A self-sealing slurry valve
By introducing a rigid support ring and centering plate structure into the slurry valve, combined with the design of buffer groove and buffer ring, the problems of difficult gate opening, severe wear and poor centering are solved, achieving efficient opening and closing and long-life self-sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAIDUN SPECIAL VALVE CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-30
AI Technical Summary
Existing slurry valves suffer from problems such as increased difficulty in opening the gate, severe wear, poor alignment, and blockage during use, which prevent the valves from opening and closing normally.
A self-sealing slurry valve is designed, which adopts a rigid support ring and centering plate structure. The gate moves linearly relative to the centering plate to scrape the material. The buffer groove and buffer ring reduce friction and ensure the centering of the gate and valve body. The limiting part and deformation groove are used to improve the sealing performance.
It enables timely cleaning of the gate surface, reduces wear, maintains high gate opening and closing efficiency, extends valve seat life, ensures gate stability and smooth movement, and avoids deviation.
Smart Images
Figure CN224433459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of slurry valve technology, and more specifically to a self-sealing slurry valve. Background Technology
[0002] Currently, the media used in mine valves typically contain high concentrations of high-hardness solid particles, such as ore, tailings, coal slurry, and ash. During use, particle deposition and blockage can easily cause difficulties in opening and closing the gate valve, or even jamming it. A Chinese patent with publication number CN202017778U discloses a soft-seal slurry valve. It uses a soft material for the valve seat, allowing two valve seats to fit together to ensure that the medium is isolated in the flow channel when the valve is open. While this design solves the problem of particle deposition and blockage, it still has drawbacks. Firstly, the soft valve seat... The solid particles adhering to the gate are poorly scraped off, and the gate becomes heavy due to long-term media accumulation, increasing the difficulty of opening. At the same time, as the gate thickens, it forces the soft valve seat to deform more severely, which increases the clamping force on the gate and further increases the difficulty of opening the gate. It also accelerates the wear of the soft valve seat, making the valve seat prone to damage. Secondly, after long-term use, the elastic coefficients of the two valve seats will differ, and the amount of media accumulated on both sides of the gate will also differ. The gate will shift relative to the center of the valve body, resulting in poor centering. This will cause the subsequent gate to be unable to pass between the two valve seats at the bottom of the valve body, and the valve will not be able to close completely. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a self-sealing slurry valve that can clean the surface of the gate and ensure stable alignment between the gate and the valve body.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a self-sealing slurry valve, comprising a valve body, two flexible valve seats that can fit together, and a gate plate that can pass through the two valve seats. Both valve seats have built-in rigid support rings. The valve body is provided with an insertion chamber whose height is greater than that of the valve seats and allows the gate plate to pass through. The insertion chamber is provided with two centering plates located on both sides of the gate plate and which can fit tightly against the gate plate. By the gate plate moving linearly relative to the two centering plates, the two centering plates can scrape material from both sides of the gate plate.
[0005] As a further improvement of this utility model, the interlocking chamber includes a neck that is lower than the height of the centering plate and a receiving portion located below the neck and having a width greater than the width of the neck.
[0006] As a further improvement of this utility model, both valve seats include a plate sealing part that can fit against each other, a pipe sealing part that can form a seal with an external pipe, and a limiting part located on the outer wall of the pipe sealing part and fitting against the end face of the valve body. Both pipe sealing parts are provided with a buffer groove coaxial with the pipe sealing part. The opening of the buffer groove is located on the end face of the pipe sealing part away from the plate sealing part. A buffer ring with an elastic coefficient smaller than that of the pipe sealing part is provided in the buffer groove.
[0007] As a further improvement of this utility model, the depth of the buffer groove is greater than the length of the corresponding buffer ring.
[0008] As a further improvement of this utility model, both of the tube sealing parts are equipped with a rigid reinforcing ring.
[0009] As a further improvement of this utility model, the opposing end faces of the two plate sealing portions both bulge towards the center of the valve body.
[0010] As a further improvement of this utility model, deformation grooves are provided on the inner walls of both of the plate sealing parts.
[0011] The beneficial effects of this utility model are as follows: By moving the gate plate linearly relative to the two centering plates, the two centering plates can scrape the material on both sides of the gate plate. Compared with the prior art, this design can scrape the surface of the gate plate in a timely manner, avoiding the phenomenon of medium or solid particles adhering to the gate plate for a long time, ensuring that the mass of the gate plate tends to be constant, the required driving force is constant, the opening and closing efficiency of the gate plate is high, and the surface of the gate plate remains smooth, effectively reducing the wear of the valve seat and extending the service life of the valve seat. The thickness of the gate plate remains constant, and the deformation generated by the two valve seats when clamping the gate plate tends to be the same. The forces on both sides of the gate plate are the same, keeping it in a vertical state, which indirectly improves the structural stability of the gate plate. Furthermore, the design that both centering plates are in contact with the top of the gate plate can ensure that the gate plate remains in a vertical state and cannot be offset relative to the center of the valve body, which is conducive to the smooth up and down movement of the gate plate and the smooth insertion of the gate plate between the two valve seats. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0014] Figure 3 for Figure 2 A diagram showing the state when the gate is inserted between two valve seats;
[0015] Figure 4 for Figure 2 A diagram showing the state of the valve body when an external pipeline is connected to one side.
[0016] Reference numerals: 1. Valve body; 2. Valve seat; 21. Plate seal; 22. Pipe seal; 23. Limiting part; 24. Buffer groove; 25. Buffer ring; 26. Reinforcing ring; 27. Deformation groove; 3. Gate; 4. Support ring; 5. Insertion chamber; 51. Neck; 52. Receiving part; 6. Centering plate. Detailed Implementation
[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.
[0018] Reference Figures 1 to 4 As shown, a self-sealing slurry valve of this embodiment includes a valve body 1, two flexible valve seats 2 that can fit together, and a gate 3 that can pass through the two valve seats 2. Both valve seats 2 have a built-in rigid support ring 4. The valve body 1 is provided with an insertion chamber 5 whose height is greater than the height of the valve seats 2 and through which the gate 3 passes. Both valve seats 2 include a plate sealing part 21 that can fit together and a pipe sealing part 22 that can form a seal with an external pipeline. The plate sealing part 21 and the pipe sealing part 22 are integrally formed and the outer diameter of the plate sealing part 21 is smaller than the outer diameter of the pipe sealing part 22. The support ring 4 is located inside the plate sealing part 21 and adjacent to the pipe sealing part 22. The width of the insertion chamber 5 is greater than the thickness of the gate 3.
[0019] Based on the aforementioned prior art, the valve body 1 is composed of two identical half valve bodies joined together. On the opposing surfaces of the two half valve bodies, there are opposing centering plates 6. Both centering plates 6 are located in the insertion chamber 5. The gap width between the two centering plates 6 matches the thickness of the gate plate 3.
[0020] Initially, the two valve seats 2 are tightly fitted together, and the medium flows only within the inner cavities of the two valve seats 2. The gate 3 is partially located within the insertion chamber 5, and the two centering plates 6 are tightly fitted together with the gate 3. During valve closing, the gate 3 moves vertically downwards, and its tip inserts between the two valve seats 2. Both valve seats 2 undergo elastic deformation and slide relative to the gate 3 until the gate 3 moves downwards into position, separating the two valve seats 2 and tightly fitting together with the sides of the gate 3. During valve opening, the gate 3 moves upwards in a straight line. As the gate 3 gradually moves out from between the two valve seats 2, the parts of the two valve seats 2 that are not blocked by the gate 3 promptly recover their elastic deformation and come into contact with each other. While the gate 3 moves upward relative to the center plate 6, the center plate 6 scrapes off the surface of the gate 3. The medium or solid particles adhering to the surface of the gate 3 are scraped off. The medium or solid particles fall onto the outer wall of the valve seat 2 under the action of gravity and move along the periphery of the valve seat 2 to the drain groove at the bottom of the valve body 1 until the tip of the gate 3 disengages from the valve seat 2 and stops in the insertion chamber 5. The two valve seats 2 return to their initial state.
[0021] Compared with existing technologies, this design can scrape the surface of the gate 3 in a timely manner, avoiding the phenomenon of medium or solid particles adhering to the gate 3 for a long time, ensuring that the mass of the gate 3 tends to be constant, the required driving force is constant, the opening and closing efficiency of the gate 3 is high, and the surface of the gate 3 remains smooth, effectively reducing the wear of the valve seat 2 and extending the service life of the valve seat 2. The thickness of the gate 3 remains constant, and the deformation generated by the two valve seats 2 when clamping the gate 3 tends to be the same. The forces on both sides of the gate 3 are the same, keeping it in a vertical state, which indirectly improves the structural stability of the gate 3. Furthermore, the design that both centering plates 6 are in contact with the top of the gate 3 can ensure that the gate 3 remains in a vertical state and cannot be offset relative to the center of the valve body 1, which is conducive to the smooth up and down movement of the gate 3 and the smooth insertion of the gate 3 between the two valve seats 2.
[0022] As an improved specific implementation, because the width of the insertion chamber 5 is slightly larger than the thickness of the gate plate 3, there is a possibility that the scraped-off medium or solid particles may not leave the insertion chamber 5 in time and become stuck between the insertion chamber 5 and the gate plate 3. This reduces the scraping efficiency of the centering plate 6 on the gate plate 3 and increases the difficulty of the gate plate 3 moving relative to the insertion chamber 5. To solve the aforementioned problems, refer to Figures 2 to 4 As shown, the insertion chamber 5 includes a neck 51 at a height lower than that of the centering plate 6 and a receiving portion 52 located below the neck 51 and wider than the neck 51. The medium or solid particles scraped off the gate 3 pass through the neck 51 into the receiving portion 52, and then move along the peripheral wall of the valve seat 2 to the bottom of the valve body 1. The design of the receiving portion 52 increases the local space of the insertion chamber 5 and reduces the length of the neck 51, effectively ensuring that the scraped medium or solid particles can pass through the neck 51 in time and enter the receiving portion 52, avoiding the phenomenon of medium or solid particles getting stuck between the insertion chamber 5 and the gate 3, and ensuring the smooth movement of the gate 3. Furthermore, when the gate 3 exits the two valve seats 2, a small amount of medium will inevitably be carried into the receiving portion 52. The large space of the receiving portion 52 can prevent the medium from overflowing into the neck 51, reduce the possibility of the neck 51 being blocked, and at the same time facilitate the medium to flow along the outer wall of the valve seat 2 to the bottom of the valve body 1.
[0023] As an improved specific implementation, in the prior art, when external pipes are connected to both sides of the valve body 1, the pipe seal 22 is tightly fitted with the pipe end face to form a soft seal. The pipe seal 22 is squeezed by the pipe, causing the valve seat 2 to undergo elastic deformation as a whole. The two pipes squeeze the two valve seats 2 towards each other, which increases the tightness between the two valve seats 2, increases the difficulty of the gate 3 inserting between the two valve seats 2 and sliding relative to the two valve seats 2, and aggravates the wear of the valve seats 2. To solve the aforementioned problems, refer to Figure 2 and Figure 4As shown, a limiting deformation part 23 is integrally formed on the peripheral wall of the pipe seal part 22 outside the valve body 1. The limiting deformation part 23 is annular. A buffer groove 24 is machined into the pipe seal part 22 on the end face of the pipe seal part 22 that fits against the pipe. The buffer groove 24 is annular and coaxial with the pipe seal part 22. A buffer ring 25 with an elastic coefficient smaller than that of the pipe seal part 22 is inserted into the buffer groove 24. Therefore, the buffer ring 25 is more prone to deformation than the pipe seal part 22. The cross-sections of the buffer groove 24 and the buffer ring 25 in the circumferential direction are both T-shaped. The end faces of existing pipes are mostly uneven and have protruding rings. During the assembly of the valve body 1 and the pipe, the end faces of the limiting deformation part 23 and the pipe seal part 22 fit against the end face of the pipe. The limiting deformation part 23 is clamped between the valve body 1 and the pipe. The design of the limiting part 23 restricts the pipe from further compressing the pipe seal 22. The convex ring on the pipe end face exerts a thrust on the buffer ring 25, causing the buffer ring 25 to undergo significant elastic deformation. The part of the pipe seal 22 located around the buffer ring 25 undergoes slight elastic deformation. The design of the limiting part 23 can reduce the overall deformation of the valve seat 2, thereby reducing the tightness between the two valve seats 2. At the same time, it reduces the difficulty of inserting the gate 3 between the two valve seats 2 and reduces the friction force generated by the valve seat 2 on the gate 3, thus improving the opening and closing efficiency of the gate 3. The design of inserting the buffer ring 25 into the pipe seal 22 is more adaptable to the pipe end face structure. At the same time, the buffer ring 25 replaces the pipe seal 22 which is subjected to local compression and deformation by the pipe, further reducing the deformation of the valve seat 2 and facilitating the opening and closing of the gate 3.
[0024] As one specific implementation method of the improvement, refer to Figures 2 to 4 As shown, the depth of the buffer groove 24 is greater than the length of the corresponding buffer ring 25. In the initial state, there is a gap between the bottom of the buffer groove 24 and the buffer ring 25. When the buffer ring 25 is deformed under force, the gap between the buffer ring 25 and the bottom of the buffer groove 24 decreases. Compared with the design where the buffer groove 24 and the buffer ring 25 are matched, this design can further reduce the degree of deformation of the valve seat 2 when the buffer ring 25 is subjected to thrust, and indirectly improve the efficiency of the gate 3 moving relative to the valve seat 2.
[0025] As one specific implementation method of the improvement, refer to Figures 2 to 4As shown, a reinforcing groove connected to the buffer groove 24 is machined inside the pipe seal 22. There can be two reinforcing grooves, which are located on two opposing groove walls of the buffer groove 24. Before the valve seat 2 is installed into the valve body 1, the opening of the buffer groove 24 is opened to make the pipe seal 22 elastically deform. Then, two reinforcing rings 26 of different specifications are installed in the two reinforcing grooves respectively, and the opening force on the pipe seal 22 is removed. The pipe seal 22 returns to elastic deformation, and the reinforcing rings 26 are confined inside the pipe seal 22. The gap between the two reinforcing rings 26 allows the buffer ring 25 to pass through. The design of the reinforcing rings 26 can not only act as the skeleton of the pipe seal 22 to improve the structural stability of the pipe seal 22 and the connection stability of the pipe seal 22 at the port of the valve body 1, but also provide guidance for the movement and deformation of the buffer ring 25, ensuring that the buffer ring 25 can move and deform along its length direction, thus improving the deformation efficiency of the buffer ring 25.
[0026] As one specific implementation method of the improvement, refer to Figure 2 and Figure 3 As shown, the opposing end faces of the two plate seals 21 both bulge towards the center of the valve body 1. Compared with the existing technology where the opposing end faces of the two plate seals 21 bulge towards the inner wall of the valve body 1, this design can greatly reduce the possibility that the medium will push the two opposing plate seals 21 apart and flow to the outside of the valve seat 2, ensuring that the medium flows in the inner cavity of the valve seat 2. At the same time, during the process of the medium flowing along the axial direction of the valve seat 2, the medium exerts a thrust on the protrusion of one of the plate seals 21, further improving the fit between the two plate seals 21 and preventing the medium from leaking out.
[0027] As one specific implementation method of the improvement, refer to Figure 2 and Figure 3 As shown, deformation grooves 23 are provided on the inner walls of both plate seals 21. The deformation grooves 23 are close to the part of the plate seal 21 that protrudes towards the center of the valve body 1. During the process of the gate 3 being inserted between the two plate seals 21, the part of the plate seal 21 that protrudes towards the center of the valve body 1 is easy to bend elastically relative to the deformation grooves 23. At the same time, the design of the deformation grooves 23 can also increase the local inner diameter of the plate seal 21, making the part of the plate seal 21 that protrudes towards the center of the valve body 1 appear to be more prominent. During the process of the medium flowing along the axial direction of the valve seat 2, the medium can more effectively generate thrust on the part of one of the plate seals 21 that protrudes towards the center of the valve body 1, thereby improving the sealing performance between the two plate seals 21.
[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A self-sealing mineral pulp valve, comprising a valve body (1), two mutually abutting and soft valve seats (2) and a shutter (3) capable of penetrating between the two valve seats (2), both of the valve seats (2) being internally provided with a hard supporting ring (4), the valve body (1) being provided with a penetration chamber (5) having a height greater than that of the valve seats (2) and being penetrated by the shutter (3), characterized in that: The insertion chamber (5) is provided with two centering plates (6) located on both sides of the gate (3) and both of them can be in close contact with the gate (3). The gate (3) moves linearly relative to the two centering plates (6) so that the two centering plates (6) can scrape the material on both sides of the gate (3). 2. The self-sealing slurry valve according to claim 1, characterized in that: The insertion chamber (5) includes a neck (51) at a height lower than that of the centering plate (6) and a receiving portion (52) located below the neck (51) and wider than the neck (51).
3. A self-sealing slurry valve according to claim 1 or 2, characterized in that: Both valve seats (2) include a plate seal (21) that can fit together, a pipe seal (22) that can form a seal with an external pipe, and a limiting part (23) located on the outer wall of the pipe seal (22) and fitting with the end face of the valve body (1). Both pipe seals (22) are provided with a buffer groove (24) coaxial with the pipe seal (22). The opening of the buffer groove (24) is located on the end face of the pipe seal (22) away from the plate seal (21). A buffer ring (25) with an elastic coefficient smaller than that of the pipe seal (22) is provided in the buffer groove (24).
4. A self-sealing slurry valve according to claim 3, characterized in that: The depth of the buffer groove (24) is greater than the length of the corresponding buffer ring (25).
5. A self-sealing slurry valve according to claim 3, characterized in that: Both of the tube seals (22) have a built-in rigid reinforcing ring (26).
6. A self-sealing slurry valve according to claim 3, characterized in that: The two facing end faces of the plate seals (21) both bulge toward the center of the valve body (1).
7. A self-sealing slurry valve according to claim 6, characterized in that: Deformation grooves (27) are provided on the inner walls of both of the plate sealing parts (21).