Device and method for improving flow state of inverted π-shaped dam in forebay of pumping station

Abstract

The invention relates to a device and a method for improving the flow pattern of an inverted Pi-shaped dam of a pump station front pond. The device comprises a front pond and a flow deflector arranged on the rear part of a return flow zone in the front pond, wherein the front part of the front pond is connected with an inlet culvert; an intake pond is arranged on the rear part of the front pond. The device is characterized in that the flow deflector is the inverted pi-shaped dam; the inverted pi-shaped dam is provided with a similarly inverted letter Pi-shaped section vertical to the water flow direction; the distance between the inverted Pi-shaped dam and the intake pond is 0.2-0.4 time of the length of the front pond; the inverted Pi-shaped dam is formed by a lower dam and two upper dams symmetrically arranged on the lower dam; the lower dam of the inverted Pi-shaped dam is in a cuboid shape; the length of the lower dam is equal to the width of the front pond; the width of the lower dam is 0.5 time of the water depth in the front pond; the height of the lower dam is 0.4 time of the water depth in the front pond; each upper dam of the inverted Pi-shaped dam is in a cuboid shape; the length of each upper dam is 0.1 time of the width of the front pond; the width of each upper dam is 0.5 time of the water depth in the front pond; the height of each upper dam is 0.4 time of the water depth in the front pond. Through the device and the method for improving the flow pattern of the inverted Pi-shaped dam of the pump station front pond provided by the invention, the water intake condition of a water pump is improved, and the performance and the stability of a pump station are improved.

Description

technical field [0001] The invention relates to a water conservancy project facility, in particular to a flow state improving device and method for an inverted π-shaped dam in a forebay of a pumping station, and belongs to the technical field of water conservancy projects. Background technique [0002] The water intake forebay is a building connecting the diversion canal and the intake basin in the pumping station. The quality of its design is related to the safe and stable operation of the pumping station. Because the flow state of the water flow in the forebay is affected by many factors, the two sides of the forebay are in the recirculation zone, which will affect the flow state of the water in the inlet pool, which will affect the performance of the pump, and even cause cavitation and vibration of the pump in severe cases. , endangering the safety of the pumping station. At the same time, the existence of the backflow zone will cause the problem of sediment deposition o...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the forebay of the existing pumping station by setting an inverted π-shaped dam to solve the problems of backflow and stagnation in the forebay, improve the water inlet conditions of the water pump, and improve the performance and operation stability of the pumping station

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