Champagne tower type multi-stage throttling control valve

Abstract

The invention relates to the field of valves, in particular to a Champagne tower type multi-stage throttling control valve applied to high-pressure-difference medium noise reduction cavitation damageresistance. The Champagne tower type multi-stage throttling control valve comprises a valve body, a valve cover, a throttling sleeve and a valve element. The appearance of a sleeve cavity of the throttling sleeve is in a ladder hole shape with two or more layers, the appearance of the valve element is in a ladder shaft shape with two or more layers and coaxial with the throttling sleeve, the number of shaft shoulders of the valve element is smaller than or equal to the number of hole shoulders of the sleeve cavity of the throttling sleeve, therefore, in the axial direction, each shaft shoulderof the valve element can be in seal face fit with the corresponding hole shoulder of the throttling sleeve, the hole shoulder of the throttling sleeve and / or the shaft shoulder of the valve element are / is axially or slantly provided with a runner groove, the structure is compact and simple, the action reliability is high, the valve machining difficulty and cost can be further reduced while effective noise reduction and cavitation damage resistance functions are achieved, and the valve is particularly suitable for being used in the high-pressure-difference medium control condition.

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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