Comprehensive method for anticavitation of ultrahigh water head ship lock valve higher than 40m

Abstract

The invention relates to a ship lock valve anticavitation technology, and in particular relates to a comprehensive method for anticavitation of an ultrahigh water head ship lock valve higher than 40m. The invention comprises a water delivery valve, wherein the bottom of the rear gallery of the water delivery valve is downward provided with a bottom stepped sudden expansion, the top of the rear gallery of the water delivery valve is upward provided with an oblique line sudden expansion, and the oblique line sudden expansion is connected with the rear gallery by adopting an upward oblique line;a stepped drop sill and a drop sill vent pipe are arranged at the inlet of the bottom stepped sudden expansion; a stepped booster baffle and a booster baffle vent pipe are arranged at the outlet of the bottom stepped sudden expansion; the outlet gallery bottom elevation of the water delivery valve is higher than the inlet gallery bottom elevation; a door header vent pipe is arranged at a door header of the water delivery valve; and the oblique line sudden expansion is provided with a vent pipe. In the invention, active prevention and passive prevention are combined, the problem of cavitation of a high water head ship lock valve can be effectively solved, and the advantages of simplicity in construction, low investment and convenience in maintenance can be realized.

Description

technical field [0001] The invention relates to a technology for anti-cavitation of ship lock valves, in particular to a comprehensive method for anti-cavitation of ship lock valves with a water head above 40m. Background technique [0002] The ship lock is an important building type that solves the water conservancy and hydropower projects built by ships passing through the river (lake), and realizes smooth navigation along the entire line up and down the river. When the head of the ship lock exceeds 20 meters, it will bring a series of high-speed water flow problems, which will bring great harm to the project, especially the cavitation cavitation problem of the valve and its corridor section is the most prominent, which is directly related to the ship lock. safe and normal operation. Therefore, the cavitation problem in the valve section of the ship lock water delivery system has always been an important key technical difficulty in the single technical design of the ship ...

AI Technical Summary

Problems solved by technology

In order to solve the falling sill cavitation, the project generally adopts steel plate lining for protection, and the sudden expansion of the sill cavitation problem is solved by selecting a complex rising sill curve. These methods have achieved certain results, but increase the project investment, and It brings a lot of inconvenience to the inspection and maintenance of the corridor of the water delivery system

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