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October 17 15:02:19, 2024
As the general site of the building is smaller, less centrifugal pump drainage, drainage pumps can be preferential use of submersible sewage pump and submerged drainage pump, which submerged sewage pump is generally used in important places; vertical sewage pump and horizontal sewage pump Requires setting base isolation, self-filling water absorption, and occupy a certain site, it is less used in buildings. Steps / methods: drainage pump flow should be selected according to the life of the drainage design of the second flow; when there is displacement regulation, the maximum hourly discharge of life can be selected. Fire elevator pool drain pump flow rate of not less than 10L / s. Drainage pump lift by lifting height, pipe loss calculation is determined, then add a certain free head. Free head should adopt 0.02 ~ 0.03MPa. Drainage 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 used for each living drainage cistern as a unit to set up a spare pump, usually should be run interactively. Basement, equipment room, garage flushing the ground drainage, if there are two or more than two drainage pump equipment pump. When the catchment can not set the accident drain, the pump should have uninterrupted power supply; when you can close the drainage pipe, it may not provide uninterrupted power supply, but should set the alarm device. When upgrading sewage and wastewater with larger impurities, the outlet pipes of the submersible sewage pump in different sumps should not be merged and discharged. When upgrading the general wastewater, the discharge pipes of submersible sewage pumps of different sumps may be merged and discharged according to the actual situation . When two or more pumps share one outlet pipe, a valve and a check valve shall be installed on each outlet pipe of the pump. A single pump drainage may occur when the backflow should be set check valve. Do not allow the pressure drain and the building gravity drainage pipe merged discharge. Submersible sewage pump should be equipped with a crushing device when the submersible sewage pump is upgraded to contain large sundries in the pipeline centrifugal pump; and the large-channel submersible sewage pump should be adopted when upgrading the sewage containing more fibrous materials. When the submersible sewage pump motor power is greater than or equal to 7.5kW or outlet diameter greater than or equal to DN100, the pump can be used to fix the auto-coupling device; when the submersible sewage pump motor power is less than 7.5kW or the outlet diameter is less than DN100, Tube mobile installation. Sewage collection pond submersible sewage pump drainage, water pumps should be set fixed auto-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 alternately operated in parallel, but also can be put into operation in stages.