Column oven uniform in heating and adaptive to chromatographic columns of multiple specifications

Abstract

The invention relates to the technical field of column temperature boxes, in particular to a uniform-heating column temperature box adaptive to multi-specification chromatographic columns, which comprises a base, supporting legs are fixedly mounted at four corners of the top of the base, a box body is fixedly mounted at the tops of the supporting legs, and a sealing door is hinged to the front surface of the box body. Heating mechanisms are fixedly installed on the back face of the sealing door and the face, away from the sealing door, of the box body. According to the device, the limiting spring is used for resetting, the electric push rod is used for applying pressure, the guide block and the guide frame are matched, the pressure of the telescopic spring is increased to stably clamp the chromatographic column, the V-shaped clamping frame is matched with the telescopic spring to clamp the chromatographic columns of different sizes, and the clamping and positioning strength can be adjusted by adjusting the pressure of the electric push rod; the movable rails are arranged at equal intervals, so that multiple groups of chromatographic column main bodies, multiple groups of shared boxes, heating mechanisms and the like can be clamped, the storage capacity is high, the use cost is reduced, and the requirement of simultaneously storing multiple groups of chromatographic columns with different specifications can be met.

Description

Technical Field

[0001] The present application relates to the technical field of column ovens, and in particular to a column oven that heats evenly and is suitable for chromatographic columns of multiple specifications. Background Art

[0002] The chromatographic column oven is an indispensable and important equipment in chromatographic analysis. It is a device specially designed to control and maintain the temperature of the chromatographic column. During the chromatographic analysis process, the separation effect of the sample in the chromatographic column is greatly affected by the temperature. By maintaining a constant and precise temperature, the chromatographic column oven can improve the shape of the chromatographic peak, increase the separation degree, shorten the analysis time and enhance the reproducibility. Different samples and analysis purposes may require different temperature conditions. The chromatographic column oven can be flexibly set and adjusted according to the needs. For example, in the separation of some complex samples, appropriately increasing the temperature can speed up the separation speed; and in the analysis of thermally unstable substances, low temperature can ensure the stability of the sample. In short, the chromatographic column oven provides a stable and controllable temperature environment for chromatographic analysis, which plays a vital role in obtaining accurate and reliable analysis results. Through searching, Chinese patent announcement number CN220289513U discloses a column temperature box for ion chromatography, which comprises a box body, a hydraulic cylinder is fixedly connected to the middle part of the rear side of the box body, and a connecting plate is fixedly connected to the output end of the hydraulic cylinder, and the upper and lower ends of the inner part of the connecting plate are slidably connected to the mounting plate, and the upper and lower ends of the front side of the mounting plate are provided with slide grooves, and the inner sides of the two slide grooves are slidably connected to two sliding blocks, and the inner side of the mounting plate is slidably connected to two clamping blocks, and the opposite sides of the two clamping blocks are fixedly connected to heat-resistant cotton, and the front side of the clamping block on the right side is fixedly connected to the mounting rope. In the utility model, it is convenient to fix chromatographic columns of different lengths, prevent the chromatographic column from falling off during the heating process, so that the chromatographic column hits the box body and is damaged, thereby improving the working efficiency, making the interior of the column temperature box uniformly heat the chromatographic column as a whole, and enhancing the accuracy of the chromatographic column detection effect; With respect to the above-mentioned related technologies, the inventors found the following defects: First of all, there are obvious limitations in its use. It can only position a single group of chromatographic columns. When it is necessary to control and maintain the temperature of multiple chromatographic columns at the same time, this design obviously cannot meet the needs. The complex positioning and heating structures inside the box can only accommodate a single chromatographic column, which undoubtedly exposes certain defects during use. Moreover, during application, it uses installation ropes to assist in the installation of chromatographic columns. Obviously, this method is not easy to achieve fast and accurate adjustment as a whole. Since the installation ropes are used in high temperature environments for a long time, their service life is easily affected. At the same time, only relying on the installation ropes for auxiliary limiting, the chromatographic columns cannot be stably positioned. The overall lack of a rigid positioning clamping structure leads to poor overall positioning effect during use. Moreover, the installation ropes need to be manually pulled during positioning. It can be seen that the overall operation and positioning process is relatively cumbersome and inconvenient. Therefore, it is necessary to improve it. Summary of the invention

[0003] In order to improve the ease of use of the device, the present application provides a column oven that heats evenly and is adaptable to chromatographic columns of multiple specifications.

[0004] The present application provides a column oven that heats evenly and is suitable for chromatographic columns of multiple specifications, which adopts the following technical solution: comprising a base, wherein support legs are fixedly installed at the four corners of the top of the base, a box body is fixedly installed on the top of the support legs, a sealing door is hinged on the front of the box body, a heating mechanism is fixedly installed on the back of the sealing door and a side of the box body away from the sealing door, a rotating mechanism is fixedly installed on the bottom of the box body, and a limiting mechanism is fixedly installed on the top of the rotating mechanism in a circular arrangement with equal spacing, and a bridge-type handrail is rotatably connected to the top of the box body; The limiting mechanism includes an outer limiting assembly, an inner limiting assembly and a positioning assembly. The outer limiting assembly is arranged in a ring shape with equal intervals and fixedly installed on the outer side of the rotating mechanism. The inner limiting assembly is arranged in a ring shape with equal intervals and fixedly connected to the inner side of the top of the rotating mechanism. The positioning assembly is fixedly installed in the middle of the top of the box. The bottom of the positioning assembly passes through the box and is fittedly connected to the top of the inner limiting assembly. The inner sides of the inner limiting assembly and the outer limiting assembly clamp the chromatographic column body.

[0005] Optionally, the rotating mechanism includes a driving motor, which is fixedly installed in the middle of the bottom of the box. The output end of the driving motor passes through the bottom of the box and is fixedly installed with a turntable. The turntable is rotatably connected to the bottom of the box. The top of the turntable is arranged in a ring at equal intervals and is fixedly connected to a movable rail. The inside of the movable rail is slidably connected to a slider. The outer limit assembly is fixedly installed on the top outer side of the movable rail, and the inner limit assembly is fixedly installed on the top of the slider.

[0006] Optionally, the outer limit assembly includes a limit arm, which is fixedly mounted on the top outer end of the movable rail, the inner side of the limit arm is fixedly connected to the limit seat at equal intervals, and the inner lower end of the limit arm is fixedly mounted with a buffer assembly.

[0007] Optionally, the buffer assembly includes a base plate, which is fixedly mounted on the lower end of one side of the limit arm close to the inner limit assembly, a buffer spring is fixedly mounted on the top of the base plate, a receiving plate is fixedly mounted on the top of the buffer spring, and the top of the receiving plate is fit-connected to the bottom of the chromatographic column body.

[0008] Optionally, a damper is fixedly mounted on the bottom of the receiving plate, and the buffer spring is sleeved on the outside of the damper.

[0009] Optionally, the inner limit assembly includes a fixed arm, which is fixedly installed on the top of the slider, and a telescopic spring is fixedly connected at equal intervals on the inner upper end of the fixed arm close to the side of the limit arm, and a splint is fixedly installed on the end of the telescopic spring, and the inner side of the splint is also fixedly connected to the limit seat at equal intervals, and the chromatographic column body is arranged between the inner sides of the limit seats.

[0010] Optionally, the limiting seat includes a clamping frame, which is fixedly installed on the inner side of the clamping plate and the limiting arm at equal intervals, and reserved grooves are provided on both sides of the clamping frame. The inside of the reserved grooves are rotatably connected with clamping guide rollers, and the overall cross-sectional shape of the clamping frame is V-shaped.

[0011] Optionally, the positioning assembly includes a fixed sleeve and a guide frame, the fixed sleeve is fixedly installed in the middle of the top of the box, an electric push rod is fixedly installed on the inner side of the fixed sleeve, the output end of the electric push rod passes through the box and is fixedly installed with a guide block, the guide frame is fixedly installed on the top of the fixed arm, the overall side shape of the guide frame is a right-angled trapezoid, and the guide block is overall conical.

[0012] Optionally, guide balls are rotatably connected to the top inclined surface of the guide frame at equal intervals, and the top of the guide balls is fitted and connected to the bottom inclined surface of the guide block.

[0013] Optionally, the heating mechanism includes a mounting seat, which is fixedly installed on the inner side of the sealed door close to the box body. The mounting seat is also installed on a side of the box body away from the box door. A mounting groove is provided on the inner side of the mounting seat. Electric heating wires are fixedly connected to the inside of the mounting groove at equal intervals, and the electric heating wires are all arranged in a spiral shape.

[0014] In summary, this application includes the following beneficial technical effects: 1. This device is equipped with a limit mechanism. When in use, the chromatographic column body can be placed inside the limit arm and the clamping plate. The retractable spring resets and drives the clamping plate to move. The inclined surface of the V-shaped clamping frame and the clamping guide roller assist in positioning chromatographic columns of different specifications to avoid surface scratches. After storage, the electric push rod is started to push the guide block downward, so that the fixed arm slides and squeezes the retractable spring, increasing the elasticity and further firmly clamping the chromatographic column body. In actual operation, chromatographic columns of different thicknesses can be accurately and stably clamped and stored; 2. By setting the outer limit assembly and the inner limit assembly, using the limit spring reset and the electric push rod to apply pressure, cooperating with the guide block and the guide frame, increasing the telescopic spring pressure to firmly clamp the chromatographic column, the V-shaped clamping frame with the telescopic spring can clamp chromatographic columns of different sizes, and adjusting the pressure of the electric push rod can adjust the clamping and positioning force. The movable rails are set at equal intervals to clamp multiple groups of chromatographic column bodies, and multiple groups share a box and heating mechanism, etc., with strong storage capacity, reduced use costs, and can meet the needs of storing multiple groups of chromatographic columns of different specifications at the same time; 3. Set up the buffer assembly and place the main body of the chromatographic column on the top of the receiving plate. The buffer spring and damper will provide buffering when moving, and the telescopic spring can also assist in buffering. The clamping force and buffering performance can be changed by adjusting the electric push rod. If strong and stable clamping is required, the electric push rod can be further started. When storing, start the drive motor to drive the turntable to rotate, and the ball bearings can reduce friction. Start the heating wire to make the main body of the chromatographic column rotate evenly and heat it, thereby improving the heating effect and convenience. The buffer assembly can protect the main body of the chromatographic column when it is bumpy during transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application; Figure 2 It is a schematic diagram of the side structure in an embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the limiting mechanism in the embodiment of the present application; Figure 4 This is a schematic diagram of the internal and external limit assembly and the rotating mechanism structure in an embodiment of the present application; Figure 5 It is a schematic diagram of a top view of the limiting mechanism and the rotating mechanism in an embodiment of the present application; Figure 6 This is a schematic diagram of the heating mechanism structure in the embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the inner limit mechanism in the embodiment of the present application; Figure 8 It is a schematic diagram of the structure of the internal and external limit mechanisms in the embodiment of the present application; Fig. 9 In the embodiment of this application Figure 8 A is an enlarged structural diagram of FIG.

[0016] Reference numerals: 1, base; 2, support leg; 3, box; 4, sealing door; 5, heating mechanism; 51, mounting seat; 52, mounting groove; 53, heating wire; 6, rotating mechanism; 61, driving motor; 62, turntable; 63, movable rail; 64, slider; 7, limiting mechanism; 71, external limiting assembly; 711, limiting arm; 712, buffer assembly; 7121, bottom plate; 7122, buffer spring; 7123 , receiving plate; 7124, damper; 72, inner limit assembly; 721, fixed arm; 722, telescopic spring; 723, clamping plate; 73, positioning assembly; 731, fixed sleeve; 732, guide frame; 733, electric push rod; 734, guide block; 735, guide ball; 74, chromatographic column body; 75, limit seat; 751, clamping frame; 752, reserved groove; 753, clamping guide roller; 8, bridge handrail. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-9 This application is described in further detail.

[0018] The present application embodiment discloses a column oven that heats evenly and is suitable for chromatographic columns of various specifications. Figure 1-9 As shown, it includes a base 1, support legs 2 are fixedly installed at the four corners of the top of the base 1, a box 3 is fixedly installed on the top of the support legs 2, a sealed door 4 is hinged on the front of the box 3, a heating mechanism 5 is fixedly installed on the back of the sealed door 4 and the side of the box 3 away from the sealed door 4, a rotating mechanism 6 is fixedly installed on the bottom of the box 3, and a limiting mechanism 7 is fixedly installed on the top of the rotating mechanism 6 in a circular arrangement with equal intervals, and a bridge handrail 8 is rotatably connected to the top of the box 3. The setting of the bridge handrail 8 can facilitate the lifting and carrying of the box 3;

[0019] The limiting mechanism 7 includes an outer limiting assembly 71, an inner limiting assembly 72 and a positioning assembly 73. The outer limiting assembly 71 is arranged in a ring at equal intervals and fixedly installed on the outer side of the rotating mechanism 6. The inner limiting assembly 72 is arranged in a ring at equal intervals and fixedly connected to the inner side of the top of the rotating mechanism 6. The positioning assembly 73 is fixedly installed in the middle of the top of the box body 3. The bottom of the positioning assembly 73 passes through the box body 3 and is fitted and connected with the top of the inner limiting assembly 72. The inner sides of the inner limiting assembly 72 and the outer limiting assembly 71 clamp the chromatographic column body 74. The box body 3 is supported by supporting legs 2 on the top of the base 1 to ensure the stability of the overall structure. The sealing door 4 hinged on the front of the box body 3 and the heating mechanism 5 arranged on the back can be provided for the box from multiple sides. The chromatographic column in the box body 3 provides uniform heat to ensure the heating effect. Secondly, the rotating mechanism 6 cooperates with the limiting mechanisms 7 arranged in an equidistant ring, so that the chromatographic column can be evenly heated in the box body 3. The synergistic effect of the outer limiting assembly 71, the inner limiting assembly 72 and the positioning assembly 73 can firmly clamp the chromatographic column body 74 of different specifications. Furthermore, the positioning assembly 73 passes through the box body 3 and is fitted and connected with the top of the inner limiting assembly 72, which further enhances the positioning effect of the chromatographic column and improves the stability and reliability of the device during operation. For example, when heating and storing chromatographic columns of various specifications, the column oven can fully meet the needs and ensure that each chromatographic column can be evenly and stably heated and positioned.

[0020] Please refer to Figure 2-Figure 5The rotating mechanism 6 includes a driving motor 61, which is fixedly installed in the middle of the bottom of the box body 3. The output end of the driving motor 61 passes through the bottom of the box body 3 and is fixedly installed with a turntable 62. The turntable 62 is rotatably connected to the bottom of the box body 3. The top of the turntable 62 is evenly spaced and arranged in a ring and fixedly connected with a movable rail 63. The inside of the movable rail 63 is slidably connected with a slider 64. The outer limit component 71 is fixedly installed on the top outer side of the movable rail 63. The inner limit component 72 is fixedly installed on the top of the slider 64. The heating mechanism 5 includes a mounting seat 51. The mounting seat 51 is fixedly installed on the inner side of the sealing door 4 close to the box body 3. The mounting seat 51 is also installed on the side of the box body 3 away from the box door. The inner side of the mounting seat 51 is provided with a mounting groove 52. The inside of the mounting groove 52 is evenly spaced and fixedly connected with a heating wire 53. The heating wire 53 is spirally arranged. The driving motor 61 in the rotating mechanism 6 drives the turntable 62 to rotate, so that the movable The rail 63 and the slider 64 as well as the outer limit assembly 71 and the inner limit assembly 72 connected thereto can rotate synchronously, thereby driving the clamped chromatographic column body 74 to rotate, ensuring that each part can be heated evenly, thereby improving the uniformity and comprehensiveness of heating. Secondly, the sliding connection mode of the movable rail 63 and the slider 64 provides the possibility for adjusting the position of the outer limit assembly 71 and the inner limit assembly 72, adapting to chromatographic columns of different sizes and increasing the versatility of the device. Furthermore, in the heating mechanism 5, the mounting seat 51 is fixed to the inner side of the sealing door 4 and the inside of the box body 3, and the spiral heating wires 53 arranged at equal intervals in the mounting groove 52 can generate uniform heat and heat the chromatographic column from multiple directions, thereby further improving the uniformity of heating. For example, when a batch of chromatographic columns of different sizes are subjected to heat treatment, the device can flexibly adjust the clamping position and realize all-round uniform heating, thereby ensuring the performance of the chromatographic column and the accuracy of the experimental results.

[0021] Please refer to Figure 3-Figure 5 , Figure 7-Figure 8The outer limit assembly 71 includes a limit arm 711, which is fixedly installed on the top outer end of the movable rail 63, and the inner side of the limit arm 711 is fixedly connected to the limit seat 75 at equal intervals. A buffer assembly 712 is fixedly installed on the inner lower end of the limit arm 711. The buffer assembly 712 includes a bottom plate 7121, which is fixedly installed on the lower end of one side of the limit arm 711 close to the inner limit assembly 72. A buffer spring 7122 is fixedly installed on the top of the bottom plate 7121, and a receiving plate 7123 is fixedly installed on the top of the buffer spring 7122. The top of the receiving plate 7123 and the bottom of the chromatographic column body 74 are fitted and connected, and a damper 7124 is fixedly installed on the bottom of the receiving plate 7123. The buffer spring 7122 is sleeved on the outside of the damper 7124. The limit arm 711 and the limit seat 75 in the outer limit assembly 71 can It can provide preliminary positioning and limiting for the chromatographic column body 74, ensuring that the chromatographic column has a certain position constraint when it is initially placed. Secondly, the combination of the base plate 7121, buffer spring 7122, receiving plate 7123 and damper 7124 in the buffer assembly 712 plays an important buffering role in the storage and movement of the chromatographic column. When the chromatographic column body 74 is placed on the receiving plate 7123, the buffer spring 7122 can absorb and mitigate possible vibrations and impacts, and the damper 7124 further enhances the buffering effect, ensuring that the bottom of the chromatographic column body 74 is effectively protected and reducing damage caused by external forces. For example, in the process of transporting the column oven, the buffer assembly 712 can cope with bumps and vibrations well, avoiding hard collisions between the chromatographic column body 74 and the bottom, and ensuring the integrity and safety of the chromatographic column.

[0022] Please refer to Figure 3-Figure 5 , Figure 7The inner limit assembly 72 includes a fixed arm 721, which is fixedly installed on the top of the slider 64. A telescopic spring 722 is fixedly connected to the inner upper end of the fixed arm 721 near the limit arm 711 at an equal interval. A clamping plate 723 is fixedly installed on the end of the telescopic spring 722. The inner side of the clamping plate 723 is also fixedly connected to the limit seat 75 at an equal interval. The chromatographic column body 74 is arranged between the inner sides of the limit seat 75. The limit seat 75 includes a clamping frame 751, which is fixedly installed on the inner sides of the clamping plate 723 and the limit arm 711 at an equal interval. The two sides of the frame 751 are provided with reserved grooves 752, and the interiors of the reserved grooves 752 are rotatably connected with clamping guide rollers 753. The overall cross-sectional shape of the clamping frame 751 is set in a V shape. The positioning assembly 73 includes a fixed sleeve 731 and a guide frame 732. The fixed sleeve 731 is fixedly installed in the middle of the top of the box body 3. An electric push rod 733 is fixedly installed on the inner side of the fixed sleeve 731. The output end of the electric push rod 733 passes through the box body 3 and is fixedly installed with a guide block 734. The guide frame 732 is fixedly installed on the top of the fixed arm 721. The overall side shape of the guide frame 732 is The guide block 734 is arranged in a right-angled trapezoidal shape, and the guide block 734 is arranged in a conical shape as a whole. The top inclined surface of the guide frame 732 is rotatably connected with guide balls 735 at equal intervals. The top of the guide ball 735 is fitted and connected with the bottom inclined surface of the guide block 734. The fixed arm 721 in the inner limit assembly 72 is connected to the clamping plate 723 through a telescopic spring 722, which can adapt to chromatographic columns of different sizes. The V-shaped clamping frame 751 and the internal clamping guide roller 753 can ensure stable clamping while avoiding scratching the chromatographic column. The telescopic spring 722 makes the clamping force adjustable to adapt to different The chromatographic columns of the same specifications, secondly, the electric push rod 733 in the positioning assembly 73 drives the conical guide block 734, which cooperates with the right-angled trapezoidal guide frame 732 and the guide ball 735 on the top, and can accurately control the movement of the fixed arm 721, so as to accurately adjust the clamping force to ensure the stable clamping of the chromatographic column. For example, when it is necessary to clamp chromatographic columns of different diameters, the synergistic effect of the internal limit assembly 72 and the positioning assembly 73 can quickly and accurately adjust to the appropriate clamping state, ensuring that the chromatographic column is in a stable position during heating and storage without being disturbed by external factors.

[0023] The implementation principle of the column oven of the embodiment of the present application, which heats evenly and is suitable for chromatographic columns of multiple specifications, is as follows: during use, a limiting mechanism 7 is set so that when the device is in use, the chromatographic column body to be stored can be placed between the limiting arm 711 and the inner side of the clamping plate 723. It should be noted that the telescopic spring 722 itself has a certain elasticity, so when the chromatographic column body is placed between the inner sides of the two limiting seats 75, the telescopic spring 722 will reset and drive the clamping plate 723 to move inward. Since the clamping frame 751 is set in a V-shape, the inner inclined surface thereof can play a good guiding role, thereby stably clamping and positioning the chromatographic column body 74 of different sizes and specifications, and a clamping guide roller 753 is set during the clamping process, which can be used for auxiliary guidance, so that the chromatographic column body 74 can be conveniently and quickly placed The arrangement of the clamping guide roller 753 between the inner sides of the two clamping frames 751 can also prevent the corners of the clamping frames 751 from squeezing the chromatographic column and causing scratches on its surface, so that the chromatographic column can be stored more stably and reliably as a whole. After the chromatographic column is stored, the electric push rod 733 is started to operate, and the electric push rod 733 will push the guide block 734 to move downward. When the guide block 734 moves downward, its inclined surface will contact the top inclined surface of the guide frame 732, thereby driving the fixed arm 721 and the slider 64 to slide inside the movable rail 63, thereby squeezing the telescopic spring 722. When the telescopic spring 722 is in a squeezed state, its elasticity increases, and the chromatographic column body can be further firmly clamped and positioned. For example, in actual operation, whether it is a thicker or thinner chromatographic column body, it can be accurately and stably clamped and stored; By providing the outer limit assembly 71 and the inner limit assembly 72, the device can be used to return the limit spring to the clamping frame 751 during use, so that the chromatographic column body 74 can be clamped between the inner sides of the clamping guide rollers 753. At the same time, during the clamping process, the electric push rod 733 is used to apply pressure, and the guide block 734 is used in conjunction with the guide frame 732 for auxiliary guidance, so that the fixed arm 721 can be squeezed to move toward one side of the limit arm 711. At this time, the pressure on the telescopic spring 722 increases, so that the chromatographic column body 74 can be firmly clamped. Since the telescopic spring 722 has a certain elasticity and ductility, combined with the V-shaped clamping frame 751, it can The chromatographic columns of different sizes can be stably and centrally clamped. When clamping chromatographic columns of different sizes, it is only necessary to adjust the pressure applied by the guide block 734 driven by the electric push rod 733, which makes the overall adaptability of the device very strong. Moreover, since the movable rails 63 are arranged at equal intervals, it is obviously possible to clamp multiple groups of chromatographic column bodies 74. During the overall use, multiple groups of chromatographic column bodies 74 can share a box 3 and a heating mechanism 5 and other components, and the overall storage capacity is stronger. Multiple chromatographic column bodies 74 can be stored without setting up multiple devices, which reduces the overall use cost. For example, in the case where multiple groups of chromatographic columns of different specifications need to be stored at the same time, the device can well meet the needs. By providing the buffer assembly 712, the chromatographic column body 74 can be placed on the top of the receiving plate 7123 during use of the device. In the process of moving and carrying the chromatographic column, the buffer spring 7122 can cooperate with the damper 7124 to assist in buffering, which can have a good buffering effect on the chromatographic column body 74. In addition, due to the provision of the telescopic spring 722, it can also assist in buffering during the clamping process. By adjusting the degree to which the electric push rod 733 pushes the guide block 734 downward, the degree to which the fixed arm 721 squeezes the telescopic spring 722 can be adjusted. Therefore, the clamping force is adjustable, and the buffering performance of the clamping can also be adjusted. If a stronger and more stable clamping is required, it is only necessary to further start the electric push rod 733 to move downward and push it. It can be seen that the device as a whole can be adjusted according to the specific The storage requirements can be adjusted. At the same time, during the storage process, the drive motor 61 can be started to run. The drive motor 61 drives the turntable 62 to rotate, thereby driving the limit assembly to rotate inside the box body 3. Due to the setting of the ball, the ball rolls on the outer surface of the guide block 734 to reduce friction. At this time, the heating wire 53 inside the mounting seat 51 is started again. As the chromatographic column body 74 rotates, each chromatographic column can be evenly contacted with the heat of the heating wire 53, which can improve the overall heating effect of the device and make the overall heating more uniform. The overall coordination can further improve the convenience of using the device. For example, during transportation or storage, if there are bumps, the buffer assembly 712 can well protect the chromatographic column body 74 from damage, thereby improving the overall convenience of using the device.

[0024] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A column oven with uniform heating and adaptable to chromatographic columns of various specifications, characterized in that: The invention comprises a base (1), support legs (2) are fixedly mounted at the four corners of the top of the base (1), a box (3) is fixedly mounted on the top of the support legs (2), a sealing door (4) is hingedly mounted on the front of the box (3), a heating mechanism (5) is fixedly mounted on the back of the sealing door (4) and on the side of the box (3) away from the sealing door (4), a rotating mechanism (6) is fixedly mounted on the bottom of the box (3), a limiting mechanism (7) is fixedly mounted on the top of the rotating mechanism (6) at equal intervals and arranged in a ring, and a bridge-type handrail (8) is rotatably connected to the top of the box (3); The limiting mechanism (7) comprises an outer limiting assembly (71), an inner limiting assembly (72) and a positioning assembly (73); the outer limiting assembly (71) is arranged in a ring at equal intervals and fixedly mounted on the outer side of the rotating mechanism (6); the inner limiting assembly (72) is arranged in a ring at equal intervals and fixedly connected to the inner side of the top of the rotating mechanism (6); the positioning assembly (73) is fixedly mounted in the middle of the top of the box body (3); the bottom of the positioning assembly (73) passes through the box body (3) and is fittedly connected to the top of the inner limiting assembly (72); the inner sides of the inner limiting assembly (72) and the outer limiting assembly (71) clamp a chromatographic column body (74).

2. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 1, characterized in that: The rotating mechanism (6) comprises a driving motor (61), the driving motor (61) being fixedly mounted in the middle of the bottom of the box body (3), the output end of the driving motor (61) penetrating the bottom of the box body (3) and being fixedly mounted with a turntable (62), the turntable (62) being rotatably connected to the bottom of the box body (3), the top of the turntable (62) being fixedly connected with movable rails (63) arranged in a ring at equal intervals, the inside of the movable rail (63) being slidably connected with a slider (64), the outer limit assembly (71) being fixedly mounted on the outer side of the top of the movable rail (63), and the inner limit assembly (72) being fixedly mounted on the top of the slider (64).

3. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 2, characterized in that: The outer limit assembly (71) comprises a limit arm (711), the limit arm (711) being fixedly mounted on the top outer end of the movable rail (63), the inner side of the limit arm (711) being fixedly connected to the limit seat (75) at equal intervals, and the inner lower end of the limit arm (711) being fixedly mounted with a buffer assembly (712).

4. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 3, characterized in that: The buffer assembly (712) comprises a base plate (7121), wherein the base plate (7121) is fixedly mounted on the lower end of a side of the limiting arm (711) close to the inner limiting assembly (72), a buffer spring (7122) is fixedly mounted on the top of the base plate (7121), a receiving plate (7123) is fixedly mounted on the top of the buffer spring (7122), and the top of the receiving plate (7123) is fittedly connected to the bottom of the chromatographic column body (74).

5. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 4, characterized in that: A damper (7124) is fixedly mounted on the bottom of the receiving plate (7123), and the buffer spring (7122) is sleeved on the outside of the damper (7124).

6. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 5, characterized in that: The inner limit assembly (72) comprises a fixed arm (721), wherein the fixed arm (721) is fixedly mounted on the top of the slider (64), and a telescopic spring (722) is fixedly connected at equal intervals to a side of the inner upper end of the fixed arm (721) close to the limit arm (711), and a clamping plate (723) is fixedly mounted on the end of the telescopic spring (722), and the inner side of the clamping plate (723) is also fixedly connected to the limit seat (75) at equal intervals, and the chromatographic column body (74) is arranged between the inner sides of the limit seats (75).

7. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 6, characterized in that: The limiting seat (75) comprises a clamping frame (751), the clamping frame (751) being fixedly mounted at equal intervals on the inner side of the clamping plate (723) and the limiting arm (711), both sides of the clamping frame (751) being provided with reserved grooves (752), the interiors of the reserved grooves (752) being rotatably connected with clamping guide rollers (753), and the overall cross-sectional shape of the clamping frame (751) being arranged in a V-shape.

8. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 7, characterized in that: The positioning assembly (73) comprises a fixing sleeve (731) and a guide frame (732); the fixing sleeve (731) is fixedly mounted in the middle of the top of the box body (3); an electric push rod (733) is fixedly mounted on the inner side of the fixing sleeve (731); an output end of the electric push rod (733) passes through the box body (3) and is fixedly mounted with a guide block (734); the guide frame (732) is fixedly mounted on the top of the fixing arm (721); the overall side shape of the guide frame (732) is in the shape of a right-angled trapezoid; and the guide block (734) is in the shape of a cone as a whole.

9. A column oven with uniform heating and adaptable to chromatographic columns of multiple specifications according to claim 8, characterized in that: The top inclined surface of the guide frame (732) is rotatably connected with guide balls (735) at equal intervals, and the top of the guide balls (735) is fitted and connected to the bottom inclined surface of the guide block (734).

10. The column oven capable of uniform heating and adapting to chromatographic columns of various specifications according to claim 1, characterized in that: The heating mechanism (5) comprises a mounting seat (51), the mounting seat (51) being fixedly mounted on the inner side of the sealing door (4) close to the box body (3), the mounting seat (51) being also mounted on a side of the box body (3) away from the box door, the inner side of the mounting seat (51) being provided with mounting grooves (52), the interior of the mounting grooves (52) being fixedly connected with electric heating wires (53) at equal intervals, the electric heating wires (53) being arranged in a spiral shape.

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