A new type of pipetting device

Abstract

The invention provides a novel liquid moving device which comprises a mounting plate. A slidable lifting support and a control mechanism are arranged on the mounting plate, a plurality of electromagnets are arranged below the lifting support and fixed on the lifting support through a magnet fastening mechanism, the magnet fastening mechanism can be simultaneously used for adjusting the distance between the electromagnets, a plurality of liquid moving pipes corresponding to the electromagnets are arranged below the electromagnets, pistons are arrange din the liquid moving pipes, magnet attraction blocks are arranged at the tops of the pistons and attracted with the corresponding electromagnets, the liquid moving pipes are fixed on the mounting plate through a liquid moving pipe fixing mechanism, the liquid moving pipe fixing mechanism can be simultaneously used for adjusting the distance between the liquid moving pipes, and scale identifications are arranged on the mounting plate and the lifting support. The liquid moving device is simple in structure and high in universality, the number of actual use channels of the liquid moving device can be selectively controlled, so that friction among other pistons and the inner walls of the corresponding liquid moving pipes is avoided when the liquid moving device is used, and higher accuracy of the liquid moving device still can be ensured after the liquid moving device is used for a long time.

Description

technical field [0001] The invention mainly relates to a liquid pipetting device, in particular to a novel liquid pipetting device capable of adjusting distance and selecting pipettes. Background technique [0002] Liquid pipetting devices are widely used in the fields of biology and chemistry, and are mainly used for sample processing and analysis. Liquid pipetting devices generally have two working modes, one is a single-channel structure, that is, it is used alone to move a certain volume of liquid from one position to another, and the other is a multi-channel structure, which distributes equal amounts of liquid at one time to multiple destinations. There is a multi-channel liquid pipetting device on the market. Its structure is to fix multiple pipettes in a row on the mounting plate, and pistons are arranged in the pipettes. One piston corresponds to one pipette, and multiple pistons pass through the same pipette. The driving mechanism realizes synchronous movement. Th...

AI Technical Summary

Problems solved by technology

There is a multi-channel liquid pipetting device on the market. Its structure is to fix multiple pipettes in a row on the mounting plate, and pistons are arranged in the pipettes. One piston corresponds to one pipette, and multiple pistons pass through the same pipette. The driving mechanism realizes synchronous movement. This structure is simple and can ensure the accuracy of reagent dosage, but it still has the following problems in actual use: 1. Low versatility: the number of pipettes determines the number of channels of the pipetting device, such as 1 channel, 4 channels, 8 channels, 12 channels, etc. In actual use, different channels generally need to use pipetting devices corresponding to the number of channels, and it is not suitable to mix them. For example, a 4-channel pipetting device only uses 1 channel in actual use. Since the pistons in the four pipettes move synchronously, it will cause wear on the other three pistons and the inner wall of the pipette, which will affect the accuracy of the pipetting device after long-term use; 2. The distance between the pipettes is fixed , can not be adjusted accordingly, it can only be applied to the sample container with the corresponding spacing, and the versatility is low

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