Liquid-stopping plug for liquid-transferring gun

Abstract

The invention provides a liquid-stopping plug for a liquid-transferring gun, which comprises a sleeve, a plurality of ridge-shaped baffles and an L-shaped outer edge, wherein the L-shaped outer edge extends outward from the bottom of the sleeve and is used for mounting the liquid-stopping plug in a sucker of the liquid-transferring gun and taking the liquid-stopping plug out of the sucker; vertex angles of the ridge-shaped baffles are 90-degree; the planes of the bottoms of the ridge-shaped baffles are parallel to the radial direction of the sleeve; two ends of the ridge-shaped baffles are respectively connected with inner walls of the sleeve and are used for stopping the liquid which is sucked back during the liquid taking process of the liquid-transferring gun; the ridge-shaped baffles are arranged in a ladder form along the axial direction of the sleeve; a clearance is formed between the projections of adjacent ridge-shaped baffles along the axial direction; the ridge-shaped baffles are arranged at intervals along the radial direction of the sleeve; and parts of projections of the adjacent ridge-shaped baffles along the radial direction are overlapped. The liquid-stopping plug for the liquid-transferring gun is capable of efficiently preventing the problem of the liquid-transferring gun that a main body of the liquid-transferring gun, a sealing ring and a piston are polluted by the liquid backflow caused by the over-speed deformation recovering of a spring, so as to ensure the precision and accuracy of the liquid-transferring gun.

Description

technical field [0001] The invention relates to a liquid stopper device, in particular to a liquid stopper for a pipette gun. Background technique [0002] When the pipette gun is in the process of taking liquid, when the liquid is sucked into the tip, because the spring on the piston trunk recovers too quickly, the liquid is sucked back to the trunk and corrodes the surface of the trunk, so that the trunk and the sealing ring cannot be completely sealed, resulting in leakage. gas. If the liquid is sucked back to the upper part of the trunk, as the trunk moves upward, the liquid will further corrode the sealing ring and piston, resulting in air leakage. During the use of the pipette gun, or because the spring recovers too quickly during the liquid extraction process, or the pipette is placed at an angle, the phenomenon of liquid backflow will occur, which will pollute the trunk, sealing ring and piston, resulting in the failure of the pipette gun. The precision and accurac...

AI Technical Summary

Problems solved by technology

[0002] When the pipette gun is in the process of taking liquid, when the liquid is sucked into the tip, because the spring on the piston trunk recovers too quickly, the liquid is sucked back to the trunk and corrodes the surface of the trunk, so that the trunk and the sealing ring cannot be completely sealed, resulting in leakage. gas

If the liquid is sucked back to the upper part of the trunk, as the trunk moves upward, the liquid will further corrode the sealing ring and piston, resulting in air leakage

During the use of the pipette gun, or because the spring recovers too quickly during the liquid extraction process, or the pipette is placed at an angle, the phenomenon of liquid backflow will occur, which will pollute the trunk, sealing ring and piston, resulting in the failure of the pipette gun. The precision and accuracy of the

[0003] At present, there are two main methods to prevent contamination of pipette guns. One is to design gun racks and tip boxes to standardize the use process. The liquid gun itself solves the pollution problem that may be caused by taking the liquid; the other is to modify the tip of the pipette, adding two bending sections to the tip, so that the sucked liquid is blocked in the tip by the bending section , but most of the gun heads are for one-time use, and the amount of consumables is large. Increasing the bending section will increase the difficulty of use, manufacture, and transportation.

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