Gate pressurizing water stopping method and device for ultra-high head

Abstract

The invention discloses a gate pressurizing water stopping method and device for an ultra-high head. When a pressurizing water seal (H) is connected with an upper level of a gate through a pipeline, the gate pressurizing water stopping device for the ultra-high head is arranged between the pressurizing water seal (H) and the upper level of the gate, and meanwhile the device is connected with a downstream side of the gate through a pipeline. Therefore, pressure acting on the pressurizing water seal (H) can be controlled through the device, so that the pressure acting on the pressurizing water seal (H) is kept consistent with system set pressure of the gate pressurizing water stopping device for the ultra-high head. According to the device, pressure control over a back side pressurizing cavity of the gate pressurizing water seal can be carried out; at the initial work stage of the gate water seal, the water filling pressure value can be properly turned down, and the water filing pressure value is properly increased along with prolonging of the work time limit of the gate water seal to slow down the stress relaxation and creep rate of a water seal material and prolong the working life of the pressurizing water seal; and when slight water leakage happens to gate water stopping, the water filling pressure value can be turned up, and the water stopping effect is enhanced.

Description

technical field [0001] The invention relates to a gate pressurization and sealing method and device for ultra-high water head, and belongs to the technical field of gate sealing in water conservancy and hydropower projects. Background technique [0002] At present, the pressurized water-stop water seal of the gate, especially the pressurized water-stop water seal under the super-high water head water blocking state for a long time, due to the excessive pressure in the pressure chamber on the back side of the water seal, the rubber on the head of the water seal is squeezed. Excessive pressure; due to the stress relaxation and creep characteristics of the rubber itself, long-term work under excessive stress and strain will not only affect its life, but also adversely affect the later water-stop effect. [0003] In the current actual project, the pressurization and sealing use the water pressure of the reservoir upstream of the gate to pressurize the water seal pressure chamber...

AI Technical Summary

Problems solved by technology

[0002]Currently, the pressurized water-stop water seal of the gate, especially the pressurized water-stop water seal under the long-term ultra-high head water blocking state, due to the back side of the water seal Excessive pressure in the pressure chamber will cause excessive extrusion force of the rubber on the head of the water seal; due to the stress relaxation and creep characteristics of the rubber itself, working under excessive stress and strain for a long time will not only affect its life, but also Detrimental effect on the later water stop effect

[0003]In the current actual project, the water pressure of the reservoir upstream of the gate is used to pressurize the water seal pressure chamber for pressure filling and sealing. The pressure changes with the water level of the reservoir and is difficult to adjust. The life of the water seal and the impact of the later water-stop effect are very unfavorable

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