The invention discloses a rotary valve pump, in which the clearance of the pump sleeve is matched in the pump sleeve hole of the outer shell, one end of the pump sleeve is sealed by a second seal; the clearance of the pump rod is matched in the pump rod hole of the pump sleeve, and there is no seal between the two; at least two first step holes are arranged on the wall of the outer shell, and the liquid inlet and outlet nozzles are installed, and the liquid inlet and outlet channels of the liquid outlet nozzle and the liquid inlet and outlet on the pump slee The holes are correspondingly connected and sealed by the first seal. The outer diameter of the pump sleeve matches with the clearance of the hole diameter of the pump sleeve. The pump sleeve and the shell are independent. The pump sleeve is easy to disassemble and thoroughly wash. After long-term wear and tear, only the pump sleeve needs to be replaced without changing the shell, which saves the cost of use. A flat surface is arranged on the corresponding inlet and outlet passage of the pump sleeve. The first seal is arranged between the end face of the outlet nozzle or the inlet nozzle and the flat surface. A circular caisson is arranged in the back cover, and a second seal is arranged in the circular caisson. The first seal and the second seal can prevent the leakage of liquid into the gap between the pump sleeve and the outer shell.
【技术实现步骤摘要】
转阀泵
本专利技术涉及泵
,尤其是一种转阀泵。
技术介绍
目前,在医药、环境工程、石油及化工等行业,因为陶瓷材料耐磨、耐腐蚀、耐高温,所以转阀泵的关键部件如泵杆、泵套多采用陶瓷材质制作,但转阀泵的外壳一般采用金属材质例如不锈钢、铝材等,陶瓷泵套与金属外壳通常采用加热膨胀后的热套工艺配合,为了达到密封效果,其内部的结构较为复杂,在泵套与外壳之间设置多处密封圈、垫片等密封部件以防止液体渗漏,尤其是在泵杆等活动部件外周设置的密封圈、垫片等密封部件在泵杆快速且长期旋转或往复运动后,橡胶等基体经过摩擦后产生碎屑杂质,会污染药剂等液体;清洗时,密封圈和垫片很难清洗干净,因此通常只能用于一些对品质要求不高的液体如墨水等的计量灌装。“动密封”结构的密封圈易耗损需要经常更换,正常情况下一个月需更换一次,结构复杂的泵拆解更换密封圈需要耗费大量时间。另外,热套工艺的转阀泵在高温清洗灭菌时,外壳金属材质与内部泵套的陶瓷材质的热膨胀率不一致,导致配合间隙发生变化,液体容易渗透进入间隙中,导致污染。对于泵套外径与金属外壳内径的配合尺寸要求也非常严格,如果过大容易产生间隙,如果太小则对陶 ...
【技术保护点】
1.一种转阀泵,其特征在于:泵套(4)间隙配合在外壳(11)的泵套孔内,泵套(4)一端通过第二密封件(9)密封;泵杆(2)间隙配合在泵套(4)的泵杆孔(25)内,两者之间不设置密封件;外壳(11)壁面上开设至少两个第一台阶孔并安装有出液嘴(7)和进液嘴(13),出液嘴(7)和进液嘴(13)的进出液通道(12)与泵套(4)上的进出液孔(5)对应连通并利用第一密封件(8)密封。
【技术特征摘要】
1.一种转阀泵,其特征在于:泵套(4)间隙配合在外壳(11)的泵套孔内,泵套(4)一端通过第二密封件(9)密封;泵杆(2)间隙配合在泵套(4)的泵杆孔(25)内,两者之间不设置密封件;外壳(11)壁面上开设至少两个第一台阶孔并安装有出液嘴(7)和进液嘴(13),出液嘴(7)和进液嘴(13)的进出液通道(12)与泵套(4)上的进出液孔(5)对应连通并利用第一密封件(8)密封。2.按照权利要求1所述的转阀泵,其特征在于:所述泵套(4)与外壳(11)之间间隙配合的单边间隙值为0.01~0.05mm。3.按照权利要求1所述的转阀泵,其特征在于:所述泵套(4)与泵杆(2)之间间隙配合的单边间隙值为1~5um。4.按照权利要求1所述的转阀泵,其特征在于:在泵套(4)上对应进出液通道(12)设置扁平面(16),所述第一密封件(8)设置在出液嘴(7)或进液嘴(13)的端面与扁平面(16)之间。5.按照权利要求1所述的转阀泵,其特征在...
【专利技术属性】
技术研发人员:袁书清,
申请(专利权)人:无锡书谱尔精密机械科技有限公司,
类型:发明
国别省市:江苏,32
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