Novel valve electric actuator

Abstract

The utility model relates to the technical field of valve control, in particular to a novel valve electric actuator which comprises a valve body, an actuator body and an auxiliary limiting device, connecting discs are installed at the left end and the right end of the valve body respectively, a lower connecting seat is connected to the top end of the valve body in a welded mode, and a driving motor is installed on the side wall of the actuator body. An upper connecting seat is installed at the bottom end of the actuator body, a limiting screw drives a limiting block to linearly move from a movable groove to a threaded rod under the action of a bearing seat, sliding blocks at the two ends of the limiting block also move to the threaded rod under the action of a spring, and when the side wall of the limiting block makes contact with the side wall of the threaded rod, the sliding blocks move to the threaded rod. And rotation of the limiting screw rod is stopped, movement of the limiting block is limited by threads of the limiting screw rod, meanwhile, the sliding block is supported by the spring in the sliding groove, it is ensured that the limiting block can stably conduct auxiliary limiting on the threaded rod, and stable connection of the valve body and the actuator body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve control, in particular to a novel electric valve actuator. Background Art

[0002] As we all know, the valve electric actuator is a mechanical device that uses electricity as its main energy source to drive the valve. It is an indispensable and important component of the intelligent valve control system. Its main function is to receive the control signal sent by the controller and change the flow of the controlled medium, thereby maintaining the controlled variable at the required value or within a certain range.

[0003] The connection between traditional valve electric actuators and valve bodies usually adopts a screw connection. Although this connection method is simple and reliable, in actual applications, due to the complex and changeable working environment, such as the influence of external factors such as vibration and impact, the screw connection is prone to loosening. Once the connection is loose, it will not only affect the normal operation of the valve electric actuator, resulting in inaccurate control of the fluid medium, but may even cause safety accidents and seriously reduce the stability of the entire system. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a novel electric valve actuator.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of valve electric actuator, comprising a valve body, an actuator body and an auxiliary limit device, wherein connecting plates are installed at both ends of the valve body, a lower connecting seat is welded to the top of the valve body, a driving motor is installed on the side wall of the actuator body, an upper connecting seat is installed at the bottom end of the actuator body, a plurality of upper connecting holes are opened in a ring shape on the upper connecting seat, a plurality of lower connecting holes are opened in a ring shape on the lower connecting seat, a threaded rod is threadedly installed between the upper connecting hole and the lower connecting hole, and the auxiliary limit The device includes a movable groove, a limit screw, a bearing seat, a limit block, a slide groove, a slider and a spring. The movable groove is opened on the side wall of the lower connecting hole away from the center of the lower connecting seat, the limit block is movably installed in the movable groove, the limit screw is threadedly installed on the side wall of the lower connecting seat, the limit screw and the limit block are connected to the bearing seat, the slide groove is installed at both ends of the movable groove, the slider is installed at both ends of the limit block, the slider is slidably connected to the slide groove, and the spring for supporting the slider is installed in the slide groove.

[0008] In order to guide the movement of the slider, the present invention is improved in that a guide rod is fixedly installed in the sliding groove, and the slider is slidably sleeved on the outer wall of the guide rod.

[0009] In order to adapt to the side wall of the threaded rod, the present invention is improved in that the end of the limit block close to the threaded rod is designed to be arc-shaped.

[0010] In order to increase the friction with the side wall of the threaded rod, the present invention is improved in that a rubber pad is installed at one end of the limiting block away from the limiting screw rod.

[0011] In order to facilitate manual driving of the limiting screw, the present invention is improved in that a knob is installed at one end of the limiting screw away from the lower connecting seat.

[0012] In order to improve the anti-slip property of the knob, the utility model is improved in that anti-slip grooves are installed on the knob.

[0013] In order to facilitate manual adjustment of the opening and closing of the valve body, the utility model is improved in that a hand wheel is installed on the top of the actuator body.

[0014] In order to ensure the stability of the operation of the driving motor, the utility model is improved in that the driving motor is a servo motor.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a new type of electric valve actuator with the following beneficial effects:

[0017] This new type of valve electric actuator has an auxiliary limit device. The limit block contacts the outer wall of the threaded rod through the rotation of the limit screw. The limit block is limited by the thread of the limit screw. At the same time, the slider is supported by the spring in the slide groove, ensuring that the limit block can stably assist in limiting the threaded rod, thereby achieving a stable connection between the actuator body and the valve body, ensuring a more stable connection between the actuator body and the valve body, reducing loosening or displacement caused by vibration or external force, and thus improving the stability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the actuator body and valve body separated in the utility model;

[0020] Figure 3 This is a partially half-cut three-dimensional structural diagram of the lower connecting seat of the valve body of the present invention;

[0021] Figure 4 For this utility model Figure 3 An enlarged structural diagram of part A.

[0022] In the figure: 1. Valve body; 2. Actuator body; 3. Connecting plate; 4. Lower connecting seat; 5. Drive motor; 6. Upper connecting seat; 7. Upper connecting hole; 8. Lower connecting hole; 9. Threaded rod; 10. Movable groove; 11. Limit screw; 12. Bearing seat; 13. Limit block; 14. Slide groove; 15. Slider; 16. Spring; 17. Guide rod; 18. Rubber pad; 19. Knob; 20. Hand wheel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4A new type of valve electric actuator includes a valve body 1, an actuator body 2 and an auxiliary limit device. The left and right ends of the valve body 1 are both equipped with connecting plates 3. The top of the valve body 1 is welded with a lower connecting seat 4. The side wall of the actuator body 2 is equipped with a driving motor 5. The bottom end of the actuator body 2 is equipped with an upper connecting seat 6. The upper connecting seat 6 is provided with a plurality of upper connecting holes 7 in a ring shape. The lower connecting seat 4 is provided with a plurality of lower connecting holes 8 in a ring shape. A threaded rod 9 is threadedly installed between the upper connecting hole 7 and the lower connecting hole 8. The auxiliary limit device includes a movable groove 10, a limit The movable groove 10 is provided on the side wall of the lower connecting hole 8 away from the center of the lower connecting seat 4. The limit block 13 is movably installed in the movable groove 10. The side wall of the lower connecting seat 4 is threaded with the limit screw 11. The limit screw 11 is connected to the limit block 13 through the bearing seat 12. The left and right ends of the movable groove 10 are both equipped with the slide groove 14. The left and right ends of the limit block 13 are both equipped with the slide block 15. The slide block 15 slides with the slide groove 14. The spring 16 supporting the slider 15 is installed in the slide groove 14. In this embodiment, when in use, when the actuator body 2 needs to be installed on the valve body 1, first align the upper connecting seat 6 with the lower connecting seat 4, adjust the angles of the upper connecting seat 6 and the lower connecting seat 4, so that each group of upper connecting holes 7 and lower connecting holes 8 are aligned, and then the threaded rod 9 is passed through the upper connecting holes 7 and the lower connecting holes 8 from top to bottom to thread the upper connecting seat 6 and the lower connecting seat 4, and then manually rotate the limiting screw 11. During the rotation process, the limiting screw 11 extends and moves in the direction of the movable groove 10, and the limiting screw 11 is rotated. The screw 11 drives the limit block 13 to move linearly from the movable groove 10 toward the threaded rod 9 under the action of the bearing seat 12. The sliders 15 at both ends of the limit block 13 also move with the limit block 13 toward the threaded rod 9 under the action of the spring 16. When the side wall of the limit block 13 contacts the side wall of the threaded rod 9, the rotation of the limit screw 11 is stopped. The movement of the limit block 13 is limited by the thread of the limit screw 11. At the same time, the slider 15 is supported by the spring 16 in the slide groove 14 to ensure that the limit block 13 can stably assist in limiting the threaded rod 9, thereby realizing a stable connection between the valve body 1 and the actuator body 2.

[0025] During actual use, the movement of the slider 15 is further guided. In this embodiment, a guide rod 17 is fixedly installed in the slide groove 14, and the slider 15 is slidably sleeved on the outer wall of the guide rod 17. The guide rod 17 provides a clear path for the movement of the slider 15, ensuring that the slider 15 moves along a predetermined track in the slide groove 14, avoiding shaking or jumping caused by deviation from the track, thereby improving the stability of the entire device.

[0026] During actual use, it is further adapted to the side wall of the threaded rod 9. In this embodiment, the limit block 13 is designed in an arc shape at one end close to the threaded rod 9. The arc shape is more matched with the shape of the side wall of the threaded rod 9, which can ensure that the limit block 13 and the threaded rod 9 fit more closely, reduce the gap or looseness caused by shape mismatch, and thus improve the stability and reliability of the limiting effect.

[0027] During actual use, in order to further increase the friction with the side wall of the threaded rod 9, in this embodiment, a rubber pad 18 is installed at one end of the limit block 13 away from the limit screw 11. The material of the rubber pad 18 can increase the friction with the side wall of the threaded rod 9, so that the limit block 13 can be more stably fixed on the threaded rod 9 and is not easy to slide or shift, thereby improving the stability and reliability of the limiting effect.

[0028] During actual use, it is further convenient to manually drive the limit screw 11. In this embodiment, a knob 19 is installed at the end of the limit screw 11 away from the lower connecting seat 4. The design of the knob 19 allows the user to perform more precise and accurate operations. The user can accurately control the moving distance and force of the limit screw 11 by adjusting the rotation angle and force of the knob 19.

[0029] During actual use, in order to further improve the anti-slip property of the knob 19, in this embodiment, the knob 19 is installed with anti-slip grooves. The design of the anti-slip grooves increases the friction coefficient of the surface of the knob 19, so that the user's hand can hold the knob 19 more stably when it contacts it, reducing misoperation or operational errors caused by hand slippage.

[0030] In actual use, it is further convenient to manually adjust the opening and closing of the valve body 1. In this embodiment, a hand wheel 20 is installed on the top of the actuator body 2. When the electric actuator cannot work normally due to external factors, the hand wheel 20 provides a fast and direct emergency operation method, allowing the operator to manually adjust the opening and closing of the valve body 1 to ensure the continuity and safety of the production process.

[0031] During actual use, the stability of the operation of the drive motor 5 is further guaranteed. In this embodiment, the drive motor 5 is a servo motor. The servo motor can control the position, speed and torque with high precision. The servo motor adopts closed-loop control and has good stability. It can avoid problems such as stall and vibration, and ensure the stability and accuracy of the operation of the drive motor 5.

[0032] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel electric valve actuator, comprising a valve body (1), an actuator body (2) and an auxiliary limit device, characterized in that: The left and right ends of the valve body (1) are both provided with connecting plates (3), the top of the valve body (1) is welded with a lower connecting seat (4), the side wall of the actuator body (2) is provided with a driving motor (5), the bottom end of the actuator body (2) is provided with an upper connecting seat (6), a plurality of upper connecting holes (7) are provided in an annular shape on the upper connecting seat (6), a plurality of lower connecting holes (8) are provided in an annular shape on the lower connecting seat (4), a threaded rod (9) is threadedly provided between the upper connecting hole (7) and the lower connecting hole (8), and the auxiliary limiting device includes a movable groove (10), a limiting screw (11), a bearing seat (12), a limiting block (13), a sliding groove (14), a slider (15) and a spring (1 6), the side wall of one end of the lower connecting hole (8) away from the center of the lower connecting seat (4) is provided with the movable groove (10), the limit block (13) is movably installed in the movable groove (10), the side wall of the lower connecting seat (4) is threadedly installed with the limit screw (11), the limit screw (11) and the limit block (13) are connected through the bearing seat (12), the left and right ends of the movable groove (10) are both provided with the slide groove (14), the left and right ends of the limit block (13) are both provided with the slider (15), the slider (15) is slidably connected to the slide groove (14), and the slide groove (14) is provided with the spring (16) for supporting the slider (15).

2. A novel electric valve actuator according to claim 1, characterized in that: A guide rod (17) is fixedly installed in the sliding groove (14), and the sliding block (15) is slidably sleeved on the outer wall of the guide rod (17).

3. A novel electric valve actuator according to claim 2, characterized in that: The end of the limiting block (13) close to the threaded rod (9) is designed to be arc-shaped.

4. A novel electric valve actuator according to claim 3, characterized in that: A rubber pad (18) is installed at one end of the limiting block (13) away from the limiting screw (11).

5. A novel electric valve actuator according to claim 4, characterized in that: A knob (19) is installed at one end of the limiting screw (11) away from the lower connecting seat (4).

6. A novel electric valve actuator according to claim 5, characterized in that: The knob (19) is provided with anti-slip grooves.

7. A novel electric valve actuator according to claim 6, characterized in that: A hand wheel (20) is installed on the top end of the actuator body (2).

8. A novel electric valve actuator according to claim 7, characterized in that: The driving motor (5) is a servo motor.

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