Multi-dimensional gas chromatograph chromatographic column temperature control structure

Abstract

The utility model belongs to the technical field of chromatographic column temperature control, and particularly relates to a chromatographic column temperature control structure of a multidimensional gas chromatograph, which comprises an inner interlayer, a 13X molecular sieve chromatographic column arranged in the inner interlayer, a middle layer arranged at the bottom of the inner interlayer, and an outer interlayer arranged at the bottom of the middle layer. The heating rod is of an annular structure and is equivalent to a 13X molecular sieve chromatographic column in size, and the heating area can fully cover the 13X molecular sieve chromatographic column, so that the heating is uniform, the temperature control is more accurate, the heating efficiency is improved, the service life is prolonged, the temperature control structure is of a double-interlayer split structure and can be flexibly and freely disassembled, and the heating efficiency is improved. When a 13X molecular sieve chromatographic column, a heating rod or a thermometer is damaged, corresponding accessories can be conveniently and independently replaced, the whole set of accessories does not need to be replaced, and the device is economical, so that the device has the advantages of being ingenious in design, accurate in temperature control, convenient to replace, economical and the like, and can efficiently meet the use of a multi-dimensional gas chromatograph and the replacement work of the accessories.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic column temperature control, in particular to a chromatographic column temperature control structure of a multidimensional gas chromatograph. Background Art

[0002] Petrochemical products such as gasoline and naphtha contain complex matrices and require analysis of specific components. Multidimensional chromatography technology is a technology that uses several different selective chromatographic separation columns in parallel or in series to form a combined system when separating difficult-to-separate or complex compounds with similar boiling points, similar polarities, isomers, etc. Different chromatographic columns have different constant temperature requirements, and appropriate heating modules are required for heating and temperature control to achieve the best separation effect of the chromatographic column, so as to detect the most accurate sample components;

[0003] A 13X molecular sieve filling column is used in the gas chromatograph. When working, the temperature needs to be heated or cooled between 90 and 430°C, and the constant temperature needs to be switched between different temperatures. The traditionally used 13X molecular sieve filling column heating module has a structure of two parallel long strip heating rods embedded in the annular chromatographic column shell. The heating coverage area is small, and the chromatographic column shell is heated unevenly and easily damaged, causing the chromatograph to report an error and shut down. Moreover, the heating module and the chromatographic column are an integrated structure. Once the heating module is damaged, the chromatographic column needs to be replaced simultaneously. The replaced chromatographic column also needs to be qualitatively processed before it can be used, which greatly increases the cost of accessories and analysis time. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a temperature control structure for a chromatographic column of a multidimensional gas chromatograph, which solves the current problem of being unable to meet the needs of multidimensional gas chromatograph use and accessory replacement work.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multidimensional gas chromatograph column temperature control structure, comprising an inner interlayer, a 13X molecular sieve chromatographic column is arranged inside the inner interlayer, an intermediate layer is arranged at the bottom of the inner interlayer, an outer interlayer is arranged at the bottom of the intermediate layer, a thermometer is arranged in the middle of the outer interlayer, and a heating rod is arranged on the outer interlayer outside the thermometer.

[0006] As a preferred technical solution of the utility model, the inner interlayer, the middle layer and the outer interlayer are respectively composed of three layers of different metals which are overlapped and assembled in sequence into a whole and are arranged in a circular inner and outer double interlayer structure.

[0007] As a preferred technical solution of the utility model, the thermometer is installed at the center of the outer interlayer.

[0008] As a preferred technical solution of the utility model, the heating rod is a single ring structure, the heating rod is installed at the outwardly protruding part of the outer interlayer, and the size of the heating rod is compatible with the size of the 13X molecular sieve chromatographic column.

[0009] As a preferred technical solution of the present utility model, the resistance value of the heating rod is set to 15Ω, and the power of the heating rod is set to 110W.

[0010] As a preferred technical solution of the present utility model, the shell of the heating rod is made of red copper.

[0011] As a preferred technical solution of the utility model, four small circular holes are evenly distributed between the inner interlayer and the outer interlayer.

[0012] Compared with the prior art, the utility model provides a multi-dimensional gas chromatograph column temperature control structure, which has the following beneficial effects:

[0013] The temperature control structure of a chromatographic column of a multidimensional gas chromatograph has a ring-shaped heating rod, which is comparable in size to a 13X molecular sieve chromatographic column, and the heating area can fully cover the 13X molecular sieve chromatographic column, so that the heating is uniform, the temperature control is more precise, the heating efficiency is improved, and the service life is increased. The temperature control structure is arranged in a double-layer split structure, which can be flexibly and freely disassembled. When a 13X molecular sieve chromatographic column, a heating rod or a thermometer is damaged, it is convenient to replace the corresponding accessories separately, and there is no need to replace the whole set, which is economical. In summary, the utility model has the advantages of clever design, precise temperature control, convenient replacement, economical saving, etc., and can efficiently meet the use of a multidimensional gas chromatograph and the replacement of accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a top view of the inner interlayer of the utility model;

[0016] Figure 3 This is a bottom view of the inner interlayer of the utility model;

[0017] Figure 4 It is a top view of the outer interlayer of the utility model;

[0018] Figure 5 It is a bottom view of the outer interlayer of the utility model.

[0019] In the figure: 1, inner interlayer; 101, 13X molecular sieve chromatographic column; 2, middle layer; 3, outer interlayer; 301, thermometer; 302, heating rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 In this embodiment: a multidimensional gas chromatograph column temperature control structure comprises an inner interlayer 1, a 13X molecular sieve chromatographic column 101 is arranged inside the inner interlayer 1, an intermediate layer 2 is arranged at the bottom of the inner interlayer 1, an outer interlayer 3 is arranged at the bottom of the intermediate layer 2, a thermometer 301 is arranged in the middle of the outer interlayer 3, and a heating rod 302 is arranged on the outer periphery of the thermometer 301 in the outer interlayer 3.

[0022] In this embodiment, the inner interlayer 1, the middle layer 2 and the outer interlayer 3 are respectively composed of three layers of different metals which are overlapped and assembled into a whole and are arranged in a circular inner and outer double interlayer structure;

[0023] Specifically, the three-layer structure has a high degree of coordination, high thermal efficiency, and reduces heat loss, thereby providing stable temperature control accuracy for the chromatographic column, thereby creating better basic conditions for the separation of samples in chromatography;

[0024] In this embodiment, the thermometer 301 is installed at the center of the outer interlayer 3;

[0025] Specifically, by setting the thermometer 301, the overall temperature measurement accuracy is more accurate;

[0026] In this embodiment, the heating rod 302 is a single ring structure, and the heating rod 302 is installed at the outwardly protruding portion of the outer interlayer 3. The size of the heating rod 302 is compatible with the size of the 13X molecular sieve chromatographic column 101;

[0027] Specifically, the heated temperature can be evenly conducted and covered on another layer of the chromatographic column;

[0028] In this embodiment, the resistance value of the heating rod 302 is set to 15Ω, and the power of the heating rod 302 is set to 110W;

[0029] Specifically, the heating rod 302 can be used to increase the temperature by about 10°C per minute, achieving the heating rate required by the chromatographic column;

[0030] In this embodiment, the shell of the heating rod 302 is made of red copper;

[0031] Specifically, the red copper material makes the heating rod 302 have good thermal conductivity;

[0032] In this embodiment, four small circular holes are evenly distributed between the inner interlayer 1 and the outer interlayer 3;

[0033] Specifically, four sets of screw and nut assemblies are used for fixing when used for double sandwich assembly.

[0034] The working principle and use process of the utility model: the double-layer of the chromatographic column heating module is assembled by overlapping and matching three layers of different metal structures in sequence, and is locked and fixed with four sets of screws and nuts. One layer contains a 13X molecular sieve chromatographic column 101, and the other layer contains a heating module heating rod 302 and a temperature measuring thermometer 301. During normal use, the heating module heating rod 302 controls the different working temperatures required for the temperature control of the chromatographic column; when a fault occurs, such as the chromatographic column is deactivated and fails, the heating rod 302 is short-circuited and does not heat, and the thermometer 301 is open-circuited and the temperature measurement is inaccurate, it can be disassembled to find the cause of the fault and replace the corresponding accessories to prescribe the right remedy without replacing the entire set of accessories, thereby controlling the cost of accessories and achieving economic savings.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-dimensional gas chromatograph column temperature control structure, comprising an inner interlayer (1), characterized in that: A 13X molecular sieve chromatographic column (101) is arranged inside the inner interlayer (1), an intermediate layer (2) is arranged at the bottom of the inner interlayer (1), an outer interlayer (3) is arranged at the bottom of the intermediate layer (2), a thermometer (301) is arranged in the middle of the outer interlayer (3), and a heating rod (302) is arranged on the outer periphery of the thermometer (301) in the outer interlayer (3).

2. The multidimensional gas chromatograph column temperature control structure according to claim 1, characterized in that: The inner interlayer (1), the middle layer (2) and the outer interlayer (3) are respectively composed of three layers of different metals which are overlapped and matched in sequence to form a whole and are arranged in a circular inner and outer double interlayer structure.

3. The multidimensional gas chromatograph column temperature control structure according to claim 1, characterized in that: The thermometer (301) is installed at the center of the outer interlayer (3).

4. The multidimensional gas chromatograph column temperature control structure according to claim 1, characterized in that: The heating rod (302) is a single ring structure, and the heating rod (302) is installed at the outwardly protruding portion of the outer interlayer (3). The size of the heating rod (302) is compatible with the size of the 13X molecular sieve chromatographic column (101).

5. The multi-dimensional gas chromatograph column temperature control structure according to claim 1, characterized in that: The resistance value of the heating rod (302) is set to 15Ω, and the power of the heating rod (302) is set to 110W.

6. The multi-dimensional gas chromatograph column temperature control structure according to claim 1, characterized in that: The shell of the heating rod (302) is made of red copper.

7. The multi-dimensional gas chromatograph column temperature control structure according to claim 1, characterized in that: Four small circular holes are evenly distributed between the inner interlayer (1) and the outer interlayer (3).

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