A pipeline pressure relief device, gas storage system and vehicle

Abstract

The application discloses a pipeline pressure relief device, a gas storage system and a vehicle, and aims at solving the problem that high-pressure gas in a high-pressure pipeline is difficult to discharge after the vehicle collides in the prior art. The pipeline pressure relief device is applied to the gas storage system and comprises a force transmission support, a pilot mechanism and an exhaust valve. The pilot mechanism comprises a cylinder barrel and a piston movably arranged in the cylinder barrel, and the piston is connected with the force transmission support. The exhaust valve comprises a valve body and a valve core, and a driving cavity is communicated with an inner cavity of the cylinder barrel. The piston is driven by the force transmission support to move in the inner cavity of the cylinder barrel, so as to compress the inner cavity of the cylinder barrel, thereby driving the valve core to move in the driving cavity, and the pipeline is conducted to release pressure. The high-pressure gas in the pipeline is discharged by the pure mechanical structure, the hidden danger of flammability and explosiveness caused by the pipeline collision is eliminated, the potential risk caused by the high-pressure gas is reduced, and the reliability is higher in an emergency. In addition, the structure is simple, the occupied space is small, the pipeline can be reasonably arranged according to the actual situation of the vehicle, the practicality is high, and the cost is low.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas storage systems, and particularly relates to a pipeline pressure relief device, a gas storage system and a vehicle. BACKGROUND

[0002] When a hydrogen fuel cell vehicle on-board hydrogen system adopts a high-pressure hydrogen storage mode, the gas pressure in the hydrogen cylinder and the pipeline connected with the hydrogen cylinder can reach 87.5 MPa, and the gas pressure in the pipeline after the pressure relief valve is about 0.8-2 MPa, which is equivalent to 8-860 atmospheres. Therefore, the on-board hydrogen system needs a higher safety design.

[0003] At present, the on-board hydrogen system is arranged according to the structural characteristics of the vehicle. The on-board hydrogen system of a passenger vehicle is generally arranged at the rear of the vehicle, and the on-board hydrogen system of a commercial vehicle is arranged at the rear of the driver's cabin, on the top of the vehicle cabin or on the vehicle chassis. When the vehicle collides, the cylinder valve of the high-pressure hydrogen cylinder of the on-board hydrogen system will quickly close, cutting off the supply of hydrogen gas in the hydrogen cylinder. At this time, the pipeline containing high-pressure hydrogen gas may be deformed or even ruptured, and the high-pressure gas in the pipeline is extremely easy to leak into the vehicle body, causing a fire or explosion. Even if the pipeline does not rupture, the high-pressure gas in the pipeline and the deformed pipeline form an extremely unstable risk, which may rupture at any time and cause hydrogen leakage. Therefore, how to safely discharge the high-pressure hydrogen gas in the pipeline during rescue is a difficult problem. SUMMARY

[0004] To solve the above technical problems, the application provides a pipeline pressure relief device, a gas storage system and a vehicle, which can timely empty the high-pressure gas in the pipeline after the vehicle collides and improve the safety of rescue.

[0005] One technical solution of the application is that the application provides a pipeline pressure relief device applied to a gas storage system, which comprises:

[0006] A force transmission bracket connected to an easily-collided part of a vehicle body;

[0007] A pilot mechanism comprising a cylinder and a piston movably arranged in the cylinder, wherein the piston is connected to the force transmission bracket;

[0008] An exhaust valve for being connected to a pipeline of the gas storage system, comprising a valve body provided with a driving cavity and a valve core movably arranged in the driving cavity, wherein the driving cavity is connected to an inner cavity of the cylinder;

[0009] The piston is driven by the force transmission bracket to move in the inner cavity of the cylinder, so as to compress the inner cavity of the cylinder, thereby driving the valve core to move in the driving cavity, so as to open the pipeline and relieve pressure.

[0010] In some embodiments, the first end of the force transmission bracket is fixedly installed, the second end is connected to the piston, and the thickness of the force transmission bracket has a decreasing trend from the first end to the second end.

[0011] In some embodiments, the force transmission bracket is an arc-shaped shell or a mesh structure, and the arc-shaped force transmission bracket is spacedly arranged on one side of the gas storage mechanism close to the outer surface of the vehicle and covers at least half of the circumference of the side.

[0012] In some embodiments, the first end of the bracket is located below the piston, and the cylinder is arranged at an angle with respect to the axial direction of the gas storage mechanism.

[0013] In some embodiments, the cylinder is connected with a hinge for being hinged to the vehicle, and a plurality of pilot mechanisms are sequentially and spacedly arranged along the axial direction of the gas storage mechanism.

[0014] In some embodiments, the valve body is provided with an interface for connecting a pipeline of the gas storage system, and the valve core is provided with a valve hole, and when the piston compresses the inner cavity of the cylinder, the valve core moves to a position where the valve hole is in communication with the interface.

[0015] In some embodiments, the exhaust valve further comprises an elastic member acting on the valve core and the cavity wall of the driving cavity to drive the valve core to reset when the piston does not compress the inner cavity of the cylinder.

[0016] In some embodiments, the valve core is provided with an observation rod, and the valve body is provided with an observation hole for the observation rod to extend out of the valve body, and when the piston compresses the inner cavity of the cylinder, the observation rod extends out of the valve body through the observation hole.

[0017] Another technical solution of the present application provides a gas storage system, comprising:

[0018] a gas storage mechanism and a pipeline in communication;

[0019] The foregoing pipeline pressure relief device, and the exhaust valve of the pipeline pressure relief device is in communication with the pipeline.

[0020] Still another technical solution of the present application provides a vehicle, comprising:

[0021] a vehicle body;

[0022] The foregoing gas storage system, and the force transmission bracket and the cylinder are connected to the vehicle body.

[0023] The present application has at least the following beneficial effects:

[0024] The present invention provides a pipeline pressure relief device applied to a gas storage system. The force transmission bracket of the pressure relief device is used to connect to the collision-prone parts of the vehicle body, thus transmitting the collision energy of the vehicle. The piston of the pilot mechanism is connected to the force transmission bracket, so the piston can move in the cylinder under the drive of the collision energy transmitted by the force transmission bracket, thereby compressing the inner cavity of the cylinder. The drive cavity of the exhaust valve is connected to the inner cavity of the cylinder, so the valve core in the drive cavity will move in the drive cavity, thereby opening the pipeline, so that the high-pressure gas in the pipeline is discharged from the exhaust valve, thereby reducing the pressure in the pipeline and improving the safety performance during the rescue process.

[0025] If a pipe ruptures due to a collision, gas will be released from the rupture point in a time that takes from tens of seconds to a few minutes. The pipe pressure relief device provided in this application can release the gas in the pipe within a few seconds, preventing the gas from entering the vehicle body and eliminating the risk of fire or explosion.

[0026] The pipeline pressure relief device provided by the present invention has at least the following advantages:

[0027] (1) The high-pressure gas in the pipeline was discharged, eliminating the flammable and explosive hazards caused by pipeline collision and reducing the potential risks caused by high-pressure gas.

[0028] (2) The pipeline pressure relief device uses collision energy as power and adopts a purely mechanical structure to achieve venting. It does not use circuit control and has stronger reliability in emergency situations.

[0029] (3) The pipeline pressure relief device has a simple structure, occupies little space, can be reasonably arranged according to the actual situation of the vehicle, and is highly practical; and the cost is low. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of this application is shown.

[0031] Figure 2 for Figure 1 A structural diagram of a vehicle under impact conditions.

[0032] Figure 3 This is an assembly structure diagram of a gas storage mechanism and a force transmission support according to an embodiment of this application.

[0033] Figure 4 This is an assembly structure diagram of another gas storage mechanism, force transmission support, and pilot mechanism according to an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the assembly of a pilot mechanism and an exhaust valve according to an embodiment of this application.

[0035] Figure 6 for Figure 5Structure diagram of the pilot mechanism and the exhaust valve when the piston is compressing the inner cavity of the cylinder tube in the hydrogen tank.

[0036] Figure 7 For Figure 5 Structure diagram of the pilot mechanism and the exhaust valve when the piston is compressing the inner cavity of the cylinder tube in the hydrogen tank.

[0037] Explanation of reference signs:

[0038] 100 - force transmission bracket, 110 - first end of the force transmission bracket, 120 - second end of the force transmission bracket, 200 - pilot mechanism, 210 - cylinder tube, 220 - piston, 300 - exhaust valve, 310 - valve body, 311 - driving cavity, 312 - interface, 320 - valve core, 321 - valve hole, 330 - elastic member, 340 - observation rod, 400 - hinged member, 500 - gas storage mechanism, 510 - tank valve, 600 - one-way valve, 700 - pipeline, 710 - exhaust pipeline, 720 - gas supply pipeline, 800 - pressure reducing valve, 2000 - vehicle body, 3000 - fuel cell module. DETAILED DESCRIPTION

[0039] In order to make the person skilled in the art to which the present application belongs more clearly understand the present application, the technical scheme of the present application will be described in detail below in conjunction with the drawings and specific embodiments.

[0040] In the related art, after the vehicle collides, the tank valve of the hydrogen tank is closed, so that the high-pressure gas in the pipeline communicated with the hydrogen tank cannot be discharged, and there is a risk of explosion and flammability and a safety hazard in rescue.

[0041] The embodiments of the present application provide a pipeline pressure relief device, a gas storage system and a vehicle, which use vehicle collision energy as a driving force to timely discharge the high-pressure gas in the pipeline and eliminate the risk of explosion and flammability, thereby improving rescue safety.

[0042] In a first aspect, the embodiments of the present application provide a pipeline pressure relief device applied to a gas storage system, such as a hydrogen storage system or a natural gas storage system, which can quickly discharge the high-pressure gas in the pipeline communicated with the gas storage system.

[0043] Please refer to Figure 1 and Figure 5The pipeline pressure relief device provided by the embodiment of the application comprises a force transmission bracket 100, a pilot mechanism 200 and an exhaust valve 300, the force transmission bracket 100 is used for being connected to a collision-prone part of a vehicle body 2000, the pilot mechanism 200 comprises a cylinder barrel 210 and a piston 220 movably arranged in the cylinder barrel 210, the piston 220 is connected to the force transmission bracket 100, and the exhaust valve 300 is used for being connected to a pipeline 700 of a gas storage system, the exhaust valve 300 comprises a valve body 310 provided with a driving cavity 311 and a valve core 320 movably arranged in the driving cavity 311, and the driving cavity 311 is connected to an inner cavity of the cylinder barrel 210; wherein the piston 220 is driven by the force transmission bracket 100 to move in the inner cavity of the cylinder barrel 210, so as to compress the inner cavity of the cylinder barrel 210, thereby driving the valve core 320 to move in the driving cavity 311, so as to guide the pipeline 700 to be communicated to release pressure.

[0044] Please combine Figure 2 When the vehicle collides, collision energy is transmitted to the force transmission bracket 100, so that the force transmission bracket 100 is deformed, the piston 220 of the pilot mechanism 200 is connected to the force transmission bracket 100, so that the force transmission bracket 100 is deformed to drive the piston 220 to move in the cylinder barrel 210, so as to compress the inner cavity of the cylinder barrel 210, and the driving cavity 311 of the exhaust valve 300 is connected to the inner cavity of the cylinder barrel 210, so that the valve core 320 in the driving cavity 311 moves in the driving cavity 311, so as to guide the pipeline 700 to be communicated, so that the high-pressure gas in the pipeline 700 is discharged from the exhaust valve 300, the pressure in the pipeline 700 is reduced, the safety performance in the rescue process is improved, and the risk of flammability and explosiveness is reduced.

[0045] The collision-prone part of the vehicle body 2000 can be the rear part of the vehicle body of a passenger car, can be the front part of the vehicle body of a commercial vehicle, etc.

[0046] In some embodiments, please combine Figure 3 The first end 110 of the force transmission bracket 100 is fixedly installed, the second end 120 is connected to the piston 220, the thickness of the force transmission bracket 100 has a decreasing trend from the first end 110 to the second end 120, so that the elastic stress of the force transmission bracket 100 gradually decreases in the direction from the first end 110 to the second end 120, so that when the vehicle collides, the force transmission bracket 100 transmits energy to the first end 110, thereby driving the piston 220 to move in the inner cavity of the cylinder barrel 210, so as to ensure that the exhaust valve 300 is smoothly opened when colliding.

[0047] In some embodiments, please combine Figure 3, the outer shape of the gas storage mechanism 500 is generally cylindrical, and therefore the force transmission bracket 100 can be an arc-shaped shell or a mesh structure. The arc-shaped force transmission bracket 100 is wrapped around at least half of the circumference of the side of the gas storage mechanism 500 close to the outer surface of the vehicle, so as to ensure that the force transmission bracket 100 will also deform when the gas storage mechanism 500 is deformed in a collision. If the wrapping range of the force transmission bracket 100 is too small, the collision energy may not be transmitted to the force transmission bracket 100 when the gas storage mechanism 500 is displaced in a collision to a certain extent, and the piston 220 does not move, resulting in failure of the exhaust valve 300 to open. In other embodiments, the outer shape of the gas storage mechanism 500 can be other shapes, such as a planar structure, and the shape of the force transmission bracket 100 can also match the outer shape of the gas storage mechanism 500. The application does not specifically limit the shape of the force transmission bracket 100. The force transmission bracket 100 is arranged in a spaced manner with the gas storage mechanism 500, so as to facilitate accurate identification of the collision of the gas storage mechanism 500 and the movement of the gas storage mechanism 500. Avoiding the movement of the force transmission bracket 100 when a small collision does not cause the position of the gas storage mechanism 500 to move, thereby avoiding false triggering of the exhaust valve 300 to vent and exhaust.

[0048] In some embodiments, please continue to combine Figure 3 The first end 110 of the force transmission bracket 100 is located below the piston 220, and the first end 110 of the force transmission bracket 100 is a fixed end. The first end 110 is more easily connected when it is located below the piston 220. The cylinder 210 and the gas storage mechanism 500 are arranged at an angle in the axial direction, for example, the included angle between the cylinder 210 and the gas storage mechanism 500 is not less than 45°, which can adapt to collisions from more directions and ensure that the piston 220 can move in the inner cavity of the cylinder 210. The intersection of the axial direction of the cylinder 210 and the axial direction of the gas storage mechanism 500 forms two complementary angles, and the acute angle in the two complementary angles is the included angle between the axial direction of the cylinder 210 and the axial direction of the gas storage mechanism 500.

[0049] In some embodiments, please continue to combine Figure 3 The cylinder 210 is connected with a hinging piece 400 for hinging with the vehicle, so as to adapt to collisions in different directions and ensure that the piston 220 moves in the inner cavity of the cylinder 210 under the drive of the force transmission bracket 100. The hinging piece 400 is preferably a spherical hinge, which further ensures that the pilot mechanism 200 can adapt to collisions in different directions. The pilot mechanism 200 is provided in plurality, and the plurality of pilot mechanisms 200 are sequentially and spacedly distributed along the axial direction of the gas storage mechanism 500, which further ensures that collisions in different directions can all open the exhaust valve 300. The pilot mechanism 200 can be provided in two, three, or four, etc., which is not limited in the application.

[0050] In some embodiments, please combine Figure 4In some embodiments, the pilot mechanism 200 is provided with two cylinder barrels 210, the two cylinder barrels 210 are arranged oppositely, one end of the two cylinder barrels 210 are close to each other, and the other end of the two cylinder barrels 210 are away from each other, so as to adapt to collisions of different angles. In some embodiments, the pilot mechanism 200 is provided with three cylinder barrels 210, the outermost two cylinder barrels 210 are arranged oppositely, one end of the outermost two cylinder barrels 210 are close to each other, and the other end of the outermost two cylinder barrels 210 are away from each other, and the middle cylinder barrel 210 is perpendicular to the axis of the gas storage mechanism 500. Among them, the outermost two pilot mechanisms 200 can drive the piston 220 to move in the cylinder barrel 210 when a left rear collision or a right rear collision occurs, and the middle pilot mechanism 200 can drive the piston 220 to move in the cylinder barrel 210 when a rear collision occurs, so that the multi-angle pilot mechanism 200 adapts to multi-angle collisions. The pilot mechanism 200 is similar to the structure of the cylinder or the hydraulic cylinder in the related art, one end of the piston 220 is located in the inner cavity of the cylinder barrel 210, and the other end of the cylinder barrel 210 extends out of the cylinder barrel 210 and is connected to the first end 110 of the force transmission support 100. When the outermost two cylinder barrels 210 are arranged oppositely and the gas storage mechanism 500 is a hydrogen bottle, the extension line of the cylinder barrel 210 intersects the curved surface at both ends of the hydrogen bottle.

[0051] In some embodiments, the piston 220 can be a hydraulic piston 220 or a pneumatic piston 220, and the pressure medium in the cylinder barrel 210 can be fire-retardant hydraulic oil or non-combustible gas, etc., which is not limited in the present application.

[0052] In some embodiments, please combine Figure 5 The valve body 310 is provided with an interface 312 for connecting the pipeline 700 of the gas storage system, and the valve core 320 is provided with a valve hole 321. In the case that the piston 220 compresses the inner cavity of the cylinder barrel 210, the valve core 320 moves to a position where the valve hole 321 is in communication with the interface 312. Specifically, the interface 312 is provided with two, the two interfaces 312 are arranged oppositely along the axial direction of the valve hole 321, the driving cavity 311 can be cylindrical or cubic, etc., in the case that the piston 220 compresses the inner cavity of the cylinder barrel 210, the valve core 320 can move along the first direction to the position where the valve hole 321 is in communication with the interface 312. The first direction is arranged at an angle with the axial direction of the valve hole 321, and the angle can be an acute angle, and the first direction can also be perpendicular to the axial direction of the valve hole 321.

[0053] In some embodiments, please combine Figure 5 and Figure 6 The exhaust valve 300 further includes an elastic member 330, which acts on the valve core 320 and the cavity wall of the driving cavity 311, so as to drive the valve core 320 to reset in the case that the piston 220 does not compress the inner cavity of the cylinder barrel 210. The axial direction of the elastic member 330 extends along the first direction. The valve core 320 has a first end and a second end along the first direction, the first end is arranged close to the piston 220, and the elastic member 330 acts on the second end and the cavity wall of the driving cavity 311. The elastic member 330 can be a spring or a spring sheet.

[0054] In some embodiments, the pressure of the elastic member 330 is greater than the calibrated maximum stress; the calibrated maximum stress refers to that the vehicle is subjected to various road tests, and the maximum stress of the force transmission bracket 100 is measured during driving due to vehicle vibration, acceleration and deceleration, etc., so that the force transmission bracket 100 transmits to the piston 220. In the case where the pressure transmitted by the pilot mechanism 200 is greater than the pressure of the exhaust valve 300 spring, the exhaust valve 300 is opened.

[0055] In some embodiments, please refer to Figure 6 and Figure 7 , the valve core 320 is provided with an observation rod 340, and the valve body 310 is provided with an observation hole for the observation rod 340 to extend out of the valve body 310. In the case where the piston 220 compresses the inner cavity of the cylinder barrel 210, the observation rod 340 extends out of the valve body 310 through the observation hole, which facilitates identification of whether the exhaust valve 300 is opened, so as to judge the rescue safety. The observation rod 340 is connected to the second end of the valve core 320, and the observation rod 340 extends in the first direction. When the elastic member 330 is a spring, the spring is sleeved on the observation rod 340.

[0056] Based on the same technical concept as the first aspect, the second aspect, the embodiments of the present application also provide a gas storage system.

[0057] Please refer to Figure 1 and Figure 2 , the gas storage system provided by the embodiments of the present application comprises a gas storage mechanism 500, a pipeline 700 and the pipeline pressure relief device of the first aspect. The gas storage mechanism 500 and the pipeline 700 are connected in communication, the exhaust valve 300 of the pipeline pressure relief device is connected to the pipeline 700, and the force transmission bracket 100 of the pipeline pressure relief device is connected to the easily-collided part of the vehicle body 2000.

[0058] Please refer to Figure 2 , when a collision occurs, the force transmission bracket 100 deforms and displaces, drives the piston 220 to move in the inner cavity of the cylinder barrel 210, so that the valve core 320 located in the driving cavity 311 moves and conducts the pipeline 700. In some embodiments, the force transmission bracket 100 can be spaced apart from the gas storage mechanism 500 close to the outer surface of the vehicle body 2000; the piston 220 is located above the gas storage mechanism 500.

[0059] The axial direction of the gas storage mechanism 500 can extend along the width direction of the vehicle body 2000, or can extend along the length direction of the vehicle body 2000. The first end 110 of the force transmission bracket 100 is located below, and the second end 120 of the force transmission bracket 100 is located above. When the gas medium is hydrogen, the gas storage mechanism 500 is a hydrogen cylinder, and the hydrogen cylinder is connected with a cylinder valve 510.

[0060] Based on the same technical concept as the second aspect, in a third aspect, the embodiments of the present application also provide a vehicle.

[0061] Please combine Figure 1 and Figure 2 The vehicle of the embodiments of the present application comprises a vehicle body 2000 and the gas storage system of the second aspect.

[0062] In some embodiments, the force transmission bracket 100 and the cylinder barrel 210 are connected to the vehicle body 2000. The first end of the force transmission bracket 100 is connected to the vehicle body 2000, and the articulated member 400 connected to the cylinder barrel 210 is connected to the vehicle body 2000.

[0063] In some embodiments, the pipeline 700 comprises a gas supply pipeline 720 and an exhaust pipeline 710, and the vehicle further comprises a fuel cell module 3000, the fuel cell module 3000 is in communication with the gas storage mechanism 500 through the gas supply pipeline 720, the exhaust pipeline 710 is in communication with the gas supply pipeline 720, the exhaust port of the exhaust pipeline 710 is in communication with the outside, and the exhaust valve 300 is in communication with the exhaust pipeline 710. In some embodiments, the position of the exhaust port of the exhaust pipeline 710 can be selected according to the actual situation of the vehicle, but attention should be paid to avoiding the selection of the driving direction of the vehicle and the surface of the reverse driving direction, and avoiding the direction towards the chassis or the cabin.

[0064] In some embodiments, a one-way valve 600 is arranged on the exhaust pipeline 710, the input end of the one-way valve 600 is close to the output end of the exhaust valve 300, so as to avoid the backflow of air in the pipeline 700 after the high-pressure gas in the pipeline 700 is exhausted, and to avoid the mixing of the residual gas such as hydrogen in the pipeline 700 to cause explosion hazards.

[0065] In some embodiments, the gas in the gas storage mechanism 500 is high-pressure gas, in order to adapt to the pressure requirement of the fuel cell module 3000, in some embodiments, a pressure reducing valve 800 is arranged on the gas supply pipeline 720, and the output end of the pressure reducing valve 800 is in communication with the exhaust pipeline 710.

[0066] The pipeline pressure relief device, the gas storage system and the vehicle provided by the embodiments of the present application have at least the following advantages:

[0067] (1) By mechanical structure movement and force transmission, the displacement deformation of the gas storage mechanism 500 and the pipeline 700 is identified and emergency treatment is performed, and the high-pressure flammable gas in the pipeline 700 is actively released to the outside of the vehicle body 2000, so as to eliminate the safety risk and provide an effective solution for the flammable and explosive hidden danger and potential risk of high pressure caused by the collision of the high-pressure pipeline 700.

[0068] (2) The observation rod 340 of the exhaust valve 300 provides a pressure relief mark, which is convenient for the human eye to directly identify the risk state and provides important information for collision accident rescue.

[0069] (3) The pure mechanical device is completely used, no circuit control is used, and reliability is high in an emergency;

[0070] (4) The structure is simple, the occupied space is small, the actual situation of the vehicle can be reasonably arranged, practicality is high, and cost is low.

[0071] Although preferred embodiments of the application have been described, those of ordinary skill in the art can make additional changes and modifications to these embodiments once the general inventive concepts have been made known. Therefore, the appended claims are intended to cover all such changes and modifications that fall within the scope of the application.

[0072] Obviously, various modifications and changes can be made to the present application by those of ordinary skill in the art without departing from the spirit and scope of the application. Thus, it is intended that the application cover the modifications and changes as long as they come within the scope of the claims and their equivalents.

Claims

1. A pipeline pressure relief device applied to a gas storage system, characterized in that, The application relates to a pipeline pressure relief device. The pipeline pressure relief device comprises a force transmission bracket, a pilot mechanism and an exhaust valve. The force transmission bracket is connected to a collision-prone part of a vehicle body. The pilot mechanism comprises a cylinder and a piston movably arranged in the cylinder. The piston is connected to the force transmission bracket.

2. The line pressure relief device of claim 1, wherein The exhaust valve is connected to a pipeline of a gas storage system.

3. The line pressure relief device of claim 2, wherein The piston is driven by the force transmission bracket to move in the cylinder, compressing the cylinder and driving the valve core to move in the driving cavity, thus leading the pipeline to be connected and releasing pressure.

4. The line pressure relief device of claim 2, wherein The first end of the force transmission bracket is fixedly installed, and the second end is connected to the piston.

5. The line pressure relief device according to any one of claims 1 to 4, characterized in that, The thickness of the force transmission bracket decreases from the first end to the second end.

6. The line pressure relief device according to any one of claims 1 to 4, characterized in that The force transmission bracket is an arc-shaped shell or a net structure.

7. The line pressure relief device according to any one of claims 1 to 4, characterized by The first end of the force transmission bracket is located below the piston.

8. The line pressure relief device according to any one of claims 1 to 4, characterized by The cylinder is arranged at an angle with the axis of the gas storage mechanism.

9. A gas storage system characterized by, The cylinder is connected to a hinge for being hinged to the vehicle body. The pilot mechanism is provided with a plurality of pilot mechanisms. The valve body is provided with an interface for connecting the pipeline of the gas storage system.

10. A vehicle characterized by comprising: The valve core is provided with a valve hole. When the piston compresses the cylinder, the valve core moves to a position where the valve hole is connected to the interface. The exhaust valve further comprises an elastic member. The elastic member acts on the valve core and the cavity wall of the driving cavity to drive the valve core to reset when the piston does not compress the cylinder. The valve core is provided with an observation rod. The valve body is provided with an observation hole for the observation rod to extend out of the valve body. The application relates to a pipeline pressure relief device. The pipeline pressure relief device comprises a force transmission bracket, a pilot mechanism and an exhaust valve. The pipeline pressure relief device is connected to the pipeline. The application relates to a vehicle body. The force transmission bracket and the cylinder are connected to the vehicle body.

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