A regulating valve capable of maintaining stable outlet pressure and its outlet pressure control method

Abstract

The invention discloses a regulating valve capable of maintaining stable outlet pressure and a method for controlling the outlet pressure thereof. The regulating valve comprises a valve body, an upper valve plate, a valve cover, a lower valve plate, and a shaft of a valve stem. There are several first Tesla valve-shaped flow passages arranged vertically evenly, and each first Tesla valve-shaped flow passage is connected with the inlet chamber; the upper valve plate is coaxially arranged on the upper part of the lower valve plate, and the upper valve plate A plurality of vertically arranged linear flow passages and a plurality of second Tesla valve-shaped flow passages are distributed evenly and alternately on the circumferential wall surface. The present invention applies the Tesla valve structure with the function of one-way conduction and reverse pressure loss fixation to the valve core structure of the regulating valve. When dealing with upstream pressure fluctuation conditions, the regulation can be changed without changing the outlet flow rate of the valve. The flow resistance of the valve stabilizes the outlet pressure of the regulating valve and improves the adaptability of the regulating valve to the actual working conditions; the execution stroke is short and the rotation displacement is small, and the switching of different stable pressure states can be realized.

Description

technical field [0001] The invention relates to a regulating valve, in particular to a regulating valve capable of maintaining stable outlet pressure and a method for controlling the outlet pressure. Background technique [0002] Regulating valve, also known as control valve, is a valve with an actuator. According to the signal output by the control unit, the regulating valve changes the valve opening through the actuator, which can realize the control of process parameters such as pressure and flow in the system to meet the needs of users. With the continuous improvement of modern industrial automation, control valves are increasingly widely used in metallurgy, energy, chemical, petroleum, military, water conservancy and other industrial sectors, playing an irreplaceable role. [0003] In practical applications, regulating valves often encounter upstream pressure fluctuations. At this time, in order to maintain the stability of the outlet pressure, the flow cross-sectional...

AI Technical Summary

Problems solved by technology

[0003] In practical applications, regulating valves often encounter upstream pressure fluctuations. At this time, in order to maintain the stability of the outlet pressure, the flow cross-sectional area is often adjusted by adjusting the valve opening to adjust the outlet pressure. However, while maintaining the outlet pressure stability , the change of the valve opening will also cause the change of the outlet flow, which is not suitable for occasions that require stable control of the valve outlet flow.

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