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Introduction to the characteristics of fire pumps and how to operate them correctly

Dec 28, 2022
A fire pump is a single suction section of a vertical centrifugal pump used to deliver water free of solid particles, whose physical and chemical properties are similar to water in liquid. It is mainly used for pressurized water supply in fire protection systems, and can also be used for industrial water supply and drainage. The flow rate of the conveying liquid is in the range of 5-80 L/s, the pressure range is 0.2-0.2 MPa, the power range is 1.5-200 kW, and the diameter range is φ50-φ200 mm.

Main application: The vertical fire pump is mainly used in pipeline pressurization fire protection system. It is also applicable to industrial and urban water supply and drainage, high-rise building pressurized water supply, long-distance water supply, heating cold and hot water cycle pressurization, bathroom, boiler, air conditioning and refrigeration system Water delivery and supporting equipment, etc. new vertical multi-stage fire pump, including inlet, impeller, shaft, middle, water section, guide vane, impeller is set on the guide vane and discharge through the main shaft; guide vane is set on the middle part. Outlet section flow The channel is in the shape of a volute, and the final impeller is directly installed in the volute.

The new vertical multi-stage fire pump is not installed at the end of the guide vane in the water, and the water level at the end of the impeller is directly discharged to the outlet section of the spiral flow channel, and then passes through the outlet. It can improve the flow state of the water, reduce energy loss, and increase the efficiency of the pump. Efficiency, more beneficial is that it can greatly reduce the vibration and noise of the pump. Fire pumps are mainly used in pipeline pressurization fire protection systems. They can also be used in industrial and urban water supply and drainage, high-rise building pressure water supply, long-distance water supply, heating, toilets, boilers Cold and hot water cycle pressurization, air conditioning and refrigeration system water supply and supporting equipment, etc.

      The preparations that the fire pump needs to make before work first depends on whether the motor steering is correct. This can be seen on the mark on the fire pump body. The time should be short to avoid wear and tear. When using it, open the exhaust valve and wait until When the liquid occupies the entire pump body, it is closed. If it is a high-temperature type, it needs to be preheated. This is to ensure uniform heating.

Second: Start: Close the pump outlet valve. Fully open the pump inlet valve. Start the motor and observe whether the pump is running correctly. Adjust the conditions required for the outlet valve to open. For example, the user is equipped with a flow or pressure gauge at the outlet of the pump. By adjusting the outlet When the valve is opened, the performance parameters of the fire pump should be listed at the rated point. If the user does not have the outlet flow or pressure gauge of the fire pump, it should be opened by adjusting the outlet valve; the measurement of the fire pump motor current makes the motor run at the rated current, otherwise it will cause damage. The pump is overloaded (i.e. high current operation, causing the motor to burn out) and the outlet valve is opened. The right side is the relevant condition of the small line. Check the leakage of the shaft seal, the rating

The leakage of the aluminum mechanical seal should be less than 3 drops/min. Check the motor, and the bearing temperature is below 80. C. Close: Close the outlet pipe valve. Stop the motor. Close the inlet and outlet valves. If the valve stops for a long time, the liquid in the fire pump should be discharged null.

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