Iimpawu zeValve yokuvala zizixhobo ezibalulekileyo kwimizobo yobunjineli, zibonelela ngolwimi oluqhelekileyo kwiingcali ukutolika uyilo lwenkqubo. Phakathi kwezi mpawu,uphawu lwevalvu yokuvala (SDV)ibaluleke kakhulu kukhuseleko lwemizi-mveliso kunye nolawulo lwenkqubo. Kweli nqaku, sihlola ukuba zeziphi iimpawu zevalvu, iinkcukacha zeempawu zevalvu ezivaliweyo, usetyenziso lwazo, kunye nendlela yokuzisebenzisa ngokuchanekileyo—ngexesha sidibanisa imizekelo yezinye iimpawu zevalvu kumxholo.
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Yintoni Uphawu lweValve
Iimpawu zevalvu ziimpawu zemizobo ezisemgangathweni ezisetyenziswa kwiImizobo yeMibhobho kunye neZixhobo zoKusebenzisa izixhobo (ii-P&ID)ukubonisa uhlobo, umsebenzi, kunye nokusebenza kweevalvu kwinkqubo. Ezi mpawu zilungelelanisa unxibelelwano phakathi kwamaqela obunjineli, ziqinisekisa ukuhambelana koyilo, ulondolozo, kunye neenkqubo zokhuseleko. Izinto eziqhelekileyo ziquka:
- Iimilo ezisisiseko(izangqa, oonxantathu, iidayimani) ukubonisa iintlobo zeevalvu.
- Imigca kunye neentoloukubonisa indlela yokuhamba okanye iindlela zokuqhuba.
- Iimpawu ezongezelelweyo(umz., “FC” ithetha i-fail-closed, “FO” ithetha i-fail-open).
Imizekelo yezinye iimpawu zevalvu:
- Ivalvu yebholaIsangqa esinomgca othe nkqo.
- Ivalvu yesango: Uphawu olumile okwesikwere ngaphakathi kwengxande.
- Ivalvu yokujonga: Unxantathu okhomba kwicala lokuhamba kwamanzi.
- Ivalvu yebhabhathane: Imele ivalvu ejikelezayo yekota enediski ejikelezayo.
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Yintoni iValve yokuvala (i-SDV)
A ivalvu yokuvala (SDV)yivalvu ebalulekileyo yokhuseleko eyenzelweukuhamba kwenkqubo yokwahlulahlulangexesha likaxakeka, njengokuvuza, uxinzelelo olugqithisileyo, okanye ukungasebenzi kakuhle kwezixhobo. Ezi valve zihlala zizenzekela kwaye ziqhagamshelwe kwiinkqubo zokhuseleko (SIS) ukuze kuphendulwe ngokukhawuleza. Amashishini afana neoyile negesi, izityalo zeekhemikhali, kunye nokuveliswa kombane axhomekeke kwi-SDV ukuthintela iingozi nokukhusela abasebenzi.
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Uphawu lweValve yokuvala: Iimpawu eziphambili
Uphawu lwe-SDV lwakhela kwiimpawu zevalvu ezisemgangathweni kodwa luqukaizihlonzi ezithile zomsebenzi wayo ongxamisekileyo:
1. Uphawu oluSisiseko: Isangqa (esimele ivalvu ejikelezayo) okanye uxande (ivalvu ethe tyaba).
2. Uphawu loKusebenza: Utolo oluthe tyaba okanye i-lightning bolt ukubonisa ukusebenza ngokuzenzekelayo.
3. Ithegi yoKhuseleko: Idla ngokubizwa ngokuba yi-“SDV” okanye ikhatshwa yikhowudi yombala obomvu kwimizobo yedijithali.
4. Imo Ekhuselekileyo YokungaphumeleliIimpawu ezifana no-“FC” (fail-closed) okanye “FO” (fail-open) zinokuvela ecaleni kwayo.
Umzekelo, iUphawu lwe-SDVKwi-P&ID kunokudibanisa uphawu lwevalvu yebhola (isangqa ngomgca) kunye notolo lwentshukumo kunye nelebheli ethi "SDV".
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Usetyenziso kunye nokubaluleka kweempawu zeValve yokuvala
1. Iinkqubo zoKhuseleko kwiindawo eziyingozi
Iimpawu ze-SDV zibalulekile kumashishini asebenza ngezinto ezinokutsha okanye ezinobungozi. Umzekelo, kwisixhobo seoyile esiselunxwemeni, uphawu lwe-SDV kwi-P&ID lubonisa iivalvu ezivala ngokuzenzekelayo ukuthintela ukuchitheka ngexesha lokuvuza kwegesi.
2. Ukuthobela iMigangatho
Ukusebenzisa iimpawu ze-SDV ezisemgangathweni kuqinisekisa ukuthotyelwa kwemigaqo yamazwe ngamazwe efanaISA-5.1okanyeI-ISO 14617, ukunciphisa iimpazamo ngexesha lokuhlolwa okanye ukuphuculwa kwenkqubo.
3. Unxibelelwano oluphuculweyo
Iimpawu ezicacileyo zisusa ukungacaci. Uphawu lwe-SDV olubekwe endaweni engafanelekanga lunokubangela ukuvalwa okulibazisekileyo, oku kubeka ubomi kunye nezixhobo emngciphekweni.
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Indlela yokusebenzisa iisimboli zeValve yokuvala ngokuchanekileyo
Ukuze kuthintelwe ukutolikwa gwenxa:
1. Landela iMigangatho yoShishino: Landela izikhokelo ze-ISA okanye ze-ISO zoyilo lweempawu.
2. Ileyibhile ecacileyo: Soloko uquka iithegi ze-“SDV” kunye neendlela zokukhusela ukungaphumeleli.
3. Uxwebhu olukwiinganekwane: Nika umzobo wentsomi echaza zonke iimpawu.
4. Amaqela oQeqesho: Qinisekisa ukuba iinjineli kunye neengcali ziyayiqonda imithetho yeempawu.
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Ukuthelekisa Iimpawu ze-SDV nezinye Iimpawu zeValve
Ukugxininisa umahluko:
- Uphawu lweValve yoNcedo: Unxantathu onomgca othe tye, osetyenziselwa ukukhulula uxinzelelo.
- Uphawu lweValve yoLawulo: Isangqa esinomgca othe nkqo, odla ngokubizwa ngokuba yi-“CV.”
- Uphawu lweValve yeBhabhathaneImigca emibini egobileyo edibana nesangqa.
Ngokungafaniyo nezi,Uphawu lwe-SDVibeka phambili ukuhlukaniswa okukhawulezileyo, idibanisa iimpawu zokubonakalisa amandla kunye neelebheli zokhuseleko.
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Isiphelo
Vala ivalvuIimpawu azikho nje kwimizobo—ziyindlela yokuphila kukhuseleko lwemizi-mveliso. Ngokuqonda uyilo lwazo, usetyenziso lwazo, kunye nokusetyenziswa kwazo ngokufanelekileyo, iinjineli zinokuqinisekisa ukuba iinkqubo zisebenza ngokukhuselekileyo nangokufanelekileyo. Nokuba zibhala i-P&ID okanye zisombulula ingxaki kwisityalo, ukuchaneka kwiimpawu zevalvu ezifana ne-SDV akunakuxoxiswana ngako.
Ngokudibanisa ezi ndlela kunye nokuqaphela umahluko phakathi kweempawu ze-SDV kunye nezinye iintlobo zeevalvu (umz., isango, ibhola, okanye iivalvu zokujonga), iingcali zinegalelo kwimisebenzi yemizi-mveliso ekhuselekileyo nethembekileyo kwihlabathi liphela.
Ixesha leposi: Epreli-30-2025