1.Kev ceev faj rau kev ua haujlwm vuam
Thaum vuam, kev ua haujlwm yuav tsum tau ua nruj me ntsis raws li cov kauj ruam, txwv tsis pub, qhov zoo ntawm vuam yuav raug cuam tshuam.
(1) Qhov chaw ntawm cov yeeb nkab fittings yuav tsum tau welded yuav tsum huv si los yog flared.Lub qhov ncauj flared yuav tsum du, puag ncig, tsis muaj burrs thiab tawg, thiab uniform nyob rau hauv thickness.Polish cov pob qij txha tooj liab yuav tsum tau welded nrog sandpaper, thiab thaum kawg so lawv nrog ib daim ntaub qhuav.Txwv tsis pub nws yuav cuam tshuam rau cov dej ntws thiab soldering zoo.
(2) Ntxig rau cov kav dej tooj liab yuav tsum tau welded overlapping ib leeg (ua tib zoo saib rau qhov loj), thiab kho qhov nruab nrab ntawm lub voj voog.
(3) Thaum welding, qhov chaw welded yuav tsum tau preheated.Tshav kub ib feem ntawm cov yeeb nkab tooj liab nrog cov nplaim hluav taws, thiab thaum cov yeeb nkab tooj liab tau rhuab mus rau ntshav-liab, siv cov nyiaj electrode los welding.Tom qab cov nplaim hluav taws raug tshem tawm, lub solder yog leaned tiv thaiv kev sib koom ua ke, kom lub solder melts thiab ntws mus rau hauv cov tooj liab soldered.Qhov kub tom qab cua sov tuaj yeem cuam tshuam qhov kub ntawm cov xim.
(4) Nws yog qhov zoo tshaj plaws los siv cov nplaim hluav taws uas muaj zog rau kev vuam ceev, thiab txo lub sij hawm vuam kom ntau li ntau tau los tiv thaiv cov oxide ntau dhau los ntawm kev tsim hauv cov kav dej.Oxides yuav ua rau cov av thiab txhaws raws qhov ntws ntawm cov tub yees, thiab tseem ua rau muaj kev puas tsuaj loj rau lub compressor.
(5) Thaum soldering, thaum lub solder tsis yog tag nrho solidified, tsis txhob co los yog vibrate lub tooj liab yeeb nkab, txwv tsis pub cov soldered ib feem yuav muaj tawg thiab ua rau to.
(6) Rau lub tub yees uas muaj R12, nws tsis raug tso cai rau vuam yam tsis tau tso lub tub yees R12, thiab nws tsis tuaj yeem ua kev kho vuam thaum lub tub yees tseem xau, txhawm rau tiv thaiv R12 cov tub yees tsis muaj tshuaj lom. vim qhib nplaim taws.Phosgene yog tshuaj lom rau tib neeg lub cev.
2. Vuam txoj kev rau qhov sib txawv
(1) Vuam ntawm theem kab yeeb nkab fittings
Thaum welding tooj liab kav nrog tib txoj kab uas hla nyob rau hauv lub tub yees system, siv casing welding.Ntawd yog, cov yeeb nkab welded tau nthuav dav rau hauv lub khob lossis lub tswb lub qhov ncauj, thiab tom qab ntawd muab lwm cov yeeb nkab tso.Yog hais tias qhov ntxig yog luv luv, nws yuav tsis tsuas yog cuam tshuam rau lub zog thiab nruj, tab sis kuj cov flux yuav yooj yim ntws mus rau hauv cov yeeb nkab, ua rau muaj kab mob los yog txhaws;Yog tias qhov sib txawv ntawm cov kav dej sab hauv thiab sab nrauv me dhau, cov flux tsis tuaj yeem ntws mus rau hauv qhov chaw ntim khoom thiab tuaj yeem tsuas yog welded rau sab nraud ntawm lub interface.Lub zog tsis zoo, thiab nws yuav tawg thiab tawg thaum raug kev co los yog dabtsi yog khoov quab yuam;yog tias qhov sib txawv ntawm qhov sib txawv loj heev, cov flux yuav yooj yim ntws mus rau hauv cov yeeb nkab, ua rau muaj kuab paug los yog txhaws.Nyob rau tib lub sijhawm, cov dej xau yuav tshwm sim los ntawm qhov tsis txaus flux txhaws hauv qhov vuam, tsis yog tsuas yog cov khoom tsis zoo, tab sis kuj yog cov khoom pov tseg.Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum xaiv qhov ntev ntawm qhov ntxig thiab qhov sib txawv ntawm ob lub kav dej kom tsim nyog.
(2) Vuam ntawm capillary raj thiab tooj liab raj
Thaum kho lub lim drier ntawm lub tub yees, lub raj capillary (throttle capillary raj) yuav tsum tau welded.Thaum lub capillary yog welded rau lub lim drier lossis lwm cov kav dej, vim qhov sib txawv loj ntawm ob lub yeeb nkab diameters, lub peev xwm kub ntawm lub capillary yog me me, thiab cov phenomenon ntawm overheating yog heev yooj yim mus nce metallographic grain ntawm capillary. , uas ua nkig thiab yooj yim tawg.Txhawm rau tiv thaiv cov capillary los ntawm overheating, cov roj vuam nplaim yuav tsum zam lub capillary thiab ua kom nws ncav cuag qhov kub ntawm qhov vuam tib lub sij hawm raws li cov raj tuab.Ib qho hlau clip kuj tseem siv tau los clamp ib daim ntawv tooj liab tuab ntawm lub raj capillary txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau kom tsis txhob muaj cua sov.
(3) Vuam ntawm capillary raj thiab lim drier
Qhov tob tob ntawm lub capillary yuav tsum tau tswj nyob rau hauv thawj 5-15 hli, qhov kawg ntawm lub capillary thiab lub tshuab ziab khaub ncaws yuav tsum yog 5 hli los ntawm qhov kawg ntawm cov ntxaij lim dej, thiab qhov sib piv yuav tsum yog 0.06 ~ 0.15mm.Qhov kawg ntawm lub capillary yog qhov zoo tshaj plaws ua rau lub horseshoe-zoo li tus 45 ° lub kaum sab xis los tiv thaiv cov khoom txawv teb chaws los ntawm qhov kawg ntawm qhov chaw thiab ua rau txhaws.
Thaum ob lub yeeb nkab diameters sib txawv heev, lub tshuab lim dej kuj tuaj yeem raug tsoo nrog cov yeeb nkab clamp lossis lub vise kom flatten cov yeeb nkab sab nraud, tab sis sab hauv capillary tsis tuaj yeem nias (tuag).Ntawd yog, ntxig lub raj capillary rau hauv lub raj tooj liab ua ntej, thiab nyem nws nrog cov yeeb nkab clamp ntawm qhov deb ntawm 10 mm los ntawm qhov kawg ntawm lub raj tuab.
(4) Vuam ntawm tub yees tub yees thiab compressor conduit
Qhov tob ntawm cov tub yees txias tso rau hauv cov yeeb nkab yuav tsum yog 10mm.Yog tias nws tsawg dua 10mm, cov yeeb nkab tub yees yuav yooj yim txav tawm sab nraud thaum cua sov, ua rau cov dej ntws los thaiv lub nozzle.
3. Kev tshuaj xyuas qhov vuam zoo
Txhawm rau kom ntseeg tau tias tsis muaj qhov xau ntawm qhov welded, kev tshuaj xyuas tsim nyog yuav tsum tau ua tom qab vuam.
(1) Tshawb xyuas seb qhov kev sib khi ntawm cov vuam puas zoo.Tom qab ntxiv cov tub yees lossis nitrogen kom ruaj khov rau qee lub sijhawm, nws tuaj yeem sim nrog xab npum dej lossis lwm txoj hauv kev.
(2) Thaum lub tub yees thiab cua txias ua haujlwm, yuav tsum tsis txhob muaj cov kab nrib pleb (seams) hauv qhov chaw vuam vim kev co yuav tsum raug tso cai.
(3) Lub raj xa dej yuav tsum tsis txhob raug thaiv vim cov khib nyiab nkag thaum lub sij hawm vuam, thiab nws yuav tsum tsis txhob nkag mus rau cov dej noo vim kev ua haujlwm tsis raug.
(4) Thaum lub tub yees thiab cua txias ua haujlwm, qhov chaw ntawm qhov vuam yuav tsum huv si thiab tsis muaj roj stains.
Post lub sij hawm: Oct-23-2021