A test tube brush for cleaning volumetric flasks

Abstract

The invention relates to a test tube brush for cleaning volumetric flasks, which is characterized in that it includes a main body brush rod, a bundle of tubes is sheathed on the main body brush rod, and two first pairs of tubes are symmetrically connected at the bottom of the bundle tubes. One end of the body brush rod, the other end of each first auxiliary body brush rod is rotatably connected to one end of a second auxiliary body brush rod, and the other end of the second auxiliary body brush rod is rotatably connected to the main body At the bottom end of the brush rod, the two second secondary body brush rods are symmetrically arranged with respect to the main body brush rod, and the two brush rods of the first secondary body and the two second secondary body brush rods The outer walls of the bristles are respectively fastened and connected with bristles. The invention can thoroughly clean the volumetric flask, has high cleaning speed and good safety.

Description

technical field [0001] The invention relates to a test tube brush used for cleaning volumetric flasks, belonging to the field of laboratory cleaning appliances. Background technique [0002] When carrying out work in the laboratory, the configuration of various standard solutions is often used, and the configuration of these standard solutions is mainly completed by volumetric flasks. The volumetric flask is a pear-shaped flat-bottomed glass bottle with a slender neck and a ground glass stopper. Since there is a scale on the neck, it means that when the meniscus of the liquid is tangent to the marking line on the neck of the volumetric flask at the indicated temperature, The volume of the solution is exactly equal to the volume marked on the neck of the bottle, so the solution of a certain amount of substance can be accurately prepared. As a precision instrument for directly preparing standard solutions and accurate dilution solutions and preparing sample solutions, its tho...

AI Technical Summary

Problems solved by technology

In order to meet the cleaning work of glass instruments with this structure, although there are also some test tube brushes for this structure, that is, the brush filaments are short at the top and long at the bottom, but because the brush filaments are too long, it is difficult to pass through the slender bottleneck on the upper part of the volumetric flask. Can be strenuously pushed through, may cause neck breakage or bending of the bristles, thus not achieving a thorough cleaning of the bottom

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