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:100225855(2008)0420005204:(1957-),,,,,,,,(,110043),;;:TH134:ADesignandimprovementofemergencycut2offvalveequippedwithoverflowvalveLIGui2jie,LIUJi2xue,LIUDong2ju,DONGChun2yan,ZHOUXiu2jie(Shenyangxinguangvalvemanufacturingplant,Shenyang110043,China)Abstract:Introducesthemainapplicationsofliquidchlorine,expoundsworkingprincipleandperfor2mancecharacteristicsofthenewtypeofemergencycut-offvalveequippedwithoverflowvalveusedforliquidchlorinestorage-transportationequipment,aswellasdesignandcalculationmethods.Keywords:overflowvalve;emergencycut-offvalve;design1,,,,,,,,,2(1),(),,(),,,,(23min)(),,,3311,,,,,,DN50mm,LCB2535312,,,,,,,520084(0Cr18Ni90Cr18Ni9Ti1Cr18Ni91Cr18Ni9Ti),,-196600,,313,,,1Cr18Ni9,,,314,,,,,(a)(b)1315OO,,,O4411,,,,,SBSB=PDN213[L]-P+CSB,mmDN,mmP(PN),MPa620084[L],MPaC(1),mm1CmmSB-C56101120213030C54321412,(1)QLZ(QYJ+Qg)(QDF+Qg),,QYJQYJ=DDPbDSqYJQYJ,NDDP,mmbDS,mmqYJ,MPa,QDFQDF=2DDPbDSmDPPQDF,,NmDPQgQg=QDJQDJ,NQDJ=DDP2P012013(2),LL=QLZFL[L]FL,mm2(3),W1W1=fMZSM2DNW2W2=(1133he+1)MZh2DNW3=YMZh2DN-ZW2W1[WJ]W2[WP]W3[WP]f(hJ/SBDN)hJ,mmhJ=5(Sm-SB)MZ,NmmMZ=QNJI1+(QDJ-QNJ)I2+QDI3QNJ,NQNJ=4DN2PQD,NQD=QLZ-QgI1I2I3,mmI1=D1-DN-Sm2I2=2D1-DN-Sm4I3=D1-DDP2=he+1T+h3kh,mmee=FSBDNF(h/SBDNSm/SB)T(K=D3/DN)k,mm3k=UFSBSBDNU(k)[WJ]([WJ]=115[L]),MPa[WP]([WP]=1125[L]),MPaYZ(k)720084()=41LFdFdF,mmLF(),mm()1(),1,,12(2),,[]W1,MPa=QF201785d2FQF2,N[]W1,MPa[]W1=a-bnwab,MPanw(nw=215)2,,[]W2[]W2,MPa[]W2=2Enw2E(E=2102107),MPa5,2,,,622,,(),,(),,(),O,,,,,,,,,,,,,,,,(),(),(),(),,,,,,,(12)820084[]KK=4C-14C-4+01165CCD2DD2=CdTD=D2+dTkk=FTmax-FTmink,kg/m,mmnn=GdT48kD23maxminmax=FTmaxkmin=FTmink,=max017H0H0=(n+115)dT+PP=H0-115dTn,(2),,FLFL=01785DL2PLFTmax+MnmaxL+FQFL,NDL,mmPL,MPa(),(3),,dhdh1127Qvdh,mmQ,mm3/sv,m/s5,,,1.M.:,2002.2.M.:,2002.(:2008103106)(8)7,,,,1,,.M.:,1986.2.M.:,1992.3.M.:,1982.4JB/T7248-1994,S.5GB/T699-1999,S.(:2008101129)2120084