Intshayelelo

Kwimililo yomlilo yemizi-mveliso, umlomo awuyonto incinci kodwa yindawo yokulawula ukufikelela, ukuhamba, ubungakanani bethontsi, kunye namandla okuphendula. Ukhetho olufanelekileyo luchaphazela indlela amanzi okanye igwebu elingena ngayo kubushushu, likhusela izixhobo, kwaye lihlala lilawuleka kubasebenzi phantsi kweemeko ezinzima. Eli nqaku lichaza izinto eziphambili eziqhuba ukukhethwa komlomo, kubandakanya uhlobo lomngcipheko, iimfuno zoxinzelelo kunye nokuhamba, ipateni yomsinga, iimfuno zokusetyenziswa komlomo, kunye nemida yokuphatha. Ekugqibeleni, abafundi baya kuba nesakhelo esisebenzayo sokufanisa umlomo womlilo kunye nemingcipheko ethile yemizi-mveliso kunye neemeko zokusebenza, okwenza iinkcukacha zobugcisa kwicandelo elilandelayo zibe lula ukuvavanya nokusebenzisa.

Kutheni Ukukhetha Iimpumlo Zomlilo Kubalulekile Kwiimeko Zemizi-mveliso

Ukucinywa komlilo kwimizi-mveliso kufuna ukuchaneka, ukuthembeka, kunye nokuqonda okucokisekileyo kwendlela esebenza ngayo i-fluid.Ukukhethwa kwesixhobo somlilosisigqibo esisisiseko esichaza ngokuthe ngqo ukusebenza kakuhle kwe-hydraulic, amazinga okusetyenziswa kweearhente, kunye nobuchule bobuchule ngexesha lemisebenzi yokucinezela uxinzelelo oluphezulu.

Impembelelo ekusebenzeni koxinzelelo kunye nokhuseleko lwabaqhubi

Umsebenzi oyintloko wombhobho kukuyila isisombululo samanzi okanye sefoam sibe ngumjelo oluncedo kakhulu, kodwa uyilo lwaso luchaphazela kakhulu ukusebenza kakuhle kokucima kunye nokhuseleko lomsebenzisi. Ubungakanani bamathontsi kunye nokufikelela komlambo kumisela indlela iarhente yokucima engene ngayo kwiikholamu zobushushu. Umzekelo, amathontsi amancinci andisa indawo yomphezulu yokufunxa ubushushu kodwa awanawo ubunzima bokungena kwii-updrafti zobushushu ezinesantya esiphezulu.

Ngokwahlukileyo koko, ukhuseleko lomsebenzisi lulawulwa kakhulu ngamandla okuphendula nge-nozzle. Amandla okuphendula kumjelo oqinileyo abalwa kusetyenziswa ifomyula i-NR = 1.57 × d² × p, apho incam ye-1.25-intshi esebenza kwi-50 PSI ivelisa malunga neekhilogram ezili-122 zamandla okuphendula. Ukudlula imilinganiselo ye-ergonomic—ngokuqhelekileyo iikhilogram ezingama-60 ukuya kuma-75 kumntu omnye—kunokukhokelela ekudinweni ngokukhawuleza, ukulahlekelwa kulawulo lomjelo, kunye nokwenzakala okukhulu emsebenzini.

Imeko zoMlilo weMizi-mveliso ezichaphazela ukhetho lweMibhobho

Iindawo zoshishino zineenkcukacha ezintsonkothileyo zeengozi ezidlula kakhulu iimeko zomlilo eziqhelekileyo zikamasipala. Izakhiwo ezifana neendawo zokucoca iikhemikhali, iindawo zokugcina izinto ezininzi, kunye neendawo zokucubungula iikhemikhali zihlala zineemeko zomlilo ezinamazinga aphezulu okukhululwa kobushushu (HRR). Umlilo ochithekileyo wolwelo kwimizi-mveliso unokuvelisa ngokulula i-HRR engaphezulu kwe-100 megawatts, nto leyo ebangela ukuba kubekho amandla okupholisa amaninzi kunye namazinga aphezulu okuhamba kwamanzi.

Kwiyunithi yokucubungula iikhemikhali, ubukho bemigca yegesi ecinezelweyo bunokufuna ipateni ebanzi yokukhusela inkungu ukukhusela iqela eliphambili ngelixa behlukanisa umthombo wepetroli. Ukukhetha umlomo ochanekileyo kufuna ukumakisha ezi ndawo zokusebenza ezithile kubuchule bokuhambisa izixhobo, ukuqinisekisa ukuba izixhobo zinokumelana nemithwalo yobushushu elindelekileyo kunye neengozi ezithile zeekhemikhali ezikhoyo kwindawo.

Iintlobo zeeNozzle zoMlilo kunye neeNkcukacha zeNtsebenzo ephambili

Ukwahlulahlula ii-nozzles ngokweendlela zazo zokusebenza kubalulekile ekuhambelaniseni izixhobo kunye neziseko ze-hydraulic ezikhoyo zesakhiwo. Ubunjineli bangaphakathi be-nozzle bulawula indlela amanzi abunjwa ngayo, akhawuleziswe ngayo, kwaye athunyelwa ngayo kwindawo enobungozi.

I-Smooth Bore, Inkungu, i-Gallonage ekhethiweyo, kunye neeNozzles ezizenzekelayo

Ii-fire brigades zemizi-mveliso zihlala zikhetha phakathi kwe-smooth bore kunye neendlela ezahlukeneyo zokwakheka kwe-fog nozzles. Ii-smooth bore nozzles zinika ikholamu eqinileyo yamanzi xa uxinzelelo oluphantsi lokusebenza—rhoqo i-50 PSI—ibonelela ngokufikelela okuphezulu, ukungena nzulu, kunye nokungena komoya okuncinci, okubalulekileyo ekuthinteleni ukuphazamiseka kweeleya zobushushu.

Ii-nozzles zenkungu, ezinokuvelisa iipateni ezisusela kwimilambo ethe tye ukuya kwiikhowuni ezibanzi ezikhuselayo, zahlulwe zibe zii-gallons ezisisigxina, ii-gallons ezikhethiweyo, kunye nee-variants ezizenzekelayo. Ii-nozzles ze-gallons ezikhethiweyo zivumela abaqhubi ukuba balungise isantya sokuhamba (umz., 95, 125, 150, okanye 200 GPM) ngelixa begcina uxinzelelo lokukhupha ipompo oluqhubekayo. Ii-nozzles ezizenzekelayo zisebenzisa indlela yangaphakathi yentwasahlobo ukugcina uxinzelelo lwe-nozzle oluhlala luhleli—ngesiqhelo i-75 okanye i-100 PSI—kuluhlu lokuhamba oluguquguqukayo, okuphucula ukufikelela komlambo nokuba uxinzelelo lwepompo luyatshintsha ngexesha leziganeko ezinzima zoshishino.

Iinkcukacha ezibalulekileyo: Izinga lokuhamba, uxinzelelo, ukufikelela, kunye nephethini

Ukuvavanya iinkcukacha ezibalulekileyo kuqinisekisa ukuba umlomo uza kusebenza ngokufanelekileyo phantsi kweemeko ze-hydraulic ezikwindawo ethile. Izinga lokuhamba kwamanzi (elilinganiswa ngeelitha ngomzuzu okanye iilitha ngomzuzu) kunye noxinzelelo lokusebenza zezona zilinganiselo ziphambili. Ukungalingani phakathi koxinzelelo loyilo lomlomo kunye noxinzelelo lokuhambisa inkqubo kuya kubangela amandla okuphendula angenakulawuleka okanye umlambo obuthathaka, ongasebenzi kakuhle.

Indlela yokufanisa i-Flozzle yoMlilo neengozi zemizi-mveliso kunye

Ukusasazwa ngempumelelo kuxhomekeke ekufaniseni ngokungenamthungo iimpawu zokukhupha umlomo neengozi ezithile zeekhemikhali kunye nenkqubo ye-hydraulic ebanzi yesakhiwo semizi-mveliso. Umlomo luyinxalenye enye kuphela yenkqubo ebanzi yokuthintela.

IiNozzles eziHlanganisa uLwelo oluTshayo, uLwezombane, kunye neJikelele

iingozi kwakhona

Ulwahlulo olwahlukeneyo lomlilo lufuna iindlela ezahlukeneyo zokusetyenziswa kunye nokuhambelana kweearhente. Kwiingozi zolwelo oluvuthayo lweKlasi B, umlomo womlilo kufuneka unikeze izisombululo zefoam ngokufanelekileyo. Nangona imilomo yefog eqhelekileyo inokusebenzisa ifoam engaphefumliyo enemilinganiselo yokwandisa ejikeleze i-3:1 ukuya kwi-5:1, izincamathiselo ezikhethekileyo zokuphefumla zihlala zifuneka ukuze kufunyanwe imilinganiselo efikelela kwi-20:1 kwingubo etyebileyo neqinileyo yokuthintela umphunga.

Xa kujongwana nemililo yombane yeClass C kwiindawo zokuvelisa umbane, imilambo eqinileyo ibeka umngcipheko omkhulu wokutsalwa ngumbane. Endaweni yoko, kufuneka kubekho iphethini yenkungu eyenziwe kakuhle. Izikhokelo zoshishino ngokubanzi zifuna ukuba kubekho umgama omncinci weenyawo ezili-10 ukusuka kwizixhobo eziphila ngamandla aphezulu ngelixa kusetyenziswa iphethini yenkungu ubuncinane be-100 PSI ukuqinisekisa ukuba amathontsi amanzi ahlala eqhagamshelwe, ngaloo ndlela kuthintelwe ukuhanjiswa kombane kumqhubi.

Izinto zeNkqubo: Uqwalaselo lweHose, Umthamo wePump, kunye neFoam Prop

ukulungelelanisa

I-nozzle kufuneka ihambelane ne-hydraulically nee-hose configurations ze-facility, amandla e-pump, kunye neenkqubo zokulinganisa i-foam. Ukulahleka kwe-friction ngaphakathi kwe-hose lay yinto ebalulekileyo; umzekelo, ukuhamba kwe-150 GPM kwi-hose ye-1.75-intshi kuvelisa malunga ne-30 ukuya kwi-35 PSI yokulahleka kwe-friction nge-100 feet.

Ukuba indawo isebenzisa imibhobho emide (umz., iinyawo ezingama-300 nangaphezulu), i-nozzle ye-50 PSI enoxinzelelo oluphantsi ingafuneka ukuqinisekisa ukuhamba kakuhle ngaphandle kokudlula imida ephezulu yoxinzelelo lokukhupha kwipompo yomlilo kwindawo. Ngaphezu koko, xa usebenzisa ii-inline foam eductors, i-nozzle flow rating kufuneka ihambelane ngokuchanekileyo ne-rating yotitshala (umz., i-125 GPM eductor edibene ngokuqinileyo ne-125 GPM nozzle) ukuthintela uxinzelelo lwangasemva ekuphazamiseni isiphumo seVenturi, ebesiya kubangela umxube we-foam obuthathaka nongasebenzi kakuhle.

Ukuqwalaselwa kweendleko zokuthobela imithetho, ukuqina kwayo, kunye nomjikelo wobomi

Ukuthengwa kweizixhobo zokulwa umlilo kwimizi-mvelisoidlulela ngaphaya kokusebenza kwe-hydraulic ukuya kwiindawo zokuthobela imithetho, ukuqina kokusingqongileyo, kunye nolawulo lweeasethi zexesha elide. Iindawo zoshishino zibeka izixhobo kwimichiza edlakadlaka, imozulu embi kakhulu, kunye nokusetyenziswa gwenxa kakhulu koomatshini.

Imigangatho, Uvavanyo, kunye neeMfuno zokuVunywa kweSayithi

Ii-nozzles zomlilo zamashishini kufuneka zilandele imigangatho eqinileyo yokuvelisa kunye nokusebenza ukuqinisekisa ukuthembeka ngexesha leziganeko ezimbi. EMntla Melika, i-NFPA 1964 (iStandard for Spray Nozzles) iyalela iziseko zokusebenza ezingqongqo. Ukuze kufezekiswe ukuthotyelwa, i-nozzle kufuneka imelane novavanyo loxinzelelo lwe-hydrostatic lwe-900 PSI ngaphandle kokusilela kwesakhiwo kwaye inyamezele uvavanyo lokuwa kweenyawo ezi-6 kumphezulu wekhonkrithi ngaphandle kokuphazamisa iindlela zayo zokusebenza.

Ukongeza, izakhiwo ezininzi zoshishino, ingakumbi ezo zi-inshorensiwe yi-iifemu zolawulo lomngcipheko kwihlabathi liphela, zifuna izixhobo zokuthwala iimvume ze-FM Global okanye uluhlu lwe-UL. Ezi ziqinisekiso zibonelela ngoqinisekiso oluzimeleyo lokuba i-nozzle iya kusebenza ngokuchanekileyo ngokweenkcazo zayo ezipapashiweyo phantsi kweemeko ezinzima zoshishino, ngaloo ndlela yanelisa zombini uphicotho lokhuseleko kunye neemfuno zomshuwalense.

Ukugcinwa, Uqeqesho, kunye neendleko ezipheleleyo zobunini

Ixabiso lilonke lobunini (i-TCO) liquka ixabiso lokuqala lokuthenga, ukugcinwa rhoqo, kunye nobomi bokusebenza kwezixhobo. Ukukhethwa kwezinto kudlala indima ephambili kwi-TCO. I-aluminium eyomeleleyo iyinto eqhelekileyo ngenxa yeempawu zayo ezilula, kodwa kwiindawo ezirhabaxa ezifana neendawo zokucocisa zaselunxwemeni okanye izityalo zeekhemikhali, ithusi elinzima okanye intsimbi engatyiwayo inokufuneka ukuthintela ukubola ngokukhawuleza.

Iindleko zoqeqesho nazo kufuneka zifakwe kwi-TCO. Ii-nozzles ezizenzekelayo ezintsonkothileyo zifuna uqeqesho oluqinileyo lomqhubi ukuze zitolike i-flow dynamics kunye nohlahlo-lwabiwo mali oluphezulu lokugcinwa kwe-spring calibrations yangaphakathi, ngelixa ii-nozzles ezithambileyo zifuna ulondolozo oluncinci kwaye zinika ukusebenza okubonakalayo kakhulu.

Inkqubo Esebenzayo Yokukhetha I-Nozzle Yomlilo Efanelekileyo

Ukuseka inkqubo yokuthenga esemgangathweni kuqinisekisa ukuhambelana, ukhuseleko, kunye nokusebenza kakuhle kumaqela okusabela kwiimeko ezingxamisekileyo zoshishino. Indlela ecwangcisiweyo inciphisa umngcipheko wokukhetha izixhobo ezingahambelaniyo okanye ezinobungozi ngokwendalo.

Uvavanyo lweNyathelo ngeNyathelo kunye noLuhlu olufutshane

Inkqubo yovavanyo kufuneka iqale ngovavanyo olupheleleyo lweengozi ukuze kuchongwe iingozi eziphambili zomlilo (umz., izinyibilikisi ze-polar, iigesi ezixinzelelweyo, uthuli olunokutsha). Okulandelayo, iinjineli kufuneka zenzeizibalo ze-hydraulicngokusekelwe kwiimpompo zomlilo ezikhoyo kunye noxinzelelo lweepayipi ezimiyo ukuze kuchongwe ukuhamba komoya okuphezulu kunye noxinzelelo olufumanekayo kwisikhululo sepayipi esikude.

Nje ukuba iiparameter ze-hydraulic zimiselwe, iqela lokuthenga kufuneka lidwelise uluhlu lwee-nozzles ezisebenza ngaphakathi kwale mida—umzekelo, ukucoca ii-nozzles ze-150 GPM ezisebenza kwi-75 PSI. Inyathelo lokugqibela loluhlu olufutshane libandakanya uvavanyo lokuchukumisa ngamalungu e-brigade. Uvavanyo lwasentsimini luvumela abaqhubi ukuba bavavanye i-ergonomics yesiphatho sebheyili, ukugudima kweringi yokukhetha iipateni, kunye nokulawulwa kwamandla okuphendula ngelixa benxibe izixhobo zokuzikhusela zobuqu (PPE).

Iikhrayitheriya zeSigqibo sokugqibela sokuSebenza, ukuThotyelwa kweMithetho, kunye neendleko

Isigqibo sokugqibela sixhomekeke kumlinganiselo olinganayo wokusebenza kwe-hydraulic, ukuthobela imithetho, kunye nemida yezemali. Nangona i-nozzle ye-fog ezenzekelayo ekumgangatho ophezulu inokubonelela ngokuguquguquka okungaqhelekanga kobuchule kunye neendleko zangaphambili eziqala kwi-$800 ukuya kwi-$1,500 ngeyunithi nganye, inokungenisa ubunzima obungafunekiyo kwiziko elifuna ukupholisa ngokukhawuleza, okuphezulu nge-$300 smooth bore tips.

Abenzi bezigqibo kufuneka babeke phambili ukuhambelana ne-foam concentrates kunye ne-proportions ezikhoyo, njengoko iinkqubo ezingahambelaniyo zinokubangela ukuba izixhobo ezibizayo zingasebenzi kwaphela. Ekugqibeleni, ukukhethaumlomo womlilo ochanekileyoifuna ukubeka phambili imida yokhuseleko yomqhubi, ukuqinisekisa ukuba izixhobo ezikhethiweyo zinokubonelela ngesantya esifunekayo sokusetyenziswa (umz., i-0.16 GPM ngenyawo yesikwere kwimililo ethile yokuchitheka) ngaphandle kokudlula imida ebonakalayo yeqela eliphendulayo.

Izinto ezibalulekileyo ekufuneka ziqwalaselwe

• Izigqibo ezibaluleke kakhulu kunye nesizathu sombhobho womlilo
• Iinkcukacha, ukuthobela imithetho, kunye nokuhlolwa komngcipheko okufuneka kuqinisekiswe ngaphambi kokuba uzibophelele
• Amanyathelo alandelayo asebenzayo kunye nezilumkiso abafundi abanokuzisebenzisa ngoko nangoko

Imibuzo ebuzwa qho

Loluphi uhlobo lomlomo womlilo olulungele ukusetyenziswa ixesha elide kumlilo wemizi-mveliso?

I-nozzle ethambileyo idla ngokuba yeyona ifanelekileyo xa ifikelela ixesha elide kwaye ingena nzulu. Isebenza malunga ne-50 PSI, inika amandla aphantsi okusabela, kwaye ifanele imililo yemizi-mveliso eshushu kakhulu apho uzinzo lomlambo lubalulekile.

Ndingayikhetha nini i-nozzle yenkungu endaweni ye-nozzle egudileyo?

Khetha umlomo wenkungu xa ufuna iipateni ezihlengahlengiswayo, ukhuseleko lwabasebenzi, okanye ukufakwa kwefoam. Iluncedo kwiinkqubo zeekhemikhali, imigca yegesi, kunye neemeko ezifuna ikhowuni ebanzi yokukhusela okanye ulawulo lokuhamba oluguquguqukayo.

Ndingawufanisa njani uxinzelelo lwe-nozzle nenkqubo yam yomlilo?

Jonga uxinzelelo olusebenzayo lwe-nozzle ngokumalunga nepompo yakho, ulwakhiwo lwepayipi, kunye nokuhamba okulindelekileyo. Ukungalingani kunokunciphisa ukufikelela okanye kudale amandla okuphendula agqithisileyo, okwenza i-nozzle ibe nzima kwaye ingakhuseleki ukuyilawula.

Zeziphi iziqinisekiso ekufuneka abathengi bemizi-mveliso bazijonge kwi-nozzle yomlilo?

Khangela iimveliso ezihlangabezana neemfuno zemarike yakho kunye neprojekthi yakho, ezifana ne-UL/FM, i-LPCB, i-BSI, i-TUV, okanye i-MED apho kufanelekileyo. Ukuthenga kwihlabathi liphela, qinisekisa ukuba umenzi une-ISO 9001:2015 quality management.

Ngaba i-NBWorldFire inokubonelela ngeempumlo zomlilo kwiiprojekthi zoshishino nezolwandle?

Ewe. I-NBWorldFire yenza imilomo yepayipi kunye nezixhobo zokukhusela umlilo ezinxulumene noko ezisetyenziselwa imboni kunye nolwandle, ixhasa abathengi be-B2B behlabathi abafuna iimveliso ezithembekileyo neziqinisekisiweyo ezihambelana neemfuno ezahlukeneyo zomngcipheko kunye nokuthobela imithetho.