CN111878591A

CN111878591A - Eccentric butterfly valve

Info

Publication number: CN111878591A
Application number: CN202010774663.4A
Authority: CN
Inventors: 蒋友亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2020-11-03

Abstract

The invention discloses an eccentric butterfly valve which comprises a valve body, a flange plate, a first connecting seat, a second connecting seat, a first shell, a second shell, a first hand wheel, a second hand wheel, a first oiling rubber plug, a pore, a second oiling rubber plug, an annular scale, a first rotating shaft, a pointer, a valve plate, a base, a cylinder, an electromagnet, a movable core column, a sealing ring, a worm wheel, a worm, a second rotating shaft, a third rotating shaft, a first bevel gear, a second bevel gear, a fourth rotating shaft, a valve rod, a first filling sealing layer, a connecting rod, a shaft sleeve, a second filling sealing layer, a battery, a switch, a connecting column, an iron block and a spring. According to the butterfly valve, the first hand wheel is driven by the worm wheel and the worm to decelerate, the valve plate is controlled to rotate, the speed can be reduced, the butterfly valve can be adjusted slowly, the opening and closing size of the butterfly valve can be adjusted, the speed increasing device is additionally arranged on the second hand wheel, the rotation can be accelerated, the butterfly valve can be opened quickly, and the opening efficiency is improved.

Description

Eccentric butterfly valve

Technical Field

The invention relates to a butterfly valve, in particular to an eccentric butterfly valve, and belongs to the technical field of application of eccentric butterfly valves.

Background

The eccentric butterfly valve is divided into a single eccentric butterfly valve, a double eccentric butterfly valve, a triple eccentric butterfly valve and a variable eccentric butterfly valve; opposite the concentric butterfly valve; the butterfly valve in which the axis of the valve rod deviates from the center of the disk and the center of the body at the same time and the sealing pair is an oblique cone is called an eccentric butterfly valve.

The existing eccentric butterfly valve is generally internally driven by a worm wheel and a worm to realize the control of opening and closing of a valve plate; when the worm wheel and the worm are used for transmission, a speed reduction effect is achieved, and the opening efficiency is low; sometimes, when the quick opening is performed, the operation is inconvenient, and the quick opening is inconvenient. Therefore, an eccentric butterfly valve is proposed to solve the above problems.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide an eccentric butterfly valve.

The invention realizes the purpose through the following technical scheme, and the eccentric butterfly valve comprises a valve body and a first shell, wherein a first connecting seat is fixedly installed at the top of the valve body, a second connecting seat is fixedly installed at the bottom of the first shell, the first connecting seat and the second connecting seat are fixedly connected, a self-locking rotating mechanism is arranged in the first shell, a valve rod is fixedly installed at the output end of the self-locking rotating mechanism, a valve plate is fixedly installed on the surface of the valve rod, a sealing ring is fixedly sleeved on the surface of the valve plate, a bottom end supporting mechanism is arranged at the bottom end of the valve rod, the valve rod penetrates through the first connecting seat and the second connecting seat, and a first filling sealing layer is filled between the valve rod and the first connecting seat and the second connecting seat;

a second shell is fixedly installed on one side of the first shell, a speed increasing mechanism is arranged inside the second shell, the self-locking rotating mechanism is provided with two input ends, a first hand wheel is fixedly installed at one input end of the self-locking rotating mechanism, the other input end of the self-locking rotating mechanism is connected with the output end of the speed increasing mechanism, and a second hand wheel is fixedly installed at the input end of the speed increasing mechanism;

the self-locking rotating mechanism is composed of a worm wheel, a worm, a first rotating shaft and a second rotating shaft, the second rotating shaft is rotatably installed on one side of the first shell, the first rotating shaft is rotatably installed on the top of the first shell, one end of the second rotating shaft is fixedly connected with one end of the worm, the bottom end of the first rotating shaft is fixedly sleeved with the worm wheel, the worm and the worm wheel are meshed, the end part of the second rotating shaft is connected with the first hand wheel, a pointer is fixedly installed at the top end of the first rotating shaft, annular scales are marked on the top of the first shell, and the bottom end of the first rotating shaft is fixedly connected with the top end of the valve rod;

the locking mechanism comprises a cylinder and an electromagnet fixedly mounted at one end of the cylinder, a movable core column is connected in the cylinder in a matched manner, a connecting column is fixedly mounted at one end of the movable core column, an iron block is fixedly mounted at the tail end of the connecting column, a spring is sleeved on the surface of the connecting column, the connecting column is elastically connected with the inner wall of the cylinder through the spring, and a power supply mechanism is fixedly mounted on the outer wall of the first shell;

first casing top and second casing top fixed gomphosis respectively install first refuel rubber buffer and the second refuel rubber buffer.

Preferably, the front and the back of the valve body are fixedly welded with flange plates, and a plurality of mounting holes are uniformly formed around the flange plates.

Preferably, the bottom supporting mechanism is filled the sealing layer by base, connecting rod, axle sleeve and second and constitutes, base fixed mounting is in the bottom of valve body, the top and the valve rod bottom rigid coupling of connecting rod, the axle sleeve cup joints with the bottom of connecting rod, and the axle sleeve gomphosis installs the inside at the base, the connecting rod runs through the valve body bottom, and the connecting rod fills the sealing layer with the second of valve body junction.

Preferably, the speed increasing mechanism is composed of a third rotating shaft, a first bevel gear, a second bevel gear and a fourth rotating shaft, the third rotating shaft and the fourth rotating shaft are respectively rotatably installed on one side of the first shell and one side of the second shell, the third rotating shaft is fixedly sleeved with the first bevel gear, the fourth rotating shaft is fixedly sleeved with the second bevel gear, the first bevel gear and the second bevel gear are meshed, the fourth rotating shaft is connected with the second bevel gear, one end of the third rotating shaft is fixedly connected with one end of a worm, and the diameter of the second bevel gear is three times that of the first bevel gear.

Preferably, the spring is positioned between the iron block and the movable core column, one end of the spring is fixedly connected with the surface of the connecting column, and the other end of the spring is fixedly connected with the inner wall of the cylinder.

Preferably, the diameter of the iron block is the same as that of the movable core column, and the surface of the movable core column is sleeved with the rubber sleeve.

Preferably, the power supply mechanism comprises a switch and a battery, the battery and the switch are fixedly mounted on the first shell, and the battery and the switch are electrically connected with the electromagnet.

Preferably, first refuel rubber buffer and second refuel the rubber buffer and be the cylinder type structure, and first refuel rubber buffer middle part and second refuel the rubber buffer middle part and all opened the pore.

Preferably, the surface of the valve rod is fixedly provided with a plurality of connecting blocks at equal intervals, and the connecting blocks are fixedly connected with the surface of the valve plate.

Preferably, the first hand wheel and the second hand wheel are both formed by a circular ring and two connecting rods, and the two connecting rods are fixedly installed on the inner wall of the circular ring.

The invention has the beneficial effects that:

1. the eccentric butterfly valve is provided with a first hand wheel and a second hand wheel, the whole butterfly valve can be controlled on any side, the first hand wheel is driven by a worm wheel and a worm to decelerate, the rotation of a valve plate can be controlled, the deceleration can be realized, the slow adjustment can be conveniently carried out, the opening and closing size of the butterfly valve can be adjusted, and the second hand wheel is additionally provided with a speed increasing device which can accelerate the rotation, so that the butterfly valve can be quickly opened conveniently, the opening efficiency is improved, and the convenience is provided for the whole use;

2. when the eccentric butterfly valve is opened, the eccentric butterfly valve extends out of the top of the first shell through the first rotating shaft, and is simultaneously provided with the pointer and the annular scale, so that the valve plate can be conveniently watched when being adjusted, the adjusting position can be conveniently known, convenience is brought to adjustment of a user, and feedback is conveniently provided;

3. this kind of eccentric formula butterfly valve both sides are provided with locking mechanism, can carry out the spacing of valve plate, before relieving spacingly, can avoid the valve plate to rotate, when carrying out opening of butterfly valve, must carry out opening of locking mechanism, just can carry out the operation of first hand wheel and second hand wheel, avoid the mistake of first hand wheel and second hand wheel to change, have improved the accuracy of whole use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

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

FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic view of a valve stem mounting arrangement of the present invention;

FIG. 4 is a schematic view of the internal structure of the cylinder of the present invention;

fig. 5 is a schematic view of the structure of the first refueling rubber stopper and the fine hole of the present invention.

In the figure: 1. the valve body, 2, the ring flange, 3, first connecting seat, 4, the second connecting seat, 5, the first casing, 6, the second casing, 7, first hand wheel, 8, the second hand wheel, 9, first refuel rubber buffer, 901, the pore, 10, the second refuel rubber buffer, 11, annular scale, 12, first pivot, 13, the pointer, 14, the valve plate, 15, the base, 16, the drum, 17, the electro-magnet, 18, the activity stem, 19, the sealing washer, 20, the worm wheel, 21, the worm, 22, the second pivot, 23, the third pivot, 24, first bevel gear, 25, the second bevel gear, 26, the fourth pivot, 27, the valve rod, 28, the first packing sealing layer, 29, the connecting rod, 30, the axle sleeve, 31, the second packing sealing layer, 32, the battery, 33, the switch, 34, the connecting post, 35, the iron plate, 36, the spring.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Referring to fig. 1-5, an eccentric butterfly valve includes a valve body 1 and a first housing 5, a first connection seat 3 is fixedly installed at the top of the valve body 1, a second connection seat 4 is fixedly installed at the bottom of the first housing 5, the first connection seat 3 and the second connection seat 4 are fixedly connected, a self-locking rotation mechanism is arranged inside the first housing 5, a valve rod 27 is fixedly installed at an output end of the self-locking rotation mechanism, a valve plate 14 is fixedly installed on the surface of the valve rod 27, a sealing ring 19 is fixedly sleeved on the surface of the valve plate 14, a bottom end supporting mechanism is arranged at the bottom end of the valve rod 27, the valve rod 27 penetrates through the first connection seat 3 and the second connection seat 4, and a first filling sealing layer 28 is filled between the valve rod 27 and the first connection seat 3 and the second connection seat 4;

a second shell 6 is fixedly installed on one side of the first shell 5, an acceleration mechanism is arranged inside the second shell 6, the self-locking rotating mechanism is provided with two input ends, a first hand wheel 7 is fixedly installed at one input end of the self-locking rotating mechanism, the other input end of the self-locking rotating mechanism is connected with the output end of the acceleration mechanism, and a second hand wheel 8 is fixedly installed at the input end of the acceleration mechanism;

the self-locking rotating mechanism is composed of a worm wheel 20, a worm 21, a first rotating shaft 12 and a second rotating shaft 22, the second rotating shaft 22 is rotatably installed at one side of the first housing 5, the first rotating shaft 12 is rotatably installed at the top of the first housing 5, one end of the second rotating shaft 22 is fixedly connected with one end of the worm 21, the bottom end of the first rotating shaft 12 is fixedly sleeved with the worm wheel 20, the worm 21 is meshed with the worm wheel 20, the end part of the second rotating shaft 22 is connected with the first hand wheel 7, the top end of the first rotating shaft 12 is fixedly provided with a pointer 13, the top of the first shell 5 is marked with an annular scale 11, the bottom end of the first rotating shaft 12 is fixedly connected with the top end of the valve rod 27, when the worm 21 rotates, the worm 21 can drive the worm wheel 20 to rotate through meshing, speed reduction transmission is realized, and meanwhile, the self-locking function is achieved, and the worm wheel 20 cannot reversely drive the worm 21 to rotate;

the locking mechanism is fixedly embedded on two sides of the valve body 1 and comprises a cylinder 16 and an electromagnet 17 fixedly mounted at one end of the cylinder 16, a movable core column 18 is connected inside the cylinder 16 in a matched mode, a connecting column 34 is fixedly mounted at one end of the movable core column 18, an iron block 35 is fixedly mounted at the tail end of the connecting column 34, a spring 36 is sleeved on the surface of the connecting column 34, the connecting column 34 is elastically connected with the inner wall of the cylinder 16 through the spring 36, a power supply mechanism is fixedly mounted on the outer wall of the first shell 5, and after the electromagnet 17 is powered off, the spring 36 provides restoring force for the movable core column 18 to enable the iron block 35 to be separated from the electromagnet 17;

first 5 tops of casing and 6 tops of second casing fixed gomphosis respectively install first refuel rubber buffer 9 and the second refuel rubber buffer 10, refuel rubber buffer 9 and second through first refuel rubber buffer 10 and can carry out inside lubricating oil that adds, realize lubricated.

The front and the back of the valve body 1 are fixedly welded with flange plates 2, a plurality of mounting holes are uniformly formed in the periphery of the flange plates 2, and the flange plates 2 are used for being connected with external pipelines to realize the opening and closing control of the connecting positions; the bottom end supporting mechanism is composed of a base 15, a connecting rod 29, a shaft sleeve 30 and a second filling sealing layer 31, the base 15 is fixedly installed at the bottom of the valve body 1, the top end of the connecting rod 29 is fixedly connected with the bottom end of the valve rod 27, the shaft sleeve 30 is sleeved with the bottom end of the connecting rod 29, the shaft sleeve 30 is installed inside the base 15 in an embedded mode, the connecting rod 29 penetrates through the bottom of the valve body 1, the second filling sealing layer 31 is filled at the connecting position of the connecting rod 29 and the valve body 1, and the bottom end supporting mechanism can provide support for the bottom end of the valve rod 27; the speed increasing mechanism comprises a third rotating shaft 23, a first bevel gear 24, a second bevel gear 25 and a fourth rotating shaft 26, the third rotating shaft 23 and the fourth rotating shaft 26 are respectively rotatably installed on one side of the first shell 5 and one side of the second shell 6, the third rotating shaft 23 is fixedly sleeved with the first bevel gear 24, the fourth rotating shaft 26 is fixedly sleeved with the second bevel gear 25, the first bevel gear 24 and the second bevel gear 25 are meshed, the fourth rotating shaft 26 is connected with the second hand wheel 8, one end of the third rotating shaft 23 is fixedly connected with one end of the worm 21, the diameter of the second bevel gear 25 is three times that of the first bevel gear 24, and after transmission, the speed increasing mechanism plays a role in increasing speed after transmission, improves the rotating speed of the third rotating shaft 23 and is convenient for quick opening; the spring 36 is positioned between the iron block 35 and the movable core column 18, one end of the spring 36 is fixedly connected with the surface of the connecting column 34, the other end of the spring 36 is fixedly connected with the inner wall of the cylinder 16, the spring 36 provides elastic force for the connecting column 34, and after the electromagnet 17 is powered off, the elastic force of the spring 36 provides pushing for the connecting column 34, so that the movable core column 18 can extend out conveniently; the diameter of the iron block 35 is the same as that of the movable core column 18, the surface of the movable core column 18 is sleeved with a rubber sleeve, the movable core column 18 is embedded in the cylinder 16, and the rubber sleeve is used for filling, so that the sealing performance is improved; the power supply mechanism is composed of a switch 33 and a battery 32, the battery 32 and the switch 33 are both fixedly installed on the first shell 5, the battery 32 and the switch 33 are both electrically connected with the electromagnet 17, power is supplied through the battery 32, and on-off control is realized through the switch 33; the first refueling rubber plug 9 and the second refueling rubber plug 10 are both of cylindrical structures, the middle parts of the first refueling rubber plug 9 and the second refueling rubber plug 10 are both provided with fine holes 901, and lubricating oil can be added through the fine holes 901 for lubrication; a plurality of connecting blocks are fixedly arranged on the surface of the valve rod 27 at equal intervals and fixedly connected with the surface of the valve plate 14, and the valve rod 27 can drive the valve plate 14 to rotate and open and close the valve plate 14; first hand wheel 7 and second hand wheel 8 constitute by ring and two connecting rods, two the connecting rod fixed mounting is on the inner wall of ring, for the user provides the position of gripping, can carry out manual rotation.

When the valve plate is used, when the valve plate 14 is closed, the movable core column 18 extends out of the cylinder 16 and can limit the valve plate 14 to avoid rotating the first hand wheel 7 and the second hand wheel 8 by mistake, when the valve plate 14 is opened, the battery 32 supplies power to the electromagnet 17 through the switch 33, the electromagnet 17 provides adsorption for the iron block 35 through magnetic force, the iron block 35 is contacted with the electromagnet 17, the movable core column 18 enters the cylinder 16, meanwhile, the spring 36 is compressed to store force, when the valve plate is quickly opened, the second hand wheel 8 is rotated, transmission is carried out through the second bevel gear 25 and the first bevel gear 24 to realize speed increase, then the worm 21 is rotated, meshing transmission is carried out between the worm 21 and the worm wheel 20 to realize rotation of the valve rod 27, so that the valve plate 14 is driven to rotate, and the valve body 1 can be opened;

slowly opening, when the opening size is accurately controlled, rotating the first hand wheel 7, enabling the first hand wheel 7 to drive the worm 21 to rotate, enabling the worm 21 and the worm wheel 20 to be in meshed transmission to achieve speed reduction, meanwhile, driving is provided for the valve rod 27, the valve plate 14 rotates to achieve opening, when the pointer 13 rotates, reading observation is conducted through the annular scale 11, the opening size is judged, feedback is provided, after adjustment is conducted, the first hand wheel 7 stops rotating, self-locking is conducted through the worm wheel 20 and the worm 21, and limiting is achieved;

during maintenance lubrication, lubricating oil is dropped through the fine holes 901, and the lubricating oil enters through the fine holes 901 and drops on the worm wheel 20 and the second bevel gear 25, so that during driving, the worm wheel 20, the worm 21, the first bevel gear 24, and the second bevel gear 25 are lubricated, and wear during driving is reduced.

It is well within the skill of those in the art to implement and protect the present invention without undue experimentation and without undue experimentation that the present invention is directed to software and process improvements.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An eccentric butterfly valve which is characterized in that: comprises a valve body (1) and a first shell (5), a first connecting seat (3) is fixedly arranged at the top of the valve body (1), the bottom of the first shell (5) is fixedly provided with a second connecting seat (4), the first connecting seat (3) and the second connecting seat (4) are fixedly connected, a self-locking rotating mechanism is arranged in the first shell (5), a valve rod (27) is fixedly arranged at the output end of the self-locking rotating mechanism, a valve plate (14) is fixedly arranged on the surface of the valve rod (27), a sealing ring (19) is fixedly sleeved on the surface of the valve plate (14), the bottom end of the valve rod (27) is provided with a bottom end supporting mechanism, the valve rod (27) penetrates through the first connecting seat (3) and the second connecting seat (4), a first filling sealing layer (28) is filled between the valve rod (27) and the first connecting seat (3) and between the valve rod and the second connecting seat (4);

a second shell (6) is fixedly mounted on one side of the first shell (5), a speed increasing mechanism is arranged inside the second shell (6), the self-locking rotating mechanism is provided with two input ends, a first hand wheel (7) is fixedly mounted at one input end of the self-locking rotating mechanism, the other input end of the self-locking rotating mechanism is connected with the output end of the speed increasing mechanism, and a second hand wheel (8) is fixedly mounted at the input end of the speed increasing mechanism;

the self-locking rotating mechanism is composed of a worm wheel (20), a worm (21), a first rotating shaft (12) and a second rotating shaft (22), the second rotating shaft (22) is rotatably installed on one side of the first shell (5), the first rotating shaft (12) is rotatably installed on the top of the first shell (5), one end of the second rotating shaft (22) is fixedly connected with one end of the worm (21), the bottom end of the first rotating shaft (12) is fixedly sleeved with the worm wheel (20), the worm (21) is meshed with the worm wheel (20), the end of the second rotating shaft (22) is connected with a first hand wheel (7), a pointer (13) is fixedly installed at the top end of the first rotating shaft (12), an annular scale (11) is marked at the top end of the first shell (5), and the bottom end of the first rotating shaft (12) is fixedly connected with the top end of the valve rod (27);

the locking mechanism is fixedly embedded on two sides of the valve body (1) and comprises a cylinder (16) and an electromagnet (17) fixedly mounted at one end of the cylinder (16), a movable core column (18) is connected inside the cylinder (16) in a matched mode, a connecting column (34) is fixedly mounted at one end of the movable core column (18), an iron block (35) is fixedly mounted at the tail end of the connecting column (34), a spring (36) is sleeved on the surface of the connecting column (34), the connecting column (34) is elastically connected with the inner wall of the cylinder (16) through the spring (36), and a power supply mechanism is fixedly mounted on the outer wall of the first shell (5);

first casing (5) top and second casing (6) top are fixed gomphosis respectively and are installed first refuel rubber buffer (9) and second and refuel rubber buffer (10).

2. An eccentric butterfly valve according to claim 1, characterized in that: the front and the back of the valve body (1) are fixedly welded with flange plates (2), and a plurality of mounting holes are uniformly formed around the flange plates (2).

3. An eccentric butterfly valve according to claim 1, characterized in that: bottom supporting mechanism fills sealing layer (31) by base (15), connecting rod (29), axle sleeve (30) and second and constitutes, base (15) fixed mounting is in the bottom of valve body (1), the top and valve rod (27) bottom rigid coupling of connecting rod (29), axle sleeve (30) cup joint with the bottom of connecting rod (29), and axle sleeve (30) gomphosis installs the inside at base (15), valve body (1) bottom is run through in connecting rod (29), and connecting rod (29) and valve body (1) junction fill second and fill sealing layer (31).

4. An eccentric butterfly valve according to claim 1, characterized in that: the speed increasing mechanism is composed of a third rotating shaft (23), a first bevel gear (24), a second bevel gear (25) and a fourth rotating shaft (26), the third rotating shaft (23) and the fourth rotating shaft (26) are respectively installed on one side of a first shell (5) and one side of a second shell (6) in a rotating mode, the third rotating shaft (23) is fixedly sleeved with the first bevel gear (24), the fourth rotating shaft (26) is fixedly sleeved with the second bevel gear (25), the first bevel gear (24) and the second bevel gear (25) are meshed, the fourth rotating shaft (26) is connected with a second hand wheel (8), one end of the third rotating shaft (23) is fixedly connected with one end of a worm (21), and the diameter of the second bevel gear (25) is three times that of the first bevel gear (24).

5. An eccentric butterfly valve according to claim 1, characterized in that: the spring (36) is positioned between the iron block (35) and the movable core column (18), one end of the spring (36) is fixedly connected with the surface of the connecting column (34), and the other end of the spring (36) is fixedly connected with the inner wall of the cylinder (16).

6. An eccentric butterfly valve according to claim 1, characterized in that: the diameter of the iron block (35) is the same as that of the movable core column (18), and the surface of the movable core column (18) is sleeved with a rubber sleeve.

7. An eccentric butterfly valve according to claim 1, characterized in that: the power supply mechanism is composed of a switch (33) and a battery (32), the battery (32) and the switch (33) are fixedly mounted on the first shell (5), and the battery (32) and the switch (33) are electrically connected with the electromagnet (17).

8. An eccentric butterfly valve according to claim 1, characterized in that: first refuel rubber buffer (9) and second refuel rubber buffer (10) and be cylinder type structure, and first refuel rubber buffer (9) middle part and second refuel rubber buffer (10) middle part and all opened pore (901).

9. An eccentric butterfly valve according to claim 1, characterized in that: the surface of the valve rod (27) is fixedly provided with a plurality of connecting blocks at equal intervals, and the connecting blocks are fixedly connected with the surface of the valve plate (14).

10. An eccentric butterfly valve according to claim 1, characterized in that: the first hand wheel (7) and the second hand wheel (8) are both composed of a circular ring and two connecting rods, and the two connecting rods are fixedly installed on the inner wall of the circular ring.