Eminyakeni yamuva nje, i-polytetrafluoroethylene (Teflon) uhlobo lwemikhiqizo yokulwa nokungcola kanye nemikhiqizo yokulwa nokungcola kagesi kanye nemboni ye-petrochemical. Kodwa-ke, izinkinga ezilandelayo kufanele ziqashelwe ngokukhethekile laphoI-PTFE ibekwe ngaphakathiipayipiulayini ushiselwe, ngaphandle kwalokho impilo yesevisi kanye nokuphepha kwephayiphi elinomugqa we-PTFE kuzothinteka.
1. Lapho uhlanza isitsha sokuhlanganisa, akuvunyelwe ngokuphelele ukulimaza insimbi eyisisekelo. Akuvunyelwe ukushaya i-arc ensimbi eyisisekelo ngesikhathi sokushisela.
2. Engxenyeni yefillet yefillet weld, ukuphakama kwefillet weld kufanele kube ngaphezu kuka-5mm, i-engeli yokuphrojektha kufanele ibe ngaphezu noma ilingane no-3mm, kanti i-engeli yangaphakathi kufanele ibe ngaphezu noma ilingane no-10mm.
3. Lapho ushisela igobolondo lepayipi eline-PTFE, kungcono ukusebenzisa indlela yokushisela yokushisela izinqe ezinezinhlangothi ezimbili. Lokhu kudinga izinga lobuchwepheshe labasebenzi bethu, i-weld kufanele ibe yisicaba (ishintshe kahle noma ibushelelezi), ingabi nama-pores, i-welding seam kanye ne-slag incision, futhi ukuphakama kwe-weld akufanele kube ngaphezu kuka-2mm. Ngemva kokushisela, i-spatter ebangelwa ukushisela kufanele isuswe ngokuphelele.
4. Ukushisela okuqhubekayo kumele kusetshenziswe ekushiseni kwepayipi eline-PTFE, futhi umthungo wokushisela akufanele ube nemifantu noma ukunqunywa okuqhubekayo. Ukusesha Okuhlobene:ipayipi le-PTFE elilukiwe, Ipayipi eligoqekile le-PTFE
I-Polytetrafluoroethylene (PTFE) ingenye yamagama asetshenziswa kakhulu e-polytetrafluoroethylene. Ipayipi le-PTFE lisetshenziswa epayipini lensimbi engagqwali, ngakho-ke impilo yepayipi ide kakhulu kunepayipi lerabha noma ipayipi lerabha eligoqwe ngensimbi engagqwali. Inezinzuzo eziningi kunemikhiqizo yerabha.
Isigaba I: Amapayipi aqondile afakwe i-PTFE kanye nokufakwa kwamapayipi
Ngokuvamile kwaziwa ngokuthi ipayipi le-liner elikhululekile. Kule nqubo, i-PTFE isetshenziselwa ukujika ibha. Ifanelekela ipayipi lokuthutha elijwayelekile kanye nepayipi lokucindezela elihle (njengepayipi lokuhlanza imfucuza emithathu, njll.), futhi akufanele isetshenziselwe ipayipi elinomthwalo (njengokungena kanye nokuphuma kwephampu kanye nepayipi elingakhiqiza ingcindezi engemihle ngokuwa noma ukupholisa okungazelelwe).
Ukucaciswa kobubanzi: dn25-500mm
Izinga lokushisa lesevisi: - 40-180oc
Ingcindezi yesevisi: 1.6Mpa
Isigaba II: Amapayipi aqondile ahlanganiswe kahle kanye nokufakwa kwamapayipi e-PTFE
Ngokuvamile yaziwa ngokuthi ipayipi eliqinile eligoqwe ngocingo lwensimbi.
Inqubo yokukhiqiza: okokuqala, izendlalelo eziningana zefilimu ye-PTFE ziboshwe esikhumbeni, bese kuthi ucingo lwensimbi (Ø 0.5-1mm) luboshwe ngendlela ejikelezayo efilimini ye-PTFE, bese kuthi izendlalelo eziningana zefilimu encane ye-PTFE ziboshwe ngaphandle kocingo lwensimbi, bese ekugcineni zisongwe esithandweni ukuze zakheke. Udonga lwangaphakathi lwepayipi eline-PTFE elenziwe ngale nqubo lubushelelezi, kanti udonga lwangaphandle lugobile ngenxa yobuningi namandla okunwebeka kocingo lwensimbi.
Isikhala esiphakathi kodonga lwangaphandle lwepayipi eline-PTFE kanye nodonga lwangaphakathi lwepayipi lensimbi sigcwele i-resin (ngaphandle komoya osele). I-resin yokugcwalisa ingaboshwa ngokuqinile nepayipi lensimbi. Ngesikhathi esifanayo, ingasongwa ngokuqinile odongeni lwangaphandle lwe-spiral PTFE liner. Ngemva kokumiswa kwe-resin egcwele, kwakheka i-spiral ripple evalwe yi-wall ripple yangaphandle ye-lining. Lesi sakhiwo sifana nokuhlanganiswa kwe-nut ne-bolt. Ngakolunye uhlangothi, singakhawulela ngempumelelo futhi sibuyisele ukunwebeka kokushisa kanye nokufinyela okubandayo kwe-PTFE lining; ngakolunye uhlangothi, ukuqina kwensimbi kungathuthukisa kakhulu ukumelana nengcindezi engemihle ye-PTFE lining.
Ukucaciswa kobubanzi: dn25-200 mm
Izinga lokushisa lokusebenza: - 50-180oc
Ingcindezi yokusebenza: 0.5-1.6mpa
Uhlobo lwesithathu: Ipayipi le-PTFE elicindezelwe (elicindezelwe) elifakwe kahle ipayipi eliqondile
Ngokuvamile eyaziwa ngokuthi ipayipi eliqondile elinomugqa wokusunduza (ukucindezela), lisetshenziswa kabanzi emazweni athuthukile ngawo-1990.
Inqubo yokukhiqiza: okokuqala, i-PTFE powder engenisiwe isetshenziselwa ukusunduza (ukukhipha) ipayipi, bese iphoqelelwa epayipini lensimbi elingenamthungo (ububanzi bangaphandle be-liner bukhulu kancane kunobubanzi bangaphakathi bepayipi lensimbi ngo-1.5-2mm) ukuze kwakheke ulwelwesi oluqinile olungenamthungo. Ukuze kuqedwe ingcindezi, ifakwa esithandweni bese ishiswa ku-180oC ukuze iphathwe ngokushisa okuqhubekayo, ukuze isetshenziswe emazingeni okushisa angaphansi kuka-180oC. Ngesikhathi esifanayo, cindezela (cindezela) umphini wepayipi.
Amandla okuthamba ngokusobala angcono kunawepayipi eliyinxeba. Ipayipi linokumelana okuhle kakhulu nengcindezi enhle nembi.
Umehluko phakathi kwe-PTFE lining kanye ne-raber lining
I-lining tetrafluoroethylene isetshenziswa ukumelana nokugqwala kwe-fluorine, ukumelana nokushisa okuphezulu, ukumelana okunamandla kwe-asidi ne-alkali, ukunamathela okuhle kakhulu, impilo ende yenkonzo kanye nokumelana okunamandla kokungena. I-tetrafluoroethylene yonke yokufafaza iwumsebenzi wobuchwepheshe obuphezulu, iyini inqubo yayo? 1. Ngaphambi kokufafaza, ubuso budinga ukubhulwa ngesihlabathi futhi bube lukhuni, bese kufafazwa ungqimba lwe-primer ekhethekile. 2. Ngemuva kwalokho i-fluoroplastic powder ishajwa ngemishini ye-electrostatic enamandla aphezulu, futhi inamathele ngokulinganayo ebusweni be-workpiece ngaphansi kwesenzo sensimu kagesi. 3. Ngemva kokubhaka okushisa okuphezulu, izinhlayiya ze-clinker zizoncibilika zibe ungqimba oluqinile lokuvikela, olunamathele ngokuqinile ebusweni be-workpiece. Isibonelo, ifilimu yokumboza enobukhulu obuyi-1 mm nayo idinga ukufuthwa futhi ibhakwe ngokuphindaphindiwe izikhathi ezi-5-6. Ngokuvamile, ubukhulu obukhulu bungafuthwa bufike ku-2mm. I-PTFE lining iwubuchwepheshe obusetshenziswa kabanzi njengamanje. Isebenzisa ngokugcwele ukumelana nokugqwala kwe-fluorine, ubumsulwa obuphezulu, ukuhlanzeka, ukunganamatheli, ukungamanzisi, ukuzigcoba, ukumelana nokuguguleka, ukumelana nokushisa okuphezulu nokuphansi, ukufudumala, njll. enkambisweni yokwakha, i-voltage yayo kanye nogesi kuhlala kulungiswa esimweni esifanele ukuze kufezwe umphumela wokumboza. Ulwelwesi lwerabha lubizwa nangokuthi ulwelwesi lwerabha. Luwukunamathisela ipuleti lerabha elicutshunguliwe ebusweni bensimbi nge-glue ukuze kuhlukaniswe indawo egqwalisayo ne-matrix yensimbi ngenhloso yokuvikela. Irabha yemvelo kanye nerabha yokwenziwa isetshenziselwa ulwelwesi. Iningi lerabha elisetshenziswa kulwelwesi lwemishini yamakhemikhali irabha yemvelo. Ingxenye eyinhloko yerabha yemvelo yi-cis polymer ye-isoprene, evulcanized ngokufaka i-sulfur. Irabha evulcanized inokumelana nokushisa okuthile kanye namandla omshini. Ingahlukaniswa ibe irabha ethambile, irabha eqinile kanye nerabha eqinile izinhlobo ezintathu. Irabha eqinile inokumelana nokugqwala okuhle, ukumelana nokuguga kanye namandla aqinile okubopha ngensimbi. Irabha ethambile inokumelana okuhle nokubanda, ukumelana nokushisa kanye nokumelana nomthelela, futhi inokuqina okuthile; irabha eqinile iphakathi kwezimbili. Ngaphezu kwama-oxidant aqinile kanye nezinye izinyibilikisi, irabha eqinile ingamelana nokugqwala kwama-asidi amaningi angaphili, ama-asidi e-organic, ama-alkali, usawoti kanye notshwala. Ngakho-ke, ulwelwesi lwerabha oluqinile lusetshenziswa njengento eyinhloko yokulwa nokugqwala okungeyona insimbi. Irabha ye-Vulcanized ingahlukaniswa ibe irabha ye-pre-vulcanized, amanzi ashisayo ajwayelekile, irabha ye-vulcanized kanye nerabha yemvelo ye-vulcanized. Irabha ye-pre-vulcanized isetshenziswa emishinini emikhulu yokupheka.
Usesho oluhlobene nepayipi le-ptfe:
Isikhathi sokuthunyelwe: Disemba 10-2020