CN211371310U

CN211371310U - Butterfly valve with limiting function

Info

Publication number: CN211371310U
Application number: CN201922485009.7U
Authority: CN
Inventors: 王永山
Original assignee: TIANJIN DAYU PLASTIC PRODUCTS CO Ltd
Current assignee: TIANJIN DAYU PLASTIC PRODUCTS CO Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-28
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the technical field of valves, in particular to a butterfly valve with a limiting function, which comprises a valve body, a valve shaft, a valve plate and a hand wheel disc, wherein the valve body is hollow, the valve shaft penetrates through the center of the valve body and the valve plate, the valve shaft penetrates through the side wall of one side of the valve body and is fixedly connected with the hand wheel disc, a driving piece is connected between the hand wheel disc and the valve shaft, the driving piece can enable the hand wheel disc and the valve shaft to synchronously rotate, the butterfly valve also comprises a limiting mechanism, the limiting mechanism comprises a fixed disk and a limiting rod, the fixed disk is fixedly connected on the outer side wall of the valve body through a supporting frame, the fixed disk and the center of the handwheel disk are on the same straight line, the fixed disk is positioned between the handwheel disk and the valve body, the limiting rod is fixedly connected on the edge of one side of the fixed disk close to the handwheel disk, the hand wheel disc is provided with a first hole, the limiting rod is of an elastic telescopic structure, and the limiting rod can be in plug-in fit with the first hole. The utility model discloses a when needs are with valve seal, the valve plate is difficult for changeing the function that is in the state with the valve body is sealed.

Description

Butterfly valve with limiting function

Technical Field

The utility model relates to the technical field of valves, in particular to butterfly valve with limit function.

Background

The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, mainly plays a role in cutting off and throttling on a pipeline, and commonly used valve types comprise a shut-off valve, a check valve, a butterfly valve and the like.

The butterfly valve in the prior art comprises a valve body with a hollow interior, a valve shaft vertically penetrating through the valve body, a valve plate sleeved outside the valve shaft and a hand wheel disc, wherein the valve shaft penetrates through the valve body and is fixedly connected with the hand wheel. When the valve is used, a worker rotates the hand wheel, the hand wheel drives the valve shaft to rotate, and the valve shaft drives the valve plate to rotate around the axis of the valve plate in the valve body, so that the aim of opening and closing or adjusting the liquid flow is fulfilled.

The shortcoming of the above-mentioned prior art lies in, when needing to seal the valve, because staff manual operation, the inside condition of valve body can't be observed to the difficult accurate control of pivoted angle and staff, consequently can make the valve plate rotate the encapsulated situation of valve plate and valve body when rotating the wrench, and then leads to having the clearance between valve plate and the valve body, and then makes difficult regulation valve be in encapsulated situation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a butterfly valve with limit function has realized when needs are with valve seal that the valve plate is difficult for changeing the function that is in the state with the valve body seal.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a butterfly valve with a limiting function comprises a valve body, a valve shaft, a valve plate and a hand wheel disc, wherein the valve body is hollow, the valve plate is disc-shaped, the valve shaft penetrates through the center of the valve body and the center of the valve plate, the valve shaft penetrates through the side wall of one side of the valve body and is fixedly connected with the hand wheel disc, the valve shaft can drive the valve plate to rotate around the axis of the valve plate, a driving piece is connected between the hand wheel disc and the valve shaft, the driving piece can enable the hand wheel disc and the valve shaft to synchronously rotate, the butterfly valve further comprises a limiting mechanism, the limiting mechanism comprises a fixed disc and a limiting rod, the fixed disc is fixedly connected onto the outer side wall of the valve body through a supporting frame, the fixed disc and the center of the hand wheel disc are on the same straight line, the fixed disc is positioned between the hand wheel disc and the valve body, the limiting rod is, the limiting rod can be matched with the first hole in an inserting mode.

By adopting the technical scheme, in an initial state, the valve plate and the inner side wall of the valve body are in a sealing state, the end part of the limiting rod far away from the fixed disc penetrates through the first hole, when the valve needs to be opened, a worker compresses the limiting rod to take the limiting rod out of the first hole, so that the end part of the limiting rod is abutted against the end surface of the hand wheel disc, then the worker rotates the hand wheel disc, the limiting rod slides along the end surface of the hand wheel disc, when the hand wheel disc rotates until the limiting rod is inserted into the first hole again, the hand wheel disc and the valve plate rotate 360 degrees, the valve is in a sealing state again, the limiting rod is in plug fit with the first hole, the limiting rod plays a role in abutting limit on the hand wheel disc, so that the hand wheel disc is not easy to rotate continuously, further, the worker is not easy to cause the valve plate to rotate through the sealing state due to overlarge force applied by the hand wheel disc, and, the valve plate is not easy to rotate, and the pressure resistance of the valve is enhanced.

The utility model discloses further set up to: the gag lever post sets up two along the circumference direction of fixed disk, and the angle between the adjacent gag lever post is 180 degrees.

Through adopting above-mentioned technical scheme, during initial condition, the valve plate is in encapsulated situation with the valve body inside wall, two gag lever posts all pass first hole this moment, when needing to open the valve, the staff compresses two gag lever posts in step, make the gag lever post take out from first downthehole, then the staff rotates the hand wheel dish, make the terminal surface butt of gag lever post tip and hand wheel dish, the hand wheel dish rotates the in-process, two gag lever posts slide along the terminal surface of hand wheel dish, insert the first downthehole once more until the gag lever post under the spring force of spring, the hand wheel dish rotates 180 degrees this moment, the hand wheel dish drives valve shaft and valve plate and all rotates 180 degrees, the valve is in encapsulated situation once more, consequently, realized that the staff rotates the hand wheel dish 180 degrees and can adjust the valve for encapsulated situation's function once more, consequently, the regulating efficiency of valve state has been improved.

The utility model discloses further set up to: the gag lever post includes dead lever, peg graft pole and spring, dead lever fixed connection is on the fixed disk, the dead lever perpendicular to fixed disk, the fixed orifices has been seted up in the dead lever, peg graft pole and fixed orifices grafting cooperation, the spring is located the fixed orifices, the both ends of spring respectively with the tip butt of dead lever and peg graft pole, the fixed dog that is provided with on the terminal surface of spring is kept away from to the fixed orifices, the end fixing of keeping away from the spring at the peg graft pole is provided with the grafting dog, fixed dog plays the butt limiting displacement to the grafting dog.

By adopting the technical scheme, when the hand wheel disc rotates to the position where the first hole is opposite to the limiting rod, the limiting rod is in inserted fit with the first hole under the elastic force action of the spring, so that the function of limiting the hand wheel disc is realized; when the valve plate needs to be rotated, the spring is compressed, so that the insertion rod is abutted against the end face of the hand wheel disc under the elastic action of the spring, the insertion rod slides along the end face of the hand wheel disc, and the function of interference caused by the rotation of the limiting rod on the hand wheel disc is achieved.

The utility model discloses further set up to: the fixed slot has been seted up on the periphery wall of dead lever, fixed slot and fixed orifices intercommunication, and the fixed slot sets up along the axial direction of dead lever, fixedly connected with handle on the periphery wall of grafting pole, and the handle passes the fixed slot.

Through adopting above-mentioned technical scheme, when needs take out the peg graft pole from the first downthehole time, staff's accessible drives the peg graft pole along fixed slot pulling handle and removes, makes the peg graft pole be close to the spring and further compress the spring for the peg graft pole is convenient to be taken out from the first downthehole.

The utility model discloses further set up to: the end face, close to the fixed disc, of the hand wheel disc is provided with a sliding groove, the sliding groove is arranged along the circumferential direction of the hand wheel disc, and the end part, far away from the fixed disc, of the limiting rod is connected with the sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, the tip and the sliding tray sliding connection of gag lever post consequently make the hand rim plate rotate the difficult position emergence skew with the gag lever post of in-process, and then conveniently make gag lever post and first hole grafting cooperation.

The utility model discloses further set up to: the end part of the limiting rod far away from the fixed plate is made of polytetrafluoroethylene.

Through adopting above-mentioned technical scheme, polytetrafluoroethylene coefficient of friction is less, consequently makes the frictional force between gag lever post and the hand wheel dish less, hand wheel dish and gag lever post butt, and when the staff rotated, the hand wheel dish can be followed the gag lever post and taken place to rotate, realizes opening the function of valve.

The utility model discloses further set up to: the edge of the end face, far away from the fixed disc, of the hand wheel disc is fixedly connected with a rotating rod, and the rotating rod is perpendicular to the plane where the hand wheel disc is located.

Through adopting above-mentioned technical scheme, the staff rotates the dwang, can drive the hand rim plate and rotate, when realizing that the staff is manual to rotate the hand rim plate, the staff needn't rotate the periphery wall of hand rim plate, consequently makes the gag lever post be difficult for causing the interference to the staff.

The utility model discloses further set up to: the valve body is internally provided with a circulation hole, the circulation hole is arranged along the axis direction of the valve body, the valve plate is positioned in the circulation hole, the inner diameter side wall of the circulation hole, which is opposite to the valve plate, comprises a sealing surface and a resisting surface, the sealing surface is positioned between the two resisting surfaces, the cross section of the sealing surface is circular, the resisting surface is an inclined surface, the diameter of the resisting surface is larger than that of the sealing surface, and the resisting surface is obliquely arranged towards the direction close to the sealing surface.

By adopting the technical scheme, when the flowing medium in the pipeline flows to the blocking surface, the blocking surface is obliquely arranged, so that the impact force of the flowing medium is decomposed into the decomposition force along the oblique direction of the blocking surface and the decomposition force along the radial direction of the valve body by the blocking surface, and the impact force of the flowing medium on the valve body and the valve plate is reduced.

To sum up, the utility model discloses following technological effect has:

1. by adopting the structure of the limiting mechanism, the valve plate is not easy to rotate and is in a state of being sealed with the valve body when the valve needs to be sealed;

2. by adopting the structure of the spring, the function that the limiting rod automatically limits the hand wheel disc when the valve plate rotates to a sealing state is realized;

3. through the structure that adopts the sliding tray, realized making the hand wheel dish rotate more stable function for the gag lever post.

Drawings

FIG. 1 is a three-dimensional perspective view of the present embodiment;

FIG. 2 is a partial three-dimensional schematic view of the configuration of the protruding drive member and the spacing mechanism;

fig. 3 is a partial sectional view of the internal structure of the protruding stop.

In the figure, 1, a valve body; 11. a flow-through hole; 12. a sealing surface; 13. a resisting surface; 14. a support frame; 15. a seal ring; 151. folding the plate; 16. a connecting seat; 2. a valve plate; 3. a valve shaft; 4. a hand wheel disc; 41. a first hole; 42. a sliding groove; 43. rotating the rod; 5. a drive member; 51. a worm gear; 52. a worm; 6. a limiting mechanism; 61. fixing the disc; 62. a limiting rod; 621. fixing the rod; 6211. a fixing hole; 6212. fixing grooves; 6213. fixing a stop block; 622. a plug rod; 6221. inserting a stop block; 6222. a spherical portion; 6223. a handle; 6224. a connecting rod; 623. a spring.

Detailed Description

As shown in fig. 1, the utility model provides a butterfly valve with limit function, including valve body 1, valve plate 2, valve shaft 3, hand wheel dish 4, driving piece 5 (as shown in fig. 2) and stop

gear

6, 1 inside cavity of valve body, valve plate 2 is discoid, valve shaft 3 runs through the center department of valve body 1 and valve plate 2, valve shaft 3 can drive valve plate 2 and rotate around its axis, valve shaft 3 passes one side lateral wall of valve body 1 and is connected with driving piece 5, driving piece 5 can make hand wheel dish 4 and valve shaft 3 rotate in step, stop gear 6 sets up between 1 lateral wall of valve body and hand wheel dish 4, when valve plate 2 and valve body 1 are in encapsulated situation, stop gear 6 plays limiting displacement to the rotation of hand wheel dish 4. During initial state,

valve plate

2 and 1 inside wall of valve body are in encapsulated situation, stop gear 6 plays limiting displacement to hand rim plate 4, then the staff removes 6 spacing to hand rim plate 4 of stop gear, make hand rim plate 4 continue to rotate, when hand rim plate 4 drives valve plate 2 through driving piece 5 and rotates to encapsulated situation once more, stop gear 6 plays limiting displacement to hand rim plate 4 automatically once more, and then make the staff be difficult for leading to valve plate 2 to rotate encapsulated situation because of the too big application of force of hand rim plate 4, consequently, the accuracy of valve state regulation has been promoted.

As shown in fig. 1, a flow hole 11 is formed in a valve body 1, the flow hole 11 is arranged along the axial direction of the valve body 1, a valve plate 2 is positioned in the flow hole 11, the inner diameter side wall of the flow hole 11 opposite to the valve plate 2 comprises a sealing surface 12 and a resisting surface 13, the sealing surface 12 is positioned between the two resisting surfaces 13, the cross section of the sealing surface 12 is circular, the resisting surface 13 is an inclined surface, the diameter of the resisting surface 13 is larger than that of the sealing surface 12, and the resisting surface 13 is inclined towards the direction close to the sealing surface 12. When the flowing medium in the pipe flows to the abutting surface 13, since the abutting surface 13 is obliquely arranged, the abutting surface 13 decomposes the impact force of the flowing medium into a decomposition force in the direction in which the abutting surface 13 is inclined and a decomposition force in the radial direction of the valve body 1, thereby reducing the impact force of the flowing medium to the valve body 1 and the valve plate 2.

As shown in fig. 1, sealing rings 15 are fixedly arranged on both end faces of the valve body 1, when the valve body 1 is connected with a pipeline, the sealing rings are clamped between the pipeline and the end faces of the valve body 1, and the deformability of the sealing rings can fill a gap between the pipeline and the valve body 1, so that the connection sealing property between the pipeline and the valve body 1 is enhanced; one side of the sealing ring 15 is fixedly connected with a folded plate 151, the sealing ring 15 can deform or be easily separated from the valve body 1 after being used for a long time, and when the sealing ring 15 is replaced, a worker can hold the folded plate 151 and pull the sealing ring 15 to separate the sealing ring 15 from the valve body 1.

As shown in fig. 2, the driving member 5 includes a worm wheel 51 and a worm 52, the worm wheel 51 is fixedly connected to the end of the valve shaft 3 penetrating through the side wall of the valve body 1, and then, as shown in fig. 1, the connecting seat 16 is fixedly arranged on the outer side wall of the valve body 1, the worm 52 is rotatably arranged in the connecting seat 16 along the horizontal direction, the worm wheel 51 and the worm 52 are engaged with each other, and the handwheel 4 is fixedly connected to the outer side wall of the. When the hand wheel disc 4 is rotated, the worm 52 drives the worm wheel 51 to rotate, namely, the valve shaft 3 can rotate around the axis direction, and the valve shaft 3 drives the valve plate 2 to rotate, so that the function of controlling the opening and closing of the valve is realized.

As shown in fig. 2, stop gear 6 includes fixed disk 61 and gag lever post 62, fixed disk 61 passes through support frame 14 fixed connection on the lateral wall of valve body 1, fixed disk 61 and the 4 centre of a circle of hand wheel dish are on the collinear, fixed disk 61 is located between hand wheel dish 4 and the valve body 1, gag lever post 62 fixed connection is on the border that fixed disk 61 is close to hand wheel dish 4 one side, it is shown in fig. 3 to combine again, first hole 41 has been seted up on hand wheel dish 4, gag lever post 62 is the elastic expansion structure, gag lever post 62 can be close to the terminal surface butt of fixed disk 61 with hand wheel dish 4, gag lever post 62 can be pegged graft with first hole 41 and cooperate. In an initial state, the valve plate 2 and the inner side wall of the valve body 1 are in a sealed state, the end part, far away from the fixed disc 61, of the limiting rod 62 penetrates through the first hole 41, when the valve needs to be opened, a worker compresses the limiting rod 62 to enable the limiting rod 62 to be taken out of the first hole 41, the end part of the limiting rod 62 is abutted to the end surface of the hand wheel disc 4, then the worker rotates the hand wheel disc 4, the limiting rod 62 slides along the end surface of the hand wheel disc 4, when the hand wheel disc 4 rotates until the limiting rod 62 is inserted into the first hole 41 again, the hand wheel disc 4 and the valve plate 2 both rotate 360 degrees, the valve is in a sealed state again, the limiting rod 62 is in inserting fit with the first hole 41, the limiting rod 62 plays a limiting role in abutting against the hand wheel disc 4, therefore, the hand wheel disc 4 is not prone to continue to rotate, and the worker is not prone to cause the valve plate 2, meanwhile, the hand wheel disc 4 is limited, so that when the valve plate 2 is subjected to large fluid resistance, the valve plate 2 is not easy to rotate, and the pressure resistance of the valve is enhanced.

The quantity that gag lever post 62 set up along the radial direction of fixed disk 61 is one, then hand wheel dish 4 need rotate 360 degrees, and stop gear 6 just can carry on spacingly again adversary's rim plate 4, consequently makes the valve adjustment be encapsulated situation's efficiency lower, in order to improve the regulation efficiency of valve state, as shown in fig. 2, the utility model discloses set up two gag lever post 62 along the circumferential direction of fixed disk 61, the angle between the adjacent gag lever post 62 is 180 degrees. In the initial state, the valve plate 2 and the inner side wall of the valve body 1 are in a sealing state, at the moment, the two limit rods 62 both penetrate through the first hole 41, when the valve needs to be opened, a worker synchronously compresses the two limit rods 62, so that the limit rods 62 are taken out of the first hole 41, then the staff rotates the hand wheel disc 4 to make the end part of the limit rod 62 abut against the end surface of the hand wheel disc 4, during the rotation process of the hand wheel disc 4, the two limit rods 62 slide along the end face of the hand wheel disc 4 until the limit rods 62 are inserted into the first hole 41 again under the action of the elastic force of the spring 623, at this time, the hand wheel disc 4 rotates 180 degrees, the hand wheel disc 4 drives the valve shaft 3 and the valve plate 2 to rotate 180 degrees, the valve is in a sealed state again, therefore, the function that the valve can be adjusted to be in a sealing state again by rotating the hand wheel disc 4 by 180 degrees by a worker is realized, and the adjusting efficiency of the valve state is improved.

As shown in fig. 3, the limiting rod 62 includes a fixing rod 621, an inserting rod 622 and a spring 623, the fixing rod 621 is fixedly connected to the fixing disc 61, the fixing rod 621 is perpendicular to the fixing disc 61, a fixing hole 6211 is formed in the fixing rod 621, the inserting rod 622 is inserted into and matched with the fixing hole 6211, the spring 623 is located in the fixing hole 6211, two ends of the spring 623 are respectively abutted to end portions of the fixing rod 621 and the inserting rod 622, a fixing stop 6213 is fixedly arranged on an end face of the fixing hole 6211 far away from the spring 623, an inserting stop 6221 is fixedly arranged on an end portion of the inserting rod 622 far away from the spring 623, and the fixing stop 6213 plays an abutting limiting role in abutting to the inserting. When the hand wheel disc 4 rotates to the position that the first hole 41 is opposite to the limiting rod 62, the limiting rod 62 is in inserted fit with the first hole 41 under the elastic force action of the spring 623, so that the function of limiting the hand wheel disc 4 is realized; when the valve plate 2 needs to be rotated, the spring 623 is compressed, so that the insertion rod 622 is abutted against the end face of the hand wheel disc 4 under the elastic force action of the spring 623, and the insertion rod 622 slides along the end face of the hand wheel disc 4, thereby realizing the function that the limiting rod 62 is not easy to interfere with the rotation of the hand wheel disc 4.

In order to facilitate the adjustment of the position of the insertion rod 622 by the worker, as shown in fig. 2, the utility model discloses seted up fixed slot 6212 on the peripheral wall of dead lever 621, fixed slot 6212 communicates with fixed orifices 6211, and fixed slot 6212 sets up along the axial direction of dead lever 621, fixedly connected with handle 6223 on the peripheral wall of insertion rod 622, and handle 6223 passes fixed slot 6212, and two adjacent handles 6223 pass through connecting rod 6224 fixed connection. When the inserting rods 622 need to be taken out of the first hole 41, a worker can push the connecting rods 6224 to drive the two inserting rods 622 to move, so that the inserting rods 622 are close to the springs 623 and the springs 623 are further compressed, and the inserting rods 622 can be conveniently taken out of the first hole 41.

In order to improve the sliding stability of the insertion rod 622 along the rotation of the handwheel disc 4, as shown in fig. 2, a sliding groove 42 is formed in the end face, close to the fixed disc 61, of the handwheel disc 4, the sliding groove 42 is arranged along the circumferential direction of the handwheel disc 4, and as shown in fig. 3, the end part, far away from the spring 623, of the insertion rod 622 is fixedly connected with a spherical part 6222, the spherical part 6222 is in sliding fit with the sliding groove 42, the spherical part 6222 can be in insertion fit with the first hole 41, the contact surface between the spherical part 6222 and the handwheel disc 4 is an arc-shaped surface, so when the handwheel disc 4 rotates, the sliding of the spherical part 6222 along the sliding groove 42 is smoother, the sliding groove 42 plays a limiting role on the spherical part 6222, and therefore.

When rotating for further clearance handwheel dish 4, frictional force between spherical portion 6222 and the sliding tray 42, the utility model discloses a spherical portion 6222's material be polytetrafluoroethylene, and polytetrafluoroethylene coefficient of friction is less, consequently makes the frictional force between gag lever post 62 and the handwheel dish 4 less, handwheel dish 4 and gag lever post 62 butt, and when the staff rotated, handwheel dish 4 can be followed gag lever post 62 and taken place to rotate, realized opening the function of valve.

In order to facilitate the worker to rotate the handwheel disk 4, as shown in fig. 2, a rotating rod 43 is fixedly connected to the edge of the handwheel disk 4 far from the end surface of the fixed disk 61, and the rotating rod 43 is perpendicular to the plane of the handwheel disk 4. The staff rotates dwang 43, can drive the hand rim plate 4 and rotate, when realizing that the staff is manual to rotate hand rim plate 4, the staff needn't rotate the periphery wall of hand rim plate 4, consequently makes gag lever post 62 be difficult for causing the interference to the staff.

The utility model discloses a theory of operation does:

when the valve needs to be opened, a worker grasps the connecting rod 6224 to drive the two insertion rods 622 to move, so that the spring 623 is further compressed, then the worker rotates the hand wheel disc 4, the hand wheel disc 4 drives the worm 52 to rotate, the worm 52 drives the worm wheel 51 to rotate, the valve shaft 3 and the valve plate 2 are driven to rotate, the two spherical parts 6222 slide along the sliding groove 42 until the spherical parts 6222 are inserted into the first hole 41 again under the elastic force of the spring 623, at the moment, the hand wheel disc 4 rotates 180 degrees, the hand wheel disc 4 drives the valve shaft 3 and the valve plate 2 to rotate 180 degrees, the valve is in a sealing state again, and therefore the function that the worker can adjust the valve to be in the sealing state again by rotating the hand wheel disc 4 180 degrees is achieved, when the valve needs to be sealed, the valve plate 2 is not easy to rotate and is in a state of being sealed with the valve body 1.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The butterfly valve with the limiting function comprises a valve body (1), a valve shaft (3), a valve plate (2) and a hand wheel disc (4), wherein the valve body (1) is hollow, the valve plate (2) is disc-shaped, the valve shaft (3) penetrates through the center of the valve body (1) and the valve plate (2), the valve shaft (3) penetrates through the side wall of one side of the valve body (1) and is fixedly connected with the hand wheel disc (4), the valve shaft (3) can drive the valve plate (2) to rotate around the axis of the valve shaft, a driving piece (5) is connected between the hand wheel disc (4) and the valve shaft (3), the driving piece (5) can enable the hand wheel disc (4) and the valve shaft (3) to synchronously rotate, and the butterfly valve is characterized by further comprising a limiting mechanism (6), the limiting mechanism (6) comprises a fixed disc (61) and a limiting rod (62), the fixed disc (61) is fixedly connected on the, fixed disk (61) and hand rim plate (4) centre of a circle are on same straight line, fixed disk (61) are located between hand rim plate (4) and valve body (1), gag lever post (62) fixed connection is on fixed disk (61) are close to the border of hand rim plate (4) one side, first hole (41) have been seted up on hand rim plate (4), gag lever post (62) are elastic telescopic structure, gag lever post (62) can be close to the terminal surface butt of fixed disk (61) with hand rim plate (4), gag lever post (62) can be pegged graft the cooperation with first hole (41).

2. The butterfly valve with the limiting function according to claim 1, wherein two limiting rods (62) are arranged along the circumferential direction of the fixed disk (61), and the angle between adjacent limiting rods (62) is 180 degrees.

3. The butterfly valve with the limiting function according to claim 2, wherein the limiting rod (62) comprises a fixing rod (621), an inserting rod (622) and a spring (623), the fixing rod (621) is fixedly connected to the fixing disc (61), the fixing rod (621) is perpendicular to the fixing disc (61), a fixing hole (6211) is formed in the fixing rod (621), the inserting rod (622) is inserted into the fixing hole (6211), the spring (623) is located in the fixing hole (6211), two ends of the spring (623) are respectively abutted to ends of the fixing rod (621) and the inserting rod (622), a fixed stop block (6213) is fixedly arranged on the end surface of the fixed hole (6211) far away from the spring (623), an inserting stop block (622l) is fixedly arranged at the end part, far away from the spring (623), of the inserting rod (622), and the fixed stop block (6213) plays a role in abutting and limiting the inserting stop block (622 l).

4. The butterfly valve with the limiting function according to claim 3, wherein a fixing groove (6212) is formed in the peripheral wall of the fixing rod (621), the fixing groove (6212) is communicated with the fixing hole (6211), the fixing groove (6212) is arranged along the axial direction of the fixing rod (621), a handle (6223) is fixedly connected to the peripheral wall of the insertion rod (622), and the handle (6223) penetrates through the fixing groove (6212).

5. The butterfly valve with the limiting function according to claim 1, wherein a sliding groove (42) is formed in an end surface of the handwheel disk (4) close to the fixed disk (61), the sliding groove (42) is arranged along the circumferential direction of the handwheel disk (4), and the end part of the limiting rod (62) far away from the fixed disk (61) is connected with the sliding groove (42) in a sliding manner.

6. The butterfly valve with a limiting function according to claim 1, wherein the end of the limiting rod (62) away from the fixing plate is made of polytetrafluoroethylene.

7. The butterfly valve with the limit function according to claim 1, characterized in that a rotation rod (43) is fixedly connected to the edge of the end surface of the handwheel disk (4) far away from the fixed disk (61), and the rotation rod (43) is perpendicular to the plane of the handwheel disk (4).

8. The butterfly valve with the limiting function according to claim 1, wherein a flow hole (11) is formed in the valve body (1), the flow hole (11) is arranged along an axial direction of the valve body (1), the valve plate (2) is positioned in the flow hole (11), an inner diameter side wall of the flow hole (11) opposite to the valve plate (2) comprises a sealing surface (12) and a resisting surface (13), the sealing surface (12) is positioned between the two resisting surfaces (13), the cross section of the sealing surface (12) is circular, the resisting surface (13) is an inclined surface, the diameter of the resisting surface (13) is larger than that of the sealing surface (12), and the resisting surface (13) is inclined towards the direction close to the sealing surface (12).