Leakage control device for ball valve telescopic joint of pump storage group

Abstract

The invention discloses a leakage control device for a ball valve telescopic joint of a pump storage group. A horizontal U-shaped seal ring is arranged in a ball valve downstream telescopic joint; the position of an open slot of the horizontal U-shaped seal ring is provided with a combined O-shaped seal ring; the combined O-shaped seal ring is separated into at least two sections; the at least two sections are connected by an instant adhesive; the thickness of the instant adhesive is smaller than the diameter of the combined O-shaped seal ring. According to the leakage control device for the ball valve telescopic joint of the pump storage group disclosed by the invention, the problem that the horizontal U-shaped seal ring deforms and cannot be tightly sealed due to the weight of the telescopic joint can be eliminated, and even if the horizontal U-shaped seal ring has deformation, the open slot of the horizontal U-shaped seal ring cannot be tightly sealed with equipment, but as the existence of the combined O-shaped seal ring, the horizontal U-shaped seal ring also can be tightly sealed with the equipment as well, and a gap cannot exist. Under the action of water pressure in a pipeline, an aqueous medium can flow through multiple sections of the combined O-shaped seal ring as well to enter the open slot of the horizontal U-shaped seal ring to expand the open slot of the horizontal U-shaped seal ring, and therefore, seal and water-stop effects are exerted.

Description

technical field [0001] The invention belongs to the technical field of pumped energy storage, and in particular relates to a leakage prevention device for a ball valve expansion joint of a pumped energy storage unit. Background technique [0002] Most of the pumped storage power stations are underground powerhouse structures, equipped with rated water head and rated power turbine working conditions, using water medium to pass through diversion tunnels, pressure steel pipes, ball valves, expansion joints downstream of ball valves, volutes, runners, draft pipes, etc. The circulation between the reservoir and the lower reservoir realizes the functions of power generation and water pumping. Therefore, in the entire water diversion channel system, the sealing of the water medium plays a vital role. If there is a large amount of water leakage in any point of equipment, it will cause water to flood the underground powerhouse, causing very serious consequences. Among them, the ball...

AI Technical Summary

Problems solved by technology

Due to the different deformation of the horizontal U-shaped sealing ring, when the U-shaped mouth of the horizontal U-shaped sealing ring is opened, its expansion angle and size also change accordingly, and it cannot be fully opened or deformed, resulting in a large amount of water leakage, which cannot meet the requirements. Unit water pressure requirements

After various maintenance measures on site, such as replacing the seal of the expansion joint of the ball valve, readjusting the clearance fit of the movable ring, increasing the compression torque of the bolt, and applying sealant, etc., there is no obvious improvement

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