Liquid return prevention sampling gun

Abstract

The invention discloses a liquid return prevention sampling gun, which relates to the technical field of sampling guns. The liquid return prevention sampling gun comprises a sampling gun main body, a non-return assembly and a gun head assembly, wherein the outside of one side of the sampling gun main body is provided with antiskid lines, a piston pressing head is installed above the sampling gun main body, the non-return assembly is fixed below the sampling gun main body, the non-return assembly comprises a liquid inlet pipe, a non-return cavity, a flow channel, a mounting frame, a high-pressure air bag, a corrugated pipe and a jacking spoiler, the liquid inlet pipe is connected to the lower end of the middle part of the sampling gun main body, and the non-return cavity is formed in the outer part of the lower part of the sampling gun main body. According to the liquid return prevention sampling gun, the high-pressure air bag and the corrugated pipe drive the jacking spoiler at the upper end to be tightly attached to the outer side of the lower portion of the liquid inlet pipe through the non-return assembly, the liquid inlet pipe can be blocked, the situation of liquid return is prevented, and the micro suction cup of an inclined structure can be tightly attached to the inner wall of a container during sample adding; and the condition that bubbles appear during pipetting due to hand shaking can be avoided.

Description

technical field [0001] The invention relates to the technical field of sampling guns, in particular to a sampling gun for preventing liquid back. Background technique [0002] The sampling gun is an indispensable tool for experimental operation. It is often used to pipette a small amount or a small amount of liquid in the laboratory. The specifications are different. Pipette guns of different specifications are equipped with different sizes of tips. The shapes of different manufacturers are also slightly different, but the working principle and operation method are basically the same. [0003] Existing sample guns are prone to liquid return during liquid discharge, thereby contaminating the internal liquid, and hand shaking is prone to cause air bubbles during liquid discharge. Therefore, we propose a method to prevent liquid return Sample gun. Contents of the invention [0004] Aiming at the deficiencies of the prior art, the present invention provides a sample gun that...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a sample gun that prevents liquid return, which solves the problem that the existing sample gun proposed in the above background technology is prone to liquid return during liquid discharge, thereby polluting the interior liquid, and it is easy to shake the hand when discharging the liquid, which leads to the problem of air bubbles

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