What is the working principle of roof fire water tank and underground fire water pool?

The roof fire water tank was used in the initial fire. Generally, according to the different fire risks of buildings, their volumes are 6 tons, 12 tons and 18 tons. Even if there is a fire, the water in the fire water tank can immediately put out the fire before the fire hydrant pump in the underground pump room is started.

The pump next to the water tank is a constant pressure pump, that is, the static pressure of the roof water tank can not meet the pressure required by the top fire hydrant to stabilize the pressure of the pipe network. When the main pump started to supply water, both the fire water tank and the pressure stabilizing pump completed their tasks and stopped supplying water.

The underground fire pool is absorbed by the main fire pump. In order to meet the demand for fire water during the fire, it is generally very large, reaching several hundred tons. Water from outdoor pipes generally enters the fire pool, and the water pump absorbs water from the pool.

Extended data:

Fire-fighting facilities that provide water for the fire brigade in fire fighting and rescue activities, on the one hand, make the fire water supply pipeline full of water, save the time to fill the pipeline after the fire pump is turned on, and win time for fire fighting. On the other hand, the pressurization and pressure stabilization system and water tank installed on the roof can ensure that the water column of the fire water gun is sufficient, which plays a decisive role in extinguishing the initial fire.

Indoor fire water tanks (including the partitioned water tanks of the partitioned water supply system) shall store the fire water consumption of 10 minute. When the indoor fire-fighting water consumption does not exceed 25L/s, after calculation, the fire-fighting water storage capacity of the water tank exceeds 12m 3, and 12m 3 can still be used. 18m 3 can still be used when the indoor fire water consumption exceeds 25L/s and the calculated fire water consumption of the water tank exceeds 18m 3.

Two fire water tanks should be used in high-rise buildings. When a water tank is overhauled, it can still maintain the necessary fire emergency water. The bottom of the water tank should be connected with a connecting pipe, and the connecting pipe should be provided with a valve, which is normally open.

The fire-fighting water tank should be shared with other water tanks, so that the water in the water tank is always in a state of flow renewal and deteriorated due to waterproofing. Other water can be supplied by measures such as siphon top drilling.

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