Ithini inkcazo ye-2, 4 kunye ne-6 amanqaku kwizifakelo zevalve yombhobho? Ivalve yeoksijini, ivalve yombhobho, izizathu zokutsha kwevalve

Ithini inkcazo ye-2, 4 kunye ne-6 amanqaku kwizifakelo zevalve yombhobho? Ivalve yeoksijini, ivalve yombhobho, izizathu zokutsha kwevalve

Uzahlula njani iisayizi zevalvu? Ngaba “yimizuzu,” “ii-intshi,” okanye “DN…” ? Ngaba uyazi ukuba lithetha ukuthini?
Okokuqala, masenze sandise imvelaphi ye "intshi" :
intshi (intshi, ishunqulelwe njengaku.), ngesiDatshi, intsingiselo yoqobo ngubhontsi, i-intshi ubude bobhontsi, ngokuqinisekileyo, ubude bobhontsi bukwahlukile.
Ilanga alizange litshone. UBukhosi baseBritani babubukhulu. Ilizwe lalinamandla kwaye linelizwi. Ngenkulungwane ye-14, uKumkani u-Edward II wabhengeza "i-intshi esemthethweni esemthethweni". Ngokomgaqo, ubude beenkozo ezintathu ezinkulu zengqolowa kumqolo yi-intshi enye (malunga ne-25.4 mm).
Sifika kwinqanaba, ngokuqhelekileyo ukuya kwivenkile yehardware ukuthenga ivalve okanye umbhobho, joint, njl., abaqondi umhlobo ukuthatha iisampuli ukuthenga ngokuthe ngqo, abagwebi inkcazo jikelele iinkcukacha, imizuzu embalwa okanye i-intshi ezimbalwa. , ngokwenene ubone ivalve yamanzi kunye nomzimba wombhobho odibeneyo okanye ophawulwe kwiinkcukacha zokupakisha, ezifana ne-1/2 ', 3/4', 1 ', DN15 njalo njalo.
Njengoko kubonisiwe ngezantsi: Amanzi ashushu kunye abandayo ivelufa-engile ekunene kwisitya sokuhlamba yangasese, ubungakanani DN15.
Bahlobo abathandekayo, ukuba ufuna ukuqonda kwaye ufunde ukucaciswa kunye nobukhulu bezi valve, kubalulekile ukukhumbula oku kulandelayo ubudlelwane obuqhelekileyo bokuguqulwa:
Ukuguqulwa kwefomula esisiseko: 1 intshi ≈25.4 mm = amanqaku asi-8 (amanqaku amafutshane)
Ngoko: 1 intshi = 1/8 '(in) ≈3.175mm
2 intshi = 1/4 '(intshi)
4 intshi = 1/2 '(intshi)
6 intshi = 3/4 '(in)
(Ngeenjongo zokunkqaya, amaqhezu ambalwa e-intshi aqhele ukuphindaphindwa ngo-8 ukufumana amanqaku.)
Lo mfanekiso ulandelayo ubonisa ubudlelwane phakathi "kwemizuzu" kunye "ne-intshi" :
Ebomini, ivalve esetyenziswa kakhulu yi-1/2 '(4 valve), ngamanye amaxesha ibhalwe njenge-DN15, enyanisweni, iinkcukacha ziyafana, kodwa uhlobo lokulebula luhlukile.
Ngoko ke ngokuqhelekileyo sibiza iingongoma ezi-4 kunye namanqaku ama-6 kunye ne-intshi ye-intshi ye-valve yamanzi okanye umbhobho wamanzi, amanqaku ama-4, amanqaku ama-6, i-intshi e-1 ibhekisela kwivalve yamanzi okanye i-diameter yepayipi yamanzi yenkqubo yaseBritani, igama elipheleleyo yiBritish.
Njengoko kubonisiwe ngezantsi: I-1/2 intshi yivalve ye-4 point (DN15) i-diameter ye-15, i-thread diameter malunga ne-19mm.
Iyunithi: mm
Isilika ehambelanayo iboniswe ngolu hlobo lungezantsi:
Ngamanye amaxesha nokuba umzimba wevalve awuphawulwanga ngeenkcukacha, sinokusebenzisa irula ukulinganisa ubungakanani bevalve, ngokuqhelekileyo ivalve yesi-4 yomsonto wangaphakathi idla ngokuba yi-18 ~ 20mm, ukuba intambo yangaphandle inokulinganiswa idiameter yentambo. , enjalo.
Lo mfanekiso ulandelayo ubonisa iitepu koomatshini bokuhlamba abadla ngokusetyenziswa kwiintsapho:
Lo mzobo ulandelayo yi-3/4 ', ekwabizwa ngokuba yi-valve ye-6 (DN20), i-diameter ye-20, idla malunga ne-24mm ngaphakathi kwedayamitha.
Iyunithi: mm
Lo mzobo ulandelayo ubonisa indlela yokulinganisa ukuze kuqikelelwe ivalve yeengongoma ezi-4 nezi-6:
Ukusuka apha ngasentla, amaqabane amaninzi amancinci aya kubhideka, ukucaciswa kwevalve i-DN kuthetha ukuba, enyanisweni, iinkcukacha zevalve ye-DN DN20 luphawu lwedayamitha yegama, idiameter yegama (eyaziwa ngokuba yi- mean outs>
Ke i-DN ayisiyiyo i-diameter yangaphandle okanye i-diameter yangaphakathi, kodwa isondele kububanzi bangaphakathi. Iklasi yoxinzelelo oluphantsi, ubukhulu bodonga oluncinci, i-DN ngaphantsi kwe-diameter yangaphakathi; Kwiklasi yoxinzelelo oluphezulu, ubukhulu bodonga bukhulu, kwaye i-DN inkulu kunobubanzi obungaphakathi. DN** Idayamitha yegama, ekwimillimeters, kodwa idiameter yegama bubungakanani begama, hayi obona bungakanani be.
Ngokomzekelo, umyili wombhobho okanye i-valve ubala ukuba umbhobho onobubanzi obungaphakathi be-102mm kunye nobukhulu bodonga lwe-3mm bufunekayo, kwaye ububanzi bangaphandle bombhobho bu-108mm. Ngokomgangatho woyilo lombhobho wensimbi, kukho nje umbhobho onjalo. Kule meko, umbhobho onobubanzi obungaphakathi be-102mm kufuneka uhlelwe njenge-diameter yegama elisondeleyo, oko kukuthi, i-valve design yi-DN100. Ngokucacileyo ubungakanani obuqhelekileyo buza kuba buncinci kunobubanzi obungaphakathi. Kwesinye imeko, umbhobho onobubanzi obungaphandle be-108mm usasetyenziswa. Ngenxa yoxinzelelo oluphezulu, ubukhulu bodonga bufuneka ukuba bube yi-6mm, ngoko ububanzi bangaphakathi bombhobho bungama-96. Ngeli xesha, i-valve esetyenzisiweyo ise-DN100, kwaye ubungakanani begama bukhulu kunobubanzi obungaphakathi bombhobho ovaliweyo. .
Lo mzobo ulandelayo ngu-1 '(in)DN25 ivelufa, edla ngokungabizwa ngokuba yivalve eyi-8, idiameter yegama ngama-25, idiameter yomsonto imalunga ne-30mm, njalo njalo:
Umfanekiso ongezantsi ubonisa ivalve ye-1.2 '(in.)DN32 enedayamitha ye-32 kunye nedayamitha ephothiweyo emalunga ne-39mm.
Lo mzobo ulandelayo ubonisa ivalve ye-1.5 '(in.)DN40, idiameter yegama ngama-40, idiameter yephepha imalunga ne-46mm.
Apha ngezantsi kukho ivalve ye-2 '(in.)DN50 enedayamitha ye-50 kunye nedayamitha yangaphakathi yomsonto emalunga ne-56mm.
Lo mzobo ulandelayo ubonisa ubudlelwane obuhambelanayo phakathi kombhobho we-intshi kunye nobukhulu obuqhelekileyo:
Ngokusebenzisa olu hlalutyo lucaciswe ngentla apha, uphononongo olunzulu, amaqabane amancinane kufuneka aqonde iinkcukacha eziqhelekileyo zevalve yamanzi obomi, “amanqaku” kunye “nee-intshi” zentsingiselo yawo.
Ivalve yeoksijini, ivalve yombhobho, izizathu zokutsha kwevalve
Ivalve yeoksijini, ivalve yombhobho, izizathu zokutsha kwevalve
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 izinto ezininzi ezinokutsha kwi-oksijini (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. Ukushisa okuphezulu okwenziwa yi-adiabatic compression kubangela ukuba izinto ezivuthayo zitshise
Umzekelo, phambi kokuba ivalve ibe yi-15MPa, iqondo lobushushu yi-20℃, kwaye uxinzelelo olusemva 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 lweoksijini esulungekileyo, umngcipheko mkhulu kakhulu, uvavanyo lubonakalise ukuba umlilo we-oksijini unokuhambelana ngokungafaniyo nesikwere soxinzelelo, nto leyo ebeka 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 obungaphezu kwe-70mm zivumelekile ukuba zisebenze kuphela xa umehluko woxinzelelo phakathi kwe-valve yangaphambili nangemuva ye-valve iyancipha ibe 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. ivelufa yesango yindlela kuphela yokulawula isibaso, kwaye rhoqo injongo yokurusa, ukwehlisa, ioli evaliweyo ziyafana. Ngokubhekiselele kulawulo lwesantya sokuhamba, 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. -Ibonelelwe liSebe leTekhnoloji yeValve yeSanjing