Chromatographic packed column heating constant temperature device

Abstract

The utility model provides a heating constant-temperature device for a chromatographic packed column, which comprises a heating block, a heating rod, a constant-temperature heating device and a constant-temperature heating device, the outer surface of the heating block is provided with a spiral groove, the chromatographic packed column is tightly wound on the heating block along the groove, and the heating block is provided with the heating rod; the heating sleeve is arranged on the heating block in a sleeving manner, so that the chromatographic packed column is positioned in the heating sleeve, and a heating rod is also mounted on the heating sleeve; the temperature sensor is arranged in the column oven and is used for monitoring the temperature in the column oven; the temperature controller is connected with the temperature sensor, the temperature controller is further connected with the heating block and the heating rod on the heating sleeve, and the temperature controller controls the heating temperature of the heating rod according to temperature information monitored by the temperature sensor. According to the device, the chromatographic packed column is wound in the spiral groove in the heating block, and meanwhile, the chromatographic packed column is sleeved with the heating sleeve, so that the chromatographic packed column is quick in temperature rise, uniform in temperature control and accurate in temperature control.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatograph detection, in particular to a chromatographic filling column heating and constant temperature device. Background Art

[0002] A chromatograph is a device used for chromatographic separation and analysis. Its separation principle is based on the difference in the interactions between the components of a mixture in two immiscible phases (stationary phase and mobile phase). It has the characteristics of stability, sensitivity, versatility and high degree of automation, and is widely used in the field of VOCs detection.

[0003] The chromatograph includes an injection system, a chromatographic filling column, a temperature control system, a detection system, and a data processing system. The chromatographic filling column is the core component of the chromatographic instrument and has a separate heating and thermostat. Both the chromatographic filling column and its heating and thermostat are located in the column oven. The temperature of the chromatographic filling column is controlled by the heating and thermostat to meet the needs of separation. The temperature stability of the chromatographic filling column is one of the main factors affecting the separation effect of the chromatographic filling column. Therefore, the temperature stability of the chromatographic filling column is required to be high.

[0004] However, the heating and constant temperature device in the existing column oven is usually a heating wire or a heating plate, which provides a heat source for the space inside the column oven through the heating wire or the heating plate, and heats the column oven to the required temperature, thereby controlling the temperature of the chromatographic filling column. In other words, the chromatographic filling column is preheated by air conduction. This structural design makes the chromatographic filling column heat up slowly and the temperature control is uneven, resulting in poor separation effect and affecting the detection results of the chromatograph. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a chromatographic filling column heating and constant temperature device. In the device, the chromatographic filling column is wound in a spiral groove on a heating block, and a heating jacket is put on the outside of the chromatographic filling column. The chromatographic filling column heats up quickly, the temperature is controlled evenly and accurately.

[0006] The technical solutions adopted to achieve the above-mentioned purpose of the utility model are:

[0007] A chromatographic filling column heating and constant temperature device is located in a column oven and controls the temperature of the chromatographic filling column. The chromatographic filling column heating and constant temperature device comprises:

[0008] The heating block is cylindrical in shape and has spiral grooves on its outer surface. The chromatographic column is tightly wound around the heating block along the grooves. The heating block is equipped with one or more heating rods to provide heat for the heating block.

[0009] The heating jacket is cylindrical in shape and is placed on the heating block so that the chromatographic column is located inside the heating jacket. The heating jacket is also equipped with one or more heating rods for providing heat to the heating jacket.

[0010] a temperature sensor, which is installed in the column oven and monitors the temperature in the column oven;

[0011] The thermostat is connected to the temperature sensor, and the thermostat is also connected to the heating block and the heating rod on the heating sleeve. The thermostat controls the heating temperature of the heating rod according to the temperature information monitored by the temperature sensor.

[0012] A temperature switch is connected between the temperature controller and the heating rod. The temperature switch is installed on the heating block. When the temperature on the heating block exceeds the set value of the temperature switch, the temperature switch is automatically disconnected and the heating rod stops heating.

[0013] A heating rod is installed on the heating block, and the heating rod is installed into the heating block from the center position of the end surface of the heating block.

[0014] The temperature sensor is mounted on the heating block and monitors the temperature of the heating block.

[0015] Two heating rods are installed on the heating sleeve. The two heating rods are both installed into the heating sleeve from the same end surface of the heating sleeve, and the two heating rods are symmetrically distributed.

[0016] The depth of the groove on the heating block matches the outer diameter of the chromatographic filling column, so that when the chromatographic filling column is wound on the heating block, the chromatographic filling column is flush with the outer surface of the heating block.

[0017] The heating rods on the heating block and the heating jacket are located at the same end. The end face of the heating jacket close to the heating rod is an open structure, and the end face of the heating jacket away from the heating rod is a closed structure provided with an end cap, and the end cap is provided with a hole for the chromatographic filling column to pass through.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following advantages: (1) In the chromatographic filling column heating and constant temperature device provided by the present invention, the chromatographic filling column is wound around the heating block, and a heating jacket is put on the outside of the chromatographic filling column. The chromatographic filling column heats up quickly and the temperature is controlled evenly. The heating of the heating rod is controlled by a temperature controller to ensure accurate temperature control of the chromatographic filling column.

[0019] (2) In the present invention, the outer surface of the heating block is provided with a spiral groove, and the chromatographic filling column is tightly wound around the heating block along the groove, ensuring that the chromatographic filling column and the heating block are tightly fitted, giving full play to the role of the heating block in energy storage and heat conduction, and reducing loss.

[0020] (3) In the present invention, the temperature sensor is installed on the heating block to monitor the temperature of the heating block. The heating block is in close contact with the chromatographic filling column, which can ensure that the monitored temperature is closest to the temperature of the chromatographic filling column, thereby improving the accuracy of temperature control.

[0021] (4) In the present invention, by connecting a temperature switch between the temperature controller and the heating rod and installing the temperature switch on the heating block, it is possible to prevent the chromatographic filling column from being damaged due to overheating when the heating rod or the temperature sensor is damaged and out of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the connection of the heating and constant temperature device for the chromatographic packed column in the present invention;

[0023] Figure 2 This is a schematic diagram of the exploded structure of the heating and constant temperature device for the chromatographic filling column in the present invention;

[0024] In the figure: 1- heating block, 101- groove, 2- heating jacket, 3- temperature sensor, 4- temperature controller, 5- heating rod, 6- temperature switch, 7- chromatographic filling column. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The structure of the chromatographic filling column heating constant temperature device provided by the utility model is as follows Figure 1 and Figure 2 As shown, the chromatographic filling column heating and constant temperature device is located in the column oven of the chromatograph as a whole and controls the temperature of the chromatographic filling column 7.

[0027] In this embodiment, the chromatographic column heating and constant temperature device includes a heating block 1, a heating jacket 2, a temperature sensor 3, and a temperature controller 4, which are connected as follows: Figure 1 shown.

[0028] In this embodiment, the heating block is cylindrical in shape as a whole, and a spiral groove 101 is provided on the outer surface of the heating block. Figure 2 The chromatographic filling column is tightly wound around the heating block along the groove, ensuring that the chromatographic filling column fits tightly with the heating block, giving full play to the role of the heating block in energy storage and heat conduction, reducing losses, and the chromatographic filling column heats up quickly and has uniform temperature control; specifically, the depth of the groove on the heating block matches the outer diameter of the chromatographic filling column, so that when the chromatographic filling column is wound around the heating block, the chromatographic filling column is flush with the outer surface of the heating block, further ensuring uniform temperature control of the chromatographic filling column. A heating rod 5 is installed on the heating block to provide heat for the heating block. Specifically, the heating rod is installed into the heating block from the center of the end face of the heating block to ensure that the heat of the heating rod is evenly transferred to the heating block.

[0029] In this embodiment, the heating jacket is cylindrical in shape and fits over the heating block, positioning the chromatographic column within the jacket. Two heating rods are mounted on the jacket to provide heat to the jacket, ensuring uniform heating of the entire column. Specifically, the two heating rods are inserted into the jacket from the same end face and are symmetrically positioned to ensure uniform heating of the jacket.

[0030] The temperature sensor is installed in the column oven and monitors the temperature inside the column oven. Since the heating block fits tightly against the chromatographic filling column, the temperature of the chromatographic filling column is closest to the temperature of the heating block. Therefore, in this embodiment, the temperature sensor is installed on the heating block and monitors the temperature of the heating block. At this time, the monitored temperature is closest to the temperature of the chromatographic filling column, thereby improving the accuracy of temperature control.

[0031] The thermostat is connected to a temperature sensor, which monitors the real-time temperature of the heating block and provides feedback to the thermostat. The thermostat is also connected to the heating block and the heating rods on the heating jacket. Based on the temperature information monitored by the temperature sensor, the thermostat controls the heating rods' temperature, thereby precisely controlling the temperature of the heating block. Heat from the heating block is quickly and evenly transferred to the chromatographic column, achieving uniform heating and gradual separation of the test substance within the chromatographic column. Specifically, the thermostat is equipped with a power module for powering the test.

[0032] In this embodiment, a temperature switch 5 is connected between the temperature controller and the heating rod. The temperature switch is mounted on the heating block. When the heating rod or temperature sensor is out of control and the temperature on the heating block exceeds the set value of the temperature switch, the temperature switch automatically disconnects and the heating rod stops heating. This prevents damage to the chromatographic column due to overheating caused by damage to the heating rod or temperature sensor.

[0033] In actual settings, the temperature sensor, temperature switch, and heating rod are all located at the same end. The end face of the heating jacket close to the heating rod is an open structure, and the end face of the heating jacket away from the heating rod is a closed structure with an end cap. The end cap is provided with holes for the two ends of the chromatographic filling column to pass through. The heating block wrapped with the chromatographic filling column is placed into the heating jacket from one open end, and the two ends of the chromatographic filling column are passed through the holes at the other end. The installation of each component is simple and convenient.

Claims

1. A chromatographic column heating and thermostatting device, which is located in a column oven and controls the temperature of the chromatographic column, characterized in that: The chromatographic filling column heating constant temperature device comprises: The heating block is cylindrical in shape and has spiral grooves on its outer surface. The chromatographic column is tightly wound around the heating block along the grooves. The heating block is equipped with one or more heating rods to provide heat for the heating block. The heating jacket is cylindrical in shape and is placed on the heating block so that the chromatographic column is located inside the heating jacket. The heating jacket is also equipped with one or more heating rods for providing heat to the heating jacket. a temperature sensor, which is installed in the column oven and monitors the temperature in the column oven; The thermostat is connected to the temperature sensor, and the thermostat is also connected to the heating block and the heating rod on the heating sleeve. The thermostat controls the heating temperature of the heating rod according to the temperature information monitored by the temperature sensor.

2. The chromatographic packed column heating constant temperature device according to claim 1, characterized in that: A temperature switch is connected between the temperature controller and the heating rod. The temperature switch is installed on the heating block. When the temperature on the heating block exceeds the set value of the temperature switch, the temperature switch is automatically disconnected and the heating rod stops heating.

3. The chromatographic packed column heating constant temperature device according to claim 1, characterized in that: A heating rod is installed on the heating block, and the heating rod is installed into the heating block from the center position of the end surface of the heating block.

4. The chromatographic packed column heating constant temperature device according to claim 1, characterized in that: The temperature sensor is mounted on the heating block and monitors the temperature of the heating block.

5. The chromatographic packed column heating constant temperature device according to claim 1, characterized in that: Two heating rods are installed on the heating sleeve. The two heating rods are both installed into the heating sleeve from the same end surface of the heating sleeve, and the two heating rods are symmetrically distributed.

6. The chromatographic packed column heating constant temperature device according to claim 1, characterized in that: The depth of the groove on the heating block matches the outer diameter of the chromatographic filling column, so that when the chromatographic filling column is wound on the heating block, the chromatographic filling column is flush with the outer surface of the heating block.

7. The chromatographic packed column heating and constant temperature device according to claim 1, characterized in that: The heating rods on the heating block and the heating jacket are located at the same end. The end face of the heating jacket close to the heating rod is an open structure, and the end face of the heating jacket away from the heating rod is a closed structure provided with an end cap, and the end cap is provided with a hole for the chromatographic filling column to pass through.

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