Ukukhetha ingcambu ye-valve yediskhi kunye nendlela yokutshintsha iValve

Ukukhetha ingcambu ye-valve yediskhi kunye nendlela yokutshintsha iValve

Ingcambu ye-disc ye-valve isetyenziselwa ukutywina intonga yomnyango okanye ukutywina i-disc, enokuthintela ukuphuma kwendawo yokusebenza. I-valve disc eradication idlala indima yokutywina, kodwa ifuna ukukhuhlana okuncinci kunye nesiqu, akufanele kuthintele isenzo se-stem. Ukukhethwa kweengcambu ze-valve disc kufuneka kusekelwe kwindawo yokusebenza, uxinzelelo kunye nobushushu, ukusetyenziswa kwezinto zediski kunye nokuma akufani.
Okokuqala, ukhetho lweengcambu zevalve
Ingcambu ye-disc ye-valve isetyenziselwa ukutywina intonga yomnyango okanye ukutywina i-disc, enokuthintela ukuphuma kwendawo yokusebenza. I-valve disc eradication idlala indima yokutywina, kodwa ifuna ukukhuhlana okuncinci kunye nesiqu, akufanele kuthintele isenzo se-stem.
Ukukhethwa kweengcambu ze-valve disc kufuneka kusekelwe kwindawo yokusebenza, uxinzelelo kunye nobushushu, ukusetyenziswa kwezinto zediski kunye nokuma akufani.
Itheyibhile 5-1 idwelisa ulwahlulo, ukusebenza, kunye noluhlu lwesicelo lweengcambu zediski eziqhelekileyo.
Itheyibhile 5-1 Ukuhlelwa, ukusebenza, kunye noluhlu lwesicelo lweengcambu zediski eziqhelekileyo Uxinzelelo lwezinto
Ubushushu (MPa)
C i-asbestos coil ingcambu ye-oyile kunye negraphite emiliselwe i-asbestos ucingo (ingcambu yepan) nge-pre-oxidation okanye i-carbonization yefayibha ye-polypropylene, i-emulsion ye-polytetrachlorethylene efakwe kwi-emulsion (ingenziwa kwimilo esemgangathweni) i-PTFE ifayibha, i-emulsion ye-PTFE efakiweyo Umsesane wokutywina wegraphite oguquguqukayo nguxande wecandelo lomnqamlezo wesangqa Eyesibini, indlela yokutshintshwa kweengcambu zevalve
Ukupakisha iValve kufuneka utshintshe, ufuna ukubeka ukupakisha endala, kodwa qaphela ukuba ungonakalisi intonga yomnyango, ipleyiti yokutywina kunye nebhokisi yokufaka, emva kwayo yonke into yokupakisha endala, unokutshintsha ukupakisha okutsha, ukupakisha okutsha, kuqala ukukhetha ubungakanani kunye ukusebenza ukuhlangabezana neemfuno zokupakisha, ungavumeli ukuba phezulu naphantsi, kusetyenziswe kwisizukulwana esikhulu okanye ukutyunyuzwa, kwaye ke ukupakisha kufuneka kunqunyulwe kwisangqa esinye, Umlingane wengcambu yediski kufuneka unqunywe ngokucocekileyo kwi-Angle ebukhali ye-45 °. , nobude bayo bufaneleke. Xa usika ingcambu ye-disc, ingcambu ye-disc inokulimala ngokuqinileyo kwintonga ejikelezayo kunye nobubanzi obulingana nobubanzi be-valve stem, kwaye emva koko umgca we-incision urekhodwa ngaphambi kokusika. Yongeza ikhonkco cut coil kwibhokisi coil nganye nganye, kwaye usebenzise ikepusi uxinzelelo okanye ** isixhobo ukuba phawundi ingcambu coil kwaye iculwe isangqa ngasinye. Ukusikwa kwengcambu yekhoyili nganye kufuneka kugxadazele ngama-90°, 180° okanye 90°, 180°.
Ukupakisha kwidosi kwaye ucinezele kwakhona isibonelelo esifanelekileyo, ubunzulu boxinzelelo lwedlala kwigumbi lokupakisha, kungabi ngaphantsi kwe-10% yokuphakama kwegumbi lokupakisha, akufuneki kube ngaphezulu kwe-20% ~ 30%, kunye nedlala lokupakisha eliqinileyo, ngaphezulu. iyunifomu, amandla Screw tight ukupakisha kulungile xa ujikelezisa isiqu sevalve, ukuze ukhangele ukupakisha qinisa ubungakanani besiqu sevalve, idlala eliqinileyo, kufuneka liphakame, akukho nto ithambekayo.
Ufakelo ingcambu idiskhi ezimile, inokumiselwa ngokuthe ngqo kwisiphelo esiphezulu sevalve isiqu kufuneka kube kangangoko kunokwenzeka ukusebenzisa indlela iseti ngqo abantu, xa isigcwalisi ayikwazi ukusetwa ngqo abantu, nako ukusebenzisa indlela yokusika i-lap.
Ukugcinwa kweValve 1.1 Ukugcinwa kweValve kunye neendawo zokufakela ukuqwalaselwa
1). Ivalve kufuneka ifakwe kwigumbi elomileyo nelinomoya, kwaye zombini iziphelo zobubanzi kufuneka zitywinwe kwaye zingabinathuli;
2). Ukugcinwa kwexesha elide kufuneka kuhlolwe rhoqo, kwaye indawo yokucubungula kufuneka ifakwe ngeoli ukukhusela ukubola;
3) Ngaphambi kokufakwa kwevalve, jonga ngokucophelela ukuba uphawu luhambelana neemfuno zokusetyenziswa;
4). Ngethuba lokufakela, indawo yangaphakathi kunye nokutywinwa kwendawo yokutywina kufuneka ihlambuluke, kwaye ukupakishwa kufuneka kuhlolwe ukuze kubonwe ukuba kugxininiswe ngokuqinileyo, kwaye iibholiti zokudibanisa kufuneka ziqiniswe ngokulinganayo.
5). I-valve kufuneka ifakwe ngokuhambelana nesikhundla esivumelekileyo sokusebenza, kodwa ingqalelo kufuneka ihlawulwe ekugcinweni nasekusebenzeni kakuhle;
6) Ekusetyenzisweni, musa ukuvula i-valve yesango ukuze ulungelelanise izinga lokuhamba, ukuze ungonakalisi indawo yokutywina xa isantya esiphakathi siphezulu, kufuneka sivuleke ngokupheleleyo okanye sivalwe ngokupheleleyo;
7). Xa uvula okanye ucima i-handwheel, ungasebenzisi ezinye iilever ezincedisayo;
8). Iindawo zokuhambisa kufuneka zithanjiswe rhoqo; Ivalve kufuneka ihlale i-oyile kwindawo ejikelezayo kunye ne-stem trapezoidal thread part
9) Emva kofakelo, ukugcinwa rhoqo kufuneka kuqhutywe ukucima ukungcola kwindawo yangaphakathi, khangela indawo yokutywinwa kunye nokugqoka i-valve stem nut;
10). Kufuneka kubekho iseti yemigangatho yokufakela yenzululwazi kunye nechanekileyo, uvavanyo lokusebenza lokutywina kufuneka lwenziwe kugcino, kunye neerekhodi ezineenkcukacha kufuneka zenziwe kuphando.
11) Eminye imiba efuna ukuqwalaselwa:
1) Iivalvu kufuneka zibekwe ngokubanzi phambi kofakelo lombhobho. Umbhobho kufuneka ube yindalo, isikhundla asitsali nzima, ukuze ungashiyi i-prestress;
2) Ngaphambi kokubeka i-valve yobushushu obuphantsi kufuneka ibe kangangoko kunokwenzeka kwindawo ebandayo (njenge-nitrogen engamanzi) ukwenza uvavanyo lokuvula nokuvala, ukuguquguquka kwaye akukho mcimbi we-jamming;
3) Ivalve yolwelo kufuneka imiselwe nge-Angle ye-10 ° ethambekileyo phakathi kwesiqu kunye nenqanaba ukuphepha ulwelo oluphuma ecaleni kwesikhondo kunye nokwandisa ilahleko ebandayo; Okubaluleke ngakumbi, kuyimfuneko ukuphepha ulwelo oluchukumisa umphezulu wokutywina wokupakisha, ukwenzela ukuba kubanda kwaye kube nzima kwaye kulahlekelwe umphumo wokutywinwa, okubangelwa ukuvuza;
4) ukudityaniswa kwevalve yokhuseleko kufuneka kube yingqiniba ukuphepha impembelelo ngqo kwivalve; Ukongeza ekuqinisekiseni ukuba ivalve yokhuseleko ayinaqabaka, ukuze ingasebenzi kakuhle;
5) ukufakwa kwevalve yeglowubhu kufuneka yenze indlela yokuhamba okuphakathi ihambelane notolo oluphawulwe kumzimba wevalve, ukuze uxinzelelo kwicone ephezulu yevalve xa ivalve ivaliwe, kwaye ukupakishwa kungabikho phantsi komthwalo. Kodwa akuqhelekanga ukuvulwa kunye nokuvala kwaye kufuneka uqinisekise ngokungqongqo ukuba kwimeko evaliweyo ayivuzi i-valve (njenge-valve yokufudumeza), inokuguqulwa ngokuqaphela, ngoncedo loxinzelelo oluphakathi ukuze luvale;
6) iinkcukacha ezinkulu zevalve yesango, i-valve yokulawula i-pneumatic kufuneka ifakwe ngokuthe nkqo, ukwenzela ukuba ingakhethi icala elinye ngenxa yobunzima be-spool, ukwandisa ukunxiba komatshini phakathi kwe-spool kunye ne-bushing, okubangelwa ukuvuza;
7) Xa uqinisa isikhonkwane sokucinezela, i-valve kufuneka ibe kwindawo evulekile kancinci, ukuze ingonakalisi indawo yokutywina ye-valve top;
8) Emva kokuba zonke iivalve zikhona, kufuneka zivulwe kwaye zivalwe kwakhona, kwaye zifanelekile ukuba ziguquguquka kwaye zingabambeki;
9) Emva kokuba inqaba enkulu yokwahlula umoya ipholile, i-valve flange yokudibanisa iqiniswe kwangaphambili kanye kwindawo ebandayo ukukhusela ukuvuza kwiqondo lokushisa kunye nokuvuza kwiqondo lokushisa eliphantsi;
10) Akuvumelekanga ngokungqongqo ukukhwela i-valve stem njenge-scaffold ngexesha lofakelo
I-11) Ivalve yobushushu obuphezulu ngaphezu kwe-200 ℃, kuba ukufakwa kubushushu begumbi, kwaye emva kokusetyenziswa okuqhelekileyo, ubushushu buphakama, ibholidi kukwandiswa kwe-thermal, i-gap iyanda, ngoko kufuneka iqiniswe kwakhona, ebizwa ngokuba "yi-hot tight" , umqhubi kufuneka anikele ingqalelo kulo msebenzi, ngaphandle koko kulula ukuvuza.
12) Xa imozulu ibanda kwaye i-valve yamanzi ivaliwe ixesha elide, amanzi emva kwevalve kufuneka asuswe. Emva kokuba ivalve yomphunga iyeke umphunga, amanzi ajingisiweyo nawo kufuneka angabandakanywa. Umzantsi wevalve usebenza njengeplagi yocingo, enokuvulwa ukuze ikhuphe amanzi.
I-13) Iivalve ezingezizo zetsimbi, ezinye zilukhuni, amandla athile aphantsi, ukusebenza, ukuvula kunye nokuvala amandla angeke abe mkhulu kakhulu, ngakumbi akakwazi ukwenza amandla. Kwakhona nikela ingqalelo ukuphepha ukungqubana kwento.
I-14) Xa i-valve entsha isetyenzisiweyo, ukupakishwa akufanele kugxininiswe ngokuqinileyo ukuze kugwenywe ukuvuza, ukwenzela ukuba ugweme uxinzelelo oluninzi kwi-stem, ukukhawuleza ukugqoka, kunye nokuvula nokuvala.
1.2 Inkqubo yokusebenza nendawo yokusebenza
1.2.1 Ngexesha lokwakha, umakhi, isebe lokhuseleko, isebe lemveliso yefektri kunye neyunithi yokwakha baya kulungelelanisa ngokupheleleyo ukucacisa umda woxanduva lomsebenzi.
1.2.2 Umntu osisigxina uya kusebenza kwisiza kwindawo yakhe yoxanduva lokusebenza.
1.2.3 Xa ususa okanye ufaka i-valve, imveliso yemihla ngemihla ngaphakathi koluhlu oluthile oluchaphazelekayo kulo msebenzi kufuneka lutshintshwe kwaye lulungiswe ngokufanelekileyo, kwaye i-medium kwipayipi kufuneka inqunywe.
1.2.4 Indawo yokusebenza eyimfuneko ekusebenzeni iya kuqinisekiswa kwindawo yokusebenza.
1.2.5 Amalungu axhasayo alungele ubunzima bevalve aya kusekwa kwindawo yokusebenza ukuthintela i-valve sag kunye ne-pipe center offset.
1.2.6 Emva kokugqitywa komsebenzi, kufuneka kwenziwe amalungiselelo ovavanyo loxinzelelo, uvavanyo lwe-air tightness, ukuhlolwa okungonakalisi kunye nezinye izinto zokuhlola.
1.2.7 Ngaphambi kokuba umsebenzi ugqitywe, umnatha wombhobho uya kucocwa ngaphakathi, kwaye ipleyiti eyimfama kumbhobho iya kuqinisekiswa ukuba isuswe, kwaye i-valve eqhutywe ngexesha lokwakha iya kubuyiselwa kwindawo yokuvula kunye nokuvala ngaphambi kokwakhiwa. .
1.3 Imigqaliselo yofakelo lwevalvu
1.3.1 Ngaphambi kofakelo lwevalvu, kuya kuqinisekiswa ukuba isivalo siyahlangabezana neemfuno zoyilo kunye nemigangatho efanelekileyo.
1.3.2 Xa uphethe kwaye ufaka iivalve, lumkela amaqhuma kunye nemikrwelo
1.3.3 Phambi kokufakela isivalo, umphandle wombhobho kufuneka ucocwe ukuze kususwe ukungcola okufana neefayili zentsimbi kwaye kuthintelwe amaqumrhu angaphandle ekufakweni kwisitulo sotywino lwesivalo. Ukongezelela, i-valve kufuneka ifakwe kwindawo evaliweyo.
1.3.4 Ukusebenza kwevalve yokunyusa. Ivalve IZA KUNYUKA NGOKUCHANEKILEYO KWINDAWO YOKUPHAKAMISA ESISHIYIWEYO, KWAYE AYISAYI KUPAKANYISWA OKANYE IYA KUTYHLWA PHANTSI komkhosi wendawo.
1.3.5 Xa ufaka i-valve, kuyimfuneko ukuqinisekisa ukuba i-flow direction ye-medium, ifom yofakelo kunye nendawo ye-handwheel ihlangabezana nemimiselo.
1.3.6 Ufakelo lweevalvu zokudibanisa iflange.
(1) Umphezulu weflange wevalve kunye nemibhobho kufuneka ingabinamonakalo, imikrwelo, njalo njalo, kwaye igcinwe icocekile. Ngokukodwa, ukusetyenziswa kwee-gaskets zetsimbi (icandelo le-oval okanye i-octagonal), i-flange grooves kunye ne-gaskets kufuneka ihambelane, ifakwe nge-red lead ehambelanayo, ukuqinisekisa ukuba isitywina sikwimeko efanelekileyo.
(2) I-perpendicularity yendawo yeflange kumbhobho kunye nomgca ophakathi wombhobho kunye nephutha lomngxuma we-flange bolt kufuneka ube phakathi koluhlu lwexabiso elivumelekileyo. I-valve kunye nomgca wesikhungo sombhobho kufuneka uhambelane phambi kokufakwa.
(3) Xa udibanisa ama-flanges amabini, okokuqala, i-flange yokutywina ubuso kunye ne-gasket kufuneka icinezelwe ngokulinganayo, ukwenzela ukuba kuqinisekiswe ukuba i-flange idibaniswe nguxinzelelo olufanayo lwe-bolt.
(4) Xa uqinisa iibholithi, sebenzisa isitshixo esihambelana nendongomane. Xa usebenzisa uxinzelelo lweoli kunye nezixhobo ze-pneumatic zokuqinisa, qaphela ukuba ungadluli i-torque echaziweyo.
(5) Ukuqiniswa kweflange kufuneka kuphephe amandla angalinganiyo, kwaye kufuneka kuqiniswe ngokulandelelana kwicala le-symmetry kunye nokuhambelana.
(6) Emva kokufakwa kweflange, qiniseka ukuba zonke iibholiti kunye namantongomane ziqinile kwaye zifana.
(7) Impahla yeebholiti kunye namantongomane kufuneka ihlangabezane nemimiselo. Emva kokuqinisa, intloko ye-bolt kufuneka ibonakaliswe kwi-nut ye-pitch ezimbini ezifanelekileyo.
(8) Ibholithi kunye ne-screw fastening, ukuze kuthintelwe ukungcangcazela okubangelwa kukukhulula, ukusebenzisa i-gaskets. Ukuze ugweme ukunamathela phakathi kweentambo kwiqondo lokushisa eliphezulu, iinxalenye zentambo kufuneka zifakwe kwi-agent echasene ne-adhesion (molybdenum disulfide) ngexesha lofakelo.
(9) Kwiivalvu ezingaphezulu kwama-200 degrees celcius, iibholiti zoqhagamshelo lweflange, iibholithi zokuvala zokuvala, iibholiti zokutywina kunye nokupakisha iibholithi zokuvala ucinezelo kufuneka ziqiniswe kwakhona emva kokunyuka kwamaqondo obushushu.
(10) Ivalve yeqondo lokushisa eliphantsi ifakwe kwimeko yobushushu be-atmospheric. Kwisicelo esisebenzayo, xa i-medium idlula, iba yimeko yobushushu obuphantsi. Ngenxa yokwakheka umahluko lobushushu, flanges, gaskets, iibholiti kunye namantongomane, njalo njalo, shwabanisa, kwaye ngenxa yokuba izinto ezi nxalenye azifani, i-coefficient yokwandiswa kwe-linear nayo yahlukile, yenza ukuba kube lula kakhulu ukuvuza iimeko zokusingqongileyo. Ukususela kule meko yenjongo, xa uqinisa iibholithi kwiqondo lokushisa lomoya, i-torque ethatha ingqalelo kwizinto ezinqamlekileyo zecandelo ngalinye kwiqondo lokushisa eliphantsi kufuneka lamkelwe.
1.3.7 Ufakelo lweevalvu ezidityanisiweyo
(1) Ukucutshungulwa kwee-socket joints kunye ne-butt welding groove kufuneka ichaneke kwaye ihambelane nemigangatho efanelekileyo.
(2) Ngexesha lokuwelda, ukuthintela iitshiphu zentsimbi kunye neembotyi ezidityanisiweyo zingangeni kumbhobho, kufuneka kusetyenziswe ukuwelda kwegesi ye-tungsten enert.
(3) Xa uwelda, isivalo kufuneka sivuleke kancinane.
(4) Izinto ze-welding kufuneka zikhethwe ngokuchanekileyo ngokwevalve kunye nezixhobo zokubhobhoza. Xa USEBENZISA i-electrode e-COATED, jonga imeko yokugcina i-electrode kwaye uqinisekise ukuba unyango olufanelekileyo lokumisa i-electrode edibeneyo luthathwa.
(5) Abasebenzi ababandakanyekayo ekusebenzeni kwe-welding yombane baya kuhlangabezana neemfuno zabachwephesha be-welding yombane.
(6) Xa unyango lobushushu lufuneka emva kwe-welding, ixesha kunye nerekhodi ye-curve yeqondo lokushisa kufuneka ihlolwe.
(7) Amacandelo e-welding aya kuhlolwa ngokubonakalayo okanye angonakalisi ukuqinisekisa ukuba akukho zintanda, ii-welding nodules, i-edge bites kunye nezinye iziphene eziyingozi.