Kungani i-i-valve idivayisi kagesi avele overload phenomenon? Yiziphi izindlela zokuvikela?
I-Petrochemical, i-power station, i-metallurgy nezinye izimboni zidinga umjikelezo oqhubekayo, oshelelayo, nokusebenza komjikelezo omude. Ngakho-ke, kudinga ukusetshenziswa kwe-valve kufanele kube nokuthembeka okuphezulu, isici sokuphepha sikhulu, asikwazi ngenxa yokuthi ukwehluleka kwe-valve kubangele ukuphepha okukhulu kokukhiqiza kanye nengozi yokulimala komuntu siqu, ukuhlangabezana nemfuneko yokusebenza isikhathi eside kwemishini, ukukhiqizwa okuqhubekayo kuyinzuzo isikhathi eside, ngaphezu kwalokho, ukunciphisa noma ukugwema ngenxa yokuvuza kwe-valve, ukwakha izimboni ezihlanzekile neziphucuzekile, ukuqaliswa kokuphathwa kwe-HSE (impilo, ukuphepha, imvelo).
Okokuqala, isimiso sokukhetha i-valve
(1) Ukuphepha nokwethembeka
I-Petrochemical, i-power station, i-metallurgy nezinye izimboni zidinga umjikelezo oqhubekayo, oshelelayo, nokusebenza komjikelezo omude. Ngakho-ke, kudinga ukusetshenziswa kwe-i-valvekufanele ibe nokwethenjelwa okuphezulu, isici sokuphepha sikhulu, ayikwazi ngoba ukwehluleka kwe-valve kubangele ukuphepha okukhulu kokukhiqizwa kanye nengozi yokulimala komuntu siqu, ukuhlangabezana nemfuneko yokusebenza isikhathi eside kwemishini, ukukhiqizwa okuqhubekayo kuyinzuzo isikhathi eside, ngaphezu kwalokho. , ukunciphisa noma ukugwema ngenxa yokuvuza kwamavalvu, ukwakha izimboni ezihlanzekile neziphucuzekile, ukuqaliswa kokuphathwa kwe-HsE (impilo, ukuphepha, imvelo).
(2) Hlangana nezidingo zenqubo yokukhiqiza
I-valve kufanele ihlangabezane nokusetshenziswa kwe-medium, ingcindezi yokusebenza, izinga lokushisa lokusebenza kanye nezidingo zokusebenzisa, okuyizidingo eziyisisekelo kakhulu zokukhetha ama-valve. Ukuvikelwa ngokweqile kwe-valve, ukukhipha okuphakathi ngokweqile, kufanele kukhethe i-valve yokuphepha, i-valve yokusiza, isidingo sokuvimbela ukugeleza kwe-medium ngesikhathi sokusebenza, kufanele kusetshenziswe i-valve yokuhlola, i-othomathikhi isuse amapayipi omusi kanye nemishini enesidingo sokuqhubeka ukukhiqiza amanzi ajiyile, umoya kanye namanye amagesi angacondensable, ukuvimbela umusi ukuba uphunyuke futhi ngesikhathi esifanayo, kufanele ukhethe ugibe. Ngaphezu kwalokho, lapho okuphakathi kugqwala, impahla enokumelana nokugqwala okuhle kufanele kukhethwe.
(3) Ukusebenza okulula, ukufakwa, ukuhlola (ukulungisa) ukulungisa
Ngemuva kokuthi i-valve ifakiwe, opharetha kufanele akwazi ukukhomba kahle isiqondiso se-valve, uphawu lokuvula, olubonisa isignali, kulula ukubhekana namaphutha ahlukahlukene aphuthumayo ngesikhathi esifanele futhi esinqunyiwe. Ngesikhathi esifanayo, ekhethiwei-valveisakhiwo sohlobo kufanele sibe olulodwa ngangokunokwenzeka, ukufakwa kalula, ukuhlolwa (ukugcinwa) ukulungiswa.
(4) Umnotho
Ngaphansi kwesisekelo sokuhlangabezana nokusetshenziswa okujwayelekile kwamapayipi enqubo, ama-valve anezindleko eziphansi zokukhiqiza kanye nesakhiwo esilula kufanele akhethwe ngangokunokwenzeka ukuze kuncishiswe izindleko zemishini, kugwenywe ukumoshwa kwempahla eluhlaza yama-valve nokunciphisa izindleko zokufakwa kwama-valve kanye ukunakekelwa esikhathini esizayo.
Okubili, izinyathelo zokukhetha ama-valve
1. Thola isimo sokusebenza se-valve ngokuya ngokusetshenziswa kwayo kudivayisi noma ipayipi lenqubo. Isibonelo, i-work medium, ingcindezi yokusebenza kanye nezinga lokushisa lokusebenza.
2. Ngokwendlela yokusebenza, indawo yokusebenza kanye nezidingo zomsebenzisi ukuze kunqunywe izinga lokusebenza kokuvala kwevalvu.
3. Thola uhlobo kanye nemodi yokushayela ye-valve ngokusho kokusetshenziswa kwayo. Uhlobo olufana ne-truncation valve, i-valve elawulayo, i-valve yokuphepha, enye i-valve ekhethekile, njll. Shayela njengegiya lezikelemu, ugesi, i-pneumatic njalonjalo.
4. Khetha ngokuvumelana nemingcele ye-valve. Ukucindezela okulinganiselwe kanye nobukhulu be-valve kuzonqunywa ngokuhambisana nenqubo yokufaka amapayipi. I-valve ifakwe epayipini lenqubo, ngakho-ke isimo sayo sokusetshenziswa kufanele sihambisane nokukhetha komklamo wepayipi lenqubo, uhlelo olujwayelekile olusetshenziswa ipayipi kanye nokucindezela okulinganiselwe kwepayipi kunqunywa, ingcindezi ye-valve okuzisholo, usayizi wegama, ukwakheka kwe-valve namazinga okukhiqiza kunganqunywa. Amanye ama-valve asekelwe ekugelezeni kwesikhathi esilinganiselwe nge-valve noma ukugudluzwa kosayizi ovamile we-valve.
5. Nquma indlela yokuxhuma yobuso bokuphela kwe-valve kanye nepayipi ngokuvumelana nezimo zangempela zokusebenza kanye nosayizi ovamile we-valve. Njenge-flange, i-welding, i-clamping noma intambo, njll.
6. Ngokusho kwendawo yokufaka i-valve, indawo yokufaka, usayizi wegama lokunquma uhlobo lwesakhiwo sohlobo lwe-valve. Okufana ne-valve yesango elimnyama, i-Angle globe valve, i-valve yebhola engashintshi, njll.
7. Ngokwezici ze-medium, ingcindezi yokusebenza kanye nokushisa okusebenzayo, ukukhetha ngendlela efanele futhi ngokunengqondo ukwaziswa kwegobolondo le-valve nezingxenye zangaphakathi.
Kungani idivayisi kagesi ye-valve ibonakala igcwele ngokweqile? Yiziphi izindlela zokuvikela?
Idivayisi kagesi ye-valve iwukubona isilawuli se-valve, isilawuli esizenzakalelayo nesilawuli kude nemishini ebalulekile, inqubo yayo yokunyakaza ingalawulwa ngokushaya, i-torque noma usayizi we-axial thrust. Ngenxa yokuthi izici zokusebenza nezinga lokusebenzisa ledivayisi kagesi ye-valve lincike ohlotsheni lwe-valve, ukucaciswa kwedivayisi okusebenzayo kanye nendawo ye-valve epayipini noma emishinini, ngakho-ke, ukukhethwa okufanele kwedivayisi kagesi ye-valve kubaluleke kakhulu ukuvimbela. into yokulayisha ngokweqile (i-torque esebenzayo iphakeme kune-torque yokulawula). Nokho, ingalayishwa ngokweqile uma:
1, amandla aphansi aphansi, awakwazi ukuthola i-torque edingekayo, ukuze injini iyeke ukujikeleza.
2, isetha ngokungalungile indlela yomkhawulo we-torque, ukuze ibe nkulu kunetorque yokumisa, okuholela ekukhiqizeni okuqhubekayo kwetorque enkulu kakhulu, ukuze injini iyeke ukujikeleza.
3, njengephuzu lokusetshenziswa kwezikhawu, ukushisa okukhiqizwe phezulu, ngaphezu kwezinga lokushisa elivumelekile lemoto.
4, ngesizathu esithile itorque ekhawulela ukwehluleka kwesekethe, ukuze itorque ibe nkulu kakhulu.
I-5, ukusetshenziswa kokushisa kwe-ambient kuphezulu kakhulu, kuqhathaniswa nokwenza umthamo wokushisa wemoto wehle.
Lokhu okungenhla ngezinye zezizathu zokulayisha ngokweqile, ngenxa yalezi zizathu isenzakalo sokushisa kwemoto kufanele sicatshangelwe kusengaphambili, futhi sithathe izinyathelo zokuvimbela ukushisa ngokweqile. Esikhathini esidlule, indlela yokuvikela i-motor ukusebenzisa ama-fuses, ama-overcurrent relays, ama-thermal relays, amadivaysi e-thermostatic, njll., kodwa lezi zindlela nazo zinezinzuzo zazo kanye nokubi. Emishinini kagesi enomthwalo oguquguqukayo, ayikho indlela yokuvikela ethembekile.
Ngakho-ke, inhlanganisela yezindlela kufanele yamukelwe. Kodwa-ke, ngenxa yomthwalo ohlukile wedivayisi ngayinye kagesi, kunzima ukubeka phambili indlela ebumbene. Kodwa ngokwengxenye enkulu, isisekelo esivumelana ngaso singatholakala.
Izindlela zokuvikela ukugcwala ngokweqile ezamukelwayo zingafingqwa zibe izinhlobo ezimbili:
1. Yahlulela ukwanda noma ukuncipha kwamandla okufaka amandla;
2. Yahlulela ukushisa kwenjini ngokwayo. Izindlela ezimbili ezingenhla, kungakhathaliseki ukuthi yikuphi okufanele kucatshangelwe umthamo wokushisa wemoto onikezwe umkhawulo wesikhathi. Kunzima ukuyenza ihambisane nezici zomthamo wokushisa wemoto ngendlela eyodwa.
Ngakho-ke, kufanele sikhethe inhlanganisela yezindlela ezisuselwe esenzweni esinokwethenjelwa ngokuya ngembangela yokulayisha ngokweqile ukuze sithole ukuvikelwa kokulayisha ngokweqile. I-motor yedivayisi kagesi ye-Rotock, ngoba ishumekwe emaphethelweni e-thermostat ngezinga elifanayo lokufakwa kwe-motor, lapho izinga lokushisa elilinganiselwe lifinyelelwa, i-loop yokulawula imoto izonqanyulwa. Umthamo wokushisa we-thermostat ngokwayo mncane, futhi izici zayo ezinqunyelwe isikhathi zinqunywa izici zamandla okushisa we-motor, ngakho-ke lena indlela ethembekile.
Izindlela zokuvikela eziyisisekelo zokulayisha ngokweqile yilezi:
1, ukusebenza okuqhubekayo kwe-motor noma ukusebenza kwephoyinti lokuvikela ukugcwala ngokweqile kusetshenziswa i-thermostat;
2. I-thermal relay isetshenziselwa ukuvikela ukuvinjwa kwezimoto
3. I-Fuse noma i-overcurrent relay isetshenziselwa ingozi yesifunda esifushane. Ukukhetha okulungile kwedivayisi kagesi ye-valve kanye nokuvimbela ukugcwala ngokweqile kuhlobene futhi kufanele kunakwe.
Isikhathi sokuthumela: Jun-23-2022
