Special-shaped thin plate type backflow eliminating device in box-type bidirectional flow channel

Abstract

The invention relates to a special-shaped thin plate type backflow eliminating device in a box-type bidirectional flow channel. The device comprises an inlet passage, an outlet passage and a pump arranged between the inlet passage and the outlet passage, wherein the outlet passage is arranged on the upper part of the inlet passage, an impeller is arranged in the pump, a bell mouth of the inlet passage is arranged at one end of the pump facing the inlet passage, and a bell mouth of the outlet passage is arranged at one end of the pump facing the outlet passage; At both end of that water inlet passage and the two end of the water outlet passage, a partition pier is arranged, a special-shaped thin plate type backflow eliminating device is arrange on both sides of the partition pier, and a plurality of permeable holes are arranged on the special-shaped thin plate type backflow eliminating device; In accordance with that invention, A special-shaped thin plate type backflow eliminating device is arranged in the inlet and outlet water channels, As that wat flow in the inlet channel enters the blind end of the water inlet channel, the backflow eliminating device breaks the original water body structure and hinder the formation of the backflow area; the special-shaped thin plate backflow eliminating device is provided with a square water permeable hole, does not hinder the normal flow of the water flow, and can play a certain role in guiding and rectifying the water flow.

Description

technical field [0001] The invention relates to a special-shaped thin-plate type backflow elimination device in a box-type two-way flow channel, which belongs to the technical field of water conservancy engineering design. Background technique [0002] In the area along the river, due to the influence of natural conditions, in order to resist disasters such as drought and flood, there are nearly a hundred fixed low-lift pumping stations for flood control and disaster reduction. Among them, in order to meet the needs of agricultural irrigation and urban drainage at the same time, low-lift pumping stations along the river often use box-type two-way flow channels. The box-type two-way flow channel has a special structure. When the machine is turned on and running, there is always a blind end in the water inlet and outlet channels. Under non-design conditions, the backflow at the blind end is more serious, and because the outlet channel is relatively short, the backflow intensi...

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Problems solved by technology

[0004] At present, researches at home and abroad generally find that the blind-end backflow of the box-type two-way runner has a greater impact on the unit, and there are few studies on how to reduce or eliminate the blind-end backflow area and improve the flow state in the runner

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