Vortex Flowmeter: wani manufa na mataki

Vortex flowmeters su ne bisa lissafi na periodicity na canji a matsa lamba, wanda aka kafa a cikin kwarara bayan wani tarnaki a cikin bututun, ko kuma a cikin shakka daga vibrations da vortex zubar kwarara.

girma

A farko na'urar da irin wannan bayyana a cikin 60s na karshe karni. Su main hasara shi ne kananan kewayon ji sigogi da kuma gagarumin kuskure. Lantarki zamani vortex flowmeter ya zama mafi nagartaccen, m kuma sami abũbuwan amfãni mãsu yawa, wadda ya kamata hada da wadannan:

• da dangi sauki daga cikin tsarin na ji.
• data ne ko da yaushe a barga, ba ya dogara ne a kan zafin jiki da kuma samuwa matsa lamba;
• ji, halin da high daidaituwa.
• da aunawa mikakke sakonni.
• robust da kuma sauki zane.
• fadi da ma'auni a zangon.
• canzawa abubuwa.
• da gaban da kai-ganewar asali aiki a kan wasu model.

shortcomings

Rosemount vortex Flowmeter tsara aiki a bututu tare da wani diametrical size of 20 zuwa 300 mm, kamar yadda bututu tare da wani karami bambanta m vortex samuwar, da kuma aiki a isasshe high adadin wuya. Kamar wancan akwai wani yiwuwar amfani a low kwarara rates, saboda haduwar da sigina ji kuma wani gagarumin raguwa a matsa lamba. Har ila yau vibration da kuma sauti iri ripple rinjayen aiki na da na'urar. Kamar yadda fašakarwar wuriyar abubuwa a matsayin kutse da kuma compressors. Su kawar da zai yiwu da straightening vane, saka a mashiga, ko shigar da ƙarin drive dangane da kanta da kuma lantarki tace a cikin hali na da bambance-bambance na ji sakonni da kuma pulsation mita.

rarrabuwa

Akwai uku bambance-bambancen karatu da na'urori ana rabu da irin Converter:

• Vortex flowmeter, cikinsa da immovable jiki taka rawar da primary na'urar. A hankali, a kan ko dai gefen shi kafa vortices zuwa gardama bayan da real jiki kewaye, saboda wanda kuma kafa ripple.
• Sassan da juyawa rafi na gabansa na'urar, wanda halitta matsa lamba pulsation saboda da tallafi na mazurari-dimbin yawa a cikin kumbura rabo daga cikin bututun.
• Vortex flowmeters, tare da wani rafi a matsayin Converter. A wannan yanayin, matsa lamba pulsation na jiragen sama bayar vibrations.

A farko iri biyu daga cikin kayan ƙara fit da definition a vortex flowmeter. Amma saboda da m yanayin da uku irin hijirar da kwarara, shi kuma ya shafi category. A mafi girma kama da halaye lura a kan aiwatar da nassi na farko da kuma na uku embodiment.

Flowmeter vortex biyu tare da wani streamlined Converter

Lokacin da jiki ne kewaye da kwarara hanyar shugabanci canza jirage, lokaci guda kara da gudu da kuma matsa lamba saukad. A baya canji yakan faru bayan da tsakiyar sashe daga cikin abu. A ta baya gefen Forms low matsa lamba, da kuma a gaban - high. Bayan wucewa ta cikin iyaka Layer ya fita daga jiki, kuma a ƙarƙashin rinjayar low matsawa Halicci vortex, da kuma lokacin da canza yanayin. Wannan shi ne hali na biyu da streamlined jiki hannun jari. Aiwatar da alternating samuwar vortices a garesu, saboda su tsoma baki tare da samuwar juna. Duk da yake abin lura da halittar Karman hanya.

Special jiki Kintsa ya aiki jirage da kai-tsaftacewa saboda da vortices, ko da nauyi gurbata muhallin, su ne ko da yaushe tsabta.

Girma da rapidity kwarara kai tsaye na gwargwado ga aukuwar vortices, wanda yayi dace da sauri a m size, sabili da haka da girma kwarara. Idan wani barga vortex samuwar auku a low kwarara rates of abu, sa'an nan da flowmeter ji kewayon 20 l / min.

A nata irin zane na jiki

Counter vortex flowmeter aka kullum bisa wani trapezoidal prismatic kashi, triangular ko rectangular form. A yi na farko embodiment ne zuwa ga ruwa ya kwarara. Ba wani matsin lamba hasara irin wannan abubuwa kafa oscillations da isa tsari da kuma iko. Bugu da kari, musamman saukaka bikin a cikin hira da fitarwa sakonni.

Vortex flowmeter a wasu lokuta na iya amfani da biyu streamlined na'urar for kara fitarwa sakonni, wanda idan aka shirya a wani tsayayyen nesa. A gefe na biyu rectangular prisms Are piezoelectric, boye na roba bakin ciki membranes, game da shi, samarwar da damar rinjayar da Ft Irfan amo.

iri Abubuwan Taɗi

Akwai hanyoyi da dama don maida da fitarwa sakonni na Eddy canje-canje. A mafi yadu samu gudun gudana streamlined abubuwa da tsanaki canje-canje a matsa lamba. A gabansa kashi ne daya ko biyu conductive thermal anemometer irin. Used dan tayi, hadawa, capacitive da inductive kwarara transducer. Domin yin aiki da kyau na vortex flowmeter dole ne a free lebur na bututu kafin sauran.

Matsalolin Aiki a bututu tare da wani ƙara diamita lalacewa ta hanyar da wadannan dalilai:

• Zubar da rage tsari.
• Zubar low yawan aiki.
• rage a cikin adadin oscillations.

A mazurari-dimbin yawa vortex flowmeters: da manufa na mataki

A cikin wadannan na'urorin mallaka converters inji for Tuddan rafi daukar kwayar cutar ta hanyar wani rabo daga cikin bututun a Extended gefe ko ta hanyar kananan cylindrical bututun ƙarfe. Samar da mazurari aka kafa a cikin tube, da kuma kewaye da ta axis rotates game da wani axis motsi da shi da vortex core. Da ya kwarara a cikin sama ɓangare yana da wani matsin lamba pulsing lokaci guda tare da mai kusurwa yunkuri na tsakiya, yayin da shi ne daidaita da girma kwarara kudi ko mikakke gudu. Conductive thermoanemometers ko electromechanical memba tuba gudu ko mita na pulsations ga ma'auni tashoshi. A tsari ya shafi biyu bulan: na farko canja wurin volumetric kwarara da aka kafa a cikin vortex precession mita ne sai ya canza kama zuwa mita sigina.

Flowmeter dangane da oscillating jiragen sama

Wucewa ta cikin bututun ƙarfe, da gas ko ruwa rafi ne diffuser da giciye sashe a cikin wani nau'i na murabba'i mai dari. A wasu lokuta, da ya kwarara a nuna an guga man a wani batu don daban-daban ganuwar da diffuser. Electrifying dukiya jiragen sama shakatawa na'urar rage matsi a cikin sama yankin na kewaye da sarewa, da yayin da a kasa na ta kasance iri guda da kuma haifar da wani motsi ɗauke da rafi a cikin ƙananan ɓangare na diffuser. Bayan da bututu a cikin baki yanayi zirga-zirga canje-canje, zo oscillating jet.

Jet raini da a kasa na diffuser kashi a converters na'ura mai aiki da karfin ruwa komawa dangane bututu ke ta outputting kawai partially. A bugun jini babba tashar kasaftawa rabo na jet kuma yayin wucewa ta farko bututun ƙarfe, shi da aka canjawa wuri zuwa ƙananan matsayi a cikin rafi daga na biyu bututun ƙarfe. Sa'an nan rabu da kuma wani ɓangare na Saide a bugun jini babba tashar, da oscillation aiwatar auku bin switchover saukar, yayin da a can ne a lokaci daya canji na matsin lamba a garesu daga cikin rafi.

A inverter na irin wannan ne mafi m. Saboda tsananin shi ne kafa da oscillation bugun jini ne gabatar da tasiri kai tsaye a kan kudi na oscillation mita.

A mafi yadu amfani Yokogawa vortex flowmeters samu a cikin bututu tare da karamin diamita zuwa a kalla 90 mm. A wasu lokuta, na'urorin na irin wannan aka yi amfani a matsayin m maye converters.

Yau, da ingancin kwarara daga masana'antu ne kullum gwamnatin da akwai sabon fasali, duk da cewa irin wannan na'urorin da fairly dogon lokaci na amfani. Developers suna neman karin tasiri zane mafita haifar da fasaha zažužžukan a cikin wani more yadda ya dace.