Partial rotation electric actuating mechanism control module

Abstract

The utility model relates to the technical field of actuators, in particular to a partial rotary electric actuating mechanism control module, which comprises a shell, a rotary disc, a control module and a control module, the shell is of a hollow semicircular structure, and a valve rod is fixedly arranged at the circle center of the rotary disc in a penetrating manner; an arc-shaped plate is arranged on the outer side of the rotating disc, and reset springs are fixed to the two ends of the limiting sliding block. A driving motor and a hand wheel are respectively arranged at two ends of the worm; the device has the beneficial effects that the rotating disc is arranged to be of a 90-degree fan-shaped structure, the arc-shaped plate is slidably installed on the arc-shaped side wall of the rotating disc, the worm gear groove is formed in the surface of the arc-shaped plate, the reset spring can push the rotating disc to synchronously rotate along with the arc-shaped plate, and the rotating disc stops rotating until the rotating disc rotates by 90 degrees; the arc-shaped plate continues to rotate and compresses the reset spring, at the moment, the worm gear groove in the surface of the arc-shaped plate is disengaged from the worm, even if the worm continues to rotate, the valve rod fixed to the rotating disc does not continue to rotate, and therefore the accuracy of the rotating angle of the valve rod is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a control module of a partial-rotation electric actuator. Background Art

[0002] Part-turn electric actuators are driving devices that open, close or regulate valves. They are suitable for valves that can be rotated 90 degrees, such as butterfly valves, ball valves, plug valves and dampers.

[0003] In the prior art, electric actuators are usually driven by a motor to rotate a valve stem, and a travel switch controls the motor to stop working when the valve stem rotates to a maximum angle.

[0004] However, currently, as the primary control element for controlling valve stem rotation, travel switches can be difficult to accurately control when they malfunction. This can lead to inaccurate opening and closing of butterfly valves, ball valves, and other valve cores, thus affecting the proper functioning of the valves. Therefore, this utility model proposes a control module for a partial-turn electric actuator to address this issue. Utility Model Content

[0005] The purpose of the present invention is to provide a partial-rotation electric actuator control module to solve the problem in the above-mentioned background technology that the valve stem rotation angle is difficult to accurately control and affects the normal opening and closing of the valve core.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a partial-rotation electric actuator control module, comprising:

[0007] The housing is configured as a hollow semicircular structure, a rotating disk is rotatably mounted in the inner cavity of the housing, the rotating disk is configured as a 90-degree fan-shaped structure, a valve stem is fixedly provided through the center of the rotating disk, and the valve stem is movably connected to the center of the housing;

[0008] The arc-shaped side wall of the rotating disk is provided with a limit slot, an arc-shaped plate is provided on the outer side of the rotating disk, a limit slider is fixed on the inner wall of the arc-shaped plate, the limit slider is slidably installed in the inner cavity of the limit slot, and return springs are fixed at both ends of the limit slider;

[0009] A worm is rotatably mounted on the outer side of the arc plate. A worm wheel groove engaging with the worm is provided on the surface of the arc plate. A driving motor and a hand wheel are respectively provided at both ends of the worm.

[0010] Preferably, the length of the limiting slider is smaller than the length of the limiting slot, and the inner walls at both ends of the limiting slot are provided with receiving slots, and the end of the reset spring extends into the inner cavity of the receiving slot and is fixedly connected to the inner wall.

[0011] Preferably, support frames are movably sleeved on the outer sides of both ends of the worm, and the support frames are fixed to the side walls of the housing, and a protective cover sleeved on the outer side of the worm is fixed between the two support frames.

[0012] Preferably, the drive motor is fixed to a side surface of a support frame, and the output shaft of the drive motor is fixedly connected to one end of the worm.

[0013] Preferably, a sleeve is fixedly provided in the middle of the other support frame, the other end of the worm is rotatably inserted into the inner cavity of one end of the sleeve through a bearing, and a polygonal slot is provided on the other end surface of the worm.

[0014] Preferably, the rotating shaft of the handwheel is movably inserted into the inner cavity of the other end of the sleeve, and a polygonal plug-in block is fixed to the end of the rotating shaft of the handwheel, and the polygonal plug-in block is movably inserted into the inner cavity of the polygonal slot.

[0015] Preferably, the middle fixed sleeve of the handwheel shaft is provided with a retaining ring, and a thrust spring is provided on one side of the retaining ring. The thrust spring is located in the inner cavity of the sleeve and presses against the middle inner wall of the sleeve. The thrust spring pushes the polygonal plug away from the polygonal slot through elastic force.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model arranges the rotating disk into a ninety-degree fan-shaped structure, and a curved plate is slidably mounted on the curved side wall of the rotating disk, a worm gear groove is opened on the surface of the curved plate, a limit slider is fixed to the inner wall of the curved plate, and reset springs are provided at both ends of the limit slider. When the worm rotates and drives the curved plate to move, the reset spring can push the rotating disk to rotate synchronously with the curved plate. After rotating ninety degrees, the rotating disk stops rotating, while the curved plate continues to rotate and compresses the reset spring. At this time, the worm gear groove on the surface of the curved plate is disengaged from the worm. Even if the worm continues to rotate, the valve stem fixed to the rotating disk will not continue to rotate, thereby ensuring the accuracy of the valve stem rotation angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a half-section schematic diagram of the overall structure of the utility model;

[0020] Figure 3 This is an exploded schematic diagram of the worm and handwheel structure of the utility model;

[0021] Figure 4 This is an exploded schematic diagram of the rotating disk and arc-shaped plate structure of the utility model.

[0022] In the figure: 1. Housing; 2. Rotating disk; 21. Limiting slide; 22. Receiving groove; 3. Valve stem; 4. Arc plate; 41. Limiting slider; 42. Return spring; 5. Worm; 51. Polygonal slot; 6. Support frame; 7. Sleeve; 8. Handwheel; 81. Polygonal insert; 82. Retaining ring; 83. Thrust spring; 9. Drive motor. DETAILED DESCRIPTION

[0023] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit 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 Figures 1 to 4 , the utility model provides a technical solution:

[0025] Embodiment 1, a control module for a part-rotation electric actuator, includes: a housing 1 and a worm 5 .

[0026] Specifically, the housing 1 is configured as a hollow semicircular structure, and a rotating disk 2 is rotatably mounted in the inner cavity of the housing 1. The rotating disk 2 is configured as a ninety-degree fan-shaped structure, such as Figure 2 As shown, the rotating disk 2 can rotate in the inner cavity of the housing 1, and the rotation stroke is 90 degrees. A valve stem 3 is fixedly provided at the center of the rotating disk 2, and the valve stem 3 is movably connected to the center of the housing 1. When the rotating disk 2 rotates, it can drive the valve stem 3 to rotate synchronously. The lower end of the valve stem 3 is provided with a valve core (not shown) structure known in the prior art. Therefore, when the rotating disk 2 rotates 90 degrees, the valve core can be driven to rotate 90 degrees, thereby realizing the opening and closing of the control valve core;

[0027] Secondly, a limited slot 21 is provided on the curved side wall of the rotating disk 2, and a curved plate 4 is provided on the outer side of the rotating disk 2. A limited slider 41 is fixed on the inner wall of the curved plate 4. The limited slider 41 is slidably installed in the inner cavity of the limited slot 21. Both ends of the limited slider 41 are fixed with a return spring 42. Figure 4 As shown, when the arc-shaped plate 4 rotates around the center of the rotating disk 2, the limiting slider 41 cooperates with the return spring 42 to push the rotating disk 2 to rotate synchronously. When the rotating disk 2 rotates 90 degrees, it cannot rotate further. At this time, the arc-shaped plate 4 can continue to rotate for a certain angle until the end of the limiting slider 41 abuts against the inner wall of the end of the limiting slot 21 and increases the compression of the return spring 42.

[0028] When the worm 5 is disengaged from the worm 5, the arc plate 4 will always have a tendency to approach the worm 5. When the worm 5 is disengaged from the worm 5, the arc plate 4 will immediately re-engage with the worm 5, thereby rotating in the opposite direction.

[0029] In order to ensure that the arc plate 4 and the rotating disk 2 can slide relative to each other, the length of the limit slider 41 of the present application is less than the length of the limit slide 21, ensuring that the limit slider 41 can slide a certain distance in the inner cavity of the limit slide 21, and a receiving groove 22 is opened on the inner wall at both ends of the limit slide 21. The end of the reset spring 42 extends into the inner cavity of the receiving groove 22 and is fixedly connected to the inner wall. One end of the reset spring 42 is retracted into the inner cavity of the receiving groove 22 to avoid itself being compressed too much and causing damage.

[0030] In order to install and position the worm 5, the present application also has support frames 6 movably sleeved on the outer sides of both ends of the worm 5, and the support frames 6 are fixed to the side walls of the outer shell 1. The support frames 6 are set to position the worm 5 to ensure that the worm 5 can only rotate without position displacement. A protective cover sleeved on the outer side of the worm 5 is fixed between the two support frames 6 to prevent water and dust from entering the surface of the worm 5. In addition, a through groove is provided on the arc surface of the outer shell 1 for the worm 5 to pass through and engage with the arc plate 4.

[0031] In order to drive the worm 5 to rotate, the drive motor 9 of the present application is fixed to the side of a support frame 6, and the output shaft of the drive motor 9 is fixedly connected to one end of the worm 5. When the drive motor 9 is working, it can drive the worm 5 to rotate synchronously.

[0032] In addition, the present application also has a sleeve 7 fixedly provided in the middle of another support frame 6, the other end of the worm 5 is rotatably inserted into the inner cavity of one end of the sleeve 7 through a bearing, and the other end surface of the worm 5 is provided with a polygonal slot 51, as shown in FIG. Figure 2 and Figure 3 As shown, the sleeve 7 itself has a certain length, and the worm 5 and the sleeve 7 can only rotate relative to each other.

[0033] In order to manually control the rotation of the worm 5, the shaft of the handwheel 8 of the present application is movably inserted into the inner cavity of the other end of the sleeve 7, and a polygonal plug 81 is fixed to the end of the shaft of the handwheel 8, and the polygonal plug 81 is movably inserted into the inner cavity of the polygonal slot 51, as shown in FIG. Figure 3 As shown, when the handwheel 8 rotates, the polygonal plug 81 at the end of the shaft of the handwheel 8 can drive the worm 5 to rotate. Therefore, when the drive motor 9 of the device fails, the handwheel 8 can also be manually rotated to control the rotation of the valve stem 3. When the drive motor 9 can work normally, the shaft of the handwheel 8 can move a certain distance in the inner cavity of the sleeve 7 until the polygonal plug 81 is completely disengaged from the polygonal slot 51. At this time, the handwheel 8 will not hinder the rotation of the worm 5, and can reduce the resistance of the worm 5 when it rotates.

[0034] The worm 5 is only driven by the hand wheel 8 when it is in a state of being separated from the worm 5. When the worm 5 is in a state of being separated from the worm 5, the staff can manually drive the worm 5 to rotate by pushing the hand wheel 8 to move the polygonal plug 81 into the inner cavity of the polygonal slot 51.

[0035] Although 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 control module for a part-turn electric actuator, characterized by: include: The housing (1) is configured as a hollow semicircular structure, a rotating disk (2) is rotatably mounted in the inner cavity of the housing (1), the rotating disk (2) is configured as a ninety-degree fan-shaped structure, a valve stem (3) is fixedly provided through the center of the rotating disk (2), and the valve stem (3) is movably connected to the center of the housing (1); The arc-shaped side wall of the rotating disk (2) is provided with a limit sliding groove (21), the outer side of the rotating disk (2) is provided with an arc-shaped plate (4), the inner wall of the arc-shaped plate (4) is fixed with a limit sliding block (41), the limit sliding block (41) is slidably installed in the inner cavity of the limit sliding groove (21), and both ends of the limit sliding block (41) are fixed with a return spring (42); A worm (5) is rotatably mounted on the outer side of the arc plate (4); a worm wheel groove meshing with the worm (5) is provided on the surface of the arc plate (4); and a driving motor (9) and a hand wheel (8) are respectively provided at both ends of the worm (5).

2. The part-turn electric actuator control module according to claim 1, characterized in that: The length of the limiting slider (41) is smaller than the length of the limiting slot (21), and the inner walls at both ends of the limiting slot (21) are provided with receiving slots (22), and the end of the return spring (42) extends into the inner cavity of the receiving slot (22) and is fixedly connected to the inner wall.

3. The part-turn electric actuator control module according to claim 1, characterized in that: Support frames (6) are movably sleeved on the outer sides of both ends of the worm (5), and the support frames (6) are fixed to the side walls of the housing (1). A protective cover sleeved on the outer side of the worm (5) is fixed between the two support frames (6).

4. The part-turn electric actuator control module according to claim 3, characterized in that: The driving motor (9) is fixed to a side surface of a support frame (6), and the output shaft of the driving motor (9) is fixedly connected to one end of the worm (5).

5. The part-turn electric actuator control module according to claim 4, characterized in that: A sleeve (7) is fixedly provided in the middle of the other support frame (6), the other end of the worm (5) is rotatably inserted into the inner cavity of one end of the sleeve (7) through a bearing, and a polygonal slot (51) is provided on the other end surface of the worm (5).

6. The part-turn electric actuator control module according to claim 5, characterized in that: The rotating shaft of the hand wheel (8) is movably inserted into the inner cavity of the other end of the sleeve (7), and a polygonal plug-in block (81) is fixed to the end of the rotating shaft of the hand wheel (8), and the polygonal plug-in block (81) is movably inserted into the inner cavity of the polygonal slot (51).

7. The part-turn electric actuator control module according to claim 6, characterized in that: A retaining ring (82) is provided on the central fixed sleeve of the rotating shaft of the hand wheel (8), and a thrust spring (83) is provided on one side of the retaining ring (82). The thrust spring (83) is located in the inner cavity of the sleeve (7) and abuts against the central inner wall of the sleeve (7). The thrust spring (83) pushes the polygonal plug (81) away from the polygonal slot (51) through elastic force.

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