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Flip bucket used for bank side spillway or tunnel spillway outlet

A technology of spillway and spillway, which is applied in the field of deflecting the nose sill, can solve the problems of the limited space for the diffusion of the discharge tongue and the inability to meet the requirements of energy dissipation and anti-scour of the project, so as to achieve remarkable energy dissipation effect, increase the contact area, and aeration strong effect

Active Publication Date: 2017-03-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the bank-type discharge structure often has a certain intersection angle with the narrow river channel, the diffusion space of the discharge tongue is limited, and the return of the water tongue to the groove and the stability of the high and steep bank slope are more prominent. Therefore, the conventional water disc

Method used

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  • Flip bucket used for bank side spillway or tunnel spillway outlet
  • Flip bucket used for bank side spillway or tunnel spillway outlet
  • Flip bucket used for bank side spillway or tunnel spillway outlet

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The deflecting nose sill described in this embodiment is used in the flood discharge tunnel of the narrow valley, the angle γ between the axis of the flood discharge tunnel and the middle line of the river course is 30°, and the width of the floor of the flood discharge tunnel is 9m.

[0026] The deflecting nose sill described in the present embodiment is made of reinforced concrete, and its shape and structure are as follows: figure 1 , figure 2 As shown, it is composed of a bottom plate 1, a first side wall 2 and a second side wall 3, and the bottom plate 1 includes a water-passing surface 1-1 and two sides intersecting with the water-passing surface (the first side 1-2, the second side 1-3 ), the water passing surface 1-1 of the bottom plate is an upwardly concave arc surface, and the water passing surface 1-1 is sequentially composed of an equal arc section 1-1-1 and a toothed outlet section 1-1-2 along the water flow direction, The two sides of the equal-arc sect...

Embodiment 2

[0031] The deflecting nose sill described in this embodiment is used for a bank spillway with a steep bank slope, the angle γ between the axis of the spillway and the center line of the river is 25°, and the width of the floor of the spillway is 25m.

[0032] The deflecting nose sill described in the present embodiment is made of reinforced concrete, and its shape and structure are as follows: figure 1 , figure 2 Shown, is identical with embodiment 1.

[0033] According to the specific project, the relevant dimensions of the deflected nose sill are as follows:

[0034] Bottom plate width B=25m, the total arc length L of the equal arc section of the bottom plate passing water surface and the toothed outlet section of the bottom plate passing water surface on the big tooth side 1 =30.54m, the angle θ between the tangent line of the large tooth exit of the toothed exit section of the water surface of the bottom plate and the horizontal plane 1 =π / 7.2 radian=25°, the radius of...

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Abstract

The invention relates to a flip bucket used for a bank side spillway or tunnel spillway outlet. The flip bucket is composed of a bottom plate, a first side wall and a second side wall. The bottom plate comprises a water passing face and two side faces intersecting with the water passing face. The water passing face is an arc face concaved upwards. The water passing face is sequentially composed of an equal-radian section and a tooth-shaped outlet section in the water flow direction. The two side faces of the equal-radian section of the water passing face are cylinder faces the same in axis and circle center angle, wherein the difference of the radii of the two side faces is the width of the bottom plate. The tooth-shaped outlet section of the water passing face is of a tooth-shaped structure formed by a large tooth and a small tooth. The large tooth is located on the outer side in the water flow turning direction, and the radius of the outer side face of the large tooth is equal to the radius of the corresponding side face of the equal-radian section of the water passing face. The small tooth is located on the inner side in the water flow turning direction, and the radius of the outer side face of the small tooth is equal to the radius of the corresponding side face of the equal-radian section of the water passing face. The applicable flip bucket is provided for the narrow river valley bank side spillway or tunnel spillway outlet, and the problems about groove returning of a trajectory nappe and scour prevention of a downstream river channel under the terrain condition are solved.

Description

technical field [0001] The invention belongs to the field of flood discharge and energy dissipation facilities in water conservancy and hydropower projects, and in particular relates to a deflector nose sill used for the outlet of a bank spillway or a flood discharge tunnel. Background technique [0002] In areas with narrow river valleys and steep slopes, large-scale hydropower projects with high water head, large flow, and high-power flood discharge will be built. Whether the type of flood discharge and energy dissipation buildings is reasonable will directly affect the reliability and safety of project operation, and is an important aspect of the entire hub. Part. According to the practical experience of many projects at home and abroad, the flood discharge and energy dissipation method of high dams generally choose deflection energy dissipation. Because the bank-type discharge structure often has a certain intersection angle with the narrow river channel, the diffusion ...

Claims

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Application Information

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IPC IPC(8): E02B8/06
CPCE02B8/06
Inventor 王磊刁明军
Owner SICHUAN UNIV
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