High-pressure air check valve

Abstract

The utility model discloses a high-pressure air check valve which comprises a valve body, a first containing groove, a connector, a first flow channel, a first outer hexagon, a first flange, a valve deck, a second flow channel, a second outer hexagon, a groove, a first sealing ring, a valve element, a second containing groove, a spring, a through hole, a step groove and a second sealing ring. A threaded hole is formed in the valve body, the threaded hole is connected to the other end of the first containing groove in a communicating mode, an external thread is arranged on the valve cover, and the external thread is connected into the threaded hole in a threaded mode; the valve element is made of the hard corrosion-resistant material, the second sealing ring is additionally arranged on the valve element, the strength of the valve element is guaranteed, meanwhile, the air tightness is improved, the valve element has the advantage of being simple in structure, the valve element accommodates the spring through the second accommodating groove, the valve body guides the valve element through the first accommodating groove, and the service life of the valve element is prolonged. And the valve body and the valve cover are assembled in a threaded connection manner, so that the assembly is quicker and more convenient, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a high-pressure air check valve. Background Art

[0002] A check valve is a valve that automatically opens or closes the valve disc depending on the flow of the medium itself and is used to prevent the medium from flowing back. As an automatic valve, the air check valve mainly serves to release the high-pressure gas inside the pipeline. Existing air check valves have the following defects when in use: First, the valve core of the air check valve includes two types: a hard valve core and a colloid valve core. The hard valve core has high strength, good corrosion resistance and wear resistance, but its sealing performance is lower than that of the colloid valve core. The colloid valve core fits tightly with the cavity of the valve body through the elasticity of the material itself, and has good air tightness, but is easy to damage. Once the surface of the colloid valve core is scratched, the air tightness will deteriorate; second, the valve core structure of the existing air check valve is complex, and a guide rod needs to be used to install a spring to guide the movement of the valve core, and the overall assembly is inconvenient, which greatly reduces production efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a high-pressure air check valve to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a high-pressure air check valve, comprising a valve body, a valve cover and a valve core, the valve body being slidably connected with the valve core, a spring being installed at one end of the valve core, one end of the spring being arranged in the valve core, and the other end being arranged in the valve body, a step groove being provided at the other end of the valve core, a second sealing ring being sleeved in the step groove, a valve cover being provided on one side of the second sealing ring, and the valve cover being threadedly connected to the valve body.

[0005] Preferably, a first accommodating groove is opened in the valve body, and the valve core is sleeved in the first accommodating groove, a joint is fixedly connected to an outer wall of one side of the valve body, a first flow channel is opened in the joint, and the first flow channel is conductively connected to one end of the first accommodating groove.

[0006] Preferably, a first flange is provided on the joint.

[0007] Preferably, a threaded hole is provided in the valve body, and the threaded hole is connected to the other end of the first accommodating groove, and an external thread is provided on the valve cover, and the external thread is threadedly connected to the threaded hole.

[0008] Preferably, a first external hexagonal socket is provided on the valve body, and a second external hexagonal socket is provided on the valve cover.

[0009] Preferably, a second flow channel is opened in the valve cover, and one end of the valve core is inserted into the second flow channel.

[0010] Preferably, a groove is formed on the valve cover, and the groove is arranged on one side of the second outer hexagon, a first sealing ring is sleeved in the groove, and the first sealing ring is sleeved in the valve body.

[0011] Preferably, a second accommodating groove is provided in the valve core, and the spring is sleeved in the second accommodating groove, and through holes are provided on inner walls on both sides of the second accommodating groove.

[0012] Preferably, a second flange is provided at one end of the valve core, and the second flange is slidably connected to the first accommodating groove.

[0013] The high-pressure air check valve provided by the utility model has the following advantages: the valve core of the utility model is made of hard and corrosion-resistant material, and a second sealing ring is added thereon to improve the air tightness while ensuring the strength of the valve core, and the valve core has the advantage of a simple structure, the valve core accommodates the spring through the second accommodating groove, the valve body guides the valve core through the first accommodating groove, and the valve body and the valve cover are assembled in a threaded connection manner, so the assembly is faster and more convenient, which can improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 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.

[0015] Figure 1 It is a schematic diagram of the overall main cutaway structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall main structure of the utility model.

[0018] In the figure: 1. valve body; 11. first accommodating groove; 12. joint; 13. first flow channel; 14. threaded hole; 15. first external hexagon; 16. first flange; 2. valve cover; 21. second flow channel; 22. second external hexagon; 23. groove; 24. first sealing ring; 25. external thread; 3. valve core; 31. second accommodating groove; 32. spring; 33. through hole; 34. second flange; 35. step groove; 36. second sealing ring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment 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.

[0020] See also Figure 1-3The utility model provides an embodiment: a high-pressure air check valve, comprising a valve body 1, a valve cover 2 and a valve core 3, wherein the valve core 3 is slidably connected in the valve body 1, a spring 32 is installed at one end of the valve core 3, and one end of the spring 32 is arranged in the valve core 3, and the other end is arranged in the valve body 1, a step groove 35 is provided at the other end of the valve core 3, a second sealing ring 36 is sleeved in the step groove 35, a valve cover 2 is arranged on one side of the second sealing ring 36, and the valve cover 2 is threadedly connected in the valve body 1, the valve body 1, the valve cover 2 and the valve core 3 constitute a check valve structure, the valve core 3 uses the second sealing ring 36 in the step groove 35 to close the valve cover 2, and has good air tightness; the valve body 1 is provided with a check valve structure, and the valve core 3 uses the second sealing ring 36 in the step groove 35 to close the valve cover 2, and has good air tightness; A first receiving groove 11 is provided, and the valve core 3 is sleeved in the first receiving groove 11. A joint 12 is fixedly connected to the outer wall of one side of the valve body 1. A first flow channel 13 is provided in the joint 12, and the first flow channel 13 is connected to one end of the first receiving groove 11. The first receiving groove 11 is used to accommodate the valve core 3, the joint 12 is used to plug the air pipe, and the first flow channel 13 is used for gas circulation; a first flange 16 is provided on the joint 12, and the first flange 16 is used to prevent the air pipe from falling off; a threaded hole 14 is provided in the valve body 1, and the threaded hole 14 is connected to the other end of the first receiving groove 11, and an external thread 25 is provided on the valve cover 2, and the external thread 25 is threaded The thread is connected to the threaded hole 14, and the threaded hole 14 is used to cooperate with the external thread 25 to realize the threaded connection between the valve body 1 and the valve cover 2; the valve body 1 is provided with a first external hexagon 15, and the valve cover 2 is provided with a second external hexagon 22, and the first external hexagon 15 and the second external hexagon 22 cooperate with each other to facilitate the twisting of the valve cover 2; a second flow channel 21 is opened in the valve cover 2, and one end of the valve core 3 is inserted in the second flow channel 21, and the second flow channel 21 is used for gas circulation; a groove 23 is opened on the valve cover 2, and the groove 23 is arranged on one side of the second external hexagon 22, and a first sealing ring 24 is sleeved in the groove 23, and the first sealing ring 24 is sleeved in the valve body 1, and the groove 23 is used to accommodate the first sealing ring 24, and the first sealing ring 24 is used to improve the air tightness between the valve cover 2 and the valve body 1; a second accommodating groove 31 is opened in the valve core 3, and the spring 32 is sleeved in the second accommodating groove 31, and through holes 33 are opened on the inner walls on both sides of the second accommodating groove 31, the second accommodating groove 31 is used to accommodate the spring 32, and the through holes 33 are used for gas circulation; a second flange 34 is provided at one end of the valve core 3, and the second flange 34 is slidably connected in the first accommodating groove 11, the second flange 34 is used to make a gap between the valve core 3 and the valve body 1, so that the gas can enter the through hole 33 through the gap, and the valve core 3 is made of hard and corrosion-resistant material.

[0021] Working principle: When assembling and using the utility model, first install the spring 32 into the second receiving groove 31, install the second sealing ring 36 into the step groove 35, then install the valve core 3 into the first receiving groove 11, install the first sealing ring 24 into the groove 23, and tighten the valve cover 2 into the threaded hole 14 through the external thread 25 to achieve the installation of the valve cover 2 and the valve body 1, so that one end of the valve core 3 is inserted into the second flow channel 21, and the assembly is completed. When in use, when high-pressure air enters from the second flow channel 21, it will push the valve core 3, so that the valve core 3 passes through the second flange 34 along the The inner wall of the first receiving groove 11 slides, and the spring 32 is compressed at the same time, and the high-pressure air enters the second receiving groove 31 through the through hole 33, and is then discharged from the first flow channel 13 in the joint 12. When the high-pressure air enters from the first flow channel 13, under the elastic force of the spring 32, the valve core 3 blocks the second flow channel 21 through the second sealing ring 36, so that the high-pressure air cannot enter the second flow channel 21, thereby realizing the non-return function; wherein, the first outer hexagon 15 and the second outer hexagon 22 cooperate with each other to facilitate the twisting of the valve cover 2, and the first flange 16 is used to prevent the air pipe from falling off.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A high-pressure air check valve, comprising a valve body (1), a valve cover (2) and a valve core (3), characterized in that: A valve core (3) is slidably connected inside the valve body (1), a spring (32) is installed at one end of the valve core (3), one end of the spring (32) is arranged inside the valve core (3), and the other end is arranged inside the valve body (1), a step groove (35) is opened at the other end of the valve core (3), a second sealing ring (36) is sleeved in the step groove (35), a valve cover (2) is arranged on one side of the second sealing ring (36), and the valve cover (2) is threadedly connected to the valve body (1).

2. The high pressure air check valve according to claim 1, characterized in that: The valve body (1) is provided with a first receiving groove (11), and the valve core (3) is sleeved in the first receiving groove (11). A joint (12) is fixedly connected to an outer wall of one side of the valve body (1), a first flow channel (13) is provided in the joint (12), and the first flow channel (13) is conductively connected to one end of the first receiving groove (11).

3. The high pressure air check valve according to claim 2, characterized in that: The joint (12) is provided with a first flange (16).

4. The high pressure air check valve according to claim 1, characterized in that: The valve body (1) is provided with a threaded hole (14), and the threaded hole (14) is connected to the other end of the first receiving groove (11); the valve cover (2) is provided with an external thread (25), and the external thread (25) is threadedly connected to the threaded hole (14).

5. The high pressure air check valve according to claim 4, characterized in that: The valve body (1) is provided with a first external hexagon (15), and the valve cover (2) is provided with a second external hexagon (22).

6. The high pressure air check valve according to claim 1, characterized in that: A second flow channel (21) is provided in the valve cover (2), and one end of the valve core (3) is inserted into the second flow channel (21).

7. The high-pressure air check valve according to claim 6, characterized in that: The valve cover (2) is provided with a groove (23), and the groove (23) is arranged on one side of the second outer hexagon (22). A first sealing ring (24) is sleeved in the groove (23), and the first sealing ring (24) is sleeved in the valve body (1).

8. The high pressure air check valve according to claim 1, characterized in that: The valve core (3) is provided with a second receiving groove (31), and the spring (32) is sleeved in the second receiving groove (31). Through holes (33) are provided on the inner walls on both sides of the second receiving groove (31).

9. The high-pressure air check valve according to claim 8, characterized in that: A second flange (34) is provided at one end of the valve core (3), and the second flange (34) is slidably connected in the first accommodating groove (11).

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