Ukusetha ipharamitha eyisisekelo yedivayisi kagesi ye-valve

Ukusetha ipharamitha eyisisekelo yedivayisi kagesi ye-valve

Mayelana namavalvu asekhaya, amamodeli amavalvu alandelayo angabhekiselwa kuwo:1.Ivalvuuhlobo lwekhodi Z, J, L, Q, D, G, X, H, A, Y, S ngokulandelana: i-valve yesango, i-globe valve, i-throttle valve, i-valve yebhola, i-butterfly valve, i-diaphragm valve, ipulaki valve, i-valve yokuhlola, ukuphepha i-valve, i-valve yokunciphisa ingcindezi, i-trap 2. Ikhodi yokuxhuma i-valve 1, 2, 4, 6, 7 ngokulandelana: 1 intambo yangaphakathi, intambo yangaphandle engu-2, i-flange engu-4, i-welding engu-6, i-7 pair clamp 3. Imodi yokudlulisa yekhodi ye-valve 9, 6, 3 ngokulandelana:
Ngokuya ngama-valve asekhaya, ungabheka amamodeli alandelayo ama-valve:
1. Ikhodi yohlobo lwevalvu Z, J, L, Q, D, G, X, H, A, Y, S ikhonjisiwe ngokulandelana:
I-valve yesango, i-globe valve, i-throttle valve, i-valve yebhola, i-butterfly valve, i-diaphragm valve, ipulaki valve, i-valve yokuhlola, i-valve yokuphepha, i-valve yokunciphisa ingcindezi, i-valve yesicupho
2. Ikhodi yohlobo lokuxhuma i-valve 1, 2, 4, 6, 7 ngokulandelana:
1 intambo yangaphakathi, 2 intambo yangaphandle, 4 flanges, 6 welds, 7 amapheya eziqeshana
3. Imodi yokudlulisa yekhodi yevalvu 9, 6, 3 ngokulandelanayo:
9 kagesi, 6 i-pneumatic, 3 worm
4. Amakhodi wezinto ezibonakalayo zomzimba we-valve Z, K, Q, T, C, P, R, V ngokulandelana:
Insimbi eyinsimbi empunga, insimbi ethambile ethambile, ithusi ne-alloy, insimbi ye-carbon steel, insimbi engagqwali ye-chromium-nickel, i-chromium-molybdenum stainless steel, i-chromium-molybdenum vanadium steel
5. Isihlalo sophawu noma ikhodi yomugqa R, T, X, S, N, F, H, Y, J, M, W ngokulandelanayo
Ukusetha amapharamitha ayisisekelo wedivayisi kagesi ye-valve
I-actuator kagesi ye-valve
Idivayisi kagesi ye-valve iyithuluzi lokushayela elibalulekile ukuze ukwazi ukulawula uhlelo olukude, ukulawula okuzenzakalelayo nokulawula kude kwe-valve. Inqubo yayo yokunyakaza ingalawulwa nge-stroke, i-torque noma i-axial thrust. Ngoba izici zokusebenza kwedivayisi kagesi ye-valve kanye nokusetshenziswa kuncike ohlotsheni lwe-valve, imininingwane esebenzayo yedivayisi kanye nendawo ye-valve epayipini noma impahla.
Idivayisi kagesi ngokuvamile iqukethe izingxenye ezilandelayo:
** i-motor ibonakala ngomthamo oqinile wokugcwala, i-torque enkulu yokuqala, umzuzu omncane we-inertia, isikhathi esifushane, umsebenzi wezikhawu.
Indlela yokunciphisa yokunciphisa isivinini sokuphuma kwemoto.
Indlela yokulawula i-stroke ukulungisa nokulawula ngokunembile indawo yokuvula nokuvala ye-valve.
Indlela yokukhawulela i-torque yokulungisa i-torque (noma i-thrust) ibe inani elinqunywe kusengaphambili.
Umshini wokushintsha owenziwe ngesandla nokagesi, umshini wokuxhumanisa wokusebenza okwenziwa ngesandla noma kagesi.
Inkomba yokuvula ibonisa isikhundla se-valve ngesikhathi sokuvula nokuvala.
Okokuqala, khetha i-actuator kagesi ngokohlobo lwe-valve
1. I-Angle stroke actuator kagesi (i-Angle 360 ​​degrees) ifanele i-butterfly valve, i-valve yebhola, i-plug valve, njll.
Ukuzungezisa kwe-shaft ephumayo ye-actuator kagesi kungaphansi kwesonto elilodwa, okungukuthi, ngaphansi kwama-degree angu-360, ngokuvamile ama-degree angu-90 ukuze kubonakale ukulawulwa kwenqubo yokuvula nokuvala. Lolu hlobo lwe-actuator kagesi luhlukaniswe ngohlobo lokuxhuma oluqondile kanye nohlobo lwe-crank eyisisekelo ngokuya ngemodi yokufaka ehlukile yokufaka.
A) Okuxhunywe ngokuqondile: kubhekisela ohlotsheni lokufakwa okuxhunywe ngokuqondile kwe-shaft ephumayo ye-actuator kagesi kanye nesiqu se-valve.
B) Uhlobo lwe-Base crank: lubhekisela esimweni lapho i-shaft ephumayo ixhunywe khona nesiqu se-valve ngokusebenzisa i-crank.
2. I-Multi-rotary actuator kagesi (i-Angle 360 ​​degrees) ifanele ama-valve esango, ama-globe valves, njll.
Ukujikeleza kwe-shaft okukhiphayo ye-actuator kagesi kukhulu kunesonto elilodwa, okungukuthi, kukhulu kune-360 degrees. Ngokuvamile idinga umbuthano ongaphezu kwesisodwa ukuze ibone ukulawulwa kwenqubo yokuvula nokuvala kwe-valve.
3. I-stroke eqondile (ukunyakaza okuqondile) ifanele i-valve yokulawula isihlalo esisodwa, i-valve yokulawula izihlalo ezimbili, njll.
Ukunyakaza kwe-shaft ephumayo ye-actuator kagesi ukunyakaza okuqondile, hhayi ukujikeleza.
Okwesibili, ngokwezidingo zokulawula inqubo yokukhiqiza ukucacisa imodi yokulawula ye-actuator kagesi
1. Ukushintsha uhlobo (open loop control)
Ukushintsha ama-actuator kagesi ngokuvamile kuyaqaphela ukulawula noma ukuvala i-valve. I-valve isendaweni evuleke ngokugcwele noma isendaweni evalwe ngokugcwele. Lolu hlobo lwe-valve aludingi ukulawula ngokunembile ukugeleza okuphakathi.
Kuhle kakhulu ukusho ukuthi ukushintsha ama-actuator kagesi nakho kungahlukaniswa ngesakhiwo esihlukanisayo kanye nesakhiwo esihlanganisiwe ngenxa yezinhlobo ezahlukene zesakhiwo. Lokhu kufanele kuchazwe lapho kukhethwa uhlobo, ngaphandle kwalokho kuvame ukwenzeka ohlelweni lokufakwa nokulawula kwensimu *** nokunye ukungafani.
A) Isakhiwo sokuhlukanisa (ngokuvamile esibizwa ngokuthi uhlobo oluvamile) : iyunithi yokulawula ihlukaniswa ne-actuator kagesi. I-actuator kagesi ayikwazi ukulawula i-valve ngokuzimela, kodwa kufanele ilawulwe yiyunithi yokulawula yangaphandle. Ngokuvamile, isilawuli sangaphandle noma ikhabhinethi yokulawula isetshenziselwa ukusekela.
Ububi balesi sakhiwo ukuthi akulula ukufakwa okuphelele kwesistimu, ukwandisa izindleko zezintambo nokufaka, futhi kujwayele ukwehluleka, lapho ukwehluleka kwenzeka, akulula ukuxilongwa nokugcinwa, ukonga imali akulungile. .
B) Isakhiwo esihlanganisiwe (esivame ukubizwa ngokuthi uhlobo olubalulekile) : iyunithi yokulawula kanye ne-actuator kagesi zipakishwa zizonke, ezingasetshenzwa endaweni ngaphandle kweyunithi yokulawula yangaphandle, futhi ingaqhutshwa ukude kuphela ngokukhipha ulwazi lokulawula olufanele.
Izinzuzo zalesi sakhiwo ukufakwa kwesistimu yonke elula, ukunciphisa izindleko zezintambo nokufaka, ukuxilongwa okulula nokuxazulula izinkinga. Kodwa-ke, imikhiqizo yesakhiwo esihlanganisiwe yendabuko nayo inokungapheleli okuningi, ngakho-ke i-actuator kagesi ehlakaniphile ikhiqizwa.
2. Uhlobo olungalungiseka (ukulawula iluphu evaliwe)
I-actuator kagesi elawulayo ayinayo kuphela umsebenzi wokushintsha uhlobo lwesakhiwo esihlanganisiwe, kodwa futhi ingakwazi ukulawula ngokunembile i-valve futhi ilungise ukugeleza okuphakathi.
A) Lawula uhlobo lwesiginali (yamanje, i-voltage)
Isiginali yokulawula ye-actuator kagesi elawulayo ngokuvamile inesiginali yamanje (4 ~ 20mA, 0 ~ 10mA) noma isignali kagesi (0 ~ 5V, 1 ~ 5V). Uhlobo namapharamitha wesiginali yokulawula kufanele kucace lapho kukhethwa uhlobo.
B) Ifomu lokusebenza (ugesi ohlotsheni, uhlobo oluvaliwe ugesi)
Imodi yokusebenza ye-actuator kagesi elawulayo ngokuvamile iwuhlobo oluvulekile lukagesi (kuthatha ukulawula kwe-4 ~ 20mA njengesibonelo, uhlobo oluvulekile lukagesi lubhekisela kusiginali ye-4mA ehambisanayo yi-valve evaliwe, i-valve ehambisanayo engu-20mA evulekile), kanti enye uhlobo oluseduze lukagesi (uthatha ukulawula kwe-4-20MA njengesibonelo, uhlobo oluvulekile lukagesi lubhekisela esignali ehambisanayo ye-4mA i-valve evulekile, i-valve engu-20mA ehambisanayo ivala). I-electrode engagqoki
C) ukulahlekelwa ukuvikelwa kwesignali
Ukulahlekelwa ukuvikelwa kwesignali kubhekisela ekulahlekelweni kwesignali yokulawula ngenxa yamaphutha emigqa, i-actuator kagesi izolawula i-valve evulekile futhi isondele kunani lokuvikela elibekiwe, inani lokuvikela elivamile livuleke ngokugcwele, livalwe ngokugcwele, gcina ku-situ izimo ezintathu.
Okwesithathu, ngokuya ngokusetshenziswa kwemvelo kanye nokuhlukaniswa kwebanga lokufaka ubufakazi bokuqhuma kwamadivayisi kagesi
Ngokwezidingo zendawo yokusetshenziswa kanye nebanga lokufakazela ukuqhuma, idivayisi kagesi ye-valve ingahlukaniswa ngohlobo olujwayelekile, uhlobo lwangaphandle, uhlobo olungashi, uhlobo lwangaphandle lwe-flameproof.
Nquma i-torque ephumayo ye-actuator kagesi ngokuya ngetorque edingwa yivalvu
Ukuvula nokuvala i-torque edingekayo kunquma i-torque ephumayo ye-actuator kagesi ukuze ikhethe ukuthi, ngokuvamile ibekwa kanjani phambili ngumsebenzisi noma ngomkhiqizi wamavalvu afanayo, njengoba umenzi we-actuator enesibopho kuphela nge-torque ephumayo yama-actuator, ukuvulwa nokuvala kwe-valve evamile. i-torque edingekayo inqunywa usayizi wobubanzi be-valve kanye nokucindezela kokusebenza, kodwa ngenxa yokunemba kokucubungula komkhiqizi we-valve, inqubo yokuhlanganisa, Ngakho-ke, i-torque edingwa yizilinganiso ezifanayo zama-valve akhiqizwa abakhiqizi abahlukene nayo ihlukile, noma ngabe ihlukile. ukucaciswa okufanayo kwama-valve akhiqizwa umkhiqizi ofanayo we-valve. Uma i-actuator ikhethiwe, ukukhetha kwe-torque kuncane kakhulu ukubangela ukuvuleka nokuvala okuvamile kwe-valve, ngakho-ke i-actuator kagesi kufanele ikhethe uhla olufanele lwe-torque.
Okwesine, ukukhetha okulungile kwesisekelo sedivayisi kagesi ye-valve:
I-torque esebenzayo: i-torque esebenzayo iyipharamitha eyinhloko yedivayisi kagesi ye-valve, i-torque ephumayo yedivayisi kagesi kufanele ibe izikhathi ezingu-1.2 ~ 1.5 ze-torque enkulu yokusebenza kwe-valve.
I-Operation thrust: kunezakhiwo ezimbili eziyinhloko zedivayisi kagesi ye-valve: eyodwa ayinayo i-thrust plate, i-torque ephumayo eqondile; Enye ifakwe i-thrust disc, i-torque ephumayo nge-thrust disc stem nut iguqulelwe ku-output thrust.