I-Polyethylene (PE) isetyenziswa kakhulu kwi-ukufakelwa kwe-insulation kunye nokufakwa kwe-sheath yeentambo zombane kunye neentambo zonxibelelwanongenxa yamandla ayo abalaseleyo oomatshini, ukuqina, ukumelana nobushushu, ukugquma, kunye nokuzinza kweekhemikhali. Nangona kunjalo, ngenxa yeempawu zesakhiwo se-PE ngokwayo, ukumelana kwayo nokuqhekeka koxinzelelo lokusingqongileyo kuphantsi kakhulu. Le ngxaki iba nkulu ngakumbi xa i-PE isetyenziswa njenge-sheath yangaphandle yeentambo ezixhonyiweyo ezinkulu.
1. Indlela yokuqhekeka kwesingxobo se-PE
Ukuqhekeka kwe-PE sheath kwenzeka ikakhulu kwiimeko ezimbini:
a. Ukuqhekeka koxinzelelo lwendalo: Oku kubhekisa kwinto apho ishelufu iqhekeka ngokuqhekeka okubuthathaka ukusuka kumphezulu ngenxa yoxinzelelo oludibeneyo okanye ukuvezwa kwimidiya yendalo emva kokufakwa nokusebenza kwekhebula. Oku kubangelwa ikakhulu luxinzelelo lwangaphakathi ngaphakathi kweshelufu kunye nokuvezwa ixesha elide kulwelo oluyi-polar. Uphando olunzulu malunga nokuguqulwa kwezinto luye lwasombulula kakhulu olu hlobo lokuqhekeka.
b. Ukuqhekeka koxinzelelo lweMechanical: Oku kwenzeka ngenxa yokusilela kwesakhiwo kwintambo okanye iinkqubo ezingafanelekanga zokukhupha isheya, nto leyo ekhokelela ekuxinaniseni okukhulu koxinzelelo kunye nokuqhekeka okubangelwa kukuguqulwa ngexesha lokufakwa kwentambo. Olu hlobo lokuqhekeka lubonakala ngakumbi kwiisheya zangaphandle zeentambo zentsimbi ezinkulu ezine-tape armored.
2. Izizathu zokuqhekeka kwe-PE Sheath kunye neMilinganiselo yokuPhucula
2.1 Impembelelo yeCableIteyiphu yentsimbiUlwakhiwo
Kwiintambo ezineedayamitha ezinkulu zangaphandle, umaleko oxhonyiweyo uhlala wenziwe ngee-tape wrap zentsimbi eziphindwe kabini. Ngokuxhomekeke kububanzi bangaphandle bentambo, ubukhulu beteyipu yentsimbi buyahluka (0.2mm, 0.5mm, kunye ne-0.8mm). Iiteyipu zentsimbi ezixhonyiweyo ezinobukhulu zinobulukhuni obuphezulu kunye ne-plasticity ephantsi, nto leyo ebangela ukuba kubekho isithuba esikhulu phakathi kwee-layers eziphezulu nezisezantsi. Ngexesha lokukhupha, oku kubangela umahluko omkhulu kubukhulu be-sheath phakathi kwee-layers eziphezulu nezisezantsi zomphezulu we-layers ezixhonyiweyo. Iindawo ze-sheath ezincinci ezisemaphethelweni e-tape yentsimbi yangaphandle zifumana uxinzelelo olukhulu loxinzelelo kwaye zezona ndawo ziphambili apho kwenzeka khona ukuqhekeka kwixesha elizayo.
Ukunciphisa impembelelo yeteyiphu yentsimbi ekhuselweyo kwishelufu engaphandle, umaleko wokubopha onobukhulu obuthile uyasongwa okanye ukhutshwe phakathi kwetheyiphu yentsimbi kunye neshelufu ye-PE. Olu maleko wokubopha kufuneka lube lukhuni ngokulinganayo, ngaphandle kwemibimbi okanye ukuvela. Ukongezwa komaleko wokubopha kuphucula ukuguda phakathi kwamanqanaba amabini etheyiphu yentsimbi, kuqinisekisa ubukhulu beshelufu ye-PE efanayo, kwaye, xa idibene nokucutheka kweshelufu ye-PE, kunciphisa uxinzelelo lwangaphakathi.
I-ONEWORLD inika abasebenzisi ubukhulu obahlukeneyo beizixhobo ezixhotyisiweyo zeteyiphu yentsimbi egayiweyoukuhlangabezana neemfuno ezahlukeneyo.
2.2 Impembelelo yeNkqubo yoMveliso weeCable
Iingxaki eziphambili kwinkqubo yokukhupha iishelufu ezinkulu zekhebula ezixhonyiweyo zangaphandle kukupholisa okunganelanga, ukulungiswa okungafanelekanga kokubumba, kunye nomlinganiselo wokolula ogqithisileyo, okubangela uxinzelelo olugqithisileyo lwangaphakathi ngaphakathi kweshelufu. Iintambo ezinkulu, ngenxa yeeshelufu zazo ezibanzi nezinkulu, zihlala zijongene nemida kubude kunye nomthamo wemibhobho yamanzi kwimigca yokuvelisa i-extrusion. Ukupholisa ukusuka kuma-200 degrees Celsius ngexesha lokukhupha ukuya kubushushu begumbi kubangela imingeni. Ukupholisa okunganelanga kukhokelela kwishelufu ethambileyo kufutshane nomaleko we-armor, okubangela ukukrwela kumphezulu weshelufu xa intambo ibhityiwe, ekugqibeleni okubangela ukuqhekeka okunokwenzeka kunye nokuqhekeka ngexesha lokubeka intambo ngenxa yamandla angaphandle. Ngaphezu koko, ukupholisa okunganelanga kunegalelo ekwandeni kwamandla angaphakathi okuncipha emva kokujikeleza, okuphakamisa umngcipheko wokuqhekeka kweshelufu phantsi kwamandla amakhulu angaphandle. Ukuqinisekisa ukupholisa okwaneleyo, kuyacetyiswa ukwandisa ubude okanye umthamo wemibhobho yamanzi. Ukunciphisa isantya sokukhupha ngelixa kugcinwa iplastiki efanelekileyo yeshelufu kunye nokuvumela ixesha elaneleyo lokupholisa ngexesha lokujikeleza kubalulekile. Ukongeza, xa sicinga nge-polyethylene njenge-crystalline polymer, indlela yokupholisa ehlukanisiweyo, ukusuka kwi-70-75°C ukuya kwi-50-55°C, kwaye ekugqibeleni ukuya kubushushu begumbi, inceda ekunciphiseni uxinzelelo lwangaphakathi ngexesha lenkqubo yokupholisa.
2.3 Impembelelo ye-Coiling Radius kwi-Cable Coiling
Ngexesha lokubopha iintambo, abavelisi balandela imigangatho yoshishino yokukhetha iireyile zokuhambisa ezifanelekileyo. Nangona kunjalo, ukwamkela ubude obude bokuhambisa iintambo ezinkulu zangaphandle kudala imingeni ekukhetheni iireyile ezifanelekileyo. Ukuze kuhlangatyezwane nobude obuchaziweyo bokuhambisa, abanye abavelisi banciphisa ububanzi beebhereli zereyile, nto leyo ebangela ukuba ireyile ingagobi ngokwaneleyo kwintambo. Ukugoba okugqithisileyo kukhokelela ekufudukeni kweeleya zezixhobo, okubangela amandla amakhulu okucheba kwisheya. Kwiimeko ezinzima, iibherrs zestrip yentsimbi exhonyiweyo zinokugqobhoza umaleko wokucushion, zingene ngqo kwisheya zize zibangele imifantu okanye iimfanta ecaleni komphetho westrip yentsimbi. Ngexesha lokubeka iintambo, amandla okugoba kunye nokutsala ecaleni abangela ukuba isheya liqhekeke kwezi mfanta, ngakumbi kwiintambo ezikufutshane neeleya zangaphakathi zereya, nto leyo ebangela ukuba ziqhekeke lula.
2.4 Impembelelo yeNdawo yoKwakha nokufakela kwindawo
Ukuze ulwakhiwo lweentambo lube semgangathweni, kuyacetyiswa ukuba kuncitshiswe isantya sokubekwa kweentambo, kuthintelwe uxinzelelo olugqithisileyo olusecaleni, ukugoba, amandla okutsala, kunye nokungqubana komphezulu, kuqinisekiswa ukuba kukho indawo yokwakha ephucukileyo. Kungcono, ngaphambi kokufakwa kweentambo, vumela intambo iphumle kwi-50-60°C ukuze kukhululwe uxinzelelo lwangaphakathi kwi-sheath. Kuphephe ukuvezwa kweentambo ixesha elide elangeni ngqo, njengoko amaqondo obushushu ahlukeneyo kumacala ahlukeneyo entambo anokubangela uxinzelelo, okwandisa umngcipheko wokuqhekeka kwe-sheath ngexesha lokubekwa kweentambo.
Ixesha leposi: Disemba-18-2023