Backflow-preventing detachable sucker type liquid sucking device

Abstract

The invention relates to a backflow-preventing detachable sucker type liquid sucking device which comprises an outer shell and a liquid sucking gun arranged on the outer shell in a penetrating way. The liquid sucking gun comprises a sucking pipe, a gun head boosting device, a sucker and a rubber pipe, wherein the sucking pipe is sleeved by the gun head boosting device, the sucker is connected with one end of the sucking pipe, and the rubber pipe is connected with the other end of the sucking pipe; a backflow preventing device is arranged on a port of one end connected with the sucker of the sucking pipe, the backflow preventing device is in a circular truncated cone shape, an upper opening and a lower opening are formed in the two ends of the backflow preventing device, the upper opening and the lower opening are in cut-through, and the diameter of the upper opening is larger than that of the lower opening; two cut-through grooves are formed in a lateral wall of the outer shell, the sucking pipe is connected with the outer shell, a pair of push blocks and a pair of abutting blocks are arranged on the outer surface of a sucker booster, and the push blocks are arranged on the cut-through grooves in a penetrating mode and can slide in the cut-through grooves; springs are arranged between the abutting blocks and the outer shell, one end of each spring abuts against the corresponding abutting block, and the other end of each spring abuts against the outer shell. The backflow-preventing detachable sucker type liquid sucking device disclosed by the invention has simple structure and convenience in operation, can effectively prevent residual liquid from flowing back, improves operation efficiency and further reduces experimental pollution.

Description

technical field [0001] The invention relates to the field of experimental consumables and instruments, in particular to an anti-backflow detachable suction head type liquid suction device. Background technique [0002] At present, when the laboratory absorbs waste liquid, most of the suction pipes are non-self-dismounting tips, which often require two hands to assist the operation at the same time, and are placed outside the ultra-clean workbench, so that the operator will inevitably communicate with the outside world during the experiment. Contact will cause experimental contamination; and often there will be a small amount of liquid remaining in the straw. When the liquid suction device absorbs the liquid, the liquid remaining on the tube wall will flow out from the straw again, which is easy to cause pollution. Contents of the invention [0003] The object of the present invention is to provide an anti-backflow detachable suction head type liquid suction device for the ...

AI Technical Summary

Problems solved by technology

[0002] At present, when the laboratory absorbs waste liquid, most of the suction pipes are non-self-dismounting tips, which often require two hands to assist the operation at the same time, and are placed outside the ultra-clean workbench, so that the operator will inevitably communicate with the outside world during the experiment. Contact, causing experimental contamination; and often there will be a small amount of liquid remaining in the straw, when the liquid suction device absorbs the liquid, the liquid remaining on the tube wall will flow out from the straw, which is easy to cause pollution

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