating rod 501 is fixedly installed at the control end of the valve 201, the gear 502 is fixedly installed at the bottom of the rotating rod 501, the rack 503 is slidably installed at the top of the valve 201, the fixed end of the elastic telescopic rod 504 is slidably installed at the top of the valve 201, the movable end of the elastic telescopic rod 504 is fixedly installed at the gear 502, the baffle 505 is fixedly installed at the front of the elastic telescopic rod 504, the No. 1 sealing ring 506 is fixedly installed at the back of the baffle 505, the connecting port 507 is fixedly installed at the front of the valve 201, and the No. 2 sealing ring 508 is fixedly installed at the front of the connecting port 507, the clamping rod 509 is slidably installed inside the valve 201, a sliding groove is opened at the top of the valve 201, the Z-shaped sliding rod 510 is slidably installed in the sliding groove at the top of the valve 201, a threaded groove is opened at the top of the valve 201, the threaded rod 511 is threadedly installed inside the threaded groove, the sleeve 512 is rotatably connected with the threaded rod 511, the sleeve 512 is slidably installed in the threaded groove, and the movement of the baffle 505 drives the No. 1 sealing ring 506 to start moving, and the No. 1 sealing ring 506 moves to the front of the No. 2 sealing ring 508 and fits tightly with it to ensure that the connecting port 507 can be sealed when the tank body 2 is no longer in use, which can effectively prevent the leakage of liquefied natural gas, ensure safety, prevent unexpected reactions caused by external factors, such as fire or explosion, etc., and increase the safety of use.

[0038] The gear 502 is meshed with the rack 503, the threaded rod 511 is threadedly connected to the valve 201, the sleeve 512 is in contact with the rack 503, a No. 3 spring is provided between the clamping rod 509 and the valve 201, a No. 4 spring is provided between the Z-shaped slide bar 510 and the valve 201, and a No. 5 spring is provided between the valve 201 and the baffle 505. The meshing of the gear 502 and the rack 503 ensures that the rack 503 can be driven to move when the gear 502 rotates, the threaded rod 511 is threadedly connected to the thread groove to ensure that the threaded rod 511 can move inside the thread groove, the No. 3 spring is provided to ensure that the clamping rod 509 can achieve elastic expansion and contraction, the No. 4 spring is provided to ensure that the Z-shaped slide bar 510 can achieve automatic reset, and the No. 5 spring is provided to ensure that the baffle 505 can achieve automatic reset.

[0039] When this embodiment is working: when a collision or impact occurs, the push plate 303 moves to drive the L-shaped slide bar 302 to start moving, the L-shaped slide bar 302 moves to push the pull rod 404 to start moving, the pull rod 404 moves to drive the connecting rod 403 to start moving, the connecting rod 403 moves to drive the clamping plate 402 to start moving, and the clamping plate 402 continues to clamp the base 1 under continuous movement to ensure that the tank body 2 can be firmly fixed to the base 1 when it is collided or impacted, reduce the movement of the tank body 2 in the collision, reduce the impact force on the tank body 2, and prevent the tank body 2 from excessively moving and causing damage during the collision. At the same time, when the pull rod 404 moves, it pushes the No. 1 hydraulic Push rod 407 starts to move, the movement of No. 1 hydraulic push rod 407 drives No. 1 hydraulic push plate 406 to start moving, the No. 1 hydraulic push plate 406 moves to squeeze the liquid inside the No. 1 hydraulic cylinder 405 so that the liquid flows to the inside of No. 2 hydraulic cylinder 408 through the hydraulic pipe, and the liquid squeezes the No. 2 hydraulic push plate 409 inside the No. 2 hydraulic cylinder 408 to make it start moving, and the No. 2 hydraulic push plate 409 moves to push the No. 2 hydraulic push rod 410 to start moving, and the No. 2 hydraulic push rod 410 moves and gets stuck in the bottom of the tank body 2, restricting the tank body 2 to ensure that the tank body 2 can be fixed and positioned in the event of a collision, preventing it from shaking and reducing damage to the connecting parts.

[0040] When the tank body 2 stops being used, the threaded rod 511 is first rotated so that the threaded rod 511 drives the sleeve 512 to move in the threaded groove, so that the sleeve 512 no longer pushes the rack 503, and then the rack 503 is disengaged from the meshing state with the gear 502 under the pulling force of the elastic telescopic rod 504, and then the rotating rod 501 is rotated. The rotation of the rotating rod 501 will drive the control end of the valve 201 to rotate, so that the valve 201 rotating rod 501, and then the connection between the external pipeline and the tank body 2 is released. After the external pipeline is removed, the Z-shaped slide bar 510 is no longer restricted by the external pipeline and slides forward under the action of the No. 4 spring. The sliding of the Z-shaped slide bar 510 releases the restriction on the rack 503. After the restriction is released, the rack 503 begins to move under the pulling force of the No. 5 spring, and the movement of the rack 503 drives the elastic telescopic rod 504 to move. The retractable rod 504 starts to move, and the movement of the elastic telescopic rod 504 drives the baffle 505 to start moving. The movement of the baffle 505 drives the No. 1 sealing ring 506 to start moving. The No. 1 sealing ring 506 moves to the front of the No. 2 sealing ring 508 and fits tightly with it to ensure that the connection port 507 can be sealed when the tank body 2 is no longer in use, which can effectively prevent the leakage of liquefied natural gas and ensure safety. It prevents unexpected reactions caused by external factors, such as fire or explosion, and increases the safety of use. At the same time, when the baffle 505 moves to the front of the clamping rod 509, it pushes the clamping rod 509 to retract backwards and then restricts the baffle 505 to ensure that the baffle 505 will not cause the No. 1 sealing ring 506 and the No. 2 sealing ring 508 to be separated from the seal due to accidental touch or other reasons during the period when the tank body 2 is out of use.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filling and return integrated LNG vehicle-mounted gas cylinder, comprising a base, characterized in that: A tank body is fixedly installed at the bottom of the base, a valve is fixedly installed on the left side of the tank body, a protective device is arranged on the top of the base, a clamping device is arranged at the bottom of the tank body, and an anti-leakage device is arranged in front of the valve; Wherein, the protective device comprises a fixed block, an L-shaped slide bar, a push plate, a shift rod, a protective cover, a protective plate and a movable plate, wherein the fixed block is fixedly mounted on the left side of the base, the L-shaped slide bar slides through the fixed block, the push plate is fixedly mounted between the L-shaped slide bars, the shift rod is fixedly mounted on the top of the L-shaped slide bar, the protective cover is fixedly mounted on the top of the base, the protective plate is slidably mounted on the inner wall of the protective cover, and the movable plate is fixedly mounted on the top of the L-shaped slide bar; The protective device also includes a fixed rod, a vertical block and a clamping block, wherein the fixed rod is fixedly mounted on the left side of the base, the vertical block is fixedly mounted on the top of the fixed rod, and the clamping block is rotatably mounted between the vertical blocks; A spring No. 1 is provided between the fixed block and the movable plate; The clamping device includes two telescopic rods, a clamping plate, a connecting rod and a pull rod. The telescopic rod slides through the bottom of the tank body, the clamping plate is fixedly installed at one end of the telescopic rod away from the bottom of the tank body, the connecting rod is fixedly installed between the two clamping plates, and the pull rod is fixedly installed on the right side of the connecting rod.

2. The filling and return integrated LNG vehicle-mounted gas cylinder according to claim 1, characterized in that: The clamping device also includes a No. 1 hydraulic cylinder, a No. 1 hydraulic push plate, a No. 1 hydraulic push rod, a No. 2 hydraulic cylinder, a No. 2 hydraulic push plate and a No. 2 hydraulic push rod. The No. 1 hydraulic cylinder is fixedly installed inside the base, the No. 1 hydraulic push plate is slidably installed on the inner wall of the No. 1 hydraulic cylinder, the No. 1 hydraulic push rod is fixedly installed on the left side of the No. 1 hydraulic push plate, the No. 2 hydraulic cylinder is fixedly installed on the top of the tank body, the No. 2 hydraulic push plate is slidably installed on the inner wall of the No. 2 hydraulic cylinder, and the No. 2 hydraulic push rod is fixedly installed on the right side of the No. 2 hydraulic push plate.

3. The filling and return integrated LNG vehicle-mounted gas cylinder according to claim 2, characterized in that: The contacting surface of the pull rod and the L-shaped slide rod is set as an inclined surface, the No. 1 hydraulic cylinder is connected with the No. 2 hydraulic cylinder through a hydraulic pipe, the interiors of the No. 1 hydraulic cylinder and the No. 2 hydraulic cylinder are both filled with liquid, and a No. 2 spring is provided between the free ends of the two telescopic rods.

4. The filling and return integrated LNG vehicle-mounted gas cylinder according to claim 3 is characterized in that: The anti-leakage device includes a rotating rod, a gear, a rack, an elastic telescopic rod, a baffle, a No. 1 sealing ring, a connecting port, a No. 2 sealing ring, a clamping rod, a Z-shaped sliding rod, a threaded rod and a sleeve. The rotating rod is fixedly installed at the valve control end, the gear is fixedly installed at the bottom of the rotating rod, the rack is slidably installed at the top of the valve, the fixed end of the elastic telescopic rod is slidably installed at the top of the valve, the movable end of the elastic telescopic rod is fixedly installed at the gear, the baffle is fixedly installed at the front of the elastic telescopic rod, the No. 1 sealing ring is fixedly installed at the back of the baffle, the connecting port is fixedly installed at the front of the valve, the No. 2 sealing ring is fixedly installed at the front of the connecting port, the clamping rod is slidably installed inside the valve, a sliding groove is opened at the top of the valve, the Z-shaped sliding rod is slidably installed in the sliding groove at the top of the valve, a threaded groove is opened at the top of the valve, the threaded rod is threadedly installed inside the threaded groove, the sleeve is rotatably connected to the threaded rod, and the sleeve is slidably installed in the threaded groove.

5. The filling and return integrated LNG vehicle-mounted gas cylinder according to claim 4, characterized in that: The gear is meshed with the rack, the threaded rod is threadedly connected to the valve, the sleeve is in contact with the rack, a No. 3 spring is provided between the clamping rod and the valve, a No. 4 spring is provided between the Z-shaped sliding rod and the valve, and a No. 5 spring is provided between the valve and the baffle.

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