Pressure-reducing valve closed ring control system with variable output pressure

Abstract

The invention discloses a pressure-reducing valve closed ring control system with variable output pressure. The pressure-reducing valve closed ring control system with variable output pressure comprises a pressure-reducing valve, and also comprises a flow sensor, a pressure sensor, a servo motor, a data storage and signal conversion module, a comparison module and a PID controller. The flow sensoris connected with the inlet end of the pressure-reducing valve in series, the pressure sensor is arranged at the outlet end of the pressure-reducing valve, and the servo motor is arranged at the topend of the pressure-reducing valve. The flow sensor is connected with an actual output flow interface of the pressure-reducing valve, the flow sensor is electrically connected with the data storage and signal conversion module, and the data storage and signal conversion module is electrically connected with the comparison module; and the pressure sensor is connected with an output pressure signalinterface of the pressure-reducing valve, and the pressure sensor is electrically connected with the comparison module. The comparison module is electrically connected with the PID controller, and thePID controller is electrically connected with the servo motor. A pressure adjusting mechanism is arranged on the pressure-reducing valve, and an output shaft of the servo motor is connected with thepressure adjusting mechanism. The pressure-reducing valve closed ring control system with variable output pressure is favorable for maintaining the normal service life of a pipeline system and reducing the maintenance cost.

Description

Technical field [0001] The invention relates to a control system for the output pressure of a pressure reducing valve, more specifically, it relates to a closed loop control system for a variable output pressure pressure reducing valve. Background technique [0002] When the outdoor water supply pipe network supplies water to high-rise buildings, in order to save energy and prevent the lower pipeline system from being subjected to excessive water pressure, the district water supply method is often used, that is, the high water pressure of the outdoor water supply pipe network is directly reduced by a pressure reducing valve. Water is supplied to the low area, and the high area is supplied by pressurized water storage equipment. Since the height of the low area is not low, the water pressure after pressure reduction with a pressure reducing valve is still very high. The formula for calculating the total pressure of water supply is: H=H 1 +H 2 +H 3 +H 4 +H 5 , Where, [0003] H 1 ——...

AI Technical Summary

Problems solved by technology

According to information, the amount of water leakage generally accounts for more than 20% of the total water consumption. For pipelines that have been used for a long time, have poor materials, and poor construction quality, the amount of water leakage can even reach more than 40% of the total water consumption. resources, and increased maintenance costs

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