Pretreatment device for liquid chromatograph

Abstract

The pretreatment device for the liquid chromatograph comprises a supporting bottom frame and a movable placing frame, a second guide plate is installed on the inner side of the supporting bottom frame, two first guide plates are installed at the upper end of the second guide plate, a filter box is installed on the outer sides of the first guide plates, and the movable placing frame is installed on the lower end of the second guide plate. Three filter element bodies are rotationally connected to the inner side of the upper end of the second guide plate, a movable placement frame is installed among the three filter element bodies, a flow guide pipe is rotationally connected to the inner side of the middle of the movable placement frame, a liquid collection through groove is formed in the upper end face of the flow guide pipe, and the flow guide pipe is fixedly connected with the filter box through a connecting frame. And a collecting box is mounted at the bottom end of the flow guide pipe. The multi-stage filtering device has the advantages that mixed liquid analyzed and identified by the liquid chromatograph is subjected to multi-stage filtering, so that the influence of impurity particles on an analysis and identification result is effectively avoided, and the filter element is convenient to replace in the filtering process.

Description

Technical Field

[0001] The utility model relates to the field of chromatographs, in particular to a pretreatment device for liquid chromatographs. Background Art

[0002] An instrument that uses the difference in the distribution ratio of a mixture between liquid and solid or between two immiscible liquids to first separate the mixture and then analyze and identify it. High performance liquid chromatography is an instrument that applies the principle of high performance liquid chromatography and is mainly used for analyzing high-boiling point, non-volatile, thermally unstable and large molecular weight organic compounds. High performance liquid chromatography is widely used in life sciences, food sciences, pharmaceutical research and environmental research. Before using the liquid chromatograph, the mixed liquid needs to be pretreated.

[0003] In the prior art, the mixed liquid contains impurity particles, and the liquid chromatograph is easily affected by the impurity particles when analyzing and identifying the mixed liquid, resulting in inaccurate analysis results and inconvenience in performing multi-stage filtration on the mixed liquid. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a pretreatment device for a liquid chromatograph. In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A pretreatment device for a liquid chromatograph comprises a supporting base and a movable placement frame, a second guide plate is installed on the inner side of the supporting base, two first guide plates are installed on the upper end of the second guide plate, a filter box is installed on the outer side of the first guide plate, three filter element bodies are rotatably connected to the inner side of the upper end of the second guide plate, a movable placement frame is installed between the three filter element bodies, a guide tube is rotatably connected to the inner side of the middle part of the movable placement frame, a liquid collecting groove is provided on the upper end surface of the guide tube, the guide tube is fixedly connected to the filter box by a connecting frame, and a collection box is installed at the bottom end of the guide tube.

[0006] Preferably, two limit rings are fixedly installed on one side of the filter box, and three positioning grooves are provided on the outer side of one end of the movable placement frame, a positioning rod is installed on the inner side of one of the positioning grooves, a support spring is provided on the upper end of the positioning rod, and a mounting sleeve is installed on the outer side of the support spring.

[0007] Preferably, the bottom end of the second guide plate passes through the filter box and the support base, the support base and the filter box are fixedly connected via the second guide plate, and the first guide plate and the second guide plate are both fixedly connected to the filter box.

[0008] Preferably, one end of the movable placement rack passes through the filter box and the second guide plate and is plugged into the inner sides of the two limiting clamps, and the movable placement rack is rotatably connected to the filter box and the guide pipe.

[0009] Preferably, the mounting sleeve is fixedly connected to the filter box, the bottom end of the positioning rod passes through the mounting sleeve and is inserted into the inner side of one of the positioning slots, and the upper end of the positioning rod is connected to the mounting sleeve via a support spring.

[0010] Preferably, the upper end of the guide tube passes through the connecting frame and is inserted into the inner side of the middle part of the movable placement frame. The guide tube is connected to the filter box through a liquid collecting groove. The movable placement frame is snap-fitted and installed with three filter element bodies. The filtering accuracy of the three filter element bodies increases successively.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. Place the mixed liquid used in the liquid chromatograph inside the filter box, so that the mixed liquid is guided by the first guide plate and then filtered through the filter element body, and then enters the inner side of the guide tube through the liquid collecting groove, so that the collection box collects the filtered mixed liquid. The movable placement frame rotates inside the two limit clamps and adjusts the position of the filter element body. The filtration accuracy of the three filter element bodies increases in sequence, and then the three filter element bodies can perform multi-stage filtration operations on the mixed liquid in sequence;

[0013] 2. The positioning rod can be snap-connected and installed with the movable placement frame under the support of the support spring, so as to facilitate the stability of the movable placement frame during filtration and ensure the accurate adjustment of the filter element body. The bottom end of the second guide plate passes through the support base and the filter box, so that the filter element body can be replaced and repaired through the second guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the rear side of the utility model as a whole;

[0016] Figure 3 It is a schematic cross-sectional structure diagram of the entire utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter box of the utility model;

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the movable placement rack of the utility model.

[0019] In the figure: 1. Support base; 2. Filter box; 3. Limiting clamp; 4. Movable placement frame; 5. Positioning groove; 6. Mounting sleeve; 7. Positioning plug rod; 8. Collection box; 9. Guide pipe; 10. Connecting frame; 11. Support spring; 12. Filter element body; 13. First guide plate; 14. Second guide plate; 15. Liquid collection trough. DETAILED DESCRIPTION

[0020] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0021] like Figures 1 to 5 As shown, a pretreatment device for a liquid chromatograph described in the present invention includes a supporting base 1 and a movable placement rack 4, a second guide plate 14 is installed on the inner side of the supporting base 1, two first guide plates 13 are installed on the upper end of the second guide plate 14, a filter box 2 is installed on the outer side of the first guide plate 13, the bottom end of the second guide plate 14 passes through the filter box 2 and the supporting base 1, the supporting base 1 and the filter box 2 are fixedly connected through the second guide plate 14, the first guide plate 13 and the second guide plate 14 are both fixedly connected to the filter box 2, and three filter element bodies 12 are rotatably connected to the inner side of the upper end of the second guide plate 14, which facilitates the replacement and maintenance of the filter element body 12 during the rotation of the movable placement rack 4 through the second guide plate 14.

[0022] As the preferred technical solution of this embodiment, Figure 3 and Figure 4 As shown, a movable placement rack 4 is installed between the three filter element bodies 12, and the inner side of the middle of the movable placement rack 4 is rotatably connected to the guide pipe 9, the upper end face of the guide pipe 9 is provided with a liquid collecting groove 15, the guide pipe 9 and the filter box 2 are fixedly connected through the connecting rack 10, and the bottom end of the guide pipe 9 is installed with a collecting box 8, the upper end of the guide pipe 9 passes through the connecting rack 10 and is plugged into the inner side of the middle of the movable placement rack 4, the guide pipe 9 and the filter box 2 are connected through the liquid collecting groove 15, the movable placement rack 4 and the three filter element bodies 12 are all snap-fitted and installed, the filtration accuracy of the three filter element bodies 12 increases successively, and multi-stage filtration of the mixed liquid can be achieved by rotating and adjusting the filter element body 12.

[0023] As the preferred technical solution of this embodiment, Figures 1 to 4As shown, two limit snap rings 3 are fixedly installed on one side of the filter box 2, one end of the movable placement rack 4 passes through the filter box 2 and the second guide plate 14 and is inserted into the inner side of the two limit snap rings 3, and the movable placement rack 4 is rotatably connected to the filter box 2 and the guide pipe 9. The two limit snap rings 3 are used to facilitate the positioning of the movable placement rack 4 and maintain the stability of the rotation of the movable placement rack 4.

[0024] As the preferred technical solution of this embodiment, Figure 1 and Figure 3 As shown, three positioning grooves 5 are provided on the outside of one end of the movable placement rack 4, and a positioning rod 7 is installed on the inner side of one of the positioning grooves 5, and a supporting spring 11 is provided on the upper end of the positioning rod 7. A mounting sleeve 6 is installed on the outer side of the supporting spring 11, and the mounting sleeve 6 is fixedly connected to the filter box 2. The bottom end of the positioning rod 7 passes through the mounting sleeve 6 and is inserted into the inner side of one of the positioning grooves 5. The upper end of the positioning rod 7 is connected to the mounting sleeve 6 through the supporting spring 11, so that the positioning rod 7 can be clamped and installed with the movable placement rack 4 under the support of the supporting spring 11, thereby facilitating the maintenance of the stability of the movable placement rack 4 during filtration.

[0025] Working principle: The three filter element bodies 12 are clamped and fixed on the surface of the movable placement rack 4. One end of the movable placement rack 4 passes through the filter box 2 and the second guide plate 14 and is inserted into the inner side of the two limiting clamps 3 to realize the installation of the movable placement rack 4, so that the movable placement rack 4 and the filter box 2 are rotatably connected through the two limiting clamps 3;

[0026] The mixed liquid used in the liquid chromatograph is placed inside the filter box 2, so that the mixed liquid is guided by the first guide plate 13 and then passes through one of the filter core bodies 12 for filtration, and then enters the inner side of the guide tube 9 through the liquid collecting groove 15, so that the collection box 8 collects the filtered mixed liquid. After the first filtration, the movable placement frame 4 is rotated so that the movable placement frame 4 rotates inside the two limit clamps 3 and adjusts the position of the filter core body 12;

[0027] The filtration accuracy of the three filter element bodies 12 increases successively, and the three filter element bodies 12 can perform multi-stage filtration operations on the mixed liquid in turn. The upper end of the positioning rod 7 is connected to the mounting sleeve 6 through the support spring 11, so that the positioning rod 7 can be clamped and installed with the movable placement rack 4 under the support of the support spring 11, thereby facilitating the maintenance of the movable placement rack 4 during filtration and ensuring the accurate adjustment of the filter element body 12. The bottom end of the second guide plate 14 passes through the support base 1 and the filter box 2, so that the filter element body 12 can be replaced and repaired through the second guide plate 14.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A pretreatment device for a liquid chromatograph, comprising a supporting frame (1) and a movable placement frame (4), characterized in that: A second guide plate (14) is installed on the inner side of the supporting base frame (1), two first guide plates (13) are installed on the upper end of the second guide plate (14), a filter box (2) is installed on the outer side of the first guide plate (13), three filter element bodies (12) are rotatably connected to the inner side of the upper end of the second guide plate (14), a movable placement rack (4) is installed between the three filter element bodies (12), a guide pipe (9) is rotatably connected to the inner side of the middle part of the movable placement rack (4), a liquid collecting groove (15) is provided on the upper end surface of the guide pipe (9), the guide pipe (9) is fixedly connected to the filter box (2) through a connecting rack (10), and a collection box (8) is installed at the bottom end of the guide pipe (9).

2. A pretreatment device for liquid chromatograph according to claim 1, characterized in that: Two limiting clamps (3) are fixedly installed on one side of the filter box (2), and three positioning grooves (5) are provided on the outer side of one end of the movable placement frame (4), a positioning rod (7) is installed on the inner side of one of the positioning grooves (5), a support spring (11) is provided on the upper end of the positioning rod (7), and a mounting sleeve (6) is installed on the outer side of the support spring (11).

3. A pretreatment device for liquid chromatograph according to claim 1, characterized in that: The bottom end of the second guide plate (14) passes through the filter box (2) and the supporting base (1); the supporting base (1) and the filter box (2) are fixedly connected via the second guide plate (14); and both the first guide plate (13) and the second guide plate (14) are fixedly connected to the filter box (2).

4. The pretreatment device for liquid chromatograph according to claim 1, characterized in that: One end of the movable placement rack (4) passes through the filter box (2) and the second guide plate (14) and is plugged into the inner sides of the two limiting clamps (3). The movable placement rack (4) is rotatably connected to the filter box (2) and the guide pipe (9).

5. The pretreatment device for liquid chromatograph according to claim 2, characterized in that: The mounting sleeve (6) is fixedly connected to the filter box (2), the bottom end of the positioning rod (7) passes through the mounting sleeve (6) and is inserted into the inner side of one of the positioning slots (5), and the upper end of the positioning rod (7) is connected to the mounting sleeve (6) via a support spring (11).

6. A pretreatment device for liquid chromatograph according to claim 1, characterized in that: The upper end of the guide tube (9) passes through the connecting frame (10) and is plugged into the inner side of the middle part of the movable placement frame (4). The guide tube (9) is connected to the filter box (2) through the liquid collecting groove (15). The movable placement frame (4) and the three filter element bodies (12) are all snap-fitted and installed. The filtering accuracy of the three filter element bodies (12) increases in sequence.

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