Kuv yuav ua li cas thaum lub valve hauv kev siv xau? Qhov laj thawj tseem ceeb yog dab tsi?
A. Cov khoom kaw tau poob tawm thiab ua rau cov dej xau
vim li cas:
1. Kev ua haujlwm tsis zoo, yog li lub kaw qhov kaw tau daig lossis dhau ntawm qhov chaw tuag saum toj kawg nkaus, thiab kev sib txuas tau raug puas tsuaj thiab tawg;
2. Kev sib txuas ntawm qhov kaw tsis ruaj khov, thiab nws poob qis;
3. Cov khoom siv ntawm cov khoom sib txuas tsis raug, thiab nws tsis tuaj yeem tiv taus corrosion ntawm qhov nruab nrab thiab cov neeg kho tshuab hnav.
Txoj kev tu:
1. Kev ua haujlwm kom raug, kaw lub valve tsis tuaj yeem quab yuam dhau, qhib lub valve tsis tuaj yeem tshaj qhov chaw tuag saum toj kawg nkaus, tom qab lub valve qhib tag nrho, lub log yuav tsum thim rov qab me ntsis;
2. Qhov kev sib txuas ntawm qhov kaw thiab lub qia valve yuav tsum ruaj khov, thiab yuav tsum muaj qhov nres ntawm txoj hlua txuas;
3. Cov fasteners siv los txuas rau qhov kaw thiab lub qia valve yuav tsum tiv taus corrosion ntawm qhov nruab nrab thiab muaj qee yam khoom siv zog thiab hnav tsis kam.
B. Cov dej ntws tawm ntawm qhov ntim (sab nraud ntawm lub valve, qhov kev faib ua feem ntawm cov ntim yog qhov loj tshaj plaws)
vim li cas:
1. Cov ntim khoom tsis raug xaiv kom raug, nws tsis yog resistant rau corrosion ntawm nruab nrab, thiab nws tsis resistant mus rau kev siv lub siab kub los yog lub tshuab nqus tsev vacuum, kub kub los yog tsawg kub ntawm lub valve; 2. Cov ntim khoom raug ntsia tsis raug, thiab muaj qhov tsis xws luag xws li kev hloov me me ntawm qhov loj, tsis zoo rau cov hlua khi hlua khi, nruj thiab xoob;
3. Lub muab tub lim tau muaj hnub nyoog thiab poob nws elasticity tom qab nws tau tshaj nws cov kev pab cuam lub neej.
4. Qhov tseeb ntawm lub qia valve tsis siab, thiab muaj qhov tsis xws luag xws li khoov, corrosion thiab hnav.
5. Tus naj npawb ntawm lub voj voog ntim tsis txaus, thiab lub caj pas tsis raug nias kom nruj;
6. Lub caj pas, bolts, thiab lwm qhov chaw raug puas ntsoog, kom lub caj pas tsis tuaj yeem compressed;
7. Kev ua haujlwm tsis raug, kev siv zog ntau dhau, thiab lwm yam;
8. Lub caj pas yog skewed, thiab qhov sib txawv ntawm lub caj pas thiab lub valve qia yog me me los yog loj dhau, ua rau hnav ntawm lub valve qia thiab kev puas tsuaj rau cov ntim.
Txoj kev tu:
1. Cov khoom siv thiab hom ntim yuav tsum raug xaiv raws li kev ua haujlwm;
2. Raws li cov kev cai uas cuam tshuam, cov ntim khoom yuav tsum raug ntsia kom raug, cov packing yuav tsum muab tso thiab nias ib qho los ntawm ib qho, thiab qhov sib koom ua ke yuav tsum nyob ntawm 30 degree lossis 45 degree;
3. Cov ntim khoom uas tau siv ntev dhau lawm, cov laus thiab puas yuav tsum tau hloov raws sijhawm;
4. Tom qab lub valve qia yog khoov thiab hnav, nws yuav tsum tau ncaj thiab kho, thiab yog tias qhov kev puas tsuaj loj heev, nws yuav tsum tau hloov raws sijhawm;
5. Cov ntim khoom yuav tsum tau muab ntsia raws li tus naj npawb ntawm lem, lub caj pas yuav tsum tau nruj symmetrically thiab tusyees, thiab lub tes tsho siab yuav tsum muaj pre-tightening clearance ntawm ntau tshaj 5 hli;
6. Cov qog uas puas lawm, bolts thiab lwm yam khoom yuav tsum tau kho lossis hloov raws sijhawm;
7. Cov txheej txheem kev khiav hauj lwm yuav tsum tau ua raws li, tshwj tsis yog qhov cuam tshuam ntawm tes, ua haujlwm ntawm qhov ceev thiab lub zog ib txwm muaj;
8. Tighten lub caj pas bolts tusyees thiab symmetrically. Yog tias qhov sib txawv ntawm lub caj pas thiab lub valve qia me dhau, qhov sib txawv yuav tsum tau nce kom tsim nyog; Yog hais tias qhov sib txawv ntawm lub caj pas thiab lub valve qia loj heev, nws yuav tsum tau hloov.
C. Kev sib tsoo ntawm qhov chaw sealing
vim li cas:
1. Lub sealing nto yog unevenly hauv av thiab tsis tuaj yeem tsim ib txoj kab nruj;
2. Sab saum toj nruab nrab ntawm kev sib txuas ntawm lub valve qia thiab qhov kaw yog raug tshem tawm, tsis raug lossis hnav;
3. Lub qia valve yog khoov los yog sib dhos tsis raug, ua rau lub kaw lus yuav skewed lossis tawm ntawm kev sib dhos;
4. Qhov zoo ntawm cov khoom siv sealing nto yog xaiv tsis raug lossis lub valve tsis raug xaiv raws li kev ua haujlwm.
Txoj kev tu:
1. Xaiv cov khoom thiab hom gasket kom raug raws li kev ua haujlwm;
2. Ua tib zoo hloov kho, ua haujlwm du;
3. Cov bolts yuav tsum tau nruj nruj tusyees thiab symmetrically. Yog tias tsim nyog, yuav tsum siv lub torque wrench. Lub pre-tightening quab yuam yuav tsum tau raws li qhov yuav tsum tau thiab yuav tsum tsis txhob loj los yog me me. Yuav tsum muaj qee yam kev sib tw ua ntej ntawm lub flange thiab cov xov txuas;
4. Lub rooj sib dhos gasket yuav tsum tau ua kom haum rau ntawm qhov chaw, lub zog sib xws, thiab lub gasket tsis pub sib tshooj thiab siv ob lub gaskets;
5. Yog hais tias qhov zoo li qub sealing nto yog corroded, puas, thiab kev ua tau zoo tsis siab, nws yuav tsum tau kho, hauv av, thiab xyuas cov xim, thiaj li hais tias qhov zoo li qub sealing nto raws li qhov yuav tsum tau muaj;
6. Ua tib zoo saib xyuas thaum txhim kho lub gasket, lub sealing nto yuav tsum tau ntxuav nrog kerosene, thiab lub gasket yuav tsum tsis txhob poob rau hauv av.
D. Cov dej ntws tawm ntawm qhov sib koom ua ke ntawm lub nplhaib sib khi
vim li cas:
1. Lub nplhaib sealing tsis yog dov nruj nreem
2. Lub nplhaib sealing yog welded nrog lub cev, thiab qhov zoo ntawm surfacing tsis zoo;
3. Cov xov txuas, cov ntsia hlau thiab lub nplhaib ntawm lub nplhaib sealing yog xoob;
4. Lub nplhaib sealing txuas thiab corroded.
Txoj kev tu:
1. Cov dej ntws tawm ntawm qhov chaw sib khi thiab dov yuav tsum tau txhaj nrog cov nplaum thiab tom qab ntawd kho los ntawm dov;
2. Lub nplhaib sealing yuav tsum tau rov welded raws li qhov tshwj xeeb vuam. Thaum lub vuam tsis tuaj yeem kho tau, qhov qub surfacing vuam thiab kev ua haujlwm yuav raug tshem tawm;
3. Tshem tawm cov ntsia hlau, ntxuav lub nplhaib siab, hloov cov khoom puas, zom cov sealing nto ntawm lub foob thiab lub rooj sib txuas, thiab rov ua dua. Rau qhov chaw uas muaj kev puas tsuaj loj heev, nws tuaj yeem kho tau los ntawm kev sib txuas, kev sib txuas thiab lwm txoj hauv kev;
4. Qhov sib txuas ntawm lub nplhaib sealing yog corroded thiab tuaj yeem kho los ntawm kev sib tsoo, kev sib txuas thiab lwm txoj kev. Yog tias nws tsis tuaj yeem kho tau, lub nplhaib sealing yuav tsum tau hloov.
E. Cov dej ntws tawm ntawm lub cev valve thiab lub kaus mom:
vim li cas:
1. Qhov zoo ntawm cov hlau castings tsis siab, thiab muaj qhov tsis xws li cov xuab zeb qhov, cov qauv xoob thiab slag suav nrog ntawm lub valve lub cev thiab lub valve npog lub cev.
2. Hnub khov tawg;
3. Cov vuam tsis zoo, muaj qhov tsis xws luag xws li slag suav nrog, tsis siv, kev ntxhov siab tawg, thiab lwm yam;
4. Lub cam khwb cia hlau valve puas lawm tom qab raug ntaus los ntawm cov khoom hnyav.
Txoj kev tu:
1. Txhim kho qhov zoo ntawm casting, thiab ua tiav qhov kev ntsuam xyuas lub zog nruj raws li cov kev cai ua ntej kev teeb tsa;
2. Rau li qub nrog cua kub qis dua 0 degree thiab 0 degree, kev txuag hluav taws xob los yog cua sov yuav tsum tau nqa tawm, thiab cov li qub uas tsis siv yuav tsum tau muab dej ntws tawm. Kev kuaj xyuas qhov tsis zoo thiab kev ntsuas lub zog yuav tsum tau ua tom qab vuam;
3. Nws yog txwv tsis pub thawb thiab tso cov khoom hnyav rau ntawm lub valve, thiab nws tsis raug tso cai los tsoo cov hlau cam khwb cia thiab cov khoom tsis yog hlau nrog ib txhais tes rauj. Lub installation ntawm qhov loj-ntev li qub yuav tsum muaj cov brackets.
