Iibhola ezi-4 zokuqina
Eyona nto ibalulekileyo yokutywina izixhobo zokuhlalaiivalve zebholayi-polytetraoxyethylene (PTFE), enovakalelo phantse kuzo zonke izinto zekhemikhali, kwaye inomlinganiso ophantsi wokukhuhlana, ukusebenza okuzinzileyo, akukho lula ukuguga, uluhlu olubanzi lwesicelo sobushushu kunye nokusebenza kokutywina Iimpawu ezigqibeleleyo ezibanzi.Nangona kunjalo, iipropathi ezibonakalayo ze-PTFE, kubandakanywa i-coefficient yokwandisa okuphezulu, uvakalelo lokuhamba okubandayo kunye nokungahambi kakuhle kwe-thermal, kufuna ukuyilwa kwezitywina zesihlalo sevalve ukugxila kwezi mpawu.Imathiriyeli yeplastiki yesitywina sesihlalo sevalve ikwabandakanya iPTFE egcweleyo, inayiloni kunye nezinye izinto ezininzi.Nangona kunjalo, xa izinto zokutywinwa ziba nzima, ukuthembeka kwesitywina kuya konakaliswa, ngakumbi kwimeko yokuhluka koxinzelelo oluphantsi.Ukongeza, irabha yokwenziwa efana nerabha ye-butyl inokusetyenziswa njengesixhobo sokutywina isitulo sevalvu, kodwa amayeza ayo aphakathi kunye noluhlu lobushushu alinganiselwe.Ukongeza, ukuba i-medium ayifakwanga i-lubricated, ukusetyenziswa kwerabha yokwenziwa kunokwenzeka ukuba idibanise ibhola.
Ukuze kuhlangatyezwane neemfuno zokusetyenziswa kwezicelo zoshishino ezifana nobushushu obuphezulu, uxinzelelo oluphezulu, ukukhukuliseka okunamandla, ubomi obude, njl.njl., iivalve zebhola ezitywinwe ngentsimbi ziye zaphuhliswa kakhulu kwiminyaka elishumi edlulileyo.Ngokukodwa kumazwe aphuhlileyo amashishini anjenge-United States, i-Italiya, iJamani, iSpain, iNetherlands, njl. njl., ulwakhiwo lwevalve yebhola luye lwaphuculwa ngokuqhubekayo, kwaye kuye kwakho iivalvu zebhola ezidityanisiweyo ezithe ngqo ezingcwatywe umzimba. iivalve zebhola, kunye neevalvu zebhola kwimibhobho yomgama omde, izixhobo zokucoca i-oyile, njl. njl iivalve zebhola zivela, ukuze iteknoloji yevalve yebhola ifikelele kwinqanaba elitsha.
5 Uyilo lwevalvu yeBhola kunye nokuveliswa
Ngenxa yokusetyenziswa kwe-Computer Aided Design (CAD), i-Computer Aid Manufacturing (CAM) kunye ne-Mulberry Manufacturing System (FMS) kushishino lwevalvu, ukuyilwa kunye nokuveliswa kweevalve zebhola kufikelele kwinqanaba elitsha.Ayiphelelanga nje ekuhlaziyeni ngokupheleleyo indlela yokubala yoyilo lwevalvu, kodwa iphinde yanciphisa umsebenzi woyilo onzima nophindaphindwayo wabasebenzi abaziingcali kunye nobugcisa, ukuze amagcisa abe namandla amaninzi okuphucula, ukuphucula ukusebenza kwemveliso kunye nophuhliso lwemveliso entsha, kunye nokunciphisa uphando kunye umjikelo wophuhliso lweemveliso ezintsha., Ukuphucula imveliso yabasebenzi ngendlela ejikelezayo, kwaye kwinkqubo yophando kunye nophuhliso lokuphakamisa intonga yentsimbi yokutywina ivalve yebhola, ngenxa yokusetyenziswa kwe-CAD / CAM, i-flat ebanzi ye-spiral eyenziwe ngoyilo oluncediswa yikhompyutheni kunye nekhompyutheni. Izixhobo zomatshini ze-CNC ezincediswayo ziye zavela, eziyintsimbi yentsimbi.I-valve yebhola ayinayo imikrwelo kunye nokugqoka ngexesha lokuvula nokuvala, ukwenzela ukuba ukusebenza kokutywinwa kunye nobomi benkonzo yevalve yebhola kuphuculwe kakhulu.Xa ivalve yebhola ivulwe ngokupheleleyo, uxhathiso lokuqukuqela luncinci kakhulu, luphantse lulingane no-zero, ngoko ke ivalve yebhola elingana nedayamitha elinganayo isetyenziswa kakhulu kwimibhobho ye-oyile nerhasi kuba kulula ukucoca umbhobho.Ngenxa yokuba ibhola yevalve yebhola yosulwa ngexesha lokuvula nokuvalwa kwenkqubo, iivalve ezininzi zebhola zingasetyenziswa kumajelo eendaba ngamasuntswana aqinileyo amisiweyo.Ngokuxhomekeke kwizinto eziphathekayo zendandatho yokutywina, ingasetyenziselwa kwi-powder kunye ne-granular media.
6 Ivalve yebhola ngamaxesha asebenzayo
Kuba ivalve yebhola ihlala isebenzisa irabha, inayiloni kunye ne-polytetraoxyethylene njengesixhobo sokutywina isihlalo, ubushushu bokusetyenziswa kwayo bukhawulelwe yisixhobo sokutywina sesitulo sevalve.Isiphumo sokunqunyulwa kobubanzi bebhola siphunyezwa ngebhola yentsimbi ecinezelwe omnye komnye phakathi kwezihlalo zevalve yeplastiki phantsi kwesenzo se-medium (ivalve yebhola edadayo).Ngaphantsi kwesenzo soxinzelelo oluthile loqhagamshelwano, i-valve seat sealing ring ikhubaza ngokwanelisayo nangeplastiki kwezinye iindawo.Olu tshintsho lunokuhlawulela ukuchaneka kokuveliswa kunye nobunzima bomhlaba webhola, kunye nokuqinisekisa ukusebenza kokutywinwa kwevalve yebhola.
Ukongeza, ekubeni umsesane wokutywina wesihlalo sevalve yebhola ngokuqhelekileyo yenziwe ngeplastiki, xa ukhetha isakhiwo kunye nokusebenza kwevalve yebhola, kuyimfuneko ukuqwalasela ukuxhathisa umlilo kunye nokumelana nomlilo wevalve yebhola, ngakumbi kwi-petroleum. iikhemikhali, i-metallurgical kunye namanye amacandelo, kumajelo anokutsha kunye nokuqhuma Ukusetyenziswa kweevalve zebhola kwisixhobo kunye nenkqubo yokubhobhoza kwe-United States kufuneka ihlawule ngakumbi ukuxhathisa umlilo kunye nokukhusela umlilo.
Ngokuqhelekileyo, ukulungiswa kweendawo ezimbini, ukusebenza kokutywinwa okungqongqo, udaka, i-abrasion, ishaneli yentamo, ukuvulwa ngokukhawuleza kunye nokuvala isenzo (1/4 ukuvula nokuvala), ukunqunyulwa koxinzelelo oluphezulu (umehluko omkhulu woxinzelelo), ingxolo ephantsi, i-cavitation kunye i-vaporization, kwiinkqubo zombhobho ezinomlinganiselo omncinci wokuvuza kwi-atmosfera, i-torque encinci yokusebenza kunye nokuchasana kwamanzi amancinci, iivalve zebhola ziyacetyiswa.
Iivalvu zebhola zikwafanelekile kwiinkqubo zombhobho ezinesakhiwo sokukhanya, ukunqunyulwa koxinzelelo oluphantsi (umahluko omncinci woxinzelelo), kunye neendaba ezidliwayo.
Iivalvu zebhola zingasetyenziswa kubushushu obuphantsi (cryogenic) izixhobo kunye neenkqubo zemibhobho.
Kwinkqubo yemibhobho ye-oksijini yoshishino lwesinyithi, iivalve zebhola eziye zafumana unyango olungqongqo lwe-degreasing luyafuneka.
Xa imigca ephambili kwimibhobho yeoli nerhasi kufuneka ingcwatywe phantsi komhlaba, kufuneka iivalvu zebhola ezidityanisiweyo ezigcweleyo.
Xa ulungelelaniso lokusebenza lufunekayo, i-valve yebhola enesakhiwo esikhethekileyo esinokuvulwa kwe-V kufuneka ikhethwe.
Kwipetroleum, i-petrochemical, ikhemikhali, amandla ombane, kunye nokwakhiwa kwedolophu, iivalvu zebhola ezitywiniweyo zetsimbi ukuya kwintsimbi zingasetyenziselwa iinkqubo zemibhobho kunye namaqondo obushushu asebenzayo angaphezu kwama-200 ° C.
7 Imigaqo yokusetyenziswa kweevalvu zebhola
Kwimibhobho ye-oyile kunye negesi yendalo, imibhobho efuna ukucocwa, kwaye ingcwatywe emhlabeni, sebenzisa i-all-pass kunye ne-alded ball valves;xa ungcwatywe emhlabeni, khetha iivalve zebhola ezidityanisiweyo okanye eziphothiweyo;imibhobho yesebe , Khetha uxhulumaniso lwe-flange, uqhagamshelwano lwe-welding, ukupasa okupheleleyo okanye ukunciphisa ivalve yebhola.
Kumbhobho wokuthutha kunye nezixhobo zokugcina i-oyile esulungekisiweyo, sebenzisa iivalve zebhola ezine-flanged.
Kwigesi yesixeko kunye nemibhobho yegesi yendalo, sebenzisa iivalvu zebhola ezidadayo ezinoqhagamshelwano lweflange kunye noqhagamshelo lwangaphakathi lomsonto.
Kwinkqubo yombhobho we-oksijini kwinkqubo yesinyithi, ivalve yebhola esisigxina eye yafumana unyango olungqongqo lwe-degreasing kunye nokudibanisa i-flanged kufuneka isetyenziswe.
Kwiinkqubo zemibhobho yobushushu obuphantsi kunye nezixhobo, iivalve zebhola ezisezantsi ezinebhonethi kufuneka zisetyenziswe.Kwinkqubo yombhobho yeyunithi yokuqhekeka yeyunithi yeyunithi yokusulungekisa i-oyile, ivalve yohlobo lokuphakamisa ingakhethwa.
Kwizixhobo kunye neenkqubo zemibhobho yeendaba ezitshabalalisayo ezifana ne-asidi kunye ne-alkali kwiinkqubo zemichiza, kuyacetyiswa ukuba kusetyenziswe zonke iivalvu zebhola zensimbi ezingenasici ezenziwe nge-austenitic stainless steel kunye ne-polytetraoxyethylene njengesihlalo kunye nendandatho yokutywina.
Izivalo zentsimbi zokutywina zentsimbi zingasetyenziswa kwiinkqubo zemibhobho okanye izixhobo zobushushu obuphezulu beendaba kwiinkqubo zetsimbi, iinkqubo zamandla, ukufakwa kwepetrochemical, kunye neenkqubo zokufudumeza ezidolophini.
Xa ulungelelwaniso lokuhamba lufuneka, i-worm-gear drive, i-pneumatic okanye ivalve yebhola yombane ene-V yokuvula i-V ingakhethwa.