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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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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

Headspace sampler is a convenient and quick sample pretreatment method in gas chromatography. The automatic headspace sampler can realize automatic operation, continuous analysis, unattended, and maximize work efficiency. The invention discloses a mechanism and a control method of a fully automatic headspace sampler. Including actuators, drives, temperature control devices, and industrial computers (IPC). The actuator consists of two sets of precision rotary positioning mechanisms A and B fixed on the workbench, in which the sample plate is fixed on A, the heating plate is fixed on B, and A and B are respectively driven by two stepping motors. The IPC interprets the analysis method called by the user into the control logic of the actuator, and controls the two stepper motors to generate relative motion to achieve the alignment of the hole positions of the sample tray and the heating tray, ensuring that the headspace bottles enter the heating tray according to the determined timing. Since the heating module and temperature sensor are installed on the heating plate, in order to solve the problem of wire winding during the rotating motion of the heating plate, a signal transmission device composed of copper ring and beryllium copper sheet is designed to realize the structural decoupling of the rotating mechanism and the temperature control device.

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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