One-way valve

Abstract

The utility model discloses a one-way valve which comprises a valve body, a guide piece, a sealing piece and an elastic piece. A first hole section, a second hole section and a third hole section are sequentially arranged in the valve body in the fluid flowing direction, and the elastic piece is installed in the first hole section in the axial direction of an inner cavity of the through hole and located and connected between the inner end face of the first hole section and the sealing part of the guiding piece. The sealing part of the guide piece seals and blocks the second hole section when the elastic piece is in a non-compressed state, and the fluid inlet of the guide piece is communicated with the first hole section when the elastic piece is in a compressed state. The one-way valve effectively solves the problem of liquid leakage of the one-way valve in the process of dismounting and replacing the connector.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a one-way valve. Background Art

[0002] One-way valves, also known as check valves and non-return valves, are mainly used in hydraulic systems or pneumatic systems to prevent reverse flow. With the rapid development of science and technology, one-way valves are increasingly used in pipelines in various industries to ensure stable production and safe production. Although there are many types of one-way valves, there are always various problems in their use.

[0003] In the prior art, when removing a joint connected to a one-way valve, since the working pipeline connected to the one-way valve has a certain pressure and a certain pressure is also generated when the joint is pulled out, if the one-way valve is not well sealed during the process of removing the joint, leakage will occur, which may cause contamination of the working pipeline or the working system. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a one-way valve, which effectively solves the problem of liquid leakage of the one-way valve during the process of disassembling and replacing the joint of the one-way valve.

[0005] The technical solution of the utility model is:

[0006] A one-way valve comprises a valve body, a guide member and an elastic member, wherein a through hole cavity is formed in the valve body along the axial direction, and the through hole cavity is composed of a first hole segment, a second hole segment and a third hole segment which are sequentially arranged along the flow direction of the fluid;

[0007] The guide member is a hollow columnar structure with one end open and the other end sealed. The open end of the guide member is a fluid outlet and the sealed end is a sealing portion. The inner hollow portion of the guide member forms a flow channel. A plurality of fluid inlets connected to the flow channel are provided on the circumferential side wall of the guide member near the sealing portion.

[0008] The elastic member is axially installed in the first hole segment along the inner cavity of the through hole and is positioned and connected between the inner end surface of the first hole segment and the sealing portion of the guide member;

[0009] The sealing portion of the guide member is sealed at the second hole section when the elastic member is in a non-compressed state, and the fluid inlet of the guide member is communicated with the first hole section when the elastic member is in a compressed state.

[0010] Furthermore, a first annular step surface is convexly provided on the inner wall of the valve body at the outer end of the first hole section, one end of the elastic member abuts against the annular step surface, and the other end of the elastic member is sleeved on the sealing portion.

[0011] Furthermore, a second annular step surface is protruding from the inner wall of the valve body at the junction of the first hole section and the second hole section, and a third annular step surface is protruding from the inner wall of the valve body at the junction of the second hole section and the third hole section, and a sealing member is sealed and embedded between the second annular step surface and the third annular step surface, and the inner diameter surface of the sealing member can fit tightly with the outer wall of the guide member.

[0012] Furthermore, a radial dimension of the third annular step surface is greater than a radial dimension of the second annular step surface.

[0013] Furthermore, the inner diameter side surfaces of the second annular step surface and the third annular step surface are both formed with inclined surfaces that gradually taper from the first hole segment to the third hole segment.

[0014] Furthermore, the outer surface of the cylinder of the guide member from the lower end of the fluid inlet to the upper end of the sealing portion is formed into a gradually expanding trumpet-shaped annular slope surface, and the trumpet-shaped annular slope surface matches the inclined surfaces on the second and third annular step surfaces.

[0015] Furthermore, an annular support platform is formed on the guide member by protruding radially outwards at an upper end adjacent to the fluid inlet, and the annular support platform is located above the third annular step surface when the elastic member is in a non-compressed state.

[0016] Furthermore, a standard male connector is provided on the sealing sleeve on the outer peripheral wall of the guide member in the third hole section of the valve body, and an end surface of one side of the standard male connector abuts against the annular support platform.

[0017] Furthermore, a dust cap is provided on the outer cover of the third hole section of the valve body.

[0018] Furthermore, the guide member is provided with two fluid inlets, and the two fluid inlets are symmetrically distributed along two sides of the central axis of the guide member.

[0019] The beneficial technical effect of the utility model is as follows: the utility model discloses a one-way valve, including: a valve body, a guide member, a sealing member and an elastic member. The valve body is provided with a first hole segment, a second hole segment and a third hole segment in sequence along the direction of fluid flow, and the elastic member is axially installed in the first hole segment along the inner cavity of the through hole and positioned and connected between the inner end surface of the first hole segment and the sealing portion of the guide member. The sealing portion of the guide member is sealed and blocked at the second hole segment when the elastic member is in a non-compressed state, and the fluid inlet of the guide member is connected to the first hole segment when the elastic member is in a compressed state. When the one-way valve is removed and the standard male connector is converted, the one-way valve will not have leakage problems, that is, the one-way valve has good sealing performance during operation, and it also ensures that it has good sealing performance when the connector is removed and converted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the utility model and the dust cap being assembled;

[0021] Figure 2 This is a schematic diagram of the assembly of the utility model and a standard male connector;

[0022] Figure 3 This is a cross-sectional view of the utility model and a standard male connector on the AA plane;

[0023] Figure 4 It is a schematic diagram of the valve body of the utility model;

[0024] Figure 5 This is a cross-sectional view of the valve body of the utility model on the AA surface (this is the normally closed state of the utility model);

[0025] Figure 6 This is a cross-sectional view of the valve body of the utility model from another angle (this is the normally open state of the utility model);

[0026] Figure 7 It is a schematic diagram of a guide member of the utility model. DETAILED DESCRIPTION

[0027] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0028] like Figure 1-Figure 7 As shown, the utility model provides a one-way valve, including a valve body 1, a guide member 2, a sealing member 3, and an elastic member 4. The valve body 1 is a cylindrical structure, and a through hole cavity is formed inside the valve body 1 along the axial direction. The through hole cavity is sequentially provided with a first hole section 11, a second hole section 12, and a third hole section 13 along the fluid flow direction. The lower port of the first hole section 11 is a fluid inlet, and the upper port of the third hole section 13 is a fluid outlet. The aperture of the third hole section 13 is suitable for a standard male connector 5. The standard male connector 5 can be inserted and pulled out of the third hole section 13. The first hole section 11, the second hole section 12, the third hole section 13, and the standard male connector plugged into the third hole section 13 form a passage.

[0029] A first annular step surface 111 is provided on the inner wall of the valve body at the outer end of the first hole section 11. A second annular step surface 121 is provided on the inner wall of the valve body 1 at the junction of the first hole section 11 and the second hole section 12, and a third annular step surface 131 is provided on the inner wall of the valve body 1 at the junction of the second hole section 12 and the third hole section 13.

[0030] In addition, the radial dimension of the third annular step surface 131 is greater than the radial dimension of the second annular step surface 121 , and the inner diameter side surfaces of the second annular step surface 121 and the third annular step surface 131 are both formed with an inclined surface that gradually tapers from the first hole segment to the third hole segment.

[0031] The elastic member 4 is installed in the first hole section 11 along the axial direction of the inner cavity of the through hole and is positioned and connected between the inner end surface of the first hole end and the sealing portion of the guide member 2. The bottom of the elastic member 4 is placed on the annular support platform 111, and the other end of the elastic member 4 is sleeved on the sealing portion 24 of the guide member 2. In the utility model, the elastic member 4 is a spring. If the performance of the one-way valve needs to be changed, for example, when the opening pressure of the one-way valve needs to be reduced or increased, it is only necessary to replace the elastic member 4 with a different elastic coefficient to complete the performance change of the one-way valve.

[0032] The guide member 2 is a hollow columnar structure with one end open and the other end sealed. The open end of the guide member 2 is a fluid outlet 22 and the sealed end is a sealing portion 24. The inner hollow of the guide member 2 forms a flow channel. Two fluid inlets 21 connected to the flow channel are provided on the circumferential side wall of the guide member near the sealing portion 24. The two fluid inlets 21 are symmetrically distributed along the central axis of the guide member 2. The bottom end of the sealing portion 24 is sleeved in the upper end of the spring member 4, and the sealing portion 24 of the guide member 2 is sealed and blocked at the second hole section when the elastic member 4 is in a non-compressed state. The two fluid inlets 21 of the guide member 2 are connected to the first hole section 11 when the elastic member 4 is in a compressed state. The outer port of the fluid outlet 22 of the guide member 2 is located in the third hole end.

[0033] The guide member 2 is slidably placed in the first hole segment 11, the second hole segment 12 and the third hole segment 13 under the action of external force. When the guide member 2 is moved from the third hole segment 13 to the first hole segment 11 under the action of external force, the elastic member 4 connected thereto is synchronously compressed. When the external force acting on the guide member 2 disappears, the compressed elastic member 4 uses the rebound force to synchronously bring the guide member 2 to perform a reset movement along the original route.

[0034] The sealing member 3 is filled and placed between the second annular step surface 121 and the third annular step surface 131 , and the inner diameter surface of the sealing member 3 can be tightly fitted with the outer wall of the guide member 2 to achieve a sealing effect.

[0035] When the elastic member 4 is in a non-compressed state, the fluid inlet 21 of the guide member 2 is located above the sealing member 3. At this time, the one-way valve of the utility model is in a normally closed state.

[0036] In addition, an annular support platform 23 is provided on the column surface between the upper end of the fluid inlet 21 and the lower end of the fluid outlet 22. When the standard male connector 5 is inserted into the third hole section 13, the fluid outlet 22 of the guide member 2 is sleeved in the standard male connector 5 and coaxial with the standard male connector 5. The main body of the standard male connector 5 is placed between the inner wall of the valve body 1 and the outer wall of the guide member 2. The interference fit between the standard male connector 5 and the guide member 2 is within the applicable range. The bottom of the standard male connector 5 is just placed on the annular support platform 23. Therefore, when the standard male connector 5 is pressed downward, the guide member 2 simultaneously compresses the elastic member 4 and slides toward the first aperture 11.

[0037] In addition, the outer surface of the cylinder between the lower ends of the two fluid inlets 21 and the upper end of the sealing part 24 is formed into a gradually expanding trumpet-shaped annular slope surface, and the trumpet-shaped annular slope surface matches the slopes on the second and third annular step surfaces. On the one hand, the upper end of the elastic member 4 is sleeved on the trumpet-shaped annular slope surface to enhance the connectivity between the elastic member 4 and the guide member 2, thereby ensuring that the guide member 2 moves in a predetermined direction during movement to avoid deviation, thereby accurately controlling the position of the fluid inlet 21 and improving the sealing performance of the one-way valve; on the other hand, when the elastic member 4 is in a non-compressed state, when the fluid inlet 21 of the guide member 2 is located above the sealing member 3, the sealing member is just located and tightly fitted on the trumpet-shaped slope surface, and this slope design increases the contact area with the sealing member 3, further ensuring the sealing performance of the valve body.

[0038] In addition, a dust cap 6 is disposed outside the third hole section 13 to prevent the one-way valve from being contaminated by debris.

[0039] The working principle and operation process of the utility model are as follows: when the standard male connector 5 placed on the annular support platform 23 is pressed downward, the guide member 2 is subjected to downward pressure to compress the elastic member 4 to slide in the direction of the first aperture 11. When the upper edge of the annular support platform 23 moves to the lower edge of the third annular step surface 121, the bottom of the standard male connector 5 just touches the third annular step surface. At this time, the downward pressing movement of the standard male connector 5 stops, and the annular support platform 23 is clamped to the lower edge of the third annular step surface 131 along the oblique side surface of the third annular step surface 131, and the guide member 2 stops running immediately. At this time, the fluid inlet 21 is just placed below the sealing member 3, and the fluid flowing in from the lower port of the first hole section 11 of the valve body enters the fluid inlet 21, flows through the fluid outlet 22, reaches the outlet of the standard male connector 5 until it enters the working pipeline. At this time, the one-way valve of the utility model is in a normally open state.

[0040] When the one-way valve in the normally open state needs to be closed, the extrusion portion of the standard male connector 5 is squeezed and pulled upward. When the extrusion portion of the standard male connector 5 is squeezed, the inner wall of the standard male connector 5 clamps the outer wall in contact with the guide member 2, thereby driving the guide member 2 to move upward synchronously. At this time, the annular support platform 23 slides out from the lower edge of the third annular step surface 131 and resets upward, and the elastic member 4 also rebounds upward and resets. The fluid inlet 21 is just above the sealing member 3, and the fluid is isolated from the outside of the sealing member 3. At this time, the utility model is in the normally closed state.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A one-way valve, characterized in that: The valve body (1) comprises a valve body (1), a guide member (2) and an elastic member (4); a through hole cavity is formed in the axial direction inside the valve body (1); the through hole cavity is composed of a first hole section (11), a second hole section (12) and a third hole section (13) which are arranged in sequence along the flow direction of the fluid and are connected to each other; The guide member (2) is a hollow columnar structure with one end open and the other end sealed, the open end of the guide member being a fluid outlet (22) and the sealed end being a sealing portion (24), a flow channel being formed in the hollow portion inside the guide member, and a plurality of fluid inlets (21) communicating with the flow channel being provided on the circumferential side wall of the guide member close to the sealing portion; The elastic member (4) is axially installed in the first hole section (11) along the inner cavity of the through hole and is positioned and connected between the inner end surface of the first hole section and the sealing portion of the guide member (2); The sealing portion (24) of the guide member (2) is sealed at the second hole section when the elastic member (4) is in a non-compressed state, and the fluid inlet (21) of the guide member (2) is connected to the first hole section (11) when the elastic member (4) is in a compressed state.

2. The one-way valve according to claim 1, characterized in that A first annular step surface (111) is convexly provided on the inner wall of the valve body at the outer end of the first hole section (11), one end of the elastic member (4) abuts against the annular step surface (111), and the other end of the elastic member is sleeved on the sealing portion (24).

3. The one-way valve according to claim 1, characterized in that A second annular step surface (121) is protrudingly provided on the inner wall of the valve body (1) at the junction of the first hole section (11) and the second hole section (12), and a third annular step surface (131) is protrudingly provided on the inner wall of the valve body at the junction of the second hole section (12) and the third hole section (13), and a sealing member (3) is sealedly embedded between the second annular step surface (121) and the third annular step surface (131), and the inner diameter surface of the sealing member (3) can be tightly fitted with the outer wall of the guide member (2).

4. The one-way valve according to claim 3, characterized in that :The radial dimension of the third annular step surface (131) is greater than the radial dimension of the second annular step surface (121).

5. The one-way valve according to claim 3, characterized in that The inner diameter side surfaces of the second annular step surface (121) and the third annular step surface (131) are both formed with inclined surfaces that gradually taper from the first hole segment to the third hole segment.

6. The one-way valve according to claim 5, characterized in that: The outer surface of the cylindrical body of the guide member (2) from the lower end of the fluid inlet (21) to the upper end of the sealing portion (24) is formed into a gradually expanding trumpet-shaped annular slope surface, and the trumpet-shaped annular slope surface matches the inclined surfaces on the second and third annular step surfaces.

7. The one-way valve according to claim 3, characterized in that: An annular support platform (23) is formed on the guide member (2) at the upper end adjacent to the fluid inlet (21) and protrudes radially outward. When the elastic member (4) is in a non-compressed state, the annular support platform (23) is located above the third annular step surface (131).

8. The one-way valve according to claim 7, characterized in that: A standard male connector (5) is provided on the sealing sleeve on the outer peripheral wall of the guide member (2) in the third hole section (13) of the valve body (1), and the end surface of one side of the standard male connector (5) abuts against the annular support platform (23).

9. The one-way valve according to claim 1, characterized in that: The third hole section (13) of the valve body (1) is provided with a dust cap (6) on its outer cover.

10. The one-way valve according to claim 1, characterized in that: The guide member (2) is provided with two fluid inlets (21), and the two fluid inlets (21) are symmetrically distributed along the two sides of the central axis of the guide member (2).

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