Abstract Polyethylene (PE) m'mipope yama pulasitiki yakula mwachangu padziko lapansi m'zaka zaposachedwa. Nkhaniyi ikupereka zitsanzo zingapo za momwe mapaipi a polyethylene (PE) amagwiritsidwira ntchito popezera madzi kuti atchulidwe ndikuthandizira.
Chitoliro cha Polyethylene (PE) ndichopendekeka kwambiri. M'zaka za m'ma 1960, mayiko akumadzulo otukuka ku Europe ndi United States adayamba kugwiritsa ntchito mapaipi a PE pakupatsira gasi m'matauni ndi makina opangira madzi. Pofika zaka za m'ma 1980, ukadaulo wa mapaipi aku PE akunja anali okhwima kwambiri. Chitoliro cha Polyethylene (PE) sichikhala ndi mbiri yakale yotchuka komanso kugwiritsa ntchito mdziko langa, makamaka ngati chitoliro chapanikizika chapa madzi, zomwe ndi nkhani yazaka zaposachedwa.
Mapaipi apulasitiki ali ndi zinthu zabwino monga kulemera kopepuka, mphamvu yayikulu, kukana dzimbiri, kutsutsana pang'ono, osakulitsa, komanso moyo wautali. Kuphatikiza pa zabwino zomwe zimapezeka pamapope apulasitiki, mapaipi a polyethylene (PE) ali ndi kusinthasintha kwapadera komanso okwera kwambiri Kutalika ndi njira yolumikizira yotentha yosungunulira kumabweretsa zabwino zambiri zomwe zida zina za chitoliro zilibe. Deyang Senpu Industrial Co., Ltd. amapanga dn20-630mm polyethylene (PE) mapaipi opangira madzi ndikuyika mapaipi a polyethylene (PE) a gasi. Zimapanganso dn20-110mm mtundu III polypropylene (PP-R) pomanga kuzirala ndi madzi otentha. Chitoliro, mzaka ziwiri zapitazi, chachita mazana a madzi ndi ntchito zoyendera gasi, ndipo chimamvetsetsa bwino zaubwino wapadera wa mapaipi a polyethylene (PE) mu ntchito za uinjiniya. Nazi zitsanzo zochepa chabe za ntchito zopezera madzi kuti zithandizire kupititsa patsogolo ndikusankha mapaipi a polyethylene (PE).
1. Pachivomezi cha Baoshan m'chigawo cha Yunnan, mipope yamadzi ya polyethylene yokha ndiyomwe inali yolimba.
Kampani ya Baoshan Water Supply Company ya m'chigawo cha Yunnan idayika magawo awiri a mapaipi amadzi a polyethylene mu Januware 2001. dn110mm ndi dn160, PN0.6MPa. Pambuyo pa miyezi yopitilira iwiri ikugwira ntchito, zivomerezi zidachitika m'derali pa Epulo 10 ndi 12, zazikulu 5.9. Pachivomerezicho, mapaipi ena am'mudzimo, kuphatikiza mapaipi a simenti, magalasi olimbitsa ma pulasitiki a mchenga wa laimu, mapaipi a UPVC ndi mapaipi azitsulo, zidawonongeka mosiyanasiyana. Madzi adabwezeretsedwa pambuyo poti apulumutsidwa mwadzidzidzi. Mapaipi a polyethylene (PE) anali osasunthika ndipo amapitilizabe kupereka madzi. Chifukwa cha kusinthasintha kwake komanso kutalika kwake, mapaipi a polyethylene (PE) amatha kusintha kusintha kwa mapaipi ndipo amakhala osagwedezeka.
2. Deyang City Water Supply Company sikufukula panjirayi ndipo imagwiritsa ntchito mapaipi a polyethylene kukonza mapaipi amadzi a konkire omwe awonongeka kale.
M'chilimwe cha 2000, chitoliro chokhazikika cha konkriti cholimbikitsidwa chokhala ndi mamilimita 300 mm mseu waukulu wochokera ku Chengdu kupita ku Mianyang mumzinda wa Deyang, m'chigawo cha Sichuan chidasokoneza madzi chifukwa chakudontha kwamadzi komwe kumakhudza maziko. Pofuna kuti isakhudze kuyenda kwa mseu waukulu, kampaniyo ndi akatswiri a kampani ya Semp adaganiza kuti asakumbire mseu waukulu ndikugwiritsa ntchito mapaipi amadzi a 250mm polyethylene (PE) pokonza mwadzidzidzi. Amalumikiza chitoliro cha 88mPE pamseu waukulu nkupita chitoliro chachikulu potenthetsera kutentha. Chitoliro cha PE chidakankhidwa pamsewu pamsewu waukulu kuchokera ku simenti. Patsiku limodzi lokha, mapaipi oposa 200 mita adakonzedwa ndipo madzi abwinobwino adabwezeretsedwanso.
3. Kampani Yowonjezera Madzi ya Kunming idagwiritsa ntchito mapaipi a polyethylene kukonza mapangidwe amadzi achitsulo osweka a South Railway Station.
Mu Januware 2002, chitoliro chamkati cha 300mm mkati choponyera madzi chachitsulo cha Kunming South Railway Station chidathyoledwa ndipo madzi amderalo adayimitsidwa. Pali njanji ndi nyumba zambiri pamwamba pa mapaipi apansi panthaka, ndipo zikadali zovuta kwambiri kukonza ndi mapaipi azitsulo. Ndalama zomwe zili mu netiweki yatsopano ndizokwera mtengo ndipo nthawi siyilola. Mothandizidwa ndi Kunming Office, itatha kuwerengera momwe madzi amayendera, adaganiza kuti agwiritse ntchito PN0.8MPa, dn250mm polyethylene (PE) mapaipi kuti alowe m'mipope yachitsulo yowonongeka yomwe ili pagulu la anthu okhala ndi chitoliro. Pakadutsa theka la tsiku, mapaipi oposa 120 adachotsedwa. Konzani madzi.
4. Kampani Yoyang'anira Madzi ya Liupanshui City m'chigawo cha Guizhou idasankha mapaipi a polyethylene m'malo mopanga mapaipi azitsulo, zomwe zidachepetsa kwambiri mtengo wa projekiti.
Hecheng Garden Water Project ya Liupanshui Water Supply Corporation, m'chigawo cha Guizhou, idapangidwa kuti igwiritse ntchito mapaipi azitsulo okhala ndi Ø600mm1400mm ndi Ø200mm3200m; mtengo wokonzedwa wa projekiti ndi yuan 3.7 miliyoni. Pambuyo pake, Municipal Design Institute idasankha mapaipi a polyethylene operekera madzi chifukwa chotsutsana kwambiri. Pambuyo powerengera kuwerengera, PN0.6MPa, dn500mm, PE 1400mm; PN0.6MPa, dn200mm, Pe chitoliro 3200m. Ntchitoyi idamalizidwa kumapeto kwa 2001, ndipo mtengo wake wonse sunadutse ndalama za yuan 3 miliyoni. Zina mwazinthuzi: Kukonzekera kwaukadaulo kumaphatikizapo ntchito zaboma, mayendedwe, ndi zina zambiri. Zachepetsedwa kuchoka pa 42 yuan / mita kufika pa 18 yuan / mita, zomwe zimachepetsa mphamvu yakukonzekera ndikuchepetsa nthawi yomanga.
5. Kampani Yopereka Madzi ya Wuhan Dongxihu imagwiritsa ntchito mapaipi a polyethylene popezera madzi kuthana ndi vuto lakupeza madzi m'madzi ndi madoko ndi mayiwe osodza.
Dongxihu District of Wuhan City, Chigawo cha Hubei ndi gawo lachitukuko lomwe lili ndi nyanja, mitsinje, ndi mayiwe, ndipo ndizovuta kuyika njira zopezera madzi. Mu Novembala 2001, Kampani Yopereka Madzi ya Dongxihu idafuna kuthana ndi vuto la madzi mderalo pagombe lakumwera kwa Niu Nan Lake. Ngati mapaipi achikhalidwe a simenti kapena mipope yachitsulo ya ductile agwiritsidwa ntchito, njira imodzi ndikutulutsa nyanjayo ndi dzenje 500 kuti muoloke nyanjayo; imodzi ndi Lay mozungulira gombe la nyanja mpaka kumtunda, pogwiritsa ntchito mapaipi osachepera 1,000. Pomaliza, kampani yamadzi idagwiritsa ntchito mapaipi a DN400 polyethylene polumikizira kumwera kwa banki yakumwera, ndikugwiritsa ntchito ng'oma za mafuta kutsogolera mapaipiwo kugombe. Pambuyo poyesa kukakamiza, madzi adawonjezeredwa ndikuwonjezeranso zida zotsutsana kuti amize mapaipi pansi pa nyanjayo. Zomangamanga zinali zosavuta komanso zachangu, komanso zidapulumutsa ndalama.
Pambuyo pake, mu ntchito ya payipi yomwe idadutsa pa Dongliu Port mita 100 komanso dziwe losodza la mita 100 yolumikizidwa, Dongxihu Water Supply Company idagwiritsa ntchito mapaipi a polyethylene ndi njira yofananira yothetsera vutoli, mapaipi ma network akhala akuyenda bwino mpaka pano.
Post nthawi: Jul-01-2021