A medium pressure liquid chromatography preparative column frit

Abstract

The utility model relates to the technical field of analytical chemistry, especially a medium pressure liquid chromatography preparation column spray head. The utility model provides a medium pressure liquid chromatography preparation column spray head, including medium pressure liquid chromatography preparation column spray head, mounting ring and locking ring etc.

Description

Technical Field

[0001] This utility model relates to the field of analytical chemistry technology, and in particular to a nozzle for a medium-pressure liquid chromatography preparative column. Background Technology

[0002] The nozzle of a medium-pressure liquid chromatography preparative column is a key precision component at the inlet of the column. Its main function is to uniformly and stably distribute the mobile phase and sample solution onto the packing bed of the column to ensure a high-efficiency and high-resolution separation process.

[0003] Traditional column head connection methods mostly use manual thread tightening or ferrule sealing. The operation relies on human experience and is prone to problems such as uneven tightening force, poor sealing or over-tightening leading to interface damage. This not only affects the reliability and repeatability of the connection, but also easily causes leakage or column bed disturbance.

[0004] To address the aforementioned issues, there is a need for a convenient and easy-to-lock medium-pressure liquid chromatography preparative column nozzle. Utility Model Content

[0005] To overcome the drawbacks of manual tightening that relies on human experience, this invention provides a medium-pressure liquid chromatography preparative column nozzle.

[0006] The technical solution of this utility model is as follows: A medium-pressure liquid chromatography preparative column nozzle includes a medium-pressure liquid chromatography preparative column nozzle, a mounting ring, a locking ring, a gear, a protective frame, a slider, a moving block, a docking part, and a threaded ring. The mounting ring is installed on the top of the medium-pressure liquid chromatography preparative column nozzle, and a locking ring is rotatably connected inside the mounting ring. A gear is provided on the locking ring. A protective frame is provided on the mounting ring, and an arc-shaped groove is opened on the protective frame. A slider is slidably connected to the arc-shaped groove. A moving block is connected to the bottom of the slider, and the moving block contacts and cooperates with the gear. A docking part is placed on the top of the medium-pressure liquid chromatography preparative column nozzle, and a threaded ring is slidably connected to the docking part.

[0007] Furthermore, it also includes a positioning plate, with a positioning plate on the docking part and a positioning groove on the protective frame, and the positioning plate and the positioning groove are engaged.

[0008] Furthermore, it also includes a pin, with a fixing hole on the protective frame, into which the pin is engaged.

[0009] Furthermore, it also includes a pull ring, with a pull ring at the top of the pin.

[0010] Furthermore, the slider has a fixing hole with the same size as the pin.

[0011] Furthermore, the positioning plate is L-shaped.

[0012] The beneficial effects of this utility model are as follows: By pushing the slider, the gear transmission mechanism can automatically complete the thread locking, without the need for tools or manual experience to tighten. This avoids poor sealing or interface damage caused by uneven force, significantly improving the consistency and repeatability of the connection. The progressive tightening method of the threaded ring and locking ring ensures uniform force and effectively prevents leakage. At the same time, after the slider slides into place, it achieves mechanical locking through the pin, which can effectively resist vibration and pressure fluctuations during system operation, prevent the connection from loosening, and improve the operational safety and stability under high pressure conditions. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the mounting ring, slider, and docking parts of this utility model.

[0015] Figure 3 This is an exploded view of the mounting ring and the docking component of this utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the mounting ring, locking ring, gear, and other components of this utility model.

[0017] In the attached diagram: 1: Medium-pressure liquid chromatography preparative column nozzle, 2: Mounting ring, 3: Locking ring, 4: Gear, 5: Protective frame, 6: Arc groove, 7: Slider, 8: Actuating block, 9: Connecting part, 10: Threaded ring, 11: Positioning plate, 12: Positioning groove, 13: Fixing hole, 14: Pin, 15: Pull ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: A nozzle for a medium-pressure liquid chromatography preparative column, such as... Figures 1-4As shown, the assembly includes a medium-pressure liquid chromatography (LC) preparative column nozzle 1, a mounting ring 2, a locking ring 3, a gear 4, a protective frame 5, a slider 7, a lever block 8, a docking part 9, a threaded ring 10, a positioning plate 11, a pin 14, and a pull ring 15. The mounting ring 2 is mounted on the top of the LC preparative column nozzle 1. A locking ring 3 is rotatably connected inside the mounting ring 2, used to engage with the threaded ring 10 on the docking part 9 for quick locking or unlocking. The rotational action securely fixes the docking part 9 to the nozzle, ensuring a leak-proof seal at the connection. A gear 4 is mounted on the locking ring 3, and a protective frame 5 is mounted on the mounting ring 2 to protect the internal transmission components such as the gear 4. An arc-shaped groove 6 is formed on the protective frame 5, and a slider 7 is slidably connected to the arc-shaped groove 6. A fixing hole 13, matching the size of the pin 14, is formed on the slider 7. A lever block 8 is connected to the bottom of the slider 7, and the lever block 8 engages with the gear 4. When the slider 7 moves along the arc groove 6, the actuating block 8 pushes the gear 4 to rotate, thereby realizing the automatic rotation of the locking ring 3, simplifying the manual tightening operation. The top of the medium-pressure liquid chromatography preparation column nozzle 1 is equipped with a docking part 9 for connecting external pipelines or connectors. A threaded ring 10 is slidably connected to the docking part 9. The docking part 9 is equipped with a positioning plate 11, which is L-shaped and is used to engage with the positioning groove 12 on the protective frame 5 during docking, so as to realize the quick positioning of the docking part 9 and prevent mis-assembly. The protective frame 5 is provided with a positioning groove 12, and the positioning plate 11 engages with the positioning groove 12. The protective frame 5 is provided with a fixing hole 13, and a pin 14 is engaged in the fixing hole 13 to lock the position of the slider 7, preventing the slider 7 from moving due to vibration during transportation or non-working state and accidentally triggering the locking or loosening action, thus improving safety. The top of the pin 14 is provided with a pull ring 15.

[0020] During installation, the docking piece 9 is inserted into the top of the nozzle 1 of the medium-pressure liquid chromatography preparation column. The threaded ring 10 on the docking piece 9 then enters the locking area. At this time, the positioning plate 11 at the front end of the docking piece 9 is precisely embedded in the positioning groove 12 on the protective frame 5, achieving axial positioning and circumferential anti-rotation, ensuring accurate connection. Subsequently, the slider 7 is pushed along the arc groove 6 on the protective frame 5. The actuating block 8 connected to the bottom of the slider 7 moves accordingly and acts on the gear 4, causing the gear 4 to rotate. Since the gear 4 is fixed on the locking ring 3, the locking ring 3 rotates synchronously, and its internal thread gradually meshes with the threaded ring 10 on the outer ring of the docking piece 9, thereby... The threaded ring 10 is screwed down to achieve a sealed connection. When the slider 7 slides to the end of the arc groove 6, the through hole on the slider 7 is aligned with the fixing hole 13 on the protective frame 5. At this time, the pin 14 is inserted into the fixing hole 13 to complete the mechanical locking of the locking state, preventing the slider 7 from retracting or the connection from loosening due to vibration or pressure fluctuation. The top of the pin 14 is provided with a pull ring 15, which makes it easy to pull out the pin 14 during disassembly. During disassembly, the pin 14 is first pulled out through the pull ring 15, the slider 7 is slid in the opposite direction, and the actuating block 8 drives the gear 4 to rotate in the opposite direction, so that the locking ring 3 is disengaged from the threaded ring 10, and the docking part 9 can be removed to complete the disassembly operation.

[0021] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A nozzle for a medium-pressure liquid chromatography preparative column, characterized in that, The medium-pressure liquid chromatography preparation column nozzle (1), mounting ring (2), locking ring (3), gear (4), protective frame (5), slider (7), actuating block (8), docking part (9) and threaded ring (10) are included. The mounting ring (2) is installed on the top of the medium-pressure liquid chromatography preparation column nozzle (1). The inner ring of the mounting ring (2) is rotatably connected to the locking ring (3). The outer ring of the locking ring (3) is fixedly connected to the gear (4). The protective frame (5) is installed on the top of the mounting ring (2). The top of the protective frame (5) has an arc groove (6). The slider (7) is slidably connected to the arc groove (6). The bottom of the slider (7) is fixedly connected to the actuating block (8). The actuating block (8) is in contact with the gear (4). The docking part (9) is placed on the top of the medium-pressure liquid chromatography preparation column nozzle (1). The outer ring of the docking part (9) is slidably connected to the threaded ring (10).

2. The medium-pressure liquid chromatography preparative column nozzle according to claim 1, characterized in that, It also includes a positioning plate (11), a positioning plate (11) is provided on the docking part (9), and a positioning groove (12) is provided on the protective frame (5). The positioning plate (11) and the positioning groove (12) are engaged and matched.

3. The medium-pressure liquid chromatography preparative column nozzle according to claim 2, characterized in that, It also includes a pin (14), and a fixing hole (13) is provided on the top left side of the protective frame (5), and the pin (14) is engaged in the fixing hole (13).

4. The medium-pressure liquid chromatography preparative column nozzle according to claim 3, characterized in that, It also includes a pull ring (15), and the top of the pin (14) is fixedly connected to the pull ring (15).

5. The medium-pressure liquid chromatography preparative column nozzle according to claim 4, characterized in that, The slider (7) has a fixing hole (13) with the same size as the pin (14).

6. The medium-pressure liquid chromatography preparative column nozzle according to claim 5, characterized in that, The positioning plate (11) is L-shaped.

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