Double-layer sealing structure air valve with high sealing performance

Abstract

The utility model relates to the technical field of air valves, in particular to a high-sealing-performance air valve with a double-layer sealing structure, which comprises an air valve main body and an inner inserting pipe fixedly arranged at the end part of the air valve main body, an outer thread bushing is sleeved outside the inner inserting pipe, and the end part of the outer thread bushing is fixedly arranged on the air valve main body. An end pipe body of the inner inserting pipe extends out of the outer threaded sleeve, a front annular clamping groove and a rear annular clamping groove which are symmetrical to each other are formed in the portion, exposed out of the outer threaded sleeve, of the end pipe body of the inner inserting pipe, annular sealing rings are clamped in the annular clamping grooves in a matched mode, an outer connecting pipe is arranged on one side of the inner inserting pipe, and a threaded end is fixedly installed at the end of the outer connecting pipe. The inner inserting pipe is located in the threaded end and matched with the threaded end in an inserting mode, and the outer threaded sleeve is arranged on the threaded end in a sleeving mode and connected with the threaded end in a threaded mode. The sealing structure is provided with multiple sealing structures, and the sealing effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air valves, in particular to an air valve with a double-layer sealing structure having high sealing performance. Background Art

[0002] An air valve is a common valve that can control gas pressure. It is generally installed on the corresponding container or on the pipe installed on the container. When the gas pressure in the pipe or container reaches the limit, the air valve will automatically open and release some gas to achieve the effect of pressure relief protection.

[0003] There are many types of gas valves on the market. Most of them are usually installed with a double-layer sealing ring structure or directly use waterproof raw tape to wrap around the valve body, and then screw it into the external pipe to achieve the sealing operation. This type of sealing structure has limited sealing and is prone to leakage. Once a leak occurs, the gas valve will not be able to function properly, making the gas valve unable to control gas pressure. In view of this, we have proposed a high-sealing double-layer sealing structure gas valve. Utility Model Content

[0004] The purpose of the present invention is to provide a double-layer sealing structure gas valve with high sealing performance to solve the defects mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A high-sealing double-layer sealing structure air valve comprises an air valve body and an inner plug-in tube fixedly installed at the end of the air valve body, the outer sleeve of the inner plug-in tube is provided with an external threaded sleeve, the end of the external threaded sleeve is fixedly installed on the air valve body, the end tube body of the inner plug-in tube extends from the external threaded sleeve, and the end tube body of the inner plug-in tube exposed outside the external threaded sleeve is provided with two mutually symmetrical annular grooves in front and behind, and an annular sealing ring is snapped in fit in the annular groove, an external tube is provided on one side of the inner plug-in tube, and a threaded end is fixedly installed at the end of the external tube, the inner plug-in tube is located in the threaded end and plugged in with the threaded end, and the external threaded sleeve is sleeved on the threaded end and threadedly connected to the threaded end.

[0007] Preferably, an annular groove having one end connected to the outside is provided inside the external threaded sleeve, and the internal plug-in tube is provided at the center of the annular groove along the depth direction of the annular groove.

[0008] Preferably, a limiting ring is fixedly installed on the end tube body of the external tube close to the threaded end, and the limiting ring is located on the front side of the external threaded sleeve.

[0009] Preferably, a sealing ring is sleeved on the threaded end, and the external threaded sleeve presses the sealing ring tightly against the front side surface of the limiting ring.

[0010] Preferably, a hexagonal protrusion is fixedly mounted on the shell of the air valve body, and the cross section of the hexagonal protrusion is hexagonal.

[0011] Preferably, reinforcement rings are fixedly mounted on both the front and rear side surfaces of the hexagonal protrusion, and the reinforcement rings are fixedly mounted on the shell of the air valve body.

[0012] Preferably, a reinforcement end head is fixedly mounted on the side surface of the reinforcement ring, the reinforcement end head on the rear side is fixedly mounted on the shell of the air valve body, and the reinforcement end head on the front side is fixedly mounted on the external threaded sleeve.

[0013] Preferably, the reinforcement end head is in the shape of a hollow truncated cone, and the outer diameter of the reinforcement end head increases gradually toward one side of the reinforcement ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model has an internal plug-in tube that is plugged into the threaded end, and the external threaded sleeve is tightened on the threaded end to achieve a fixing effect. The two annular sealing rings on the internal plug-in tube are inserted into the threaded end and rest against the inner wall of the threaded end, thereby achieving a double sealing effect, which can achieve a high sealing and avoid leakage.

[0016] 2. The utility model provides a limit ring and a sealing ring, which can tighten the external threaded sleeve to the threaded end to perform further sealing operations and improve the sealing effect. The provided hexagonal protrusion can be used in conjunction with an external wrench. The provided reinforcement ring and reinforcement end can ensure that the structure between the hexagonal protrusion and the air valve body and the external threaded sleeve is more firm and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 It is a partial structural diagram of the utility model;

[0020] Figure 4 This is a cross-sectional view of the external threaded sleeve of the utility model;

[0021] The meaning of each number in the figure is:

[0022] 1. Valve body; 10. External threaded sleeve; 101. Annular groove; 11. Hexagonal protrusion; 12. Reinforcement ring; 13. Reinforcement end; 14. Internal plug-in tube; 141. Annular groove; 15. Annular sealing ring;

[0023] 2. External tube; 20. Threaded end; 21. Limiting ring; 22. Sealing ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 4 The utility model provides a technical solution: a double-layer sealing structure gas valve with high sealing performance, comprising a gas valve body 1 and an inner plug-in tube 14 fixedly mounted on the end of the gas valve body 1, the outer sleeve of the inner plug-in tube 14 is provided with an outer threaded sleeve 10, the end of the outer threaded sleeve 10 is fixedly mounted on the gas valve body 1, the end tube body of the inner plug-in tube 14 extends from the outer threaded sleeve 10, and the end tube body of the inner plug-in tube 14 exposed outside the outer threaded sleeve 10 is provided with two mutually symmetrical annular grooves 141 in front and back. An annular sealing ring 15 is provided in the internal snap-fit ​​connection, an external tube 2 is provided on one side of the internal plug-in tube 14, a threaded end 20 is fixedly installed on the end of the external tube 2, the internal plug-in tube 14 is located in the threaded end 20 and is plugged into the threaded end 20, the external threaded sleeve 10 is sleeved on the threaded end 20 and is threadedly connected to the threaded end 20 to realize a fixed installation operation, the annular sealing ring 15 is against the inner wall of the threaded end 20 for sealing operation, and the front and rear two annular sealing rings 15 can achieve a double sealing effect.

[0026] In this embodiment, an annular groove 101 is provided inside the external threaded sleeve 10, one end of which is connected to the outside world. The internal plug-in tube 14 is provided at the center of the annular groove 101 along the depth direction of the annular groove 101, so that the internal plug-in tube 14 and the external threaded sleeve 10 can be assembled on the threaded end 20 more smoothly.

[0027] Specifically, a limiting ring 21 is fixedly installed on the end tube body of the external tube 2 close to the threaded end 20, and the limiting ring 21 is located on the front side of the external threaded sleeve 10; a sealing ring 22 is sleeved on the threaded end 20, and the external threaded sleeve 10 presses the sealing ring 22 against the front side surface of the limiting ring 21 to achieve a further sealing effect.

[0028] Furthermore, a hexagonal protrusion 11 is fixedly mounted on the housing of the valve body 1 . The cross section of the hexagonal protrusion 11 is hexagonal, so that the valve body 1 can be tightened with an external wrench.

[0029] In addition, reinforcement rings 12 are fixedly installed on the front and rear side surfaces of the hexagonal protrusion 11, and the reinforcement ring 12 is fixedly installed on the shell of the air valve body 1. A reinforcement end head 13 is fixedly installed on the side of the reinforcement ring 12. The rear reinforcement end head 13 is fixedly installed on the shell of the air valve body 1, and the front reinforcement end head 13 is fixedly installed on the external threaded sleeve 10, thereby increasing the fixed contact area and making the structure between the hexagonal protrusion 11, the reinforcement end head 13, the reinforcement ring 12 and the air valve body 1 and the external threaded sleeve 10 more firm and stable.

[0030] It is worth noting that the reinforcement end 13 is in the shape of a hollow frustum, and the outer diameter of the reinforcement end 13 increases gradually toward one side of the reinforcement ring 12, which is beneficial to increase the fixed contact area.

[0031] When the high-sealing double-layer sealing structure gas valve of the present invention is in use, the external pipe 2 is pre-fixed and installed on the corresponding container outside. At this time, the sealing ring 22 is put on the threaded end 20, and then the annular sealing ring 15 is clamped in the annular groove 141. Then, the inner plug-in pipe 14 is inserted along the threaded end 20, and then the external threaded sleeve 10 is tightened on the threaded end 20. The annular sealing ring 15 is pressed against the inner wall of the threaded end 20 and the external threaded sleeve 10 is used to press the sealing ring 22 against the front side of the limit ring 21 to achieve multiple sealing operations.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer sealing structure gas valve with high sealing performance, comprising a gas valve body (1) and an internal plug-in tube (14) fixedly mounted on the end of the gas valve body (1), characterized in that: The outer sleeve of the inner plug-in tube (14) is provided with an external threaded sleeve (10), the end of the external threaded sleeve (10) is fixedly mounted on the air valve body (1), the end tube body of the inner plug-in tube (14) extends out from the outer threaded sleeve (10), and the end tube body of the inner plug-in tube (14) exposed outside the outer threaded sleeve (10) is provided with two mutually symmetrical annular grooves (141) in front and back, and an annular sealing ring (15) is snap-fitted in the annular groove (141), an outer tube (2) is provided on one side of the inner plug-in tube (14), and a threaded end (20) is fixedly mounted on the end of the outer tube (2), the inner plug-in tube (14) is located in the threaded end (20) and is plugged into and fitted with the threaded end (20), and the external threaded sleeve (10) is sleeved on the threaded end (20) and is threadedly connected to the threaded end (20).

2. The high-sealing double-layer sealing structure gas valve according to claim 1 is characterized in that: An annular groove (101) having one end connected to the outside is provided inside the external threaded sleeve (10), and the internal insert pipe (14) is provided at the center of the annular groove (101) along the depth direction of the annular groove (101).

3. The high-sealing double-layer sealing structure gas valve according to claim 1, characterized in that: A limiting ring (21) is fixedly mounted on the end tube body of the external tube (2) close to the threaded end (20), and the limiting ring (21) is located on the front side of the external threaded sleeve (10).

4. The high-sealing double-layer sealing structure gas valve according to claim 3 is characterized in that: A sealing ring (22) is sleeved on the threaded end (20), and the external threaded sleeve (10) presses the sealing ring (22) tightly against the front side of the limiting ring (21).

5. The high-sealing double-layer sealing structure gas valve according to claim 1, characterized in that: A hexagonal protrusion (11) is fixedly mounted on the shell of the air valve body (1), and the cross section of the hexagonal protrusion (11) is hexagonal.

6. The high-sealing double-layer sealing structure gas valve according to claim 5, characterized in that: Reinforcement rings (12) are fixedly mounted on both the front and rear side surfaces of the hexagonal protrusion (11), and the reinforcement rings (12) are fixedly mounted on the housing of the air valve body (1).

7. The high-sealing double-layer sealing structure gas valve according to claim 6, characterized in that: A reinforcement end head (13) is fixedly mounted on the side of the reinforcement ring (12); the rear reinforcement end head (13) is fixedly mounted on the housing of the air valve body (1); and the front reinforcement end head (13) is fixedly mounted on the external threaded sleeve (10).

8. The high-sealing double-layer sealing structure gas valve according to claim 7, characterized in that: The reinforcement end head (13) is in the shape of a hollow truncated cone, and the outer diameter of the reinforcement end head (13) increases gradually toward one side of the reinforcement ring (12).

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