Flood discharge method and device for corrosion prevention and energy dissipation of rotational flow annular weir
A ring-shaped, anti-corrosion technology, applied in the direction of barrage/weir, hydraulic engineering, marine engineering, etc., can solve problems such as shaft cavitation and negative pressure easily generated in shafts
Active Publication Date: 2021-04-06
浙江华铖建设有限公司
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Problems solved by technology
[0005] In order to solve the problem that negative pressure is easily generated in the shaft and cause cavitation in the shaft, the application provides a flood discharge method and device for swirling annular weirs to prevent corrosion and dissipate energy
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[0036] The following is attached Figure 1-3 The application is described in further detail.
[0037] The embodiment of the present application discloses a flood discharge device for corrosion prevention and energy dissipation of a swirling annular weir 11 . refer to figure 1 , including vertical shaft 1, flat hole 2 and outlet hole 3 connected in sequence.
[0038] refer to figure 2 , the upper end of the shaft 1 is provided with a water inlet, the entrance of the shaft 1 is connected with an annular weir 11, the annular weir 11 is trumpet-shaped, and the narrow end of the annular weir 11 is connected with the shaft 1. The inner ring of the annular weir 11 forms a smooth shrinking curved surface connection with the shaft 1 . The annular weir 11 is fixedly connected with a plurality of diversion piers 12, and the center line of the diversion piers 12 and the tangent line of the annular weir 11 form an angle of 10-40 degrees. One side of the diversion pier 12 is fixedly c...
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The invention relates to a flood discharge device for corrosion prevention and energy dissipation of a rotational flow annular weir, and relates to the technical field of water conservancy projects. The flood discharge device comprises a vertical shaft, a adit and a water outlet hole which are sequentially connected, wherein a water inlet is formed in one end, far away from the adit, of the vertical shaft, and an energy dissipation part is arranged at the joint of the vertical shaft and the adit; the energy dissipation part comprises a connecting pipe for connecting the vertical shaft and the adit and an energy dissipation chamber which is arranged on the connecting pipe and communicates with the connecting pipe; the energy dissipation chamber is in a hollow cylinder shape, and two fixing holes which are oppositely arranged are formed in the circumferential side wall of the energy dissipation chamber; the end part of the connecting pipe is fixed in the fixing holes; a rotating rod which is vertically arranged is rotationally arranged in the energy dissipation chamber; the axis of the rotating rod coincides with the axis of the energy dissipation chamber; and a plurality of reversing blades which are arranged at intervals are fixed on the outer side wall of the rotating rod. The flood discharge device has the effects that negative pressure generated in the vertical shaft is reduced, and the cavitation erosion phenomenon is reduced.
Description
technical field [0001] The application relates to the field of water conservancy engineering technology, in particular to a flood discharge method and device for anti-corrosion and energy dissipation of a swirling annular weir. Background technique [0002] At present, in water conservancy and hydropower projects, when the water retaining structure of the reservoir is an earth-rock dam, the spillway or spillway tunnel method is often used for flood discharge, but when the terrain on both sides of the dam site is steep and the spillway conditions are not met, the spillway tunnel method is often used , and often combined with the layout of construction diversion tunnels. [0003] The existing Chinese invention patent with the notification number CN101881020B discloses a method and device for dissipating energy in a self-regulating shaft of a submerged swivel pier, including a swirl shaft connected to a horizontal spillway at the bottom to allow the flood to fall vertically. T...
Claims
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IPC IPC(8): E02B8/06E02B7/00
CPCE02B8/06E02B7/00
Inventor 朱华琴
Owner 浙江华铖建设有限公司