The multi-stage fire pump adopts special hydraulic design and structural design, so that it has a flow pressure sub-range more suitable than the ordinary centrifugal clean water pump construction fire water supply system selection, flow-pressure curve flat without hump. High reliability due to the wear-resistant, corrosion-resistant, and anti-mesh material for all parts where friction occurs due to rotation. The multi-stage pump can be equipped with dual water outlets. The pump body has high load carrying capacity, strong anti-overload capability, and agility. .
1) The structure of the pump should ensure easy on-site maintenance and replacement of parts. Fasteners and self-locking devices should not be loosened due to vibration or other reasons. 2) An arrow indicating the direction of rotation should be cast on the pump body.
3), there should be pressure gauges, vacuum gauges (except submersible pumps, deep well pumps), the accuracy of the table should not be less than 2.5.
4) The pump should be equipped with a drain tap.
5), the nominal pressure of the pump outlet flange should be able to meet the requirements of the maximum working pressure, the nominal pressure of the pump inlet flange should not be less than 1.0MPa. Flange connection size should comply with the provisions of GB/T9112-2000 and GB/T9124-2000.
6) The pump inlet should be able to withstand a positive pressure of 0.4 MPa.
The single-suction, single-stage fire pump consists of a motor and a pump. The pump and the motor are coaxial. The pump structure consists of a pump body, an impeller, a pump cover, and a mechanical seal. The inlet and outlet of the pump are on the same horizontal axis, and the caliber specifications are the same. The loading and unloading are extremely convenient and the floor space is small. The pump has a mounting base for easy installation and increased pump operation stability. The pump seal adopts mechanical, reliable sealing and no leakage. The axial force of the pump impeller balance ring to balance. The inlet and outlet flanges of the pump are designed according to the pressure of 1.6MPa, and the pipelines are conveniently matched.
Single-suction multi-stage sectional fire pump consists of two parts of the motor pump. The motor is a Y-type three-phase asynchronous motor. The motor of the pump is connected with a coupling, and the whole is a rigid connection. No correction is needed when using it. The pump consists of a stator part and a rotor part. The pump stator consists of the inlet section, the middle section, the guide vane, the outlet section, and the filler box. In order to prevent the wear of the stator, the stator is equipped with a seal ring, a balance sleeve, etc., and the spare parts can be replaced after wear. The rotor part consists of a shaft and a middle wheel. Balance drums and other components. The lower end of the rotor is a water-lubricated bearing and the upper part is an angular contact ball bearing. Most of the axial force of the pump is borne by the balance drum, and the rest of the remaining part of the shaft is subjected to angular contact ball bearings. The joint surface of the water inlet section, the middle section, and the water outlet section is tightly sealed by a paper pad. The user can select according to the need.
The direction of rotation of the pump is viewed counterclockwise from the drive end.
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