Vortex type sampling needle washing device

Abstract

The invention discloses a vortex type sampling needle washing device which comprises a needle washing unit. The needle washing unit comprises a small-end-down conical cavity and a liquid outlet pipe, wherein the conical cavity is located on the upper portion, and the liquid outlet pipe is vertical and located on the lower portion. The upper end of the conical cavity is open, the inner surface of the conical cavity is a polished surface, and a liquid inlet for washing liquid penetrates through the side wall of the conical cavity; a horizontally-titling liquid inlet pipe is arranged outside the washing liquid inlet, and the tilting angle of the liquid inlet pipe is 30-60 degrees; the lower end of the conical cavity communicates with the liquid outlet pipe, and the axis of the conical cavity and the axis of the liquid outlet pipe are located on the same straight line. A spiral groove is formed in the inner wall of the liquid outlet pipe, and the depth of the groove is gradually increased from top to bottom in the spiral direction. The vortex type sampling needle washing device has the beneficial effects that when sampling needles are washed, washing force is large, the washing speed is high, the washing effect is good, and pollution is avoided; the effects can be further enhanced by changing parameters of the needle washing unit.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a vortex type sampling needle washing device. Background technique [0002] A hemorheometer is a medical device used to test blood viscosity. During the working process, the blood rheometer needs to use the sampling needle to sequentially sample the blood in the test tube, and the instrument needs to automatically clean the sampling needle for each sampling. [0003] At present, there are generally three cleaning methods for various sampling needles on the hemorheometer: air bubble type, spring type and scraping type. The three cleaning methods are all equipped with a washer, and the sampling needle passes through the washer. During cleaning, the sampling needle will also move up and down reciprocatingly under the control of the computer. The bubble type and the spring type have obvious disadvantages such as slow cleaning and unclean cleaning, and the spring type cleaning requi...

AI Technical Summary

Problems solved by technology

The bubble type and the spring type have obvious disadvantages such as slow cleaning and unclean cleaning, and the spring type cleaning requires more cleaning liquid; although the scraping type cleaning is fast, it has the disadvantage that there will be sample substances after cleaning for a period of time. Disadvantages of pollution caused by residues

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