Control valve with anti-explosion pressure relief structure

Abstract

The utility model relates to the technical field of anti-explosion pressure relief devices, in particular to a control valve with an anti-explosion pressure relief structure, which comprises a connecting pipe arranged on the surface of a first valve body, a first limit ring arranged on the outer surface of the connecting pipe, an external thread arranged on the surface of the connecting pipe, and a second limit ring arranged inside the connecting pipe, the second valve body is composed of a first sleeve and a second sleeve, internal threads are formed in the first sleeve, a cross-shaped guide piece, a spring and a piston are arranged in the second sleeve, a first sealing ring is fixed to the surface of a first limiting ring, a second sealing ring is fixed to the surface of a second limiting ring, and the cross-shaped guide piece is arranged at one end of the second sleeve; the control valve with the anti-explosion pressure relief structure has the advantages that the technical problem that an existing anti-explosion pressure relief valve is complex in structure and inconvenient to quickly relieve pressure is solved, meanwhile, the control valve is simple in structure and convenient to install, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof pressure relief devices, in particular to a control valve with an explosion-proof pressure relief structure. Background Art

[0002] The control valve is composed of two main assemblies: the valve body assembly and the actuator assembly (or actuator system), which are divided into four major series: single-seat series control valves, double-seat series control valves, sleeve series control valves and self-operated series control valves.

[0003] In the prior art, explosion-proof pressure relief valves are used to be installed on closed systems. When the pressure in the closed system exceeds the set pressure of the explosion-proof pressure relief valve, the sealing cover of the explosion-proof pressure relief valve automatically opens to allow the gas inside the system to leak out to ensure that the medium pressure in the system is below the set pressure to prevent accidents.

[0004] However, the traditional explosion-proof pressure relief valve has the disadvantage of being inconvenient for rapid pressure relief due to its complex structure, and is difficult to process on site, has a complex structure and installation process, and has a high maintenance cost. Therefore, the utility model proposes a control valve with an explosion-proof pressure relief structure to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a control valve with an explosion-proof pressure relief structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a control valve with an explosion-proof pressure relief structure, the control valve with an explosion-proof pressure relief structure comprising: a first valve body, a connecting pipe is arranged on the surface of the first valve body, a first limiting ring is arranged on the outer surface of the connecting pipe, an external thread is provided on the surface of the connecting pipe, and a second limiting ring is arranged inside the connecting pipe;

[0007] The second valve body is composed of a first sleeve and a second sleeve. The first sleeve is provided with an internal thread, and the second sleeve is provided with a cross guide, a spring and a piston.

[0008] Preferably, a first sealing ring is fixed on the surface of the first limiting ring, and a second sealing ring is fixed on the surface of the second limiting ring.

[0009] Preferably, the external thread and the internal thread are matched, the first sleeve is fixedly connected to the second sleeve, and the diameter of the first sleeve is larger than the diameter of the second sleeve.

[0010] Preferably, a cross guide is provided at one end of the second sleeve, and four guide air leakage holes are formed between the cross guide and the second sleeve.

[0011] Preferably, a through hole is provided at the other end of the second sleeve, a first pressure relief hole, a second pressure relief hole and a third pressure relief hole are provided on the surface of the second sleeve, and the first pressure relief hole, the second pressure relief hole and the third pressure relief hole are evenly distributed on the surface of the fifth sleeve.

[0012] Preferably, the diameter of the second pressure relief hole is larger than the diameter of the first pressure relief hole, and the diameter of the third pressure relief hole is larger than the diameter of the second pressure relief hole.

[0013] Preferably, an air release chamber is provided inside the second sleeve, and a spring and a piston are located in the air release chamber. One end of the spring is fixedly connected to the second sleeve, and the other end of the spring is fixedly connected to the piston. The piston and the second sleeve are slidably connected, and a third sealing ring is fixed on the surface of the second sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model proposes a control valve with an explosion-proof pressure relief structure, which solves the technical problem that the existing explosion-proof pressure relief valve is not convenient for rapid pressure relief due to its complex structure. At the same time, the device has a simple structure, is easy to install, and reduces maintenance costs. The second valve body can be installed on the first valve body by using external threads and internal threads. At the same time, when the installation is completed, the first sleeve will abut against the first sealing ring, and the second sleeve will abut against the second sealing ring, thereby improving the airtightness of the device. The four guide pressure relief holes formed by the cross guide and the second sleeve make it possible for the pressure to be transmitted to the piston through the four guide pressure relief holes during pressure relief, thereby improving stability. As the air in the pipeline expands, the internal pressure can be discharged at a low pressure to prevent the pressure from continuing to rise, which will cause the piston to move, and the internal pressure will leak from the first pressure relief hole, the second pressure relief hole, and the third pressure relief hole, thereby ensuring safety during use. This avoids the disadvantages of the traditional explosion-proof pressure relief valve that is not convenient for rapid pressure relief due to its complex structure, and the problems of high difficulty in on-site processing, complex structure and installation process, and high maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a detailed diagram of the connecting pipe structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the cross guide member of the utility model;

[0019] Figure 4 It is a cross-sectional view of the structure of the utility model.

[0020] In the figure: 1. first valve body; 2. connecting pipe; 3. first sealing ring; 4. first sleeve; 5. second sleeve; 6. through hole; 7. third pressure relief hole; 8. second pressure relief hole; 9. first pressure relief hole; 10. first limiting ring; 11. external thread; 12. second limiting ring; 13. second sealing ring; 14. internal thread; 15. cross guide; 16. guide air relief hole; 17. air relief chamber; 18. spring; 19. piston; 20. third sealing ring; 21. second valve body. DETAILED DESCRIPTION

[0021] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] See also Figure 1-Figure 4 The utility model provides a technical solution: a control valve with an explosion-proof pressure relief structure, the control valve with an explosion-proof pressure relief structure comprises: a first valve body 1, a connecting pipe 2 is arranged on the surface of the first valve body 1, a first limiting ring 10 is arranged on the outer surface of the connecting pipe 2, an external thread 11 is opened on the surface of the connecting pipe 2, and a second limiting ring 12 is arranged inside the connecting pipe 2;

[0024] The second valve body 21 is composed of a first sleeve 4 and a second sleeve 5. An internal thread 14 is provided inside the first sleeve 4. A cross guide 15, a spring 18 and a piston 19 are provided inside the second sleeve 5. The external thread 11 and the internal thread 14 are matched. The first sleeve 4 is fixedly connected to the second sleeve 5. The diameter of the first sleeve 4 is larger than the diameter of the second sleeve 5. A cross guide 15 is provided at one end of the second sleeve 5. Four guide vent holes 16 are formed between the cross guide 15 and the second sleeve 5.

[0025] When in use, the second valve body 21 can be installed on the first valve body 1 by using the external thread 11 and the internal thread 14. The four guide pressure relief holes formed by the cross guide 15 and the second sleeve 5 allow the pressure to be transmitted to the piston 19 through the four guide pressure relief holes during pressure relief, thereby improving stability. As the air in the pipeline expands, the internal pressure can be released at low pressure to prevent the pressure from continuing to rise. The pressure causes the piston 19 to move, and the internal pressure will leak from the first pressure relief hole 9, the second pressure relief hole 8 and the third pressure relief hole 7, thereby ensuring safety during use.

[0026] Embodiment 2

[0027] On the basis of the first embodiment, in order to improve the airtightness of the device, a first sealing ring 3 is fixed on the surface of the first limiting ring 10, a second sealing ring 13 is fixed on the surface of the second limiting ring 12, a third sealing ring 20 is fixed on the surface of the second sleeve 5, and a third sealing ring 20 is fixed on the surface of the second sleeve 5;

[0028] During use, when the installation is completed, the first sleeve 4 will abut against the first sealing ring 3, and the second sleeve 5 will abut against the second sealing ring 13. When the piston 19 moves, the third sealing ring 20 moves synchronously and at the same time clings to the inner wall of the air release chamber 17 to improve the airtightness of the device.

[0029] Embodiment 3

[0030] On the basis of the second embodiment, in order to improve the stability during pressure relief, a through hole 6 is provided at the other end of the second sleeve 5, and a first pressure relief hole 9, a second pressure relief hole 8 and a third pressure relief hole 7 are provided on the surface of the second sleeve 5. The first pressure relief hole 9, the second pressure relief hole 8 and the third pressure relief hole 7 are evenly distributed on the surface of the fifth sleeve;

[0031] An air release chamber 17 is provided inside the second sleeve 5, a spring 18 and a piston 19 are located in the air release chamber 17, one end of the spring 18 is fixedly connected to the second sleeve 5, and the other end of the spring 18 is fixedly connected to the piston 19;

[0032] During use, as the pressure in the tube changes, the moving distance of the piston 19 is also different. By setting the three pressure relief holes to different diameters, as the pressure increases, the intensity of the pressure relief also increases, thereby improving the stability during pressure relief. The set through hole 6 can facilitate the outflow of gas when the spring 18 moves, thereby improving the stability of the movement of the spring 18. When the pressure in the tube decreases, the piston 19 will automatically return to its position under the rebound action of the spring 18.

[0033] In actual use, the second valve body 21 can be installed on the first valve body 1 by using the external thread 11 and the internal thread 14. The four guide pressure relief holes formed by the cross guide 15 and the second sleeve 5 allow the pressure to be transmitted to the piston 19 through the four guide pressure relief holes during pressure relief, thereby improving stability. As the air in the pipeline expands, the internal pressure can be released at low pressure to prevent the pressure from continuing to rise. The pressure causes the piston 19 to move, and the internal pressure will leak from the first pressure relief hole 9, the second pressure relief hole 8 and the third pressure relief hole 7, thereby ensuring safety during use. When the pressure in the pipe decreases, the piston 19 will automatically return to its position under the rebound action of the spring 18. This avoids the disadvantages of traditional explosion-proof pressure relief valves that are inconvenient for rapid pressure relief due to their complex structure, high difficulty in on-site processing, complex structure and installation process, and high maintenance cost.

[0034] 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 control valve with an explosion-proof pressure relief structure, characterized in that: The control valve with an explosion-proof pressure relief structure comprises: a first valve body (1), a connecting pipe (2) is arranged on the surface of the first valve body (1), a first limiting ring (10) is arranged on the outer surface of the connecting pipe (2), an external thread (11) is provided on the surface of the connecting pipe (2), and a second limiting ring (12) is arranged inside the connecting pipe (2); The second valve body (21) is composed of a first sleeve (4) and a second sleeve (5). The first sleeve (4) is provided with an internal thread (14), and the second sleeve (5) is provided with a cross guide (15), a spring (18) and a piston (19).

2. A control valve with an explosion-proof pressure relief structure according to claim 1, characterized in that: A first sealing ring (3) is fixed on the surface of the first limiting ring (10), and a second sealing ring (13) is fixed on the surface of the second limiting ring (12).

3. The control valve with explosion-proof pressure relief structure according to claim 1, characterized in that: The external thread (11) and the internal thread (14) are matched, the first sleeve (4) is fixedly connected to the second sleeve (5), and the diameter of the first sleeve (4) is greater than the diameter of the second sleeve (5).

4. The control valve with explosion-proof pressure relief structure according to claim 1, characterized in that: A cross guide (15) is provided at one end of the second sleeve (5), and four guide air leakage holes (16) are formed between the cross guide (15) and the second sleeve (5).

5. A control valve with an explosion-proof pressure relief structure according to claim 4, characterized in that: A through hole (6) is provided at the other end of the second sleeve (5), a first pressure relief hole (9), a second pressure relief hole (8) and a third pressure relief hole (7) are provided on the surface of the second sleeve (5), and the first pressure relief hole (9), the second pressure relief hole (8) and the third pressure relief hole (7) are evenly distributed on the surface of the fifth sleeve.

6. A control valve with an explosion-proof pressure relief structure according to claim 5, characterized in that: The diameter of the second pressure relief hole (8) is greater than the diameter of the first pressure relief hole (9), and the diameter of the third pressure relief hole (7) is greater than the diameter of the second pressure relief hole (8).

7. The control valve with explosion-proof pressure relief structure according to claim 4, characterized in that: The second sleeve (5) is provided with an air release chamber (17) inside, a spring (18) and a piston (19) are located in the air release chamber (17), one end of the spring (18) is fixedly connected to the second sleeve (5), the other end of the spring (18) is fixedly connected to the piston (19), the piston (19) and the second sleeve (5) are slidably connected, and a third sealing ring (20) is fixed on the surface of the second sleeve (5).

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