Fire-fighting elevators are elevators with certain functions that are used by firefighters for fire extinguishing and rescue when a fire occurs in a building. Fire elevators have high fire protection requirements and their fire protection design is very important. In reality, some "fire elevators" are ordinary passenger elevators that have operations such as returning to a preset base station or evacuation floor function, and cannot be boarded in the event of a fire.
In accordance with relevant requirements, for the main part of high-rise civil buildings, when the floor area does not exceed 1,500 square meters, a fire elevator shall be installed. More than 1,500 square meters, less than 4,500 square meters, two fire elevators should be installed. When each floor area exceeds 4,500 square meters, three fire elevators should be installed. The load of a fire elevator should not be less than 800 kg, and the plane size of a car should not be less than 2 meters x 1.5 meters. The speed of fire extinguishing elevators is calculated and determined from the first floor to the top floor with no more than 60 seconds. For example, a building with a height of about 60 meters should use a fire elevator with a speed of 1 meter per second, and a building with a height of 90 meters should use a fire elevator with a speed of 1.5 meters per second. Fire elevators usually have perfect fire protection functions. The first is to have dual power supply. In case the power supply to the elevators of the building is interrupted, the very power supply of the fire elevator can be automatically engaged and can continue to operate. Second, it should have an emergency control function, that is, when a fire occurs in the upper floors, it can accept instructions, return to the first floor in time, and no longer continue to accept passengers, only for firefighters to use. The last point is that an emergency evacuation exit should be reserved at the top of the car. If the elevator's door opening mechanism fails, it can also escape from this evacuation. Fire elevators should have an antechamber in order to facilitate smoke prevention and smoke removal and firefighters to work. Fire-fighting elevators are the main offensive route for firefighters to enter the fire in the building. To facilitate the opening of the tunnel, the fire safety risers and fire hydrants should be installed in the front room. In addition, the front room should also be equipped with fire doors to make it have fire and smoke protection.
The decoration materials in the fire elevator must be non-combustion building materials. Fire-fighting elevator power and control lines shall be waterproofed and the entrance shall be provided with slow slope waterproofing measures. There should be a dedicated telephone in the elevator elevator car, and there should be a special operation button on the first floor. If these functions are up to standard, in the event of a fire in the building, the fire elevator can be used for firefighting.
The shaft of the fire elevator shall be set up separately and shall not pass through other electrical pipes, water pipes, air pipes or ventilation pipes. Drain outlets and drainage facilities shall be provided at the bottom of the well. If the fire elevator does not reach the underground floor, the water at the bottom of the well can be discharged directly to the outside. To prevent the water from pouring back in the rainy season, a single-flow valve should be installed at the position of the outer wall of the drain. If it cannot be discharged directly outside, a pool of not less than 2 cubic meters can be opened at the bottom or side of the well, and the water from the pool can be pumped outdoors with a pump with a displacement of not less than 10 liters per second.
This article label: Fire elevator Elevator knowledge Elevator safety Elevator operation Passenger elevator.
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