Introduction

A complex building on the ground 3 floors, building height 17m, in the first floor of the building set up a fire control room, fire control room using Class B fire door to the first floor of the hall, the fire control room set up two fire alarm controllers, a fire linkage controller, graphic display devices, user information transmission devices and fire emergency All fire-fighting equipments are installed in the fire control room. All fire-fighting equipment in the fire-fighting control room is arranged in a zigzag pattern. Zigzag row, the equipment face plate from the wall before leaving 2.5m operating distance, behind the equipment to leave 1.2m channel, the other side of the channel is arranged with the monitoring equipment of the complex.

Complex building floor area of about 150m?, building height of 4.5m office are installed in each of the two point-type smoke detector fire detectors, kitchens, restaurants, karaoke 0K halls and other places to install two point-type smoke detector fire detectors and a point-type temperature detector, point-type temperature detector from the air-conditioning air supply outlet distance of 1m; the first floor of the first floor of the gas boiler room in the ground to install a combustible gas detector for detecting natural gas leaks. The gas boiler room on the ground floor is equipped with a combustible gas detector for detecting natural gas leakage.

The building is equipped with a fire emergency broadcasting system that is used in conjunction with background music, and the bottom edge of the broadcasting loudspeaker is 2.2m from the ground, which is automatically switched to emergency broadcasting in case of fire. In case of fire, the fire accident broadcasting is connected in the order of evacuation, and the fire on the first floor is connected to the broadcasting on the first and second floors first, and the fire on the second floor and above is connected to the broadcasting on the fire floor and the upper and lower floors first.

The building is equipped with ventilation and air-conditioning with pressurized air supply and smoke control system and mechanical smoke control system, and the air supply fan and smoke control fan are set up in a separate room, which is separated from other parts by the fire-resistant partition wall with fire-resistant limit of 2.00h and the floor slab with fire-resistant limit of 1.50h as well as the fireproof door of Grade B. When the two floors in any floor of the building have fire, the first one is connected to the first and second floor broadcasting. When two detectors alarm in any floor of the building, it will start the air supply outlet, smoke outlet, air supply fan and smoke exhaust fan of the floor at the same time within 15s, and close the ventilation and air-conditioning system which is not related to smoke exhaust within 40s.

The fire shutter of the evacuation passageway, after receiving the action signal of any two independent smoke detectors in the fire protection sub-area, the shutter descends to the floor.

According to the above material, answer the following questions: (***20 points)

1. Point out the fire detector, emergency broadcasting, and other fire alarm system facilities in this case of the complex building set up problems, and explain the reasons.

2. Point out the case of emergency broadcasting and fire shutter fire linkage control design problems, and explain the reasons.

3. pointed out that the case of smoke control fire linkage control design problems, and explain the reasons.

4. Point out the fire control room, smoke control room and other room settings in this case there are problems, and explain the reasons.

Reference Answers and Explanations

1. Answer 1) The installation of two smoke detectors in an office with a floor area of 150m? does not meet the requirements. Reason: the floor area is more than 80m?, room height is not more than 6m, a smoke detector protection area A = 60m?, correction factor K = 1, each room should be set up at least N = S / (K? A) = 3 smoke detectors.

2) the kitchen in the complex to install smoke detectors, do not meet the requirements. Rationale: Temperature-sensitive fire detectors should be installed in the kitchen.

3) gas boiler room on the ground to install a combustible gas detector for the detection of natural gas leakage, does not meet the requirements. Rationale: Combustible gas detectors that detect gas density less than air density should be set on the top of the protected space.

4) point-type temperature-sensitive fire detectors from the air conditioning air supply distance of 1m, does not meet the requirements. Rationale: point-type detector from the horizontal distance of the air conditioning outlet should not be less than 1.5m.

5) The bottom edge of the broadcasting speakers from the ground height of 2.2m, does not meet the requirements. Reason: wall-mounted speakers should be more than 2.2m from the ground height of the bottom edge.

2. Answer 1) fire, according to the order of evacuation connected to the fire incident broadcast, the first floor of the first floor fire first connected to the first floor and the second floor of the broadcast; second floor and above the fire first connected to the fire floor and the upper and lower floors of the broadcast, does not meet the requirements. Reason: The linkage control signal of the fire emergency broadcasting system shall be issued by the fire linkage controller. When the fire is recognized, it should be broadcast to the whole building at the same time.

2) evacuation corridor fire shutter, receive any two independent smoke detectors in the fire protection sub-area of the action signal, the shutter down to the floor, does not meet the requirements. Reason: the evacuation channel set up on the fire shutter linkage control should meet in the fire protection sub-area to receive any two independent smoke detectors or any one of the smoke detectors specifically used to link the fire shutter alarm signal linkage control fire shutter down to the floor from the surface of the 1.8m; any one of the fire shutter specifically used to link the fire shutter temperature-sensitive fire detectors should be linked to control the alarm signal fire shutter down to the floor surface. floor surface.

3. Answer when the building of any floor two detectors alarm, that is, within 15s at the same time to start the floor air supply, smoke exhaust, supply fan, exhaust fan, and in 40s to close the ventilation and air-conditioning system has nothing to do with smoke exhaust, does not meet the requirements.

Rationale: The smoke control system linkage design should meet the two independent fire detectors or a fire detector in the fire protection division where the pressurized air supply outlet or a fire detector and a manual fire alarm button alarm signal, as the air supply opening and pressurized air supply fan to start the linkage trigger signal, and should be linked by the fire linkage controller in the front room of the relevant layer within 15s to link the control of the need for pressurized air supply place The pressurized air supply opening and pressurized air supply fan start.

Smoke exhaust system linkage control design should meet, should be the same smoke partition of the two independent fire detector alarm signal, as the smoke vent, smoke window or smoke valve open linkage trigger signal, should be the smoke vent, smoke window or smoke valve open the action signal, as the smoke exhaust fan start the linkage trigger signal, should be linked to open the corresponding smoke partition within 15s all the smoke exhaust valve, Smoke vent, smoke exhaust fan and make-up air facilities, and should automatically close the ventilation and air conditioning system unrelated to smoke exhaust within 30s.

3) equipment behind the 1.2m channel, the channel on the other side of the arrangement of the building's monitoring equipment, non-compliance. Reason: fire control room shared with other weak power systems in the building, fire equipment should be set up centrally, and there should be a clear interval between the equipment and other equipment.

4) supply fan and smoke exhaust fan is set in a separate room, the use of fire-resistant limit of 2.00h fire partition walls and 1.50h floor and Class B fire doors and other parts of the separation, non-compliance. Rationale: The air supply fan and smoke exhaust fan should be separately set up in a special machine room, and the door on the partition wall should adopt Class A fire door.