Mu msonkhano wa Jinbin, zinthu zitatu zopangidwa mwamakondamavavu a magalasimakasitomala atsala pang'ono kutha. Ogwira ntchito akuchita ntchito yomaliza pa iwo. Izi ndi mafanivalavu yooneka ngati akhungusyokhala ndi kukula kwa DN1450, yokhala ndi chipangizo chamagetsi. Ayesedwa mwamphamvu kuthamanga kwa mpweya komanso kutsegula ndi kutseka ndipo akuyembekezera kulongedzedwa ndi kutumizidwa.

Valavu yophimba mapaipi akuluakulu yokhala ndi mainchesi a DN1000 ndi kupitirira apo ndi zida zofunika kwambiri zomwe zimapangidwa kuti zikwaniritse zofunikira zodzipatula za mapaipi akuluakulu kwambiri.

Ponena za ubwino wake, choyamba ndi magwiridwe ake abwino kwambiri otsekera. Mtundu uwu wa valavu nthawi zambiri umagwiritsa ntchito kapangidwe kotseka kawiri ka "chisindikizo cholimba cha elastic + metal", komwe kumathabe kutayikira ngakhale pansi pa mainchesi akuluakulu a DN1000 ndi kupitirira apo. Ndikoyenera makamaka pazochitika zomwe zimakhala ndi zofunikira kwambiri zotsekera monga mpweya ndi zinthu zoopsa, kupewa vuto la mphamvu yosagwirizana pamwamba pa chisindikizo chifukwa cha mainchesi akulu.

Kachiwiri, ndi yothandiza kwambiri komanso yosavuta kugwiritsa ntchito. Kapangidwe kake kofanana ndi fan ndi kakang'ono kuposa mbale yachikhalidwe ya blind, ndipo kulemera kwake ndi 60% yokha ya valavu ya chipata cha mainchesi ofanana. Itha kuphatikizidwa ndi zida zamagetsi ndi zoyendetsera mpweya kuti itsegule ndi kutseka patali, kuthetsa vuto la kugwira ntchito molimbika kwa mavavu akuluakulu. Nthawi yotsegulira ndi kutseka ya valavu imodzi nthawi zambiri imayendetsedwa mkati mwa masekondi 30, zomwe zimapangitsa kuti magwiridwe antchito azigwira bwino ntchito.

Kuphatikiza apo, ili ndi chitetezo champhamvu, yokhala ndi zida zotsekera zamakanika komanso ma switch oletsa kuti isagwire ntchito molakwika. Thupi la valavu losawoneka bwino limapangidwa ndi chitsulo champhamvu kwambiri kapena mbale zachitsulo zolumikizidwa, zomwe zimatha kupirira kupanikizika kwakukulu (nthawi zambiri mpaka 1.6MPa) ndi kugunda, ndipo ndizoyenera kugwiritsidwa ntchito movutikira. Kuphatikiza apo, mtengo wokonza ndi wotsika. Zigawo zotsekera zitha kuchotsedwa ndikusinthidwa padera popanda kufunikira kuchotsera payipi yonse. Ndi yoyenera makamaka pazinthu zopangira mosalekeza m'makina akuluakulu a mapaipi komwe "kutseka kumatanthauza kutayika".

Zochitika zomwe zimagwiritsidwa ntchito makamaka zimayang'ana kwambiri madera ofunikira omwe amafunikira magawo akuluakulu: Mu uinjiniya wa gasi wa m'mizinda, nthawi zambiri umagwiritsidwa ntchito m'mapaipi akuluakulu a maukonde a gasi achilengedwe a m'mizinda okhala ndi mainchesi kuyambira DN1200 mpaka DN2000, kuti akwaniritse magawo otetezeka panthawi yokonza mapaipi ndi kulumikizana kwa nthambi, kupewa kuzima kwa gasi kwakukulu. Mu mayunitsi oyeretsera mpweya ndi vacuum ndi mayunitsi oyambitsa kusweka kwa mafuta a petrochemical, mapaipi akuluakulu onyamulira mafuta osakonzedwa ndi zinthu zamafuta oyeretsedwa okhala ndi mainchesi oposa DN1000 amafunika kusintha njira kapena kupatula zida pafupipafupi.

Makhalidwe awo otseguka ndi otseka mwachangu amatha kuchepetsa nthawi yopuma yopangira. Mu makina onyowa a desulfurization/denitrification a makampani opanga magetsi, ndi oyenera mapaipi akuluakulu a gasi otulutsa mpweya okhala ndi mainchesi a DN1500 kapena kuposerapo, ndipo amatha kupatula gasi wotulutsa mpweya wotentha kwambiri (wokhala ndi kukana kutentha kwa 300℃) panthawi yokonza reactor. Dongosolo lochotsa fumbi louma la gasi wotulutsa mpweya mumakampani opanga zitsulo limafuna kuti mapaipi otumizira gasi okhala ndi mainchesi a DN1200 kapena kuposerapo akhale olimba ku kuwonongeka kwa zinthu zokhala ndi fumbi. Kapangidwe kake kotseka chitsulo kolimba katha kugwira ntchito mokhazikika kwa nthawi yayitali.

Monga kampani yopanga ma valve achitsulo (Electric Blind Valve) ya zaka 20, Jinbin Valves imapatsa makasitomala njira zabwino kwambiri zowongolera madzi komanso ntchito yolumikizana ndi munthu payekha. Ngati muli ndi mafunso okhudzana ndi izi, chonde titumizireni uthenga pansipa ndipo mudzalandira yankho mkati mwa maola 24!