Champagne tower multi-stage throttle control valve

Abstract

The invention relates to the field of valves, in particular to a champagne tower type multi-stage throttling control valve that can be applied to high-pressure differential media for noise reduction and cavitation damage resistance. The invention includes a valve body, a valve cover, a throttle sleeve and a valve core; the cavity of the throttle sleeve is in the shape of a stepped hole with more than two layers, and the shape of the valve core is a stepped shaft coaxial with the throttle sleeve with more than two layers shape, and the number of shoulders at the spool is less than or equal to the number of shoulders in the cavity of the throttle sleeve, so that each set of shoulders at the valve core in the axial direction can form a sealing surface with the corresponding shoulder at the corresponding throttle sleeve; The hole shoulder of the throttling sleeve and / or the shaft shoulder of the valve core are provided with flow channel grooves axially or obliquely. The invention has a compact and simple structure and high operational reliability. It can not only effectively reduce noise and resist cavitation damage, but also further reduce the processing difficulty and cost of the valve, and is especially suitable for use under the control conditions of high-pressure differential media. .

Description

technical field [0001] The invention relates to the field of valves, in particular to a champagne tower type multi-stage throttling control valve that can be applied to high-pressure differential media for noise reduction and cavitation damage resistance. Background technique [0002] Multi-stage throttling control valve is the most important link in automation control, its reliability and adjustment accuracy will affect the safety and quality of system automation operation. With the continuous development of the process industry, there are more and more working conditions that require high pressure differential control of the medium in the process. The large pressure differential of the medium is prone to vibration, noise, cavitation damage, etc., resulting in multi-level throttling control. Severe damage to valve trim. [0003] In the prior art, the multi-stage throttling control valve mainly has two structural forms, that is, a multi-stage sleeve-type regulating valve or...

AI Technical Summary

Problems solved by technology

Although the above-mentioned traditional multi-stage pressure reducing regulating valve can play a certain degree of throttling control function, there are also the following problems: for the multi-stage sleeve type regulating valve, due to the limitation of its own structure size, only a relatively small number of valves can be installed. Step-down series, cannot be applied to complex throttling occasions

For the labyrinth multi-stage control valve, the opposite is true, the structure is relatively complex, the processing is difficult, and the use cost is high

In addition, the size of the flow channel of the labyrinth multi-stage control valve is often small, which makes the fluid flow in the flow channel circuitously and bends more times, and there is a great risk of blockage in the flow hole or flow channel; and once the blockage occurs, it cannot be quickly removed , which can reduce the performance of the valve, or even cause the valve to fail, which will bring many troubles to the actual use.

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