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Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station

A technology of water diversion steel pipe and limit device, which is applied in the direction of hydropower station, traditional hydropower energy, hydropower generation, etc. The effect of reducing earthquake damage and eliminating adverse effects

Active Publication Date: 2015-07-15
POWERCHINA ZHONGNAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of excessive lateral displacement of steel pipes in existing power stations and the fact that the limit baffles are easy to damage the concrete of the pier, the present invention aims to provide a vibration-reducing and energy-dissipating limit device for the water diversion steel pipe support of a hydropower station. The energy limit device can effectively prevent the pier concrete from being damaged, thereby ensuring the safe operation of the entire hydropower project

Method used

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  • Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station
  • Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station
  • Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station

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Embodiment 1

[0021] Example 1. Repair of lateral displacement of water diversion steel pipes in a certain project in Ethiopia

[0022] 1.1 Project overview

[0023] The project is located on the Neshe River in the Blue Nile River Basin, 250km northwest of Addis Ababa, the capital of Ethiopia, at 9°43ˊ~9°46ˊ north latitude and 37°5ˊ~37°16ˊ east longitude. The power station is a peak-shaving power station, which runs for 6.5 hours a day. A total of 2 bucket-type hydro-generator sets are installed, with a gross water head of 614.5m, a single-unit capacity of 48.5MW, a total installed capacity of 97MW, and a single-unit rated reference flow rate of 9.25m 3 / s, the designed annual generating capacity is 215.5 million kW·h.

[0024] The main buildings of this project are mainly composed of dams, spillways, water diversion systems, ground powerhouses and outlet yards. The dam adopts a homogeneous earth dam, with a crest elevation of 2235.0m, a maximum dam height of 38m, a normal storage lev...

Embodiment 2

[0031] Example 2, a dam and power station project in Iran

[0032] A dam and power station project in Iran is located on the Rudbar River in the Zagros Mountains of Lorestan Province in western Iran, about 454km away from the capital Tehran. The power station is a diversion-type power station under complex geological conditions in high earthquake areas. The project consists of major buildings such as dams, spillways, dam body discharge holes, water delivery systems, ground powerhouses and switch stations. The power station has 2 installed units, with a single unit capacity of 225MW, a rated water head of 430.74m, and a rated flow rate of 115.6m 3 / s. The water diversion tunnel has a diameter of 6.0m and a length of about 1.34km. The lengths of double-line ① and ② open-pipe steel pipes are about 2.34km and 2.32km, and the diameters range from 4.4m to 4.0m, 3.8m, and 3.4m. Steel pipes pass through different terrain areas such as steep slopes, gentle slopes, tunnels and gulli...

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Abstract

The invention discloses a vibration damping and energy dissipation limiting device for a water diversion steel pipe bearing of a hydropower station. The device aims at solving the problems that the transverse deflection of a steel pipe of the existing built power station is excessive, and buttress concrete is cracked up by a limiting baffle easily. The vibration damping and energy dissipation limiting device comprises an anti-collision plate arranged on the inner side face of a buttress, wherein a limiting landing leg is arranged between the anti-collision plate and a supporting ring of a water diversion steel pipe; one end of the limiting landing leg is fixed on the supporting ring; the other end of the limiting landing leg is a free end; and a vibration damping pad is mounted at the free end. With the adoption of the device, transverse loads of the bearing and the steel pipe due to an earthquake effect and a water shock wave in the steel pipe are reduced greatly; earthquake damages are reduced; the harmful excessive deflection generated by the steel pipe is limited effectively; and the adverse effects due to the fact that a transverse limiting design gap of the steel pipe is difficult to guarantee caused by a steel pipe mounting error during a construction process are eliminated.

Description

technical field [0001] The invention relates to a vibration-reducing and energy-dissipating limit device for a water diversion steel pipe support of a hydropower station, which is mainly suitable for sliding, rolling and swinging supports of large-diameter open steel pipes of a water diversion power station, especially for complex geology such as high seismic intensity areas and deep overburden layers Large PD value pressure water diversion steel pipes in areas with topographical conditions. Background technique [0002] Under the existing technical conditions, the small-diameter pressure water diversion steel pipe generally adopts a saddle-shaped sliding support. The sliding support has a good wrapping ability on the water diversion steel pipe, and generally there is no need to use a lateral limit device, but for a water diversion steel pipe with a medium-sized diameter and water head, a temporary transverse limit device is generally installed inside the pier. The device w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/02
CPCY02E10/22Y02E10/20
Inventor 刘昌桂张战午曾凡烈邱树先熊春耕谭永华王增武
Owner POWERCHINA ZHONGNAN ENG
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