I-polyethylene (PE) isetshenziswa kabanzi emboniniukwahlukanisa kanye nokushehekwa kwezintambo zikagesi nezintambo zokuxhumana ngocingongenxa yamandla ayo okusebenza kahle kakhulu, ukuqina, ukumelana nokushisa, ukwahlukanisa, nokuzinza kwamakhemikhali. Kodwa-ke, ngenxa yezici zesakhiwo se-PE ngokwayo, ukumelana kwayo nokuqhekeka kwengcindezi yemvelo kubi kakhulu. Lolu daba lugqama kakhulu lapho i-PE isetshenziswa njengeshede yangaphandle yamakhebuli anengxenye enkulu yezikhali.
1. Indlela Yokuqhekeka Kwe-PE Sheath
Ukuqhekeka kwe-PE sheath ikakhulukazi kwenzeka ezimweni ezimbili:
a. I-Environmental Stress Cracking: Lokhu kubhekisela kwinto lapho umgodla uqhekeka khona ngaphandle ngenxa yengcindezi ehlangene noma ukuchayeka emithonjeni yezemvelo ngemva kokufakwa nokusebenza kwekhebula. Ibangelwa kakhulu ingcindezi yangaphakathi emgodleni kanye nokuchayeka isikhathi eside oketshezini olushisayo. Ucwaningo olunzulu lokuguqulwa kwezinto luxazulule lolu hlobo lokuqhekeka.
b. I-Mechanical Stress Cracking: Lokhu kwenzeka ngenxa yokushoda kwesakhiwo kukhebula noma ezinqubweni ze-sheath extrusion ezingafanele, okuholela ekugxiliseni okukhulu kwengcindezi kanye nokuqhekeka okudalwe ukuwohloka ngesikhathi sokufakwa kwekhebula. Lolu hlobo lokuqhekeka lugqama kakhulu emigodleni yangaphandle yezintambo zensimbi ezinengxenye enkulu ye-armored.
2. Izimbangela Zokuqhekeka Kwe-PE Sheath kanye Nezinyathelo Zokuthuthukisa
2.1 Umthelela WekhebulaItheyiphu yensimbiIsakhiwo
Ezintamboni ezinobubanzi obukhudlwana bangaphandle, isendlalelo se-armored ngokuvamile sakhiwe ngokusonga kwe-tape yensimbi enezingqimba ezimbili. Kuye ngobubanzi bangaphandle bekhebula, ukujiya kwetheyiphu yensimbi kuyahlukahluka (0.2mm, 0.5mm, kanye no-0.8mm). Amateyipu ensimbi aqinile anokuqina okuphakeme kanye nepulasitiki empofu, okuholela esikhaleni esikhulu phakathi kwezingqimba ezingaphezulu nezingaphansi. Phakathi ne-extrusion, lokhu kubangela umehluko omkhulu ekugqineni kwe-sheath phakathi kwezingqimba ezingaphezulu neziphansi ze-armored layer's surface. Izindawo zesheath ezacile emaphethelweni etheyiphu yensimbi yangaphandle zinengcindezi enkulu futhi ziyizindawo eziyinhloko lapho ukuqhekeka okuzayo kwenzeka khona.
Ukuze unciphise umthelela wetheyiphu yensimbi evikelekile kumgodla wangaphandle, isendlalelo sebhafa sogqinsi oluthile luyagoqwa noma lukhishwe phakathi kwetheyiphu yensimbi nomgodla we-PE. Lesi singqimba sebhafa kufanele sibe minyene ngokulinganayo, ngaphandle kwemibimbi noma ama-protrusions. Ukwengezwa kwesendlalelo se-buffering kuthuthukisa ukushelela phakathi kwezingqimba ezimbili ze-tape yensimbi, kuqinisekisa ukujiya kwe-PE sheath, futhi, kuhlanganiswe nokufinyela kwe-PE sheath, kunciphisa ukucindezeleka kwangaphakathi.
ONEWORLD inikeza abasebenzisi ubukhulu obuhlukahlukene beinsimbi yashukumisa itheyiphu impahla armoredukuhlangabezana nezidingo ezahlukene.
2.2 Umthelela Wenqubo Yokukhiqiza Ikhebula
Izinkinga eziyinhloko ngenqubo yokukhishwa kwamashethi ekhebula ensimbi eyisiyingi esikhulu sangaphandle ukupholisa okunganele, ukulungiswa kwesikhunta okungafanele, nesilinganiso eseqile sokunwebeka, okuholela ekucindezelekeni okukhulu kwangaphakathi ngaphakathi kweshethi. Izintambo ezinosayizi omkhulu, ngenxa yokuqina kwazo futhi ezibanzi, zivame ukubhekana nemikhawulo ngobude kanye nevolumu yemisele yamanzi emigqeni yokukhiqiza i-extrusion. Ukupholisa phansi kusuka kuma-degrees Celsius angaphezu kuka-200 ngesikhathi sokukhipha kuya kuzinga lokushisa lasekamelweni kubangela izinselele. Ukupholisa okunganele kuholela emgodleni othambile eduze kongqimba lwezivikelo, okubangela ukunwaya endaweni yomgodla lapho intambo iboshiwe, ekugcineni kubangele imifantu okungenzeka ibe khona kanye nokuphuka ngesikhathi sokubekwa kwekhebula ngenxa yamandla angaphandle. Ngaphezu kwalokho, ukupholisa okunganele kunomthelela ekwandiseni amandla angaphakathi okushwabana ngemva kokugoqa, okuphakamisa ingozi yokuqhekeka kwe-sheath ngaphansi kwamandla amakhulu angaphandle. Ukuqinisekisa ukupholisa okwanele, kunconywa ukwandisa ubude noma umthamo wemisele yamanzi. Ukwehlisa isivinini se-extrusion ngenkathi kugcinwa i-plasticization ye-sheath efanele kanye nokuvumela isikhathi esanele sokupholisa ngesikhathi sokugoqa kubalulekile. Ukwengeza, ukucabangela i-polyethylene njenge-polymer e-crystalline, indlela yokupholisa yokunciphisa izinga lokushisa ehlukene, kusukela ku-70-75 ° C kuya ku-50-55 ° C, futhi ekugcineni kuya ekamelweni lokushisa, kusiza ukunciphisa ukucindezeleka kwangaphakathi phakathi nenqubo yokupholisa.
2.3 Umthelela we-Coiling Radius ku-Cable Coiling
Ngesikhathi sokukhonkwana kwekhebula, abakhiqizi banamathela ezindinganisweni zemboni zokukhetha amareli okulethwa afanelekile. Kodwa-ke, ukwamukela ubude obude bokulethwa kwezintambo ezinkulu zobubanzi bangaphandle kubangela izinselele ekukhetheni ama-reel afanelekile. Ukuze kuhlangatshezwane nobude obucacisiwe bokulethwa, abanye abakhiqizi banciphisa ububanzi bemiphongolo ye-reel, okuholela ekungeneni kwerediya yokugoba yekhebuli. Ukugoba ngokweqile kuholela ekugudlukeni kwezendlalelo zezikhali, okubangela amandla amakhulu okugunda emgodleni. Ezimeni ezibucayi, ama-burrs we-armored steel strip angabhoboza isendlalelo sokumisa, ashumeke ngokuqondile emgodleni futhi abangele ukuqhekeka noma ukuqhekeka onqenqemeni lomucu wensimbi. Phakathi nokubeka ikhebula, amandla okugoba asemaceleni kanye nokudonsa abangela ukuba umgodla uqhekeke eduze kwalezi zimfa, ikakhulukazi izintambo eziseduze nezingqimba zangaphakathi zereli, okuwenza athambekele kakhulu ekuqhekekeni.
2.4 Umthelela Wendawo Yokwakha Neyokufaka Esizeni
Ukuze ulinganise ukwakhiwa kwekhebula, kuyalulekwa ukuba kuncishiswe isivinini sokubeka ikhebula, kugwenywe ukucindezela okukhulu kwe-lateral, ukugoba, amandla okudonsa, nokushayisana komhlaba, ukuqinisekisa indawo yokwakha ephucuzekile. Okungcono, ngaphambi kokufaka ikhebula, vumela ikhebula ukuthi liphumule ku-50-60 ° C ukuze ukhulule ukucindezeleka kwangaphakathi emgodleni. Gwema ukuchayeka isikhathi eside kwezintambo ekukhanyeni kwelanga, njengoba amazinga okushisa ahlukene ezinhlangothini ezihlukahlukene zekhebula angase aholele ekugxiliseni kokucindezeleka, okwandisa ingozi yokuqhekeka kwe-sheath ngesikhathi sokubeka ikhebula.
Isikhathi sokuthumela: Dec-18-2023