Check valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a check valve which comprises a valve body, a water inlet and a water outlet are formed in the two sides of the valve body, and a check cavity is formed in the valve body. The first non-return mechanism is arranged in the non-return cavity and is positioned on one side close to the water inlet; the second non-return mechanism is arranged in the non-return cavity and located on the side close to the water outlet; wherein the water inlet and the water outlet are both communicated with the check cavity, compared with the prior art, the check valve has the advantages that the sealing performance of the check valve is improved, and the phenomenon of trace leakage in the using process of the check valve is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a check valve. Background Art

[0002] A check valve, also known as a non-return valve or a reflux valve, is a valve that prevents the reverse flow of fluid in a pipeline. Its main function is to allow the fluid to flow freely in one direction and prevent the fluid from flowing in the reverse direction. This valve plays an important role in controlling and protecting liquid or gas fluid systems, preventing problems that may be caused by the reverse flow of fluid. The check valves used in existing pipelines are generally of spring type or orifice plug diaphragm type structures. They require a relatively large fluid pressure to conduct during use and are not applicable to some occasions with relatively low fluid pressures. In addition, the check valve is prone to minor leakage problems and has poor sealing performance. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a check valve for solving the above-mentioned existing technical problems, so as to reduce the fluid pressure required for the check valve to conduct and improve the sealing performance of the check valve.

[0004] In view of this, the utility model provides a check valve, comprising:

[0005] A valve body, with a water inlet and a water outlet provided on both sides of the valve body, and a check cavity is arranged inside the valve body;

[0006] Further comprising:

[0007] A first check mechanism, which is arranged in the check cavity and is located on the side close to the water inlet;

[0008] A second check mechanism, which is arranged in the check cavity and is located on the side close to the water outlet;

[0009] Wherein, both the water inlet and the water outlet are communicated with the check cavity.

[0010] In this technical solution, during the use of the check valve, the fluid can enter the check cavity from the water inlet and flow out from the water outlet. The first check mechanism and the second check mechanism in the check cavity can form two check seals in the check cavity, thereby improving the sealing performance of the check valve and preventing minor leakage of the check valve during use.

[0011] In the above technical solution, further, the first check mechanism further comprises:

[0012] A rod, which is fixedly arranged in the check cavity;

[0013] Sealing piece, the sealing piece is an elastic piece, the sealing piece is arranged on the rod, there may be several sealing pieces and they are evenly spaced along the axial direction of the rod;

[0014] Sealing ring, the sealing ring includes an outer ring and an inner ring that are concentrically distributed;

[0015] Wherein, the sealing ring is arranged in the check cavity, and the sealing piece can cooperate with the sealing ring to form a check seal.

[0016] In the above technical solution, further, the sealing piece further includes:

[0017] Inner piece, the inner piece is arranged on the rod;

[0018] Outer piece, the outer piece is arranged on the outer edge of the inner piece;

[0019] Wherein, the thickness of the inner piece is greater than that of the outer piece, and the flexibility of the inner piece is less than that of the outer piece.

[0020] In the above technical solution, further, the second check mechanism further includes:

[0021] Valve seat, the valve seat is arranged in the check cavity;

[0022] Flap valve, the flap valve is rotatably arranged on the side of the valve seat close to the water outlet;

[0023] Rubber ring, the rubber ring is arranged on the surface of the flap valve where it cooperates with the valve seat.

[0024] In the above technical solution, further, a deformation groove is arranged on the side surface of the rubber ring.

[0025] In the above technical solution, further, a fiber layer is arranged in the inner piece.

[0026] The beneficial effects of the present utility model are:

[0027] 1. By setting the first check mechanism and the second check mechanism, the sealing performance of the check valve is improved, and the phenomenon of slight leakage of the check valve during use is prevented;

[0028] 2. By setting the sealing piece, the conduction of the check valve is facilitated, and the sealing performance of the check valve is ensured;

[0029] 3. By setting the deformation groove, when the flap valve is pressed and closed, the rubber ring can provide a shock-absorbing effect for movement, thereby reducing the influence of the water hammer effect on the flap valve. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the specific implementation manner of the present invention.

[0032] Figure 2 It is a schematic cross-sectional view structure diagram of the present invention.

[0033] Figure 3 It is a schematic structural diagram of the first check mechanism of the present invention.

[0034] Figure 4 It is a schematic structural diagram of the sealing piece of the present invention.

[0035] Figure 5 It is a schematic structural diagram of the second check mechanism of the present invention.

[0036] The markings in the figure are shown as:

[0037] 1. Valve body; 100. Water inlet; 101. Water outlet; 2. Check cavity; 3. First check mechanism; 30. Rod; 31. Sealing piece; 310. Inner piece; 311. Outer piece; 32. Sealing ring; 320. Outer ring; 321. Inner ring; 4. Second check mechanism; 40. Valve seat; 41. Valve flap; 42. Rubber ring; 5. Deformation groove; 6. Fiber layer. Specific implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] Embodiment 1:

[0041] An embodiment of the present application provides a check valve, including: a valve body 1, an inlet 100 and an outlet 101 are provided on both sides of the valve body 1, and a check cavity 2 is provided inside the valve body 1;

[0042] It further includes: a first check mechanism 3, the first check mechanism 3 is arranged in the check cavity 2 and is located on the side close to the inlet 100; a second check mechanism 4, the second check mechanism 4 is arranged in the check cavity 2 and is located on the side close to the outlet 101;

[0043] Wherein, both the inlet 100 and the outlet 101 are communicated with the check cavity 2.

[0044] In this embodiment, during the use of the check valve, the fluid can enter the check cavity 2 from the inlet 100 and flow out from the outlet 101. The first check mechanism 3 and the second check mechanism 4 in the check cavity 2 can form two check seals in the check cavity 2, thereby improving the sealing performance of the check valve and preventing the phenomenon of slight leakage during the use of the check valve.

[0045] Embodiment 2:

[0046] This embodiment provides a check valve. In addition to including the technical solutions of the above embodiment, it further has the following technical features. The first check mechanism 3 further includes: a rod 30, the rod 30 is fixedly arranged in the check cavity 2; a sealing piece 31, the sealing piece 31 is an elastic piece, the sealing piece 31 is arranged on the rod 30, and there may be several sealing pieces 31 and they are evenly spaced along the axial direction of the rod 30; a sealing ring 32, the sealing ring 32 includes a concentrically distributed outer ring 320 and an inner ring 321;

[0047] Wherein, the sealing ring 32 is arranged in the check cavity 2, and the sealing piece 31 can cooperate with the sealing ring 32 to form a check seal.

[0048] The sealing sheet 31 further includes: an inner sheet 310, which is disposed on the rod 30; an outer sheet 311, which is disposed on the outer edge of the inner sheet 310;

[0049] The thickness of the inner sheet 310 is greater than that of the outer sheet 311 , and the flexibility of the inner sheet 310 is less than that of the outer sheet 311 .

[0050] Moreover, the rod 30 can be fixedly installed in the check chamber 2 in a conventional manner, such as installing two cross-shaped frames in the check chamber 2, and the two ends of the rod 30 are respectively connected to the centers of the two frames, and the sealing sheet 31 is integrally formed with the rod 30. The sealing sheet 31 is disc-shaped, and the inner sheet 310 of the sealing sheet 31 cooperates with the inner ring 321 of the sealing ring 32, and the outer sheet 311 of the sealing sheet 31 cooperates with the outer ring 320 of the sealing ring 32. The sealing sheet 31 can also be pre-set to be umbrella-shaped, and the sealing ring 32 is concentrically arranged with the valve body 1. The sealing ring 32 has an annular mounting portion, and the outer ring 320 and the inner ring 321 are mounted on the mounting portion. The sealing ring 32 has a plurality of corresponding sealing sheets 31.

[0051] In this embodiment, when the check valve is in use, the fluid can enter the check chamber 2 from the water inlet 100 and flow out from the water outlet 101. After the fluid enters the check chamber 2 from the water inlet 100, the sealing sheet 31 is squeezed by the fluid pressure and thus contacts and cooperates with the sealing ring 32. The fluid can flow out from the gap between the sealing sheet 31 and the sealing ring 32. The check seal performed by the sealing sheet 31 and the sealing ring 32 can facilitate the opening of the check valve when the fluid pressure is low. The outer sheet 311 and the inner sheet 310 can be arranged on a sealing sheet 31. Two seals are formed. At the same time, the thickness of the inner sheet 310 is greater than the outer sheet 311, and the flexibility of the inner sheet 310 is less than the flexibility of the outer sheet 311, which can further facilitate the conduction of the check valve when the fluid pressure is low. Through a plurality of sealing sheets 31 and evenly spaced distribution along the axial direction of the rod 30, multiple seals can be further formed in the axial direction, thereby improving the sealing performance of the check valve and preventing the check valve from leaking a small amount during use. After the fluid stops flowing, the sealing sheet 31 is affected by the pressure of the reflux fluid and closely cooperates with the sealing ring 32 to form a check seal.

[0052] Embodiment 3:

[0053] This embodiment provides a check valve, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: a fiber layer 6 is provided in the inner sheet 310 .

[0054] In this embodiment, the fiber layer 6 in the inner sheet 310 can improve the strength and fatigue resistance of the inner sheet 310 , thereby increasing the service life of the inner sheet 310 .

[0055] Embodiment 4:

[0056] This embodiment provides a check valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The second check mechanism 4 further includes: a valve seat 40 disposed in the check cavity 2; a valve flap 41 rotatably disposed on one side of the valve seat 40 close to the water outlet 101; and a rubber ring 42 disposed on the surface of the valve flap 41 that cooperates with the valve seat 40.

[0057] A deformation groove 5 is provided on the side surface of the rubber ring 42.

[0058] In this embodiment, during the use of the check valve, the fluid can enter the check cavity 2 from the water inlet 100 and flow out from the water outlet 101. After the fluid enters the check cavity 2 from the water inlet 100, the sealing piece 31 is squeezed by the fluid pressure and thus contacts and cooperates with the sealing ring 32. The fluid can flow out through the gap between the sealing piece 31 and the sealing ring 32. Then, as the fluid flows, the valve flap 41 is pushed open by the fluid pressure, thereby conducting the check valve. By the mutual cooperation of the second check mechanism 4 and the first check mechanism 3, the sealing performance of the check valve is improved, and the phenomenon of slight leakage during the use of the check valve is prevented. After the fluid stops flowing, the valve flap 41 is affected by the pressure of the reflux fluid and cooperates with the valve seat 40, thereby re-forming a check seal. The deformation groove 5 on the rubber ring 42 can reduce the impact generated by the water hammer effect on the valve flap 41 and the valve seat 40 when the valve flap 41 re-cooperates with the valve seat 40, thereby preventing the valve flap 41 and the valve seat 40 from being damaged and improving the service life of the second check mechanism 4.

[0059] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A check valve, comprising: A valve body (1), wherein a water inlet (100) and a water outlet (101) are provided on both sides of the valve body (1), and a check chamber (2) is provided inside the valve body (1); It is characterized by further comprising: A first non-return mechanism (3), the first non-return mechanism (3) being arranged in the non-return chamber (2) and located on a side close to the water inlet (100); a second non-return mechanism (4), the second non-return mechanism (4) being arranged in the non-return chamber (2) and located on a side close to the water outlet (101); Wherein, the water inlet (100) and the water outlet (101) are both in communication with the check chamber (2); The first non-return mechanism (3) further comprises: A rod (30), wherein the rod (30) is fixedly disposed in the non-return chamber (2); A sealing sheet (31), the sealing sheet (31) being an elastic sheet, the sealing sheet (31) being arranged on the rod (30), and the sealing sheet (31) may comprise a plurality of sheets which are evenly spaced and distributed along the axial direction of the rod (30); A sealing ring (32), the sealing ring (32) comprising an outer ring (320) and an inner ring (321) which are concentrically arranged; The sealing ring (32) is arranged in the non-return cavity (2), and the sealing sheet (31) can cooperate with the sealing ring (32) to form a non-return seal.

2. A check valve according to claim 1, characterized in that: The sealing sheet (31) further comprises: An inner sheet (310), wherein the inner sheet (310) is disposed on the rod (30); An outer sheet (311), wherein the outer sheet (311) is arranged on the outer edge of the inner sheet (310); The thickness of the inner sheet (310) is greater than that of the outer sheet (311), and the flexibility of the inner sheet (310) is less than that of the outer sheet (311).

3. A check valve according to claim 2, characterized in that: The second non-return mechanism (4) further comprises: A valve seat (40), wherein the valve seat (40) is arranged in the check chamber (2); A valve flap (41), wherein the valve flap (41) is rotatably disposed on a side of the valve seat (40) close to the water outlet (101); A rubber ring (42) is arranged on a surface of one side of the valve flap (41) that cooperates with the valve seat (40).

4. A check valve according to claim 3, characterized in that: A deformation groove (5) is provided on the side surface of the rubber ring (42).

5. A check valve according to claim 2, characterized in that: A fiber layer (6) is provided in the inner sheet (310).

Images