Portable heating device for chromatographic column of liquid chromatograph

Abstract

The utility model discloses a chromatographic column portable heating device for a liquid chromatograph, which relates to the technical field of chromatographic column heating and comprises a heating cylinder, a protective cover is mounted at the top of the heating cylinder in a threaded manner, and a plurality of heating sleeves are rotatably mounted in the heating cylinder. And a driving mechanism used for driving the multiple heating sleeves to rotate synchronously is arranged on the inner bottom wall of the heating cylinder, multiple round holes are formed in the protective cover, cover plates are installed in the round holes in a threaded mode, and clamping mechanisms are arranged at the lower ends of the cover plates. According to the utility model, by arranging the clamping mechanism, the chromatographic column can be fixed on the cover plate, so that the chromatographic column can be conveniently inserted into the heating sleeves, and by arranging the driving mechanism, the plurality of heating sleeves can be driven to synchronously rotate, so that the chromatographic column is uniformly heated, the effect of uniformly heating the plurality of chromatographic columns at the same time is realized, and the practicability of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic column heating, in particular to a portable heating device for a chromatographic column of a liquid chromatograph. Background Art

[0002] The chromatographic column is a key component in a liquid chromatograph for separating sample components. Its main function is to provide a stationary phase with a large surface area to interact with the solutes in the mobile phase, enabling different components to be distributed between the stationary phase and the mobile phase, thereby achieving sample separation. Chromatographic column heating is a common technical means in liquid chromatography analysis. Currently, when heating a chromatographic column, the chromatographic column is usually placed in a closed container, and a hot air blower, a heating rod or other heat sources are arranged inside the container to increase the temperature inside the container and achieve heating of the chromatographic column. However, the positions of the chromatographic column and the heat source are usually relatively fixed. During actual heating, due to the principle of heat conduction, the part of the chromatographic column close to the heat source will be heated first, while the part far from the heat source has a lower temperature, forming a temperature gradient, resulting in uneven heating of the chromatographic column and easily causing damage to the chromatographic column. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a portable heating device for a chromatographic column of a liquid chromatograph, which solves the technical problem that the existing equipment heats the chromatographic column unevenly and easily causes damage to the chromatographic column.

[0004] To solve the above technical problems, the utility model provides the following technical solutions: A portable heating device for a chromatographic column of a liquid chromatograph includes a heating cylinder. A protective cover is threadedly installed at the top of the heating cylinder. A plurality of heating sleeves are rotatably installed inside the heating cylinder. A driving mechanism for driving the plurality of heating sleeves to rotate synchronously is arranged on the inner bottom wall of the heating cylinder. A plurality of round holes are opened on the protective cover, and a cover plate is threadedly installed inside the round holes. A clamping mechanism is arranged at the lower end of the cover plate.

[0005] Further, the plurality of heating sleeves are circumferentially and uniformly distributed around the center of the heating cylinder, and the plurality of round holes respectively correspond to the plurality of heating sleeves.

[0006] Further, a heating cavity is opened inside the heating sleeve, and at least three heating rods are fixedly installed inside the heating cavity and are circumferentially and uniformly distributed.

[0007] Further, the driving mechanism includes a servo motor. The servo motor is fixedly installed at the bottom of the heating cylinder, and the output end of the servo motor extends into the heating cylinder and is fixedly connected with a driving gear. A driven gear is fixedly sleeved at the lower end of each of the plurality of heating sleeves, and each of the plurality of driven gears meshes with the driving gear.

[0008] Furthermore, the clamping mechanism includes two vertical plates symmetrically installed at the lower end of the cover plate. A lead screw is threadedly connected inside the vertical plate, and a clamping plate is rotatably connected to the end of the lead screw.

[0009] Furthermore, a sealing cover is fixedly connected to the upper end of the cover plate. The diameter of the sealing cover is larger than the diameter of the round hole, and a handle is fixedly connected to the top of the sealing cover.

[0010] Furthermore, a heat preservation sleeve is sleeved on the outer surface of the heating cylinder, and a hanging rope is installed on the heat preservation sleeve.

[0011] By means of the above technical solutions, the present utility model provides a portable heating device for a chromatographic column of a liquid chromatograph, which at least has the following beneficial effects:

[0012] 1. By setting the clamping mechanism, the present utility model can fix the chromatographic column on the cover plate, and then facilitate inserting the chromatographic column into the heating sleeve. By setting the driving mechanism, it can drive multiple heating sleeves to rotate synchronously, making the chromatographic column heated evenly, achieving the effect of uniformly heating multiple chromatographic columns simultaneously, and improving the practicability of the device.

[0013] 2. By setting multiple cover plates, when it is necessary to take out a single chromatographic column, the corresponding cover plate can be rotated to take out the chromatographic column installed at the lower end of the cover plate, without opening the entire protective cover, which can reduce the heat loss in the heating cylinder and reduce the influence on the temperature of other chromatographic columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the illustrative embodiments and descriptions thereof are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a cross-sectional view of the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the heating cylinder of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the heating sleeve of the present utility model;

[0019] Figure 5 is a schematic diagram of the structure of the protective cover of the present utility model;

[0020] Figure 6 is a schematic diagram of the structure of the clamping mechanism of the present utility model.

[0021] In the figure: 1, heating cylinder; 2, protective cover; 3, heating jacket; 4, drive mechanism; 41, servo motor; 42, driving gear; 43, driven gear; 5, cover plate; 6, clamping mechanism; 61, vertical plate; 62, lead screw; 63, clamping plate; 7, handle; 8, heat preservation jacket; 9, hanging rope; 10, round hole; 11, heating cavity; 12, heating rod; 13, sealing cover. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Currently, when heating a chromatographic column, the chromatographic column is usually placed in a closed container, and a hot air blower, a heating rod or other heat sources are arranged inside the container to increase the temperature inside the container and realize the heating of the chromatographic column. However, the positions of the chromatographic column and the heat source are usually relatively fixed. During actual heating, due to the principle of heat conduction, the part of the chromatographic column close to the heat source will be heated first, while the part far from the heat source has a lower temperature, forming a temperature gradient, resulting in uneven heating of the chromatographic column and easy damage to the chromatographic column.

[0024] To solve the defects existing in the above heating device during the heating process, please refer to Figures 1 - 6, a chromatographic column portable heating device provided by the utility model for a liquid chromatograph can not only ensure uniform heating of the chromatographic column, but also heat multiple chromatographic columns simultaneously, improving the practicality of the device. The heating device is based on a heating cylinder 1. A protective cover 2 is threadedly installed at the top of the heating cylinder 1. A plurality of heating sleeves 3 are rotatably installed inside the heating cylinder 1. A heating cavity 11 is formed inside the heating sleeve 3. At least three heating rods 12 evenly distributed circumferentially are fixedly installed inside the heating cavity 11. The heating rods 12 are used to heat the heating sleeve 3. The plurality of heating sleeves 3 can heat a plurality of chromatographic columns. A driving mechanism 4 for driving the plurality of heating sleeves 3 to rotate synchronously is arranged on the inner bottom wall of the heating cylinder 1. The chromatographic column is inserted into the heating sleeve 3. The rotation of the heating sleeve 3 can drive the plurality of heating rods 12 to rotate. The rotation of the heating rods 12 can make the chromatographic column evenly heated, avoiding temperature difference on the surface of the chromatographic column. A plurality of circular holes 10 are formed on the protective cover 2. The plurality of heating sleeves 3 are evenly distributed circumferentially along the center of the heating cylinder 1. The plurality of circular holes 10 respectively correspond to the plurality of heating sleeves 3. A cover plate 5 is threadedly installed inside the circular hole 10. A clamping mechanism 6 is arranged at the lower end of the cover plate 5. The clamping mechanism 6 is used to fix the chromatographic column. By installing the protective cover 2 on the heating cylinder 1, a plurality of chromatographic columns can be respectively inserted into the plurality of heating sleeves 3, and then the driving mechanism 4 is driven to drive the plurality of heating sleeves 3 to rotate synchronously, achieving the effect of simultaneously and evenly heating a plurality of chromatographic columns. Moreover, when it is necessary to take out a specified chromatographic column, only need to rotate the corresponding cover plate 5 to take out the chromatographic column installed at the lower end of the cover plate 5, without opening the entire protective cover 2, which can reduce the heat loss in the heating cylinder 1 and reduce the influence on the temperature of other chromatographic columns.

[0025] In order to realize the synchronous rotation of the plurality of heating sleeves 3, as shown in Figure 3 shown, wherein, a servo motor 41 is fixedly installed at the bottom of the heating cylinder 1, and the output end of the servo motor 41 extends into the heating cylinder 1 and is fixedly connected with a driving gear 42. A driven gear 43 is fixedly sleeved at the lower end of each of the plurality of heating sleeves 3. The plurality of driven gears 43 are all meshed with the driving gear 42. The driving gear 42 and the driven gears 43 are both rotatably connected to the inner bottom wall of the heating cylinder 1. Driving the servo motor 41 can drive the driving gear 42 to rotate. The rotation of the driving gear 42 can drive the plurality of driven gears 43 to rotate. The rotation of the plurality of driven gears 43 can drive the plurality of heating sleeves 3 to rotate synchronously.

[0026] Since it is necessary to fix the chromatographic column at the lower end of the cover plate 5 to facilitate inserting the chromatographic column into the heating sleeve 3, as shown in Figure 5 and Figure 6 shown, two vertical plates 61 symmetrically installed at the lower end of the cover plate 5 are provided. A lead screw 62 is threadedly connected inside the vertical plate 61. The end of the lead screw 62 is rotatably connected with a clamping plate 63. Rotating the lead screw 62 can push the clamping plate 63 to move. The two clamping plates 63 approaching can clamp and fix the chromatographic column.

[0027] Since the cover plate 5 is threadedly connected to the round hole 10, there is a gap between the cover plate 5 and the round hole 10, and the heat in the heating cylinder 1 will be lost from the gap. Therefore, a sealing cover 13 is fixedly connected to the upper end of the cover plate 5. The diameter of the sealing cover 13 is larger than the diameter of the round hole 10. The setting of the sealing cover 13 can block the round hole 10 and reduce the heat loss in the heating cylinder 1.

[0028] When the staff needs to separately take out a certain chromatographic column, it is necessary to rotate the corresponding sealing cover 13 to take out the cover plate 5 from the round hole 10. When rotating the sealing cover 13, the adjacent sealing cover 13 may affect the operation of the staff, making it inconvenient for the staff to apply a torsional force to the sealing cover 13. To solve this technical problem, a handle 7 is fixedly connected to the top of the sealing cover 13. It is more convenient to drive the cover plate 5 to rotate through the handle 7, facilitating the taking out of a certain chromatographic column.

[0029] For the convenience of carrying and transporting the equipment, as shown in Figure 1 a heat preservation sleeve 8 is sleeved on the outer surface of the heating cylinder 1. The heat preservation sleeve 8 can effectively reduce the heat dissipation from the surface of the heating cylinder 1, thereby helping to maintain the stability of the temperature inside the heating cylinder 1. A hanging rope 9 is installed on the heat preservation sleeve 8. The hanging rope 9 can be used to easily lift or move the heating cylinder 1, improving the portability of the equipment.

[0030] The control mode of the present utility model is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming of those skilled in the art. The provision of power also belongs to the common knowledge in the art. And the present utility model is mainly used to protect mechanical devices, so the control mode and circuit connection of the present utility model will not be explained in detail.

[0031] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A portable heating device for a chromatographic column of a liquid chromatograph, comprising a heating cartridge (1), characterized in that: The top of the heating tube (1) is threadedly mounted with a protective cover (2), a plurality of heating sleeves (3) are rotatably mounted inside the heating tube (1), an inner bottom wall of the heating tube (1) is provided with a driving mechanism (4) for driving the plurality of heating sleeves (3) to rotate synchronously, a plurality of circular holes (10) are formed on the protective cover (2), a cover plate (5) is threadedly mounted inside the circular holes (10), and a clamping mechanism (6) is provided at the lower end of the cover plate (5).

2. The portable heating device for a chromatographic column according to claim 1, characterized in that: The plurality of heating sleeves (3) are evenly distributed along the circumference of the center of the heating cylinder (1), and the plurality of circular holes (10) respectively correspond to the plurality of heating sleeves (3).

3. The portable heating device for a chromatographic column according to claim 1, characterized in that: A heating chamber (11) is provided inside the heating sleeve (3), and at least three circumferentially evenly distributed heating rods (12) are fixedly installed inside the heating chamber (11).

4. The portable heating device for a chromatographic column according to claim 1, characterized in that: The driving mechanism (4) comprises a servo motor (41), the servo motor (41) is fixedly mounted on the bottom of the heating tube (1), and the output end of the servo motor (41) extends to the inside of the heating tube (1) and is fixedly connected to a driving gear (42), and the lower ends of the plurality of heating sleeves (3) are fixedly sleeved with driven gears (43), and the plurality of driven gears (43) are meshed with the driving gear (42).

5. The portable heating device for a chromatography column according to claim 1, characterized in that: The clamping mechanism (6) comprises two vertical plates (61) symmetrically mounted on the lower end of the cover plate (5); the internal threads of the vertical plates (61) are connected to a screw rod (62); the end of the screw rod (62) is rotatably connected to a clamping plate (63).

6. The portable heating device for a chromatography column according to claim 1, characterized in that: A sealing cover (13) is fixedly connected to the upper end of the cover plate (5); the diameter of the sealing cover (13) is larger than the diameter of the circular hole (10); and a handle (7) is fixedly connected to the top of the sealing cover (13).

7. The portable heating device for a chromatography column according to claim 1, characterized in that: The outer surface of the heating cylinder (1) is provided with a heat-insulating sleeve (8), and a hanging rope (9) is installed on the heat-insulating sleeve (8).

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