Method for improving operation efficiency of side drainage ship lock by inertia overdrop of water delivery system

Abstract

A method for improving operation efficiency of a side drainage ship lock by inertia overdrop of a water conveying system comprises the steps that the water level difference Z between a side drainage outlet of the ship lock and a downstream approach channel is calculated; according to the water level difference Z, the advanced water-moving valve closing process of the drain valve is determined, namely, the remaining water head H0 and the water-moving valve closing shutdown opening n0 are determined; the water filling valve and the upstream miter gate are closed; a drain valve is opened to drain water in the lock chamber until the drain valve is in a full-open state; the difference value H between the water level of the lock chamber and the water level of the downstream approach channel is synchronously measured in the drainage process, and when H is smaller than or equal to H0 for the first time, the determined drainage valve advanced water moving and valve closing process is started; the water levels on the two sides of the downstream miter gate are flush, and after the miter gate is opened to the end, the drain valve is started again from the opening degree n0 to the opening degree 0. Operation of the miter gate and safety of ship berthing in the lock chamber can be guaranteed, operation equipment can be reduced, the drainage time is shortened, and the purpose of improving the passing efficiency of the ship lock is achieved.

Description

technical field [0001] The invention relates to the technical field of ship lock hydraulics, in particular to a method for improving the operating efficiency of a side discharge ship lock by utilizing the inertia over-drop of a water delivery system. Background technique [0002] High-head ship locks generally adopt a decentralized water delivery system. Due to the complexity of the water delivery system and the large flow inertia, the huge flow inertia at the end of the lock's discharge will block the flow reduction, resulting in inertial over-drop of the water level in the lock chamber. Inertial over-drop shortens the release time of the lock, and at the same time causes great harm to the operation of the lock. Mainly include: (1) Excessive inertia over-drop will cause the miter door to receive a large reverse thrust, damage the opening and closing mechanism components of the miter door, and adversely affect the mechanical and electrical equipment of the miter door; (2) In...

AI Technical Summary

Problems solved by technology

This joint operation of the main and auxiliary valves increases the discharge time of the lock and reduces the operating efficiency of the lock

In particular, in order to reduce the impact of the lock’s inertial over-drop, the valves adopt the measure of moving water in advance to close the valve. The fixed measure of moving water in advance is suitable for a certain △Z, and cannot adapt to the different operating periods of the water conservancy project (flood season, non-water season, etc.). The different △Z values ​​caused by flood seasons pose new challenges to the efficient operation of ship locks

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