Butterfly valve with automatic sealing adjustment

Abstract

The utility model relates to a butterfly valve with automatic sealing adjustment has the valve seat, the valve seat has the hollow space, and the valve seat forms the inner wall and the outer wall through the hollow space, is rotatory with the valve plate in the hollow space of valve seat, still is equipped with the drive arrangement on the valve seat, and the valve plate forms the closure or open through the drive of drive arrangement to the hollow space, the valve seat has the front and the back, is equipped with the access groove on the front of valve seat, and the access groove sets up from the front of valve seat to the back of valve seat extension, still is equipped with a plurality of connecting channels, and one end of connecting channel communicates with the access groove, and the other end of connecting channel communicates with the hollow space and sets up, the inner wall of valve seat is fixed with the coaxial arrangement of sealing ring, the outer wall of sealing ring acts on one end of connecting channel and hollow space communication, and the valve plate forms the adhesion or separation with the inner wall of sealing ring through the drive of drive arrangement, the utility model can utilize the pressure size of liquid to adjust the sealing between valve plate and valve seat, makes the sealing more closely.

Description

Technical Field

[0001] This utility model relates to a butterfly valve with automatic sealing adjustment. Background Technology

[0002] Butterfly valves, as a common fluid control device, are widely used in various industrial pipeline systems due to their simple structure, small size, and rapid opening and closing. They are used to cut off or regulate the flow of media. Their basic working principle is to rotate the valve plate through a drive device, changing the angle between the valve plate and the fluid channel, thereby achieving fluid flow control.

[0003] The sealing performance is one of the key indicators of a traditional butterfly valve. In existing technology, to improve the sealing effect, elastic materials (such as rubber) are typically used to make the valve seat sealing ring or the sealing layer on the edge of the valve plate. When the valve is closed, the valve plate compresses the elastic sealing ring, relying on the deformation of the material to fill the gap and achieve a seal. However, the effectiveness of traditional elastic seals largely depends on the closing preload of the valve plate. Under low-pressure conditions, a large closing torque may be required to ensure sufficient sealing pressure; while under high-pressure conditions, the medium pressure may push the valve plate open, leading to seal failure and leakage. In other words, its sealing capacity is difficult to adapt to fluctuations in system pressure. Summary of the Invention

[0004] The purpose of this invention is to provide a butterfly valve with automatic sealing adjustment, which can adjust the seal between the valve plate and the valve seat by using the pressure of the liquid, so as to make the seal tighter.

[0005] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a valve seat; the valve seat has a hollow space, and the valve seat forms an inner wall and an outer wall through the hollow space; a valve plate is rotatably mounted in the hollow space of the valve seat, and a driving device for driving the valve plate to rotate is also provided on the valve seat. The valve plate forms a closed or open state of the hollow space through the driving device; the valve seat has a front and a back side, and an inlet groove extending along the contour direction of the valve seat and allowing liquid to enter is provided on the front side of the valve seat. The inlet groove extends from the front side of the valve seat to the back side of the valve seat; multiple connecting channels communicating with the inlet groove are also provided. Each connecting channel is evenly arranged along the contour direction of the inlet groove. One end of the connecting channel is connected to the inlet groove, and the other end of the connecting channel is connected to the hollow space; a sealing ring is fixedly mounted on the inner wall of the valve seat, and the outer wall of the sealing ring acts on the end of the connecting channel that communicates with the hollow space. The valve plate is driven by the driving device to form a fit or separation with the inner wall of the sealing ring.

[0006] Furthermore, the outer wall of the sealing ring is provided with multiple guide portions that allow liquid to enter and push the inner wall of the sealing ring towards the center of the hollow space. Each guide portion corresponds to a specific connecting channel. Each guide portion has a first guide groove and a second guide groove, one end of which is connected to the corresponding connecting channel. The first guide groove extends along the positive direction of the sealing ring's outline, and the second guide groove extends along the negative direction of the sealing ring's outline. The first guide groove and the second guide groove are connected. The first guide groove in one of the guide portions of two adjacent connecting channels is close to the second guide groove in the guide portion of the other connecting channel.

[0007] Furthermore, the inner walls of both the first guide groove and the second guide groove protrude towards the center, and the ends of both the first guide groove and the guide groove that are away from the connecting channel extend towards the inlet groove.

[0008] Furthermore, the valve plate is provided with a first rotating shaft and a second rotating shaft, which are fixedly mounted on the outer wall of the valve plate. The inner wall of the valve seat is provided with a rotating hole for the first rotating shaft to rotate within it, and a through hole for the second rotating shaft to pass through and rotate within it. The rotating hole and the through hole are symmetrically arranged about the axis of symmetry of the front of the valve seat. One end of the second rotating shaft is fixedly mounted on the valve plate, and the other end of the second rotating shaft extends out of the through hole and is fixedly connected to the driving end of the driving device. The valve plate is rotatably mounted in the hollow space by the driving of the driving device, the rotational engagement of the first rotating shaft and the rotating hole, and the rotational engagement of the second rotating shaft and the through hole.

[0009] Furthermore, the sealing ring is provided with two clearance grooves, which are provided to correspond to the rotating hole and the through hole. The clearance groove corresponding to the rotating hole allows the first rotating shaft to pass through, and the clearance groove corresponding to the through hole allows the second rotating shaft to pass through. The inner wall of the clearance groove corresponding to the rotating hole acts on the first rotating shaft, and the inner wall of the clearance groove corresponding to the through hole acts on the second rotating shaft.

[0010] Furthermore, rotating bearings are fixedly fitted on both the first and second rotating shafts. The rotating bearing on the first rotating shaft is fixedly installed in the rotating hole, and the rotating bearing on the second rotating shaft is fixedly installed in the through hole.

[0011] The present invention has the following positive effects: (1) The valve seat of the present invention has an inlet groove on the front side and multiple connecting channels. Each connecting channel is evenly arranged along the contour direction of the inlet groove. One end of the connecting channel is connected to the inlet groove, and the other end of the connecting channel is connected to the hollow space. A sealing ring is fixed on the inner wall of the valve seat and is coaxially arranged. The outer wall of the sealing ring acts on the end of the connecting channel connected to the hollow space. The liquid passes through the inlet groove and the connecting channel in sequence. After passing through the connecting channel, the liquid acts on the sealing ring. Under the action of hydraulic pressure, the sealing ring squeezes the valve plate toward the hollow space. The sealing is then adjusted by the liquid pressure, which can enhance the sealing effect and make the sealing tighter.

[0012] (2) The outer wall of the sealing ring of this utility model is provided with a plurality of guide portions that allow liquid to enter and push the inner wall of the sealing ring toward the center of the hollow space by the liquid. The guide portions have a first guide groove and a second guide groove. One end of the first guide groove and the second guide groove are connected to the corresponding connecting channel. The first guide groove extends along the positive direction of the contour of the sealing ring, and the second guide groove extends along the opposite direction of the contour of the sealing ring. The first guide groove and the second guide groove can increase the area of ​​liquid squeezing the sealing ring, and the contact between the sealing ring and the valve plate is tighter.

[0013] (3) The first guide groove and the second guide groove of this utility model are connected; the first guide groove in one of the corresponding guide parts of two adjacent connecting channels is close to the second guide groove in the corresponding guide part of the other connecting channel. By being close to each other, the area of ​​liquid squeezing the sealing ring can be further widened, thereby making the range of sealing conditions larger.

[0014] (4) Rotary bearings are fixedly sleeved on the first rotating shaft and the second rotating shaft of this utility model. The rotary bearing on the first rotating shaft is fixedly installed in the rotating hole, and the rotary bearing on the second rotating shaft is fixedly installed in the through hole. The installation of the rotary bearings makes the valve plate rotate more smoothly. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the valve seat of this utility model; Figure 3 This is a schematic diagram of the valve plate of this utility model; Figure 4 for Figure 2 A magnified view of part A in the middle.

[0016] In the figure, valve seat: 1, hollow space: 11, inlet groove: 12, rotating hole: 13, through hole: 14, valve plate: 2, first rotating shaft: 21, second rotating shaft: 22, drive device: 3, connecting channel: 4, sealing ring: 5, guide part: 6, first guide groove: 61, second guide groove: 62, clearance groove: 7, rotating bearing: 8. Detailed Implementation

[0017] As shown in the figure, this utility model has a valve seat 1; the valve seat 1 has a hollow space 11, through which the valve seat 1 forms an inner wall and an outer wall; a valve plate 2 is rotatably mounted in the hollow space 11 of the valve seat 1, and the valve seat 1 is also provided with a driving device 3 for driving the valve plate 2 to rotate, the valve plate 2 being driven by the driving device 3 to close or open the hollow space 11; the valve seat 1 has a front and a back, the front of the valve seat 1 is provided with an inlet groove 12 extending along the contour direction of the valve seat 1 and allowing liquid to enter, the inlet groove 12 from the valve seat 1 The valve plate 1 extends from the opposite side of the valve seat 1; it is also provided with multiple connecting channels 4 that communicate with the inlet groove 12. Each connecting channel 4 is evenly arranged along the contour direction of the inlet groove 12. One end of the connecting channel 4 communicates with the inlet groove 12, and the other end of the connecting channel 4 communicates with the hollow space 11. A sealing ring 5 is fixedly provided on the inner wall of the valve seat 1. The outer wall of the sealing ring 5 acts on the end of the connecting channel 4 that communicates with the hollow space 11. The valve plate 2 is driven by the driving device 3 to form a fit or separation with the inner wall of the sealing ring 5.

[0018] The outer wall of the sealing ring 5 is provided with multiple guide portions 6, which allow liquid to enter and push the inner wall of the sealing ring 5 toward the center of the hollow space 11. Each guide portion 6 is correspondingly arranged with each connecting channel 4. Each guide portion 6 has a first guide groove 61 and a second guide groove 62. One end of the first guide groove 61 and the second guide groove 62 are connected to the corresponding connecting channel 4. The first guide groove 61 extends along the positive direction of the contour of the sealing ring 5, and the second guide groove 62 extends along the opposite direction of the contour of the sealing ring 5. The first guide groove 61 and the second guide groove 62 are connected. The first guide groove 61 in one of the guide portions 6 of two adjacent connecting channels 4 is close to the second guide groove 62 in the guide portion 6 of the other connecting channel 4.

[0019] The inner walls of the first guide groove 61 and the second guide groove 62 are both protruding towards the center, and the ends of the first guide groove 61 and the second guide groove 62 away from the connecting channel 4 are both extended towards the inlet groove 12.

[0020] During each opening and closing process, the valve plate 2 will rub and squeeze against the sealing ring 5. Long-term use will lead to wear, fatigue or permanent deformation of the sealing material, and the sealing performance will decrease. This is especially true in media containing particulate matter, where the wear is more severe. When the valve plate 2 is open, the liquid passes through the hollow space 11, and the liquid in the first guide groove 61 and the second guide groove 62 is reduced, the hydraulic pressure is reduced, the friction between the sealing ring 5 and the valve plate 2 is reduced, and the service life is extended.

[0021] The valve plate 2 is provided with a first rotating shaft 21 and a second rotating shaft 22. The first rotating shaft 21 and the second rotating shaft 22 are fixedly installed on the outer wall of the valve plate 2. The inner wall of the valve seat 1 is provided with a rotating hole 13 for the first rotating shaft 21 to form a rotating fit. The inner wall of the valve seat 1 is also provided with a through hole 14 for the second rotating shaft 22 to pass through and form a rotating fit. The rotating hole 13 and the through hole 14 are symmetrically arranged with the axis of symmetry of the front of the valve seat 1 as the axis of symmetry. One end of the second rotating shaft 22 is fixedly installed on the valve plate 2, and the other end of the second rotating shaft 22 extends out of the through hole 14 and is fixedly connected to the driving end of the driving device 3. The valve plate 2 is rotatably installed in the hollow space 11 by the driving of the driving device 3, the rotating fit between the first rotating shaft 21 and the rotating hole 13, and the rotating fit between the second rotating shaft 22 and the through hole 14.

[0022] The sealing ring 5 is provided with a through groove 7. There are two through grooves 7, which are provided corresponding to the rotating hole 13 and the through hole 14. The through groove 7 corresponding to the rotating hole 13 allows the first rotating shaft 21 to pass through, and the through groove 7 corresponding to the through hole 14 allows the second rotating shaft 22 to pass through. The inner wall of the through groove 7 corresponding to the rotating hole 13 acts on the first rotating shaft 21, and the inner wall of the through groove 7 corresponding to the through hole 14 acts on the second rotating shaft 22.

[0023] Rotary bearings 8 are fixedly sleeved on both the first rotating shaft 21 and the second rotating shaft 22. The rotary bearing 8 on the first rotating shaft 21 is fixedly installed in the rotating hole 13, and the rotary bearing 8 on the second rotating shaft 22 is fixedly installed in the through hole 14.

[0024] The working principle of this utility model is as follows: the valve plate 2 is rotatably set in the hollow space 11 through the rotational cooperation of the first rotating shaft 21 and the rotating hole 13 and the rotational cooperation of the second rotating shaft 22 and the through hole 14. The second rotating shaft 22 is fixedly connected to the driving end of the driving device 3 after passing through the through hole 14, and the sealing ring 5 is fixedly set in the hollow space 11. When the valve plate 2 is closed in the hollow space 11 by the drive of the drive device 3, the outer wall of the sealing ring 5 is fixed on the inner wall of the valve seat 1. The inner wall of the sealing ring 5 acts on the outer wall of the valve plate 2. The liquid flows into the connecting channel 4 through the inlet groove 12. The liquid flows into the first guide groove 61 and the second guide groove 62 in the connecting channel 4. Since the sealing ring 5 itself is elastic, the liquid in the first guide groove 61 and the second guide groove 62 squeezes the sealing ring 5 towards the valve plate 2 under the action of liquid pressure. The greater the liquid pressure, the tighter the sealing ring 5 adheres to the valve plate 2.

[0025] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A butterfly valve with automatic sealing adjustment, having a valve seat (1); characterized in that: The valve seat (1) has a hollow space (11) with a hollow structure. The valve seat (1) forms an inner wall and an outer wall through the hollow space (11). A valve plate (2) is rotatably mounted in the hollow space (11) of the valve seat (1). The valve seat (1) is also provided with a driving device (3) for driving the valve plate (2) to rotate. The valve plate (2) is closed or opened by the driving device (3). The valve seat (1) has a front and a back. The front of the valve seat (1) is provided with an inlet groove (12) that extends along the outline of the valve seat (1) and allows liquid to enter. The inlet groove (12) extends from the front of the valve seat (1) towards the valve. The valve seat (1) extends to the opposite side; it is also provided with multiple connecting channels (4) that communicate with the inlet groove (12). Each connecting channel (4) is evenly arranged along the contour direction of the inlet groove (12). One end of the connecting channel (4) is connected to the inlet groove (12), and the other end of the connecting channel (4) is connected to the hollow space (11). A sealing ring (5) is fixedly provided on the inner wall of the valve seat (1). The outer wall of the sealing ring (5) acts on the end of the connecting channel (4) that is connected to the hollow space (11). The valve plate (2) is driven by the driving device (3) to form a fit or separation with the inner wall of the sealing ring (5).

2. The butterfly valve with automatic sealing adjustment according to claim 1, characterized in that: The outer wall of the sealing ring (5) is provided with a plurality of guide portions (6) that allow liquid to enter and push the inner wall of the sealing ring (5) toward the center of the hollow space (11) by the liquid. Each guide portion (6) is correspondingly set with each connecting channel (4). Each guide portion (6) has a first guide groove (61) and a second guide groove (62). One end of the first guide groove (61) and the second guide groove (62) are connected to the corresponding connecting channel (4). The first guide groove (61) extends along the positive direction of the contour of the sealing ring (5), and the second guide groove (62) extends along the opposite direction of the contour of the sealing ring (5). The first guide groove (61) and the second guide groove (62) are connected. The first guide groove (61) in one of the guide portions (6) of two adjacent connecting channels (4) is close to the second guide groove (62) in the guide portion (6) of the other connecting channel (4).

3. A butterfly valve with automatic sealing adjustment according to claim 2, characterized in that: The inner walls of the first guide groove (61) and the second guide groove (62) are both protruding towards the center, and the ends of the first guide groove (61) and the second guide groove (62) away from the connecting channel (4) are both extended towards the inlet groove (12).

4. A butterfly valve with automatic sealing adjustment according to claim 1, characterized in that: The valve plate (2) is provided with a first rotating shaft (21) and a second rotating shaft (22). The first rotating shaft (21) and the second rotating shaft (22) are fixedly installed on the outer wall of the valve plate (2). The inner wall of the valve seat (1) is provided with a rotating hole (13) in which the first rotating shaft (21) can form a rotating fit. The inner wall of the valve seat (1) is also provided with a through hole (14) in which the second rotating shaft (22) can pass and form a rotating fit. The rotating hole (13) and the through hole (14) are connected to the valve seat. (1) The front side is symmetrically arranged along the axis of symmetry; one end of the second rotating shaft (22) is fixedly arranged on the valve plate (2), and the other end of the second rotating shaft (22) extends out through the through hole (14) and is fixedly connected to the driving end of the driving device (3). The valve plate (2) is rotatably arranged in the hollow space (11) by the driving of the driving device (3), the rotational cooperation between the first rotating shaft (21) and the rotating hole (13), and the rotational cooperation between the second rotating shaft (22) and the through hole (14).

5. A butterfly valve with automatic sealing adjustment according to claim 4, characterized in that: The sealing ring (5) is provided with a through groove (7). There are two through grooves (7). The two through grooves (7) are provided corresponding to the rotating hole (13) and the through hole (14). The through groove (7) corresponding to the rotating hole (13) allows the first rotating shaft (21) to pass through, and the through groove (7) corresponding to the through hole (14) allows the second rotating shaft (22) to pass through. The inner wall of the through groove (7) corresponding to the rotating hole (13) acts on the first rotating shaft (21), and the inner wall of the through groove (7) corresponding to the through hole (14) acts on the second rotating shaft (22).

6. A butterfly valve with automatic sealing adjustment according to claim 4, characterized in that: Rotary bearings (8) are fixedly sleeved on both the first rotating shaft (21) and the second rotating shaft (22). The rotary bearing (8) on the first rotating shaft (21) is fixedly installed in the rotating hole (13), and the rotary bearing (8) on the second rotating shaft (22) is fixedly installed in the through hole (14).

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