Hydropower station free-surface-pressurized flow tail water system

A technology of bright full flow and hydropower stations, applied in hydropower stations, hydroelectric power generation, water conservancy projects, etc., can solve the problems of difficulty in replenishing air for units and the inability to meet the requirements of setting up scale surge chambers

Active Publication Date: 2014-12-03
WUHAN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of topography and geological conditions in actual engineering, it is often impossible to set up a large-scale surge chamber; in addition, in order to make the minimum absolute pressure of the inlet section of the draft tube meet the requirements of the specification and design, the installation elevation of the unit needs to be lowered. But too low installation elevation will bring some difficulty to the air supply of the unit

Method used

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  • Hydropower station free-surface-pressurized flow tail water system
  • Hydropower station free-surface-pressurized flow tail water system
  • Hydropower station free-surface-pressurized flow tail water system

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] (1) Applied to the open flood tail water system when the length of the tail water system is 150m ~ 600m

[0032] When the length of the open and full flow tailrace system is 150m to 600m, the open and full flow tailrace tunnel can be used alone to ensure that the minimum absolute pressure (or vacuum) at the inlet of the draft tube meets the specifications and design requirements. Longitudinal section of tailwater tunnel see figure 1 . The tailrace system in this case includes a draft pipe (5), a connecting section (6) and an open and full flow tailrace tunnel, and the draft pipe (5) is connected to the open and full flow tailrace tunnel through the connecting section (6). If it is a multi-machine one-hole tailwater system, a unit inspection gate well (18) needs to be installed at the outlet of the draft pipe (5) to meet the maintenan...

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Abstract

The invention provides a hydropower station free-surface-pressurized flow tail water system which is formed by sequentially connecting a tail water pipe, a connecting segment, a free-surface-pressurized flow tail water hole or is formed by sequentially connecting the tail water pipe, the connecting segment, a downstream pressure adjusting room and the free-surface-pressurized flow tail water hole. According to the hydropower station free-surface-pressurized flow tail water system, the minimum absolute pressure of the section of an inlet of the trail water pipe can meet the standard requirement more easily, and unit air supplying difficulties caused by the excessively low unit installing elevation can be avoided.

Description

[0001] technical field [0002] The invention belongs to the technical field of hydropower engineering, and in particular relates to an open flood tail water system of a hydropower station. Background technique [0003] With the development of hydropower resources in Southwest my country, many giant and large-scale hydropower stations under planning, design and construction are located in steep terrain and narrow valleys. The riverbed can only be used to arrange water retaining and flood discharge structures, while water transmission and power generation Buildings for water diversion, diversion and some flood discharge must be arranged in the mountains on both banks, which is a typical overall layout of the hub. [0004] When the tail water system of a hydropower station is long, it is generally necessary to set a downstream surge chamber to meet the minimum absolute pressure of the inlet section of the draft pipe of the hydropower station to meet the requirements of the code...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/06
CPCY02E10/20
Inventor 杨建东钮新强王煌周述达王超陈冬波李玲郭文成桂绍波安华
Owner WUHAN UNIV
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