Piston-type minisize filter pump

Abstract

The invention discloses a piston-type minisize automatic pumping filter specially designed for laboratory use, a filter with a filter membrane is additionally arranged in a liquid one-way transport pipeline comprising a flow guiding pipe, a one-way valve, a piston and a small volume liquid barrel for completing the filtration, the one-way valve is used for separation of a liquid suction pipe and a liquid discharging pipeline, liquid transport power is directly provided by piston reciprocating motion; the rotation of a motor shaft is transformed into the linear motion of the piston by screw rod-nut transmission; liquid suction pipe and liquid discharging processes can be independently controlled and regulated; the rotation direction of a motor can be converted by automatic switching of the electrifying direction of the motor by use of a string for correlation of the movement of a reversing switch and the piston, and automatic piston reciprocating motion can be formed to realize automatic circulation of the liquid suction pipe and liquid discharging processes. When in use, the filtration can be realized only by connecting the flow guiding pipe, arranging the filter, electrifying, and adjusting the liquid discharging speed, the piston-type minisize automatic pumping filter is small in size, light in weight, convenient in operation and high in work efficiency, has other uses, and ist more suitable for laboratory filtration compared with other filter equipment.

Description

technical field [0001] The invention relates to an automatic filtering device, which uses electric power to drive a piston to automatically go back and forth to pump and discharge liquid, and realizes filtration and can directly pack collected liquid during the process. Small in size, light in weight, easy to use and operate, more suitable for laboratory filtration than other existing devices. Background technique [0002] In laboratory work in the fields of medical treatment, scientific research, teaching, etc., it is often necessary to filter some liquids to remove bacteria and impurities, and sometimes it is necessary to perform aseptic operations in ultra-clean workbenches to make the collected liquids free of microbial contamination. The usual method of artificial sterile filtration is to use a syringe to extract the liquid to be filtered in the ultra-clean workbench, and install a disposable filter with a filter membrane (aseptically treated at the factory, which conta...

AI Technical Summary

Problems solved by technology

[0005] In order to completely replace the time-consuming, labor-intensive, inefficient and risky manual aseptic filtration for impurity removal, and to overcome the defects of existing filters with large volume, inconvenient use, and unsuitability for sterile filtration, it is designed as a small, easy-to-operate, Automatic filter with high working efficiency and adaptable to aseptic requirements

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