Temperature control device for gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatographs, and discloses a temperature control device for a gas chromatograph, the temperature control device comprises a box body, the inner bottom wall of the box body is fixedly connected with two stand columns, and the top ends of the two stand columns are provided with a fixing assembly. According to the temperature control device for the gas chromatograph, through the design of the fixing assembly comprising the center ring, the sleeve, the extension block and the contact plate, the distance between the contact plate and the center ring can be flexibly adjusted, so that the temperature control device adapts to capillary chromatographic column coils with different diameters, the overall flexibility is improved, and through the arrangement of the cooling pipe and the cooling air nozzle, the cooling efficiency is improved. By means of the rotary air injection mode, the coil can be cooled more effectively, the cooling efficiency is improved, the temperature sensor and the heaters are arranged circumferentially, the device can monitor the temperature of each section of area of the coil in real time, the temperature of each heater is independently controlled according to needs, and the cooling efficiency is improved. The precise temperature control capability enables the whole temperature control process to be more flexible and reliable.

Description

Technical Field

[0001] This application relates to the field of gas chromatography technology, specifically a temperature control device for a gas chromatograph. Background Technology

[0002] In gas chromatography analysis, the temperature control chamber is a core component, and its performance directly affects the separation effect of the chromatographic column and the accuracy of the entire analysis process. Traditional temperature control chamber designs often have a heating device on the rear wall to heat the interior of the chamber through radiation and convection.

[0003] However, in practical applications, this heating method has some problems, especially when heating the capillary column coil. The capillary coil is a key component in a gas chromatograph used for sample separation. It is usually made of materials such as fused silica, has a small inner diameter, and needs to be wound in multiple layers to increase the separation path. This winding method results in different distances between different sections of the coil and the heating device, causing uneven heating. The part closer to the heating device is too hot, which may accelerate the aging or even damage of the coil; while the part farther away from the heating device is not hot enough to achieve the ideal separation effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a temperature control device for a gas chromatograph, which has advantages such as precise temperature control and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a temperature control device for a gas chromatograph, comprising a housing, wherein two columns are fixedly connected to the inner bottom wall of the housing, and a fixing component is provided at the top of the two columns;

[0006] The fixing assembly includes a central ring, which is fixedly connected to the top of two columns. The central ring is located in the central area of ​​the box. A set of sleeves arranged in a circle are fixedly connected to the outer surface of the central ring. An extension block is slidably inserted into the inside of each sleeve. A contact plate is fixedly connected to the end of each extension block away from the central ring.

[0007] A heating box is installed on the back of the box, and a set of heaters arranged in a circle are installed on the inner rear wall of the heating box;

[0008] A cooling pipe is rotatably connected to the center of the central ring. Multiple circumferentially arranged cooling nozzles are fixedly connected to the outer surface of the cooling pipe. A gas supply pipe is fixedly connected to the rear end of the cooling pipe. The rear end of the gas supply pipe extends to the back of the heating box, and the gas supply pipe is rotatably connected to the back of the heating box.

[0009] Through the above-described scheme, by designing a fixing assembly including a central ring, sleeve, extension block, and contact plate, this device can flexibly adjust the distance between the contact plate and the central ring, thereby adapting to capillary column coils of different diameters and improving overall flexibility. The cooling pipes and cooling nozzles, through a rotating jet spray, can more effectively cool the coil, improving cooling efficiency. The circumferential arrangement of the temperature sensor and multiple heaters allows the device to monitor the temperature of each section of the coil in real time and control the temperature of each heater individually as needed. This precise temperature control capability makes the entire temperature control process more flexible and reliable, contributing to improved accuracy and stability of gas chromatography analysis.

[0010] Furthermore, a temperature sensor is installed at the end of each extension block furthest from the central ring.

[0011] The above scheme, through the circumferential arrangement of multiple temperature sensors, enables the monitoring of the temperature in different sections of the coil. Combined with individual temperature control of each heater, precise temperature control can be achieved, improving heating uniformity.

[0012] Furthermore, a grille is fixedly installed on the back of the box.

[0013] The above solution, through the installation of grilles, can separate the chamber from the heating chamber, preventing the entry of foreign objects.

[0014] Furthermore, a sealing door is hinged to the front end of the housing.

[0015] The above solution, through the installation of a sealed door, can achieve the purpose of sealing the box and improve the overall airtightness.

[0016] Furthermore, a power shaft is rotatably connected to the back of the heating box, and gears are fixedly connected to the outer surface of the power shaft and the rear end of the cooling pipe. The two gears are meshed together, and the rear end of the power shaft is fixedly connected to the output end of an external motor.

[0017] The above solution, through the installation of a motor, can provide power for the rotation of the cooling pipe.

[0018] Furthermore, the rear end of the cooling pipe is rotatably connected to a connecting pipe, and the rear end of the connecting pipe is fixedly connected to the output end of an external air pump.

[0019] The above solution, by connecting the connecting pipe to the cooling pipe through rotation, prevents the connecting pipe from rotating with the cooling pipe, thus facilitating a stable air supply from the external air pump.

[0020] Furthermore, a control host is installed on one side of the enclosure.

[0021] The above scheme, through the settings of the control host, enables the detection of the chamber temperature and the control of the heater.

[0022] Furthermore, adjustable feet are installed at the bottom of the enclosure.

[0023] The above solution, with its adjustable feet, allows users to easily adjust the height of the enclosure and ensure overall levelness.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] This temperature control device for gas chromatographs, through its design of a fixed assembly including a central ring, sleeve, extension block, and contact plate, allows for flexible adjustment of the distance between the contact plate and the central ring. This adapts to capillary column coils of different diameters, improving overall flexibility. The included cooling pipes and cooling nozzles, using a rotating jet method, effectively cool the coil, enhancing cooling efficiency. The circumferential arrangement of temperature sensors and multiple heaters allows for real-time monitoring of the temperature in different sections of the coil and individual temperature control of each heater as needed. This precise temperature control capability makes the entire temperature control process more flexible and reliable, contributing to improved accuracy and stability in gas chromatography analysis. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ;

[0027] Figure 2 This is a structural diagram of the fixed component in this application;

[0028] Figure 3 This is a diagram of the extended block structure of this application;

[0029] Figure 4 This is a structural diagram of the heating box in this application;

[0030] Figure 5 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 2 .

[0031] In the picture:

[0032] 1. Housing; 2. Column; 3. Fixing assembly; 301. Center ring; 302. Sleeve; 303. Extension block; 304. Contact plate; 4. Heating box; 5. Heater; 6. Cooling pipe; 7. Cooling nozzle; 8. Air supply pipe; 9. Temperature sensor; 10. Grille; 11. Sealing door; 12. Drive shaft; 13. Gear; 14. Connecting pipe; 15. Control host; 16. Adjustable feet. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Please see Figure 1 , Figure 2 and Figure 3 The temperature control device for a gas chromatograph in this embodiment includes a housing 1, with two columns 2 fixedly connected to the inner bottom wall of the housing 1, and a fixing component 3 provided at the top of the two columns 2.

[0035] The fixing component 3 includes a central ring 301, which is fixedly connected to the top of the two columns 2. The central ring 301 is located in the central area of ​​the housing 1. A set of sleeves 302 arranged in a circle are fixedly connected to the outer surface of the central ring 301. An extension block 303 is slidably inserted into the inside of each sleeve 302. A contact plate 304 is fixedly connected to the end of each extension block 303 away from the central ring 301. The extension block 303 and the sleeve 302 are fixed by a pin (not shown in the figure). By setting the extension block 303 and the sleeve 302, the distance between the contact plate 304 and the central ring 301 can be adjusted, which is convenient for fixing coils wound with different diameters.

[0036] Please see Figure 1 , Figure 2 and Figure 3 Each extension block 303 is equipped with a temperature sensor 9 at the end away from the central ring 301. The circumferential arrangement of multiple temperature sensors 9 enables the monitoring of the temperature of each section of the coil. Combined with the individual control of the temperature of each heater 5, precise temperature control can be achieved, improving heating uniformity. A heating box 4 is installed on the back of the housing 1. A set of heaters 5 arranged in a circle is installed on the inner rear wall of the heating box 4.

[0037] Please see Figure 1 , Figure 4 and Figure 5 A cooling pipe 6 is rotatably connected to the center of the central ring 301. Multiple circumferentially arranged cooling nozzles 7 are fixedly connected to the outer surface of the cooling pipe 6. An air supply pipe 8 is fixedly connected to the rear end of the cooling pipe 6. The rear end of the air supply pipe 8 extends to the back of the heating box 4, and the air supply pipe 8 is rotatably connected to the back of the heating box 4. Through the above settings, the purpose of rotating air jets from the cooling nozzles 7 can be achieved, which effectively improves the cooling uniformity and thus improves the heat dissipation efficiency. A grille 10 is fixedly installed on the back of the box 1. Through the setting of the grille 10, the purpose of separating the box 1 and the heating box 4 can be achieved, preventing the entry of foreign objects.

[0038] Please see Figure 1 , Figure 4 and Figure 5 A power shaft 12 is rotatably connected to the back of the heating box 4. Gears 13 are fixedly connected to the outer surface of the power shaft 12 and the rear end of the cooling pipe 6. The two gears 13 are meshed together. The rear end of the power shaft 12 is fixedly connected to the output end of an external motor. The motor provides power for the rotation of the cooling pipe 6. A connecting pipe 14 is rotatably connected to the rear end of the cooling pipe 6. The rear end of the connecting pipe 14 is fixedly connected to the output end of an external air pump. The connection between the connecting pipe 14 and the rotation of the cooling pipe 6 prevents the connecting pipe 14 from rotating with the cooling pipe 6, thus facilitating a stable air supply from the external air pump.

[0039] Please see Figure 1 , Figure 2 and Figure 3 The bottom of the enclosure 1 is equipped with adjustable feet 16. The adjustable feet 16 allow the user to easily adjust the height of the enclosure 1 to ensure the overall levelness. The front end of the enclosure 1 is hinged with a sealing door 11. The sealing door 11 can achieve the purpose of sealing the enclosure 1 and improve the overall airtightness. A control host 15 is installed on one side of the enclosure 1. The control host 15 can realize the purpose of detecting the temperature of the enclosure 1 and controlling the heater 5.

[0040] This embodiment provides a temperature control device for a gas chromatograph. By designing a fixing assembly 3 comprising a central ring 301, a sleeve 302, an extension block 303, and a contact plate 304, the device can flexibly adjust the distance between the contact plate 304 and the central ring 301 to accommodate capillary column coils of different diameters, thus improving overall flexibility. The cooling pipe 6 and cooling nozzle 7, through a rotating jet of air, can more effectively cool the coil, improving cooling efficiency. The circumferential arrangement of the temperature sensor 9 and multiple heaters 5 allows the device to monitor the temperature of each section of the coil in real time and control the temperature of each heater 5 individually as needed. This precise temperature control capability makes the entire temperature control process more flexible and reliable, contributing to improved accuracy and stability of gas chromatography analysis.

[0041] The working principle of the above embodiment is as follows: First, the device is adjusted to a suitable horizontal position by the adjustable feet 16 at its bottom to ensure the stability of the overall structure. A sealing door 11 is hinged to the front end of the housing 1. When it is necessary to insert or remove the capillary column coil, the sealing door 11 can be opened. After the operation is completed, it is closed to maintain the airtightness of the housing 1. Next, according to the diameter of the capillary column coil, the distance between the contact plate 304 and the central ring 301 is adjusted by sliding the extension block 303 in the sleeve 302 and fixing it with a pin. In this way, coils of different diameters can be stably fixed around the central ring 301 to ensure the uniformity of heating. The heaters 5 in the heating chamber 4 start to work. They are arranged in a circle and can radiate heat evenly to the coil. Each extension Temperature sensors 9 are installed at the end of the long block 303 away from the central ring 301. These sensors can monitor the temperature of each section of the coil in real time and feed the data back to the control host 15. The control host 15 can control the temperature of each heater 5 individually based on the received temperature data to achieve precise temperature control. This capability makes the entire temperature control process more flexible and reliable, which helps to improve the accuracy and stability of gas chromatography analysis. After heating is completed, the rear end of the connecting pipe 14 is fixedly connected to the output end of the gas pump. The gas supplied by the gas pump enters the cooling pipe 6 through the gas supply pipe 8 and is sprayed out from multiple circumferentially arranged cooling nozzles 7 to cool the coil. Since the cooling pipe 6 is rotating, the cooling nozzles 7 can spray gas evenly to all parts of the coil, improving cooling efficiency and uniformity.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature-controlled device for a gas chromatograph comprising a box (1), characterized in that: The inner bottom wall of the box (1) is fixedly connected to two columns (2), and a fixing component (3) is provided at the top of the two columns (2). The fixing component (3) includes a central ring (301), which is fixedly connected to the top of the two columns (2). The central ring (301) is located in the central area of ​​the box (1). A set of sleeves (302) arranged in a circle are fixedly connected to the outer surface of the central ring (301). An extension block (303) is slidably inserted into the inside of each sleeve (302). A contact plate (304) is fixedly connected to one end of each extension block (303) away from the central ring (301). A heating box (4) is installed on the back of the box (1), and a set of heaters (5) arranged in a circle are installed on the inner rear wall of the heating box (4). A cooling pipe (6) is rotatably connected to the center of the central ring (301). A plurality of circumferentially arranged cooling nozzles (7) are fixedly connected to the outer surface of the cooling pipe (6). A gas supply pipe (8) is fixedly connected to the rear end of the cooling pipe (6). The rear end of the gas supply pipe (8) extends to the back of the heating box (4), and the gas supply pipe (8) is rotatably connected to the back of the heating box (4).

2. A temperature control device for a gas chromatograph as defined in claim 1, wherein: Each of the extension blocks (303) is equipped with a temperature sensor (9) at the end away from the central ring (301).

3. A temperature control device for a gas chromatograph as defined in claim 1, wherein: A grille (10) is fixedly installed on the back of the box (1).

4. The temperature control device for a gas chromatograph according to claim 1, wherein: The front end of the box (1) is hinged with a sealing door (11).

5. A temperature control device for a gas chromatograph according to claim 1, characterized in that: The back of the heating box (4) is rotatably connected to a power shaft (12). Gears (13) are fixedly connected to the outer surface of the power shaft (12) and the rear end of the cooling pipe (6). The two gears (13) are meshed together. The rear end of the power shaft (12) is fixedly connected to the motor output end of the outside.

6. A temperature control device for a gas chromatograph according to claim 1, characterized in that: The rear end of the cooling pipe (6) is rotatably connected to a connecting pipe (14), and the rear end of the connecting pipe (14) is fixedly connected to the output end of an external air pump.

7. A temperature control device for a gas chromatograph according to claim 1, characterized in that: The control host (15) is installed on one side of the enclosure (1).

8. A temperature control device for a gas chromatograph according to claim 1, characterized in that: The bottom of the housing (1) is equipped with adjustable feet (16).

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