Sealing ring special for piston of injector of pipe-free liquid dropping machine

Abstract

The invention discloses a sealing ring special for a piston of an injector of a pipe-free liquid dropping machine. The sealing ring comprises an outer sealing ring body in interference sealing contact with the inner wall of a cylinder of the injector and an inner sealing ring body in interference sealing contact with an installation groove of the piston of the injector. The inner sealing ring body is in an O shape. An arc-shaped groove is formed in one side face, back to the inner wall of the cylinder of the injector, of the outer sealing ring body. The part of the inner sealing ring body is embedded in the arc-shaped groove and is interference sealing contact with the arc-shaped groove. By the adoption of the sealing ring special for the piston of the injector of the pipe-free liquid dropping machine, friction force and start force in the moving process of the piston of the injector are reduced, the crawling phenomenon is eliminated, and the sealing ring is resistant to a medium and small in deformation in the moving process.

Description

technical field [0001] The invention relates to a sealing ring, in particular to a special sealing ring for a syringe piston of a pipeless drip machine. Background technique [0002] As a relatively advanced dye automatic color matching system, the pipeless drip system is widely used in the production and scientific research fields related to dye color matching, such as printing and dyeing enterprises, university laboratories and laboratories. With the improvement of the technical level, the pipeless liquid drip system has completely replaced the traditional manual liquid suction operation method, and the color matching operation process is completely controlled by the computer, which not only reduces the labor intensity of the workers, but also improves the liquid preparation. accuracy and efficiency. [0003] The traditional pipeless drip machine syringe piston is sealed with a U-shaped sealing ring or only an O-shaped sealing ring, such as figure 1 and figure 2 As sho...

AI Technical Summary

Problems solved by technology

On the one hand, due to the self-sealing principle of the U-shaped sealing ring and the O-shaped sealing ring, the friction force and starting force are relatively large during the movement process, which is prone to crawling, which is not conducive to the stable control of the liquid distribution actuator, so that the distribution On the other hand, the U-shaped sealing ring and O-shaped sealing ring will produce large elastic deformation during the operation of the syringe piston, and this deformation will slowly recover when the syringe piston is stationary, and the recovery of the deformation of the sealing ring It will cause the corresponding displacement of the syringe piston, which will affect the injection volume of the dye liquid and affect the accuracy of dosing

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