Dab tsi ua rau Cable "Muaj Kev Nyab Xeeb" rau Cov Ntawv Thov Mining?
Hauv cov chaw khawb thee hauv av, qhov muaj cov pa roj methane thiab cov hmoov av thee uas kub hnyiab tau ua rau muaj kev pheej hmoo tawg tas li. Ib qho hluav taws xob los ntawm cov khoom siv hluav taws xob—xws li cov xov hlau—tuaj yeem ua rau tag nrho lub chaw khawb thee kub hnyiab. Qhov no yog qhov uasMuaj Kev Nyab Xeeb Sab Hauv (IS)cov cables ua qhov tseem ceeb.
Tsis zoo li cov khoom siv tiv taus hluav taws (Ex-d) uas muaj cov khoom tawg,Kev Nyab Xeeb Sab Hauv (Ex-i)tiv thaiv kev kub hnyiab los ntawm kev tsim - txwv lub zog hluav taws xob (voltage, tam sim no, thiab kub) rau qib uas tsis tuaj yeem kub hnyiab rau huab cua txaus ntshai. Rau cov ntawv thov mining tswj hwm los ntawm cov qauv zoo liIEC 60079-11, BS 6704, thiab DGMS cov kev cai, lub cable tsis yog tsuas yog ib qho passive connector xwb - nws yog ib qho active safety component uas nws cov hluav taws xob parameters yuav tsum tau tswj hwm nruj me ntsis.
Phau ntawv qhia no muab cov lus piav qhia ntxaws ntxaws, raws li cov ntaub ntawv qhia txog yam ua rau ib txoj hlua "muaj kev nyab xeeb" rau kev khawb av - suav nrog cov qauv ntawv pov thawj, cov kev teeb tsa hluav taws xob, cov kev cai tsim kho, thiab cov qauv xaiv rau cov ntawv thov xws li cov khoom siv kuaj roj mus rau cov tes hauj lwm sensor.
1. Lub Ntsiab Cai Tseem Ceeb: Dab Tsi Ua Rau Lub Circuit "Muaj Kev Nyab Xeeb"?
Kev Nyab Xeeb Sab Hauv (IS) yog ib txoj kev tiv thaiv raws likev txwv zogLub tswv yim tseem ceeb yog yooj yim tab sis nruj heev: xyuas kom meej tias nyob rau hauv kev ua haujlwm ib txwm lossis qhov xwm txheej tsis zoo, lub zog hluav taws xob muaj tsis tuaj yeem hlawv cov huab cua nyob ib puag ncig uas yooj yim hlawv.
| Cheebtsam | Qhov chaw | Kev Ua Haujlwm | Piv txwv li kev khawb av |
| Cov Khoom Siv Txuas | Thaj Chaw Muaj Kev Nyab Xeeb (lossis Thaj Chaw 2) | Txwv lub zog rau thaj chaw txaus ntshai ntawm Zener barriers lossis galvanic isolators | Kev muab hluav taws xob rau lub kaw lus saib xyuas roj |
| YOG Cable | Thaj Chaw Muaj Kev Phom Sij (Cheeb Tsam 0/1) | Xa cov zog txwv nrogtswj tau capacitance (Cc) thiab inductance (Lc) | Kev sib txuas ntawm sensor cable |
| IS Cov Khoom Siv | Thaj Chaw Muaj Kev Phom Sij (Cheeb Tsam 0/1) | Cov khoom siv yooj yim lossis tau ntawv pov thawj uas ua haujlwm hauv cov kev txwv zog | Lub tshuab ntes methane, lub teeb hau |
Kev Nkag Siab Tseem Ceeb rau Cables:Lub xov hlau txuas lub laj kab rau lub cuab yeej teb yuav tsum tsis txhob khaws lub zog txaus (ua lub zog capacitive lossis inductive) los tsim lub hluav taws xob uas muaj peev xwm hluav taws xob yog tias lub xov hlau tawg lossis luv. Lub xov hlau mining txheem nrog lub peev xwm siab tuaj yeem kov yeej lub laj kab kev nyab xeeb tag nrho.
2. Cov Qauv Tseem Ceeb: IEC 60079-11, BS 6704 & DGMS
Cov xov hlau uas muaj kev nyab xeeb hauv kev khawb av yuav tsum ua raws li cov qauv thoob ntiaj teb thiab cheeb tsam.
| Tus Qauv | Scope | Qhov Yuav Tsum Tau Ua Rau Cables |
| IEC 60079-11 | Tus qauv thoob ntiaj teb rau kev tsim qauv kev nyab xeeb sab hauv | Qhia meej txog cov kev cai rau cov khoom sivthiab cov kab sib txuas |
| IEC 60079-14 | Tsim thiab teeb tsa tsob nroj | Cov Lus Cog Tsegxim coding xiavrau IS circuits; kev sib cais ntawm cov xov hlau uas tsis yog IS |
| BS 6704: 1996 | Cov cai ntawm kev xyaum ua haujlwm hauv UK rau cov chaw mines thee | Muabqhov sib piv ntawm inductance / resistancerau cov cables hom mining (Xov tooj, Signaling, Pliable Armored) |
| DGMS (Is Nrias teb) | Cov cai tswjfwm kev nyab xeeb ntawm cov chaw ua haujlwm thee | Yuav tsum ua raws li IS/IEC 60079-11 (Ex-ia/Ex-ib) nrog daim ntawv pov thawj QAN/QAR |
(Daim duab qhia txog kev siv tshuab khawb av kom muaj kev nyab xeeb) Cov Ntsiab Lus Tseem Ceeb:Kev ua raws li txoj cai tsis tuaj yeem sib tham tau. Rau cov chaw khawb thee hauv av, IS cables yuav tsum tau ntawv pov thawj ua ib feem ntawm "system entity" nrog rau lub barrier thiab sensor. Lub cable tsis tuaj yeem hloov pauv tau yam tsis muaj kev sib tham.
3. Cov Qib Kev Nyab Xeeb Sab Hauv: Ex-ia vs. Ex-ib
Tsis yog txhua lub voj voog uas muaj kev nyab xeeb muaj tib theem kev tiv thaiv. Qhov sib txawv yog nyob rau hauv tus naj npawb ntawm qhov yuam kev uas lub kaw lus tuaj yeem ua tau.
| Kev Ntsuas | Kev Ua Txhaum Cai | Thaj Chaw Siv Tau | Piv txwv ntawm daim ntawv thov khawb av |
| Txij no mus | Ob qhov txhaum cai ywj pheej (Kev nyab xeeb siab tshaj plaws) | Cheeb Tsam 0(Kev pheej hmoo tawg tas mus li) | Cov cuab yeej ntes roj methane hauv lub ntsej muag ntev |
| Ex-ib | Ib qho txhaum ib zaug xwb (Kev nyab xeeb siab) | Cheeb Tsam 1(Yuav muaj kev pheej hmoo tawg) | Cov twj tso kua mis, cov khoom siv tswj kev thauj khoom |
Kev cuam tshuam rau kev xaiv Cable:Cov voj voog Ex-ia xav tau cov kev txwv nruj dua ntawm cov kev teeb tsa cable L/C dua li Ex-ib kom ntseeg tau tias muaj kev nyab xeeb nyob rau hauv cov xwm txheej ob zaug.
4. Cov Kev Ntsuas Tseem Ceeb ntawm Cable: Capacitance & Inductance Txwv
Cov kev ntsuas hluav taws xob tseem ceeb tshaj plaws rau IS cable yog nwslub peev xwm faib tawm (Cc)thiabkev cuam tshuam (Lc)ib chav ntev.
- Vim li cas Capacitance thiaj tseem ceeb:Thaum ib txoj hlua ntev khiav ntawm ib qho thaiv mus rau ib lub sensor, txoj hlua ua haujlwm zoo li lub capacitor. Yog tias txoj hlua raug txiav tawm, qhov hluav taws xob khaws cia no tuaj yeem tso tawm ua hluav taws xob. Qhov hluav taws xob ntau dhau txhais tau tias muaj hluav taws xob uas tuaj yeem hlawv tau.
- Vim li cas Inductance thiaj tseem ceeb:Cov khoom siv inductive (coils, motors, lossis tsuas yog lub voj voog hlau) tuaj yeem tsim cov hluav taws xob siab thaum lub voj voog qhib.
Kev Siv Tau:Ib txoj hlua hluav taws xob txheem yuav muaj peev xwm loj, txwv qhov kev ncua deb ntawm qhov thaiv thiab lub sensor. Ib txoj hlua hluav taws xob IS-certified yog tsim nrogkev rwb thaiv tsev uas muaj peev xwm tsawg (piv txwv li, Polyethylene lossis XLPE)kom ua kom ntev tshaj plaws.
Tus qauv BS 6704 qhia meej txog qhov nonominal inductance thiab resistance ratiosrau:
- Cov xov tooj(Rau cov coms hauv thaj chaw gassy).
- Cov xov hlau teeb liab(Rau kev tswj chaw taws teeb).
- Cov xov hlau uas yooj ywm thiab cov xov hlau uas muaj hlau nplaum(Rau lub zog fais fab thiab cov hluav taws xob sib xyaw).
5. Kev Tsim Kho: Cov Cables Uas Muaj Screened vs. Cov Cables Uas Tsis Muaj Screened
Cov chaw khawb av muaj suab nrov hluav taws xob (VFDs, cov cav hluav taws xob siab). Kev tiv thaiv yog qhov tseem ceeb rau kev ua haujlwm ntawm lub teeb liab, tab sis nws hloov cov kev nyab xeeb hluav taws xob ntawm cov xov hlau.
| Feature | Qhov Yuav Tsum Tau Ua | Vim Li Cas Nws Tseem Ceeb Rau Kev Ua Mining |
| Kev Tshuaj Xyuas (Kev Tiv Thaiv) | Tag Nrho Braid (Screened)yuav tsum tau rau kev sib raug zoo ntawm electromagnetic | Tiv thaiv kev ua yuam kev ntawm cov pa roj sensors hauv cov chaw muaj EMI siab |
| Cov Khoom Siv Rwb Thaiv Tsev | PE (Polyethylene)los yogXLPE(Low εᵣ) | Qhov dielectric tsis hloov pauv qis dua = Capacitance qis dua = Qhov nrug IS ntev dua |
| Kev Siv Xim | Xiav-Xiav(RAL 5015) lub plhaub sab nraud | Txheeb xyuas IS circuit kom tiv thaiv kev sib txuas tsis raug rau lub zog uas tsis yog IS |
| Tus Neeg Coj | Tooj liab yooj ywm(Chav Kawm 5/6 txoj kev poob qis) | Tiv taus kev co hauv cov chaw khawb av ntev thiab cov tsheb thauj neeg |
(Seem hla ntawm cov xov hlau uas tau ntawv pov thawj Intrinsically Safe mining) Cov Lus Qhia Txog Kev Siv Cable Uas Muaj Screened Mining:Rau cov chaw uas muaj kev cuam tshuam ntau (piv txwv li, nyob ze cov tshuab txiav plaub hau ntev),cov xov hlau uas tau tshuaj xyuas (braided)nyiam dua. Txawm li cas los xij, lub hlau tiv thaiv yuav tsum tau grounded kom zoo (ib qho) kom tsis txhob tsim lub voj voog av uas khaws cov zog txaus ntshai.
6. Cov Lus Qhia Tseem Ceeb (Daim Ntawv Qhia Txog Cov Ntaub Ntawv)
Thaum tshuaj xyuas daim ntawv qhia txog IS cable rau kev khawb av, nrhiav cov nqi tshwj xeeb no kom paub tseeb tias muaj kev sib raug zoo ntawm daim ntawv pov thawj.
| Cov Qauv | Tus nqi ntawm IS Cable | Vim Li Cas Nws Tseem Ceeb |
| Capacitance (Core rau Core) | ≤ 150 nF/km(Tus Qauv) piv rau > 300 nF/km rau cov uas tsis yog IS | Lub peev xwm siab dua txo qhov kev ncua deb ntawm qhov thaiv |
| Capacitance (Core rau Screen) | ≤ 250 nF/km | Tseem ceeb rau cov xov hlau uas siv ze ntawm VFDs |
| Kev cuam tshuam | ≤ 0.8 mH / km | Tiv thaiv kom tsis txhob muaj qhov hluav taws xob txaus ntshai thaum hloov cov sensors |
| L/R Piv | ≤ 30 µH/Ω(Txhais los ntawm BS 6704 Rooj B.1) | Sib phim cov kev nyab xeeb ntawm Zener barrier |
| Kev Ntsuas Kub (Cable) | -40°C txog +90°C(PVC) los yog -65°C txog +200°C (FEP) | Cov xov hlau uas siv rau kev khawb av yuav tsum yog cov uas tiv taus hluav taws (IEC 60332-1) |
| Kev Ntsuas Hluav Taws Xob (AC) | 300/500V | IS systems tsis muaj zog/fais fab ntau |
7. Txoj Cai "Xiav-Xiav": Kev Txheeb Xyuas Pom
IEC 60079-14 yuav tsum ua kom nruj heevcov voj voog muaj kev nyab xeeb sab hauv yuav pom tau los ntawm xim xiav kaj(RAL 5015).
- Xim ntawm lub hnab:Lub plhaub sab nraud ntawm cov xov hlau mining yuav tsum yog xim xiav.
- Cim:Cov hlua yuav tsum tau cim nrog Ex-ia lossis Ex-ib kom ruaj khov.
- Cov Chaw Nres Tsheb:Cov chaw txuas kuj yuav tsum siv cov khoom rwb thaiv tsev xiav lossis cov ntawv lo.
Yog tias koj siv cov xov hlau dub rau kev siv IS, nws yuav ua tsis tau raws li cov cai ua ntej koj txawm tias qhib nws.
8. Cov Cables Sensor Yooj Yim rau Kev Siv Mining Automation
Cov kev khawb av niaj hnub siv "Cov Cables Sensor Flexible" rau cov khoom siv xws li lub tsheb thauj neeg, cov ru tsev bolters, thiab cov ntaub thaiv phab ntsa ntev.
- Qhov Yuav Tsum Tau Ua:Kev ywj pheej siab (Chav kawm 6 stranding) kom muaj sia nyob tas mus li bending.
- Kev Tsim Kho:Cov xov tooj liab zoo + PUR lub tsho (rau kev tiv taus kev sib txhuam) + Braided screen.
- Qhov cuam tshuam ntawm IS:Cov xov hluav taws xob dynamic no yuav tsum tswj lawv cov kev teeb tsa hluav taws xob (Capacitance/Inductance) txawm tias tom qab ntau lab lub voj voog flex. Ib txheej rwb thaiv tsev tawg ua rau lub peev xwm hloov pauv thiab ua rau lub tswv yim IS tsis zoo.
9. Cov Ntawv Thov Mining Uas Yuav Tsum Muaj IS Cables
IS cables yog qhov yuav tsum muaj rau txhua lub voj voog qis zog nkag mus rau hauv thaj chaw muaj kev phom sij.
| Daim Ntawv Thov | Thaj Chaw | Kev Ntsuas IS | Cov yam ntxwv ntawm cable |
| Cov Khoom Siv Tshuaj Methane | Cheeb Tsam 0 | Txij no mus | Capacitance qis, Lub hnab xiav kaj |
| Cov Txheej Txheem Ceeb Toom Thaum Nyob Ze (PWS) | Cheeb Tsam 1 | Ex-ib | Tshuaj ntsuam (EMI tiv thaiv), Yooj yim rau nruab |
| Teeb thiab Telemetry ntawm lub kaus mom | Cheeb Tsam 1 | Ex-ia/Ex-ib | Kev Sib Xyaws (Lub Zog + Cov Ntaub Ntawv) |
| Cov Kev Sib Txuas Lus Hauv Av | Cheeb Tsam 1 | Ex-ib | Cov lus qhia txog xov tooj ib BS 6704 |
10. Cov Kev Cai ntawm Lub Chaw: Vim Li Cas Koj Thiaj Tsis Siv Tau Ib Qho Cable
Rau ib txoj hlua kom "Muaj Kev Nyab Xeeb Hauv," nws yuav tsum ua kom tau raws li qhov"Lub Tswv Yim ntawm Lub Koom Haum":
- Cov Tso Tawm Teeb Meem:Voc (Qhov siab tshaj plaws qhib hluav taws xob), Isc (Qhov siab tshaj plaws luv luv tam sim no), Ca (Qhov siab tshaj plaws tso cai capacitance), La (Qhov siab tshaj plaws tso cai inductance).
- Kev Muaj Tseeb ntawm Cable:Cc (Cable capacitance ib ko taw), Lc (Cable inductance ib ko taw).
- Cov cuab yeej teb:Ci (Lub peev xwm sab hauv), Li (Lub inductance sab hauv).
Cov Qauv Txheeb Xyuas:
- Cc (cable) + Ci (ntaus) ≤ Ca (kev thaiv)
- Lc (cable) + Li (ntaus ntawv) ≤ La (kev thaiv)
Yog tias ib qho ntawm cov kev ntsuas no tsis tau teev nyob rau ntawm daim ntawv qhia cable, nws yogtsis yogib txoj hlua khi uas muaj kev nyab xeeb.
Txog Dingzun Cable: Koj Tus Khub Kev Nyab Xeeb Hauv Kev Ua Mining
Nrog20+ xyoo ntawm kev tsim khoom tshwj xeeb, Dingzun Cable yog tus neeg muab khoom pov thawj ntawmCov cuab yeej siv ruaj ntseg thiab cov xov hlau sensor yooj ywmrau kev lag luam mining thoob ntiaj teb.
(Kev teeb tsa cov xov hlau uas yooj ywm thiab muaj kev nyab xeeb uas muaj kev tshuaj ntsuam xyuas) Peb Cov Kev Muaj Peev Xwm Cable Mining Muaj Kev Nyab Xeeb:
| Muaj peev xwm | Cov Lus Qhia Tshwj Xeeb ntawm Dingzun |
| Kev Ua Raws Cai ntawm Daim Ntawv Pov Thawj | IEC 60079-11 (Ex-ia/Ex-ib), BS 6704, RoHS |
| Tus Neeg Coj | Tooj Liab Qab/Tinned (Chav Kawm 5/6 flexible stranding) |
| Kev rwb thaiv tsev | XLPE los yog PE(Lub peev xwm qis |
| Kev tiv thaiv | Tag Nrho Tinned Tooj Liab Braid(≥85% kev pab them nqi, Screened Mining Cable) |
| Kev Siv Xim | Lub Tsho Xiav-Xiavraws li IEC 60079-14, nrog rau cov cim Ex ruaj khov |
| Cov Khoom Siv Tsho | PVC, LSZH, los yogTXAWM LI CAS LOS XIJ(Tiv taus roj/Hluav taws rau cov ntawv thov longwall) |
| Kev Ntsuas Txog Kev Kho Tshuab | Kev ua haujlwm tsis zoo, -40 ° C txog + 90 ° C |
Vim li cas Dingzun Cable rau Mining:
- Kev hloov kho tau yooj yim heev— Suav tus lej khub, ntsuas tus neeg xyuas pib, tiv thaiv, thiab luam ntawv raws li qhov chaw tshwj xeeb.
- Pab neeg ua haujlwm tsim khoom tshaj lij— Kev txhawb nqa rau kev xam cov yam ntxwv ntawm cov khoom (Ca, La) kom ntseeg tau tias muaj kev sib raug zoo ntawm cov teeb meem.
- Kev sib txuas lus ncaj qha rau cov kws tshaj lij- Cov lus hais sai, cov ntaub ntawv qhia txog kev siv tshuab, thiab kev xa khoom thoob ntiaj teb.
Xyuas kom koj lub mine muaj kev nyab xeeb nrog cov cabling IS uas tau ntawv pov thawj.[Tiv tauj peb pab neeg kev tshaj lij hnub no rau kev sab laj lossis kev coj ua qauv].