Nrog rau kev loj hlob ntawm txoj kev loj thiab kev tsheb ciav hlau kev thauj mus los, kev tsim kho ntawm cov tes hauj lwm no inevitably cuam tshuam nrog qhov excavation. Vim muaj qhov tshwm sim ntawm cov pa lom hauv qhov tunnels, peb yuav tsum xav txog qhov tsim nyog ntawm kev txhim kho tunnel gas detectors.
1.Dab tsi yog gases tsim nyob rau hauv tunnels?
Kev tsim kho qhov hauv av thiab cov kav dej inevitably tsim qee cov pa phem thiab cov pa phem. Cov pa roj no ib txwm yog ib qho kev phom sij loj thaum lub sij hawm tsim kho. Cov pa phem thiab cov pa phem tseem ceeb hauv cov qhov av muaj xws li methane, carbon monoxide, hydrogen sulfide, carbon dioxide, thiab cov kab ntawm nitrogen oxides thiab VOC gases.
Raws li lawv cov khoom siv physicochemical, cov pa roj no tau muab faib ua cov pa hluav taws xob thiab cov pa phem. Lub ntsiab flammable gases nyob rau hauv tunnels yog methane (CH4) thiab ib co volatile organic tebchaw (VOCs). Qhov teeb meem tseem ceeb yog tias yog tias cov pa roj ntau dhau qhov kev txwv thiab ntsib cov nplaim taws qhib, nws yuav ua rau tawg, ua rau muaj kev puas tsuaj loj rau cov khoom thiab cov neeg ua haujlwm.
Cov pa roj carbon monoxide nyob rau hauv tunnels feem ntau ua rau muaj kev puas tsuaj rau tib neeg lub luag haujlwm thiab cuam tshuam rau tib neeg lub neej kev nyab xeeb. Cov no suav nrog cov pa roj xws li tshuaj chlorine, phosgene, sulfur dioxide, nitrogen oxides, thiab ammonia. Lawv cov yam ntxwv yog tias lawv muaj qhov ua rau muaj zog ntawm daim tawv nqaij thiab cov mucous membranes, thiab qee qhov kuj corrosive. Asphyxiating gases muaj xws li carbon monoxide, carbon dioxide, thiab nitrogen. Cov pa roj no tsis muaj qhov cuam tshuam rau tib neeg lub luag haujlwm, tab sis lawv tuaj yeem ua rau cellular hypoxia, ua rau asphyxiation.
2.Yuav ua li cas xaiv lub qhov taub roj ntes?
Raws li cov lus saum toj no, peb pom tias cov pa phem thiab cov pa phem hauv qhov av muaj kev cuam tshuam loj rau tib neeg kev noj qab haus huv thiab khoom vaj khoom tsev. Kev txhim kho qhov av ntes cov roj av yog qhov tsim nyog heev.
(1). Ua ntej, cov pa phem thiab cov pa phem no nyob hauv qhov av yog dab tsi?
Raws li kev paub keeb kwm thiab thaj chaw ib puag ncig, cov pa roj ntau tshaj plaws hauv qhov av yog: carbon monoxide, methane, thiab hydrogen sulfide. Cov pa roj no suav nrog cov pa phem thiab hluav taws kub / tawg, ua rau nws yooj yim los txiav txim siab hom roj av xav tau.qee VOC gases.
(2). Xaiv hom tunnel gas detector.
Kev tshawb nrhiav qhov av feem ntau siv cov roj av ruaj khov. Methane yog cov pa taws kub hnyiab, thiab nws qhov tawg yog qhov kev txhawj xeeb tseem ceeb. Lub ntsuas hluav taws xob hluav taws xob nrog ib chav ntawm LEL (Lower Explosive Limit) tuaj yeem xaiv. Hom kev ntes no muaj lub hauv paus ntsiab lus yooj yim, siv dav, thiab muaj cov nqi kho mob tsawg. Kuj tseem muaj cov khoom siv tshuaj lom neeg, xws li carbon monoxide detectors thiab hydrogen sulfide detectors. Cov cuab yeej ntsuas no siv los xyuas seb qhov concentration ntawm cov pa roj carbon monoxide puas siab dhau thiab ua rau muaj kev pheej hmoo rau tib neeg kev noj qab haus huv. Tsis tas li ntawd, yuav tsum xaiv lub ntsuas pa oxygen los xyuas kom meej tias cov pa oxygen concentration hauv qhov av tsis yog qhov qis lossis siab dhau.
3.Product pom zoo:
Huafan tus kheej tsim cov kev soj ntsuam roj (gas host + sojntsuam) kuaj pom cov roj concentration thiab tuaj yeem txuas rau sab sauv -theem computer software thiab LED npo loj.
RS485 Modbus roj ntes thiabgas tswb controller lub kaw lus siv cov txheej txheem tsis yog - tus qauv raws tu qauv lossis MODBUS raws tu qauv rau kev tau txais cov ntaub ntawv thiab xa mus. Cov tshuab xa hluav taws xob txawj ntse sau thiab tshawb xyuas cov roj concentration ntawm -site, thiab tus tswv tsev saib xyuas txhua qhov ntawm. Ua ke nrog cov software ntse, nws muab lub sijhawm tiag tiag - saib xyuas ntawm - qhov hloov pauv roj concentration. Cov ntse transmitter node kuj muab cov kev hloov pauv uas tuaj yeem tswj cov khoom siv sab nraud (xws li cov kiv cua tso pa thiab solenoid li qub). Lub detector ntsuas roj concentration los ntawm ntuj diffusion, siv imported sensors nrog zoo rhiab heev thiab zoo heev repeatability; cov roj ntes siv cov cuab yeej siv microcontroller rau kev ntseeg siab.
Lub detector lub casing yog ua los ntawm cam khwb cia txhuas, muab siab zog, kub kuj, thiab corrosion kuj. Cov khoom no yog tsim rau kev soj ntsuam cov concentration ntawm cov tshuaj lom, teeb meem, flammable, thiab explosive gases nyob rau hauv lub ambient cua, thiab yog dav siv nyob rau hauv metallurgy, fais fab nroj tsuag, tshuaj nroj tsuag, mines, tunnels, underground pipelines, thiab lwm qhov chaw, zoo tiv thaiv kev huam yuaj.