Ivalve yokulawula indlela yokukhetha umvavanyi okrelekrele wokungena komoya wamalahle usebenzisa ivalve elawulayo, ukuhlangabezana noxinzelelo kunye neemfuno zokuhamba

Ivalve yokulawula indlela yokukhetha umvavanyi okrelekrele wokungena komoya wamalahle usebenzisa ivalve elawulayo, ukuhlangabezana noxinzelelo kunye neemfuno zokuhamba

I-Regulator yi-terminal actuators kwiinkqubo zolawulo lwenkqubo yoshishino, inkqubo yemveliso eqhubekayo yokuvelisa inkqubo yolawulo oluzenzekelayo ngokubanzi kufuneka isebenzise umlawuli ukulawula inkqubo ekuveliseni iiparameters zenkqubo ezahlukeneyo, ukufezekisa iiparameters zolwelo ezifana noxinzelelo, ubushushu, izinga lokuhamba. kunye nenqanaba lolwelo lohlengahlengiso, ngokuqhelekileyo kwaziwa ngokuba "izandla neenyawo" kwimveliso ye-automation process process. Umgangatho wokusetyenziswa kwayo ubonakaliswa ngokuthe ngqo kumgangatho wolawulo lwenkqubo. Njengento yokwenziwa kwesiphelo kulawulo lwenkqubo, abantu banokuqonda okunzulu ngokubaluleka kwayo kunangaphambili. Ukusetyenziswa kwevalvu yokulawula kulungile okanye kubi, ukongeza kumgangatho wemveliso kwaye abasebenzisi bafakele ngokuchanekileyo, ukusetyenziswa kunye nokugcinwa, ukubala okuchanekileyo kunye nokukhetha kubaluleke kakhulu. Ngenxa yempazamo yokubala kunye nokukhetha, inkqubo iqhuba ingazinzanga, kwaye eminye ayinakusetyenziswa kwimizekelo emininzi. Ngoko ke, abasebenzisi kunye nabaqulunqi benkqubo ukuba baqonde ngokupheleleyo ukubaluleka kokulawula i-valve kwintsimi, kufuneka kubangele ingqalelo eyaneleyo ekukhetheni i-valve yokulawula.
Umgaqo oqhelekileyo wokulawula ukhetho lwe-valve kukuba: phantsi kwesiseko sokuhlangana nomsebenzi wokusetyenziswa, i-valve yokulawula ekhethiweyo kufuneka ibe yisakhiwo esilula, ukusebenza okuthembekileyo, ixabiso eliphantsi, ubomi obude, ukugcinwa ngokufanelekileyo kunye nokunye. Oku kulandelayo kugxininise ekukhetheni nasekulawuleni uhlobo lwevalvu
Ukukhethwa kweziqhotyoshelo.
Ukukhetha uhlobo lwevalvu e-1 elawulayo
Indlela yokuhlelwa kwe-Regulator zininzi, yangoku yasekhaya kunye namazwe ngamazwe kwindlela yokuhlela ihlala yamkelwa yisakhiwo, umgaqo kunye nolwahlulo lomsebenzi, inani elipheleleyo leentlobo ezi-9 ezinkulu, ezizezi nge-valve yokulawula isihlalo esinye, ukudlula kwisilawuli sezihlalo ezibini, ivalve enemikhono, ivalve yeAngle, ivalve yendlela ezintathu, ivalve yediaphragm, ivalve yebhabhathane, ivalve yebhola kunye nevalve ejikelezayo ejikelezayo, imveliso elithoba isisiseko, imveliso eqhelekileyo, Ngokuqhelekileyo ikwabizwa ngokuba yimveliso eqhelekileyo, enye isekwe kwindibaniselwano yokuphuculwa kwesicelo esisebenzayo, ebizwa ngokuba iimveliso ezikhethekileyo.
1.1 Iimpawu kunye nokukhetha okuchanekileyo kohlobo oluqhelekileyo ivelufa elawulayo 1.1.1 Ngokuthe ngqo kwisitulo esinye solawulo
Ngokuthe ngqo ngesihlalo esisodwa sokulawula ivalve kuphela i-spool kunye nesihlalo, kulula ukufezekisa ukutywinwa okungqongqo, isinyithi kunye nentsimbi yentsimbi eqinile, okanye isinyithi kunye ne-PTFE okanye ezinye izinto ezidibeneyo zokutywinwa okuthambileyo, ukuvuza okusemgangathweni kwe-0.01% C (i-C ilinganiswe ukuhamba kwe-coefficient), vumela umahluko omncinci woxinzelelo, umthamo omncinci wokuhamba, Umzekelo, i-DN100 i-valve yokulawula isihlalo esisodwa ivumele ukuhlukana koxinzelelo * 120kPa, umthamo wokuhamba * 100. Indlela yokuhamba iyinkimbinkimbi, isakhiwo esilula, esifanelekileyo kwiimfuno ezingqongqo zokuvuza, ukuhluka koxinzelelo olusebenzayo luncinci, lucocekile. ngamaxesha aphakathi, kodwa ukucaciswa okuncinci kwevalve elawulayo (DN1/2, 3/4, 20) ingasetyenziselwa umcimbi wokumahluko omkhulu woxinzelelo, isetyenziswe njengenye yeyona valve ilungileyo yokulawula, xa iyilwe ngakumbi, inokuba isetyenziswe njengevalve yokusika. Ubume be-spool bumisela iimpawu zokuhamba. Ilahlekelwa yimpawu zayo zangaphambili emva kokuhlanjwa. Ukutshintsha i-spool kunokutshintsha iimpawu zokuhamba. Nangona kunjalo, i-thrust ye-fluid medium kwi-spool inkulu, oko kukuthi, amandla angalinganiyo makhulu, kwaye i-actuator ene-thrust enkulu iyafuneka. Ngoko ke, ekusebenziseni ukuhluka koxinzelelo oluphezulu kunye nobukhulu obukhulu, akufanelekanga ukusebenzisa olu hlobo lwevalve yokulawula. Khetha le valve kufuneka ihlawule ingqalelo ekhethekileyo kuhlulo loxinzelelo lokuthintela ukunqanda ukuvuleka.
1.1.2 Ngokuthe ngqo kwivalve yokulawula enezihlalo ezibini
Ivalve elawulayo enezihlalo ezibini ethe ngqo inezitulo ezimbini zespool kunye nezihlalo ezimbini zevalvu. Ngenxa yokuba ukutyhala okuya phezulu kwe-spool ephezulu kunye nokuhla kwe-spool ezantsi kuhambelana ngokusisiseko, amandla okungalingani kwe-spool yonke amancinci kwaye umahluko ovunyelweyo woxinzelelo mkhulu. Ngokomzekelo, i-valve yokulawula izihlalo ezimbini ze-DN100 ivumela ukuhluka koxinzelelo lwe-280kPa, kwaye umthamo wokuhamba ukhulu. Ivalve elawulayo enezihlalo ezibini inokuqukuqela kulwelo oluthe kratya, isivalo esifanayo sezihlalo ezibini sokulawula ukuqukuqela kwevalvu kunesihlalo esinye esilawula umthamo wevalvu emalunga nama-20% ~ 50%. Ngokomzekelo, umthamo wokuhamba kwe-DN100 umlawuli wezihlalo ezimbini ngu-160. Ngoko ke, ukuze ufumane umthamo ofanayo wokuhamba, umlawuli wezihlalo ezimbini unokukhetha i-activator encinci ye-thrust. Ivalve yokulawula izihlalo ezibini usebenzisa isikhokelo esingaphezulu nasezantsi, ke ngoko, ivalve yomzimba kunye nevalve yomzimba ebuyela umva ilungelelanisa ivalve, oko kukuthi, i-spool kuphela kunye nesihlalo esifakwe ngasemva sinokutshintsha ivalve yomzimba ukuya kwivalve yomzimba ongasemva, okanye umva. I-valve yomzimba kwi-valve yomzimba ephilileyo, ngaphandle kwesidingo sokutshintsha uhlobo lwesenzo esilungileyo okanye esibi se-actuator. I-valve yokulawula izihlalo ezibini, i-spool ayikwazi ukuvalwa ngexesha elifanayo, ukuvuza kukhulu, ukuvuza okusemgangathweni ngu-0.1% C (C yi-coefficient flow flow rated); Indlela yokuhamba iyinkimbinkimbi, kwaye ayifanelekanga kwizicelo zoxinzelelo oluphezulu, kuba kulolu hlobo lwesicelo, i-valve i-scour yi-high-high pressure fluid ibaluleke kakhulu, kwaye kulula ukwenza i-flash kunye ne-cavitation, i-aggravating scour of the valve body, kwakhona ayifanelekanga ukulawula imidiya ye-fibrous kunye ne-viscosity fluid ephezulu.
1.1.3 Ivalve elawula umkhono
Ivalve elawula umkhono ikwabizwa ngokuba yivalve yekheji, iindawo zayo zangaphakathi zevalve zisebenzisa i-spool kunye ne-valve cage (umkhono), umkhono unokuthe tye kwivalve yokulawula isitulo esinye, inokuba sisitulo esilawulayo sezihlalo ezibini okanye ivelufa elawula iAngile, njl.njl. Itywina elinye, itywina eliphindiweyo izakheko ezibini, esokuqala silingana nevalve yokulawula isihlalo esinye, esilungele isitulo esinye esilawula amaxesha evalvu; Le yokugqibela ilingana nevalve elawula izihlalo ezibini, ilungele izihlalo ezibini zokulawula ivalve. Ukongeza, ikwanazo uzinzo olufanelekileyo, ukulayishwa okufanelekileyo kunye nokukhulula, ukugcinwa okufanelekileyo, kuneempawu zokunciphisa ingxolo kunye nokunciphisa impembelelo ye-cavitation, kodwa ixabiso levalve yokulawula isihlalo esisodwa kunye nesiphindwe kabini zibiza i-50% ~ 200%, nayo ifuna eyodwa. i-gasket ejikelezayo, isicelo sayo siphezulu kakhulu, singaphantsi kwevalve yokulawula isihlalo esisodwa kunye nesiphindwe kabini, Nangona kunjalo, le valve akufanele isetyenziswe kumajelo angcolileyo kwaye kulula ukuyikhupha, i-stutter kunye ne-scale media.
1.1.4 Ivalve elawula i-engile
Ivalve elawula i-Angle sisitulo esilawulayo esinesihlalo esisodwa esinesakhiwo somzimba esikhethekileyo, esilungele umbhobho othile kunye nezihlandlo zolwelo, yinto ethe ngqo emzimbeni ukutshintsha i-Angle (elingana nengqiniba) umzimba, i-throttling, i-force form ilingana ngokupheleleyo. kwisitulo esinye sokulawula ivalve. Gcina ukuvuza kwevalvu yokulawula isitulo esinye, umahluko omncinci ovumelekileyo woxinzelelo. Ukongezelela, ngenxa yendlela yayo yokuhamba elula ine "ukuzicoca" ukusebenza, inokusetyenziswa kumajelo angcolileyo, kodwa ingaphuculwa ngakumbi ukukhusela i-valve ye-Angle evaliweyo, ifanelekile kwiimeko zokusebenza eziqukethe amasuntswana aphakathi, ngakumbi kufakelo. indawo inqabile, ngakumbi ilungele amaxesha.
1.1.5 Ivalve yokulawula iindlela ezintathu
Ivalve yokulawula iindlela ezintathu isebenzisa i-spool ngokwayo ukukhokela, kwaye i-actuator kufuneka itshintshwe xa ukuvuleka komoya kunye nokuvalwa kwegesi kutshintshwa. Kufuneka kuqatshelwe ukuba intsingiselo yokuvulwa komoya wayo kunye nokuvalwa kwegesi ayifani nezinye iivalve ezilawulayo. Ukuvuleka kwayo komoya kunye nokuvalwa kwegesi kufuneka kucace ukuba yeyiphi na indlela, oko kukuthi indawo ethe tyaba okanye indawo ethe nkqo. Ineendlela ezithathu, inokutshintsha ezimbini ezithe ngqo kwisitulo esinye sokulawula ivalve ye-shunt kwaye idibanise amaqela amabini okuhamba kunye nokwahluka kweqondo lobushushu ≤150℃ izihlandlo, xa i-DN≤80mm, ivalve yokudibana ingasetyenziselwa iimeko ze-shunt.
1.1.6 Ivalve elawula i-diaphragm
Ivalve elawula i-diaphragm nge-diaphragm ekwaziyo ukudleka kwaye inenziwe ngomzimba okwaziyo ukumelana nomhlwa, indlela elula yokuqukuqela, ilungele okuphakathi okungacocekanga kunye nobuthathaka obuphakathi okunomhlwa izihlandlo ezibini ezisikiweyo. Ngomnye wevalve yokulawula kwangaphambili, ngenxa yeempawu zokuhamba malunga nokuvulwa ngokukhawuleza, umgangatho wolawulo uhlwempuzekile, kwaye uchatshazelwa yi-diaphragm kunye ne-lining material, ayinakusetyenziselwa ukushisa okuphezulu kunye neemeko zoxinzelelo oluphezulu, ukusebenza ngokubanzi. uxinzelelo lungaphantsi kwe-1.6mpa, ubushushu bokusebenza bungaphantsi kwe-150 ℃, kunye ne-diaphragm kulula ukuyonakalisa, ubomi obufutshane beentsilelo, ngoku umcimbi awukho kakhulu.
1.1.7 ivelufa yebhabhathane
Ivalve yebhabhathane ilingana necandelo lombhobho ukwenza ivalve umzimba, ** ukuseta ipleyiti yevalve throttle, isetyenziselwa ukulawula umlawuli ojikelezayo oqhelekileyo. Ifanele UKUXINZELELA OKUPHANTSI, UXINEZELEKO PHAKATHI OKANYE, KWIIMEKO EZINGAQHELEKANGA, UXINEZELEKO LWE-STATIC ELIPHEZULU, I-FLOW enkulu, kodwa Uxinzelelo olwahlukileyo lulinganiselwe. Ubukhulu bayo buncinci, ubunzima obukhanyayo, ukukhanya 4 ~ 10 amaxesha kunohlobo olufanayo lwe-valve ye-spherical elawulayo, i-caliber kunye nexabiso lincinci, lifanelekile ngokukodwa kwizihlandlo ezinkulu ze-caliber, kwaye ubukhulu be-caliber yevalve elawulayo, ngakumbi olu phawu. Ngokubanzi, xa DN>300mm, idla ngokugqityezelwa yivalve butterfly.