Novel bulkhead gate device capable of eliminating gate front vortex

Abstract

The invention belongs to the field of water conservancy and hydropower and relates to a novel bulkhead gate device capable of eliminating a gate front vortex. Two curved barriers which are as high asa gate and are tightly attached to the surface of the gate are vertically arranged on the upstream face of the gate, and the curve request of the curved barriers is made. In the arrangement mode, thedouble-curve vortex eliminating barriers can achieve the vortex eliminating effect under the conditions of different immersing water depths and different gate opening degrees, the structure is simple,arrangement is convenient, overhauling and maintenance are easy, the flow regime of the water flow in front of the gate and the gate flow passing capacity cannot be affected, no new harmful vortex isintroduced, and no extra surface swirl nor surface indentation vortex is generated. Therefore, the phenomena that due to the existence of the gate front vortex, the flow passing capacity is reduced,water flow turbulent fluctuation is intensified, water building vibration is caused, the flow regime of the water flow is deteriorated, and cavitation and cavitation erosion are caused are reduced, and engineering safe operation is guaranteed.

Description

technical field [0001] The invention belongs to the field of water conservancy and hydropower, and relates to a new type of flat gate device that can eliminate the vortex in front of the gate. The concave vortex on the surface can improve the flow state of the water flow, ensure the flow capacity, avoid the damage caused by the strong flow-induced vibration of gates, gate piers and other hydraulic structures due to the generation of harmful vortexes, and reduce the damage caused by downstream hydraulic structures or hydraulic machinery. The cavitation cavitation phenomenon caused by the air carried by the vortex ensures the safety of the project. Background technique [0002] In the prior art, the current research on vortex elimination devices is mostly focused on the water inlets of power stations and flood tunnels, etc., and the water inlets have a large degree of submersion and a fixed structure. In some completed and ongoing water conservancy and hydropower projects, it...

AI Technical Summary

Problems solved by technology

For example, the vortex elimination floating row, because it is not fixed, when the water level in front of the gate fluctuates greatly, it will hit the gate, which will cause damage to the floating row itself and the gate, causing maintenance and repair problems; due to the large size of the vortex elimination frame, the water inlet is lowered The flow capacity; the vortex elimination grille is fixed on the structure and can only eliminate the vortex in a specific water level range

It is very difficult to arrange these vortex elimination structures in front of the gate, and the range of submerged water depth in front of the gate varies greatly. It is difficult for the vortex elimination structure fixed at a certain elevation to ensure the effective water level range of vortex elimination

Flat gates also have requirements for opening and closing, and downstream flow at different openings. This type of vortex elimination building has a complex structure and a large size, which easily affects the flow capacity, so it is not suitable for eliminating the vortex in front of the gate.

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