A water hammer pressure control method for parallel multi-row pipe water supply network

Abstract

The invention relates to a water hammer pressure control method of a parallel multi-row pipe water supply network, which solves the problems of medium overflow, easily damaged regulating valves, and increased flow resistance of pipelines when the existing water hammer pressure control method is a passive pressure relief method. When the method of adding a surge chamber is adopted, the project cost is relatively high and the amount of transformation is large. The method includes: 1) Conduct a water discharge test on the pipeline network to be tested for water supply with multiple rows of pipes in parallel, and determine the resistance of the main pipeline of the pipeline network to be tested coefficient and the resistance coefficient of the branch pipeline, determine the relationship between the action time of each valve under the rated pressure and the flow velocity in the corresponding branch pipeline; 2) establish the hydraulic model of the water supply network; 3) optimize the action of each valve in the established hydraulic model Sequence; 4) Determine the interval time △ti of the valve action of each branch pipeline of the measured pipe network; 5) Determine the action time δti of each valve; 6) Obtain the control method of the water hammer pressure of the parallel water supply network of the pipe network to be measured.

Description

technical field [0001] The invention relates to the field of pipeline pressure control, in particular to a water hammer pressure control method for a water supply pipeline network with multiple rows of parallel pipes. Background technique [0002] The pipeline is a key component for transporting fluid. The water hammer pressure in the pipeline is related to the change rate of the fluid velocity, which can be divided into direct water hammer pressure and indirect water hammer pressure; the existing water hammer pressure control method of water supply pipeline Mainly include the following: [0003] One is to reduce the water hammer pressure by optimizing the closing time and closing method of the gate. For example: Tang Jun, Zhang Hongming, Wang Wenquan. Water hammer analysis of long-distance pressurized water pipeline system [J]. Hydropower Energy Science. 2010.28(2): 82-84. The principle of this method is to adjust the action time of a single valve and The action mode redu...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of medium overflow, easily damaged regulating valve, and increased pipeline flow resistance when the existing water hammer pressure control method is passive pressure relief, and the project cost is relatively high when the method of adding a pressure regulating chamber is adopted , The problem of large amount of transformation, providing a water hammer pressure control method for parallel multi-row pipe water supply pipe network

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