Vertical oscillation mechanism for extraction pretreatment

Abstract

The invention discloses a vertical oscillation mechanism for extraction pretreatment. The vertical oscillation mechanism comprises a driving mechanism, an eccentric balancing weight, a crank, a test tube rack, a vertical slide rail and an elastic mechanism; the driving mechanism is connected with the middle of the eccentric balancing weight and drives the eccentric balancing weight to rotate; an eccentric shaft and a balancing weight are arranged at the two ends of the eccentric balancing weight respectively and are symmetrically arranged, and the eccentric shaft is hinged to the lower end of the crank; the upper end of the crank is hinged to a test tube rack, and the test tube rack is arranged on the vertical sliding rail in a sliding mode, and thus the driving mechanism drives the test tube to do vertical reciprocating motion along the vertical slide rail; and an elastic mechanism is arranged below the test tube rack in the direction of the vertical sliding rail, the bottom of the test tube rack is connected with the elastic mechanism, and the balancing weight is used for balancing the centrifugal force of the vertical reciprocating motion of the test tube rack and the test tube. According to the vertical oscillation mechanism, high-speed reciprocating motion is realized on an organic matter sample, so that the organic matter fully collides with the tube wall of the test tube, the cell wall of the organic matter is damaged, pesticide residues in the organic matter are extracted, the impact inertia is balanced, and the stability is good.

Description

technical field [0001] The invention belongs to the technical field of experimental instruments, in particular to a vertical vibration mechanism for extraction pretreatment. Background technique [0002] Many samples in the laboratory need to be shaken, especially in the pretreatment process of organic extraction, which requires destructive pretreatment of the sampled organic matter. Now many laboratories either use multi-tube vortex vibration or ordinary hand vibration. Multi-tube vortex vibration fixes the test tube on the support and the support moves horizontally. Under this vibration method, the vibration distance of organic matter is short, and the organic matter cannot be separated from the container. The walls create high-velocity impacts that destroy organic matter. Ordinary hand shake is that the operator holds the sample tube in hand, swings the arm to reciprocate up and down, and shakes the sample in the sample tube. This operation process will cause high-intens...

AI Technical Summary

Problems solved by technology

Now many laboratories either use multi-tube vortex vibration or ordinary hand vibration. Multi-tube vortex vibration fixes the test tube on the support and the support moves horizontally. Under this vibration method, the vibration distance of organic matter is short, and the organic matter cannot be separated from the container. High-velocity impacts on the wall, destroying the organic matter

Ordinary hand shake is that the operator holds the sample tube in hand, swings the arm to reciprocate up and down, and shakes the sample in the sample tube. This operation process will cause high-intensity labor for the operator. Once a large number of samples are shaken , it needs multiple operators to complete, not only the labor cost and time cost increase, but also the work efficiency is not high

[0003] However, no matter whether it is multi-tube vortex oscillation or ordinary manual extraction, due to the inability to fully destroy the organic matter, a satisfactory extraction recovery rate cannot be obtained, and longer extraction time and stronger shaking intensity are required. The body has sufficient strength to avoid inertial damage caused by collisions

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