[Henan] Fire protection of high-rise ward building of a hospital engineering construction group
The project is a frame shear wall structure with two floors underground and twenty-two floors above the ground. The main functions of the project are comprehensive wards and operating rooms. The second floor of the basement is a parking lot, the first floor underground is a restaurant, and the twenty second floor above the ground is a comprehensive ward. The bidding scope of this fire protection system project includes: ① automatic sprinkler system; ② Automatic fire alarm and linkage control system; ③ Fire emergency broadcasting system; ④ Direct fire intercom telephone system. Design overview of the project: the pipes of the fire hydrant system and the automatic sprinkler system are hot-dip galvanized steel pipes, and the pipe connection principle is: the pipe diameter is ≥ 65 mm, and the clamp connection is used; If the pipe diameter is less than 65mm, thread connection shall be adopted. Design overview of automatic fire alarm and fire linkage control system: (1) System overview: GST-9000 automatic fire alarm system is adopted for automatic fire alarm and fire linkage control system, which consists of intelligent smoke detector, temperature detector, manual alarm button, monitoring module, programmable control relay CRT computer display system, automatic fire alarm device with software control function and linkage control device. (2) . Fire Center:. Overall protection is adopted The system adopts the form of fire center alarm. The control room is equipped with a set of alarm controller, an emergency broadcast power amplifier and control system, a set of bus fire telephone host, a set of bus fire linkage control device (bus linkage control panel), and a set of multi wire fire linkage control device (multi wire linkage control panel); A computer workbench is set to display the range of alarm area and architectural graphics, and the microcomputer is equipped with special fire alarm system display, alarm, recording and printing software; It is equipped with a set of AC power transformer, voltage regulator, charger and backup power supply. The above equipment are collectively assembled and installed in the combined operating piano stand The fire center is additionally equipped with 1 external fire telephone One set of power amplifier is used for emergency broadcast system, and broadcast control panel is set. The fire broadcast shall be switched by connecting the fire floor and the adjacent upper and lower floors. Set the playback device to automatically play the pre recorded fire evacuation broadcast during fire fighting, and set the microphone and recording equipment One bus fire telephone switchboard is set to be responsible for internal fire communication; The main equipment room is equipped with a wall mounted fire telephone extension, and other parts are equipped with fire telephone plugs (integrated with fire alarm buttons). (3) On site equipment alarm and linkage: fire detector: differential and constant temperature address code temperature detector is set in the basement, address code photoelectric smoke detector is set in other parts, and combination of temperature and smoke detectors is set at the fire shutter door and high and low voltage power transformation and distribution room Manual alarm button: address code manual alarm button shall be set at the evacuation exit, and the walking distance to the nearest manual alarm button at any position in the fire compartment shall not exceed 25 meters Fire pump and fire hydrant: each fire hydrant is equipped with an address button. Once pressed, a signal will be sent to the alarm controller, and the control module on the bus will immediately start the fire pump; After each direct start control contact (normally open) is connected, it is directly led to the fire pump electric control cabinet to directly start the fire pump, and the pump start signal is returned to the signal lamp in each fire hydrant box. The signal lamp in the fire hydrant box uses DC24V safety voltage; The bus start and stop control, operation and stop monitoring, and fault monitoring of the water pump are realized by the field module Wet alarm valve and water flow indicator of spray pump: once the pressure switch on the wet alarm valve acts, the monitoring module sends a signal to the alarm controller, and immediately starts the spray pump. The signal valve reflects the closing condition of the spray pipe network to the alarm controller through the monitoring module, The action signal of the water flow indicator at the front end of the spray pipe network in each zone sends an alarm to the automatic fire alarm controller through the monitoring module. The bus linkage control and multi wire linkage control of the spray pump are realized on the bus linkage panel and the multi wire linkage panel respectively Smoke exhaust fan, fire make-up fan and smoke and fire damper in the basement: once the detector alarm is confirmed, the control module will link the smoke exhaust fan and fire make-up fan in the corresponding fire compartment to start or switch to the fire operation state. The monitoring module monitors the outlet of smoke exhaust fan and smoke and fire damper. When the smoke exhaust fan of the fire compartment is shut down due to fire; In case of fire, the non fire smoke exhaust fan in the corresponding fire compartment shall be interlocked to shut down, and the corresponding general air supply and air supply valve shall be interlocked to close. The bus linkage control and multi wire linkage control of the fire smoke exhaust fan shall be realized on the bus linkage panel and the multi wire linkage panel respectively Fire shutter door control: after the smoke detectors on both sides of the fire shutter door in the evacuation exit detect a fire, the shutter door automatically falls to 1.8m. After the heat detector detects a fire, the fire shutter door automatically returns to the bottom. The fire alarm controller shall also realize bus linkage control through keyboard programming. Manual control buttons are set on both sides of the fire rolling shutter door, and the fire rolling shutter door used for fire separation falls to the bottom manually when the fire is confirmed Positive pressure air supply fan and air supply outlet of air shaft: air supply outlet is set in the air shaft of the front room. Once the alarm of the detector is confirmed, the control module drives to open the air supply outlet of the fire floor and adjacent upper and lower front rooms. The positive pressure air supply fan located on the top floor is interlocked to start. The positive pressure air supply outlet of the staircase is self blowing. Once the alarm is confirmed, the positive pressure air supply fan located on the top floor is interlocked to start Air shaft smoke exhaust outlet and plate type smoke exhaust outlet: smoke exhaust outlet or plate type smoke exhaust outlet shall be set in the smoke exhaust shaft of each floor corridor. In case of fire in this floor, open the smoke exhaust outlet of this floor and start the smoke exhaust fan of the roof corridor, and the fire and smoke damper will send an alarm signal. The fire and smoke prevention valve at the outlet of the roof fan acts to linkage the fan shutdown Elevator control: once the fire control is confirmed, the control module signals the elevator control cabinet, the elevator goes down to the first floor to open the door and release people, the ordinary elevator cuts off the power, and the fire elevator is controlled by the fireman with a key Power failure and leakage alarm of non fire power supply: once the fire is confirmed, the control module will drive the breaker shunt release through the conversion module to cut off the non fire power supply. After the leakage monitoring device used to prevent electrical leakage acts, send a signal to the fire center Emergency broadcast: once the fire control is confirmed, the fire control center broadcast control panel will automatically switch on the fire broadcast of the corresponding floor or fire compartment according to the fire control switching requirements Audible and visual alarm device: address door lights are installed at one side of each stairway entrance of the podium building to indicate the fire floor for the firefighters; Audible and visual alarms are installed on one side of the elevator hall at each staircase of the main building as fire alarm signals Set leakage alarm to prevent electrical fire, and the leakage signal is sent to the fire center. (4) . Linkage automatic (manual) control: The alarm controller can realize automatic control of the controlled equipment according to the linkage procedure and handling plan Through the programmed grid keyboard operation, the automatic/manual control function can be realized on the bus system linkage panel or the computer workbench, and the status can be monitored The manual controller group, namely button and signal light group, is set on the multi wire linkage panel, which corresponds to the direct monitoring equipment one by one and has other electric control cabinets leading the monitoring cable directly. In case of emergency, it can directly start the fire pump, spray pump, fire fan and other very important fire fighting equipment, and can reflect the operating status of the equipment. (5) . System wiring and piping: all fire alarm and system control pipelines concealed in the floor shall be properly marked along the pipeline when laying pipelines to avoid being punctured when installing hangers. All pipelines (galvanized steel pipes) concealed in the basement floor shall be located below the open drain at the corresponding location. Pipelines shall be laid in accordance with relevant regulations and junction boxes shall be installed at appropriate locations. The line passes through the metal pipe in the incombustible body, and the thickness of the protective layer is not less than 30mm. (6) The local adjustment of the location of detection and alarm equipment caused by the decoration of buildings and suspended ceilings should be controlled within the allowable range of the specification, especially the final installation position of the detector must meet the requirements of 24.5.2 of JGJ/T16-92 Code for Electrical Design of Civil Buildings, and be set in the area without suspended ceilings (such as stairwells, fire forerooms, equipment rooms, etc.) The detector of shall be kept away from lamp panel, air duct and other places where it is not easy to lead out. (7) Grounding: special grounding wire (two BVR-500V-25 mm2 wires) is introduced from the reserved plate of the combined grounding electrode as the protective grounding of the equipment. The connector should be grounded with a grounding terminal and tin coated. The grounding of the automatic fire alarm system can be suspended, but it should meet the classification requirements of Classification of Electrical and Electronic Equipment According to Protection against Electric Shock GB/T12501-90.
