Actuating mechanism of valve

Abstract

The utility model discloses an actuating mechanism of a valve, and belongs to the technical field of valve equipment. One end of the first rotating shaft is coaxially and fixedly connected with the rotating shaft, the other end of the first rotating shaft is provided with an annular part, and the inner wall of the annular part is provided with a sunken part; one end of the second rotating shaft is fixedly connected with the rotating shaft of the power mechanism; through holes are formed in the middle ring in the radial direction of the middle ring. The through holes are matched with pins and reset elements pushing the pins to move inwards in the radial direction of the middle ring. The hand wheel is coaxially and fixedly connected with the first rotating shaft, the middle ring is inserted into the annular portion and can rotate freely, the cam portion is inserted into the middle ring and can rotate freely, and the pin abuts against the variable-diameter outer wall face of the cam portion. And during manual operation, switching of means operation can be completed only by rotating the hand wheel forwards and reversely by a certain angle, the switching mode is simple, and the operation convenience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve equipment, and specifically to an actuator of a valve for moving a valve core. Background Art

[0002] As a key component for controlling fluid flow, valves are widely used in water treatment, chemical industry, petroleum, natural gas, as well as heating and air-conditioning systems. With the continuous progress of technology, the design and operation methods of valves have evolved from manual to electric, pneumatic, and hydraulic, which has greatly improved the operation convenience and efficiency, reduced the need for manual operation, and thus significantly reduced the labor intensity.

[0003] However, although electric and pneumatic valves bring many conveniences, they require external functions. Therefore, handwheels are provided for abnormal working conditions of energy loss so that they can be manually operated in case of emergency. Usually, to switch the valve to manual control, workers need to perform an additional switching operation to disconnect the valve stem of the power structure from the original system, and the operation is relatively cumbersome, which may cause delays in case of emergency. Worse still, due to workers' long-term dependence on electric or pneumatic operation, the skills of manual operation often become rusty or even completely forgotten due to lack of practice. This makes it possible that workers may not be able to complete the task proficiently when manual operation is really needed, thus affecting the stability and safety of the system. Summary of the Utility Model

[0004] In view of the above problems, the purpose of the utility model is to provide an actuator of a valve, which simplifies the steps of manual switching, reduces the operation complexity, and ensures that workers can perform manual operation quickly and accurately.

[0005] To achieve the above technical purpose, the following technical solution is adopted by the utility model:

[0006] An actuator of a valve, comprising:

[0007] A support frame fixedly connected to the valve body;

[0008] A guide wheel rotatably connected to the support frame and threadedly connected to the valve stem;

[0009] A transmission mechanism for driving the guide wheel to rotate, the transmission mechanism includes a rotating shaft;

[0010] A switching mechanism, comprising:

[0011] A first rotating shaft with one end coaxially and fixedly connected to the rotating shaft and the other end provided with an annular portion, and a recessed portion is provided on the inner wall of the annular portion;

[0012] A second rotating shaft with one end fixedly connected to the rotating shaft of the power mechanism and a cam portion provided at the other end. The cam portion includes a variable-diameter outer wall surface and an equal-diameter outer wall surface.

[0013] An intermediate ring is provided with through holes arranged radially thereon. The through holes are equipped with pins and a reset element for pushing the pins to move radially inward along the intermediate ring. The intermediate ring is inserted into the annular portion and can rotate freely. The cam portion is inserted into the intermediate ring and can rotate freely. The pin abuts against the variable-diameter outer wall surface of the cam portion. When the second rotating shaft rotates, it will push the pin to move radially outward until one end of the pin abuts against the variable-diameter outer wall surface and the other end abuts against the inner wall of the recessed portion.

[0014] A handwheel fixedly connected coaxially with the first rotating shaft.

[0015] The power mechanism.

[0016] As a specific embodiment of the present invention, the transmission mechanism includes a rotating shaft carried on a support frame and capable of rotating freely. A first gear is fixedly connected coaxially on the rotating shaft. The outer wall of the guide wheel is provided with a second gear, and the second gear meshes with the first gear, so as to drive the valve stem to rise and fall by rotating the rotating shaft.

[0017] As a specific embodiment of the present invention, the transmission mechanism includes a worm gear and a worm. The worm gear is integrally formed with the guide wheel, and the worm is fixedly connected coaxially with the rotating shaft, so as to be able to drive the guide wheel to rotate through the worm, achieving the purpose of controlling the rise and fall of the valve stem.

[0018] As a specific embodiment of the present invention, the reset element is a spring.

[0019] As a specific embodiment of the present invention, the reset element is a magnet built into the cam portion, used to adsorb the pin so that it abuts against the outer wall of the cam portion.

[0020] Compared with the prior art, the technical solution of the present invention has the following technical effects:

[0021] When the present invention is in use, only by rotating the handwheel forward and backward by a certain angle respectively, the linkage components of the rotating shaft of the power mechanism and the rotating shaft can be completely disengaged, that is, switched from being driven by the power mechanism to manual operation. Once the power mechanism rotates, it can drive the rotating shaft to rotate, that is, switched to the power structure driving state. Generally speaking, the switching method is simple and can improve the convenience of operation. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the transmission mechanism in Embodiment 1 of the present invention;

[0023] Figure 2 It is a schematic overall structural diagram of the switching mechanism in Embodiment 1 of the present invention;

[0024] Figure 3 is Figure 2 A perspective view of each component of the switching mechanism in

[0025] Figure 4 is Figure 2 A schematic diagram of the working state of the switching mechanism in

[0026] Figure 5 Is a schematic structural diagram of the transmission mechanism in Embodiment 1 of the present utility model;

[0027] Figure 6 is Figure 5 A top view of the transmission mechanism in

[0028] In the figure, the support frame 1000, the guide wheel 2000, the transmission mechanism 3000, the switching mechanism 4000, the valve body 5000,

[0029] The rotating shaft 3100, the first gear 3200, the worm gear 3300; the worm 3400, the first rotating shaft 4100, the second rotating shaft 4200, the intermediate ring 4300, the valve stem 5100,

[0030] The annular portion 4110, the recessed portion 4111, the cam portion 4210, the variable-diameter outer wall surface 4211, the equal-diameter outer wall surface 4212, the through hole 4310, the pin 4320, the reset element 4330. Detailed implementation manners

[0031] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0032] Embodiment

[0033] Embodiment 1

[0034] Please refer to Figures 1 - 4 , which shows the structure of the actuator of the valve in this embodiment. The actuator of the valve in this embodiment includes a support frame 1000, a guide wheel 2000, a transmission mechanism 3000, a switching mechanism 4000, a hand wheel (not shown in the figure) and a power mechanism (not shown in the figure).

[0035] In this embodiment, the support frame 1000 is fixedly connected to the valve body 5000 and is used to carry other components; the guide wheel 2000 is rotatably connected to the support frame 1000 and is threadedly connected to the valve stem 5100. Therefore, the forward and reverse rotation of the guide wheel 2000 will drive the valve stem 5100 to rise and fall, thereby opening and closing the valve. The above structures are all conventional valve structures and belong to the prior art, so they will not be elaborated here.

[0036] In this embodiment, the transmission mechanism 3000 is used to transmit the rotation of the handwheel and the power mechanism to the guide wheel 2000, so as to drive the guide wheel 2000 to rotate and lift the valve stem 5100. As Figure 1 shown, the transmission mechanism 3000 includes a rotating shaft 3100 carried on the support frame 1000 and capable of freely rotating. A first gear 3200 is coaxially and fixedly connected to the rotating shaft 3100. A second gear is fixedly connected to the outer wall of the guide wheel 2000. Both the second gear and the first gear 3200 are bevel gears and are meshed with each other, so that the valve stem 5100 can be driven to lift by rotating the rotating shaft 3100.

[0037] In this embodiment, the switching mechanism 4000 includes a first rotating shaft 4100, a second rotating shaft 4200, and an intermediate ring 4300. One end of the first rotating shaft 4100 is coaxially and fixedly connected to the rotating shaft 3100, so that the rotating shaft 3100 can be driven to rotate by the first rotating shaft 4100. An annular portion 4110 is provided at the other end of the first rotating shaft 4100, and a recessed portion 4111 is provided on the inner wall of the annular portion 4110; one end of the second rotating shaft 4200 is fixedly connected to the rotating shaft of the power mechanism, and a cam portion 4210 is provided at the other end. The cam portion 4210 includes a variable-diameter outer wall surface 4211 and an equal-diameter outer wall surface 4212; a through hole 4310 arranged along the radial direction of the intermediate ring 4300 is provided on the intermediate ring 4300. The through hole 4310 is equipped with a pin 4320 and a reset element 4330 for pushing the pin 4320 to move radially inward along the intermediate ring 4300; the intermediate ring 4300 is inserted into the annular portion 4110 and can rotate freely, the cam portion 4210 is inserted into the intermediate ring 4300 and can rotate freely, the pin 4320 abuts against the variable-diameter outer wall surface 4211 of the cam portion 4210. When the second rotating shaft 4200 rotates relative to the intermediate ring 4300, the pin 4320 will be pushed to move radially outward until one end of the pin 4320 abuts against the variable-diameter outer wall surface 4211 and the other end abuts against the inner wall of the recessed portion 4111, so that the pin 4320 is inserted into the recessed portion 4111, and the second rotating shaft 4200 drives the first rotating shaft 4100 to rotate coaxially. When the second rotating shaft 4200 does not rotate, the first rotating shaft 4100 can be rotated forward and backward by a certain angle to drive the intermediate ring 4300 to rotate through the pin 4320 until the pin 4320 moves radially toward the second rotating shaft 4200 and enters the through hole 4310. In this way, when the first rotating shaft 4100 rotates, it will not drive the second rotating shaft 4200 to rotate. In use, the handwheel is coaxially and fixedly connected to the first rotating shaft 4100, and the second rotating shaft 4200 is coaxially and fixedly connected to the rotating shaft of the power mechanism. When the power mechanism rotates, it can drive the guide wheel 2000 to rotate through the second rotating shaft 4200; when the power mechanism fails (when the second rotating shaft 4200 stops rotating), since the worker cannot distinguish whether to rotate forward or backward to make the pin 4320 contract radially inward, the worker can rotate the first rotating shaft 4100 forward and backward by a certain angle through the handwheel, so that the pin 4320 will surely move radially toward the first rotating shaft 4100 and enter the through hole 4310, and the first rotating shaft 4100 is disengaged from the second rotating shaft 4200. Then, the first rotating shaft 4100 can be rotated through the handwheel to control the rotation of the guide wheel 2000. Since the first rotating shaft 4100 is disengaged from the second rotating shaft 4200, rotating the handwheel does not drive the rotating shaft of the power mechanism to rotate, which can also reduce the labor intensity of manual operation. The power mechanism in this embodiment can be an electric motor. Of course, the electric motor needs to have the functions of forward rotation and reverse rotation in order to be able to open and close the valve.

[0038] The reset element in this example can be asFigure 4 As shown, a spring is adopted. Of course, the reset element can also be a magnet built into the cam portion 4210, which attracts the pin 4320 to move radially inward by magnetic force and abuts against the outer wall of the cam portion 4210.

[0039] Embodiment 2

[0040] Please refer to Figures 5 - 6 , which shows the structure of the actuator of the valve in this embodiment. The actuator of the valve in this embodiment includes a support frame 1000, a guide wheel 2000, a transmission mechanism 3000, a switching mechanism 4000, a handwheel and a power mechanism. The difference between this embodiment and Embodiment 1 lies in the different transmission mechanism 3000.

[0041] The transmission mechanism 3000 of this embodiment includes a worm gear 3300 and a worm 3400. The worm gear 3300 is integrally formed with the guide wheel 2000, and the worm 3400 is coaxially and fixedly connected to the rotating shaft 3100, so that the guide wheel 2000 can be driven to rotate by the worm 3400 to achieve the purpose of controlling the lifting of the valve stem 5100.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A valve actuator, characterized in that: include: A support frame fixedly connected to the valve body; A guide wheel rotatably connected to the support frame and threadedly connected to the valve stem; A transmission mechanism for driving the guide wheel to rotate, wherein the transmission mechanism comprises a rotating shaft; Switching mechanism, including: A first rotating shaft having one end coaxially fixedly connected to the rotating shaft and an annular portion disposed at the other end, wherein the inner wall of the annular portion is provided with a recessed portion; A second rotating shaft having one end fixedly connected to the rotating shaft of the power mechanism and the other end provided with a cam portion, wherein the cam portion includes a variable diameter outer wall surface; An intermediate ring, wherein the intermediate ring is provided with through holes arranged along its radial direction; the through holes are equipped with pins and a reset element for pushing the pins to move radially inward along the intermediate ring; the intermediate ring is inserted into the annular portion and can rotate freely, the cam portion is inserted into the intermediate ring and can rotate freely, the pin abuts against the variable diameter outer wall surface of the cam portion, and when the second rotating shaft rotates, it will push the pin to move radially outward until one end of the pin abuts against the variable diameter outer wall surface and the other end abuts against the inner wall of the recessed portion; A hand wheel coaxially and fixedly connected to the first rotating shaft; Power mechanism.

2. A valve actuator according to claim 1, characterized in that: The transmission mechanism includes a rotating shaft which is carried on the support frame and can rotate freely, a first gear is coaxially fixedly connected to the rotating shaft, a second gear is provided on the outer wall of the guide wheel, and the second gear is meshed with the first gear.

3. A valve actuator according to claim 1, characterized in that: The transmission mechanism comprises a worm wheel and a worm, the worm wheel and the guide wheel are integrally formed, and the worm is coaxially fixedly connected to the rotating shaft, so that the guide wheel can be driven to rotate by the worm.

4. A valve actuator according to claim 1, characterized in that: The reset element is a spring.

5. The valve actuator according to claim 1, characterized in that: The reset element is a magnet built into the cam portion, and is used for adsorbing the pin to make it abut against the outer wall of the cam portion.

6. The valve actuator according to claim 1, characterized in that: The power mechanism is an electric motor.

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