Pressure regulating valve of water turbine volute casing

Abstract

The invention relates to a pressure regulating valve of a water turbine volute casing. A valve bush is sleeved outside the tail end of a center pipe in a draining passage coaxially, two coaxial pull rods are fixedly mounted on the valve bush symmetrically and are particularly fixedly mounted on fixing seats fixedly mounted at lower ends of two sides of a fork mounted outside the draining passage, and the fork drives and guides the two pull rods to move horizontally so as to drive the valve bush to move on the center pipe coaxially. The pressure regulating valve in a mechanical combined full-hydraulic control mode realizes water feeding horizontally and water discharging horizontally, is high in throughput capacity and low in operating force, is accurate in movement and safe and reliable due to the pressure differential hydraulic-control mean, and is capable of running with a water turbine speed regulating system better to meet requirements for guaranteeing regulation of hydropower stations.

Description

technical field [0001] The invention belongs to the field of valves, and relates to a spiral shell system of a hydropower station, in particular to a pressure regulating valve for a hydraulic turbine spiral shell. Background technique [0002] my country is rich in water conservancy resources, and in the current situation, more high-head and long-diversion pipe power plants are developed, and high-head or long-pressure diversion system power plants will cause pipeline water pressure and unit speed to increase during load shedding operation. If the speed regulation-voltage regulation system of the power station is not adjusted well, it will directly affect the safe operation of the hydropower station and the power quality of the hydropower, and even cause the pipeline to rupture, leading to the tragedy of machine crash and death. Power stations usually set surge wells to limit the water pressure rise rate of the water diversion system. However, the civil construction investmen...

AI Technical Summary

Problems solved by technology

The successful development of a new speed regulation-pressure regulation linkage system not only requires a lot of capital investment and a long R&D cycle, but also requires long-term technical accumulation and high-quality professionals, which makes most domestic manufacturers have no funds or ability to develop new systems

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