An anti-vortex column anti-vortex device and method for the rear wall of a closed water inlet pool

Abstract

The invention relates to a vortex-eliminating device and method for an anti-vortex column on the rear wall of a closed water inlet pool, comprising a closed water inlet pool and a water suction pipe, one end of the water suction pipe placed in the closed water inlet pool is provided with a trumpet tube, There is a bell mouth on the top; an anti-vortex column is installed behind the horn tube, the side of the anti-vortex column facing the horn tube is the front plane, the side facing away from the horn tube is the rear plane, and the two sides facing the side wall of the closed water inlet pool are curved surfaces , the width of the front plane is smaller than the length of the rear plane; the length of the rear plane of the anti-vortex column from the rear wall of the closed water inlet pool is 0.12 to 0.21 times the diameter of the bell mouth; the height of the anti-vortex column is 1.8 to 1.8 times the diameter of the bell mouth 2 times. Through the present invention, the water flow at the rear wall of the water inlet pool is separated by the anti-vortex column, and the water body at the position where the vortex occurs is filled, the water body is broken up, the water body is recombined, and the vortex velocity of the water flow is reduced, so as to prevent and control the closed water inlet pool The role of wall vortices.

Description

technical field

[0001] The invention relates to a vortex elimination device for a vortex prevention column on the rear wall of a closed water inlet pool and a method thereof, and belongs to the technical field of pump station engineering design. Background technique

[0002] The closed inlet pool is to set a concrete cover at the position of the water pump beam of the open inlet pool to seal the open inlet pool, reduce the free water surface, avoid setting up inlet pool structures, reduce the flow disturbance in the pool, and prevent the generation of surface vortices. . However, the prevention and control effect of the Coanda vortex in the inlet pool is not obvious. The rear wall vortex is the most harmful in the attached wall vortex of the closed inlet pool. After the rear wall vortex is generated, it enters the horn tube, which makes the inflow in the impeller uneven and affects the hydraulic efficiency of the entire pump station. More serious is the rear wall vortex. T...

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