【 Weak current College 】 fire system common problems, causes and treatment---Power By 【 China power house network 】

First, the automatic fire alarm system
1. system composition
(1) controlled measuring device: smoke detector and heat detector, flame detector.
(2) Manual alarm: alarm button.
(3) alarm sounding system: regional alarm, pool alarm, alarm control center.
2. the main features of the system completed
When the fire broke out, the probe will fire alarm signal is transmitted to the controller through sound and light signals, and on the control panel shows the fire site, so as to achieve the purpose of predicting fire. At the same time, or you can manually alarm button to complete the Manual alarm functionality.
3. system easy problems, causes, simple processing method
(1) detector false alarms, fault alarm detectors. Cause: the detector sensitivity select unreasonable, humidity, wind velocity, dust is too large, mechanical shock, probes use a long decline, device parameter. Treatment methods: the installation environment, select the appropriate to the sensitivity of the detector, the installation should avoid air and wind speed larger channel, regular inspection, cleaning and replacement according to the situation.
(2) manual button false alarms, fault alarm manually button. Cause: the button uses the long parameter, or button man-made damage. Treatment method: check regularly, the timely replacement of damaged so as not to affect the system operation.
(3) alarm controller failure. Cause: mechanical damage reported failure in itself devices or external detector, manual button problem caused alarm controller reported failures, reported to the fire. Treatment methods: using a table-or-self diagnostics to determine inspection machine itself, troubleshooting, or press (1) (2) processing methods, check whether caused by the outside world.
(4) line failure. Cause: the insulating layer is damaged, loose joints, environmental humidity, resulting in decreased insulation. Treatment method: check the insulation used in the table, check the connectors, wiring at the colour used in welding, plastic etc. Second, fire hydrant system
1. system composition
Fire pumps, regulators pumps (or regulators cans), fire hydrant, fire hydrant valve, interface, water gun, hose, fire hydrant and alarm buttons, fire hydrant system control cabinet.
2. the main features of the system completed
Fire hydrant system pressure pipeline is full of water, such as system with micro leaks, you can rely on regulators pumps or regulators cans to keep the system of water and pressure. When fire, first open the fire box, as required to meet a good interface, hose, the water gun at the fire hydrant valve, open, water gun with water immediately, press the fire hydrant button, start by fire hydrant fire pump to the pipeline.
3. system easy problems, causes, simple processing method
(1) open fire hydrant valve without water. Cause: you may have in the pipeline, the pipeline leakage point without water and pressure gauge, regulator system does not work. Treatment method: check for leaks, gauges, repair or install the regulator device, ensuring water hydrant.
(2) press the manual button, you cannot start the linkage of the fire pump. Reason: connection loose manually button, the button itself is damaged, linkage control cabinet itself down, fire pump start Cabinet failure or loose connection, fire pump itself failed. Treatment method: check the device connection, the device itself, check the pump itself there are electrical, body parts and no failure. Third, sprinkler system
1. system composition
Closed sprinkler, water meter, wet alarm valve, pressure switch, regulators pumps, spray pump, spray control cabinet.
2. the main features of the system completed
The system is in normal operation, the pipeline has a certain pressure of water, fire, the fire temperature reaches the temperature of the closed-head, broken glass, nozzle spray foam, pipe water from static to dynamic, the water flow indicator, signal transmission to the fire Centre of fire control cabinet alarm, alarm when wet alarm device, pressure switch action, through the Control Panel start spraying pump for water supply pipe, complete system of fire-fighting capabilities.
3. system easy problems, causes, simple processing method
(1) voltage appliance starts heavily. Cause: the main front-end for wet equipment leaks, plumbing fittings or connections spill, leak, closed type nozzle tip relief device not for good. Treatment methods: check all plumbing, sprinkler and end-relief device, identify leaks point for processing.
(2) flow indicator in water movements and not the signal. Cause: in addition to electrical lines and terminals pressure lines, mainly flow means
Shown in device itself, including pulp tablets fixed, pulp tablets damaged, broken or fretting switch Reed pipe-contact burned, or don't work a permanent magnet. Treatment method: check the pulp slice for damage or death, check the permanent magnet, Reed pipe, and other devices.
(3) after the end of the nozzle movement or relief device open after the linkage pump without water pipeline front-end. Cause: mainly for the wet alarm valve not action, wet alarm device can not be sent to the frontend pipes for water. Treatment method: check the wet alarm equipment, mainly butterfly valve, until the flexible flip, and then check the other parts of the wet plant.
(4) joint action signals, do not spray pump. Cause: possible to control devices and fire pump start Cabinet wiring of loose or device failure or mechanical failure of the spray pump itself. Treatment methods: check the wiring and the pump itself. 4. smoke control system
1. system composition
Exhaust valve, manual control, smoke machine, smoke control cabinet.
2. the main features of the system completed
Fire, smoke control cabinet received fire signal, issued instructions to open the smoke machine, fire district begins to smoke, or artificially by manual control unit for manual operation, complete exhaust system features.
3. system easy problems, causes, and simple treatments
(1) of the exhaust valve does not open. Cause: the failure of the exhaust valve control machinery, electro-magnet is not caused by the actions or machinery rust smoke exhaust valve does not open.
Treatment methods: always check the operating organization, whether or not, is there a jammed due to corrosion, check the electromagnet is working properly.
(2) exhaust gasValve manually open it. Cause: the manual control unit card dead or reinforcement wire is loose. Treatment method: check the manual.
(3) smoke machine does not start. Cause: the smoke machine control system device failure or loose, mechanical fault line. Treatment method: check the mechanical system and control part of the device system wiring, etc. 5. fire shutter system
1. system composition
Smoke detectors, heat detectors, control buttons, motor, limit switch, shutter control cabinet.
2. the main features of the system completed
When the fire fire partitions partition function, when the fire alarm, smoke detectors, fire signals sent to shutter control cabinets, control cabinet issued a start signal, shutter automatically drops to distance to location of 1.8m (special regions of shutter can also be a step towards the end), if the heat detector and alarm, the shutter will drop to the end.
3 system easy problems, causes, and simple treatments
(1) fire shutter cannot rise. Cause: possible to power failures, electrical failures or door itself stuck. Treatment methods: check the main power, control, power supply and motor, check the door itself.
(2) fire shutter have risen without degradation or decrease without increasing. Cause: the decline or increase button problem, contactors and thread
Circle, limit switch, contactor interlocking normally closed contact. Treatment methods: checking down or up button to decrease or increase contactors switch and coils, check limit switch, check decline or increase of contactor interlocking normally closed contact.
(3) in the control center cannot be linked fire shutter. Cause: control center control device itself down, control module failure, linkage transmission line fault. Treatment methods: inspection control center control device itself, check control module, check the transmission lines. 6. fire incident radio and intercom system
1. system composition
Amplifiers, speakers, switch module, fire radio control cabinet
2. the main features of the system completed
When the fire is on duty personnel receive fire to the fire over the phone and call understanding fire partitions for the processing of the fire was
Therefore, you can broadcast the prompt notice concerned personnel will take appropriate measures to be dispersed.
3, prone to problems and their causes, and simple treatments
(1) radio silence. Cause: typically amplifiers no output. Treatment method: check the amplifier itself.
(2) individual parts of the radio silence. Cause: the speaker damage or loose connections. Treatment method: check the speakers and wiring.
(3) cannot be forced to switch to the accident. Cause: typically switch module for the relay is not caused by the action. Treatment methods: check the relay coil and contacts.
(4) cannot implement tiered broadcasting. Cause: tiered broadcasting switch device failure. Treatment methods: checking switch installations and wiring.
(5) intercom phone doesn't call. Cause: the failure on the phone itself, intercom phone jack connector is loose or damaged. Treatment methods: checking talkback and Jack itself, check line.