A valve seal structure

Abstract

The utility model relates to a valve sealing structure, including the valve body, set up liftable valve plate in the valve body, the bottom of valve body is equipped with the passageway no.

Description

Technical Field

[0001] This utility model relates to a valve sealing structure and belongs to the field of slurry valve technology. Background Technology

[0002] The three-plate through-type slurry valve is an ideal valve for medium and high-pressure slurry transportation. It can be widely used in pipelines conveying fine particulate materials in industries such as mining, metallurgy, coal, power plants, and chemicals. This valve is generally used to open or close pipelines. However, existing three-plate through-type slurry valves have poor sealing performance, and water and slurry leakage is prone to occur at the contact point between the valve plate and the sealing ring.

[0003] Chinese patent CN212318830U discloses a three-piece, three-seal slurry valve, including a valve body, a gate, and a pivot pin. A metal valve seat is installed at the bottom center of the valve body, and a spring is tightly attached to one side of the metal valve seat. A sealing strip is inserted into the inside of the metal valve seat, and a soft valve seat is installed above the metal valve seat. The gate is inserted into the middle of the valve body, and bolts are installed on both sides of the gate, thus forming a three-seal structure with two hard and one soft parts. However, its structure is relatively complex and maintenance is not simple. If the spring fails, it will affect the raising and lowering of the valve plate, which is not conducive to opening and closing the valve. Utility Model Content

[0004] To overcome the above problems, this utility model provides a valve sealing structure that can keep the sealing ring pressed against the valve plate during the valve plate's lifting and lowering process, and avoid affecting the lifting and lowering of the valve plate.

[0005] The technical solution of this utility model is as follows: A valve sealing structure includes a valve body and a liftable valve plate disposed within the valve body. The bottom of the valve body has a channel for the valve plate to move up and down, with the lower part of the valve plate extending out of the valve body through the channel. A sealing seat is welded to the bottom of the channel, and a sealing ring is installed at the other end of the sealing seat. A sealing cap is provided at the other end of the sealing ring to press it against the sealing seat. The valve plate passes through the sealing seat, sealing ring, and sealing cap during movement. The sealing seat covers the gap between the valve plate and the channel. The sealing ring surrounds and fits the outer periphery of the valve plate. A second groove is formed on the top surface of the sealing ring, communicating with the channel through the sealing seat. A pressure-applying structure is provided within the second groove. Medium collected in the second groove via the channel applies pressure to the sealing ring through the pressure-applying structure, causing the sealing ring to press tightly against the outer periphery of the valve plate during movement.

[0006] Furthermore, the sealing seat has a vertical through hole in the middle, and the valve plate moves up and down within the through hole. The inner wall of the through hole is close to the outer periphery of the valve plate.

[0007] Furthermore, the sealing ring has a vertical through hole II in the middle, and the valve plate moves up and down within the through hole II, with the inner wall of the through hole II fitting against the outer periphery of the valve plate.

[0008] Furthermore, the pressure-applying structure is a pressure-applying slope; the inner side of the second groove is inclined away from the valve plate to form a pressure-applying slope.

[0009] Furthermore, the pressure-applying structure consists of two pressure-applying inclined surfaces; the cross-section of the second groove is V-shaped, with both its inner and outer edges forming pressure-applying inclined surfaces.

[0010] Furthermore, the lower part of the inner wall of the channel is recessed to form a groove, which is connected to the bottom surface of the sealing seat, and the sealing ring is embedded in the groove.

[0011] Furthermore, the top of the sealing seat is provided with a flow guiding channel corresponding to the position of the second groove. One end of the flow guiding channel is connected to the second groove, and the other end of the flow guiding channel is connected to the gap between the first channel and the valve plate.

[0012] Furthermore, the sealing cover has a vertical through hole three in the middle; the width of the sealing cover is greater than the width of the sealing ring, and the sealing cover presses the sealing ring and the sealing seat together with several bolts.

[0013] Furthermore, a plurality of bolts are spaced apart on the outer periphery of the sealing ring; the bottom of the sealing seat is provided with threaded holes corresponding to the positions of the plurality of bolts; each bolt passes through the sealing cover and is threadedly locked to the adjacent threaded hole. Furthermore, the through hole one, the through hole two, and the through hole three are positioned opposite each other and are interconnected, forming a channel two for the valve plate to move up and down. Channel two connects the channel one to the outside of the valve body.

[0014] This utility model has the following beneficial effects: 1. This utility model has a sealing seat, a sealing ring, and a sealing cover arranged sequentially at the bottom of the first channel. A second channel is formed by a through hole in the middle of the sealing seat, sealing ring, and sealing cover to provide space for the valve plate to move up and down. At the same time, a pressure-applying structure is used to apply pressure to the sealing ring arranged around the valve plate, so that the sealing ring remains in close contact with the valve plate during the valve plate's movement, preventing the medium from flowing out of the valve body and causing leakage of slurry or water. The structure is simple and easy to maintain and replace later.

[0015] 2. This utility model applies pressure to the sealing ring by setting a groove with a pressure-applying slope. The gravity generated by the medium collected in the groove ensures that even if the elastic sealing ring is tightly attached to the valve plate, it does not affect the valve plate's lifting and lowering. It also compresses the gap between the sealing ring and the sealing seat, achieving a double sealing effect.

[0016] 3. This utility model uses a sealing seat located between the sealing ring and the valve body to cover the gap between the channel one and the valve plate, thereby reducing the medium flow rate. At the same time, a guide channel with a width smaller than the gap and the groove two is provided on the sealing seat to further slow down and reduce the medium flow rate, and also to isolate the medium and prevent the rising and falling valve plate from stirring the medium in the groove two, thus affecting the pressure application effect. The sealing cover covers the gap between the sealing ring and the sealing seat to prevent the medium from flowing out from the gap. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 Enlarged view of point A.

[0019] Figure 3 This is a schematic diagram of the sealing seat.

[0020] Figure 4 This is a schematic diagram of the sealing ring.

[0021] Figure 5 This is a schematic diagram of the sealing cap.

[0022] The reference numerals in the figure are as follows: 1. Valve body; 11. Channel 1; 2. Valve plate; 3. Sealing seat; 31. Through hole 1; 32. Groove 1; 33. Flow guide channel; 34. Bolt; 35. Screw hole; 4. Sealing ring; 41. Groove 2; 42. Through hole 2; 5. Sealing cover; 51. Through hole 3. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] See Figure 1-5 A valve sealing structure includes a valve body 1, with a channel 11 at the bottom of the valve body 1 connecting the interior of the valve body 1 to the outside. A liftable valve plate 2 is provided inside the valve body 1, with the lower part of the valve plate 2 extending to the outside of the valve body 1 through the channel 11. The liftable valve plate 2 cooperates with the channel 11 to control the opening and closing of the valve.

[0025] Furthermore, a sealing seat 3 is welded to the bottom of channel 11, and a sealing ring 4 is provided at the other end of the sealing seat 3. A sealing cover 5 is provided at the other end of the sealing ring 4. The sealing cover 5 presses the sealing ring 4 and the sealing seat 3 together to enhance the sealing effect of the sealing ring 4. Vertical through holes are opened in the middle of the sealing seat 3, the sealing ring 4 and the sealing cover 5 respectively, forming channel 2. Channel 2 is adapted to the shape of valve plate 2. The through holes on the sealing seat 3, the sealing ring 4 and the sealing cover 5 correspond to each other and form channel 2. Channel 2 connects channel 11 to the outside of valve body 1, providing space for valve plate 2 to move up and down.

[0026] Furthermore, the upper end face of the sealing seat 3 is fitted to the bottom of the channel 11, and the width of the through hole 31 opened in the middle of the sealing seat 3 is smaller than the width of the channel 11. Preferably, the inner wall of the through hole 31 is fitted close to the outer surface of the valve plate 2 to avoid wear with the rising and falling valve plate 2, while covering the gap between the channel 11 and the valve plate 2 to reduce the amount of medium flowing out of the valve body 1.

[0027] Furthermore, the lower part of the inner wall of channel 11 is recessed to form a groove 32 that communicates with the bottom surface of the sealing seat 3. A sealing ring 4 is embedded in the groove 32. The through hole 42 in the middle of the sealing ring 4 is fitted with the outer periphery of the valve plate 2 on its inner wall, further reducing the gap for medium outflow.

[0028] To ensure that the sealing ring 4 maintains a good sealing effect during the lifting and lowering of the valve plate 2, the sealing ring 4 is an elastic sealing ring. The end face of the sealing ring 4 near the first channel 11 is recessed to form a second groove 41, which surrounds the valve plate 2. A guide channel 33 is opened at the top of the sealing seat 3 and communicates with the second groove 41. The guide channel 33 can be arranged around the valve plate 2. The other end of the guide channel 33 is connected to the gap between the first channel 11 and the valve plate 2. The width of the guide channel 33 is smaller than the width of the gap and smaller than the width of the second groove 41, thereby preventing a large amount of medium from flowing into the second groove 41 quickly, or from agitating the medium during the lifting and lowering of the valve plate 2, which would affect the pressure application effect.

[0029] Furthermore, the inner side of the second groove 41 is inclined away from the valve plate 2. After the medium is slowed down and reduced in volume through the guide channel 33, it gathers in the second groove 41 and is pressured by the inclined inner side, so that the inner wall of the second through hole 42 always stays in close contact with the valve plate 2 during the lifting and lowering process, preventing the sealing ring 4 from gapping with the outer periphery of the valve plate 2 and causing the medium to flow out, while not affecting the lifting and lowering of the valve plate 2 and maintaining the sealing effect.

[0030] Furthermore, the outer side of the second groove 41 can also be inclined, that is, the second groove 41 has a V-shaped cross-section, and both its inner and outer sides form pressure-applying slopes. The medium collected in the second groove 41 is pressed by the inner side to make the inner wall of the first channel 11 fit tightly against the valve plate 2, and by the outer side to make the sealing ring 4 fit tightly against the first groove 32. In order to further improve the sealing effect, the width of the sealing cover 5 is greater than the width of the sealing ring 4, and at the same time, it covers the gap between the sealing ring 4 and the first groove 32 to prevent the medium from flowing to the outside through the gap.

[0031] Furthermore, the through hole 3 51 in the middle of the sealing cover 5 is set close to the valve plate 2 on its inner wall, so as not to affect the lifting and moving of the valve plate 2; a number of bolts 34 are arranged at intervals on the outer periphery of the sealing ring 4, and a number of threaded holes 35 corresponding to the positions of the bolts 34 are opened at the bottom of the sealing seat 3. After each bolt 34 passes through the sealing cover 5, it is threaded and locked with the adjacent threaded hole 35, pressing the sealing ring 4 into the groove 2 41, thereby enhancing the sealing effect between the sealing seat 3, the sealing ring 4, and the sealing cover 5.

[0032] The working principle of this utility model: See Figure 1-5 The medium flowing in channel 11 is slowed down and reduced in volume by gravity through guide channel 33 and then collects in groove 41. The inner and outer sides of groove 41 apply pressure to the sealing ring 4. The inner side under pressure keeps the through hole 42 and the outer periphery of valve plate 2 pressed together, while the outer side under pressure keeps the sealing ring 4 and groove 32 pressed together, preventing the medium from flowing out from the gap between sealing ring 4 and valve plate 2, and the gap between sealing ring 4 and sealing seat 3.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A valve sealing structure, comprising a valve body (1) and a liftable valve plate (2) disposed within the valve body (1); wherein the bottom of the valve body (1) is provided with a channel (11) for the valve plate (2) to move up and down, and the lower part of the valve plate (2) extends out of the valve body (1) through the channel (11), characterized in that: The bottom of the first channel (11) is welded with a sealing seat (3), and a sealing ring (4) is installed at the other end of the sealing seat (3). The other end of the sealing ring (4) is provided with a sealing cover (5) that presses it against the sealing seat (3). When the valve plate (2) rises and falls, it passes through the sealing seat (3), the sealing ring (4), and the sealing cover (5). The sealing seat (3) covers the gap between the valve plate (2) and the first channel (11). The sealing ring (4) is arranged around and fits the outer periphery of the valve plate (2). The top surface of the sealing ring (4) is provided with a groove (41). The groove (41) is connected to the first channel (11) through the sealing seat (3). The groove (41) is provided with a pressure structure. The medium collected in the groove (41) through the first channel (11) applies pressure to the sealing ring (4) through the pressure structure, so that the sealing ring (4) is pressed against its outer periphery during the rise and fall of the valve plate (2).

2. A valve seal as claimed in claim 1, wherein: The sealing seat (3) has a vertical through hole (31) in the middle. The valve plate (2) moves up and down in the through hole (31). The inner wall of the through hole (31) is close to the outer periphery of the valve plate (2).

3. A valve seal as claimed in claim 2, wherein: The sealing ring (4) has a vertical through hole (42) in the middle. The valve plate (2) moves up and down in the through hole (42). The inner wall of the through hole (42) is attached to the outer periphery of the valve plate (2).

4. A valve seal according to claim 3, wherein: The pressure-applying structure is a pressure-applying slope; the inner side of the groove 2 (41) is inclined away from the valve plate (2) to form a pressure-applying slope.

5. The valve seal of claim 3, wherein: The pressure-applying structure consists of two pressure-applying inclined surfaces; the cross-section of the second groove (41) is V-shaped, and both its inner and outer sides form pressure-applying inclined surfaces.

6. A valve seal according to claim 4 or 5, wherein: The lower part of the inner wall of the channel (11) is recessed to form a groove (32), which is connected to the bottom surface of the sealing seat (3), and the sealing ring (4) is embedded in the groove (32).

7. A valve sealing structure according to claim 6, characterized in that: The top of the sealing seat (3) is provided with a flow channel (33) corresponding to the position of the second groove (41). One end of the flow channel (33) is connected to the second groove (41), and the other end of the flow channel (33) is connected to the gap between the first channel (11) and the valve plate (2).

8. A valve seal according to claim 7, wherein: The sealing cover (5) has a vertical through hole (51) in the middle; the width of the sealing cover (5) is greater than the width of the sealing ring (4), and the sealing cover (5) presses the sealing ring (4) and the sealing seat (3) together by several bolts (34).

9. A valve seal as claimed in claim 8, wherein: The sealing ring (4) is provided with a number of bolts (34) spaced apart on its outer periphery; the bottom of the sealing seat (3) is provided with screw holes (35) corresponding to the positions of the bolts (34); each bolt (34) passes through the sealing cover (5) and is threadedly locked with the adjacent screw hole (35).

10. A valve seal structure according to claim 9, wherein: The through hole one (31), the through hole two (42), and the through hole three (51) are positioned opposite each other and are interconnected, forming a channel two for the valve plate (2) to move up and down. The channel two connects the channel one (11) to the outside of the valve body (1).

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