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                應用知識
                不銹鋼球閥的工作原理
                發布時間:2013-09-09 12:13:48
                一、不銹鋼球閥簡介:
                  不銹鋼球閥具有磨擦系數低、操作力矩小、泄露量最高可達零泄露等優點,多種閥座材料可供選擇,適應范圍更廣。其密封形式主要有軟密封球閥和硬密封球閥兩大類。常溫型采用四氟密封,高溫型可采用對位聚苯或金屬硬密封。不銹鋼球閥主要由:閥體、閥芯、閥座、閥桿等零件組成。不銹鋼球閥廣泛應用與石油、化工、冶金、輕工、造紙、電站、制冷等工作領域。
                  二、分析不銹鋼球閥開啟過程:
                  1、在關閉位置,球體受閥桿的機械施壓作用,緊壓在閥座上。
                  2、當逆時針轉動手輪時,閥桿則反向運動,其底部角形平面使球體脫開閥座。
                  3、閥桿繼續提升,并與閥桿螺旋槽內的導銷相互作用,使球體開始無摩擦地旋轉。
                  4、直至到全開位置,閥桿提升到極限位置,球體旋轉到全開位置。
                  三、分析不銹鋼球閥關閉過程:
                  1、關閉時,順時針旋轉手柄,閥桿開始下降并使球體離開閥座開始旋轉。
                  2、繼續旋轉手輪,閥桿受到嵌于其上螺旋槽內的導銷的作用,使閥桿和球體同時旋轉90°。
                  3、快要關閉時,球體已在與閥座無接觸的情況下旋轉了90°。
                  4、手輪轉動的最后幾圈,閥桿底部的角形平面機械地楔向壓迫球體,使其緊密地壓在閥座上,達到完全密封。
                  四、不銹鋼球閥特點:
                  1、開關無誤的手柄:采用扁頭閥桿,與手柄的連接不會錯位,從而保證手柄指示的開關狀態與閥一致辭。
                  2、閥桿防飛結構:閥桿為下裝式,防止受壓飛出,同時可在火災后,與閥體形成金屬接觸,確保閥桿密封。
                  3、鎖緊裝置:為防止閥門開關誤操作,在閥門全開、全關位置有鎖定孔,確保閥門處于正確的位置。
                  4、先進的閥座:聚多年球閥制造經驗而設計的閥座,確保閥門密封,磨擦系數低,操作力矩小、多種閥座材料、適應范圍廣。
                 
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