1. Sankhani valve ya utumiki wa cryogenic
Kusankha valavu ya ntchito za cryogenic kungakhale kovuta kwambiri. Ogula ayenera kuganizira momwe zinthu zilili pa bolodi ndi fakitale. Kuphatikiza apo, zinthu zenizeni zamadzimadzi a cryogenic zimafunikira magwiridwe antchito apadera. Kusankhidwa koyenera kumatsimikizira kudalirika kwa zomera, chitetezo cha zipangizo, ndi ntchito yotetezeka. Msika wapadziko lonse wa LNG umagwiritsa ntchito mapangidwe awiri akulu a valve.
Wogwiritsa ntchitoyo achepetse kukula kwake kuti thanki ya gasi ikhale yaying'ono momwe angathere. Amachita izi kudzera mu LNG (gasi wachilengedwe wokhala ndi liquefied, gasi wonyezimira). Ndi kuzirala kwa pafupifupi gasi wachilengedwe amakhala madzi. -165 ° C. Pa kutentha uku, valavu yaikulu yodzipatula iyenera kugwirabe ntchito
2. Kodi ma valve amakhudza chiyani?
Kutentha kumakhudza kwambiri mapangidwe a valve. Mwachitsanzo, ogwiritsa ntchito angafunike kumadera otchuka monga Middle East. Kapena, ingakhale yoyenera kumadera ozizira ngati nyanja za polar. Madera onsewa amatha kukhudza kulimba komanso kulimba kwa valve. Zigawo za ma valve awa ndi thupi la valve, bonnet, tsinde, tsinde seal, valavu ya mpira ndi mpando wa valve. Chifukwa cha kapangidwe kazinthu zosiyanasiyana, magawowa amakula ndikukhazikika pa kutentha kosiyanasiyana.
Zosankha za Cryogenic application
Njira 1:
Oyendetsa amagwiritsa ntchito ma valve m'malo ozizira, monga zida zamafuta m'nyanja za polar.
Njira 2:
Oyendetsa amagwiritsa ntchito ma valve kuti azitha kuyendetsa madzi omwe sazizira kwambiri.
Pankhani ya mpweya woyaka kwambiri, monga gasi wachilengedwe kapena mpweya, valavu iyeneranso kugwira ntchito moyenera ngati moto wayaka.
3.Kupanikizika
Pali kuwonjezereka kwa mphamvu panthawi yomwe mukugwira ntchito mufiriji. Izi zimachitika chifukwa cha kutentha kwa chilengedwe komanso mapangidwe a nthunzi. Chisamaliro chapadera chiyenera kuchitidwa popanga ma valve / mapaipi. Izi zimathandiza kuti kukakamiza kumangika.
4.Kutentha
Kusintha kwachangu kwa kutentha kungakhudze chitetezo cha ogwira ntchito ndi mafakitale. Chifukwa cha mitundu yosiyanasiyana ya zinthu komanso kutalika kwa nthawi yomwe amayikidwa mufiriji, chigawo chilichonse cha valavu ya cryogenic chimakula ndikugwirizanitsa pamitengo yosiyana.
Vuto lina lalikulu pogwira mafiriji ndi kuwonjezeka kwa kutentha kuchokera kumadera ozungulira. Kuwonjezeka kwa kutentha kumeneku ndi komwe kumapangitsa opanga kuti azipatula ma valve ndi mapaipi
Kuphatikiza pa kutentha kwakukulu, valve iyeneranso kukumana ndi zovuta zambiri. Kwa helium yamadzimadzi, kutentha kwa gasi wamadzimadzi kumatsika mpaka -270 ° C.
5.Ntchito
Mosiyana ndi zimenezi, ngati kutentha kwatsika kufika pa zero, ntchito ya valve imakhala yovuta kwambiri. Mavavu a cryogenic amalumikiza mapaipi ndi mpweya wamadzimadzi ku chilengedwe. Imachita izi pa kutentha kozungulira. Zotsatira zake zitha kukhala kusiyana kwa kutentha kwa 300 ° C pakati pa chitoliro ndi chilengedwe.
6.Kuchita bwino
Kusiyana kwa kutentha kumapanga kutentha kwa kutentha kuchokera kumalo otentha kupita kumalo ozizira. Idzawononga ntchito yachibadwa ya valve. Komanso amachepetsa dzuwa la dongosolo mu zikavuta. Izi zimakhala zodetsa nkhawa kwambiri ngati ayezi apanga kumapeto kofunda.
Komabe, m'malo otsika kutentha, njira yotenthetserayi imakhala yadala. Njirayi imagwiritsidwa ntchito kusindikiza tsinde la valve. Kawirikawiri, tsinde la valve limasindikizidwa ndi pulasitiki. Zidazi sizingathe kupirira kutentha kwapansi, koma zisindikizo zazitsulo zapamwamba kwambiri za zigawo ziwirizi, zomwe zimasuntha kwambiri mosiyana, zimakhala zodula kwambiri komanso sizingatheke.
7.Kusindikiza
Pali njira yosavuta yothetsera vutoli! Mumabweretsa pulasitiki yomwe imagwiritsidwa ntchito kusindikiza tsinde la valve kudera lomwe kutentha kuli koyenera. Izi zikutanthauza kuti chosindikizira cha tsinde la valve chiyenera kusungidwa patali ndi madzi.
8.Three offset rotary tight isolation valve
Zosokoneza izi zimalola kuti valve itsegule ndi kutseka. Amakhala ndi mikangano yochepa kwambiri panthawi yogwira ntchito. Imagwiritsanso ntchito torque ya stem kuti valavu ikhale yolimba kwambiri. Chimodzi mwazovuta za kusungirako kwa LNG ndi mabowo otsekeka. M'mabowo amenewa, madzimadzi amatha kutupa kwambiri kuposa nthawi 600. Valavu yodzipatula yozungulira katatu imathetsa vutoli.
9.Single ndi kawiri baffle cheke mavavu
Ma valve awa ndi gawo lofunikira kwambiri pazida zothirira madzi chifukwa amalepheretsa kuwonongeka komwe kumachitika chifukwa chakuyenda mobwerera. Zida ndi kukula ndizofunikira chifukwa ma valve a cryogenic ndi okwera mtengo. Zotsatira za ma valve olakwika zingakhale zovulaza.
Kodi mainjiniya amawonetsetsa bwanji kulimba kwa mavavu a cryogenic?
Kutayikira kumakwera mtengo kwambiri munthu akaganizira za mtengo woyamba kupanga gasi mufiriji. Ndizowopsanso.
Vuto lalikulu laukadaulo wa cryogenic ndikuthekera kwa mpando wa valve kutayikira. Ogula nthawi zambiri amanyalanyaza kukula kwa radial ndi mzere wa tsinde pokhudzana ndi thupi. Ngati ogula asankha valavu yoyenera, akhoza kupewa mavuto omwe ali pamwambawa.
Kampani yathu imalimbikitsa kugwiritsa ntchito ma valve otsika otsika opangidwa ndi chitsulo chosapanga dzimbiri. Pa ntchito ndi liquefied mpweya, zinthu amayankha bwino kutentha gradients. Mavavu a cryogenic ayenera kugwiritsa ntchito zida zosindikizira zoyenera zolimba mpaka mipiringidzo 100. Kuphatikiza apo, kukulitsa bonati ndi chinthu chofunikira kwambiri chifukwa kumatsimikizira kulimba kwa tsinde sealant.
Nthawi yotumiza: May-13-2020