Gulu la flow mita

Gulu la zida zamagetsi zitha kugawidwa mu: volumetric flowmeter, velocity flowmeter, chandamale flowmeter, electromagnetic flowmeter, vortex flowmeter, rotameter, kusiyanitsa kuthamanga flowmeter, akupanga flowmeter, Misa otaya mita, etc.

1. Rotameter

Float flowmeter, yomwe imadziwikanso kuti rotameter, ndi mtundu wamtundu wamtundu wa flowmeter.Mu chubu cha cone chowongoka chomwe chimakulirakulira kuchokera pansi kupita pamwamba, mphamvu yokoka ya zoyandama zozungulira zozungulira zimanyamulidwa ndi mphamvu ya hydrodynamic, ndipo zoyandama zimatha kukhala mu Cone imatha kuwuka ndikugwa momasuka.Imayenda mmwamba ndi pansi pansi pa kuthamanga kwa kuthamanga ndi kuthamanga, ndipo itatha kufananiza ndi kulemera kwa choyandama, imatumizidwa ku dial kuti iwonetse kuthamanga kwa kayendedwe ka maginito.Nthawi zambiri anawagawa galasi ndi zitsulo rotameters.Metal rotor flowmeters ndi omwe amagwiritsidwa ntchito kwambiri pamakampani.Pazinthu zowononga zokhala ndi ma diameter ang'onoang'ono, galasi imagwiritsidwa ntchito.Chifukwa cha fragility ya galasi, fungulo lowongolera ndi rotor flowmeter yopangidwa ndi zitsulo zamtengo wapatali monga titaniyamu..Pali opanga ma rotor flowmeter ambiri, makamaka Chengde Kroni (wogwiritsa ntchito ukadaulo waku Germany Cologne), Kaifeng Instrument Factory, Chongqing Chuanyi, ndi Changzhou Chengfeng onse amatulutsa zozungulira.Chifukwa cha kulondola kwapamwamba komanso kubwereza kwa ma rotameters, Amagwiritsidwa ntchito kwambiri pozindikira kutuluka kwa mapaipi ang'onoang'ono (≤ 200MM).

2. Positive displacement flow mita

The positive displacement flowmeter imayeza kuchuluka kwa madzimadzi poyesa kuchuluka kwa metering komwe kumapangidwa pakati pa nyumba ndi rotor.Malinga ndi kapangidwe ka rotor, mita yoyenda bwino imaphatikizapo mtundu wa gudumu la m'chiuno, mtundu wa scraper, mtundu wa zida za elliptical ndi zina zotero.Mamita oyenda bwino osamutsidwa amadziwika ndi kuyeza kwakukulu, ena mpaka 0.2%;dongosolo losavuta komanso lodalirika;kugwiritsa ntchito kwakukulu;kutentha kwakukulu ndi kukana kuthamanga kwakukulu;zinthu otsika unsembe.Amagwiritsidwa ntchito kwambiri poyezera mafuta osapsa ndi zinthu zina zamafuta.Komabe, chifukwa cha magalimoto oyendetsa, kuchuluka kwa payipi ndiye ngozi yobisika kwambiri.Ndikofunikira kukhazikitsa fyuluta kutsogolo kwa zida, zomwe zimakhala ndi nthawi yochepa ya moyo ndipo nthawi zambiri zimafunika kukonza.Magawo akuluakulu opangira zoweta ndi awa: Kaifeng Instrument Factory, Anhui Instrument Factory, etc.

3. Kusiyanasiyana kuthamanga mita

Kusiyana kwa kuthamanga kwa flowmeter ndi chipangizo choyezera chokhala ndi mbiri yakale yogwiritsidwa ntchito komanso deta yonse yoyesera.Ndi mita yothamanga yomwe imayesa kusiyana kwa kuthamanga kwa static komwe kumapangidwa ndi madzi omwe akuyenda kudzera mu chipangizo chogwedeza kuti awonetse kuthamanga.Kusintha kofunikira kwambiri kumapangidwa ndi chipangizo chopukutira, mapaipi amagetsi osiyanitsa komanso geji yosiyana.Kachipangizo kamene kamagwiritsidwa ntchito kwambiri pamakampani ndi "chipangizo chokhazikika" chomwe chakhala chokhazikika.Mwachitsanzo, orifice muyezo, nozzle, venturi nozzle, venturi chubu.Tsopano chipangizo chopukutira, makamaka kuyeza koyenda kwa nozzle, chikupita ku kuphatikizika, ndipo cholumikizira chapamwamba kwambiri chosiyana ndi chiwongola dzanja cha kutentha chimaphatikizidwa ndi nozzle, zomwe zimawongolera kulondola kwambiri.Ukadaulo wa Pitot chubu ungagwiritsidwe ntchito kuwongolera chida chowongolera pa intaneti.Masiku ano, zida zina zomwe sizili zodziwika bwino zimagwiritsidwanso ntchito poyezera mafakitale, monga ma orifice plates, orifice plates, orifice plates, annular orifice plates, ndi zina zotere.Kapangidwe ka chipangizo muyezo throttling n'zosavuta, koma chifukwa chofunika ndi mkulu kwa dimensional kulolerana, mawonekedwe ndi malo kulolerana, ndi luso processing ndi zovuta.Kutengera chitsanzo cha orifice mbale monga mwachitsanzo, ndi gawo laling'ono kwambiri lokhala ngati mbale, lomwe limakonda kupindika panthawi yokonza, ndipo mbale zazikuluzikulu zapamtunda zimakhalanso ndi zowonongeka pakagwiritsidwe ntchito, zomwe zimakhudza kulondola.Bowo lopondereza la chipangizo chopukutira nthawi zambiri si lalikulu kwambiri, ndipo limapunduka pakagwiritsidwa ntchito, zomwe zimakhudza kulondola kwa muyeso.Chovala chodziwika bwino cha orifice chidzawononga zinthu zamapangidwe okhudzana ndi kuyeza (monga ma angles owopsa) chifukwa cha kugunda kwamadzimadzi pogwiritsira ntchito, zomwe zimachepetsa kulondola kwa muyeso.

Ngakhale kuti kukula kwa ma mita otaya kuthamanga kosiyana kuli koyambirira, ndikusintha kosalekeza ndikukula kwa mitundu ina ya mita yotaya, komanso kuwongolera mosalekeza kwa kuyeza koyezera zomwe zikufunika pakukula kwa mafakitale, malo osiyanitsira kuthamanga kwa mita pakuyezetsa kwa mafakitale kwakhala pang'ono. Imasinthidwa ndi ma meter apamwamba, olondola kwambiri komanso osavuta.

4. Electromagnetic flowmeter

Ma electromagnetic flowmeter amapangidwa kutengera mfundo ya Faraday electromagnetic induction kuti ayeze kuchuluka kwamadzimadzi oyendetsa.Malinga ndi lamulo la Faraday la electromagnetic induction, kondakitala akadula mzere wa maginito mu mphamvu ya maginito, magetsi opangidwa amapangidwa mu kondakitala.Kukula kwa mphamvu ya electromotive kumagwirizana ndi kondakitala.Mu mphamvu ya maginito, kuthamanga kwa kayendetsedwe ka kayendedwe ka maginito kumayenderana, ndiyeno malinga ndi kukula kwa chitoliro ndi kusiyana kwa sing'anga, kumasandulika kukhala othamanga.

Electromagnetic flowmeter ndi mfundo zosankhidwa: 1) Madzi oti ayezedwe ayenera kukhala amadzimadzi oyendetsa kapena slurry;2) Caliber ndi osiyanasiyana, makamaka mulingo wabwinobwino ndi wopitilira theka la kuchuluka kwathunthu, ndipo kuthamanga kwake kuli pakati pa 2-4 metres;3).Kuthamanga kwa ntchito kuyenera kukhala kochepa kusiyana ndi kuthamanga kwa flowmeter;4).Zida zosiyanasiyana zopangira ma elekitirodi ziyenera kugwiritsidwa ntchito pa kutentha kosiyanasiyana komanso zowononga.

Kulondola kwa kuyeza kwa electromagnetic flowmeter kumatengera momwe madzi amadzaza ndi chitoliro, ndipo vuto la kuyeza kwa mpweya mu chitoliro silinathetsedwe bwino.

Ubwino wa ma electromagnetic flowmeters: Palibe gawo lopumira, chifukwa chake kutsika kwamphamvu kumakhala kochepa, komanso kugwiritsa ntchito mphamvu kumachepetsedwa.Zimangogwirizana ndi liwiro lapakati lamadzimadzi omwe amayezedwa, ndipo muyeso woyezera ndi waukulu;media zina akhoza kuyeza kokha pambuyo mawerengedwe madzi, popanda kudzudzulidwa, ambiri Oyenera ntchito ngati metering chipangizo kukhazikikamo.Chifukwa cha kusinthika kosalekeza kwa teknoloji ndi zipangizo zamakono, kusinthika kosalekeza kwa bata, mzere, kulondola ndi moyo, ndi kukula kosalekeza kwa ma diameter a chitoliro, kuyeza kwazitsulo zolimba-zamadzimadzi zimagwiritsa ntchito maelekitirodi osinthika ndi ma electrodes kuti athetse vutoli. vuto.Kuthamanga kwambiri (32MPA), kukana dzimbiri (anti-acid ndi alkali lining) zovuta zoyezera, komanso kukula kosalekeza kwa caliber (mpaka 3200MM caliber), kuwonjezeka kosalekeza kwa moyo (nthawi zambiri kuposa zaka 10), maginito amagetsi. flowmeters akuchulukirachulukira Kugwiritsidwa ntchito Kwambiri, mtengo wake wachepetsedwa, koma mtengo wonse, makamaka mtengo wa mainchesi akulu a chitoliro, udakali wokwera, kotero uli ndi udindo wofunikira pakugula mita.

5. Akupanga flowmeter

Akupanga flowmeter ndi mtundu watsopano wa otaya muyeso chida chopangidwa masiku ano.Malingana ngati madzi omwe amatha kufalitsa phokoso amatha kuyesedwa ndi akupanga flowmeter;Akupanga flowmeter akhoza kuyeza otaya mkulu-akayendetsedwe akayendedwe madzi, sanali conductive madzi kapena mpweya, ndi muyeso Mfundo otaya mlingo ndi: ndi kafalitsidwe liwiro akupanga mafunde mu madzimadzi zidzasiyana ndi otaya mlingo wa madzimadzi akuyezedwa.Pakali pano, mkulu-mwatsatanetsatane akupanga flowmeters akadali dziko lakunja zopangidwa, monga Japan Fuji, United States 'Kanglechuang;zoweta opanga akupanga flowmeters makamaka monga: Tangshan Meilun, Dalian Xianchao, Wuhan Tailong ndi zina zotero.

Akupanga flowmeters nthawi zambiri sagwiritsidwa ntchito ngati zida zoyezera metering, ndipo kupanga sikungaimitsidwe m'malo pomwe malo owerengera awonongeka, ndipo amagwiritsidwa ntchito nthawi zambiri pomwe kuyezetsa magawo kumafunika kutsogolera kupanga.Ubwino waukulu wa akupanga flowmeters ndikuti amagwiritsidwa ntchito pamlingo waukulu wotaya muyeso (chitoliro ma diameter akulu kuposa 2 metres).Ngakhale mfundo zina za metering zimagwiritsidwa ntchito pokhazikika, kugwiritsa ntchito ma ultrasonic flowmeters apamwamba kwambiri kumatha kupulumutsa ndalama ndikuchepetsa kukonza.

6. Misa yothamanga mita

Pambuyo pa kafukufuku wazaka zambiri, mtundu wa U-shaped tube mass flowmeter unayambitsidwa koyamba ndi American MICRO-MOTION kampani mu 1977. Pamene flowmeter iyi inatuluka, inasonyeza mphamvu zake zamphamvu.Ubwino wake ndikuti chizindikiro chothamanga kwambiri chikhoza kupezedwa mwachindunji, ndipo sichimakhudzidwa ndi chikoka cha Parameter, kulondola ndi ± 0.4% ya mtengo woyezera, ndipo ena amatha kufikira 0.2%.Imatha kuyeza mitundu ingapo ya mpweya, zamadzimadzi ndi slurries.Ndikoyenera kwambiri kuyeza gasi wamafuta amafuta amafuta ndi gasi wachilengedwe wokhala ndi zotsatsa zabwino kwambiri, zowonjezeredwa The electromagnetic flowmeter siyokwanira;chifukwa sichimakhudzidwa ndi kugawa kwa liwiro la kuyenda kumbali yakumtunda, palibe chifukwa cha zigawo za chitoliro cholunjika kutsogolo ndi kumbuyo kwa flowmeter.Choyipa chake ndi chakuti misa flowmeter ili ndi kulondola kwapamwamba kwambiri ndipo nthawi zambiri imakhala ndi maziko olemetsa, chifukwa chake ndi okwera mtengo;chifukwa zimakhudzidwa mosavuta ndi kugwedezeka kwakunja ndipo kulondola kumachepetsedwa, samalani ndi kusankha kwa malo ake oyika ndi njira.

7. Vortex flowmeter

Vortex flowmeter, yomwe imadziwikanso kuti vortex flowmeter, ndi chinthu chomwe chinangotuluka kumapeto kwa zaka za m'ma 1970.Yakhala yotchuka kuyambira pomwe idayikidwa pamsika ndipo yakhala ikugwiritsidwa ntchito kwambiri kuyeza madzi, gasi, nthunzi ndi media zina.Vortex flowmeter ndi liwiro la flowmeter.Chizindikiro chotuluka ndi chizindikiro cha pulse frequency kapena chizindikiro chamakono chofanana ndi kuthamanga kwa kayendedwe kake, ndipo sichimakhudzidwa ndi kutentha kwamadzimadzi, kupanikizika, kukhuthala ndi kachulukidwe.Mapangidwe ake ndi osavuta, palibe magawo osuntha, ndipo chinthu chodziwikiratu sichikhudza madzi kuti ayezedwe.Ili ndi mawonekedwe olondola kwambiri komanso moyo wautali wautumiki.Choyipa ndichakuti gawo lina la chitoliro chowongoka limafunikira pakukhazikitsa, ndipo mtundu wamba ulibe njira yabwino yothetsera kugwedezeka ndi kutentha kwakukulu.Msewu wa vortex uli ndi mitundu ya piezoelectric ndi capacitive.Yotsirizirayi ili ndi ubwino wokana kutentha ndi kugwedezeka, koma ndiyokwera mtengo kwambiri ndipo imagwiritsidwa ntchito poyeza nthunzi yotentha kwambiri.

8. Mayendedwe a chandamale mita

Mfundo yoyezera: Pamene sing'anga imayenda mu chubu choyezera, kusiyana kwa mphamvu pakati pa mphamvu yake ya kinetic ndi mbale yomwe mukufuna kulowera kumapangitsa kuti mbaleyo isasunthike pang'ono, ndipo mphamvu yake idzakhala yofanana ndi kuthamanga kwake.Imatha kuyeza kuthamanga kwapang'onopang'ono, kuthamanga kwambiri (0 -0.08M/S), ndipo kulondola kumatha kufika 0.2%.