Silencing check valve

Abstract

The utility model relates to the technical field of check valves, and provides a noise elimination check valve which comprises a noise elimination check valve body, a valve seat is installed at the bottom end in the noise elimination check valve body, cleaning structures are evenly installed on the side wall of the valve seat, and each cleaning structure comprises a lower wedge block, a limiting spring, a connecting rod, a scraper blade, a groove and an upper wedge block. Grooves are evenly formed in the side wall of the valve seat, connecting rods are installed in the grooves, scraping plates are installed at one ends of the connecting rods, lower wedge blocks are installed at the other ends of the connecting rods, limiting springs are installed between the lower wedge blocks and the inner wall of the silencing check valve body, and upper wedge blocks are arranged above the lower wedge blocks. By means of the cleaning structure, when the valve clack pressing disc gets close to the outlet well cap, the upper wedge block is separated from the lower wedge block, the limiting spring drives the lower wedge block to return to the initial position, the scraping plate moves, impurities attached to the valve seat can be scraped down in the moving process, and the purpose of cleaning the valve seat is achieved.

Description

Technical Field

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

[0002] There are many types of check valves, which can be divided into silent check valves, rubber flap check valves and double flap check valves. Among them, silent check valves are also called muffler check valves. Muffler check valves refer to valves that automatically open and close the valve disc based on the flow of the medium itself to prevent the backflow of the medium.

[0003] To this end, patent publication number CN220102270U discloses a silencer check valve, characterized by comprising a valve body and a valve core; the valve core is slidably disposed within the valve body. The silencer check valve disclosed in this utility model has a short sliding stroke, so the valve core can close quickly when the pump is stopped, preventing the occurrence of water hammer and thus generating no significant noise.

[0004] When the existing silencer check valve is in use, impurities in the water easily adhere to the valve seat in the valve body, causing the valve seat to be uneven, so that the valve disc pressure plate cannot fit tightly with the valve seat, affecting the sealing effect of the silencer check valve. Utility Model Content

[0005] The utility model aims to provide a silencer check valve, so as to solve the defect of poor sealing effect of the existing silencer check valve.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a silencer check valve, comprising a silencer check valve body, a valve seat is installed at the bottom end of the silencer check valve body, and a cleaning structure is evenly installed on the side wall of the valve seat, the cleaning structure comprises a lower wedge, a limit spring, a connecting rod, a scraper, a groove and an upper wedge, the grooves are evenly opened on the side wall of the valve seat, connecting rods are installed in the interior of the grooves, and a scraper is installed at one end of the connecting rod, a lower wedge is installed at the other end of the connecting rod, and a limit spring is installed between the lower wedge and the inner wall of the silencer check valve body, an upper wedge is provided above the lower wedge, an outlet well cap is installed at the top end of the silencer check valve body, a valve disc pressure plate is installed in the interior of the silencer check valve body, a valve stem is fixedly installed at the top end of the valve disc pressure plate, a telescopic spring is sleeved on the valve stem, and the telescopic spring is connected to the outlet well cap, and the cleaning structure can clean impurities on the valve seat, so that the valve seat and the valve disc pressure plate can fit tightly.

[0007] Preferably, the outlet well cap is provided with a through hole having a diameter larger than the diameter of the valve stem.

[0008] Preferably, a sealing gasket is installed on the inner side of the scraper. The provision of the sealing gasket can improve the sealing between the valve disc pressure plate and the valve seat.

[0009] Preferably, the valve disc pressure plate is composed of an upper pressure plate and a lower pressure plate, and the diameter of the upper pressure plate is larger than the diameter of the lower pressure plate.

[0010] Preferably, the valve seat is provided with a recessed platform that matches the lower pressure plate.

[0011] Preferably, the upper wedge blocks are fixedly connected to the lower pressure plate, and the upper wedge blocks are arranged at equal intervals below the lower pressure plate.

[0012] Preferably, a sealing ring is installed on the inner wall of the outlet well cap. The provision of the sealing ring can improve the sealing between the valve stem and the outlet well cap.

[0013] The utility model provides a silencer check valve, which has the following advantages:

[0014] When the disc pressure plate approaches the outlet manhole cap, the cleaning structure can clean the impurities on the valve seat, so that the valve seat and the disc pressure plate can fit tightly, thereby improving the sealing performance of the silencer check valve. When the disc pressure plate approaches the valve seat, the sealing gasket contacts the disc pressure plate, which can further improve the sealing performance between the disc pressure plate and the valve seat, thereby achieving the purpose of double sealing. The sealing ring can enhance the sealing performance between the valve stem and the outlet manhole cap.

[0015] Through the cleaning structure, when the valve disc pressure plate approaches the outlet well cap, the upper wedge and the lower wedge separate, the limit spring drives the lower wedge back to the initial position, and the scraper moves. During the movement, it can scrape off the impurities attached to the valve seat to achieve the purpose of cleaning it;

[0016] Through the provided sealing gasket, when the valve disc pressure plate approaches the valve seat, the upper wedge pushes the lower wedge to move, the scraper approaches the inner wall of the silencer check valve body, and the sealing gasket contacts the valve disc pressure plate. The sealing gasket can further improve the sealing between the valve disc pressure plate and the valve seat, achieving the purpose of double sealing;

[0017] By setting a sealing ring, the sealing ring can enhance the sealing between the valve stem and the outlet well cap, avoid the situation where impurities adhere to the inner wall of the outlet well cap and make the valve stem difficult to move, and improve the use effect of the silencer check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0020] Figure 3 For the utility model Figure 2 A in the middle is an enlarged structural diagram;

[0021] Figure 4 This is a schematic diagram of the front view structure of the valve disc pressure plate of the present utility model;

[0022] Figure 5 It is a partial front view cross-sectional structural schematic diagram of the utility model.

[0023] Explanation of the reference numerals in the figure: 1. Silencer check valve body; 2. Valve stem; 3. Outlet well cap; 4. Telescopic spring; 5. Cleaning structure; 501. Lower wedge; 502. Limit spring; 503. Connecting rod; 504. Scraper; 505. Sealing gasket; 506. Groove; 507. Upper wedge; 6. Valve disc pressure plate; 601. Upper pressure plate; 602. Lower pressure plate; 7. Valve seat; 701. Concave platform; 8. Sealing ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 The utility model provides a silencer check valve, which includes a silencer check valve body 1.

[0026] Reference Figure 1-Figure 5 As shown, a valve seat 7 is installed at the bottom end of the silencer check valve body 1, and a cleaning structure 5 is evenly installed on the side wall of the valve seat 7. The cleaning structure 5 includes a lower wedge block 501, a limit spring 502, a connecting rod 503, a scraper 504, a groove 506 and an upper wedge block 507. The grooves 506 are evenly opened on the side wall of the valve seat 7. Connecting rods 503 are installed inside the grooves 506, and a scraper 504 is installed at one end of the connecting rod 503. The lower wedge block 501 is installed at the other end of the connecting rod 503, and a limit spring 502 is installed between the lower wedge block 501 and the inner wall of the silencer check valve body 1, and an upper wedge block 507 is arranged above the lower wedge block 501.

[0027] The top of the silencer check valve body 1 is installed with an outlet well cap 3, and the inside of the silencer check valve body 1 is installed with a valve disc pressure plate 6. The top of the valve disc pressure plate 6 is fixedly installed with a valve stem 2, and a telescopic spring 4 is sleeved on the valve stem 2, and the telescopic spring 4 is connected to the outlet well cap 3. The valve disc pressure plate 6 is composed of an upper pressure plate 601 and a lower pressure plate 602. The diameter of the upper pressure plate 601 is larger than the diameter of the lower pressure plate 602. A recessed platform 701 is provided on the valve seat 7 to match the lower pressure plate 602. When the silencer check valve is closed, the lower pressure plate 602 is stuck in the recessed platform 701, which can improve the sealing between the valve seat 7 and the valve disc pressure plate 6. The upper wedge block 507 is fixedly connected to the lower pressure plate 602. The upper wedge blocks 507 are arranged at equal intervals below the lower pressure plate 602. The upper wedge blocks 507 arranged at equal intervals can improve the pushing effect on the lower wedge block 501.

[0028] When the silencer check valve is opened, the valve disc pressure plate 6 approaches the outlet well cap 3, the upper wedge block 507 separates from the lower wedge block 501, the limit spring 502 drives the lower wedge block 501 back to the initial position, and the scraper 504 moves. During the movement, the impurities attached to the valve seat 7 can be scraped off to achieve the purpose of cleaning it.

[0029] Reference Figure 2 and Figure 3 As shown, a sealing gasket 505 is installed on the inner side of the scraper 504.

[0030] When the silencer check valve is closed, the valve disc pressure plate 6 approaches the valve seat 7, the upper wedge block 507 pushes the lower wedge block 501 to move, the limit spring 502 is compressed, the scraper 504 approaches the inner wall of the silencer check valve body 1, and the sealing gasket 505 contacts the valve disc pressure plate 6. The sealing gasket 505 can further improve the sealing between the valve disc pressure plate 6 and the valve seat 7, thereby achieving the purpose of double sealing.

[0031] Reference Figure 2 and Figure 5 As shown, a through hole with a diameter larger than that of the valve stem 2 is opened on the outlet well cap 3, and a sealing ring 8 is installed on the inner wall of the outlet well cap 3. The sealing ring 8 is arranged on the inner wall of the through hole.

[0032] The sealing ring 8 can enhance the sealing between the valve stem 2 and the outlet well cap 3, avoid the situation where impurities adhere to the inner wall of the outlet well cap 3 and make the valve stem 2 difficult to move, and improve the use effect of the silencer check valve.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A silencer check valve, comprising a silencer check valve body (1); Its characteristics are: A valve seat (7) is installed at the bottom end of the interior of the silencer check valve body (1), and a cleaning structure (5) is evenly installed on the side wall of the valve seat (7); The cleaning structure (5) comprises a lower wedge (501), a limit spring (502), a connecting rod (503), a scraper (504), a groove (506) and an upper wedge (507), wherein the grooves (506) are evenly arranged on the side wall of the valve seat (7), the connecting rods (503) are installed inside the grooves (506), and the scraper (504) is installed at one end of the connecting rods (503), the lower wedge (501) is installed at the other end of the connecting rods (503), and a limit spring (502) is installed between the lower wedge (501) and the inner wall of the silencer check valve body (1), and the upper wedge (507) is arranged above the lower wedge (501); An outlet well cap (3) is installed at the top end of the silencer check valve body (1), a valve disc pressure plate (6) is installed inside the silencer check valve body (1), a valve stem (2) is fixedly installed at the top end of the valve disc pressure plate (6), a telescopic spring (4) is sleeved on the valve stem (2), and the telescopic spring (4) is connected to the outlet well cap (3).

2. A muffler check valve according to claim 1, characterized in that: The outlet well cap (3) is provided with a through hole having a diameter larger than that of the valve stem (2).

3. The muffler check valve according to claim 1, characterized in that: A sealing gasket (505) is installed on the inner side of the scraper (504).

4. The muffler check valve according to claim 1, characterized in that: The valve disc pressure plate (6) is composed of an upper pressure plate (601) and a lower pressure plate (602), and the diameter of the upper pressure plate (601) is larger than the diameter of the lower pressure plate (602).

5. The muffler check valve according to claim 1, characterized in that: The valve seat (7) is provided with a recessed platform (701) that matches the lower pressure plate (602).

6. The muffler check valve according to claim 1, characterized in that: The upper wedge blocks (507) are fixedly connected to the lower pressure plate (602), and the upper wedge blocks (507) are arranged at equal intervals below the lower pressure plate (602).

7. The muffler check valve according to claim 1, characterized in that: A sealing ring (8) is installed on the inner wall of the outlet well cap (3).

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