Kwiminyaka yakutshanje, i-polytetrafluoroethylene (Teflon) luhlobo lokulwa ukungcola kunye nokulwa imveliso ye-fouling yamandla ombane kunye ne-petrochemical industry. Nangona kunjalo, ezi ngxaki zilandelayo kufuneka zihlawulwe ngakumbi xa I-PTFE igcwele umbhobho Umgca wenziwe nge welding, kungenjalo ubomi benkonzo kunye nokukhuseleka kombhobho wepayipi we-PTFE uya kuchaphazeleka. 1. Xa ucoca indawo yendibano, akuvumelekanga ngokungqongqo ukonakalisa isiseko sentsimbi. Akuvunyelwe ukubetha i-arc kwisiseko sesinyithi ngexesha lokudibanisa. 2. Kwindawo yeflet welding, ubude be-fillet weld buya kuba bukhulu kune-5mm, i-angle engqameneyo iya kuba nkulu okanye ilingane ne-3mm, kwaye i-engile yangaphakathi iya kuba nkulu okanye ilingane ne-10mm. 3. Xa ufaka iigobolondo zombhobho ogqityiweyo we-PTFE, kungcono ukwamkela indlela ye-welding enamacala amabini. Oku kufuna inqanaba lobuchwephesha labasebenzi bethu, i-weld kufuneka ibe tyaba (ukutshintsha okuthe tye okanye ukutyibilika ngokutyibilikayo), akukho zimbiwa, iwelding seam kunye ne-slag inconuction phenomenon, kwaye ukuphakama kwe-weld akufuneki kube ngaphezulu kwe-2mm. Emva kwe-welding, i-spatter ebangelwa yi-welding iya kususwa ngokupheleleyo. 4. Ukudibanisa okuqhubekayo kufuneka kwamkelwe ekufakeleni umbhobho we-PTFE, kwaye umphetho we-weld awuyi kuba neentanda okanye i-undercut eqhubekayo.

I-Polytetrafluoroethylene (PTFE) lelinye lamagama asetyenziswa rhoqo e-polytetrafluoroethylene. PTFE ithumbu lisetyenziswa kumbhobho wesinyithi, ngoko ke ubomi benkonzo yethumbu lide kakhulu kunombhobho werabha okanye umbhobho werabha osongelwe ngentsimbi. Inezibonelelo ezininzi ngaphezulu kweemveliso zerabha.

Iklasi I: I-PTFE igcwele umbhobho kunye nemibhobho yokulinganisa

Eyaziwa ngokuba yipayipi ye-liner evulekileyo. Kule nkqubo, i-PTFE isetyenziselwa ukuguqula ibha. Ifanelekile uxinzelelo oluqhelekileyo kunye noxinzelelo lombhobho wokuhambisa uxinzelelo (njengemibhobho yokunyanga inkunkuma emithathu, njl.), Kwaye akufuneki isetyenziselwe umbhobho onomthwalo (njengokungena nokuphuma kwempompo kunye nombhobho onokuthi uvelise uxinzelelo olubi Ngokulahla okanye ukupholisa ngesiquphe).

Ubungakanani beenkcukacha: dn25-500mm

Ubushushu benkonzo: - 40-180oc

Uxinzelelo Service: 1.6Mpa

Iklasi II: I-PTFE ihlanganiswe ngokuqinileyo kumbhobho kunye nokufakwa kweepayipi

Kuyaziwa ngokuba ngumbhobho oqinileyo wokugubungela ngocingo lwentsimbi.

Inkqubo Manufacturing: okokuqala, maleko eziliqela PTFE ifilimu abonzakeleyo ngumngundo, ngoko ucingo sentsimbi (Ø 0.5-1mm) inxeba yomoya kwi PTFE umboniso, kwaye ke maleko ezininzi PTFE bhanyabhanya obhityileyo zinxeba ngaphandle kwesinyithi ucingo, kwaye ekugqibeleni isongelwe kwiziko lokwakha. Udonga lwangaphakathi lwe-PTFE embhobho eyenziwe yile nkqubo igudile, kwaye udonga lwangaphandle lujikeleze incence ngenxa yomthamo kunye namandla e-wire of steel.

Isithuba phakathi kodonga olungaphandle lwe-PTFE embhobho yombhobho kunye nodonga lwangaphakathi lombhobho wentsimbi luzaliswe yintlaka (ngaphandle komoya oshiyekileyo). I-resin yokugcwalisa inokubotshwa ngokuqinileyo kumbhobho wentsimbi. Kwangelo xesha, inokusongelwa ngokuqinileyo kudonga lwangaphandle lwe-PTFE liner. Emva kokuphiliswa kwentlaka ezalisiweyo, isirinji esijikelezayo senziwa esiveliswe ngodonga lwangaphandle lwelining. Esi sakhiwo iyafana indibanisela nut kunye evulwa. Kwelinye icala, inokunciphisa umda ngokufanelekileyo kwaye ibuyisele ukwandiswa kwe-thermal kunye nokunciphisa ukubanda kwe-PTFE lining; kwelinye icala, ukuqina kwentambo yesinyithi kunokuphucula uxinzelelo olubi lwe-PTFE lining.

Ububanzi beenkcukacha: dn25-200 mm

Iqondo lobushushu lokusebenza: - 50-180oc

Uxinzelelo Ukusebenza: 0.5-1.6mpa

Uhlobo lwesithathu: Umbhobho we-PTFE (cudisa) umbhobho ovalwe ngokuqinileyo ngombhobho othe ngqo

Ngokuqhelekileyo yaziwa ngokuba kukutyhala (tywina) umbhobho ongqongqo, isetyenziswa ngokubanzi kumazwe ahambele phambili ngeminyaka yoo-1990.

Inkqubo lemveliso: okokuqala, amazwe PTFE olungumgubo lisetyenziselwa ukutyhala (extrude) umbhobho, kwaye ke inyanzeliswa kumbhobho wesinyithi engenamthungo (sangqa sangaphandle se-liner sikhulu kancinci kunobubanzi bangaphakathi bombhobho wentsimbi ngo-1.5- 2mm) ukwenza ulungelelwaniso olungenamthungo. Ukuphelisa uxinzelelo, kufakwa eziko kwaye kufudunyezwe ukuya kwi-180oC kunyango olushushu rhoqo, ukuze isetyenziswe kubushushu obungaphantsi kwe-180oC. Kwangelo xesha, tyhala (cudisa) ishafpa yombhobho

Amandla eqine ngokucacileyo angcono kunalawo wetyhubhu yenxeba. Umbhobho unokumelana okufanelekileyo noxinzelelo kunye nokubi.

Umahluko phakathi kwemigca ye-PTFE kunye nokufakwa kwirabha

Ukufakela i-tetrafluoroethylene kusetyenziswa ukumelana nokubola kwe-fluorine, ukumelana nobushushu obuphezulu, i-asidi eyomeleleyo kunye nokumelana ne-alkali, ukubambelela okugqwesileyo, ubomi benkonzo ende kunye nokumelana nokungena okuqinileyo. Ukutshiza yonke i-tetrafluoroethylene ngumsebenzi wobuchwephesha, zithini iinkqubo zayo? 1. Phambi kokutshiza, umphezulu kufuneka uthanjiswe ngesanti kwaye ucoceke, kwaye kufafazwe umaleko okhethekileyo. 2. Emva koko umgubo we-fluoroplastic uhlawuliswa ngezixhobo eziphezulu ze-electrostatic, kunye ne-adsorbed ngokulinganayo kumphezulu womsebenzi phantsi kwesenzo sombane. 3. Emva kokubhaka kobushushu obuphezulu, amasuntswana e-clinker aya kunyibilika abe ngumaleko oxineneyo wokhuselo, odityaniswe ngokuqinileyo kumphezulu womsebenzi. Umzekelo, ifilimu yokujiya eyi-1 mm nayo ifuna ukutshizwa kwaye ibhakwe kaninzi kangangezihlandlo ezi-5-6. Ngokubanzi, ubukhulu obukhulu bunokutshizwa kwi-2mm. I-PTFE lining yitekhnoloji esetyenziswa ngokubanzi okwangoku. Isebenzisa ngokupheleleyo ukumelana nokubola komhlwa, ukucoceka okuphezulu, ucoceko, ukungaxineki, ukungamanzisi, ukuthambisa ioyile, ukunxiba ukumelana, ubushushu obuphezulu kunye nobushushu obuphantsi, ubushushu, njl.nkqubo yokwakha, umbane wayo kunye nekhoyo ngoku zihlengahlengiswa rhoqo imeko efanelekileyo yokuphumeza isiphumo sokutyabeka. Ukufakwa kwirabha kukwabizwa ngokuba kukufakwa irabha. Kukuncamathela kwipleyiti yerabha egqityiweyo kumphezulu wentsimbi kunye nokuncamathelisa ukwahlulahlula phakathi kwento etshabalalisayo ukusuka kwimatrix yentsimbi ngenjongo yokukhusela. Irabha yendalo kunye nerabha eyenziweyo zisetyenziselwa ulungelelwaniso. Uninzi lwerabha esetyenziswe kulwakhiwo lwezixhobo zemichiza yirabha yendalo. Eyona nto iphambili yerabha yendalo yi-cis polymer ye-isoprene, e-vulcanized ngokongeza isalfure. Irabha e-vulcanized inokumelana nobushushu kunye namandla oomatshini. Inokwahlulahlulwa ibe yirabha ethambileyo, irabha enzima kwaye irabha elukhuni iintlobo ezintathu. Irabha enzima ine-corrosion elungileyo, ukuxhathisa ukwaluphala kunye namandla omeleleyo wokuqina kunye nesinyithi. Irabha ethambileyo inokumelana nengqele elungileyo, ukumelana nobushushu kunye nefuthe lokumelana, kwaye ine-elasticity ethile; irabha enzima semi iphakathi ezimbini. Ukongeza kwii-oxidants ezomeleleyo kunye nezinye izinyibilikisi, irabha elukhuni inokumelana nokubola kwezona zinto zingaphiliyo emzimbeni, iiacidi eziphilayo, ialkali, ityuwa kunye notywala. Ke ngoko, ulwelo olunerabha oluqinileyo lusetyenziswa njengeyona nto iphambili yokulwa nokubola. Irabha ye-Vulcanized inokwahlulwa ibe yirabha eyenziwe ngaphambili, uxinzelelo oluqhelekileyo lwamanzi ashushu kunye neerabha yendalo. Irabha eyenziwe ngaphambili isetyenziswa kwizixhobo zokuchola ezinkulu.