Sewage pump is an important fire fighting and rescue equipment, fire fighting plays an extremely important role. According to our habitual thinking, overload protection should be provided for all important equipment. However, Articles 8.6.3.5 and 10.2.2.4 (3) of the "Regulations" stipulate: "For a power distribution line that causes a more serious loss than an overload due to a sudden power failure, it should not be installed Load protection electrical appliances (such as the sewage pump power supply lines), but should be installed overloaded alarm appliances. According to this provision, the sewage pump should not be installed overload protection cut off device. This is mainly due to the fact that when a fire breaks out, the need for fire-fighting water should be fully ensured because of the negligible loss of equipment from the loss of fire due to the possible damage caused by the pump overload. However, even in the actual construction of some standard construction atlas, including the current teaching materials in colleges and universities described in the sewage pump electrical diagram, the sewage pump circuit is still equipped with overload protection cut off electrical appliances, such as "Building Electrical Installation Project Atlas JD13- 318 page "high-rise building fire protection system full voltage start sewage pump control device (2)." This obviously does not meet the regulatory requirements. First, the sewage pump performance and test requirements Sewage pump and pump life and production pump performance should have higher requirements, but the current norms of our sewage pump performance and test requirements did not make more detailed provisions, resulting in Sewage pumps in the selection of no data is available, there have been a variety of problems. US NFPA20 sewage pump performance requirements are: sewage pump maximum flow should be 150% of the design value, the lift is not less than 65% of the selected working point lift, shut down the pump lift is not greater than 140% of the selected working point lift, , The regulator pump flow is 1-2L / S, head is the sewage pump lift 1.1-1.2 times. At the same time the provisions of the sewage pipe outlet pipe should be set to measure the flow meter, the flow meter should be able to test the pump selected flow of 175%, the sewage pump should be set on the outlet pipe diameter greater than 89mm pressure gauge. It is suggested that the customs authorities refer to the American standards for the design and selection of sewage pumps in our country and put forward more targeted and specific requirements so that the selection and detection of sewage pumps are well documented. Second, sewage pump regular maintenance Despite the norms, regulations clearly require fire-fighting facilities, equipment should be regularly maintained, but the sewage pump can not do regular test run, the protracted cause of the pump stuck, rust died, as a fire can not Play its due role On October 25, Guangzhou Daily reported on the topic "why 500,000 yuan of fire-fighting facilities dripped" because it disclosed that the fire-fighting facilities inside the Yidd Road Integrated Market in Yuexiu District were not maintained and could not operate normally during the fire and caused huge losses . Therefore, we recommend that the code require the use of programmable logic controller (PLC) in the sewage pump to control the pump set to achieve regular trial operation of the sewage pump in standby mode. When the fire is extinguished, it will be activated automatically to effectively stop the key points of the sewage pump Can not use the situation.
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