isicelo

Ipayipi likathayela eliphindwe kabili liwuhlobo olusha lwepayipi, elinesisindo esincane, amandla aphezulu, ukwakhiwa okulula, ukonga impahla kanye nezinye izinzuzo.Uma kuqhathaniswa namandla afanayo we-tube yodonga olukhanyayo, ingasindisa cishe u-40% wezinto ezingavuthiwe, ezisetshenziswa kabanzi ekuxhumaneni kwe-cable optical sheath, i-drainage yokwakha, i-drainage kamasipala, indawo yasepulazini yokuchelela okuphansi kwengcindezi kanye neminye imikhakha.Eminyakeni yamuva, ukusetshenziswa kwe-double-wall bellows kancane kancane kwandiswa, emkhakheni we-cable casing casing, ngokuyisisekelo kuthathe indawo yepayipi likasimende.Uma kuqhathaniswa namanye amapayipi epulasitiki, ukusetshenziswa kwawo nakho kukhulu kakhulu.Emkhakheni wokwakhiwa kwe-drainage, ngenxa yokusebenza kwayo komsindo we-insulation kancane kancane, ngesikhathi esifanayo, ukuthuthukiswa kokufakwa kwamapayipi akwanele, ngakho-ke inani aliningi kakhulu.Nokho, ku amanzi kamasipala kanye nefekthri, ikakhulukazi ukusetshenziswa ububanzi enkulu wangcwatshwa double odongeni Bellows kuyanda.Ukusetshenziswa kwepayipi likathayela oluphindwe kabili uma kuqhathaniswa nokucaciswa okufanayo kwezindleko zepayipi lokukhanya kwepulasitiki kuphansi, umjikelezo wokwakha ungafushaniswa izikhathi ezi-5 ~ 10.

I-China yaqala ukwethula ukukhiqizwa kwalolu hlobo lwepayipi kusukela ekuqaleni kwawo-1990, ekuqaleni ikakhulukazi uchungechunge oluncane lobubanzi obungu-φ 110 noma ngaphansi, impahla eluhlaza ngokuyinhloko i-PVC, esetshenziswa kakhulu njengekhebula lekhebula lokuxhumana.Eminyakeni yamuva nje, izimbongolo ezinodonga oluphindwe kabili zikhula kancane kancane ziye ohlangothini lwe-diameter enkulu.Njengamanje, izimbongolo ezifuywayo ezinkulu kunazo zonke zingaba ngu-φ 1200. Izinto ezisetshenziswayo ezisetshenziswayo nazo zithuthukiswa ukusuka OKUQALA I-PVC kuya ku-PE, PP nokunye.Imishini yokukhiqiza iBellows nayo ikhule kusukela ekuqaleni.Njengamanje, izimboni eziningi zemishini yasekhaya zingakhiqiza umugqa wokukhiqiza we-bellows ububanzi obufika ku-1200mm.

Kunezinhlobo ezintathu ze-thermoplastics ezisetshenziswa kumapayipi amanzi agqitshiwe: i-POLYvinyl chloride, i-polyethylene ne-polypropylene.I-elastic modulus E yezinto ezintathu (ngokusho kwe-PREN13476-1) ithi:

Ngokusobala, i-POLYvinyl chloride iphakeme kakhulu, ilandelwa i-polypropylene kanye ne-polyethylene ephansi kakhulu.Ngenxa yokuthi i-elastic modulus E ye-POLYvinyl chloride inkulu kune-polyolefin, ukuqina kwendandatho efanayo kungafinyelelwa ngomzuzwana omncane we-inertia I. Uma usebenzisa i-wave design efanayo ungasebenzisa ukujiya okuncane kodonga.Ebangeni elithile le-PVC eliphindwe kabili - ukuvuthela kodonga kunzuzo yezomnotho, ngakho-ke emkhakheni wepayipi lokudonsa amanzi eligqitshiwe i-PVC kabili - ukubhodla kodonga ekusetshenzisweni kokuqala nakho kuyinani elikhulu kunawo wonke.Eminyakeni yamuva nje, i-polyolefin enezindonga eziphindwe kabili ithuthuke ngokushesha, ngenxa yezizathu ezilandelayo:

I-fluidity kanye nokuzinza okushisayo kwezinto ze-PVC kumpofu kakhulu, ngakho-ke kunzima ukukhiqiza ipayipi elikhulu lodonga lwesakhiwo.(Okwamanje, ububanzi obujwayelekile be-PVC-double-wall bellows ezimakethe zangaphandle bungaphansi kuka-500mm. Esingenisweni solwazi, umkhiqizi oyedwa kuphela otholakala ekhiqiza ububanzi obuyi-1000mm.) Izinto ezisetshenziswayo ze-Polyolefin zingakhiqiza imihubhe enezindonga ezimbili ezinkulu. ububanzi (kubikwe ukuthi kufika ku-1800 mm).

Ngoba alukho ulwazi lobuchwepheshe kulokhu lapho ukuthuthukiswa kwasekhaya kombhobho ogqitshiwe kuqala, ngokuyisisekelo kuncike ebhizinisini ukuthi liphumputhe ukuze kuphambuke okuthile.

Isibonelo, ukukhiqizwa kokuqala kwe-polyethylene-double-wall bellows kusetshenziswe i-PE80 high density polyethylene material efanelekayo amapayipi egesi.Lokhu kwaziswa ukuze kuqinisekiswe ukuguquguquka kwepayipi legesi, isisindo samangqamuzana siphansi kakhulu, i-modulus elastic iphansi kakhulu (ngezansi kwe-800Mpa), esetshenziselwa ukukhiqizwa kwezintambo eziphindwe kabili ngokuvamile ayikwazi ukufinyelela ukuqina kwendandatho edingekayo, ukwandisa ukushuba odongeni, ngokusobala hhayi kwezomnotho.Ngo-2003, inkampani ye-sinopec yanhua yahola ekuthuthukiseni i-6360M high density polyethylene HDPE odongeni oluphindwe kabili lwamapayipi othayela ukuze kugqitshwe amanzi e-China ngokuvumelana nezidingo zabasebenzisi, idonsa ulwazi lwentuthuko yangaphandle iminyaka eminingi futhi ngokuvumelana nezidingo zomhlaba wonke. amazinga athuthukile.Inqubo ye-polymerization engu-6360M isebenzisa ubuchwepheshe bokukhiqiza obuphakeme obuphindwe kabili, ukuze into ekhethekile ibe nesakhiwo esikhethekile se-molecular chain, i-modulus ephezulu yokunwebeka futhi ngesikhathi esifanayo ukuqinisekisa ukumelana okuhle kakhulu kokuqhekeka, ukumelana nomthelela nezinye izakhiwo.Ngemva kwalokho, i-Yanhua yathuthukisa izinto ezikhethekile ezingu-7000 zepayipi lokudonsa amanzi elingcwatshiwe elifanele i-polyethylene ephindwe kabili yodonga.

I-QHE16A/B, inhlaka ekhethekile yezivunguvungu ezinkulu ze-HDPE ezinodonga oluphindwe kabili eyakhiwe ngokuhlanganyela yi-Qilu Petrochemical Research Institute kanye nefekthri yepulasitiki, iye yaqashelwa abakhiqizi abaningi bensimbi emikhulu futhi isibe ngeyokuqala nenempumelelo enkulu ye-HDPE. i-double wall bellows resin ekhethekile eyenziwe e-China.Le nto ebalulekile yamukela ifomula entsha ye-catalyst yohlobo lwe-S, inohlelo lobuchwepheshe oluphelele, futhi inamandla aphezulu okuncibilika, i-modulus egobayo nokuzinza kokushisa.Ipayipi likathayela elinezinga elikhulu eliphindwe kabili elikhiqizwe ngale nto ekhethekile linokuqhuma okuhle, ukuqina kwendandatho nokusebenza okulwa nokuguga, okuqhathaniseka nokusebenza okuphelele kwezinto ezingenisiwe, futhi lingahlangabezana nezidingo zokukhiqiza zodonga oluphindwe kabili lwezinga elikhulu. ipayipi likathayela lemigqa ehlukene yokukhiqiza yasekhaya.