CN114688271B

CN114688271B - Electric actuator device for valve

Info

Publication number: CN114688271B
Application number: CN202210238377.5A
Authority: CN
Inventors: 寇福来; 康永红; 曲国龙; 王友彬
Original assignee: Confluence River Power Plant Of Hulunbuir Antai Thermal Power Co ltd
Current assignee: Confluence River Power Plant Of Hulunbuir Antai Thermal Power Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2023-06-23
Anticipated expiration: 2042-03-11
Also published as: CN114688271A

Abstract

The invention discloses an electric actuator device for a valve, which comprises a valve assembly, wherein the valve assembly comprises a valve body, the valve body is provided with a flow hole, the valve body is provided with a mounting hole, a mounting seat is arranged in the mounting hole, the mounting seat is provided with a penetrating mounting hole, a rotating shaft is arranged in the mounting hole, a valve plate is arranged on the rotating shaft, and the valve plate is positioned in the flow hole; the fixing assembly comprises a cylindrical fixing seat, and the fixing seat is fixedly connected with the mounting seat; the driving assembly comprises a motor, wherein the motor comprises an input shaft; the rotating assembly comprises a rotating seat fixedly connected with the input shaft, and the rotating seat is detachably connected with the fixed seat; the motor control is carried out through the driving component, and when the opening degree of the valve needs to be regulated, the rotating seat of the rotating component is connected with the rotating piece in the fixed seat; firstly, the rotating seat is connected with the fixed seat, then the motor drives the rotating piece, and further the rotating shaft is driven by a series of transmissions to control the deflection angle of the valve plate, so that the opening of the valve body is regulated.

Description

Electric actuator device for valve

Technical Field

The invention relates to the field of valves, in particular to an electric actuator device for a valve.

Background

The electric valve has larger action moment than the common valve, the switch action speed of the electric valve can be adjusted, the structure is simple, the maintenance is easy, and the electric valve can be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, slurry, oil, liquid metal, radioactive media and the like. The traditional pneumatic valve is not easy to damage due to clamping because of the buffer characteristic of the gas in the action process, but a gas source is needed, and a control system of the pneumatic valve is more complex than that of an electric valve. The valve electric actuator refers to a machine which uses electric energy as a main energy source and is used for driving a valve; however, the actuator and the valve are often linked in multiple stages, so that the response speed of the valve is slowed down, the response of the valve is delayed, and thus the valve system is easy to cause problems.

Disclosure of Invention

This section is intended to summarize some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, which may be simplified or omitted from the present section and description abstract and title of the application to avoid obscuring the objects of this section, description abstract and title, and which is not intended to limit the scope of this invention.

The present invention has been made in view of the above and/or problems occurring in the prior art.

Therefore, the technical problem to be solved by the invention is that the valve is very laborious to use on a larger torque valve, the manual hand-pulling rotation is very difficult, no specific tool is used for controlling the valve, and the operation of other people cannot be limited.

In order to solve the technical problems, the invention provides the following technical scheme: the electric actuator device for the valve comprises a valve assembly, wherein the valve assembly comprises a valve body, the valve body is provided with a flow hole, the valve body is provided with a mounting hole penetrating radially along the flow hole, a mounting seat is arranged in the mounting hole, the mounting seat is provided with a penetrating mounting hole, a rotating shaft is arranged in the mounting hole, a valve plate is arranged on the rotating shaft, and the valve plate is positioned in the flow hole;

the fixing assembly comprises a cylindrical fixing seat, and the fixing seat is fixedly connected with the mounting seat;

a drive assembly including a motor including an input shaft;

the rotating assembly comprises a rotating seat fixedly connected with the input shaft, and the rotating seat is detachably connected with the fixing seat.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the fixing base is provided with first cylindricality groove with the terminal surface that rotates the seat and be connected, and first cylindricality inslot rotates and is connected with the rotation piece, fixing base center still is provided with the second through-hole that runs through, the rotation piece is provided with the pivot that passes the second through-hole, pivot and axis of rotation fixed connection.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the rotary seat is characterized in that a first round groove is formed in one end of the rotary seat, a first long groove is formed in the bottom of the first round groove, two symmetrically arranged sliding blocks are connected to the first long groove, a second long groove is formed in the bottom of the first long groove, a limiting block is arranged at one end of the sliding block, located in the first long groove, embedded into the second long groove, a boss is formed in the end, away from the first long groove, of the sliding block, extending towards the center of the rotary seat, a first inclined surface is formed in the side face of the boss, and a second elastic piece is arranged between the sliding block and the end of the first long groove.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the periphery of the rotating piece is provided with a limit bulge, the inner side surface of the first cylindrical groove is provided with a limit ring groove matched with the limit bulge, one end of the rotating piece, which is close to the rotating seat, is connected with a clamping block, two side surfaces of the clamping block are provided with triangular bulges, the one side that the triangular bulge is close to the rotation piece is perpendicular to the fixture block side, the triangular bulge is provided with the second inclined plane, the one end that the fixture block is close to the rotation seat is provided with the third inclined plane, the third inclined plane is parallel with first inclined plane.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the triangular bulge is far away from the edge of the clamping block to form a round angle and is provided with a penetrating rotating hole, the triangular bulge and the clamping block are provided with grooves penetrating through the rotating hole, a first connecting rod is arranged in each groove, one end of the first connecting rod is coaxially hinged with the rotating hole and is tangential to the second inclined plane, and the other end of the first connecting rod is hinged with the second connecting rod.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the novel rotary clamping device is characterized in that two penetrating first through holes are uniformly formed in the rotary piece, a second cylindrical groove is formed in the first through holes, a movable block is slidably arranged in the second cylindrical groove, a hinge seat is arranged at one end, close to the clamping block, of the movable block, the hinge seat is hinged to one end of the second connecting rod, a spring is arranged between the other end face of the movable block and the end face of the second cylindrical groove, a first annular groove is formed in the end face of the first cylindrical groove, an annular ring is arranged in the first annular groove, a second annular groove is formed in the end face, close to the spring, of the annular ring, a third annular groove is formed in the end face of the second annular groove, an adjusting rod is connected with an adjusting rod, penetrates through the first through hole, the first annular groove and is embedded into the third annular groove, and one end, located in the third annular groove, of the adjusting rod is provided with a limiting ball.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the outer portion of the fixing seat is provided with a third long groove penetrating through the first annular groove, the annular ring is provided with an adjusting pin, and the adjusting pin penetrates through the third long groove.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the fixing seat is provided with a deep groove along the periphery, a rotating cylinder is arranged in the deep groove, the inner side surface of the rotating cylinder is provided with a spiral groove, and the end part of the adjusting pin is embedded into the spiral groove.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: the one end that the fixing base is connected with the rotation seat sets up by annular coupling shell, the one end that the rotation seat set up the slider can imbed in the annular coupling shell.

As a preferable embodiment of the electric actuator device for a valve according to the present invention, wherein: when the sliding block is clamped with the clamping block, the end part of the clamping block is embedded into the first long groove.

The invention has the beneficial effects that: the motor control is carried out through the driving component, and when the opening degree of the valve needs to be regulated, the rotating seat of the rotating component is connected with the rotating piece in the fixed seat; firstly, the rotating seat is connected with the fixed seat, then the motor drives the rotating piece, and further the rotating shaft is driven by a series of transmissions to control the deflection angle of the valve plate, so that the opening of the valve body is regulated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of a valve assembly in an electric actuator apparatus for a valve according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a valve assembly connected to a fixed assembly, a driving assembly, and a rotating assembly in an electric actuator device for a valve according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a valve assembly in an electric actuator apparatus for a valve according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a valve assembly connecting and fixing assembly in an electric actuator apparatus for a valve according to an embodiment of the present invention;

FIG. 5 is a schematic view of the enlarged partial structure of FIG. 4 in an electric actuator device for a valve according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a fixing component of an electric actuator device for a valve according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a rotary component of an electric actuator device for a valve according to an embodiment of the present invention;

FIG. 8 is a schematic view of an exploded view of a stationary assembly of an electric actuator device for a valve according to an embodiment of the present invention;

FIG. 9 is a schematic view of a connection between a fixed component and a rotating component in an electric actuator device for a valve according to an embodiment of the present invention;

fig. 10 is a schematic cross-sectional view illustrating a process of separating a fixed component from a rotating component in an electric actuator device for a valve according to an embodiment of the present invention.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the invention is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 5, the present embodiment provides an electric actuator device for a valve, comprising a valve assembly 100 including a valve body 101, the valve body 101 being cylindrical, the valve body 101 being provided with a flow hole 101a for facilitating the passage of fluid; the valve body 101 is provided with the mounting hole 101b that radially runs through along the circulation hole 101a, be provided with mount pad 102 in the mounting hole 101b, mount pad 102 adopts welded connection with mounting hole 101b, mount pad 102 is provided with the mounting hole 102a that runs through, be provided with axis of rotation 103 in the mounting hole 102a, axis of rotation 103 can rotate in mounting hole 102a, and carry out sealing treatment, install valve block 104 on the axis of rotation 103, valve block 104 is the disc, valve block 104 is located the circulation hole 101a, consequently, the deflection angle of valve block 104 is controlled through operating axis of rotation 103, and then the aperture of valve body is adjusted.

Further, the fixing assembly 200 includes a cylindrical fixing seat 201, and the fixing seat 201 is fixedly connected with the mounting seat 102 in a welding or flange connection manner.

The valve further comprises a driving assembly 300 and a rotating assembly 400, which are mainly used for driving the valve body, and comprise a motor 301, wherein the motor 301 comprises an input shaft 302; the motor 301 may be a micro motor or steering engine. The rotary assembly 400 includes a rotary holder 401 fixedly coupled to the input shaft 302, the rotary holder 401 being detachably coupled to the fixed holder 201.

Further, a first cylindrical groove 201a is provided at an end surface of the fixing base 201 connected with the rotating base 401, a rotating member 202 is rotatably connected in the first cylindrical groove 201a, the rotating member 202 can rotate in the first cylindrical groove 201a, a second through hole 201f penetrating through is further provided in the center of the fixing base 201, a rotating shaft 202j penetrating through the second through hole 201f is provided on the rotating member 202, and the rotating shaft 202j is fixedly connected with the rotating shaft 103, so that the rotation of the rotating member 202 is controlled, and the rotation of the rotating shaft 103 can be controlled.

In this embodiment, the driving assembly 300 is used for electric control, and when the opening degree of the valve needs to be adjusted, the rotating seat 401 of the rotating assembly 400 is connected with the rotating member 202 in the fixed seat 201.

Example 2

Referring to fig. 1 to 10, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that:

one end of the rotating seat 401 is provided with a first round groove 401a, the first round groove 401a is cylindrical and coaxial with the cylinder 107, the bottom of the first round groove 401a is provided with a first long groove 401b, the first long groove 401b is radially arranged, the first long groove 401b is connected with two symmetrically arranged sliding blocks 402, the sliding blocks 402 can slide in the first long groove 401b and are opposite in direction, the bottom of the first long groove 401b is provided with a second long groove 401c, one end of the sliding blocks 402, which is positioned in the first long groove 401b, is provided with a limiting block 402a, the limiting block 402a is embedded in the second long groove 401c, and the matching of the two limiting blocks can limit the freedom degree of the sliding blocks 402, so that the sliding blocks can only slide in the first long groove 401b in the radial direction.

One end of the limiting block 402a, which is far away from the first long groove 401b, extends towards the center of the rotating seat 401 to form a boss 402b, the cross section of the boss 402b is a right triangle, a first inclined surface 402c is formed on the side surface of the boss 402b, a second elastic piece 403 is arranged between the sliding block 402 and the end of the first long groove 401b, and the second elastic piece 403 is a pressure spring. The spring brings the two sliders 402 closer together.

Further, a first cylindrical groove 201a is formed in one end surface, connected with the rotating seat 401, of the fixing seat 201, a rotating piece 202 is rotatably connected in the first cylindrical groove 201a, the rotating piece 202 can rotate in the first cylindrical groove 201a, a limiting protrusion 202a is arranged on the periphery of the rotating piece 202, a limiting ring groove 201b matched with the limiting protrusion 202a is formed in the inner side surface of the first cylindrical groove 201a, and axial deviation of the rotating piece 202 is limited through cooperation of the first cylindrical groove 201a and the limiting ring groove 201 b.

The rotating member 202 is connected with the clamping block 202b near one end of the rotating seat 401, triangular protrusions 202c are arranged on two side surfaces of the clamping block 202b, the cross section of the triangular protrusions 202c is a right triangle, one surface of the triangular protrusions 202c near the rotating member 202 is perpendicular to the side surface of the clamping block 202b, second inclined surfaces 202d are arranged on the triangular protrusions 202c, a third inclined surface 202e is arranged at one end of the clamping block 202b near the rotating seat 401, and the third inclined surface 202e is parallel to the first inclined surface 402c, so that when the fixing seat 201 is closely connected with the rotating seat 401, the first inclined surfaces 402c of the two bosses 402b sequentially pass through the third inclined surfaces 202e and the second inclined surfaces 202d to enable the bosses 402b to form clamping connection with the triangular protrusions 202c.

Further, the edge of the triangular protrusion 202c away from the fixture block 202b forms a round angle and is provided with a through rotating hole 202f, that is, the outer edge of the triangular protrusion 202c is arc-shaped, the triangular protrusion 202c and the fixture block 202b are provided with a groove 202g penetrating through the rotating hole 202f, a first connecting rod 203 is arranged in the groove 202g, one end of the first connecting rod 203 is coaxially hinged with the rotating hole 202f and tangential to a second inclined plane 202d, the hinging mode can be pin shaft connection, the first connecting rod 203 can rotate by taking the rotating hole 202f as the center of a circle, and the other end of the first connecting rod 203 is hinged with a second connecting rod 204. The second link 204 can rotate with the end of the first link 203, so when the second link 204 is operated to pull the first link 203 to be in the same straight line and perpendicular to the end surface of the rotating seat 401, the rotation of the first link 203 pushes the boss 402b to be separated from the triangular boss 202c.

Further, two through first through holes 202h are uniformly formed in the rotating member 202, and the positions of the first through holes 202h should be as follows: when the first connecting rod 203 and the second connecting rod 204 are perpendicular to the end face of the rotating member 202, the center line of the first connecting rod coincides with the axis of the first through hole 202 h. The first through hole 202h is internally provided with a second slot 202i, the diameter of the second slot 202i is larger than that of the first through hole 202h, a moving block 205 is slidably arranged in the second slot 202i, the moving block 205 can axially move in the second slot 202i, one end of the moving block 205, which is close to the clamping block 202b, is provided with a hinge seat 205b, and the hinge seat 205b is hinged with one end of the second connecting rod 204, so that when the moving block 205 is operated to move away from the rotating seat 401 in the second slot 202i, the first connecting rod 203 can be driven to rotate 90 degrees through the matching relationship between the hinge seat 205b and the second connecting rod 204, and the boss 402b is pushed to be separated from the triangular boss 202c.

Preferably, a spring 206 is disposed between the other end surface of the moving block 205 and the end surface of the second cylinder 202i, and the spring 206 is a pressure spring, so that the spring 206 can push the moving block 205 to reset the first link 203 and the second link 204. It should be noted that, the end of the first through hole 202h near the clamping block 202b may be adapted to be provided with a avoidance slot, so as to provide a movable space of the second connecting rod 204.

Further, the end face of the first cylindrical groove 201a is provided with a first annular groove 201c, the first annular groove 201c is located at the bottom of the first cylindrical groove 201a, an annular ring 207 is arranged in the first annular groove 201c, the annular ring 207 can move in the first annular groove 201c in the axial direction, the end face, close to the spring 206, of the annular ring 207 is provided with a second annular groove 207a, the end face of the second annular groove 207a is provided with a third annular groove 207b, the width of the third annular groove 207b is larger than that of the second annular groove 207a, therefore the cross sections of the second annular groove 207a and the third annular groove 207b form a T shape, the moving block 205 is connected with an adjusting rod 205a, the adjusting rod 205a penetrates through the first through hole 202h and the first annular groove 201c and is embedded into the third annular groove 207b, and one end, located in the third annular groove 207b, of the adjusting rod 205a is provided with a limiting ball 205c. The diameter of the limit ball 205c is greater than the width of the second annular groove 207a and tangential to the side of the third annular groove 207 b. The annular ring 207 can be operated to move the moving block 205.

The fixing base 201 is provided with a third long groove 201d penetrating to the first annular groove 201c, the third long groove 201d extends in the axial direction, the annular ring 207 is provided with an adjusting pin 207c, and the adjusting pin 207c passes through the third long groove 201d. The fixing seat 201 is provided with a deep groove 201e along the periphery, the outer diameter of the deep groove 201e is smaller than that of the fixing seat 201, a rotating cylinder 208 is arranged in the deep groove 201e, the rotating cylinder 208 can rotate and cannot axially deviate, the inner side surface of the rotating cylinder 208 is provided with a spiral groove 208a, the trend of the spiral groove 208a extends along a spiral line, and the end part of the adjusting pin 207c is embedded into the spiral groove 208a, so that when the rotating cylinder 208 is rotated, the annular ring 207 can be operated to move, and the action of the first connecting rod 203 is driven.

The center of the fixing seat 201 is further provided with a second through hole 201f, and the rotating member 202 is provided with a rotating shaft 202j passing through the second through hole 201f, and the rotating shaft 202j is driven by the motor 400, so that when the fixing assembly 200 and the rotating assembly 400 are connected, the rotating member 202 can be driven to rotate by the motor.

Preferably, the end of the fixed seat 201 connected with the rotating seat 401 is provided with an annular connecting shell 209, and the end of the rotating seat 401 provided with the sliding block 402 can be embedded into the annular connecting shell 209.

It should be noted that, when the slider 402 is engaged with the latch 202b, the end of the latch 202b is embedded in the first elongated slot 401b, and the width of the latch 202b is consistent with the width of the first elongated slot 401b, so as to facilitate driving the rotation of the rotation assembly 400.

In this embodiment, the rotary seat 401 is first connected to the fixed seat 201, and then the motor 301 drives the rotary member 202, and the rotary shaft 103 is further driven by a series of transmissions to control the deflection angle of the valve plate 104, so as to adjust the opening of the valve body.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.

Claims

1. An electric actuator device for a valve, characterized in that: comprising the steps of (a) a step of,

valve assembly (100), including valve body (101), valve body (101) are provided with flow hole (101 a), valve body (101) are provided with along flow hole (101 a) radial first mounting hole (101 b) that runs through, be provided with mount pad (102) in first mounting hole (101 b), mount pad (102) are provided with second mounting hole (102 a) that runs through, be provided with axis of rotation (103) in second mounting hole (102 a), install valve block (104) on axis of rotation (103), valve block (104) are located flow hole (101 a);

the fixing assembly (200) comprises a cylindrical fixing seat (201), and the fixing seat (201) is fixedly connected with the mounting seat (102);

a drive assembly (300) comprising a motor (301), the motor (301) comprising an input shaft (302);

the rotating assembly (400) comprises a rotating seat (401) fixedly connected with the input shaft (302), and the rotating seat (401) is detachably connected with the fixed seat (201);

a first cylindrical groove (201 a) is formed in one end face, connected with the rotating seat (401), of the fixed seat (201), a rotating piece (202) is connected in a rotating mode in the first cylindrical groove (201 a), a second through hole (201 f) penetrating through the center of the fixed seat (201) is further formed in the center of the fixed seat, a rotating shaft (202 j) penetrating through the second through hole (201 f) is arranged on the rotating piece (202), and the rotating shaft (202 j) is fixedly connected with the rotating shaft (103);

a first round groove (401 a) is formed in one end of the rotating seat (401), a first long groove (401 b) is formed in the bottom of the first round groove (401 a), two symmetrically-arranged sliding blocks (402) are connected to the first long groove (401 b), a second long groove (401 c) is formed in the bottom of the first long groove (401 b), a limiting block (402 a) is arranged at one end of the sliding block (402) located in the first long groove (401 b), the limiting block (402 a) is embedded in the second long groove (401 c), a boss (402 b) is formed in the end, away from the first long groove (401 b), of the sliding block (402) in an extending mode towards the center of the rotating seat (401), a first inclined surface (402 c) is formed in the side face of the boss (402 b), and a second elastic piece (403) is arranged between the sliding block (402) and the end of the first long groove (401 b).

The utility model discloses a rotary table, including rotary table, clamping block (202 b), cam, clamping block (202 c), cam (202 d) are provided with spacing arch (202 a) periphery, first cylindrical groove (201 a) medial surface be provided with spacing protruding (202 a) complex spacing annular (201 b), rotary table (202) are close to the one end of rotating seat (401) and are connected with clamping block (202 b), the both sides face of clamping block (202 b) is provided with cam (202 c), the one side perpendicular to clamping block (202 b) side that cam (202 c) is close to rotary table (202), cam (202 c) are provided with second inclined plane (202 d), clamping block (202 b) are close to the one end of rotating seat (401) and are provided with third inclined plane (202 e), third inclined plane (202 e) are parallel with first inclined plane (402 c).

2. The electric actuator device for a valve according to claim 1, wherein: the triangular bulge (202 c) is far away from the edge of the clamping block (202 b) to form a round angle and is provided with a penetrating rotating hole (202 f), the triangular bulge (202 c) and the clamping block (202 b) are provided with a groove (202 g) penetrating the rotating hole (202 f), a first connecting rod (203) is arranged in the groove (202 g), one end of the first connecting rod (203) is coaxially hinged with the rotating hole (202 f) and is tangential to a second inclined plane (202 d), and the other end of the first connecting rod (203) is hinged with a second connecting rod (204).

3. The electric actuator device for a valve according to claim 2, wherein: the novel ball limiting device is characterized in that two penetrating first through holes (202 h) are uniformly formed in the rotating piece (202), a second annular groove (202 i) is formed in the first through holes (202 h), a moving block (205) is arranged in the second annular groove (202 i), a hinge seat (205 b) is arranged at one end, close to the clamping block (202 b), of the moving block (205), one end of the hinge seat (205 b) is hinged with one end of the second connecting rod (204), a spring (206) is arranged between the other end face of the moving block (205) and the end face of the second annular groove (202 i), a first annular groove (201 c) is formed in the end face of the first cylindrical groove (201 a), an annular ring (207) is arranged in the first annular groove (201 c), a second annular groove (207 a) is arranged on the end face, close to the spring (206), a third annular groove (207 b) is arranged on the end face of the second annular groove (207 a), the moving block (205) is connected with an adjusting rod (205 a), the adjusting rod (205 a) penetrates through the first through holes (202 h), the first annular groove (205 c) and is embedded into the third annular groove (207 b) and is arranged in the third annular groove (207 b).

4. The electric actuator device for a valve according to claim 3, wherein: the fixing seat (201) is externally provided with a third long groove (201 d) penetrating to the first annular groove (201 c), the annular ring (207) is provided with an adjusting pin (207 c), and the adjusting pin (207 c) penetrates through the third long groove (201 d).

5. The electric actuator device for a valve according to claim 4, wherein: the fixing seat (201) is provided with a deep groove (201 e) along the periphery, a rotating cylinder (208) is arranged in the deep groove (201 e), a spiral groove (208 a) is formed in the inner side surface of the rotating cylinder (208), and the end part of the adjusting pin (207 c) is embedded into the spiral groove (208 a).

6. The electric actuator device for a valve according to claim 5, wherein: one end of the fixed seat (201) connected with the rotating seat (401) is provided with an annular connecting shell (209), and one end of the rotating seat (401) provided with a sliding block (402) can be embedded into the annular connecting shell (209).

7. The electric actuator device for a valve according to claim 6, wherein: when the sliding block (402) is clamped with the clamping block (202 b), the end part of the clamping block (202 b) is embedded into the first long groove (401 b).