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Full-automatic headspace sample injector mechanism and control method

A headspace sampler and control method technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of increasing system cost and high price of automatic headspace sampler products.

Pending Publication Date: 2018-03-06
北京中兴嘉乘仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will undoubtedly increase the cost of the system, resulting in expensive products for automatic headspace samplers

Method used

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  • Full-automatic headspace sample injector mechanism and control method
  • Full-automatic headspace sample injector mechanism and control method
  • Full-automatic headspace sample injector mechanism and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] 1. Executive body

[0025] (1), the precision rotary positioning mechanism A comprises a stepper motor, a driver, a reducer, a sample tray holder, and a sample tray that can place 36 headspace vials. The selection of the stepper motor, driver, and reducer is shown in Table 1, and the sample tray bracket and sample tray are self-made.

[0026] Table 1

[0027]

[0028] (2), the precision rotary positioning mechanism B comprises a stepper motor, a reducer, a balance box bracket, and a balance box that can place 9 headspace bottles. Among them, the selection of stepper motor, driver, and reducer is shown in Table 2. The balance box bracket and the balance box are self-made.

[0029] Table 2

[0030]

[0031] (3) The relative position of precision rotary positioning mechanism A and B should be able to achieve the alignment of the balance box hole and the sample plate hole, to ensure that the headspace bottle can accurately fall into the balance box according to th...

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PUM

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Abstract

A headspace sample injector is a convenient and quick sample preparation method in a gas chromatographic method. A full-automatic headspace sample injector can realize automatic operation, continuousanalysis and unattended operation, and the work efficiency is developed to the maximum extent. The invention discloses a full-automatic headspace sample injector mechanism and a control method. The full-automatic headspace sample injector mechanism comprises an actuating mechanism, a driving device, a temperature control device and an industrial personal computer (IPC). The actuating mechanism consists of two groups of precise rotating and positioning mechanisms A and B fixed on a workbench, wherein a sample disc is fixed on the A, a heating disc is fixed on the B, and the A and B are driven by two stepper motors respectively. The IPC is used for explaining an analytical method called by a user into a control logic of the actuating mechanism and controlling the two stepper motors to generate relative movement so as to realize aligning of sample disc hole sites and heating disc hole sites and guarantee that headspace bottles enter into the heating disc according to a determined timing sequence. Due to the fact that a heating module and a temperature sensor are mounted on the heating disc, a signal transmission device consisting of a copper ring and a beryllium copper plate is designed in order to solve a lead winding problem in the rotating movement process of the heating disc, and the structural decoupling of the rotating mechanism and the temperature control device is realized.

Description

technical field [0001] The invention belongs to the field of instruments and meters, in particular to an automatic headspace sampler mechanism and control method. Background technique [0002] Headspace analysis technology is a convenient and quick sample pretreatment method in gas chromatography. Its principle is to put the sample to be tested in a closed container, and heat up the temperature to make the volatile components volatilize from the sample matrix. The gas-liquid (or gas-solid) two phases reach equilibrium, and the top gas is directly extracted for chromatographic analysis, so as to test the composition and content of the volatile components in the sample. [0003] The detection process of headspace analysis technology is: a certain amount of sample (solid or liquid) is put into the headspace sample bottle and sealed, and the sample bottle reaches the phase equilibrium (gas-liquid equilibrium) at a certain temperature in the balance furnace of the headspace sampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/24G01N30/30
Inventor 不公告发明人
Owner 北京中兴嘉乘仪器有限公司
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