【 Weak current College 】 reasonable distribution of tall buildings fire water

Keywords: outdoor fire water outdoor water usage for internal fire water indoor fire

1. introduction

Fire water usage is divided into outdoor fire water and fire water, indoor outdoor fire hydrant water is the water, indoor fire hydrant water including water, indoor automatic sprinkling water, indoor water consumption and indoor water. foam Interior of the fire water systems relatively independent, each subsystem to set fire pump adapter, fire pump adapter, located in the outdoor and indoor corresponding fire protection subsystems connected to pass, as outdoor fire engines to indoor water supply facilities.

The tall buildings design fire protection standard (hereinafter referred to as "the regulations") on the inside and outside the fire water consumption are clearly defined, but from the outside through the fire pump adapter to indoor conveying fire flow was not reasonable. Pursuant to the regulations of law, a fire pump adapter with a fire hydrant and a fire engine. According to this view, a more than 80 metres of a tall building (except residential), at least to set eight fire pump adapter and 11 hydrant, eight fire pump adapter and 8 indoor hydrant specialized supply level area fire hydrant system and automatic sprinkler system with water, this part of the water at least 110L/S; three other hydrant supply 30L/S outdoor fire water. The regulations of section 7.3.6 stipulates that the number of outdoor hydrant should be determined by the hydrant water consumption. This and the previous version is incompatible. The foregoing indoor fire water demand has been considered in the indoor, outdoor and then increase this portion of the content is repeated, is repeating design is necessary, debatable. If you consider increasing input from outside to inside of this part of the water, indoor and outdoor fire water consumption calculation should be: indoor fire water X2 + outdoor fire water. The resulting tank volume, number, indoor hydrant network layout, and other changes. If you do not increase this portion of the water, this part of the water and where to? author by design practice to fire the rational allocation of water quantity problems on their own point of view.

2. basic views

High-rise building outdoor fire water consumption for the high-rise building outdoor fire and fire-fighting, fire engines, from the fire hydrant water, in the building perimeter (four weeks) for fire suppression. The number of outdoor hydrant should under the doctrine of outdoor fire flow and uniform layout in buildings around the fire engine can be easily reached.

High-rise building indoor fire water consumption (its value as the doctrine of "requires consideration) should be divided into two parts, each share of total fire water room 1/2, part of which is indoor fire pump water, another part of the hydrant supply, referred to as" outdoor "for internal fire hydrant, fire hydrant to distinguish the hydrant, fire hydrant, located in the building of pump adapter. Indoor water consumption of the various independent system uses the distribution method for fire flow. "Outdoor for water hydrant" within the municipal network supply, pressure requirements with General hydrant, its quantity according to project content according to specification of indoor water fire-fighting system.

Through these improved fire flow distribution, indoor fire control pump of water supply can be significantly reduced, indoor fire pipe network and corresponding facilities also changed.

3. practical analysis

In practice, fire resistance, high-rise buildings by a fire point, indoor fire fighting facility focuses the effective initial fire extinguished, the fire extinguishing time period generally 0.5-1.0 hours. The so-called a fire point is at the same time open two fire hydrant (there are fire extinguishers, etc.), automatic sprinkler nozzle General considerations on 4-10. If you put in time, when the above facilities open enough to extinguish the fire in the early days. Fire prevention is key to preventing and eliminating the anti-, fire-fighting facilities is not that much, but in essence, is the usual maintenance management, guarantee good performance, the facilities of the key moment was opened, used, plus the basic quality requirements of the persons, if such a condition, not vulnerable to fire, even if there is a fire, personnel and facilities fully effective, in the early stage of fire can be extinguished, and otherwise more water. If non-fire fighting professionals in fire early can not control the fire, the fire continued to expand, this requires fire professionals help, this time from outdoor water make-up in indoor fire, firefighters continue to fight, indoor and outdoor facilities of water, all play a role.

The author believes that in reality the indoor fire facilities all requirements for water are placed in construction of fire pump is not suitable, because:

⑴ indoor every cargo, initially is not possible to provide with all the fire pumps, fire pumps water start, due to the large quantity of water supply, water consumption, resulting in extra-high voltage, easily damaged pump, motor and network related facilities;

⑵ fire pump in use, due to long idle, its quality good rate cannot be guaranteed;

⑶ power and related facilities of quality good rate cannot be guaranteed;

⑷ General fire pump house located in the basement, so the fire pump or fire control crisis room, fire sparks may interrupt the work;

⑸ fire directly by fire from an outdoor water supply, their safety, maneuverability and stronger than ever.

⑹ direct use and rely on untrained non-professionals that put out the fire, inefficiencies, weak security, short time of successful mastering will be greatly diminished.

4. concluding remarks

Fire water should be divided into three parts:

(1) outdoor fire water pipe system from municipal, responsible for building outdoor entered fire extinguishing;

(2) water for fire fighting in the outdoors: remove from the municipal network, responsible for building fire extinguishing;

(3),Water in fire: from building private fire pump output for indoor fire fighting facilities provide water for indoor fire.
To time method assignment fire water, more than ever is alleviate the buildings means indoors fire facilities, and improve the safety of fire-fighting.