A swing check valve for preventing fluid leakage

Abstract

The utility model provides a swing check valve for preventing fluid leakage, comprising a valve body, wherein: a valve disc is rotatably installed inside the valve body, and a valve seat corresponding to the valve disc is fixedly installed inside the inlet of the valve body, and a valve cover is detachably fixedly installed on the top of the valve body; a sealing gasket and an inner sealing gasket are detachably fixedly installed between the valve cover and the valve body; with the overall arrangement of the utility model, during use, the greater the pressure of the medium flowing into the valve body, the tighter the inner sealing gasket and the lower sealing cavity are, the better the sealing is, thereby preventing fluid leakage, making the overall structure safer and more reliable.

Description

Technical Field

[0001] The utility model belongs to the field of check valves, and in particular to a swing check valve that prevents fluid leakage. Background Art

[0002] The swing check valve is also called a non-return valve. Its function is to prevent the medium in the pipeline from flowing back. The opening and closing parts are opened or closed automatically by the flow and force of the medium to prevent the medium from flowing back. The check valve belongs to the automatic valve category and is mainly used in pipelines where the medium flows in one direction. It only allows the medium to flow in one direction to prevent accidents.

[0003] However, during the use of the existing swing check valve, the medium is easy to leak from the valve cover, which is prone to safety hazards.

[0004] Therefore, it is very necessary to invent a swing check valve that prevents fluid from leaking. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a technical solution adopted by a swing check valve for preventing fluid leakage: a swing check valve for preventing fluid leakage, comprising a valve body, wherein: a valve disc is rotatably installed inside the valve body, and a valve seat corresponding to the valve disc is fixedly installed inside the inlet of the valve body, and a valve cover is detachably fixedly installed on the top of the valve body; a sealing gasket and an inner sealing gasket are detachably fixedly installed between the valve cover and the valve body.

[0006] Preferably, an upper sealing chamber and a lower sealing chamber are provided at the opening where the valve body and the valve cover are connected, and the lower sealing chamber is located below the upper sealing chamber; the sealing gasket is extruded and fixedly installed in the upper sealing chamber; the inner sealing gasket is extruded and fixedly installed in the lower sealing chamber; the inner diameters of the upper sealing chamber and the lower sealing chamber are larger than the inner diameter of the opening; the diameter of the sealing gasket is consistent with the inner diameter of the upper sealing chamber; the diameter of the inner sealing gasket is consistent with the inner diameter of the lower sealing chamber.

[0007] Preferably, an extrusion platform is fixedly installed on the bottom surface of the valve cover, and an external thread platform is fixedly installed on the bottom surface of the extrusion platform, and the diameter of the extrusion platform is larger than the diameter of the external thread platform; the sealing gasket is sleeved on the external thread platform, and the diameter of the sealing gasket is the same as the diameter of the extrusion platform; the inner sealing gasket is detachably fixedly installed on the external thread platform; the extrusion platform is in the upper sealing cavity; the external thread platform is between the upper sealing cavity and the lower sealing cavity.

[0008] Preferably, an internal thread rubber ring is fixedly mounted on the inner sealing gasket, and the inner sealing gasket is detachably fixedly connected to the external thread platform via the internal thread rubber ring; the diameter of the internal thread rubber ring is consistent with the inner diameter of the opening.

[0009] Compared with the prior art, the advantages of the utility model are:

[0010] The overall arrangement of the utility model, during use, the greater the pressure of the medium flowing into the valve body, the tighter the inner sealing gasket and the lower sealing cavity are, the better the sealing is, thereby preventing fluid leakage and making the overall safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall half-section structure of the utility model.

[0012] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0013] In the figure:

[0014] Valve body 1, valve disc 2, valve seat 3, valve cover 4, extrusion platform 41, external thread platform 42, sealing gasket 5, internal sealing gasket 6, internal thread rubber ring 61, upper sealing chamber 7, lower sealing chamber 8. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0016] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Example

[0019] Reference Figure 1-2 A swing check valve for preventing fluid leakage comprises a valve body 1, wherein: a valve disc 2 is rotatably mounted inside the valve body 1, and a valve seat 3 corresponding to the valve disc 2 is fixedly mounted inside the inlet of the valve body 1, and a valve cover 4 is detachably fixedly mounted above the valve body 1; a sealing gasket 5 and an inner sealing gasket 6 are detachably fixedly mounted between the valve cover 4 and the valve body 1, so as to perform double sealing on the connection between the valve cover 4 and the valve body 1 to prevent fluid leakage.

[0020] An upper sealing chamber 7 and a lower sealing chamber 8 are provided at the opening where the valve body 1 is connected to the valve cover 4, and the lower sealing chamber 8 is located below the upper sealing chamber 7 to provide installation space for the sealing gasket 5 and the inner sealing gasket 6; the sealing gasket 5 is extruded and fixedly installed in the upper sealing chamber 7; the inner sealing gasket 6 is extruded and fixedly installed in the lower sealing chamber 8. After the fluid enters the valve body 1, the greater the pressure of the fluid, the greater the pressure acting on the inner sealing gasket 6, and the tighter the inner sealing gasket 6 and the lower sealing chamber 8 are, thereby preventing fluid leakage; the inner diameters of the upper sealing chamber 7 and the lower sealing chamber 8 are larger than the inner diameter of the opening; the diameter of the sealing gasket 5 is consistent with the inner diameter of the upper sealing chamber 7; the diameter of the inner sealing gasket 6 is consistent with the inner diameter of the lower sealing chamber 8.

[0021] An extrusion platform 41 is fixedly installed on the bottom surface of the valve cover 4 to extrude the sealing gasket 5 to ensure the tightness between the sealing gasket 5 and the upper sealing cavity 7, and an external threaded platform 42 is fixedly installed on the bottom surface of the extrusion platform 41 to facilitate separate disassembly and assembly with the inner sealing gasket 6. The diameter of the extrusion platform 41 is larger than the diameter of the external threaded platform 42; the sealing gasket 5 is sleeved on the external threaded platform 42, and the diameter of the sealing gasket 5 is the same as the diameter of the extrusion platform 41; the inner sealing gasket 6 is detachably fixedly installed on the external threaded platform 42; the extrusion platform 41 is in the upper sealing cavity 7; the external threaded platform 42 is between the upper sealing cavity 7 and the lower sealing cavity 8.

[0022] An internal threaded rubber ring 61 is fixedly installed on the inner sealing gasket 6, so that the inner sealing gasket 6 can be disassembled and replaced separately at a later time, while ensuring the stability between the inner sealing gasket 6 and the valve cover 4. When the valve cover 4 is disassembled and assembled, the inner sealing gasket 6 can be prevented from falling into the valve body 1, and the inner sealing gasket 6 is detachably fixedly connected to the external threaded platform 42 through the internal threaded rubber ring 61; the diameter of the internal threaded rubber ring 61 is consistent with the inner diameter of the opening.

[0023] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A swing check valve for preventing fluid leakage, characterized in that: The invention comprises a valve body (1), wherein: a valve flap (2) is rotatably mounted inside the valve body (1), and a valve seat (3) corresponding to the valve flap (2) is fixedly mounted inside the inlet of the valve body (1); a valve cover (4) is detachably fixedly mounted above the valve body (1); and a sealing gasket (5) and an inner sealing gasket (6) are detachably fixedly mounted between the valve cover (4) and the valve body (1).

2. A swing check valve for preventing fluid leakage as claimed in claim 1, characterized in that: An upper sealing chamber (7) and a lower sealing chamber (8) are provided at the opening where the valve body (1) and the valve cover (4) are connected, and the lower sealing chamber (8) is located below the upper sealing chamber (7); the sealing gasket (5) is extruded and fixedly installed in the upper sealing chamber (7); and the inner sealing gasket (6) is extruded and fixedly installed in the lower sealing chamber (8).

3. A swing check valve for preventing fluid leakage as claimed in claim 2, characterized in that: The bottom surface of the valve cover (4) is fixedly mounted with an extrusion platform (41), and the bottom surface of the extrusion platform (41) is fixedly mounted with an external thread platform (42); the sealing gasket (5) is sleeved on the external thread platform (42); the inner sealing gasket (6) is detachably fixedly mounted on the external thread platform (42); the extrusion platform (41) is located in the upper sealing cavity (7); and the external thread platform (42) is located between the upper sealing cavity (7) and the lower sealing cavity (8).

4. A swing check valve for preventing fluid leakage as claimed in claim 3, characterized in that: An internal thread rubber ring (61) is fixedly mounted on the internal sealing gasket (6), and the internal sealing gasket (6) is detachably fixedly connected to the external thread platform (42) via the internal thread rubber ring (61).

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