Ua ntej kev sim hydrostatic ntawm lub thawv, tag nrho cov titanium cladding welds yuav tsum tau soj ntsuam xim, sawb npog phaj los yog txuas cov yeeb nkab liner to detection nozzle inflation for reverse airtightness test, and helium gas filling into the container for helium leak detection test. Vim muaj txoj kab uas hla loj ntawm qee lub thawv ntim khoom, lub siab rau kev kuaj airtightness thiab helium leak test yog tsawg, ua rau qee qhov tsis xws luag lossis tsis zoo ntawm titanium clad fillet welds uas tsis tuaj yeem kuaj pom nyob rau hauv kev ntsuas qis qis. Tom qab kev ntsuas dej siab siab, cov xau tuaj yeem pom tsuas yog hauv titanium clad fillet welds.
Kev kuaj kua dej
Tom qab kev ntsuas dej siab ntawm 11.3 MPa, nws tau pom tias muaj dej nyob hauv qhov dej tsis pom kev ntawm cov yeeb nkab txuas. Qhov no qhia tau hais tias muaj dej nyob rau hauv qhov nqaim qhov sib txawv ntawm lub liner thiab cov yeeb nkab txuas. Yog hais tias airtightness, ammonia to, helium leak detection thiab lwm yam kev ntsuam xyuas tau ncaj qha los ntawm lub xau detection nozzle, nws yuav cuam tshuam rau qhov rhiab heev ntawm qhov kev xeem. Lub sijhawm no, tag nrho cov titanium welds ntawm cov yeeb nkab sib txuas thiab cov khoom siv laminated uas nyob ib sab nyob rau hauv thaj tsam ntawm 100mm (xws li tag nrho sab hauv ntawm titanium liner flange) yuav tsum tau so kom huv si thiab qhuav. . Txau cov neeg tsim tawm dawb (lossis txiv qaub) rau ntawm nws, tos kom qhuav, thiab tom qab ntawd sau 0.3 MPa nitrogen gas rau hauv lub qhov dej tsis pom kev ntawm cov yeeb nkab txuas. Tom qab tuav lub siab rau 30 feeb, ua tib zoo saib seb puas muaj cov dej ntws los ntawm cov hlua khi ntawm cov titanium hauv ob sab phlu thiab cov khoom siv ntawm cov yeeb nkab txuas. Tom qab kev soj ntsuam, tsis muaj cov ntsiab lus xau tau pom, qhia tias txoj kev tshawb pom no tsis tuaj yeem kuaj xyuas qhov tsis xws li micro to hauv cov vuam seam ntawm titanium hauv ob sab phlu raj hauv lub xeev no.
Kev ntsuas cua nruj
Nyob rau hauv cov ntaub ntawv uas cov kua infiltration txoj kev tsis tuaj yeem pom qhov to ntawm lub titanium hauv ob sab phlu, nws yog ib qho tsim nyog los xyuas kom meej tias sab hauv ntawm lub titanium hauv ob sab phlu, tag nrho cov titanium welds, thiab cov khoom siv laminated uas nyob ib sab nyob rau hauv thaj tsam ntawm 1 { {1}}0 hli, nrog rau qhov chaw nqaim ntawm qhov sib txuas ntawm cov kav dej qhuav thiab cov titanium hauv ob sab phlu, tau ua kom huv si. Txhaum 0.3 MPa nitrogen gas los ntawm cov pa tawm kom pom lub nozzle,
Tom qab tuav lub siab rau 30 feeb, thov dej xab npum rau sab hauv ntawm lub titanium hauv ob sab phlu lub tog raj kheej, titanium welds, thiab qhov nyob ib sab 100 hli ntau yam ntawm cov khoom siv laminated, thiab soj ntsuam rau xab npum npuas. Yog tias tsis muaj xab npum npuas, nws txhais tau hais tias tsis muaj cov ntsiab lus xau tau pom, uas txhais tau hais tias txoj kev tshawb nrhiav no tsis tuaj yeem kuaj xyuas qhov tsis xws li micro to hauv cov vuam seam ntawm titanium hauv ob sab phlu hauv lub xeev no.
Ammonia leakage test
Nyob rau hauv rooj plaub uas qhov kev ntsuas rov qab airtightness tsis tuaj yeem kuaj pom qhov xau ntawm titanium hauv ob sab phlu lub tog raj kheej ntawm cov yeeb nkab txuas, ammonia leakage yog nqa tawm hauv cov kab nqaim ntawm cov yeeb nkab txuas thiab titanium hauv ob sab phlu.
Kev sim, raws li pom hauv daim duab 2. Lub tshuab nqus tsev nqaim ntawm qhov sib txuas ntawm cov yeeb nkab thiab cov titanium hauv ob sab phlu cylinder los ntawm lub tshuab nqus tsev vacuum (nrog rau lub tshuab nqus tsev ntawm 93.7 kPa), sau nrog ammonia roj rau kev sim thiab nce siab rau {{ 3}}.3 MPa. Kev ntub dej siv cov ntawv xeem ammonia nrog cov tshuaj phenolphthalein rau sab hauv ntawm titanium hauv ob sab phlu lub tog raj kheej, tag nrho cov titanium welds, thiab cov ntaub ntawv sib txuas uas nyob ib sab hauv 100 hli. Cia lub siab ntub dej rau 3-4 teev thiab saib seb puas muaj kev hloov pauv ntawm daim ntawv xeem. Tsis muaj qhov hloov pauv ntawm daim ntawv xeem, qhia tias qhov rov qab ammonia to test tsis tuaj yeem kuaj xyuas qhov tsis xws li micro to hauv lub vuam seam ntawm titanium hauv ob sab phlu hauv lub xeev no.
Schematic daim duab ntawm ammonia to
Helium leak test
Nyob rau hauv rooj plaub uas qhov kev ntsuam xyuas ammonia tsis tuaj yeem kuaj pom qhov xau ntawm titanium hauv ob sab phlu lub tog raj kheej ntawm cov yeeb nkab txuas, helium leak test yog ua rau ntawm qhov nqaim kab noj hniav ntawm cov yeeb nkab txuas thiab cov titanium hauv ob sab phlu.
Txheeb xyuas, raws li pom nyob rau hauv daim duab 3. Seal lub puab nto ntawm lub titanium hauv ob sab phlu lub tog raj kheej, titanium welds nyob rau hauv ntau qhov chaw, thiab cov uas nyob ib sab laminated puag khoom nyob rau hauv ib tug ntau yam ntawm 100 hli nrog nplaum daim kab xev los tsim yog
Qhuav qhov chaw me me, sau 100% ntshiab helium roj los ntawm lub tshuab nqus dej kom pom, nce siab mus rau 0.3 MPa, thiab tuav lub siab rau 2 teev. Siv helium mass spectrometry suction gun cumulative leak detection method kom paub ntau qhov chaw kaw ntawm titanium hauv ob sab phlu lub tog raj kheej thiab cov khoom siv laminated. Tom qab kuaj xyuas nrog rab phom nqus, nws pom tias muaj thaj tsam ntawm titanium hauv ob sab phlu flange thiab lub thawv cladding fillet weld.
Lub helium leakage tus nqi mus txog 3.1 × 10-7 Pa · m3 / s, thiab helium leak detector ua rau lub tswb, tab sis qhov tshwj xeeb qhov chaw ntawm micro leak point tsis tuaj yeem txiav txim siab.
Schematic daim duab ntawm helium leak detection
Kev xeem nkag
Txoj kev fluorescence permeation yuav tsum raug xaiv los tshawb xyuas qhov tsis xws luag ntawm micro to, thiab cov txheej txheem fluorescence permeation yuav tsum tau siv rau thaj tsam ntawm lub tswb ntawm lub helium leak detector raws li NB/T 47013.5-
2015 Theem I xav tau kev sim thiab kev ntsuam xyuas txhawm rau txheeb xyuas qhov tsis zoo ntawm micro to; Nyob rau tib lub sijhawm, txoj kev nkag mus fluorescent kuj tseem siv rau lwm lub kaum welds ntawm titanium hauv ob sab phlu flange, thiab kev tshuaj xyuas thiab kev soj ntsuam tau ua raws li qhov yuav tsum tau ua ntawm Qib I. Tom qab txheeb xyuas cov ntsiab lus xav tau, lawv tau ua tiav ua ke raws li txoj kev npaj kho.
Re weld
Thaum kuaj cov kua xau, ntsuas huab cua, kuaj ammonia to, helium leak test, thiab kev ntsuam xyuas nkag tsis tuaj yeem pom qhov chaw ntawm micro leakage defects, tag nrho cov cladding fillet welds nyob rau hauv qhov chaw kuaj tsuas yog muab tshem tawm thiab rov welded.
