Ngawaphi amanyathelo okugcinwa ngokukhuselekileyo kwemibhobho kunye neevalvu? Kutheni iivalvu zesango zingavumelekanga ukuba kufakwe imibhobho yeoksijini
1. Ngaphambi kokugcinwa, kuyimfuneko ukuqinisekisa ukuba i-valve, ipayipi kunye nenkqubo zixhomekeke ngokuthembekileyo, kwaye inkqubo apho i-valve kunye nepayipi ikhona ingalungiswa kuphela emva kokukhupha amanzi kunye nokunciphisa uxinzelelo kwi-zero. Xa usika umbhobho, umbhobho osikiweyo kufuneka uvalwe kwangethuba ukukhusela i-debris. Xa i-beveling, abasebenzi kufuneka banxibe iiglasi zokukhusela, kwaye i-Mars splashing direction ayifanele ime. Isixhobo esitshintshwayo kufuneka singqinwe yimathiriyeli kwaye ibe nesatifikethi sesiqinisekiso phambi kokuba isetyenziswe ukuthintela izinto ezingalunganga. Kugcino lombhobho wesoda kunye nomgubo womoya, umbhobho omdala uyasikwa, umbhobho omtsha, ijoyinti yokwandisa kunye nengqiniba zifakelwe kwaye ziphakanyiswe, kwaye indawo engezantsi ithintelwe ngokungqongqo ukuba ime kwaye idlule xa iwelding, ukunqanda ukwenzakala, ukutshisa. kunye nokutshisa.
2, khulula ivalve amandla entloko yombane, umthombo womoya wentloko yepneumatic, kwaye uxhome uphawu lwesilumkiso. Xa ususa intloko yombane kunye ne-pneumatic, khulula ibholithi kwaye uyiphakamise ngokukhawuleza phantsi nge-hoist, kwaye uyibeke. Emva kokuchithwa, iinxalenye ze-valve kufuneka zibekwe kwindawo echongiweyo, kwaye umhlaba kufuneka ubekwe nge-rubber pad ukukhusela umonakalo kwisixhobo kunye nomhlaba. Xa UKHULULA I-valve flange BOLT, UMSEBENZI AKAVUMELEKANGA ukuma kwindawo edibeneyo yeflange, ukuba kukho intsalela yokulimala kwe-soda. Phambi kokuba umbhobho wamalahle odiliziweyo uyeke ukusebenza, amalahle asasaziweyo kumbhobho kufuneka avuthelwe acoceke ukunqanda ukuvutha okuzenzekelayo kokufumba komgubo.
3. Phambi kokudityaniswa, umphezulu odityanisiweyo wesiseko sevalve kunye nesihlalo sevalvu uya kuhlolwa kwaye ufanelekile phambi kokuhlanganisa. Xa sihlanganisana, kufuneka sihlambulule iinxalenye ezamkelweyo kunye namacandelo, ngokungqongqo ngokulandelelana kwenkqubo, ukukhusela ukuvuza kunye nokungahambi kakuhle. Ukusila kwesitulo sevalvu kunye nespool kuya kuzalisekisa ngokungqongqo imigangatho yenkqubo erhabaxa, ecolekileyo necolekileyo. Xa kutshintshwa isandpaper esicaba sokusila, izixhobo zokusila ziya kubekwa phambili kuqala ukukhusela amandongomane kunye nezinye izinto ezininzi ekuweleni kwiqokobhe levalvu.
Imilinganiselo yobugcisa yokugcinwa kwemibhobho kunye nevalvu
1. Emva kokugcinwa kwendawo yevalve, uvavanyo lwe-hydraulic luqhutywa kunye nomzimba webhoyili. I-Tooth pad plane kufuneka ihambe kakuhle ngaphandle kweempawu zesilika, iintanda, njl., ukwenza isigcwalisi kufuneka kube lula kwaye singonakalisi. I-joint iya kuba yi-45 °, i-staggered 1200 yokubeka. Coca kwaye ukhangele i-valve stem kunye nebhokisi yokupakisha, ipolishi nge-sandpaper, udonga lwebhokisi lokupakisha kufuneka lucoceke, isihlalo sokupakisha kufuneka sicoceke ngaphandle kwamanxeba, i-elliptical kufuneka ibe I-2, igobolondo kufuneka ihambelane, indawo edibeneyo kufuneka igudiswe, kungabikho grooves, izibazi, ukususa i-pitting, imigodi, amanqaku esilika, ukufezekisa okukhanyayo okuhambelanayo, okugudileyo, uburhabaxa be-0.2, ukutywinwa kwendawo ngaphandle kweziphene. Umphezulu wesihlalo esithweleyo ugudileyo kwaye awubonakalisi, akukho mhlwa. Ibhola yentsimbi ilungile kwaye kufuneka ijikeleze ngokuguquguqukayo. Isihlalo sevalve kunye nodonga lwangaphakathi lomkhono wobhedu kufuneka lube mpuluswa kwaye lukhululekile, kwaye i-ellipticity yomkhono kufuneka ibe 3, umsantsa phakathi kwesiqu sevalve kunye ne-bushing ephantsi yesigqubuthelo phantsi kwe-spool yi-0.2mm, isithuba phakathi kwesikhondo sevalve kunye nesihlalo sevalve yi-0.3-0.4mm, isithuba phakathi kwesikhondo sevalve kunye nesigqubuthelo sokupakisha kunye nesitulo sokupakisha. yi-0.15-0.20mm, isithuba phakathi kwesivalo sevalve kunye nesihlalo sevalve yi-0.2-0.3mm, isithuba phakathi kwewasha kunye nesigqubuthelo sevalvu kunye nesihlalo sevalve yi-1.0-1.2mm, Umsantsa phakathi kwedlala kunye nesihlalo ngu-0.5- 1.0mm.
4, isiqu sevalve ekujikelezweni kwespool kufuneka sibe bhetyebhetye, phezulu nasezantsi sikhulule nge-0.05mm, i-spool kwisihlalo sevalve bhetyebhetye. Akusayi kubakho mlomo ungalunganga ucacileyo kumbhobho, kwaye ingaphakathi lombhobho liya kuba mpuluswa kwaye i-weld seam iya kuzaliswa. Xa uqhawula, umlomo wocingo kufuneka uthintelwe ukuba ungonakaliswe, utshintshi luguquguqukayo, kwaye akukho ukuvuza kwangaphakathi. Ibhanti yoqhagamshelwano kufuneka iqhubeke kwaye ifane ibe ngaphezu kwe-2/3 yobubanzi, kwaye kukho umgca wokutywina oqhubekayo. Iringi ye-tetra kufuneka ifakwe kwi-groove, kwaye i-gap phakathi kwamacala amane kufuneka ilingane. I-disc kwi-series ye-valve isihlalo sokuhamba kufuneka sigcinwe kwi-1-1.5 mm.
Kutheni iivalvu zesango zingavumelekanga ukuba kufakwe imibhobho yeoksijini
Ngokuhambelana ne "GB 16912-1997 i-Oxygen kunye nokhuseleko lwegesi ehambelanayo Imigaqo yobugcisa" kwizinto eziphathekayo zevalve: uxinzelelo lukhulu kune-0.1mpa, akuvunyelwe ukusebenzisa i-valve yesango, i-0.1mpAP0.6mpa, i-disc ye-valve yinsimbi engenasici, i-0.6 mpAP10mpa, yonke intsimbi engenasici okanye yonke ivalve yealloy yobhedu,
P
Xa 10 mpa
, yonke ialloyi yesiseko sobhedu.
Kwiminyaka yakutshanje, ngokunyuka kokusetyenziswa kweoksijini, abasebenzisi abakhulu beoksijini basebenzisa ukuhanjiswa kwemibhobho yeoksijini. Ngenxa yombhobho omde, ukusasazwa okubanzi, kunye nokuvula ngokukhawuleza okanye ivalve yokuvala, okukhokelela kwimibhobho yeoksijini kunye neengozi zokutsha zevalve zenzeka ngamaxesha athile, ngoko, kwaye ukuthatha amanyathelo ahambelanayo kubalulekile.
Okokuqala, imibhobho emininzi eqhelekileyo yeoksijini, ukutsha kwevalvu kubangela uhlalutyo
1. Umhlwa, uthuli kunye ne-welding slag kwingxabano yombhobho kunye nodonga lwangaphakathi lombhobho okanye i-valve port, ekhokelela ekutshisweni kobushushu obuphezulu.
Le meko inxulumene nohlobo lokungcola, ubungakanani besuntswana kunye nesantya sokuhamba komoya. I-iron powder kulula ukutshisa nge-oksijeni, kwaye i-finerate ye-particle size, i-low point yokutshisa; Ukukhawuleza kwesantya segesi, kunokwenzeka ngakumbi ukutshisa.
2. Kukho igrisi, irabha kunye nezinye izinto ezinendawo yokutshisa ephantsi kumbhobho okanye ivalve, eya kuvutha kwiqondo lobushushu eliphezulu lendawo.
Indawo yokutshisa yezinto ezininzi ezinokutsha kwioksijini (kuxinzelelo lwe-atmospheric):
Igama lendawo yokutshisa amafutha (℃)
Ioli yokuthambisa 273 ~ 305
Vulcanized fiber mat 304
Irabha 130 ~ 170
Irabha yeFluorine 474
Idityaniswe ngokudibeneyo ne-392 b
Teflon 507
3. Ubushushu obuphezulu obuveliswa yi-adiabatic compression kubangela ukuba izinto ezinokutsha zitshise
Umzekelo, phambi kokuba ivalve ibe yi-15MPa, iqondo lobushushu yi-20℃, kwaye uxinzelelo ngasemva kwevalve yi-0.1mpa. Ukuba i-valve ivulwa ngokukhawuleza, ubushushu be-oksijini emva kokuba ivalve ingafikelela kwi-553 ℃ ngokwe-formula yokunyanzeliswa kwe-adiabatic, efikelele okanye yadlula indawo yokutshisa kwezinye izinto.
4. Indawo yokuncitshiswa kwezinto ezinokutsha kuxinzelelo oluphezulu ioksijini esulungekileyo kukunyanzeliswa kokutsha kwevalve ye-oksijini yombhobho.
Umbhobho weoksijini kunye nevalve kuxinzelelo oluphezulu ioksijini ecocekileyo, umngcipheko mkhulu kakhulu, uvavanyo lubonakalise ukuba umlilo we-*** ungalingana ngokuphambeneyo nesikwere soxinzelelo, nto leyo ibeka isoyikiso esikhulu kumbhobho weoksijini kunye nevalve.
Okwesibini, amanyathelo okuthintela
1. Uyilo luya kuhambelana nemimiselo kunye nemigangatho efanelekileyo
Uyilo kufuneka luhambelane ne-1981 Ministry of Metallurgy ekhutshwe yi-Iron and Steel Enterprise oxygen pipe network yemimiselo emininzi, kunye neoksijini kunye nemigaqo yobugcisa yokhuseleko lwegesi (GB16912-1997), "ikhowudi yoyilo lwesikhululo se-Oxygen" (GB50030- 91) kunye neminye imimiselo kunye nemigangatho.
(1) Umlinganiselo omkhulu wokuhamba kweoksijini kumbhobho wentsimbi yekhabhoni kufuneka uhambelane nolu luhlu lulandelayo.
Isantya esikhulu sokuhamba kweoksijini kumbhobho wentsimbi yekhabhoni:
Uxinzelelo lokusebenza (MPa) 0.1 0.1 ~ 0.6 0.6 ~ 1.6 1.6 ~ 3.0
Isantya sokuhamba (m/s) 20, 13, 10, 8
(2) Ukuze kuthintelwe umlilo, icandelo le-alloy yesiseko sobhedu okanye umbhobho wensimbi engenasici kunye nobude obungekho ngaphantsi kwama-5 ububanzi bombhobho kwaye ungekho ngaphantsi kwe-1.5m kufuneka udibaniswe emva kwevalve ye-oksijini.
(3) Ingqiniba kunye nentloko ye-bifurcation ifanele ibekwe ibe mbalwa kangangoko kunokwenzeka kumbhobho weoksijini. Ingqiniba yombhobho weoksijini onoxinzelelo lokusebenza olungaphezulu kwe-0.1mpa kufuneka wenziwe ngeflange yohlobo lwevalvu enesitampu. Umkhombandlela wokuhamba komoya wentloko ye-bifurcation iya kuba ngama-45 ukuya kuma-60 eengile ukusuka kwicala lokuhamba komoya oyintloko.
(4) Kwi-butt welding ye-concave-convex flange, ucingo lwe-welding yethusi lusetyenziswa njenge-O-ring, eyindlela ethembekileyo yokutywinwa kwe-oxygen flange enokutsha.
(5) Umbhobho weoksijini kufuneka ube nesixhobo sokuqhuba kakuhle, ukuxhathisa komhlaba kufuneka kube ngaphantsi kwe-10, ukuxhathisa phakathi kweeflange kufuneka kube ngaphantsi kwe-0.03.
(6) Isiphelo sombhobho oyintloko weoksijini kwindawo yokusebenzela kufuneka yongezwe ngombhobho wokukhulula ukuze kube lula ukucocwa nokutshintshwa kombhobho weoksijini. Phambi kokuba umbhobho omde weoksijini ungene kwivalve elawulayo kwindawo yokusebenzela, kufuneka kusetwe isihluzo.
2. UFakelo lwamanyathelo
(1) onke amalungu adibana neoksijini kufuneka acocwe ngokungqongqo, athotywe ngomoya owomileyo okanye initrogen ngaphandle kweoyile.
(2) I-Welding iya kuba yi-argon arc welding okanye i-arc welding.
3. Izilumkiso zokuSebenza
(1) Xa uvula okanye uvala ivalve yeoksijini, kufuneka iqhutywe kancinane. Umsebenzisi kufuneka eme kwicala levalve kwaye ayivule kube kanye kwindawo.
(2) Akuvumelekanga ngokungqongqo ukusebenzisa ioksijini ukubrasha umbhobho okanye ukusebenzisa ioksijini ukuvavanya ukuvuza noxinzelelo.
(3) Ukuphunyezwa kwenkqubo yetikiti lokusebenza, kwangaphambi kokusebenza kwenjongo, indlela, iimeko zokwenza inkcazo eneenkcukacha kunye nezibonelelo.
(4) Iivalve ze-oksijini ze-Manual ezinobubanzi obungaphezulu kwe-70mm zivumelekile ukuba zisebenze kuphela xa ukuhlukana koxinzelelo phakathi kwe-front and back of the valve kuncitshiswe ngaphantsi kwe-0.3mpa.
4. Imiqathango yolondolozo
(1) Umbhobho weoksijini ufanele uhlolwe kwaye ugcinwe rhoqo, ususwe umhlwa uze upeyintwe, rhoqo emva kweminyaka emi-3 ukuya kwemi-5.
(2) Ivalve yokhuseleko kunye negeyiji yoxinzelelo kumbhobho kufuneka ijongwe rhoqo, kanye ngonyaka.
(3) Phucula isixhobo sokumisa.
(4) Ngaphambi komsebenzi oshushu, ukutshintshwa kunye nokucoca kufuneka kuqhutywe. Xa isiqulatho seoksijini kwigesi evuthelweyo siyi-18% ~ 23%, siyafaneleka.
(5) I-Valve, i-flange, i-gasket kunye nombhobho, ukhetho lokufakwa kombhobho kufuneka luhambelane ne-"Oxygen kunye nemigaqo yobugcisa bokhuseleko lwegesi ehambelanayo" (GB16912-1997) imimiselo efanelekileyo.
(6) Ukuseka iifayile zobugcisa, ukusebenza kukaloliwe, ukuhlaziya kunye nokugcinwa kwabasebenzi.
5. Amanye amanyathelo okhuseleko
(1) Ukuphucula ukubaluleka kolwakhiwo, ugcino kunye nokusebenza kwabasebenzi kukhuseleko.
(2) ukuphucula ukuqaphela kwabasebenzi bolawulo.
(3) Ukunyusa umgangatho wenzululwazi nobuchwepheshe.
(4) Ukuphucula ngokuqhubekayo isicwangciso sokuhanjiswa kweoksijini.
Isiphelo:
Isizathu sokuba kuvalwe ivalve yesango kungenxa yokuba umphezulu wokutywina wevalve yesango kwintshukumo ehambelanayo (oko kukuthi, iswitshi yevalve) iya kubangela umonakalo we-abrasion ngenxa yokungqubana, xa yonakele, kukho umgubo wentsimbi osuka kumphezulu wokutywina. , amasuntswana anjalo omgubo wentsimbi kulula ukutshisa, le yingozi yokwenene.
Ngapha koko, umbhobho weoksijini awuvumelekanga kwivalvu yesango, ezinye iivalvu zokumisa zineengozi, indawo yokutywina yevalve yokumisa iya konakaliswa, njengoko kunokuba yingozi, amava amashishini amaninzi kukuba umbhobho weoksijini wonke usebenzisa ivalve yealloy yobhedu. , kungekhona i-carbon steel, ivalve yensimbi engenasici.
I-valve ye-alloy ye-Copper ineenzuzo zamandla aphezulu omatshini, ukumelana nokunxiba, ukhuseleko oluhle (aluvelisi umbane osisigxina), ngoko ke isizathu sokwenene kukuba indawo yokutywina ye-valve yesango kulula ukuyinxiba kunye nokuvelisa isinyithi eyona nto ibangela, njengoko. kuba ukwehla kokutywinwa akusiyo isitshixo.
Ngapha koko, isango lemibhobho yeoksijini ayisetyenziswa njengengozi, idla ngokuvela kumacala omabini omehluko woxinzelelo lwevalve mkhulu, ivalve ivula ngokukhawuleza, iingozi ezininzi zikwabonisa ukuba umthombo wokutshisa kunye nefutha ngunobangela wokuphela, khubaza. ivalve yesango yindlela kuphela yokulawula amafutha, kunye nomhlwa, ukuhla, i-oyile evaliweyo rhoqo iyafana, injongo Ngokubhekiselele kulawulo lokuhamba kwesantya, yenza umsebenzi olungileyo wokumisa i-electrostatic kukuphelisa umthombo womlilo. . Ngokomntu cinga ukuba izinto zevalve zizinto, kumbhobho we-hydrogen nazo zivela iingxaki ezifanayo, iinkcukacha ezintsha zinamagama ziya kukhubaza isango elisusiweyo, liyitestamente, isitshixo sokufumana isizathu, iinkampani ezininzi zilula kungakhathaliseki ukuba luxinzelelo olusebenzayo, zinyanzeliswa. ngevalve yengxubevange yobhedu, kodwa njengoko ezinye iingozi zenzeka, ngoko ukulawula umlilo kunye namafutha, ukugcinwa ngononophelo, Isitshixo kukuqinisa umtya wokhuseleko.
Ixesha lokuposa: Sep-21-2022
