CN115654194A

CN115654194A - Bidirectional sealing butterfly valve and use method thereof

Info

Publication number: CN115654194A
Application number: CN202211219971.6A
Authority: CN
Inventors: 仇立强
Original assignee: Jiangsu Gaoda Valve Co ltd
Current assignee: Jiangsu Gaoda Valve Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-01-31
Anticipated expiration: 2042-10-08
Also published as: CN115654194B

Abstract

The invention relates to the technical field of bidirectional sealing butterfly valves, in particular to a bidirectional sealing butterfly valve and a using method thereof, wherein the bidirectional sealing butterfly valve comprises a valve body, the left part and the right part of the upper end surface of the valve body are respectively provided with a pressure relief mechanism, the inside of the front end surface of the valve body is rotatably connected with a rotating sleeve through a bearing, the inside of the rotating sleeve is rotatably connected with a transmission column through a bearing, the outsides of the transmission column and the rotating sleeve are respectively and fixedly connected with a connecting block, one end of the connecting block, far away from the transmission column and the rotating sleeve, is respectively and fixedly connected with a second valve plate and a first valve plate, the outsides of the transmission column and the rotating sleeve are respectively and fixedly connected with a first worm wheel and a second worm wheel, and a rubber sealing block is arranged inside the valve body; the invention can effectively solve the problems that the pressure bearing of the butterfly plate cannot be reduced, so that the valve seat is leaked, the bidirectional sealing butterfly valve is inconvenient to rapidly disassemble and assemble, and the automatic pressure discharge cannot be regulated according to different pressures because a pressure relief regulating mechanism is not provided in the prior art.

Description

Bidirectional sealing butterfly valve and use method thereof

Technical Field

The invention relates to the technical field of bidirectional sealing butterfly valves, in particular to a bidirectional sealing butterfly valve and a using method thereof.

Background

A butterfly valve, also called a flap valve, which can be used for on-off control of low-pressure pipeline media, is a valve in which a closing member (a valve clack or a butterfly plate) is a disk and rotates around a valve shaft to open and close. Can be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The main functions of cutting off and throttling are realized on the pipeline.

In the application number: the patent document of CN207830576U discloses a two-way butterfly valve, including valve body, disk seat, butterfly plate and valve rod, be provided with the toper surfacing layer on the disk seat, be provided with on the butterfly plate with the sealed complex butterfly plate sealing washer of toper surfacing layer, set up on the butterfly plate and be provided with the annular that is used for installing the butterfly plate sealing washer, circle in the butterfly plate sealing washer and be provided with the elasticity clamping ring, the periphery of elasticity clamping ring supports on the inner circle wall of butterfly plate sealing washer, the inner wall of elasticity clamping ring supports on the groove bottom of annular.

However, the following disadvantages still exist in the practical application process:

first, the butterfly valve receives self butterfly plate structure to influence only can the forward pressure-bearing seal, leads to sealing performance obviously not good, and the rigidity of its butterfly plate often not enough can't fold and reduce the pressure-bearing and make the condition that the disk seat reveals appear.

Second, the screw outside pipeline is installed comparatively loaded down with trivial details, leads to inconvenient when the later stage is maintained and is overhauld carrying out quick dismantlement installation to the two-way seal butterfly valve.

Thirdly, the pressure relief adjusting mechanism is not provided, which results in the situation that the automatic pressure discharge can not be adjusted according to different pressures.

Disclosure of Invention

The invention aims to solve the defects in the prior art and solve the problems that the situation that a valve seat is leaked due to the fact that a butterfly plate cannot be folded to reduce pressure bearing, a bidirectional sealing butterfly valve is inconvenient to rapidly disassemble and assemble, and automatic pressure discharge cannot be adjusted according to different pressures due to the fact that a pressure relief adjusting mechanism is not provided.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a two way seal butterfly valve, includes the valve body, the valve body up end left and right sides portion all is provided with pressure relief mechanism, the valve body is preceding terminal surface inside is rotated through the bearing and is connected with the rotation cover, it is connected with the transmission post to rotate through the bearing inside the rotation cover, the transmission post with rotate the outside equal fixedly connected with connecting block of cover, the connecting block is kept away from the transmission post and is overlapped one end with rotating fixedly connected with second valve block respectively, the transmission post overlaps outside first worm wheel of fixedly connected with and the second worm wheel with rotating respectively, the inside rubber seal piece that is provided with of valve body, the terminal surface all is provided with the connector about the valve body, the edge all is provided with T type spout about the terminal surface around the valve body, T type spout inner chamber sliding connection has T type traveller, the equal fixedly connected with second fixed block of terminal surface before the valve body, the inside first worm and the second worm of being connected with respectively through the bearing of second fixed block, first worm and second worm up end difference fixedly connected with first gear and second gear.

Furthermore, the pressure relief mechanism comprises a fixed cylinder, a sealing ball, a pushing column, a sealing disc, a sealing ring, a first pushing disc, a buffer spring, a second pushing disc, a threaded rod, a crank and a pressure relief opening, wherein the left part and the right part of the upper end surface of the valve body are fixedly communicated with the fixed cylinder, the lower edge of the inner cavity of the fixed cylinder is fixedly connected with the sealing ring, the sealing ring is made of rubber, and the pressure relief opening is formed outside the fixed cylinder;

furthermore, a threaded rod is connected to the upper end face of the fixed cylinder in a threaded manner, a crank is fixedly connected to the upper end face of the threaded rod, a second pushing disc is rotatably connected to the lower end face of the threaded rod through a bearing, a buffer spring is fixedly connected to the lower end face of the second pushing disc, and a first pushing disc is fixedly connected to one end, far away from the second pushing disc, of the buffer spring;

furthermore, the lower part of the inner cavity of the fixed cylinder is fixedly connected with a sealing disc, the sealing disc is internally connected with a pushing column in a sliding manner, the lower end face of the first pushing disc is fixedly connected with the pushing column, the lower end face of the pushing column is fixedly connected with a sealing ball, and a rubber layer is arranged outside the sealing ball;

furthermore, an insertion groove is formed in one end, close to the second valve plate, of the first valve plate, an insertion block is fixedly connected to one end, close to the first valve plate, of the second valve plate, a handle is fixedly connected to the upper end face of the second gear, the first gear is connected with the second gear in a meshed mode, and the first worm and the second worm are respectively connected with a first worm wheel and a second worm wheel in a meshed mode;

furthermore, a through hole is formed in the inner portion of the upper end face of the transmission column, a cylinder is rotatably connected to the inner portion of the through hole through a bearing, a transmission worm wheel is fixedly connected to the outer portion of the cylinder, a first fixing block is fixedly connected to the rear end face of the valve body, a transmission worm is rotatably connected to the inner portion of the first fixing block through a bearing, and the transmission worm is connected with the transmission worm wheel in a meshed mode;

furthermore, the front end surface and the rear end surface of the cylinder are respectively fixedly connected with a first rotating block and a second rotating block, the upper end surface and the lower end surface of the first rotating block and the second rotating block are respectively and rotatably connected with a first pull rod and a second pull rod through rotating shafts, and one ends of the first pull rod and the second pull rod, which are far away from the first rotating block and the second rotating block, are rotatably connected with a square block through rotating shafts;

furthermore, a T-shaped sliding column is fixedly connected to the lower end face of the square block, a supporting rod is rotatably connected to the upper end face and the lower end face of the square block through a rotating shaft, a clamping block is fixedly connected to one end, away from the square block, of the supporting rod, a limiting column is uniformly and fixedly connected to the inside of the clamping block, grooves are formed in the surfaces, close to each other, of the supporting rods, the inner cavity of each groove is slidably connected with the sliding column, a spring is fixedly connected to the outside of the sliding column, and one end, away from the sliding column, of the spring is fixedly connected with a valve body;

furthermore, a sealing groove is formed in the bottom of the inner cavity of the connecting port, a filter screen cylinder is connected to the inner cavity of the sealing groove in an inserting mode, and U-shaped limiting frames are fixedly connected to the left edge and the right edge of the front end face and the right edge of the rear end face of the valve body;

a use method of a bidirectional sealing butterfly valve comprises the following steps:

s1, sliding a filter screen cylinder into an inner cavity of a valve body, enabling the filter screen cylinder to be in plug-in connection with a sealing groove, then utilizing a connector to be in plug-in connection with an external pipeline, driving a transmission worm gear to drive a cylinder by rotating a transmission worm, then enabling the cylinder to rotate a first rotating block and a second rotating block to pull a first pull rod and a second pull rod to drive a square block, enabling the square block to be connected into the inner cavity of a T-shaped sliding chute by utilizing a T-shaped sliding chute, and enabling the square block to pull a support rod by utilizing a rotating shaft to drive a clamping block and a limiting column, so that the support rod is matched with a U-shaped limiting frame to drive the clamping block to mutually approach to clamp and pull the external pipeline, enabling the limiting column to be in plug-in limited with a joint of the external pipeline, and then enabling the valve body to be installed with the external pipeline;

s2, rotating a second gear to drive a first gear by holding a handle, then simultaneously rotating a second gear and the first gear to drive a first worm and a second worm to drive a first worm wheel and a second worm wheel to drive a transmission column and a rotation sleeve, so that the transmission column and the rotation sleeve drive a first valve plate and a second valve plate to approach each other by using a connecting block, the second valve plate is plugged and sealed by using an inserting block and an inserting groove of the first valve plate, and after the second valve plate is plugged and combined by using the inserting block and the inserting groove of the first valve plate, an inner cavity of the valve body is sealed by extruding a rubber sealing block;

s3, the tension of the buffer spring is adjusted through calibration by holding the crank and rotating the threaded rod to push the second pushing disc to extrude the buffer spring, so that when the pressure in the inner cavity of the valve body is too high, the sealing ball is extruded to push the pushing column to jack up the first pushing disc to open the fixed cylinder, the pressure enters the inner cavity of the fixed cylinder through the sealing ring, and then the sealing ring is discharged and decompressed through the decompression port;

s4, driving the first worm wheel and the second worm wheel to drive the transmission column and the rotating sleeve through the first worm and the second worm, and enabling the transmission column and the rotating sleeve to drive the first valve plate and the second valve plate to be away from each other through the connecting block to discharge gas and fluid;

compared with the prior art, the invention has the advantages and positive effects that,

1. according to the butterfly valve, the filter screen cylinder slides into the inner cavity of the valve body, the filter screen cylinder is in plug-in connection with the sealing groove, the connecting port is then in plug-in connection with an external pipeline, the transmission worm is rotated to drive the worm gear to drive the cylinder, the cylinder is rotated to drive the first rotating block and the second rotating block to drive the first pull rod and the second pull rod to drive the square block, the square block is connected into the inner cavity of the T-shaped sliding chute through the T-shaped sliding chute, the square block is used for driving the supporting rod to drive the clamping block and the limiting column through the rotating shaft, the supporting rod is matched with the U-shaped limiting frame to drive the clamping block to mutually approach to clamp and pull the external pipeline, the limiting column is in plug-in limiting connection with the joint of the external pipeline, the valve body and the external pipeline can be conveniently installed, the filter screen cylinder and the sealing groove are in plug-in sealing through extrusion of the external pipeline, and the butterfly valve with the existing bidirectional sealing structure is prevented from being troublesome in that the conventional butterfly valve that the bidirectional sealing is inconvenient to be quickly disassembled and installed through the external pipeline through screws when maintenance is carried out.

2. According to the invention, the handle is held to rotate the second gear to drive the first gear, then the second gear and the first gear simultaneously rotate the first worm and the second worm to drive the first worm wheel and the second worm wheel to drive the transmission column and the rotation sleeve, so that the transmission column and the rotation sleeve drive the first valve plate and the second valve plate to approach each other by using the connecting block, the second valve plate is plugged and sealed by using the plugging block and the slot of the first valve plate, and after the second valve plate is plugged and combined by using the plugging block and the slot of the first valve plate, the inner cavity of the valve body is sealed by extruding the rubber sealing block, so that the situation that the conventional butterfly valve can only be positively pressurized and sealed due to the influence of the self structure, the sealing performance is obviously poor, and the rigidity of the butterfly plate is often insufficient, the butterfly plate can not be folded to reduce the pressure and the valve seat is leaked is avoided.

3. According to the invention, the tension of the buffer spring is calibrated and adjusted by holding the crank and rotating the threaded rod to push the second pushing disc to extrude the buffer spring, so that when the pressure in the inner cavity of the valve body is too high, the extruding sealing ball pushes the pushing column to jack up the first pushing disc to open the fixed cylinder, so that the pressure enters the inner cavity of the fixed cylinder through the sealing ring and is discharged and decompressed through the decompression port, and when the decompression mechanism is not used, the crank and rotating the threaded rod is held to push the second pushing disc to extrude the buffer spring to eliminate the tension, and the buffer spring pushes the pushing column to drive the sealing ball by pressing the first pushing disc, so that the sealing ball is matched with the sealing ring to seal the inner cavity of the fixed cylinder, and the trouble that the conventional bidirectional seal cannot adjust automatic pressure discharge according to different pressures due to the fact that the conventional bidirectional seal does not have a butterfly valve decompression adjusting mechanism is avoided.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged schematic view of the area A of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the valve body and pipe installation of the present invention;

FIG. 4 is a schematic view of the structure of area A in FIG. 3 according to the present invention;

FIG. 5 is a schematic view of the internal structure of the valve body according to the present invention;

FIG. 6 is a schematic view of a half-section of the valve body of the present invention;

FIG. 7 is a schematic view of the structure of area A in FIG. 6 according to the present invention;

FIG. 8 is a schematic view of a half-section structure of a stationary cylinder according to the present invention;

FIG. 9 is an enlarged view of area A of FIG. 8 according to the present invention;

FIG. 10 is a schematic view of the mounting structure of the square block of the present invention;

the reference numerals in the drawings denote:

1. a valve body; 2. a pressure relief mechanism; 201. a fixed cylinder; 202. a sealing ball; 203. pushing the column; 204. sealing the disc; 205. a seal ring; 206. a first pusher disk; 207. a buffer spring; 208. a second push disk; 209. a threaded rod; 210. a crank; 211. a pressure relief port; 3. a first rotating block; 4. a first pull rod; 5. a second pull rod; 6. a U-shaped limiting frame; 7. a T-shaped chute; 8. a support bar; 9. a groove; 10. a clamping block; 11. a limiting column; 12. a traveler; 13. a spring; 14. a first fixed block; 15. a drive worm; 16. a cylinder; 17. a drive worm gear; 18. a second turning block; 19. a filter screen cylinder; 20. a sealing groove; 21. a rubber sealing block; 22. rotating the sleeve; 23. connecting blocks; 24. a first valve plate; 25. a drive post; 26. a second valve plate; 27. a first worm gear; 28. a second worm gear; 29. a through hole; 30. a second fixed block; 31. a first worm; 32. a second worm; 33. a first gear; 34. a second gear; 35. a handle; 36. a slot; 37. inserting a block; 38. a square block; 39. a T-shaped strut; 40. and (7) connecting ports.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

A two-way sealing butterfly valve of this embodiment, refer to fig. 1-10: including valve body 1, the portion all is provided with pressure relief mechanism 2 about the valve body 1 up end, the inside rotation of end face is connected with through the bearing and rotates cover 22 before valve body 1, it rotates through the bearing and is connected with transmission post 25 to rotate the cover 22 inside, transmission post 25 and the equal fixedly connected with connecting block 23 in rotation cover 22 outside, connecting block 23 is kept away from transmission post 25 and is rotated cover 22 one end fixedly connected with second valve block 26 and first valve block 24 respectively, transmission post 25 and the rotation cover 22 outside respectively fixedly connected with first worm wheel 27 and second worm wheel 28, the inside rubber seal block 21 that is provided with of valve body 1, the end face all is provided with connector 40 about valve body 1, edge all is provided with T type spout 7 about the end face around valve body 1, the sliding connection of T type spout 7 inner chamber has T type traveller 39, the equal fixedly connected with second fixed block 30 of end face before valve body 1, inside second fixed block 30 rotates respectively through the bearing and is connected with first worm 31 and second worm 32, first worm 31 and second worm 32 up end fixedly connected with first gear 33 and second gear 34 respectively.

Wherein, pressure release mechanism 2 is including fixed section of thick bamboo 201, ball sealer 202, promotion post 203, sealed dish 204, sealing washer 205, first drive disk 206, buffer spring 207, second drive disk 208, threaded rod 209, crank 210 and pressure release port 211, the portion all fixed intercommunication has fixed section of thick bamboo 201 about the valve body 1 up end, fixed section of thick bamboo 201 inner chamber lower limb department fixedly connected with sealing washer 205, sealing washer 205 adopts the rubber material to make, fixed section of thick bamboo 201 outside is provided with pressure release port 211. The filter screen cylinder 19 slides into the inner cavity of the valve body 1, the filter screen cylinder 19 is in plug-in connection with the sealing groove 20, then the connector 40 is in plug-in connection with an external pipeline, the transmission worm 15 is rotated to drive the transmission worm wheel 17 to drive the cylinder 16, then the cylinder 16 is rotated to drive the first rotating block 3 and the second rotating block 18 to pull the first pull rod 4 and the second pull rod 5 to drive the square block 38, the square block 38 is connected into the inner cavity of the T-shaped sliding chute 7 through the T-shaped sliding chute 39, the square block 38 pulls the supporting rod 8 through the rotating shaft to drive the clamping block 10 and the limiting column 11, the supporting rod 8 is matched with the U-shaped limiting frame 6 to drive the clamping block 10 to mutually approach to clamp and pull the external pipeline, the limiting column 11 is in plug-in limiting connection with the joint of the external pipeline, the valve body 1 and the external pipeline are convenient to install, the filter screen cylinder 19 and the sealing groove 20 are extruded through the external pipeline to plug-in and seal, and the existing bidirectional sealing butterfly valve which is troublesome to install through screws and inconvenient to install the later maintenance and overhaul is avoided.

Wherein, fixed section of thick bamboo 201 up end threaded connection has threaded rod 209, and threaded rod 209 up end fixedly connected with crank 210, threaded rod 209 lower extreme face are connected with second push disk 208 through the bearing rotation, and second push disk 208 lower extreme face fixedly connected with buffer spring 207, buffer spring 207 keep away from the first push disk 206 of second push disk 208 one end fixedly connected with.

Wherein, the fixed cylinder 201 inner chamber lower part fixedly connected with sealed dish 204, sealed dish 204 inside sliding connection has the promotion post 203, and terminal surface fixedly connected with promotes post 203 under the first promotion dish 206, promotes terminal surface fixedly connected with seal ball 202 under the post 203, and the seal ball 202 outside is provided with the rubber layer.

The first valve plate 24 is provided with a slot 36 at one end close to the second valve plate 26, the second valve plate 26 is fixedly connected with an insert block 37 at one end close to the first valve plate 24, the upper end surface of the second gear 34 is fixedly connected with a handle 35, the first gear 33 is meshed with the second gear 34, and the first worm 31 and the second worm 32 are respectively meshed with the first worm wheel 27 and the second worm wheel 28. The handle 35 is held to rotate the second gear 34 to drive the first gear 33, then the second gear 34 and the first gear 33 simultaneously rotate the first worm 31 and the second worm 32 to drive the first worm wheel 27 and the second worm wheel 28 to drive the transmission column 25 and the rotating sleeve 22, so that the transmission column 25 and the rotating sleeve 22 drive the first valve plate 24 and the second valve plate 26 to approach each other by using the connecting block 23, the second valve plate 26 is plugged and sealed by using the plugging block 37 and the slot 36 of the first valve plate 24, and after the plugging and combination of the second valve plate 26 and the slot 36 of the first valve plate is completed by using the plugging block 37, the inner cavity of the valve body 1 is sealed by extruding the rubber sealing block 21, thereby avoiding the situation that the existing butterfly valve is only capable of forward pressure-bearing sealing due to the influence of the structure thereof, which results in obviously poor sealing performance, and the situation that the valve seat leakage is caused by the fact that the rigidity of the butterfly plate is often insufficient, and the butterfly plate cannot be folded and reduced in pressure-bearing.

Wherein, the inside through-hole 29 that is provided with of transmission post 25 upper end face, the inside cylinder 16 that is connected with through the bearing rotation of through-hole 29, the outside fixedly connected with transmission worm wheel 17 of cylinder 16, the first fixed block 14 of valve body 1 rear end face fixedly connected with, the inside transmission worm 15 that is connected with through the bearing rotation of first fixed block 14, transmission worm 15 meshing is connected with transmission worm wheel 17.

The front end face and the rear end face of the cylinder 16 are respectively fixedly connected with a first rotating block 3 and a second rotating block 18, the upper end face and the lower end face of the first rotating block 3 and the upper end face and the lower end face of the second rotating block 18 are respectively connected with a first pull rod 4 and a second pull rod 5 in a rotating mode through rotating shafts, and one ends, far away from the first rotating block 3 and one end, far away from the second rotating block 18, of the first pull rod 4 and one end, far away from the second rotating block 5, of the second pull rod 5 are connected with a square block 38 in a rotating mode through the rotating shafts.

The lower end face of the square block 38 is fixedly connected with a T-shaped sliding column 39, the upper end face and the lower end face of the square block 38 are rotatably connected with a supporting rod 8 through a rotating shaft, the supporting rod 8 is far away from one end of the square block 38 and is fixedly connected with a clamping block 10, a limiting column 11 is uniformly and fixedly connected inside the clamping block 10, a groove 9 is formed in the face, close to each other, of the supporting rod 8, a sliding column 12 is slidably connected to the inner cavity of the groove 9, a spring 13 is fixedly connected to the outer portion of the sliding column 12, and one end of the spring 13, far away from the sliding column 12, is fixedly connected with a valve body 1. The tension of the buffer spring 207 is adjusted through calibrating the crank 210 to rotate the threaded rod 209 to push the second push disk 208 to extrude the buffer spring 207, so that when the pressure in the inner cavity of the valve body 1 is too high, the extrusion sealing ball 202 pushes the push column 203 to jack the first push disk 206 to open the fixed cylinder 201, so that the pressure enters the inner cavity of the fixed cylinder 201 through the sealing ring 205, and then is discharged and decompressed through the decompression port 211, and when the decompression mechanism 2 is not used, the crank 210 is held to rotate the threaded rod 209 to push the second push disk 208 to extrude the buffer spring 207 to eliminate the tension, and the buffer spring 207 presses the first push disk 206 to push the push column 203 to drive the sealing ball 202, so that the sealing ball 202 is matched with the sealing ring 205 to seal the inner cavity of the fixed cylinder 201, and the trouble that the conventional bidirectional sealing butterfly valve cannot adjust the decompression mechanism to cause automatic decompression according to different pressures is avoided.

Wherein, connector 40 inner chamber bottom is provided with seal groove 20, and the equal fixedly connected with U type spacing 6 in edge about the terminal surface around the valve body 1 is connected with filter screen section of thick bamboo 19 to the 20 inner chambers plug-in connection of seal groove.

s1, sliding a filter screen cylinder 19 into an inner cavity of a valve body 1, enabling the filter screen cylinder 19 to be in plug-in connection with a sealing groove 20, then utilizing a connecting port 40 to be in plug-in connection with an external pipeline, rotating a transmission worm 15 to drive a transmission worm wheel 17 to drive a cylinder 16, then enabling the cylinder 16 to rotate a first rotating block 3 and a second rotating block 18 to pull a first pull rod 4 and a second pull rod 5 to drive a square block 38, enabling the square block 38 to be connected into an inner cavity of a T-shaped sliding chute 7 through a T-shaped sliding column 39, enabling the square block 38 to pull a supporting rod 8 through a rotating shaft to drive a clamping block 10 and a limiting column 11, enabling the supporting rod 8 to be matched with a U-shaped limiting frame 6 to drive the clamping block 10 to be close to each other to clamp and pull the external pipeline, enabling the limiting column 11 to be in plug-in and limit with a joint of the external pipeline, and enabling the valve body 1 to be installed with the external pipeline;

s2, rotating a second gear 34 to drive a first gear 33 by holding a handle 35, then simultaneously rotating the second gear 34 and the first gear 33 to drive a first worm gear 27 and a second worm gear 28 to drive a transmission column 25 and a rotating sleeve 22 by driving a first worm 31 and a second worm 32 to drive the first worm gear 27 and the second worm gear 28, so that the transmission column 25 and the rotating sleeve 22 drive a first valve plate 24 and a second valve plate 26 to approach each other by using a connecting block 23, the second valve plate 26 is plugged and sealed by using an inserting block 37 and a slot 36 of the first valve plate 24, and after the second valve plate 26 is plugged and combined by using the inserting block 37 and the slot 36 of the first valve plate, the inner cavity of the valve body 1 is sealed by extruding a rubber sealing block 21;

s3, rotating the threaded rod 209 by holding the crank 210 to push the second push disc 208 to extrude the buffer spring 207 to calibrate and adjust the tension of the buffer spring 207, so that when the pressure in the inner cavity of the valve body 1 is too high, the extrusion sealing ball 202 pushes the push column 203 to jack the first push disc 206 to open the fixed cylinder 201, so that the pressure enters the inner cavity of the fixed cylinder 201 through the sealing ring 205 and is discharged and decompressed through the decompression port 211, and when the decompression mechanism 2 is not used, rotating the threaded rod 209 by holding the crank 210 to push the second push disc 208 to extrude the buffer spring 207 to eliminate the tension, and enabling the buffer spring 207 to press the first push disc 206 to push the push column 203 to drive the sealing ball 202, so that the sealing ball 202 is matched with the sealing ring 205 to seal the inner cavity of the fixed cylinder 201;

s4, the first worm 31 and the second worm 32 drive the first worm wheel 27 and the second worm wheel 28 to drive the transmission column 25 and the rotating sleeve 22, so that the transmission column 25 and the rotating sleeve 22 drive the first valve sheet 24 and the second valve sheet 26 to be away from each other through the connecting block 23 to discharge gas, fluid and the like.

When in use, the filter screen cylinder 19 is inserted into the sealing groove 20 by sliding the filter screen cylinder 19 into the inner cavity of the valve body 1, then, after the connecting port 40 is used for splicing and connecting with an external pipeline, the transmission worm 15 is rotated to drive the transmission worm wheel 17 to drive the cylinder 16, then the cylinder 16 rotates the first rotating block 3 and the second rotating block 18 to pull the first pull rod 4 and the second pull rod 5 to drive the square block 38, so that the square block 38 is connected in the inner cavity of the T-shaped sliding chute 7 by utilizing the T-shaped sliding column 39, then the square block 38 utilizes the rotating shaft to pull the supporting rod 8 to drive the clamping block 10 and the limiting column 11, thereby the supporting rod 8 is matched with the U-shaped limiting frame 6 to drive the clamping blocks 10 to mutually approach and clamp and pull the external pipeline, the joint of the limiting column 11 and the external pipeline is inserted and limited, thereby facilitating the installation of the valve body 1 and an external pipeline, and the filter screen cylinder 19 is extruded by the external pipeline to be inserted and sealed with the sealing groove 20, then the handle 35 is held to rotate the second gear 34 to drive the first gear 33, then the second gear 34 and the first gear 33 simultaneously rotate the first worm 31 and the second worm 32 to drive the first worm wheel 27 and the second worm wheel 28 to drive the transmission column 25 and the rotating sleeve 22, so that transmission column 25 and rotary sleeve 22 drive first valve plate 24 and second valve plate 26 to approach each other by connecting block 23, so that second valve plate 26 is plugged and sealed with slot 36 of first valve plate 24 by plug 37, and after the second valve plate 26 is inserted and combined with the insertion groove 36 of the first valve plate by the insertion block 37, the inner cavity of the valve body 1 is sealed by extruding the rubber sealing block 21, so that the problem that the existing butterfly valve only can bear pressure and seal in the positive direction due to the influence of the structure of the butterfly valve, which causes the sealing performance to be obviously poor is avoided, and the rigidity of its butterfly plate often is not enough can't fold and reduce the pressure-bearing and make the condition that the disk seat revealed appear.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The utility model provides a two-way seal butterfly valve which characterized in that: including valve body (1), the portion all is provided with pressure release mechanism (2) about valve body (1) up end, the inside bearing rotation that is connected with of terminal surface before valve body (1) rotates and rotates cover (22), it rotates through the bearing to rotate cover (22) inside is connected with transmission post (25), transmission post (25) and the equal fixedly connected with connecting block (23) in rotation cover (22) outside, transmission post (25) are kept away from in connecting block (23) and are overlapped (22) one end difference fixedly connected with second valve block (26) and first valve block (24) with rotating, transmission post (25) and the cover (22) outside respectively fixedly connected with first worm wheel (27) and second worm wheel (28), the inside rubber seal piece (21) that is provided with of valve body (1), the terminal surface all is provided with connector (40) about valve body (1), the edge all is provided with T type spout (7) about valve body (1) terminal surface about terminal surface, T type spout (7) inner chamber sliding connection has T type traveller (39), the equal fixedly connected with second fixed block (30) before valve body (1), second fixed block (30) inside is connected with second worm gear (31) and second gear (31) upper end respectively with second worm wheel (31) 34).

2. The bidirectional sealing butterfly valve of claim 1, wherein the pressure relief mechanism (2) comprises a fixed cylinder (201), a sealing ball (202), a pushing column (203), a sealing disc (204), a sealing ring (205), a first pushing disk (206), a buffer spring (207), a second pushing disk (208), a threaded rod (209), a crank (210) and a pressure relief opening (211), the left and right parts of the upper end face of the valve body (1) are fixedly communicated with the fixed cylinder (201), the lower edge of an inner cavity of the fixed cylinder (201) is fixedly connected with the sealing ring (205), the sealing ring (205) is made of rubber, and the pressure relief opening (211) is formed in the outer part of the fixed cylinder (201).

3. A two-way sealing butterfly valve according to claim 2, wherein a threaded rod (209) is connected to an upper end face of the fixed cylinder (201) in a threaded manner, a crank (210) is fixedly connected to an upper end face of the threaded rod (209), a second push plate (208) is rotatably connected to a lower end face of the threaded rod (209) through a bearing, a buffer spring (207) is fixedly connected to a lower end face of the second push plate (208), and a first push plate (206) is fixedly connected to one end of the buffer spring (207) away from the second push plate (208).

4. A two-way sealing butterfly valve according to claim 2, wherein a sealing disc (204) is fixedly connected to the lower portion of the inner cavity of the fixed cylinder (201), a pushing column (203) is slidably connected to the inside of the sealing disc (204), a pushing column (203) is fixedly connected to the lower end face of the first pushing disc (206), a sealing ball (202) is fixedly connected to the lower end face of the pushing column (203), and a rubber layer is arranged outside the sealing ball (202).

5. The bidirectional sealing butterfly valve of claim 1, wherein an insertion groove (36) is formed in one end, close to the second valve plate (26), of the first valve plate (24), an insertion block (37) is fixedly connected to one end, close to the first valve plate (24), of the second valve plate (26), a handle (35) is fixedly connected to an upper end face of the second gear (34), the first gear (33) is connected with the second gear (34) in a meshed mode, and the first worm (31) and the second worm (32) are respectively connected with a first worm wheel (27) and a second worm wheel (28) in a meshed mode.

6. The bidirectional sealing butterfly valve of claim 1, wherein a through hole (29) is formed in the inner portion of the upper end face of the transmission column (25), a cylinder (16) is rotatably connected to the inner portion of the through hole (29) through a bearing, a transmission worm wheel (17) is fixedly connected to the outer portion of the cylinder (16), a first fixing block (14) is fixedly connected to the rear end face of the valve body (1), a transmission worm (15) is rotatably connected to the inner portion of the first fixing block (14) through a bearing, and the transmission worm (15) is connected to the transmission worm wheel (17) in a meshed mode.

7. The bidirectional sealing butterfly valve of claim 6, wherein a first rotating block (3) and a second rotating block (18) are fixedly connected to front and rear end faces of the cylinder (16), a first pull rod (4) and a second pull rod (5) are rotatably connected to upper and lower end faces of the first rotating block (3) and the second rotating block (18) through rotating shafts, and one ends of the first pull rod (4) and the second pull rod (5) far away from the first rotating block (3) and the second rotating block (18) are rotatably connected to the square block (38) through rotating shafts.

8. The bidirectional sealing butterfly valve according to claim 1, wherein a T-shaped sliding column (39) is fixedly connected to the lower end face of the square block (38), a support rod (8) is rotatably connected to the upper end face and the lower end face of the square block (38) through a rotating shaft, a clamping block (10) is fixedly connected to one end of the support rod (8) far away from the square block (38), a limiting column (11) is uniformly and fixedly connected to the inside of the clamping block (10), grooves (9) are formed in the surfaces, close to each other, of the support rod (8), the sliding column (12) is slidably connected to the inner cavity of each groove (9), a spring (13) is fixedly connected to the outside of the sliding column (12), and the spring (13) is fixedly connected to one end of the sliding column (12) far away from the valve body (1).

9. The bidirectional sealing butterfly valve according to claim 1, wherein a sealing groove (20) is formed in the bottom of the inner cavity of the connecting port (40), a filter screen cylinder (19) is connected to the inner cavity of the sealing groove (20) in an inserting manner, and U-shaped limiting frames (6) are fixedly connected to the left edge and the right edge of the front end surface and the rear end surface of the valve body (1).

10. The use method of the bidirectional sealing butterfly valve according to any one of claims 1 to 9, characterized by comprising the following steps:

s1, a filter screen cylinder (19) is slid into an inner cavity of a valve body (1) to enable the filter screen cylinder (19) to be in plug connection with a sealing groove (20), then a connecting port (40) is used for being in plug connection with an external pipeline, a transmission worm (15) is rotated to drive a transmission worm wheel (17) to drive a cylinder (16), then the cylinder (16) is rotated to drive a first rotating block (3) and a second rotating block (18) to pull a first pull rod (4) and a second pull rod (5) to drive a square block (38), the square block (38) is connected into the inner cavity of a T-shaped sliding chute (7) through a T-shaped sliding chute (39), the square block (38) is pulled to drive a clamping block (10) and a limiting column (11) through a rotating shaft, the supporting rod (8) is matched with a U-shaped limiting frame (6) to drive the clamping block (10) to mutually approach to clamp and pull the external pipeline, the limiting column (11) is plugged with a joint of the external pipeline, and then the valve body (1) is installed with the external pipeline;

s2, rotating a second gear (34) to drive a first gear (33) by holding a handle (35), then enabling the second gear (34) and the first gear (33) to simultaneously rotate a first worm (31) and a second worm (32) to drive a first worm wheel (27) and a second worm wheel (28) to drive a transmission column (25) and a rotating sleeve (22), so that the transmission column (25) and the rotating sleeve (22) drive a first valve plate (24) and a second valve plate (26) to approach each other by utilizing a connecting block (23), enabling the second valve plate (26) to be plugged and sealed by utilizing an inserting block (37) and an inserting groove (36) of the first valve plate (24), and after the second valve plate (26) is plugged and combined by utilizing the inserting block (37) and the inserting groove (36) of the first valve plate, sealing an inner cavity of the valve body (1) by extruding a rubber sealing block (21);

s3, rotating a threaded rod (209) by holding a crank (210) to push a second pushing disc (208) to extrude the buffer spring (207) to calibrate and adjust the tension of the buffer spring (207), so that when the pressure in the inner cavity of the valve body (1) is too high, an extruding sealing ball (202) pushes a pushing column (203) to jack a first pushing disc (206) to open a fixed cylinder (201), the pressure enters the inner cavity of the fixed cylinder (201) through a sealing ring (205), and then is discharged and decompressed through a decompression port (211), and when a pressing mechanism (2) is not used, the rotating threaded rod (209) by holding the crank (210) pushes the second pushing disc (208) to extrude the buffer spring (207) to eliminate the tension, the buffer spring (207) presses the first pushing disc (206) to push the pushing column (203) to drive the sealing ball (202), and the sealing ball (202) is matched with the sealing ring (205) to seal the inner cavity of the fixed cylinder (201);

s4, the first worm (27) and the second worm (28) are driven by the first worm (31) and the second worm (32) to drive the transmission column (25) and the rotating sleeve (22), so that the transmission column (25) and the rotating sleeve (22) drive the first valve plate (24) and the second valve plate (26) to be away from each other through the connecting block (23) to discharge gas and fluid.