【 Weak current College 】 on indoor fire water system---Power By 【 China power house network 】

At present, in industrial and civil buildings, depending on the different fire-extinguishing medium, commonly used in fire-fighting system with fire-fighting systems, foam extinguishing systems, gas fire extinguishing systems and fire extinguishing system, etc. Fire extinguishing system mainly fire hydrant fire extinguishing systems and fire sprinkler system.
　　
A fire water tank
　　
Water is the fire extinguishing system of the important core parts and key links. Obviously, if there is no reliable stability of fire water, even in the middle of the fire pipe network system and related control devices and Terminal-fighting facilities and perfect, in the event of fire, the fire system becomes operational, the academically, unable to effect any controlled fire extinguishing. Therefore, adequate fire fire water, good quality, good performance, reliable operation of pressurized water supply equipment for fire extinguishing systems play an efficient control timely fire-fighting role is crucial.
　　
Author: liuwei

Fire water tank is mainly used to supply control and extinguish the fire in the early days of building fire water quantity, and ensure the appropriate pressure requirements. In the early stage of fire, fire cistern on the rapid spread of fire suppression, minimize personnel and property loss plays a considerable role. If the water tank capacity is too low, the shortage of cooling water, will definitely affect the initial fire fighting in a timely and effective; high or low water pressure in the tank for fighting building top-level and nearby several layers of fire is also great, low pressure water may not or cannot achieve the requirements of the adequacy of water hydrants and sprinklers required sprinkler impact strength, control and fire extinguishing efficiency. Therefore, high fire water tank of the set height should guarantee the most negative point fire hydrant hydrostatic pressure and the most negative point minimum working pressure sprayer and spray intensity. When high fire water tank pressure requirements cannot be met, you should set the supercharged facilities. When the fire extinguishing systems and fire sprinkler system with separate water tank, the tank should be guaranteed by system respectively.
　　
Fire fighting water also have certain requirements. Automatic sprinkler system with water should be clean, free from corrosion, nosuspension. Avoid water fiber fabrics and suspended solids and other impurities clogging pipe and nozzle outlet, prevent fire. Is oil pollution or other flammable combustible liquid natural water sources can not be used for fire-fighting water. In addition, in order to protect human health and safeguard the public interest to prevent water contamination, and water and fire water tank and fire water tank, water quality, it should meet drinking water standards.

Second, fire hydrants and sprinklers
　　
Fire-fighting water supply system of the terminal facilities mainly fire hydrants and sprinklers are to fire after the first time quickly and directly the water control and fire extinguishing. To get adequate fire flow rate and pressure, have enough enriched water column and fountain strength at the same time, they set the style became sufficient to decide whether they can effectively play-fighting power and achieved rapid fire extinguishing effect of important factors.
　　
Equipped with fire water in buildings, except for non-fuel unit layers, each layer should be set a fire hydrant. Fire hydrant should be located near the stairs in the aisle, and so clearly accessible locations, for fire protection design from the ground level 1.10 m under its direction to provide guidance to water or with setting fire hydrant into the wall of a 90-degree angle for easy operation and reduce local head loss, create better hydraulic conditions. Initial fire can be timely and efficient control and fight, relationship to the fire building human life and property safety. Fire fighting water supply have proved that the initial number of gun fire, a water gun fight fire control in the early days of only 40 per cent, two initial fire extinguishing water gun control rate of 65 percent. Therefore, the initial fire-fighting water gun quantity used should not be less than 2, this point is critical. Indoor hydrant, should ensure that there are 2 pistol of enriched water column at the same time get indoor any part. For all the different types of industrial and civil buildings, its features, layers and volume, fire resistance ratings, the fire risk categories, appropriate water gun full water column length should be not less than 13 m water column 7?. Water gun pressure is too large, use a hard to hold, while the flow of water gun also far exceeded the 5L/S, tank fire water may be in a relatively short period of time is used up, to fight the fire in the early days. Therefore, the fire hydrant for fire protection design of hydrostatic pressure should not be greater than, greater than 0.80Mpa 0.80Mpa, water supply system should be used in the partition. When the full water column length increases, water gun dosing is increased, and highly trained firefighters could afford water gun maximum reaction force should not exceed 20 kg, not more than 15 kg. Therefore, the fire hydrant outlet pressure of greater than for fire protection design 0.50Mpa, fire hydrant should set vacuum unit, General decompression orifice plate or pressure reducing valve, pressure relief after fire hydrant Office should still be able to meet the water gun enrich the water requirements. Fire Services lifts fire officer to enter the building to fight the fire of key facilities, elevator room is the firefighters put out the fire attack bridgehead, for ease of use fire hydrant firefighters put out the fire as soon as possible and to open up pathways to fire the elevator room should be set before the fire hydrant. High fire water tank fire water has not been used previously, the fire pump should enter the normal operation, in order to timely rapid long-distance cycle pump high pressure water supply system, temporary, each hydrant Office should be located directly on the button to start the fire pump and should be equipped with the facilities of the protection of the button. Fire hydrant should calculate the amount of space, same building should be a uniform standard of fire hydrants, water gun and hose, to facilitate the management and use. The hydrant is equipped with hose length is too long and not easy to fight the fire, as in the early days of indoor saving investments taking into account the possibility of fire operations, each root water zone should be no longer than 25 meters. High-rise building of a roof should be equipped with a pressure display device for fire hydrant to check the status of the fire pump operation and the fire service's performance. In some buildings, but also set important secondary fire extinguishing devices?? Fire Reel equipment, their spacing should ensure that a current of water can reach any part of interior surface.
　　
There are a wide variety of forms of nozzles, respectively, applicable to differentSites and systems. Closed sprinkler is an automatic sprinkling system of critical components, fire hot air heating open after sprinkling and boot the system. The reasonableness of nozzles, the nozzles can be decided in a timely manner and in accordance with the provisions, strength. Therefore, the nozzle should be arranged in the roof or ceiling under easy-to-reach fire hot air and conducive to the location of the uniform water distribution, to make the nozzle opening time heat Thermistors and open nozzle to spray water on the effective coverage of the fire. When the nozzle nearby obstructions, the distance of the nozzle and the barrier should be consistent with the relevant provisions, or additional compensation to the nozzle, spray intensity compensation for sprinkler watering is blocked and cannot place fire extinguishing water. Vertical-type, drooping sprinkler layout, including the same root distribution pipes on nozzle spacing and adjacent water distribution pipes shall be in accordance with the spacing of the sprinkler system, head flow coefficient and work pressure. Clearance height is greater than 800 mm bore and technology mezzanine with fuel, you should set the nozzle; sets the permeability of the ceiling, the nozzle should be arranged in the roof roof or ceiling under; as bevel, nozzle should be perpendicular to the ramp and identified according to the slope distance nozzle spacing. When local places to set an automatic sprinkler system, and the adjacent no automatic sprinkler system places connected by road or connected openings, should set the nozzle, in order to prevent fire spread from opening.
　　
Indoor fire water supply system is to protect the building fire safety facilities, in minimizing the loss of life and property, safeguarding public security and public interest, improving economic and social benefits has played a great role.