Limit adjusting device of pneumatic actuator
By introducing a fine-tuning bolt and a design that links the connecting arm with the lead screw in the pneumatic actuator limit device, the problem of the existing device lacking fine-tuning function is solved, precise control of valve opening and closing is achieved, the difficulty of processing and installation is reduced, and the accuracy and efficiency of the pneumatic actuator are improved.
Patent Information
- Application Number
- CN202423048861.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing pneumatic actuator limit devices lack fine-tuning capabilities, which leads to high requirements for component processing accuracy and installation personnel, increasing costs.
A limit adjustment device was designed, which contacts the micro switch on the gas on-off control valve through a fine-tuning bolt and is linked by a connecting arm and a lead screw to achieve fine-tuning of the stroke, reducing the requirements for component processing accuracy and installation.
It realizes precise adjustment of valve opening and closing control, reduces processing and installation requirements, and improves the accuracy and efficiency of pneumatic actuators.
Smart Images
Figure CN223399380U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pneumatic actuators for executing valve opening and closing, in particular to a limit adjustment device for a pneumatic actuator. Background Art
[0002] Pneumatic actuators are devices that use air pressure to open and close valves. They are typically equipped with limiters to restrict their travel, ensuring accurate valve opening and closing. However, existing limiters generally lack fine-tuning capabilities. Accurate valve opening and closing control requires high design and machining precision for the limiter's travel control components, as well as high installation requirements for on-site installers, which increases costs. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to provide a limit adjustment device for a pneumatic actuator, which can fine-tune the stroke control component in the limit device to reduce the processing accuracy requirements for the component and the installation requirements for the installer.
[0004] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a limit adjustment device for a pneumatic actuator, comprising a box body and a first gas on-off control valve and a second gas on-off control valve fixed in the box body, the first gas on-off control valve is located at the upper end of the box body, the second gas on-off control valve is located at the lower end of the box body, a connecting seat is provided in the box body, a first fine-tuning bolt and a second fine-tuning bolt are screwed on the connecting seat, the first fine-tuning bolt is used to touch the micro switch on the first gas on-off control valve, the second fine-tuning bolt is used to touch the micro switch on the second gas on-off control valve, a connecting seat moving drive mechanism is provided in the box body, and the connecting seat moving drive mechanism is synchronously linked with the main shaft in the pneumatic actuator.
[0005] Furthermore, the connecting seat moving drive mechanism includes a screw arranged in the box body, the screw is vertically arranged and rotatably connected to the box body, the connecting seat is threadedly connected to the screw, the screw is synchronously linked with the main shaft in the pneumatic actuator, a partition is fixedly arranged in the box body, a vertical guide rail groove is opened on the partition, and the connecting seat passes through the guide rail groove.
[0006] Furthermore, a first connecting arm and a second connecting arm are integrally provided on the connecting seat, and the first connecting arm and the second connecting arm are located on both sides of the guide rail groove, the first fine-tuning bolt is threadedly connected to the first connecting arm, and the second fine-tuning bolt is threadedly connected to the second connecting arm.
[0007] Furthermore, the first gas on-off control valve and the second gas on-off control valve both adopt mechanical valves with micro switches, and the mechanical valves are provided with an air inlet interface and an air outlet interface.
[0008] Compared with the prior art, the advantage of the present invention is that the limit adjustment device contacts the micro switch on the gas on-off control valve through the fine-tuning bolt, and the fine-tuning bolt is threadedly connected to the connecting arm, so that the relative position between the fine-tuning bolt and the connecting arm can be adjusted. Therefore, during the debugging stage of the limit device on the pneumatic actuator, the up and down movement stroke of the fine-tuning bolt can be fine-tuned by rotating the fine-tuning bolt, thereby making the opening and closing control of the valve more accurate, and at the same time reducing the processing accuracy requirements for transmission components such as the screw and the connecting seat and the installation requirements for the installer. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model. DETAILED DESCRIPTION
[0010] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
[0011] like Figure 1 As shown, a limit adjustment device for a pneumatic actuator includes a box body 1 and a first gas on-off control valve 2 and a second gas on-off control valve 3 fixed in the box body 1. The first gas on-off control valve 1 is located at the upper end of the box body 1, and the second gas on-off control valve 3 is located at the lower end of the box body 1. A connecting seat 4 is provided in the box body 1, and a first connecting arm 41 and a second connecting arm 42 are integrally provided on the connecting seat 4. A first fine-tuning bolt 5 is screwed on the first connecting arm 41, and a second fine-tuning bolt 6 is screwed on the second connecting arm 42. The first fine-tuning bolt 5 is used to touch the first gas on-off control valve 2. The micro switch 7 and the second fine-tuning bolt 6 are used to touch the micro switch 7 on the second gas on-off control valve 3. A connecting seat moving drive mechanism is provided in the box body 1. The connecting seat moving drive mechanism includes a screw 8 provided in the box body 1. The screw 8 is vertically provided and rotatably connected to the box body 1. The connecting seat 4 is screwed to the screw 8. The screw 8 is synchronously linked with the main shaft in the pneumatic actuator (not shown in the figure). A partition 9 is fixedly provided in the box body 1. A vertical guide rail groove 91 is opened on the partition 9. The connecting seat 4 passes through the guide rail groove 91. The first connecting arm 41 and the second connecting arm 42 are located on both sides of the guide rail groove 91.
[0012] In the above embodiment, the first gas on-off control valve 2 and the second gas on-off control valve 3 can both adopt existing mechanical valves with micro switches, and the mechanical valves are provided with an air inlet interface 10 and an air outlet interface 11, which are also the valves already equipped in the limit device on the current pneumatic actuator.
[0013] In addition, the lead screw 8 and the main shaft in the pneumatic actuator can be driven by transmission components such as a synchronous belt or a synchronous gear. The main shaft in the pneumatic actuator is used to drive the valve stem on the valve to rotate.
[0014] The working process of the limit adjustment device of the present invention is as follows: before the pneumatic actuator is put into use, during its debugging stage, the first fine-tuning bolt 5 and the second fine-tuning bolt 6 are rotated to fine-tune the up and down movement stroke of the first fine-tuning bolt 5 and the second fine-tuning bolt 6, so as to improve the control accuracy of the opening and closing of the valve; after the debugging is completed, when the valve needs to be opened, the gas source is introduced into the pneumatic actuator through the first gas on-off control valve 2, and the main shaft in the pneumatic actuator drives the valve stem to rotate to open the valve, and synchronously drives the screw 8 to rotate, and the screw 8 drives the connecting seat 4 to move upward, when the first fine-tuning bolt 5 and the micro switch 7 on the first gas on-off control valve 2 are rotated, the valve stem of the valve is rotated to open the valve, and the screw 8 drives the connecting seat 4 to move upward, and ... When touched, the first gas on-off control valve 2 is closed, that is, the air inlet interface 10 and the air outlet interface 11 are not connected, the pneumatic actuator stops intake, and the valve opening is completed; and when the valve needs to be closed, the gas source is introduced into the pneumatic actuator through the second gas on-off control valve 3, and the main shaft in the pneumatic actuator drives the valve stem of the valve to rotate in the opposite direction, and synchronously drives the screw 8 to reverse, and the screw 8 drives the connecting seat 4 to move downward. When the second fine-tuning bolt 6 touches the microswitch 7 on the second gas on-off control valve 3, the second gas on-off control valve 2 is closed, that is, the air inlet interface 10 and the air outlet interface 11 are not connected, the pneumatic actuator stops intake, and the valve closing is completed.
[0015] The protection scope of the present invention includes but is not limited to the above embodiments, and its protection scope is subject to the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field fall within the protection scope of the present invention.
Claims
1. A pneumatic actuator limit adjustment device, comprising a housing and a first gas on-off control valve and a second gas on-off control valve fixed in the housing, wherein the first gas on-off control valve is located at the upper end of the housing and the second gas on-off control valve is located at the lower end of the housing, characterized in that: A connecting seat is provided in the box body, and a first fine-tuning bolt and a second fine-tuning bolt are screwed on the connecting seat. The first fine-tuning bolt is used to touch the micro switch on the first gas on-off control valve, and the second fine-tuning bolt is used to touch the micro switch on the second gas on-off control valve. A connecting seat moving drive mechanism is provided in the box body, and the connecting seat moving drive mechanism is synchronously linked with the main shaft in the pneumatic actuator.
2. The limit adjustment device for a pneumatic actuator according to claim 1, characterized in that: The connecting seat moving drive mechanism includes a screw arranged in the box body, the screw is vertically arranged and rotatably connected to the box body, the connecting seat is threadedly connected to the screw, the screw is synchronously linked with the main shaft in the pneumatic actuator, a partition is fixedly arranged in the box body, a vertical guide rail groove is opened on the partition, and the connecting seat passes through the guide rail groove.
3. The limit adjustment device for a pneumatic actuator according to claim 2, characterized in that: The connecting seat is integrally provided with a first connecting arm and a second connecting arm, the first connecting arm and the second connecting arm are located on both sides of the guide rail groove, the first fine-tuning bolt is screwed to the first connecting arm, and the second fine-tuning bolt is screwed to the second connecting arm.
4. The limit adjustment device for a pneumatic actuator according to claim 1, characterized in that: The first gas on-off control valve and the second gas on-off control valve both adopt mechanical valves with micro switches, and the mechanical valves are provided with an air inlet interface and an air outlet interface.