CN215370686U

CN215370686U - Valve actuator with adjustable torque limit

Info

Publication number: CN215370686U
Application number: CN202121682789.5U
Authority: CN
Inventors: 靳义坤
Original assignee: Changzhou Chenglei Valve Technology Co ltd
Current assignee: Changzhou Chenglei Valve Technology Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-12-31
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses a valve actuator with adjustable torque limit, and belongs to the technical field of valve actuators. The clutch device mainly comprises a driving part which is rotatably connected to a box body, a meshing part which can slide and is non-rotatably installed on the driving part, a bolt, a limiting part and an elastic part, wherein a clutch groove is formed in the end part of the outer end of an output shaft, the clutch groove is gradually enlarged from inside to outside, a connecting part is arranged at one end, extending to the outer side of the box body, of the driving part, the meshing part is located at the outer end position of the output shaft, a clutch claw which is matched with the clutch groove in shape on the output shaft is arranged at one end, close to the output shaft, of the meshing part, the bolt penetrates through the meshing part and is fixedly connected to the output shaft, the limiting part is located at the outer end position of the meshing part, the limiting part is in threaded fit with the bolt, the elastic part is in a compressed state and abutted against the position between the meshing part and the limiting part, and therefore the clutch claw is contained in the clutch groove. The valve actuator with the adjustable torque limit is convenient for adjusting the torque limit and improves the user experience.

Description

Valve actuator with adjustable torque limit

Technical Field

The utility model relates to the technical field of valve actuators, in particular to a valve actuator with adjustable torque limit.

Background

Actuators are used in the field of fluid control, specifically for controlling valves in a fluid circuit. In order to prevent the executor to transship when using, be provided with moment of torsion limit structure among some valve executors, the patent number is: chinese patent No. cn201110078000.x provides a valve actuator with an adjustable overload clutch, which adapts the maximum torque that can be transmitted by the overload clutch to the respective requirements by means of a replacement spring element. However, this technique is cumbersome to adjust the magnitude of the torque limit.

It is therefore desirable to provide a valve actuator with adjustable torque limits to address the above problems.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the valve actuator with the adjustable torque limit is provided, the size of the torque limit can be conveniently adjusted, and the user experience is improved.

The technical scheme adopted by the utility model for solving the technical problems is as follows: an adjustable torque-limiting valve actuator includes a housing having an output shaft therein for outputting torque; the valve actuator with adjustable torque limit further comprises a driving part rotatably connected to the box body, a meshing part slidably and non-rotatably mounted on the driving part, a bolt, a limiting part and an elastic part, wherein an engaging groove is formed in the end part of the outer end of the output shaft, the engaging groove is gradually enlarged from inside to outside, a connecting part used for being connected with the driven part is arranged at one end, extending to the outer side of the box body, of the driving part, the meshing part is located at the outer end position of the output shaft, a clutch claw which is matched with the shape of the clutch groove in the output shaft is arranged at one end, close to the output shaft, of the meshing part, the bolt penetrates through the meshing part and is fixedly connected to the output shaft, the limiting part is located at the outer end position of the meshing part, the limiting part is in threaded fit with the bolt, and the elastic part is pressed and abutted between the meshing part and the limiting part, so that the clutch claw is accommodated in the clutch groove.

Further, the driving piece is cylindric structure, the outer face of cylinder of driving piece rotates to be connected on the box, the driving piece with the coaxial setting of output shaft.

Further, the connecting part is a clutch claw.

Furthermore, at least one sliding groove is formed in the inner cylindrical surface of the driving piece along the axial direction of the driving piece, a matched sliding block is arranged on the outer cylindrical surface of the meshing piece corresponding to the sliding groove in the driving piece, the meshing piece is contained in the driving piece, and the sliding block is slidably installed in the sliding groove.

Furthermore, the center of the meshing part is provided with an avoidance hole corresponding to the bolt, and the bolt penetrates through the avoidance hole in the meshing part and is fixedly connected to the output shaft.

Furthermore, the bolt is provided with an external thread corresponding to the limiting part, and the limiting part is a nut matched with the bolt.

Furthermore, the elastic piece is a dish-shaped elastic piece.

The utility model has the beneficial effects that: the valve actuator with adjustable torque limit comprises a driving piece rotatably connected to a box body and an engaging piece slidably and non-rotatably mounted on the driving piece, wherein a clutch groove is formed in the end part of the outer end of an output shaft, a clutch claw matched with the shape of the clutch groove in the output shaft is arranged at one end, close to the output shaft, of the engaging piece, a bolt penetrates through the engaging piece and is fixedly connected to the output shaft, a limiting piece is located at the outer end of the engaging piece, the limiting piece is in threaded fit with a bolt, an elastic piece is pressed and connected between the engaging piece and the limiting piece in a compressed state, and therefore the clutch claw is contained in the clutch groove.

Drawings

The utility model is further illustrated by the following figures and examples.

In the figure: FIG. 1 is a perspective view of an adjustable torque limiting valve actuator according to the present invention;

FIG. 2 is a longitudinal cross-sectional view of the adjustable torque-limiting valve actuator shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of an output shaft of the adjustable torque-limiting valve actuator of the present invention;

FIG. 4 is a schematic diagram of a driver of the adjustable torque limit valve actuator of the present invention;

FIG. 5 is a schematic structural diagram of an engagement member of the adjustable torque limiting valve actuator of the present invention;

FIG. 6 is a schematic diagram of a retainer for an adjustable torque limiting valve actuator according to the present invention;

FIG. 7 is a longitudinal cross-sectional view of the adjustable torque limit valve actuator shown in FIG. 1 and illustrating the adjustable torque limit valve actuator in an overload condition.

100. A box body; 110. an output shaft; 111. a clutch groove; 1111. a separation-tending inclined wall; 200. a drive member; 210. a connecting portion; 300. an engaging member; 310. a clutch pawl; 311. meeting the wall; 320. a propping surface; 330. a cutting knife; 340. a slider; 400. bolting; 500. a limiting member; 600. an elastic member; 700. a holder; 710. a mating surface.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1, the present invention provides an adjustable torque-limiting valve actuator, which includes a housing 100 and a driving member 200, wherein the driving member 200 is used to connect to a driven member (e.g., a valve stem of a valve) to control the valve action by the adjustable torque-limiting valve actuator of the present invention.

Referring to fig. 2, the adjustable torque limit valve actuator further includes an engaging member 300, a bolt 400, a limiting member 500, and an elastic member 600.

Referring to fig. 2, an output shaft 110 for outputting torque is rotatably connected to the case 100, and referring to fig. 3, at least one clutch groove 111 is formed in an end portion of an outer end of the output shaft 110, and the clutch groove 111 is gradually enlarged from inside to outside, so that two side walls of the clutch groove 111 respectively have a separation-tending inclined wall 1111; in the present embodiment, only three clutch grooves 111 are provided, and the three clutch grooves 111 are uniformly distributed in the circumferential direction of the output shaft 110.

The driving member 200 is a cylindrical structure, as shown in fig. 2, an outer cylindrical surface of the driving member 200 is rotatably connected to the box 100, the driving member 200 is coaxially disposed with the output shaft 110, and a connecting portion 210 is disposed at one end of the driving member 200 extending to the outside of the box 100, the connecting portion 210 is used for being connected to a driven member in a matching manner.

Referring to fig. 4, in addition, at least one sliding groove 220 is formed on the inner sidewall of the driving member 200 in the axial direction of the driving member 200.

The engaging member 300 is located at the outer end of the output shaft 110, as shown in fig. 5, the engaging member 300 is substantially a circular truncated cone-shaped structure, one end of the engaging member 300 close to the output shaft 110 is integrally provided with at least one clutch pawl 310, and the clutch pawls 310 are adapted to the shape of the clutch slot 111 on the output shaft 110, so that two sides of the clutch pawls 310 are respectively provided with an engaging wall 311 corresponding to the approaching inclined wall 1111; the outer cylindrical surface of the engaging member 300 is provided with a matched sliding block 340 corresponding to the sliding groove 220 on the driving member 200, the engaging member 300 is accommodated in the driving member 200, the sliding block 340 is slidably arranged in the sliding groove 220, so that the engaging member 300 is connected to the driving member 200 in a sliding and non-rotatable manner, the clutch claw 310 on the engaging member 300 is accommodated in the clutch groove 111 on the output shaft 110, the inclined approaching and separating wall 1111 in the clutch groove 111 abuts against the engaging wall 311 on the clutch claw 310, so that when the clutch claw 310 is accommodated in the clutch groove 111, the engaging member 300 can be circumferentially limited on the output shaft 110, and the output shaft 110 can transmit torque to the driving member 200 through the engaging member 300.

In addition, the center of the engaging member 300 has a relief hole (not marked) corresponding to the pin 400.

In order to support the engaging member 300 against the output shaft 110, the bolt 400 is fixedly connected to the output shaft 110 through the avoiding hole of the engaging member 300, and the limiting member 500 is mounted on the bolt 400 and located at the outer end of the engaging member 300.

In a specific embodiment, the elastic member 600 is pressed between the engaging member 300 and the limiting member 500, so that the engaging member 300 is pushed toward the output shaft 110 by the elastic force of the elastic member 600, and the engaging claw 310 on the engaging member 300 is elastically pressed against the engaging groove 111 on the output shaft 110.

In this embodiment, the elastic member 600 is a disk-shaped elastic sheet.

In a specific embodiment, the limiting member 500 is in threaded engagement with the bolt 400, so that rotating the limiting member 500 can move the limiting member 500 on the bolt 400 along the axial direction of the output shaft 110 to adjust the distance between the limiting member 600 and the engaging member 300, and by adjusting the distance between the limiting member 600 and the engaging member 300, the elastic member 600 generates different deformation amounts, thereby achieving the purpose of adjusting the elastic force of the elastic member 600. It can be understood that a threaded hole (not shown) is disposed on the limiting member 500 along a radial direction of the limiting member 500, and a screw (not shown) is disposed on the limiting member 500 corresponding to the threaded hole, so that after the position of the limiting member 500 is adjusted, the limiting member 500 can be positioned on the bolt 400 by rotating the screw, and the limiting member 500 is prevented from loosening.

In this embodiment, the bolt 400 has an external thread corresponding to the limiting member 500, and the limiting member 500 is a nut matched with the bolt 400.

By combining the technical scheme, when the valve actuator with adjustable torque limit is used, the elastic force of the elastic member 600 is adjusted by adjusting the limiting member 500, when the driving member 200 is connected with the valve rod of the valve, if the output torque of the output shaft 110 reaches the set limiting value, the elastic force of the elastic member 600 cannot support the clutch pawl 310 on the engaging member 300 to be in fit connection with the clutch groove 111 on the output shaft 110, and the engaging wall 311 on one side of the clutch pawl 310 corresponding to the rotation direction moves relatively along the disengaging inclined wall 1111 on the clutch groove 111 until the clutch pawl 310 is disengaged from the clutch groove 111, so that the torque transmission between the driving member 200 and the output shaft 110 is disconnected, and the valve actuator with adjustable torque limit plays a role in overload protection.

It can be understood that when the torque limit of the torque-limiting adjustable valve actuator needs to be adjusted, the limit value of the torque can be conveniently adjusted only by moving the limiting member 500 on the pin 400 to adjust the magnitude of the elastic force of the elastic member 600.

Referring to fig. 5, in a specific embodiment, an end of the engaging member 300 away from the output shaft 110 is provided with a holding surface 320 along a circumferential direction of the engaging member 300, the holding surface 320 gradually shrinks from the engaging member 300 to an inner side of the engaging member 300 in a direction away from the clutch pawl 310, and a cutting knife 330 is protruded from the engaging member 300 at a position of the holding surface 320, and more precisely, a cutting edge of the cutting knife 330 faces away from the engaging member 300.

In the present embodiment, two cutting blades 330 are symmetrically provided.

Referring to fig. 6, the torque-limiting adjustable valve actuator further includes a retaining member 700 having a ring structure, the retaining member 700 is configured to be pressed by the engaging member 300 when the output shaft 110 is overloaded, so that the retaining member 700 falls off, one end of the retaining member 700 is provided with a matching surface 710 abutting against the abutting surface 320 of the driving member 200, the matching surface 710 has a shape corresponding to the shape of the abutting surface 320, a notch 720 having a shape corresponding to the shape of the cutting blade 330 is formed in the position of the matching surface 710 on the retaining member 700, and the cutting blade 330 is accommodated in the notch 720; referring to fig. 2, the retaining member 700 is installed between the engaging member 300 and the elastic member 600, the mating surface 710 on the retaining member 700 is abutted against the abutting surface 320 on the engaging member 300, the cutting knife 300 on the engaging member 300 is accommodated in the notch 720 of the retaining member 700, and one end of the retaining member 700 away from the engaging member 700 abuts against the limiting member 500.

In this embodiment, two notches 720 of the holder 700 are provided corresponding to the cutting blades 330 of the engaging member 300.

Therefore, when the output shaft 110 is overloaded, because the inclined wall 1111 of the clutch groove 111 on the output shaft 110 and the meeting wall 311 of the clutch claw 310 on the engaging member 300 have a holding force therebetween, and the holding force has a component force in the axial direction of the output shaft 110 exceeding a set value so as to push the engaging member 300 to move away from the output shaft 110, during the movement of the engaging member 300, the retaining member 700 is pressed to be compressed and deformed first, and because of the engagement of the mating surface 710 and the holding surface 320, the retaining member 700 will slide along the holding surface 320 on the engaging member 300 to the outside of the engaging member 300, and along with the stress concentration of the cutting knife 330 on the engaging member 300 on the notch 720 on the retaining member 700 on the notch 730, the position on the retaining member 700 along the notch 720 will be broken, the broken retaining member 700 will fall off from between the engaging member 300 and the limiting member 500, as shown in reference to fig. 7, because the retaining member 700 falls off, the distance between the engaging member 300 and the limiting member 500 is increased, and at this time, the clutch pawl 310 on the engaging member 300 will always be separated from the clutch groove 111 on the output shaft 110, so as to avoid damage caused by repeated collision between the engaging member 300 and the output shaft 110.

In addition, it is understood that one of the elastic member 600 and the holder 700 may be selected to be retained; that is, when the elastic member 600 is omitted, one end of the retaining member 700 away from the engaging member 300 abuts against the limiting member 500, and when the retaining member 700 is omitted, one end of the elastic member 600 away from the limiting member 500 abuts against the engaging member 300.

In light of the foregoing description of preferred embodiments in accordance with the utility model, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An adjustable torque-limiting valve actuator comprising a housing having an output shaft therein for outputting torque, wherein: the valve actuator with adjustable torque limit further comprises a driving part rotatably connected to the box body, a meshing part slidably and non-rotatably mounted on the driving part, a bolt, a limiting part and an elastic part, wherein an engaging groove is formed in the end part of the outer end of the output shaft, the engaging groove is gradually enlarged from inside to outside, a connecting part used for being connected with the driven part is arranged at one end, extending to the outer side of the box body, of the driving part, the meshing part is located at the outer end position of the output shaft, a clutch claw which is matched with the shape of the clutch groove in the output shaft is arranged at one end, close to the output shaft, of the meshing part, the bolt penetrates through the meshing part and is fixedly connected to the output shaft, the limiting part is located at the outer end position of the meshing part, the limiting part is in threaded fit with the bolt, and the elastic part is pressed and abutted between the meshing part and the limiting part, so that the clutch claw is accommodated in the clutch groove.

2. The adjustable torque limit valve actuator of claim 1, wherein: the driving piece is cylindric structure, the outer face of cylinder of driving piece rotates to be connected on the box, the driving piece with the coaxial setting of output shaft.

3. The adjustable torque limit valve actuator of claim 1, wherein: the connecting part is a clutch claw.

4. The adjustable torque limit valve actuator of claim 2, wherein: at least one sliding groove is formed in the inner cylindrical surface of the driving piece along the axial direction of the driving piece, a matched sliding block is arranged on the outer cylindrical surface of the meshing piece corresponding to the sliding groove in the driving piece, the meshing piece is contained in the driving piece, and the sliding block is slidably installed in the sliding groove.

5. The adjustable torque limit valve actuator of claim 1, wherein: the center of the meshing piece is provided with an avoidance hole corresponding to the bolt, and the bolt penetrates through the avoidance hole in the meshing piece and is fixedly connected to the output shaft.

6. The adjustable torque limit valve actuator of claim 1, wherein: the bolt is provided with an external thread corresponding to the limiting part, and the limiting part is a nut matched with the bolt.

7. The adjustable torque limit valve actuator of claim 1, wherein: the elastic piece is a dish-shaped elastic piece.