Ukusetyenziswa kwesibekeli-valve esikrelekrele kwinkqubo yolawulo oluzenzekelayo lwesityalo sepetrochemical Uhlalutyo lwesimo sevalvu ekrelekrele kunye nohlalutyo lwemposiso eqhelekileyo

Ukusetyenziswa kwe-valve ekrelekrele yokubeka indawo kwinkqubo yokulawula ngokuzenzekelayo yesityalo se-petrochemical Uhlalutyo lwendawo yevalve ekrelekrele kunye nohlalutyo lwemposiso eqhelekileyo Kwinkqubo yolawulo oluzenzekelayo lweplanti yepetrochemical, ukukhethwa kwevalve yokulawula kubaluleke kakhulu ukuchaneka, ukusetyenziswa kwayo kuchaphazela umgangatho weemveliso, kwaye inxulumene nokhuseleko lwemveliso yezityalo. Isityalo seDushanzi VINYL isixhobo ngasinye sisetyenziselwe iivalvu zokulawula kuquka abavelisi abahlukeneyo beentlobo ezahlukeneyo zeemveliso. Kodwa uninzi lwesilawuli esifakiweyo luhlobo oluqhelekileyo lwendawo yokubeka ivalve. FIELDVUE isiphawuli sevalvu ekrelekrele eveliswe nguFISHER-ROSEMOUNT Inkampani ngoku isetyenziswa kumzi-mveliso waseDushanzi. Emva konyaka omnye wokusebenza, ukusebenza, ukusetyenziswa, ukusebenza kunye nomlinganiselo wexabiso le FIELDVUE isiphawuli sevalve ekrelekrele ithelekiswa nezo zesiqhelo sevalve yendawo Ivalve elawula enendawo eqhelekileyo ixhotyiswe ngevalve elawulayo enendawo ekrelekrele Imposiso esisiseko. ingaphantsi kwe-20% yohambo kwaye ingaphantsi kwe-0.5% yohambo Uzinzo lweValve luzinzile kwaye luzinzile kakhulu Ulungelelwaniso lweManuwali kwisiza Uhlengahlengiso kwisiza, kwikhabhinethi okanye kunxibelelwano neDCS ngecalibrator Umthombo woMqondiso 4 ~ 20mA okanye umqondiso womoya. isignali yeanalog okanye isignali yedijithali Ukusebenza/ixabiso eliphezulu kuneliphantsi 1 FIELDVUE ekrelekrele ivalve positioner umgaqo osebenzayo kunye neempawu imijelo. Isiseko semodyuli siquka iimodyuli ezisezantsi: abaguquli be-I/P; indibano yePWB (ibhodi yesiphaluka eprintiweyo); Ukuphindaphinda umoya; Iphepha lemiyalelo. Isiseko semodyuli sinokuphinda sidityaniswe ngokutshintshisa iimodyuli ezisezantsi. Uluhlu lwe-FIELDVUE isilawuli sevalvu yedijithali sifumana imiqondiso yegalelo kunye namandla ombane ngeperi ejijekileyo yeengcingo kwibhokisi ye-terminal ngaxeshanye kwi-submodule yendibano ye-PWB, apho idityaniswe neeparamitha ezininzi ezinje ngolungelelwaniso lwenode, imida kunye namanye amaxabiso kwi-multi-segment fold -Ukwenza umgca. I-submodule yecandelo le-PWB emva koko ithumela imiqondiso kwi-I/P converter submodule. Umguquli we-I/P uguqula isignali yegalelo ibe ngumqondiso webarometric. Isignali yoxinzelelo lomoya ithunyelwa kwi-pneumatic repeater, ikhuliswe kwaye ithunyelwe kwi-activator njengomqondiso wokuphuma. Umqondiso wemveliso unokuviwa yinto enovakalelo yoxinzelelo ebekwe kwi-submodule yecandelo le-PWB. Ulwazi lokuxilonga kwii-actuator zevalvu. IINDAWO EZIMO ZE-STAM ZEVALVVU NE-ACTUATOR ZISETYENZISWA NJENGEZIBONISO ZOKUFUMANA I-PWB SUBMODULI YAYE ZISETYENZISWE NJENGEMPAWU ZEMPENDULO KUMLAWULI WEVALIVI YEDIJALI, ENOKUKHONA IGAUGE EBONISA UMOYA. 1.2 Iimpawu ezikrelekrele ze-valve positioner ekrelekrele 1.2.1 Ulawulo lolwazi lwexesha langempela, ukhuseleko oluphuculweyo kunye neendleko ezincitshisiweyo 1) Ukuphucula ulawulo: unxibelelwano lwedijithali lwendlela ezimbini luzisa ulwazi lwemeko yangoku yevalve kuwe, ungathembela kwivalve. ulwazi lomsebenzi ukuba nesiseko sesigqibo solawulo lolawulo lwenkqubo, ukuqinisekisa ulawulo lwangexesha. 2) Phucula ukhuseleko: Unokukhetha ulwazi kwibhokisi yesiphambuka sendawo, ibhodi yesiphelo okanye kwigumbi lolawulo kwindawo ekhuselekileyo ngokusebenzisa umqhubi wencwadi, iPC okanye inkqubo yokusebenza, ukunciphisa ithuba lakho lokujongana nemeko eyingozi, kwaye akufuneki yiya kwindawo. 3) Ukukhusela okusingqongileyo: i-valve yokuvuza i-valve okanye ukutshintshwa komda kunokudityaniswa kwi-terminal encedisayo yomlawuli wevalve yedijithali ehlakaniphile, ukwenzela ukuba ugweme i-wiring yentsimi eyongezelelweyo. Isilinganisi-manzi siya kuvusa ukuba umda ugqithisiwe. 4) Ugcino lwe-Hardware: Xa i-FIELDVUE yochungechunge lwe-valve yedijithali isetyenziswe kwiinkqubo ezihlangeneyo, i-FIELDVUE yesilawuli sevalve yedijithali ithatha indawo yomlawuli ukugcina kwi-hardware kunye neendleko zokufakela. Uchungechunge lwe-FIELDVUE abalawuli bevalve yedijithali bagcina i-50% kwi-investment ye-wiring, i-terminal kunye neemfuno ze-I / O. Ngaxeshanye FIELDVUE imitha isebenzisa unikezelo lwamandla lwenkqubo yomgca ezimbini, ayifuni cingo lonikezelo lwamandla olwahlukileyo nolubizayo. Batshintsha izixhobo ze-analog ezikhoyo ezifakwe kwiivalve kwaye zigcine iindleko eziphezulu zokubeka amandla kunye nemigca yesignali ngokwahlukileyo. 1.2.2 Isakhiwo esithembekileyo kunye nolwazi lwe-HART 1) Isakhiwo esihlala ixesha elide: Isakhiwo esitywinwe ngokupheleleyo sithintela ukungcangcazela, ubushushu kunye nendalo enobungozi ekuchaphazeni, kunye nebhokisi ye-junction yentsimi yemozulu ihlula uqhagamshelwano locingo lwentsimi ukusuka kuso sonke isixhobo. 2) Ukukhawulezisa amanyathelo okulungiselela ukuqalisa: Ikhono lonxibelelwano lweendlela ezimbini zesilawuli sevalve yedijithali ikuvumela ukuba uchonge isixhobo ngasinye ukude, ujonge ulungelelwaniso lwaso, uphonononge kwaye uthelekise iirekhodi zokugcina ezigcinwe ngaphambili kunye nolunye ulwazi olongezelelweyo, ukufezekisa injongo ukuqala iluphu ngokukhawuleza. 3) Ukukhetha okulula kolwazi: I-FIELDVUE yendawo yevalve yedijithali kunye nomthumeli usebenzisa iprotocol yonxibelelwano ye-HART ukukhetha ngokulula ulwazi lwentsimi. Jonga NGOKUNYANENEYO ISISEKO SENKQUBO YOLAWULO-IVAVVU YOLAWULO NGOKWASO- NGONCEDO LONXIBELELWANO ELUbambe ngesandla KWI-valve OKANYE KWIBHOKISI YOKUJONGANA NEBANDLA, KUNYE NGONCEDO LWEKHOMPYUTHA OKANYE LWE-OPERATOR'S CONSOLE KWI ROOM YOLAWULO lwe-DCS. Ukwamkelwa kweprotocol ye-HART kwakhona kuthetha ukuba iimitha ze-FIELDVUE zingabandakanywa kwinkqubo edibeneyo okanye isetyenziswe njengesixhobo sokulawula esizimeleyo. Oku kuziqhelanisa kwimiba emininzi kwenza uyilo lwenkqubo lusebenze ngakumbi kwaye lube lula kungakhathaliseki ngoku okanye kwixesha elizayo. 1.2.3 Ukuzixilonga kunye nokukwazi ukulawula 1) Unxibelelwano lwe-Fieldbus Bonke abalawuli be-valve ye-DVC5000f yedijithali babandakanya amandla onxibelelwano lwe-fieldbus, kubandakanywa ibhloko yomsebenzi we-A0 kunye nokuxilongwa okulandelayo: A) I-valve engundoqo yokusetyenziswa kweeparamitha zokulandelela; B) Iiparamitha zemeko yempilo yesixhobo; C) Uvavanyo oluqingqwe kwangaphambili lwendlela yokusebenza kwevalvu. I-valve EYINGUNDOQO ISEBENZISA IIPARAMETHA ZOKUKHANGELA UKUJONGA UHAMBO LONKE LOKUHAMBA I-STEM (ukuqokelela uhambo) kunye nenani lokujika kohambo lwe-STEM (umjikelo). Imitha yezempilo iyalumkisa ukuba kukho naziphi na iingxaki ngememori yemitha, iprosesa, okanye idetector. Nje ukuba kwenzeke ingxaki, misela ukuba imitha iya kusabela njani kule ngxaki. Ukuba, ukuba umtshini woxinzelelo awuphumeleli, kufuneka imitha ivaliwe? USENOKUKHETHA ukuba Lluphi na ukusilela kwecandelo okuya kubangela ukuba imitha ivale phantsi (nokuba ingxaki inzulu ngokwaneleyo ukwenza imitha ivale phantsi). Le miyalelo yepharamitha ixelwe ngendlela yee-alam. Ii-alamu zokubeka iliso zinokubonelela ngokukhawuleza isixhobo esingalunganga, ivalve, okanye inkqubo. I-2) Ukulawulwa okusemgangathweni kunye nokuxilongwa Bonke abalawuli be-valve ye-DVC5000f yedijithali baquka ulawulo olusemgangathweni kunye nokuxilongwa. Ulawulo olusemgangathweni lubandakanya i-A0 ene-P> ibhendi yempazamo eguqukayo, isiginali yedrive kunye nesiginali yemveliso luvavanyo oluguqukayo lokuskena. Ezi UVAVANYO ZENZIWA UKUTSHINTSHA INKONZO YOKUTSHINTSHA INKONZO YE-TRANSMITTER BLOCK (SERVO MECHANISM) NGEsantya ELAWULWEYO KUNYE NEYINGQESHO YOKUSEBENZA IVAVVU UKUQINISEKISA UKUSEBENZA KWE-DYNAMIC YEVAVA. Umzekelo, uvavanyo lwebhendi yempazamo eguquguqukayo yi-hysteresis enendawo efileyo kunye "nokujikeleza". I-Lag kunye nendawo efileyo ziimpawu ezimileyo. Nangona kunjalo, ngenxa yokuba ivalve ishukuma, iimpazamo eziguqukayo kunye neempazamo "zokujikeleza" ziyaziswa. Uvavanyo lwe-DYNAMIC SCAN LUNIKA ISIBONISO ESILUNGILEYO SOKUBA INDLELA YOKUSEBENZA i-valve phantsi kweemeko zenkqubo, eya kuba namandla kunokuba i-static. Uvavanyo oluqhelekileyo kunye noluphezulu lokuxilonga lunokwenziwa ngokusebenzisa isoftware yeValveLink kwikhompyuter yakho. 3) Uxilongo olukwinqanaba eliphezulu Izixhobo ezinoxilongo oluphezulu zenza uvavanyo lweskeni oluguquguqukayo olubandakanyiweyo kuxilongo oluqhelekileyo kunye novavanyo lwesine oluguquguqukayo lwescan, uvavanyo lweempawu zevalvu, kunye neemvavanyo zokuxilonga ezine. UVAVANYO lweempawu zeValve ikuvumela ukuba UQINISE i-valve/ACTUATOR friction, ibhentshi yovavanyo loxinzelelo lweempawu zoxinzelelo, ukuqina kwentwasahlobo, kunye namandla okuvala isihlalo. 4) Inkqubo yebhasi yeFischer Control Equipment INKONZO ZINOKUPHONONONGA iivalvu, iinkqubo, kunye NEZITHUTHI EZISEBENZA IZIXHOBO EZINENKQUBO NGEZAKHONO ZOKUFUMANA INGXELO NGESISEKO I-FieldBUS ULAWULO LOOP IHLALA IZENZAKALELAYO NENKQUBO IQHUBEKA NEMVELISO. Ukusebenzisa uxilongo lwenkqubo, iinkonzo zokusebenza ziya kuba nakho ukuchonga nokuchonga ukuba ngawaphi amacandelo enkqubo anokuthi abangele iingxaki zomgangatho. Nangona inkqubo yokuxilonga kufuneka iphakame kwaye iqhube, indawo yabo yokugqibela inokumiselwa kuphela yinkqubo okanye ukungenelela komsebenzisi. Ukuxilongwa kwenkqubo kunokwenziwa kwiivalvu ezininzi ngaxeshanye. 2 Ukusetyenziswa kunye nokugcinwa kwezicelo ze-2.1 izicelo ze-FIELDVUE Smart Valve posters zafakwa ngo-Aprili 1998 ukuze zisetyenziswe kwiiyunithi ezili-16 zokuqhekeka kunye ne-ethylene glycol. Isetyenziswa ikakhulu ukubuyisela ezinye iindawo ezibalulekileyo zolawulo ngamaxesha esekethe. Ngokomzekelo, i-valve ye-feed flow of the crashing furnace kunye ne-valve flow feed ye-ethylene glycol epoxy reactor control. Sisebenzisa umqhubi wencwadi ngolungelelwaniso kunye nokuqinisekisa, umgca wayo ungafikelela kwi-99%, zero kunye noluhlu kunye nokubuyisela kunokulawulwa ngaphakathi koluhlu lweemfuno ezichanekileyo, ulawulo oluzinzile kakhulu kunye nokukwazi ukuchasana nokuphazamiseka kunamandla ngakumbi, ukuhlangabezana ngokupheleleyo iimfuno zolawulo lwenkqubo. 2.2 Ulondolozo I-locator ye- FIELDVUE ifuna ulondolozo olungephi kwaye ngokuyimfuneko ayilungiswanga. Ukuziqhelanisa nentsimi yayo yomelele ngakumbi. Kodwa ukuze kuqinisekiswe ukusebenza kwexesha elide kunye nokuzinza, abasebenzi besixhobo kufuneka benze le miba ilandelayo yomsebenzi. I-1) Ukuze kuqinisekiswe indawo efanelekileyo yokusebenza kunye nokukhusela umonakalo wengozi, indawo yokusebenza ejikeleze indawo ehlala kuyo kufuneka ihlolwe rhoqo. Ngexesha elifanayo ukuqinisekisa ukuzinza kunye nokucoceka komthombo womoya osebenzayo, ukunciphisa izinto zangaphandle ezibangelwa ukuguquguquka kwesixhobo kunye nokungaphumeleli. 2) Abasebenzi besixhobo kufuneka bajonge ukuvuza kunye neemeko zokusebenza kweevalvu kunye neendawo zokubeka yonke iveki ukuphelisa iingozi ezifihliweyo ngexesha. Rhoqo ngenyanga, umqhubi wencwadana usetyenziselwa ukujonga ijika leempawu zesikhundla, khangela indawo ye-zero, uluhlu, umgca kunye nempazamo yokubuyisela kunye nezinye iiparamitha, kwaye ulungise kwaye ulungelelanise ukuqinisekisa umgangatho wokusebenza kwayo. 3) Khangela kwaye ugcine i-valve yokulawula rhoqo ukuqinisekisa umgangatho wokusebenza kwevalve. Ngelo xesha, iiparameters ze-DCS control loop ziphuculwe ukuqinisekisa ulungelelwaniso kunye nokuzinza komsebenzi ofanayo kunye ne-locator. 4) Ngenxa ye-DCS kunye nezinye izizathu, imisebenzi yayo ye-fieldbus kunye ne-software ayizange iphuhliswe ngokupheleleyo kwaye isetyenziswe, kwaye ukugcinwa okuhlakaniphile kunye nemisebenzi yokuxilongwa ayikwazi ukusetyenziswa ngokupheleleyo, kodwa isanciphisa ukugcinwa kwemihla ngemihla. Ngokwesiphumo sokusetyenziswa kwesityalo sekhemikhali kwiminyaka emibini edlulileyo, umlawuli wevalve okrelekrele unomsebenzi ozinzile kunye nohlengahlengiso olufanelekileyo; Unokuqonda unxibelelwano oluthe ngqo kunye ne-DCS, kwaye unomsebenzi wokuzixilonga, ukugcinwa okulula; Inokutshintshwa kwi-fieldbus, ** isalathiso sophuhliso lweteknoloji yesixhobo sanamhlanje. Uphuhliso oluthe kratya kunye nokusetyenziswa komsebenzi walo wesoftware lukhokelo ekujoliswe kulo kwiinzame zethu zexesha elizayo. Uhlalutyo lwesimo sevalvu ekrelekrele kunye nohlalutyo lwemposiso eqhelekileyo