Submersible sewage pumps for buildings use

Drainage pumps used in buildings include submersible sewage pumps, sewage pumps, vertical sewage pumps and horizontal sewage pumps. As the general site within the building is small, the displacement is not large, the drainage pump can give priority to the use of submersible sewage pump and liquid sewage pump, liquid sewage pump which is generally used in important places; vertical sewage pump and horizontal sewage pump required to set the interval Seismic base, self-irrigation water, and occupy a certain venue, it is less used in the building.
    Sewage pump flow should be designed according to the life of drainage design flow; when a displacement adjustment, according to the maximum flow of life drainage selected. Fire elevator drainage pool within the drainage pump flow rate of not less than 10L / s. Sewage pump lift by height, pipe loss calculation is determined, then add a certain free head. Free head should be used 0.02 ~ 0.03MPa. Sewage pump suction pipe and outlet pipe flow rate should not be less than 0.7m / s, and should not be greater than 2.0m / s.
    Public buildings should be in each living drainage pool as a unit set up a standby pump, usually should be interactive operation. Basement, equipment room, garage ground floor drainage, if two or more than two sets of drainage pumps can not use the pump. When the collection pool can not be set up accident drains, the water pump should have uninterrupted power supply; when can close the water inlet pipe, may not have uninterrupted power supply, but should set the alarm device.
    When lifting sewage with large impurities, waste water, different catchment submersible sewage pump out of the water pipe should not be combined to discharge; when upgrading the general wastewater, according to the actual situation of different sinks diving sewage pump out of the water pipe combined discharge .
    When two or more pumps share a single outlet, install valves and check valves on each pump outlet. A single pump drainage may have inverted, the check valve should be set. Do not allow pressure drainage and construction of gravity drainage pipes combined discharge. When the submersible sewage pump contains large debris to enhance, the submersible sewage pump should be equipped with a crushing device; when upgrading with more fiber waste water, should adopt a large channel submersible sewage pump.
    When the submersible sewage pump motor power is greater than or equal to 7.5kW or outlet pipe diameter greater than or equal to DN100, the pump can be fixed with auto-coupling device; when the submersible sewage pump motor power is less than 7.5kW or outlet diameter is less than DN100, Mobile installation. Sewage pool with submersible sewage pump drainage, the pump should be set to self-coupling device to facilitate pump maintenance. Drainage pump should be able to automatically start and stop and on-site manual start and stop. Multiple pumps can be run alternately in parallel, but also can be put into operation in stages.