Amapayipi e-PEmanje sezimakethe, futhi seziwumkhiqizo ojwayeleke kakhulu, ikakhulukazi lawo asembonini.Uma kukhulunywa ngamapayipi e-PE, ngokushesha acabanga ukumelana nokugqoka, ukumelana nokucindezela, ukumelana nokugqwala kanye nempilo ende yenkonzo.Maningi amapayipi e-PE.Izinhlobo, izinto zokusetshenziswa ze-PE nazo zihlukaniswe ngezinhlobo eziningi, imikhiqizo yepayipi ye-PE ekhiqiziwe nayo ihlukaniswe yaba izinhlobo eziningi, incazelo yanamuhla enemininingwane eminingi, uyini umehluko phakathi kwamazinga wepayipi le-PE80 nepayipi le-PE100?
I-PE impahla yi-polyethylene, okuyizinto ezihlukahlukene zepulasitiki.Kuyinto ye-polymer eyenziwe nge-polyethylene.
Ngokuyisisekelo ihlukaniswe yaba izigaba ezimbili: low density polyethylene LDPE (amandla aphansi);high density polyethylene HDPE.Izinto ze-PE zihlukaniswe ngamabanga amahlanu ngokwezinga elihlanganisiwe lamazwe ngamazwe: ibanga le-PE32, ibanga le-PE40, ibanga le-PE63, ibanga le-PE80 kanye nebanga le-PE100.
Ukukhiqizwa kwamapayipi e-PE amapayipi okuhambisa amanzi kuyi-polyethylene ephezulu-density (HDPE), futhi amabanga ayo yi-PE80 ne-PE100 (ngokwesifinyezo se-Minimum Required Strength, MRS).I-MRS ye-PE80 ifinyelela ku-8MPa;I-MRS ye-PE100 ifinyelela ku-10MPa.I-MRS ibhekisela emandleni e-hoop tensile stress of the pipe (inani elibaliwe lihlolwe ngokwezindinganiso zamazwe ngamazwe).
I-PE80 (8.00～9.99Mpa) iyi-masterbatch enokuqukethwe kwe-antimony trioxide okungu-80% ku-polyethylene substrate, engasetshenziswa kakhulu ekulingiseni nasekwenzeni ifilimu ngesikhathi esifanayo.I-masterbatch egeleza mahhala egeleza kancane engenathuli futhi ephephile ekukhiqizweni kunezimpushana zendabuko, kulula ukuyiqonda umthamo, futhi ibhekwa njenge-masterbatch yenhloso evamile, egeleza mahhala ngefomu eliyimbudumbudu.
I-PE100 (10.00～11.19Mpa) iyinani lamabanga atholwe ngokusondeza ubuncane bamandla adingekayo (MRS) wezinto zokusetshenziswa ze-polyethylene.Ngokuya nge-GB/T18252, amandla e-hydrostatic wento ehambelana no-20℃, iminyaka engu-50 kanye namathuba abikezelwe angu-97.5% anqunywa ngokuvumelana ne-GB/T18252.σLPL, guqula i-MRS, bese uphindaphinda i-MRS ngo-10 ukuze uthole inombolo yokuhlukanisa yezinto.
Uma amapayipi nokufakwa okukhiqizwa kusuka kumabanga ahlukene wezinto zokusetshenziswa ze-polyethylene kufanele kuxhunywe, amalunga kufanele ahlolwe nge-hydraulic.Ngokuvamile, izingxube ze-PE63, PE80, PE100 ezinezinga lokuncibilika kokuncibilika (MFR) (190°C/5kg) phakathi kuka-0.2g/10min kanye no-1.3g/10min kufanele zibhekwe njengezixubene futhi zingaxhunywa komunye nomunye.Izinto zokusetshenziswa ezingaphandle kwalolu bubanzi zidinga ukuhlolwa ukuze kunqunywe.
1. Liyini ipayipi le-polyethylene le-PE100?
Ukuthuthukiswa kwezinto zamapayipi e-polyethylene kubonakala njengokuhlukaniswa kwezizukulwane ezintathu, okuyizigaba ezintathu zokuthuthukiswa:
Isizukulwane sokuqala, i-polyethylene ephansi futhi "uhlobo lokuqala" lwe-polyethylene ephezulu, inokusebenza okungalungile futhi ilingana nezinto zamanje zepayipi le-polyethylene ngaphansi kwe-PE63.
Isizukulwane sesibili, esavela ngeminyaka yawo-1960s, siyipayipi le-polyethylene elinobukhulu obuphakathi namandla esikhathi eside we-hydrostatic kanye nokumelana nokuqhekeka, manje osekubizwa nge-PE80 grade polyethylene pipe material.
Isizukulwane sesithathu, esavela ngawo-1980, sibizwa ngokuthi ipayipi le-polyethylene yesizukulwane sesithathu impahla ekhethekile PE100.I-PE100 isho ukuthi ku-20°C, ipayipi le-polyethylene lisengakwazi ukugcina amandla amancane adingekayo we-MRS we-10MPa ngemva kweminyaka engu-50, futhi linokumelana okuhle kakhulu ekukhuleni okusheshayo kokuqhekeka.
2. Yiziphi izinzuzo eziyinhloko zepayipi le-PE100 polyethylene?
I-PE100 inazo zonke izakhiwo ezinhle kakhulu ze-polyethylene, futhi izakhiwo zayo zemishini zithuthukisiwe kakhulu, okwenza i-PE100 ibe nezinzuzo eziningi ezikhethekile futhi isetshenziswa emikhakheni eminingi.
2.1 Ukumelana nokucindezela okuqinile
Ngenxa yokuthi i-PE100 resin inamandla amancane adingekayo we-10MPa, inamandla kakhulu kunamanye ama-polyethylenes, futhi igesi noketshezi kungathuthwa ngaphansi kwengcindezi ephezulu;
2.2 Udonga oluncane
Ngaphansi kwengcindezi evamile yokusebenza, udonga lwamapayipi owenziwe ngezinto ze-PE100 lungancishiswa kakhulu.Emapayipi amanzi anobubanzi obukhulu, ukusetshenziswa kwamapayipi anezindonga ezincane kungasindisa izinto futhi kwandise indawo yendawo ephambanayo yamapayipi, ngaleyo ndlela kwandise amandla okuthutha amapayipi.Uma umthamo wokudlulisa uhlala njalo, ukwanda kwesigaba esiphambanayo kuholela ekwehleni kwezinga lokugeleza, ukuze ukudlulisa kubonakale ngepompo elincane lamandla, kodwa izindleko zigcinwa.
2.3 Isici sokuphepha esiphezulu
Uma ipayipi linosayizi noma ukucindezela kokusebenza kucacisiwe, isici sokuphepha esingaqinisekisa i-PE100 siqinisekisiwe ochungechungeni lwamapayipi e-polyethylene ahlukahlukene.
2.4 Ubulukhuni obuphakeme
Impahla ye-PE100 ine-elastic modulus engu-1250MPa, ephakeme kune-950MPa ye-HDPE resin evamile, eyenza ipayipi le-PE100 libe nokuqina kwendandatho ephakeme.
3. Izakhiwo zemishini ye-PE100 resin
3.1 Amandla Ahlala Njalo
Amandla okubekezela anqunywa ukuhlolwa kokucindezela imigqa emazingeni okushisa ahlukene (20°C, 40°C, 60°C no-80°C).Ku-20℃, i-PE100 resin ingagcina amandla angu-10MPa ngemva kweminyaka engama-50, (PE80 yi-8.0MPa).
3.2 Ukumelana okuhle nokuqhekeka kwengcindezi
Izinto ezikhethekile zepayipi le-polyethylene le-PE100 linokumelana okuhle nokuqhekeka kwengcindezi, libambezela ukwenzeka kokuqhekeka kwengcindezi (> amahora ayi-10000), futhi lingabambezeleka iminyaka engaphezu kweyi-100 ngaphansi kwesimo esingu-20 ℃.
3.3 Ukumelana okuphawulekayo nokukhula kwe-crack ngokushesha
Imfuneko yekhono lokumelana nokukhula okusheshayo kwemifantu ikhawulela ukusetshenziswa kwamapayipi endabuko e-polyethylene: ngegesi, umkhawulo wengcindezi ngu-0.4MPa, futhi ukulethwa kwamanzi, yi-1.0MPa.Ngenxa yekhono elimangalisayo le-PE100 lokumelana nokukhula okusheshayo kwemifantu, umkhawulo wokucindezela kunethiwekhi yegesi yemvelo ukhuphuka ube ngu-1.0MPa (i-1.2MPa isetshenziswe eRussia kanye ne-1.6MPa kunethiwekhi yokudlulisa amanzi).Ngamafuphi, ukusetshenziswa kwe-PE100 polyethylene impahla kumapayipi kuzoqinisekisa ukuthi imingcele yokusebenza yamapayipi okuhambisa amanzi e-pe100 kunethiwekhi yamapayipi iphephile, iyonga kakhulu futhi ibe nempilo ende yesevisi.
Inkomba: http://www.chinapipe.net/baike/knowledge/15022.html
Isikhathi sokuthumela: Nov-04-2022
