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High-precision micro-flow adjusting valve

A technology of micro-flow and regulating valves, which is applied in the direction of valve lifts, valve details, valve devices, etc., and can solve the problems of limited minimum flow range of the target medium and low control precision.

Pending Publication Date: 2021-09-24
上海猛轼流体机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing flow control valves are generally driven by manual or electromagnetic coils. The minimum flow range of the target medium is limited, generally at the SLM (standard liters per minute) level, and the control accuracy is 1% or lower.

Method used

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a ...

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Abstract

The invention discloses a high-precision micro-flow adjusting valve which comprises a shell. The shell is of a hollow cylindrical structure, one end of the shell is connected with a valve seat, a rod-shaped part of the valve seat is tightly attached to the wall face of the shell, a through hole is formed in the rod-shaped part of the valve seat, and a locking nut is connected with the shell through threads and tightly attached to the valve seat. A cylindrical piezoelectric ceramic stack is placed and assembled in the shell, one end of the piezoelectric ceramic stack is attached to the inner wall of the shell, the other end of the piezoelectric ceramic stack is attached to the end face of a circular plate-shaped structure of a flat spring valve rod, a rod-shaped structure is arranged in the middle of the flat spring valve rod, and the circular plate-shaped structure is arranged at one end of the flat spring valve rod. The rod-shaped part of the valve seat and the rod-shaped part of the flat spring valve rod are attached and pressed to achieve sealing, and a medium inlet is connected with one end of the shell. The micro-flow adjusting valve has the beneficial effects that the piezoelectric ceramic control deformation is 0-20 microns, micro-flow adjustment becomes possible through micron-sized deformation, and 0.5% control precision of the valve is achieved.

Description

technical field [0001] The invention belongs to a flow regulating valve, in particular to a controllable and adjustable high-precision micro flow valve. Background technique [0002] There are many gas flow regulating valves, the main function of which is to control and adjust the flow of medium gas. To achieve this purpose, the flow regulating valve is generally designed as a valve stem valve seat switch type, and various driving technologies are used to realize different openings of the valve stem valve seat. Thereby realizing gas flow regulation. [0003] High-precision and extremely small flow controllability of media is the development direction of regulating valves. At present, the existing flow control valves are generally adjusted manually or driven by electromagnetic coils. The minimum flow range of the target medium is limited, generally at the SLM (standard liters per minute) level, and the control accuracy is 1% or lower. Contents of the invention [0004] Th...

Claims

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Application Information

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IPC IPC(8): F16K31/00F16K1/36F16K1/42F16K1/00
CPCF16K31/007F16K1/36F16K1/42F16K1/427F16K1/00
Inventor 李强
Owner 上海猛轼流体机械有限公司
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