CN115654194B

CN115654194B - Bidirectional sealing butterfly valve and use method thereof

Info

Publication number: CN115654194B
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: 2023-07-25
Anticipated expiration: 2042-10-08
Also published as: CN115654194A

Abstract

The invention relates to the technical field of bidirectional sealing butterfly valves, in particular to a bidirectional sealing butterfly valve and a use 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 rotationally connected with a rotating sleeve through a bearing, the inside of the rotating sleeve is rotationally connected with a transmission column through the bearing, the outside of the transmission column and the rotating sleeve are respectively fixedly connected with a connecting block, one ends of the connecting blocks, which are far away from the transmission column and the rotating sleeve, are respectively fixedly connected with a second valve plate and a first valve plate, the outside of the transmission column and the rotating sleeve is respectively fixedly connected with a first worm wheel and a second worm wheel, and a rubber sealing block is arranged in the valve body; the invention can effectively solve the problems that the pressure bearing cannot be reduced by the folding butterfly plate in the prior art, so that the valve seat is leaked, the two-way sealing butterfly valve is inconvenient to disassemble and install rapidly, and the pressure release adjusting mechanism is not provided, so that the automatic pressure release cannot be adjusted according to different pressures.

Description

Bidirectional sealing butterfly valve and use method thereof

Technical Field

The invention relates to the technical field of two-way sealing butterfly valves, in particular to a two-way sealing butterfly valve and a use method thereof.

Background

Butterfly valves, also known as flap valves, are used for the on-off control of low pressure pipeline media, and refer to valves in which the closure member (flap or butterfly plate) is a disk that rotates about the valve axis to achieve opening and closing. Can be used for controlling the flow of various 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 application number is: 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 weld stack on the disk seat, be provided with on the butterfly plate with toper weld stack sealing fit's butterfly plate sealing washer, set up the annular that is used for installing the butterfly plate sealing washer on the butterfly plate, be provided with the elasticity clamping ring on the inner circle of butterfly plate sealing washer, 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 tank bottom of annular.

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

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

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

Third, the pressure release adjusting mechanism is not provided, so that the automatic pressure release cannot 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 automatic pressure discharge cannot be regulated according to different pressures because the butterfly plate cannot be folded to reduce pressure bearing so that the valve seat leaks, the bidirectional sealing butterfly valve is inconvenient to disassemble and install rapidly, and a pressure release regulating mechanism is not provided.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a two-way seal butterfly valve, includes the valve body, the portion all is provided with relief mechanism about the valve body up end, the terminal surface is inside to be connected with the rotation cover through the bearing rotation before the valve body, the rotation cover is inside to be connected with the drive post through the bearing rotation, the equal fixedly connected with connecting block of drive post and rotation cover outside, the drive post is kept away from to the connecting block and rotation cover one end is fixedly connected with second valve block and first valve block respectively, the drive post is fixedly connected with first worm wheel and second worm wheel respectively with rotation cover outside, the valve body is inside to be provided with the rubber seal piece, the terminal surface all is provided with the connector about the valve body, terminal surface all is provided with T type spout about the valve body, T type spout inner chamber sliding connection has T type traveller, the equal fixedly connected with second worm of terminal surface before the valve body, the inside rotation of second fixed block is connected with first worm and second worm respectively through the bearing, first worm and second worm up end is fixedly connected with first gear and second gear respectively.

Still further, the pressure release 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 release opening, wherein the left and right parts of the upper end surface of the valve body are fixedly communicated with the fixed cylinder, the sealing ring is fixedly connected with the lower edge of the inner cavity of the fixed cylinder, the sealing ring is made of rubber materials, and the pressure release opening is arranged outside the fixed cylinder;

further, the upper end surface of the fixed cylinder is in threaded connection with a threaded rod, the upper end surface of the threaded rod is fixedly connected with a crank, the lower end surface of the threaded rod is rotationally connected with a second pushing disc through a bearing, the lower end surface of the second pushing disc is fixedly connected with a buffer spring, and one end, far away from the second pushing disc, of the buffer spring is fixedly connected with a first pushing disc;

further, a sealing disc is fixedly connected to the lower portion of the inner cavity of the fixed cylinder, a pushing column is slidably connected to the inside of the sealing disc, a pushing column is fixedly connected to the lower end face of the first pushing disc, a sealing ball is fixedly connected to the lower end face of the pushing column, and a rubber layer is arranged on the outside of the sealing ball;

furthermore, a slot 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 in meshed connection with the second gear, and a first worm wheel and a second worm wheel are respectively in meshed connection with the first worm and the second worm;

further, a through hole is formed in the upper end face of the transmission column, a cylinder is connected in the through hole in a rotating mode through a bearing, a transmission worm wheel is fixedly connected to the outside of the cylinder, a first fixed block is fixedly connected to the rear end face of the valve body, a transmission worm is connected in the first fixed block in a rotating mode through the bearing, and the transmission worm is connected with the transmission worm wheel in a meshed mode;

further, the front end face and the rear end face of the cylinder are respectively and fixedly connected with a first rotating block and a second rotating block, the upper end face and the lower end face of the first rotating block and the lower end face of 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, far away from the first rotating block and the second rotating block, of the first pull rod and the second pull rod are rotatably connected with square blocks through rotating shafts;

still further, the terminal surface fixedly connected with T type traveller under the square piece, the terminal surface is connected with the bracing piece about the square piece through the pivot rotation, bracing piece keeps away from square piece one end fixedly connected with clamp splice, the inside even fixedly connected with spacing post of clamp splice, the bracing piece all is provided with the recess near the face each other, recess inner chamber sliding connection has the traveller, the outside fixedly connected with spring of traveller, spring keeps away from traveller one end fixedly connected with valve body;

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

the application method of the two-way sealing butterfly valve comprises the following steps:

s1, sliding a filter screen cylinder into an inner cavity of a valve body to enable the filter screen cylinder to be in plug connection with a sealing groove, then enabling a connecting port to be in plug connection with an external pipeline, driving a worm wheel to drive a cylinder through rotation driving worm drive, 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 in the inner cavity of the T-shaped sliding groove through a T-shaped sliding groove, enabling the square block to drive a clamping block and a limiting column through a rotating shaft to pull a supporting rod, enabling the supporting rod to be mutually close to the clamping block to clamp and pull the external pipeline in cooperation with a U-shaped limiting frame, enabling the limiting column to be in plug connection limiting with a joint of the external pipeline, and enabling the valve body to be installed with the external pipeline;

s2, a second gear is held to rotate to drive a first gear, then the second gear and the first gear simultaneously rotate a first worm and a second worm to drive a first worm wheel and a second worm wheel to drive a driving column and a rotating sleeve, so that the driving column and the rotating sleeve drive a first valve block and a second valve block to be close to each other by using a connecting block, the second valve block is plugged and sealed by using a plug block and a slot of the first valve block, and the inner cavity of a valve body is sealed by extruding a rubber sealing block after the plug block and the slot of the first valve block are plugged and combined;

s3, pushing a second pushing disc to squeeze the buffer spring to calibrate and adjust the tension of the buffer spring by holding a crank rotating threaded rod, so that when the pressure in the inner cavity of the valve body is overlarge, a sealing ball is pushed by a pushing column to jack up a first pushing disc to open a fixed cylinder, so that the pressure enters the inner cavity of the fixed cylinder through a sealing ring, then the pressure is discharged and released through a pressure release opening, and when a pressure release mechanism is not used, the tension is eliminated by holding the crank rotating threaded rod to push the second pushing disc to squeeze the buffer spring, and the buffer spring is made to push the first pushing disc to push the sealing ball to drive the sealing ball to seal the inner cavity of the fixed cylinder by matching with the sealing ring;

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

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

1. according to the invention, the filter screen cylinder is slid into the inner cavity of the valve body, so that the filter screen cylinder is in plug connection with the sealing groove, then the connection port is in plug connection with the external pipeline, the transmission worm wheel is driven to drive the cylinder through the rotation transmission worm, then the cylinder rotates the first rotating block and the second rotating block to pull 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 groove through the T-shaped sliding groove, and then the square block pulls the supporting rod to drive the clamping block and the limiting column through the rotating shaft, so that the supporting rod is matched with the U-shaped limiting frame to drive the clamping block to clamp and pull the external pipeline, and the joint of the limiting column and the external pipeline is in plug connection limiting, so that the valve body and the external pipeline are convenient to install, and the filter screen cylinder and the sealing groove are in plug connection sealing through the external pipeline extrusion, so that the trouble that the conventional bidirectional sealing butterfly valve is inconvenient to install and disassemble in the later maintenance and overhaul is avoided.

2. According to the invention, the first gear is driven by holding the handle to rotate the second 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 driving column and the rotating sleeve, so that the driving column and the rotating sleeve drive the first valve block and the second valve block to be close to each other by using the connecting block, the second valve block is spliced and sealed by using the inserting block and the inserting slot of the first valve block, and after the second valve block is spliced and combined by using the inserting block and the inserting slot of the first valve block, the inner cavity of the valve body is sealed by extruding the rubber sealing block, thereby avoiding the situation that the existing butterfly valve is influenced by the structure and can only bear pressure positively, the sealing performance is obviously poor, and the butterfly plate cannot be folded frequently to reduce bearing pressure so that the leakage of the valve seat occurs.

3. According to the invention, the crank is held to rotate the threaded rod to push the second pushing disc to squeeze the buffer spring to calibrate and adjust the tension of the buffer spring, so that when the pressure in the inner cavity of the valve body is overlarge, the sealing ball is pushed to push the pushing column to jack 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, then the pressure is discharged and released through the pressure release opening, when the pressure release mechanism is not used, the crank is held to rotate the threaded rod to push the second pushing disc to squeeze the buffer spring to eliminate the tension, and the buffer spring is made to push the first pushing disc to push the pushing column to drive the sealing ball, so that the sealing ball is matched with the sealing ring to seal the inner cavity of the fixed cylinder, and the problem that the existing bidirectional sealing butterfly valve cannot adjust automatic pressure release according to different pressures is avoided.

Drawings

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

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

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

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

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

FIG. 6 is a schematic view of a semi-sectional structure of a valve body according to the present invention;

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

FIG. 8 is a schematic view of a semi-sectional structure of a stationary barrel of the present invention;

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

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

reference numerals in the drawings represent respectively:

1. a valve body; 2. a pressure release mechanism; 201. a fixed cylinder; 202. a sealing ball; 203. pushing the column; 204. a sealing plate; 205. a seal ring; 206. a first pushing plate; 207. a buffer spring; 208. a second pushing plate; 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 rod; 9. a groove; 10. clamping blocks; 11. a limit column; 12. a spool; 13. a spring; 14. a first fixed block; 15. a drive worm; 16. a cylinder; 17. a drive worm wheel; 18. a second rotating block; 19. a filter screen cylinder; 20. sealing grooves; 21. a rubber sealing block; 22. a rotating sleeve; 23. a connecting block; 24. a first valve plate; 25. a drive column; 26. a second valve plate; 27. a first worm wheel; 28. a second worm wheel; 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 blocks; 38. square blocks; 39. a T-shaped strut; 40. and a connecting port.

Detailed Description

In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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 otherwise than as described herein, and therefore the present invention is not limited to the specific embodiments of the disclosure that follow.

A bi-directional seal butterfly valve of the present embodiment, referring to fig. 1-10: including valve body 1, the portion all is provided with relief mechanism 2 about valve body 1 up end, the inside rotation of terminal surface is connected with rotation cover 22 through the bearing before the valve body 1, rotation cover 22 is inside to be connected with drive post 25 through the bearing rotation, drive post 25 and the outside equal fixedly connected with connecting block 23 of rotation cover 22, drive post 25 and rotation cover 22 one end are kept away from to connecting block 23 are fixedly connected with second valve block 26 and first valve block 24 respectively, drive post 25 and rotation cover 22 outside are fixedly connected with first worm wheel 27 and second worm wheel 28 respectively, valve body 1 inside is provided with rubber seal piece 21, the terminal surface all is provided with connector 40 about valve body 1, terminal surface all is provided with T type spout 7 about the valve body 1, T type spout 7 inner chamber sliding connection has T type slide post 39, the equal fixedly connected with second fixed block 30 of terminal surface before the valve body 1, the inside rotation of second fixed block 30 is connected with first worm 31 and second worm 32 respectively through the bearing, first worm 31 and second worm 32 up end are fixedly connected with first gear 33 and second gear 34 respectively.

The pressure release 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 disc 206, a buffer spring 207, a second pushing disc 208, a threaded rod 209, a crank 210 and a pressure release opening 211, wherein the left and right parts of the upper end face of the valve body 1 are fixedly communicated with the fixed cylinder 201, the sealing ring 205 is fixedly connected to the lower edge of the inner cavity of the fixed cylinder 201, the sealing ring 205 is made of rubber materials, and the pressure release opening 211 is arranged outside the fixed cylinder 201. Through sliding filter screen section of thick bamboo 19 into valve body 1 inner chamber, make filter screen section of thick bamboo 19 and seal groove 20 carry out the grafting and connect, then utilize connector 40 to carry out the grafting with external pipeline to connect the back, drive worm wheel 17 through rotation drive worm 15 drives cylinder 16, then make cylinder 16 rotate first rotating block 3 and second rotating block 18 pull first pull rod 4 and second pull rod 5 drive square piece 38, make square piece 38 utilize T type slide column 39 spout to connect in T type spout 7 inner chamber, make square piece 38 utilize pivot pulling bracing piece 8 to drive clamp splice 10 and spacing post 11, thereby make bracing piece 8 cooperate U type spacing 6 to drive clamp splice 10 to be close to each other and carry out the centre gripping pulling to external pipeline, and make spacing post 11 and external pipeline's joint department carry out grafting spacing, thereby be convenient for valve body 1 and external pipeline installation, and the rethread utilizes external pipeline extrusion filter screen section of thick bamboo 19 and seal groove 20 to carry out the grafting and seal, current two-way seal butterfly valve is comparatively loaded down with the comparatively loaded down with trivial details through utilizing screw external pipeline to install, lead to inconvenient to carry out quick dismantlement installation to two-way seal when maintaining the later stage.

Wherein, fixed cylinder 201 up end threaded connection has threaded rod 209, and threaded rod 209 up end fixedly connected with crank 210, and the terminal surface is connected with second pushing disc 208 through the bearing rotation under the threaded rod 209, and terminal surface fixedly connected with buffer spring 207 under the second pushing disc 208, buffer spring 207 keep away from second pushing disc 208 one end fixedly connected with first pushing disc 206.

Wherein, fixed cylinder 201 inner chamber lower part fixedly connected with sealing disk 204, sealing disk 204 inside sliding connection has pushing post 203, and terminal surface fixedly connected with pushing post 203 under the first pushing disk 206 pushes down terminal surface fixedly connected with sealing ball 202 under the post 203, and sealing ball 202 outside is provided with the rubber layer.

The end of the first valve plate 24, which is close to the second valve plate 26, is provided with a slot 36, the end of the second valve plate 26, which is close to the first valve plate 24, is fixedly connected with an insert 37, the upper end surface of the second gear 34 is fixedly connected with a handle 35, the first gear 33 is engaged with the second gear 34, and the first worm 31 and the second worm 32 are engaged with the first worm wheel 27 and the second worm wheel 28 respectively. 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 are simultaneously rotated to drive 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 driving column 25 and the rotating sleeve 22, so that the driving column 25 and the rotating sleeve 22 drive the first valve plate 24 and the second valve plate 26 to be close to each other by using the connecting block 23, the second valve plate 26 is plugged and sealed by using the plug 37 and the slot 36 of the first valve plate 24, and after the second valve plate 26 is plugged and combined by using the plug 37 and the slot 36 of the first valve plate, the inner cavity of the valve body 1 is sealed by extruding the rubber sealing block 21, the situation that the existing butterfly valve is only subjected to forward pressure bearing sealing under the influence of the structure, the sealing performance is obviously poor, and the butterfly plate cannot be folded to reduce the pressure bearing, so that the leakage of the valve seat is caused is often avoided.

The inside through-hole 29 that is provided with of transmission post 25 up end, through-hole 29 inside is connected with cylinder 16 through the bearing rotation, and cylinder 16 outside fixedly connected with transmission worm wheel 17, and the terminal surface fixedly connected with first fixed block 14 behind the valve body 1, 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 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 the second rotating block 18, of the first pull rod 4 and the second pull rod 5 are connected with a square block 38 in a rotating mode through 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 rotationally connected with a supporting rod 8 through a rotating shaft, one end, far away from the square block 38, of the supporting rod 8 is fixedly connected with a clamping block 10, the inner portion of the clamping block 10 is uniformly and fixedly connected with a limiting column 11, the mutually approaching faces of the supporting rod 8 are provided with grooves 9, the inner cavities of the grooves 9 are slidably connected with sliding columns 12, the outer portions of the sliding columns 12 are fixedly connected with springs 13, and one end, far away from the sliding columns 12, of each spring 13 is fixedly connected with a valve body 1. The crank 210 is held to rotate the threaded rod 209 to push the second pushing disc 208 to squeeze 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 overlarge, the sealing ball 202 is pressed to push the pushing column 203 to jack up the first pushing disc 206 to open the fixed cylinder 201, pressure is enabled to enter the inner cavity of the fixed cylinder 201 through the sealing ring 205, then the pressure is discharged and relieved through the pressure relief opening 211, when the pressure relief mechanism 2 is not used, the crank 210 is held to rotate the threaded rod 209 to push the second pushing disc 208 to squeeze the buffer spring 207 to eliminate the tension, and the buffer spring 207 is enabled to press the first pushing disc 206 to push the pushing 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 existing bidirectional sealing butterfly valve cannot adjust automatic pressure relief according to different pressures is avoided.

The bottom of the inner cavity of the connecting port 40 is provided with a sealing groove 20, the inner cavity of the sealing groove 20 is connected with a filter screen barrel 19 in a plug-in manner, and the left edge and the right edge of the front end face and the rear end face of the valve body 1 are fixedly connected with U-shaped limiting frames 6.

s1, sliding a filter screen cylinder 19 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 enabling a connecting port 40 to be in plug connection with an external pipeline, driving a transmission worm wheel 17 to drive a cylinder 16 through a rotation transmission worm 15, 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 the inner cavity of a T-shaped sliding groove 7 through a T-shaped sliding groove 39 through a sliding groove, enabling the square block 38 to drive a clamping block 10 and a limiting column 11 through a rotating shaft to pull a supporting rod 8, enabling the supporting rod 8 to be matched with the 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 joint of the limiting column 11 and the external pipeline to be in plug connection limiting, and then enabling the valve body 1 and the external pipeline to be installed;

s2, the second gear 34 is held to rotate to drive the first gear 33, then the second gear 34 and the first gear 33 are simultaneously rotated to drive the first worm gear 31 and the second worm gear 32 to drive the first worm gear 27 and the second worm gear 28 to drive the driving column 25 and the rotating sleeve 22, so that the driving column 25 and the rotating sleeve 22 drive the first valve plate 24 and the second valve plate 26 to be close to each other by using the connecting block 23, the second valve plate 26 is in plug-in sealing by using the plug 37 and the slot 36 of the first valve plate 24, and the second valve plate 26 is in plug-in combination by using the plug 37 and the slot 36 of the first valve plate, and after the completion, the inner cavity of the valve body 1 is sealed by extruding the rubber sealing block 21;

s3, when the pressure in the inner cavity of the valve body 1 is overlarge, the sealing ball 202 is extruded to push the pushing column 203 to jack the first pushing 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, then the pressure is discharged and released through the pressure release opening 211, and when the pressure release mechanism 2 is not used, the crank 210 is held, the threaded rod 209 is rotated to push the second pushing disc 208 to extrude the buffering spring 207 to remove the tension, and the buffering spring 207 is made to press the first pushing disc 206 to push the pushing 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 gear 27 and the second worm gear 28 are driven by the first worm 31 and the second worm 32 to drive the driving column 25 and the rotating sleeve 22, so that the driving column 25 and the rotating sleeve 22 drive the first valve plate 24 and the second valve plate 26 to be far away from each other by using the connecting block 23 to discharge gas, fluid and the like.

When in use, the filter screen cylinder 19 is slid into the inner cavity of the valve body 1, the filter screen cylinder 19 is in plug connection with the seal groove 20, then the connection port 40 is in plug connection with an external pipeline, the transmission worm wheel 17 is driven by the rotation transmission worm 15 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, the square block 38 is connected into the inner cavity of the T-shaped sliding groove 7 by utilizing the T-shaped sliding column 39 through the sliding groove, the square block 38 is pulled by utilizing the rotating shaft to pull the supporting rod 8 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 be mutually close to clamp and pull the external pipeline, the joint of the limiting column 11 and the external pipeline is in plug connection limiting, thus the valve body 1 and the external pipeline are convenient to install, the filter screen cylinder 19 and the sealing groove 20 are extruded by an external pipeline to be spliced and sealed, the second gear 34 is held by the handle 35 to drive the first gear 33, then the second gear 34 and the first gear 33 are simultaneously rotated by 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 driving post 25 and the rotating sleeve 22, so that the driving post 25 and the rotating sleeve 22 drive the first valve plate 24 and the second valve plate 26 to be mutually close by the connecting block 23, the second valve plate 26 is spliced and sealed by the inserting block 37 and the inserting groove 36 of the first valve plate 24, and the second valve plate 26 is spliced and sealed by the inserting block 37 and the inserting groove 36 of the first valve plate to seal the inner cavity of the valve body 1 by extruding the rubber sealing block 21 after the splicing and combining is completed, thereby avoiding that the prior butterfly valve is influenced by the structure of the self-body structure and can only be forward pressed and sealed, and the sealing performance is obviously poor, and the butterfly plate is often insufficient in rigidity and cannot be folded to reduce bearing pressure, so that the condition of valve seat leakage occurs.

The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A two-way seal butterfly valve, characterized in that: comprises a valve body (1), the left and right parts of the upper end surface of the valve body (1) are respectively provided with a pressure release mechanism (2), a rotating sleeve (22) is rotationally connected inside the front end surface of the valve body (1) through a bearing, a transmission column (25) is rotationally connected inside the rotating sleeve (22) through the bearing, connecting blocks (23) are fixedly connected outside the transmission column (25) and the rotating sleeve (22), the connecting blocks (23) are far away from the transmission column (25) and one end of the rotating sleeve (22) and are respectively fixedly connected with a second valve plate (26) and a first valve plate (24), a first worm wheel (27) and a second worm wheel (28) are respectively fixedly connected outside the transmission column (25) and the rotating sleeve (22), a rubber sealing block (21) is arranged inside the valve body (1), connecting ports (40) are respectively arranged on the left and right end surfaces of the valve body (1), T-shaped sliding grooves (7) are respectively arranged on the left and right edge of the front end surface and the rear end surface of the valve body (1), T-shaped sliding grooves (7) are respectively connected with T-shaped sliding columns (39), the front end surface (1) is respectively fixedly connected with a second worm (30) and a second worm (30) through a second worm (30), the upper end surfaces of the first worm (31) and the second worm (32) are fixedly connected with a first gear (33) and a second gear (34) respectively.

2. The bidirectional sealing butterfly valve according to claim 1, wherein the pressure release 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 disc (206), a buffer spring (207), a second pushing disc (208), a threaded rod (209), a crank (210) and a pressure release 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 sealing ring (205) is fixedly connected to the lower edge of the inner cavity of the fixed cylinder (201), the sealing ring (205) is made of rubber materials, and the pressure release opening (211) is arranged outside the fixed cylinder (201).

3. The bidirectional sealing butterfly valve according to claim 2, wherein the upper end surface of the fixed cylinder (201) is in threaded connection with a threaded rod (209), the upper end surface of the threaded rod (209) is fixedly connected with a crank (210), the lower end surface of the threaded rod (209) is rotationally connected with a second pushing disc (208) through a bearing, the lower end surface of the second pushing disc (208) is fixedly connected with a buffer spring (207), and one end of the buffer spring (207) away from the second pushing disc (208) is fixedly connected with a first pushing disc (206).

4. The bidirectional 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), the 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 on the outside of the sealing ball (202).

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

6. The bidirectional sealing butterfly valve according to claim 1, wherein a through hole (29) is formed in the upper end face of the transmission column (25), a cylinder (16) is connected in the through hole (29) through bearing rotation, a transmission worm wheel (17) is fixedly connected to the outside of the cylinder (16), a first fixed block (14) is fixedly connected to the rear end face of the valve body (1), a transmission worm (15) is connected in the first fixed block (14) through bearing rotation, and the transmission worm (15) is connected with the transmission worm wheel (17) in a meshing manner.

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

8. The bidirectional sealing butterfly valve according to claim 7, wherein the lower end surface of the square block (38) is fixedly connected with a T-shaped sliding column (39), the upper end surface and the lower end surface of the square block (38) are rotationally connected with a supporting rod (8) through a rotating shaft, one end of the supporting rod (8) away from the square block (38) is fixedly connected with a clamping block (10), limiting columns (11) are uniformly and fixedly connected inside the clamping block (10), grooves (9) are formed in mutually approaching surfaces of the supporting rod (8), sliding columns (12) are slidingly connected with inner cavities of the grooves (9), springs (13) are fixedly connected to the outer parts of the sliding columns (12), and one end of each spring (13) is away from the sliding column (12) and is fixedly connected with a valve body (1).

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