CN212748826U - Temperature programming device for gas chromatograph - Google Patents
Temperature programming device for gas chromatograph Download PDFInfo
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- CN212748826U CN212748826U CN202021364407.XU CN202021364407U CN212748826U CN 212748826 U CN212748826 U CN 212748826U CN 202021364407 U CN202021364407 U CN 202021364407U CN 212748826 U CN212748826 U CN 212748826U
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Abstract
The utility model provides a gas chromatograph procedure heating device, the power distribution box comprises a box body, install radiator fan, chromatographic column, elevating system in the box, temperature sensor is installed to chromatographic column one side, and heater and heat-conducting plate are installed to the opposite side, elevating system includes the lifter, but installs the heat preservation lid of lock on the chromatographic column on the lifter. The temperature programming device of the gas chromatograph has the advantages of simple structure and small volume. Can quickly raise and lower the temperature and accurately control the working temperature of the chromatographic column.
Description
Technical Field
The utility model belongs to the gas chromatograph field especially relates to a gas chromatograph programming device.
Background
In the gas chromatographic analysis, whether the temperature is stable or not is directly closely related to the normal operation of the gas chromatograph and the reliability of the measurement result. The temperature control mode of the chromatographic column is divided into constant temperature and temperature programming. The programmed temperature chromatography means that the temperature of a chromatographic column is continuously and linearly or nonlinearly gradually increased along with time according to a program set by a component boiling range, so that the column temperature and the boiling point of the component are mutually corresponding, so that both low-boiling-point components and high-boiling-point components are properly retained in the chromatographic column, chromatographic peaks are uniformly distributed and symmetrical in peak shape, and the method has the advantages of improving separation, narrowing peaks, reducing detection limit, saving time and the like. Therefore, in the process of analyzing volatile organic compounds using a gas chromatograph, the analysis is often performed by a temperature programmed method.
The chromatographic column temperature programming module is a device for controlling the working temperature of the chromatographic column, has non-negligible effect on effectively improving the column effect, improving the separation degree of chromatographic peaks and the symmetry of peak shapes, shortening the retention time, reducing the column back pressure, reducing the abrasion of a pump and ensuring the accuracy and the repeatability of sample analysis results, and is an important matching device of a gas chromatograph. In the practical application process of the programmed heating module, it is found that the control precision of the cooling is more difficult to accurately realize compared with the heating process. In a gas chromatograph in a laboratory in the prior art, a ventilation opening mode with a mechanical switch is adopted as a cooling mode, so that the cooling is slow and the volume is large.
SUMMERY OF THE UTILITY MODEL
The utility model discloses adopt the vent cooling to current chromatographic column program heating module, speed is slow, and the technical problem that the precision is low provides one kind can rapid precision intensification and cooling, the operating temperature gas chromatograph program heating device of accurate control chromatographic column.
In order to achieve the above object, the utility model discloses a technical scheme be:
the utility model provides a gas chromatograph procedure heating device, includes the box, install radiator fan, chromatographic column, elevating system in the box, temperature sensor is installed to chromatographic column one side, and heater and heat-conducting plate are installed to the opposite side, elevating system includes the lifter, but installs the heat preservation lid of lock on the chromatographic column on the lifter.
Preferably, the heater is a ceramic heating plate.
Preferably, the heat radiation fan is installed on the bottom surface of the box body through a fan bracket, and a heat insulation column is arranged between the fan and the chromatographic column.
Preferably, the heat conducting plate is made of copper or aluminum.
Preferably, the inner side of the heat preservation cover is provided with a chromatographic column heat preservation layer.
Preferably, the insulating layer is provided with a groove for accommodating a chromatography column.
Preferably, the lifting rod is a lead screw, the lower end of the lead screw is connected with a lifting motor, a sliding block is installed on the lead screw, and the heat-insulating cover is fixed on the sliding block.
Preferably, a side fan is mounted on the side wall of the box body.
Preferably, the inner wall of the box body is provided with a box body heat insulation layer.
Preferably, the temperature control device further comprises a temperature controller, the temperature controller comprises a data communication module and a storage module, and the temperature sensor, the heater, the lifting mechanism and the cooling fan are electrically connected with the temperature controller.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. the temperature programming device of the gas chromatograph is provided with a bottom fan and a side fan, the fans in two directions work in a cooperative mode, a fan support and a heat insulation column are arranged, the bottom fan is enabled to have a sufficient heat dissipation space, and the temperature reduction speed is guaranteed.
2. The lifting mechanism flexibly controls the lifting of the heat-insulating cover in the process of heating and cooling, and the heat-insulating and cooling efficiency is improved. The chromatographic column is covered by the heat-insulating cover during temperature rising, so that the heat loss in the temperature rising process is reduced to the maximum extent, the temperature rising efficiency is improved, and the power consumption is reduced; when the temperature is reduced, the heat-insulating cover is separated from the chromatographic column by the lifting mechanism, and the heat is dissipated by the side fan and the bottom fan, so that the aim of rapid temperature reduction is fulfilled.
3. The temperature programming device of the gas chromatograph has the advantages of simple structure and small volume. The temperature can be rapidly and accurately raised and lowered, the working temperature of the chromatographic column can be accurately controlled, the column effect can be effectively improved, the separation degree of chromatographic peaks and the symmetry of peak shapes can be improved, the retention time can be shortened, and the accuracy of sample analysis results can be ensured.
Drawings
Fig. 1 is a schematic structural diagram of a temperature programming device of a gas chromatograph according to the present invention;
fig. 2 is an internal cross-sectional view of the temperature programming device of the gas chromatograph of the present invention;
in the above figures: 1. a box body; 11. a box body heat insulation layer; 12. an inlet of a chromatographic column; 13. an outlet of the chromatographic column; 14. heat dissipation holes; 2. a chromatographic column; 3. a side fan; 4. a bottom fan; 41. a fan bracket; 42. a heat insulating column; 5. a temperature controller; 6. a heat conducting plate; 7. a temperature sensor; 8. a heater; 9. a lifting mechanism; 91. a lead screw; 92. a lifting motor; 93. a slider; 94. a heat preservation cover; 941. chromatographic column heat insulating layer.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example (b):
as shown in fig. 1, a gas chromatograph program heating device, includes box 1, 1 inner wall of box is provided with box heat preservation 11, and ventilative material is chooseed for use to box heat preservation 11, like sponge, textile fabric etc. and 1 lateral wall of box is provided with chromatographic column entry 12 and chromatographic column export 13, still is provided with louvre 14 on the box 1. A relatively sealed space is formed in the box body 1, so that the influence of external environment temperature change on the internal chromatographic column can be reduced, and the adjustment and control of the working temperature of the internal chromatographic column are facilitated.
As shown in fig. 2, a heat dissipation fan, a chromatography column 2, a lifting mechanism 9, and a temperature controller 5 are installed in the case 1. Two heat radiation fans are arranged, one is a side fan 3 which is arranged on the side wall of the box body 1, and the side wall is provided with heat radiation holes 14; the other is a bottom fan 4, the bottom fan 4 is mounted on the bottom surface of the box body 1 through a fan bracket 41, and a heat insulation column 42 is mounted on the upper portion of the bottom fan 4. The side fans 3 and the bottom fan 4 are electrically connected with a temperature controller 5, and the operation of the fans can be controlled by the temperature controller 5. The heat conducting plate 6 is arranged above the heat insulating column 42, and the chromatographic column 2 is arranged on the heat conducting plate 6 and extends out of the box body 1 from the chromatographic column inlet 12 and the chromatographic column outlet 13. The heat conducting plate 6 is made of a metal material with good thermal conductivity, and the heat conducting plate 6 is made of copper or aluminum. In order to realize the rapid temperature rise of the chromatographic column 2, one side of the chromatographic column 2 is provided with a temperature sensor 7 for detecting the ambient temperature of the chromatographic column 2, the other side is provided with a heater 8, the heater 8 is in close contact with the heat conducting plate 6, the heater 8 adopts a ceramic heating plate, and of course, an electric heating wire and the like can also be adopted. The temperature sensor 7 and the heater 8 are both electrically connected with the temperature controller 5, the temperature sensor 7 transmits the temperature value around the chromatographic column 2 to the temperature controller 5, and the temperature controller 5 controls the operation condition of the heater 8 according to the difference value between the set temperature and the actual temperature.
The lifting mechanism 9 comprises a lifting rod, and a heat-insulating cover 94 which can be buckled on the chromatographic column 2 is arranged on the lifting rod. The heat preservation lid 94 inboard is provided with chromatographic column heat preservation 941, the heat preservation is provided with the recess that is used for holding chromatographic column 2. The lifting rod is a lead screw 91, the upper end of the lead screw 91 is connected with a lifting motor 92, and the lifting motor 92 is electrically connected with the temperature controller 5. The lead screw 91 is provided with a slide block 93 which can rise and fall along with the rotation of the lead screw, and the heat preservation cover 94 is fixed on the slide block 93. Of course, other lifting structures, such as cams, cylinders, etc., may be used.
The operation process of the gas chromatograph temperature programming device is as follows:
the gas to be measured enters the chromatographic column from the inlet 12 of the chromatographic column and is led out from the outlet 13 of the chromatographic column, and the temperature change is realized in the temperature programming device. The temperature controller 5 further comprises a data communication module and a storage module, the temperature storage module stores a temperature curve, the temperature rise and the temperature drop of the chromatographic column 2 are realized according to the temperature curve, and the data communication module can transmit information. When the temperature rises, the lifting mechanism 9 descends, and the heat-insulating cover 94 descends to the upper part of the chromatographic column 2 and is pressed tightly. The chromatographic column 2 is positioned in the groove of the heat-insulating cover 94 and is tightly attached to the heat-insulating layer in the heat-insulating cover 94, so that the temperature loss is reduced to the minimum. After that, the heater 8 starts heating, and the temperature sensor 7 detects the temperature in real time and transmits the temperature to the temperature controller 5, so as to realize rapid temperature rise. When the temperature rise value is set, the heater 8 stops operating. When cooling down, elevator motor 92 reversal, heat preservation lid 94 slowly rises along with the rotation of lead screw 91, and heat preservation lid 94 breaks away from chromatographic column 2 to keep a take the altitude, side fan 3 starts with bottom surface fan 4 simultaneously, thereby realizes that chromatographic column 2 is multi-direction dispels the heat simultaneously, accelerates cooling speed, realizes rapid cooling.
The gas chromatograph temperature programming device is provided with a bottom fan and a side fan 3, the fans in the two directions work cooperatively, and a fan bracket 41 and a heat insulation column 42 are arranged, so that the bottom fan 4 has a sufficient heat dissipation space, and the cooling speed is ensured; the lifting mechanism 9 flexibly controls the lifting of the heat preservation cover 94 in the process of temperature rising and temperature lowering, and the efficiency of heat preservation and temperature lowering is improved. The chromatographic column 2 is covered by the heat-insulating cover 94 during temperature rise, so that the heat loss in the temperature rise process is reduced to the maximum extent, the temperature rise efficiency is improved, and the power consumption is reduced; during the cooling, elevating system 9 will keep warm and cover and chromatographic column 2 breaks away from, dispel the heat through side fan 3 and bottom surface fan 4, realize rapid cooling's purpose.
The temperature programming device of the gas chromatograph has the advantages of simple structure and small volume. The temperature can be rapidly and accurately raised and lowered, the working temperature of the chromatographic column 2 can be accurately controlled, the column effect can be effectively improved, the separation degree of chromatographic peaks and the symmetry of peak shapes can be improved, the retention time can be shortened, and the accuracy of sample analysis results can be ensured.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a gas chromatograph procedure heating device, includes the box, its characterized in that: install radiator fan, chromatographic column, elevating system in the box, temperature sensor is installed to chromatographic column one side, and heater and heat-conducting plate are installed to the opposite side, elevating system includes the lifter, but installs the heat preservation lid of lock on the chromatographic column on the lifter.
2. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: the heater is a ceramic heating plate.
3. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: the heat radiation fan is installed on the bottom surface of the box body through the fan support, and a heat insulation column is arranged between the fan and the chromatographic column.
4. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: the heat conducting plate is made of copper or aluminum.
5. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: and a chromatographic column insulating layer is arranged on the inner side of the insulating cover.
6. The temperature-programmed apparatus for gas chromatograph according to claim 5, wherein: the heat preservation layer is provided with a groove for accommodating a chromatographic column.
7. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: the lifting rod is a lead screw, the lower end of the lead screw is connected with a lifting motor, a sliding block is installed on the lead screw, and the heat-insulating cover is fixed on the sliding block.
8. The temperature-programmed apparatus for gas chromatograph according to claim 3, wherein: and a side fan is arranged on the side wall of the box body.
9. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: and a box body heat-insulating layer is arranged on the inner wall of the box body.
10. The temperature-programmed apparatus for gas chromatograph according to claim 1, wherein: the temperature controller comprises a data communication module and a storage module, and the temperature sensor, the heater, the lifting mechanism and the cooling fan are electrically connected with the temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021364407.XU CN212748826U (en) | 2020-07-10 | 2020-07-10 | Temperature programming device for gas chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021364407.XU CN212748826U (en) | 2020-07-10 | 2020-07-10 | Temperature programming device for gas chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212748826U true CN212748826U (en) | 2021-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021364407.XU Active CN212748826U (en) | 2020-07-10 | 2020-07-10 | Temperature programming device for gas chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212748826U (en) |
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2020
- 2020-07-10 CN CN202021364407.XU patent/CN212748826U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266000 No. 1 Xueyue Road, Chengyang District, Qingdao City, Shandong Province Patentee after: Qingdao Zhongrui Intelligent Instrument Co.,Ltd. Address before: 266000 No. 1 Xueyue Road, Chengyang District, Qingdao City, Shandong Province Patentee before: QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |