Electric actuator hand wheel anti-pressing misoperation locking device
By using anti-disengagement locking pads and anti-disengagement locking pins, the problem of accidental operation of the electric actuator handwheel is solved, achieving low-cost, highly compatible protection that does not affect emergency operations and ensuring stable operation of industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NAT ENERGY TAIAN THERMAL POWER CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-21
Smart Images
Figure CN224533622U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric actuator technology in industrial systems, and specifically to a handwheel anti-misoperation locking device for electric actuators. Background Technology
[0002] Electric actuators are widely used in industrial automation control systems, often to drive equipment such as valves. The handwheel is an important component on the electric actuator used for manual operation. When the electric actuator is in automatic operation mode, if the handwheel is subjected to external force or is pressed incorrectly, it may cause the press-fit clutch to fail to disengage or engage properly.
[0003] If the clutch is not fully engaged, the electric actuator may experience gear grinding or tripping during automatic operation. If the clutch is not fully disengaged, the motor and handwheel will be subjected to force simultaneously, which can damage the gears. In addition, accidentally pressing the handwheel in automatic mode can cause the actuator to become unusable remotely, affecting the automatic adjustment and control function. In severe cases, it can cause deviations in industrial system parameters or even shutdown, posing a great hidden danger to industrial production.
[0004] Currently, the industry mainly adopts two solutions to the above problems: one is to install a protective cover to prevent the handwheel from being pressed down. However, due to the large number of electric actuator models and sizes, protective covers need to be processed separately for different models and sizes of actuators, which is a complicated process and has a high overall investment cost. The other is to directly remove the handwheel. Although this method can temporarily prevent the handwheel from being pressed down and accidentally operated, when the electric actuator malfunctions and requires emergency manual operation, it will be impossible to operate in time due to the lack of a handwheel, which will cause great inconvenience to actual operation.
[0005] Therefore, there is an urgent need for a low-cost, highly compatible device that does not affect emergency manual operation to solve the problem of electric actuator handwheels being accidentally pressed by external forces. Utility Model Content
[0006] The purpose of this utility model is to provide a locking device for preventing accidental operation of the handwheel under pressure in electric actuators.
[0007] To achieve the above objectives, this utility model provides the following technical solution: An anti-accidental locking device for handwheel of electric actuator includes an anti-disengagement locking pad and an anti-disengagement locking pin.
[0008] Anti-disengagement locking pad: The pad has anti-disengagement locking pin positioning holes. Its size needs to be adapted and processed according to the pressure gap of the handwheel of the specific electric actuator and the diameter of the handwheel shaft to ensure that the pad can be accurately installed at the pressure gap position of the handwheel and is tightly attached to the handwheel and the electric actuator body respectively, thereby preventing the handwheel from being pressed down by external force.
[0009] Anti-disengagement pin: The diameter of the anti-disengagement pin is matched with the diameter of the anti-disengagement pin positioning hole. When in use, the anti-disengagement pin passes through the positioning hole to stably fix the anti-disengagement locking pad on the electric actuator, preventing the pad from loosening or falling off during use.
[0010] In addition, the materials of the anti-loosening locking pad and the anti-loosening locking pin are not limited. They can be flexibly selected according to the actual use scenario and the requirements for strength, wear resistance, corrosion resistance, etc., such as metal materials, high-strength engineering plastics, etc., as long as they can meet the strength and stability requirements of the device.
[0011] The beneficial effects of this utility model are as follows: This device precisely fills the handwheel pressure gap with anti-disengagement locking pads, effectively preventing the handwheel from being pressed down by external force. This avoids problems such as gear damage, inability to operate the actuator remotely, and failure of automatic adjustment and control functions caused by improper clutch disengagement or engagement, thus preventing deviations in industrial system parameters or even machine shutdowns and ensuring stable industrial production. There is no need to design complex protective covers for different models of electric actuators; only anti-disengagement locking pads adapted to the handwheel's parameters need to be machined. The manufacturing process is simple, greatly reducing equipment costs. By adjusting the size of the anti-disengagement locking pads, it can be adapted to various imported (such as SIPOS type) and domestic electric actuators with handwheel operating devices without significant modifications to the electric actuator itself, making it widely applicable. Unlike methods that require removing the handwheel, this device provides protection during normal use. When the electric actuator malfunctions and requires emergency manual operation, simply remove the anti-disengagement locking pin and anti-disengagement locking pads to operate the handwheel normally. Operation is convenient and does not hinder emergency handling.
[0012] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of an anti-accidental operation locking device for the handwheel of an electric actuator, as shown in this utility model. Figure 2 This is a reference diagram showing the combined state of an anti-accidental operation locking device for the handwheel of an electric actuator, as illustrated in this utility model. Detailed Implementation
[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0017] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0018] like Figure 1 As shown, this utility model provides a locking device for preventing accidental operation of the handwheel under pressure in an electric actuator, including an anti-disengagement locking pad 1 and an anti-disengagement locking pin 2.
[0019] Anti-disengagement locking pad 1: The pad has an anti-disengagement locking pin positioning hole 3. Its size needs to be adapted and processed according to the pressing gap of the handwheel of the specific electric actuator and the diameter of the handwheel shaft to ensure that the anti-disengagement locking pad 1 can be accurately installed at the pressure gap position of the handwheel and is tightly attached to the handwheel and the electric actuator body respectively, thereby preventing the handwheel from being pressed down by external force.
[0020] Anti-disengagement pin 2: The diameter of anti-disengagement pin 2 is matched with the diameter of anti-disengagement pin positioning hole 3. When in use, anti-disengagement pin 2 passes through anti-disengagement pin positioning hole 3 to stably fix anti-disengagement locking pad 1 on electric actuator, preventing anti-disengagement locking pad 1 from loosening or falling off during use.
[0021] In addition, the materials of the anti-loosening locking pad 1 and the anti-loosening locking pin 2 are not limited. They can be flexibly selected according to the actual use scenario and the requirements for strength, wear resistance, corrosion resistance, etc., such as metal materials, high-strength engineering plastics, etc., as long as they can meet the strength and stability requirements of the device.
[0022] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0023] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A locking device for preventing accidental operation of a handwheel under pressure in an electric actuator, characterized in that, It includes an anti-disengagement locking pad and an anti-disengagement locking pin; the anti-disengagement locking pad has an anti-disengagement locking pin positioning hole; the size of the anti-disengagement locking pad is adapted to the pressure gap of the electric actuator handwheel and the diameter of the handwheel shaft; the anti-disengagement locking pin passes through the anti-disengagement locking pin positioning hole, fixing the anti-disengagement locking pad at the pressure gap position of the electric actuator handwheel, and the anti-disengagement locking pad is tightly attached to both the handwheel and the electric actuator body.
2. The anti-accidental operation locking device for the handwheel of an electric actuator according to claim 1, characterized in that, The diameter of the anti-loosening pin positioning hole is adapted to the diameter of the anti-loosening pin.