Zithini iimfuno zeentambo ezikhuselekileyo ngokwangaphakathi?
Ngaphakathi kweendawo zoshishino ezinobungozi apho igesi etshayo, umphunga kunye nothuli oluvuthayo zibeka umngcipheko wokuqhushumba rhoqo, iintambo ezikhuselekileyo (IS) zimele ulawulo lokhuseleko oluyilwe ngobuchule olubalulekileyo lwezixhobo ezisebenzisa amandla aphantsi, unxibelelwano kunye neesekethe zolawulo. Ngokungafaniyo neentambo eziqhelekileyo zesiqhelo, iintambo ezikhuselekileyo zenzelwe injongo yokunciphisa ukukhutshwa kwamandla ombane phantsi kweemeko eziqhelekileyo zokusebenza kunye neziphene, ukususa imithombo enokubakho yokutsha.
Injineli'Ingcaciso Engundoqo: IS Ukusilela Kweentambo Kuyathintelwa Kakhulu
Ngokweminyaka yam yamava njengonjineli wombane kunye neentambo esebenza kwiiprojekthi zegesi yeoyile, iikhemikhali kunye nezemigodi, ndikholelwa ngokuqinileyo ukuba ukusilela kweentambo ze-IS akusoloko kubangelwa ziziphene zezinto eziluhlaza. Endaweni yoko, zihlala zibangelwa kukukhethwa koyilo olungahambelaniyo, imida yeparameter yombane engahoywanga okanye ukufakwa okungafanelekanga kwindawo.
Ukuthobela ngokungqongqo iimfuno zobugcisa, ulwakhiwo, izinto kunye nokufakelwa ezisemgangathweni kwihlabathi liphela kubalulekile ukugcina ukhuseleko lwangaphakathi kuzo zonke izicelo zeoyile negesi, ukucutshungulwa kweekhemikhali, ukumbiwa kwemigodi kunye nolwandle. Eli nqaku liphonononga iimfuno eziyimfuneko ezilawula uyilo lwentambo olukhuselekileyo kunye neziqinisekiso, kunye namatyala eprojekthi yehlabathi lokwenyani kunye nokuqonda kobunjineli.
Imfuneko esisiseko: Ukuthobela iMigangatho yeHlabathi
Ngokwembono yobunjineli, imfuneko esisiseko yayo nayiphi na intambo ekhuselekileyo ngaphakathi kukuthobela imigangatho yolawulo kunye neyobuchwephesha eyaziwayo kwihlabathi liphela. Le migangatho imisela iikhrayitheriya ezifanayo zokuqinisekiswa koyilo, uvavanyo lokusebenza kunye nokuthotyelwa kwemithetho, ukuqinisekisa ukuba intambo inokusebenza ngokukhuselekileyo kwiindawo ezinobungozi.
Umlinganiselo wehlabathi jikelele weenkqubo ezikhuselekileyo ngokwangaphakathi, kuquka neentambo ezidibanisayo, ngulo I-IEC 60079‑25Ichaza iimfuno ezineenkcukacha zomthamo wekhebula, ukufakelwa kwamandla, ukukhethwa kwezinto kunye noyilo lwesakhiwo.
Ukuze kuthotyelwe imithetho yengingqi: Ukuthunyelwa kwabantu baseYurophu kufuna ukuthotyelwa I-ATEX 2014/34/EU umyalelo (wokuhlelwa kweendawo eziqhumayo); izicelo zaseMntla Melika kufuneka zihlangabezane I-UL 60079‑11 kunye ne-NFPA 70 NEC 504; IECEx Isiqinisekiso samkelwe ngokubanzi kwiiprojekthi eziwela imida.
Ityala Lokwenyani 1:
Ngaphambili besisebenzisana nomgodi wamalahle wase-Australia, kwaye iziphumo bezintle kakhulu. Sikwazile nokubamba i-70% yesabelo semarike.
Imfuneko Ephambili Yobuchwephesha: Ukulinganiselwa Kwamandla
Ukunciphisa amandla ngumgaqo-siseko wobugcisa ophambili oxhasa uyilo lwekhebula olukhuselekileyo ngokwangaphakathi. Amandla ombane agcinwe ngaphakathi kwekhebula kufuneka anganelanga ukukhanyisa umoya onobungozi ojikelezileyo—nokuba kukho i-short circuit okanye ukungasebenzi kakuhle kwecandelo.
Ukuze kufezekiswe oku, iinjineli kufuneka zilawule ngokungqongqo iiparameter ezimbini ezibalulekileyo zombane: umthamo kunye nokufakwa kwamandla ngobude beyunithi nganyeKwiindawo ezinobungozi zeQela le-IIC (umz., i-hydrogen, i-acetylene), imida yoyilo eqhelekileyo yile umthamo ≤ 200 pF/m kwaye ukutsalwa kwamandla ≤ 1 μH/mLa maxabiso afunyanwa kubalo lwamandla esekethe ukuqinisekisa ukuba amandla aphezulu akhutshwayo ngexesha lempazamo awadluli kwi-minimum ignition energy (MIE) yesixhobo esivuthayo esijoliswe kuso.
Ubungakanani be-conductor bukwalinganiselwe, kunye neendawo eziqhelekileyo ezinqamlezileyo eziqala kwi-0.5 mm² ukuya kwi-2.5 mm² kusetyenziswa ubhedu olufakwe kwi-tin. Olu lwakhiwo lulinganisela ukuhanjiswa kombane kunye nokuguquguquka koomatshini kunye nokunciphisa amandla, ngelixa i-tin plating inika ukumelana nokugqwala kwiindawo zoshishino ezinzima.
Itheyibhile yesishwankathelo seeMfuno eziphambili (uNjineli'Isalathiso Esisebenzayo)
| Udidi lweeMfuno | Iinkcukacha zoBunjineli obuPhambili | Izizathu zobugcisa kunye neMigangatho efanelekileyo |
|---|---|---|
| Ukuthotyelwa kweMithetho | Isiqinisekiso sehlabathi/sengingqi; ulungelelwaniso oluqhelekileyo | Iqinisekisa ukuhambelana kunye nokuqinisekiswa kokhuseleko; IEC 60079‑25, ATEX 2014/34/EU, UL 60079‑11, IECEx |
| Ukunqongophala kwamandla | Umthamo ≤ 200 pF/m; Ukuhanjiswa ≤ 1 μH/m (Iqela le-IIC); 0.5–2.5 mm² ii-conductors ze-copper ezifakwe kwi-tin ezixineneyo | Ithintela ukwakheka kwamandla angaphezulu kwe-MIE yeendaba eziyingozi; ithintela ukwakheka kwamandla kunye nokwakheka kwentlantsi |
| Uyilo lweZakhiwo | Ubushushu/isikhongozeli esithintela ilangatye; isikhongozeli sangaphandle esiluhlaza okwesibhakabhaka; ukhuselo lwe-electromagnetic | Izixhobo zePUR/LSZH zokumelana neekhemikhali/ioyile; ishedi eluhlaza okwesibhakabhaka yokubona; i-Al-foil kunye ne-copper braid efakwe ebhotileni (≥80% yokugubungela) ukunciphisa i-EMI kunye nokuphazamiseka kwesignali |
| Ukusebenza koomatshini kunye nobushushu | Ubushushu bokusebenza: -40°C ukuya ku-+70°C (umzuzu); ukumelana nokudinwa okunamandla; ukumelana nokukrala/nokugqwala | Iqinisekisa ukuqina kwiindawo zoshishino ezinzima; igcina ulwakhiwo luluqilima ngexesha lokuhamba kwezixhobo |
Iimfuno zeSakhiwo: Izinto ezisetyenzisiweyo kunye noYilo
Ngaphaya kweemfuno zombane namandla, izinto eziqwalaselwayo kuyilo lwesakhiwo zibalulekile ekugcineni ukhuseleko lwangaphakathi kwixesha lobomi benkonzo yentambo. Izinto zokukhusela kunye nesheya kufuneka zikhethwe ngenxa yokumelana kwazo neekhemikhali, ukubambezeleka komlilo kunye nokuqina koomatshini—iikhompawundi ze-polyurethane (PUR) kunye ne-low-smoke ze-zero-halogen (LSZH) zikhethwa kakhulu kwiindawo ezininzi zokusebenza kwemizi-mveliso.
Injineli'Isilumkiso: Don'Izinto ezingaphantsi kwexabiso lesheya
Ngokombono wam, abasebenzisi abaninzi bokugqibela bayayijongela phantsi indlela esebenza ngayo i-sheath. Iintambo zePVC eziqhelekileyo zikhawuleza ziqhekeke kwizityalo zeekhemikhali ezityebileyo kwioyile, ziphule i-insulation kwaye zibangele iingozi ezifihlakeleyo zokhuseleko. Ukukhetha i-insulation kunye ne-sheath kuchaphazela ngokuthe ngqo ubomi benkonzo ye-cable kunye nokhuseleko kwiindawo ezinzima.
Ukwahlulwahlulwa kweSikhuseli kunye neSekethe: Kuphephe i-EMI kunye nokuNgcoliswa okuNqamlezayo
Ukukhusela kunye nokwahlulwahlulwa kweesekethe zezinye zeemfuno zesakhiwo ekufuneka iinjineli zijongane nazo ukuthintela ukuphazamiseka kwe-electromagnetic (EMI) kunye nongcoliseko oluphakathi kweesekethe. Iintambo ezikhuselekileyo ngaphakathi ezingundoqo ezininzi zihlala ziquka ukhuseleko oluphindwe kabini (i-aluminium-polyester foil + i-copper braid ene-tin ephezulu) kunye nocingo olukhethekileyo lokukhupha amanzi ukuze kufakwe umhlaba.
Ngokwembono yam, ukungaqhubeki kakuhle kokukhusela kunye noqhagamshelo oluphukileyo lweentambo zokukhupha amanzi zezinye zezona zizathu zithathu eziphambili zokungazinzi kwesignali ye-IS kwizityalo ze-petrochemical. Okubalulekileyo kukuba, iisekethe ze-IS kufuneka zahlulwe ngokwasemzimbeni kwiintambo zamandla ezingakhuselekanga ngokwasemzimbeni, njengoko kuchaziwe kwi-IEC 60079-25, ukuze kuthintelwe ukudluliselwa kwamandla okunokuphazamisa ukhuseleko lwangaphakathi.
Ukusebenza koomatshini kunye nobushushu: Ukuqina kwiindawo ezifuna amandla
Iimfuneko zokusebenza koomatshini kunye nobushushu zenzelwe ukuqinisekisa ukuthembeka kwekhebula kwiimeko zokusebenza ezinzima. Iintambo ezikhuselekileyo ngaphakathi kufuneka zimelane nokugoba okuphindaphindiweyo, ukujija kunye nokukrala—okuqhelekileyo kwiinkqubo zerobhothi kunye nezixhobo ezihambayo. Uvavanyo lokudinwa olunamandla luyimfuneko ukuqinisekisa ukusebenza kwexesha elide.
Iimfuno zokugqibela: Isiqinisekiso, ukuMakisha kunye noFakelo
Isatifikethi, ukumakisha kunye neendlela zokufakela zizalisekisa iimfuno zobunjineli zeentambo ezikhuselekileyo ngokwangaphakathi. Zonke iintambo ze-IS kufuneka zibe neempawu ezicacileyo nezihlala zihleli ezibonisa imigangatho yokuthobela imithetho, ukulinganiswa kweqela legesi, udidi lobushushu kunye namaxabiso e-capacitance-inductance—ezi mpawu zivumela iinjineli ukuba ziqinisekise ukufaneleka kweentambo kwiindawo ezithile ezinobungozi.
Ukufakelwa kufuneka kulandele izikhokelo ezingqongqo: Iisekethe ze-IS mazijikeleziswe ngokwahlukileyo kwiintambo ezingezizo ze-IS, ii-cable glands eziqinisekisiweyo ezingenakuqhuma kunye neebhokisi ze-junction mazisetyenziswe ukugcina uphawu lwentambo olungenamlilo, kwaye kufuneka kwenziwe ubalo lwe-loop ukuqinisekisa ukuba i-total system capacitance/inductance (intambo + izixhobo) ayidluli kwimida ekhuselekileyo.
Injineli'Isifundo Sokugqibela: Ungaze Uyekelelane Ngokhuseleko Ngeendleko
Njengonjineli wombane osebenza ngobuchwephesha kwiinkqubo zeendawo ezinobungozi, kubalulekile ukugxininisa ukuba ukuthotyelwa kwezi mfuno akusiyonto nje yomthetho—luxanduva olusisiseko lobunjineli lokukhusela abasebenzi, izixhobo kunye nezibonelelo.
Ngokoluvo lwam, eyona nto ingaqondwa kakuhle kwishishini kukuphatha iintambo ezikhuselekileyo ngokwasemzimbeni njenge "iintambo zesignali eziqhelekileyo ezineejakethi eziluhlaza okwesibhakabhaka". Enyanisweni, yonke iparameter - ukusuka kwi-conductor stranding pitch, ubukhulu be-insulation ukuya kwi-shielding coverage - ibalwa ngokungqongqo ukuze kuncitshiswe amandla. Nokuba ukuphambuka okuncinci kunokuphazamisa yonke inkqubo yokhuseleko lwangaphakathi.
Iindlela Zexesha Elizayo: Iimfuno Eziguqukayo Zeendawo Ezisebenza Ngobuchule Kwezoshishino
Njengoko kwamkelwa izixhobo ezikrelekrele, ukuzilawula kwemizi-mveliso kunye nokubeka esweni okukude kwiindawo ezinobungozi, iimfuno zobunjineli zeentambo ezikhuselekileyo ngokwangaphakathi ziyaqhubeka nokukhula. Abavelisi baphuhlisa izisombululo zeentambo ze-IS eziguquguqukayo, ezishushu kakhulu kunye nezenzelwe wena ukuhlangabezana neemfuno zeenkqubo zanamhlanje zoshishino.
Kwiinjineli kunye namaqela okuthenga, ingcebiso yam ephambili yile: Ungaze uyekethise kwiiparameter ze-capacitance-inductance, ii-material grades kunye neziqinisekiso zomntu wesithathu zokunciphisa iindleko. Intambo enye engathobeliyo imithetho inokubangela iziphumo zokhuseleko ezingenakulungiseka kwisakhiwo sonke semizi-mveliso.
🏢Kutheni iDingzun Cable isetyenziselwa ukufakelwa kwendawo yakho enobungozi:
Ukulungele ukukhusela imeko yakho enobungozi?
Ngaba ufuna intambo ye-IS eqinisekisiweyo ukuze usebenzise izixhobo zakho ezinobungozi kwindawo yakho? [Nxibelelana neqela lethu lobuchwephesha namhlanje ukuze ufumane ingcebiso]