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Water fin removing tool

A water fin and width technology, applied in the field of drainage facilities, can solve the problems of increasing the pulsating pressure of the side wall of the spillway, increasing the height of the side wall of the spillway, and disorder of the flow state of the spillway, etc., so as to eliminate the phenomenon of water fins, have a simple structure, and improve the water flow. flow effect

Inactive Publication Date: 2010-06-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the spillway layout of water conservancy and hydropower projects, due to the large overflow width of many spillways, gate piers are required in the middle. In order to meet the structural stability requirements of gate slots and gate piers, the width of spillway gate piers is often greater than 3m, and the spillway gate hole Generally, they are steep slopes. In this arrangement, when the spillway flows, the two streams behind the pier collide with each other to form a serious water fin phenomenon, which causes the flow state behind the spillway to be disordered and increases the pressure on the side wall of the spillway. The pulsating pressure produces obvious diamond-shaped waves, and the height of the side wall of the spillway needs to be increased, thereby increasing the project investment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] In this embodiment, the water fin elimination tool is poured with concrete, and its shape and structure are as follows: figure 1 , figure 2 , image 3 , Figure 4 As shown, it is a four-sided platform, the bottom of the front end face 1 and the rear end face 4 are located on the same horizontal plane; the front end face 1 is a rectangular surface, and the intersection of the top edge of the rectangle and the two sides is formed by a circle tangent to the two intersecting sides. Arc connection, the rear end surface 4 is a "∩"-shaped surface formed by a combination of a rectangle and a semicircle, the upper side 2 and the right side 3, and the left side 6 transition through an arc surface, and the lower side 5 and the right side 3, the left side Surface 6 transitions via an edge.

[0022] According to the local topography and geological conditions, the overflow weir of the project spillway adopts a practical weir. Therefore, the relevant dimensions of the water fin e...

Embodiment 2

[0026] The water fin elimination work in the present embodiment is as figure 1 , figure 2 , image 3 , Figure 4 Shown, its shape, structure are identical with the hydrofin elimination tool described in embodiment 1.

[0027] Because the hydrofin elimination tool described in this embodiment is used for wide-crested weirs, according to this specific project, the relevant dimensions are: the height h of the front end face 1 1 = 6m (1.03 times the water depth at the tail of the spillway sluice pier), the width b of the front end face 1 1 = 3m (the width of the spillway gate pier); the height h of the rear end face 4 2 = 4.12m (1.05 times the water depth at the installation position of the end face), the width b of the rear end face 4 2 =0.4m (0.13 times the width of the spillway pier); the distance d between the front end face 1 and the rear end face 4=17m (5.7 times the width of the spillway pier).

[0028] In this embodiment, two water fin elimination workers are instal...

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Abstract

A water-wring eliminating element is a quadrangular frustum pyramid structure, whose front end face and back end face are located on the same horizontal plane, wherein the height h1 of the front end face is 1-1.1 times of water depth on the tail of lock pier, and the width b1 is equal to the width of the lock pier, and the height h2 and the width b2 of the back end face are decided by the type ofan over-fall dam, the height h2 of the back end face is 0.5-0.6 times of the water depth on the end face position and the width b2 is the 1 / 7-1 / 6 of the width of the lock pier if the over-fall dam isa utility dam type, and the height h2 of the back end face is 1-1.1 times of the water depth on the end face installation position, and the width b2 is the 1 / 8-1-6 of the width of the lock pier if theover-fall dam is a broad-topped dam, and the distance d between the front end face and the back end face is 5-6 times of the width of the lock pier. The water-wring eliminating element is installed on the back of the lock pier in an over-fall tunnel or a river tunnel gate dam, which can eliminate the water-wring phenomenon on the back of the over-fall tunnel or the river tunnel gate dam, and improves the water flow state in the over-fall tunnel or the river tunnel.

Description

technical field [0001] The invention belongs to drainage facilities used in water conservancy and hydropower projects, in particular to a drainage facility applied behind a spillway pier or a river gate pier to eliminate the phenomenon of water fins. Background technique [0002] In the spillway layout of water conservancy and hydropower projects, due to the large overflow width of many spillways, gate piers are required in the middle. In order to meet the structural stability requirements of gate slots and gate piers, the width of spillway gate piers is often greater than 3m, and the spillway gate hole Generally, they are steep slopes. In this arrangement, when the spillway flows, the two streams behind the pier collide with each other to form a serious water fin phenomenon, which causes the flow state behind the spillway to be disordered and increases the pressure on the side wall of the spillway. The pulsating pressure produces obvious rhombic waves, and the height of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B8/06
Inventor 刁明军李斌华方旭东文俊
Owner SICHUAN UNIV
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