Temperature-triggered high-pressure cylinder pressure release device

Abstract

This utility model relates to a temperature-triggered pressure release device for high-pressure gas cylinders. Its features include a gas cylinder and a pressure release device, with a triggering device on the pressure release device. A steel pipe is arranged along the gas cylinder's generatrix on its outer periphery. An ethylene glycol aqueous solution is placed inside the steel pipe, one end of which is sealed, and the other end is connected to the triggering device. This high-pressure gas cylinder pressure release device, with its steel pipe arranged along the gas cylinder's direction, allows the steel pipe to be heated and triggered at any point along the cylinder's axial direction, releasing the pressure inside the cylinder. This not only ensures high triggering accuracy but also significantly reduces manufacturing costs.

Description

Technical Field

[0001] This utility model relates to a pressure release device for high-pressure gas cylinders triggered by temperature, belonging to the technical field of pressure gas cylinder accessories. Background Technology

[0002] During a fire, the pressure inside a high-pressure hydrogen storage cylinder rises rapidly with increasing temperature. If this pressure cannot be released in time, it can lead to an explosion and cause massive damage. To detect ignition sources at different locations on the cylinder, according to relevant international standards, for hydrogen storage cylinders longer than 2 meters, temperature-triggered pressure relief devices (TPRDs) need to be installed at the cylinder head, tail, and even the middle. The middle TPRD is connected to the cylinder valve, and the connecting pipeline contains high-pressure hydrogen, posing a risk of high-pressure hydrogen leakage due to pipeline rupture. Furthermore, if the ignition source is located between two TPRDs, there is a risk that the TPRDs may not be heated by the ignition and thus remain undetected, potentially leading to a cylinder explosion. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a high-pressure gas cylinder pressure release device triggered by temperature. The high-pressure gas cylinder pressure release device is provided with a steel pipe arranged along the direction of the gas cylinder. Heating any position in the axial direction of the gas cylinder can cause the steel pipe to be heated and triggered to release the pressure inside the gas cylinder. It not only has a high triggering accuracy, but also significantly reduces manufacturing costs.

[0004] To solve the above problems, the specific technical solution of this utility model is as follows: a high-pressure gas cylinder pressure release device triggered by temperature, including a gas cylinder and a pressure release device, wherein a triggering device is provided on the pressure release device; a steel pipe is provided on the outer periphery of the gas cylinder along the direction of the gas cylinder generatrix, an ethylene glycol aqueous solution is provided inside the steel pipe, one end of the steel pipe is sealed, and the other end is connected to the triggering device.

[0005] The pressure relief device includes a bottle neck valve body, a plug, a glass bulb, and a movable valve core. The plug is fixedly installed at the outer end of the bottle neck valve body. The movable valve core is located at the inner end of the bottle neck valve body. A glass bulb is installed between the plug and the movable valve core, and a triggering device is installed at the position of the glass bulb. The inner end of the bottle neck valve body is provided with a gas inlet and a gas outlet. A sealing ring is provided on the movable valve core. When the movable valve core is in the sealing working state, the sealing ring is sealed with the gas inlet of the bottle neck valve body. When the movable valve core moves to the pressure relief state, the gas inlet and the gas outlet are connected.

[0006] The triggering device includes a pipe joint, a rupture disc, a trigger plunger, and a spring; the rupture disc is disposed on the pressing end face of the steel pipe and the pipe joint; the top of the pipe joint is threadedly connected to the bottle neck valve body; the trigger plunger is coaxially disposed in the groove at the top of the pipe joint, and a spring is disposed on the trigger plunger, with one end of the spring supported on the boss surface of the trigger plunger and the other end supported on the bottle neck valve body; the top of the trigger plunger has a needle tip structure, and when the trigger plunger is triggered and extended, the needle tip structure extends into the bottle neck valve body and collides with the glass bulb.

[0007] The temperature-triggered high-pressure gas cylinder pressure release device of this application, employing the above-described structure, has the following advantages: 1. The steel pipe is arranged along the gas cylinder busbar. No matter where the fire occurs in the axial direction of the gas cylinder, it can vaporize the ethylene glycol aqueous solution and push the plunger to puncture the glass bulb. 2. The steel pipe contains an aqueous solution of ethylene glycol, so even if the pipe ruptures, it will not cause a leak of high-pressure hydrogen. 3. Reduce the amount of TPRD used, reduce the complexity of the bottle valve structure, and save manufacturing costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of this application.

[0009] Figure 2 for Figure 1 A magnified view of a portion of the image. Detailed Implementation

[0010] like Figure 1 and Figure 2 As shown, a high-pressure gas cylinder pressure release device triggered by temperature includes a gas cylinder 1 and a pressure release device 2. The pressure release device 2 is equipped with a triggering device 3. A steel pipe 4 is arranged along the generatrix of the gas cylinder 1 around the outer periphery of the gas cylinder 1. An ethylene glycol aqueous solution is placed inside the steel pipe 4. One end of the steel pipe 4 is sealed, and the other end is connected to the triggering device 3.

[0011] The pressure relief device 2 includes a bottle neck valve body 21, a plug 22, a glass bulb 23, and a movable valve core 24. The plug 22 is fixedly installed at the outer end of the bottle neck valve body 21. The movable valve core 24 is located at the inner end of the bottle neck valve body 21. The glass bulb 23 is arranged between the plug 22 and the movable valve core 24, and a triggering device 3 is provided at the position of the glass bulb 23. The inner end of the bottle neck valve body 21 is provided with a gas inlet and a gas outlet. The movable valve core 24 is provided with a sealing ring 25. When the movable valve core 24 is in the sealing working state, the sealing ring 25 is sealed with the gas inlet of the bottle neck valve body 21. When the movable valve core 24 moves to the depressurization state, the gas inlet and the gas outlet are connected.

[0012] The triggering device 3 includes a pipe joint 31, a rupture disc 32, a trigger plunger 33, and a spring 34. The rupture disc 32 is disposed on the pressing end face of the steel pipe 4 and the pipe joint 31. The top of the pipe joint 31 is threadedly connected to the bottle neck valve body 21. The trigger plunger 33 is coaxially disposed in the groove at the top of the pipe joint 31. The trigger plunger 33 is provided with a spring 34. One end of the spring 34 is supported on the boss surface of the trigger plunger 33, and the other end is supported on the bottle neck valve body 21. The top end of the trigger plunger 33 is a needle tip structure. When the trigger plunger 33 is triggered and extended, the needle tip structure extends into the bottle neck valve body 21 and collides with the glass bulb 23.

[0013] The working process of this application is as follows: When a fire occurs, the temperature of the steel pipe 4 containing ethylene glycol aqueous solution rises. When the temperature of the ethylene glycol aqueous solution is higher than 107 degrees Celsius, it rapidly vaporizes. The pressure inside the steel pipe 4 rises. When the pressure is higher than the set threshold of the rupture disc 32, the rupture disc 32 ruptures, and the ethylene glycol aqueous solution enters the inner hole of the pipe joint 31, pushing the trigger plunger 33 to move upward against the preload of the spring 34. The tip of the trigger plunger 33 punctures the glass bulb 23 in the pressure relief device 2, and the moving valve core 24 moves to the right, opening the passage of the gas inlet and gas outlet, and releasing the pressure inside the gas cylinder.

Claims

1. A temperature triggered high pressure cylinder pressure relief device, characterized by: It includes a gas cylinder (1) and a pressure relief device (2), and a trigger device (3) is provided on the pressure relief device (2); a steel pipe (4) is arranged along the generatrix of the gas cylinder (1) on the outer periphery of the gas cylinder (1), and an ethylene glycol aqueous solution is provided inside the steel pipe (4). One end of the steel pipe (4) is sealed, and the other end is connected to the trigger device (3).

2. The temperature triggered high pressure cylinder pressure relief device of claim 1, wherein: The pressure relief device (2) includes a bottle neck valve body (21), a plug (22), a glass bulb (23), and a movable valve core (24); the plug (22) is fixedly installed at the outer end of the bottle neck valve body (21); the movable valve core (24) is located at the inner end of the bottle neck valve body (21), and a glass bulb (23) is provided between the plug (22) and the movable valve core (24), and a triggering device (3) is provided at the position of the glass bulb (23); the inner end of the bottle neck valve body (21) is provided with a gas inlet and a gas outlet respectively, and a sealing ring (25) is provided on the movable valve core (24). When the movable valve core (24) is in the sealing working state, the sealing ring (25) is sealed and cooperates with the gas inlet of the bottle neck valve body (21); when the movable valve core (24) moves to the depressurization state, the gas inlet and the gas outlet are connected.

3. The temperature triggered high pressure cylinder pressure relief device of claim 2, wherein: The triggering device (3) includes a pipe joint (31), a rupture disc (32), a trigger plunger (33), and a spring (34); the rupture disc (32) is set on the pressing end face of the steel pipe (4) and the pipe joint (31); the top of the pipe joint (31) is threadedly connected to the bottle valve body (21); the trigger plunger (33) is coaxially set in the groove at the top of the pipe joint (31), and the spring (34) is provided on the trigger plunger (33). One end of the spring (34) is supported on the boss surface of the trigger plunger (33), and the other end is supported on the bottle valve body (21); the top of the trigger plunger (33) is a needle tip structure, and when the trigger plunger (33) is triggered and extended, the needle tip structure extends into the bottle valve body (21) and collides with the glass bulb (23).

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