Air pressure regulating valve

Abstract

The utility model discloses an air pressure regulating valve, which relates to the field of valves and comprises a valve body, a first through hole and a second through hole are arranged at the bottom of the valve body, a piston is slidably arranged in the valve body, and the first through hole and the second through hole can be sealed by the bottom of the piston. A first spring is arranged in the valve body and used for supporting the piston to enable the piston to be close to the bottom of the valve body, and an adjusting assembly is arranged in the valve body and used for adjusting the force of the first spring for supporting the piston. The device has the beneficial effects that the pushing condition of the piston can be changed by adjusting the force of the first spring for supporting the piston through the adjusting assembly, and the force of the second spring for pushing the conical block is changed by rotating the second bolt to enable the second bolt to push the second top plate, adjusting the distance between the second top plate and the piston and changing the force of the second spring for pushing the conical block; therefore, the two-way exhaust triggering condition of the valve can be adjusted according to different environments and specific requirements, and the use range of the air pressure adjusting valve is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an air pressure regulating valve. Background Art

[0002] The air pressure in areas with different altitudes is different. The closed containers used in aerospace products are generally required to have air pressure regulating function. There are two types of air pressure regulating valves: one is a one-way air pressure regulating valve and the other is a two-way air pressure regulating valve.

[0003] The two-way pressure regulating valve can not only release pressure to the outside environment when the internal pressure of the container exceeds the standard, but also can realize air intake when the internal pressure of the container is lower than the external environment pressure. This two-way regulation function is particularly important when the closed container is transported by air.

[0004] The switch actuator of the air pressure regulating valve is mainly composed of a spring, and the existing air pressure regulating valve does not have a component for adjusting the initial state of the spring, so the opening state of this type of air pressure regulating valve is fixed, that is, the value of the internal and external air pressure difference is fixedly matched with the opening critical value of the air pressure regulating valve, and cannot be adjusted according to different environments to change the opening trigger conditions of the air pressure regulating valve. Utility Model Content

[0005] The purpose of the present utility model is to provide an air pressure regulating valve in order to solve the above problems, as described below.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides an air pressure regulating valve, comprising a valve body, wherein a through hole 1 and a through hole 2 are opened at the bottom of the valve body, a piston is slidably arranged in the valve body, and the bottom of the piston can seal the through hole 1 and the through hole 2;

[0008] A spring 1 is provided in the valve body for supporting the piston so that the piston is close to the bottom of the valve body. An adjusting component is provided in the valve body for adjusting the strength of the spring 1 supporting the piston.

[0009] A hole is provided in the piston, and the hole corresponds to the second through hole;

[0010] A one-way ventilation component is arranged in the hole, and the air flow direction of the one-way ventilation component is that the external air passes through the one-way ventilation component and the second through hole in sequence.

[0011] By using the above-mentioned air pressure regulating valve, the connecting pipe is connected to the sealed packaged container. With the change of environment, when the air pressure of the external environment is lower than the air pressure in the container, the air pressure in the container will push the piston, so that a gap will be generated between the piston and the bottom of the inner wall of the valve body. Then, through hole 1 and through hole 2 will be connected, and the excess gas in the container will enter the valve body and be discharged to the outside through through hole 1. When the air pressure inside the container is consistent with the air pressure of the external environment, the piston will seal through hole 1 and through hole 2 again under the push of spring 1.

[0012] When the external environment pressure is greater than the air pressure inside the container, the external air pressure will push the conical block, causing the one-way vent assembly to become leak-tight. At that time, the gas from the external environment will enter the container through the one-way vent assembly, causing the internal air pressure of the container to be balanced with the external pressure. After the balance is achieved, the one-way vent assembly will be sealed again.

[0013] Preferably, a fixing plate is fixed on the valve body, a guide rod is vertically slidably arranged on the fixing plate, and the lower end of the guide rod is fixed to the piston, and the spring 1 is arranged on the surface of the guide rod.

[0014] Preferably, the adjustment assembly includes a sliding rod and a bolt, the sliding rod is slidably arranged on a fixed plate, a top plate is slidably arranged on the surface of the guide rod, the sliding rod is fixed to the top plate, the bolt is vertically threadedly connected to the fixed plate, and an end of the bolt corresponds to a side of the top plate facing away from the spring.

[0015] Preferably, two ends of the spring are in contact with opposite surfaces of the piston and the top plate, respectively.

[0016] Preferably, sealing gaskets are provided on both sides of the piston.

[0017] Preferably, the second through hole is connected with a connecting pipe, and the valve body is provided with a mounting frame.

[0018] Preferably, the one-way ventilation assembly includes a sleeve and a fixed rod, the sleeve is fixed in the channel, a fixed sleeve is fixed in the sleeve, the fixed rod is vertically fixed on the piston, and a connecting plate and a top plate 2 are slidably provided on the surface of the fixed rod, a spring 2 is slidably provided on the surface of the fixed rod, and the two ends of the spring 2 are respectively fixed to the top plate 2 and the piston, a bolt 2 is vertically threadedly connected on the connecting plate, and the ends of the bolt 2 correspond to the top plate 2, a connecting rod is fixed on the connecting plate, and the connecting rod passes through the fixing sleeve and is fixed with a conical block for sealing the fixing sleeve.

[0019] Preferably, a sealing sleeve is provided on the surface of the conical block.

[0020] The beneficial effects are:

[0021] Through the cooperation of the piston, valve body, through hole 1, through hole 2 and one-way ventilation assembly, the device can realize two-way exhaust. When the air pressure of the external environment is lower than the air pressure in the container, a gap is generated between the piston and the bottom of the inner wall of the valve body, and the excess gas in the container will enter the valve body and be discharged to the outside through through hole 1. When the air pressure of the external environment is higher than the air pressure in the container, the one-way ventilation assembly loses airtightness, so that the air pressure inside the container is balanced with the outside. After the balance, the one-way ventilation assembly is sealed again. By adjusting the force of spring 1 to support the piston through the adjustment assembly, the condition for the piston to be pushed can be changed. By turning bolt 2, bolt 2 pushes top plate 2, the distance between top plate 2 and the piston is adjusted, and the force of spring 2 to push the conical block is changed. Therefore, the two-way exhaust triggering condition of the valve can be adjusted according to different environments and specific needs, thereby improving the application range of the air pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a front view structural schematic diagram of the utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 3 It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the valve body of the utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the piston of the utility model;

[0028] Figure 6 It is a three-dimensional cross-sectional structural schematic diagram of the one-way ventilation component of the utility model.

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Valve body; 2. Through hole 1; 3. Through hole 2; 4. Mounting frame; 5. Connecting pipe; 6. Piston; 7. Sealing gasket; 8. Spring 1; 9. Adjusting assembly; 10. Guide rod; 11. Fixing plate; 12. Top plate 1; 13. Sliding rod; 14. Bolt 1; 15. One-way ventilation assembly; 16. Channel; 17. Sleeve; 18. Fixing sleeve; 19. Conical block; 20. Sealing sleeve; 21. Elastic assembly; 22. Connecting rod; 23. Connecting plate; 24. Bolt 2; 25. Fixing rod; 26. Top plate 2; 27. Spring 2. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0032] See also Figure 1-Figure 6 As shown, the utility model provides an air pressure regulating valve, including a valve body 1, a through hole 1 2 and a through hole 2 3 are opened at the bottom of the valve body 1, a piston 6 is slidably arranged in the valve body 1, and the bottom of the piston 6 can seal the through hole 1 2 and the through hole 2 3;

[0033] A spring 8 is provided in the valve body 1 for supporting the piston 6 so that the piston 6 is close to the bottom of the valve body 1. An adjusting component 9 is provided in the valve body 1 for adjusting the strength of the spring 8 supporting the piston 6.

[0034] A hole 16 is formed in the piston 6, and the hole 16 corresponds to the second through hole 3;

[0035] A one-way ventilation component 15 is disposed in the hole 16 , and the air flow direction of the one-way ventilation component 15 is that the external air passes through the one-way ventilation component 15 and the through hole 2 3 in sequence.

[0036] As an optional embodiment, a fixing plate 11 is fixed on the valve body 1 , a guide rod 10 is vertically slidably arranged on the fixing plate 11 , and the lower end of the guide rod 10 is fixed to the piston 6 , and a spring 8 is arranged on the surface of the guide rod 10 .

[0037] The adjustment assembly 9 includes a slide bar 13 and a bolt 14. The slide bar 13 is slidably arranged on the fixed plate 11. A top plate 12 is slidably arranged on the surface of the guide rod 10. The slide bar 13 is fixed to the top plate 12. The bolt 14 is vertically threadedly connected to the fixed plate 11, and the end of the bolt 14 corresponds to the side of the top plate 12 facing away from the spring 8.

[0038] By adjusting the force of the spring 8 supporting the piston 6 through the adjusting component 9, the conditions for the piston 6 to be pushed can be changed. By increasing the force of the spring 8 pushing the piston 6, the pressure difference between the inside and outside of the container needs to be increased to push the piston 6. Therefore, the force of the spring 8 supporting the piston 6 can be adjusted according to specific needs;

[0039] By rotating the bolt 14, pushing the top plate 12, and adjusting the distance between the top plate 12 and the piston 6, the degree of compression of the spring 8 can be adjusted, thereby changing the force of the spring 8 supporting the piston 6.

[0040] The two ends of the spring 8 are in contact with the opposite surfaces of the piston 6 and the top plate 12 respectively.

[0041] Sealing pads 7 are provided on both sides of the piston 6 , and the sealing pads 7 can improve the sealing performance between the piston 6 and the valve body 1 .

[0042] The second through hole 3 is connected with a connecting pipe 5 for connecting with the container. A mounting frame 4 is provided on the valve body 1 to facilitate mounting the valve body 1 on the container.

[0043] The one-way ventilation assembly 15 includes a sleeve 17 and a fixed rod 25. The sleeve 17 is fixed in the channel 16. A fixed sleeve 18 is fixed in the sleeve 17. The fixed rod 25 is vertically fixed on the piston 6. A connecting plate 23 and a second top plate 26 are slidably provided on the surface of the fixing rod 25. A second spring 25 is slidably provided on the surface of the fixing rod 25. The two ends of the second spring 25 are respectively fixed to the second top plate 26 and the piston 6. A second bolt 24 is vertically threadedly connected to the connecting plate 23, and the end of the second bolt 24 corresponds to the second top plate 26. A connecting rod 22 is fixed on the connecting plate 23, and the connecting rod 22 passes through the fixing sleeve 18 and is fixed with a conical block 19 for blocking the fixing sleeve 18.

[0044] When the external air pressure is greater than the internal air pressure of the container, the conical block 19 will be pushed by the air pressure, so that a gap will be generated between the conical block 19 and the fixed sleeve 18. At that time, the external air will pass through the one-way ventilation assembly 15 through the gap. By rotating the bolt 24, the bolt 24 pushes the top plate 26, and the distance between the top plate 26 and the piston 6 is adjusted, thereby changing the initial compression degree of the spring 27, thereby adjusting the force of the spring 27 to support the conical block 19 upward. The compression degree of the spring 27 can be adjusted according to the corresponding adjustment of the ambient air pressure.

[0045] A sealing sleeve 20 is provided on the surface of the conical block 19 , and the sealing sleeve 20 can improve the stability of the sealing of the conical block 19 to the fixing sleeve 18 .

[0046] With the above structure, the connecting pipe 5 is connected to the sealed container. With the change of environment, when the air pressure of the external environment is lower than the air pressure in the container, the air pressure in the container will push the piston 6, so that a gap will be generated between the piston 6 and the bottom of the inner wall of the valve body 1. Then, the through hole 1 2 and the through hole 2 3 will be connected, and the excess gas in the container will enter the valve body 1 and be discharged to the outside through the through hole 1 2. When the air pressure inside the container is consistent with the air pressure of the external environment, the piston 6 will seal the through hole 1 2 and the through hole 2 3 again under the push of the spring 1 8.

[0047] When the external environment pressure is greater than the air pressure inside the container, the external air pressure will push the conical block 19, causing the one-way vent assembly 15 to lose its airtightness. At this time, the gas from the external environment will enter the container through the one-way vent assembly 15, making the internal air pressure of the container balanced with the external pressure. After the balance is achieved, the one-way vent assembly 15 will be sealed again.

[0048] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A gas pressure regulating valve, characterized in that: It comprises a valve body (1), the bottom of the valve body (1) is provided with a through hole 1 (2) and a through hole 2 (3), a piston (6) is slidably arranged in the valve body (1), and the bottom of the piston (6) is capable of sealing the through hole 1 (2) and the through hole 2 (3); A spring (8) is provided in the valve body (1) for supporting the piston (6) so that the piston (6) is close to the bottom of the valve body (1); an adjustment component (9) is provided in the valve body (1) for adjusting the strength of the spring (8) supporting the piston (6); The piston (6) is provided with a hole (16), and the hole (16) corresponds to the second through hole (3); A one-way ventilation component (15) is arranged in the hole (16), and the air circulation direction of the one-way ventilation component (15) is that the external air passes through the one-way ventilation component (15) and the second through hole (3) in sequence.

2. The air pressure regulating valve according to claim 1, characterized in that: A fixing plate (11) is fixed on the valve body (1), a guide rod (10) is vertically slidably arranged on the fixing plate (11), and the lower end of the guide rod (10) is fixed to the piston (6), and the spring 1 (8) is arranged on the surface of the guide rod (10).

3. The air pressure regulating valve according to claim 2, characterized in that: The adjustment assembly (9) comprises a slide bar (13) and a bolt (14); the slide bar (13) is slidably arranged on a fixed plate (11); a top plate (12) is slidably arranged on the surface of the guide rod (10); the slide bar (13) is fixed to the top plate (12); the bolt (14) is vertically threadedly connected to the fixed plate (11); and an end of the bolt (14) corresponds to a side of the top plate (12) that is opposite to the spring (8).

4. The air pressure regulating valve according to claim 3, characterized in that: The two ends of the spring (8) are in contact with the opposite surfaces of the piston (6) and the top plate (12) respectively.

5. The air pressure regulating valve according to claim 1, characterized in that: Sealing pads (7) are provided on both sides of the piston (6).

6. The air pressure regulating valve according to claim 1, characterized in that: The second through hole (3) is connected to a connecting pipe (5), and the valve body (1) is provided with a mounting frame (4).

7. The air pressure regulating valve according to claim 1, characterized in that: The one-way ventilation assembly (15) comprises a sleeve (17) and a fixing rod (25), wherein the sleeve (17) is fixed in the hole (16), a fixing sleeve (18) is fixed in the sleeve (17), the fixing rod (25) is vertically fixed on the piston (6), and a connecting plate (23) and a second top plate (26) are slidably provided on the surface of the fixing rod (25), a second spring (27) is slidably provided on the surface of the fixing rod (25), and two ends of the second spring (27) are respectively fixed to the second top plate (26) and the piston (6), a second bolt (24) is vertically threadedly connected on the connecting plate (23), and the end of the second bolt (24) corresponds to the second top plate (26), a connecting rod (22) is fixed on the connecting plate (23), and the connecting rod (22) passes through the fixing sleeve (18) and is fixed with a conical block (19) for blocking the fixing sleeve (18).

8. The air pressure regulating valve according to claim 7, characterized in that: A sealing sleeve (20) is provided on the surface of the conical block (19).

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