Fire water supplied by most fire sources requires a fire pump to pressurize it to meet the water pressure and water requirements of the fire. Pump set due to improper maintenance failure will inevitably affect the fire and rescue, causing unnecessary losses. Here, I encountered in the work of several fire pumps to talk about personal understanding of the issue, in order to find fault. In the municipal pipe network to meet the indoor and outdoor fire water on the premise, I do not know whether to consider depending on the building for different purposes to determine whether to set the fire pump. That is, in the factory buildings and large public buildings, the establishment of a fire pump to promote self-help capacity to some extent, while in the general residential area, it allows no fire pump, the fire pump using water pump adapter in the outdoor water After all, even if a fire pump is installed in a residential building, residents may not be able to use it properly. Found in many design drawings: fire pump for power distribution lines, control lines and more wear PVC pipe to protect, and from the ceiling within the line. I think this alignment method is defective. Although the "Construction Regulations" only require that the power distribution lines of fire-fighting electrical equipment be worn with metal pipes and no metal pipe protection is required when concealed, the "Code for Design of Electrical Buildings in Civil Buildings" (hereinafter referred to as "the Civil Regulation") 24.8. 5 requirements: fire linkage control, automatic fire control and other lines should be used flame retardant cable to wear the pipe in the non-burning body structure layer, the protective layer thickness of not less than 3cm, when it must be clear, should be on the metal pipe Take fire precautions. Article 8.2.2 of "Code for Design of Automatic Fire Alarm System" (hereinafter referred to as "automatic alarm specification") also makes corresponding provisions in this regard. We know that fire pumps still have a role to play for some time after a fire broke out, to complete the construction fire fighting efforts. Therefore, in this period of time, still to ensure the safety of the pump line. For the distribution room and the electric shaft distance farther, fire power equipment capacity larger, the line can not be concealed, you can take effective fire prevention measures laid in the ceiling. In this case should avoid the use of fire-resistant slot box, because the ceiling is also fire-prone lots, the laying of the line in the ceiling fire and unsafe, and the tank can only prevent the external combustion of the line damage, can not prevent the line box Fire caused by its own failure. Fire pumps and other important fire-fighting equipment recommended fire-resistant cable power supply to ensure that in case of fire can be affected within a certain period of time to continue to work. Fire hydrant pump has three places to start control. â‘ According to "Build Regulations" and "Fire Code for High-rise Civil Building Design" requirements, start directly in the indoor fire hydrant box. â‘¡ According to "automatic alarm specification" requirements, at the fire control room at the control. â‘¢ pump room near the fire hydrant pump control. This should be the correct treatment of the following two issues: First, we should correctly determine the fire control room, fire hydrant button and fire pump control priority issues. In general, long-distance fire control room should be dominated. However, due to the absence of a clear guideline for long-distance operation by relevant departments at present, there are many practices in engineering practice, and the rationality and operability are inevitably mixed. Some simply start and stop the pump button and / or connected to the secondary loop manually start and stop the pump button, and some simply remove the thermal relay, most of them are set in the pump room control cabinet manual / automatic transfer switch, under normal circumstances Put in automatic position. We think all these methods have some defects. Comrade Song Gaofei "On the design of fire pump remote operation," a paper proposed long-distance operation relay contacts over the switch part of the direct contact with the fire pump main contactor coil loop to achieve the direct start fire pump. We think the idea is good, not only solve the problem of direct start, but also facilitate the unified control of the control room, but also to meet the needs of the pump room control cabinet in any state can fire fire pump remotely. The second is to determine the fire pump to take what way to start. As soon as possible to put fire fighting equipment into operation to reduce fire loss, taking into account the majority of non-fire load in the fire has been cut off, fire pumps should give priority to the use of full pressure direct start mode. At present, due to the problems of high false alarm rate and operating cost of automatic alarm system, some automatic alarm systems of buildings are often not operated with sickness and are hard to play their due role. Therefore, we do not think it is necessary to advocate the use of hand newspaper instead of the hydrant button to start the fire pump.
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