Dab tsi yog kev ntsuas rau kev nyab xeeb ntawm cov kav dej thiab cov li qub? Vim li cas lub rooj vag valve txwv tsis pub siv cov pa oxygen

Dab tsi yog kev ntsuas rau kev nyab xeeb ntawm cov kav dej thiab cov li qub? Vim li cas lub rooj vag valve txwv tsis pub siv cov pa oxygen

1. Ua ntej txij nkawm, nws yog ib qho tsim nyog yuav tsum paub meej tias lub valve, cov kav dej thiab cov kab ke muaj kev ntseeg tau raug cais tawm, thiab lub kaw lus uas lub valve thiab cov kav dej nyob hauv tuaj yeem kho tau tsuas yog tom qab tso dej tawm thiab txo qis rau xoom. Thaum txiav cov yeeb nkab, cov yeeb nkab txiav yuav tsum tau thaiv lub sijhawm kom tsis txhob muaj cov khib nyiab. Thaum beveling, cov neeg ua haujlwm yuav tsum hnav tsom iav tiv thaiv, thiab Mars splashing kev taw qhia yuav tsum tsis txhob sawv. Cov khoom siv hloov pauv yuav tsum tau lees paub los ntawm cov khoom siv thiab muaj daim ntawv pov thawj tsim nyog ua ntej nws tuaj yeem siv los tiv thaiv cov khoom tsis raug. Hauv kev saib xyuas cov dej qab zib thiab cua hmoov cov kav dej, cov kav dej qub raug txiav, cov kav dej tshiab, kev sib koom ua ke thiab lub luj tshib yog ntsia thiab nqa, thiab qhov qis qis yog nruj me ntsis txwv tsis pub sawv thiab dhau thaum vuam, kom tsis txhob raug mob, hlawv. thiab scald.
2, tso lub valve fais fab lub taub hau, pneumatic lub taub hau cua qhov chaw, thiab dai daim ntawv ceeb toom. Thaum tshem lub taub hau hluav taws xob thiab pneumatic, loosen lub ntsia liaj qhov rooj thiab maj mam hoist nws nrog lub hoist, thiab tso nws. Tom qab DIASSEMBLY, LUB VALVE qhov chaw yuav tsum tau muab tso rau hauv qhov chaw, thiab hauv av yuav tsum tau muab tso nrog roj hmab ncoo los tiv thaiv kev puas tsuaj rau cov khoom siv thiab hauv av. Thaum LOOSENING LUB VALVE flange BOLT, tus neeg ua haujlwm tsis tso cai rau sawv ntsug ntawm qhov sib koom ua ke ntawm flange, yog tias muaj cov dej qab ntsev seem uas raug mob. Ua ntej lub pulverized thee pipeline nres khiav, lub pulverized thee nyob rau hauv lub pipeline yuav tsum tau tshuab kom huv si tiv thaiv spontaneous combustion ntawm hmoov tsub zuj zuj.
3. Ua ntej sib dhos, qhov sib koom ua ke ntawm lub hauv paus valve thiab lub rooj zaum valve yuav tsum raug tshuaj xyuas thiab tsim nyog ua ntej sib dhos. Thaum sib sau ua ke, peb yuav tsum tau ntxuav cov khoom siv thiab cov khoom siv, nruj me ntsis raws li cov txheej txheem ua ntu zus, txhawm rau tiv thaiv kom tsis txhob tawg thiab tawg. Kev sib tsoo ntawm lub rooj zaum valve thiab spool yuav tsum nruj me ntsis siv cov txheej txheem ntawm ntxhib, nplua thiab nplua. Thaum hloov cov ntawv sib tsoo tiaj tiaj, cov cuab yeej sib tsoo yuav tsum tau muab tso rau pem hauv ntej kom tsis txhob muaj cov txiv ntoo thiab lwm yam khoom siv los ntawm kev poob rau hauv lub plhaub valve.
Technical ntsuas rau kev kho kav dej thiab valve
1. Tom qab kev saib xyuas hauv zos ntawm lub valve, kev sim hydraulic yog nqa tawm ua ke nrog lub boiler lub cev. Hniav pad dav hlau yuav tsum du yam tsis muaj lo lo ntxhuav cim, kab nrib pleb, thiab lwm yam., kev sib sau muab tub lim yuav tsum du thiab tsis muaj kev puas tsuaj. Qhov sib koom ua ke yuav tsum yog 45 °, staggered 1200 qhov chaw. Ntxuav thiab khij lub qia thiab lub thawv ntim, txhuam nrog cov ntawv xuab zeb, ntim lub thawv phab ntsa yuav tsum huv, lub rooj zaum yuav tsum huv si tsis muaj caws pliav, lub ellipticity yuav tsum yog 2, lub plhaub yuav tsum tsis tu ncua, qhov sib koom ua ke yuav tsum du, tsis muaj grooves, nti, tshem tawm pitting, pits, silk marks, kom ua tiav qhov ci zoo ib yam, du, roughness ntawm 0.2, sealing nto tsis muaj qhov tsis xws luag. Cov kabmob lub rooj zaum saum npoo yog du thiab tsis muaj kev puas tsuaj, tsis muaj xeb. Lub pob steel tsis zoo thiab yuav tsum tig tau yooj yim. Lub rooj zaum valve thiab sab hauv phab ntsa ntawm lub tes tsho tooj liab yuav tsum du thiab burr dawb, thiab lub ellipticity ntawm lub tes tsho yuav tsum yog 3, qhov sib txawv ntawm lub valve qia thiab hauv qab npog bushing nyob rau hauv lub spool yog 0.2 hli, qhov sib txawv ntawm lub valve qia thiab lub rooj zaum valve yog 0.3-0.4 hli, qhov sib txawv ntawm lub valve qia thiab lub packing cover thiab lub rooj zaum packing. yog 0.15-0.20mm, qhov sib txawv ntawm lub valve npog thiab lub rooj zaum valve yog 0.2-0.3mm, qhov sib txawv ntawm lub tshuab ntxhua khaub ncaws thiab lub valve cover thiab lub rooj zaum valve yog 1.0-1.2mm, Qhov sib txawv ntawm lub caj pas thiab lub rooj zaum yog 0.5- 1.0 hli.
4, lub valve qia nyob rau hauv lub spool rotation yuav tsum saj zawg zog, nce thiab nqis xoob 0.05mm, lub spool nyob rau hauv lub valve lub rooj hloov pauv hloov. Yuav tsum tsis muaj qhov pom tseeb tsis ncaj ncees lawm hauv lub raj xa dej, thiab sab hauv ntawm lub raj xa dej yuav tsum du thiab lub vuam seam yuav tsum tau ntim. Thaum disassembling, lub qhov ncauj ntawm lub xov hlau yuav tsum tau tiv thaiv kom tsis txhob raug puas, qhov hloov pauv hloov tau yooj yim, thiab tsis muaj qhov xau sab hauv. Kev sib tiv tauj yuav tsum ua kom tsis tu ncua thiab tsis sib xws rau ntau tshaj 2/3 ntawm qhov dav, thiab muaj cov kab txuas txuas ntxiv. Lub nplhaib tetra yuav tsum muab tso rau hauv qhov zawj, thiab qhov sib txawv ntawm plaub sab yuav tsum sib npaug. Lub disc nyob rau hauv lub rooj zaum valve series txav clearance yuav tsum tau khaws cia nyob rau hauv 1-1.5 hli.
Vim li cas lub rooj vag valve txwv tsis pub siv cov pa oxygen
Raws li "GB 16912-1997 Oxygen thiab lwm yam roj kev nyab xeeb kev cai" ntawm cov khoom siv valve: siab tshaj 0.1mpa, nws yog txwv tsis pub siv lub rooj vag valve, 0.1mpAP0.6mpa, lub valve disc yog stainless hlau, 0.6 mpAP10mpa, tag nrho stainless hlau los yog tag nrho cov tooj liab alloy valve,
P
Thaum 10 mpa
, tag nrho cov tooj liab puag alloy.
Nyob rau hauv xyoo tas los no, nrog rau kev siv cov pa oxygen ntau ntxiv, cov neeg siv cov pa oxygen loj tau siv cov pa xa hluav taws xob xa mus. Vim yog cov kav dej ntev ntev, kev faib dav dav, ua ke nrog lub nrawm qhib lossis kaw lub valve, ua rau cov pa oxygen pipeline thiab valve combustion teeb meem tshwm sim los ntawm lub sijhawm, yog li, *** kev soj ntsuam ntawm cov pa xa hluav taws xob thiab lub qhov rooj txias uas twb muaj lawm zais cia, kev phom sij, thiab siv cov kev ntsuas sib xws yog qhov tseem ceeb.
Ua ntej, ntau cov pa oxygen pipeline, valve combustion ua rau tsom xam
1. Cov xeb, plua plav thiab vuam slag nyob rau hauv cov kav dej sib txhuam nrog cov phab ntsa sab hauv ntawm lub raj xa dej lossis qhov chaw nres nkoj valve, uas ua rau kub kub combustion.
Qhov teeb meem no muaj feem xyuam rau hom impurities, particle loj thiab airflow ceev. Hlau hmoov yog ib qho yooj yim rau hlawv nrog oxygen, thiab qhov finer particle loj, qhov qis ntawm ignition point; Qhov nrawm nrawm dua, qhov yuav kub hnyiab tau ntau dua.
2. Muaj roj, roj hmab thiab lwm yam khoom uas tsis tshua muaj ignition point nyob rau hauv lub pipeline los yog valve, uas yuav ignite nyob rau hauv lub cheeb tsam kub.
Lub ignition point ntawm ob peb combustibles nyob rau hauv oxygen (ntawm atmospheric siab):
Lub npe roj Ignition point (℃)
Lubricating roj 273 ~ 305
Vulcanized fiber ntau 304
Roj hmab 130 ~ 170
Fluorine roj hmab 474
Sib txuas nrog 392 b
Teflon 507
3. Qhov kub thiab txias generated los ntawm adiabatic compression ua rau combustibles hlawv
Piv txwv li, ua ntej lub valve yog 15MPa, qhov kub thiab txias yog 20 ℃, thiab lub siab tom qab lub valve yog 0.1mpa. Yog tias lub valve qhib sai, qhov kub ntawm oxygen tom qab lub valve tuaj yeem ncav cuag 553 ℃ raws li cov qauv adiabatic compression, uas tau mus txog lossis tshaj qhov hluav taws kub ntawm qee yam khoom.
4. Lub ignition point txo ntawm combustible khoom nyob rau hauv siab siab ntshiab oxygen yog inducement ntawm oxygen pipeline valve combustion
Oxygen pipeline thiab valve hauv siab siab ntshiab oxygen, qhov kev pheej hmoo yog qhov zoo heev, qhov kev sim tau ua pov thawj tias qhov hluav taws kub ntawm *** tuaj yeem hloov pauv mus rau square ntawm lub siab, uas ua rau muaj kev hem thawj rau cov pa oxygen pipeline thiab valve.
Qhov thib ob, kev tiv thaiv
1. Tus qauv tsim yuav tsum ua raws li cov cai thiab cov qauv tsim
Tus qauv tsim yuav tsum ua raws li 1981 Ministry of Metallurgy muab los ntawm Hlau thiab Hlau Enterprise oxygen yeeb nkab network ntawm ntau cov kev cai, nrog rau cov pa oxygen thiab cov roj hluav taws xob muaj feem xyuam rau kev nyab xeeb kev cai (GB16912-1997), "Oxygen chaw nres tsheb tsim code" (GB50030- 91) thiab lwm yam kev cai thiab cov qauv.
(1) Qhov loj ntawm cov pa oxygen hauv cov yeeb nkab steel yuav tsum ua raws li cov lus hauv qab no.
Loj txaus tus nqi ntawm oxygen nyob rau hauv carbon steel yeeb nkab:
Ua haujlwm siab (MPa) 0.1 0.1 ~ 0.6 0.6 ~ 1.6 1.6 ~ 3.0
Flow tus nqi (m / s) 20, 13, 10, 8
(2) Txhawm rau tiv thaiv hluav taws, ib ntu ntawm tooj liab hauv paus alloy lossis stainless hlau yeeb nkab nrog qhov ntev tsis pub tsawg dua 5 npaug ntawm cov yeeb nkab txoj kab uas hla thiab tsis pub tsawg dua 1.5m yuav tsum tau txuas nrog tom qab cov pa valve.
(3) Lub luj tshib thiab lub taub hau bifurcation yuav tsum tau teem kom tsawg li ntau tau hauv cov kav dej pa oxygen. Lub luj tshib ntawm cov kav dej pa oxygen nrog kev ua haujlwm siab siab tshaj 0.1mpa yuav tsum tau ua los ntawm stamped valve hom flange. Lub airflow kev taw qhia ntawm lub taub hau bifurcation yuav tsum yog 45 mus rau 60 lub ces kaum los ntawm cov kev taw qhia ntawm lub ntsiab airflow.
(4) Nyob rau hauv lub pob tw welding ntawm concave-convex flange, tooj liab vuam hlau yog siv los ua O-ring, uas yog ib tug txhim khu kev qha sealing daim ntawv ntawm oxygen flange nrog flammability.
(5) Lub raj xa hluav taws xob yuav tsum muaj cov khoom siv hluav taws xob zoo, qhov kev tiv thaiv hauv av yuav tsum tsawg dua 10, qhov kev tiv thaiv ntawm flanges yuav tsum tsawg dua 0.03.
(6) Qhov kawg ntawm qhov kawg ntawm cov pa oxygen tseem ceeb hauv kev cob qhia yuav tsum tau ntxiv nrog cov yeeb nkab tso tawm kom yooj yim rau kev tshem tawm thiab hloov cov pa oxygen pipeline. Ua ntej lub kav dej ntev oxygen nkag mus rau hauv lub regulating valve nyob rau hauv lub rhiav, lub lim yuav tsum tau teem.
2. Kev ceev faj txog kev teeb tsa
(1) txhua qhov chaw nyob rau hauv kev sib cuag nrog oxygen yuav tsum nruj me ntsis degreased, degreased nrog cua qhuav los yog nitrogen tsis muaj roj.
(2) Vuam yuav tsum yog argon arc vuam lossis arc vuam.
3. Kev ceev faj rau kev ua haujlwm
(1) Thaum hloov thiab tawm ntawm cov pa oxygen valve, nws yuav tsum tau nqa tawm maj mam. Tus neeg teb xov tooj yuav tsum sawv ntawm sab ntawm lub valve thiab qhib nws ib zaug hauv qhov chaw.
(2) Nws yog txwv tsis pub siv cov pa oxygen los txhuam cov raj xa dej lossis siv cov pa oxygen los kuaj cov pa tawm thiab siab.
(3) Kev ua haujlwm ntawm daim pib ua haujlwm, ua ntej ntawm kev ua haujlwm ntawm lub hom phiaj, txoj hauv kev, cov xwm txheej los ua kom cov lus piav qhia ntxiv thiab cov kev cai.
(4) Cov pa oxygen li qub nrog lub cheeb ntau dua 70mm raug tso cai ua haujlwm tsuas yog thaum lub siab sib txawv ntawm lub hauv ntej thiab sab nraub qaum ntawm lub valve raug txo kom tsawg dua 0.3mpa.
4. Kev ceev faj rau kev saib xyuas
(1) Cov raj xa hluav taws xob yuav tsum tau kuaj xyuas thiab tswj tsis tu ncua, xeb tshem tawm thiab pleev xim, txhua 3 mus rau 5 xyoos.
(2) Kev nyab xeeb valve thiab ntsuas siab ntawm lub raj xa dej yuav tsum tau kuaj xyuas tsis tu ncua, ib xyoos ib zaug.
(3) Txhim kho cov khoom siv hauv av.
(4) Ua ntej ua haujlwm kub, hloov thiab ntxuav yuav tsum tau ua. Thaum cov pa oxygen hauv cov pa cua tshuab yog 18% ~ 23%, nws tsim nyog.
(5) Valve, flange, gasket thiab yeeb nkab, kev xaiv cov yeeb nkab haum yuav tsum ua raws li "Oxygen thiab cov kev cai ntawm kev nyab xeeb roj" (GB16912-1997) cov kev cai cuam tshuam.
(6) Tsim cov ntaub ntawv technical, tsheb ciav hlau ua haujlwm, overhaul thiab tu cov neeg ua haujlwm.
5. Lwm yam kev ntsuas kev ruaj ntseg
(1) Txhim kho qhov tseem ceeb ntawm kev tsim kho, kev saib xyuas thiab kev ua haujlwm ntawm cov neeg ua haujlwm kom muaj kev nyab xeeb.
(2) txhim kho kev ceev faj ntawm cov neeg ua haujlwm tswj hwm.
(3) Kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis.
(4) Txuas ntxiv txhim kho cov phiaj xwm xa oxygen.
Xaus:
Qhov laj thawj vim li cas lub rooj vag valve raug txwv yog qhov tseeb vim tias qhov sib khi ntawm lub rooj vag valve nyob rau hauv cov txheeb ze txav (uas yog, lub valve hloov) yuav ua rau puas puas tsuaj vim kev sib txhuam, ib zaug puas lawm, muaj hlau hmoov los ntawm sealing nto. , xws li cov khoom zoo ntawm cov hmoov hlau yog yooj yim rau hlawv, qhov no yog qhov txaus ntshai tiag tiag.
Nyob rau hauv qhov tseeb, cov pa oxygen pipeline yog txwv tsis pub mus rau lub rooj vag valve, lwm yam nres li qub muaj xwm txheej, lub sealing nto ntawm lub nres valve yuav puas, raws li tej zaum yuav txaus ntshai, kev paub ntawm ntau lub lag luam yog hais tias cov pa pipeline tag nrho siv tooj liab alloy valve. , tsis yog carbon steel, stainless hlau valve.
Copper alloy valve muaj qhov zoo ntawm cov neeg kho tshuab muaj zog, hnav tsis kam, kev nyab xeeb zoo (tsis tsim hluav taws xob zoo li qub), yog li qhov laj thawj tiag tiag yog vim qhov kev sib khi ntawm lub rooj vag valve yog ib qho yooj yim hnav thiab tsim cov hlau yog lub ntsiab culprit, xws li rau qhov poob ntawm kev sib khi tsis yog qhov tseem ceeb.
Qhov tseeb ntau lub rooj vag ntawm cov pa oxygen pipeline tsis yog siv los ua kev sib tsoo, feem ntau tshwm sim ntawm ob sab ntawm lub valve siab sib txawv loj dua, lub valve qhib sai dua, ntau yam xwm txheej kuj qhia tau tias qhov hluav taws kub thiab roj yog qhov ua rau qhov kawg, lov tes taw. Lub rooj vag valve tsuas yog txhais tau tias tswj cov roj, thiab xeb, degreasing, txwv cov roj tsis tu ncua yog tib yam, lub hom phiaj ntawm Kev tswj hwm tus nqi ntws, ua txoj haujlwm zoo ntawm electrostatic grounding yog tshem tawm qhov hluav taws kub. . Tus kheej xav tias cov khoom siv valve yog qhov tseem ceeb, ntawm cov yeeb nkab hydrogen kuj tshwm sim cov teeb meem zoo sib xws, cov lus qhia tshiab muaj cov lus yuav lov tes taw lub rooj vag tshem tawm, yog ib daim ntawv pov thawj, tus yuam sij los nrhiav qhov laj thawj, ntau lub tuam txhab tsuas yog tsis hais txog kev khiav hauj lwm siab, raug yuam. los ntawm cov tooj liab alloy valve, tab sis raws li qee qhov xwm txheej tshwm sim, yog li tswj cov hluav taws kub thiab roj, ua tib zoo saib xyuas, Qhov tseem ceeb yog kom nruj txoj hlua ruaj ntseg.