CN117450268A

CN117450268A - Butterfly valve clamping ring

Info

Publication number: CN117450268A
Application number: CN202311641172.2A
Authority: CN
Inventors: 刘雯; 许婧; 俞红江
Original assignee: Chengdu Zhonglan Valve Co ltd
Current assignee: Chengdu Zhonglan Valve Co ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-01-26

Abstract

The invention belongs to the technical field of butterfly valves, in particular to a butterfly valve compression ring, wherein the compression ring is detachably arranged in a valve body, an upper shaft tube and a lower shaft tube which are coaxially distributed are arranged on the outer wall of the circumference of the valve body, a valve shaft is inserted in the upper shaft tube and the lower shaft tube together, a ferrule is rotationally connected onto the valve shaft and fixedly connected with the upper shaft tube through a plurality of first bolt assemblies, an end cover attached to the bottom end of the valve shaft is fixed at the bottom end of the lower shaft tube through a plurality of second bolt assemblies, a disc plate positioned in the valve body is fixedly sleeved on the valve shaft, and a sealing assembly is arranged between the compression ring and the disc plate. According to the invention, by arranging the two sealing components, the abrasion of the sealing element can be effectively reduced in the rotating process of the disc plate, and the service life of the sealing element is prolonged.

Description

Butterfly valve clamping ring

Technical Field

The invention relates to the technical field of butterfly valves, in particular to a butterfly valve compression ring.

Background

The butterfly valve is also called as a flap valve, and is a valve which has a simple structure and can be used for opening and closing low-pressure pipeline media. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe is mainly used for cutting and throttling.

The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly valve opening and closing piece in the valve body, so that the purpose of opening and closing or adjusting is achieved. The sealing element is generally installed on the disc plate, when the disc plate rotates to the position of the closing state, the sealing element is extruded with the pressing ring to realize sealing, but the sealing element is in the rotating state in the process of being extruded by the sealing element, and the pressing ring can form larger abrasion on the sealing element, so that the service life of the sealing element is influenced, and therefore, the butterfly valve pressing ring is provided, and abrasion on the sealing element can be reduced in use.

Disclosure of Invention

Based on the technical problems in the prior art, the invention provides a butterfly valve compression ring.

The butterfly valve pressing ring is detachably arranged in a valve body, an upper shaft tube and a lower shaft tube which are coaxially distributed are arranged on the outer wall of the circumference of the valve body, a valve shaft is inserted in the upper shaft tube and the lower shaft tube together, a ferrule is rotationally connected to the valve shaft and fixedly connected with the upper shaft tube through a plurality of first bolt assemblies, an end cover attached to the bottom end of the valve shaft is fixed at the bottom end of the lower shaft tube through a plurality of second bolt assemblies, a disc plate positioned in the valve body is fixedly sleeved on the valve shaft, and a sealing assembly is arranged between the pressing ring and the disc plate.

Preferably, the sealing component comprises a sealing piece arranged on the disc plate, the sealing piece comprises a sealing air bag and a middle air bag positioned at the center of the sealing air bag, the middle air bag is connected with the sealing air bag through a plurality of branch air bags distributed radially, the sealing air bag is positioned on the circumferential outer wall of the disc plate, a stress disc capable of transversely moving is axially arranged on the disc plate, the inner end of the stress disc is detachably fixed with a pressing plate used for pressing the middle air bag, when the disc plate is in a closed state, the stress disc drives the pressing plate to press the middle air bag under the action of fluid, gas in the middle air bag enters the sealing air bag through the branch air bags, and the sealing air bag gradually expands and abuts against the pressing ring.

Preferably, the force-bearing plate is of bowl-shaped structure.

Preferably, the dish board includes first dish board and second dish board, and first recess, second recess and the third recess that are used for wrapping middle gasbag, branch gasbag and sealed gasbag respectively are all offered to the relative one side of first dish board and second dish board, and the clamp plate is located the circular slot on the second dish board, has offered the first screw thread groove that a plurality of annular arrays distribute on the first dish board, all inserts in a plurality of round holes on the second dish board and is equipped with the first bolt with first screw thread groove threaded connection.

Preferably, the pressing plate is provided with a stud, and the stress disc is provided with an internal thread in threaded connection with the stud.

Preferably, the sealing assembly comprises a mounting ring which is elastically connected with the compression ring, a ring groove is formed in the mounting ring, and a sealing ring is inserted in the ring groove.

Preferably, a plurality of positioning blocks distributed in an annular array are fixed on the circumferential inner wall of the pressure ring, a spring is fixed on each positioning block, and the other end of each spring is fixed on the mounting ring.

Preferably, the positioning block is provided with a guide hole, a guide post with the end part fixed on the mounting ring is inserted in the guide hole, and the guide post penetrates through the spring.

Preferably, a plurality of positioning grooves distributed in an annular array are formed in the sealing ring, and a plurality of positioning columns which are distributed in an annular array and are inserted into the positioning grooves are fixed on the inner wall of the annular groove.

Preferably, the pressure ring is located on the step part in the valve body, a plurality of positioning cylinders distributed in annular arrays are arranged on the pressure ring, a plurality of lugs distributed in annular arrays are arranged on the circumferential inner wall of the valve body, and second bolts capable of being inserted into the positioning cylinders are connected to the lugs in a threaded mode.

Compared with the prior art, the invention provides the butterfly valve compression ring, which has the following beneficial effects:

1. the butterfly valve compression ring is provided with two sealing assemblies, so that abrasion to a sealing element can be effectively reduced in the rotating process of a disc plate, and the service life of the sealing element is prolonged.

2. Through setting up first kind seal assembly, when the dish board is in the position of closed state, the dish board is exactly perpendicular with fluidic flow direction, the atress dish drives the clamp plate under the fluidic action and extrudes middle gasbag, the gas in the middle gasbag gets into sealed gasbag through the branch gasbag, sealed gasbag expands gradually and supports tight clamping ring, thereby seal the gap between dish board and the clamping ring, and the dish board rotates when opening the state, the dish board can incline gradually, the fluidic effort that the atress dish received reduces gradually, the clamp plate also can reduce to the pressure of middle gasbag thereupon, just so make sealed gasbag shrink gradually, thereby effectively reduce the frictional force between sealed gasbag and the clamping ring, reduce the wearing and tearing that sealed gasbag received, the life of extension sealing member.

3. The butterfly valve compression ring is provided with the stress disc in a bowl-shaped structure, so that the fluid acting force born by the stress disc is larger when the disc plate is in the closed state, and the sealing air bag and the compression ring are attached tightly, so that the sealing effect is improved.

4. A butterfly valve compression ring is formed by arranging a disc plate formed by a first disc plate and a second disc plate, when a sealing piece is installed, the sealing piece is only required to be placed in a corresponding first groove, a second groove and a third groove, then a stud on a pressing plate penetrates through the second disc plate, the first disc plate and the second disc plate are pressed together, then internal threads on a stress disc and the stud are screwed, and finally a first bolt is inserted into a round hole and screwed into a first thread groove, so that the sealing piece and the pressing plate are installed.

5. Through setting up second kind seal assembly, when the dish board is in the position of closed state, fluid promotes the collar and is close to the dish board, until the sealing washer hugs closely the dish board to seal the gap between dish board and the valve body, and when the dish board rotates and opens, the dish board will push away sealing washer and collar together gradually, thereby effectively reduce the frictional force between sealing washer and the dish board, reduce the wearing and tearing that the sealing washer received, the life of extension sealing washer.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a butterfly valve press ring according to the present invention;

FIG. 2 is a schematic view of a first angle structure of the inner part of a butterfly valve pressing ring according to the present invention;

FIG. 3 is a schematic view of a second angle structure of the inner part of the butterfly valve pressing ring according to the present invention;

FIG. 4 is an enlarged schematic view of the structure of the butterfly valve pressing ring A in FIG. 2;

FIG. 5 is a schematic cross-sectional view of a butterfly valve pressure ring according to the present invention;

FIG. 6 is a schematic diagram of a cross-sectional structure of a butterfly plate of a butterfly valve press ring according to the present invention;

FIG. 7 is a schematic view of a disc plate detaching structure of a butterfly valve pressing ring according to the present invention;

FIG. 8 is an enlarged view of the structure of the butterfly valve press ring at B according to the present invention as shown in FIG. 5;

FIG. 9 is a schematic diagram of a seal assembly mounting structure for a butterfly valve compression ring according to the present invention;

fig. 10 is an enlarged schematic view of a structure of a butterfly valve pressing ring at C according to the present invention as shown in fig. 9. In the figure: 1. a valve body; 2. an upper shaft tube; 3. a valve shaft; 4. a dish plate; 401. a first plate; 402. a second plate; 5. a compression ring; 6. a ferrule; 7. a first bolt assembly; 8. a lower shaft tube; 9. an end cap; 10. a second bolt assembly; 11. a first groove; 12. a second groove; 13. a third groove; 14. an intermediate air bag; 15. a branched airbag; 16. sealing the air bag; 17. a circular groove; 18. a pressing plate; 19. a force-bearing plate; 20. a round hole; 21. a first thread groove; 22. a first bolt; 23. ear pieces; 24. a second bolt; 25. a positioning cylinder; 26. a step portion; 27. a mounting ring; 28. a seal ring; 29. a ring groove; 30. a positioning block; 31. a spring; 32. a guide post; 33. a guide hole; 34. a positioning groove; 35. positioning columns; 36. an internal thread; 37. a stud.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Referring to fig. 1-10, a butterfly valve clamping ring, clamping ring 5 demountable installation is in valve body 1, be equipped with coaxial distribution's last central siphon 2 and lower central siphon 8 on the circumference outer wall of valve body 1, go up central siphon 2 and insert jointly in lower central siphon 8 and be equipped with valve shaft 3, it is connected with lasso 6 to rotate on the valve shaft 3, lasso 6 is fixed with the end cover 9 that pastes with valve shaft 3 bottom through a plurality of first bolt assemblies 7 and last central siphon 2 fixed connection, lower central siphon 8 bottom through a plurality of second bolt assemblies 10, fixed cover is equipped with the dish board 4 that is located valve body 1 on the valve shaft 3, be provided with seal assembly between clamping ring 5 and the dish board 4.

Further, the sealing assembly comprises a sealing element arranged on the disc plate 4, the sealing element comprises a sealing air bag 16 and an intermediate air bag 14 positioned in the center of the sealing air bag 16, the intermediate air bag 14 and the sealing air bag 16 are connected through a plurality of branched air bags 15 distributed radially, the sealing air bag 16 is positioned on the circumferential outer wall of the disc plate 4, a stress disc 19 capable of transversely moving is arranged on the axial direction of the disc plate 4, a pressing plate 18 used for pressing the intermediate air bag 14 is detachably fixed at the inner end of the stress disc 19, when the disc plate 4 is in a closed state, the disc plate 4 is exactly perpendicular to the flowing direction of fluid, the pressing plate 18 is driven by the stress disc 19 to press the intermediate air bag 14 under the action of the fluid, the air in the intermediate air bag 14 enters the sealing air bag 16 through the branched air bag 15, the sealing air bag 16 gradually expands and abuts against the pressing ring 5, so that gaps between the disc plate 4 and the pressing ring 5 are sealed, when the disc plate 4 rotates to an open state, the fluid acting force applied by the stress disc 19 gradually decreases, and the pressure of the pressing plate 18 on the intermediate air bag 14 is also reduced, so that the sealing air bag 16 gradually contracts, the sealing air bag 16 is effectively reduced, the service life of the sealing air bag is prolonged, and the friction life of the sealing air bag is prolonged.

Further, the stress disc 19 is of a bowl-shaped structure, so that the fluid acting force born by the stress disc 19 is larger when the disc plate 4 is in the closed state, and the sealing air bag 16 and the compression ring 5 are tightly attached, and the sealing effect is improved.

Further, the disc plate 4 includes a first disc plate 401 and a second disc plate 402, the opposite sides of the first disc plate 401 and the second disc plate 402 are respectively provided with a first groove 11, a second groove 12 and a third groove 13 for wrapping the middle air bag 14, the branch air bag 15 and the sealing air bag 16, the pressing plate 18 is located in the circular groove 17 on the second disc plate 402, the first disc plate 401 is provided with a plurality of first thread grooves 21 distributed in a ring array, the second disc plate 402 is provided with a plurality of round holes 20 which are inserted with first bolts 22 in threaded connection with the first thread grooves 21, when the sealing element is installed, only the sealing element is required to be placed in the corresponding first groove 11, second groove 12 and third groove 13, then the first disc plate 401 and the second disc plate 402 are pressed together, and finally the first bolts 22 are inserted into the round holes 20 and screwed into the first thread grooves 21, so that the sealing element is installed.

Further, the pressing plate 18 is provided with a stud 37, the force-receiving plate 19 is provided with an internal thread 36 in threaded connection with the stud 37, when the pressing plate 18 is installed, after the sealing element is placed in, the stud 37 on the pressing plate 18 passes through the second plate 402, the first plate 401 and the second plate 402 are pressed together, and then the internal thread 36 and the stud 37 on the force-receiving plate 19 are screwed.

Further, the seal assembly comprises a mounting ring 27 which is elastically connected with the compression ring 5, a ring groove 29 is formed in the mounting ring 27, a seal ring 28 is inserted in the ring groove 29, when the disc plate 4 is in a closed state, fluid pushes the mounting ring 27 to be close to the disc plate 4 until the seal ring 28 is tightly attached to the disc plate 4, so that a gap between the disc plate 4 and the valve body 1 is sealed, when the disc plate 4 rotates to be opened, the disc plate 4 gradually pushes the seal ring 28 and the mounting ring 27 away together, thereby effectively reducing friction force between the seal ring 28 and the disc plate 4, reducing abrasion of the seal ring 28 and prolonging the service life of the seal ring 28.

Further, a plurality of positioning blocks 30 distributed in a ring-shaped array are fixed on the circumferential inner wall of the compression ring 5, springs 31 are fixed on the positioning blocks 30, and the other ends of the springs 31 are fixed on the mounting ring 27, so that elastic connection can be formed between the mounting ring 27 and the compression ring 5 through the springs 31.

Further, the positioning block 30 is provided with a guide hole 33, the guide hole 33 is internally provided with a guide post 32, the end part of the guide post 32 is fixed on the mounting ring 27, the guide post 32 penetrates through the spring 31, the mounting ring 27 can be stably limited and moved through the cooperation between the guide post 32 and the guide hole 33, and the guide post 32 can effectively prevent the spring 31 from being distorted and deformed.

Further, a plurality of positioning grooves 34 distributed in an annular array are formed in the sealing ring 28, a plurality of positioning columns 35 which are distributed in an annular array and are inserted into the positioning grooves 34 are fixed on the inner wall of the annular groove 29, and the sealing ring 28 can be stabilized through the cooperation of the positioning columns 35 and the positioning grooves 34, so that the sealing ring 28 is prevented from shifting on the mounting ring 27 after being stressed.

Further, the compression ring 5 is located on the step portion 26 in the valve body 1, a plurality of positioning cylinders 25 distributed in an annular array are arranged on the compression ring 5, a plurality of annular array distributed lugs 23 are arranged on the circumferential inner wall of the valve body 1, second bolts 24 capable of being inserted into the positioning cylinders 25 are connected to the lugs 23 in a threaded mode, the compression ring 5 is placed in the step portion 26 in the valve body 1, then the second bolts 24 are inserted into the lugs 23, the second bolts 24 are screwed down, the second bolts 24 are inserted into the positioning cylinders 25, and therefore the compression ring 5 can be pressed and fixed to the step portion 26, and the assembly and the disassembly are convenient.

Working principle: when the disc plate 4 is in a closed state, the disc plate 4 is exactly vertical to the flow direction of fluid, the pressure plate 18 is driven by the force-bearing plate 19 to squeeze the middle air bag 14 under the action of the fluid, the gas in the middle air bag 14 enters the sealing air bag 16 through the branch air bag 15, the sealing air bag 16 is gradually expanded and abuts against the compression ring 5, so that a gap between the disc plate 4 and the compression ring 5 is sealed, when the disc plate 4 rotates to an open state, the disc plate 4 is gradually inclined, the fluid acting force borne by the force-bearing plate 19 is gradually reduced, the pressure of the pressure plate 18 on the middle air bag 14 is also reduced, so that the sealing air bag 16 is gradually contracted, the friction force between the sealing air bag 16 and the compression ring 5 is effectively reduced, and the abrasion borne by the sealing air bag 16 is reduced;

when the sealing element is installed, the sealing element is only required to be placed into the corresponding first groove 11, the second groove 12 and the third groove 13, then the stud 37 on the pressing plate 18 passes through the second plate 402, then the first plate 401 and the second plate 402 are pressed together, then the internal threads 36 and the stud 37 on the stress disc 19 are screwed, and finally the first bolt 22 is inserted into the round hole 20 and screwed into the first thread groove 21, so that the installation of the sealing element and the pressing plate is completed;

or when the dish board 4 is in the closed state, the fluid pushes the mounting ring 27 to be close to the dish board 4 until the sealing ring 28 is tightly attached to the dish board 4, so that a gap between the dish board 4 and the valve body 1 is sealed, and when the dish board 4 rotates to be opened, the dish board 4 gradually pushes away the sealing ring 28 and the mounting ring 27 together, so that the friction force between the sealing ring 28 and the dish board 4 is effectively reduced, the abrasion to the sealing ring 28 is reduced, and the service life of the sealing ring 28 is prolonged.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. The utility model provides a butterfly valve clamping ring, its characterized in that, clamping ring (5) demountable installation is in valve body (1), be equipped with coaxial distribution's last central siphon (2) and lower central siphon (8) on valve body (1) circumference outer wall, go up central siphon (2) and insert jointly in lower central siphon (8) and be equipped with valve shaft (3), it is connected with lasso (6) to rotate on valve shaft (3), lasso (6) are through a plurality of first bolt assembly (7) and last central siphon (2) fixed connection, lower central siphon (8) bottom is fixed with end cover (9) that pastes with valve shaft (3) bottom through a plurality of second bolt assembly (10), fixed cover is equipped with on valve shaft (3) and is located inside dish board (4) of valve body (1), be provided with seal assembly between clamping ring (5) and dish board (4).

2. A butterfly valve press ring according to claim 1, characterized in that the sealing assembly comprises a sealing element arranged on the disc plate (4), the sealing element comprises a sealing air bag (16) and an intermediate air bag (14) arranged at the center of the sealing air bag (16), the intermediate air bag (14) and the sealing air bag (16) are connected through a plurality of branched air bags (15) distributed radially, the sealing air bag (16) is arranged on the circumferential outer wall of the disc plate (4), a stress disc (19) capable of transversely moving is arranged on the disc plate (4) in the axial direction, a pressing plate (18) used for pressing the intermediate air bag (14) is detachably fixed at the inner end of the stress disc (19), when the disc plate (4) is in a closed state, the stress disc (19) drives the pressing plate (18) to press the intermediate air bag (14) under the action of fluid, gas in the intermediate air bag (14) enters the sealing air bag (16) through the branched air bags (15), and the sealing air bag (16) gradually expands and presses against the ring (5).

3. A butterfly valve press ring according to claim 2, characterized in that the force disc (19) is of bowl-like construction.

4. The butterfly valve pressing ring according to claim 2, wherein the disc plate (4) comprises a first disc plate (401) and a second disc plate (402), the opposite surfaces of the first disc plate (401) and the second disc plate (402) are respectively provided with a first groove (11), a second groove (12) and a third groove (13) for wrapping the middle air bag (14), the branch air bag (15) and the sealing air bag (16), the pressing plate (18) is located in a circular groove (17) on the second disc plate (402), the first disc plate (401) is provided with a plurality of first thread grooves (21) distributed in a ring array, and a plurality of circular holes (20) on the second disc plate (402) are respectively internally provided with first bolts (22) in threaded connection with the first thread grooves (21).

5. A butterfly valve press ring according to claim 2, characterized in that the press plate (18) is provided with a stud (37), and the force-receiving plate (19) is provided with an internal thread (36) in threaded connection with the stud (37).

6. A butterfly valve press ring according to claim 1, characterized in that the sealing assembly comprises a mounting ring (27) which is elastically connected with the press ring (5), the mounting ring (27) is provided with a ring groove (29), and a sealing ring (28) is inserted in the ring groove (29).

7. The butterfly valve pressing ring according to claim 6, wherein a plurality of positioning blocks (30) distributed in a ring-shaped array are fixed on the circumferential inner wall of the pressing ring (5), a spring (31) is fixed on the positioning blocks (30), and the other end of the spring (31) is fixed on the mounting ring (27).

8. The butterfly valve pressing ring according to claim 7, wherein the positioning block (30) is provided with a guide hole (33), a guide post (32) with an end fixed on the mounting ring (27) is inserted into the guide hole (33), and the guide post (32) penetrates through the spring (31).

9. The butterfly valve compression ring according to claim 6, wherein the sealing ring (28) is provided with a plurality of positioning grooves (34) distributed in an annular array, and a plurality of positioning columns (35) inserted in the positioning grooves (34) distributed in an annular array are fixed on the inner wall of the annular groove (29).

10. The butterfly valve pressing ring according to claim 1, wherein the pressing ring (5) is located on a step portion (26) in the valve body (1), a plurality of positioning cylinders (25) distributed in an annular array are arranged on the pressing ring (5), a plurality of lugs (23) distributed in an annular array are arranged on the inner wall of the circumference of the valve body (1), and second bolts (24) capable of being inserted into the positioning cylinders (25) are connected to the lugs (23) in a threaded mode.