一种气动调节阀
By using a non-rigid connection of linkage components and spring structure, the wear and maintenance problems caused by direct connection between actuator and valve stem are solved, achieving stable valve operation and low-cost production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-17
AI Technical Summary
In existing sleeve-type control valves, the direct connection between the actuator and the valve stem leads to wear, high production costs, and difficulty in replacement and maintenance. Furthermore, the strict requirements on the stroke can easily cause valve seat deformation or breakdown.
The actuator and valve stem are connected by a linkage, including the first and second connecting parts and the piston plate. The non-rigid connection is achieved through the sliding and spring structure in the piston chamber, which avoids excessive compression.
It reduces valve stem wear, lowers production costs and maintenance difficulty, ensures stable valve opening and closing, and improves system stability and convenience.
Smart Images
Figure CN224516097U_ABST
Abstract
Claims
1. A pneumatic control valve characterized by: It includes a valve body (6) and a valve stem (3) mounted on the valve body (6); the valve body (6) is also provided with a support frame (1), and an actuator (7) is mounted on the support frame (1); The actuator (7) is also provided with a push rod (2); the push rod (2) is connected to the valve stem (3) through a linkage (5); The linkage (5) includes a first connecting part (50) connected to the valve stem (3) and a second connecting part (55) connected to the push rod (2); the second connecting part (55) slides in the piston chamber (56) provided on the first connecting part (50) via a piston plate (57); The linkage component (5) also includes a connecting rod (52), and there are two connecting rods (52), which are symmetrically arranged on both sides of the first connecting part (50); One end of the connecting rod (52) passes through the first connecting part (50) and is connected to the piston plate (57), and the other end of the connecting rod (52) is provided with a limiting part (514), which prevents the piston plate (57) from separating from the piston cavity (56).
2. A pneumatic control valve according to claim 1, characterised in that: The piston chamber (56) is also provided with a spring (53), and the piston plate (57) is moved toward the actuator (7) by the spring (53).
3. A pneumatic control valve according to claim 2, characterised in that: The second connecting part (55) is also provided with a mounting hole (511), and one end of the spring (53) is located in the mounting hole (511).
4. A pneumatic control valve according to claim 1 or 2 or 3, characterised in that: The first connecting part (50) is threadedly engaged with the valve stem (3) through the provided first connecting hole (51), and the second connecting part (55) is threadedly engaged with the push rod (2) through the provided second connecting hole (54).
5. A pneumatic control valve according to claim 4, characterised in that: The connecting rod (52) is connected to the internal threaded hole (58) on the piston plate (57) through the external threaded part (512), and the outer wall surface of the connecting rod (52) is a smooth rod, and slides along the through hole (513) on the first connecting part (50).
6. A pneumatic control valve according to claim 5, characterised in that: The support frame (1) is also provided with a pointer (4), and the outer wall surface of the first connecting part (50) is also provided with a plane (510), and the plane (510) is also provided with a scale value (59) in millimeters.