CN115978208A

CN115978208A - Butterfly valve with good sealing performance

Info

Publication number: CN115978208A
Application number: CN202211630184.0A
Authority: CN
Inventors: 王福利; 杨志中; 仇旭东; 甘志华
Original assignee: Guangdong Fusite Fuild Technology Co ltd
Current assignee: Guangdong Fusite Fuild Technology Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-04-18

Abstract

The application discloses butterfly valve that leakproofness is good belongs to the field of valve. The utility model provides a butterfly valve that leakproofness is good, includes the valve body, the valve rod is installed to the rotatable formula of valve body, the valve rod is connected with the butterfly plate, the butterfly plate include the butterfly frame, connect in curb plate, the sliding connection of butterfly frame in the cut-off board of butterfly frame with connect in the butterfly frame with cut-off flexible connector between the board, butterfly frame fixed connection in the valve rod, the valve body inner wall be provided with be used for with the sealing washer that ends the board butt is close to certainly one side of butterfly plate is to keeping away from one side of butterfly plate the internal diameter of sealing washer reduces gradually, the butterfly frame is inside to be provided with and to be used for driving the cut-off board is followed valve body axial displacement's moving mechanism, the valve rod is provided with the guiding mechanism who is used for controlling the moving mechanism function. This application has the durability that improves the butterfly valve to improve the effect of the leakproofness of butterfly valve.

Description

Butterfly valve with good sealing performance

Technical Field

The application relates to the field of valves, in particular to a butterfly valve with good sealing performance.

Background

Valves are common components in fluid technology, and can control the flow and stop of various media in a fluid pipeline, and are indispensable components in a pipeline system. There are a variety of valves, with butterfly valves being one of the many types of valves.

The butterfly valve is also called a flap valve, has wide application range, and can control gas, water, corrosive media and liquid metal. The butterfly valve consists of a valve body, a valve rod, a butterfly plate and a sealing ring, the butterfly plate is driven to rotate by controlling the rotation of the valve rod, and the butterfly plate can cover the inner section of the valve body so as to play a role in stopping a pipeline medium; in a similar way, the butterfly plate is rotated, and the butterfly plate does not cover the inner section of the valve body any more, so that the circulation of the pipeline medium can be realized.

The butterfly valve can keep a cut-off state only by abutting the butterfly plate against the inner wall of the valve body, so that the edge of the butterfly plate is abraded with the inner wall of the valve body when the butterfly plate is rotated, and after the butterfly valve is used for a long time, the butterfly plate is seriously abraded, so that the sealing property of the butterfly valve is influenced, and the butterfly valve is not high in durability.

Disclosure of Invention

The application provides a butterfly valve with good sealing performance in order to improve the durability of the butterfly valve and improve the sealing performance of the butterfly valve.

The application provides a good butterfly valve of leakproofness adopts following technical scheme:

the utility model provides a butterfly valve that leakproofness is good, includes the valve body, the valve rod is installed to the rotatable formula of valve body, the valve rod is connected with the butterfly plate, the butterfly plate include the butterfly frame, connect in curb plate, the sliding connection of butterfly frame in the cut-off board of butterfly frame with connect in the butterfly frame with cut-off flexible connector between the board, butterfly frame fixed connection in the valve rod, the valve body inner wall be provided with be used for with the sealing washer that ends the board butt is close to certainly one side of butterfly plate is to keeping away from one side of butterfly plate the internal diameter of sealing washer reduces gradually, the butterfly frame is inside to be provided with and to be used for driving the cut-off board is followed valve body axial displacement's moving mechanism, the valve rod is provided with the guiding mechanism who is used for controlling the moving mechanism function.

By adopting the technical scheme, the stop plate can move relative to the butterfly frame under the action of the moving mechanism, so that after the butterfly plate is in a state of covering the inner section of the valve body, the stop plate can further move to be abutted against the sealing ring, the change of the inner diameter of the sealing ring can adapt to the movement of the stop plate so as to realize the tight connection of the sealing ring and the stop plate and realize the sealing of the butterfly valve, and the flexible connecting piece can play a role in ensuring the integral sealing of the butterfly valve; because the mode of rotating firstly and then sealing completely is adopted, a gap can be left between the stop plate and the inner wall of the valve body, and the abrasion caused by the rotation of the stop plate is reduced, so that the durability of the butterfly valve is improved, and the sealing performance of the butterfly valve is improved.

Optionally, the moving mechanism includes a rotating seat and an eccentric cam which are rotatably installed on the butterfly frame, the edges of the rotating seat and the eccentric cam are provided with meshing teeth which are meshed with each other, and the eccentric cam is connected to the stopping plate.

Through adopting above-mentioned technical scheme, the control rotates the seat and rotates, and accessible interlock tooth drives eccentric cam and rotates, because the eccentric settings of the axis of rotation of eccentric cam, consequently can drive the shut-off plate removal of being connected with eccentric cam, and then make the shut-off plate be close to the sealing washer, realize sealedly.

Optionally, the adjusting mechanism includes a control rod penetrating through the valve rod, a fixing block connected to a side wall of the control rod, and a transfer block connected to the control rod, the fixing block and the transfer block are polygonal blocks, the valve rod is provided with a circular groove and a control groove matched with the fixing block, and the rotating seat is provided with a transfer groove matched with the transfer block.

By adopting the technical scheme, the position of the control rod is adjusted, so that the fixed block is matched with the control groove or the transfer block is matched with the transfer groove, and the control valve rod can be selected to rotate or the rotating seat can be selected to rotate.

Optionally, the fixed block is clamped with the control slot, and the transfer block is clamped with the transfer slot.

Through adopting above-mentioned technical scheme, the mode of joint can improve the stability when fixed block and control slot cooperate to the frictional force that the joint produced can keep the position of control lever, effectively avoids the control lever to receive the gravity influence and the condition that removes.

Optionally, the cross-sectional area of the circular groove is larger than that of the fixing block.

By adopting the technical scheme, the fixing block can conveniently enter the circular groove, and the fixing block is not contacted with the valve rod in the circular groove, so that the valve rod is not driven to move when the rotating seat is controlled to rotate.

Optionally, the flexible connecting piece is an annular sealing strip extending in a wave shape, and two sides of the sealing strip are respectively connected with the cut-off plate and the butterfly frame.

By adopting the technical scheme, the sealing strip can prevent the medium from entering the interior of the butterfly plate, so that the integrity of the butterfly plate is ensured.

Optionally, the closing plate including connect in flexible connectors's fixed frame and rotatable formula connect in the commentaries on classics baffle of fixed frame, fixed frame sliding connection has the slider, the slider with eccentric cam rotates to be connected, the slider with it all is provided with intermeshing's rodent to change the baffle, fixed frame with change the equal butt of baffle in the sealing washer, change the baffle and deviate from a side of valve rod is equipped with a plurality of gomphosis pieces, the sealing washer seted up a plurality of with the gomphosis groove of gomphosis piece joint.

Through adopting above-mentioned technical scheme, when eccentric cam promoted to cut off the board and be close to the sealing washer, the rotation of eccentric cam drove the slider and slides, drove the baffle rotation of changeing under the effect of rodent again to drive the gomphosis piece joint in the gomphosis groove, increase cuts off the area of being connected of board and sealing washer, also promotes to cut off the board and further supports tight sealing washer, improves the sealed degree of butterfly valve.

Optionally, the fixed frame is provided with a straight groove, and the sliding block is slidably connected with the straight groove.

By adopting the technical scheme, the straight groove enables the sliding block to slide, and the sliding path of the sliding block can be controlled through the straight groove, so that the rotating range of the eccentric cam is controlled.

Optionally, the valve rod is provided with a limiting rod, and the stop plate is provided with a limiting cylinder sleeved on the limiting rod.

Through adopting above-mentioned technical scheme, the cooperation of gag lever post and spacing section of thick bamboo can be for changeing the removal and the rotation of baffle and play the guide effect, improve the stability of changeing the baffle.

Optionally, one end of the control rod penetrates out of the valve rod and is fixedly connected with a hand wheel.

Through adopting above-mentioned technical scheme, be convenient for to the control lever application of force to better control valve rod rotates or control moving mechanism and operates.

In summary, the present application has the following beneficial effects:

1. according to the butterfly valve, under the action of the moving mechanism, the stop plate can move relative to the butterfly frame, so that after the butterfly plate is in a state of covering the inner section of the valve body, the stop plate can further move to be abutted against the sealing ring, the change of the inner diameter of the sealing ring can adapt to the movement of the stop plate to realize the tight connection of the sealing ring and the stop plate, the sealing of the butterfly valve is realized, and the flexible connecting piece can play a role in ensuring the whole sealing of the butterfly valve; because the mode of rotating firstly and then sealing completely is adopted, a gap can be left between the stop plate and the inner wall of the valve body, and the abrasion caused by the rotation of the stop plate is reduced, so that the durability of the butterfly valve is improved, and the sealing performance of the butterfly valve is improved.

2. The action switching of the stop plate abutting against the sealing ring and the butterfly plate rotation can be controlled through the control rod, and the operation is convenient and fast; the stop plate comprises a fixed frame and a rotary baffle plate which is rotatably connected to the fixed frame, the rotary baffle plate is provided with an embedded groove matched with the sealing ring, the sealing degree of the stop plate when the seal ring is tightly abutted is improved, and the sealing stability is further improved.

Drawings

Fig. 1 is a perspective view of a butterfly valve according to an embodiment of the present invention.

Fig. 2 is a cross-sectional structural view of an embodiment of the butterfly valve of the present application.

Fig. 3 is a partial structural view of a movement mechanism and a cutoff plate of the butterfly valve embodiment of the present application.

Fig. 4 is a partial configuration diagram of a movement mechanism and a cutoff plate according to an embodiment of the butterfly valve of the present application.

Fig. 5 is a partial structural view of a rotation damper and a fitting block in the butterfly valve according to the embodiment of the present invention.

Description of the reference numerals:

1. a valve body; 11. a seal ring; 2. a valve stem; 21. a control lever; 22. a hand wheel 23 and a fixed block; 231. a control slot; 232. a circular groove; 24. transferring the block; 241. a transfer tank; 3. a butterfly plate; 31. a butterfly frame; 32. a side plate; 33. a flexible connector; 34. a fitting block; 4. a cut-off plate; 41. a fixing frame; 42. rotating the baffle; 5. a rotating seat; 51. an eccentric cam; 52. engaging teeth; 53. a straight groove; 54. a slider; 55. a rodent; 6. a limiting rod; 61. a limiting cylinder.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses butterfly valve that leakproofness is good. As shown in fig. 1 and 2, a butterfly valve with good sealing performance comprises a valve body 1, a valve rod 2 and a butterfly plate 3, wherein the valve body 1 is of a hollow structure, the valve rod 2 is rotatably installed on the valve body 1, the butterfly plate 3 is connected to the valve rod 2, the valve rod 2 is located in the middle of the butterfly plate 3, when a medium of a pipeline flows through the valve body 1 and the medium needs to be cut off, the valve rod 2 is rotated to drive the butterfly plate 3 to rotate and cover the radial section of the valve body 1, and the cut-off effect can be realized.

As shown in fig. 2, an annular seal ring 11 is disposed on an inner wall of the valve body 1, the seal ring 11 is made of rubber, the seal ring 11 is in a hollow circular truncated cone shape, and specifically, when the butterfly plate 3 covers a radial cross section of the valve body 1, an inner diameter of the seal ring 11 gradually decreases from a side close to the butterfly plate 3 to a side far away from the butterfly plate 3.

As shown in fig. 2 and 3, the butterfly plate 3 includes a butterfly frame 31, side plates 32, a cut-off plate 4, and a flexible link 33. Specifically, butterfly frame 31 is hollow frame shape structure, and butterfly frame 31's cross-section is the arc to effectively avoid butterfly plate 3 and the condition that 1 inner wall of valve body interfered, inside valve rod 2 wore to establish and is fixed in butterfly frame 31, curb plate 32 and cut off board 4 all were the disc-shaped, curb plate 32 and cut off board 4 and connect respectively in butterfly frame 31's both sides, and flexible connectors 33 connects between cut off board 4 and butterfly frame 31, makes butterfly plate 3 wholly be discoid. The flexible connecting piece 33 is specifically a sealing strip, the sealing strip is rubber material, the sealing strip is cyclic annular and is the wavy extension, makes the sealing strip have certain deformation space, and one side fixed connection of sealing strip is in the edge of cut-off board 4, opposite side fixed connection in butterfly frame 31 to make the whole airtight structure that is of butterfly board 3, and make cut-off board 4 have mobilizable space for butterfly frame 31.

In order to control the stop plate 4 to move relative to the butterfly frame 31, a moving mechanism is arranged in the butterfly frame 31, the moving mechanism comprises a rotating seat 5 and an eccentric cam 51, the rotating seat 5 is rotatably mounted on the butterfly frame 31 and is positioned below the valve rod 2, the eccentric cam 51 is rotatably mounted on the butterfly frame 31 and is positioned between the rotating seat 5 and the stop plate 4, meshing teeth 52 are fixed on the edge of the rotating seat 5 and part of the edge of the eccentric cam 51, and the rotating seat 5 and the eccentric cam 51 are meshed with each other through the meshing teeth 52, so that the rotating seat 5 can drive the eccentric cam 51 to rotate when rotating.

As shown in fig. 3 and 4, the cutoff plate 4 includes a fixed frame 41 and a rotary baffle 42, the fixed frame 41 is ring-shaped, the fixed frame 41 is fixedly connected to the weather strip, the fixed frame 41 is rotatably connected to the rotary baffle 42, the rotary baffle 42 is disc-shaped, and the rotary baffle 42 is used for cutting off the medium of the pipeline. The straight groove 53 is horizontally formed in the fixed frame 41, the straight groove 53 is connected with the sliding block 54 in a sliding mode, the sliding direction of the sliding block 54 is perpendicular to the rotating axis of the eccentric cam 51, the sliding block 54 is connected with the eccentric cam 51 in a rotating mode, when the eccentric cam 51 rotates, the sliding block 54 is driven to slide along the straight groove 53, meanwhile, the eccentric cam 51 is eccentrically arranged due to the rotating axis, thrust on the fixed frame 41 is generated, the fixed frame 41 and the rotary baffle 42 move axially along the valve body 1 and are close to the sealing ring 11, then the rotary baffle 42 and the fixed frame 41 are abutted against the sealing ring 11, sealing of a radial section inside the valve body 1 is achieved, in the process of rotating the butterfly plate 3, a gap can be reserved between the butterfly plate 3 and the inner wall of the valve body 1, after the butterfly plate 3 rotates to a preset position, the stop plate 4 is moved again, the rotary baffle 42 is abutted against the sealing ring 11, abrasion of the butterfly plate 3 and the inner wall of the valve body 1 is reduced, durability of the butterfly valve is improved, and sealing performance of the butterfly valve is improved.

As shown in fig. 3 and 5, the sliding block 54 and the rotation blocking plate 42 are fixed with engaging teeth 55, and when the sliding block 54 slides by the rotation of the eccentric cam 51, the rotation blocking plate 42 is rotated by the teeth 55. A plurality of embedded blocks 34 are fixed on one side surface of the rotating baffle plate 42, which is far away from the valve rod 2, the embedded blocks 34 are distributed at intervals along the circumferential direction of the rotating baffle plate 42, the embedded blocks 34 are protruded towards the rotating direction of the rotating baffle plate 42, and a plurality of embedded grooves are formed in the inner wall of the sealing ring 11 along the circumferential direction; before the baffle plate 42 is close to the sealing ring 11, the embedding block 34 is staggered with the embedding groove, and in the process that the baffle plate 42 is abutted against the sealing ring 11, the sliding block 54 drives the baffle plate 42 to rotate, so that the embedding block 34 is clamped in the embedding groove, the connecting area of the baffle plate 42 and the sealing ring 11 is increased, and the sealing degree of the stop plate 4 and the sealing ring 11 is improved.

The lateral wall of valve rod 2 is fixed with gag lever post 6, changes a spacing section of thick bamboo 61 that baffle 42 is fixed with hollow structure, and gag lever post 6 is located to a spacing 61 cover, and is further, and spacing 61 can rotate to connect and sliding connection in gag lever post 6 to play the guide effect for changeing the removal and the rotation of baffle 42.

As shown in fig. 2 and 3, in order to control the operation of the moving mechanism, the valve rod 2 is provided with an adjusting mechanism, the adjusting mechanism includes a control rod 21, a fixed block 23 and a transfer block 24, the inside of the valve rod 2 is of a hollow structure, the control rod 21 penetrates through the valve rod 2, one end of the control rod 21 penetrates through the valve rod 2 and is fixedly connected with a hand wheel 22, the inner wall of the valve rod 2 is provided with a circular groove 232 and a control groove 231 which are communicated with each other, the control groove 231 is positioned above the circular groove 232, the cross section of the circular groove 232 is circular, the cross section of the control groove 231 is square, the fixed block 23 is fixedly connected to the side wall of the control rod 21, the fixed block 23 is a square block, and the cross-sectional area of the circular groove 232 is larger than that of the fixed block 23; the transfer block 24 is fixed at one end of the control rod 21 close to the rotating seat 5, the transfer block 24 is a square block, the rotating seat 5 is provided with a transfer groove 241, and the transfer groove 241 is a square groove.

When the butterfly plate 3 needs to be controlled to rotate, the control rod 21 is moved to enable the fixing block 23 to be clamped in the control groove 231, so that the valve rod 2 can be driven to rotate when the control rod 21 is rotated, and the butterfly plate 3 is controlled to rotate; when the moving mechanism needs to be controlled to operate, the moving control rod 21 enables the transfer block 24 to be clamped in the transfer groove 241, so that the rotating seat 5 can be driven to rotate when the moving control rod 21 is rotated, the fixing block 23 is located in the circular groove 232, the valve rod 2 cannot be driven to rotate, the moving mechanism is controlled to operate, and the stop plate 4 is controlled to move.

The implementation principle of the butterfly valve with good sealing performance is as follows:

when the medium in the pipeline needs to be cut off, the control rod 21 is moved, the fixed block 23 is clamped in the control groove 231, the hand wheel 22 is rotated to drive the valve rod 2 to rotate, the butterfly plate 3 is rotated by 90 degrees, and the butterfly plate 3 covers the radial section in the valve body 1; then the control rod 21 is moved downwards, the fixing block 23 is separated from the control groove 231, the transfer block 24 is clamped in the transfer groove 241, the hand wheel 22 is rotated to drive the rotating seat 5 to rotate, the stop plate 4 is driven to move close to the sealing ring 11 under the transmission action of the eccentric cam 51 and the sliding block 54, meanwhile, the rotating baffle plate 42 rotates, finally, the rotating baffle plate 42 is abutted against the sealing ring 11, and the embedded block 34 is embedded in the embedded groove, so that the sealing of the butterfly valve is realized.

This detailed description is to be construed as illustrative only and is not limiting, and modifications of the detailed description, which are not inventive and may be made by persons skilled in the art after reading this description are made without departing from the spirit of the invention and within the scope of the appended claims.

Claims

1. The utility model provides a butterfly valve that leakproofness is good, includes valve body (1), its characterized in that: valve rod (2) are installed to the rotatable formula of valve body (1), valve rod (2) are connected with butterfly plate (3), butterfly plate (3) include butterfly frame (31), connect in curb plate (32), sliding connection of butterfly frame (31) in the closing plate (4) of butterfly frame (31) with connect in butterfly frame (31) with cut off flexible connecting piece (33) between board (4), butterfly frame (31) fixed connection in valve rod (2), valve body (1) inner wall be provided with be used for with cut off sealing washer (11) of board (4) butt, be close to certainly one side of butterfly plate (3) is to keeping away from one side of butterfly plate (3) the internal diameter of sealing washer (11) reduces gradually, butterfly frame (31) inside is provided with and is used for driving cut off board (4) edge valve body (1) axial displacement's moving mechanism, valve rod (2) are provided with the guiding mechanism who is used for controlling moving mechanism and operates.

2. The butterfly valve with good sealing performance according to claim 1, wherein: the moving mechanism comprises a rotating seat (5) and an eccentric cam (51) which are rotatably mounted on the butterfly frame (31), meshing teeth (52) which are meshed with each other are arranged on the edges of the rotating seat (5) and the eccentric cam (51), and the eccentric cam (51) is connected to the stopping plate (4).

3. The butterfly valve with good sealing performance according to claim 2, wherein: the adjusting mechanism comprises a control rod (21) penetrating through the valve rod (2), a fixing block (23) connected to the side wall of the control rod (21) and a transfer block (24) connected to the control rod (21), the fixing block (23) and the transfer block (24) are polygonal blocks, a round groove (232) and a control groove (231) matched with the fixing block (23) are formed in the valve rod (2), and a transfer groove (241) matched with the transfer block (24) is formed in the rotating seat (5).

4. A butterfly valve with good sealing performance according to claim 3, wherein: the fixing block (23) is clamped with the control groove (231), and the transfer block (24) is clamped with the transfer groove (241).

5. A butterfly valve with good sealing performance according to claim 3, wherein: the cross-sectional area of the circular groove (232) is larger than that of the fixing block (23).

6. The butterfly valve with good sealing performance according to claim 1, wherein: the flexible connecting piece (33) is an annular sealing strip extending in a wave shape, and two sides of the sealing strip are respectively connected with the cut-off plate (4) and the butterfly frame (31).

7. The butterfly valve with good sealing performance according to claim 2, wherein: cut-off board (4) including connect in fixed frame (41) of flexible connectors (33) with can rotate connect in the commentaries on classics baffle (42) of fixed frame (41), fixed frame (41) sliding connection has slider (54), slider (54) with eccentric cam (51) rotate and are connected, slider (54) with it all is provided with intermeshing's rodent (55) to change baffle (42), fixed frame (41) with change baffle (42) all butt in sealing washer (11), it deviates from to change baffle (42) a side of valve rod (2) is equipped with a plurality of gomphosis pieces (34), sealing washer (11) seted up a plurality of with the gomphosis groove of gomphosis piece (34) joint.

8. The butterfly valve with good sealing performance according to claim 7, wherein: the fixed frame (41) is provided with a straight groove (53), and the sliding block (54) is connected to the straight groove (53) in a sliding manner.

9. The butterfly valve with good sealing performance according to claim 1, wherein: the valve rod (2) is provided with a limiting rod (6), and the stop plate (4) is provided with a limiting cylinder (61) sleeved on the limiting rod (6).

10. A butterfly valve with good sealing performance according to claim 3, wherein: one end of the control rod (21) penetrates out of the valve rod (2) and is fixedly connected with a hand wheel (22).