Spindle seal pressure steel pipe side water supply pipeline of water turbine unit

Abstract

A spindle seal pressure steel pipe side water supply pipeline of a water turbine unit comprises a left-side water supply pipe and a right-side water supply pipe; an electric valve and a main water taking valve are mounted on the right-side water supply pipe; an intermediate flange, a pressure relief protection valve, a safety valve and a connecting valve are mounted on the left-side water supply pipe; the pipeline is characterized in that a circular pressure reducing pipe is connected between the left-side water supply pipe and the right-side water supply pipe through a flange; the circular pressure reducing pipe is limited by a plurality of positioning clips for preventing the circular pressure reducing pipe from extending outwards and is mounted on a suspending supporting body; and a filter is mounted on the right-side water supply pipe and is located between the main water taking valve and the electric valve. Pipeline vibration caused by pressure adjustment can be eliminated or reduced with the spindle seal pressure steel pipe side water supply pipeline, and the phenomenon of sediment blockage inside the pipeline is eliminated. According to the pipeline, transformation is performed on the basis of existing equipment layout, the work quantity is small, and the transformation cost is saved.

Description

technical field [0001] The invention relates to a main shaft sealing water supply system of a water turbine unit, in particular related to the structure of the main shaft sealing pressure steel pipe side water supply pipeline of the water turbine unit, in particular to a main shaft sealing pressure steel pipe side water supply pipeline of the water turbine unit. Background technique [0002] Hebei Zhanghewan Pumped Storage Power Station has an installed capacity of 1 million kW, and installed four 250,000 kW single-stage mixed-flow reversible pump-turbine generator sets. The annual design power generation is 1.675 billion KWh, and the annual pumping power consumption is 2.204 billion KWh , the comprehensive efficiency of the power station is 0.76. In the power grid, the power station is mainly responsible for tasks such as peak regulation, valley filling, frequency regulation, phase regulation and spinning reserve. The water turbine is a vertical shaft single-stage reversib...

AI Technical Summary

Problems solved by technology

Since the units of Zhanghewan Pumped Storage Power Station in Hebei Province were put into operation, the system has been found to have the following defects: ① There is no filter at the inlet of the pressure reducing valve, which often leads to blockage of the valve core of the pressure reducing valve, so that the pressure cannot be reduced normally

②The decompression effect is not ideal. After the unit has been running for a period of time, due to the vibration of the unit, the pressure after decompression does not match the design pressure, and the pressure relief valve needs to be manually adjusted.

③The water supply pipeline vibrates greatly. Due to the unsatisfactory decompression effect, the safety valve near the electric valve at the outlet of the pipeline operates frequently to release the pressure.

[0004] The above technologies have not given specific guidance on how to make the main shaft of the hydraulic turbine unit seal the pressure steel pipe side water supply pipeline, how to eliminate or reduce the pipeline vibration caused by pressure adjustment, and eliminate the sediment blockage in the pipeline

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