Sliding plate slag locking valve

Abstract

The utility model discloses a sliding plate slag locking valve which comprises a valve cover (1) and a valve body (2), an air cylinder (3) is arranged on the valve cover (1), a valve plate (5) with a valve rod (4) is arranged in the valve body (2), and the upper end of the valve rod (4) is connected with the air cylinder (3). A valve seat is arranged in the valve body (2), and the valve plate (5) is located at the valve seat and matched with the valve seat. And an inlet sealing structure is arranged between the inlet end of the valve seat and the valve body (2). The slag discharge valve has the advantages of being ingenious in structural design, reliable in use and low in cost, not only can the sealing performance be improved, but also the abrasion of the slag to the valve body is reduced by discharging the slag, the service life is prolonged, and the stable operation of the whole system is ensured.

Description

Technical Field

[0001] The utility model relates to a valve body, in particular to a slide plate slag locking valve. Background Art

[0002] Currently, valves used for particulate media are primarily ball valves. During the opening and closing process, particles that accumulate in the corners of the ball valve (the gap between the ball center and the valve body) and in the valve cavity can easily squeeze and scratch the sealing surface, causing the valve to leak after a period of use. When particles accumulate and adhere to the valve cavity and sealing surface, increasing resistance to movement, the load on the valve shaft increases exponentially due to the ball center radius of the ball valve, causing the valve to jam when opening and closing, resulting in wear and a short lifespan. Furthermore, in media conditions involving solid particles in slag water, the valve's wear and erosion resistance struggles to meet stringent industrial requirements, making maintenance extremely difficult and impacting the stable operation and service life of the entire system.

[0003] CN102720852A discloses an invention patent application titled "A Wear-Resistant Slide Valve," which includes a valve body with a flow channel, a gasket, a valve cover, a valve seat, a valve plate, a cylindrical compression spring, a pressure ring, and a valve stem. A sealing pair is provided between the valve seat and the valve plate. The slide valve also includes a disc spring, an O-ring, a graphite ring, and a valve seat graphite rope. The disc spring is positioned between the pressure ring and the valve seat, the O-ring and the valve seat graphite rope are both sleeved on the valve seat, and the graphite ring is positioned between the pressure ring and the valve body. Although the slide valve structure described above can improve service life and sealing performance, the problem of fluid entering the valve body when the valve is half-open still exists, affecting stable operation and service life. Utility Model Content

[0004] The purpose of the utility model is to provide a slide plate slag locking valve with tight sealing performance.

[0005] The purpose of the utility model is achieved through such a technical solution, a slide plate lock slag valve, including a valve cover and a valve body, a cylinder is arranged on the valve cover, a valve plate with a valve stem is arranged in the valve body, the upper end of the valve stem is connected to the cylinder; a valve seat is arranged in the valve body, the valve plate is located at the valve seat and cooperates with the valve seat; an inlet sealing structure is arranged between the entrance end of the valve seat and the valve body.

[0006] Among them, an upper cavity, an inlet and outlet cavity and a lower cavity are arranged in the valve body, the valve plate and the valve seat are arranged in the inlet and outlet cavity, the valve stem is arranged in the upper cavity, the upper end of the valve stem passes through the valve body and is connected to the cylinder, and the lower end is connected to the valve plate.

[0007] In order to facilitate the discharge of slag inclusions, the valve plate divides the inlet and outlet chambers into an inlet end and an outlet end. A half-moon hole A and a half-moon hole B are provided in the valve body for connecting the upper chamber with the outlet end and the lower chamber with the outlet end.

[0008] In the present invention, it is further described that the valve seat includes a valve seat body A and a valve seat body B, and the inlet sealing structure is arranged between the valve seat body A and the valve body.

[0009] In which, the inlet sealing structure includes an ash discharge groove arranged in the valve body and opposite to the valve seat body A, a retaining ring is arranged between the valve seat body A and the ash discharge groove, and a butterfly spring A is arranged between the ash discharge groove and the retaining ring; a step is arranged on the outer wall of the end head of the valve seat body A, a sealing gasket is arranged on the step, and the retaining ring is buckled on the step and supports the sealing gasket.

[0010] In order to ensure that the butterfly spring A is not completely crushed and loses its function, a limiting step A is provided on the inner wall of the valve body and corresponds to the buckle A.

[0011] In order to facilitate slag discharge, inclined surfaces are evenly distributed on the end faces of the ash discharge trough corresponding to the butterfly spring A.

[0012] In order to facilitate scraping off the slag on the valve plate, a scraper is provided on the valve seat body A and on the outer edge of the valve plate surface.

[0013] In order to ensure that the butterfly spring B is not completely crushed and loses its function, a butterfly spring B is provided between the valve body and the valve seat body B; a limiting step B is provided on the inner wall of the valve body and corresponding to the valve seat body B.

[0014] In order to facilitate the discharge of slag in the upper and lower chambers, a purge port A communicating with the upper chamber and a purge port B communicating with the lower chamber are respectively provided on the wall of the valve body; a slag discharge hole communicating with the lower chamber is provided on the wall of the valve body and located at the lower end of the valve body.

[0015] Due to the adoption of the above technical solution, the utility model has the advantages of clever structural design, reliable use and low cost. It can not only improve its sealing performance, but also reduce the wear of the slag on the valve body by discharging the slag, thereby increasing the service life and ensuring the stable operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings of the present invention are as follows:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0019] Figure 3 for Figure 1 Middle B part magnified view;

[0020] Figure 4 This is a schematic diagram of the ash discharge chute structure of the present utility model. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. Any improvement or substitution based on the basic spirit of the present embodiment still falls within the scope of protection required by the claims of the present invention.

[0022] Example 1: Figure 1 、 2 As shown in Figure 3, a slide plate lock slag valve includes a valve cover 1 and a valve body 2. A cylinder 3 is provided on the valve cover 1, and a valve plate 5 with a valve stem 4 is provided in the valve body 2, and the upper end of the valve stem 4 is connected to the cylinder 3; a valve seat is provided in the valve body 2, and the valve plate 5 is located at the valve seat and cooperates with the valve seat; an inlet sealing structure is provided between the inlet end of the valve seat and the valve body 2.

[0023] Among them, an upper chamber 6, an inlet and outlet chamber and a lower chamber 7 are provided in the valve body 2, the valve plate 5 and the valve seat are provided in the inlet and outlet chamber, the valve stem 4 is provided in the upper chamber 6, the upper end of the valve stem 4 passes through the valve body 2 and is connected to the cylinder 3, and the lower end is connected to the valve plate 5.

[0024] The present invention further describes that the valve plate 5 divides the inlet and outlet chambers into an inlet end 8 and an outlet end 9. A semi-lunar hole A10 and a semi-lunar hole B11 are provided in the valve body 2 for connecting the upper chamber 6 with the outlet end 9, and the lower chamber 7 with the outlet end 9. Slag in the upper chamber 6 and the lower chamber 7 can be discharged through the semi-lunar hole A10 and the semi-lunar hole B11.

[0025] The valve seat includes a valve seat body A12 and a valve seat body B13 , and the inlet sealing structure is arranged between the valve seat body A12 and the valve body 2 .

[0026] Further description, the inlet sealing structure includes an ash discharge groove 14 arranged in the valve body 2 and opposite to the valve seat body A12, a retaining ring 15 is arranged between the valve seat body A12 and the ash discharge groove 14, and a butterfly spring A16 is arranged between the ash discharge groove 14 and the retaining ring 15; a step is arranged on the outer wall of the end of the valve seat body A12, a sealing gasket 17 is arranged on the step, and the retaining ring 15 is buckled on the step and supports the sealing gasket 17.

[0027] In order to ensure that the butterfly spring A16 is not completely crushed and loses its function, a limiting step A18 is provided on the inner wall of the valve body 2 and corresponds to the retaining ring 15.

[0028] Further, if Figure 4 As shown, the end surface of the ash discharge chute 14 corresponding to the butterfly spring A16 is evenly distributed with inclined surfaces 19. Through the inclined surfaces 19, slag discharge can be carried out more conveniently.

[0029] In the present invention, a scraper 20 is provided on the valve seat body A12 and on the outer edge of the valve plate 5 ; the scraper 20 can be used to conveniently scrape off the residue on the valve plate.

[0030] Furthermore, a disc spring B21 is installed between the valve body 2 and the valve seat body B13. A limiting step B22 is provided on the inner wall of the valve body 2, corresponding to the valve seat body B13. A disc spring B21 is designed at the outlet end to ensure that both the valve seat body A12 and the valve seat body B13 fit snugly against the valve plate 5, preventing damage to the sealing surface of the valve plate 5.

[0031] Furthermore, in order to facilitate the discharge of slag in the upper chamber 6 and the lower chamber 7, a purge port A23 connected to the upper chamber 6 and a purge port B24 connected to the lower chamber 7 are respectively provided on the wall of the valve body 2; a slag discharge hole 25 connected to the lower chamber 7 is provided on the wall of the valve body 2 and located at the lower end of the valve body 2.

[0032] The utility model is designed with a half-moon hole A10 and a half-moon hole B11 for slag discharge; when the valve is half-open, during the process of medium being lowered, the accumulated slag in the upper chamber 6 will be purged by the medium pressure and discharged from the half-moon hole A10, ensuring that the upper chamber 6 is not accumulated with slag; as time accumulates, it is inevitable that a small amount of slag will accumulate in the upper chamber 6 and the lower chamber 7. High-pressure clean water is regularly introduced through the purge port A23 and the purge port B24 to discharge the accumulated slag out of the valve body or discharge it downstream of the valve body.

[0033] This utility model seals the inlet end. The medium pressure enters the flow channel at the inlet end 8, and this pressure pushes the butterfly spring A16, retaining ring 15, and valve seat body A12 onto the valve plate 5, thus achieving a seal at the inlet end 8. The sealing surface between the valve seat body B13 and the valve plate 5 does not have a sealing effect, but is mainly used to support the valve plate to ensure a smooth surface. Of course, the outlet end 9 can also be sealed. The outlet end 9 is sealed by the valve plate 5 counter-pressing the valve seat body A12, retaining ring 15, butterfly spring A16 at the inlet end 8 until there is no room for escape at the limit step A18. At this point, the inlet end 8 is sealed, and the outlet end 9 is also sealed.

[0034] In the present invention, the inlet end 8 and the outlet end 9 adopt straight flow channels, and the medium flow direction is perpendicular to the opening and closing direction of the valve plate 5. During the opening and closing process, the valve plate 5 and the valve seat always maintain a close fit and sliding, forming a powerful self-cleaning and shearing function, directly shearing off particles and scaling, without worrying about particles damaging the sealing surface of the valve seat. Even if large agglomerated particles hinder opening and closing, this valve only needs to directly increase the thrust shear.

Claims

1. A slide-type slag lock valve, comprising a valve cover (1) and a valve body (2), wherein a cylinder (3) is provided on the valve cover (1), and wherein: A valve plate (5) with a valve stem (4) is provided in the valve body (2), and the upper end of the valve stem (4) is connected to the cylinder (3); a valve seat is provided in the valve body (2), and the valve plate (5) is located at the valve seat and cooperates with the valve seat; an inlet sealing structure is provided between the inlet end of the valve seat and the valve body (2).

2. The slide-type slag lock valve according to claim 1, characterized in that: An upper chamber (6), an inlet and outlet chamber, and a lower chamber (7) are provided in the valve body (2); the valve plate (5) and the valve seat are provided in the inlet and outlet chamber; the valve stem (4) is provided in the upper chamber (6); the upper end of the valve stem (4) passes through the valve body (2) and is connected to the cylinder (3); and the lower end is connected to the valve plate (5).

3. The slide-type slag lock valve according to claim 2, characterized in that: The valve plate (5) divides the inlet and outlet chambers into an inlet end (8) and an outlet end (9), and a half-moon hole A (10) and a half-moon hole B (11) are provided in the valve body (2) for connecting the upper chamber (6) and the outlet end (9), and the lower chamber (7) and the outlet end (9).

4. The slide-type slag lock valve according to claim 3, characterized in that: The valve seat comprises a valve seat body A (12) and a valve seat body B (13), and the inlet sealing structure is arranged between the valve seat body A (12) and the valve body (2).

5. The slide-type slag lock valve according to claim 4, characterized in that: The inlet sealing structure includes an ash discharge groove (14) arranged in the valve body (2) and opposite to the valve seat body A (12), a retaining ring (15) is arranged between the valve seat body A (12) and the ash discharge groove (14), and a butterfly spring A (16) is arranged between the ash discharge groove (14) and the retaining ring (15); a step is arranged on the outer wall of the end of the valve seat body A (12), a sealing gasket (17) is arranged on the step, and the retaining ring (15) is buckled on the step and supports the sealing gasket (17).

6. The slide-type slag lock valve according to claim 5, characterized in that: A limiting step A (18) is provided on the inner wall of the valve body (2) and corresponds to the buckle (15).

7. The slide slag lock valve according to claim 6, characterized in that: The end surface of the ash discharge trough (14) corresponding to the butterfly spring A (16) is uniformly provided with inclined surfaces (19).

8. The slide-type slag lock valve according to claim 7, characterized in that: A scraper (20) is provided on the outer edge of the valve seat body A (12) and corresponding to the surface of the valve plate (5).

9. The slide-type slag lock valve according to claim 8, characterized in that: A butterfly spring B (21) is provided between the valve body (2) and the valve seat body B (13); and a limiting step B (22) is provided on the inner wall of the valve body (2) and corresponding to the valve seat body B (13).

10. The slide-type slag lock valve according to claim 9, characterized in that: A purge port A (23) communicating with the upper chamber (6) and a purge port B (24) communicating with the lower chamber (7) are respectively provided on the wall of the valve body (2); and a slag discharge hole (25) communicating with the lower chamber (7) is provided on the wall of the valve body (2) and located at the lower end of the valve body (2).

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