A sample injection gun for preventing liquid back

Abstract

The invention discloses a sampling gun for preventing liquid return, relates to the technical field of sampling guns, and comprises a main body of the sampling gun, a non-return assembly, a tip assembly and a reinforcement assembly. One side of the main body of the sampling gun is provided with a Anti-slip pattern, and the piston press head is installed above the main body of the sampling gun, the non-return assembly is fixed below the main body of the sampling gun, and the non-return assembly includes a liquid inlet pipe, a non-return chamber, a flow channel, a mounting frame, A high-pressure air bag, bellows and a jacking baffle, a liquid inlet pipe is connected to the lower end of the main body of the sampling gun, and a non-return cavity is installed outside the main body of the sampling gun. The liquid-return prevention filling gun makes the high-pressure air bag and the bellows drive the upper lifting baffle to closely fit on the lower outside of the liquid inlet pipe through the check assembly, which can block the liquid inlet pipe and prevent liquid backflow. When adding samples, the micro suction cup with inclined structure can be closely attached to the inner wall of the container, which can avoid the occurrence of air bubbles during pipetting caused by hand shaking.

Description

A sampling gun that prevents liquid backflow technical field The present invention relates to the sample adding gun technical field, be specially a kind of sample adding gun that prevents liquid back. Background technique [0002] The sample gun is an indispensable tool for experimental operations. It is often used in the pipetting of small or trace amounts of liquids in the laboratory. Different sizes, different sizes of pipette tips are matched with different sizes of pipette tips, and the shapes produced by different manufacturers are slightly different. The same, but the working principle and operation method are basically the same. Existing sample adding gun is prone to the situation of liquid back when draining, thereby contaminating the liquid inside, and draining It is easy to cause bubbles to appear when the hand shakes during liquid. For this reason, we propose a sample gun that prevents liquid backflow. SUMMARY OF THE INVENTION For the deficiencies in t...

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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