Extracting device and method thereof

Abstract

The invention relates to an extracting device which comprises a cylinder body, a piston, a pull rod, a buffer matter supply unit and a buffer unit, wherein the cylinder body comprises a hollow cavity which is provided with a first opening at the tail end of the cylinder body and a second opening that is positioned at the front end of the cylinder body and is communicated with the hollow cavity; the piston is positioned into the hollow cavity, the edge of the piston contacts with the wall of the hollow cavity and divides the hollow cavity into a first region and a second region, the first region is positioned between the piston and the front end of the cylinder body, the second region is positioned between the piston and the first opening; the pull rod is connected to the piston and moves the piston; the buffer matter supply unit provides a buffer matter to the second region so as to inhibit impurities from entering the first region; the buffer unit enables the second region to form a closed space and to collect the buffer matter; when the piston moves towards the tail end of the cylinder body, a material is extracted to the first region through the second opening, and the buffer matter is discharged into the buffer unit.

Description

technical field [0001] The present invention relates to an extracting device and method, in particular to an extracting device and method for isolating impurities. Background technique [0002] figure 1 It is a schematic diagram of a known extraction device. As shown in the figure, the known extraction device 100 includes a cylinder 110, which includes a hollow chamber 150, and an opening 140 is located at the front end 112 of the cylinder 110 to communicate with the hollow chamber 150. A piston 120 is located in the hollow chamber 150, and a pull rod 130 is connected to the piston 120 so that the piston 120 moves in the hollow chamber 150. When the piston 120 moves toward the end 114 of the barrel 110, the substance to be extracted is drawn through the opening 140. Aspirated into the hollow chamber 150 , when the piston 120 moves toward the front end 112 of the barrel 110 , the extracted substance in the hollow chamber 150 is discharged through the opening 140 . However, ...

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Problems solved by technology

[0003] Therefore, there are above-mentioned inconveniences and problems in the known extracting device.

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