Detachable piette

Abstract

The invention discloses a detachable piette. The detachable piette comprises an upper pipetting device and a lower pipetting device. The upper pipetting device is internally provided with a rubber piston in a sleeving mode. Rubber hooks are arranged on the periphery of the bottom circle of the upper pipetting device. The lower pipetting device is internally provided with a piette body with scales in a sleeving mode. A liquid infusion pipe is fixedly connected to the bottom of the lower pipetting device, and a rubber ring is arranged on the periphery of the top of the piette. Reverse-hooked steel discs are arranged on the top of the lower pipetting device, and spring is fixedly connected between the reverse-hooked steel discs. The detachable piette is simple in structure, easy to install and replace and low in manufacturing cost, the design of the detachable piette can be widely applied to various sizes and specifications of piettes, the problems that a traditional piette has no reversible damage and cannot be repaired are solved, resources can be reasonably reused, and the detachable piette conforms to the national strategic measures of energy conservation and emissions reduction and can be generally used and popularized.

Description

technical field [0001] The invention belongs to the field of chemical sampling equipment, in particular to a detachable pipette. Background technique [0002] A measuring device used to accurately pipette a certain volume of a solution. A pipette is a measuring-dispensing instrument used only to measure the volume of a solution it dispenses. It is a long, thin glass tube with an enlarged section in the middle. Its lower end is beak-shaped, and a marking line is engraved on the neck of the upper end, which is a sign of the exact volume to be removed. [0003] In chemical experiment operations, it is often necessary to transfer a certain amount of liquid from one container to another, and then pipettes of different volumes are required. The tip of the existing pipette bottom for absorbing liquid is very thin, and the glass wall is relatively thin, so it is easily broken when in contact with other instruments and in specific experimental operations. And this tip is a necess...

AI Technical Summary

Problems solved by technology

The tip of the existing pipette bottom for absorbing liquid is very thin, and the glass wall is thin, so it is easy to break when in contact with other instruments and in specific experimental operations

The tip is a necessary part for liquid quantification. If it is damaged, the volume of the liquid pipetted will be inaccurate, so the pipette cannot be used again and can only be scrapped.

This can not be reused, resulting in a great waste of resources

On the other hand, some pipettes cannot quantitatively pipette, which will cause inaccuracy in the experiment, resulting in inaccurate experimental results, and, in some detachable pipettes, it is not considered that the liquid inside the pipette When it is filled with liquid and the internal air pressure is high, the liquid may overflow from the connection. For some corrosive liquids, this may corrode the relevant components of the connection. Quantitative pipetting is a relatively simple experimental operation, so in When designing the connection method and components of the joint, it is necessary to adhere to the principle of simple structure and convenient fabrication

Images