High-pressure liquid chromatographic column sieve plate

Abstract

The utility model discloses a high-pressure liquid chromatographic column sieve plate, which belongs to the technical field of sieve plates and comprises a mounting sleeve, a threaded connector fixed on the upper end face of the mounting sleeve, a filter hole sieve plate arranged in the mounting sleeve and a sieve plate positioning mechanism arranged in the mounting sleeve. The sieve plate positioning mechanism comprises a positioning circular ring, a lifting support plate, a positioning pull rod and an anti-loose extrusion ring; through the sieve plate positioning mechanism, the positioning pull rod can extend out of the threaded connector, and the positioning pull rod extending out of the threaded connector can reduce the interference of the mounting sleeve in the positioning and assembling process of the filter hole sieve plate; when the chromatographic column is connected with the threaded connector, the positioning circular ring and the filter hole sieve plate can be pressed and fixed under the extrusion action of the chromatographic column connector on the anti-loose extrusion ring; according to the mode of synchronously fixing the position of the filter hole sieve plate in the combination process of the chromatographic column and the threaded connector, the tedious steps of unlocking the old filter hole sieve plate and re-locking the new filter hole sieve plate during replacement are omitted.

Description

Technical Field

[0001] The utility model belongs to the technical field of sieve plates, and particularly relates to a sieve plate for a high-pressure liquid chromatography column. Background Technique

[0002] Chromatography is a separation and analysis method, and separation is the core. The chromatography column plays a role in separation in the liquid phase system. The requirements for the chromatography column are high column efficiency, good selectivity, fast analysis speed, etc. It is one of the core components of the liquid chromatography system, and the sieve plate is an even more crucial component among them.

[0003] At present, a chromatography column generally consists of a column tube, a compression cap, a ferrule (sealing ring), a sieve plate (filter), a joint, screws, etc. The sieve plate is generally assembled in the chromatography column. Since the chromatography column has a certain depth for the installation position of the sieve plate, it is not convenient to position and place the sieve plate deep into the sieve plate installation port of the chromatography column, and it is relatively difficult to remove the sieve plate from the deep part of the sieve plate installation port of the chromatography column when replacing the sieve plate. Especially when the sieve plate is clamped tightly with the wall of the installation groove, the removal difficulty is even greater due to the narrow operation space for removal. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sieve plate for a high-pressure liquid chromatography column to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A sieve plate for a high-pressure liquid chromatography column, including an installation sleeve, a threaded connection head is fixed on the upper end surface of the installation sleeve, a filter hole sieve plate is arranged inside the installation sleeve, a sieve plate positioning mechanism is arranged inside the installation sleeve, the sieve plate positioning mechanism includes a positioning ring, a lifting support plate, a positioning pull rod and an anti-loosening extrusion ring. The positioning ring is sleeved and fixed outside the filter hole sieve plate. The lifting support plate is slidably connected inside the installation sleeve. The positioning pull rod is fixed at the upper end surface of the lifting support plate. The anti-loosening extrusion ring is arranged above the lifting support plate inside the installation sleeve. A lifting slider is fixed on the side surface of the lifting support plate.

[0006] It should be noted in the solution that a first positioning hole is opened on the upper end surface of the positioning ring, and the first positioning hole is slidably matched with the positioning pull rod.

[0007] Further, it is worth noting that a second positioning hole is penetrated and opened on the upper end surface of the anti-loosening extrusion ring, and the second positioning hole is slidably matched with the positioning pull rod.

[0008] Furthermore, it should be noted that a lifting chute is opened on the inner side wall of the installation sleeve, and the lifting slider is slidably connected in the lifting chute of the installation sleeve.

[0009] As a preferred embodiment, an anti-falling partition is provided at the lower end of the installation sleeve, and the positioning ring is adapted to the inner cavity of the installation sleeve.

[0010] As a preferred embodiment, a threaded groove is provided inside the threaded connection head, and the threaded groove of the threaded connection head communicates with the upper port of the installation sleeve.

[0011] As a preferred embodiment, the positioning ring is arranged between the anti-loosening extrusion ring and the lifting support plate, and four positioning pull rods are arranged on the upper end surface of the lifting support plate.

[0012] Compared with the prior art, the high-pressure liquid chromatography column sieve plate provided by the present utility model has at least the following beneficial effects:

[0013] Through the provided sieve plate positioning mechanism, the positioning pull rod can extend out of the threaded connection head. The positioning pull rod extending out of the threaded connection head can reduce the interference of the installation sleeve during the positioning and assembly of the filter hole sieve plate. Also, when the chromatography column is connected to the threaded connection head, the extrusion of the chromatography column joint on the anti-loosening extrusion ring can press and fix the positioning ring and the filter hole sieve plate. This method of synchronously fixing the position of the filter hole sieve plate during the combination of the chromatography column and the threaded connection head omits the cumbersome steps of unlocking the old filter hole sieve plate and relocking the new filter hole sieve plate during replacement.

[0014] Through the provided lifting slider and lifting chute, by controlling the positioning pull rod at the top of the installation sleeve, the filter hole sieve plate can be withdrawn, thereby reducing the difficulty of taking the filter hole sieve plate from the deep part of the installation sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 It is a three-dimensional structure diagram of the overall structure of the high-pressure liquid chromatography column sieve plate of the present utility model;

[0017] Figure 2 It is a three-dimensional structure diagram of the cross-sectional structure of the threaded connection head of the high-pressure liquid chromatography column sieve plate of the present utility model;

[0018] Figure 3 It is a three-dimensional structure diagram of the lifting chute structure of the high-pressure liquid chromatography column sieve plate of the present utility model;

[0019] Figure 4 It is a three-dimensional structure diagram of the filter hole sieve plate of the high-pressure liquid chromatography column sieve plate of the present utility model.

[0020] In the figure: 1. Installation sleeve; 2. Threaded connector; 3. Threaded groove; 4. Positioning ring; 5. Filter hole sieve plate; 6. Lifting support plate; 7. Positioning pull rod; 8. Anti-loosening extrusion ring; 9. First positioning hole; 10. Second positioning hole; 11. Lifting chute; 12. Lifting slider; 13. Anti-falling partition board. Specific embodiments

[0021] The following further describes the present utility model in conjunction with embodiments.

[0022] Please refer to Figures 1-4 , the present utility model provides a high-pressure liquid chromatography column sieve plate, including an installation sleeve 1. A threaded connector 2 is fixed on the upper end surface of the installation sleeve 1. A filter hole sieve plate 5 is arranged inside the installation sleeve 1. A sieve plate positioning mechanism is arranged inside the installation sleeve 1. The sieve plate positioning mechanism includes a positioning ring 4, a lifting support plate 6, a positioning pull rod 7 and an anti-loosening extrusion ring 8. The positioning ring 4 is sleeved and fixed outside the filter hole sieve plate 5. The lifting support plate 6 is slidably connected inside the installation sleeve 1. The positioning pull rod 7 is fixed at the upper end surface of the lifting support plate 6. The anti-loosening extrusion ring 8 is arranged above the lifting support plate 6 inside the installation sleeve 1. A lifting slider 12 is fixed on the side surface of the lifting support plate 6.

[0023] Furthermore, as shown in Figure 1 , Figure 2 and Figure 3 , it is specifically noted that a first positioning hole 9 is opened on the upper end surface of the positioning ring 4, and the first positioning hole 9 is slidably matched with the positioning pull rod 7.

[0024] Furthermore, as shown in Figure 3 , it is specifically noted that a second positioning hole 10 is penetrated and opened on the upper end surface of the anti-loosening extrusion ring 8, and the second positioning hole 10 is slidably matched with the positioning pull rod 7.

[0025] This solution has the following working process: When replacing the filter hole sieve plate 5, take out the anti-loosening extrusion ring 8 from the installation sleeve 1, and then pull the lifting support plate 6 upward from the positioning pull rod 7. The positioning ring 4 outside the filter hole sieve plate 5 is sleeved on the positioning pull rod 7. In this way, by controlling the positioning pull rod 7 at the top position of the installation sleeve 1, the filter hole sieve plate 5 can be drawn out, thereby reducing the difficulty of taking the filter hole sieve plate 5 from the deep part of the installation sleeve 1.

[0026] According to the above working process, it can be known that by controlling the positioning pull rod 7 at the top position of the installation sleeve 1, the filter hole sieve plate 5 can be drawn out, thereby reducing the difficulty of taking the filter hole sieve plate 5 from the deep part of the installation sleeve 1.

[0027] Furthermore, as shown in Figure 1 , Figure 2 and Figure 4As shown, it is worth specifically explaining that a lifting chute 11 is formed on the inner sidewall of the mounting sleeve 1, and a lifting slider 12 is slidably connected in the lifting chute 11 of the mounting sleeve 1.

[0028] Furthermore, as Figure 4 shown, it is worth specifically explaining that an anti-falling partition 13 is provided at the lower end of the mounting sleeve 1, and the positioning ring 4 is adapted to the inner cavity of the mounting sleeve 1.

[0029] Furthermore, as Figure 1 shown, it is worth specifically explaining that a threaded groove 3 is formed inside the threaded connection head 2, and the threaded groove 3 of the threaded connection head 2 communicates with the upper port of the mounting sleeve 1.

[0030] Furthermore, as Figure 1 shown, it is worth specifically explaining that the positioning ring 4 is arranged between the anti-loosening extrusion ring 8 and the lifting support plate 6. Four positioning pull rods 7 are arranged on the upper end surface of the lifting support plate 6. When installing the filter hole sieve plate 5, since the lifting support plate 6 is slidably connected to the lifting chute 11 of the mounting sleeve 1 through the lifting slider 12, the positioning pull rod 7 can extend out of the threaded connection head 2. The positioning ring 4 on the outer circle of the filter hole sieve plate 5 is inserted into the positioning pull rod 7 through the first positioning hole 9. The positioning pull rod 7 extending out of the threaded connection head 2 can reduce the interference of the mounting sleeve 1 during the positioning and assembly of the filter hole sieve plate 5. Subsequently, the anti-loosening extrusion ring 8 is also assembled on the positioning pull rod 7. When the chromatographic column is connected to the threaded connection head 2, the extrusion effect of the chromatographic column joint on the anti-loosening extrusion ring 8 can press and fix the positioning ring 4 and the filter hole sieve plate 5. This method of synchronously fixing the position of the filter hole sieve plate 5 during the combination of the chromatographic column and the threaded connection head 2 omits the cumbersome steps of unlocking the old filter hole sieve plate 5 and relocking the new filter hole sieve plate 5 during replacement.

[0031] In summary: The positioning pull rod 7 can extend out of the threaded connection head 2. The positioning pull rod 7 extending out of the threaded connection head 2 can reduce the interference of the mounting sleeve 1 during the positioning and assembly of the filter hole sieve plate 5. Also, when the chromatographic column is connected to the threaded connection head 2, the extrusion effect of the chromatographic column joint on the anti-loosening extrusion ring 8 can press and fix the positioning ring 4 and the filter hole sieve plate 5. This method of synchronously fixing the position of the filter hole sieve plate 5 during the combination of the chromatographic column and the threaded connection head 2 omits the cumbersome steps of unlocking the old filter hole sieve plate 5 and relocking the new filter hole sieve plate 5 during replacement; by controlling the positioning pull rod 7 at the top position of the mounting sleeve 1, the filter hole sieve plate 5 can be withdrawn, thereby reducing the difficulty of taking the filter hole sieve plate 5 from the deep part of the mounting sleeve 1.

[0032] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A high pressure liquid chromatography column sieve plate, comprising a mounting sleeve (1), characterized in that: A threaded connector (2) is fixed to the upper end surface of the mounting sleeve (1), a filter sieve plate (5) is arranged inside the mounting sleeve (1), a sieve plate positioning mechanism is arranged inside the mounting sleeve (1), and the sieve plate positioning mechanism comprises a positioning ring (4), a lifting support plate (6), a positioning rod (7) and an anti-loosening extrusion ring (8), the positioning ring (4) is sleeved and fixed on the outside of the filter sieve plate (5), the lifting support plate (6) is slidably connected to the inside of the mounting sleeve (1), the positioning rod (7) is fixed to the upper end surface of the lifting support plate (6), the anti-loosening extrusion ring (8) is arranged above the lifting support plate (6) in the mounting sleeve (1), and a lifting slider (12) is fixed to the side surface of the lifting support plate (6).

2. The high pressure liquid chromatography column sieve plate according to claim 1, characterized in that: The upper end surface of the positioning ring (4) is provided with a first positioning hole (9), and the first positioning hole (9) is slidably matched with the positioning rod (7).

3. The high pressure liquid chromatography column sieve plate according to claim 2, characterized in that: A second positioning hole (10) is formed through the upper end surface of the anti-loosening extrusion ring (8), and the second positioning hole (10) is slidably matched with the positioning pull rod (7).

4. The high pressure liquid chromatography column sieve plate according to claim 3, characterized in that: The inner side wall of the installation sleeve (1) is provided with a lifting groove (11), and the lifting slider (12) is slidably connected in the lifting groove (11) of the installation sleeve (1).

5. The high pressure liquid chromatography column sieve plate according to claim 4, characterized in that: The lower end of the installation sleeve (1) is provided with an anti-falling baffle (13), and the positioning ring (4) is adapted to the inner cavity of the installation sleeve (1).

6. The high pressure liquid chromatography column sieve plate according to claim 5, characterized in that: A thread groove (3) is provided inside the threaded connector (2), and the thread groove (3) of the threaded connector (2) is communicated with the upper end of the mounting sleeve (1).

7. The high pressure liquid chromatography column sieve plate according to claim 6, characterized in that: The positioning ring (4) is arranged between the anti-loosening extrusion ring (8) and the lifting support plate (6), and four positioning rods (7) are arranged on the upper end surface of the lifting support plate (6).

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