Modular combined quick-change column oven for chromatography

Abstract

The application provides a modular combined quick-replacement column oven for a chromatographic column, and relates to the technical field of column ovens.The modular combined quick-replacement column oven comprises a placing cylinder device; a ring frame is rotationally connected to the inner side of the placing cylinder; a pushing motor is installed on the outer side of the placing cylinder; a threaded rotating rod is installed on the motor shaft of the pushing motor; a supporting guide rod is welded to the inner side of the placing cylinder; a pushing frame is slidably connected to the outer side of the supporting guide rod; a support plate is welded to the inner side of the placing cylinder; a conversion motor is installed on the lower side of the support plate; and a driving gear is installed on the motor shaft of the conversion motor. Through the arrangement of the driving gear, the ring frame, the threaded rotating rod and the pushing frame, the automatic quick replacement of different experimental chromatographic columns in the column oven is realized, the situation that an experimenter is scalded by touching the column oven with hands is avoided, and the problem that an experimenter is scalded by touching a heat source with hands due to the frequent replacement of chromatographic columns of different experimental objects by the traditional column oven is solved.

Description

Technical Field

[0001] This invention belongs to the field of column oven technology, and more specifically, relates to a modular, combined, and rapidly replaceable chromatographic column oven. Background Technology

[0002] A column oven is a device used in chromatographic analysis to control the temperature of a chromatographic column. It provides a stable temperature environment for the column, ensuring that the column can perform chromatographic analysis within a suitable temperature range, thereby improving the accuracy of the analysis. Currently, column ovens use a sealed hinged door with an internal electric heating device to heat the column placed on a flexible clamp. A temperature sensor senses the internal temperature and controls the electric heating device to start and stop, ensuring that the column oven remains within a suitable temperature range. However, in actual chromatographic analysis experiments, multiple sets of columns with different test solutions are often heated and stored. Therefore, throughout the experiment, the experimenter needs to constantly open the hinged door of the column oven to remove the completed column from the flexible clamp and place a new column inside. The experimenter's hands are easily burned when handling columns with different experimental subjects by inserting them into the heated column oven. Therefore, traditional column ovens are extremely inconvenient for handling multiple sets of columns with different experimental subjects, reducing the efficiency of column replacement within the column oven. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a modular, combined, rapid column changer oven to solve the problem of burns to researchers' hands from frequent column changes for different experimental subjects, which requires researchers to insert their hands into the heated chamber.

[0004] This invention provides a modular, combined, rapid-change chromatography column oven, comprising a casing; a back plate is bolted to the rear side of the casing, a conversion control panel is mounted on the rear side of the back plate, a controller is mounted on the inner side of the casing, and a placement cylinder is welded to the front end of the casing; it also includes a heating shell and a chromatography column placement device; the placement cylinder is welded to the rear end of the heating shell, an observation plate is mounted on the front side of the heating shell, a temperature controller is mounted on the inner side of the heating shell, a temperature control panel is mounted on the front side of the temperature controller, an electric heating tube is mounted on the inner side of the heating shell, a breathable baffle is welded to the inner side of the heating shell, and a temperature sensor is mounted on the inner side of the heating shell; a ring is rotatably connected to the inner side of the placement cylinder, a push motor is mounted on the outer side of the placement cylinder, a threaded rotating rod is mounted on the motor shaft of the push motor, a support guide rod is welded to the inner side of the placement cylinder, a push frame is slidably connected to the outer side of the support guide rod, a support plate is welded to the inner side of the placement cylinder, a conversion motor is mounted on the lower side of the support plate, and a drive gear is mounted on the motor shaft of the conversion motor.

[0005] In at least some embodiments, the column placement device includes a placement plate, a knob, an external support block, a placement rack, an experimental column, a pull rod, a push spring, a support, a base, an elastic silicone sleeve, an iron sheet, a bidirectional threaded rod, and a magnetic sheet. The outer side of the bidirectional threaded rod is rotatably connected to the placement rack, the bottom end of the placement rack is bonded to an iron sheet, the top end of the bidirectional threaded rod is equipped with a knob, and the outer side of the bidirectional threaded rod is engaged with an external support block. The front side of the placement plate is welded to a base, the upper side of the base is bonded to a magnetic sheet, and there are six sets of placement plates. Each set of placement plates has a trapezoidal groove with an open top at the center of its front side. The trapezoidal protrusion of the placement rack is embedded in the trapezoidal groove of the placement plate. The rear end of the placement plate has two sets of small through holes, and an elastic silicone sleeve is bonded to each of the small through holes. The rear end of the placement plate is welded to a pull rod, the outer side of the pull rod is slidably connected to a support, the rear end of the pull rod has a ring plate, the front side of the ring plate is welded to a push spring, and the lower side of the placement plate is attached to the upper side of the support 608.

[0006] In at least some embodiments, the external support clamp is an I-shaped structure, with two sets of external support clamps symmetrically distributed vertically. The front center of the external support clamp is provided with a U-shaped slot that runs vertically through it. The experimental chromatographic column is embedded in the U-shaped slot of the external support clamp. The upper side of the I-shaped structure of the external support clamp is provided with a threaded through hole structure that runs vertically through it near the rear end. The positive thread end of the outer side of the bidirectional threaded rod is engaged with the threaded through hole of the upper external support clamp, and the negative thread end of the outer side of the bidirectional threaded rod is engaged with the threaded through hole of the lower external support clamp.

[0007] In at least some embodiments, the placement rack is a rectangular cylindrical structure that runs through the left and right sides. A rectangular through groove is provided at the center of the front side of the rectangular cylindrical structure of the placement rack. The I-shaped structure of the outer support clamp is inserted into the rectangular through groove of the placement rack. The left and right groove walls of the rectangular through groove of the placement rack are respectively attached to the left and right sides of the outer support clamp. A trapezoidal protrusion is provided at the center of the rear side of the placement rack.

[0008] In at least some embodiments, a bracket is welded to the front end of the push spring, and the bracket has a through hole structure that runs through the front and back, with the pull rod inserted into the through hole of the bracket.

[0009] In at least some embodiments, the front side of the observation plate is provided with a long through groove, and heat-resistant glass is installed in the long through groove of the observation plate.

[0010] In at least some embodiments, the ring frame is a ring-plate structure, and the inner side of the ring-plate structure of the ring frame is provided with an internal tooth structure, and the drive gear is meshed with the internal tooth structure of the ring frame.

[0011] In at least some embodiments, the pusher is a Z-shaped folded plate structure. The rear side of the Z-shaped folded plate of the pusher is provided with a threaded through hole near the bottom. The outer side of the threaded rotating rod is threadedly engaged in the threaded through hole of the pusher. The pusher has through holes on both the left and right sides of the threaded through hole, and the support guide rod is inserted into the through hole structure of the pusher.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, on the one hand, a conversion motor drives a drive gear to operate in the gear meshing transmission mechanism at the internal gear structure of the ring frame, causing the ring frame to drive the column placement device to rotate around the vertical central axis of the placement cylinder inside the placement cylinder, allowing the six sets of column placement devices to pass through the opening of the heating shell in sequence. On the other hand, a push motor drives a threaded rotating rod to operate in the threaded through hole of the pusher frame, causing the threaded rotating rod to drive the pusher frame to push the column placement device into the heating shell automatically for heating. After heating is completed, a push spring pushes the ring plate structure of the pull rod to automatically push the placement plate backward out of the heating shell. This realizes the automated and modular rapid replacement of multiple sets of different experimental chromatographic columns in the column oven, eliminating the frequent replacement operation of experimental chromatographic columns by hand in the high-temperature environment of the column oven, and effectively avoiding the situation of experimental personnel being burned by touching the column oven. 2. In this invention, by turning the knob, two sets of external support clamps connected to the forward and reverse thread ends on the outer side of the bidirectional threaded rod move up and down in opposite directions along the long through groove of the placement frame. This allows the two sets of external support clamps to cooperate with the two sets of nut structures at the end of the experimental chromatographic column to support and clamp experimental chromatographic columns of different lengths and models, thereby improving the installation flexibility and structural applicability of the experimental chromatographic column in the column oven. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure from a bottom side view of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 This is a schematic diagram of the rear side structure of the present invention; Figure 5 This is a schematic diagram of the front sectional structure of the present invention; Figure 6 This is a schematic diagram of the sectional structure of the present invention from a bottom view; Figure 7 This is a schematic diagram of the chromatography tube placement device of the present invention; Figure 8 This is a rear side view of the chromatography tube placement device of the present invention; Figure 9This is a right-side view of the chromatography tube placement device of the present invention; Figure 10 This is a schematic diagram of the rear side cross-sectional structure of the chromatography tube placement device of the present invention; Figure 11 This is a schematic diagram of the front cross-sectional structure of the chromatography tube placement device of the present invention.

[0014] Reference numerals: 1. Placement cylinder; 2. Machine cover; 3. Observation plate; 4. Temperature control panel; 5. Heating shell; 6. Column placement device; 601. Placement insert plate; 602. Knob; 603. External support clamp; 604. Placement rack; 605. Experimental chromatographic column; 606. Pull rod; 607. Push spring; 608. Support; 609. Support; 610. Elastic silicone sleeve; 611. Iron sheet; 612. Bidirectional threaded rod; 613. Magnetic sheet; 7. Heat-resistant glass; 8. Drive gear; 9. Ring frame; 10. Push frame; 11. Support guide rod; 12. Threaded rotating rod; 13. Conversion motor; 14. Support plate; 15. Ventilation partition; 16. Heating tube; 17. Temperature controller; 18. Conversion control panel; 19. Control unit; 20. Push motor; 21. Back plate; 22. Temperature sensor. Detailed Implementation

[0015] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0016] like Figures 1-11 As shown, this invention provides a modular, combined, rapid-change column oven, including a housing 2; a back plate 21 is bolted to the rear side of the housing 2, a conversion control panel 18 is mounted on the rear side of the back plate 21, a controller 19 is mounted on the inner side of the housing 2, and a placement cylinder 1 is welded to the front end of the housing 2; it also includes a heating shell 5 and a column placement device 6; the placement cylinder 1 is welded to the rear end of the heating shell 5, an observation plate 3 is mounted on the front side of the heating shell 5, a temperature controller 17 is mounted on the inner side of the heating shell 5, a temperature control panel 4 is mounted on the front side of the temperature controller 17, and the heating shell 5... An electric heating tube 16 is installed on the inner side of the heating shell 5. A breathable baffle 15 is welded to the inner side of the heating shell 5. A temperature sensor 22 is installed on the inner side of the heating shell 5. A ring frame 9 is rotatably connected to the inner side of the placement cylinder 1. A push motor 20 is installed on the outer side of the placement cylinder 1. A threaded rotating rod 12 is installed on the motor shaft of the push motor 20. A support guide rod 11 is welded to the inner side of the placement cylinder 1. A push frame 10 is slidably connected to the outer side of the support guide rod 11. A support plate 14 is welded to the inner side of the placement cylinder 1. A conversion motor 13 is installed on the lower side of the support plate 14. A drive gear 8 is installed on the motor shaft of the conversion motor 13.

[0017] In this embodiment, the column placement device 6 includes a placement insert 601, a knob 602, an external support clamp 603, a placement rack 604, an experimental chromatographic column 605, a pull rod 606, a push spring 607, a bracket 608, a support 609, an elastic silicone sleeve 610, an iron sheet 611, a bidirectional threaded rod 612, and a magnetic sheet 613; the outer side of the bidirectional threaded rod 612 is rotatably connected to the placement rack 604, and the bottom end of the placement rack 604 is bonded with an iron sheet 603. 11. A knob 602 is installed at the top of the bidirectional threaded rod 612, and an outer support clamp 603 is engaged with the outer side of the bidirectional threaded rod 612; a support 609 is welded to the front side of the placement plate 601, and a magnetic sheet 613 is adhered to the upper side of the support 609; there are six sets of placement plates 601, and each set of placement plates 601 has a trapezoidal groove with an open top at the center of the front side; the trapezoidal protrusion of the placement frame 604 is embedded in the trapezoidal groove of the placement plate 601. Inside the slot, the trapezoidal groove of the placement rack 604 provides vertical support to the placement plate 601, allowing the placement rack 604 to slide vertically along the trapezoidal groove of the placement plate 601. This enables the six sets of placement racks 604 to clamp the experimental chromatographic column 605 in a plug-in modular placement on the six sets of placement plates 601. According to the order in which the experimental chromatographic column 605 needs to be heated and analyzed, the experimental chromatographic column 605 can be quickly adjusted and placed without the need for the two sets of external support clamps 603 to loosen or remove it. The rear end of the placement plate 601 has two sets of small through holes, and an elastic silicone sleeve 610 is bonded to the small through holes of the placement plate 601. A pull rod 606 is welded to the rear end of the placement plate 601, and a bracket 608 is slidably connected to the outer side of the pull rod 606. A ring plate is provided at the rear end of the pull rod 606, and a push spring 607 is welded to the front side of the ring plate. The lower side of the placement plate 601 is attached to the upper side of the bracket 608.

[0018] In this embodiment, the external support clamp 603 has an I-shaped structure, with two sets of external support clamps 603 symmetrically distributed vertically. The front center of the external support clamp 603 has a U-shaped slot that runs vertically through it. The experimental chromatographic column 605 is embedded in the U-shaped slot of the external support clamp 603. The upper side of the I-shaped structure of the external support clamp 603 has a threaded through hole structure that runs vertically through it near the rear end. The forward threaded end of the outer side of the bidirectional threaded rod 612 is engaged with the threaded through hole of the upper external support clamp 603, and the reverse threaded end of the outer side of the bidirectional threaded rod 612 is engaged with the threaded through hole of the lower external support clamp 603. The bidirectional threaded rod 612 drives the two sets of external support clamps 603 to move vertically in opposite directions, so that the two sets of external support clamps 603 simultaneously support and fit against the nut structure at the end of the experimental chromatographic column 605, and provide vertically opposite support and clamping fixation according to the length of the experimental chromatographic column 605.

[0019] In this embodiment, the placement rack 604 is a rectangular cylindrical structure that extends from left to right. A rectangular through groove is provided at the center of the front side of the rectangular cylindrical structure of the placement rack 604. The I-shaped structure of the outer support clamp 603 is inserted into the rectangular through groove of the placement rack 604. The left and right walls of the rectangular through groove of the placement rack 604 are respectively attached to the left and right sides of the outer support clamp 603. The rectangular through groove of the placement rack 604 supports the vertical movement of the two sets of outer support clamps 603, ensuring that the two sets of outer support clamps 603 stably attach and support the end face of the nut of the experimental chromatographic column 605. A trapezoidal protrusion is provided at the center of the rear side of the placement rack 604.

[0020] In this embodiment, a support 608 is welded to the front end of the push spring 607. The support 608 has a through hole structure that runs through the front and back. The pull rod 606 is inserted into the through hole of the support 608. The elastic force of the push spring 607 pushes the ring plate structure of the pull rod 606, so that the pull rod 606 pulls the placement plate 601 carrying the experimental chromatographic column 605 to automatically exit the heating shell 5 along the through hole of the support 608, avoiding the need for manual entry into the heating shell 5 to manually remove the experimental chromatographic column 605.

[0021] In this embodiment, the front side of the observation plate 3 is provided with a long through groove, and a heat-resistant glass 7 is installed in the long through groove of the observation plate 3. Through the heat-resistant glass 7, the experimenter can observe the experimental chromatographic column 605 inside the heating shell 5, ensuring that the experimenter can detect leakage of the experimental chromatographic column 605 in a timely manner.

[0022] In this embodiment, the ring frame 9 is a ring-plate structure. The inner side of the ring-plate structure of the ring frame 9 is surrounded by an internal tooth structure. The drive gear 8 is meshed with the internal tooth structure of the ring frame 9. The conversion motor 13 drives the meshed ring frame 9 to rotate inside the placement cylinder 1 through the drive gear 8. The ring frame 9 drives the bracket 608 bolted to the upper side to rotate synchronously. The bracket 608 drives the experimental chromatographic column 605 held by the two sets of external support clamps 603 in the rectangular through groove of the placement frame 604 to rotate and move to the opening position at the rear end of the heating shell 5 through the placement insert plate 601, thus completing the rapid rotation and replacement of the experimental chromatographic column 605.

[0023] In this embodiment, the pusher 10 has a Z-shaped folded plate structure. The rear side of the Z-shaped folded plate of the pusher 10 is provided with a threaded through hole near the bottom. The outer side of the threaded rotating rod 12 is threadedly engaged with the threaded through hole of the pusher 10. The pusher 10 has through holes on both the left and right sides of the threaded through hole. The support guide rod 11 is inserted into the through hole structure of the pusher 10. During the process of the pusher motor 20 driving the threaded rotating rod 12 to rotate, the threaded rotating rod 12 drives the pusher 10 to move forward along the support guide rod 11. The front end of the Z-shaped folded plate structure of the pusher 10 pushes the placement plate 601 to move forward. The placement plate 601 then drives the experimental chromatographic column 605 clamped on the placement frame 604 to automatically penetrate into the heating shell 5, avoiding skin burns when the hands handle the experimental chromatographic column 605.

[0024] The specific usage and function of this embodiment are as follows: When performing automatic heating and replacement of the experimental chromatographic column 605 within the heating shell 5, the experimental chromatographic column 605 is first placed in the U-shaped slots of two sets of external support clamps 603. Then, the knob 602 is manually rotated, causing the bidirectional threaded rod 612 to rotate. Since the two sets of external support clamps 603 are respectively engaged with the forward and reverse threaded ends of the bidirectional threaded rod 612, the bidirectional threaded rod 612 drives the two sets of external support clamps 603 to move vertically along the rectangular through slot of the placement frame 604. The two sets of external support clamps 603 simultaneously contact the nut end face of the experimental chromatographic column 605, supporting and fixing the experimental chromatographic column 605. Then, different experimental chromatographic columns 605 are clamped together. The trapezoidal protrusions of the placement rack 604 are inserted into the trapezoidal grooves of the six placement plates 601. The iron sheet 611 attached to the lower side of the placement rack 604 is attracted to the upper side of the magnetic sheet 613 to magnetically fix the placement rack 604 to the support 609. Then, the injection tubing of the external analyzer is inserted into the elastic silicone sleeve 610. The injection tubing passes through the small through hole of the placement plate 601. Then, each pair of injection tubing is installed at the nozzle of a different experimental chromatographic column 605. After that, the conversion control panel 18 sends a control command to the controller 19 through a wire. The controller 19 then controls the conversion motor 13 to start through the wire. The conversion motor 13 drives the outer side of the drive gear 8 to mesh with the connecting ring 9 to rotate. The ring 9 drives the color... The column placement device 6 moves to the rear opening of the heating shell 5. Then, the control unit 19 starts the push motor 20 via a wire. The push motor 20 drives the pusher 10, which is engaged with the outer side of the threaded rotating rod 12, to move forward along the support guide rod 11. At this time, the pusher 10 pushes the placement plate 601 of the column placement device 6 forward until the front side of the placement plate 601 is in contact with the rear end of the heating shell 5. At this time, the experimental chromatographic column 605 mounted on the column placement device 6 is completely inserted into the inner side of the heating shell 5. Then, the temperature control panel 4 sends a heating command to the temperature controller 17 via a wire. The temperature controller 17 controls the heating tube 16 to emit heat via a wire. The heat radiates onto the experimental chromatographic column 6 through the breathable partition 15. Heating is performed in the surrounding environment. Temperature sensor 22 senses the temperature environment inside the heating shell 5 in real time. When the temperature environment inside the heating shell 5 reaches a suitable temperature range, temperature sensor 22 controls temperature controller 17 to turn off via wire. After a set of experimental chromatographic columns 605 has finished analysis, threaded rotating rod 12 drives pusher 10, which is meshed with the outer side, to move backward along support guide rod 11. At this time, push spring 607 pushes the ring plate structure of pull rod 606, causing pull rod 606 to drive placement plate 601 to move backward, completing the automatic ejection of experimental chromatographic columns 605. Then, ring frame 9 drives another set of chromatographic column placement device 6 to move to the rear end of heating shell 5, thereby completing the continuous automatic replacement of different experimental chromatographic columns 605.

[0025] All the above components are installed, connected, or set up using common mechanical methods, such as welding, threaded connections, and screw connections. Furthermore, the specific structure, model, and coefficient indicators of all components are based on their own technologies. Any method that achieves the desired beneficial effect can be implemented. The temperature control panel 4, experimental chromatographic column 605, conversion motor 13, heating element 16, temperature controller 17, conversion control panel 18, control unit 19, push motor 20, and temperature sensor 22 mentioned above are all common commercially available components. Upon purchase and use, simply connect them according to the instruction manual provided with the purchase; therefore, further details are omitted here.

[0026] The technical solutions of the present invention are not limited to the scope of the embodiments of the present invention, and the technical contents not described in detail in the present invention are all known technologies.

Claims

1. A modular, combined, rapid-change chromatography column oven, comprising a casing (2); a back plate (21) is bolted to the rear side of the casing (2), a conversion control panel (18) is mounted on the rear side of the back plate (21), a control unit (19) is mounted on the inner side of the casing (2), and a placement cylinder (1) is welded to the front end of the casing (2); characterized in that: It also includes a heating shell (5) and a chromatographic column placement device (6); a placement cylinder (1) is welded to the rear end of the heating shell (5), an observation plate (3) is installed on the front side of the heating shell (5), a temperature controller (17) is installed on the inner side of the heating shell (5), a temperature control panel (4) is installed on the front side of the temperature controller (17), an electric heating tube (16) is installed on the inner side of the heating shell (5), a breathable baffle (15) is welded to the inner side of the heating shell (5), and a temperature sensor (22) is installed on the inner side of the heating shell (5); a ring frame is rotatably connected to the inner side of the placement cylinder (1). (9) The ring frame (9) is a ring plate structure. The inner side of the ring plate structure of the ring frame (9) is surrounded by an internal tooth structure. The drive gear (8) is meshed and connected to the internal tooth structure of the ring frame (9). The outer side of the placement cylinder (1) is equipped with a push motor (20). The motor shaft of the push motor (20) is equipped with a threaded rotating rod (12). The inner side of the placement cylinder (1) is welded with a support guide rod (11). The outer side of the support guide rod (11) is slidably connected with a push frame (10). The push frame (10) is a Z-shaped folded plate structure. The rear side of the Z-shaped folded plate of the push frame (10) near the bottom is provided with The threaded through hole and the threaded rotating rod (12) are threadedly engaged in the threaded through hole of the pusher (10). The pusher (10) has through holes on both the left and right sides. The support guide rod (11) is inserted into the through hole structure of the pusher (10). The inner side of the placement cylinder (1) is welded with a support plate (14). The lower side of the support plate (14) is equipped with a conversion motor (13). The motor shaft of the conversion motor (13) is equipped with a drive gear (8). The chromatographic column placement device (6) includes a placement insert plate (601), a knob (602), and an outer support clamp (603). The components include a placement rack (604), an experimental chromatographic column (605), a pull rod (606), a push spring (607), a bracket (608), a support (609), an elastic silicone sleeve (610), an iron sheet (611), a bidirectional threaded rod (612), and a magnetic sheet (613). The outer side of the bidirectional threaded rod (612) is rotatably connected to the placement rack (604), the bottom end of the placement rack (604) is bonded to the iron sheet (611), the top end of the bidirectional threaded rod (612) is equipped with a knob (602), and the outer side of the bidirectional threaded rod (612) is engaged with an external support clamp (603).The front side of the placement plate (601) is welded with a support (609), and a magnetic sheet (613) is bonded to the upper side of the support (609). There are six sets of placement plates (601). Each set of placement plates (601) has a trapezoidal groove with an open top at the center of the front side. The trapezoidal protrusion of the placement frame (604) is embedded in the trapezoidal groove of the placement plate (601). The rear end of the placement plate (601) has two sets of small through holes. An elastic silicone sleeve (610) is bonded to the small through holes of the placement plate (601). The rear end of the placement plate (601) is welded with a pull rod (606). A bracket (608) is slidably connected to the outer side of the pull rod (606). The rear end of the pull rod (606) has a ring plate. A push spring (607) is welded to the front side of the ring plate. The lower side of the placement plate (601) is attached to the upper side of the bracket (608).

2. The modular, combined, rapid-change chromatographic column oven as described in claim 1, characterized in that: The external support clamp (603) has an I-shaped structure. Two sets of external support clamps (603) are symmetrically distributed vertically. The front end center of the external support clamp (603) is provided with a U-shaped slot that runs vertically through the center. The experimental chromatographic column (605) is embedded in the U-shaped slot of the external support clamp (603). The upper side of the I-shaped structure of the external support clamp (603) near the rear end is provided with a threaded through hole structure that runs vertically through the center. The positive thread end of the outer side of the bidirectional threaded rod (612) is engaged and connected to the threaded through hole of the upper external support clamp (603). The reverse thread end of the outer side of the bidirectional threaded rod (612) is engaged and connected to the threaded through hole of the lower external support clamp (603).

3. The modular, combined, rapid-change chromatographic column oven as described in claim 2, characterized in that: The placement rack (604) is a rectangular cylindrical structure that runs through the left and right sides. A rectangular through groove is provided at the center of the front side of the rectangular cylindrical structure of the placement rack (604). The I-shaped structure of the outer support clamp (603) is inserted into the rectangular through groove of the placement rack (604). The left and right walls of the rectangular through groove of the placement rack (604) are respectively attached to the left and right sides of the outer support clamp (603). A trapezoidal protrusion is provided at the center of the rear side of the placement rack (604).

4. The modular, combined, rapid-change chromatographic column oven as described in claim 1, characterized in that: The front end of the push spring (607) is welded with a bracket (608), and the bracket (608) has a through hole structure that runs through the front and back. The pull rod (606) is inserted into the through hole of the bracket (608).

5. The modular, combined, rapid-change chromatographic column oven as described in claim 1, characterized in that: The front side of the observation plate (3) is provided with a long through groove, and heat-resistant glass (7) is installed in the long through groove of the observation plate (3).

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