Iivalvu zeBhola eziSebenziswa yiPneumaticzizinto ezibalulekileyo kwi-automation yemizi-mveliso yokulawula ukuhamba kwamanzi kunye nokwahlulwa kwezinto ngexesha likaxakeka.
Esi sikhokelo sobunjineli sibonelela ngendlela ecwangcisiweyo yokwenzaivalvu yebhola yomoyaukhetho—ukugubungela
i-rack & pinion vs. i-scotch yoke actuatoruthelekiso,ukusebenza kabini xa kuthelekiswa nokubuyela entwasahloboingqiqo ekhuselekileyo,
I-ESDV (iValvu yoKuvala iXakeka)ukuhlanganiswa,I-API 6Dimigangatho yoyilo,
ukubala ubungakanani be-torque, kunye nokukhethwa kwezinto ezisetyenziswa kwiimeko ezinzima zenkonzo.
Nokuba ungunjineli weenkqubo, ingcali yokuthengwa kweeprojekthi, okanye ingcali yokulungisa, esi salathisi senzelwe ukusetyenziswa imihla ngemihla.
1. Umgaqo Wokusebenza kunye Neendlela Zokuqhuba I-Actuator
A ivalvu yebhola eqhutywa ngomoyayenziwe ngeivalvu yebhola ejika ikotaumzimba
idibene neisixhobo somoyaI-actuator iguqula umoya ocinezelweyo wezityalo (ngesiqhelo
4.0–8.0 bar / 60–115 PSI) kwi-torque yoomatshini, iqhuba isiqu sevalvu kunye nebhola kujikelezo lwe-90°
ukuvula okanye ukuvala ngokukhawuleza indlela yokuhamba kwamanzi.
1.1 Iintlobo ze-Pneumatic Actuator
- Ii-Actuators zeRack kunye nePinion: Zineepiston ezimbini ezichaseneyo kunye neerakhi zegiya ezidibanisa iphini eliphakathi.
Iingenelo ziquka unyawo oluncinci, umbane ophuma ngomgca, ukusebenza kakuhle koomatshini, kunye nokuphendula ngokukhawuleza.
Ifanelekile kakhulu kwiivalvu ezincinci ukuya kweziphakathi (½” ukuya kwi-12″). - Ii-Actuators zeScotch YokeSebenzisa indlela yejoko evelisa i-torque curve engangqalanga—
inika i-torque ephezulu kwiindawo zokuvula i-break-open kunye nezokuvala izihlalo.
Oku kubenza babe lolona khetho lufanelekileyoiivalvu zebhola ezifakwe kwi-trunnion enkulu
(DN150 ukuya kwi-DN600+ / Iklasi ye-150 ukuya kwiKlasi yama-2500).
1.2 Ukudlala kabini xa kuthelekiswa nokubuyela entwasahlobo (Ukudlala kanye)
Ukukhetha imo yesenzo se-actuator echanekileyo kuchaphazela ngqo ukhuseleko lwenkqubo ngexesha lokusilela kokunikezelwa komoya:
| Isenzo se-Actuator | Ukusebenza koMbane woMoya | Imeko Yokhuseleko Lokungaphumeleli (Ukulahleka Komoya) |
|---|---|---|
| Ukusebenza kabini (DA) | Umoya oya ePort A uyavula; umoya oya ePort B uyavala | Indawo yokusilela: Ivalvu ibambe indawo yokugqibela |
| Ukubuya kweNtwasahlobo (SR) | Uxinzelelo lomoya lucinezela izipringi ngexesha elinye; amandla entwasahlobo ayabuya | Ukhuseleko Lokusilela Kwemishini: Ukuvalwa Ngokuzenzekelayo (FC) okanye Ukuvulwa Ngokuzenzekelayo (FO) |
Ii-actuators zokubuyisela intwasahlobo ziyimfuneko ukuqinisekisa ukuba ivalvu ibekwa ngokuzenzekelayo kwindawo ekhuselekileyo xa kulahleke umoya wesixhobo okanye amandla esityalo.
2. Ukwakhiwa koMzimba weValve kunye neZitulo eziSebenza ngokuPhezulu
Ukuthembeka kwexesha elide kwevalvu yebhola ye-pneumatic akuxhomekanga kuphela kwi-actuator kodwa nakwi
uyilo lomzimba wevalvu kunye nokukhetha izinto zokuhlala. Cinga ngobushushu bokusebenza, uxinzelelo,
ukubola, kunye nomxholo weenxalenye xa kukhethwa izinto.
2.1 Uqwalaselo loMzimba weValve
- Uyilo lweBhola edadayo: Ifanelekile kwii-DN15–DN100, iiKlasi 150–300.
Uxinzelelo oluphezulu lunyanzela ibhola ukuba ivalwe yisihlalo esisezantsi ukuze ivalwe. Kulula kwaye kuyabiza kakhulu. - Uyilo lweBhola eQokelelwe kwiTrunnion: Iyimfuneko kwiinkonzo ze-DN50–DN600, zeKlasi 150–2500 ezinoxinzelelo oluphezulu/ezinkulu.
Ibhola iqiniswe yi-stem ephezulu kunye ne-trunnion bearing esezantsi, nto leyo enciphisa i-torque yokusebenza ukuya kuthi ga kwi-50%
kunye nokukhusela iindawo zokutywina—ezilungele ukuqhuba umjikelo ozenzekelayo rhoqo. - Ukupakisha Okulayishwe Bukhoma: Ukupakisha i-graphite eguquguqukayo enikwe amandla entwasahlobo eBelleville kuyagcina
umthwalo we-radial ohlala uhleli, ohlawula ukujikeleza kobushushu kunye nokuhlanganaI-API 641kwaye
I-ISO 15848-1imigangatho yokukhupha ukukhutshwa komoya ongcolileyo.
2.2 Uthelekiso lwezinto zokuhlala
| Uhlobo lweSihlalo | Izinto eziqhelekileyo | Uluhlu lobushushu kunye neempawu |
|---|---|---|
| Ihleli Kamnandi | I-PTFE / RPTFE / PEEK / PPL | −29°C ukuya kwi-260°C (JONGA ukuya kuthi ga kwi-300°C) I-ANSI/FCI 70-2 Class VI ivaliwe ngokuqinileyo ngamaqamza |
| Isihlalo EsineMetal (Esigqunywe yiHVOF) | I-Tungsten Carbide / i-Chrome Carbide (HRC 68–72) | −196°C ukuya kuma-650°C Umphunga oshushu kakhulu, amaqhekeza amdaka, iinxalenye ze-catalyst, i-abrasive media |
Kwiimeko ezinzima zenkonzo ezibandakanya amaqondo obushushu aphezulu, uxinzelelo oluphezulu lomahluko, okanye izixhobo ezigcwele izinto eziqinileyo,
iivalvu zebhola ze-trunnion ezihlala ngentsimbinge-HVOF, kucetyiswa kakhulu ukuba kusetyenziswe i-thermal spray coats.
3. Izixhobo zeNkqubo yoLawulo kunye noCimo oluNgxamisekileyo lwe-ESDV
Kwimizi-mveliso yepetrochemical, igesi, kunye nokuveliswa kombane, iivalvu zebhola zepneumatic zihlala zisetyenziswa.
ichazwe njengeI-ESDV (iiValvu zokuvala ezingxamisekileyo)okanye i-EIV (iiValve zokuZihlukanisa eziNgxamisekileyo).
Ezi zizinto zokugqibela zolawulo ngaphakathiIinkqubo zeZixhobo zoKhuseleko (i-SIS)apho
isantya sempendulo kunye nokuthembeka kuchaphazela ngokuthe ngqo ukhuseleko lwezityalo.
Iphakheji yesixhobo se-ESDV eqhelekileyo yeeValve zeBhola zePneumatic
- Iivalvu zeSolenoid: Ujongano lwe-NAMUR, 3/2 okanye 5/2 indlela, i-SIL 2/3 iqinisekisiwe ukuba inxibelelanisa umbane-umoya.
- Izikhombisi zeValve ezikrelekrele: 4–20mA + HART / Profibus PA, evumela ulawulo olulawulayo kunye nokuxilongwa kwi-intanethi.
- Iibhokisi zokutshintsha umda: IP67 / Ayinakuqhuma ngaphandle kwe-d, inika impendulo yendawo evulekileyo/evaliweyo kwi-DCS/PLC.
- Abalawuli besihluzo somoya (AFR): Ukucoca nge-5μm, ukuzinzisa uxinzelelo lombane kunye nokwandisa ubomi besitywina se-actuator.
- Izixhobo zoVavanyo lweStroke oluNgaphelelanga (PST): Uvavanyo lwe-intanethi lwe-10–15% ye-valve stroke ukuqinisekisa ukufumaneka kwe-ESDV ngaphandle kokuphazamiseka kwenkqubo—ukunciphisa umngcipheko wokuqinisekiswa kwe-SIL.
Kwizicelo ze-ESDV ezikhawulezayo ezifuna ukuvalwa ngokupheleleyoImizuzwana eyi-0.5–1.0,
ezinye izinto ezifanaiivalvu zokukhupha umbane ngokukhawulezakwayeiivalvu zovavanyo ezihamba ngokukhawuleza
kufuneka icaciswe ukuze kuncitshiswe ixesha lokukhupha umoya kwi-actuator.
4. Ubungakanani beTorque ye-Actuator Ukubalwa kunye neMigangatho yoYilo
Inyathelo elibaluleke kakhulu ekukhetheni i-pneumatic actuator yileukuhambelana kwe-torque.
Ukunciphisa ubungakanani kubangela ukuba iivalvu zingavaleki okanye zingavalwa ngokupheleleyo; ubukhulu obugqithisileyo buyandisa iindleko, umgama,
kwaye inokubangela uxinzelelo olugqithisileyo emzimbeni wevalvu.
4.1 Ifomula yokulinganisa i-Actuator
Khethaeyona iphezuluixabiso phakathi kwezi zinto zintathu ze-torque njengesiseko sakho:
- I-Torque yokuqhuma: I-torque ephezulu iyadingeka ukuze kuqaliswe ukujikeleza ukusuka kwindawo engashukumiyo.
- I-Torque yokubaleka: I-torque iyadingeka ukuze kugcinwe ukujikeleza ngexesha lokubetha.
- I-Torque yokuhlala: Kufuneka i-torque ukuze ibhola ivalwe kwisihlalo xa ivaliwe.
· Inkonzo yegesi eyomileyo: I-Torque ×1.3
· Inkonzo yodaka/yokuxinana okuphezulu: I-Torque ×1.5
· Ubushushu obuphezulu (>400°C): Nxibelelana nomenzi ukuze ufumane impembelelo yokwandiswa kobushushu kwi-torque.
4.2 Uyilo oluPhambili kunye neMigangatho yoVavanyo
Uvavanyo loxinzelelo kunye nokuvuza:API 598, ISO 5208, ANSI/FCI 70-2
Isiqinisekiso Esikhuselekileyo Emlilweni:I-API 607, i-ISO 10497
Ukukhutshwa komoya ongcolileyo:I-API 641, i-ISO 15848-1
Ukufakelwa kwe-Actuator:I-ISO 5211 / NAMUR
Ukhuseleko olusebenzayo:I-IEC 61508 SIL 2 / SIL 3 Iyakwazi
5. Imibuzo Ebuzwa Rhoqo (Imibuzo Ebuzwa Rhoqo)
6. Uluhlu lokuHlola iSiphetho kunye noKhetho
Ukukhetha ekuneneivalvu yebhola eqhutywa ngomoyaifuna uvavanyo olucwangcisiweyo lwe
Iiparameter zenkqubo, iimfuno zokhuseleko, kunye nokuqwalaselwa kweendleko zomjikelo wobomi. Sebenzisa olu luhlu lokuhlola lulandelayo
ukukhokela iinkcukacha zakho:
- Chaza iimeko zenkqubo: Uxinzelelo, ubushushu, uhlobo lwemidiya, izinga lokuhamba, kunye nomxholo wamasuntswana.
- Khetha uyilo lweevalvu: Ibhola edadayo (imbobo encinci) okanye efakwe kwi-trunnion (imbobo enkulu / uxinzelelo oluphezulu).
- Khetha izinto zokuhlala: Ihlala ithambile (iKlasi VI ivaliwe) okanye ihleli ngentsimbi (inkonzo enzima / ubushushu obuphezulu).
- Khetha uhlobo lwe-actuator: I-Rack & pinion (i-compact, i-linear torque) okanye i-scot yoke (i-high breakout torque).
- Chonga imo yesenzo: Ukusebenza kabini (ukungaphumeleli endaweni) okanye ukubuya kwentwasahlobo (ukungaphumeleli i-FC/FO).
- Bala ubungakanani be-torque: Ukuqhuma × into yokhuseleko (1.30–1.50) eneziphindaphindi zemidiya.
- Chaza izixhobo: Iivalvu zeSolenoid, ii-positioners, ii-limit switches, i-AFR, kunye ne-PST ukuba kuyimfuneko.
- Qinisekisa ukuthobela imithetho: I-API 6D, i-API 607, i-API 641, i-ISO 15848, kunye novavanyo lwe-SIL njengoko kufanelekile.
kunyeuvavanyo lwestroke engaphelelanga (PST)ukukwazi ukugcina ukuthotyelwa kweNqanaba loBulungisa boKhuseleko (i-SIL)
kwaye uqinisekise ukuba ivalvu iyafumaneka ngexesha leemeko ezingxamisekileyo.
Ngaba ufuna uncedo lweengcali ngokukhetha ivalvu yakho yebhola ye-pneumatic?
Iqela lethu lobunjineli ligxile kwizisombululo zevalvu yomoya ye-API 6D ye-ESDV, ukucima, kunye nezicelo zolawulo.
Fumana inkxaso yobungakanani, iingcebiso zezinto eziphathekayo, kunye namaxwebhu emveliso aqinisekisiweyo.
Ixesha leposi: Agasti-27-2026