isicelo

Umbhobho owenziwe kabini wodonga luhlobo olutsha lombhobho, onobunzima obulula, amandla aphezulu, ulwakhiwo olufanelekileyo, ukugcinwa kwezinto kunye nezinye iingenelo.Xa kuthelekiswa namandla afanayo ombhobho eludongeni olukhanyayo, inokugcina malunga ne-40% yezinto ezikrwada, ezisetyenziswa ngokubanzi kunxibelelwano lwe-cable sheath, i-drainage yokwakha, i-drainage kamasipala, ukunkcenkceshela okuphantsi koxinzelelo kunye namanye amasimi.Kwiminyaka yakutshanje, ukusetyenziswa kodonga oluphindwe kabini kwandiswa ngokuthe ngcembe, kwintsimi ye-cable cable casing, ngokusisiseko kuthathe indawo yombhobho wesamente.Xa kuthelekiswa neminye imibhobho yeplastiki, ukusetyenziswa kwayo kukwayeyona inkulu.Kwintsimi yokwakhiwa kwe-drainage, ngenxa yokusebenza kwayo kwesandi sokufakelwa kwesandi kuncinci, kwangaxeshanye, ukuphuhliswa kwezixhobo zombhobho akwanelanga, ngoko ke inani alikho kakhulu.Nangona kunjalo, kumasipala nakwimizi-mveliso yokuhambisa amanzi, ngakumbi ukusetyenziswa kobubanzi obukhulu kungcwatywa imivumbo ephindwe kabini yodonga luyanda.Ukusetyenziswa kombhobho otyatyiweyo wodonga oluphindwe kabini xa kuthelekiswa neenkcukacha ezifanayo zexabiso lombhobho wodonga olukhanyayo lweplastiki liphantsi, umjikelo wokwakha unokufinyezwa amaxesha angama-5 ~ 10.

I-China yaqala ukwazisa imveliso yolu hlobo lombhobho ukususela kwiminyaka yoo-1990, ekuqaleni ubukhulu becala uchungechunge oluncinci lwedayamitha ye-φ 110 okanye ngaphantsi, izinto ezikrwada ubukhulu becala yi-PVC, isetyenziswa ikakhulu njenge-cable cable casing.Kwiminyaka yakutshanje, i-bellows ephindwe kabini eludongeni ikhula ngokuthe ngcembe ukuya kwicala le-diameter enkulu.Okwangoku, i-bellows enkulu yasekhaya ingaba yi-φ 1200. Izinto ezisetyenzisiweyo ezisetyenzisiweyo nazo ziphuhliswa ukusuka kwi-MAINLY PVC ukuya kwi-PE, PP njalo njalo.Isixhobo sokuvelisa iBellows sikhule ukusuka ekuqaleni.Okwangoku, iifektri ezininzi zezixhobo zasekhaya zinokuvelisa umgca wemveliso we-bellows kunye nobubanzi ukuya kwi-1200mm.

Kukho iintlobo ezintathu ze-thermoplastics ezisetyenziswa kwimibhobho yokuhambisa amanzi engcwatywe: i-POLYvinyl chloride, i-polyethylene kunye ne-polypropylene.I-elastic modulus E yezinto ezintathu (ngokwe-PREN13476-1) yile:

Ngokucacileyo, i-POLYvinyl chloride yeyona iphakamileyo, ilandelwa yi-polypropylene kunye ne-polyethylene ephantsi.Ngenxa yokuba i-elastic modulus E ye-POLYvinyl chloride inkulu kune-polyolefin, ukuqina okufanayo komsesane kunokufezekiswa ngomzuzu omncinci we-inertia I. Ukuba usebenzisa i-design wave efanayo ungasebenzisa ubuninzi bodonga oluncinci.Kuluhlu oluthile lwe-PVC kabini - i-bellows eludongeni kwi-advanteji yezoqoqosho, ngoko kwintsimi yombhobho we-drainage wangcwatywa i-PVC kabini - i-bellows eludongeni kwisicelo sokuqala nayo isixa esikhulu.Kwiminyaka yakutshanje, i-polyolefin-double bellows ikhule ngokukhawuleza, ngenxa yezi zizathu zilandelayo:

I-fluidity kunye nokuzinza kwe-thermal yezixhobo ze-PVC zihlwempuzekile, ngoko kunzima ukuvelisa umbhobho wodonga wesakhiwo esikhulu.(Okwangoku, i-diameter jikelele ye-PVC-dou-wall bellows kwiimarike zangaphandle ingaphantsi kwe-500mm. Kwintshayelelo yolwazi, mnye kuphela umenzi ofunyenweyo ukuvelisa ubukhulu be-1000mm.) Izinto ze-Polyolefin zinokuvelisa i-bellows ephindwe kabini kunye nenkulu enkulu. ububanzi (kuxelwe ukuba bufikelele kwi-1800 mm).

Ngenxa yokuba akukho lwazi lobuchwephesha kule meko xa uphuhliso lwasekhaya lombhobho wokuhambisa amanzi luqala, ngokusisiseko luxhomekeke kwishishini ukuphuthaphutha kwezinye iindlela.

Ngokomzekelo, imveliso yokuqala ye-polyethylene-double bellows isebenzise i-PE80 i-polyethylene ephezulu yoxinaniso olufanelekileyo kwimibhobho yegesi.Esi sixhobo ukuze kuqinisekiswe ukuguquguquka kombhobho werhasi, ubunzima bemolekyuli buphantsi kakhulu, imodyuli elastiki iphantsi ngokwentelekiso (ngaphantsi kwe800Mpa), esetyenziswa ekuveliseni imivumbo ephindwe kabini eludongeni kaninzi ayinakufikelela kukuqina komsesane okufunekayo, ukwandisa ubukhulu bodonga, ngokucacileyo akukho qoqosho.Ngo-2003, inkampani ye-sinopec yanhua yakhokela ekuphuhliseni i-6360M yoxinaniso oluphezulu lwe-polyethylene HDPE eludongeni oluphindwe kabini lwezixhobo zombhobho we-drain ukuze kungcwatywe i-drainage e-China ngokweemfuno zabasebenzisi, ukuzoba kumava ophuhliso lwangaphandle iminyaka emininzi kwaye ngokweemfuno zamazwe ngamazwe. imigangatho ephezulu.Inkqubo ye-polymerization ye-6360M ithatha iteknoloji yokuvelisa i-double peak, ukwenzela ukuba izinto ezikhethekileyo zibe nesakhiwo esikhethekileyo se-molecular chain, imodyuli ephezulu ye-elastic kwaye kwangaxeshanye ukuqinisekisa ukuxhathisa okugqwesileyo, ukuchasana kwempembelelo kunye nezinye iipropati.Emva koko, i-Yanhua iphuhlise izinto ezikhethekileyo ze-7000 zombhobho wokuhambisa amanzi ongcwatyiweyo ofanelekileyo kwi-polyethylene ene-double-bellows ephindwe kabini.

I-QHE16A/B, i-resin ekhethekileyo ye-HDPE enemivumbo ephindwe kabini eludongeni ephuhliswe ngokudibeneyo yi-Qilu Petrochemical Research Institute kunye nefektri yeplastiki, iye yamkelwa ngabavelisi abaninzi bemibhobho ye-caliber kwaye iye yaba yenye ye-HDPE yokuqala kunye nenempumelelo enkulu. Udonga oluphindwe kabini luvuthela intlaka ekhethekileyo ephuhliswe eTshayina.Esi sixhobo esikhethekileyo samkela ifomyula entsha ye-S-type catalyst, ineskimu sobugcisa esipheleleyo, kwaye inamandla aphezulu anyibilikayo, i-modulus egoba kunye nokuzinza kwe-thermal.Umbhobho omkhulu owenziwe ngodonga oluphindwe kabini oluveliswe ngolu hlobo lukhethekileyo lunokuvutha okulungileyo, ukuqina komsesane kunye nokusebenza okuchasene nokuguga, okufaniswa nokusebenza okubanzi kwezinto ezithunyelwa ngaphandle, kwaye zinokuhlangabezana neemfuno zemveliso yodonga oluphindwe kabini. umbhobho wamacangci wemigca eyahlukeneyo yemveliso yasekhaya.