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A kind of impedance upper chamber type pressure regulating chamber

A surge chamber and impedance hole technology, which is applied in water conservancy projects, hydroelectric power stations, hydroelectric power generation, etc., can solve the problems of high shaft height and large investment, and achieve the effect of saving investment and reducing height

Active Publication Date: 2016-06-22
POWERCHINA ZHONGNAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal circumstances, the surge wave generated by the sudden load rejection chamber of the unit is completely accommodated by the shaft volume of the surge chamber, resulting in the phenomenon that the height of the shaft is too high and the investment is large

Method used

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  • A kind of impedance upper chamber type pressure regulating chamber
  • A kind of impedance upper chamber type pressure regulating chamber
  • A kind of impedance upper chamber type pressure regulating chamber

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Experimental program
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Embodiment Construction

[0043] 1. Basic overview

[0044] A hydropower station in southwest China is a third-class medium-sized project. Its development task is to generate electricity, with a total installed capacity of 90MW. The hub buildings are mainly composed of concrete dams, water diversion systems on the left bank and bank-type ground powerhouses.

[0045] The water diversion structure is arranged on the left bank of the Dingqu River, consisting of water inlet, diversion tunnel, surge chamber and pressure pipeline. The diversion tunnel is about 14398m long from the end of the water inlet to the center of the surge chamber. The surge chamber adopts a cylindrical impedance type with an upper chamber. The construction branch tunnel and the upper chamber of the surge chamber have a section size of 4.5m×5.0m (width×height) and a length of 100m.

[0046] 2. Structural design

[0047] According to the hydraulic calculation results of the surge chamber, as the elevation of the upper chamber floor ...

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Abstract

The invention discloses an impedance upper chamber type pressure adjusting chamber. In order to effectively reduce the shaft height of the pressure adjusting chamber, lower construction difficulty and save investment, the impedance upper chamber type pressure adjusting chamber comprises a pressure adjusting chamber shaft and a construction adit which are communicated with a pressure head race through impedance holes. The pressure adjusting chamber shaft and the construction adit are communicated. A blocking body is arranged in the construction adit. The elevation Zs of a bottom board on the portion of the blocking body of the construction adit serving as an upper chamber of the pressure adjusting chamber is lower than the highest surge elevation Zmax in the pressure adjusting chamber shaft. According to the impedance upper chamber type pressure adjusting chamber, the aspect that the volume of the construction adit at the top of the pressure adjusting chamber is used is considered, the construction adit serves as the upper chamber of the pressure adjusting chamber, so that the height of the pressure adjusting chamber shaft is greatly reduced, and investment is saved.

Description

technical field [0001] The invention relates to an impedance-upper-chamber-type surge chamber, which is mainly used for all-underground arrangement of the surge chamber in a diversion-type development power station. Background technique [0002] In order to meet the regulation guarantee calculation requirements in long-diversion development power stations, surge chambers are generally required. Impedance surge chambers have the advantages of simple structure, small volume, small bottom water head loss during normal operation, small water level fluctuation amplitude, and relatively low fluctuation attenuation. Fast and other advantages, and thus widely used. Usually, the surge wave generated by the sudden load rejection chamber of the unit is completely accommodated by the shaft volume of the surge chamber, resulting in the phenomenon that the height of the shaft is too high and the investment is large. [0003] Considering the construction method and construction progress, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/00E02B9/06
CPCY02E10/20
Inventor 高宇黄小春尹浩梁剑
Owner POWERCHINA ZHONGNAN ENG