Eminyakeni yamuva nje, i-polytetrafluoroethylene (Teflon) uhlobo oluthile lwemikhiqizo elwa nokungcolisa namandla kagesi kanye nomkhakha we-petrochemical. Kodwa-ke, lezi zinkinga ezilandelayo kufanele zinakwe kakhulu ukuthi i PTFE ujenga ipayipi ulayini ushiselwe, kungenjalo impilo yensizakalo nokuphepha kwepayipi eligcwele u-PTFE kuzothinteka. 1. Lapho uhlanza isethi yomhlangano, akuvunyelwe nakancane ukulimaza isisekelo sensimbi. Akuvunyelwe ukushaya i-arc kusisekelo sensimbi ngesikhathi sokushisela. 2. Engxenyeni ye-fillet weld, ukuphakama kwe-fillet weld kuzoba kukhulu kuno-5mm, i-engeli yokuqagela izokuba nkulu noma ilingane no-3mm, futhi i-engeli yangaphakathi iyoba nkulu noma ilingane no-10mm. 3. Lapho ushisela igobolondo le-PTFE ujenga ipayipi, kungcono ukwamukela indlela ye-welding yokufaka insimbi emaceleni amabili. Lokhu kudinga izinga lobuchwepheshe labasebenzi bethu, i-weld kufanele ibe yisicaba (ushintsho olubushelelezi noma olubushelelezi), akukho ma-pores, umthungo we-welding kanye ne-slag incuction phenomenon, futhi ukuphakama kwe-weld akufanele kube ngaphezu kuka-2mm. Ngemuva kokushisela, i-spatter ebangelwe welding izosuswa ngokuphelele. 4. Ukushisela okuqhubekayo kufanele kwamukelwe ekushiseni kwepayipi elino-PTFE, futhi umthungo we-weld awunakuba nemifantu noma i-undercut eqhubekayo.

I-Polytetrafluoroethylene (PTFE) ingelinye lamagama asetshenziswa kakhulu e-polytetrafluoroethylene. I-PTFE hose isetshenziswa ku-hose yensimbi engenasici, ngakho-ke impilo yenkonzo ye-hose yinde kakhulu kunephayiphu yenjoloba noma i-hose yerabha ehlanganiswe ngensimbi engagqwali. Inezinzuzo eziningi ngaphezu kwemikhiqizo yenjoloba.

Ikilasi I: I-PTFE ifakwe ulayini oqondile wepayipi nokufakwa kwepayipi

Eyaziwa njengepayipi le-liner elixekethile. Kule nqubo, i-PTFE isetshenziselwa ukuvula ibha. Ilungele ingcindezi ejwayelekile nepayipi lokuhamba lokucindezela okuhle (njengepayipi lokulashwa kwemfucuza emithathu, njll.), Futhi akufanele isetshenziselwe ipayipi elinomthwalo (njengokungena nokuphuma kwepompo nepayipi elingakhiqiza ingcindezi engemihle ngokudonsa noma ukupholisa okungazelelwe).

Incazelo yobubanzi: dn25-500mm

Ukushisa kwensiza: - 40-180oc

Ingcindezi Izikhungo: 1.6Mpa

Isigaba II: Ukufakwa kwe-PTFE ipayipi eliqondile kanye nokufakwa kwepayipi

Kuyaziwa njengepayipi eliqinile elimbozwe ngocingo lwensimbi.

Inqubo yokukhiqiza: okokuqala, izingqimba eziningana ze-PTFE ifilimu zilimele esikhunjeni, khona-ke insimbi yensimbi (Ø 0.5-1mm) inxeba lomoya ku-PTFE ifilimu, bese kuthi izingqimba eziningana ze-PTFE ifilimu elincane lilinyazwe ngaphandle kwensimbi wire, futhi ekugcineni isongwe esithandweni sokwakheka. Udonga lwangaphakathi lwe-PTFE ujikeleze ipayipi olwenziwe yile nqubo lubushelelezi, futhi udonga lwangaphandle luvunguza lukathayela ngenxa yevolumu namandla e-elastic wensimbi yensimbi.

Isikhala esiphakathi kodonga olungaphandle lwe-PTFE ujenga ipayipi nodonga lwangaphakathi lwepayipi lensimbi ligcwele i-resin (ngaphandle komoya osalile). I-resin yokugcwalisa ingahlanganiswa ngokuqinile nepayipi lensimbi. Ngasikhathi sinye, ingaboshwa ngokuqinile odongeni olungaphandle lwe-PTFE liner. Ngemuva kokuphulukiswa kwe-resin egcwele, i-ripple yomoya iyakhiwa ehlanganiswe nodonga lwangaphandle lwendwangu. Lesi sakhiwo siyefana nenhlanganisela yamantongomane nebhawodi. Ngakolunye uhlangothi, ingakhawulela ngempumelelo futhi inxephezele ukunwetshwa okushisayo nokusikwa okubandayo kukalayini we-PTFE; ngakolunye uhlangothi, ukuqina kwensimbi yensimbi kungathuthukisa kakhulu ukumelana kwengcindezi engemihle yolwelwesi lwe-PTFE.

Incazelo yobubanzi: dn25-200 mm

Ukushisa okusebenzayo: - 50-180oc

Ingcindezi Ukusebenza: 0.5-1.6mpa

Uhlobo lwesithathu: ipayipi le-PTFE push (squeeze) elihlanganiswe ngopayipi oqondile

Ngokuvamile eyaziwa ngokuthi yi-push (squeeze) ulayini oqondile, isetshenziswa kabanzi emazweni athuthukile ngawo-1990.

Inqubo yokukhiqiza: okokuqala, i-PTFE powder esetshenzisiwe isetshenziselwa ukuphusha (ukukhipha) ipayipi, bese iphoqelelwa ukungena epayipini lensimbi elingenamthungo (ububanzi bangaphandle be-liner bukhulu kancane kunobubanzi obungaphakathi bepayipi lensimbi ngo-1.5- 2mm) ukwakha ulwelwesi oluqinile olungenamthungo. Ukuze kuqedwe ingcindezi, ifakwa esithandweni bese ifutheliselwa ku-180oC ukwelashwa okushisa njalo, ukuze isetshenziswe ezingeni lokushisa elingaphansi kuka-180oC. Ngasikhathi sinye, phusha (khama) umphini wepayipi

Amandla aqine ngokusobala angcono kunalawo weshubhu lenxeba. Ipayipi linokumelana okuhle nengcindezi enhle nengalungile.

Umehluko phakathi kwe-PTFE ulwelwesi nolwelwesi lwenjoloba

Ulwelwesi i-tetrafluoroethylene lwenziwa ukumelana nokugqwala kwe-fluorine, ukumelana nokushisa okuphezulu, i-asidi enamandla nokumelana ne-alkali, ukunamathela okuhle kakhulu, impilo yensizakalo ende nokuqina kokungena okuqinile. Konke ukufafaza i-tetrafluoroethylene kungumsebenzi wobuchwepheshe obuphakeme, yiziphi izinqubo ezigelezayo? 1. Ngaphambi kokufafaza, ingaphezulu lidinga ukufakwa esihlabathini bese lixutshwa, bese kufuthwa ungqimba we-primer ekhethekile. 2. Bese impuphu ye-fluoroplastic ikhokhiswa yimishini ye-high-voltage electrostatic, futhi ngokulinganayo ikhangiswe ebusweni bento yokusebenza ngaphansi kwesenzo senkambu kagesi. 3. Ngemuva kokubhaka kokushisa okuphezulu, izinhlayiya ezincibilikayo ziyoncibilika zibe ungqimba oluminyene oluvikelayo, olunamathele ngokuqinile ebusweni bento yokusebenza. Isibonelo, ifilimu yokumboza eyi-1 mm nayo idinga ukufafazwa futhi ibhakwe kaninginingi izikhathi ezingama-5-6. Ngokuvamile, ukushuba okuphezulu kungafuthwa ku-2mm. Ulwelwesi lwe-PTFE ubuchwepheshe obusetshenziswa kabanzi njengamanje. Isebenzisa ngokugcwele ukumelana nokugqwala kwe-fluorine, ubumsulwa obuphakeme, inhlanzeko, ukunganamatheli, ukumanzisa okungamanzi, ukuzithambisa, ukugqoka ukumelana, ukumelana nokushisa okuphezulu nokuphansi, ukwahlukanisa, njll kunqubo yokwakha, i-voltage yayo kanye ne-current zihlale zilungiswa ku isimo ekahle ukufeza umphumela enamathela. Ulwelwesi lwenjoloba lubizwa nangokuthi ulwelwesi lwenjoloba. Ukunamathisela ipuleti lenjoloba elicutshungulwayo ebusweni bensimbi ne-adhesive ukwehlukanisa okuphakathi okulimazayo kumatrix ensimbi ngenhloso yokuvikela. Iraba yemvelo nenjoloba yokwenziwa isetshenziselwa ulwelwesi. Iningi lenjoloba elisetshenziselwa ulwelwesi lwezinto zamakhemikhali injoloba yemvelo. Ingxenye eyinhloko yerabha yemvelo yi-cis polymer ye-isoprene, ehlanganiswa ngokufaka isibabule. Injoloba evundlisiwe inokumelana nokushisa okuthile kanye namandla womshini. Ingahlukaniswa irabha elithambile, injoloba elukhuni kanye nenjoloba enzima izinhlobo ezintathu. Irabha eliqinile linokumelana okuhle nokugqwala, ukumelana nokuguga namandla okuqinisa aqinile ngensimbi. Injoloba ethambile inokumelana okuhle nokubandayo, ukumelana nokushisa nokuphikisana nomthelela, futhi inokunwebeka okuthile; irabha elinzima eliphakathi nendawo liphakathi kwamabili. Ngaphezu kwama-oxidants aqinile kanye namanye ama-solvent, irabha eliqinile lingamelana nokugqwala kwama-acid amaningi angaphili, ama-organic organic, i-alkalis, usawoti kanye nama-alcohol. Ngakho-ke, ulwelwesi olunzima lwenjoloba lusetshenziswa njengempahla esemqoka yokulwa nokugqwala engeyona eyensimbi. Injoloba e-Vulcanized ingahlukaniswa irabha eyenziwe ngaphambilini, ingcindezi ejwayelekile yamanzi ashisayo irabha eyenziwe ngomshini kanye nenjoloba yemvelo evundisiwe. Injoloba yangaphambilini esetshenzisiwe isetshenziswa emishini enkulu yokuchofoza.