【 Weak current College 】 fire super high-rise building weak electricity system design features---Power By 【 China power house network 】

According to GB GB5011698 the automatic fire alarm system design code requirements, building as automatic fire alarm system of protected objects, divided into three levels, namely grade, level II. Where a building height of more than 100 metres from the building as a high-rise building, belong to the special protection of objects. The fire alarm and coordinated control system design requirements higher than general building, its technical programmes necessary subject experts. So super high-rise building fire system has those characteristics?
1 applicable design and acceptance of n/a
In accordance with the regulations, our construction height is 24 metres and the following buildings fire protection system design according to GB "architectural design fire protection standard law enforcement, 24 ~ 100 m high building according to the national standard of the tall buildings design fire protection standard law enforcement, industry and civil construction according to the defense works design fire protection standard law enforcement. National standard is a mandatory technical requirements is to constrain the owners, design, construction units and acceptance for the rulers. There are no high-rise buildings, the national standard in practical work can only reference to the relevant national and international standards, in accordance with local fire departments, in line with the spirit of safety first, try look carefully to complete the design work.
2 fire detector arrangement standard higher
In addition to General super high-rise building, top floor layers roof for flat roofs (i.e. roof slope is zero) that storey height not exceeding 6 m. Under these conditions, the general architecture of smoke detector to protect an area of 60 square meters, general protection RADIUS 5.8 m, but for super high-rise building, fire departments are often require higher standards, such as requiring protection area is 40-50 square metres, protection, strictly in accordance with the radius of the detector location forming the aspect ratio of the rectangle. Obviously, the detector's layout to close to the square layout more economic. Thermal detectors located in the basement, the kitchen and allow smoking venue on the topping-out conditions, the protection of an area of 20 square meters, protection RADIUS 3.6 m. Note that the problem often lies in building plane corners, detector protection RADIUS up to audit requirements. This class can be accommodated in the General architectural problems in high-rise is required should be strictly enforced. In addition, the transformer substation, the generator room, conveyor belt and cable bridges, in addition to the set gas fire extinguishing installations (usually in civil engineering from the owners own), you should also consider setting the type smoke cable.
3 alarm means
In addition to smoke, temperature sensors, hand report button, fire hydrant buttons, etc, high-rise buildings in the garage, kitchen should be combustible gas detector, etc. In all the important machine room (someone on duty), and in particular a layer of fire control rooms, 119 private fire protection should be provided, and the city telephone Office 119 switching equipment through, as regards the general alarm layer light, but the whole set alarm bell or buzzer, because of its manufacturing people panic and confusion, in an emergency broadcast, many not be adopted.
4 alarm detector installation site
Where more than 5 Super square meters room should be located, even bathroom detector. In addition, the staircase is the fire escape routes, should be set. Electric shaft regardless of size, the possibility for its fire, the role of an important and necessary CGI settings. Hands of the set RADIUS is walking distance 30 m, usually located in the staircases and escape routes nearby such as export to the flight from the scene is convenient alarm.
5 layers of fire-fighting arrangements taken refuge
Asylum-settings are super high-rise building of exceptional emergency measures. It is used for fire danger is people staying for high-rise, to fire-fighting capability shortfalls of (especially China). Generally every 50 meters height is set a refuge, 100 to 200 metres in height is set two asylum layer. In refuge in general no ordinary office or place of life, that is, its architectural space is only used for disaster relief emergency. But in order to resolve practical problems, and super high in order to meet the needs of the fire itself, usually in the assurance personnel avoid fire needs to set up parts of the equipment room, such as the profection positive-pressure fans, exhaust fan, air handling units, air supply unit, and asylum layer of positive pressure air intake system, multi-room independently set not less than 30 cubic meters per hour. Refuge layer exhaust fan and positive pressure ventilator used in fire, smoke at work section and the estuary of the inlet should not be affixed near placement.
Refuge for layout of smoke is also a condition of protection RADIUS is not greater than 5.8 m (such as the set temperature detector, protection area is 20 square meters), the alarm button is located near the entrance, each fire partition at least set a hand reported that each hand, the scope of responsibility is not more than 30 m radius, the distance to 1.4 metres wall installation. Super mostly Tower shape, each layer of at least one fire partitions, but usually each layer are a fire partitions.
In order to guarantee the emergency communications, refuge layer should every 20 meters a fire dedicated telephone extension or a phone jack.
6 smoke hanging wall settings
High-rise fire strictly hold a complete fire protection measures is embodied, means of diverse, complementary. The general rule under fire, the initial phase of the smoke produced large amounts of smoke to rise to the ceiling, and then spread horizontally along the ceiling. In response to this law, in the underground floors and each floor of the annex (the local General flammable) sets the vertical wall of smoke, fire, smoke hanging wall hanging (General 1.5 m) to smoke in the short time limits in the predefined area, fled towards the personnel, the fire of valuable time, slowing the rate of fire hazards in expansion. Obviously, in Super high-rise building set in the vertical wall of smoke and fire control room linkage control cabinet is connected to is very necessary.
7 fire alarm system intelligently improve
This issue is divided into two levels, both inside and outside. The fire alarm system, super high-rise building generally use intelligent address encoding detector, and small and medium-sized general building more non-encoding detector, to distinguish the building area. loop Given the large quantity of super high-rise building, area, its segmentation using area with large uncertainty and, therefore, in order to adapt to the room shape, size, use the properties of each change,Alarm circuit should stay out of 30 per cent of the amount of margin of detectors; for example, an alarm system in each circuit can connect devices 98, in the design, construction, note that each loop of the next device in the 70 or so. If the alarm system is a multi line instead of the standard have each floor area is small (less than 1000 square meters), in order to reduce the number of loops, each second and third level for an alarm circuit.
External to the fire alarm system, intelligent meaning primarily means system linkage. The general importance of high-rise buildings, its political, economic value, if the fire is not timely, the loss would be disastrous. Therefore, the use of systematic way, becomes for the initiative in time and early fire effective means. For example, the fire alarm system and security monitoring system linkage, the beginning of the fire, the fire of the camera can be rapidly transmitted to the scene of the central control room, photo frame, the duty officer can now confirm that the fire or probe to immediately take positives, smoke control, radio, positive pressure ventilation, started the fire pump, spray, 119 to the fire station alerting, reducing passenger elevator, non-fire power, and a series of emergency measures. As another example, the fire alarm system and garage management system linkage, upon discovery of fire, it can sound and light alarm, lift the import and export of railing, enable the vehicle to get out of the garage as soon as possible. In addition, the fire alarm system can and building control system, radio, hi-fi system and access control system, linkage. As long as these measures reliable deli, super high-rise building of fire can be proactively minimize the loss of some
8 electric fire shutter settings
Electric fire shutter function, starting from quarantined mainly its set location usually in the underground garage, podium business district and escalators around, as the building's fire partition boundaries. General Electric fire shutter inside and outside each have a smoke machine, temperature sensors, in addition to the control box (a) be located in the inside or outside, inside and outside also has a manual start and stop buttons from 1.4 metres out, and is located on the escalators around the electric fire shutter, smoke machine, temperature sensors are located on the outside (the layer on one side of the workspace).
From the electric fire shutter works to distinguish, can be divided into two: one for isolated, usually located in the fire partition boundaries of entrance, once the detector alarm and make sure fire, fire shutter step down to the end, while spray system began to fire district and shutter. II-for the evacuation, General evacuation channels, smoke feeling alarm after confirmation (artificial confirmation or two above detector alarm) decreased and metal shutter to distance 1.8 metres, as the fire development, elevated temperatures, temperature sensors action after fire shutter and then lowered to the ground. Two actions between the time used to escape the room personnel.
No matter what kind of electric fire shutter, in Super high-rise building in the entire part of the fire-fighting system, its actions are not stand-alone. Therefore, the electric fire shutter shutter from belong to both sides of the control box of smoke, temperature sensors, shall be and the fire alarm system and detector circuit is normally within a system.
Other important fire safety means in high-rise building including:
Fire damper. In order to prevent fire spread along the wind pipe and settings, general ventilation room lateral installation. In special cases, ventilation duct (such as air conditioning pipe) is allowed to enter or travel through electrical devices (such as power distribution unit, telephone room, central control room), and in electrical equipment room over the wall of wind pipe wall, the wall to a fire dampers, make the Fireworks between devices cannot be outgoing, also do not allow outside of fireworks import equipment.
The fire damper is normally open State, fire when early temperature once the pipe above 70 ° c, the line of fire dampers leaves in electromagnetic power of 90-degree, blocking pipes. Fire fighting over, fire dampers renewed normally open state.
Exhaust valve. Located in the exhaust pipe exhaust fan, many are located near out home outlet. Exhaust valve normally closed. Open fire in the beginning, then start the smoke exhaust fan linkage to outdoor, when the fire continues to develop, flue gas temperature reached 280 ° c, exhaust valve closes automatically (otherwise the wind help fire, a fire-side effects), and before the next time you fire remains normally closed state, similar there are fire smoke exhaust valve.
Positive pressure ventilation system. Fire personnel are not allowed to enter the elevator because the fire did not lift a forced landing into the power failure, it may remain at the scene, the ladder in the flue gas are stifled. At this point the officer should be escape stairways. Therefore, keep the staircases of positive pressure to smoke and no entry is very important. Positive-pressure fans in General in the roof, and the linkage of electric outlet. When you open fire in the beginning, start a positive pressure air blowers, stairwells, Elevator halls in positive-pressure mode.
Fire alarm system effective functioning depends on reliable sprinkler system. When the room temperature rises to a predetermined value, the spray head of glass ball is blasting and spray, this is the fire directly effective measures, in order to monitor the system to work, in spray system set flow indicator, wet alarm valve, spray valve and so on the detector, as well as to reflect the status of the spray system in central control room.
To sum up, the height of a super high-rise building features bring fire design features of the current system. In reality, the tactical fire vehicles of firefighting capacity is not possible to keep up with the development of super high-rise building, the fire protection design of high-rise buildings should be based on building construction, fire-fighting system in intelligent, efforts under the banner of improved fire detection, alarm, fighting, and other automatic functions, will proactively against fire. In addition, the fire protection system is a construction, equipment and electrical and other professional composition of the whole, the close cooperation between the professional and co-ordination arrangements are important. These should be to ensure the safety of super high-rise building basic ideas.