Check valve

Abstract

A valve body is hollow, an end cover is arranged on one side of the valve body, a medium inlet is formed in the end cover, a valve plate is arranged on one side of the end cover, an installation disc is fixedly connected in the valve plate, a valve rod is fixedly inserted in the installation disc, an elastic piece is arranged on the valve rod in a sleeved mode, and the elastic piece is arranged on the valve rod. The medium inlet and one end of the valve body are both internally provided with abrasion-resistant bushings, the abrasion-resistant bushings are fixedly connected through a plurality of connecting plates, the valve rod is inserted into the abrasion-resistant bushings in a sliding mode, and the two ends of the elastic piece are fixedly connected with the valve plate and the connecting plates in the valve body respectively. The valve rod is slidably supported through the wear-resistant bushes at the two ends to reduce running wear and avoid jamming, and the elastic piece assists closing, so that the valve is high in closing speed, small in fluid resistance, simple in structure, convenient to operate and suitable for popularization and application.

Description

Technical Field

[0001] The utility model relates to the field of check valve related products, in particular to a check valve. Background Art

[0002] A check valve is a self-closing valve installed in a pipeline to prevent the flow of fluid in one direction only. It prevents reverse flow and ensures that the fluid flows in the intended direction, avoiding potential problems caused by reverse flow. This valve automatically opens and closes based on the flow of the fluid itself, without the need for external power.

[0003] However, the existing check valve has a relatively complicated internal structure, a large pressure difference resistance when opening the medium, and hard friction between the valve stem and the valve body during operation, which can easily cause severe wear of the valve stem. At the same time, it cannot be used in both vertical and horizontal pipelines, which is defective. Utility Model Content

[0004] The purpose of the present utility model is to provide a check valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a check valve, comprising a valve body, which is hollow, an end cover is provided on one side of the valve body, a medium inlet is provided on the end cover, a valve plate is provided on one side of the end cover, a mounting disk is fixedly connected to the valve plate, a valve stem is fixedly inserted in the mounting disk, an elastic member is sleeved on the valve stem, a wear-resistant bushing is provided in the medium inlet and one end of the valve body, the wear-resistant bushing is fixedly connected by a plurality of connecting plates, the valve stem is slidably inserted in the wear-resistant bushing, and the two ends of the elastic member are respectively fixedly connected to the valve plate and the connecting plate in the valve body.

[0006] Preferably, an external thread is provided on the outer side wall of the end cover, a screw hole is provided on the inner wall of one end of the valve body, and the end cover is threadedly inserted into the valve body.

[0007] Preferably, a positioning ring is fixedly connected to one side of the end cover, a sealing ring is sleeved on the positioning ring, a groove is provided on one side of the valve plate, and the valve plate is slidably sleeved on the positioning ring.

[0008] Preferably, the elastic member is a spring.

[0009] Preferably, the sealing ring is a fluororubber O-ring.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] When the medium enters through the medium inlet, the valve plate moves under the push of the medium, thereby leaking out the medium inlet and allowing the medium to enter. At this time, the valve plate will drive the valve stem to move in the wear-resistant bushing of the valve body for guiding movement. The wear-resistant bushing improves the sliding support of the valve stem and reduces wear. At the same time, the valve plate will compress the elastic member. When the inlet side pressure is lower than the outlet side pressure, the elastic member in the compressed state pushes the valve plate back to its initial position under the action of its own rebound force, thereby achieving sealing of the medium inlet on the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the split structure of a check valve of the utility model;

[0013] Figure 2 This is a schematic diagram of the valve plate structure of a check valve of the present invention.

[0014] In the figure: 1. Valve body; 2. End cover; 3. Medium inlet; 4. Valve plate; 5. Mounting plate; 6. Valve stem; 7. Elastic part; 8. Wear-resistant bushing; 9. Connecting plate; 10. Positioning ring; 11. Sealing ring; 12. Slot. DETAILED DESCRIPTION

[0015] 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.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0018] See also Figure 1-2 , the utility model provides an embodiment: a check valve, including a valve body 1, the valve body 1 is hollow, one side of the valve body 1 is provided with an end cover 2, the end cover 2 is provided with a medium inlet 3, one side of the end cover 2 is provided with a valve plate 4, the valve plate 4 is fixedly connected with a mounting disk 5, the mounting disk 5 is fixedly inserted with a valve stem 6, the valve stem 6 is sleeved with an elastic member 7, the medium inlet 3 and one end of the valve body 1 are both provided with a wear-resistant bushing 8, the wear-resistant bushing 8 is fixedly connected by a plurality of connecting plates 9, the valve stem 6 is slidably inserted in the wear-resistant bushing 8, and the two ends of the elastic member 7 are respectively fixedly connected to the valve plate 4 and the connecting plate 9 in the valve body 1. Specifically, the end cover 2 is fixed to one end of the valve body 1, and the valve stem 6 is fixedly inserted with a mounting disk 5 is fixed on the valve plate 4, and the valve plate 4 achieves a sealing effect on the medium inlet 3 on the end cover 2. The elastic member 7 is installed between the valve plate 4 and the valve body 1 and is sleeved on the valve stem 6. When the medium enters through the medium inlet 3, the valve plate 4 moves under the push of the medium and leaks out of the medium inlet 3 to allow the medium to enter. At this time, the valve plate 4 will drive the valve stem 6 to move in the wear-resistant bushing 8 in the valve body 1. The wear-resistant bushing 8 improves the sliding support of the valve stem 6 and reduces wear. At the same time, the valve plate 4 will compress the elastic member 7. When the pressure on the inlet side is lower than that on the outlet side, the elastic member 7 in the compressed state pushes the valve plate 4 to return to its initial position under the action of its own rebound force, thereby achieving sealing of the medium inlet 3 on the end cover 2.

[0019] In this embodiment, an external thread is provided on the outer wall of the end cover 2, and a threaded hole is provided on the inner wall of one end of the valve body 1. The end cover 2 is threadedly inserted into the valve body 1, and the soft connection method is easy to maintain; a positioning ring 10 is fixedly connected to one side of the end cover 2, and a sealing ring 11 is sleeved on the positioning ring 10. A slot 12 is provided on one side of the valve plate 4, and the valve plate 4 is slidably sleeved on the positioning ring 10 to increase the sealing effect and reduce the risk of leakage; the elastic part 7 is a spring with high acquisition degree; the sealing ring 11 is a fluororubber O-ring to increase the high temperature resistance effect.

[0020] Working principle: First, install the valve body 1 between the inlet and outlet sides of the pipeline, and fix it to one end of the valve body 1 through the end cover 2. The valve stem 6 is fixed to the valve plate 4 through the mounting plate 5. The valve plate 4 achieves a sealing effect on the medium inlet 3 on the end cover 2. The elastic member 7 is installed between the valve plate 4 and the valve body 1 and is sleeved on the valve stem 6. When the medium enters through the medium inlet 3, the valve plate 4 moves under the push of the medium and leaks out of the medium inlet 3 to allow the medium to enter. At this time, the valve plate 4 will drive the valve stem 6 to guide movement in the wear-resistant bushing 8 in the valve body 1. The wear-resistant bushing 8 improves the sliding support of the valve stem 6 and reduces wear. At the same time, the valve plate 4 will compress the elastic member 7. When the pressure on the inlet side is lower than that on the outlet side, the elastic member 7 in the compressed state pushes the valve plate 4 to return to its initial position under the action of its own rebound force, thereby achieving the sealing of the medium inlet 3 on the end cover 2.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A check valve, comprising a valve body (1), characterized in that: The valve body (1) is hollow, and an end cover (2) is provided on one side of the valve body (1), and a medium inlet (3) is provided on the end cover (2). A valve plate (4) is provided on one side of the end cover (2), and a mounting plate (5) is fixedly connected to the valve plate (4), and a valve stem (6) is fixedly inserted in the mounting plate (5), and an elastic member (7) is sleeved on the valve stem (6). The medium inlet (3) and one end of the valve body (1) are both provided with a wear-resistant bushing (8), and the wear-resistant bushing (8) is fixedly connected through a plurality of connecting plates (9). The valve stem (6) is slidably inserted in the wear-resistant bushing (8), and the two ends of the elastic member (7) are respectively fixedly connected to the valve plate (4) and the connecting plate (9) in the valve body (1).

2. A check valve according to claim 1, characterized in that: An external thread is provided on the outer wall of the end cover (2), a screw hole is provided on the inner wall of one end of the valve body (1), and the end cover (2) is threadedly inserted into the valve body (1).

3. A check valve according to claim 1, characterized in that: A positioning ring (10) is fixedly connected to one side of the end cover (2), a sealing ring (11) is sleeved on the positioning ring (10), a clamping groove (12) is provided on one side of the valve plate (4), and the valve plate (4) is slidably sleeved on the positioning ring (10).

4. A check valve according to claim 1, characterized in that: The elastic member (7) is a spring.

5. The check valve according to claim 3, characterized in that: The sealing ring (11) is a fluororubber O-ring.

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