Adjustable quantitative pipette

Abstract

The invention discloses an adjustable quantitative pipette comprising a syringe-shaped liquid absorption cylinder and a plunger matching the liquid absorption cylinder. A liquid inlet is arranged on the liquid absorption cylinder at an end distal to the plunger. A handle is arranged on the plunger at an end distal to the liquid absorption cylinder. A positioning ring is arranged outside a cylindrical surface of the liquid absorption cylinder. Two metal rods are connected outside the cylindrical surface of the plunger. Bent heads are arranged on the two metal rods at ends distal to the plunger handle. A space between straight sections of the two metal rods is larger than the outer diameter of the positioning ring, and a space between bent sections of the two metal rods is smaller than the outer diameter of the positioning ring. According to the adjustable quantitative pipette provided by the invention, with reciprocating movements of the liquid absorption cylinder and the piston of the plunger, liquid fetching and discharging are realized. Piston movement positions are controlled by using the metal rods and the positioning ring, such that liquid quantitation is realized, and liquid absorption is fast. Quantitation operation is not time-consuming, and liquid discharge is also fast, such that the pipette is convenient to use.

Description

technical field [0001] The invention relates to a chemical analysis experiment equipment, in particular to a quantitative pipette. Background technique [0002] In the laboratories of industrial production, hospitals, scientific research departments and other units, when performing chemical analysis tests, various test solutions and reagents often need to be quickly quantitatively pipetted, which requires a convenient and fast quantitative and transfer liquid. appliance. [0003] The traditional pipetting device is a glass pipette, which is still used by everyone, but it absorbs the liquid relatively slowly, and when the quantitative operation is either too much or too little, it often needs to be repeated several times to quantify it. Relatively slow, so that the operation process takes a long time. There are also people who use a quantitative liquid adder, but that liquid adder is connected to a liquid storage bottle. In use, the liquid receiving container needs to be pl...

AI Technical Summary

Problems solved by technology

[0003] The traditional pipetting device is a glass pipette, which is still used by everyone, but it absorbs the liquid slowly, and it is either too much or too little during the quantitative operation. It often needs to be repeated several times to quantify it. Relatively slow, making the operation process time-consuming

There are also people who use a quantitative liquid adder, but that liquid adder is connected to a liquid storage bottle. In use, the liquid receiving container needs to be placed on the outlet of the liquid adder. For those that are not easy to move The liquid receiving container has to use another container for liquid transfer after receiving the liquid, which is easy to pollute and more time-consuming and troublesome

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