Waterproof and dustproof gas high-pressure safety valve

Abstract

This utility model discloses a waterproof and dustproof high-pressure safety valve for gas, including a housing, a guide seat, a valve, a filter assembly, and a valve seat. The housing has an inlet at its lower end and an outlet along its circumference. This structure adopts a bottom-in, side-out approach, with multiple outlets to improve exhaust efficiency. The guide seat and valve are located inside the housing, with the guide seat slidably connected to the inner wall of the housing. The valve seat is located at the lower end of the housing, with the upper end of the valve corresponding to the lower end of the guide seat. The valve and valve seat slide in contact, and the lower end of the valve corresponds to the flow channel of the valve seat. An exhaust chamber is located inside the housing, connected to the outlet along the circumference of the housing. An elastic sealing ring is provided on the inner wall of the exhaust chamber. Through optimized structural design and sealing performance, this valve solves the problems of leakage and jamming that may occur with traditional safety valves in special environments, improving safety and service life, and providing a guarantee for the long-term stable operation of industrial equipment.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, specifically a waterproof and dustproof high-pressure gas safety valve. Background Technology

[0002] In equipment systems, safety valves, as a critical safety protection device, are widely used in various pneumatic systems. Their main function is to limit the maximum pressure in the system and prevent excessive pressure from damaging the equipment. However, most existing safety valves are exposed at the inlet and outlet, making them highly susceptible to external environmental factors (such as dust and moisture) and impurities within the system, which can lead to seal failure, resulting in gas leakage or equipment malfunction.

[0003] Especially under high pressure and harsh environmental conditions, existing safety valve structures suffer from problems such as unstable sealing performance, valve jamming, and inability to effectively cope with dust and moisture. Patent publication number CN106499851A discloses an all-metal sealed pilot-operated safety valve, which adopts a safety valve design with a metal sealing surface and pilot-operated control structure. This design can provide reliable sealing performance in high-pressure and high-temperature environments and is suitable for the release of high-pressure gases. However, safety valves of this type are usually weak in resistance to external environmental factors such as water and dust, and cannot effectively prevent the entry of external impurities, which may lead to sealing failure and affect the safety of the system. Therefore, there is an urgent need for a new type of safety valve structure that can effectively prevent water and dust, and maintain long-term reliable sealing performance under high pressure. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a waterproof and dustproof high-pressure gas safety valve. Through optimized structural design and sealing performance, it solves the problems of leakage and jamming that may exist in traditional safety valves in special environments, improves safety, stability and service life, and provides a guarantee for the long-term stable operation of industrial equipment. It can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof and dustproof high-pressure safety valve for gas, comprising a housing, a guide seat, a valve, a filter assembly, and a valve seat. The lower end of the housing has an inlet, and the circumferential direction of the housing has an outlet. The guide seat and the valve are disposed inside the housing, with the guide seat slidably connected to the inner wall of the housing. The valve seat is disposed at the lower end of the housing, with the upper end of the valve corresponding to the lower end of the guide seat. The valve and the valve seat are in slidable contact, and the lower end of the valve corresponds to the flow channel of the valve seat. An outlet chamber is disposed inside the housing, connected to the circumferential outlet of the housing. An elastic sealing ring is disposed on the inner wall of the outlet chamber, with a lip below the elastic sealing ring corresponding to the circumferential outlet of the housing. A filter assembly is disposed at the lower end of the valve seat, comprising a filter screen, a hollow nut, and a limiting ring. The limiting ring and the filter screen are sequentially installed in the valve seat and fixed by the hollow nut.

[0006] Furthermore, an internal sealing ring is provided between the valve seat and the inner wall of the housing, and the valve seat and the housing are connected and fixed by threads.

[0007] Furthermore, the upper end of the valve is configured as an arc-shaped structure, and the lower end of the valve is configured as a conical structure. The conical surface of the lower end of the valve forms a contact seal with the flow channel of the valve seat. The lower end face of the guide seat is provided with an arc-shaped groove, which contacts the upper end of the valve.

[0008] Furthermore, a spring seat is threadedly connected to the upper end of the housing, a spring is provided between the spring seat and the guide seat, and an adjusting shim is provided between the spring seat and the upper end of the spring.

[0009] Furthermore, an external sealing ring and a protective ring are provided in the lower circumferential direction of the shell.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This safety valve features a specially designed elastic sealing ring and lip structure on the inner wall of the outlet chamber, forming a waterproof and dustproof annular seal. When the safety valve is closed, the lip aligns with the outlet in the circumferential direction of the housing, preventing external moisture and dust from entering the valve body. This design is particularly suitable for use in harsh environments such as high humidity and high dust. Because external impurities cannot enter, the valve remains in a clean working state, avoiding the accumulation and jamming of impurities. This effectively improves the service life and stability of the safety valve and reduces the incidence of equipment failure.

[0012] 2. The filter assembly, including a filter screen and a limiting ring, located at the lower end of the valve seat, effectively filters out larger particles of impurities in the system. The filter screen prevents impurities from entering the housing, thus avoiding jamming caused by impurities contacting the valve. The smooth movement of the valve reduces air leakage caused by jamming, ensuring the valve's sealing and unobstructed gas flow. The design of the limiting ring maintains a reasonable gap between the filter screen and the housing, ensuring smooth fluid flow and preventing the safety valve from being affected by excessive clogging or accumulation of impurities in the filter screen, further guaranteeing the safety and reliability of the high-pressure gas system.

[0013] 3. This utility model adopts a bottom-inlet, side-outlet structural design. The inlet is set at the lower end of the shell, and the design of multiple outlets in the circumferential direction allows the gas to be discharged more evenly and efficiently. Compared with the traditional single outlet method, this multi-outlet structure can effectively reduce airflow resistance and avoid the problems of gas stagnation or poor flow, thereby improving exhaust efficiency. This design allows the gas to pass through the safety valve quickly, ensuring that the system does not experience excessive pressure fluctuations during the release of high-pressure gas, effectively improving the stability of airflow and the working efficiency of the safety valve. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the safety valve opening structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the elastic sealing ring structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the valve and guide seat of this utility model.

[0018] In the diagram: 1. Filter assembly, 2. Internal sealing ring, 3. Valves seat, 4. Valves, 5. External sealing ring, 6. Protective ring, 7. Elastic sealing ring, 8. Guide seat, 9. Spring, 10. Housing, 11. Adjusting shim, 12. Spring seat, 13. Filter screen, 14. Hollow nut, 15. Limiting ring, 16. Air outlet chamber, 17. Lip, 18. Arc groove. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a waterproof and dustproof high-pressure safety valve for gas, including a housing 10, a guide seat 8, a valve 4, a filter assembly 1, and a valve seat 3. The lower end of the housing 10 has an inlet, and the circumferential direction of the housing 10 has an outlet. This structure adopts a bottom-in, side-out approach, with multiple outlets to improve exhaust efficiency. The guide seat 8 and the valve 4 are located inside the housing 10, with the guide seat 8 slidably connected to the inner wall of the housing 10. The valve seat 3 is located at the lower end of the housing 10, with the upper end of the valve 4 corresponding to the lower end of the guide seat 8. The valve 4 and the valve seat 3 are in slidable contact, and the lower end of the valve 4 corresponds to the flow channel of the valve seat 3. An exhaust chamber 16 is provided inside the housing 10, connected to the circumferential outlet of the housing 10. An elastic sealing ring 7 is provided on the inner wall of the exhaust chamber 16. The valve seat 3 has a lip 17 at its lower end, which corresponds to the outlet in the circumferential direction of the housing 10. When the safety valve is closed, the lip 17 forms an annular sealing structure in the outlet chamber 16, and the outlet is also sealed at this time. This can prevent external impurities or dust from entering the housing 10 and effectively prevent the valve from jamming and causing air leakage. The lower end of the valve seat 3 is provided with a filter assembly 1, which includes a filter screen 13, a hollow nut 14, and a limiting ring 15. The limiting ring 15 and the filter screen 13 are installed in the valve seat 3 in sequence and fixed by the hollow nut 14. The filter screen 13 can filter out larger impurities in the system and prevent them from entering the housing 10. It also prevents the valve from jamming and causing air leakage. The limiting ring 15 keeps a certain gap above the filter screen 13, which is conducive to the flow of the medium and ensures the stable operation of the safety valve.

[0021] An internal sealing ring 2 is provided between the valve seat 3 and the inner wall of the housing 10. The internal sealing ring 2 plays a sealing role to prevent air leakage. The valve seat 3 and the housing 10 are connected and fixed by threads.

[0022] The upper end of the valve 4 is set with an arc-shaped structure, and the lower end of the valve 4 is set with a conical structure. The conical surface of the lower end of the valve 4 forms a contact seal with the flow channel of the valve seat 3. When the safety valve is closed, the conical surface makes hard contact with the flow channel to form a seal. The lower end face of the guide seat 8 is provided with an arc-shaped groove 18, which contacts the upper end of the valve 4. This structure can reduce the contact area and improve the sensitivity of the valve 4.

[0023] A spring seat 12 is threadedly connected to the upper end of the housing 10. A spring 9 is provided between the spring seat 12 and the guide seat 8. An adjusting shim 11 is provided between the upper ends of the spring seat 12 and the spring 9. The spring 9 provides elastic support. Under the action of the spring 9, the safety valve is in the closed state. Only when the system pressure is higher than the specified value, the high-pressure gas overcomes the elastic force of the spring 9 and pushes the valve 4 upward to open the air passage. When the air passage is opened, the ends of the spring seat 12 and the guide seat 8 abut against each other, which plays a limiting role and ensures the structural safety of the safety valve.

[0024] The lower circumferential part of the housing 10 is provided with an external sealing ring 5 and a protective ring 6. When connected to an external device, the external sealing ring 5 plays a sealing role.

[0025] In use: When the pressure of the gas system rises and exceeds the set value of the safety valve, the gas pressure pushes the valve 4 to open and slide relative to the guide seat 8, allowing the gas to be discharged smoothly through the outlet. At this time, the elastic sealing ring 7 and lip 17 inside the outlet chamber 16 ensure that the gas does not leak out and prevent external impurities from entering the system. The filter assembly 1 filters out impurities in the fluid, ensuring that the valve 4 is not affected during the opening and closing process, avoiding valve jamming or leakage. Finally, when the gas pressure returns to the safe range, the valve 4 returns to its original position, closes the outlet, and restores the sealing state.

[0026] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A waterproof, dustproof gas high-pressure safety valve, comprising a shell (10), a guide seat (8), a valve (4), a filter assembly (1) and a valve seat (3), characterized in that: An inlet is provided at the lower end of the housing (10), and an outlet is provided in the circumferential direction of the housing (10). A guide seat (8) and a valve (4) are provided inside the housing (10). The guide seat (8) is slidably connected to the inner wall of the housing (10). A valve seat (3) is provided at the lower end of the housing (10). The upper end of the valve (4) corresponds to the lower end of the guide seat (8). The valve (4) and the valve seat (3) are in slidable contact, and the lower end of the valve (4) corresponds to the flow channel of the valve seat (3). An air outlet chamber (16) is provided inside the housing (10). 16) Connected to the outlet in the circumferential direction of the housing (10), the inner wall of the air outlet (16) is provided with an elastic sealing ring (7), and a lip (17) is provided below the elastic sealing ring (7). The lip (17) corresponds to the outlet in the circumferential direction of the housing (10). A filter assembly (1) is provided at the lower end of the valve seat (3). The filter assembly (1) includes a filter screen (13), a hollow nut (14) and a limiting ring (15). The limiting ring (15) and the filter screen (13) are installed in the valve seat (3) in sequence and fixed by the hollow nut (14).

2. The waterproof and dustproof high-pressure gas safety valve according to claim 1, characterized in that: An internal sealing ring (2) is provided between the valve seat (3) and the inner wall of the housing (10), and the valve seat (3) and the housing (10) are connected and fixed by threads.

3. The waterproof and dustproof high-pressure safety valve for gas according to claim 1, characterized in that: The upper end of the valve (4) is set as an arc-shaped structure, and the lower end of the valve (4) is set as a conical structure. The conical surface of the lower end of the valve (4) forms a contact seal with the flow channel of the valve seat (3). The lower end face of the guide seat (8) is provided with an arc-shaped groove (18), which contacts the upper end of the valve (4).

4. The waterproof and dustproof high-pressure gas safety valve according to claim 1, characterized in that: The upper end of the housing (10) is threaded with a spring seat (12), a spring (9) is provided between the spring seat (12) and the guide seat (8), and an adjusting shim (11) is provided between the upper end of the spring seat (12) and the spring (9).

5. A waterproof and dustproof high-pressure gas safety valve according to claim 1, characterized in that: The lower circumferential part of the housing (10) is provided with an external sealing ring (5) and a protective ring (6).

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