進口球閥的發明及應用歷史
閱讀:274發布時間:2012-12-14
進口球閥的發明及應用歷史
進口球閥問世于20世紀50年代,隨著科學技術的飛速發展,生產工藝及產品結構的不斷改進,在短短的40年時間里,已迅速發展成為一種主要的閥類。在西方工業發達的國家,球閥的使用正在逐年不斷的上升,在我國,球閥被廣泛的應用在石油煉制、長輸管線、化工、造紙、制藥、水利、電力、市政、鋼鐵等行業,在國民經濟中占有舉足輕重的地位。球閥是由旋塞閥演變而來。它具有相同的旋轉90度提動作,不同的是旋塞體是球體,有圓形通孔或通道通過其軸線。球面和通道口的比例應該是這樣的,即當球旋轉90度時,在進、出口處應全部呈現球面,從而截斷流動。主要的球閥細分有:進口高壓球閥,進口美標球閥,進口日標球閥,進口保溫球閥,進口三通球閥,進口電動球閥,進口氣動球閥,進口不銹鋼球閥,進口螺紋球閥,進口全焊接球閥,進口兩片式球閥,進口三片式球閥,進口渦輪全焊接球閥,進口高壓小型球閥,進口高壓焊接球閥。
BallvalvesstartanothertechnologyclimaxTheballvalveintroducedinthe1950s,withtherapiddevelopmentofscienceandtechnology,productionprocessesandproductmixofcontinuousimprovementinashortspanof40years,hasquicklydevelopedintoamainvalve.InWesternindustrializedcountries,theuseoftheballvalveisyearbyyearcontinuallyrisinginChina,theballhasbeenwidelyusedinpetroleumrefining,thelongpipeline,chemical,paper,pharmaceutical,water,electricity,municipal,ironandsteelindustryoccupiesapivotalpositioninthenationaleconomy.Theballvalveisevolvedfromthestopcock.Ithasthesameaction,rotate90degreestomentionisthecockbodyisasphere,acircularthrough-holeorchannelthroughitsaxis.Sphereandtheratioshouldbesuch,thatiswhentheballspins90degrees,intotheexitshouldbefullyrenderedsphere,thuscuttingofftheflow.