Kodi N’chiyani Chimachititsa Kuti Chingwe Chikhale "Chotetezeka Kwambiri" pa Ntchito Zogwiritsa Ntchito Migodi?
Mu migodi ya malasha ya pansi pa nthaka, kupezeka kwa mpweya wa methane ndi fumbi la malasha loyaka kumapangitsa kuti pakhale chiopsezo chophulika nthawi zonse. Kuwala kamodzi kokha kuchokera ku zida zamagetsi—kuphatikizapo mawaya—kumatha kuyatsa mgodi wonse. Apa ndi pomweYotetezeka Mwachilengedwe (IS)zingwe zimakhala zofunika kwambiri.
Mosiyana ndi zida zotetezera moto (Ex-d) zomwe zimakhala ndi kuphulika,Chitetezo cha Mkati (Ex-i)Zimaletsa kuyatsa moto mwa kapangidwe kake—kuchepetsa mphamvu zamagetsi (voltage, current, ndi kutentha) kufika pamlingo womwe sungathe kuyatsa mlengalenga woopsa. Pa ntchito za migodi zomwe zimayendetsedwa ndi miyezo mongaIEC 60079-11, BS 6704, ndi zofunikira za DGMS, chingwechi sichingokhala cholumikizira chopanda ntchito—ndi gawo logwira ntchito lachitetezo lomwe magawo ake amagetsi ayenera kulamulidwa mosamala.
Bukuli limapereka kufotokozera kwathunthu, kochokera ku deta ya zomwe zimapangitsa chingwe kukhala "chotetezeka mkati" pa ntchito yofukula migodi—kuphatikizapo miyezo ya satifiketi, magawo amagetsi, zofunikira pakupanga, ndi njira zosankhira ntchito kuyambira pa zowunikira mpweya mpaka ma network a masensa.
1. Mfundo Yaikulu: N’chiyani Chimachititsa Kuti Dera Likhale “Lotetezeka M’kati”?
Chitetezo chamkati (IS) ndi njira yodzitetezera yozikidwa pakuchepetsa mphamvuLingaliro lofunikira ndi losavuta koma lokhwima: onetsetsani kuti pansi pa ntchito yabwinobwino kapena vuto, mphamvu zamagetsi zomwe zilipo sizingayatse mlengalenga wozungulira womwe ungayake.
| Chigawo | Malo | Ntchito | Chitsanzo cha Kugoba |
| Chida Chogwirizana | Malo Otetezeka (kapena Zone 2) | Zimaletsa mphamvu ku malo oopsa kudzera mu zotchinga za Zener kapena zochotsa galvanic | Mphamvu yamagetsi yowunikira mpweya |
| Chingwe cha IS | Malo Oopsa (Zone 0/1) | Imatumiza mphamvu zochepa ndimphamvu yolamulira (Cc) ndi inductance (Lc) | Chingwe cholumikizira sensor |
| Chida cha IS | Malo Oopsa (Zone 0/1) | Chipangizo chosavuta kapena chovomerezeka chomwe chimagwira ntchito mkati mwa malire a mphamvu | Chowunikira cha methane, nyali yophimba |
Chidziwitso Chofunika Kwambiri pa Zingwe:Chingwe cholumikiza chotchinga ku chipangizo chakumunda sichiyenera kusunga mphamvu zokwanira (monga capacitive kapena inductive charge) kuti chipange mphamvu yoyatsira ngati chingwecho chasweka kapena chafupika. Chingwe chodziwika bwino choyezera magetsi chokhala ndi capacitance yayikulu chingagonjetse chotchinga chitetezo chonse.
2. Miyezo Yaikulu: IEC 60079-11, BS 6704 & DGMS
Zingwe zotchingira migodi zomwe zili zotetezeka mkati mwake ziyenera kutsatira miyezo yapadziko lonse lapansi komanso yachigawo.
| Muyezo | Chigawo | Zofunikira Kwambiri pa Zingwe |
| IEC 60079-11 | Chiyerekezo chapadziko lonse lapansi cha kapangidwe ka chitetezo chamkati | Amatchula zofunikira pa chipangizochondi mawaya olumikizirana |
| IEC 60079-14 | Kapangidwe ndi kukhazikitsidwa kwa fakitale | Malamulokulemba mtundu wa buluu wopepukaza ma IS circuits; kulekanitsidwa ndi mawaya osakhala a IS |
| BS 6704:1996 | Malamulo a UK okhudza migodi ya malasha | Amaperekama ratio a inductance/resistanceza zingwe zamtundu wa migodi (Foni, Chizindikiro, Zolimba) |
| DGMS (India) | Malamulo achitetezo cha migodi ya malasha | Imafuna kuti IS/IEC 60079-11 (Ex-ia/Ex-ib) itsatire satifiketi ya QAN/QAR |
(Chithunzi cha njira yosungira migodi yotetezeka mkati mwake) Mfundo Zofunika Kuziganizira:Kutsatira malamulo sikungatheke kukambirana. Pa migodi ya malasha yapansi panthaka, zingwe za IS ziyenera kutsimikiziridwa ngati gawo la "dongosolo" pamodzi ndi chotchinga ndi sensa. Chingwecho sichingasinthidwe mwachisawawa.
3. Miyezo Yachitetezo Chamkati: Ex-ia vs. Ex-ib
Si ma circuit onse otetezeka omwe amapereka chitetezo chofanana. Kusiyana kuli mu kuchuluka kwa zolakwika zomwe dongosolo lingathe kuzipirira.
| Mlingo | Kulekerera Zolakwa | Malo Oyenera | Chitsanzo cha Kugwiritsa Ntchito Migodi |
| Kuyambira pano kupita mtsogolo | Zolakwika ziwiri zodziyimira pawokha (Chitetezo Chapamwamba) | Gawo 0(Chiwopsezo chopitirira muyeso) | Zipangizo zozindikira mpweya wa methane pankhope ya longwall |
| Wakale | Cholakwika chimodzi (Chitetezo chachikulu) | Gawo 1(Chiwopsezo choopsa kwambiri) | Masensa apampu, mabwalo owongolera zotumizira |
Zotsatira pa Kusankha Chingwe:Ma circuit a Ex-ia amafuna malire okhwima kwambiri pa ma parameter a L/C a chingwe kuposa Ex-ib kuti atsimikizire chitetezo pansi pa mikhalidwe ya zolakwika ziwiri.
4. Magawo Ofunika a Chingwe: Zolepheretsa za Capacitance & Inductance
Magawo ofunikira kwambiri amagetsi a chingwe cha IS ndi akemphamvu yogawa (Cc)ndiinductance (Lc)pa utali wa yuniti.
- Chifukwa Chake Kuchuluka kwa Mphamvu N'kofunika:Chingwe chachitali chikayenda kuchokera pa chotchinga kupita ku sensa, chingwecho chimagwira ntchito ngati capacitor. Ngati chingwecho chatsekedwa, mphamvu yosungidwayi imatha kutuluka ngati mphamvu. Mphamvu yochuluka imatanthauza mphamvu yoyatsira moto.
- Chifukwa Chake Kusagwira Ntchito Ndi Kofunika:Katundu woyambitsa (ma coil, ma motors, kapena waya wozungulira) amatha kupanga ma spikes amphamvu kwambiri pamene dera latsegulidwa.
Kutanthauza Kothandiza:Chingwe chodziwika bwino choyezera migodi chingakhale ndi mphamvu zambiri, zomwe zimachepetsa mtunda wololedwa pakati pa chotchinga ndi sensa. Chingwe chovomerezeka ndi IS chimapangidwa ndikutchinjiriza kwa mphamvu zochepa (monga Polyethylene kapena XLPE)kuti muwonjezere kutalika kovomerezeka.
Muyezo wa BS 6704 umafotokoza momveka bwino zainductance yodziwika bwino ndi ma resistance ratioskwa:
- Zingwe za foni(Kwa ma com m'madera omwe ali ndi gasi).
- Zingwe zolumikizira(Za zowongolera zakutali).
- Zingwe zotchingira waya zokhotakhota & zitsulo(Za magetsi ndi ma hybrid circuits).
5. Kapangidwe: Zingwe Zoyezera Kumigodi Zosayezera Kuyerekeza ndi Zosayezera Kugonana
Malo opangira migodi amakhala ndi phokoso lamagetsi (ma VFD, ma mota amphamvu kwambiri). Kuteteza ndikofunikira kuti chizindikiro chikhale cholimba, koma kumasintha chitetezo cha chingwe.
| Mbali | Zofunikira Zachizolowezi | Chifukwa Chake Ndi Chofunika Pa Migodi |
| Kuwunika (Kuteteza) | Luko Lonse (Loyeretsedwa)chofunikira kuti chigwirizane ndi maginito amagetsi | Zimaletsa kuyambitsa zabodza kwa masensa a gasi m'malo okhala ndi EMI yambiri |
| Zinthu Zotetezera Kutentha | PE (Polyethylene)kapenaXLPE(Low εᵣ) | Chokhazikika cha dielectric chotsika = Capacitance yotsika = Mtunda wa IS wololedwa wautali |
| Kulemba Makhodi a Mitundu | Buluu Wopepuka(RAL 5015) chidebe chakunja | Imazindikira dera la IS kuti ipewe kulumikizana mwangozi ndi mphamvu yosakhala ya IS |
| Woyendetsa | Mkuwa wosinthasintha(Kusoka kwa gulu la 5/6) | Imapirira kugwedezeka m'magalimoto a longwall migodi ndi ma shuttle |
(Gawo lodutsa la chingwe chovomerezeka cha migodi chotetezeka mkati) Malangizo a Chingwe Choyezera Migodi:Kwa malo omwe ali ndi zosokoneza zambiri (monga pafupi ndi zometa tsitsi za longiwall),zingwe zotchingidwa (zolukidwa)ndi abwino kwambiri. Komabe, chishango chachitsulo chiyenera kukhazikika bwino (mfundo imodzi) kuti chisapange kuzungulira kwa nthaka komwe kumasunga mphamvu zoopsa.
6. Mafotokozedwe Ofunika Kwambiri a Ukadaulo (Pepala la Deta)
Mukayang'ananso deta ya chingwe cha IS kuti mupeze migodi, yang'anani mfundo izi kuti muwonetsetse kuti zikugwirizana ndi satifiketi.
| Chizindikiro | Mtengo Wamba wa Chingwe cha IS | Chifukwa Chake Ndi Chofunika |
| Kuchuluka kwa Mphamvu (Kuyambira Pakati pa Pakati) | ≤ 150 nF/km(Yachizolowezi) vs. > 300 nF/km kwa omwe si a IS | Mphamvu yapamwamba imachepetsa mtunda wotetezeka kuchokera ku chotchinga |
| Kuchuluka kwa Mphamvu (Kuyambira Pakati pa Chinsalu) | ≤ 250 nF/km | Chofunika kwambiri pa zingwe zotetezedwa zomwe zimagwiritsidwa ntchito pafupi ndi ma VFD |
| Kuyendetsa | ≤ 0.8 mH/km | Zimaletsa kukwera kwa magetsi koopsa mukamasinthasintha masensa |
| Chiŵerengero cha L/R | ≤ 30 µH/Ω(Yofotokozedwa ndi BS 6704 Table B.1) | Ikugwirizana ndi magawo achitetezo a Zener barrier |
| Kuyeza Kutentha (Chingwe) | -40°C mpaka +90°C(PVC) kapena -65°C mpaka +200°C (FEP) | Zingwe za migodi ziyenera kukhala zoletsa moto (IEC 60332-1) |
| Kuyeza kwa Voltage (AC) | 300/500V | Machitidwe a IS ndi opanda mphamvu/mphamvu |
7. Lamulo la "Buluu Lopepuka": Kuzindikira Zooneka
IEC 60079-14 imafuna kuti izi zithekemabwalo otetezeka mkati mwake omwe amadziwika ndi mtundu wabuluu wowala(RAL 5015).
- Mtundu wa Chigoba:Chigoba chakunja cha chingwe choyezera migodi chiyenera kukhala chabuluu wopepuka.
- Kulemba:Chingwe chiyenera kukhala ndi chizindikiro cholimba cha Ex-ia kapena Ex-ib.
- Malo ofikira:Malo olumikizira ayeneranso kugwiritsa ntchito chotenthetsera chabuluu chowala kapena zilembo.
Ngati mukugwiritsa ntchito chingwe chakuda chodziwika bwino cha migodi pa pulogalamu ya IS, mwina sichitsatira malamulo a code musanachiyatse.
8. Zingwe Zosinthasintha Zosewerera Zogwiritsa Ntchito Migodi
Migodi yamakono imagwiritsa ntchito "Ma Flexible Sensor Cables" pazida monga magalimoto oyendera, mabotolo a padenga, ndi zishango za makoma aatali.
- Chofunikira:Kusinthasintha kwakukulu (Kupindika kwa Gulu 6) kuti kupulumuke kupindika kosalekeza.
- Kapangidwe kake:Zingwe za mkuwa zabwino kwambiri + jekete la PUR (loteteza ku kukwawa) + Chophimba cholukidwa.
- Kufunika kwa IS:Zingwe zosinthasinthazi ziyenera kusunga magawo awo amagetsi (Capacitance/Inductance) ngakhale zitatha kusinthasintha kwa mamiliyoni ambiri. Chovala chosungunuka chomwe chimasweka chimasintha mphamvu ya magetsi ndikusokoneza lingaliro la IS entity.
9. Ntchito Zogwiritsa Ntchito Migodi Zofuna Zingwe za IS
Zingwe za IS ndizofunikira kwambiri pa ma circuits onse opanda mphamvu zambiri omwe amalowa m'malo oopsa.
| Kugwiritsa ntchito | Malo | Muyeso wa IS | Chingwe Mbali |
| Zowunikira Mpweya wa Methane | Gawo 0 | Kuyambira pano kupita mtsogolo | Kuchepa kwa Capacitance, Chidebe cha Buluu Wopepuka |
| Machitidwe Ochenjeza Pafupi (PWS) | Gawo 1 | Wakale | Yoyesedwa (chitetezo cha EMI), Yosinthasintha |
| Nyali za Zipewa ndi Telemetry | Gawo 1 | Ex-ia/Ex-ib | Hybrid (Mphamvu + Deta) |
| Machitidwe Olumikizirana Mobisa | Gawo 1 | Wakale | Mafotokozedwe a foni malinga ndi BS 6704 |
10. Ma Parameter a Entity: Chifukwa Chake Simungagwiritse Ntchito Chingwe Chilichonse
Kuti chingwe chikhale "Chotetezeka Mwachilengedwe," chiyenera kukwaniritsa zomwe"Lingaliro la Chipani":
- Cholepheretsa Chotulutsa:Voc (Voteji yotseguka kwambiri), Isc (Yotsika kwambiri yafupikitsa mphamvu yamagetsi), Ca (Capacitance yololedwa kwambiri), La (Inductance yololedwa kwambiri).
- Zoona za Chingwe:Cc (Capacitance ya chingwe pa phazi), Lc (Kulowa kwa chingwe pa phazi).
- Chipangizo cha M'munda:Ci (Capacitance Yamkati), Li (Inductance Yamkati).
Fomula Yotsimikizira:
- Cc (chingwe) + Ci (chipangizo) ≤ Ca (chotchinga)
- Lc (chingwe) + Li (chipangizo) ≤ La (chotchinga)
Ngati chilichonse mwa magawo awa sichinalembedwe pa datasheet ya chingwe, ndiye kutiosatichingwe chotetezeka mkati.
Zokhudza Chingwe cha Dingzun: Mnzanu Woteteza Kumigodi
NdiZaka 20+ zogwira ntchito yapadera yopanga zinthu, Dingzun Cable ndi kampani yovomerezeka yopereka chithandizo chaZida zotetezeka mkati mwake komanso zingwe zosinthika za sensorkwa makampani opanga migodi padziko lonse lapansi.
(Kuyika chingwe chosinthika komanso chotetezedwa mkati mwake) Mphamvu Zathu Zotetezera Zachingwe Zamigodi:
| Kutha | Mafotokozedwe a Dingzun |
| Kutsatira Chitsimikizo | IEC 60079-11 (Ex-ia/Ex-ib), BS 6704, RoHS |
| Woyendetsa | Mkuwa Wopanda Chidebe (Kulukana kwa kalasi 5/6) |
| Kuteteza kutentha | XLPE kapena PE(Kuchepa kwa capacitance |
| Kuteteza | Choluka cha Mkuwa Chopangidwa ndi Tin(≥85% ya kufalikira, Chingwe Choyezera Kumanga) |
| Kulemba Makhodi a Mitundu | Chigoba cha Buluu Wopepukamalinga ndi IEC 60079-14, yokhala ndi chizindikiro cholimba cha Ex |
| Zovala za Jekete | PVC, LSZH, kapenaNGAKHALE(Yosagwira mafuta/moto pa ntchito za khoma lalitali) |
| Kuyesa kwa Makina | Kukana kwambiri kukanda, -40°C mpaka +90°C |
Chifukwa Chake Chingwe cha Dingzun Chogwirira Ntchito Zamigodi:
- Kusintha kwakukulu— Kuwerengera ma pair, conductor gauge, shielding, ndi custom printing pa mine spec.
- Gulu la akatswiri aukadaulo— Chithandizo cha kuwerengera magawo a chinthu (Ca, La) kuti zitsimikizire kuti zikugwirizana ndi zotchinga.
- Kulankhulana mwachindunji ndi akatswiri— Ma quotes ofulumira, ma datasheet aukadaulo, ndi kutumiza padziko lonse lapansi.
Onetsetsani kuti mgodi wanu uli wotetezeka pogwiritsa ntchito chingwe chovomerezeka cha IS.[Lumikizanani ndi gulu lathu laukadaulo lero kuti mukambirane kapena kuti mupereke chitsanzo chanu].