One-way valve

Abstract

The one-way valve comprises a valve body, a piston assembly and an isolation piece, an air inlet channel, a valve cavity and an air outlet channel are formed in the valve body, and the air inlet channel communicates with the air outlet channel through the valve cavity; the piston assembly is arranged in the area where the valve cavity is located, the piston assembly comprises a sealing piece and a spring, the spring is assembled between the sealing piece and the valve body in a pre-compression mode, and the sealing piece can block the air inlet channel under pushing of the spring; and at least part of the isolation piece is arranged on the spring in a sleeving mode, a connecting channel is formed between the isolation piece and the cavity wall of the valve cavity, and the isolation piece can isolate gas conducted in the connecting channel from the spring and is used for limiting the spring from shaking under the action of airflow. According to the one-way valve, at least part of gas conducted in the valve cavity is isolated from the spring through the isolation piece, so that the spring can be limited from shaking under the action of airflow, whistling can be avoided when the one-way valve works, and the function of improving the product performance is achieved.

Description

Technical Field

[0001] The present application relates to the technical field related to flow control, and in particular to a one-way valve. Background Art

[0002] A one-way valve is a valve that allows fluid to flow only along the inlet, but not back through the outlet. It is commonly known as a one-way valve. A one-way valve is used in hydraulic systems to prevent oil from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction.

[0003] Among them, when the one-way valve used in the pneumatic system is working, since the spring inside the one-way valve used to control the plug to one-way block the air inlet channel is completely exposed in the valve cavity of the one-way valve, the spring will vibrate under the action of the airflow and produce a whistling sound, which will reduce the product performance of the one-way valve. Utility Model Content

[0004] In view of this, it is necessary to provide a one-way valve that can solve the above technical problems.

[0005] In order to solve the above technical problems, this application provides the following technical solutions:

[0006] A one-way valve, comprising:

[0007] A valve body, formed with an air inlet channel, a valve cavity and an air outlet channel, wherein the air inlet channel and the air outlet channel are connected through the valve cavity;

[0008] A piston assembly is arranged in the area where the valve cavity is located, and the piston assembly includes a seal and a spring. The spring is assembled between the seal and the valve body in a pre-compressed manner, and the seal can block the air inlet passage under the push of the spring;

[0009] An isolation member is at least partially mounted on the spring, a connecting channel is formed between the isolation member and the cavity wall of the valve cavity, and the isolation member can isolate the gas conducted in the connecting channel from the spring to limit the shaking of the spring under the action of the airflow.

[0010] It can be understood that at least part of the gas conducted in the valve cavity is isolated from the spring by an isolation piece, which can limit the shaking of the spring under the action of the airflow, thereby avoiding the generation of whistling sound when the one-way valve is working, and has the effect of improving product performance; at the same time, since the isolation piece is mounted on the outside of the spring, the one-way valve can be realized by adding an isolation piece on the basis of the original structure, which has a simplified structure and is convenient for the production and preparation of the one-way valve.

[0011] In one of the embodiments, a limiting protrusion is formed on the sealing member, and the spring is sleeved on the limiting protrusion and abuts against the sealing member.

[0012] It can be understood that the spring is sleeved on the limiting protrusion of the seal and abuts against the seal. In this way, the limiting protrusion can be used to limit the assembly of the spring on the seal and ensure the stability of the abutment between the spring and the seal.

[0013] In one embodiment, the insulating member is mounted on the sealing member;

[0014] Wherein, the insulating member can perform telescopic movement relative to the spring under the drive of the sealing member.

[0015] In one embodiment, the one-way valve further comprises a support seat, which is disposed on the valve body and abuts against an end of the spring away from the sealing member, and is used to support the spring;

[0016] Wherein, a transition channel is formed on the support seat, and the transition channel is communicated with the air outlet channel and the connecting channel respectively.

[0017] It can be understood that the transition channel formed on the support seat is connected to the air outlet channel and the connecting channel respectively, so that the gas conducted in the connecting channel can be discharged to the air outlet channel through the transition channel on the support seat, so that the setting of the isolation part will not affect the flow of gas in the one-way valve.

[0018] In one embodiment, the support base includes a support block and a plurality of support legs, wherein the plurality of support legs are disposed on the periphery of the support block and are respectively connected to the support block;

[0019] Wherein, two adjacent supporting legs are surrounded to form the transition channel, and the supporting block is in contact with the spring.

[0020] In one of the embodiments, the spring is configured as a compression spring;

[0021] Wherein, the upper part of the support block is raised and formed with an extended protrusion, and the compression spring is sleeved on the extended protrusion.

[0022] It is understandable that the compression spring is sleeved on the extended protrusion of the support block. In this way, the extended protrusion can be used to limit the assembly of the compression spring on the support block and ensure the stability of the abutment between the support block and the compression spring.

[0023] In one embodiment, the insulating member is configured as a heat shrink tube, and the heat shrink tube is assembled to the spring in a tight fit;

[0024] Wherein, one end of the spring away from the sealing member is arranged on the outside of the heat shrink tube.

[0025] It is understandable that the spring is partially wrapped with a heat shrink tube to limit the vibration of the spring under the action of the airflow, which can meet the use requirement of avoiding the howling sound when the one-way valve is working.

[0026] In one embodiment, the spring is configured as a pagoda spring;

[0027] Wherein, the large-diameter end of the pagoda spring is arranged on the outside of the heat shrink tube and abuts against the valve body.

[0028] It is understandable that the spring is set as a pagoda spring and the structural characteristics of the pagoda spring are utilized so that when the outer part of the pagoda spring set on the heat shrink tube is compressed, there can be a larger gap for the gas conducted in the connecting channel to pass through.

[0029] In one embodiment, the valve body includes a first sub-valve body and a second sub-valve body, and the first sub-valve body is connected and communicated with the second sub-valve body;

[0030] Wherein, the air inlet passage is arranged on the first sub-valve body, and the air outlet passage is arranged on the second sub-valve body.

[0031] It can be understood that the first sub-valve body and the second sub-valve body are independently provided and combined to form a valve body, which can facilitate the production and preparation of the valve body.

[0032] In one embodiment, the first sub-valve body and the second sub-valve body are connected by threads;

[0033] Wherein, a sealing ring is arranged between the first sub-valve body and the second sub-valve body for assembling and sealing the first sub-valve body and the second sub-valve body.

[0034] It can be understood that the first sub-valve body is connected to the second sub-valve body in a threaded manner, so that the assembly connection of the first sub-valve body on the second sub-valve body can be facilitated; and a sealing ring is used to achieve the assembly seal between the first sub-valve body and the second sub-valve body, so that the assembly seal between the first sub-valve body and the second sub-valve body can be ensured to avoid leakage.

[0035] Due to the application of the above solution, the present application has the following advantages compared with the prior art:

[0036] The one-way valve for which protection is sought in the present application uses an isolation member to isolate at least part of the gas conducted in the valve cavity from the spring, thereby limiting the shaking of the spring under the action of the airflow, thereby avoiding the generation of whistling sounds when the one-way valve is working, and having the effect of improving product performance; at the same time, since the isolation member is mounted on the outside of the spring, the one-way valve can be realized by adding an isolation member on the basis of the original structure, which has a simplified structure and is convenient for the production and preparation of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic diagram of the structure of a one-way valve provided in one embodiment of the present application;

[0039] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0040] Figure 3 This is a schematic diagram of the assembly of a support seat, a spring, an isolation member and a sealing member provided in one embodiment of the present application;

[0041] Figure 4 A schematic diagram of the structure of a one-way valve provided in one embodiment of the present application.

[0042] : 100, one-way valve; 10, valve body; 101, air inlet channel; 102, valve chamber; 103, air outlet channel; 11, first sub-valve body; 12, second sub-valve body; 13, sealing ring; 20, piston assembly; 21, sealing member; 211, limiting protrusion; 22, spring; 30, insulating member; 31, heat shrink tube; 301, connecting channel; 40, support seat; 401, transition channel; 41, support block; 411, extension protrusion; 42, support foot. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0048] The one-way valve 100 for which protection is sought in the present application is applied in a pneumatic system to prevent the reverse flow of compressed air.

[0049] like Figures 1 to 4As shown, a one-way valve 100 provided in an embodiment of the present application includes a valve body 10, a piston assembly 20 and an isolating member 30. The valve body 10 is formed with an air inlet channel 101, a valve cavity 102 and an air outlet channel 103, and the air inlet channel 101 is connected to the air outlet channel 103 through the valve cavity 102; the piston assembly 20 is arranged in the area where the valve cavity 102 is located, and the piston assembly 20 includes a sealing member 21 and a spring 22. The spring 22 is assembled between the sealing member 21 and the valve body 10 in a pre-compressed manner, and the sealing member 21 can block the air inlet channel 101 under the push of the spring; the isolating member 30 is at least partially mounted on the spring 22, and a connecting channel 301 is formed between the isolating member 30 and the cavity wall (not shown) of the valve cavity 102, and the isolating member 30 can isolate the gas (not shown) conducted in the connecting channel 301 from the spring 22, so as to limit the vibration of the spring 22 under the action of the airflow.

[0050] It can be understood that the isolation member 30 is used to isolate at least part of the gas conducted in the valve chamber 102 from the spring 22, which can limit the shaking of the spring 22 under the action of the airflow, thereby avoiding the generation of whistling sound when the one-way valve 100 is working, and has the effect of improving product performance; at the same time, since the isolation member 30 is mounted on the outside of the spring 22, the one-way valve 100 can be realized by adding the isolation member 30 on the basis of the original structure, which has a simplified structure and is convenient for the production and preparation of the one-way valve 100.

[0051] like Figure 1 , Figure 2 As shown, in one embodiment, the valve body 10 includes a first sub-valve body 11 and a second sub-valve body 12, and the first sub-valve body 11 and the second sub-valve body 12 are connected and communicated with each other; wherein, the air inlet channel 101 is provided on the first sub-valve body 11, and the air outlet channel 103 is provided on the second sub-valve body 12. That is to say, the first sub-valve body 11 and the second sub-valve body 12 are independently provided and combined to form the valve body 10, so that the production and preparation of the valve body 10 can be facilitated.

[0052] like Figure 1 , Figure 2As shown, in one embodiment, the first sub-valve body 11 and the second sub-valve body 12 are connected in a threaded manner; wherein a sealing ring 13 is provided between the first sub-valve body 11 and the second sub-valve body 12 for assembling and sealing the first sub-valve body 11 and the second sub-valve body 12. That is to say, the first sub-valve body 11 is connected to the second sub-valve body 12 in a threaded manner, so that the assembly connection of the first sub-valve body 11 on the second sub-valve body 12 can be facilitated; and the sealing ring 13 is used to achieve the assembly seal between the first sub-valve body 11 and the second sub-valve body 12, so that the assembly seal between the first sub-valve body 11 and the second sub-valve body 12 can be ensured to avoid leakage. Of course, the assembly method between the first sub-valve body 11 and the second sub-valve body 12 is not limited to the above-mentioned one. For those skilled in the art, the first sub-valve body 11 and the second sub-valve body 12 can also be assembled and connected by welding, which will not be elaborated here.

[0053] like Figure 2 , Figure 3 As shown, in one embodiment, a limiting convex portion 211 is formed on the seal 21, and the spring 22 is mounted on the limiting convex portion 211 and abuts against the seal 21. In other words, the spring 22 is mounted on the limiting convex portion 211 of the seal 21 and abuts against the seal 21, so that the limiting convex portion 211 can be used to limit the assembly of the spring 22 on the seal 21 and ensure the stability of the abutment between the spring 22 and the seal 21.

[0054] like Figure 2 , Figure 3 As shown, in one embodiment, the isolating member 30 is installed on the sealing member 21 ; wherein the isolating member 30 can perform telescopic movement relative to the spring 22 driven by the sealing member 21 .

[0055] In this embodiment, one end of the spring 22 away from the sealing member 21 partially extends outward relative to the isolation member 30. That is, when the one-way valve 100 is in the initial state, one or two turns of the spring 22 are reserved and not covered by the isolation member 30, so that the isolation member 30 can perform telescopic movement relative to the spring 22 driven by the sealing member 21.

[0056] like Figure 2 , Figure 3 As shown, in one embodiment, the insulating member 30 and the sealing member 21 may be provided as an integral structure.

[0057] like Figure 2 , Figure 3As shown, in one embodiment, the one-way valve 100 further includes a support seat 40, which is disposed on the valve body 10 and abuts against an end of the spring 22 away from the sealing member 21, and is used to support the spring 22; wherein a transition channel 401 is formed on the support seat 40, and the transition channel 401 is respectively connected to the gas outlet channel 103 and the connecting channel 301. In other words, the transition channel 401 formed on the support seat 40 is respectively connected to the gas outlet channel 103 and the connecting channel 301, so that the gas conducted in the connecting channel 301 can be discharged to the gas outlet channel 103 through the transition channel 401 on the support seat 40, so that the setting of the isolation member 30 will not affect the flow of gas in the one-way valve 100.

[0058] like Figure 2 , Figure 3 As shown, in one embodiment, the support seat 40 includes a support block 41 and a plurality of support legs 42, wherein the plurality of support legs 42 are arranged on the periphery of the support block 41 and are respectively connected to the support block 41; wherein two adjacent support legs 42 are surrounded to form a transition channel 401, and the support block 41 abuts against the spring 22.

[0059] like Figure 2 , Figure 3 As shown, in one embodiment, the spring 22 is configured as a compression spring, wherein the upper portion of the support block 41 is convex and formed with an extension convex portion 411, and the compression spring is sleeved on the extension convex portion 411. In other words, the compression spring is sleeved on the extension convex portion 411 of the support block 41, so that the extension convex portion 411 can be used to limit the assembly of the compression spring on the support block 41 and ensure the stability of the abutment between the support block 41 and the compression spring.

[0060] As can be seen from the above, when the one-way valve 100 is applied to a pneumatic system and is working, the gas in the air inlet channel 101 can push the seal 21 to compress the spring 22 to move, and open the seal 21 to block the air inlet channel 101, and the gas enters the valve chamber 102. At the same time, the isolation member 30 moves toward the support seat 40 driven by the seal 21 and covers the spring 22. At this time, the isolation member 30 can isolate at least part of the gas conducted in the valve chamber 102 from the spring 22, so as to limit the shaking of the spring 22 under the action of the airflow, thereby avoiding the generation of whistling sound when the one-way valve 100 is working.

[0061] like Figure 4As shown, in one embodiment, the insulating member 30 is configured as a heat shrink tube 31, and the heat shrink tube 31 is assembled to the spring 22 in a tight fit; wherein, one end of the spring 22 away from the sealing member 21 is arranged on the outside of the heat shrink tube 31. In other words, the heat shrink tube 31 is used to partially wrap the spring 22 to limit the vibration of the spring 22 under the action of the airflow, so as to meet the use requirement of avoiding the whistling sound when the one-way valve 100 is working. In this embodiment, the heat shrink tube 31 can be assembled to the spring 22 by blow molding.

[0062] like Figure 4 As shown, in one embodiment, the spring 22 is configured as a pagoda spring, wherein the large-diameter end of the pagoda spring is disposed outside the heat shrink tube 31 and abuts against the valve body 10. That is, the spring 22 is configured as a pagoda spring, and the structural characteristics of the pagoda spring are utilized so that when the outer portion of the pagoda spring disposed on the heat shrink tube 31 is compressed, a larger gap can be provided for the gas conducted in the connecting channel 301 to pass through.

[0063] In summary, the one-way valve 100 for which protection is requested in the present application uses an isolation member 30 to isolate at least part of the gas conducted in the valve chamber 102 from the spring 22, thereby limiting the shaking of the spring 22 under the action of the airflow, thereby avoiding the generation of whistling sounds when the one-way valve 100 is working, and having the effect of improving product performance; at the same time, since the isolation member 30 is mounted on the outside of the spring 22, the one-way valve 100 can be realized by adding an isolation member 30 on the basis of the original structure, which has a simplified structure and is convenient for the production and preparation of the one-way valve 100.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A one-way valve, characterized in that: The one-way valve (100) comprises: A valve body (10) is formed with an air inlet channel (101), a valve cavity (102) and an air outlet channel (103), wherein the air inlet channel (101) and the air outlet channel (103) are connected via the valve cavity (102); A piston assembly (20) is arranged in the area where the valve chamber (102) is located, the piston assembly (20) comprises a sealing member (21) and a spring (22), the spring (22) is assembled between the sealing member (21) and the valve body (10) in a pre-compressed manner, and the sealing member (21) can block the air intake passage (101) under the push of the spring (22); An isolation member (30) is at least partially mounted on the spring (22), a connecting channel (301) is formed between the isolation member (30) and the cavity wall of the valve cavity (102), and the isolation member (30) is capable of isolating the gas conducted in the connecting channel (301) from the spring (22), so as to limit the vibration of the spring (22) under the action of the airflow.

2. The one-way valve according to claim 1, characterized in that: A limiting convex portion (211) is formed on the sealing member (21), and the spring (22) is sleeved on the limiting convex portion (211) and abuts against the sealing member (21).

3. The one-way valve according to claim 1, characterized in that: The insulating member (30) is mounted on the sealing member (21); Wherein, the insulating member (30) can perform telescopic movement relative to the spring (22) under the drive of the sealing member (21).

4. The one-way valve according to claim 3, characterized in that: The one-way valve (100) further comprises a support seat (40), wherein the support seat (40) is arranged on the valve body (10) and abuts against an end of the spring (22) away from the sealing member (21), and is used to support the spring (22); Wherein, a transition channel (401) is formed on the support seat (40), and the transition channel (401) is respectively connected to the air outlet channel (103) and the connecting channel (301).

5. The one-way valve according to claim 4, characterized in that: The support seat (40) comprises a support block (41) and a plurality of support legs (42), wherein the plurality of support legs (42) are arranged on the periphery of the support block (41) and are respectively connected to the support block (41); Wherein, two adjacent support legs (42) are enclosed to form the transition channel (401), and the support block (41) is in contact with the spring (22).

6. The one-way valve according to claim 5, characterized in that: The spring (22) is configured as a compression spring; The upper portion of the support block (41) is raised and forms an extended protrusion (411), and the compression spring is sleeved on the extended protrusion (411).

7. The one-way valve according to claim 1, characterized in that: The insulating member (30) is configured as a heat shrink tube, and the heat shrink tube is assembled onto the spring (22) in a tight fit; Wherein, one end of the spring (22) away from the sealing member (21) is arranged on the outside of the heat shrink tube.

8. The one-way valve according to claim 7, characterized in that: The spring (22) is configured as a pagoda spring; Wherein, the large-diameter end of the pagoda spring is arranged on the outside of the heat shrink tube and abuts against the valve body (10).

9. The one-way valve according to claim 1, characterized in that: The valve body (10) comprises a first sub-valve body (11) and a second sub-valve body (12), wherein the first sub-valve body (11) and the second sub-valve body (12) are connected and communicated with each other; Wherein, the air inlet passage (101) is arranged on the first sub-valve body (11), and the air outlet passage (103) is arranged on the second sub-valve body (12).

10. The one-way valve according to claim 9, characterized in that: The first sub-valve body (11) and the second sub-valve body (12) are connected in a threaded manner; A sealing ring (13) is provided between the first sub-valve body (11) and the second sub-valve body (12) for sealing the first sub-valve body (11) and the second sub-valve body (12) during assembly.

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