Pipette capable of quantitatively sucking liquid

Abstract

The invention relates to the field of chemical experiment devices and particularly relates to a pipette capable of quantitatively sucking liquid. The pipette comprises a pipette main body, a piston, a quantifying device, a tension inductor and an input terminal, wherein the piston is mounted in the pipette main body in a sliding manner; the quantifying device comprises a cavity, the cavity is produced from a rubber material, is mutually communicated with a duct and is communicated with the end part, far from a pipette hole, of the pipette main body through the duct; a motor, a rotating shaft, a chain and a first controller are arranged in the cavity; the first controller and the motor are fixedly arranged on the duct, the first controller is connected to the motor and the input terminal, respectively, and a counting module is connected with the first controller is arranged on the first controller; the motor is connected with the rotating shaft; one end of the chain winds the rotating shaft, the other end of the chain stretches into the pipette main body and is connected with the piston through the tension inductor; the tension inductor is connected with the first controller. The pipette has an accurate quantitative titration function and is convenient and rapid to use.

Description

Technical field [0001] The invention relates to the field of chemical experiment equipment materials, in particular to a pipette for quantitative liquid suction. Background technique [0002] The pipette is a measuring device that is only used to measure the volume of the solution it releases. It is a slender glass tube with an enlarged part in the middle. The lower end is sharp-mouthed, and a marking line is engraved on the neck of the upper end, which is a mark of the exact volume to be removed. When it is required to accurately pipette a certain volume of solution, pipettes of various capacities can be used. Commonly used pipettes are 10mL, 25mL and 50mL. At a certain temperature, the volume between the marking line of the pipette and the outlet at the lower end is constant. Generally, the method of using a pipette is as follows: (1) Wash the pipette with lotion, tap water, and distilled water in sequence: then wash the pipette with a liquid sample three times. (2) When p...

AI Technical Summary

Problems solved by technology

[0003] The above operation has the following disadvantages: 1. During the suction process of the pipette, if the amount of liquid absorbed by the pipette exceeds or is less than the required amount, it is necessary to perform the liquid absorption again. workload

Moreover, the operator must concentrate on using the pipette according to the above steps to achieve the effect of quantitative titration

2. The use of the pipette requires two hands to operate together, causing inconvenience to people

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