Views:0 Author:Site Editor Publish Time: 2020-07-28 Origin:Site
fire fighting pump is basically composed of impeller, pump body, pump shaft, bearing, sealing ring, motor and so on. The fire fighting pump is an important part of the water fire extinguishing system. Its characteristic is that it is usually not used for a long time. Once used, it will be 100% effective. Due to the long-term idle state and the humid environment of the pump room, the fire fighting pump shaft and Impeller corrosion, rust and electrical components can not be used normally, even in the event of a fire, the fire fighting pump can not operate normally, can not extinguish the fire, endangering the safety of people's lives and property.
fire fighting pump performance and test requirements
Can generator power supply be used for fire fighting pump debugging?
fire fighting pump control voltage problem
The performance of fire fighting pumps should be higher than that of domestic pumps and production pumps, but the current specifications of our country do not make detailed and specific regulations on the performance and test requirements of fire fighting pumps, which makes the selection of fire fighting pumps unfounded , A variety of problems have arisen. The performance requirements of the US NFPA20 for fire fighting pumps are: the maximum flow of the fire fighting pump should be 150% of the design value, the head should not be less than 65% of the selected working point, and the head when the pump is turned off should not be greater than 140% of the selected working point The flow rate of the stabilized pump is 1-2L / S, and the head is 1.1-1.2 times of the fire fighting pump. At the same time, it is stipulated that a flow meter for measurement should be provided on the outlet pipe of the fire fighting pump. The flow meter should be able to test 175% of the selected flow of the water pump. The fire fighting pump should be provided with a pressure gauge with a diameter greater than 89 mm on the outlet pipe. It is recommended that relevant departments refer to American standards to provide more targeted and clearer requirements for the design and selection of fire fighting pumps in my country, so as to have a basis for the selection and testing of fire fighting pumps.
Yes, but the power supply voltage of the generator needs to be stable, and the voltage and frequency must not fluctuate too much.
Article 22.214.171.124 of the Civil Code stipulates that: the control circuit of the button for starting the fire fighting pump and the control signal of the start signal light set in the fire hydrant box shall adopt a safe voltage below 50V. Article 24.9.11 stipulates that the DC operating power supply voltage of the fire linkage system shall be 24V. This is mainly to prevent the fire hydrant box and water, water guns from being electrically injured and firefighters when the fire hydrant is used (this kind of injury accidents have been heard). However, in the actual construction and some reference materials, the operating power supply voltage of the fire hydrant button is still connected to AC 220V. As mentioned earlier, "Atlas" made such a mistake on the same page.
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