Iintlobo zeSheath eziqhelekileyo zeeCables zeOptical kunye nokusebenza kwazo

Ukuqinisekisa ukuba i-optical cable core ikhuselekile kumonakalo obangelwa ziimatshini, ubushushu, iikhemikhali kunye nokufuma, kufuneka ixhotyiswe nge-sheath okanye nezinye iileya zangaphandle. La manyathelo andisa ubomi benkonzo yee-optical fibers.

Iisheath ezisetyenziswa kakhulu kwiintambo ze-optical ziquka ii-A-sheaths (iisheaths ezibotshelelweyo ze-aluminium-polyethylene), ii-S-sheaths (iisheaths ezibotshelelweyo zentsimbi-polyethylene), kunye neesheaths ze-polyethylene. Kwiintambo ze-optical zamanzi anzulu, iisheaths ezitywiniweyo zesinyithi zihlala zisetyenziswa.

Iishelufu zePolyethylene zenziwe ngoxinano oluphantsi, oluphakathi, okanyeizinto ze-polyethylene emnyama ezinoxinano oluphezulu, ngokuvumelana nomgangatho we-GB/T15065. Umphezulu weshelufu ye-polyethylene emnyama kufuneka uthambe kwaye ufane, ungabi namaqamza abonakalayo, imingxunya ye-pin, okanye imifantu. Xa isetyenziswa njengeshelufu engaphandle, ubukhulu obuqhelekileyo kufuneka bube yi-2.0 mm, kunye nobukhulu obuncinci be-1.6 mm, kwaye ubukhulu obuqhelekileyo kuyo nayiphi na indawo enqamlezileyo akufuneki bube ngaphantsi kwe-1.8 mm. Iimpawu zoomatshini kunye nezomzimba zeshelufu kufuneka zihlangabezane neemfuno ezichazwe kwi-YD/T907-1997, Itheyibhile 4.

I-A-sheath inomaleko wokuthintela ukufuma owenziwe ngokugqunywa okude nokugqunywaiteyiphu ye-aluminium egqunywe ngeplastiki, idityaniswe neshelufu yepolyethylene emnyama ekhutshiweyo. Ishelufu yepolyethylene ibophana neteyipu edityanisiweyo kunye nemiphetho edityanisiweyo yeteyipu, enokomelezwa ngakumbi ngeglue ukuba kuyimfuneko. Ububanzi obudityanisiweyo beteyipu edityanisiweyo akufuneki bube ngaphantsi kwe-6 mm, okanye kwii-cable cores ezinobubanzi obungaphantsi kwe-9.5 mm, akufuneki bube ngaphantsi kwe-20% yomjikelezo wesiseko. Ubukhulu obuqhelekileyo beshelufu yepolyethylene yi-1.8 mm, kunye nobukhulu obuncinci be-1.5 mm, kunye nobukhulu obuphakathi obungaphantsi kwe-1.6 mm. Kwiileya zangaphandle zeType 53, ubukhulu obuqhelekileyo yi-1.0 mm, ubukhulu obuncinci yi-0.8 mm, kwaye ubukhulu obuphakathi yi-0.9 mm. Iteyipu edityanisiweyo ye-aluminium-plastiki kufuneka ihlangabezane nomgangatho we-YD/T723.2, kunye neteyipu ye-aluminium enobukhulu obuqhelekileyo be-0.20 mm okanye 0.15 mm (ubuncinci be-0.14 mm) kunye nobukhulu befilimu edityanisiweyo be-0.05 mm.

Kuvumelekile ukudibanisa iitheyiphu ezimbalwa ezidityanisiweyo ngexesha lokwenziwa kweentambo, ukuba nje isithuba sedityanisiwe singaphantsi kwe-350 m. Ezi zidityanisiweyo maziqinisekise ukuqhubeka kombane kwaye zibuyisele umaleko weplastiki odityanisiweyo. Amandla kwidityanisiweyo akufuneki abe ngaphantsi kwe-80% yamandla etheyiphu yokuqala.

I-S-sheath isebenzisa umaleko wokuthintela ukufuma owenziwe nge-corrugated egoqwe ngobude kwaye igqunywe ngaphezuluiteyiphu yesinyithi egqunywe ngeplastiki, idityaniswe neshelufu yepolyethylene emnyama ekhutshiweyo. Ishelufu yepolyethylene ibophana neteyipu edityanisiweyo kunye nemiphetho edityanisiweyo yeteyipu, enokomelezwa ngeglue ukuba kuyimfuneko. Iteyipu edityanisiweyo ehlanganisiweyo kufuneka yenze isakhiwo esifana nesangqa emva kokusonga. Ububanzi bokudityanisiweyo akufuneki bube ngaphantsi kwe-6 mm, okanye kwii-cable cores ezinobubanzi obungaphantsi kwe-9.5 mm, akufuneki bube ngaphantsi kwe-20% yomjikelezo wesiseko. Ubukhulu obuqhelekileyo beshelufu yepolyethylene yi-1.8 mm, kunye nobukhulu obuncinci be-1.5 mm, kunye nobukhulu obuphakathi obungaphantsi kwe-1.6 mm. Iteyipu edityanisiweyo yentsimbi-plastiki kufuneka ihlangabezane nomgangatho we-YD/T723.3, kunye neteyipu yentsimbi enobukhulu obuncinci be-0.15 mm (ubuncinci be-0.13 mm) kunye nobukhulu befilimu edityanisiweyo be-0.05 mm.

Izihlanganisi zeteyiphu ezidityanisiweyo ziyavunyelwa ngexesha lokwenziwa kweentambo, apho isithuba esincinci seentambo singama-350 m. Iteyiphu yentsimbi kufuneka idityaniswe ngempundu, ukuqinisekisa ukuqhubeka kombane kunye nokubuyisela umaleko odityanisiweyo. Amandla kwi-joint akufuneki abe ngaphantsi kwama-80% amandla e-composite tape yokuqala.

Iteyiphu ye-aluminiyam, iteyiphu yentsimbi, kunye neeleya zentsimbi ezisetyenziselwa imiqobo yokufuma kufuneka zigcine umbane uqhubeka kubude bentambo. Kwiisheya ezidityanisiweyo (kuquka iileya zangaphandle ze-Type 53), amandla okuxobuka phakathi kweteyiphu ye-aluminiyam okanye yentsimbi kunye nesheya ye-polyethylene, kunye namandla okuxobuka phakathi kwemiphetho egqumayo yeteyiphu ye-aluminiyam okanye yentsimbi, akufuneki zibe ngaphantsi kwe-1.4 N/mm. Nangona kunjalo, xa kusetyenziswa into yokuthintela amanzi okanye i-coating phantsi kweteyiphu ye-aluminiyam okanye yentsimbi, amandla okuxobuka kwimiphetho egqumayo awafuneki.

Olu lwakhiwo lupheleleyo lokhuseleko luqinisekisa ukuqina nokuthembeka kweentambo ze-optical kwiindawo ezahlukeneyo, nto leyo ehlangabezana ngempumelelo neemfuno zeenkqubo zonxibelelwano zanamhlanje.