Check valve with pressure compensation structure

Abstract

The utility model discloses a check valve with a pressure compensation structure, which relates to the technical field of check valves and comprises a valve body, a valve cover, an extension plate, a rotating part, a sealing seat, a containing cavity, a valve clack rotating towards the containing cavity, a first pressure generating device fixedly mounted on the valve clack and a second pressure generating device fixedly mounted in the containing cavity. The valve clack drives the first pressure generating device to be close to the second pressure generating device, and repulsive force is generated between the first pressure generating device and the second pressure generating device. The utility model has the advantages that when the valve clack rotates anticlockwise towards the direction of the accommodating cavity, the first pressure generating device on the valve clack gradually approaches the second pressure generating device, mutual repulsive force is generated between the first pressure generating device and the second pressure generating device, the pressure compensation is provided to prevent the valve clack from excessively rotating and touching and knocking the valve body, the protective property is good, and the noise is reduced; the valve cover is detachably fixed on the valve body so as to open and close the containing cavity, and the extension plate is fixed on the valve cover so as to be convenient to disassemble, assemble and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field more specifically is related to a check valve with pressure compensation structure. BACKGROUND

[0002] Swing check valve is a kind of check valve, mainly used to prevent the fluid in pipeline from flowing in reverse, its working principle is to control the direction of fluid by a valve clack that can rotate around shaft, when fluid flows forward, its pressure will push away valve clack, so that fluid passes smoothly, and when fluid attempts to flow in reverse, valve clack will close under the action of reverse pressure, preventing fluid from flowing in reverse.

[0003] The existing swing check valve, in order to improve the space of valve clack rotation, generally sets the containing space for valve clack insertion on the side of flow-through space relative to the position after valve clack rotation, "such as application number: CN201720421275.1, a swing check valve" is shown, in order to prevent excessive rotation of valve clack, "limiting device 2" is also set to contact valve clack and block.

[0004] But when water flow impact is big or flow pressure is unstable, valve clack will directly knock in valve interior and produce vibration, there is the shortcoming of easy damage, and frequent touch can be generated, and certain noise is generated. UTILITY MODEL CONTENTS

[0005] The utility model discloses a check valve with pressure compensation structure.

[0006] The utility model discloses a check valve with pressure compensation structure.

[0007] The utility model discloses a check valve with pressure compensation structure, including accommodating cavity and the valve clack that rotates to accommodating cavity, still include the first pressure generating device of being fixed on valve clack and the second pressure generating device of being fixed in accommodating cavity, valve clack drives first pressure generating device to be close to second pressure generating device and the repulsive force between first pressure generating device and second pressure generating device.

[0008] As a preferred technical scheme of the utility model, the first pressure generating device includes the first recess on valve clack, the first magnetic plate fixed in the inside of first recess and the first outer protection assembly covering first recess and being fixed with valve clack.

[0009] As a preferred technical scheme of the utility model, the first outer protection assembly includes the first package piece, the first convex ring of being fixed on the periphery of first package piece and the first ring groove on valve clack, first ring groove surrounds first recess, and first convex ring is fixed in first ring groove.

[0010] As a preferred embodiment of the present invention, the second pressure generating device includes a second groove fixed in the accommodating cavity, a second magnetic plate fixed inside the second groove, and a second outer protective assembly covering the second groove and fixed to the accommodating cavity, wherein the magnetic poles of the second magnetic plate and the first magnetic plate facing each other are the same.

[0011] As a preferred technical solution of this utility model, the second outer protective component includes a second cover piece, a second convex ring fixed to the periphery of the second cover piece, and a second annular groove provided on the accommodating cavity. The second annular groove surrounds the second groove, and the second convex ring is fitted and fixed inside the second annular groove.

[0012] As a preferred technical solution of this utility model, it also includes a valve body, a valve cover that can be detachably fixed at the top of the valve body, and an extension plate fixed on the valve cover. The accommodating cavity is located between the valve covers and the valve body, the valve disc is located in the valve body, the extension plate is located in the accommodating cavity, and the second pressure generating device is fixed on the extension plate.

[0013] As a preferred technical solution of this utility model, it also includes a rotating component and a sealing seat installed in the valve body, with the valve disc fixed on the rotating component and the valve disc attached to the sealing seat to cut off the valve body.

[0014] The beneficial effects of this utility model are as follows:

[0015] When the valve disc rotates counterclockwise toward the receiving cavity, the first pressure generating device on the valve disc gradually approaches the second pressure generating device, and a mutual repulsive force is generated between them. This pressure compensation prevents the valve disc from rotating excessively and causing contact and knocking on the valve body, providing good protection and noise reduction. The valve cover is detachably fixed on the valve body to open and close the receiving cavity, and the extension plate is fixed on the valve cover for easy disassembly and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the local structure A;

[0018] Figure 3 yes Figure 1 A schematic diagram of the local structure B.

[0019] Reference numerals: accommodating cavity-1, valve disc-2, first pressure generating device-3, second pressure generating device-4, valve body-5, valve cover-6, extension plate-7, rotating component-8, sealing seat-9, first groove-31, first magnetic plate-32, first outer protective assembly-33, first protective piece-331, first convex ring-332, first annular groove-333, second groove-41, second magnetic plate-42, second outer protective assembly-43, second protective piece-431, second convex ring-432, second annular groove-433. Detailed Implementation

[0020] like Figures 1-3 As shown, this utility model proposes: a check valve with a pressure compensation structure, including a accommodating cavity 1 and a valve disc 2 that rotates toward the accommodating cavity 1, and also including a first pressure generating device 3 fixed on the valve disc 2 and a second pressure generating device 4 fixed in the accommodating cavity 1. The valve disc 2 drives the first pressure generating device 3 to approach the second pressure generating device 4 and a repulsive force is generated between the first pressure generating device 3 and the second pressure generating device 4.

[0021] It also includes a valve body 5, a rotating component 8 installed in the valve body 5 and a sealing seat 9. The valve disc 2 is fixed on the rotating component 8 and fits against the sealing seat 9 to cut off the valve body 5. The rotating component 8 is a rotating shaft or a spring hinge or the "pin" of the background technology "CN201720421275.1".

[0022] The valve body 5 has a valve cavity that connects the left and right sides, with the left side being the water inlet (the valve body 5 can also be installed vertically, with the water flow direction upward). The receiving cavity 1 is located at the top of the valve body 5. A rotating component 8 is fixedly installed in the receiving cavity 1, and the rotating end of the rotating component 8 fixes the valve disc 2. The left end of the valve disc 2 is attached to the right end of the sealing seat 9 to seal and cut off the left and right connection of the valve cavity. When the water flows to the right, the valve disc 2 rotates counterclockwise toward the receiving cavity 1. At this time, the first pressure generating device 3 on the valve disc 2 gradually approaches the second pressure generating device 4, and a mutual repulsive force is generated between them. This pressure compensation is provided to prevent the valve disc 2 from rotating excessively and causing contact and knocking on the valve body 5, providing good protection and noise reduction.

[0023] It also includes a valve cover 6 that can be detachably fixed to the top of the valve body 5, and an extension plate 7 fixed on the valve cover 6. The accommodating cavity 1 is located between the valve cover 6 and the valve body 5. The valve disc 2 is located inside the valve body 5. The extension plate 7 is located inside the accommodating cavity 1 and the second pressure generating device 4 is fixed on the extension plate 7.

[0024] A valve cover 6 is installed at the top of the valve body 5 corresponding to the position of the receiving cavity 1. A rubber sealing gasket is added between the valve cover 6 and the top of the valve body 5 as an interlayer, and then the valve body 5 is fixed together by bolts for detachable fixation. The receiving cavity 1 can be exposed by removing the valve cover 6 to facilitate cleaning and maintenance of the inside of the valve body 5. When the extension plate 7 is installed on the valve cover 6, it can be disassembled and installed together for maintenance.

[0025] The specific structure of the first pressure-generating device 3 is shown below:

[0026] The first pressure generating device 3 includes a first groove 31 provided on the valve disc 2, a first magnetic plate 32 fixed inside the first groove 31, and a first outer protective assembly 33 covering the first groove 31 and fixed to the valve disc 2; the first groove 31 is opened on the end face of the valve disc 2 facing the accommodating cavity 1, the first magnetic plate 32 is placed into the first groove 31 and fixed by means of bonding or other methods, and the first outer protective assembly 33 is provided to cover the outside of the first groove 31 and the first outer protective assembly 33 is fixed to the valve disc 2, so as to prevent the first magnetic plate 32 from being worn;

[0027] Furthermore, the first outer protective component 33 includes a first covering piece 331, a first protruding ring 332 fixed around the first covering piece 331, and a first annular groove 333 disposed on the valve disc 2. The first annular groove 333 surrounds the first groove 31, and the first protruding ring 332 is fitted and fixed inside the first annular groove 333. The first covering piece 331 and the first protruding ring 332 are made of rubber. The first magnetic plate 32 is covered by the first covering piece 331, and the first protruding ring 332 is fixed in the first annular groove 333 by bonding or other means, thus protecting the first magnetic plate 3. The first covering piece 331 can also be fitted and fixed to the surface of the first magnetic plate 32 and the valve disc 2 by bonding or other means to improve the connection strength.

[0028] The specific structure of the second pressure-generating device 4 is shown below:

[0029] The second pressure generating device 4 includes a second groove 41 fixed in the accommodating cavity 1, a second magnetic plate 42 fixed inside the second groove 41, and a second outer protective component 43 covering the second groove 41 and fixed to the accommodating cavity 1; the second groove 41 is opened in the downward direction of the accommodating cavity 1, and the second groove 41 is placed into the second groove 41 and fixed by means of adhesive or other methods. The second outer protective component 43 is covered and fixed to the outside of the second groove 41 and the second outer protective component 43 is fixed to the accommodating cavity 1, so as to prevent the second magnetic plate 42 from being worn.

[0030] The second magnetic plate 42 and the first magnetic plate 32 have the same magnetic poles facing each other, such as Figure 1 As shown, the first magnetic plate 32 is located at the right end of the valve disc 2, and the second magnetic plate 42 is located at the bottom end of the accommodating cavity 1.

[0031] Furthermore, the second outer protective assembly 43 includes a second covering piece 431, a second protruding ring 432 fixed around the second covering piece 431, and a second annular groove 433 disposed on the receiving cavity 1. The second annular groove 433 surrounds the second recess 41, and the second protruding ring 432 is fitted and fixed inside the second annular groove 433. The second covering piece 431 and the second protruding ring 432 are made of rubber. The second magnetic plate 42 is covered by the second covering piece 431, and the second protruding ring 432 is fixed in the second annular groove 433 by bonding or other means, thus protecting the second magnetic plate 42. The second covering piece 431 can also be fitted and fixed to the surface of the second magnetic plate 42 and the receiving cavity 1 by bonding or other means to improve the connection strength.

[0032] like Figure 1 , 3 As shown above, when the second pressure generating device 4 is fixed on the extension plate 7, a second groove 41 is opened at the bottom end of the extension plate 7 and fixed to the second outer protective component 43.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A check valve with a pressure compensation structure, comprising a receiving cavity (1) and a valve disc (2) rotating toward the receiving cavity (1), characterized in that, It also includes a first pressure generating device (3) fixed on the valve disc (2) and a second pressure generating device (4) fixed in the accommodating cavity (1). The valve disc (2) drives the first pressure generating device (3) to approach the second pressure generating device (4) and a repulsive force is generated between the first pressure generating device (3) and the second pressure generating device (4).

2. A check valve with a pressure compensation structure according to claim 1, characterized in that, The first pressure generating device (3) includes a first groove (31) disposed on the valve disc (2), a first magnetic plate (32) fixed inside the first groove (31), and a first outer protective assembly (33) covering the first groove (31) and fixed to the valve disc (2).

3. A check valve with a pressure compensation structure according to claim 2, characterized in that, The first outer protective component (33) includes a first cover piece (331), a first protruding ring (332) fixed on the periphery of the first cover piece (331), and a first annular groove (333) provided on the valve disc (2). The first annular groove (333) surrounds the first groove (31), and the first protruding ring (332) is fitted and fixed inside the first annular groove (333).

4. A check valve with a pressure compensation structure according to claim 3, characterized in that, The second pressure generating device (4) includes a second groove (41) fixed in the accommodating cavity (1), a second magnetic plate (42) fixed inside the second groove (41), and a second outer protective assembly (43) covering the second groove (41) and fixed to the accommodating cavity (1). The magnetic poles of the second magnetic plate (42) and the first magnetic plate (32) facing each other are the same.

5. A check valve with a pressure compensation structure according to claim 4, characterized in that, The second outer protective assembly (43) includes a second cover piece (431), a second protruding ring (432) fixed on the periphery of the second cover piece (431), and a second annular groove (433) provided on the receiving cavity (1). The second annular groove (433) surrounds the second groove (41), and the second protruding ring (432) is fitted and fixed inside the second annular groove (433).

6. A check valve with a pressure compensation structure according to claim 1 or 5, characterized in that, It also includes a valve body (5), a valve cover (6) that can be detachably fixed at the top of the valve body (5), and an extension plate (7) fixed on the valve cover (6). The accommodating cavity (1) is located between the valve body (5) and the valve cover (6). The valve disc (2) is located inside the valve body (5). The extension plate (7) is located inside the accommodating cavity (1) and the second pressure generating device (4) is fixed on the extension plate (7).

7. A check valve with a pressure compensation structure according to claim 6, characterized in that, It also includes a rotating part (8) and a sealing seat (9) installed in the valve body (5), with the valve disc (2) fixed on the rotating part (8) and the valve disc (2) attached to the sealing seat (9) to cut off the valve body (5).

Images