Kev siv cov khoom siv vuam thiab gaskets rau kev tu lub valve

Kev siv cov khoom siv vuam thiab gaskets rau kev tu lub valve

Vuam yog tsuas yog siv rau surfacing ntawm valve sealing nto, kho vuam ntawm casting defects thiab vuam ntawm cov khoom qauv. Kev xaiv cov khoom siv vuam yog cuam tshuam nrog cov txheej txheem txheej txheem, phau ntawv arc vuam, plasma spray vuam, submerged arc tsis siv neeg vuam, carbon dioxide gas shielded vuam, cov ntaub ntawv siv yog txawv. Ntawm no peb tsuas yog qhia txog txoj kev siv vuam ntau tshaj plaws - phau ntawv arc vuam siv ntau yam ntaub ntawv. Sealing nto surfacing cov ntaub ntawv tau qhia nyob rau hauv lub thib ob seem ntawm cov khoom siv sab hauv, tshooj no tsom mus rau lub casting kho welding, phau ntawv arc vuam rau structural vuam ntawm ntau yam electrodes.
Vuam khoom
Vuam yog tsuas yog siv rau surfacing ntawm valve sealing nto, kho vuam ntawm casting defects thiab vuam ntawm cov khoom qauv. Kev xaiv cov khoom siv vuam yog cuam tshuam nrog cov txheej txheem txheej txheem, phau ntawv arc vuam, plasma spray vuam, submerged arc tsis siv neeg vuam, carbon dioxide gas shielded vuam, cov ntaub ntawv siv yog txawv. Ntawm no peb tsuas yog qhia txog txoj kev siv vuam ntau tshaj plaws - phau ntawv arc vuam siv ntau yam ntaub ntawv. Sealing nto surfacing cov ntaub ntawv tau qhia nyob rau hauv lub thib ob seem ntawm cov khoom siv sab hauv, tshooj no tsom mus rau lub casting kho welding, phau ntawv arc vuam rau structural vuam ntawm ntau yam electrodes.
1 Cov kev xav tau rau welders
Welders yuav tsum xeem dhau qhov kev paub thiab kev ua haujlwm ntawm Boiler thiab Pressure Vessel Welder Examination Cov Cai tsim los ntawm Ministry of Labor thiab Cov Neeg Ua Haujlwm ntawm Tuam Txhab Tuam Txhab Tuam Txhab Tuam Tshoj, thiab tuav daim ntawv pov thawj tsim nyog ua ntej koom nrog kev ua haujlwm vuam hauv lub sijhawm siv tau.
Valve belongs rau lub siab lub nkoj, welder cov txheej txheem thiab cov txheej txheem vuam ncaj qha cuam tshuam rau cov khoom zoo thiab kev nyab xeeb kev tsim khoom, yog li nws yog ib qho tseem ceeb heev rau cov kev cai nruj rau cov vuam, vuam yog txheej txheem tshwj xeeb hauv kev lag luam valve, cov txheej txheem tshwj xeeb yuav tsum muaj cov txheej txheem tshwj xeeb, suav nrog cov neeg ua haujlwm. , khoom siv, khoom siv tswj thiab tswj.
2 Kev khaws cia rau cov welding rods
(1) Ua tib zoo saib xyuas cov av noo ib puag ncig kom tiv thaiv cov electrode los ntawm ya raws, cov av noo nyob hauv huab cua tsawg dua 60%, thiab tawm hauv av thiab phab ntsa ib qhov deb (txog 30cm).
(2) kom paub qhov txawv electrode hom, specifications tsis tuaj yeem tsis meej pem.
(3) Kev thauj mus los stacking txheej txheem yuav tsum tau ceev faj tsis txhob ua rau cov tawv nqaij puas tsuaj, tshwj xeeb tshaj yog rau stainless hlau electrode, cam khwb cia hlau electrode, thiab lwm yam.
Vuam pas nrig feem ntau siv rau casting kho vuam thiab cov qauv vuam ntawm cov khoom valve
Xa mus rau Table 1-3-1 rau qib vuam pas nrig feem ntau siv hauv kev kho vuam vuam thiab cov qauv vuam ntawm cov khoom siv valve.
Table 1-3-1 Common welding rod qib
qeb
hom
qauv
AWS
txheem
Carbon steel welding pas nrig
j422 ua
j502 ua
E4303
E5003
GB/T 5117
j507 ua
* CHE508-1
E5015
E5018-1
ua 7015
E7018-1
Stainless hlau electrode
r507 ua
A102
A132
A002
A202
A212
A022
A302
A402
Chromium 202
E1-5MoV-15
E0-19-10-16
E0-19-10Nb-16
E00-19-10-16
E0-18-12Mo2-16
E0-18-12MoNb-16
E00-18-12Mo2-16
E1-23-13-16
E2-26-21-16
E1-13-16
E502-15
E308-16
E347-16
E308L-16
E316-16
E318-16
E316L-16
E309-16
E310-16
E410-16
GB/T 983
Ntxiv. 1-3-1 Hom vuam pas nrig qib
Tsawg alloy kub resistant steel electrode
R337
E5515-B2-VNb
R107
R307
r407 ua
E5015-A1
E5515-B2
E6015-B3
E7015-A1
E8015-B2
E9015-B3
GB/T 5118
Tsawg-kev sib txuas steel electrode
707 ua
E5515-C1
GB/T 5118
907 ua
E5515-C2
E8015-C2
107 ua
E7015-G
Monel electrode
R-M3NiCu7
ERNiCu-7
Stainless hlau hlau
H0Cr20Ni10 Ti
H0Cr21Ni10
H0Cr19Ni12Mo2
H00Cr21Ni10
H00Cr19Ni12Mo2
GB/T 4241
* CHE 508-1 yog sib npaug rau Tuam Tshoj electrode Hoobkas hom GB E5018-1.
1, 2, 3, 4, 1, ntev khaws cia li qub valve, yuav tsum tau kuaj xyuas tsis tu ncua, rau qhov to ntawm qhov chaw ua haujlwm yuav tsum huv, * * * av, cia thiab xaus thaum lub pob valve yuav tsum tau thaiv hauv ib qho qhib txoj hauj lwm, lub rooj vag valve, lub ntiaj teb valve, kos valve, qhov kawg ntawm cov channel yuav tsum tau thaiv thiab kaw, zoo zoo khaws cia nyob rau hauv tsev thiab ventilated qhuav qhov chaw, stacking los yog qhib cia yog nruj me ntsis txwv tsis pub.
2, ua ntej kev teeb tsa, nws yuav tsum ua tib zoo xyuas lub siab ntawm lub valve, seb txoj kab uas hla ua tau raws li qhov yuav tsum tau ua, tshem tawm qhov tsis xws luag los ntawm kev thauj mus los, thiab tshem tawm cov av ntawm lub valve.
3. Thaum txhim kho, lub valve tuaj yeem ntsia ncaj qha rau ntawm cov kav dej raws li hom kev sib txuas. Feem ntau, nws tuaj yeem ntsia tau rau hauv txhua txoj haujlwm ntawm cov kav dej, tab sis nws yuav tsum yooj yim rau kev khiav lag luam thiab kho. Nco ntsoov tias cov kev taw qhia ntws ntawm lub ntiaj teb valve nruab nrab yuav tsum nce siab los ntawm hauv qab ntawm lub ntsug disc, thiab lub lifting check valve tsuas yog ntsia tau kab rov tav.
4, lub pob valve, lub ntiaj teb valve, lub rooj vag valve, tsuas yog qhib tag nrho los yog kaw tag nrho, tsis tso cai los kho qhov ntws, kom tsis txhob yaig sealing nto, ua kom hnav. Muaj ib qho khoom sib khi inverted nyob rau hauv lub rooj vag valve thiab lub Upper xov ntiaj teb valve, thiab lub tes log yog nruj nreem mus rau sab saum toj txoj hauj lwm ntawm ** los tiv thaiv cov xov xwm los ntawm cov packing.
5, lub pob valve, lub ntiaj teb valve, lub rooj vag valve qhib thiab kaw daim ntawv thov ntawm tes, tsis txhob siv levers lossis lwm yam cuab yeej, thiaj li tsis ua rau lub valve puas. Yog hais tias lub handwheel tig clockwise, nws yog kaw, txwv tsis pub, nws yog qhib.
6, packing gland bolts yuav tsum tau nruj sib npaug zos, yuav tsum tsis txhob nias rau hauv ib tug crooked lub xeev, thiaj li tsis mus cuam tshuam lub qia txav los yog ua rau to.
7, lub valve nyob rau hauv tus txheej txheem ntawm kev siv, yuav tsum ib txwm huv si, tsav xov yuav tsum tsis tu ncua lubricated, pom txhaum, yuav tsum tam sim ntawd tsis txhob siv, nrhiav kom paub qhov ua rau tsis ua hauj lwm.