In the investigation of energy saving and consumption reduction in railway engineering, it is found that centrifugal pump equipments used in secondary water supply system of water storage pool are equipped with pump house and auxiliary facilities of ventilation and heating. When centrifugal pump works, the noise of motor air cooling is high, the filling of pump needs daily maintenance, and there are large occupied area, high energy consumption, poor working conditions and water supply facilities. The prominent problem of high construction and operation cost index. For submersible pumps installed in the water body of pipe wells, there is no need for air cooling and ventilation heating facilities, and the energy consumption is low, but when replacing and maintaining, it is very troublesome to decompose and install the riser frequently. In addition, because the motor of the energy-saving high-lift submersible pump is set at the lower part of the pump group, the position of the submersible pump intake is high and it is in shallow water. Swirling intake is easy to occur when the reservoir is used, which affects the working efficiency.
Based on the allowable use of submersible pump water supply equipment, submersible pump disc closure and skirt-piercing diversion technology are combined through submersible pump riser (casing) in the submersible pump automatic disc closure pipeline water supply device.
Submersible pump disc closer is based on the principle of automatic disc closure of "conical four convex ring disc", which makes the submersible pump and the riser non-fixed connection. That is to say, the tapered convex ring disc is inverted on the outlet of the submersible pump, and the submersible pump automatically slides into the center of the tapered four-ring disc set on the riser (casing) by self-weight to realize the non-fixed connection.
The "skirt-wearing" diversion technology of submersible pump is to set up intake diversion pipes for the annular outlet of submersible pump below the outlet of submersible pump without changing the design structure of submersible pump itself, so that the intake water flows from the bottom of submersible pump to meet the installation requirements of reducing the high position of the intake of submersible pump.