Transmission device connected with valve screw

Abstract

The utility model discloses a transmission device connected with a valve screw, which comprises an inertia transmission claw and a driven claw body matched with the inertia transmission claw, an electric device and a valve are in transmission through the inertia transmission claw, the inertia transmission claw can be made of metal materials, the inertia transmission claw structurally comprises a turbine head, a limit ring and a claw tail, and the inertia transmission claw is of a hollow structure. And the limiting ring is mounted in the limiting groove, so that stable rotation of the inertia transmission claw is ensured. By means of the transmission device, the valve can be tightly closed and opened, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model relates to a transmission device for valves, and more particularly to a transmission device connected to a valve screw. Background Technology

[0002] The transmission claw plays a very important role in valve operation. It is mainly responsible for transmitting the rotational motion of the power unit (such as motor, turbine head, etc.) to the valve's actuator (such as valve stem, valve core, etc.), thereby realizing the valve's opening, closing or regulating functions.

[0003] Currently, the electric actuator and valve are driven by a transmission claw. When the valve is closed, to ensure a tight seal, there is generally a certain amount of tension between the door panel and the valve body. Due to this tension, coupled with the increased pressure difference across the door panel after the valve is closed, and the possibility of impurities in the medium flowing through the valve, the valve may jam, making it difficult to open, or even causing the motor to stall and burn out.

[0004] In view of the above problems, this application aims to develop an inertial transmission claw, which is beneficial for valves to be closed tightly and opened easily, and to extend the service life of motors. Utility Model Content

[0005] The technical problem to be solved by this application is that in the prior art, the transmission between the transmission claw and the valve may cause the valve to jam due to the tight force between the door panel and the door body, making it difficult to open, or even causing the motor to stall and burn out.

[0006] To solve the above-mentioned technical problems, this application provides a transmission device connected to a valve screw, comprising: an inertial transmission claw, the main body of which is a cylindrical body open at both ends, a turbine head provided at one end of the cylindrical body, the turbine head meshing with a worm gear, and a motor connected to the worm gear; a claw tail provided at the other end of the cylindrical body, the claw tail being matched and connected to the valve screw; a limiting ring also provided near the claw tail end of the cylindrical body, a limiting disk fixed on the motor, the limiting disk being provided with a limiting groove adapted to the limiting ring; a passive claw body, the center of which passes through and is fixed to the valve screw, the passive claw body being matched and connected to the claw tail; wherein, the claw tail includes an active claw piece, the active claw piece being arc-shaped and one end being arranged along the circumference of the end of the cylindrical body; the number of passive claw pieces of the passive claw body is the same as the number of active claw pieces, and the active claw pieces and the passive claw pieces are staggered, the active claw piece being located on one side of the passive claw piece and the active claw piece abutting against the passive claw piece.

[0007] According to an embodiment of this application, the length of the arc edge connecting the active claw and the cylindrical body is 1 / 3 of the circumference of the connecting end of the cylindrical body. When the active claw and the passive claw are mated and abutted, there is an arc-shaped gap between the two ends that are not mated.

[0008] According to an embodiment of this application, the gap between the active claw and the passive claw is 1 / 3 of the circumference of the end of the cylindrical body.

[0009] According to an embodiment of this application, the worm and the turbine head achieve transmission through meshing. The helical teeth of the worm mesh with the tooth surface of the turbine head, transmitting the power of the motor to the turbine head.

[0010] According to an embodiment of this application, the cylindrical body, turbine head, limiting ring, and claw tail are integrally formed.

[0011] According to embodiments of this application, both the inertial drive claw and the passive claw body are claw bodies made of metal.

[0012] According to an embodiment of this application, the passive claw body is also a cylindrical body, and its diameter is the same as that of the cylindrical body of the inertial transmission claw.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] In this application, an electric actuator is connected to an inertial drive claw as the active claw, and a passive claw body is installed on the valve. The passive claw plate and the active claw plate are connected to form a near-cylinder shape, with a gap occupying 1 / 3 of the outer surface of the cylinder between the passive claw plate and the active claw plate. When the valve is closed, the inertial drive claw rotates in the forward direction, and when the valve is opened, the inertial drive claw rotates in the reverse direction. Because of the gap, the motor is unloaded at the beginning of valve opening, the motor starting current is small, which protects the motor and extends its life. When the inertial drive claw rotates in the reverse direction, sufficient rotational inertia can be obtained due to the gap between the passive claw plate and the active claw plate. The impact force of the rotational inertia is beneficial to the opening of the valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0016] Figure 1 This is a front view of a transmission device connected to a valve screw, as exemplified by this utility model.

[0017] Figure 2 This is a cross-sectional view of the inertial transmission claw and the passive claw body after they are connected in this example of the present invention.

[0018] The annotations in the attached figures are explained as follows:

[0019] 10. Cylindrical body, 11. Turbine head, 12. Limiting ring, 13. Claw tail, 14. Clearance, 21. Passive claw, 131. Active claw. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The terms “first,” “second,” and similar terms used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a,” and similar terms, do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0022] according to Figure 1 and Figure 2 This utility model provides a transmission device connected to a valve screw, including an inertial transmission claw and a matching passive claw body. The electric device and the valve are driven by the inertial transmission claw. The inertial transmission claw can be made of metal material, and its structure includes a turbine head 11, a limiting ring 10, and a claw tail 13. The inertial transmission claw has a hollow structure to facilitate the insertion of the valve screw. The limiting ring 10 is installed in the limiting groove to ensure the smooth rotation of the inertial transmission claw.

[0023] In this embodiment, the inertial transmission claw is a cylindrical body 10 with openings at both ends. One end of the cylindrical body 10 is provided with a turbine head 11, which meshes with a worm gear, and the worm gear is connected to a motor. The other end of the cylindrical body 10 is provided with a claw tail 13, which is connected to a valve screw. Near the claw tail 13, the cylindrical body 10 is also provided with a limiting ring 10. A limiting disk is fixed on the motor, and the limiting disk is provided with a limiting groove that matches the limiting ring 10.

[0024] Specifically, the worm and the turbine head 11 achieve transmission through meshing. The helical teeth of the worm mesh with the tooth surface of the turbine head 11, transmitting the power of the motor to the turbine head 11.

[0025] Specifically, the cylindrical body 10, turbine head 11, limiting ring 10 and claw tail 13 are integrally formed, which facilitates production and manufacturing.

[0026] In this embodiment, the passive claw body passes through and is fixed to the valve screw at its center, and is connected to the claw tail 13. The claw tail 13 includes an active claw piece 131, which is arc-shaped and has one end arranged along the circumference of the end of the cylindrical body 10. The number of passive claw pieces 21 on the passive claw body is the same as the number of active claw pieces 131, and the active claw pieces 131 and the passive claw pieces 21 are staggered, with the active claw piece 131 located on one side of the passive claw piece 21 and abutting against the passive claw piece 21.

[0027] Specifically, the length of the arc edge connecting the active claw 131 and the cylindrical body 10 is 1 / 3 of the circumference of the connecting end of the cylindrical body 10. When the active claw 131 and the passive claw 21 are matched and abutted, there is an arc-shaped gap 14 between the ends of the two that are not abutting.

[0028] Specifically, the gap 14 between the active claw 131 and the passive claw 21 is one-third of the circumference of the end of the cylindrical body 10.

[0029] Specifically, both the inertial drive claw and the passive claw body are made of metal, such as stainless steel or aluminum alloy.

[0030] Specifically, the passive claw body is also a cylindrical body 10, and its diameter is the same as that of the cylindrical body 10 of the inertial transmission claw.

[0031] The working process of a transmission device connected to a valve screw in this embodiment is as follows: after the motor starts, power is transmitted to the worm through the connection between the motor shaft and the worm; the worm rotates and meshes with the turbine head 11, driving the turbine head 11 to rotate; the rotation of the turbine head 11 is transmitted to the passive claw of the valve through the inertial transmission claw, and the passive claw drives the valve screw or actuator to realize the opening, closing or adjustment of the valve according to the rotation of the turbine head 11.

[0032] The working principle of the transmission device connected to the valve screw in this embodiment is as follows: When the valve is closed, in order to ensure that the valve is tightly closed, there is generally a certain tightness between the door plate and the door body. Due to the tightness, coupled with the increased pressure difference between the front and back of the door plate after the valve is tightly closed, and the possibility of impurities in the medium flowing in the valve, the valve may jam, making it difficult to open. In this application, the inertial transmission claw is used as the active claw and is connected to the passive claw of the valve. When the valve is closed, the inertial transmission claw rotates in the forward direction, and when the valve is opened, the transmission claw rotates in the reverse direction. Because there is a 1 / 3 annular gap between the passive claw plate 21 and the active claw plate 131, the motor is unloaded at the beginning of the valve opening, the motor starting current is small, which protects the motor and extends its life. When the inertial active claw rotates in the reverse direction, it can obtain sufficient rotational inertia due to the 1 / 3 annular gap. The impact force of the rotational inertia is beneficial to the opening of the valve.

[0033] The above are merely exemplary embodiments of this application and are not intended to limit the scope of protection of this application, which is determined by the appended claims.

Claims

1. A transmission device connected to a valve screw, characterized in that, include: The inertial transmission claw has a main body that is open at both ends. One end of the cylinder is provided with a turbine head, which meshes with a worm gear, and the worm gear is connected to a motor. The other end of the cylinder is provided with a claw tail, which is connected to a valve screw. Near the claw tail, the cylinder is also provided with a limiting ring. A limiting plate is fixed on the motor, and the limiting plate is provided with a limiting groove that matches the limiting ring. A passive claw body passes through the valve screw at its center and is fixed thereto; the passive claw body is connected to the claw tail. The claw tail includes an active claw piece, which is arc-shaped and has one end arranged along the circumference of the end of the cylindrical body; the number of passive claw pieces of the passive claw body is the same as the number of active claw pieces, and the active claw pieces and passive claw pieces are staggered with each other, with the active claw piece located on one side of the passive claw piece and the active claw piece abutting against the passive claw piece.

2. The transmission device connected to a valve screw according to claim 1, characterized in that, The length of the arc edge connecting the active claw to the cylindrical body is 1 / 3 of the circumference of the connecting end of the cylindrical body. When the active claw and the passive claw are matched and abutted, there is an arc-shaped gap between the ends of the two that are not abutting.

3. The transmission device connected to the valve screw according to claim 2, characterized in that, The gap between the active claw and the passive claw is one-third of the circumference of the end of the cylindrical body.

4. The transmission device connected to a valve screw according to claim 1, characterized in that, The worm and the turbine head achieve transmission through meshing. The helical teeth of the worm mesh with the tooth surface of the turbine head, transmitting the power of the motor to the turbine head.

5. The transmission device connected to a valve screw according to claim 1, characterized in that, The cylindrical body, turbine head, limiting ring, and claw tail are integrally formed.

6. The transmission device connected to a valve screw according to claim 1, characterized in that, Both the inertial drive claw and the passive claw body are made of metal.

7. The transmission device connected to a valve screw according to claim 1, characterized in that, The passive claw body is also a cylindrical body, and its diameter is the same as that of the inertial transmission claw.

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