CN213541332U

CN213541332U - More stable butterfly valve

Info

Publication number: CN213541332U
Application number: CN202022392109.8U
Authority: CN
Inventors: 展洲; 李会超
Original assignee: Shijiazhuang Ruiheng Metallurgical Valve Equipment Manufacturing Co ltd
Current assignee: Shijiazhuang Ruiheng Metallurgical Valve Equipment Manufacturing Co ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-06-25
Anticipated expiration: 2030-10-24

Abstract

The utility model relates to a more stable butterfly valve, it includes valve body, butterfly plate and valve rod all are located inside the valve body, butterfly plate circumference lateral wall and valve body inner wall butt, the valve rod runs through the butterfly plate along butterfly plate diameter direction, the inside turbine that is provided with of valve body, the one end and the turbine fixed connection that the butterfly plate was exposed to the valve rod, the other end and the valve body inner wall rotation that the butterfly plate was exposed to the valve rod are connected, the cooperation is provided with the worm on the turbine, the one end that the worm is close to the turbine is located inside the valve body, the other end of turbine passes the outside that the valve body stretches out to the valve body, the outside cover that the worm stretches out valve body one end is equipped with the sleeve pipe, leave the clearance between sleeve pipe and the worm, the sleeve pipe is close to the one end and the valve body fixed. This application has more stable effect under the long-time impact of rivers after the butterfly plate rotates certain angle.

Description

More stable butterfly valve

Technical Field

The utility model belongs to the technical field of the technique of valve and specifically relates to a more stable butterfly valve is related to.

Background

The butterfly valve is a valve which uses a disc type opening and closing piece to rotate back and forth for about 90 degrees to open, close or adjust the medium flow, has the advantages of simple structure, small volume, light weight, small driving moment and simple and rapid operation, and also has good flow adjusting function and closing sealing characteristic, is one of the fastest valve varieties developed in the last decade, and is generally applied to large pipelines to adjust the medium flow.

In the correlation technique, when the staff is to opening and close the butterfly valve, because rivers flow fast and strike the butterfly plate, the butterfly plate receives the impact of high-pressure rivers and causes the butterfly plate to rotate easily and make the butterfly plate angle be difficult for fixing.

In view of the above-mentioned related art, the inventor thinks that there is the butterfly plate that easily causes the butterfly plate to rotate under the impact of high-pressure rivers for a long time, and the butterfly plate angle is difficult for fixed defect.

SUMMERY OF THE UTILITY MODEL

In order to improve the butterfly plate and easily cause the butterfly plate to rotate under the impact of high-pressure rivers, the difficult fixed defect of butterfly plate angle, this application provides a more stable butterfly valve.

The application provides a more stable butterfly valve adopts following technical scheme:

the utility model provides a more stable butterfly valve, its includes valve body, butterfly plate and valve rod all are located inside the valve body, butterfly plate circumference lateral wall and valve body inner wall butt, and the valve rod runs through the butterfly plate along butterfly plate diameter direction, and the inside turbine that is provided with of valve body, the valve rod expose the one end and the turbine fixed connection of butterfly plate, and the other end that the valve rod exposes the butterfly plate rotates with the valve body inner wall to be connected, and the cooperation is provided with the worm on the turbine, and the one end that the worm is close to the turbine is located inside the valve body, and the other end of turbine passes the valve body and stretches out to the outside of valve body, and the outside cover that the worm stretches out valve body one end is equipped with the sleeve pipe, leaves the clearance between sleeve pipe and the worm, the sleeve pipe is close to the one end.

Through adopting above-mentioned technical scheme, when opening the butterfly valve, rotate the hand wheel, make the butterfly plate rotate through the cooperation of turbine and worm, open the butterfly valve then and make rivers pass through, the butterfly plate rotates certain angle after, the turned angle of butterfly plate can further be fixed to brake assembly, makes the butterfly plate be difficult for taking place to rotate under the impact of rivers.

Optionally, the braking subassembly includes non return pole, gag lever post, spacing spring and roof, the through-hole has been seted up on the sleeve pipe, the gag lever post passes through-hole and gag lever post outer wall and through-hole inner wall fixed connection, the inside cavity of gag lever post, the storage tank has been seted up to circumference on the inner wall of gag lever post, the non return pole runs through the gag lever post along the gag lever post axis direction, the non return pole rotates with the gag lever post to be connected, the spacing spring housing is established on the non return pole, the roof fixed cover is established on the non return pole, the roof is located the one end that spacing spring is close to the ratchet, spacing spring one end is just to the inner wall butt of roof with the storage tank, the spacing spring other end is with the outer wall butt of roof, the one end slope that the non return pole.

By adopting the technical scheme, the ratchet wheel is fixed with the worm, when the hand wheel rotates, the ratchet wheel pushes the check rod to reciprocate along the vertical direction, when the hand wheel stops rotating, the check rod blocks the rotation of the ratchet wheel so as to fix the rotation angle of the butterfly plate, when the butterfly plate is closed, the check rod is pulled, the check rod is rotated to enable the inclined plane of the check rod to rotate, and the ratchet wheel is rotated in the opposite direction so as to enable the butterfly plate to be closed with the valve body.

Optionally, the sliding block is fixedly connected to the circumferential side wall of the check rod, the annular groove is formed in the inner wall of the limiting rod, the annular groove is annular, the sliding groove is formed in the inner wall of the annular groove, the sliding groove is arranged in the direction close to the ratchet wheel in the length direction, the sliding block is in sliding fit with the annular groove and the sliding groove, and when the sliding block is located at one end, far away from the annular groove, of the sliding groove, the limiting spring.

Through adopting above-mentioned technical scheme, when pulling the check rod, the slider slides along the spout earlier, and the slider slides to annular department, rotates the check rod, and the slider lies in relative spout top just behind the check rod rotation degree, loosens the check rod slider and slides along the spout, and the check rod is close to the one end and the ratchet butt of ratchet, and when the check rod moved along vertical direction, the slider can hinder the check rod rotation and influence the ratchet pivoted condition.

Optionally, a plurality of grooves of accomodating have been seted up on the butterfly plate circumference lateral wall, and adjacent groove of accomodating uses the butterfly plate centre of a circle to be the circumference and distributes as the central point, accomodates groove length direction and sets up along the diametric (al) of butterfly plate, and accomodates the inner wall setting of groove opening towards the valve body, accomodate the inslot and be provided with the butterfly plate pivoted damping subassembly when providing resistance reduction butterfly valve and close.

Through adopting above-mentioned technical scheme, when the butterfly valve was closed, damping component can be airtight for butterfly plate and valve body provide certain damping effect, when butterfly plate and valve body were closed, had certain frictional force between damping component and the valve body inner wall, can reduce the easy pivoted condition of butterfly plate when rivers impact force is great.

Optionally, the damping subassembly includes damping spring and steel ball, damping spring is located and accomodates the inslot, damping spring's one end and the inslot wall fixed connection of accomodating, damping spring's the other end and the surface butt of steel ball, the steel ball diameter is greater than damping spring, the steel ball is located damping spring and is close to valve body one end, the steel ball can rotate at damping spring one end, it is provided with the fender ring to accomodate the groove on being close to the inner wall of valve body one end fixedly, the steel ball diameter is greater than keeps off the ring diameter, and the steel ball deviates from damping spring's surface and the inner wall roll connection of valve body, the valve body inner wall corresponds steel ball department and sets up a.

Through adopting above-mentioned technical scheme, steel ball and damping spring all are located and accomodate the inslot, and when butterfly plate and valve body closed, steel ball surface and kerve inner wall butt, when the butterfly plate rotated, the steel ball was pressed by the valve body inner wall and is moved, and damping spring is compressed, keeps off the ring restriction steel ball and does not deviate from the butterfly plate, and steel ball and damping spring can hinder the butterfly plate rotation for providing the damping between butterfly plate and the valve body.

Optionally, a plurality of grooves are formed in the circumferential side wall of the butterfly plate, the grooves are located on two sides of the damping assembly, sealing rings are fixedly arranged at positions, corresponding to the grooves, of the inner wall of the valve body, and the outer walls of the sealing rings are abutted to the inner walls of the grooves.

By adopting the technical scheme, when the outer wall of the butterfly plate is closed with the inner wall of the valve body, the sealing ring is matched with the groove to improve the sealing property between the butterfly plate and the valve body.

Optionally, a plurality of limiting blocks are fixedly arranged on the inner wall of the valve body, and adjacent limiting blocks are symmetrical along the central axis of the butterfly plate.

Through adopting above-mentioned technical scheme, the stopper can be at the butterfly valve and open or close the in-process, and restriction butterfly plate excessively rotates, makes butterfly plate and valve body keep encapsulated situation.

Optionally, a plurality of reinforcing rods and a plurality of supporting rods for reinforcing the strength of the butterfly plate are fixedly arranged on the side walls of the two sides of the butterfly plate.

Through adopting above-mentioned technical scheme, stiffener and branch reduce the deformation that water impact caused the butterfly plate for butterfly plate increase strength to extension butterfly plate life.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the direction of the inclined plane of the check rod can be matched with the ratchet wheel to rotate forwards or reversely, and the check rod can block the ratchet wheel from rotating, so that the butterfly plate is not easy to rotate after the angle of the butterfly plate is fixed;

2. the arrangement of the damping component increases the friction force between the butterfly plate and the valve body, and provides a certain damping effect for the closing state of the butterfly plate and the valve body, so that the butterfly plate is not easy to rotate under the impact of water flow, and the sealing property of the butterfly valve is enhanced;

3. due to the arrangement of the sliding block, the sliding block enables the check rod to be not easy to rotate when moving along the vertical direction, and therefore the rotation angle of the butterfly plate can be adjusted better in cooperation with the ratchet wheel.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a partial sectional view of the damper assembly in an embodiment of the present application;

FIG. 3 is a partial sectional view of the embodiment of the present application to show the ratchet;

FIG. 4 is an exploded view of a portion of the brake assembly in an embodiment of the present application;

FIG. 5 is an enlarged view of portion A of FIG. 2;

fig. 6 is a partial structural sectional view showing a seal ring in the embodiment of the present application.

Description of reference numerals: 1. a valve body; 11. a bottom groove; 12. a seal ring; 13. a limiting block; 2. a butterfly plate; 21. a receiving groove; 22. a groove; 23. a reinforcing bar; 24. a strut; 3. a valve stem; 31. a turbine; 32. a worm; 321. a sleeve; 3211. a through hole; 322. a ratchet wheel; 33. a hand wheel; 4. a brake assembly; 41. a check rod; 411. a slider; 42. a limiting rod; 421. a ring groove; 422. a chute; 423. a containing groove; 43. a limiting spring; 44. a top plate; 5. a damping assembly; 51. a damping spring; 52. a steel ball; 6. fixing the rod; 7. and (4) a baffle ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a more stable butterfly valve.

Referring to fig. 1 and 2, a more stable butterfly valve comprises a valve body 1, a butterfly plate 2 and a valve rod 3, wherein the valve body 1, the valve rod 3 and the butterfly plate 2 are vertically arranged, the butterfly plate 2 is positioned in the valve body 1, the circumferential outer wall of the butterfly plate 2 is abutted against the inner wall of the valve body 1, the valve rod 3 penetrates through the butterfly plate 2 and the axis of the valve body 1, the valve rod 3 is fixedly connected with the butterfly plate 2, the valve rod 3 is rotatably connected with the valve body 1, the butterfly plate 2 circumferentially rotates by taking the length direction of the valve rod 3 as a rotating axis, the top end of the valve rod 3 is fixedly connected with a turbine 31, the turbine 31 is positioned in the valve body 1, the turbine 31 is horizontally arranged, one side of the turbine 31 is cooperatively connected with a worm 32, the worm 32 is horizontally arranged, one end of the worm 32 is rotatably connected with the valve body 1, the other end of the worm 32 extends out of the valve body 1, one end, the fixing rod 6 is horizontally arranged, the fixing rod 6 is circumferentially distributed by taking the axis of the worm 32 as a center line and is arranged at intervals, the fixing rod 6 enables the sleeve 321 to be fixed relative to the worm 32, the fixing rod 6 can save materials, a gap is reserved between the sleeve 321 and the worm 32, the sleeve 321 is provided with the braking assembly 4, and the braking assembly 4 is used for further fixing the rotation angle of the butterfly plate 2 and reducing the rotation condition of the butterfly plate 2 under the impact of water flow.

Referring to fig. 2 and 3, a ratchet 322 is fixedly sleeved on the worm 32, the ratchet 322 is located inside the sleeve 321, a gap is left between the addendum circle of the ratchet 322 and the inner wall of the sleeve 321, a through hole 3211 is formed in the side wall of the sleeve 321, and the brake assembly 4 is arranged in the through hole 3211 in a penetrating manner;

referring to fig. 3 and 4, the brake assembly 4 includes a check rod 41, a limit rod 42, a limit spring 43 and a top plate 44, the limit rod 42 is vertically disposed, the limit rod 42 is disposed in the through hole 3211, an outer wall of the limit rod 42 is fixedly connected with an inner wall of the through hole 3211, the limit rod 42 is hollow inside, the check rod 41 is vertically disposed, the check rod 41 is disposed in the limit rod 42, the check rod 41 is rotatably connected with the limit rod 42, the check rod 41 can also slide along the vertical direction, an accommodating groove 423 is disposed on an inner wall of the limit rod 42, the accommodating groove 423 is disposed along a circumference of the inner wall of the limit rod 42, the limit spring 43 is fixedly sleeved on the check rod 41, the limit spring 43 is located in the accommodating groove 423, the top plate 44 is horizontally disposed, the top plate 44 is fixedly sleeved on the check rod 41, the top plate 44 is located below the limit spring 43, one end of the limit spring 43 is abutted to an, the lower surface of the top plate 44 is abutted against the inner wall of the limiting rod 42, the bottom end of the check rod 41 extends out of the limiting rod 42, the bottom end of the check rod 41 is abutted against the outer wall of the tooth root circle of the ratchet wheel 322, at the moment, the limiting spring 43 is in an original long state, one end of the check rod 41 close to the ratchet wheel 322 is arranged in an inclined shape, the inclined surface of the check rod 41 is over against the rotation direction of the ratchet wheel 322, and the inclined surface direction of the check rod 41 is arranged in an inclined upward direction along the direction far; when the butterfly valve is opened, the hand wheel 33 is rotated, the hand wheel 33 drives the worm 32 to rotate, the worm 32 is in meshing transmission with the worm wheel 31, the worm wheel 31 drives the valve rod 3 to rotate, namely the butterfly plate 2 rotates along with the worm wheel, the ratchet wheel 322 pushes the check rod 41 to reciprocate along the vertical direction when rotating, the check rod 41 is always abutted against the ratchet wheel 322 under the elastic force action of the limiting spring 43, when the butterfly plate 2 rotates to a certain angle, the hand wheel 33 stops rotating, and the check rod 41 blocks the ratchet wheel 322 to rotate, so that the rotation angle of the butterfly plate 2 is fixed; when the butterfly valve is closed, the check rod 41 is pulled to enable the check rod 41 to move towards the direction away from the ratchet wheel 322, the check rod 41 is rotated to enable the inclined surface of the check rod 41 to rotate 180 degrees, the check rod 41 is loosened, and at the moment, the hand wheel 33 is rotated in the opposite direction until the butterfly valve is in a sealing state to complete the closing of the butterfly valve.

Referring to fig. 3 and 4, two sliding blocks 411 are fixedly disposed on the circumferential side wall of the check rod 41, two adjacent sliding blocks 411 are symmetrically disposed with the axis of the check rod 41 as a symmetry axis, a ring groove 421 is disposed on the inner wall of the sliding block 411 corresponding to the limiting rod 42, the length direction of the ring groove 421 is disposed along the circumferential direction and horizontally on the inner wall of the limiting rod 42, two sliding grooves 422 are vertically disposed on the horizontal side wall of the ring groove 421 close to the sleeve 321, two adjacent sliding grooves 422 are symmetrically disposed with the axis of the limiting rod 42 as a symmetry axis, the length direction of the sliding grooves 422 is disposed along the direction close to the sleeve 321, the sliding grooves 422 are disposed above the accommodating groove 423 and are not communicated with each other, the size of the sliding blocks 411 is matched with the ring groove 421 and the sliding grooves 422, the sliding grooves 421 and the sliding grooves 422 form a sliding track for the sliding blocks 411, when the sliding blocks 411 are disposed at one end, the highest point of the motion of the sliding block 411 is positioned below the ring groove 421; upwards pulling check rod 41 makes spacing spring 43 compressed, slider 411 moves to annular groove 421 along spout 422 this moment, rotate check rod 41 180 degrees, two sliders 411 also rotate 180 degrees along annular groove 421, two sliders 411 are located spout 422 directly over just this moment, loosen check rod 41, slider 411 moves to spout 422 bottom along spout 422 downward, check rod 41 bottom and ratchet 322 butt this moment, slider 411 and annular groove 421 and spout 422 sliding fit, make check rod 41 cooperation ratchet 322 adjust the turned angle back of butterfly plate 2, check rod 41 is difficult to rotate at the motion in-process along vertical direction, thereby make the effectual cooperation ratchet 322 of check rod 41 rotate thereby reach the effect of adjusting butterfly plate 2 turned angle back fixed.

Referring to fig. 2 and 5, a plurality of accommodating grooves 21 are formed in the circumferential side wall of the butterfly plate 2, the length direction of the accommodating grooves 21 is arranged along the diameter direction of the butterfly plate 2, the opening direction of the accommodating grooves 21 is arranged towards the inner wall of the valve body 1, the accommodating grooves 21 are circumferentially distributed with the circle center of the butterfly plate 2 as the central point, and the adjacent accommodating grooves 21 are equidistantly distributed, in the embodiment of the present application, six accommodating grooves 21 are formed, a damping assembly 5 is arranged in the accommodating groove 21, the damping assembly 5 comprises a damping spring 51 and a steel ball 52, the damping spring 51 is positioned in the accommodating groove 21, the steel ball 52 is positioned between the damping spring 51 and the valve body 1, one end of the damping spring 51 is fixedly connected with the inner wall of the accommodating groove 21, the other end of the damping spring 51 is connected with the steel ball 52 in a rolling manner, the diameter of the steel ball 52 is larger than that of the damping spring 51, a retaining ring 7 is fixedly arranged on the inner wall of the, the outer surface of the steel ball 52 can extend out of the accommodating groove 21, the damping spring 51 is in an original long state at the moment, when the butterfly valve is in a sealing state, a plurality of bottom grooves 11 are formed in the inner wall of the valve body 1 at positions corresponding to the steel ball 52, and the shapes of the bottom grooves 11 are matched with the outer surface of the steel ball 52; when the butterfly plate 2 rotates, the steel ball 52 slides out of the bottom groove 11, the damping spring 51 is compressed at the moment, when the steel ball 52 is separated from the inner wall of the valve body 1, the damping spring 51 is in an original long state, the steel ball 52 can reduce the situation that the butterfly plate 2 is impacted by water flow and is opened at a certain angle when the butterfly valve is in a sealing state, and the matching of the steel ball 52 and the damping spring 51 provides a certain damping effect for the butterfly plate 2, so that the butterfly valve is in the sealing state as much as possible.

Referring to fig. 6, a plurality of grooves 22 are formed in the circumferential side wall of the butterfly plate 2, two grooves 22 are formed, each groove 22 is annular, each groove 22 is formed along the circumferential outer wall of the butterfly plate 2, adjacent grooves 22 are respectively located on two sides of the damping assembly 5, a sealing ring 12 is fixedly arranged on the inner wall of the valve body 1 corresponding to the grooves 22, the sealing ring 12 can be made of rubber, and the outer wall of the sealing ring 12 is abutted to the inner wall of each groove 22 when the butterfly valve is in a sealed state; the sealing ring 12 can increase the contact tightness between the outer wall of the butterfly plate 2 and the inner wall of the valve body 1 when the butterfly valve is in a closed state.

Referring to fig. 1, the inner wall of the valve body 1 is fixedly provided with two limiting blocks 13, two limiting blocks 13 are arranged, adjacent limiting blocks 13 are symmetrical about the axis center of the butterfly plate 2 in the vertical direction, the butterfly plate 2 and the valve body 1 are in a closed state, the vertical side wall of the limiting blocks 13 is abutted against the vertical side wall of the butterfly plate 2, the side walls of the two sides of the butterfly plate 2 are fixedly provided with a plurality of reinforcing rods 23 and a plurality of supporting rods 24, the number of the reinforcing rods 23 is two, the number of the supporting rods 24 is four, the length direction of the reinforcing rods 23 is arranged along the diameter direction of the butterfly plate 2, the two reinforcing rods 23 are perpendicular to each other, the centers of the two reinforcing rods 23 in the length direction are overlapped with each other, the center of the two reinforcing rods 23 is overlapped with the center of the butterfly plate 2, the supporting rods 24 are positioned between the adjacent reinforcing rods 23, the end portions of the, and the intersection point of the vertical projections of the adjacent reinforcing rods 23 is positioned at the center of the rectangle formed by the vertical projections of the four supporting rods 24; the reinforcing rod 23 and the supporting rod 24 can reinforce the strength of the butterfly plate 2, and the limiting block 13 limits the butterfly plate 2 to rotate excessively so as to improve the sealing performance of the butterfly valve.

The implementation principle of the more stable butterfly valve of the embodiment of the application is as follows: when the butterfly valve is opened, the hand wheel 33 is rotated, the butterfly plate 2 starts to rotate, the hand wheel 33 drives the worm 32 to rotate, the ratchet wheel 322 also rotates, the ratchet wheel 322 rotates to enable the check rod 41 to reciprocate along the vertical direction, after the butterfly plate 2 rotates for a certain angle, the hand wheel 33 stops rotating, the check rod 41 blocks the ratchet wheel 322 to rotate, the purpose that the angle of the butterfly plate 2 is fixed to enable the water flow to be adjusted is achieved, when the butterfly valve is closed, the check rod 41 is pulled upwards to enable the check rod 41 to rotate for 180 degrees, the check rod 41 is loosened, the hand wheel 33 is rotated in the opposite direction until the space between the butterfly plate 2 and the valve body 1 is closed, and.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a more stable butterfly valve, includes valve body (1), butterfly plate (2) and valve rod (3), its characterized in that: the butterfly plate (2) and the valve rod (3) are both located inside the valve body (1), the circumferential side wall of the butterfly plate (2) is abutted to the inner wall of the valve body (1), the valve rod (3) penetrates through the butterfly plate (2) along the diameter direction of the butterfly plate (2), a turbine (31) is arranged inside the valve body (1), one end, exposed out of the butterfly plate (2), of the valve rod (3) is fixedly connected with the turbine (31), the other end, exposed out of the butterfly plate (2), of the valve rod (3) is rotatably connected with the inner wall of the valve body (1), a worm (32) is arranged on the turbine (31) in a matched mode, one end, close to the turbine (31), of the worm (32) is located inside the valve body (1), the other end of the turbine (31) penetrates through the valve body (1) to stretch out of the valve body (1), a sleeve (321) is sleeved outside, a gap is reserved between the sleeve (321) and the worm (32), one end, close to the valve body (1), of, the worm (32) is fixedly sleeved with a ratchet wheel (322), the ratchet wheel (322) is located in a sleeve (321), and the sleeve (321) is provided with a brake component (4) for controlling the ratchet wheel (322) to block the ratchet wheel (322) from rotating.

2. A more stable butterfly valve according to claim 1, wherein: the brake component (4) comprises a check rod (41), a limiting rod (42), a limiting spring (43) and a top plate (44), a through hole (3211) is formed in the sleeve (321), the limiting rod (42) penetrates through the through hole (3211) and the outer wall of the limiting rod (42) is fixedly connected with the inner wall of the through hole (3211), the limiting rod (42) is hollow, an accommodating groove (423) is formed in the inner wall of the limiting rod (42) in the circumferential direction, the check rod (41) penetrates through the limiting rod (42) along the axial direction of the limiting rod (42), the check rod (41) is rotatably connected with the limiting rod (42), the limiting spring (43) is sleeved on the check rod (41), the top plate (44) is fixedly sleeved on the check rod (41), the top plate (44) is located at one end, close to the ratchet wheel (322), one end of the limiting spring (43) is abutted against the inner wall of the top plate (44) opposite to, the other end of the limiting spring (43) is abutted against the outer wall of the top plate (44), one end, close to the ratchet wheel (322), of the check rod (41) is obliquely arranged, the inclined surface of the check rod (41) is arranged right opposite to the rotating direction of the ratchet wheel (322), and one end, close to the ratchet wheel (322), of the check rod (41) is abutted against the ratchet wheel (322).

3. A more stable butterfly valve according to claim 2, wherein: fixed connection has slider (411) on non return pole (41) circumference lateral wall, and annular (421) have been seted up to gag lever post (42) inner wall, and annular (421) are the annular, and spout (422) have been seted up to annular (421) inner wall, and spout (422) length direction sets up along being close to ratchet (322) direction, and slider (411) and annular (421) and spout (422) equal sliding fit, and when slider (411) were located spout (422) and kept away from the one end of annular (421), spacing spring (43) were in the original length state.

4. A more stable butterfly valve according to claim 1, wherein: the butterfly plate is characterized in that a plurality of accommodating grooves (21) are formed in the circumferential side wall of the butterfly plate (2), the adjacent accommodating grooves (21) are distributed in a circumferential mode by taking the circle center of the butterfly plate (2) as a central point, the length direction of the accommodating grooves (21) is arranged along the diameter direction of the butterfly plate (2), the openings of the accommodating grooves (21) are arranged towards the inner wall of the valve body (1), and the accommodating grooves (21) are internally provided with damping components (5) which provide resistance and reduce rotation of the butterfly plate (2) when the butterfly valve is closed.

5. A more stable butterfly valve according to claim 4, characterized in that: damping subassembly (5) includes damping spring (51) and steel ball (52), damping spring (51) are located and accomodate groove (21), the one end and the inner wall fixed connection of accomodating groove (21) of damping spring (51), the other end of damping spring (51) and the surface butt of steel ball (52), steel ball (52) diameter is greater than damping spring (51), steel ball (52) are located damping spring (51) and are close to valve body (1) one end, steel ball (52) can rotate at damping spring (51) one end, accomodate and fixedly be provided with on the inner wall of groove (21) near valve body (1) one end and keep off ring (7), steel ball (52) diameter is greater than keep off ring (7) diameter, the surface of the steel ball (52) departing from the damping spring (51) is in rolling connection with the inner wall of the valve body (1), and a plurality of bottom grooves (11) matched with the surface shape of the steel ball (52) are formed in the position, corresponding to the steel ball (52), of the inner wall of the valve body (1).

6. A more stable butterfly valve according to claim 5, characterized in that: a plurality of grooves (22) are formed in the circumferential side wall of the butterfly plate (2), the grooves (22) are located on two sides of the damping assembly (5), a sealing ring (12) is fixedly arranged at the position, corresponding to the grooves (22), of the inner wall of the valve body (1), and the outer wall of the sealing ring (12) is abutted to the inner wall of the grooves (22).

7. A more stable butterfly valve according to claim 1, wherein: a plurality of limiting blocks (13) are fixedly arranged on the inner wall of the valve body (1), and adjacent limiting blocks (13) are symmetrical along the center of the vertical central axis of the butterfly plate (2).

8. A more stable butterfly valve according to claim 1, wherein: a plurality of reinforcing rods (23) and a plurality of supporting rods (24) for reinforcing the strength of the butterfly plate (2) are fixedly arranged on the side walls of the two sides of the butterfly plate (2).