A Valavu Yotsekedwa ya Bellowsndi mtundu wa valavu yozungulira yomwe imagwiritsa ntchito bellows yachitsulo ngati chinthu chachikulu chotsekera. Gawo lake lalikulu ndi bellows yachitsulo. Kudzera mu kuwotcherera kwa automatic roll, bellows imapanga chotchinga chachitsulo chopanda mpweya pakati pa madzi ndi mlengalenga, kuonetsetsa kuti palibe kutuluka kwa madzi pa tsinde la valavu. Kapangidwe kameneka sikungowonjezera magwiridwe antchito a valavu komanso kumawonjezera kwambiri moyo wake wautumiki.
Mfundo Yogwira Ntchito ya Valavu Yotsekedwa ya Bellows
Mfundo yogwirira ntchito ya Bellows Sealed Globe Valve ndi yofanana ndi ya valavu yokhazikika ya globe. Chitsinde cha valavu chimayendetsedwa mmwamba ndi pansi ndi gudumu lamanja kapena actuator, zomwe zimasuntha diski ya valavu (kapena pulagi) kuti itsegule kapena kutseka valavu. Pamene diski ikukwera mmwamba, madzi amatha kuyenda kudzera mu valavu; pamene diski ikutsika pansi, imatseka mwamphamvu mpando wa valavu, ndikuletsa kuyenda kwa madzi. Ma bellows amachita gawo lofunika kwambiri potseka pankhaniyi, kuonetsetsa kuti kutseka kukugwira ntchito bwino kwambiri pazochitika zonse zogwirira ntchito.
Mfundo yogwirira ntchito ingagawidwe m'magawo atatu akuluakulu:
1. Njira Yotsegulira:Pamene actuator ikugwira ntchito, imayendetsa push-rod, zomwe zimapangitsa kuti bellows zipanikize kapena kufalikira (kusokonekera). Nthawi yomweyo, izi zimayendetsa closure member (disc/plug). Panthawiyi, kupanikizika kwapakati komwe kumagwira ntchito mkati mwa bellows kumapanga self-balancing state.
2. Njira Yotsekera:Kugwira ntchito mobwerera m'mbuyo kumabwezeretsa chiwalo chotseka. Kudalira mphamvu yobwezeretsa yotanuka ya bellows ndi mphamvu yapakati kumatsimikizira kulimba kwathunthu.
3. Kukwaniritsa Kusindikiza:Kapangidwe kapadera kotseka kolumikizana ndi chitsulo ndi chitsulo sikukwaniritsa miyezo yotayikira (ANSI/FCI 70-2 Class V).
Zigawo Zazikulu za Valavu Yotsekedwa ya Bellows
Valavu Yotsekedwa ya Bellows ndi valavu yowongolera yokonzedwa mwapadera, makamaka yopangidwa ndi zigawo zotsatirazi:
1. Mbali Zazikulu Za Kapangidwe:
• Thupi la Valavu:Kawirikawiri amapangidwa ndi chitsulo chosapanga dzimbiri kapena chitsulo cha kaboni.
• Boneti:Yolumikizidwa ku thupi la valavu kudzera mu ma flanges kapena ulusi.
• Chomangira Chisindikizo:Lili ndi bokosi lodzaza ndi ma gasket otsekera.
2. Zigawo Zapakati Zogwira Ntchito:
• Bellows:Zimapangidwa polumikiza zigawo zingapo za masilinda achitsulo okhala ndi makoma owonda.
• Malo Olumikizira Tsinde la Valve ndi Actuator.
• Chiwalo Chotseka (Disc/Plug).
Makhalidwe a Kapangidwe ka Valavu Yotsekedwa ya Bellows
Kapangidwe ka Bellows Sealed Globe Valve kali ndi zinthu izi:
1. Kapangidwe ka Kusindikiza Kawiri:
Ili ndi kapangidwe ka zisindikizo ziwiri zomwe zimakhala ndi zophimba ndi zophimba. Ngakhale zophimbazo zitalephera, zophimbazo zimateteza kutuluka kwa madzi, zomwe zimapangitsa kuti kutseka kukhale kodalirika.
2. Kukana Kudzikundikira:
Mivi nthawi zambiri imapangidwa ndi chitsulo chosapanga dzimbiri, zomwe zimapangitsa kuti ikhale yolimba kwambiri komanso yolimba bwino pamitundu yosiyanasiyana ya zinthu.
3. Kapangidwe ka Moyo Wautali:
Ma bellow opangidwa ndi hydraulic amakhala ndi nthawi yayitali yotopetsa, amatha kupirira kutsegula ndi kutseka ntchito pafupipafupi.
4. Chitetezo cha Tsinde:
Mapeto a pansi pa bellows amalumikizidwa ku tsinde la valavu, zomwe zimateteza kuti lisakokoloke ndi madzi otuluka mu processing ndikuwonjezera nthawi ya ntchito ya tsinde.
5. Chigoba Cholimba cha Mpando:
Malo otsekerawo amalumikizidwa ndi cobalt-based hard alloy (Co-based), zomwe zimapangitsa kuti zinthu zisamawonongeke, zisawonongeke, komanso kuti zisawonongeke, zomwe zimapangitsa kuti ntchitoyo ikhale yayitali.
Ubwino Waukadaulo
•Kugwira Ntchito Kosataya Madzi:
Mivi yachitsulo imachotsa kwathunthu kutuluka kwa tsinde, zomwe zimapangitsa kuti ikhale yoyenera kwambiri pa zinthu zoopsa, zoyaka moto, kapena zoyera kwambiri.
•Kukana Kudzimbirika ndi Kusavala:
Tsinde la valavu limazimitsidwa ndi kutenthedwa komanso kusungunuka pamwamba. Malo okhala amakulungidwa ndi zitsulo zolimba (monga Co-based), zomwe zimateteza madzi owononga komanso kuwonongeka kwa tinthu tating'onoting'ono.
•Kuyenerera pa Mikhalidwe Yaikulu:
Kutentha kumayambira pa -40°C mpaka 425°C, makamaka koyenera makina amafuta otentha kwambiri (kuthamanga pang'ono, kutentha kwambiri).
•Kukonza Kosavuta:
Kapangidwe ka bellows kamachepetsa kufunika kosintha zinthu, zomwe zimachepetsa ndalama zokonzera zinthu kwa nthawi yayitali.
Kusiyana Pakati pa Ma Valves a Bellows Sealed Globe ndi Ma Valves a Standard Globe
1. Kapangidwe Kapadera & Chitsimikizo Chachidindo Chawiri
Kupadera kwa Bellows Sealed Globe Valve kuli mu kapangidwe kake kopanda kutayikira. Yodziwika bwino chifukwa cha mphamvu yake yotaya madzi komanso chitsimikizo cha kutseka kawiri, imatsimikizira chitetezo cha kutseka kwa tsinde. Kapangidwe kameneka kamamanga chotchinga chachitsulo cholimba pakati pa madzi ndi mlengalenga kudzera mu welding yodziyimira payokha, kuonetsetsa kuti palibe kutayikira. Imasonyeza kupambana kwakukulu poyerekeza ndi ma globe valve achikhalidwe. Ngati bellows yalephera, kulongedza tsinde kumagwira ntchito ngati chosindikizira chothandizira, kusunga kuti palibe kutayikira. Kapangidwe kake kolimba komanso kolimba ka bellows sikuti kokha kamangotsimikizira kugwira ntchito bwino kwa kutseka kwa tsinde komanso kumapereka ntchito yopanda kukonza.
2. Kapangidwe ndi Kukana Kuvala
Valavu ya Bellows Sealed Globe ili ndi kapangidwe kabwino popanda kutayika kwa madzi, kuchepetsa kugwiritsa ntchito mphamvu. Valavu iyi imapereka kapangidwe kabwino, kutseka kodalirika, magwiridwe antchito abwino kwambiri, komanso mawonekedwe okongola. Kusowa kwa kutayika kwa madzi kumachepetsa kutayika kwa mphamvu ndikuwonjezera chitetezo cha zida zamafakitale. Malo ake otsekera amagwiritsa ntchito welding yolimba ya Co-based alloy overlay, yomwe imapereka kukana kwabwino kwambiri kuwonongeka, kukana dzimbiri, komanso mphamvu zotsutsana ndi kukangana, kuchepetsa zosowa ndi ndalama zokonzera. Izi zimawonjezera nthawi yogwirira ntchito, zimachepetsa nthawi yokonzanso, komanso zimachepetsa ndalama zogwirira ntchito.
3. Kukana Kudzikundikira Poyerekeza ndi Ma Vavu Okhazikika a Globe
Tsinde la valavu la Bellows Sealed Globe Valve limaphwanyidwa ndi kutenthedwa komanso kusungunuka pamwamba, zomwe zimapangitsa kuti likhale ndi dzimbiri komanso kukana kukangana. Mosiyana ndi zimenezi, valavu yokhazikika yotsekedwa (monga valavu yokhazikika yozungulira) ilinso ndi makhalidwe enaake. Ndi yotchuka chifukwa cha ubwino wake monga kukangana kochepa potsegula/kutseka, kulimba, komanso mosavuta kupanga ndi kukonza. Komabe, ilinso ndi zovuta zina, monga kukana madzi ambiri komanso kusadalirika kokhazikika kwa nthawi yayitali. Ponseponse, valavu yokhazikika yozungulira imakhalabe mtundu wa valavu wogwiritsidwa ntchito kwambiri komanso wodalirika. Komabe, mavalavu okhazikika ozungulira amakhala ndi zovuta monga kukana madzi ambiri komanso kusagwira bwino ntchito kwa nthawi yayitali, zomwe zimapangitsa kuti asagwire bwino ntchito kuposa mavalavu otsekedwa a Bellows Sealed Globe.
4. Ubwino ndi Kuyerekeza kwa Kugwiritsa Ntchito
Mu mafakitale, mavuto akunja otuluka chifukwa cha kukalamba kwa tsinde mu ma globe valves okhazikika ndi ofala. Ma Bellows Sealed Globe Valves amachita bwino kwambiri pantchito zamafakitale, kupewa mavuto omwe angakhalepo mu ma globe valves okhazikika. Kutuluka kumeneku kumatha kukhala ndi kutentha kwambiri, poizoni kwambiri, kuyaka, kuphulika, kapena ma radioactive media, zomwe zimapangitsa osati kuipitsa chilengedwe kokha komanso kuvulaza anthu komanso kutayika kwa katundu. Kapangidwe ka Bellows Sealed Globe Valve kamathetsa vutoli kwathunthu. Kapangidwe kake ka bellows seal kamapangitsa kuti valavuyo isakonze bwino, kupititsa patsogolo kugwiritsa ntchito mphamvu moyenera, kulimbikitsa chitetezo cha zida zopangira, komanso kuchepetsa ndalama zokonzera komanso kufunikira kokonza pafupipafupi. Chifukwa chake, imapereka malo ogwirira ntchito oyera komanso amachepetsa ndalama zokonzera, kupereka yankho lomwe ndi loyera komanso lotetezeka.
Magawo Ogwiritsira Ntchito Ma Valves Otsekedwa a Bellows
Pogwiritsa ntchito bwino kwambiri kutseka ndi kudalirika kwawo, ma Bellows Sealed Globe Valve amagwiritsidwa ntchito kwambiri m'mafakitale ambiri kuphatikiza mafuta, mankhwala, mankhwala, feteleza, ndi magetsi, makamaka m'mafakitale omwe amafuna kutseka kwapamwamba kwambiri.
1. Makampani Opanga Mankhwala
Mu makampani opanga mankhwala, ma Bellows Sealed Globe Valves amalamulira kuyenda kwa zinthu zowononga. Mwachitsanzo, fakitale ya mankhwala imagwiritsa ntchito ma valve awa potumiza mpweya wa chlorine. Valavuyi imagwiritsa ntchito chitsulo cha LCB cholimba kutentha kochepa chomwe sichingagwere m'thupi, chokhala ndi ma bellow opangidwa ndi Hastelloy C-276 ndi PTFE V-ring seals, okhala ndi kapangidwe ka dual-seal komwe kamaletsa kutayikira kwa chlorine.
2. Makampani Opanga Mankhwala
Makampani opanga mankhwala amaika zofunikira kwambiri pa ukhondo ndi kutseka ma valve. Kapangidwe ka ma valve awiri komanso kukana dzimbiri kwa Bellows Sealed Globe Valves kumawapatsa chisankho chabwino kwambiri. Mwachitsanzo, kampani yopanga mankhwala imawagwiritsa ntchito m'makina amafuta otentha. Ma valve awa ali ndi kapangidwe kowongoka bwino komanso kutsika kwa mphamvu yotsika. Kapangidwe kowongoka kamalola makina odzichotsera okha, omwe amapereka magwiridwe antchito abwino kuposa mitundu ina ya ma valve a globe.
3. Makampani Opanga Mphamvu
Mu makampani opanga magetsi, ma Bellows Sealed Globe Valve amagwiritsidwa ntchito m'mapaipi a nthunzi ndi makina a boiler kuti atsimikizire kuti nthunzi imasamutsidwa bwino komanso kuti imayang'aniridwa bwino. Mwachitsanzo, kampani yopanga magetsi imawagwiritsa ntchito pamizere ya nthunzi. Ma valve amenewa amateteza nthunzi kutuluka, zomwe zimapangitsa kuti mphamvu zizigwiritsidwa ntchito bwino.
4. Makampani Ogulitsa Zakudya ndi Zakumwa
Malamulo okhwima okhudza ukhondo ndi chitetezo ndi omwe amakhudza makampani opanga zakudya ndi zakumwa. Kugwira ntchito bwino kwa ma valve a Bellows Sealed Globe ndi kukana dzimbiri kumathandiza kuti akwaniritse zosowa izi. Mwachitsanzo, kampani yopanga mowa imagwiritsa ntchito ma valvewa powongolera nthunzi panthawi yopanga, kuonetsetsa kuti malo opangira ndi oyera komanso otetezeka.
Kukhazikitsa ndi Kusamalira Ma Valves Otsekedwa a Bellows
1. Malangizo Othandizira Kukhazikitsa
• Malangizo Okhazikitsa:Ikani valavu motsatira njira ya madzi, kuonetsetsa kuti madzi akuyenda kuchokera pansi kupita pamwamba kuti muchepetse kukana kwa madzi mkati mwa valavu.
• Njira Yolumikizira:Sankhani njira yoyenera yolumikizira (monga, yolumikizidwa kapena yolumikizidwa) kutengera momwe zinthu zilili.
• Zofunikira pa Zachilengedwe:Malo oyikapo ayenera kupewa kutentha kwambiri, chinyezi, ndi malo owononga kuti awonjezere nthawi yogwira ntchito ya mavavu.
2. Malangizo Okonza
•Kuyang'anira Nthawi Zonse:Nthawi ndi nthawi onani momwe kutseka kwa bellows kumagwirira ntchito kuti muwonetsetse kuti palibe kutuluka kwa madzi.
•Kuyeretsa ndi Kupaka Mafuta:Tsukani kunja kwa valavu nthawi zonse ndikudzola mafuta pa tsinde la valavu kuti dzimbiri lisamamatire.
•Kusamalira Zadzidzidzi:Ngati kutayikira kwa bellows kwapezeka, gwiritsani ntchito chigoba chadzidzidzi kuti mutseke kwakanthawi kuti mupewe kutayikira kwina.
3. Mfundo Zofunika Zosamalira
• Kupewa Kulephera:Kusweka kwa khosi la Bellows ndi njira yoyamba yolephera; kuyang'anitsitsa nthawi zonse kumafunika. Mapangidwe ena a ma valve ali ndi makatiriji a bellows omwe amatha kusinthidwa kuti ntchitoyo ikhale yosavuta.
• Kuyenerera kwa Mkhalidwe:Pa malo otentha kwambiri (monga >200°C), perekani ma valve a Bellows Sealed Globe achitsulo chosapanga dzimbiri kuti musawononge mapaketi.
Mapeto
Ma valve a Bellows Sealed Globe, kudzera muukadaulo watsopano wotsekera, amathetsa mavuto akunja otuluka a ma valve achikhalidwe. Amachita bwino kwambiri pakutsekera, chitetezo, komanso kulimba, zomwe zimapangitsa kuti akhale mtundu wa ma valve osankhidwa nthawi zambiri m'magawo ovuta monga kukonza mankhwala ndi mphamvu.
Nthawi yotumizira: Ogasiti-08-2025