Novel pilot-operated type sleeve adjusting valve

Abstract

The invention relates to a novel pilot-operated type sleeve adjusting valve which comprises a valve body, a valve element assembly, a valve cover, a valve rod, an electric executor and the like. Whenthe opening degree of the valve is within the stroke range of a small valve element, the small valve element achieves the adjusting function, and a large valve element still keeps the closed state; and after the opening degree reaches the stroke final position of the small valve element, the large valve element is opened, and flow adjustment of a master valve is started. According to the pilot-operated type sleeve adjusting valve, on the premise of guaranteeing the original flow characteristic, more precise flow adjustment can be achieved in the small opening degree, and the large adjustable ratio is achieved. Meanwhile, in the process of opening the small valve element, a small sleeve of a small hole punching structure can prevent blocking flow from being generated, and vibration and noise generated by the valve can be controlled. The pilot-operated type sleeve adjusting valve has the beneficial effects of being simple in operation, convenient to mount, safe, reliable and the like.

Description

technical field [0001] The invention relates to a sleeve regulating valve, in particular to a novel pilot-operated sleeve regulating valve. Background technique [0002] With the increasing degree of automation in the industrial field, regulating valves play an increasingly important role in the automatic control system of modern factories, especially sleeve regulating valves, because of their small unbalanced force, large allowable pressure difference, stable operation, etc. Advantages, but also by more and more enterprises of all ages. Conventional control valves have a turndown ratio of 30:1 or 50:1. When the opening is small, most of the regulating valves on the market, especially the regulating valves with linear flow characteristics, cannot achieve accurate flow regulation. In the face of the current market, regulating valves need to face a variety of special working conditions, of which the above-mentioned situations naturally exist. [0003] Therefore, it is very ...

AI Technical Summary

Problems solved by technology

When the opening is small, most of the regulating valves on the market, especially the regulating valves with linear flow characteristics, cannot achieve accurate flow regulation.

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