Iivalvu zeButterfly ezisebenza ngokuPhezulu eziphindwe kabini ezingaqhelekanga: Ubunjineli boKhuseleko loMlilo kunye nokungavuzi nto kwiMigca yeNkqubo eNzima

Intshayelelo

Kwinkqubo yanamhlanje yokucubungula iikhemikhali, ukucocwa kweoyile negesi, kunye neenethiwekhi ezinkulu zemibhobho yemizi-mveliso, imfuno yeevalvu ezincinci nezikhaphukhaphu zokwahlukanisa itshintshe kakhulu kwiinkcukacha. Iivalvu zesango kunye neevalvu zebhola bezisoloko ziyindlela eqhelekileyo yokuvala ngokuqinileyo, kodwa ubunzima bazo, ubungakanani beemvulophu, kunye neendleko zokuqalisa kwiidayamitha ezinkulu zizisa imiqobo yokwenyani kwezoqoqosho. Impendulo kushishino ibilutshintsho olukhulu.ivalvu yebhabhathane esebenza kakhulu.

Phakathi kwezi,ivalvu yebhabhathane engaqhelekanga kabini—ekwabizwa ngokuba yivalvu yebhabhathane ephindwe kabini—ibe ngumgangatho wobunjineli kwizicelo ezibandakanya uxinzelelo oluphezulu, amaqondo obushushu aphezulu, kunye neendaba eziguquguqukayo. Xa isetyenziswa kwiindawo ezinobungozi ze-hydrocarbon, ukudibanisa iteknoloji yokutywina ekhuselekileyo emlilweni ayisiyonto yokuzikhethela; ngumyalelo wokuthobela umthetho ojolise ekukhuseleni abasebenzi nasekuthinteleni iziganeko eziyingozi zokucocwa kwezixhobo.

1. Ijiyometri ye-Double Offset

Iivalvu zebhabhathane ezisemgangathweni eziqinileyo—apho ishaft idlula ngqo embindini wediski kunye nesihlalo—zinengxaki yokudibana okuqhubekayo, okune-friction ephezulu kulo lonke ujikelezo lwe-90°. Oku kukhokelela ekugugulekeni kwesihlalo ngokukhawuleza, ukukrazuka kwendawo ethile, kunye ne-torque ephezulu yokusebenza.

Ivalvu yebhabhathane engaqhelekanga ephindwe kabini ilungisa le ngxaki yokungqubana ngokusebenzisa iindlela ezimbini ezahlukeneyo zejometri:

I-Offset yokuqala: I-shaft ibekwe ngasemva kwendawo yokutywina yesihlalo sevalvu. Oku kuvumela idiski ukuba itywine ngokuqhubekayo kumda opheleleyo we-360°.

I-Offset yesibini: Umngxuma ubekwe ecaleni ukusuka embindini webhore yombhobho.

Isiphumo seCamming

Xa zidibene, ezi zinto zimbini zidibanisa izinto zenza oko iinjineli zibiza ngokuba yi-cam-like action. Xa ivalvu iqala ukuvula, idiski iphuma esihlalweni ngaphakathi kwe-1° ukuya kwi-3° yokuqala yokujikeleza. Malunga ne-95% yokuhamba kwevalvu, akukho nxibelelwano phakathi kwediski nesihlalo. Ukungqubana kuyancitshiswa, i-torque yokusebenza iyancitshiswa, kwaye ubomi benkonzo yezihlalo ze-elastomer ezithambileyo okanye ze-polymer—ezifana ne-PTFE kunye ne-RTFE—yandisiwe kakhulu.

Idatha yasentsimini ibonisa ukuba iivalvu zebhabhathane ezihlala ziqinileyo nezigcinwe kakuhle zihlala zifikelela kwiminyaka eli-15 ukuya kwengama-20 yobomi benkonzo kwizicelo ezinoxinzelelo oluphakathi, ezinye iindlela zoyilo ezidlula imijikelo yokusebenza eyi-1 yezigidi. Ukuncipha kokungqubana kukwathetha ukuba ixesha lokugcinwa kwazo liphantsi—ubomi besihlalo sevalvu buhlala bude ngokuphindwe kathathu ukuya kahlanu kunobo bezakhiwo ezihlala ziqinileyo.

2. Uyilo lweSihlalo esiKhuselekileyo emlilweni

Kwiindawo zokucoca ipetroliyam kunye neekhemikhali, izixhobo zombhobho kufuneka zigcine ukuthembeka kokutywina nokuba zigutyungelwe ngumlilo wesityalo ophuhliswe ngokupheleleyo. Ukufikelela kwimeko yokwenene yokhuseleko emlilweni kufuna ulwakhiwo olukhethekileyo lwezihlalo ezimbini.

Ilungiselelo lesihlalo esikhuselekileyo emlilweni liquka izinto ezimbini zokutywina ezisebenza ngokulandelelana:

Ukusebenza Okuqhelekileyo (I-Soft Seal Dominant):

Phantsi kweemeko zokusebenza eziqhelekileyo, isihlalo se-PTFE, i-RTFE, okanye i-Devlon esiqinileyo sisebenza njengento ephambili yokutywina, sisebenzisana ngokupheleleyo nomphetho wediski ukuze sivale ngokuqinileyo ngokuhambelana neemfuno ze-API 598 okanye ze-ISO 5208 Rate A. Kule ndlela, ivalvu ifikelela ekusebenzeni okungenalo ukuvuza.

Ukuvezwa komlilo (Itywina lesinyithi liyabandakanyeka):

Xa ubushushu obuphakathi budlula malunga ne-540°C (1,000°F) ngexesha lomlilo wesityalo, isihlalo esithambileyo sokuqala siyathamba, sibole, size ekugqibeleni sitshiswe. Kule ndawo, isihlalo sesibini sesinyithi esilayishwe kwangaphambili—esiqhele ukwenziwa kwi-Inconel 718 okanye 625—siyaphambuka phantsi koxinzelelo lomgca kwaye sitywine kumphetho wediski, nto leyo eyenza umqobo wesinyithi ube yintsimbi. Ezinye iindlela zoyilo zisebenzisa isihlalo se-RPTFE esiphambili esine-backup ye-Inconel 625, elinganiswe kwi-API 607 ​​6th Edition.

Olu thintelo lwesibini oluphakathi kwesinyithi nesinyithi luqinisekisa ukuthotyelwa kwemigangatho yovavanyo lomlilo oluqinileyo kuquka i-API 607 ​​kunye ne-ISO 10497 (eyayisakuba yi-BS 6755 Icandelo 2). I-API 607 ​​ifuna ukuba ivalvu ijikeleziswe (ivulwe kwaye ivalwe) ngexesha lovavanyo lomlilo ukuqinisekisa ukuba indlela isebenza ngelixa igqunywe ngamalangatye. Uvavanyo lubonisa ivalvu kwi-750–1,000°C imizuzu engama-30, kunye nemida yokuvuza echazwe kuzo zombini izigaba zokuvezwa komlilo kunye nokupholisa emva komlilo.

Kubalulekile ukuqaphela ukuba isiqinisekiso sokhuseleko emlilweni sisebenza kuyilo lweevalvu, kungekhona kwiivalvu nganye nganye. Nje ukuba uyilo luphumelele uvavanyo lwe-API 607, zonke iivalvu zosapho loyilo ziyaqinisekiswa ngaphandle kovavanyo lomlilo nganye nganye.

3. Iivalvu zeButterfly ezisebenza kakuhle xa kuthelekiswa neziqhelekileyo

Abaphathi beenkonzo abavavanya uyilo lwezixhobo zombane ngamanye amaxesha bayalingeka ukuba bachaze iivalvu zebhabhathane eziqinileyo ezingabizi kakhulu. Nangona kunjalo, imibhobho enoxinzelelo oluphezulu nenkonzo enzima ifuna ukuqina koomatshini bevalvu yebhabhathane esebenza kakuhle.

I-API 641, eyapapashwa okokuqala ngo-2016, ilawula uvavanyo lokukhupha umoya olubalekayo kwiivalvu zekota-turn kuquka ibhabhathane, ibhola, kunye neentlobo zeeplagi. Ichaza imijikelo yoomatshini engama-610 kunye nemijikelo emithathu yobushushu, enomlinganiselo oguqukayo nongaguqukiyo.

4. Ubungakanani be-Actuator kunye neziphumo zeendleko

Ngenxa yokuba i-double-offset geometry isusa ukungqubana kwedrag okukhoyo kwiidizayini ezijikelezayo, itshintsha ngokusisiseko iprofayili ye-torque yevalvu.

Kwivalvu yebhabhathane ephindwe kabini engaqhelekanga, i-peak torque yenzeka kuphela ngexesha lokuvalwa kwe-5° yokugqibela—oko iinjineli zikubiza ngokuba yii-torque yokuhlalaI-torque esebenzayo—amandla afunekayo ukuhambisa idiski kwinxalenye eseleyo yokujikeleza—iphantsi kakhulu.

Kwimijikelo ezenzekelayo, le phrofayili ye-torque ivelisa iingenelo ezinkulu zoqoqosho:

• Ii-Actuators ezincinci: Ungazinciphisa ii-actuators ze-pneumatic okanye ii-electric multi-turn motors ngama-20% ukuya kuma-35% xa kuthelekiswa ne-ball valve okanye i-concentric valve engachazwanga kakuhle. Eminye imithombo ixela iimfuno ze-torque ezingaphantsi ngama-30% ukuya kuma-50% kune-midline butterfly valves.

•Unyawo oluncitshisiweyo: Ii-actuators ezincinci ziguqulela ngqo kubunzima obulula bokutyibilika kunye neendleko eziphantsi zokuxhasa ulwakhiwo lweerakhi zepayipi.

•Ukusetyenziswa kwamandla okuphantsi: Ii-actuators ze-spring-return ze-pneumatic zifuna ulawulo oluncinci lomoya, nto leyo enciphisa umthwalo wombane osetyenziswayo kwizikhululo ze-compressor.

Isikhokelo esisebenzayo sokukhetha i-actuator: ukuba ivalvu ilinganisa i-80 Nm ye-torque efunekayo, i-actuator kufuneka ibe nobukhulu obuyi-100 Nm okanye ngaphezulu, kusetyenziswa i-safety factor. Iimpawu ze-torque ephantsi yoyilo oluphindwe kabini zithetha ukuba le factor yokhuseleko ingasetyenziswa rhoqo kwisiseko esincinci kunokuba kufuneka kwi-concentric valve.

5. Ukukhetha Izinto Eziyimfuneko Nokuqwalaselwa Kwisicelo

Ukuguquguquka kwevalvu yebhabhathane engaqhelekanga kabini kudlulela kwiimeko ezahlukeneyo zenkonzo, ukuba nje izixhobo zikhethwe ngokufanelekileyo.

Izinto zoMzimba:

Iinketho eziqhelekileyo ziquka intsimbi ethambileyo, intsimbi ephosiweyo (i-WCB), kunye nentsimbi engatyiwayo (i-CF8M). Kwiinkonzo zamachiza arhabaxa namanzi olwandle, kukho ii-alloys ezisekelwe kwi-super duplex kunye ne-nickel.

Iinketho Zesihlalo:

Izihlalo ezithambileyo (PTFE, RTFE, Devlon) zivala ngendlela engavumeli qhwa ukuba zisetyenziswe kwinkqubo eqhelekileyo. Izihlalo zesinyithi (Inconel, Stellite) zandisa amandla obushushu ukuya kuma-600°C kwaye azinabungozi emlilweni.

Izixhobo zeDiski:

Iinketho ziqala kwi-epoxy-coated ductile iron ukuya kwi-SS304, SS316, kunye ne-duplex steel.

Kwinkonzo yodaka olurhabaxa—njengee-tailings zemigodi, uthuthu oluphaphazelayo, okanye i-bauxite—uyilo oluphindwe kabini oluyi-eccentric lubonelela ngenzuzo ngaphezu kwee-valve ezixineneyo kuba isenzo se-cam sediski sisusa imidiya kude ne-sealing interface, sinciphisa ukubanjwa kwamasuntswana kunye nomonakalo wesihlalo. Kwizicelo ze-LNG ezi-cryogenic, izixhobo eziphathwe ngokukodwa kunye neenkqubo zokupholisa ngokunzulu zivumela ukusebenza okuthembekileyo ukuya kuthi ga kwi-−196°C.

Ukusebenzisana ne-NSW: Ukuzithemba koBunjineli

Nokuba uyila indawo yokucoca iikhemikhali, iqonga lokugrumba elingaphandle kolwandle, okanye iyunithi ebalulekileyo yokucubungula iikhemikhali, ukukhetha iinkcukacha zevalvu ezichanekileyo kumisela ixesha lokusebenza kwesityalo kunye nokusebenza kokhuseleko lwexesha elide.

KwiNkampani yeValve yaseNSW (nswvalve.com), senza iivalvu zebhabhathane eziqinisekisiweyo ze-API 607, ezikhuselekileyo emlilweni, neziyilelwe iimeko zezityalo ezifuna kakhulu. Izakhiwo zethu zokwenza iimveliso ezihambelana ne-ISO zisebenzisa i-Positive Material Identification (PMI) eqinileyo, uvavanyo olungatshabalalisiyo (NDE), kunye nomatshini wokulungisa we-CNC ngokuchanekileyo ukuze kuhanjiswe iivalvu ezingasebenzi kakuhle, i-torque yokusebenza encitshisiweyo, kunye nokulandeleka ngokupheleleyo kwe-metallurgical.

Sinikezela ngeendlela ezahlukeneyo zokuseta izihlalo—ezihlala zithambile ukuze zicinywe ngamandla, ezikhuselekileyo emlilweni ukuze zisetyenziswe kwi-hydrocarbon, kunye nezihlala ngentsimbi ukuze zisetyenziswe kubushushu obuphezulu—zonke ziyafumaneka nge-manual, gear, pneumatic, okanye electric actuation.

Nxibelelana neqela lethu lobunjineli aphanswvalve.comnamhlanje ukuze ungenise amaphepha akho edatha, uxoxe ngoqwalaselo lwe-alloy oluyilwe ngokwezifiso (njengeSuper Duplex okanye iMonel), okanye ucele iingxelo zethu zovavanyo ze-API 607 ​​ezisemthethweni.

Iingxelo zobuGcisa

•I-API 607: Uvavanyo loMlilo lweeValve zeKota kunye neeValve ezixhotyiswe ngeZitulo ezingezizo zesinyithi

•I-API 609Iivalvu zeButterfly: Uhlobo oluphindwe kabini, uhlobo lweLug kunye nohlobo lweWafer

•I-API 641Uvavanyo lwe-Fugitive Emissions kwiiValve zeKota-Turn

•I-ISO 10497Iimfuneko zovavanyo lohlobo lomlilo kwiivalvu

•I-ISO 15848-1IiValvu Zemizi-mveliso—Iinkqubo Zokulinganisa, Uvavanyo Nezokufaneleka Zokukhupha Umoya Ongcolileyo Ophuma Kwi-Emissions Embacu

•I-ASME B16.34Iivalvu—Isiphelo EsineFlanged, Esinemisonto, NesokuWelda