2.5 plug valve
Pulagi valve ndi valavu yomwe imagwiritsa ntchito plug thupi lomwe lili ndi dzenje ngati gawo lotsegula ndi lotseka, ndipo thupi la pulagi limazungulira ndi tsinde la valve kuti likwaniritse kutsegula ndi kutseka. Valve ya plug ili ndi dongosolo losavuta, kutsegula ndi kutseka mwamsanga, ntchito yosavuta, kukana kwamadzimadzi pang'ono, magawo ochepa ndi kulemera kochepa. Mavavu olumikizira amapezeka mowongoka, njira zitatu komanso njira zinayi. Valve yowongoka ya pulagi imagwiritsidwa ntchito podula sing'anga, ndipo ma valve a njira zitatu ndi zinayi amagwiritsidwa ntchito kusintha njira yapakati kapena kutembenuza sing'anga.
Vavu ya butterfly ndi mbale yagulugufe yomwe imazungulira 90 ° mozungulira mozungulira mu thupi la valve kuti amalize kutsegula ndi kutseka. Mavavu agulugufe ndi ang'onoang'ono, opepuka kulemera kwake komanso osavuta kupanga, okhala ndi magawo ochepa chabe.
Ndipo imatha kutsegulidwa ndikutsekedwa mwachangu ndikungozungulira 90 °, yomwe ndi yosavuta kuyigwiritsa ntchito. Pamene valavu ya gulugufe ili pa malo otseguka, makulidwe a gulugufe mbale ndi kukana kokha pamene sing'anga ikuyenda mu valavu thupi. Chifukwa chake, kutsika kwamphamvu komwe kumapangidwa ndi valavu kumakhala kochepa kwambiri, kotero kumakhala ndi mawonekedwe abwino owongolera. Mavavu agulugufe amagawidwa m'mitundu iwiri yosindikiza: zotanuka zofewa chisindikizo ndi chitsulo cholimba chisindikizo. Vavu yosindikizira yokhazikika, mphete yosindikizira imatha kuyikidwa mu valavu kapena kumangirizidwa pamphepete mwa mbale yagulugufe. Ili ndi ntchito yabwino yosindikiza ndipo imatha kugwiritsidwa ntchito popuntha, mapaipi apakati a vacuum ndi media zowononga. Mavavu okhala ndi zisindikizo zachitsulo nthawi zambiri amakhala ndi moyo wautali kuposa mavavu okhala ndi zisindikizo zotanuka, koma ndizovuta kuti asindikize kwathunthu. Nthawi zambiri amagwiritsidwa ntchito pomwe kuthamanga ndi kutsika kwamphamvu kumasintha kwambiri komanso kuchita bwino kumafunika. Zisindikizo zazitsulo zimatha kusintha kutentha kwapamwamba, pamene zosindikizira zotanuka zimakhala ndi vuto lochepa chifukwa cha kutentha.
2.7Onani valavu
Valve yowunika ndi valavu yomwe imatha kulepheretsa kutuluka kwamadzimadzi. Chimbale cha valavu ya cheki chimatseguka pansi pa mphamvu yamadzimadzi, ndipo madzi amadzimadzi amayenda kuchokera kumbali yolowera kupita kumbali yotulukira. Pamene kupanikizika kumbali yolowera kumakhala kotsika kuposa mbali yotulukira, valavu ya valve imatseka yokha pansi pa kusiyana kwa kuthamanga kwa madzi, mphamvu yake yokoka ndi zinthu zina kuti madzi asabwerere. Malinga ndi mawonekedwe ake, imatha kugawidwa mu valavu yokweza ndi swing check valve. Mtundu wokweza uli ndi kusindikiza bwino komanso kukana kwamadzimadzi kuposa mtundu wa swing. Pakulowetsa kwa chitoliro chokokera pampu, valavu yapansi iyenera kugwiritsidwa ntchito. Ntchito yake ndikudzaza chitoliro cholowera pampu ndi madzi musanayambe kupopera; mutayimitsa mpope, sungani chitoliro cholowera ndi thupi lodzaza madzi pokonzekera kuyambanso. Vavu yapansi nthawi zambiri imayikidwa pa chitoliro choyima pa polowera, ndipo sing'angayo imayenda kuchokera pansi kupita pamwamba.
Mbali yotsegula ndi yotseka ya valve ya diaphragm ndi diaphragm ya rabara, yomwe imayikidwa pakati pa thupi la valve ndi chivundikiro cha valve.
Mbali yapakati yotuluka ya diaphragm imakhazikika pa tsinde la valavu, ndipo thupi la valve limakutidwa ndi mphira. Popeza sing'anga sichilowa mkati mwa chivundikiro cha valavu, tsinde la valve sikutanthauza bokosi lodzaza. Valavu ya diaphragm ili ndi mawonekedwe osavuta, kusindikiza bwino, kukonza kosavuta, komanso kutsika kwamadzimadzi. Mavavu a diaphragm amagawidwa kukhala mtundu wa weir, mtundu wowongoka, wolunjika kumanja ndi mtundu woyenda molunjika.
3. Malangizo osankhidwa bwino a valve
3.1 Malangizo osankha vavu pachipata
M'mikhalidwe yabwino, ma valve a zipata ayenera kukhala abwino. Kuphatikiza pa kukhala oyenerera nthunzi, mafuta ndi ma TV ena, ma valve a pachipata ndi oyeneranso pa media omwe ali ndi zolimba za granular ndi kukhuthala kwakukulu, ndipo ndi oyenera ma valve mumayendedwe opumira komanso otsika. Kwa media yomwe ili ndi tinthu tolimba, thupi la valve ya pachipata liyenera kukhala ndi mabowo amodzi kapena awiri. Kwa zofalitsa zochepetsera kutentha, ma valve apadera otsika kutentha ayenera kusankhidwa.
3.2 Malangizo osankha ma valve oyimitsa
Valavu yoyimitsa ndi yoyenera mapaipi okhala ndi zofunikira zosasamala pa kukana kwamadzimadzi, ndiye kuti, kutayika kwamphamvu sikumaganiziridwa kwambiri, ndi mapaipi kapena zida zokhala ndi kutentha kwambiri komanso media media. Ndi oyenera nthunzi ndi mapaipi ena sing'anga ndi DN <200mm; mavavu ang'onoang'ono amatha kugwiritsa ntchito ma valve odulidwa. Mavavu, monga mavavu a singano, ma valve a zida, mavavu a zitsanzo, ma valve oyesa kuthamanga, ndi zina zotero; ma valve oyimitsa ali ndi kusintha kwa kayendedwe ka kayendedwe kake kapena kusintha kwa kuthamanga, koma kusintha kulondola sikofunikira, ndipo m'mimba mwake ya mapaipi ndi ochepa, choncho valve yoyimitsa kapena valve yogwedeza iyenera kugwiritsidwa ntchito Vavu; Pazinthu zapoizoni kwambiri, valavu yotsekera yotsekedwa iyenera kugwiritsidwa ntchito; komabe, valavu yoyimitsa sayenera kugwiritsidwa ntchito pazofalitsa zokhala ndi ma viscosity apamwamba komanso zofalitsa zomwe zimakhala ndi tinthu tating'onoting'ono tomwe timakonda kusungunuka, komanso sayenera kugwiritsidwa ntchito ngati valavu yotulutsa mpweya ndi valavu mu dongosolo lochepa la vacuum.
3.3 Malangizo osankha valavu ya mpira
Mavavu a mpira ndi oyenera kutentha kwapansi, kuthamanga kwambiri, komanso kukhuthala kwambiri. Mavavu ambiri a mpira amatha kugwiritsidwa ntchito pazofalitsa ndi tinthu tating'onoting'ono tokhazikika, ndipo angagwiritsidwenso ntchito muzofalitsa zaufa ndi granular malinga ndi zomwe zimafunikira kusindikiza; ma valve a mpira wanjira zonse sizoyenera kuwongolera kayendedwe kake, koma ndi oyenera nthawi zomwe zimafuna kutsegula ndi kutseka mwachangu, zomwe ndizosavuta kugwiritsa ntchito. Kudulidwa kwadzidzidzi mu ngozi; Nthawi zambiri amalimbikitsidwa m'mapaipi okhala ndi kusindikiza kolimba, kuvala, kutsika kwamayendedwe, kutseguka ndi kutseka mwachangu, kutsika kwamphamvu kwambiri (kusiyana kwakukulu kwapakati), phokoso lotsika, chodabwitsa cha gasification, torque yaying'ono yogwira ntchito, komanso kukana madzimadzi pang'ono. Gwiritsani ntchito mavavu a mpira; mavavu a mpira ndi oyenera kupangira kuwala, kutsika kwapakatikati, ndi media zowononga; mavavu a mpira ndi mavavu abwino kwambiri otsika kutentha komanso media cryogenic. Kwa makina opangira mapaipi ndi zida zokhala ndi zotengera zochepetsera kutentha, ma valve otsika otsika a mpira okhala ndi zophimba ma valve ayenera kugwiritsidwa ntchito; sankhani Mukamagwiritsa ntchito valavu ya mpira yoyandama, mipando yake iyenera kunyamula mpira ndi sing'anga yogwirira ntchito. Mavavu a mpira wokulirapo amafunikira mphamvu yayikulu panthawi yogwira ntchito. Mavavu a mpira ndi DN ≥ 200mm ayenera kugwiritsa ntchito mphutsi kufala; mavavu a mpira osasunthika ndi oyenera ma diameter akulu ndi mikhalidwe yothamanga kwambiri; Kuphatikiza apo, mavavu a mpira omwe amagwiritsidwa ntchito popanga mapaipi azinthu zapoizoni kwambiri komanso media zoyaka moto ayenera kukhala ndi zida zoteteza moto komanso zotsutsana ndi malo amodzi.
3.4 Malangizo osankha ma valve a Throttle
Valavu ya throttle ndi yoyenera nthawi zomwe kutentha kwapakati kumakhala kochepa komanso kupanikizika kwambiri. Ndikoyenera ku zigawo zomwe zimayenera kusintha kuthamanga ndi kuthamanga. Sikoyenera kwa atolankhani okhala ndi mamasukidwe apamwamba komanso tinthu tating'onoting'ono, ndipo sizoyenera kugwiritsidwa ntchito ngati valavu yodzipatula.
3.5 Malangizo osankha ma valve
Pulagi valve ndi yoyenera pazochitika zomwe zimafuna kutsegulidwa ndi kutseka mwachangu. Nthawi zambiri siyenera kukhala ndi nthunzi komanso sing'anga ndi kutentha kwambiri. Amagwiritsidwa ntchito ngati sing'anga ndi kutentha kochepa komanso kukhuthala kwakukulu, komanso ndi oyenera sing'anga ndi particles zoimitsidwa.
3.6 Malangizo osankha vavu ya butterfly
Mavavu agulugufe ndi oyenera malo okhala ndi mainchesi akulu (monga DN﹥600mm) ndi utali wamfupi wamapangidwe, komanso nthawi zomwe kusintha koyenda komanso kutsegula ndi kutseka kumafunikira. Nthawi zambiri amagwiritsidwa ntchito popangira madzi, mafuta ndi kuponderezana ndi kutentha kwa ≤80 ° C ndi zovuta ≤1.0MPa. Air ndi media zina; chifukwa kutayika kwa mavavu agulugufe ndikokulirapo poyerekeza ndi mavavu a pachipata ndi mavavu a mpira, mavavu agulugufe ndi oyenera pamapaipi omwe ali ndi vuto lotaya mphamvu.
3.7 Onani malangizo osankha ma valve
Chongani mavavu nthawi zambiri ndi oyenera TV zoyera ndipo si oyenera TV okhala ndi particles olimba ndi mkulu mamasukidwe akayendedwe. Pamene DN ≤ 40mm, valavu yowunikira iyenera kugwiritsidwa ntchito (zongololedwa kuikidwa pa mapaipi opingasa); pamene DN = 50 ~ 400mm, valavu yoyendera nsonga iyenera kugwiritsidwa ntchito (ikhoza kuikidwa pamapaipi onse opingasa ndi ofukula, Ngati aikidwa pa payipi yowongoka, njira yodutsa pakati iyenera kukhala kuchokera pansi mpaka pamwamba); pamene DN ≥ 450mm, valavu cheke chotchinga ayenera kugwiritsidwa ntchito; pamene DN = 100 ~ 400mm, valavu yoyang'ana yopyapyala ingagwiritsidwenso ntchito; valavu yoyang'ana swing valve yobwerera ikhoza kupangidwa kuti ikhale yogwira ntchito kwambiri, PN ikhoza kufika ku 42MPa, ndipo ingagwiritsidwe ntchito pamtundu uliwonse wogwira ntchito ndi kutentha kulikonse kogwira ntchito malinga ndi zipangizo za chipolopolo ndi zisindikizo. Sing'anga ndi madzi, nthunzi, gasi, sing'anga zikuwononga, mafuta, mankhwala, etc. The ntchito kutentha osiyanasiyana sing'anga ndi pakati -196 ~ 800 ℃.
3.8 Malangizo osankha vavu ya diaphragm
Valavu ya diaphragm ndi yoyenera mafuta, madzi, zofalitsa za acidic ndi zofalitsa zomwe zimakhala ndi zolimba zoyimitsidwa ndi kutentha kwa ntchito kosachepera 200 ° C ndi kupanikizika kosachepera 1.0MPa. Sikoyenera organic solvents ndi amphamvu oxidant TV. Mavavu amtundu wa weir diaphragm ayenera kusankhidwa kuti azitha kubisala media. Mukasankha valavu yamtundu wa weir diaphragm, tchulani tebulo la mawonekedwe ake; madzi a viscous, slurries simenti ndi mpweya mpweya ayenera kugwiritsa ntchito zowongoka kudzera diaphragm mavavu; kupatula pa zofunikira zenizeni, mavavu a diaphragm sayenera kugwiritsidwa ntchito popanga mapaipi a vacuum ndi vacuum.
Nthawi yotumiza: Dec-08-2023
