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Connector for connecting capillary column with ceramic tube in individual hydrocarbon test system

A test system, ceramic tube technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of microporous ceramic tube damage, complicated connection operation, deviation of test results, etc., to achieve improved accuracy, low permeability, and production low cost effect

Inactive Publication Date: 2011-01-19
LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the widely used connection method is the connection between the metal pressure ring and the graphite gasket, and the interface between the capillary column and the ceramic reaction tube is located in the column box. Due to the different thermal expansion coefficients between different materials, frequent periodic temperature changes are very easy. The graphite pad is loosened to cause different degrees of leakage, which leads to deviations in the test results. In addition, the traditional connection operation is more complicated, and it is easy to cause damage to the microporous ceramic tube. Therefore, how to develop a non-leakage And the interface that is convenient to connect is very important for more accurate testing of hydrocarbon isotopes of monomer hydrocarbons

Method used

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  • Connector for connecting capillary column with ceramic tube in individual hydrocarbon test system
  • Connector for connecting capillary column with ceramic tube in individual hydrocarbon test system
  • Connector for connecting capillary column with ceramic tube in individual hydrocarbon test system

Examples

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Effect test

Embodiment 1

[0023] An interface connecting a capillary column and a ceramic tube in a monomer hydrocarbon testing system, the interface includes a body 1, the body 1 is arranged on a reaction tube 2 that runs through a high-temperature thermal reaction furnace 6, and the input end of the reaction tube 2 The body 1 and the output end are respectively socketed with the capillary column 3 through the body 1; The cavity body 102, the first cavity body 101 and the second cavity body 102 are connected through each other.

[0024] The main body 1 adopts a cylindrical structure with a circular cross section, the diameter of the circular cross section is 10 mm, and the length of the main body 1 is 20 mm. The body 1 is made of silica gel, which is high temperature resistant silica gel with good elasticity. This kind of silica gel has good sealing performance, high elongation rate, high temperature resistance, good aging resistance, low loss, and has the advantages of translucence and easy operatio...

Embodiment 2

[0026] As a further technical improvement on the interface between the capillary column and the ceramic tube in the monomer hydrocarbon testing system described in Example 1, the body 1 can also be a columnar structure with an equilateral triangle in cross section, the equilateral triangle The diameter of the cross section is 12 mm and the length of the body 1 is 25 mm.

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Abstract

The invention relates to a connector for connecting a capillary column with a ceramic tube, in particular to a connector which is arranged in an individual hydrocarbon carbon / hydrogen isotope test system and used for connecting a quartz capillary column with a ceramic reaction tube. The connector is implemented directly through high temperature silica gels, and has the advantages of good tightness, high elongation rate, good aging resistance, low loss, translucence, easy operation, and the like. The maximum operating temperature of the sealing connector can reach 300 DEG C, therefore, the accuracy of the connector as an important system component for testing values can be improved effectively; meanwhile, the connector has the characteristics of low cost, long service time, and good application and generalization values; and the invention is simple in structure and easy to replace, and reduces the overall investment funds in the process of operating the equipment.

Description

technical field [0001] The invention relates to an important accessory in a monomer hydrocarbon hydrocarbon isotope testing system, in particular to an interface connecting a gas chromatography capillary column and a microporous ceramic tube. Background technique [0002] The carbon-hydrogen isotope ratio of monomer hydrocarbons plays an important role in the research of earth science, ecology, environmental science and so on. The hydrocarbon isotope test system for monomer hydrocarbons mainly consists of three parts: gas chromatography (GC), oxidation reaction device or high temperature thermal conversion device (C / TC) and isotope ratio mass spectrometry (IRMS). The system is referred to as GC-C / TC- IRMS. Among them, gas chromatography is mainly used to separate hydrocarbon mixtures into unimolecular compounds, and its core part is a capillary column; the core part of the oxidation reaction device or high-temperature pyrolysis device is a microporous aluminum oxide ceramic...

Claims

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Application Information

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IPC IPC(8): G01N30/60
Inventor 李中平李立武杜丽陶明信王作栋曹春晖
Owner LANZHOU CENT FOR OIL & GAS RESOURCES INST OF GEOLOGY & GEOPHYSICS CAS
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