There is a pair of wedges above the additional coupling flange of the submersible sewage pump coupling device and the inlet flange of the outlet pipe seat. There is also a pair of wedges below the additional coupling flange and the inlet flange of the outlet pipe seat. The wedges below the inlet flange of the outlet pipe seat are fixed with elastic steel plates below the inlet flange of the outlet pipe seat.
When the submersible pump descends from above the water pit, the wedge card above the additional coupling flange and the wedge card above the inlet flange of the outlet pipe seat are first clamped together. Under the action of the submersible pump's self weight and wedge card slope, the two flange surfaces will stick together, and a pair of wedge cards below the additional coupling flange and the inlet flange of the outlet pipe seat will also automatically clamp together under the action of the elastic steel plate.
It can solve the problem of a large amount of water leakage between the two flanges of the coupling while facilitating the automatic assembly and disassembly of the submersible electric pump, thereby saving energy.
In addition, when the coupling device of the submersible sewage pump malfunctions, many procedures can be saved and maintenance time can be shortened. For example, without the need to disassemble the pipeline, the water pump can be lifted up from underwater through a zipper for maintenance. After the maintenance is completed, it can be placed underwater along the slide. After the water pump is in place, the water outlet of the water pump will be well connected with the inlet of the water outlet pipe under the action of the self coupling device and automatically locked
