The relevant codes I refer to in this design are: Code for Lightning Protection Design of Buildings (GB50057-94, 2000 edition); Code for fire protection design of high-rise civil buildings (GB 50045-95,2001version); Technical Specification for Lightning Protection of Building Electronic Information System (GB 50343-2004); ); Code for Engineering Design of Building and Building Integrated Wiring System (GB/T 50311-2000); Code for Design of Automatic Fire Alarm System (GB 50116-98); Code for Architectural Design of General Hospitals (JGJ 49-88); Technical specification for CATV system engineering (GB50200-94).
In this design, the national architectural standard design atlas referenced by the author is: 00dx001; Fire alarm and fire fighting linkage 99SX501; Atlas of weak current engineering design and construction of intelligent buildings 97x700 Atlas of intelligent integrated design of buildings 03x801-1; Atlas of engineering design and construction of integrated wiring system 02x101-3; Electrical shaft equipment installation 04D70 1- 1.
The weak current system in this design includes: automatic fire alarm and fire linkage control system; * * * Use antenna TV system; Broadcasting system (including background music and fire emergency broadcasting); Ward call system; Integrated wiring system (including computer network and communication system). The mobile communication signal coverage system is designed and installed by the telecommunications department, which is not within the scope of this design.
A, automatic fire alarm and fire linkage control system
Classification of objects protected by the system This building is a class I fire-proof building, and the protection level of automatic fire alarm system is set at level I, which is a centralized alarm system.
The system consists of automatic fire alarm system, fire linkage control system, fire emergency broadcasting system, fire communication system, elevator monitoring system, non-fire power cut-off control system and so on. A margin of 15% ~ 20% shall be reserved for the total address codes of the system. Fire Control Room The fire control room of this project is located on the first floor, with doors leading directly to the outside.
The fire control equipment in the fire control room consists of fire alarm control host, linkage console, CRT display, printer, emergency broadcasting equipment, fire communication equipment, elevator monitoring panel and power supply equipment.
The fire control room can receive fire alarm signals from smoke detectors, temperature detectors, flame detectors, combustible gas detectors and other detectors, as well as action signals from water flow indicators, maintenance valves, pressure alarm valves, manual alarm buttons and fire-extinguishing plug buttons. It can display the water level of fire pool and fire water tank, and display the power supply and running state of fire water pump. It can control all fire-fighting related equipment in linkage.
The fire control room to the weak current well is laid in the ceiling with metal trunking. In the plane layout, also pay attention to not allowing electrical lines unrelated to the fire control room to pass.
The fire control room is equipped with a special equipotential bonding terminal box and a special grounding trunk line, which are led to the general equipotential bonding terminal box of the building by BV- 1X25mm2. The automatic fire alarm system adopts grounding device, and the grounding resistance is not more than 1 ohm. BV- 1X4mm2 is used as the special grounding wire from the equipotential terminal box to all fire electronic equipment.
The equipment in the fire control room is powered by dual power supplies, with automatic switching device at the end, and UPS is used as standby power supply, which is provided by the equipment manufacturer.
Automatic fire alarm system This project adopts centralized alarm control system and is designed according to two buses.
In this project, temperature detectors are used in the boiling water room and disinfection room, and cables with set temperature are used in the ceiling of the first floor underground cable rack, power distribution equipment, fire control room, integrated wiring machine room and under the raised floor. In addition, smoke detectors have been set up in other places. The plane layout of the detector shall fully comply with the provisions of Article 8. 1. 1. 14 of GB 50 165438-98.
There are three manual alarm buttons on each floor of this project, which are located in the elevator lobby in the middle of the building, the lobby aisle side of the left evacuation stairwell and the lobby aisle side of the right evacuation stairwell, meeting the requirements of Article 8.3. 1 16-98. Manual alarm button with telephone jack.
In this project, a fire hydrant glass breaking button is set in each fire hydrant box, and the fire pump is started through the linkage of fire alarm controller, which meets the requirements of 7.4.6.7 in GB50045-95. The location of fire hydrant box is funded by the equipment specialty.
In this project, an acousto-optic alarm device is set at 0.2m above the stair door of each floor. In case of fire, it can indicate the location of the burning floor and guide firefighters to find the burning floor, which is convenient for fire extinguishing.
NH-BV-2X 1.5 Pipe piercing SC20 is used for all automatic fire alarm lines hidden on the roof.
After the fire alarm of the fire linkage control system, the fire control room controls the positive pressure air supply valve and electric fire damper of the relevant floor according to the fire situation, and starts the corresponding positive pressure blower and smoke exhaust fan. Smoke exhaust valve 2800C is closed, fire damper 700C is closed, and the action signal is fed back to the fire control room.
In the fire control room, the fire hydrant pump, spray pump, positive pressure fan and smoke exhaust fan can be automatically controlled by the linkage control module or manually controlled by the direct control line in the linkage console, and receive their feedback signals.
In this project, the linkage control line is embedded with the pipe SC20, and the direct control line is laid to the corresponding equipment electric control box through the pipe SC40 with ZR-KVV-7X 1.5.
Control of fire hydrant pump
The indoor fire hydrant system of this project is a temporary high-pressure water supply system. Usually, the booster pump is automatically controlled by the pressure switch to maintain the pressure of the pipe network. When the pipe network pressure is too low, directly start the main pump.
After the fire hydrant button is started, the fire hydrant pump is directly started, and the fire control room can display the alarm position and receive feedback signals.
The linkage console of the fire control room can manually control the fire hydrant pump through the direct control line and receive feedback signals.
In the fire control room, the power supply status, working status and fault status of the fire hydrant pump can also be displayed.
The above control and display functions meet the requirements of articles 5.3.2, 6.3. 1 6-98.
Control of spray pump
The automatic sprinkler system of this project is a temporary high-pressure water supply system. Usually, the booster pump is automatically controlled by the roof water tank and pressure switch to maintain the pressure of the pipe network. When the pipe network pressure is too low, directly start the main pump.
In case of fire, when the sprinkler sprays water, the water flow indicator will act and give an alarm to the fire control room. At the same time, the wet alarm valve moves, the hydraulic alarm bell rings and the pressure switch gives an alarm. The signal is transmitted to the fire control room to start the spray pump, and the fire control room receives the feedback signal.
The linkage console of the fire control room can manually control the spray pump through the direct control line and receive the feedback signal.
In the fire control room, the power supply status, working status and fault status of the spray pump, as well as the working status of the water flow indicator, wet alarm valve and safety signal valve can also be displayed.
The above control and display functions meet the requirements of articles 5.3.2, 6.3. 1 6-98.
Control of smoke control facilities
When a fire breaks out, the fire control console will open the plate smoke outlet of the corresponding floor and start the roof smoke exhaust fan. When the temperature reaches 2800C, the fuse of the smoke exhaust valve is blown, and the interlock of the smoke exhaust fan stops.
The linkage console of the fire control room can manually control the smoke exhaust fan through the direct control line and receive the feedback signal.
The fire control room automatically or manually controls the start and stop of the positive pressure fan to jointly open the positive pressure air supply outlet of the fire floor and its adjacent floors.
After the fire damper on the air duct connected with the air conditioner and the fan is closed, the air conditioner and the fan will stop interlocking and give an alarm.
The underground substation of this project is equipped with linkage control module box, and some non-fire low-voltage outlet circuit breakers such as air conditioning units are equipped with shunt tripping devices, and the fire control room will disconnect the relevant power supply after confirming the fire.
The above control and display functions meet the requirements of Articles 5.3.2 and 6.3.9 of GB 5016-98.
Fire emergency broadcasting system This project adopts a set of audio equipment for fire emergency broadcasting and background music. The system adopts a constant voltage output mode of 100V, and is equipped with a standby amplifier, and its capacity is 1.5 times that of the simultaneous fire emergency broadcast.
In case of fire, automatically or manually open the relevant floors or make emergency broadcast, and cut off the background music broadcast at the same time. The control procedure of fire emergency broadcast is: when a fire occurs on the first floor, start the first floor, the second floor and the underground floors or emergency broadcast; When there is a fire on the local basement, start the fire emergency broadcast on the first floor and the basement; When there is a fire above the second floor, start the fire emergency broadcast of this floor and the adjacent upper and lower floors.
The installation power of speakers in public places is 3W, except for the basement and the wall-mounted stairs 2.5m above the ground, the rest are embedded in the ceiling. When arranging, ensure that the distance from any part of the fire zone to the nearest speaker is not more than 25m.
Fire communication system The fire control room of this project is equipped with an external telephone for direct alarm and a special telephone switchboard for fire control.
According to the requirements of Article 5.6.3 of GB50 1 16-98, in addition to the telephone jack at the manual alarm, the underground substation, the first floor fire control room, the outdoor fire water pump room, the roof fire elevator room, the smoke control room and the air-conditioned room are provided with special extensions for fire telephones.
Elevator monitoring system The monitoring panels of all elevators are located on the console of the fire control room. According to the fire situation, the elevator monitoring panel gives instructions to direct the elevator to run according to the fire control procedure. You can talk to any or all elevators and explain the reasons for changing the operating procedures. All elevators except the fire elevator were forced to return to the first floor. The elevator display panel shows the running status of each elevator, such as floor number, normal, fault, door opening and closing, etc.
According to article 6.3.3. 10 of GB50045-95, a glass-breaking button and a key switch should be set at the door of the first-floor fire ladder for firefighters to use when extinguishing the fire, and the key switch has priority control.
In case of fire in the non-fire power cut-off control system, the fire control room will automatically cut off the normal lighting and power supply in the fire area through the control module in the power distribution room according to the fire situation.
Second, the antenna TV system is * * *
In order to reduce the loss, the TV front-end box is located in the weak current well on the sixth floor, and AC220V power socket is set nearby. Each floor is equipped with a distribution box. The system adopts distribution branch mode, and the user level is not less than 65dB. Except the terminal box in the ward is 2.0m away from the ground, all other terminals are installed at 0.3m away from the ground.
Third, the ward call system
There are wards on the second to eighth floors of this project, and the ward call system should be set according to Article 5.4. 1 1 of JGJ49-88. The host computer on each floor is located in the nurse station and is wall-mounted. The corridor display hanging screen is hung in the center of the corridor, and the AC220V power socket is set near the main machine and the corridor hanging screen. The corridor hanging screen adopts double-sided display type. As the system selection is determined by Party A, when the basic model is selected, the distance between the bedside unit and the ground is1.1m; When the intercom type is selected, the distance between the bedside device and the ground should be1.4m. Call buttons should be set in the bathroom so that patients can call for help in an emergency.
During construction, the junction box should be embedded in the wall hanging of the main machine, the ceiling near the display screen, the door machine, the bedside unit and the call button of the bathroom.
Fourth, the integrated wiring system
This project is equipped with an integrated wiring system to support multimedia services such as voice, data, graphics and images.
In this project, a comprehensive wiring machine room is set on the first floor, and equipotential connection terminal boxes and special grounding trunk lines are set in the machine room. BV- 1X25mm2 is led to the general equipotential connection terminal box of the building through PVC pipes. The integrated wiring system adopts * * * grounding device, and the grounding resistance is not greater than 1 ohm.
This system adopts unshielded super five-level integrated wiring system. The vertical trunk line of computer adopts optical fiber, and the vertical trunk line of telephone adopts three kinds of large logarithm cables. Each floor of the weak current well is equipped with 19 "standard cabinet, and the optical fiber link unit LIU, HUB hub and floor wiring equipment DF are all assembled in the cabinet.
According to the actual needs of this project, information sockets are set in offices, clinics, duty rooms, nurse stations, conference rooms, toll booths and pharmacies. RJ45 dual-port information socket is selected as the information socket, and the distribution cable of each information socket is 4 pairs of twisted pair and 2 pairs of twisted pair, which correspond to voice and data respectively.
Weak current wells are laid with 400x200 special trunking. After installation, each floor is blocked with fireproof materials. Weak current wells are usually laid with 40x5 flat copper tape as the special grounding wire of weak current system, and each floor of weak current wells is equipped with LEB local equipotential connection junction box. The weak current trunking is laid in the ceiling of each aisle, and the weak current lines are separated by partitions.
From the second floor to the eighth floor of the nurse station, there are separate telephone junction boxes, and the nurse station manages the telephone of this ward in a unified way.
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