Autosampler

Abstract

The invention discloses an autosampler at least including a three-dimensional motion system, the three-dimensional motion system includes an X axis motion mechanism, a Y axis motion mechanism and a Z axis motion mechanism, the X axis motion mechanism at least includes a fixing frame, a screw rod, a needle frame seat and an elastic adjusting structure, the fixing frame is formed by connecting in a surrounding mode two bases arranged along the vertical direction with two shafts arranged along the horizontal direction, the screw rod is arranged along the horizontal direction between the two shafts, both ends of the screw rod are respectively connected to the two bases; the needle frame seat cooperates with screw rod thread in a transmission mode through a nut arranged in the needle frame seat, two sides of the bottom of the needle frame seat extend outwards to form a protruding part, the protruding part is contacted with the two shafts, the elastic adjusting structure fixedly arranged on the inside wall of the needle frame seat protrudes and extends to one of the two shafts, and the protruding end of the elastic adjusting structure resists against the surface of one of the two shafts. The autosampler can avoid waggling of the needle frame seat and has the advantages of stable operation and high positioning accuracy.

Description

technical field [0001] The invention relates to an automatic sample injector, in particular to a three-dimensional motion system of the automatic sample injector, belonging to the technical field of measurement and testing. Background technique [0002] As the liquid phase system is more and more widely used in the fields of biology, chemistry, medicine, petroleum, etc., the sample injector, as the main equipment for sampling the liquid phase system, is more and more popular. At present, the existing injectors can be divided into manual injectors and automatic injectors. Automatic injectors have gradually replaced manual injectors with the advantages of large injection volume, fast injection speed, and high injection accuracy. . However, there are many kinds of movement forms in the movement system of the automatic sampler, most of which adopt the structure of the transmission parts and the guide rails to realize the three-dimensional movement (that is, the three-axis movem...

AI Technical Summary

Problems solved by technology

Some guide rails use ball guide rails, and some use linear guide rails, etc., but no matter what kind of guide rails are used, there will be vibration between the guide rail and the slider in the horizontal movement direction due to the installation gap, resulting in the positioning accuracy of the autosampler. to the requirements, affecting the accuracy of sampling

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