A new double-stage flexible flapper device and its operation method for bidirectional pumping stations

Abstract

A novel double-stage flexible flapper device suitable for a bidirectional pumping station and its operating method, comprising a central shaft, a deflector, a double-stage flapper, a large spring, a magnetic plate and a water pump top cover. The two-stage flexible flapper device is a detachable structure. Each flapper is composed of two separate flappers. The outer side of a single flapper adopts a 1 / 4 circular surface shape and is set directly above the water outlet bell mouth. It is connected to the central axis and can move spirally around the central axis, and the weight of the second-stage flap door is greater than that of the first-stage flap door. There are magnetic plates in the single flap door and the top cover of the water pump, and the single flap door and the top cover of the flap door Large springs are arranged obliquely between them. The whole device realizes graded outflow and graded cutoff through the balance relationship between the flapper's own weight, spring force (pull force), magnetic plate attraction and water pressure. The invention has a simple structure and a novel concept, and can ensure that the flap door can be opened smoothly and in time when the machine is turned on and the water flow can maintain a good flow state, and the flap door can be closed in time by gravity when the machine is turned off.

Description

technical field [0001] The invention relates to a drainage and irrigation two-way pumping station which is opened when the pump station is started and which is closed when the pump station is shut down. Specifically, it relates to a novel double-stage flexible flapper device and its operating method, belonging to the technical field of water conservancy engineering. Background technique [0002] In some areas, because the water level of the inland river is not much different from that of the outer river, and droughts and floods alternate frequently, the pumping stations built along the coast of the area are often required to have two-way pumping functions, which can both irrigate and drain waterlogging. Therefore, double-channel, two-way pumping stations with low head, large flow, low investment, and easy installation and maintenance, and corresponding vertical shaft open axial flow pump units (two-way channel pumping stations) came into being. However, during the start-up p...

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Problems solved by technology

[0003] In view of the above-mentioned solution to the operation of the two-way pump station, using the water outlet gate to start and stop by pumping circulating water first takes a long time and the process is cumbersome, which affects the safety and reliability of the pump station operation. It is difficult to open with too much force, and there will be problems such as vibration when shutting down

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