Shenhai Explosion-Proof
Txhais
Qhov ntsuas kev tiv thaiv tawg, chav kawm kub, tawg tiv thaiv hom, thiab siv cov cim cim hauv cheeb tsam yog qhov tseem ceeb rau kev ntsuas cov khoom siv hluav taws xob tawg. Cov ntaub ntawv no yog siv los piav qhia txog qib kev tiv thaiv kev tawg, qhov kub thiab txias nyob rau hauv uas cov cuab yeej siv tau zoo, hom kev tiv thaiv tawg tau muab, thiab cov chaw tsim khoom uas tsim nyog.
Noj Ex demo IIC T6 GB ua piv txwv
EX
Cov cim no qhia tau hais tias cov khoom siv hluav taws xob ua tau raws li ib lossis ntau hom kev tawg-pov thawj hauv cov qauv kev tawg-pov thawj;
Raws li cov kev qhia tshwj xeeb tau teev tseg hauv Tshooj Lus 29 ntawm GB3836.1-2010 tus qauv, nws yog ib qho kev xav tau rau Cov khoom siv hluav taws xob tawg dais qhov txawv “Ex” cim nyob rau hauv ib qho chaw tseem ceeb ntawm nws lub cev sab nraud. Ntxiv thiab, cov khoom siv lub npe yuav tsum tso saib qhov tsim nyog tawg-pov thawj cim nrog rau tus lej pov thawj uas txheeb xyuas nws
kev ua raws cai.
Demb
Cov khoom siv hluav taws xob tawg ua pov thawj pom qhov kev tiv thaiv tawg tau txiav txim siab qhov tshwj xeeb tawg tsam tsam nws yog tsim los rau.
Hom tawg pov thawj
| Hom tawg pov thawj | Explosion proof type marking | Sau ntawv |
|---|---|---|
| Flameproof hom | d | |
| Ntau hom kev nyab xeeb | e | |
| Pressurized | p | |
| Intrinsically muaj kev nyab xeeb hom | yog | |
| Intrinsically muaj kev nyab xeeb hom | ib | |
| Roj ntxeem tau hom | o | |
| Xuab zeb filling hom | q | |
| Adhesive sealing hom | m | |
| N-hom | n | Cov qib tiv thaiv tau muab faib ua MA thiab MB. |
| Hom tshwj xeeb | s | Kev faib tawm suav nrog nA, nR, thiab n-concave hom |
Nco tseg: Lub rooj nthuav tawm cov hom kev tiv thaiv kev tawg ntau heev rau cov khoom siv hluav taws xob, nthuav qhia kev sib xyaw ua ke ntawm ntau yam kev tiv thaiv tawg los ua hybrid explosion tiv thaiv hom.
Piv txwv li, lub npe “Ex dab” txhais tau hais tias ib hom kev tiv thaiv tawg hybrid rau cov khoom siv hluav taws xob, koom nrog flameproof, nce kev nyab xeeb, thiab cov txheej txheem encapsulation.
Kev faib tawm ntawm cov cheeb tsam hauv thaj chaw uas muaj kev phom sij rau cov pa tawg:
Nyob rau hauv cov cheeb tsam uas tawg gases thiab nplaim taws vapors ua ke nrog huab cua los tsim cov roj sib tov sib xyaw, Peb cheeb tsam kev faib tawm raws li qib kev phom sij raug tsim:
Zone 0 (hu ua Zone 0): Ib qhov chaw uas tawg cov pa sib tov tsis tu ncua, nquag, los yog tsis tu ncua nyob rau hauv ib txwm muaj xwm txheej.
Zone 1 (hu ua Zone 1): Ib qhov chaw uas muaj cov roj sib xyaw ua ke tuaj yeem tshwm sim hauv ib txwm muaj.
Zone 2 (hu ua Zone 2): Ib qhov chaw uas cov roj sib tov sib xyaw tsis xav tias yuav tshwm sim raws li qhov xwm txheej ib txwm muaj, tab sis tsuas yog tshwm sim luv luv thaum muaj qhov tshwm sim txawv txav.
Nco tseg: Cov xwm txheej ib txwm hais txog kev pib ua haujlwm tsis tu ncua, kaw, kev ua haujlwm, thiab kho cov cuab yeej siv, thaum cov xwm txheej txawv txav cuam tshuam rau cov khoom siv ua haujlwm tsis zoo lossis
kev ua tsis ncaj ncees lawm.
Kev sib raug zoo ntawm thaj chaw uas muaj kev pheej hmoo ntawm cov pa tawg thiab lawv cov kev tiv thaiv tawg tau zoo sib xws.
| Gas pawg | Qhov siab tshaj qhov ntsuas kev nyab xeeb MESG (mm) | Yam tsawg kawg ignition tam sim no piv MICR |
|---|---|---|
| IIA | MESG> 0.9 | MICR> 0.8 |
| IIB | 0.9MESG＞ 0.5 | 0.8≥MICR≥0.45 |
| IIC | 0.5≥ MSG | 0.45＞ MICR |
Nco tseg: Xav txog cov xwm txheej tshwj xeeb hauv peb lub tebchaws, kev siv e-type (nce kev nyab xeeb) Cov khoom siv hluav taws xob raug txwv rau Zone 1, tso cai rau:
Cov kab hluav taws xob thiab cov thawv sib txuas uas tsis ua kom muaj hluav taws xob, arcs, los yog qhov kub thiab txias thaum lub sijhawm ua haujlwm tsis tu ncua yog cais raws li d lossis m hom rau lub cev thiab e hom rau cov hlua txuas.
Piv txwv li, Kev tiv thaiv tawg ntawm BPC8765 LED tawg-pov thawj platform teeb yog Ex demb IIC T6 GB. Lub teeb qhov chaw compartment yog flameproof (d), tus tsav tsheb circuit seem yog encapsulated (mb ib), thiab cov yam ntxwv ntawm cov kab mob nce kev nyab xeeb (e) rau kev tsim khoom tawg-pov thawj. Raws li cov specifications tau hais los saum no, Lub teeb no tuaj yeem siv hauv Zone 1.
II
Cov cuab yeej cuab tam ntawm cov cuab yeej hluav taws xob tawg tau txiav txim siab nws qhov tsim nyog rau qee qhov chaw tawg tawg.
Cov khoom tawg-pov thawj txhais tau tias yog cov khoom siv hluav taws xob uas, nyob rau hauv tej yam kev mob, tsis txhob ignite ib puag ncig tawg.
Li no, cov khoom uas muaj npe nrog cov lus hais txog kev tawg-pov thawj (EX demb IIC) tshwj xeeb tshaj yog tsim nyog rau txhua qhov chaw tawg roj, tsis suav cov thee mines thiab underground chaw.
C
Cov pa roj ntawm cov khoom tawg-pov thawj hluav taws xob txiav txim siab nws txoj kev sib raug zoo nrog cov roj sib xyaw tshwj xeeb.
Txhais ntawm Gas Group:
Nyob rau hauv txhua qhov chaw tawg pa taws, tshwj tsis yog rau cov mines thiab cov chaw hauv av (i.e., ib puag ncig haum rau cov khoom siv hluav taws xob Class II), explosive gases tau muab faib ua peb pawg, yog A, B, thiab C, raws li qhov kev sim siab tshaj plaws kev nyab xeeb qhov sib txawv lossis qhov tsawg kawg nkaus ignition tam sim no piv ntawm cov roj sib tov. Gas grouping thiab ignition kub yog nyob ntawm qhov concentration ntawm combustible gas thiab huab cua nyob rau hauv ib puag ncig kub thiab siab tej yam kev mob.
Kev sib raug zoo ntawm cov khoom tawg tawg, gas pab, thiab qhov kev sim siab tshaj plaws kev nyab xeeb qhov sib txawv los yog qhov tsawg kawg nkaus ignition tam sim no piv:
| Gas pawg | Qhov siab tshaj qhov ntsuas kev nyab xeeb MESG (mm) | Yam tsawg kawg ignition tam sim no piv MICR |
|---|---|---|
| IIA | MESG> 0.9 | MICR> 0.8 |
| IIB | 0.9MESG＞ 0.5 | 0.8≥MICR≥0.45 |
| IIC | 0.5≥ MSG | 0.45＞ MICR |
Nco tseg: Lub rooj sab laug qhia tau hais tias qhov tseem ceeb me me ntawm cov pa hluav taws xob muaj kev nyab xeeb los yog qhov tsawg kawg nkaus tam sim no sib haum mus rau qib siab ntawm kev pheej hmoo cuam tshuam nrog cov roj tawg.. Li no, muaj kev xav tau ntau ntxiv rau cov kev cai nruj dua cov pa roj hauv cov khoom siv hluav taws xob tawg.
Cov pa roj feem ntau cuam tshuam nrog cov pa roj / cov khoom tawg:
| Gas pab pawg / kub pawg | T1 | T2 | T3 | T4 | T5 | T6 |
|---|---|---|---|---|---|---|
| IIA | Formaldehyde, toluene, methyl ester, acetylene, tshuaj propane, acetone, acrylic acid, tshuaj benzene, styrene ua, carbon monoxide, ethyl acetate hmoov, acetic acid, tshuaj chlorobenzene, methyl acetate, tshuaj chlorine | Methanol, ethanol, ethylbenzene, propanol, propylene, butanol, butyl acetate hmoov, amyl acetate hmoov, cyclopentane | Pentane, pentanol, hexane, ethanol, heptane, octane ua, cyclohexanol, turpentine, naphtha, roj av (suav nrog roj av), roj roj, pentanol tetrachloride | Acetaldehyde, trimethylamine | Ethyl nitrite | |
| IIB | propylene ester, dimethyl ether | Butadiene, epoxy propane hmoov, ethylene | Dimethyl ether, acrolein, hydrogen carbide | |||
| IIC | Hydrogen, dej gas | Acetylene | Cov pa roj carbon disulfide | Ethyl nitrate |
Piv txwv: Nyob rau hauv rooj plaub uas cov khoom txaus ntshai uas muaj nyob rau hauv ib puag ncig explosive gas yog hydrogen los yog acetylene, cov pa roj tau muab rau ib puag ncig no yog categorized li pab pawg C. Yog li ntawd, cov khoom siv hluav taws xob siv nyob rau hauv qhov chaw teeb tsa no yuav tsum ua raws li cov khoom siv roj av tsis muaj tsawg dua IIC qib.
Nyob rau hauv rooj plaub uas cov khoom muaj nyob rau hauv qhov chaw tawg yog formaldehyde, cov pa roj pab pawg tsim los rau ib puag ncig no yog cais raws li pawg A. Yog li ntawd, cov khoom siv hluav taws xob ua haujlwm nyob rau hauv qhov chaw no yuav tsum ua raws li cov pa roj carbon monoxide cov ntsiab lus ntawm tsawg kawg IIA qib. Txawm li cas los, Cov khoom siv hluav taws xob nrog cov pa roj ntawm IIB lossis IIC kuj tuaj yeem siv rau hauv ib puag ncig no.
T6
Cov kub pab pawg neeg raug xa mus rau cov khoom siv hluav taws xob tawg pov thawj txiav txim siab qhov chaw ib puag ncig uas nws tau sib xws hauv cov ntsiab lus ntawm qhov kub thiab txias.
Pawg kub yog txhais raws li hauv qab no:
Kub txwv, hu ua ignition kub, muaj nyob rau explosive gas mixs, txhais qhov kub ntawm qhov lawv tuaj yeem ua tau taws. Yog li ntawd, Cov kev cai tshwj xeeb tswj xyuas qhov kub thiab txias ntawm cov khoom siv hluav taws xob siv nyob rau hauv cov cheeb tsam no, Nws yuav tsum tau muab sau tseg tias qhov siab tshaj plaws saum npoo ntawm cov khoom siv tsis dhau qhov kub ntawm qhov hluav taws kub. Raws li, Cov khoom siv hluav taws xob tau muab faib ua rau pawg, T1-T6, raws li lawv qhov kub ntawm qhov chaw siab tshaj plaws.
| Ignition kub ntawm cov khoom combustible | Qhov siab tshaj plaws saum npoo kub T ntawm cov khoom siv (℃) | Kub pawg |
|---|---|---|
| t450 ua | 450 | T1 |
| 450≥ 300 | 300 | T2 |
| 300≥ t 200 | 200 | T3 |
| 200≥ 135 | 135 | T4 |
| 135≥ t 100 | 100 | T5 |
| 100≥ 85 | 85 | T6 |
Raws li cov ntaub ntawv muab nyob rau hauv lub rooj sab laug, Kev sib raug zoo meej tuaj yeem pom ntawm qhov kub ntawm qhov hluav taws kub ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib raug zoo rau cov khoom siv hluav taws xob tawg.. Tshwj xeeb, raws li lub ignition kub txo, qhov xav tau ntawm cov pab pawg kub rau cov khoom siv hluav taws xob nce.
Qhov kev faib tawm qhov kub thiab txias sib cuam tshuam nrog cov khoom siv hluav taws xob / cov khoom tawg:
| Gas pab pawg / kub pawg | T1 | T2 | T3 | T4 | T5 | T6 |
|---|---|---|---|---|---|---|
| IIA | Formaldehyde, toluene, methyl ester, acetylene, tshuaj propane, acetone, acrylic acid, tshuaj benzene, styrene ua, carbon monoxide, ethyl acetate hmoov, acetic acid, tshuaj chlorobenzene, methyl acetate, tshuaj chlorine | Methanol, ethanol, ethylbenzene, propanol, propylene, butanol, butyl acetate hmoov, amyl acetate hmoov, cyclopentane | Pentane, pentanol, hexane, ethanol, heptane, octane ua, cyclohexanol, turpentine, naphtha, roj av (suav nrog roj av), roj roj, pentanol tetrachloride | Acetaldehyde, trimethylamine | Ethyl nitrite | |
| IIB | propylene ester, dimethyl ether | Butadiene, epoxy propane hmoov, ethylene | Dimethyl ether, acrolein, hydrogen carbide | |||
| IIC | Hydrogen, dej gas | Acetylene | Cov pa roj carbon disulfide | Ethyl nitrate |
Nco tseg: Cov ntaub ntawv muab rau hauv cov lus saum toj no tsuas yog siv rau kev siv xwb. Thov sab laj cov ncauj lus kom ntxaws uas tau teev tseg hauv GB3836 rau daim ntawv thov raug.
Piv txwv: Yog tias cov pa roj carbon disulfide yog cov khoom phom sij hauv qhov chaw tawg, nws sib raug rau cov pab pawg kub T5. Yog li ntawd, Cov pab pawg kub ntawm cov khoom siv hluav taws xob siv nyob rau hauv qhov chaw no yuav tsum yog T5 lossis siab dua. Ib yam li ntawd, Yog hais tias formaldehyde yog cov khoom txaus ntshai nyob rau hauv qhov chaw tawg, nws sib raug rau qhov kub thiab txias pab pawg T2. Yog li ntawd, Cov pab pawg kub ntawm cov khoom siv hluav taws xob siv hauv qhov chaw no yuav tsum yog T2 lossis siab dua. Nws yog ib qho tsim nyog hais tias cov khoom siv hluav taws xob nrog cov pab pawg kub ntawm T3 lossis T4 tuaj yeem siv rau hauv qhov chaw no.
GB
Cov cuab yeej tiv thaiv qib qhia txog qib kev tiv thaiv rau cov khoom siv hluav taws xob tawg, denoting qhov kev ntsuam xyuas kev nyab xeeb ntawm cov khoom siv.
Cov ntsiab lus ntawm cov cuab yeej tiv thaiv qib rau cov pa roj tawg tau muab rau hauv ntu 3.18.3, 3.18.4, thiab 3.18.5 ntawm GB3836.1-2010.
3.18.3
Ga Level EPL Ga
Cov cuab yeej siv rau qhov chaw tawg pa taws nta a “siab” qib kev tiv thaiv, kom ntseeg tau tias nws tsis ua haujlwm li qhov hluav taws xob thaum lub sijhawm ua haujlwm tsis tu ncua, xav ua txhaum, los yog tshwj xeeb malfunctions.
3.18.4
Gb Level EPL Gb
Cov cuab yeej npaj rau qhov chaw tawg pa taws nta a “siab” qib kev tiv thaiv, lav tias nws tsis ua haujlwm li qhov hluav taws xob thaum lub sijhawm ua haujlwm tsis tu ncua lossis xav tias yuav ua txhaum qhov xwm txheej.
3.18.5
Gc Level EPL Gc
Cov cuab yeej npaj siv rau hauv qhov chaw tawg pa taws ua pov thawj a “dav dav” qib kev tiv thaiv thiab tsis ua raws li qhov hluav taws xob hluav taws xob thaum lub sijhawm ua haujlwm tsis tu ncua. Kev tiv thaiv kev tiv thaiv ntxiv tuaj yeem siv los ua kom ntseeg tau tias nws tsis ua haujlwm zoo hauv cov xwm txheej uas yuav tsum muaj qhov hluav taws kub tshwm sim ntau zaus, xws li nyob rau hauv cov ntaub ntawv ntawm teeb pom kev zoo fixture malfunctions.