Novel reducing valve with output pressure responding to flow changes

Abstract

The invention discloses a novel reducing valve with output pressure responding to flow changes. The novel reducing valve comprises a reducing valve main valve, a throttle valve, and a double-acting pilot valve; the reducing valve main valve is provided with a control cavity; the double-acting pilot valve is provided with a throttle valve differential pressure input part; and the high-pressure endand the low-pressure end of the throttle valve are connected with the throttle valve differential pressure input part on the double-acting pilot valve through pipelines. According to the novel reducing valve with the output pressure responding to the flow changes, self-regulation of the output pressure can be achieved according to the flow of the pipelines, the average output pressure is greatly reduced, the pipelines and the valve are prevented from always being under high pressure whether in water-using peak or trough times, the probability of leakage and pipe burst of a piping system is reduced, energy and resources are saved, and the maintenance charge is reduced.

Description

technical field [0001] The invention relates to a control device for the output pressure of a pressure reducing valve, more specifically, it relates to a new type of pressure reducing valve whose output pressure responds to flow changes. Background technique [0002] When the high-pressure water in the outdoor water supply pipe network is decompressed by the pressure-reducing valve and then supplied to the building, in order to ensure the water at the farthest and highest most unfavorable water distribution point, the water pressure after decompression must be equal to or greater than that at the peak of water consumption water pressure. According to the calculation of fluid mechanics, the resistance loss when the fluid flows in the pipeline is proportional to the square of the flow rate, that is, ΔP=SQ 2 , where S is the drag coefficient. When the water consumption peaks, the flow rate is large, the flow rate of water in the pipeline is high, the flow resistance is large,...

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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