Water hammer pressure control method for parallel multi-row pipe water supply pipe network
A water supply pipe network and pressure control technology, applied in auxiliary non-electrical fluid pressure control and other directions, can solve the problems of large amount of transformation, high engineering cost, medium overflow, etc., and achieve the effect of reducing equipment purchase cost.
Active Publication Date: 2018-11-02
XIAN AEROSPACE PROPULSION TESTING TECHN INST
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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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[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0045] The invention proposes a water hammer pressure control method applied to the water supply network of parallel multi-row pipes. According to the flow resistance characteristics of each branch pipe, the method reasonably controls the action time, action interval, and Action sequence, to achieve the purpose of reducing the water hammer pressure of the water supply network when the water is supplied or cut off; for the parallel multi-pipe fluid medium supply system, on the basis of not changing the original system structure, the optimal control strategy is used to optimize the pipeline It is suitable for the medium supply system of parallel multi-row pipes, and the medium flow rate in each pipe should be basically the same (the difference should not exceed 1m / s); through reasonable control of the water supply valves on the par...
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The invention relates to a water hammer pressure control method for a parallel multi-row pipe water supply pipe network. The water hammer pressure control method solves the problems of medium overflow, easily damaged adjusting valves and increased pipeline flow resistance when an existing water hammer pressure control mode is a passive pressure release mode, and solves the problems of high construction cost and large transformation workload when a mode of additionally arranging a pressure regulating chamber is adopted. The water hammer pressure control method comprises the steps of: 1) performing a water discharge test on the parallel multi-row pipe water supply pipe network, determining a resistance coefficient of a main pipeline of the pipe network to be tested and resistance coefficients of branch pipelines, and determining a relationship between valve operating time and a flow velocity in the corresponding branch pipeline under rated pressure; 2) establishing a hydraulic model of the water supply pipe network; 3) optimizing a valve operating sequence in the established hydraulic model; 4) determining interval time Delta ti of valve operation of each branch pipeline of the tested pipe network; 5) determining the operating time of each valve delta ti; 6) and acquiring a control mode of water hammer pressure of the parallel water supply pipe network to be tested.
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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IPC IPC(8): G05D16/16
CPCG05D16/16
Inventor 刘洋郭立沈继彬唐斌运杨战伟曹庆红许康
Owner XIAN AEROSPACE PROPULSION TESTING TECHN INST