【 Weak current College 】 on fire safety in the use of the elevator

Our tall building fire prevention code: height over 32 m in public buildings, industrial buildings and 12 storey residential buildings should set fire lift. So in case of fire, the fire service lift now very difficult to play, its security, reliability is not very high. Disturbed fire elevator reliable use a number of factors, mainly has following several aspects:
First, the impact of fire elevator reliable factors:

㈠ Fire Services lifts fire-prone. 1, fire elevator machine room are located at the top of the building, according to the specifications, from the engine room security grounds, requires an independent fire partition processing. But in fact, since cable, duct through wall gap, fire door cannot maintain the normally closed the existence of circumstances such as fire, Elevator heart device vulnerable to high temperatures, leading to paralysis. 2. fire elevator shafts according to specification, independent settings, but some of the fire service lift and passenger elevator combined well road, between the separated without effective fire protection. Since no passenger elevator room requirements, before the fire services are vulnerable to fire damage, thereby affecting "neighbor", causing fire elevator cannot normally use. 3, power supply fire elevator cable, usually by building strong electric wells road row to the top, and then use the tray into the elevator room. Although the use of fire resistant cables, there is a certain degree of fire resistance, but building fire situations difficult to permanently keep the normal power supply.

㈡ fire elevator vulnerable to smoke. 1, fire the elevator room separated without effective fire prevention, mainly former room walls with holes and fire doors could not remain closed. 2, fire the elevator room mechanical pressurization system could not function effectively. The first general fire elevator are not natural ventilation and lighting, you will need to use mechanical pressurization system to prevent smoke to enter. However, because the former room fire doors in the event of a fire, does not guarantee that close, mechanical failure of positive pressure ventilation, and mechanical pressurization outlet set location inappropriate whirlpool, elevator car piston effect, and so on of the existence, causes harmful smoke into the elevator room fire. 3. fire elevator machine room and other elevator room between the specifications called for effective fire separated, as non-fire-fire-proof requirements for elevators, since car piston effect, easily will smoke inhalation elevator machine room, from the engine room fire elevator shaft road, inhalation, into the fire of elevator car, endangering the security of the person.

㈢ fire elevator technology is also difficult to completely ensure that it is safe to use. 1, fire-proof function itself no elevator, which is a worldwide problem. Fire elevator control panel didn't have waterproof function, and all the building fire, with plenty of water to put out the fire, even under the current regulatory requirements with excellent water facilities, it is difficult to fire the elevator at the insist in course of fire suppression. 2. fire elevator control mode has not yet been unified. As a national non-harmonized standards, so there is a fire of fire services lifts fire start buttons specific to, and some of the key via a dedicated to opening of the same features; private button starts automatically forced landing, cabin to first floor door open, internal buttons can be used by firefighters use, external floor button automatically invalidated, and fire safety elevator button starts, fire elevator can still be used normally, the cabin is not forced to first floor or external floor can be used as usual, you cannot afford to fire lift usage. 3. fire lift itself no reliable safety performance.　The current use of fire no elevator mostly prevent crashes, cabin interior and no emergency escape. Produce more problems for various reasons, there are standards, there are technical problems, more design, construction, and management issues. Any link of omissions, disjointed, will affect the use of reliable fire elevator.

Second, to improve the reliability of fire elevator a few methods in the settings to use, to reliable principle, from the following aspects to be improved.

㈠ amendments improve the fire elevator technology standards, improving the reliability of the fire service lift itself. 1, clear fire elevator technology standard, unified control procedures, clear priority to fire special function, first floor, unity in the set fire to start button as special fire function switch. 2. on the issue of waterproof fire elevator can be investigated on the mapping of the corresponding technical requirements to gradually develop to waterproof the elevator. 3. additional fire elevator outage situations and layer features (Elevator car in a nearby building automatic door docking functionality), set up by mechanical means to prevent crashes and elevator car top of additional emergency escape, to ensure that fire elevator failure, personnel security in from the cabin.

㈡ adjustment current building design fire protection standard for requirements, make a fire Elevator Safety run environment. 1, improving the design of the smoke fire elevator. The current specification underlines the elevator room fire pressure ventilation to improve methods Atria air pressure to prevent smoke entered the goal. Due to the positive pressure air set location and fire doors are difficult to maintain the normally closed, this method actually smoke effect may not be ideal. Through the fire elevator shaft road air pressure effects may be more ideal, blocked flue gas into the front room, cabin results should be more obvious. 2. strengthening the elevator room of fire-blocking, drainage capacity. Although the specification on this existing requirement, but the success of the project is not applied. As a result of fire suppression required large amounts of water, very easily lead to flow into the elevator, use. It should be stressed that fire before indoor elevator, elevator to the gate has some down-slope, at the same time should be in the elevator of additional drainage channels, through the elevator shaft in private sewer water flows into the water well, to prevent water entering the fire service lift. 3. improvement of the fire service lift cable laying method. Existing ways of laying of cable is vulnerable to the threat of fire, the fire lift cable can be by Wells road distribution directly from the bottom into the elevator room indirectly to reduce the threat of fire on the cable. 4. appropriate lower architectural configuration fire lift. Due to the fire service lift to be truly effective, it requires a fairly high, and the relative concentration of high-rise building cities are equipped with 45 metres of fire a car, in order to reduce the construction cost, it is recommended that you set the standard for fire elevator, building height adjustment from 32 m to 45 m and even higher.

　㈢ increase fire elevator construction quality and fire protection of elevator operation management in work, we often find that due to construction, management are not in place, resulting in fire elevator cannot normally use, on the one hand, there is a practical, proven standards, on the other hand also to intensify fire elevator construction quality and operation management.

(Iv) strengthened on firefighters use fire elevator and an emergency escape as the capacity of training for a variety of fire service lift structure, fire-fighting capabilities action method is not very different, so it is very necessary to firefighter training that complement this lesson in order to ensure that emergency, firefighters to successfully escape from life security threats.