Kuthekani ukuba umzimba wevalvu uyarusa? Inkcazo eneenkcukacha yemowudi yoqhagamshelo lwesixhobo sokuqhuba ivalvu kaninzi (I)

Kuthekani ukuba umzimba wevalvu uyarusa? Inkcazo eneenkcukacha yemowudi yoqhagamshelo lwesixhobo sokuqhuba ivalvu kaninzi (I)

Ngenkqubela phambili yezakhono, imveliso yemizi-mveliso yobushushu obuphezulu, uxinzelelo oluphezulu, ukubanda okunzulu, ivacuum ephezulu, ukubola okuqinileyo, i-radioactive, i-radioactive, enokutsha kunye neziqhushumbisi kunye nezinye iiparamitha eziphakamileyo zeemeko zesiphithiphithi ziyanda, kwaye emva koko zibeke phambili iimfuno ezingaphezulu nezingqongqo ngakumbi ukhuseleko lokusetyenziswa kwevalve, umsebenzi wefemu kunye nobomi benkonzo.
Ekubeni i-corrosion ivela kwintsebenziswano ezenzekelayo phakathi kwesinyithi kunye nokusingqongileyo, indlela yokuhlukanisa isinyithi kwindawo ejikelezileyo okanye ukusebenzisa izinto ezingeyiyo i-metallic synthetic yingqwalasela yokuthintela ukuhlwa. I-valve corrosion, edla ngokuqondwa njengesixhobo sesinyithi sevalve kwimichiza okanye isenzo se-electrochemical yokusingqongileyo ngokutshatyalaliswa.
Umhlwa womzimba wevalvu ngeendlela ezimbini, ezizezi, ukubola kweekhemikhali kunye ne-electrochemical corrosion. Isantya sokubola kwayo sixhomekeke kubushushu, uxinzelelo, iipropathi zekhemikhali zaphakathi kunye nokumelana nokugqwala kwezinto zomzimba. Isantya somhlwa sinokwahlulwa ngokwamanqanaba amathandathu:
I-1, ukuxhathisa okupheleleyo kwe-corrosion: isantya sokubola ngaphantsi kwe-0.001 mm / ngonyaka;
I-2, ukuxhathisa kwe-corrosion kakhulu: isantya sokubola 0.001 ukuya kwi-0.01 mm / ngonyaka;
I-3, ukuxhathisa ukubola: isantya sokubola 0.01 ukuya kwi-0.1 mm / ngonyaka;
I-4, ukuxhathisa ukubola: isantya sokubola 0.1 ukuya kwi-1.0 mm / ngonyaka;
I-5, ukunganyangeki kwe-corrosion: isantya se-corrosion 1.0 ukuya kwi-10 mm / ngonyaka;
I-6, ukuxhathisa umhlwa: isantya somhlwa sikhulu kune-10 mm / ngonyaka.
Nangona idatha yokukhusela i-valve yomzimba ityebile kakhulu, kodwa akulula ukukhetha ngokufanelekileyo, kuba ingxaki ye-corrosion inzima kakhulu, ngoko ke zeziphi iindlela zokukhusela i-valve body corrosion?
Okokuqala, khetha izinto ezifanelekileyo. Ukukhethwa kwezixhobo zomzimba we-valve kunzima, kodwa kwakhona akunakuqwalasela kuphela ingxaki yokubola, kufuneka iqwalasele uxinzelelo kunye nokumelana nokushisa, uqoqosho olufanelekileyo, kulula ukuyithenga kunye nezinye izinto.
Kukuthatha umlinganiselo welinen ngokulandelayo, ukuba ulayini ukhokele, ialuminiyam yomgca, iplastiki yobunjineli bomgca, irabha yendalo yomgca kunye nazo zonke iintlobo zerabha yokwenziwa. Ukuba iimeko eziphakathi ziyavuma, le yindlela yokonga.
Kwakhona, kwimeko yoxinzelelo oluphantsi kunye nobushushu, ukusebenzisa i-non-metal njengeyona nto iphambili yevalve inokuthi isebenze kakhulu ekukhuseleni ukubola.
Ukongeza, umphezulu wangaphandle womzimba wevalvu ukwaphantsi kokuhlwa kwe-atmospheric, izixhobo zentsimbi ngokubanzi kukucoca ipeyinti ukukhusela.
(a) isixhobo esisetyenziselwa ukusebenza kunye nokudibanisa ivalve. Isixhobo sinokuqhutyelwa yincwadana, umbane, i-pneumatic, i-hydraulic okanye ukudibanisa kwabo imithombo yamandla, kunye nenkqubo yokunyakaza inokulawulwa nge-stroke, i-torque okanye i-axial thrust. Sebenzisa unobumba F kunye neseti yamadijithi amabini (amanani ngamaxabiso ahambelana no-D3, asondezwe phantsi kwaye ahlulwe ngo-10). Amandla e-axial ahanjiswe ngokudibanisa i-flange kunye ne-drive ngesixhobo sokuqhuba ibonakaliswe kwi-Newton (N). Umzuzu ojikelezayo ogqithiswe ngokudibanisa i-flange kwi-drive ngesixhobo sokuqhuba ubonakaliswa kwiimitha ze-Newton (N "m).
1, umda,
Lo mgangatho uchaza imimiselo kunye neenkcazo ze-valve multi-turn drives, iikhowudi ze-flange kunye ne-torque enkulu ehambelanayo kunye ne-thrust enkulu. Imilinganiselo yeflange edityaniswe nevalve, ubume kunye nobukhulu beendawo zokuqhuba.
Lo mgangatho usebenza kwimilinganiselo yoqhagamshelo lweevalvu zevalvu kwiivalvu zesango, iglowubhu, i-throttle kunye ne-diaphragm valves, kunye nemilinganiselo yokudibanisa izixhobo zokuqhuba kwiibhokisi zegiya kunye neebhokisi zegiya kwiivalvu.
2. Amaxwebhu ereferensi eqhelekileyo
Izibonelelo zala maxwebhu alandelayo zibandakanyiwe kulo mgangatho wamazwe ngamazwe ngereferensi. Zonke izilungiso ezilandelayo (ngaphandle kweempazamo) okanye uhlaziyo kwiimbekiselo zomhla azisebenzi kulo Mgangatho wamazwe ngamazwe. Nangona kunjalo, amaqela kwisivumelwano phantsi kwalo Mgangatho waMazwe ngaMazwe ayakhuthazwa ukuba aphande ngokufumaneka kwe-*** iinguqulelo zala maxwebhu. *** iinguqulelo zeereferensi ezingabhalwanga ziyasebenza kulo Mgangatho wamazwe ngamazwe.
I-GB/T 196 Imilinganiselo esisiseko yomsonto (GB/T 196-2003,IS0 724; 1993,MOD)
3. Imigaqo neeNkcazo
qhuba
Isixhobo esisetyenziselwa ukusebenza kunye nokudibanisa ivalve. Isixhobo sinokuqhutyelwa yincwadana, umbane, i-pneumatic, i-hydraulic okanye ukudibanisa kwabo imithombo yamandla, kunye nenkqubo yokunyakaza inokulawulwa nge-stroke, i-torque okanye i-axial thrust.
Iindlela ezininzi zokuqhuba
I-shaft yemveliso inokuguqulwa ubuncinane kube kanye kwaye inokumelana ne-thrust xa i-activator idlulisela i-torque kwivalve.
torque
Umzuzu ojikelezayo ogqithiswe ngokudibanisa i-flange kwi-drive ngesixhobo sokuqhuba ubonakaliswa kwiimitha ze-Newton (N "m).
ukutyhalela
Amandla e-axial ahanjiswe ngokudibanisa i-flange kunye ne-drive ngesixhobo sokuqhuba ibonakaliswe kwi-Newton (N).
Ikhowudi yeFlange
Sebenzisa unobumba F kunye neseti yamadijithi amabini (amanani ngamaxabiso ahambelana no-D3, asondezwe phantsi kwaye ahlulwe ngo-10).
I-4, ikhowudi ye-flange yi-torque enkulu kunye ne-thrust enkulu
I-torque kunye ne-thrust edweliswe kwiThebhile 1 imele i-torque enkulu kunye ne-thrust enokuhanjiswa nge-flange kunye ne-actuator yesixhobo sokuqhuba.
Itheyibhile 1 Ukuthelekiswa kwetorque enkulu kunye nexabiso le-thrust yeFlangde no.1
5, ubungakanani boqhagamshelwano lweflange
I-Flange edibanisa i-actuator kwivalve njengoko kubonisiwe kuMfanekiso 1 kunye netheyibhile yesi-2.
IKHIWANE. 1 Umzobo woqhagamshelo lwesixhobo sokuqhuba kunye nevalve
Itheyibhile 2 Imilinganiselo ye-Flange ye-actuator eqhagamshelwe kwivalvu nge-mm
Iflange edibanisa isixhobo sokuqhuba kwivalve iya kuba yiflange eneflange enegxalaba elihlala kuyo, kwaye ubungakanani bayo obufanelekileyo buya kuba ngokwe-d2 kwiThebhile 2.
I-actuator inokudityaniswa kwi-valve ngee-studs okanye iibholiti. Ukuba uxhulumaniso lwe-stud lusetyenzisiwe, ububanzi bemingxuma ye-stud kufuneka buhambelane nomlinganiselo we-D4 kwiThebhile 2. Umsonto ngokwe-GB/T 196.
Ubuncinane bobude bomsonto wevalvu yokuqhuba iyunithi njengoko kuchaziwe kwiThebhile 2 h1.
Ubungakanani besangqa seFlange sangaphandle, ngokwetafile 2 D1 (ubuncinci).
Izikhonkwane okanye imingxuma yebholithi kufuneka igxadazele i-axis yesixhobo sokuqhuba unikezelo olulingeneyo. Jonga uMfanekiso 2.
IKHIWANE. 2 Ukuma kwezikhonkwane kunye nemingxuma yeebholiti