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Multi-channel aeration facility with front oblique tail pier

A sloping tail pier, multi-channel technology, applied in water conservancy projects, marine engineering, coastline protection and other directions, can solve the problems of increasing project investment, hidden dangers of cavitation and cavitation, uneven and sufficient cross-section aeration, and reduce the headroom. area, reduce project cost, and eliminate the effect of water crown phenomenon

Active Publication Date: 2013-12-04
POWER CHINA KUNMING ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a spillway with a wide chute, the aeration of the bottom cavity based on the aeration wells on both sides of the left and right side walls may cause uneven and sufficient aeration of the entire section, and the possible blind area of ​​aeration may cause cavitation on the flow surface Hidden danger of cavitation, the method of setting a partition wall between the two gates to increase the aeration channel increases the project investment

Method used

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  • Multi-channel aeration facility with front oblique tail pier
  • Multi-channel aeration facility with front oblique tail pier
  • Multi-channel aeration facility with front oblique tail pier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 , 2 As shown (the most basic two-hole gate spillway), the multi-channel aeration facility of the front inclined tail pier of the present invention is mainly composed of the inclined tail pier 6 and the aeration facility 3 arranged behind the spillway gate pier 1, and the inclined tail pier is in the At the tail of the gate pier, the cross-section of the inclined tail pier is followed by the aeration facility, and the initial section formed by the inclined tail pier and the bottom cavity of the aeration facility completely overlaps. The multi-channel aeration facilities of the front inclined tail pier of the spillway with more than two holes can increase the structure in turn, the number of structures = the number of gate holes-1.

[0020] The inclined tail pier is constructed according to the width of the pier and the characteristic parameters of water flow, and is composed of a hexahedron (see image 3 , 4 ). The lower plane coincides with the flow...

Embodiment 2

[0023] The multi-channel aeration facilities of the front inclined tail pier of the spillway of large-scale water conservancy and hydropower projects are as follows: Figure 5 , Image 6 shown. The spillway consists of three gate holes and two gate piers. The clear width of each gate hole is 9m, the width of the gate piers is 4m, and the width of the spillway chute is 35m.

[0024] Head height H of inclined tail pier 1 =12.02m, height H of pier end 2 =7.02m; the width of the head of the inclined tail pier B 1 =4m, pier end width B 2 =0.95m. The plane shrinkage angle of the inclined tail pier is α=6°; the slope of the lower plane is 1:a=1:0.75 (determined according to the slope of the flow surface); the slope of the upper plane is 1:b=1:0.6 (determined according to the design flood level water surface line ).

[0025] The height of the aerated lifting ridge is 0.92m, the height of the drop ridge is 2m, the width of the air inlet of the air well is 1.5m, the height of the...

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Abstract

The invention discloses a multi-channel aeration facility with a front oblique tail pier. The multi-channel aeration facility is used for eliminating water crowns behind a gate pier of a spillway of hydraulic and hydropower engineering and performing aeration protection on flow surfaces. The multi-channel aeration facility comprises the oblique tail pier and an aeration facility. The oblique tail pier and the aeration facility are arranged behind the gate pier of the spillway, the oblique tail pier is arranged at the tail of the gate pier, the aeration facility is closely connected to the rear of the section side of the oblique tail pier, and the oblique tail pier is completely coincided with an initial section side which is formed by a bottom cavity of the aeration facility. The aeration facility can be selectively in a 'flip bucket and vertical drop' combination modes, a 'flip bucket and aeration groove' combination mode and the like. The multi-channel aeration facility has the advantages that air supply channels can be increased while the water crowns behind the gate pier can be effectively eliminated, a three-dimensional aeration cavity is formed, the bottom cavity and a natural tail cavity of the oblique tail pier can be communicated with each other via the three-dimensional aeration cavity, accordingly, the aeration areas of the inside of the cavities are increased, and the water aeration quantity, an air-water ratio and a flow surface aeration concentration are also correspondingly increased; a multi-channel air feeding effect is favorable for sufficient and uniform all-section aeration, the air speeds of two side ventilation wells are reduced, and an aeration protection function of the aeration facility is further strengthened.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering discharge buildings, in particular to a drainage and aeration facility applied to the elimination of the water crown behind the pier of the spillway and the aeration and corrosion reduction protection of the overflow surface. Background technique [0002] Spillways are the most common discharge structures in water conservancy and hydropower projects. Most of the spillways need to be equipped with gate piers due to their large flow width. After the water flow in the sluice hole collects and collides behind the pier, a serious water crown phenomenon will occur, which will deteriorate the flow state of the spillway, increase the height of the side wall and increase the project investment. Therefore, eliminating the water crown behind the pier of the spillway is an important content of the hydraulic design of the spillway . For high-head water conservancy and hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
Inventor 罗永钦张绍春栗国忱白绍学杨家卫杨华李红英
Owner POWER CHINA KUNMING ENG CORP LTD
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