Box type main beam structure capable of reducing uplift pressure of plane emergency gate of water stopping of downstream positions

Abstract

The invention discloses a box type main beam structure capable of reducing uplift pressure of a plane emergency gate of water stopping of downstream positions. The box type main beam structure comprises a box type main beam body (1) of the plane emergency gate; the box type main beam body is provided with through holes penetrating through an upper web (2) and a lower web (3), and communicating pipes (4) are arranged in the through holes; a communicating hole (6) is formed in the back wing edge of the box type main beam (1). The communicating pipes are equidistantly arranged between the upper web and the lower web of the box type main beam of the gate, the communicating hole is formed in the back wing edge of the box type main beam of the gate, and water between the upper web and the lowerweb is communicated through the communicating pipes; the water can flow into a cavity body between the upper web and the lower web through the communicating hole, the water pressure difference of theupper web and the lower web is reduced to the larger extent, and the uplift pressure born by the gate is reduced; in addition, the communicating pipes adopt oval or round structures, the upper and lower ends of each communicating pipe are inverted round angles, when the water flows, damping is lower, and the box type main beam structure is beneficial for smooth flowing of the water in the communicating pipes.

Description

technical field [0001] The invention relates to a box-shaped main girder structure for reducing the buoyancy force of an accident gate at a downstream stop water level, and belongs to the technical field of metal structures of water conservancy and hydropower projects. Background technique [0002] For the downstream emergency gate at the water level, because the bottom edge of the gate is on the upstream side, it is greatly affected by the buoyancy force of the water body, and sometimes the gate cannot be closed due to insufficient closing force, especially the gate with a box-shaped main beam structure at the bottom It is more prominent in the center, because the distance between the double webs of the box girder is large, the water pressure difference between the double webs is larger, the buoyancy force on the gate is greater, and the gate is more difficult to close, so However, the existing technology is still not perfect enough and needs to be further improved. Conte...

AI Technical Summary

Problems solved by technology

[0002] For the downstream emergency gate at the water level, because the bottom edge of the gate is on the upstream side, it is greatly affected by the buoyancy force of the water body, and sometimes the gate cannot be closed due to insufficient closing force, especially the gate with a box-shaped main beam structure at the bottom It is more prominent in the center, because the distance between the double webs of the box girder is large, the water pressure difference between the double webs is larger, the buoyancy force on the gate is greater, and the difficulty of closing the gate is greater. , the existing technology is still not perfect and needs to be further improved

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