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Overflow dam flood discharge underflow flushing preventing energy dissipation wall

An overflow dam and anti-scouring technology, which is applied in water conservancy projects, sea area projects, coastline protection, etc., can solve problems such as the difficulty of wear and repair, reduce erosion and wear, reduce construction and maintenance costs, and increase the service life of the project Effect

Pending Publication Date: 2020-09-25
王颖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the long-term operation of the overflow dam flood discharge process causes serious wear and difficult repair of the bottom flow scouring stilling pool, the present invention provides an overflow dam flood discharge bottom flow anti-scour energy dissipation wall

Method used

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  • Overflow dam flood discharge underflow flushing preventing energy dissipation wall
  • Overflow dam flood discharge underflow flushing preventing energy dissipation wall
  • Overflow dam flood discharge underflow flushing preventing energy dissipation wall

Examples

Experimental program
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Effect test

Embodiment 2

[0045] Embodiment 2: On the basis of Embodiment 1, flow guide ribs are further distributed on the flow guide base 351 of each energy dissipation unit 35 along the direction of its concave cone surface 3512, as shown in Figure 14 As shown, a straight diversion groove 3515 is formed in the area between adjacent diversion ribs, and the area located in the adjacent straight diversion groove 3515 forms a lateral thrust on the diversion base 351 due to changes in the impact pressure of the water flow, thereby forming The energy dissipation units 35 are vibrated and transmitted to the main frame 33 to dissipate energy.

Embodiment 3

[0046] Embodiment 3: On the basis of the above 2, further design makes the main part of the inner threaded rod 352 be prismatic, so that the threaded rod 352 and each flow guide base 351 can rotate synchronously.

[0047] Such as Figure 15 and Figure 16 As shown, the inner shaft sleeve 358 is used to support the end of the flow guide base 351 to provide sufficient pressure to make it stable, and the outer side of the inner shaft sleeve 358 is fitted with the locking sleeve 354, and the two are snapped together by the inner ring step and can be Rotate, the outer side of the lock sleeve 354 is fixed by the side link 355 .

[0048] Simultaneously, there are guide ribs distributed along the direction of the spiral direction of the guide base 351 along its concave cone surface 3512, and a spiral guide groove 3516 is formed in the area between adjacent guide ribs, and the water flow impacts the guide base 351 to make it Rotate, the adjacent flow guide bases 351 on the same inner...

Embodiment 4

[0049] Embodiment 4: There is a similar design to Embodiment 3, so that the main body part of the inner wear rod 352 is prismatic, or a plane is provided on the side of the cylindrical main part or a protruding or concave position or keyway is arranged in the axial direction, and in Wear the inner bushing 358 of pull rod 351 outer suit, inner bushing 358 central hole inwall has keyway 3514 or key, as Figure 15 and Figure 16 As shown, the tie rod 352 and each flow guide base member 351 can rotate synchronously and integrally.

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Abstract

The invention discloses an overflow dam flood discharge underflow flushing preventing energy dissipation wall. A falling sill stilling pool is arranged on the bottom of an overflow dam main body flooddischarge channel. An energy dissipation wall body is arranged at the far end. A composite permeable energy dissipation wall fixed into a bottom layer is arranged in an area between the stilling pooland the far end energy dissipation wall body, or a front end area of the stilling pool or a front end area of the far end energy dissipation wall body. According to the overflow dam flood discharge underflow flushing preventing energy dissipation wall, the composite permeable energy dissipation wall is arranged in the area between the stilling pool and the far end energy dissipation wall body, inthe energy dissipation process, some discharged water is subjected to friction, rotary rolling, dispersing and colliding, and changes into heat energy to be dissipated. When the composite energy dissipation wall is built before the stilling pool, flushing and wearing to an original stilling pool by high-speed water flow can be reduced to the great extent.

Description

technical field [0001] The invention belongs to the technical field of underflow energy dissipation under high water head and large flow conditions, and in particular relates to an underflow anti-scouring energy dissipation wall for overflow dam flood discharge. Background technique [0002] The traditional energy dissipation methods of overflow dams with high water head and large flow mainly include deflecting flow, bottom flow, and surface flow. Each energy dissipation method has its own advantages and disadvantages, and it is often difficult to achieve the best energy dissipation method with only one energy dissipation method. Energy dissipation effect, some large-scale hydropower stations that use deflector energy dissipation usually combine multiple energy dissipation methods. The deflected flow energy dissipation method has the characteristics of small engineering volume and simple construction, and it is used in the first place for the flood output of high dams. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
CPCE02B8/06
Inventor 王颖庞瑞杜玉娟郭晓茜陈何萱陈俊杰田雪平张红旭
Owner 王颖
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