Kodi valve control ndi chiyani?
Avalve controlndi chinthu chomaliza chomwe chimagwiritsidwa ntchito kuwongolera kayendedwe ka madzi kudzera munjira.Amatha kuyenda mozungulira momasuka mpaka kutsekedwa kwathunthu.Valve yowongolera imayikidwa perpendicular to flow, wowongolera amatha kusintha kutsegulira kwa valve nthawi iliyonse pakati pa ON & OFF.
Zomwe zimakhudza kusankha ma valve:
Valve yowongolera ndiyofunikira pakugwira ntchito.Sikuti mafotokozedwe a valve okhawo ndi ofunika, komanso m'pofunika kuganizira mokwanira nkhani zina zokhudzana ndi valve yolamulira kuti igwire ntchito monga momwe ikufunira.Izi ndi mfundo zazikuluzikulu zomwe muyenera kukumbukira mukamatchula valavu yowongolera:
1. Njira Yolinga:
Ndikofunika kumvetsetsa bwino ndondomekoyi kuphatikizapo valve yolamulira.munthu ayenera kumvetsetsa mokwanira kuyambira ndi kutseka kwa ndondomeko yokha, kuphatikizapo khalidwe loyenera pazochitika zadzidzidzi.
2. Cholinga cha ntchito:
Chovala chowongolera chimagwiritsidwa ntchito pazifukwa zosiyanasiyana, Ma valve olamulira amagwiritsidwa ntchito poyang'anira mlingo mu thanki, palinso ma valve omwe amawongolera kutsika kwapansi kuchokera ku dongosolo lapamwamba kupita ku dongosolo lochepetsetsa.
Pali ma valve owongolera omwe amawongolera kudulidwa ndi kutulutsa madzi, kusakaniza madzi awiri, kulekanitsa kutuluka munjira ziwiri, kapena kusinthana madzi.Choncho, valavu yolamulira yoyenera kwambiri imasankhidwa pambuyo pozindikira zolinga za valve inayake.
3. Nthawi yoyankhira:
Nthawi yotengedwa kuti muyankhe ku valavu yolamulira pambuyo posintha chizindikiro chowongolera ndi nthawi yoyankhira valve yolamulira.Valavu yowongolera imakhala ndi nthawi yakufa tsinde la pulagi lisanathe kuthana ndi kukangana ndikuyamba kusuntha.Palinso nthawi yogwira ntchito yofunikira kuti musunthe mtunda wofunikira.M'pofunika kuganizira zotsatira za zinthu izi pa controllability ndi chitetezo cha dongosolo lonse.Kuti valavu yowongolera bwino, nthawi yoyankha iyenera kukhala yochepa.
4. Makhalidwe enieni a ndondomekoyi:
Tsimikizirani pasadakhale kukhalapo kapena kusapezeka kwa kudziyimira pawokha, kusiyanasiyana kwamitundu yofunikira, kuthamanga kwa kuyankha, ndi zina zambiri.
5. Zinthu zamadzimadzi:
Mikhalidwe yosiyanasiyana yamadzimadzi imatha kupezeka papepala la deta, ndipo izi zimakhala zofunikira pakusankhidwa kwa valve yolamulira.Zotsatirazi ndizo zikhalidwe zazikulu zomwe zidzagwiritsidwe ntchito:
- Dzina lamadzimadzi
- Zigawo, kapangidwe
- Mtengo woyenda
- Kupanikizika (pamadoko onse olowera ndi otuluka a valve)
- Kutentha·
- Viscosity
- Kachulukidwe (kukokera kwapadera, kulemera kwa molekyulu)
- Kuthamanga kwa nthunzi
- Mlingo wa kutentha kwambiri (nthunzi wamadzi)
6. Kusungunuka, makhalidwe apadera:
Munthu ayenera kudziwa kukhalapo kwa zoopsa zomwe zingatheke ponena za mtundu wa madzi, kuwononga, kapena matope.
7. Rangeability:
Ngati valavu imodzi yolamulira sichitha kupereka kusinthasintha kofunikira, kuganizira kugwiritsa ntchito ma valve awiri kapena kuposerapo kumakhala kofunikira.
8. Kuthamanga kwa ma valve:
Mlingo wa kutayika kwa ma valve owongolera pamapaipi ndi vuto lovuta.Pamene kuchuluka kwa kuthamanga kwa ma valve kumachepa poyerekeza ndi kutayika kwa mphamvu yonse ya dongosolo lonse, mawonekedwe othamanga omwe amaikidwa amachoka kuchoka kumayendedwe achibadwa.Ngakhale ndizosatheka kubwereza, mtengo wa PR pakati pa 0.3 ndi 0.5 nthawi zambiri umasankhidwa.
9. Kupanikizika kozimitsa:
Phindu lapamwamba la kupanikizika kosiyana pa nthawi yotseka valve yolamulira ndi deta yofunikira kuti igwiritsidwe ntchito posankha chowongolera komanso kuonetsetsa kuti mapangidwe amphamvu mokwanira pa gawo lililonse la valve yolamulira.
Mapangidwe omwe mphamvu yolowera imayikidwa yofanana ndi kuthamanga kwapamwamba kotsekera kumakhala kochuluka, koma njirayi ingapangitse kuti ma valve adziwe zambiri.Choncho m'pofunika kuganizira zinthu zenizeni zogwiritsiridwa ntchito pozindikira kukakamiza kotseka.
10. Kutayikira kwa mipando ya valve:
Ziyenera kutsimikiziridwa momveka bwino kuti kuchuluka kwa mipando yomwe ikutuluka imatha kulekeredwa panthawi yotseka ma valve.M'pofunikanso kudziwa mafupipafupi omwe vuto la kutsekedwa kwa valve kumachitika.
11. Ntchito ya valve:
Pali makamaka mitundu iwiri ya ntchito yowongolera valavu:
Kugwira ntchito molingana ndi chizindikiro cholowetsa valavu:Kutsegula ndi kutseka kwa valve kumasinthidwa molingana ndi momwe chizindikiro cholowera ku valve chikuwonjezeka kapena kuchepa, koma ntchitoyo siili yofanana ndi ntchito yolephera.Vavu ikatseka chifukwa cha kulowetsedwa kowonjezereka, izi zimatchedwa kuchitapo kanthu mwachindunji.Vavu ikatsegulidwa chifukwa cha kuwonjezeka kwa chizindikiro cholowera, izi zimatchedwa reverse action.
Opaleshoni yolephera:Kusuntha kwa ntchito ya valve kuli m'njira yotetezeka ya ndondomekoyi ngati chizindikiro cholowetsamo ndi mphamvu zowonongeka.Opaleshoniyo imatchedwa "kulephera kwa mpweya pafupi," "kutsegula," kapena "kutseka."
12. Kuteteza kuphulika:
Malingana ndi malo omwe valavu imayikidwa valavu yolamulira imafunika kuphulika kokwanira, magetsi onse omwe amagwiritsidwa ntchito ndi valve ayenera kukhala ndi umboni wa kuphulika.
13. Mphamvu zamagetsi:
Mphamvu ya pneumatic ku valve actuation iyenera kukhala yokwanira ndipo ndikofunika kupereka mpweya woyera ndi madzi, mafuta ndi fumbi kuchotsedwa kuti zigawo monga actuator ndi positioner zigwire ntchito popanda kulephera.Panthawi imodzimodziyo, munthu ayenera kudziwa mphamvu ya actuative ndi mphamvu kuti apeze mphamvu zokwanira zogwirira ntchito.
14. Kufotokozera kwa mapaipi:
Dziwani zambiri za mapaipi omwe valavu yowongolera imayikidwa.Zofunikira kwambiri zimaphatikizapo kukula kwa chitoliro, miyeso ya mapaipi, mtundu wa zinthu, mtundu wa kulumikizana ndi mapaipi, ndi zina zotero.
Nthawi yotumiza: Apr-06-2022