Wafer type check valve

Abstract

The utility model belongs to the technical field of check valves, and particularly relates to a wafer type check valve which comprises a valve body, an air inlet and an air outlet are formed in the two ends of the valve body respectively, a valve cover is inserted in the air inlet of the valve body in a threaded mode, a valve rod is inserted in the middle of the valve cover in a sliding mode, and the end, away from the valve cover, of the valve rod is connected with the inner wall of the valve body in a sliding mode. A valve clack is fixedly connected to the valve rod in a sleeved mode, a spring is arranged on the valve rod in a sleeved mode, and the two ends of the spring abut against the valve clack and the inner wall of the valve body respectively. Due to the arrangement of the double-guide valve rod structure, the stability of movement of the valve clack can be effectively guaranteed, media can flow stably, noise is reduced, and therefore the using effect of the check valve is effectively improved.

Description

Technical Field

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

[0002] A check valve is a valve with a circular disc as its opening and closing element. It operates by its own weight and the pressure of the medium to prevent the backflow of the medium. It is an automatic valve and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The disc movement is categorized as lift and swing. A lift check valve is similar in structure to a globe valve, lacking only the stem that drives the disc. The medium enters the valve from the inlet (a swing check valve has an inclined disc that can rotate about its axis, and its operating principle is similar to that of a lift check valve). Check valves are often used as bottom valves in pumping systems to prevent the backflow of water.

[0003] However, the existing check valve has a relatively simple structure, the valve disc of the check valve has poor stability, and causes the flow of the medium to be unstable, thereby affecting the use effect of the check valve. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the valve flap of the check valve proposed in the above background technology has poor stability and causes unstable medium flow, and to propose a wafer-type check valve.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A wafer-type check valve comprises a valve body, wherein an air inlet and an air outlet are respectively provided at both ends of the valve body, a valve cover is threadedly inserted into the air inlet of the valve body, a valve stem is slidably inserted into the middle of the valve cover, an end of the valve stem away from the valve cover is slidably connected to the inner wall of the valve body, a valve disc is fixedly sleeved on the valve stem, a spring is sleeved on the valve stem, and the two ends of the spring are respectively pressed against the valve disc and the inner wall of the valve body.

[0007] Preferably, an O-ring is fixedly sleeved on the valve cover, and the outer portion of the O-ring abuts against the inner wall of the air inlet.

[0008] Preferably, a fluororubber vulcanized ring corresponding to the valve disc is fixedly embedded in the bottom of the valve cover.

[0009] Preferably, the valve cover is surrounded by a plurality of openings corresponding to the air inlets.

[0010] Preferably, a limiting protrusion corresponding to the spring is fixedly connected to the inner bottom of the valve body.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The utility model adopts the arrangement of the double-guide valve stem structure to effectively ensure the stability of the valve disc movement, so that the medium can flow smoothly and reduce noise, thereby effectively improving the use effect of the check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the internal structure of the wafer-type check valve proposed in the present invention;

[0014] Figure 2 This is a side structural schematic diagram of the wafer-type check valve proposed in the present invention.

[0015] In the figure: 1 valve body, 2 valve cover, 3 valve stem, 4 spring, 5 O-ring, 6 fluororubber vulcanized ring, 7 valve disc, 8 limit bump. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Reference Figure 1-2 , Wafer-type check valve, including a valve body 1, with an air inlet and an air outlet at both ends of the valve body 1 respectively, a valve cover 2 is inserted into the air inlet of the valve body 1 through a thread, for mounting and fixing the valve stem 3, and a plurality of openings corresponding to the air inlet are arranged around the valve cover 2 for the passage of the medium;

[0018] In this embodiment, an O-ring 5 is fixedly sleeved on the valve cover 2. The outer portion of the O-ring 5 abuts against the inner wall of the air inlet to ensure the sealing of the valve cover 2. A valve stem 3 is slidably inserted into the middle of the valve cover 2. The end of the valve stem 3 away from the valve cover 2 is slidably connected to the inner wall of the valve body 1 to support the valve disc 7.

[0019] In this embodiment, a valve disc 7 is fixedly sleeved on the valve stem 3 to control the flow of the medium. A fluororubber vulcanized ring 6 corresponding to the valve disc 7 is fixedly embedded in the bottom of the valve cover 2 to ensure the sealing between the valve disc 7 and the valve cover 2.

[0020] In this embodiment, a spring 4 is sleeved on the valve stem 3, and the two ends of the spring 4 are respectively against the valve disc 7 and the inner wall of the valve body 1, providing a certain elastic support for the valve disc 7. The inner bottom of the valve body 1 is fixedly connected with a limiting protrusion 8 corresponding to the spring 4 to prevent the spring 4 from shaking.

[0021] In this embodiment, the provision of a double-guide valve stem structure can effectively ensure the stability of the movement of the valve flap 7, allowing the medium to flow smoothly and reduce noise, thereby effectively improving the use effect of the check valve.

[0022] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wafer-type check valve comprising a valve body (1), characterized in that: An air inlet and an air outlet are respectively provided at both ends of the valve body (1); a valve cover (2) is inserted into the air inlet of the valve body (1) through a thread; a valve stem (3) is slidably inserted into the middle of the valve cover (2); an end of the valve stem (3) away from the valve cover (2) is slidably connected to the inner wall of the valve body (1); a valve flap (7) is fixedly sleeved on the valve stem (3); a spring (4) is sleeved on the valve stem (3), and both ends of the spring (4) are respectively against the valve flap (7) and the inner wall of the valve body (1).

2. The wafer-type check valve according to claim 1, characterized in that: An O-ring (5) is fixedly sleeved on the valve cover (2), and the outer portion of the O-ring (5) abuts against the inner wall of the air inlet.

3. The wafer-type check valve according to claim 1, characterized in that: A fluororubber vulcanized ring (6) corresponding to the valve flap (7) is fixedly embedded in the bottom of the valve cover (2).

4. The wafer-type check valve according to claim 1, characterized in that: The valve cover (2) is surrounded by a plurality of openings corresponding to the air inlets.

5. The wafer-type check valve according to claim 1, characterized in that: A limiting protrusion (8) corresponding to the spring (4) is fixedly connected to the inner bottom of the valve body (1).

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