CN216279581U - Check valve and test equipment - Google Patents

Abstract

The embodiment of the application belongs to the field of detection, and relates to a one-way valve which comprises a valve cover, a valve seat and a valve core, wherein the valve cover is detachably connected to the valve seat, a guide groove is formed in the valve seat, and the valve core is positioned in the guide groove and can move along the guide groove; the check valve is provided with an air passage which penetrates through the valve cover and the valve seat, an air inlet hole is formed at one end of the valve cover, an air outlet hole is formed at one end of the valve seat, and the valve core can block or open the air inlet hole; the valve core is provided with a gas passing surface, two ends of the gas passing surface are respectively connected to the upper end surface and the lower end surface of the valve core, and the gas passing surface is positioned in the gas path channel. The application also relates to a test device. The application provides an equal detachable check valve of each part, when arbitrary part is impaired, changes corresponding part and can make check valve normal work, has saved manufacturing cost. Meanwhile, springs and sealing rings with different specifications can be replaced so as to meet testing environments with different standards.

Description

Check valve and test equipment

Technical Field

The application relates to the technical field of detection, and more particularly relates to a check valve and test equipment.

Background

In some specialty industries (e.g., military supplies), the product is required to be tested for gas tightness at low pressure (e.g., 35kpa), and the product is determined to be rejected if the product leaks more than 5% of the nominal value every 45 minutes. Therefore, in a high-specification air tightness test environment, a check valve with better air tightness performance is particularly important, and the air tightness performance of the check valve found in the market under a low pressure (such as 35kpa) condition is poor, so that the condition for testing the product cannot be met. And the existing check valve is of an integrated structure, the air tightness performance of the check valve is fixed, the check valve can only adapt to a single test environment, and the practicability is not strong.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the embodiment of the application is how to realize that the air tightness of the one-way valve can be adjusted.

In order to solve the above technical problem, an embodiment of the present application provides a check valve and a testing device, which adopt the following technical solutions:

a one-way valve comprises a valve cover, a valve seat and a valve core, wherein the valve cover is detachably connected with the valve seat, a guide groove is formed in the valve seat, and the valve core is positioned in the guide groove and can move along the guide groove; the check valve is provided with an air passage which penetrates through the valve cover and the valve seat, an air inlet hole is formed at one end of the valve cover, an air outlet hole is formed at one end of the valve seat, and the valve core can block or open the air inlet hole; the side wall of the valve core is provided with a gas passing surface, two ends of the gas passing surface are respectively connected to the upper end surface and the lower end surface of the valve core, and the gas passing surface is positioned in the gas path channel.

Furthermore, the check valve further comprises a spring, one end of the spring is connected to the valve seat, the other end of the spring is connected to the valve core, and the valve core can move in the guide groove along the direction of compressing or releasing the spring.

Furthermore, the end face, facing the air inlet hole, of the valve core is provided with a guide post, and one end of the guide post protrudes out of the air inlet hole and is movably connected to the air inlet hole.

Furthermore, the check valve further comprises a first sealing ring, a first accommodating groove is formed in the valve core or the valve cover, and the first sealing ring is located in the first accommodating groove and is sleeved on the guide post.

Furthermore, the check valve further comprises a second sealing ring, a second accommodating groove is formed in the valve cover or the valve seat, the second accommodating groove surrounds the air inlet channel, and the second sealing ring is located in the second accommodating groove.

Further, the first sealing ring and the second sealing ring are both O-shaped sealing rings.

Furthermore, the valve seat is provided with a mounting surface which is positioned in the guide groove, the end surface of the valve core far away from the air inlet hole is provided with a limiting column, the spring is sleeved on the limiting column, one end of the spring abuts against the valve core, and the other end of the spring abuts against the mounting surface.

Furthermore, the outer side walls of the valve cover and the valve seat are respectively provided with at least one plane, and each plane extends along the axial direction of the valve cover and the valve seat.

Furthermore, the valve seat is provided with one end of the air outlet hole is provided with a connecting part, and the air outlet hole penetrates through the connecting part.

A test device comprises the check valve and a driving mechanism, wherein the driving mechanism is connected to one end, provided with the air inlet, of the check valve, and can drive the valve core to move in the guide groove.

Compared with the prior art, this embodiment provides an equal detachable check valve of each part, and the valve gap can be dismantled with the disk seat and be connected the change of the part of being convenient for. And the valve cover, the valve seat, the valve core, the sealing ring and the spring are all independent parts, when any one is damaged, the corresponding part is replaced, so that the one-way valve can normally work, the whole one-way valve does not need to be replaced, and the production cost is greatly saved. Meanwhile, the inner sealing effect of the one-way valve depends on the performances of the spring and the sealing ring, so that the spring and the sealing ring with better performances can be correspondingly replaced according to actual requirements of the one-way valve, the one-way valve is suitable for a higher-standard test environment, and the practicability of the one-way valve is greatly enhanced.

Drawings

In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a check valve provided in an embodiment of the present application.

Fig. 2 is a full sectional view of a check valve provided in an embodiment of the present application.

Fig. 3 is an exploded view of a check valve according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a valve element in an embodiment of the present application.

Reference numerals: 100. a one-way valve; 1. a valve cover; 11. an air inlet; 12. a plane; 2. a valve seat; 21. a guide groove; 22. an air outlet; 23. a second accommodating groove; 24. a mounting surface; 25. a connecting portion; 3. a valve core; 31. air passing surface; 32. a guide post; 33. a first accommodating groove; 34. a limiting column; 4. a spring; 5. a first seal ring; 6. and a second seal ring.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1-4, an embodiment of the present application provides a check valve 100, which includes a valve cover 1, a valve seat 2, and a valve core 3, wherein the valve cover 1 is detachably connected to the valve seat 2, a guide groove 21 is formed in the valve seat 2, and the valve core 3 is located in the guide groove 21 and can move along the guide groove 21. The check valve 100 is provided with an air passage passing through the valve cover 1 and the valve seat 2, an air inlet hole 11 is formed at one end of the valve cover 1, an air outlet hole 22 is formed at one end of the valve seat 2, and the valve core 3 can block or open the air inlet hole 11. The side wall of the valve core 3 is provided with a gas passing surface 31, two ends of the gas passing surface 31 are respectively connected with the upper end surface and the lower end surface of the valve core 3, and the gas passing surface 31 is positioned in the gas path channel.

Specifically, the check valve 100 is a cylinder, the guide groove 21 is a circular hole and is coaxially disposed with a central axis of the check valve 100, and the valve element 3 is a cylinder adapted to the guide groove 21. The check valve 100 is provided therein with an air passage passing through the upper and lower end surfaces, and the air passage passes through the guide groove 21, i.e., the valve element 3 adapted to the guide groove 21 is located in the air passage. When the air current flows in from the end of the valve cover 1 provided with the air inlet hole 11, the air current pushes the valve core 3 to move towards the direction far away from the air inlet hole 11, the valve core 3 opens the air inlet hole 11, and the air current flows in from the air inlet hole 11 and flows out from the air outlet hole 22 after passing through the air channel. When the air flow flows in from the end of the valve seat 2 provided with the air outlet hole 22, the air flow pushes the valve core 3 to move towards the direction close to the air inlet hole 11, the valve core 3 blocks the air inlet hole 11, and the air flow flowing in from the air outlet hole 22 cannot flow out from the air inlet hole 11. The air flow pushes the valve core 3 to enable the valve core 3 to block or open the air inlet hole 11, and the effect that the air can only be transmitted in one direction is achieved.

Further, the valve core 3 is in clearance fit with the guide groove 21 so that the valve core 3 can be movably mounted in the guide groove 21. The gap between the valve core 3 and the guide groove 21 forms a part of an air passage, and after the air flowing in from the air inlet hole 11 pushes the valve core 3 to move towards the direction far away from the air inlet hole 11, the flowing air passes through the gap between the valve core 3 and the guide groove 21 and finally flows out from the air outlet hole 22, so that the air inlet process is completed.

Further, the side wall of the valve core 3 is provided with a gas passing surface 31 penetrating through the upper and lower end surfaces of the valve core 3, which is equivalent to a notch arranged on the valve core 3 for providing a space for allowing the gas flow to pass through. In the present embodiment, the air flow can pass through not only the gap between the valve body 3 and the guide groove 21, but also the gap formed by the air passing surface 31, thereby improving the efficiency of air flow passing. In order to adapt to various occasions and meet various actual requirements, the size and the number of the air passing surfaces 31 can be adjusted. In some possible embodiments, the valve core 3 may further include an air passing hole communicating the upper and lower ends of the valve core 3 to replace the air passing surface 31.

The check valve 100 further includes a spring 4, one end of the spring 4 is connected to the valve seat 2, and the other end is connected to the valve element 3, and the valve element 3 can move in the guide groove 21 in a direction of compressing or releasing the spring 4.

Specifically, the spring 4 is used for providing power for resetting the valve core 3, the spring 4 is installed in the guide groove 21 along the extending direction of the guide groove 21, and one end of the spring 4 abuts against one end of the valve core 3 far away from the air inlet hole 11. In the initial state, the spring 4 is in a slightly compressed state, and the valve core 3 is tightly abutted against the inner wall of one end of the valve cover 1, which is provided with the air inlet 11, under the action of the elastic force of the spring 4, so that the air inlet 11 is sealed. When air flows in from one end of the valve cover 1 provided with the air inlet hole 11, the air flow pushes the valve core 3 to move towards the direction of the compression spring 4, namely the direction far away from the air inlet hole 11, the valve core 3 opens the air inlet hole 11, and the air flow flows out from the air outlet hole 22 after flowing into the air flow channel from the air inlet hole 11. When the gas meets a certain condition, if the air pressure at two ends of the check valve 100 respectively provided with the air inlet 11 and the air outlet 22 is equal, the valve core 3 is pushed to move towards the direction close to the air inlet 11 by the elasticity of the spring 4, the valve core 3 is reset, and the air inlet 11 is blocked by the valve core 3. The valve core 3 is reset through the elasticity of the spring 4, so that the leakage amount of the check valve 100 is effectively reduced, and the practicability of the check valve 100 is enhanced.

One of the purposes of the present application is to design a check valve 100 with separable parts, and it can be understood that the separable structure of the valve cover 1 and the valve seat 2 makes the operation of replacing the valve core 3 or the spring 4 easier when the valve core 3 or the spring 4 is damaged and cannot meet the working requirement. The valve cover 1 and the valve seat 2 can be designed as standard fittings, further improving the practicability of the check valve 100. The valve cover 1, the valve seat 2, the valve core 3 and the spring 4 are independent parts, when a certain part is damaged, the one-way valve 100 can be normally used after the corresponding part is replaced, the whole one-way valve 100 is not scrapped, and the production cost is obviously reduced.

The end surface of the valve core 3 facing the air inlet hole 11 is provided with a guide post 32, and one end of the guide post 32 protrudes out of the air inlet hole 11 and is movably connected to the air inlet hole 11.

In this embodiment, the guiding column 32 is a cylinder, the guiding column 32 is disposed coaxially with the air inlet 11, and the guiding column 32 is movably inserted into the air inlet 11 to position and guide the valve element 3. In some possible embodiments, the guide post 32 is in the shape of a circular truncated cone, and the diameter of the guide post 32 is gradually reduced in a direction away from the valve core 3, that is, an inclined guide surface is formed on the side wall of the guide post 32, so that the assembly of the guide post 32 and the air inlet hole 11 is easy. Furthermore, the diameter of one end of the guide post 32 close to the valve core 3 can be larger than that of the air inlet hole 11, so that the air inlet hole 11 is blocked through the guide post 32, and the sealing effect is realized.

The check valve 100 further includes a first sealing ring 5, a first receiving groove 33 is formed on the valve core 3 or the valve cover 1, and the first sealing ring 5 is located in the first receiving groove 33 and is sleeved on the guide post 32.

In this embodiment, the air inlet 11 is disposed at the top end of the valve cap 1, the air outlet 22 is disposed at the bottom end of the valve seat 2, and when the spring 4 tightly abuts the valve core 3 against the inner wall of the valve cap 1, the valve core 3 and the inner wall of the valve cap 1 abut against the upper and lower end surfaces of the first sealing ring 5 respectively and relatively press the first sealing ring 5. The diameter of first sealing washer 5 is greater than the diameter of inlet port 11, and first sealing washer 5 cup joints in guide post 32, and first sealing washer 5 and inlet port 11 coaxial setting promptly, therefore first sealing washer 5 can seal inlet port 11, further strengthens check valve 100's sealed effect. First sealing washer 5 still acts as the effect of bolster, when reseing to case 3 through spring 4, the first sealing washer 5 one step earlier contacts the inner wall of valve gap 1, and first sealing washer 5 can take place elastic deformation and cushion with case 3 in the movement under the effect of spring 4 elasticity, avoids case 3 and valve gap 1 to bump and causes the damage.

In this embodiment, the end surface of the valve element 3, which is provided with the guide post 32, is partially recessed along the axis in the direction away from the air inlet 11 to form a first receiving groove 33, the first receiving groove 33 is annularly disposed around the guide post 32, and the outer diameter of the first receiving groove 33 is greater than the outer diameter of the first sealing ring 5. It can be understood that the first gasket 5 is elastically deformed when being pressed, and the first receiving groove 33 provides a space for the first gasket 5 to be elastically deformed. In some possible embodiments, the first receiving groove 33 is disposed on the inner wall of the valve cap 1, and the first receiving groove 33 is disposed around the air inlet hole 11 and has an outer diameter larger than that of the first sealing ring 5.

The check valve 100 further includes a second sealing ring 6, a second receiving groove 23 is formed in the valve cover 1 or the valve seat 2, the second receiving groove 23 is disposed around the guide groove 21, and the second sealing ring 6 is located in the second receiving groove 23.

The second sealing ring 6 is used for realizing the sealing of the valve cover 1 and the valve seat 2. It can be understood that the connection mode of the valve cover 1 and the valve seat 2 is detachable, so that no matter in the mode of threaded connection or snap connection, a gap exists between the valve cover 1 and the valve seat 2, thereby affecting the use effect of the check valve 100, and therefore, a sealing element needs to be additionally arranged between the valve cover 1 and the valve seat 2. After the valve cover 1 and the valve seat 2 are assembled, the valve cover 1 and the valve seat 2 are respectively abutted against the second sealing ring 6 and relatively extrude the upper end surface and the lower end surface of the second sealing ring 6, and the second sealing ring 6 is arranged around the guide groove 21, so that the valve cover 1 and the valve seat 2 jointly form a closed cavity, and the sealing effect is enhanced. The second receiving groove 23 functions in the same manner as the first receiving groove 33, and is provided in the valve cover 1 or the valve seat 2.

The first seal ring 5 and the second seal ring 6 are both O-ring seals. It can be understood that, in most cases, the check valve 100 is in a non-operating state, that is, the first seal ring 5 and the second seal ring 6 are both in a static seal state, and the O-ring has good sealing performance, and almost no leakage can be achieved in the static seal state, so the O-ring is used for both the first seal ring 5 and the second seal ring 6.

The valve seat 2 is provided with a mounting surface 24, the mounting surface 24 is positioned in the guide groove 21, the end surface of the valve core 3 far away from the valve cover 1 is provided with a limiting column 34, the spring 4 is sleeved on the limiting column 34, one end of the spring abuts against the valve core 3, and the other end of the spring abuts against the mounting surface 24.

Specifically, to this embodiment, installation face 24 sets up in the inner wall that disk seat 2 just faced the case 3 bottom, and the one end butt of spring 4 is in installation face 24, and the other end butt is in the bottom of case 3, and installation face 24 is on a parallel with the bottom of case 3 for spring 4 only receives axial power, extension spring 4's life. The valve core 3 is also provided with a limiting post 34 for preventing the spring 4 from shaking so as to ensure the action effect of the spring 4 on the valve core 3.

The outer side walls of the valve cover 1 and the valve seat 2 are respectively provided with at least one plane 12, and each plane 12 extends along the axial direction of the valve cover 1 and the valve seat 2. The purpose of the plane 12 is to facilitate assembly, and it can be understood that the check valve 100 is a cylinder, that is, the valve cover 1 and the valve seat 2 are both cylinders, and when the valve cover 1 is assembled with the valve seat 2, the outer surface is a curved surface which is not beneficial to clamping, so that the plane 12 is arranged to clamp the valve cover 1 and the valve seat 2, and the assembly is completed.

The valve seat 2 is provided with a connecting part 25 at one end provided with the air outlet hole 22, and the air outlet hole 22 penetrates through the connecting part 25. Particularly to the embodiment, a connecting portion 25 is convexly arranged at one end of the valve seat 2 away from the valve cover 1, and the connecting portion 25 is coaxially arranged with the air outlet 22. The outer side wall of the connection portion 25 is provided with a screw thread for connection with an external device.

The embodiment also provides a testing device, which comprises the check valve 100 and a driving mechanism, wherein the driving mechanism is connected to one end of the check valve 100, which is provided with the air inlet 11, and can drive the valve element 3 to move in the guide groove 21.

Another object of the present embodiment is to provide a check valve 100 capable of meeting the requirement of low leakage (e.g. leakage less than or equal to 0.0001L/min) under low pressure (e.g. 35kpa) for testing the air tightness of a product by using a testing device. When the pressure is low and the sealing level is high, the flow of air is insufficient to move the valve element 3 against the elastic force of the spring 4, and thus the valve element 3 needs to be pushed away by an external force to open the air inlet hole 11. When air inlet is needed, one end of the driving mechanism abuts against the guide post 32 and pushes the valve core 3 to move towards the direction far away from the air inlet hole 11 so as to open the air inlet hole 11, and air flow flows in from the air inlet hole 11. When the air flow meets the conditions (if the air pressure of the air flow reaches the pressure value set by a customer), the driving mechanism is far away from the guide post 32, the valve core 3 is reset under the action of the elastic force of the spring 4 and blocks the air inlet 11, and air inlet is stopped.

The embodiment provides a check valve 100 with all detachable parts, and the valve cover 1 is detachably connected with the valve seat 2 so as to facilitate the replacement of the parts. And the valve cover 1, the valve seat 2, the valve core 3, the spring 4, the first sealing ring 5 and the second sealing ring 6 are independent parts, when any one is damaged, the corresponding part is replaced, so that the one-way valve 100 can normally work, the whole one-way valve 100 does not need to be replaced, and the production cost is saved. Meanwhile, the inner sealing effect of the check valve 100 depends on the performances of the spring 4 and the sealing ring, so that the spring 4 and the sealing ring with better performances can be correspondingly replaced by the check valve 100 according to actual requirements to adapt to a higher-standard test environment, and the practicability of the check valve 100 is greatly enhanced. The check valve 100 is further provided with a guide post 32 protruding from the air outlet 22, and the driving mechanism pushes the guide post 32 to push the valve element 3 to open the air inlet 11, so that the check valve 100 can still work under the condition of low pressure, and the practicability of the check valve 100 is further enhanced.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (10)

1. A one-way valve is characterized by comprising a valve cover, a valve seat and a valve core, wherein the valve cover is detachably connected with the valve seat, a guide groove is formed in the valve seat, and the valve core is positioned in the guide groove and can move along the guide groove; the check valve is provided with an air passage which penetrates through the valve cover and the valve seat, an air inlet hole is formed at one end of the valve cover, an air outlet hole is formed at one end of the valve seat, and the valve core can block or open the air inlet hole; the side wall of the valve core is provided with a gas passing surface, two ends of the gas passing surface are respectively connected to the upper end surface and the lower end surface of the valve core, and the gas passing surface is positioned in the gas path channel.

2. The check valve as in claim 1, further comprising a spring having one end connected to the valve seat and the other end connected to the valve element, the valve element being movable in the guide groove in a direction to compress or release the spring.

3. The check valve as claimed in claim 1, wherein an end surface of said valve body facing said intake port is provided with a guide post, one end of said guide post protruding from said intake port and movably connected to said intake port.

4. The check valve as claimed in claim 3, wherein the check valve further comprises a first sealing ring, a first receiving groove is formed on the valve core or the valve cover, and the first sealing ring is located in the first receiving groove and sleeved on the guide post.

5. The check valve as in claim 4, further comprising a second sealing ring, wherein a second receiving groove is disposed on the valve cover or the valve seat, the second receiving groove is disposed around the guide groove, and the second sealing ring is disposed in the second receiving groove.

6. The check valve as in claim 5, wherein said first seal and said second seal are both O-rings.

7. The check valve as claimed in claim 2, wherein the valve seat has a mounting surface, the mounting surface is located in the guide groove, the end surface of the valve element away from the air inlet hole is provided with a limiting post, the spring is sleeved on the limiting post, one end of the spring abuts against the valve element, and the other end of the spring abuts against the mounting surface.

8. The one-way valve of claim 1, wherein the outer side walls of the valve cover and the valve seat are respectively provided with at least one flat surface, and each flat surface extends in the axial direction of the valve cover and the valve seat.

9. The check valve as in claim 1, wherein said valve seat has a connecting portion at an end thereof where said air outlet hole is provided, said air outlet hole extending through said connecting portion.

10. A testing apparatus, comprising a check valve according to any one of claims 1 to 9, and a driving mechanism connected to an end of the check valve where the air inlet hole is provided, the driving mechanism being capable of driving the valve element to move in the guide groove.

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