overview of automatic fire-alarm systems

Automatic fire alarm system is the main part of fire control system.

Automatic fire alarm system includes fire early warning system, fire detection alarm and linkage control system.

The linkage control system includes fire hydrant button, fire alarm, various input and output modules, fire appliance control device, fire broadcasting system, fire telephone system, graphic display device, emergency lighting, evacuation indicating system, etc.

Fire early warning system is an independent subsystem of automatic fire alarm system. It mainly includes combustible gas detection and alarm system and electrical fire monitoring system.

Combustible gas detection and alarm system is mainly used in the use, production of combustible gas or combustible steam places.

1. Automaticfirealarmsystemisthemainpartoffirecontrolsystem.
Automaticfirealarmsystemincludesfireearlywarningsystem,firedetectionalarmandlinkage
controlsystem.
Thelinkagecontrolsystemincludesfirehydrantbutton,firealarm,variousinputandoutput
modules,fireappliancecontroldevice,firebroadcastingsystem,firetelephonesystem,graphic
displaydevice,emergencylighting,evacuationindicatingsystem,etc.
Fireearlywarningsystemisanindependentsubsystemofautomaticfirealarmsystem.Itmainly
includescombustiblegasdetectionandalarmsystemandelectricalfiremonitoringsystem.
Combustiblegasdetectionandalarmsystemismainlyusedintheuse,productionofcombustible
gasorcombustiblesteamplaces.
Whentheconcentrationofcombustiblegasintheprotectedareareachesthesetvalue,the
alarmisset.
Thepurposeofelectricalfiremonitoringsystemistoeliminatethefirehazardofelectrical
equipment.
Whentheresidualcurrentvalueofthedetectedpowerlineorthetemperatureriseofthe
detectedelectricalcomponentsexceedsthesafetyvalue,analarmwilloccurtopreventleakage,
shortcircuit,overloadandothersituations.
Thepurposeofafirewarningsystemistoeliminatefirehazards.
Whenafireoccurs,thefiredetectionandalarmsystemandfirealarmlinkagecontrolsystemare
requiredtooperate.
Firedetectionalarmandlinkagecontrolsystemisautomaticfirefightingfacilities,itcarriesout
firedetectionalarm,sendsoutcontrolsignalstoallkindsoffirefightingequipmentandreceives
feedbacksignalsfromtheequipment,soastoachievepredeterminedfirefightingfunction.

2. Thefiredetectionalarmandlinkagecontrolsystemasshowninthefigureiscomposedoffire
detectionalarmsystemandfirelinkagecontrolsystem.
Inpracticalapplication,firealarmcontrollerandfirelinkagecontrollerareintegratedproducts,
whicharecalledconnectedfirealarmcontroller.
Firealarmlinkagecontrolsystemmainlyincludesfiredetector,manualfirealarmbutton,fire
hydrantbutton,firealarm,variousinputandoutputmodules,fireelectricalcontroldevice,fire
broadcastingsystem,firetelephonesystem,graphicdisplaydevice.
Firedetectorisadevicethatcanrespondtofireparametersandautomaticallygeneratefire
alarmsignal.
Weoftenhavesmokedetectors,temperaturedetectors,photosensitivefiredetectors,carbon
monoxidefiredetectors,picture-typefiredetectorsandsoon.
Manualfirealarmbuttonisadevicethatgeneratesfirealarmsignalmanually.
Thefirehydrantbuttonisamanualalarmbuttonsetwiththefirehydrant.
Theautomaticfirealarmsystemshallbeequippedwithfireaudibleandvisualalarms,andallfire
audibleandvisualalarmsinthebuildingshallbeactivatedafterthefireisconfirmed.
Theinputmoduleisusedtoreceivetheactionstatusofthemonitoreddevice,andcanwirethe
normallyopenornormallyclosedsignalsofthemonitoreddevice,suchaswaterflowindicator
andpressureswitch.
Theoutputmoduleisusedtocontrolthestart,stoporswitchofsomedevices.Itisgenerally
usedtocontroldeviceswithoutsignalfeedback,suchasaudibleandvisualalarmsandalarm
bells.
Inputoutputmodule
Comparedwiththeoutputmodule,theinputandoutputmoduleisequippedwithsignal
feedbackfunction.Afterstartingthedevice,theinputandoutputmodulecanreceivethe
feedbacksignalfromthedevice.Itismainlyusedtocontroltheequipmentwithsignalfeedback,
suchassmokeexhaustvalve,airsupplyvalve,firevalve,etc.
Inthelinkagecontroloffirealarm,automaticsprinklersystem,hydrantsystem,foam
extinguishingsystem,gasextinguishingsystem,smokepreventionandexhaustsystem,firerolling
curtainsystem,fireextinguishingsystemcanberealizedthroughallkindsofdetectors,alarm
buttonsandmodules.

3. Emergencylightingandevacuationindicatingsystem,fireemergencybroadcastingsystemand
otherfirefacilitieslinkagecontrol.Withthemulti-linelinkagecontrolpanel,thelinkagecontrolof
firepump,smokecontrolandsmokeexhaustfanandotherstartingcabinetscanalsoberealized.
Forsomerelativelycomplexcontrollogicofthegasfireextinguishingsystem,firedoor
monitoringsystem,fireshuttersystem,emergencylightingandevacuationindicationsystem,fire
emergencybroadcastsystem,firetelephonesystem,willalsosetupaseparatecontrolhostto
implementaspecificfunction.
Thegasfireextinguishingsystemismainlyusedtoprotectsomespecialimportantpartsand
computerequipment.
Firedoor,firewindow,fireshutterisusedforbuildingdoorsandWindowsattheopeningofthe
fireseparationfacilities.
Fireemergencylightingandevacuationindicatingsystemreferstothesystemthatprovides
lightingandevacuationindicatingforpersonnelevacuationandfirefightingoperations.
Fireemergencybroadcastingsystemisanimportantequipmentforfireevacuationandfire
fightingcommand,whichcaneffectivelyguidetheevacuationofallpartsofthebuilding.
Firetelephoneisaspecialequipmentforfirecommunication,whichcanprovideconvenientand
fastmeansofcommunicationwhenfireoccurs.
Thegraphicdisplaydeviceisinstalledinthefirecontrolcenter,whichcanaccessthealarm
informationandfaultinformationoftheelectricalfiremonitor,firedoormonitor,fireequipment
powermonitor,combustiblegasdetectionalarmcontroller
Simulatethebuildingplanelayoutoffiretriggerdeviceandlinkagedeviceonsite,whichcan
truthfullyreflectthefire,linkageandfaultsituationonsite.
Thepowermonitoringsystemoffirefightingequipmentmonitorsthepowersupplyoffire
fightingequipmentinrealtime,anddetectstheworkingstatusofthepowersupply,suchas
currentandvoltage.

4. Whenthepowersupplyover-voltage,under-voltage,over-current,lackofphasecircuitfault,it
sendsoutanalarmsignal.
Thepowermonitoringsystemoffirefightingequipmentismainlyusedtomonitortheworking
stateofthepowersupplyoffirefightingequipment,andhasnodirectcorrelationwiththe
automaticfirealarmsystem.