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Method for optimizing intermittent opening process of ship lock water delivery valve

An optimization method and valve technology, applied in ship locks, ship lifting devices, climate change adaptation, etc., can solve the problems of increasing the operating time of ship locks and reducing the operating efficiency of ship locks, so as not to affect the navigation efficiency, good engineering application value, and small increase Effect

Active Publication Date: 2021-11-12
CHINA YANGTZE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the intermittent opening process of the ship lock water delivery valve will increase the operating time of the ship lock and reduce the operating efficiency of the ship lock.

Method used

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  • Method for optimizing intermittent opening process of ship lock water delivery valve
  • Method for optimizing intermittent opening process of ship lock water delivery valve
  • Method for optimizing intermittent opening process of ship lock water delivery valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 1-3 As shown, an optimization method for the intermittent opening process of the ship lock water delivery valve. During the filling and discharging process of the ship lock, the hydraulic prototype observation of the water delivery time, water level and cavitation noise parameters during the operation of the ship lock is carried out, and the operation of the ship lock is obtained. The changing characteristics of each hydraulic parameter in the process, through comparative analysis of the data, can effectively evaluate the operation of the lock and determine the appropriate valve intermittent opening process.

[0030] Further, the water level observation and water delivery time observation during the operation of the ship lock, and draw the lock chamber filling and discharge flow process line and the valve well water level process line according to the actual measurement results; the water level observation includes lock chamber water level observation, va...

Embodiment 2

[0046] Taking a certain ship lock as an example, the ship lock is filled with water on one side. In actual operation, it is found that the cavitation and acoustic vibration of the valve section are relatively strong, and the current operation mode of the valve is continuous opening. The process line of the valve well sound pressure level difference measured by the first prototype observation figure 2 . The abscissa is time, the ordinate is the sound pressure level, and the sound pressure level value minus the initial value is the sound level difference ( f =100kHz), line 4 is the valve opening process line. The corresponding valve opening when the sound level difference exceeds 20dB for the first time n 1 =0.41. Satisfy 0.1≤ n 1 n 0 , using the inequality -0.05n z - n 1 ≤0, determine the intermittent opening of the valve n z =0.40 and intermittent time t =0.5min. Repeat hydraulic prototype observations. Find the valve opening corresponding to the moment when it...

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Abstract

The invention discloses a method for optimizing an intermittent opening process of a ship lock water delivery valve, belongs to the field of navigation buildings. Particularly, according to the relation among the cavitation noise sound level difference of a valve section, the intermittent opening degree of the valve and the intermittent time, debugging optimization is implemented, and the finally determined intermittent opening process of the ship lock water delivery valve meets the requirement that the sound level difference of the valve section does not exceed 20 dB. According to the method, cavitation and acoustic vibration of the valve section can be reduced, meanwhile, the increase of the operation time of the ship lock is minimum, the navigation efficiency is not affected as much as possible while the operation safety of the ship lock is guaranteed, and a good engineering application value is achieved.

Description

technical field [0001] The invention relates to the technical field of ship lock hydraulics, in particular to an optimization method for an intermittent opening process of a ship lock water delivery valve. Background technique [0002] In recent years, during the drain inspection of some high-head ship locks, it was found that cavitation and cavitation damage occurred in some areas of the corridor and the valve section. During the opening of the valves of some ship locks, there will be thunder and blasting sounds in the water delivery corridors, and the water delivery valves and hydraulic structures will vibrate strongly. When cavitation and acoustic vibration occur, the pressure behind the valve and the opening and closing force of the hydraulic system will increase significantly, and the pulsation value will be large, which will cause severe impact on the hydraulic system, and even cause instability, resulting in damage to the components of the water delivery valve system....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02C1/06
CPCE02C1/06Y02A10/30
Inventor 喻峰刘绍新陈钢曾辉张娟唐德锋
Owner CHINA YANGTZE POWER
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