Maintenance requirements for outdoor fire hydrants
Cold area fire pool should be antifreeze measures, such as on the pond covered with soil insulation, manholes and water intake, double insulation manhole cover, etc..The fire pool has set up independently or with other common pool, when sharing to ensure fire water, fire water pool fire water in peacetime should not be used as he used to, therefore, fire water and other water use by the fire pool, measures should be taken to prevent the fire with water as he used. The following measures may be adopted in general:1. other water outlet pipes are placed on the highest fire water level of the shared pool.2. fire water and other water are separated from the shared pool and the outlet pipes are installed respectively.3. other water outlet pipe adopts siphon form, leaving the air hole at the highest fire water level. 7.3.7 basic provisions are retained in this clause. The types of outdoor fire hydrant are floor type, underground type and wall type.The ground type outdoor fire hydrant is exposed above the ground, and has the advantages of compact structure, obvious sign, convenient searching and convenient use and maintenance, but is not favorable for preventing freezing, and also affects the appearance.The underground fire hydrant can be buried in the ground according to the requirement of the frozen soil layer to prevent frost, and it does not affect the appearance, but it is inconvenient to find.Wall type outdoor fire hydrant installed on exterior wall.
In order to facilitate fighting, but also in order to fire pool from the threat of building fire, fire pool intake or water wells from the location of the building, generally less than 5m, preferably not more than 40m. But considering the design of regional or centralized high pressure (or temporary high pressure) water supply system, it is difficult to do so. Therefore, this article stipulates that the distance between fire water intake and protected buildings should not exceed 100m.
In order to make the fire pump pump suction water, the depth of the fire pool should ensure that the water pump suction height is not more than 6m.
Fire basins should be equipped with water intakes or water wells to facilitate water intake and fire fighting. The size of the water intake or water intake shall satisfy the requirements of the arrangement, installation, overhaul and normal operation of the water suction pipe.
