Internal and external liquid pipe switching device of liquid chromatograph column temperature box

Abstract

This application relates to the field of liquid chromatography technology, and in particular to an internal and external liquid tubing adapter for a liquid chromatograph column oven. The adapter includes a column oven body, with a displacement mechanism fixedly installed on the upper side of one side of the column oven body. A cover plate is fixedly installed on the inner side of the displacement mechanism. During use, if it is necessary to separate the connector and the fitting head, the device can be adjusted by first rotating a circular block to retract the torsion spring and move the limiting arc rod outwards, then fitting the connector back on. The torsion spring resets, causing the circular block to insert the limiting arc rod into the limiting arc sleeve. The arc-shaped fit and the spring force ensure a quick and stable connection between the connector and the fitting head. During disassembly, the circular block is rotated in the opposite direction to remove the limiting arc rod. During assembly / disassembly, pressing the pressing plate causes the sliding block to move the linkage frame against the inclined surface of the linkage rod, causing it to rotate the circular block in the opposite direction, disengaging the limiting arc rod from the limiting sleeve, thus separating the connector and the fitting head. This further improves the convenience of separation and assembly based on the rapid assembly / disassembly of the adapter.

Description

Technical Field

[0001] This application relates to the field of liquid chromatography technology, and in particular to an internal and external liquid tube adapter for a liquid chromatograph column oven. Background Technology

[0002] Currently, a chromatograph is a device specifically used for chromatographic separation and analysis. Based on the differences in the physical state of the sample, chromatographs can be further divided into gas chromatographs, liquid chromatographs, gel chromatography, etc. Chromatographs are widely used for the content analysis of chemical products and polymer materials. Among them, gel chromatography can also determine the molecular weight and distribution of polymer materials. A typical liquid chromatograph includes the following components: a reservoir, a system pump, an injector, a column, a detector, a data storage device, and a fraction collector. During system operation, the system pump delivers the mobile phase from the reservoir to the system tubing. The sample enters the tubing through the injector, mixes with the mobile phase, and is then loaded into the stationary phase of the column. Because the components in the sample have different partition coefficients in the mobile and stationary phases, the relative motion between these two phases, through repeated adsorption-desorption processes, results in significant differences in the velocity of each component. Consequently, they are separated into individual components within the column, which elute sequentially. As they pass through the detector, photoelectric conversion transforms the different concentration values ​​corresponding to each component passing through the detector into electrical signals, which are then transmitted to the data storage device. The data is displayed in real-time on the monitor in the form of a chromatogram. Researchers can determine the time required for the fraction collector to collect the target product based on the corresponding chromatographic peaks on the chromatogram. In existing liquid chromatography systems, a column oven is typically used to heat the chromatographic column. The liquid tubing inside and outside the column oven is connected by a connector, which is usually suspended in the air. The vibrations generated by the liquid chromatograph during operation can adversely affect the connector and the internal and external liquid tubing. Some have attempted to fix the connector by drilling threaded holes in the column oven shell and connecting the connector to the threaded holes. However, this method is difficult to manufacture and can easily damage the shell when machining the threaded holes, resulting in high costs. A search revealed Chinese Patent Publication No. CN216247829U, which discloses an internal and external liquid tube adapter for a liquid chromatograph column oven. The adapter includes a connector and a spring plate. The connector passes through the middle of the spring plate and has an internal threaded hole. The spring plate has a first bend, a second bend, and a third bend at both ends. The second bend is located above the spring plate, and the third bend is attached to the side of the connector. Corresponding holes are provided on the second bend and the spring plate, and they are connected by bolts. This invention uses a spring plate to fix the connector and assists in the connection between the connector and the column oven shell. When a through hole is opened in the column oven shell, the connection between the connector and the shell can be well maintained, reducing production costs.

[0003] Regarding the aforementioned related technologies, the inventors have discovered the following drawbacks: During application, the aforementioned device is installed using bolts, and its connectors are threaded to the pipes. However, in practice, when the connector needs to be disassembled, the bolts must be removed. Removing the bolts obviously requires specialized tools. Even with specialized tools, disassembly and assembly on confined spaces often necessitates frequent use of wrenches, making the overall disassembly and maintenance process cumbersome and inconvenient. Furthermore, the connector's top and bottom are threaded to the external pipe, a complex pipe connection method that typically requires manual rotation of the pipe to install it into the connector's threaded grooves. This obviously requires the assistance of wrenches, screwdrivers, and other tools, making the disassembly and assembly process cumbersome and inconvenient, thus requiring improvement. Summary of the Invention

[0004] To improve the ease of disassembly and maintenance, this application provides an internal and external liquid pipe adapter for a liquid chromatograph column oven.

[0005] This application provides a liquid chromatograph column oven internal and external liquid tubing adapter, which adopts the following technical solution: it includes a column oven body, a displacement mechanism is fixedly installed on the upper side of one side of the column oven body, a cover plate is fixedly installed on the inner side of the displacement mechanism, a slot is opened on the upper side of the column oven body near the displacement mechanism, the cover plate covers the outside of the slot, an installation mechanism is fixedly installed at equal intervals on the top of the cover plate, an adapter tube is fixedly installed at equal intervals on the top of the cover plate through the installation mechanism, a quick connector is fixedly installed through the bottom of the adapter tube through the cover plate, and a quick connector is also fixedly installed on the top of the adapter tube; The installation mechanism includes a sleeve and an installation groove. The sleeve is fixedly installed at equal intervals on the top of the cover plate. The installation groove is opened at equal intervals on the top of the cover plate. The bottom of the installation groove penetrates the cover plate. The installation groove is located inside the sleeve. A sleeve is inserted into the inside of the installation groove. A limiting component is fixedly installed on one side of the sleeve. The sleeve is installed inside the installation groove through the limiting component. The adapter is fixedly installed inside the sleeve.

[0006] Optionally, the limiting component includes a side frame and a limiting hole. The side frame is fixedly installed on one side of the sleeve. Limiting springs are fixedly installed on both inner sides of the side frame. A movable block is fixedly installed at the end of the limiting spring. A limiting pin is fixedly connected to the side of the movable block away from the limiting spring. The limiting pin passes through the sleeve. The limiting hole is opened on the side of the sleeve near the limiting pin. The end of the limiting pin is inserted into the inner side of the limiting hole.

[0007] Optionally, a connecting shaft is fixedly connected to the side of the movable block away from the limiting pin, and a pull ring is fixedly installed at the end of the connecting shaft through the side frame.

[0008] Optionally, the quick connector includes a connector head and a mating head. The connector head is fixedly installed at the bottom and top of the adapter tube, and the mating head is located at the upper end of the adapter tube and the lower end of the adapter tube inside the column temperature chamber. A snap-fit ​​mechanism is fixedly installed at the outer end of the connector head, and the inner end of the mating head is sleeved on the outer surface of the connector head. A column temperature chamber tube is fixedly installed at the outer end of the mating head, and the connector head is connected to the mating head through the snap-fit ​​mechanism.

[0009] Optionally, the snap-fit ​​mechanism includes a side groove and a limiting arc sleeve. The side groove is fixedly installed on both sides of the bottom of the connector. One side of the side groove passes through the connector. A torsion spring is fixedly installed inside the side groove. A round block is fixedly installed at the end of the torsion spring. A connecting rod is fixedly installed on the side of the round block near the connector. A limiting arc rod is fixedly connected to the end of the connecting rod near the connector. The limiting arc sleeve is fixedly installed on the inner side of the connector near the end of the limiting arc rod. The limiting arc rod is inserted into the inner side of the limiting arc sleeve.

[0010] Optionally, the limiting arc rod and the limiting arc sleeve are both arranged concentrically with the circular block, and a linkage component is fixedly connected to the side of the connector near the circular block.

[0011] Optionally, the linkage assembly includes a side rail and a linkage rod. The side rail is fixedly installed on the side of the connector near the circular block, and the linkage rod is fixedly installed on the outside of the circular block. A sliding block is slidably connected inside the side rail, and a linkage frame is fixedly installed on the outside of the sliding block. The outside of the linkage frame and the inside of the linkage rod are fitted together.

[0012] Optionally, the linkage rod is generally arranged in a J-shape, the outer end of the linkage frame is arranged in an isosceles trapezoid, and the outer slope of the linkage frame is attached to and connected with the inner slope of the linkage rod.

[0013] Optionally, the overall cross-sectional shape of the sliding block and the cross-sectional shape of the inner cavity of the side rail are both arranged in a convex shape, and a pressing plate is fixedly installed on the outer side of the linkage frame.

[0014] Optionally, the displacement mechanism includes an outer rail frame fixedly installed on the top of the column temperature box near the notch, one outer end side of the outer rail frame is fixedly connected with a drive motor, an output end of the drive motor penetrates through the outer rail frame and is fixedly installed with a screw rod, the screw rod is rotatably connected inside the outer rail frame, an outer surface of the screw rod is threadedly connected with a thread sleeve, one side of the thread sleeve is fixedly connected with a cover plate, and the cover plate is slidably connected inside the outer rail frame.

[0015] In conclusion, the present application comprises the following beneficial technical effects: When it is necessary to remove the adapter tube during use, start the driving motor to drive the screw rod to rotate, drive the threaded sleeve to slide in the outer rail frame. Since the threaded sleeve is fixedly connected with the cover plate, the sliding of the threaded sleeve drives the cover plate to displace, adjusting the lateral movement of the cover plate can shift the adapter, quick connector and the like from one side of the column temperature chamber. Thus, during assembly and disassembly, after unfastening the quick connector in the column temperature box and shifting the cover plate, the adapter tube can be quickly split and pipeline docking can be performed, which significantly improves the convenience of operation when using the device; When disassembling the adapter tube during use, pull the pull ring to move the connecting shaft outward, drive the movable block to pull the limit pin out of the limit hole, and the sleeve in the installation groove loses its limit, so that the adapter tube can be removed. When installing the adapter tube, insert the adapter tube and pull the connecting shaft to move the limit pin outward against the contraction of the limit spring, insert the sleeve into the installation groove and then release the pull ring, the limit spring resets and drives the movable block to drive the limit pin to insert into the limit hole for limiting, which realizes rapid disassembly and assembly of the adapter tube and improves the convenience during use; When in use, first adjust the circular block to rotate so that the torsion spring contracts and the limit arc rod moves outward, then put on the adapter, the torsion spring resets and drives the circular block to make the limit arc rod insert into the limit arc sleeve, the arc-shaped fitting and the elastic force of the torsion spring enable the adapter and the connector to be quickly and stably connected. When disassembling, adjust the circular block to rotate reversely to pull out the limit arc rod. When assembling and disassembling, press the pressing plate, the sliding block drives the linkage frame to abut against the slope of the linkage rod, prompting the linkage rod to drive the circular block to rotate reversely, so that the limit arc rod disengages from the limit sheath, realizing the separation of the adapter and the connector. On the basis of rapid disassembly and assembly of the adapter tube, the convenience of separation is improved. Description of Drawings

[0016] Figure 1 is a schematic diagram of the overall structure in the embodiment of the present application; Figure 2 is a top-view structural schematic diagram of the cover plate in an unfolded state in an embodiment of the present application; Figure 3 This is a bottom view of the cover plate in the unfolded state in an embodiment of this application; Figure 4 This is a top view schematic diagram of the displacement mechanism in the embodiments of this application; Figure 5 This is a bottom view schematic diagram of the displacement mechanism in the embodiments of this application; Figure 6 This is a schematic diagram of the disassembled state of the displacement mechanism and the installation mechanism in the embodiments of this application; Figure 7 This is a schematic diagram of the limiting component structure in an embodiment of this application; Figure 8 This is an embodiment of the present application. Figure 6 A magnified structural diagram at point A; Figure 9 This is a schematic diagram of the connector structure in an embodiment of this application.

[0017] Reference numerals: 1. Column temperature chamber; 2. Displacement mechanism; 21. Outer rail frame; 22. Drive motor; 23. Lead screw; 24. Threaded sleeve; 3. Mounting mechanism; 31. Sleeve connector; 32. Mounting groove; 33. Sleeve; 34. Limiting assembly; 341. Side frame; 342. Limiting hole; 343. Limiting spring; 344. Movable block; 345. Limiting pin; 346. Coupling shaft; 347. Pull ring; 4. Groove; 5. Cover plate 6. Adapter pipe; 7. Quick connector; 71. Connector head; 72. Butt joint; 73. Snap-fit ​​mechanism; 731. Side groove; 732. Limiting arc sleeve; 733. Torsion spring; 734. Round block; 735. Connecting rod; 736. Limiting arc rod; 737. Linkage assembly; 7371. Side rail; 7372. Linkage rod; 7373. Sliding block; 7374. Linkage frame; 7375. Pressing plate; 74. Column temperature chamber tube. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0019] This application discloses an internal and external liquid tube transfer device for a liquid chromatograph column oven, which adopts the following technical solution: it includes a column oven body 1, a displacement mechanism 2 is fixedly installed on the upper side of one side of the column oven body 1, a cover plate 5 is fixedly installed on the inner side of the displacement mechanism 2, a slot 4 is opened on the upper side of the column oven body 1 near the displacement mechanism 2, the cover plate 5 covers the outside of the slot 4, an installation mechanism 3 is fixedly installed at equal intervals on the top of the cover plate 5, a transfer tube 6 is installed at equal intervals on the top of the cover plate 5 through the installation mechanism 3, a quick connector 7 is fixedly installed through the bottom of the transfer tube 6 through the cover plate 5, and a quick connector 7 is also fixedly installed on the top of the transfer tube 6. The mounting mechanism 3 includes sleeves 31 and mounting slots 32. Sleeves 31 are fixedly installed at equal intervals on the top of the cover plate 5. Mounting slots 32 are equally spaced on the top of the cover plate 5, with their bottoms penetrating the cover plate 5. All mounting slots 32 are located inside the sleeves 31. A sleeve 33 is inserted into the inner side of each mounting slot 32. A limiting component 34 is fixedly installed on one side of the sleeve 31. The sleeve 33 is installed inside the mounting slot 32 via the limiting component 34. A transition pipe 6 is fixedly installed inside the sleeve 33. The combination design of the displacement mechanism 2 and the cover plate 5 allows for flexible adjustment of the position of components such as the transition pipe 6, facilitating operation and maintenance when needed, and improving work efficiency. The spacing of the installation mechanism 3 ensures a reasonable and orderly installation layout for the adapter pipe 6, enhancing the stability and reliability of the device. The cooperation of the sleeve pipe 31, the mounting groove 32, and the sleeve 33, along with the function of the limit component 34, ensures the firmness of the adapter pipe 6 installation, effectively preventing loosening or detachment during use. Quick connectors 7 are fixedly installed at the top and bottom of the adapter pipe 6, greatly simplifying the process of pipe connection and disassembly, saving operation time, and improving work convenience. In summary, the adapter device is ingeniously designed, with all components working together to provide an efficient, stable, and convenient solution for the internal and external liquid pipe connection of the liquid chromatograph column oven.

[0020] Please refer to Figures 1-7 The limiting component 34 includes a side frame 341 and a limiting hole 342. The side frame 341 is fixedly installed on one side of the sleeve 31. Limiting springs 343 are fixedly installed on both inner sides of the side frame 341. A movable block 344 is fixedly installed at the end of the limiting spring 343. A limiting pin 345 is fixedly connected to the side of the movable block 344 away from the limiting spring 343. The limiting pin 345 passes through the sleeve 31. The limiting hole 342 is opened on the side of the sleeve 33 near the limiting pin 345. The end of the limiting pin 345 is inserted into the inner side of the limiting hole 342. A connecting shaft 346 is fixedly connected to the side of the movable block 344 away from the limiting pin 345. A pull ring 347 is fixedly installed at the end of the connecting shaft 346 through the side frame 341. The side frame 341 is configured as an internal component. The system provides a stable installation base. The presence of the limiting spring 343 gives the movable block 344 and the limiting pin 345 a certain elastic buffering capacity, enabling flexible insertion during installation and reducing damage to components from hard impacts. At the same time, it provides a continuous and stable limiting force after insertion, preventing the sleeve 33 from accidentally coming out. The fixed connection between the movable block 344 and the limiting pin 345 ensures the consistency and accuracy of the action, allowing the limiting pin 345 to be accurately inserted into the limiting hole 342, achieving a reliable limiting function. The design of the coupling 346 and the pull ring 347 facilitates the operator's manual control of the insertion and removal of the limiting pin 345. The operation is simple and convenient, and both the installation and removal of the sleeve 33 can be easily completed, improving work efficiency and convenience.

[0021] Please refer to Figures 5-8 The quick connector 7 includes a connector 71 and a mating connector 72. The connector 71 is fixedly installed at the bottom and top of the adapter tube 6. The mating connector 72 is located at the upper end of the adapter tube 6 and the lower end of the adapter tube 6 inside the column temperature chamber 1. A snap-fit ​​mechanism 73 is fixedly installed on the outer end of the connector 71. The inner end of the mating connector 72 is sleeved on the outer surface of the connector 71. A column temperature chamber tube 74 is fixedly installed on the outer end of the mating connector 72. The connector 71 and the mating connector 72 are connected through the snap-fit ​​mechanism 73. The snap-fit ​​mechanism 73 includes a side groove 731. The limiting arc sleeve 732 and the side groove 731 are fixedly installed on both sides of the bottom of the connector 71. One side of the side groove 731 penetrates the connector 71. A torsion spring 733 is fixedly installed inside the side groove 731. A round block 734 is fixedly installed at the end of the torsion spring 733. A connecting rod 735 is fixedly installed on the side of the round block 734 near the mating joint 72. A limiting arc rod 736 is fixedly connected to the end of the connecting rod 735 near the mating joint 72. The limiting arc sleeve 732 is fixedly installed on the inner side of the mating joint 72 near the end of the limiting arc rod 736. The limiting arc rod 736 is inserted into the inner side of the limiting arc sleeve 732. Both the limiting arc rod 736 and the limiting arc sleeve 732 are arranged concentrically with the circular block 734. The connecting head 71 is fixedly connected to the linkage component 737 on the side near the circular block 734. The connecting head 71 is fixedly installed at the bottom and top of the adapter pipe 6, providing a basis for stable connection. The mating joint 72 is sleeved on the outer surface of the connecting head 71, with a tight fit. The side groove 731, torsion spring 733, circular block 734, connecting rod 735, and limiting arc rod 73 in the snap-fit ​​mechanism 73 are all included. The 6 and the limiting arc sleeve 732 work together to achieve an efficient and stable connection. The torsion spring 733 gives the round block 734 elastic force, which allows the limiting arc rod 736 to automatically insert into the limiting arc sleeve 732, achieving a quick connection that is firm and not easy to loosen. At the same time, the concentric circle setting ensures the accuracy and stability of the connection. In addition, the presence of the linkage component 737 further enhances the convenience of operation. Whether connecting or disassembling, it can be completed easily and quickly, improving work efficiency and reducing operation time and difficulty.

[0022] Please refer to Figures 4-6 and Figure 8The linkage component 737 includes a side rail 7371 and a linkage rod 7372. The side rail 7371 is fixedly installed on the side of the connector 71 near the circular block 734. The linkage rod 7372 is fixedly installed on the outside of the circular block 734. A sliding block 7373 is slidably connected inside the side rail 7371. A linkage frame 7374 is fixedly installed on the outside of the sliding block 7373. The outside of the linkage frame 7374 and the inside of the linkage rod 7372 are fitted together. The linkage rod 7372 is generally U-shaped. The outer end of the linkage frame 7374 is an isosceles trapezoid. The outer inclined surface of the linkage frame 7374 and the inner inclined surface of the linkage rod 7372 are fitted together. The overall cross-sectional shape of the sliding block 7373 and the cross-sectional shape of the internal cavity of the side rail 7371 are both U-shaped. A pressing plate 7375 is fixedly installed on the outside of the linkage frame 7374. The side rail 7371 provides a stable sliding track for the sliding block 7373, ensuring the accuracy and smoothness of its movement. The fixed installation method of the linkage rod 7372 and the circular block 734 ensures the reliability of motion transmission. The fixed connection between the sliding block 7373 and the linkage frame 7374 is tight and stable, allowing the linkage frame 7374 to slide flexibly within the side rail 7371 along with the sliding block 7373. The U-shaped arrangement of the linkage rod 7372 and the isosceles trapezoidal arrangement at the outer end of the linkage frame 7374 complement each other. The clever connection between the inclined surfaces of the two components effectively transmits force. The convex cross-section design of the sliding block 7373 and the side rail 7371 enhances the stability of sliding and prevents the sliding block 7373 from dislodging. The setting of the pressing plate 7375 provides a convenient operating position for the operator. By simply pressing the pressing plate 7375, the linkage of the linkage frame 7374 and the linkage rod 7372 can realize the linkage action of the relevant components. The operation is simple and direct, which greatly improves the convenience and efficiency of the work.

[0023] Please refer to Figures 1-6The displacement mechanism 2 includes an outer rail frame 21, which is fixedly installed on the top of the column temperature chamber 1 near the slot 4. A drive motor 22 is fixedly connected to one side of the outer end of the outer rail frame 21. A lead screw 23 is fixedly installed through the outer rail frame 21 at the output end of the drive motor 22. The lead screw 23 is rotatably connected to the inside of the outer rail frame 21. A threaded sleeve 24 is threadedly connected to the outer surface of the lead screw 23. One side of the threaded sleeve 24 is fixedly connected to a cover plate 5. The cover plate 5 is slidably connected to the inside of the outer rail frame 21. The fixed installation of the outer rail frame 21 provides a stable foundation structure for the entire displacement mechanism 2. The drive motor 22 provides the power for displacement operation. The power source, whose output end passes through the lead screw 23 connected to the outer rail frame 21, can achieve precise rotation control. The threaded connection between the lead screw 23 and the threaded sleeve 24 converts the rotation of the lead screw 23 into the linear motion of the threaded sleeve 24. The motion process is smooth and precise. The fixed connection between the threaded sleeve 24 and the cover plate 5 ensures that the cover plate 5 can slide stably inside the outer rail frame 21 as the threaded sleeve 24 moves. This design allows for precise, flexible and stable displacement through the control of the drive motor 22 when the position of related components needs to be adjusted, improving the convenience and controllability of operation and meeting the needs under different working conditions.

[0024] The implementation principle of the internal and external liquid pipe adapter of the liquid chromatograph column oven in this application embodiment is as follows: By setting the displacement mechanism 2, if the adapter pipe 6 needs to be removed during use, the drive motor 22 can be started to rotate. The drive motor 22 drives the lead screw 23 to rotate. The rotation of the lead screw 23 can assist the threaded sleeve 24 to slide inside the outer rail frame 21. Since the threaded sleeve 24 and the cover plate 5 are fixedly connected, the linear sliding of the threaded sleeve 24 can drive the cover plate 5 to slide inside the outer rail frame 21. By adjusting the lateral movement of the cover plate 5, the adapter and quick connector 7 can be moved from one side of the column oven body 1. In this way, during the disassembly and assembly process, it is only necessary to disconnect the quick connector 7 inside the column oven body 1 and then move the cover plate 5, which facilitates the quick disassembly of the adapter pipe 6 and also facilitates the pipe docking work, which can significantly improve the overall ease of use and operation of this device. By setting the installation mechanism 3, when the adapter pipe 6 needs to be disassembled during use, the connecting shaft 346 can be pulled outward by pulling the pull ring 347. The outward movement of the connecting shaft 346 can drive the movable block 344 to move, causing the limit pin 345 to disengage from the limit hole 342. After the limit pin 345 and the limit hole 342 are separated, the sleeve pipe 31 located inside the mounting groove 32 loses its limit, and the adapter pipe 6 can be removed from the inside of the mounting groove 32. If the adapter pipe 6 needs to be installed, simply insert the adapter pipe 6 into the inside of the mounting groove 32. During this process, pulling the connecting shaft 346 will drive the limit pin 345 to move outward, and the limit pin 345 will... When the limiting spring 343 is engaged, it is forced into a contracted state. At this time, the sleeve 31 on the outside of the adapter 6 is inserted into the inside of the mounting groove 32. The pull ring 347 is released, and the limiting spring 343 is reset. The limiting spring 343 can then push the movable block 344 outward. The outward movement of the movable block 344 can drive the limiting pin 345 to be inserted into the inside of the limiting hole 342. Through the mutual limiting of the limiting pin 345 and the limiting hole 342, the sleeve 31 can be stably installed in the inside of the mounting groove 32. In this way, the adapter 6 can be quickly disassembled and assembled, which can greatly improve the convenience of use of the device. By incorporating the quick connector 7, during use, the device first allows the torsion spring 733 to retract by rotating the adjusting block 734. Simultaneously, the limiting arc rod 736 at the end of the connecting rod 735 moves outward. Then, the mating connector 72 is fitted onto the outside of the connector 71. The torsion spring 733 then resets, causing the block 734 to rotate. Since the block 734, the limiting arc rod 736, and the limiting arc sleeve 732 are all concentrically arranged, after the mating connector 72 and the connector 71 are fully mated, the torsion spring 733... The reset mechanism causes the circular block 734 to rotate the limiting arc rod 736 at the end of the connecting rod 735. The rotation of the limiting arc rod 736 allows it to be inserted into the inner side of the limiting arc sleeve 732. Both the limiting arc rod 736 and the limiting arc sleeve 732 are arc-shaped. After their rotation and interlocking, the torsion spring 733 provides limiting elasticity, and their arc-shaped interlocking shape allows for quick and stable connection between the butt joint 72 and the connector 71. If disassembly is required, simply adjust the circular block 734 to rotate in the opposite direction to allow the limiting arc rod 736 to be inserted into the inner side of the limiting arc sleeve 732. 6. The limiting arc sleeve 732 is withdrawn. Simultaneously, during disassembly and assembly, the linkage component 737 allows the pressing plate 7375 to move during this process. The pressing plate 7375 slides along the inner side of the side rail 7371 via the sliding block 7373, enabling the sliding block 7373 to stably drive the linkage frame 7374 to abut against the inner inclined surface of the linkage rod 7372. The trapezoidal inclined surface of the linkage frame 7374 and the inner inclined surface of the linkage rod 7372 abut against each other, thereby causing the linkage rod 7372 to move... The rotating circular block 734 rotates in the opposite direction, causing the limiting arc rod 736 at the end of the connecting rod 735 to rotate and move outward, causing the limiting arc rod 736 to disengage from the limiting sleeve. This allows the entire device to quickly disengage the two sets of limiting arc rods 736 from the limiting sleeve, at which point the mating joint 72 and the connecting head 71 can be separated from each other. It can be seen that the entire device, based on the quick disassembly and assembly adapter pipe 6, adopts the quick connector 7, which can further improve the convenience of separating the mating joint 72 and the connecting head 71.

[0025] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A liquid chromatography column oven internal and external liquid pipe adapter, comprising a column oven body (1), a displacement mechanism (2) fixedly installed on the upper side of one side of the column oven body (1), a cover plate (5) fixedly installed on the inner side of the displacement mechanism (2), a slot (4) is opened on the upper side of the column oven body (1) near the displacement mechanism (2), the cover plate (5) covers the outside of the slot (4), an installation mechanism (3) is fixedly installed at equal intervals on the top of the cover plate (5), a transfer pipe (6) is installed at equal intervals on the top of the cover plate (5) through the installation mechanism (3), a quick connector (7) is fixedly installed through the cover plate (5) at the bottom of the transfer pipe (6), and a quick connector (7) is also fixedly installed on the top of the transfer pipe (6); The installation mechanism (3) includes a sleeve (31) and an installation groove (32). The sleeve (31) is fixedly installed at equal intervals on the top of the cover plate (5). The installation groove (32) is opened at equal intervals on the top of the cover plate (5). The bottom of the installation groove (32) penetrates the cover plate (5). The installation groove (32) is located inside the sleeve (31). A sleeve (33) is inserted into the inside of the installation groove (32). A limiting component (34) is fixedly installed on one side of the sleeve (31). The sleeve (33) is installed inside the installation groove (32) through the limiting component (34). The adapter (6) is fixedly installed inside the sleeve (33). The quick connector (7) includes a connector (71) and a mating connector (72). The connector (71) is fixedly installed at the bottom and top of the adapter tube (6). The mating connector (72) is located at the upper end of the adapter tube (6) and the lower end of the adapter tube (6) inside the column temperature chamber (1). A snap-fit ​​mechanism (73) is fixedly installed on the outer end of the connector (71). The inner end of the mating connector (72) is sleeved on the outer surface of the connector (71). A column temperature chamber tube (74) is fixedly installed on the outer end of the mating connector (72). The connector (71) and the mating connector (72) are connected through the snap-fit ​​mechanism (73). The snap-fit ​​mechanism (73) includes a side groove (731) and a limiting arc sleeve (732). The side groove (731) is fixedly installed on both sides of the bottom of the connector (71). One side of the side groove (731) passes through the connector (71). A torsion spring (733) is fixedly installed inside the side groove (731). A round block (734) is fixedly installed at the end of the torsion spring (733). A connecting rod (735) is fixedly installed on the side of the round block (734) near the connector (72). A limiting arc rod (736) is fixedly connected to the end of the connecting rod (735) near the connector (72). The limiting arc sleeve (732) is fixedly installed on the inner side of the connector (72) near the end of the limiting arc rod (736). The limiting arc rod (736) is inserted into the inner side of the limiting arc sleeve (732). Both the limiting arc rod (736) and the limiting arc sleeve (732) are arranged concentrically with the circular block (734), and a linkage assembly (737) is fixedly connected to a side of the connecting head (71) close to the circular block (734); The linkage assembly (737) comprises a side rail (7371) and a linkage rod (7372), the side rail (7371) is fixedly mounted on a side of the connecting head (71) close to the circular block (734), the linkage rod (7372) is fixedly mounted on an outer side of the circular block (734), a sliding block (7373) is slidably connected inside the side rail (7371), a linkage frame (7374) is fixedly mounted on an outer side of the sliding block (7373), and an outer side of the linkage frame (7374) is in fitting connection with an inner side of the linkage rod (7372).

2. The internal and external liquid tubing adapter for a liquid chromatograph column oven according to claim 1, characterized in that: The limiting assembly (34) comprises a side frame (341) and a limiting hole (342), the side frame (341) is fixedly mounted on one side of the sleeving pipe (31), limiting springs (343) are fixedly mounted on two inner sides of the side frame (341), a movable block (344) is fixedly mounted at an end of each limiting spring (343), a limiting pin (345) is fixedly connected to a side of the movable block (344) away from the limiting spring (343), the limiting pin (345) penetrates through the sleeving pipe (31), the limiting hole (342) is opened on a side of the sleeve (33) close to the limiting pin (345), and an end of the limiting pin (345) is inserted inside the limiting hole (342).

3. The internal and external liquid tubing adapter for a liquid chromatograph column oven according to claim 2, characterized in that: A connecting shaft (346) is fixedly connected to a side of the movable block (344) away from the limiting pin (345), and an end of the connecting shaft (346) penetrates through the side frame (341) and is fixedly mounted with a pull ring (347).

4. The internal and external liquid tubing adapter for a liquid chromatograph column oven according to claim 3, characterized in that: The linkage rod (7372) is entirely in a left-falling shape, an outer end of the linkage frame (7374) is in an isosceles trapezoid shape, and an outer inclined surface of the linkage frame (7374) is in fitting connection with an inner inclined surface of the linkage rod (7372).

5. The internal and external liquid tubing adapter for a liquid chromatograph column oven according to claim 4, characterized in that: Both the overall cross-sectional shape of the sliding block (7373) and the cross-sectional shape of the inner cavity of the side rail (7371) are in a convex shape, and a pressing plate (7375) is fixedly mounted on an outer side of the linkage frame (7374).

6. The internal and external liquid tubing adapter for a liquid chromatograph column oven according to claim 1, characterized in that: The displacement mechanism (2) comprises an outer rail frame (21), the outer rail frame (21) is fixedly mounted on a side of a top of the column temperature chamber body (1) close to the notch (4), a driving motor (22) is fixedly connected to a side of an outer end of the outer rail frame (21), an output end of the driving motor (22) penetrates through the outer rail frame (21) and is fixedly mounted with a screw rod (23), the screw rod (23) is rotatably connected inside the outer rail frame (21), a threaded sleeve (24) is threadedly connected to an outer surface of the screw rod (23), one side of the threaded sleeve (24) is fixedly connected with the cover plate (5), and the cover plate (5) is slidably connected inside the outer rail frame (21).

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