Ifanele ifakwe njani i-electromagnetic flowmeter?

Ukufakelwa kwei-flowmeter ye-electromagnetickufuneka ilandele ngokungqongqo iinkcukacha ukuqinisekisa ukuchaneka kokulinganisa kunye nokuzinza kwexesha elide. Nazi amanyathelo abalulekileyo okufakela kunye nokhuseleko:

1. Ukukhetha Indawo Yokufaka

• Imeko yePhayiphi epheleleyo
  Qinisekisa ukuba i-flowmeter isoloko ikwimeko epheleleyo yombhobho. Kuphephe ukuyifaka kwindawo ephezulu yombhobho okanye kwiindawo apho igesi inokuqokelelwa khona. Kwimbhobho ethe tye, i-sensor kufuneka ifakwe ngaphezulu kwe-axis ephakathi yombhobho (ukuthintela ukungcoliseka kokungcola ezantsi).
• Iimfuneko zeCandelo leMibhobho eQondileyo
• Icandelo lombhobho othe tye onyukayo: ≥ ubukhulu bombhobho buphindwe ka-5 ukuya kwi-10 (kuxhomekeke kwimeko yeevalvu kunye neengqiniba).
• Icandelo lemibhobho ethe tye ezantsi: ≥ ubukhulu bombhobho buphindwe kathathu ukuya kahlanu.
  Umzekelo: Kwipayipi ye-DN100, umsinga ongaphezulu kufuneka uqinisekise ukuba icandelo lombhobho othe tye liyi-500 ukuya kwi-1000mm.
• Ukuphepha Imithombo Yokuphazamisa
  Zigcine kude nezixhobo ze-electromagnetic field ezinamandla ezifana neemoto ezinkulu kunye neetransformer, ugcine umgama ubuncinane wemitha e-1.

2. Iimfuno zoQhagamshelo lweMibhobho

• Uqhagamshelo lweFlange
  Qinisekisa ukuba umphezulu weflange uthe tyaba kwaye usebenzise i-sealing gasket (izinto ezisetyenzisiweyo mazihambelane ne-medium elinganisiweyo).
  Qinisa iibholithi ngokulinganayo ukuze uphephe ukuvuza okubangelwa ngamandla angalinganiyo.
• Ukufaniswa kobubanzi bepayipi
  Ububanzi be-flowmeter bufanele buhambelane nobo bombhobho. Ukuba kufuneka utshintsho lobubanzi, sebenzisa umbhobho wokunciphisa okanye ukwandisa (i-engile yekhowuni ≤ 15°).
• Iimfuneko zokuGcina isiseko
  Isensor kufuneka isekelwe ngokwahlukileyo, kwaye ukumelana nokumisa umhlaba kube < 10Ω.
  Ukuba umbhobho wenziwe ngezinto zokukhusela (ezifana neplastiki), kufuneka kufakwe isangqa sokumisa phezulu nasezantsi.

3. Isikhokelo sokufakelwa kweSensor

• Ufakelo oluthe tye
  I-axis ye-electrode kufuneka ibe ngqindilili ukuthintela ukuqokelelwa kwamaqamza ekuchaphazeleni umlinganiselo (njengoko kubonisiwe kuMfanekiso 1).
• Ufakelo oluthe nkqo
  Ulwelo kufuneka luhambe ukusuka ezantsi ukuya phezulu ukuqinisekisa ukuba umbhobho ugcwele kwaye kuthintelwe ukugcwala kwamasuntswana (njengoko kubonisiwe kuMfanekiso 2).

4. Uqwalaselo lweeValvu zangaphambili nezasemva

• Ivalvu Ephezulu
  Umgama ukusuka kwisensor kufuneka ube ≥ ngokuphindwe kahlanu ubukhulu bombhobho. Kucetyiswa ukuba usebenzise ivalvu yesango kwaye uphephe ukusebenzisa ivalvu yebhabhathane (enokubangela ukusasazwa kwesantya sokuhamba esingalinganiyo).
• Ivalvu esezantsi
  Xa isetyenziselwa ukulawula ukuhamba kwamanzi, kufuneka igcine umgama ophindwe kathathu kunobubanzi bombhobho ukusuka kwisensor.

5. Inqanaba loKhuseleko kunye neNdalo

• Ukhetho lwe-IP Rating
• Kwiindawo ezingaphakathi ezomileyo: IP65 (engangeni thuli kwaye ingatshizi).
• Kwiindawo ezingaphandle okanye ezifumileyo: IP68 (ingangeni uthuli ngokupheleleyo kwaye ingangeni manzi).
• Ubushushu kunye nokufuma
• Ubushushu obuphakathi: -25°C ukuya kuma-60°C (jonga iphepha leenkcukacha zesixhobo).
• Umswakama: ≤ 95%RH (akukho kufuma).

6. Uqhagamshelo loMbane

• Ukukhusela iintambo
  Intambo yesignali kufuneka isebenzise umaleko okhuselayo kabini kwaye ikhuselwe ngumbhobho wentsimbi owahlukileyo. Kuphephe ukuyibeka ngakwintambo yombane.
• Inkcazelo yokuGcina iMihlaba
  Iqokobhe langaphandle lesensor, iqokobhe langaphandle le-converter, kunye nomaleko wokukhusela intambo kufuneka zisekelwe ngokuqinileyo. Akuvumelekanga ngokupheleleyo ukwabelana ngocingo lomhlaba nezinye izixhobo.

7. Ukulungisa iimpazamo kunye nokwamkela

1. Ukulinganiswa kweSimo seZero
   Xa umbhobho uzaliswe lulwelo kodwa kungekho manzi aphumayo, yenza uhlengahlengiso olungekhoyo (vala iivalvu ezisezantsi neziphezulu).
2. Ukulinganiswa kweNqanaba lokuhamba
   Kwindlela yokuqala yokusetyenziswa okanye emva kokulungiswa, kuyacetyiswa ukuba kwenziwe umlinganiselo wokuhamba kwamanzi kusetyenziswa indlela yevolumu okanye indlela yemitha esemgangathweni.
3. Ukusombulula iingxaki zempazamo

• Jonga amandla esignali (kufuneka ibe yi-> 80% phantsi kweemeko eziqhelekileyo).
• Vavanya ukumelana nobushushu be-electrode (kufuneka ibe yi-> 20MΩ).
• Jonga ukuba i-grounding loop iyaqhuba na.

IiTaboos zoFakelo

1. Kuphephe Uxinzelelo Olubi
   Umbhobho osezantsi akufuneki ube phezulu kunomngxuma wokuphuma kwe-flowmeter ukuthintela ukuba i-lining ingonakaliswa yingcinezelo engalunganga ebangelwa yi-siphon.
2. Imidiya Engavumelekanga Yokuphosa
   Xa uxinzelelo lwe-chloride ion kwindawo elinganisiweyo luyi-> 400ppm, kufuneka kukhethwe i-Hastelloy electrode okanye i-tantalum electrode.
3. Ingqalelo kwiindawo ezingaxhathisi ukuqhuma
   Ukuba ifakwe kwindawo engenakuqhushumba, kufuneka kukhethwe isixhobo esikhuselekileyo ngokwangaphakathi esihambelana nesatifikethi se-ATEX okanye se-IECEx.