Paper wrapping device of test tube

Abstract

The invention discloses a paper wrapping device of a test tube. The paper wrapping device comprises a pedestal, a contraction rack and a neck ring; the top of the pedestal is provided with a bearing cavity which matches the bottom of the test tube, the top of the bearing cavity is provided with support grooves distributed uniformly along the circumference, and first through holes are arranged in the support grooves; the contraction rack comprises elastic branch bars, and the end portions of the branch bars penetrate the first through holes and are fixedly connected to the central position of the bearing cavity, the neck ring comprises a paper grapping mechanism, second through holes and a hidden groove, and sleeves the contraction rack via the second through holes, the hidden groove is embedded in the neck ring; the paper grapping mechanism comprises a telescopic rod and a deformation claw, the telescopic rod is movably connected to the neck ring, the end portion of the telescopic rodis fixedly connected with the deformation claw, and the deformation claw is distributed asymmetrically by taking the position where the telescopic rod is connected with the deformation claw as the center; and the deformation claw includes a slice in which the center of the vertical section is protruded towards the axial center of the neck ring and the edge of the vertical second is far from the axial center of the neck ring. Thus, the paper wrapping efficiency of the test tube can be improved.

Description

technical field [0001] The invention relates to the field of air environment detection, in particular to a test tube wrapping device. Background technique [0002] When analyzing PM2.5 components, it is necessary to capture the gas, and then use different reagents to dissolve and extract the components to be analyzed. ROS is a kind of free radical, and current research shows that it is the main source of damage to the human body. Due to the high reactivity of ROS, traditional offline sampling still uses manual detection of ROS content in the atmosphere, which not only requires a lot of time and labor, but also has two serious problems: 1. The operating habits of different experimental analysts and experimental There are differences in levels, which reduces the comparability of data measured by different experimenters, and even draws wrong conclusions. 2. Part of the ROS in atmospheric particulate matter is active in chemical properties and has a short lifespan, and it take...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the test tube filter paper wrapping efficiency is low in the prior art and is not suitable for a large number of continuous detection, the present invention provides a test tube wrapping device

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