Modularized combined type column oven capable of rapidly replacing chromatographic column

Abstract

The invention provides a modular combined type column oven capable of rapidly replacing a chromatographic column, and relates to the technical field of column ovens. A ring frame is rotationally connected to the inner side face of the containing cylinder, a pushing motor is installed on the outer side face of the containing cylinder, a threaded rotating rod is installed on a motor shaft of the pushing motor, a supporting guide rod is welded to the inner side face of the containing cylinder, a pushing frame is slidably connected to the outer side face of the supporting guide rod, and a supporting plate is welded to the inner side face of the containing cylinder. A conversion motor is installed on the lower side face of the supporting plate, and a driving gear is installed on a motor shaft of the conversion motor. Through the arrangement of a driving gear, a ring frame, a threaded rotating rod and a push frame, automatic quick replacement work of different experimental chromatographic columns in the column oven is realized, and the situation that hands of experimenters are scalded when touching the column oven is avoided; the problem that according to a traditional column oven, an experimenter needs to frequently replace chromatographic columns of different experimental objects in the mode that the hands penetrate into a heating box body, and consequently the hands of the experimenter are scalded when touching a heat source is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of column ovens, and more specifically, particularly relates to a modular combined rapid replacement column oven for chromatographic columns. Background Art

[0002] A column oven is a device that controls the temperature of a chromatographic column in a chromatographic analysis experiment. It can provide a stable temperature environment for the chromatographic column to ensure that the chromatographic column can perform chromatographic analysis within a suitable temperature range, thereby improving the accuracy of the analysis.

[0003] Currently, inside the column oven, a box body with a sealed flip door is used in combination with an internal electric heating device to wrap and heat the chromatographic column placed on an elastic clamp. Then, a temperature sensor senses the internal temperature to control the start and stop of the electric heating device to ensure that the inside of the column oven is within a suitable temperature range. However, in actual chromatographic analysis experiments, chromatographic columns of multiple different test solutions are usually heated and stored. Therefore, during the entire experiment, the experimenter needs to continuously open the flip door of the column oven, remove the chromatographic column that has completed the experiment from the elastic clamp, and then put a new chromatographic column into the column oven. It is extremely easy for the experimenter's hand to be scalded when reaching into the heated column oven to pick up the chromatographic column. Thus, it can be seen that it is extremely inconvenient to perform the operation of picking up and replacing chromatographic columns of multiple different experimental objects with the traditional column oven, which reduces the replacement efficiency of the chromatographic column in the column oven. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a modular combined rapid replacement column oven for chromatographic columns to solve the problem that the traditional column oven requires the experimenter to frequently replace the chromatographic columns of different experimental objects by reaching into the heated box body with their hands, resulting in the experimenter's hands touching the heat source and being scalded.

[0005] The present invention provides a modular combined rapid replacement chromatographic column oven, including a machine cover; the rear side of the machine cover is connected to a back plate by bolts, a conversion control panel is installed on the rear side of the back plate, a control machine is installed on the inner side of the machine cover, and a placement cylinder is welded to the front end of the machine cover; it also includes a heating shell and a chromatographic column placement device; the rear end of the heating shell is welded to the placement cylinder, an observation plate is installed on the front side of the heating shell, a temperature controller is installed on the inner side of the heating shell, a temperature control panel is installed on the front side of the temperature controller, electric heating tubes are installed on the inner side of the heating shell, a breathable partition plate is welded on the inner side of the heating shell, and a temperature sensor is installed on the inner side of the heating shell; a ring frame is rotatably connected to the inner side of the placement cylinder, a pushing motor is installed on the outer side of the placement cylinder, a threaded rotating rod is installed on the motor shaft of the pushing motor, a support guide rod is welded on 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 on the inner side of the placement 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.

[0006] In at least some embodiments, the chromatographic column placement device includes a placement plug board, a rotary knob, an outer support clamp block, a placement rack, an experimental chromatographic column, a pull rod, a push spring, a bracket, a support, an elastic silica gel sleeve, an iron sheet, a bidirectional threaded rod, and a magnetic sheet; the placement rack is rotatably connected to the outer side of the bidirectional threaded rod, an iron sheet is bonded to the bottom end of the placement rack, a rotary knob is installed at the top of the bidirectional threaded rod, and outer support clamp blocks are meshed and connected to the outer side of the bidirectional threaded rod; a support is welded to the front side of the placement plug board, a magnetic sheet is bonded to the upper side of the placement plug board, the number of placement plug boards is six groups, a trapezoidal groove with an open top is provided at the center of the front side of each group of placement plug boards, a trapezoidal convex strip of the placement rack is embedded in the trapezoidal groove of the placement plug board, two small through holes are provided at the rear end of the placement plug board, an elastic silica gel sleeve is bonded in the small through holes of the placement plug board, a pull rod is welded to the rear end of the placement plug board, a bracket is slidably connected to the outer side of the pull rod, a circular plate is provided at the rear end of the pull rod, a push spring is welded to the front side of the circular plate, and the lower side of the placement plug board is attached to the upper side of the bracket 608.

[0007] In at least some embodiments, the outer support clamp block is of an I-shaped structure, every two groups of outer support clamp blocks are symmetrically distributed up and down, a U-shaped slot penetrating up and down is provided at the center of the front end of the outer support clamp block, the experimental chromatographic column is embedded in the U-shaped slot of the outer support clamp block, a threaded through hole structure penetrating up and down is provided at the position near the rear end of the upper side of the I-shaped structure of the outer support clamp block, the positive threaded end of the outer side of the bidirectional threaded rod is meshed and connected in the threaded through hole of the upper outer support clamp block, and the reverse threaded end of the outer side of the bidirectional threaded rod is meshed and connected in the threaded through hole of the lower outer support clamp block.

[0008] In at least some embodiments, the placement rack is a rectangular cylinder structure that penetrates from left to right. A rectangular through groove is provided at the center of the front side of the rectangular cylinder structure of the placement rack. The I-shaped structure of the outer support clamp block is inserted and embedded in 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 block. A trapezoidal convex strip is provided at the center of the rear side of the placement rack.

[0009] In at least some embodiments, a bracket is welded to the front end of the push spring. The bracket is provided with a through hole structure that penetrates from front to back. The pull rod is inserted into the through hole of the bracket.

[0010] In at least some embodiments, a long strip through groove is provided on the front side of the observation plate. Heat-resistant glass is installed in the long strip through groove of the observation plate.

[0011] In at least some embodiments, the ring rack is a ring plate structure. An internal tooth structure is provided around the inner side of the ring plate structure of the ring rack. The driving gear is meshed and connected to the internal tooth structure of the ring rack.

[0012] In at least some embodiments, the push rack is a Z-shaped folding plate structure. A threaded through hole is provided at a position near the bottom end of the rear side of the Z-shaped folding plate of the push rack. The outer side of the threaded rotating rod is threadedly engaged in the threaded through hole of the push rack. Through hole structures that penetrate from front to back are provided on both the left and right sides of the threaded through hole of the push rack. The support guide rod is inserted into the through hole structure of the push rack.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, on the one hand, the conversion motor drives the driving gear to operate in the internal tooth structure of the ring rack to form a gear meshing transmission mechanism, so that the ring rack drives the chromatographic column placement device to rotate around the vertical central axis of the placement cylinder inside the placement cylinder, allowing the six groups of chromatographic column placement devices to pass through the opening position of the heating shell in turn. On the other hand, the push motor drives the threaded rotating rod to operate in the threaded meshing transmission structure formed in the threaded through hole of the push rack, so that the threaded rotating rod drives the push rack to push the chromatographic column placement device to automatically penetrate deep into the heating shell for heating. After the heating is completed, the push spring is used to push the ring plate structure of the pull rod to drive the placement insertion plate to automatically push out of the heating shell backward, realizing the automatic and modular rapid replacement work of multiple groups of different experimental chromatographic columns in the column oven, abandoning the frequent replacement operation method of the experimental personnel holding the experimental chromatographic column in the high-temperature environment of the column oven, and effectively avoiding the situation that the hands of the experimental personnel are scalded by touching the column oven.

[0014] 2. In the present invention, by turning the knob, two outer support clamps engaged with the positive-thread end and the reverse-thread end on the outer side of the bidirectional threaded rod move up and down in opposite directions along the long through slot of the placement rack, enabling the two outer support clamps to respectively cooperate with the two nut structures at the end of the experimental chromatographic column to support and clamp experimental chromatographic columns of different length models up and down, thus enhancing the installation flexibility and structural applicability of the experimental chromatographic column in the column oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention.

[0016] Figure 2 is a schematic bottom and side view structural diagram of the present invention.

[0017] Figure 3 is a schematic top view structural diagram of the present invention.

[0018] Figure 4 is a schematic rear view structural diagram of the present invention.

[0019] Figure 5 is a schematic front view sectional structural diagram of the present invention.

[0020] Figure 6 is a schematic bottom and side view sectional structural diagram of the present invention.

[0021] Figure 7 is a schematic structural diagram of the chromatographic tube placement device of the present invention.

[0022] Figure 8 is a schematic rear view structural diagram of the chromatographic tube placement device of the present invention.

[0023] Figure 9 is a schematic right view structural diagram of the chromatographic tube placement device of the present invention.

[0024] Figure 10 is a schematic rear view sectional structural diagram of the chromatographic tube placement device of the present invention.

[0025] Figure 11 is a schematic front view sectional structural diagram of the chromatographic tube placement device of the present invention.

[0026] Reference Signs: 1. Placement cylinder; 2. Machine cover; 3. Observation board; 4. Temperature control panel; 5. Heating shell; 6. Chromatography column placement device; 601. Placement insertion board; 602. Rotary knob; 603. Outer support clamp block; 604. Placement rack; 605. Experimental chromatography column; 606. Pull rod; 607. Push spring; 608. Bracket; 609. Support; 610. Elastic silica gel sleeve; 611. Iron sheet; 612. Bidirectional threaded rod; 613. Magnetic sheet; 7. Heat-resistant glass; 8. Driving gear; 9. Ring frame; 10. Pushing frame; 11. Support guide rod; 12. Threaded rotating rod; 13. Conversion motor; 14. Support plate; 15. Vent partition board; 16. Electric heating tube; 17. Temperature controller; 18. Conversion control panel; 19. Control machine; 20. Pushing motor; 21. Back panel; 22. Temperature sensor. Detailed implementation mode

[0027] The following further describes in detail the implementation mode of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] As Figures 1 - 11 shown, the present invention provides a modular combined rapid replacement chromatography column oven, including a machine cover 2; the rear side of the machine cover 2 is connected to a back panel 21 by bolts, a conversion control panel 18 is installed on the rear side of the back panel 21, a control machine 19 is installed on the inner side of the machine cover 2, and a placement cylinder 1 is welded to the front end of the machine cover 2; it also includes a heating shell 5 and a chromatography column placement device 6; the heating shell 5 is welded to the placement cylinder 1 at the rear end, an observation board 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 vent partition board 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 9 is rotatably connected to the inner side of the placement cylinder 1, a pushing 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 pushing motor 20, a support guide rod 11 is welded to the inner side of the placement cylinder 1, a pushing 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, and a driving gear 8 is installed on the motor shaft of the conversion motor 13.

[0029] In an embodiment of the present disclosure, the chromatographic column placement device 6 includes a placement insert 601, a turning knob 602, an outer support clamp 603, a placement rack 604, an experimental chromatographic column 605, a pull rod 606, a compression spring 607, a bracket 608, a support 609, an elastic silica gel 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 a placement rack 604. An iron sheet 611 is bonded to the bottom end of the placement rack 604. A turning knob 602 is installed at the top end of the bidirectional threaded rod 612. The outer side of the bidirectional threaded rod 612 is engaged with an outer support clamp 603. A support 609 is welded to the front side of the placement insert 601. A magnetic sheet 613 is bonded to the upper side of the placement insert 601. The number of placement inserts 601 is six groups. A trapezoidal groove with an open top is provided at the center of the front side of each group of placement inserts 601. The trapezoidal rib of the placement rack 604 is embedded in the trapezoidal groove of the placement insert 601, so that the trapezoidal groove of the placement rack 604 vertically supports the placement insert 601, enabling the placement rack 604 to slide up and down in the trapezoidal groove of the placement insert 601. This realizes the plug-in modular placement of six groups of placement racks 604 for clamping the experimental chromatographic column 605. According to the order in which the experimental chromatographic column 605 needs to be heated and analyzed, the rapid adjustment and placement of the experimental chromatographic column 605 can be carried out without the need to loosen and remove the experimental chromatographic column 605 by two groups of outer support clamps 603. Two small through holes are provided at the rear end of the placement insert 601. An elastic silica gel sleeve 610 is bonded in the small through holes of the placement insert 601. A pull rod 606 is welded to the rear end of the placement insert 601. The outer side of the pull rod 606 is slidably connected to a bracket 608. A ring plate is provided at the rear end of the pull rod 606. A compression spring 607 is welded to the front side of the ring plate. The lower side of the placement insert 601 is attached to the upper side of the bracket 608.

[0030] In an embodiment of the present disclosure, the outer support clamp 603 has an I-shaped structure. Every two groups of outer support clamps 603 are symmetrically distributed up and down. A U-shaped slot that penetrates up and down is provided at the center of the front end of the outer support clamp 603. The experimental chromatographic column 605 is embedded in the U-shaped slot of the outer support clamp 603. A threaded through hole structure that penetrates up and down is provided at a position near the rear end of the upper side of the I-shaped structure of the outer support clamp 603. The positive threaded end on the outer side of the bidirectional threaded rod 612 is engaged in the threaded through hole of the upper outer support clamp 603. The reverse threaded end on the outer side of the bidirectional threaded rod 612 is engaged in the threaded through hole of the lower outer support clamp 603. The bidirectional threaded rod 612 drives two groups of outer support clamps 603 to move towards each other up and down, so that the two groups of outer support clamps 603 simultaneously support and fit against the nut structure at the end of the experimental chromatographic column 605, and the up and down opposite support and clamping are fixed according to the length of the experimental chromatographic column 605.

[0031] In the embodiments of the present disclosure, the placement rack 604 is a rectangular cylindrical structure that penetrates 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 block 603 is inserted and embedded in the rectangular through groove of the placement rack 604. The left groove wall and the right groove wall of the rectangular through groove of the placement rack 604 are respectively attached to the left side surface and the right side surface of the outer support clamp block 603. The rectangular through groove of the placement rack 604 supports the up-and-down vertical movement of the two groups of outer support clamp blocks 603, ensuring that the two groups of outer support clamp blocks 603 stably fit, support, and clamp the nut end surfaces of the experimental chromatographic column 605. A trapezoidal convex strip is provided at the center of the rear side surface of the placement rack 604.

[0032] In the embodiments of the present disclosure, a bracket 608 is welded to the front end of the push spring 607. The bracket 608 is provided with a through-hole structure that penetrates from front to back. The pull rod 606 is inserted into the through hole of the bracket 608. The elastic force of the push spring 607 itself pushes the circular plate structure of the pull rod 606, causing the pull rod 606 to pull the placement plug board 601 carrying the experimental chromatographic column 605 to automatically withdraw from the heating shell 5 along the through hole of the bracket 608, avoiding manual taking of the experimental chromatographic column 605 deep inside the heating shell 5.

[0033] In the embodiments of the present disclosure, a long through groove is provided on the front side surface of the observation plate 3. A heat-resistant glass 7 is installed in the long through groove of the observation plate 3. Through the heat-resistant glass 7, the experimental personnel can observe the experimental chromatographic column 605 in the heating shell 5, ensuring that the experimental personnel can timely discover the liquid leakage situation of the experimental chromatographic column 605.

[0034] In the embodiments of the present disclosure, the ring frame 9 is a ring plate structure. An internal tooth structure is provided around the inner side surface of the ring plate structure of the ring frame 9. The driving gear 8 is meshed and connected to 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 driving gear 8. The ring frame 9 drives the bracket 608 bolted to the upper side surface to rotate synchronously. The bracket 608 drives the experimental chromatographic column 605 clamped by the two groups of outer support clamp blocks 603 in the rectangular through groove of the placement rack 604 to rotate and move to the position of the rear end opening of the heating shell 5 through the placement plug board 601, completing the rapid rotation and replacement work of the experimental chromatographic column 605.

[0035] In the embodiment of the present disclosure, the pushing frame 10 is a Z-shaped folding plate structure. A threaded through hole is provided at a position near the bottom end on the rear side of the Z-shaped folding plate of the pushing frame 10. The outer side surface of the threaded rotating rod 12 is threadedly engaged in the threaded through hole of the pushing frame 10. Through hole structures that penetrate through the front and rear are provided on both the left and right sides of the threaded through hole of the pushing frame 10. The support guide rod 11 is inserted into the through hole structure of the pushing frame 10. During the process of the pushing motor 20 driving the threaded rotating rod 12 to rotate, the threaded rotating rod 12 drives the pushing frame 10 to move forward directionally along the support guide rod 11. The front end of the Z-shaped folding plate structure of the pushing frame 10 pushes the placement insertion plate 601 to move forward directionally, and the placement insertion plate 601 drives the experimental chromatographic column 605 clamped on the placement frame 604 to automatically penetrate into the heating shell 5, avoiding the situation of skin burns when the hand picks up the experimental chromatographic column 605.

[0036] The specific usage mode and function of this embodiment are as follows: When the present invention performs the automatic replacement and heating operation of the experimental chromatographic column 605 inside the heating shell 5, first place the experimental chromatographic column 605 in the U-shaped slots of the two groups of outer support clamp blocks 603, and then manually rotate the knob 602. The knob 602 drives the bidirectional threaded rod 612 to rotate. Since the two groups of outer support clamp blocks 603 are respectively meshed and connected to the positive threaded end and the reverse threaded end of the bidirectional threaded rod 612, the bidirectional threaded rod 612 drives the two groups of outer support clamp blocks 603 to move upward and downward along the rectangular through slot of the placement rack 604. The two groups of outer support clamp blocks 603 simultaneously fit and contact the nut end face at the end of the experimental chromatographic column 605, and the two groups of outer support clamp blocks 603 support and fix the experimental chromatographic column 605. Then insert the trapezoidal rib structures of the placement rack 604 holding different experimental chromatographic columns 605 into the trapezoidal groove structures of the six groups of placement inserts 601 respectively. The iron sheet 611 adhered to the lower side of the placement rack 604 is attracted to the upper side of the magnetic sheet 613 for magnetic adsorption and fixation of the placement rack 604 and the support 609. Then insert the liquid injection hoses of the external analyzer into the elastic silica gel sleeves 610 respectively. The liquid injection hoses pass through the small through holes of the placement inserts 601, and then install every two groups of liquid injection hoses at the pipe orifice parts of different experimental chromatographic columns 605 respectively. After that, the conversion control panel 18 sends control instructions to the control machine 19 through the wire. The control machine 19 then controls the conversion motor 13 to start through the wire. The conversion motor 13 drives the ring frame 9 meshed and connected to the outer side of the driving gear 8 to rotate. The ring frame 9 drives the chromatographic column placement device 6 to move to the rear end opening part of the heating shell 5. Then the control machine 19 controls the push motor 20 to start through the wire. The push motor 20 drives the push frame 10 meshed and connected to the outer side of the threaded rod 12 to move forward along the support guide rod 11. At this time, the push frame 10 pushes the placement insert 601 of the chromatographic column placement device 6 forward until the front side of the placement insert 601 fits against the rear end of the heating shell 5. At this time, the experimental chromatographic column 605 carried by the chromatographic column placement device 6 completely penetrates into the inside of the heating shell 5. Then the temperature control panel 4 sends a heating instruction to the temperature controller 17 through the wire. The temperature controller 17 controls the electric heating tube 16 to emit heat through the wire. The heat passes through the breathable partition 15 and radiates into the surrounding environment of the experimental chromatographic column 605 for heating. The temperature sensor 22 real-time senses the temperature environment inside the heating shell 5. Until the temperature environment inside the heating shell 5 reaches the appropriate temperature range, the temperature sensor 22 controls the temperature controller 17 to turn off through the wire. When the analysis of a group of experimental chromatographic columns 605 is completed, the threaded rod 12 drives the push frame 10 meshed and connected to the outer side to move backward along the support guide rod 11. At this time, the push spring 607 pushes the ring plate structure of the pull rod 606, so that the pull rod 606 drives the placement insert 601 to move backward, completing the automatic ejection work of the experimental chromatographic column 605. Then the ring frame 9 drives another group of chromatographic column placement devices 6 to move to the rear end of the heating shell 5, thus completing the continuous automatic replacement work of different experimental chromatographic columns 605.

[0037] The installation methods, connection methods, or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc. Moreover, the specific structures, models, and coefficient indicators of all its components are its own technologies, and any implementation that can achieve its beneficial effects is acceptable. The temperature control panel 4, experimental chromatographic column 605, conversion motor 13, electric heating tube 16, temperature controller 17, conversion control panel 18, control machine 19, push motor 20, and temperature sensor 22 used above are all common devices on the market. When purchased and used, it only needs to be connected according to the operation manual purchased together to be used, so it will not be elaborated here.

[0038] The technical solution of the present invention is not limited within the scope of the embodiments of the present invention. The technical content not described in detail in the present invention is well-known technology.

Claims

1. A modular combined rapid-change chromatographic column oven, comprising a machine cover (2); the rear side of the machine cover (2) is bolted to a back plate (21), a conversion control panel (18) is installed on the rear side of the back plate (21), a control machine (19) is installed on the inner side of the machine cover (2), and a placement cylinder (1) is welded to the front end of the machine cover (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 partition plate (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 (9) is rotatably connected to the inner side of the placement cylinder (1), a pushing 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 pushing motor (20), a support guide rod (11) is welded to the inner side of the placement cylinder (1), a pushing 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), and a driving gear (8) is installed on the motor shaft of the conversion motor (13).

2. The modular combined rapid replacement chromatographic column oven according to claim 1, wherein: The chromatographic column placement device (6) includes a placement insertion plate (601), a turning knob (602), an outer support clamping block (603), a placement rack (604), an experimental chromatographic column (605), a pull rod (606), a pushing spring (607), a bracket (608), a support (609), an elastic silica gel sleeve (610), an iron sheet (611), a bidirectional threaded rod (612), and a magnetic sheet (613); the bidirectional threaded rod (612) is rotatably connected to the outer side of the placement rack (604), an iron sheet (611) is bonded to the bottom end of the placement rack (604), a turning knob (602) is installed at the top of the bidirectional threaded rod (612), and the outer support clamping block (603) is meshed and connected to the outer side of the bidirectional threaded rod (612); a support (609) is welded to the front side of the placement insertion plate (601), a magnetic sheet (613) is bonded to the upper side of the placement insertion plate (601), the number of placement insertion plates (601) is six groups, a trapezoidal groove with an open top is provided at the center of the front side of each group of placement insertion plates (601), a trapezoidal rib of the placement rack (604) is embedded in the trapezoidal groove of the placement insertion plate (601), two small through holes are provided at the rear end of the placement insertion plate (601), an elastic silica gel sleeve (610) is bonded in the small through holes of the placement insertion plate (601), a pull rod (606) is welded to the rear end of the placement insertion plate (601), 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), a pushing spring (607) is welded to the front side of the ring plate, and the lower side of the placement insertion plate (601) is attached to the upper side of the bracket (608).

3. The modular combined rapid replacement chromatographic column oven according to claim 2, characterized in that: The outer support clamping block (603) is of an I-shaped structure. Every two groups of outer support clamping blocks (603) are symmetrically distributed up and down. The center of the front end of the outer support clamping block (603) is provided with a U-shaped slot that penetrates up and down. The experimental chromatographic column (605) is embedded in the U-shaped slot of the outer support clamping block (603). A threaded through-hole structure that penetrates up and down is provided at a position near the rear end on the upper side of the I-shaped structure of the outer support clamping block (603). The positive-thread end on the outer side of the bidirectional threaded rod (612) is meshed and connected in the threaded through-hole of the upper outer support clamping block (603), and the reverse-thread end on the outer side of the bidirectional threaded rod (612) is meshed and connected in the threaded through-hole of the lower outer support clamping block (603).

4. The modular combined rapid replacement chromatographic column oven according to claim 2, wherein: The placement rack (604) is of a rectangular cylinder structure that penetrates left and right. A rectangular through-groove is provided at the center of the front side of the rectangular cylinder structure of the placement rack (604). The I-shaped structure of the outer support clamping block (603) is inserted and embedded in the rectangular through-groove of the placement rack (604). The left groove wall and the right groove wall of the rectangular through-groove of the placement rack (604) are respectively attached to the left side and the right side of the outer support clamping block (603). A trapezoidal rib is provided at the center of the rear side of the placement rack (604).

5. The modular combined type rapid replacement chromatographic column oven according to claim 2, characterized in that: A bracket (608) is welded to the front end of the push spring (607). A through-hole structure that penetrates front and back is provided on the bracket (608). The pull rod (606) is inserted through the through-hole of the bracket (608).

6. The modular combined rapid replacement chromatographic column oven according to claim 2, wherein: A long through-groove is provided on the front side of the observation plate (3). A heat-resistant glass (7) is installed in the long through-groove of the observation plate (3).

7. The modular combined rapid replacement chromatographic column oven according to claim 1, wherein: The ring frame (9) is of a ring plate structure. An internal tooth structure is provided around the inner side of the ring plate structure of the ring frame (9). The driving gear (8) is meshed and connected to the internal tooth structure of the ring frame (9).

8. The modular combined rapid replacement chromatographic column oven according to claim 1, characterized in that: The pushing frame (10) is of a Z-shaped folding plate structure. A threaded through-hole is provided at a position near the bottom end on the rear side of the Z-shaped folding plate of the pushing frame (10). The threaded rotating rod (12) is threadedly meshed and connected to the threaded through-hole of the pushing frame (10). Through-hole structures that penetrate front and back are provided on both the left and right sides of the threaded through-hole of the pushing frame (10). The support guide rod (11) is inserted through the through-hole structure of the pushing frame (10).

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