一种精密流量控制用气动阀门
By introducing graphite rings and multi-layer composite sealing rings into the pneumatic valve, the problems of inaccurate flow control and leakage in traditional pneumatic valves under frequent adjustment and harsh operating conditions are solved, achieving high-precision, stable and reliable flow regulation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HUILANG MASCH TECH CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional pneumatic valves have shortcomings in terms of flow control accuracy and stability. In particular, under conditions of frequent adjustment or long-term continuous operation, they are prone to wear and gaps, which can lead to inaccurate flow control and potential safety issues such as leakage.
A pneumatic valve for precision flow control was designed, which uses a graphite ring in the stabilizing mechanism to provide low-friction support, combined with a multi-layer composite sealing ring to ensure smooth rotation and sealing of the rotating rod. This includes precise positioning of the hollow sleeve and hollow tube, additional support for the support rod, linear motion torque transmission of the connecting parts, and dynamic sealing of the annular sealing groove.
It improves the flow control accuracy, stability and sealing reliability of valves under high-frequency regulation or harsh operating conditions, reduces wear and leakage risks, and improves the service life and safety of valves.
Smart Images
Figure CN224516094U_ABST
Abstract
Claims
1. A pneumatic valve for precision flow control, comprising a fixed frame (1), and a cylinder (10) is provided on the fixed frame (1). A push rod (11) is fixedly provided at the output end of the cylinder (10), and a connector (12) is hinged to the push rod (11). A rotating rod (13) is provided at the end of the connector (12) away from the push rod (11), and a piston disc (14) is fixedly provided on the rotating rod (13). A fixed shell (15) is provided on the outer side of the piston disc (14), and the fixed shell (15) is connected to an external pipeline. characterized in that Also includes: A stabilizing mechanism (2) is provided on the fixed shell (15), and the stabilizing mechanism (2) is used to maintain the stability of the rotating rod (13) when it rotates. The stabilizing mechanism (2) includes a hollow sleeve (20) fixedly connected to the fixed shell (15), and a graphite ring (21) is provided on the inner side of the hollow sleeve (20). A hollow tube (22) is provided on the inner side of the graphite ring (21), and the hollow tube (22) is rotatably connected to the rotating rod (13).
2. The pneumatic valve for precision flow control according to claim 1, characterized in that: The top surface of the hollow sleeve (20) is integrally provided with a lower connecting sleeve (23), and the outer side of the hollow tube (22) is fixedly provided with an upper connecting sleeve (24). The upper connecting sleeve (24) and the lower connecting sleeve (23) cooperate to connect the hollow sleeve (20) and the hollow tube (22).
3. The precision flow control pneumatic valve of claim 1, wherein: A stabilizing sleeve (17) is fixedly installed on the fixed shell (15). A support rod (16) is rotatably installed on the inner side of the stabilizing sleeve (17). The end of the support rod (16) away from the stabilizing sleeve (17) passes through the fixed shell (15) and is fixedly connected to the piston disc (14).
4. The precision flow control pneumatic valve of claim 1, wherein: The connector (12) includes a fixing plate (120), on which a slide rod (121) is rotatably mounted, and the slide rod (121) is fixedly connected to the push rod (11).
5. The precision flow control pneumatic valve of claim 4, wherein: The connector (12) has a slot (122) and the slot (122) is fixedly connected to the rotating rod (13).
6. The precision flow control pneumatic valve of claim 1, wherein: An annular sealing groove (220) is provided on the contact surface between the hollow tube (22) and the rotating rod (13), and a sealing ring (221) is embedded in the annular sealing groove (220).
7. The precision flow control pneumatic valve of claim 6, wherein: The sealing ring (221) comprises a corrosion-resistant polymer layer near the fluid side, a graphite-filled layer in the middle, and an elastic support layer on the outside.
8. The precision flow control pneumatic valve of claim 7, wherein: The elastic support layer is made of fluororubber.