Electric actuator with reset mechanism

Abstract

The utility model discloses an electric actuator with a reset mechanism, which belongs to the technical field of electric actuators, and comprises a valve pipe mechanism and a return mechanism, a valve core mechanism used for stopping or conducting gas and liquid is arranged in the valve pipe mechanism, and the return mechanism is arranged in the valve pipe mechanism. And a connecting mechanism for connecting parts is arranged at the top end of the valve pipe mechanism. Through the arrangement of the valve element mechanism, the connecting mechanism and the return mechanism, the power-off reset of the device can be achieved without a power-off detection mechanism, an industrial control computer and other modules, the structure is simple, the cost is low, and the practicability of the device can be improved. The torque of the device is effectively improved, step loss of the motor can be prevented, the execution precision of the device is improved, the torque output by the device can be kept constant, and the execution precision of the device is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric actuator technical field, in particular to a kind of electric actuator with reset mechanism. BACKGROUND

[0002] Electric actuator is the device that electric energy is converted into mechanical movement, to control equipment, it is composed of motor, transmission mechanism, control system etc., when working, electric actuator receives electric signal, motor rotates, and rotates movement is changed into linear or rotation movement by transmission mechanism, drives the action of connected equipment, in order to ensure that equipment returns to safe initial state when power off, avoid accident, guarantee system safety, stable and subsequent maintenance and overhaul convenient, some electric actuator will be equipped with power-off reset mechanism.

[0003] The existing electric actuator with power-off reset function, its power-off reset mechanism is mainly composed of power-off detection module, processing module, power storage module etc., its principle is that power-off detection module detects whether equipment is powered off, when equipment is powered off, power-off detection module sends information to processing module, and processing module controls electric actuator to reset, and power storage module supplies power to power-off detection module, processing module and electric actuator body during reset process, although this electric actuator can realize power-off reset, but its structure is complex, and more electronic equipment is needed, so its cost is higher, when component fails or is damaged, it is more complex to repair, and the cost generated by replacing component is higher, in addition, wiring needs to be carried out to multiple modules during installation, and its installation is more troublesome.

[0004] Therefore, it is urgent to provide an electric actuator with reset mechanism to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem in overcoming the above-mentioned prior art's shortcomings, and provides an electric actuator with reset mechanism.

[0006] To solve the above technical problems, one technical scheme of the utility model is to provide an electric actuator with reset mechanism, which comprises a valve pipe mechanism and a reset mechanism.

[0007] The valve core mechanism is provided with a reset mechanism.

[0008] The top end of the connecting mechanism is provided with a driving mechanism for providing power and controlling the valve core mechanism.

[0009] The utility model further sets up: the valve pipe mechanism includes the pipe body, both ends of pipe body all are provided with the joint, the top wall of pipe body is opened with the round hole, the inside top of pipe body is fixed with two block one, the inside bottom of pipe body is fixed with two block two.

[0010] Through the above technical scheme, the pipe body and the joint are all stainless steel materials, the device can be installed on the pipeline through the joint, the block one is arc-shaped, and the spacing thereof in the axial direction of the pipe body is equal to the thickness of the valve piece, and the block two has equal spacing in the axial and radial directions, which is equal to the thickness of the valve piece.

[0011] The utility model further sets up: the valve core mechanism includes the valve piece that rotates to set in the pipe body, the top of valve piece is fixed with the rotary lever, the rotary lever is fixed with reset lever, the end of reset lever is fixed with the connecting ring.

[0012] Through the above technical scheme, when the valve piece is closed, the two surfaces of the valve piece are in contact with the two block one respectively, when the valve piece is opened by ninety degrees, the two surfaces of the valve piece are in contact with the two block two respectively, the block one can limit the valve piece in the clockwise direction, to avoid the valve piece from rotating excessively in the clockwise direction when closing, and the block two can limit the valve piece in the counterclockwise direction, to avoid the valve piece from rotating excessively in the counterclockwise direction when opening.

[0013] The utility model further sets up: the connecting mechanism includes the connecting sleeve fixed in the top of pipe body, the slot is opened on the connecting sleeve.

[0014] Through the above technical scheme, the reset lever on the rotary lever is connected with the connecting sleeve, and the reset lever extends out of the slot, the slot is arc-shaped, and the central angle thereof is greater than ninety degrees.

[0015] The utility model further sets up: the top of connecting sleeve is fixed with the connecting plate, the ear one is fixed on the connecting plate, and the ear two is also fixed on the connecting plate.

[0016] Through the above technical scheme, the ear one and the ear two are annularly distributed with the central axis of the connecting sleeve as the axis, and the central angle of the ear one and the ear two is ninety degrees.

[0017] The utility model further sets up: the reset mechanism includes the buckle ring connected to the connecting ring, the pull spring is welded on the buckle ring, and the hook is arranged on one end of the pull spring.

[0018] With the above technical solution, when the hook is attached to the second hook, if the device is powered off, the rotating rod loses power, and the tension spring can pull the reset rod, causing the reset rod to rotate towards the second hook. This causes the rotating rod and valve plate to rotate clockwise, closing the valve plate. Thus, the valve plate can automatically reset to the closed state when the device is powered off. The user can also remove the hook from the second hook and attach it to the first hook. In this case, the tension of the spring is in the opposite direction. When the device is powered off, the valve plate will rotate clockwise and be blocked by the second stop when it rotates to be perpendicular to the pipe body, thus resetting the device to the open state. Through the above structure, the device can reset to the specified state when powered off, thereby avoiding excessive medium pressure or medium loss when powered off.

[0019] The present invention is further configured such that: the driving mechanism includes a reducer installed on the top of the connecting plate, a stepper motor is installed on the top of the reducer, and a closed-loop controller is installed on the stepper motor.

[0020] Through the above technical solution, the reducer can decelerate the stepper motor, thereby increasing the torque of the device. The output shaft of the reducer is connected to the rotating rod, and the torque of its output shaft after deceleration is significantly greater than the tension of the tension spring, thus avoiding the influence of the tension spring on the operation of the device when the power is not cut off. The closed-loop controller can detect the rotation angle and torque of the stepper motor, and change the input current of the stepper motor according to the rotation angle and torque of the stepper motor, thereby avoiding the stepper motor from losing steps. It can also apply a constant torque to the rotating rod when the stepper motor starts.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. This utility model, through the setting of valve core mechanism, connecting mechanism and return mechanism, enables the device to achieve power failure reset without power failure detection mechanism and industrial control computer modules. Its structure is simple and low cost, which helps to improve the practicality of the device.

[0023] 2. By setting up a drive mechanism, this utility model effectively improves the torque of the device, prevents the motor from losing steps, thereby improving the execution accuracy of the device, and also keeps the output torque constant, thereby further improving the execution accuracy of the device. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a structural diagram of the valve tube mechanism of this utility model;

[0026] Figure 3 This is a structural diagram of the valve core mechanism of this utility model;

[0027] Figure 4 This is a structural diagram of the connection mechanism of this utility model;

[0028] Figure 5 This is a structural diagram of the return mechanism of this utility model;

[0029] Figure 6 This is a structural diagram of the drive mechanism of this utility model.

[0030] In the diagram: 1. Valve pipe mechanism; 101. Pipe body; 102. Connector; 103. Circular hole; 104. Stop block one; 105. Stop block two; 2. Valve core mechanism; 201. Valve plate; 202. Rotating rod; 203. Reset rod; 204. Connecting ring; 3. Connecting mechanism; 301. Connecting sleeve; 302. Groove; 303. Connecting plate; 304. Hanging ear one; 305. Hanging ear two; 4. Return mechanism; 401. Buckle ring; 402. Tension spring; 403. Hook; 5. Drive mechanism; 501. Reducer; 502. Stepper motor; 503. Closed-loop controller. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0032] Please see Figures 1-6 An electric actuator with a reset mechanism includes a valve tube mechanism 1 and a return mechanism 4. The valve tube mechanism 1 includes a tube body 101, with connectors 102 at both ends of the tube body 101. A circular hole 103 is opened on the top wall of the tube body 101. Two first blocks 104 are fixed at the top inside the tube body 101, and two second blocks 105 are fixed at the bottom inside the tube body 101. The tube body 101 and the connectors 102 are both made of stainless steel. The device can be installed on a pipeline through the connectors 102. The first blocks 104 are arc-shaped, and their axial spacing in the tube body 101 is equal to the thickness of the valve plate 201. The second blocks 105 have axial and radial spacings equal to the thickness of the valve plate 201.

[0033] like Figures 1-3As shown, the valve tube mechanism 1 is internally equipped with a valve core mechanism 2 for shutting off or opening gas and liquid. The valve core mechanism 2 includes a valve plate 201 rotatably disposed inside the tube body 101. A rotating rod 202 is fixed to the top of the valve plate 201, and a reset rod 203 is fixed to the rotating rod 202. A connecting ring 204 is fixed to the end of the reset rod 203. When the valve plate 201 is closed, both sides of the valve plate 201 are in contact with two stops 104 respectively. When the valve plate 201 is rotated 90 degrees to open, both sides of the valve plate 201 are in contact with two stops 205 respectively. Stop 104 can limit the valve plate 201 in the clockwise direction to prevent the valve plate 201 from rotating excessively in the clockwise direction when closed. Stop 205 can limit the valve plate 201 in the counterclockwise direction to prevent the valve plate 201 from rotating excessively in the counterclockwise direction when open.

[0034] like Figure 1 and Figure 4 As shown, the valve pipe mechanism 1 is provided with a connecting mechanism 3 for connecting components at its top end. The connecting mechanism 3 includes a connecting sleeve 301 fixed to the top end of the pipe body 101. The connecting sleeve 301 has a slot 302. The top end of the connecting sleeve 301 is fixed with a connecting plate 303. The connecting plate 303 is fixed with a first hanging ear 304 and a second hanging ear 305. The rotating rod 202 is rotatably connected to the connecting sleeve 301. The reset rod 203 on the rotating rod 202 extends out from the slot 302. The slot 302 is arc-shaped with a central angle greater than 90 degrees. The first hanging ear 304 and the second hanging ear 305 are arranged in a ring around the central axis of the connecting sleeve 301, and the central angle between the first hanging ear 304 and the second hanging ear 305 is 90 degrees.

[0035] like Figure 1 and Figure 5 As shown, the valve core mechanism 2 is equipped with a return mechanism 4. The return mechanism 4 includes a retaining ring 401 that is connected to the connecting ring 204. A tension spring 402 is welded to the retaining ring 401. One end of the tension spring 402 is provided with a hook 403. When the hook 403 is hooked on the second hook ear 305, if the device is de-energized, the rotating rod 202 loses power, and the tension spring 402 can pull the return rod 203, causing the return rod 203 to rotate towards the second hook ear 305, thereby driving the rotating rod 202 and the valve plate 201 to rotate clockwise, causing the valve plate 201 to close. This allows the valve plate 201 to automatically reset to the closed state when the device is powered off. The user can also remove the hook 403 from the second hook 305 and hook it onto the first hook 304. At this time, the tension of the tension spring 402 is opposite to that before. When the device is powered off, the valve plate 201 will rotate clockwise and be blocked by the second stop 105 when it rotates to be perpendicular to the pipe body 101, thereby resetting the device to the open state. Through the above structure, the device can reset to the specified state when the power is off, thereby avoiding excessive medium pressure or medium loss when the power is off.

[0036] like Figure 1 and Figure 6 As shown, the top of the connecting mechanism 3 is provided with a drive mechanism 5 for providing power and controlling the valve core mechanism 2. The drive mechanism 5 includes a reducer 501 mounted on the top of the connecting plate 303. A stepper motor 502 is mounted on the top of the reducer 501. A closed-loop controller 503 is mounted on the stepper motor 502. The reducer 501 can reduce the speed of the stepper motor 502, thereby increasing the torque of the device. The output shaft of the reducer 501 is connected to the rotating rod 202. After the reducer 501 reduces speed, the torque of its output shaft is significantly greater than the tension of the tension spring 402, thereby preventing the device from being affected by the tension spring 402 when the power is not off. The closed-loop controller 503 can detect the rotation angle and torque of the stepper motor 502, and change the input current of the stepper motor 502 according to the rotation angle and torque of the stepper motor 502, thereby preventing the stepper motor 502 from losing steps. It can also apply a constant torque to the rotating rod 202 when the stepper motor 502 starts.

[0037] When using this utility model, the operator first installs the valve pipe mechanism 1 in the pipeline. The stepper motor 502 can be controlled to rotate forward or backward by switching the stepper motor 502. When the stepper motor 502 rotates forward or backward, the torque output by it is reduced by the reducer 501 and can drive the valve plate 201 to open or close, thereby realizing electric actuation. When the device is powered off, the return mechanism 4 can reset the valve plate 201 to open or reset to closed, thereby avoiding excessive medium pressure or medium loss when the power is off.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An electric actuator with a return mechanism, comprising a valve tube mechanism (1) and a return mechanism (4), characterized in that: The valve pipe mechanism (1) is internally provided with a valve core mechanism (2) for cutting off or conducting gas and liquid, and the top end of the valve pipe mechanism (1) is provided with a connecting mechanism (3) for connecting components; The valve core mechanism (2) is provided with a return mechanism (4); The top end of the connecting mechanism (3) is provided with a driving mechanism (5) for providing power and controlling the valve core mechanism (2).

2. An electric actuator with a reset mechanism according to claim 1, characterized in that: The valve pipe mechanism (1) comprises a pipe body (101), both ends of the pipe body (101) are provided with joints (102), the top wall of the pipe body (101) is provided with a round hole (103), the inner top end of the pipe body (101) is fixedly provided with two stop blocks one (104), and the inner bottom end of the pipe body (101) is fixedly provided with two stop blocks two (105).

3. An electric actuator with a reset mechanism according to claim 2, characterized in that: The valve core mechanism (2) comprises a valve piece (201) rotatably arranged in the pipe body (101), the top end of the valve piece (201) is fixedly provided with a rotating rod (202), the rotating rod (202) is fixedly provided with a reset rod (203), and the distal end of the reset rod (203) is fixedly provided with a connecting ring (204).

4. An electric actuator with a reset mechanism according to claim 2, characterized in that: The connecting mechanism (3) comprises a connecting sleeve (301) fixedly arranged at the top end of the pipe body (101), and the connecting sleeve (301) is provided with a slot (302).

5. An electric actuator with a reset mechanism according to claim 4, characterized in that: The top end of the connecting sleeve (301) is fixedly provided with a connecting plate (303), the connecting plate (303) is fixedly provided with a hanging ear one (304), and the connecting plate (303) is also fixedly provided with a hanging ear two (305).

6. An electric actuator with a reset mechanism according to claim 3, characterized in that: The return mechanism (4) comprises a buckle ring (401) buckled to the connecting ring (204), the buckle ring (401) is welded with a tension spring (402), and one end of the tension spring (402) is provided with a buckle (403).

7. An electric actuator with a reset mechanism according to claim 5, characterized in that: The driving mechanism (5) comprises a speed reducer (501) installed at the top end of the connecting plate (303), the top end of the speed reducer (501) is installed with a stepping motor (502), and the stepping motor (502) is installed with a closed-loop controller (503).

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