Mitundu ya Mizere ya Ma Electromagnetic Flow Meters

Chiyambi

Ma electromagnetic flow meterndizofunikirazidapoyesa kuyenda kwa madzi oyendetsera mpweya m'mafakitale osiyanasiyana. Chipinda choyezera madzi choyendera magetsi chimagwira ntchito zofunika kwambiri. Chimagwira ntchito ngati chotchinga pakati pa ma electrode ndi madzi, kuteteza ma electrode ku dzimbiri ndikuwonetsetsa kuti akuyezedwa molondola. Kuphatikiza apo, chimateteza khoma lamkati la thupi la choyezera madzi ku zotsatira zomwe zingawononge kapena kuwononga za madzi. Mitundu yosiyanasiyana ya zingwe zimapangidwa kuti zikwaniritse zofunikira zosiyanasiyana zamadzimadzi osiyanasiyana komanso momwe zimagwirira ntchito.

Zipangizo Zodziwika Bwino

1. Mapepala a Rabala

 

• Mphira Wachilengedwe
  • Rabala yachilengedwe ndi njira yotsika mtengo komanso yotsika mtengo. Ili ndi kusinthasintha kwabwino, komwe kumalola kuti ipirire kupsinjika kwa makina panthawi yoyika ndi kugwiritsa ntchito. Ndi yoyenera kuyeza madzi okhala ndi kutentha kochepa, nthawi zambiri mpaka pafupifupi 60 - 80°C. Rabala yachilengedwe imalimbananso ndi mayankho ambiri amadzimadzi, zomwe zimapangitsa kuti ikhale chisankho chodziwika bwino chogwiritsidwa ntchito m'mafakitale oyeretsera madzi ndi zinyalala. Mwachitsanzo, mu fakitale yoyeretsera madzi zinyalala ya m'matauni, zoyezera madzi zinyalala zachilengedwe zokhala ndi rabala zingagwiritsidwe ntchito kuyeza kuyenda kwa zinyalala zosaphika, komwe madziwo angakhale ndi zinthu zina zolimba zomwe zimayimitsidwa ndi mankhwala osiyanasiyana pa kutentha kwapakati.
• Mphira wa Neoprene
  • Rabala ya Neoprene imapereka kukana kwa mankhwala kowonjezereka poyerekeza ndi rabala yachilengedwe. Imatha kukana kugwira ntchito kwa mafuta, mafuta, ndi mankhwala ambiri. Ma flow meter a Neoprene okhala ndi ma electromagnetic nthawi zambiri amagwiritsidwa ntchito m'mafakitale komwe madziwo angakhudze zinthu zotere. Mwachitsanzo, m'makampani opanga magalimoto, poyesa kuyenda kwa madzi ozizira omwe angakhale ndi zinthu zoletsa kuzizira ndi zowonjezera zina, neoprene lining imapereka chitetezo chodalirika. Kutentha kwa mamita okhala ndi ma neoprene nthawi zambiri kumakhala kokwera pang'ono kuposa kwa rabala yachilengedwe, mpaka pafupifupi 80 - 100°C.
• Mphira wa Butyl
  • Rabala ya butyl imatha kulowerera bwino kwambiri ku mpweya ndi nthunzi ya madzi. Imalimbana kwambiri ndi mankhwala, makamaka ochokera ku ma acid ndi alkali. Izi zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito komwe madziwo amawononga kwambiri. Mu makampani opanga mankhwala, poyesa kuyenda kwa asidi wamphamvu kapena ma alkali, mita yoyendera magetsi yokhala ndi mphira wa butyl ndi yabwino kwambiri. Amatha kugwira ntchito kutentha kuyambira - 40°C mpaka 120°C, zomwe zimapangitsa kuti kutentha kugwire ntchito bwino pa ntchito zosiyanasiyana zamafakitale.

2. Mapepala apulasitiki

 

• Polyvinyl Chloride (PVC)
  • PVC ndi nsalu yopangidwa ndi pulasitiki yomwe imagwiritsidwa ntchito kwambiri. Ndi yotsika mtengo ndipo imapereka mphamvu yolimbana ndi mankhwala ambiri. Ma flow meter a PVC okhala ndi ma electromagnetic ndi oyenera kugwiritsidwa ntchito mumakampani azakudya ndi zakumwa, chifukwa PVC si poizoni ndipo imagwirizana ndi miyezo yoyenera yaukhondo. Mwachitsanzo, mufakitale yopanga madzi a zipatso, ma flow meter a PVC okhala ndi ma flow meter angagwiritsidwe ntchito kuyeza kuyenda kwa madzi panthawi yopanga. Komabe, PVC ili ndi kutentha kochepa, nthawi zambiri mpaka pafupifupi 60 - 70°C.
• Polyethylene (PE)
  • PE, makamaka polyethylene yochuluka kwambiri (HDPE), imadziwika ndi kulimba kwake komanso kukana mankhwala. Ma electromagnetic flow meter okhala ndi HDPE nthawi zambiri amagwiritsidwa ntchito pamene madziwo angakhale ndi tinthu tomwe timayamwa. Mu migodi, poyesa kuyenda kwa slurry (chisakanizo cha madzi ndi tinthu tolimba), HDPE lining imatha kupirira kukwawa komwe kumachitika chifukwa cha tinthu tolimba. Ma PE lining meter amatha kugwira ntchito kutentha mpaka pafupifupi 80 - 90°C, kutengera mtundu wake wa polyethylene.
• Polytetrafluoroethylene (PTFE)
  • PTFE ndi pulasitiki yolimba kwambiri yokhala ndi kukana kwapadera kwa mankhwala. Imatha kukana pafupifupi mankhwala onse, kuphatikizapo ma asidi amphamvu, alkali, ndi zosungunulira zachilengedwe. Ma PTFE - electromagnetic flow meter amagwiritsidwa ntchito m'malo owononga kwambiri, monga m'makampani opanga mankhwala poyesa mayankho a mankhwala omwe amakhudzidwa kwambiri. PTFE ilinso ndi coefficient yochepa kwambiri ya kukangana, zomwe zimathandiza kuchepetsa kumamatira kwa madzi ku lining, kuonetsetsa kuti muyeso wolondola wa kuyenda. Kutentha kwa PTFE - PTFE - meter ndi kotakata kwambiri, kuyambira - 200°C mpaka 260°C, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito mosiyanasiyana kutentha - tcheru.

3. Mapepala a Ceramic

 

• Zoumbaumba za Alumina
  • Ma ceramic a alumina ndi olimba kwambiri komanso osawonongeka. Ndi abwino kwambiri kugwiritsa ntchito pamene madziwo ali ndi tinthu tomwe timayabwa kwambiri. Mwachitsanzo, mumakampani opanga simenti, poyesa kuyenda kwa matope a simenti, omwe ali ndi tinthu toyabwa kwambiri a simenti, ma electromagnetic flow mita a alumina ceramic omwe ali ndi alumina ceramic amatha kupereka chithandizo chodalirika kwa nthawi yayitali. Ma ceramic a alumina alinso ndi kukana kwabwino kwa mankhwala, makamaka ma acid ndi alkali pa kutentha kwambiri. Amatha kupirira kutentha mpaka pafupifupi 1000°C, zomwe zimapangitsa kuti akhale oyenera ntchito zamafakitale kutentha kwambiri.
• Zirconia zoumbaumba
  • Zirconia ceramics zimapereka mphamvu zabwino kwambiri zamakaniko komanso kukhazikika kwa mankhwala. Zimalimbana kwambiri ndi kutentha kwambiri poyerekeza ndi zida zina za ceramic. Zirconia - lined electromagnetic flow meter zimagwiritsidwa ntchito pamene madzi amatha kusintha kutentha mwachangu. Mu makampani opanga magalasi, poyesa kuyenda kwa madzi ogwirizana ndi galasi losungunuka, zirconia ceramic lining imatha kuthana ndi kutentha kwambiri komanso kutentha kwambiri, komanso kupsinjika kwa kutentha komwe kungachitike panthawiyi.

Zoganizira Zosankha

Mukasankha mtundu wa lining wamita yoyendera magetsi, zinthu zingapo ziyenera kuganiziridwa. Mtundu wa madziwo, kuphatikizapo kapangidwe kake ka mankhwala, kutentha, kupanikizika, ndi kupezeka kwa tinthu tomwe timayabwa, n'kofunika kwambiri. Pa madzi owononga kwambiri, zinthu monga PTFE kapena zinthu zina zomangira zingafunike. Pogwiritsidwa ntchito ndi madzi oyabwa, zinthu zomangira zosagwirizana ndi kuwonongeka monga rabara (pa zinthu zosayabwa kwambiri) kapena zinthu zomangira zimakonda kugwiritsidwa ntchito. Kuchepa kwa kutentha ndi kupanikizika kwa zinthu zomangira ziyeneranso kugwirizana ndi momwe zimagwirira ntchito pa mita yoyendera. Kuphatikiza apo, mtengo ndi magwiridwe antchito komanso kugwirizana ndi dongosolo lonse, kuphatikiza ma electrode ndi thupi la mita, ziyenera kuganiziridwa.

Pomaliza, kusankha mtundu woyenera wa lining wamita yoyendera magetsindi chisankho chofunikira chomwe chimakhudza mwachindunji magwiridwe antchito, kulimba, ndi kulondola kwa muyeso wa kayendedwe ka madzi m'mafakitale osiyanasiyana. Poganizira mosamala mawonekedwe a madzi ndi momwe amagwirira ntchito, zinthu zoyenera kwambiri zolumikizirana zimatha kusankhidwa kuti zitsimikizire kuti mita yoyendera yamagetsi ikugwira ntchito bwino komanso modalirika.