車輛制動裝置VehicleBrakingDevice任務六120型控制閥TASK6120TYPECONTROLVALVE主講人李西安ZHENGZHOURAILWAYVOCATIONAL&TECHNICALCOLLEGESpeakerLiXi’an120型控制閥的特點Thecharacteristicsof120typecontrolvalve一在緊急放風閥中設有先導閥結構。Apilotvalvestructureisprovidedintheemergencyventvalve.在120/120-1型空氣控制閥的主閥中增設加速緩解閥，與增加的一個加速緩解風缸相配合，Anaccelerationreliefvalveisaddedtothemainvalveofthe120/120-1typeaircontrolvalve,whichiscombinedwithanadditionalaccelerationreliefaircylinder.120型空氣控制閥仍采用二壓力機構，直接作用方式，主控機構仍采用橡膠膜板和金屬滑閥結構。120/120-1typeaircontrolvalvestilladoptstwopressuremechanismanddirectactionmode,andthemaincontrolmechanismstilladoptsrubberfilmplateandmetalslidevalvestructure.適應壓力保持操縱。Adjusttopressuretomaintaincontrol.120/120-1型空氣控制閥在主閥作用部的滑閥上設了一個φ0.2的眼淚孔（呼吸孔），使控制閥在常用制動以后的保壓位時，溝通制動管和副風缸，這樣可在長大下坡道上配合機車對制動管漏泄有自動補風（壓力保持）功能。120/120-1typeaircontrolvalveisprovidedwithadiameter0.2tearhole(breathinghole)ontheslidevalveofthemainvalveactionpart,sothatthecontrolvalvecancommunicatethebraketubeandtheauxiliaryaircylinderwhenthepressureismaintainedafterthecommonbraking.Inthisway,thelocomotivecanuseabrakecontrolonthelongdownhillroadandthelocomotivehasanautomaticair(pressuremaintenance)functionforthebraketubeleakagewhenthebrakepressureismaintained.設置半自動緩解閥。Setthesemi-automaticreliefvalve.12345120型控制閥構造120typecontrolvalvestructure二120閥由中間體Intermediate主閥Mainvalve半自動緩解閥（以下簡稱緩解閥）semi-automaticreliefvalve(hereinafterreferredtoasreliefvalve)緊急閥Emergencyvalve等四部分組成。The120valveiscomposedoffoursections:intermediate,mainvalve,semi-automaticreliefvalve(hereinafterreferredtoasreliefvalve)andemergencyvalve.120型控制閥構造120typecontrolvalvestructure二還起到連通制動主管、副風缸、制動缸、加速緩解風缸與主閥和緊急閥的各個氣路作用。Italsoplaystheroleofconnectingthebrakemain,auxiliaryaircylinder,brakecylinder,acceleratingandrelievingtheaircylinderandthemainvalveandemergencyvalve.中間體Intermediate中間體是用來安裝主閥和緊急閥，并通過4個突耳上的φ22孔，用螺栓和螺母將整個閥直接吊裝在車輛底架上。Theintermediateisusedtoinstallthemainvalveandtheemergencyvalve,andthewholevalveishoisteddirectlytothevehiclechassiswithboltsandnutsthroughthediameter22holesonthefourlugs.充氣緩解Gasrelief1120型控制閥構造120typecontrolvalvestructure二120型空氣控制閥采用二壓力控制機構直接作用方式，有三個基本作用The120typeaircontrolvalveadoptsthedirectactionmodeofthetwo-pressurecontrolmechanismandhasthreebasicfunctions120型空氣控制閥的作用原理120typeaircontrolvalveprincipleofaction120型控制閥構造120typecontrolvalvestructure二減壓制動2Vacuumbrake制動保壓Brakepressureholding3120型控制閥構造120typecont