上展式放料阀是用于物料在高压状态下迅速混流经发送器进入管道的开启物、气两相流阀,它也是气力输送关键设备之一。但是现在所使用的上展式放料阀的密封效果差,端盖与阀芯之间的摩擦力大,使用寿命短,容易损坏。
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在饲料尤其是摩力锌等生产过程中,常常用到混合机。现有的混合机上展式放料阀为通用蝶阀,该阀门在混合机放料时灰尘较大,操作环境恶劣,操作时阀门开关较紧,工人操作不便,且必须在放料口另外增加一个吸尘罩,以避免操作工人吸入大量粉尘,对身体健康不利,这种结构的上展式放料阀放料操作不方便,吸尘效果也欠佳,同时采用蝶阀和吸尘罩,设备投资也较大。
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上展式放料阀圆柱形阀芯腔内设有吹扫孔,所述吹扫孔通过快开气阀与高压气泵相连,所述快开气阀由所述气动执行器同步控制开闭,通过高压空气对阀芯腔进行吹扫,避免存积的物料对阀芯和阀芯腔造成损坏。上述的上展式放料阀,所述异形柱的弧面上涂覆一层耐磨涂层,以提高阀芯的使用寿命。