Chiyambi cha Mavavu a Pressure Seal
Pressure Seal Valves
Kumanga kwa Pressure Seal kumatengera ma Valves kuti azigwira ntchito yothamanga kwambiri, nthawi zambiri kuposa mipiringidzo 170. Chochititsa chidwi kwambiri ndi chosindikizira chosindikizira Bonnet ndi chakuti thupi-Bonnet joints zisindikizo zimayenda bwino pamene kupanikizika kwa mkati mu Valve kumawonjezeka, poyerekeza ndi zomangamanga zina zomwe kuwonjezeka kwa mkati kumapangitsa kuti pakhale kutuluka kwa thupi-Bonnet joint.
Pressure seal design
- A/B - Chizoloŵezi cha bonnet kusuntha kapena kutsika pamene kupanikizika kumasintha
- C - Kupanikizika kwadongosolo
- D - Kusindikiza mphamvu chifukwa cha kukakamizidwa
Kuchuluka kwa mphamvu ya mkati, mphamvu yosindikizira imakulirakulira. Kuthyola kosavuta kumatheka pogwetsa gulu la Bonnet m'bowo la thupi ndikutulutsa mphete zamagulu anayi pogwiritsa ntchito pini yokankha.
Kutengera njira zosavuta zopangira, ma valve osindikizira osindikizira atsimikizira kuti ali ndi kuthekera kogwiritsa ntchito zinthu zakale zomwe zikuchulukirachulukira komanso zophatikizika zodzipatula za nthunzi, pomwe opanga akupitiliza kukankhira ma boiler, HRSG, ndi ma envulopu a piping system/kutentha. Mavavu osindikizira a Pressure seal amapezeka mumitundu yoyambira mainchesi 2 mpaka 24 mainchesi ndi makalasi okakamiza a ASME B16.34 kuyambira #600 mpaka #2500, ngakhale opanga ena amatha kuthana ndi kufunikira kwa mainchesi okulirapo ndi ma ratings apamwamba pamapulogalamu apadera.
Pressure seal Mavavu amapezeka muzinthu zambiri zakuthupi monga A105 forged ndi Gr.WCB cast, aloyi F22 forged ndi Gr.WC9 cast; F11 forged ndi Gr.WC6 cast, austenitic zosapanga dzimbiri F316 forged ndi Gr.CF8M cast; Kupitilira 500 ° C, F316H yabodza komanso yoyenera magiredi oponya.
Lingaliro la kapangidwe ka chisindikizo champhamvu limatha kuyambika chapakati pa zaka za m'ma 1900, pomwe, poyang'anizana ndi zovuta ndi kutentha zomwe zikuchulukirachulukira (makamaka pakugwiritsa ntchito mphamvu), opanga ma valve adayamba kupanga njira zina zosinthira njira yachikhalidwe ya bolt-Bonnet kuti asindikize cholumikizira cha thupi / Bonnet. . Pamodzi ndi kupereka mulingo wapamwamba kwambiri wotsekera malire osindikizira, mapangidwe ambiri osindikizira osindikizira a Valve anali olemera kwambiri kuposa ma bawuti awo a Bonnet Valve.
Bolted Bolts vs. Pressure Seals
Kuti timvetse bwino lingaliro la mapangidwe a chisindikizo chosindikizira, tiyeni tisiyanitse makina osindikizira a thupi ndi Bonnet pakati pa Maboneti otsekedwa ndi zosindikizira.Chithunzi 1akuwonetsa valavu ya Bolted Bonnet. Thupi la flange ndi Bonnet flange zimaphatikizidwa ndi zipilala ndi mtedza, ndi gasket yamapangidwe oyenera / zinthu zomwe zimayikidwa pakati pa nkhope za flange kuti zitheke kusindikiza. Matupi/mtedza/mabawuti amamangika ku ma torque omwe amaperekedwa munjira yofotokozedwa ndi wopanga kuti akhudze kusindikiza koyenera. Komabe, pamene kupanikizika kwa dongosolo kumawonjezeka, kuthekera kwa kutuluka kudzera mu thupi / mgwirizano wa Bonnet kumawonjezekanso.
Tsopano tiyeni tiwone chosindikizira chosindikizira chofotokozedwa mwatsatanetsataneChithunzi 2Zindikirani kusiyana kwa makonzedwe olumikizana a thupi/Bonnet. Mapangidwe ambiri osindikizira amaphatikiza "maboliti otengera Bonnet" kuti akoke Bonnet mmwamba ndikusindikiza motsutsana ndi gasket yosindikizira. Izi zimapanga chisindikizo pakati pa gasket ndi dia yamkati (ID) ya thupi la valve.
Mkombero wagawo wagawo umathandizira katunduyo. Kukongola kwa kapangidwe kachisindikizo chosindikizira ndikuti momwe kukakamiza kwadongosolo kumakulirakulira, momwemonso katundu pa Bonnet komanso, momwemonso, gasket yosindikizira. Chifukwa chake, muzitsulo zosindikizira Mavavu, pamene kupanikizika kwa dongosolo kumawonjezeka, kuthekera kwa kutuluka kupyolera mu thupi / mgwirizano wa Bonnet kumachepa.
Njira yopangira iyi ili ndi maubwino ake kuposa ma Vavu a Bonnet okhala ndi bolts mu nthunzi yayikulu, madzi odyetsa, turbine bypass, ndi makina ena opangira magetsi omwe amafunikira ma Vavu omwe amatha kuthana ndi zovuta zomwe zimachitika pakupanikizika kwambiri komanso kutentha.
Koma m'kupita kwa zaka, pamene kupanikizika/kutentha kwa magwiridwe antchito kumachulukirachulukira, komanso kubwera kwa zomera zomwe zidakwera pachimake, kukakamiza kwakanthawi kochepa komweku komwe kunathandizira kusindikiza kudasokonezanso kukhulupirika kwa chisindikizo chosindikizira.
Pressure Seal Gaskets
Chimodzi mwazinthu zazikulu zomwe zimakhudzidwa ndi kusindikiza chosindikizira chosindikizira Valve ndi gasket yomwe. Ma gaskets osindikizira oyambirira amapangidwa kuchokera kuchitsulo kapena chitsulo chofewa. Ma gaskets awa pambuyo pake adakutidwa ndi siliva kuti agwiritse ntchito mwayi wazinthu zofewa kuti azitha kusindikiza. Chifukwa cha kupanikizika komwe kumagwiritsidwa ntchito panthawi ya hydrotest ya Valve, "set" (kapena kusinthika kwa mbiri ya gasket) pakati pa Bonnet ndi gasket inatengedwa. Chifukwa cha chibadwa cha Bonnet chotengera bawuti ndi kukakamiza kusindikiza kulumikizana, kuthekera kwa Bonnet kusuntha ndi kuswa "chikhazikitso"cho chikakhudzidwa ndi kukakamizidwa kwa dongosolo kumawonjezeka/kuchepa kunalipo, ndi kutayikira kwa thupi/Bonnet.
Vutoli likhoza kunyalanyazidwa bwino pogwiritsa ntchito "kutentha kotentha" ma bolts otengera Bonnet pambuyo pa kukakamizidwa kwa dongosolo ndi kufananiza kwa kutentha, koma zimafunikira eni / osamalira ogwiritsira ntchito kuti achite izi ikayamba. Ngati mchitidwewu sunatsatidwe, kuthekera kwa kutayikira kudzera m'thupi / mgwirizano wa Bonnet udalipo, womwe ukhoza kuwononga gasket yosindikizira, Bonnet ndi / kapena ID ya thupi la Valve, komanso kupanga zovuta zowonjezereka komanso kusakwanira komwe kutayikira kwa nthunzi kungakhalepo pa ntchito za zomera. Chotsatira chake, opanga ma valve adatenga njira zingapo kuti athetse vutoli.
Chithunzi 2 chikuwonetsa kuphatikizika kwa mabawuti onyamula a Bonnet okhala ndi moyo (potero kusunga katundu wokhazikika pa gasket, kuchepetsa kuthekera kwa kutayikira) ndikusintha chitsulo / chitsulo chofewa, chosindikizira chosindikizira cha silverplated ndi chimodzi chopangidwa ndi kufa- kupanga graphite. Mapangidwe a gasket omwe akuwonetsedwa mu Chithunzi 3 atha kuyikidwa muzitsulo zosindikizira Mavavu omwe adaperekedwa kale ndi mtundu wamba wa gasket. Kubwera kwa ma graphite gaskets kwalimbitsanso kudalirika ndi magwiridwe antchito a ma valve osindikizira osindikizira pamapulogalamu ambiri komanso ngakhale poyambira / kuyimitsa ntchito tsiku lililonse.
Ngakhale opanga ambiri amalimbikitsabe "kuwotcha kotentha," kuthekera kwa kutayikira ngati sikunachitike kumachepa kwambiri. Malo okhala pamipando yosindikizira Mavavu, monganso m'mafakitale ambiri amagetsi, Mavavu amakumana ndi katundu wokwera kwambiri. Kukhulupirika kwapampando kumasungidwa ngati ntchito yololera molimba pazigawo zamagulu, njira yoperekera torque yofunikira kuti itsegule / kutseka ngati ntchito ya magiya kapena ma actuation, ndikusankha / kugwiritsa ntchito zida zoyenera zokhalapo.
Cobalt, faifi tambala, ndi zitsulo zopangira chitsulo zimagwiritsidwa ntchito kuti zisavalidwe bwino pa wedge/disiki ndi pampando mphete zokhalamo. Zomwe zimagwiritsidwa ntchito kwambiri ndi CoCr-A (mwachitsanzo, Stellite). Zidazi zimagwiritsidwa ntchito ndi njira zosiyanasiyana, kuphatikizapo zitsulo zotetezedwa, mpweya wachitsulo, mpweya wa tungsten arc, ndi plasma (yosamutsidwa) arc. Ma valve ambiri osindikizira a Globe amapangidwa kuti azikhala ndi mipando yolimba, pomwe Mavavu a Gate ndi Check Valves nthawi zambiri amakhala ndi mphete zolimba zomangidwira mu thupi la Valve.
Valving terminology
Ngati mwachitapo ndi ma valve kwa nthawi yayitali, mwina mwawona kuti opanga ma valve sapanga mopambanitsa ndi mawu ndi zilankhulo zomwe zimagwiritsidwa ntchito pabizinesi. Tengani mwachitsanzo, "Mavavu a Bonnet otsekeredwa". Thupi limalumikizidwa ku Bonnet kuti lisunge umphumphu. Kwa "ma valve osindikizira osindikizira," kuthamanga kwadongosolo kumathandizira makina osindikizira. Kwa "Imani / Yang'anani Mavavu," pamene tsinde la Valve liri pamalo otsekedwa, kutuluka kumayimitsidwa mwamakina, koma pamene ili poyera, diskiyo imakhala yomasuka kuti iwonetsetse kusintha kwa kayendedwe kake. Mfundo yomweyi imagwiranso ntchito ku mawu ena omwe amagwiritsidwa ntchito popanga, komanso mitundu ya ma Vavu ndi zigawo zake.
Nthawi yotumiza: May-11-2020