Safety relief valve for high-pressure hydrogen buffer tank

Abstract

The utility model discloses a kind of safety relief valve of high-pressure hydrogen buffer tank, belong to pressure vessel safety accessory technical field, the valve includes connecting pipe, the relief mechanism and protective assembly in the connecting pipe;Its core is, the protective assembly is detachably installed in the outside of connecting pipe, and the protective assembly is integrated with the fence for blocking sundries and the ceiling for shielding rainwater, and quick assembly and disassembly with valve body are realized by connecting ring.The utility model passes through the independent protective assembly of this structure, effectively solved the technical problem that the action of existing safety valve is jammed or corroded due to the fact that precision relief mechanism is exposed to outside world for a long time, easily disturbed by sundries and rainwater, and then affect its work reliability.The design significantly improves the safety and environmental adaptability of device, prolongs service life, and the convenient detachable structure also greatly facilitates daily cleaning and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel safety accessories technology, and in particular to a safety pressure relief valve for a high-pressure hydrogen buffer tank. Background Technology

[0002] With the widespread application of hydrogen energy as a clean energy source, high-pressure hydrogen storage and transportation technologies are becoming increasingly important. High-pressure hydrogen buffer tanks are key equipment in hydrogen energy application scenarios such as hydrogen refueling stations, and their operational safety is paramount. To prevent dangerous accidents such as explosions due to abnormally high internal pressure, safety relief valves are typically installed on the tank. These safety relief valves are automatic valves whose core function is to automatically open when the internal pressure exceeds a preset safety value, releasing the overpressurized hydrogen, and then automatically close once the pressure returns to normal, thus ensuring the safety of the entire system.

[0003] Existing safety relief valves are typically designed with a focus on the precision and sensitivity of their internal pressure relief mechanisms, such as using sophisticated springs and valve core assemblies to achieve accurate pressure response. However, in actual installation and use, these safety relief valves are often directly exposed to industrial sites or outdoor environments. These environments are usually complex and inevitably contain dust, sand, rain, snow, and other industrial debris.

[0004] For a device that relies on precise mechanical movements to achieve its safety function, such exposure poses a serious safety hazard. For example, dust and debris in the air may infiltrate the gaps between moving parts such as the spring chamber or valve stem of the pressure relief valve. Over time, this accumulation may cause the moving parts to jam, preventing the valve from responding promptly when needed or from closing completely after opening. Furthermore, direct rainwater infiltration and corrosion will accelerate the corrosion process of critical metal components such as the spring. This will not only alter the original mechanical properties of the spring, causing the pressure relief setpoint to drift, but in severe cases, it may even cause the components to rust and seize, thus rendering the entire safety valve completely ineffective.

[0005] Currently, while temporary or partial shielding may be provided for equipment in certain situations, there is a general lack of a structured solution that integrates with the safety valve body itself and provides comprehensive protection. This neglect of external environmental protection significantly reduces the long-term reliability of existing safety relief valves, requiring frequent inspections and maintenance, and always posing a safety risk of malfunction due to environmental factors.

[0006] Therefore, this utility model proposes a safety pressure relief valve for a high-pressure hydrogen buffer tank to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above deficiencies, this utility model provides a safety pressure relief valve for a high-pressure hydrogen buffer tank. It aims to improve the problem in the prior art where the precision pressure relief mechanism of the safety pressure relief valve for a high-pressure hydrogen buffer tank is directly exposed to the external environment, making it susceptible to interference from debris and rainwater, which can lead to jamming or corrosion, thereby reducing the reliability and safety of use.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a safety pressure relief valve for a high-pressure hydrogen buffer tank, comprising a connecting pipe connected by a flange; and a protective component.

[0009] The protective assembly is equipped with a fence to block debris and a canopy to shield against rain.

[0010] The protective component is sleeved on the outside of the connecting pipe and is detachably connected by connecting ring two and connecting ring one respectively provided on the protective component and the connecting pipe. Connecting ring one is fixed to the outer wall of the connecting pipe through connecting port one.

[0011] Preferably, the detachable connection between the first connecting ring and the second connecting ring is achieved by a rotating shaft, a threaded rod, a washer, and a knob. After passing through the second connecting ring, the threaded rod engages with a notch on the first connecting ring and is locked by the knob.

[0012] Preferably, a reinforcing ring is fitted around the outside of the fence.

[0013] Preferably, the safety relief valve further includes a second connection port, a third connection port, and a housing, which are sequentially threaded together to form a cavity for accommodating the pressure relief mechanism, which includes a spring and a valve.

[0014] Preferably, the pressure relief mechanism further includes an adjusting nut and an adjusting bolt, wherein the adjusting nut is screwed onto the adjusting bolt for adjusting the preload of the spring.

[0015] Preferably, the pressure relief mechanism further includes a push pin and a force transmission plate, and the spring force is transmitted to the valve through the push pin and the force transmission plate.

[0016] Preferably, the connecting pipe is rotatably provided with a valve ball, which is connected to an external handle via a transmission mechanism.

[0017] Preferably, the safety relief valve further includes a connecting sleeve and a connector, the connector being fixed to the outer wall of the connecting pipe via the connecting sleeve, for limiting the rotation of the handle.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, by setting a detachable protective component integrating a fence and a canopy on the outside of the valve body of the safety relief valve, the technical problem of the precision pressure relief mechanism of the safety relief valve being exposed to the external environment for a long time, being easily jammed by debris or corroded by rainwater, thus affecting its operational reliability and service life, is solved. It achieves the technical effect of effectively isolating external environmental interference, preventing the mechanism from jamming and being damaged, and significantly improving the operational reliability and safety of the safety valve.

[0020] 2. In this utility model, by adopting a fastening structure in which a connecting ring, a threaded rod, and a knob cooperate, the technical problem of inconvenient disassembly and assembly, and difficulty in effective cleaning and maintenance after the existing protective device is connected and fixed to the valve body is solved. This enables the protective components to be installed and disassembled quickly and conveniently, facilitates the regular cleaning or replacement of the valve body and the protective components themselves, and ensures the long-term effectiveness of the protective function. Attached Figure Description

[0021] Figure 1 A perspective view of a safety pressure relief valve for a high-pressure hydrogen buffer tank proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the protective assembly of a safety relief valve for a high-pressure hydrogen buffer tank proposed in this utility model.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the connecting pipe of a safety pressure relief valve for a high-pressure hydrogen buffer tank proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of a safety valve for a high-pressure hydrogen buffer tank, as proposed in this utility model.

[0026] Legend:

[0027] 1. Flange connection; 2. Connecting sleeve; 3. Connecting pipe; 4. Protective components; 401. Connecting ring one; 402. Connecting ring two; 403. Reinforcing ring; 404. Fence; 405. Canopy; 5. Connection port one; 6. Rotating shaft; 7. Threaded rod; 8. Gasket; 9. Knob; 10. Connection port two; 11. Housing; 12. Handle; 13. Connector; 14. Valve ball; 15. Adjusting nut; 16. Adjusting bolt; 17. Spring; 18. Pin; 19. Force transmission plate; 20. Valve; 21. Connection port three. Detailed Implementation

[0028] 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.

[0029] Reference Figures 1-5 The present invention provides an embodiment of a safety pressure relief valve for a high-pressure hydrogen buffer tank, which aims to solve the problem that the core mechanism of the safety pressure relief valve in the prior art is easily affected by external environmental debris and rainwater, resulting in jamming or damage and affecting the reliability of operation.

[0030] The safety relief valve of the high-pressure hydrogen buffer tank includes a connecting pipe 3 connected to the hydrogen buffer tank via a flange 1, and a protective component 4 sleeved on the outside of the connecting pipe 3. The connecting pipe 3 serves as the main body of the entire device, providing a flow channel for hydrogen and serving as a mounting base for other components. The protective component 4 is used to provide environmental isolation and protection for the pressure relief mechanism and other moving parts installed on the connecting pipe 3.

[0031] The protective assembly 4 includes a second connecting ring 402 serving as its base, multiple rails 404 vertically fixed to the top of the second connecting ring 402, reinforcing rings 403 spaced around the outer periphery of these rails 404, and a canopy 405 fixed to the top of the rails 404. To achieve a detachable connection with the connecting pipe 3, the protective assembly 4 also includes a rotating shaft 6, a threaded rod 7, a washer 8, and a knob 9. Correspondingly, a first connecting ring 401 is fixed to the outer wall of the connecting pipe 3 via a first connecting port 5, and the first connecting ring 401 has a notch. During assembly, the second connecting ring 402 of the protective assembly 4 is aligned with the connecting... The connecting ring 401 on the pipe 3 is connected to the threaded rod 7 by the operation of the rotating shaft 6. The rotating shaft 6 drives the threaded rod 7 to rotate, so that after the threaded rod 7 passes through the connecting ring 402, its rod body engages with the notch of the connecting ring 401. Then, the washer 8 is placed on the outside of the threaded rod 7, and the knob 9 is threaded onto the outer wall of the threaded rod 7. Tightening the knob 9 will fasten the connecting ring 401 and the connecting ring 402 together, thereby firmly fixing the entire protective assembly 4 to the connecting pipe 3. This connection method, which uses the threaded rod to engage with the notch and is locked by the knob, ensures the stability of the protective assembly 4 during installation and the convenience of disassembly and assembly.

[0032] The valve body also includes a second connection port 10, a third connection port 21, and a housing 11. The second connection port 10 is connected to the internal flow channel of the connecting pipe 3. The third connection port 21 is threaded to the top of the second connection port 10, and the housing 11 is threaded to the top of the third connection port 21. In this closed cavity formed by the second connection port 10, the third connection port 21, and the housing 11, a complete pressure relief mechanism is housed. The pressure relief mechanism includes, from top to bottom, an adjusting nut 15, an adjusting bolt 16, a spring 17, a push pin 18, a force transmission plate 19, and a valve 20. The adjusting nut 15 is screwed onto the top external thread of the adjusting bolt 16. The lower end of the adjusting bolt 16 abuts against the upper end of the spring 17. The lower end of the spring 17 applies a preset elastic force to the valve 20 through the push pin 18 and the force transmission plate 19, thereby tightly pressing the valve 20 against the valve port at the top of the third connection port 21 to form a seal.

[0033] As a preferred solution for controlling the flow channel opening and closing of the safety relief valve, a valve ball 14 is rotatably provided in the internal flow channel of the connecting pipe 3. The valve ball 14 is connected to a handle 12 located outside the valve body through an internal transmission mechanism. In order to precisely limit the rotation of the handle 12, a connector 13 is fixed on the outer wall of the connecting pipe 3 through a connecting sleeve 2. The physical structure of the connector 13 is used to limit the rotation range of the handle 12, ensuring that the valve ball 14 can only rotate between the preset open and closed positions.

[0034] Working principle: Under normal operating conditions, turning handle 12 causes valve ball 14 to rotate to the open position inside connecting pipe 3 via connector 13, allowing hydrogen to flow freely to connection port 2 10. Simultaneously, by pre-rotating adjusting nut 15, the preload pressure applied by adjusting bolt 16 to spring 17 is set. This pressure is transmitted to valve 20 via pin 18 and force transmission plate 19, causing valve 20 to tightly seal the passage of connection port 3 21. When the hydrogen pressure inside connecting pipe 3 abnormally increases and exceeds the safety threshold set by spring 17, the hydrogen thrust acting on the bottom of valve 20 will exceed the pressure of spring 17, causing the hydrogen to push valve 20 against the spring. The spring 17 moves upward, opening the pressure relief channel. Excess hydrogen gas is then discharged to the outside through the connection port 21 until the pressure in the connection pipe 3 drops back to a safe range. At this time, the spring 17 takes over again, pushing the valve 20 to reset and reseal the channel. During the entire operation, the protective component 4 effectively blocks external debris from entering through its grille 404, preventing jamming of moving parts such as the spring 17 and the ejector pin 18. Its canopy 405 can prevent rainwater from directly entering and causing corrosion of the internal mechanism. Through this synergistic effect of physical isolation, this utility model solves the problem of decreased reliability of safety valves in the prior art due to exposure to harsh environments.

Claims

1. A safety relief valve for a high-pressure hydrogen buffer tank, comprising a connecting pipe (3) connected to the hydrogen buffer tank via a flange (1), characterized in that, The safety relief valve also includes a protective component (4), which is sleeved on the outside of the connecting pipe (3); The outer wall of the connecting pipe (3) is fixed with a connecting ring (401) through the connecting port (5). The protective component (4) is provided with a connecting ring (402), which is detachably connected to the connecting ring (401). The protective component (4) is provided with a fence (404) for blocking debris and a canopy (405) for shielding from rain.

2. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 1, characterized in that, The first connecting ring (401) has a notch. The protective component (4) also includes a rotating shaft (6), a threaded rod (7), a washer (8), and a knob (9). The threaded rod (7) is driven to rotate by the rotating shaft (6). After passing through the second connecting ring (402), it engages with the notch of the first connecting ring (401). The washer (8) is sleeved on the threaded rod (7), and the second connecting ring (402) is fastened to the first connecting ring (401) by tightening the knob (9).

3. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 1, characterized in that, The fence (404) is fitted with a reinforcing ring (403) on its outside.

4. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 1, characterized in that, It also includes a second connection port (10), a third connection port (21), and a housing (11); the second connection port (10) is connected to the connecting pipe (3), the third connection port (21) is threaded to the top of the second connection port (10), and the housing (11) is threaded to the top of the third connection port (21); the safety pressure relief valve also includes a pressure relief mechanism disposed in the cavity formed by the connection port and the housing (11), the pressure relief mechanism including a spring (17) and a valve (20).

5. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 4, characterized in that, The pressure relief mechanism also includes an adjusting bolt (16) and an adjusting nut (15), the adjusting nut (15) being screwed onto the adjusting bolt (16), and the pressure of the adjusting bolt (16) on the spring (17) being changed by adjusting the position of the adjusting nut (15).

6. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 4, characterized in that, The pressure relief mechanism also includes a push pin (18) and a force transmission plate (19); the elastic force of the spring (17) is transmitted to the valve (20) in sequence through the push pin (18) and the force transmission plate (19) to press the valve (20) against the top of the connection port three (21).

7. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 1, characterized in that, The connecting pipe (3) is rotatably provided with a valve ball (14); the safety relief valve also includes a handle (12) that is throttle-connected to the valve ball (14), the handle (12) being used to drive the valve ball (14) to rotate to open or close the passage of the connecting pipe (3).

8. The safety pressure relief valve for the high-pressure hydrogen buffer tank according to claim 7, characterized in that, It also includes a connecting sleeve (2) and a connector (13); the connector (13) is fixed to the outer wall of the connecting tube (3) through the connecting sleeve (2) and is used to limit the rotation of the handle (12).

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