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PN100、DN450手动三瓣式天然气管线球阀设计A1A2A0A3A4A5A6A7A8A9A10A3A11A12A13A14A15A16A17A18A19A20A21A22A19A23A24A25A26A27A28A29A30A31A32A33A34A20A35A36A37A38A39A19A20A40A41A42A23A43A44A45,A46A47A48A49,A42A50A51A52A53A54,A55A27A56A57A58A59A36A60A61A62A63A64A65A48A66A67A68A69A70A29A71A72A20A73A74A75A20A76A77A20A78A58A79A36A80A81A82A83A59A84A85A86A19A20A87A88A89A69A29A90A91A92A93A19A94A95A96A97A98A19A20A29A81A82A99A100A76A101A102A36A81A82A99A100A30A31A103A104A105A81A82A82A106A73A107A108A81A82A73A30A31A109A110A28A29A111A112A113A114A36A115A116A117A118A119A29A31A120A121A122A123A124A125A73A124A101A126A41A19A20A29A107A108A121A81A82A127A128A86A19A20A87A20A23A73A129A20A23A73A20A130A73A20A131A73A19A23A73A95A96A132A133A73A134A135A136A137A138A76A139A140A137A138A57A30A31A109A110A28A29A81A82A36A141A142A80A81A82A87A20A23A143A144A145A146A111A112A29A113A114A147A148A86A82A106A149A150A100A121A151A152A86A67A26A153A154A155A156A121A127A128A86A67A26A157A158A29A159A153A90A160A36A80A81A82A161A25A92A93A19A94A95A96A19A20A29A81A82A162A163A90A93A29A122A123A36A164A165A166A167A97A98A19A20A81A82A132A65A95A96A92A93A19A19A20ABSTRACTBALLVALVEHASBECOMETHEPRIMARYCHOICEOFTHELONGDISTANCEPIPELINEITISTHEMAJORCLOSURETYPESOFVALVESTOCUTOFFASBALLFULLBOREPERFORATIONBALLVALVEHASTHEADVANTAGESOFSMALLFLOWRESISTANCE,SAVINGENERGYA168UNRESTRICTEDFLOW,FASTHOISTANDSOONITHASEXCELLENTTECHNICALPERFORMANCETHANSTOPVALVES,PLUGVALVESANDBUTTERFLYVALVESTHISPROJECTINTRODUCESTHEDESIGNPROCESSANDTHECONTENTOFTHESOFTSEALINGTYPEOFFIXEDBALLPIPELINESBALLVALVEWEREINTRODUCED,WHICHISTHEMOSTCOMMONLYUSEDONETHEDESIGNPROCESSMAINLYINCLUDEDDESIGNANDCALCULATION,STRUCTURALDESIGN,MAINSPAREPARTSTRENGTHEXAMINATIONACCORDINGTOTHEREQUIREMENTSINTHETASKOFTHEDESIGN,REFERENCEDTOTHESTRUCTUREOFTHEINTERNATIONALANDINTERNALEXISTINGBALLVALVES,ANDCOMPLETEDTHEDESIGNOFTHEINTERMEDIATEBODY,THESIDEBODY,BONNET,STEM,BALL,SEALINGSPRINGA168ELECTROSTATICPREVENTIONDEVICE,DRIVEACTUATORANDMAINSPAREPARTSAIMINGATTHESTRENGTHOFTHECHECKVALVEBOLTLOADTOCOMPUTERPROGRAMMING,TRANSLATIONOFTHERELEVANTLITERATURE,ANDCOMPLETEDTHERELEVANTTOPICOFATHESISTHEDESIGNCANPROVIDECERTAININFORMATIONFORTHEDESIGNOFTHESOFTSEALINGTYPEOFFIXEDBALLPIPELINESBALLVALVEKEYWORDSPIPELINESBALLVALVEDESIGNELASTICSEALINGFIXEDBALLVALVEA169A170A170A171A172A171A172A171A173A174A175A176A177A178A179A180A181A182A183A184A175A185A186A187A188A189A190A191A192A193A194A195A196A197A198A199A200A201A202A203A204A205A206A207A208A209A210A211A212A213A214A215A216A217A209A200A201A218A219A220A221A222A223A224A225A226A227A228A229A204A205A206A198A230A218A220A221A231A232A233A234A192A235A236A237A198A199A226A238A239A218A240A241A192A242A243A238A239A218A240A244A203A245A246A192A247A248A198A249A203A250A251A224A252A253A254A255A227A67A0A240A1A2A246A3A192A243A58A217A209,A240A241A55A4A5A236,A80A6A7A207A83A8A224A225A42A9A10A11A12A217A13A14A15A194A16A218A17A18A227A96A97A19A227A203A20A227A21A83A22A192A211A212A23A195A200A198A199A226A24A25A218A227A228A224A255A227A218A70A26A27A28A203A29A30A31A32A33A225A34A35A192A115A36A37A38A29A96A37A70A26A117A55A39A40A41A224A123A194A218A255A227A70A26A43A44A212A45A127A255A255A227A46A47A48A255A255A227A49A50A51A224A134A250A52A53A194A54A56A28A47A48A255A57A59A60A70A26A192A142A61A62A63A192A146A212A202A206A198A199A194A227A192A212A247A64A255A227A65A194A218A66A252A192A250A52A211A68A69A59A60A70A26A96A152A71A72A73A70A26A203A74A75A70A26A224A15A92A212A74A18A255A1A46A59A60A76A96A227A77A78A79A81A38A82A218A84A85A86A87A88A89A192A171A90A23A74A84A85A90A91A224A93A94A94A95A98A99A100A101A95A98A99A100A95A102A103A104A104A105A105A106A107A108A109A110A111A107A108A110A111A112A113A114A116A112A118A119A120A121A122A124A125A113A126A128A129A130A131A132A114A133A135A136A137A138A139A140A141A125A143A118A138A140A144A179A145A147A148A149A150A151A153A147A154A181A155A144A145A147A156A157A158A159A160A161A162A163A188A189A164A165A166A167A168A169A170A172A173A174A175A147A176A177A178A180A182A183A184A156A185A186A187A190A191A192A145A193A144A194A169A195A18590A144A145A193A156A148A196A197A198A147A193A148A199A200A201A202A203A204A167A205A206A144A145A147A207A208A209A210A211A212A167A211A213A156A172A157A154A214A215A215A216A216A217A218A219A220A221A218A219A2221A223A224A225A226A227A228A229A230A231A232A233A234A235A236A237A238A239A233A234A235A240A241A242A243A233A237A224A244A245A240A246A247A248A238A249A250A239A251A247A252A249A253A239A240A254A255A226A227A221A0A1A2A3A251A4A5A252A249A233A6A7A226A227A240A179A8A9A10A11A12A13A20A227A14A15A11A16A17A18A19A21A41A2122A213A211A22A23A24A96A25A26A218A27A15A11A8A194A28A29A30A31A32A33A34A35A36A3790A235A38A39A40A42A211A43A42A22A37A44A20A185A45A46A238A47A48A24A49A50A41A2123A213A140A51A52A53A240A54A55A56A15A11A16A11A57A58A59A60A61A62A63A64A65A66A67A52A68A69A70A71A20A194A28A72A73A74A140A51A16A140A51A52A45A46A89A75A20A115A76A77A140A51A78A79A16A80A81A82A226A83A78A79A84A85A226A86A87A88A90A185A91A41A2124A213A92A93A94A218A27A61A62A63A64A65A10A95A53A16A97A98A99A52A20A83A15A128A16A100A101A102A223A21A20A115A76A218A27A15A128A80A81A81A103A16A104A105A20A148A84A85A226A106A107A20A108A115A109A91A40A15A11A16A148A60A92A93A41A2125A213A12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