Butterfly valve core and butterfly valve thereof

Abstract

A novel butterfly spool comprises a valve block. The spin axis of the above butterfly spool through the valve block centre makes a certain dip angle with the plane of the valve block. On one or two sides of the valve block center makes a certain dip angle with the plane of the value block. On one or two sides of the value block plate face are disposed one or more pieces of auxiliary blocks. The spool corner and the through flow have an approximate linear or square linear relation, and then have a simple quantizing relation, in order to control flow change of the value. The present invention also provide a butterfly value using the above spool.

Description

technical field [0001] The invention relates to valve body technology, in particular to a novel butterfly valve core which can control the valve body of a butterfly valve core so that the passing flow and the rotation angle of the butterfly valve core have an approximate linear or square linear relationship, and the application of the valve core A new type of butterfly valve that can quickly, stably and accurately control the flow through the valve. Background technique [0002] At present, the valve body of the existing butterfly valve core, such as a butterfly valve, is generally composed of a housing, a butterfly valve plate, a rotating shaft assembly and its operating mechanism. Among them, the operating mechanism changes the resistance characteristics or flow coefficient of the valve by adjusting the rotation angle of the valve plate, so that the flow through the valve changes accordingly to achieve the purpose of controlling the flow parameters in the pipeline or passa...

AI Technical Summary

Problems solved by technology

There is a complex curve relationship between the flow rate of the valve (hereinafter referred to as the flow rate) and the rotation angle of the valve plate. The change of rotation angle has little effect on the flow through the valve, but it will cause a large change in the flow at the end of the process; and vice versa

[0004] Obviously, although the flow control adjustment method of ordinary butterfly valves is simple, due to the complex curve relationship between the passing flow and the valve disc rotation angle, the passing flow cannot be adjusted uniformly and accurately. The area is carried out, because the closer to the fully closed position, the adjustment range of the flow is larger, making the adjustment and control of the flow very unstable

[0005] Especially for butterfly valves equipped with automatic control equipment, the automatic control equipment generally does not have a rotation angle detection device (or function), such as the corresponding relationship between the adjustment amount of the rotation angle of the valve plate at each position and the adjustment amount of the flow rate According to the simple linear relationship, it is easy to cause problems such as long adjustment time and unstable adjustment.

In order to solve this problem, some manufacturers have added complex intelligent control mechanisms or control programs to the valve, as well as the corresponding transmission system, but this has greatly increased the cost, size and weight of the valve control part and the corresponding maintenance difficulty

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