Zipangizo zotsekera mavavu ndi gawo lofunika kwambiri pakutseka mavavu. Kodi zipangizo zotsekera mavavu ndi ziti? Tikudziwa kuti zipangizo zotsekera mavavu zimagawidwa m'magulu awiri: chitsulo ndi chosakhala chitsulo. Izi ndi mwachidule kufotokoza momwe zinthu zosiyanasiyana zotsekera zimagwiritsidwira ntchito, komanso mitundu ya mavavu yomwe imagwiritsidwa ntchito kwambiri.
1. Rabala yopangidwa
Mphamvu zonse za mphira wopangidwa monga kukana mafuta, kukana kutentha ndi kukana dzimbiri ndi zabwino kuposa za mphira wachilengedwe. Nthawi zambiri, kutentha kwa ntchito ya mphira wopangidwa ndi t≤150℃, ndipo kutentha kwa mphira wachilengedwe ndi t≤60℃. Mphira umagwiritsidwa ntchito kutseka ma valve a globe,valavu yolowera pa chipata cha rabarama valavu a diaphragm,rvalavu ya gulugufe yokhala ndi ubber, rvalavu yowunikira swing yokhala ndi ubber seat (ma valve owunikira), ma valve opina ndi ma valve ena okhala ndi mphamvu ya PN≤1MPa.
2. Nayiloni
Nayiloni ili ndi mawonekedwe a coefficient yaying'ono yolimbana ndi dzimbiri komanso kukana dzimbiri bwino. Nayiloni imagwiritsidwa ntchito kwambiri pa ma valve a mpira ndi ma valve ozungulira okhala ndi kutentha kwa t≤90℃ ndi kupanikizika kwapadera kwa PN≤32MPa.
3. PTFE
PTFE imagwiritsidwa ntchito kwambiri pa ma valve a globe,mavavu a chipata, ma valve a mpira, ndi zina zotero. okhala ndi kutentha kwa t≤232℃ ndi kupanikizika kwapadera kwa PN≤6.4MPa.
4. Chitsulo chopangidwa ndi pulasitiki
Chitsulo chopangidwa ndi chitsulo chimagwiritsidwa ntchitovalavu ya chipata, valavu yozungulira, valavu yolumikizira, ndi zina zotero. kutentha kwa t≤100℃, kupanikizika kwapadera kwa PN≤1.6MPa, gasi ndi mafuta.
5. Babbitt alloy
Babbitt alloy imagwiritsidwa ntchito pa valavu ya ammonia globe yokhala ndi kutentha kwa t-70 ~ 150℃ ndi kupanikizika kwapadera kwa PN≤2.5MPa.
6. Aloyi wa mkuwa
Zipangizo zodziwika bwino zopangira zitsulo zamkuwa ndi 6-6-3 tin bronze ndi 58-2-2 manganese brass. Mkuwa wa alloy umakhala wolimba kwambiri ndipo ndi woyenera kugwiritsa ntchito madzi ndi nthunzi yokhala ndi kutentha kwa t≤200℃ ndi mphamvu ya PN≤1.6MPa. Nthawi zambiri umagwiritsidwa ntchito mumavavu a chipata, ma valve a globe,ma valve owunikira, ma valve olumikizira, ndi zina zotero.
7. Chitsulo chosapanga dzimbiri cha Chrome
Mitundu ya chitsulo chosapanga dzimbiri cha chromium chomwe chimagwiritsidwa ntchito kwambiri ndi 2Cr13 ndi 3Cr13, chomwe chazimitsidwa ndi kutenthedwa, ndipo chimakhala ndi kukana dzimbiri kwabwino. Nthawi zambiri chimagwiritsidwa ntchito m'ma valve opangira zinthu monga madzi, nthunzi ndi mafuta okhala ndi kutentha kwa t≤450℃ ndi kupanikizika kwapadera kwa PN≤32MPa.
8. Chitsulo chosapanga dzimbiri cha Chromium-nickel-titaniyamu
Chitsulo chosapanga dzimbiri cha chromium-nickel-titanium chomwe chimagwiritsidwa ntchito kwambiri ndi 1Cr18Ni9ti, chomwe chili ndi kukana dzimbiri, kukana kukokoloka kwa nthaka komanso kukana kutentha. Ndi choyenera kugwiritsa ntchito nthunzi, nitric acid ndi zinthu zina zomwe zimakhala ndi kutentha kwa t≤600℃ ndi mphamvu ya PN≤6.4MPa, zomwe zimagwiritsidwa ntchito pa valavu yozungulira, valavu ya mpira, ndi zina zotero.
9. Chitsulo chopanda nitride
Chitsulo chopangidwa ndi nitride chomwe chimagwiritsidwa ntchito kwambiri ndi 38CrMoAlA, chomwe chimakhala ndi kukana dzimbiri komanso kukana kukanda pambuyo pokonza carburizing. Chimagwiritsidwa ntchito kwambiri mu valavu ya chipata cha siteshoni yamagetsi yokhala ndi kutentha kwa t≤540℃ ndi kupanikizika kwapadera kwa PN≤10MPa.
10. Kusakaniza Boroni
Boronizing imakonza mwachindunji pamwamba pa kutseka kuchokera ku zinthu za thupi la valavu kapena thupi la diski, kenako imachita chithandizo cha pamwamba pa boronizing, pamwamba pa kutseka kumakhala ndi kukana kwabwino kogwiritsidwa ntchito mu valavu yogwetsera magetsi.
Nthawi yotumizira: Juni-10-2022
