Magnetic frame based on circular magnet

Abstract

The magnetic frame based on the circular magnet comprises a clamp disc, the circular magnet and a base, the clamp disc is located above the circular magnet, a plurality of clamps distributed at equal intervals are arranged on the circumferential wall of the clamp disc, and a first iron sheet is pasted to the middle of the bottom of the clamp disc; the base is located below the circular magnet, a plurality of positioning holes distributed around the center of the base are formed in the edge of the base, the positioning holes and the clamps are distributed in a one-to-one correspondence mode, the sample tube is clamped through the clamps and the positioning holes, and a second iron sheet is pasted to the center of the base; the clamp disc is fixed above the circular magnet through the first iron sheet, the base is fixed below the circular magnet through the second iron sheet, and the centers of the clamp disc, the circular magnet and the base are aligned; the utility model has the advantages of higher utilization rate, uniform axial magnetic field intensity distribution and fast and efficient separation process.

Description

Technical Field

[0001] The utility model belongs to the technical field of sample pre-processing, and in particular relates to a magnetic frame based on a circular magnet. Background Art

[0002] Magnetic solid phase extraction (M-SPE) is a dispersed solid phase extraction technology that uses magnetic or magnetizable materials as adsorbents. In the M-SPE process, the magnetic adsorbent is dispersed in the sample solution, and the target analyte is adsorbed to the surface of the adsorbent. After the extraction is completed, under the action of the external magnetic field, the target analyte is separated from the solution along with the adsorbent, and then eluted with a suitable solvent. Finally, the content of the target object is detected using instruments and equipment.

[0003] The magnetic rack can separate magnetic adsorbents in multiple sample tubes in batches, helping researchers improve experimental efficiency. At present, common magnetic racks use long strip magnets with a sample tube placement hole on each side of the magnet. The specifications are fixed and the usage scenarios are single. To place more sample tubes, more magnets are needed, and the magnets need to be separated by a certain distance to avoid being sucked together. This increases the production cost of the magnetic rack and increases the volume of the magnetic rack. At the same time, the magnetism of different magnets may not be completely consistent, the magnetic absorption efficiency is different, and the separation speed is not synchronized. In addition, after the magnetic absorption is completed, a pipette or straw is required to absorb the remaining solution in the tube, which reduces the efficiency of the experimental operation. Utility Model Content

[0004] The purpose of the utility model is to provide a magnetic rack based on circular magnets to address the problems of single usage scenario, high production cost, large volume, asynchronous separation speed and low experimental operation efficiency of common magnetic racks. Compared with long strip magnets, sample tubes can be placed in a circle around the circular magnets, which has higher utilization rate, uniform distribution of axial magnetic field strength, and fast and efficient separation process.

[0005] The purpose of the utility model is achieved through the following technical scheme. The magnetic frame based on the circular magnet includes a clamp disk, a circular magnet and a base, wherein the clamp disk is located above the circular magnet, and a plurality of clamps distributed at equal intervals are provided on the circumferential wall of the clamp disk, and a first iron sheet is pasted in the middle of the bottom of the clamp disk; the base is located below the circular magnet, and a plurality of positioning holes distributed in a surrounding manner along the center of the base are provided on the edge of the base, and the positioning holes are distributed in a one-to-one correspondence with the clamps, and the sample tubes are clamped by the clamps and the positioning holes, and a second iron sheet is pasted in the center of the base; the clamp disk is fixed to the top of the circular magnet by the first iron sheet, and the base is fixed to the bottom of the circular magnet by the second iron sheet, and the centers of the clamp disk, the circular magnet and the base are aligned.

[0006] The beneficial effects of the utility model are as follows: compared with the prior art, 1. a circular magnet is provided, and sample tubes can be placed in a circle around the magnet, which has a higher utilization rate; the axial magnetic field intensity is evenly distributed, and the magnetic separation speed is synchronized; 2. sample tubes of different sizes and quantities can be placed by replacing the clamp plate, the base, and adjusting the diameter and number of the circular magnets; 3. the sample tubes can be fixed by the clamp, and the magnetic rack can be directly turned over to pour out the solution after the magnetic attraction is completed, thereby improving the experimental operation efficiency.

[0007] Preferably, the clamp is a U-shaped clip, the back of the clamp is fixed on the circumferential wall of the clamp plate, and the opening of the clamp faces outside the circumferential wall of the clamp plate; the above structure is arranged to facilitate clamping and taking and placing of sample tubes.

[0008] Preferably, the fixture plate and the base are both made of plastic material by injection molding or 3D printing, which has the advantages of lower cost and easier molding.

[0009] Preferably, the circular magnet is provided in single or multiple form, and the multiple circular magnets are sequentially spliced ​​along the center of the height direction of the circular magnet; when multiple circular magnets are provided, when the length of the sample tube is longer, at this time, multiple circular magnets can be sequentially spliced ​​together, which has stronger versatility.

[0010] Preferably, the circular magnet is a solid magnet or a magnet with a hole in the center; the selection range of the magnet is wider.

[0011] Preferably, the circular magnet is a neodymium iron boron magnet, which has the advantages of high magnetization strength, excellent mechanical properties, corrosion resistance and high cost performance.

[0012] Preferably, the first iron sheet is adhered to the clamp disk by using a first double-sided tape, and the second iron sheet is adhered to the base by using a second double-sided tape; the diameter of the first iron sheet and the diameter of the second iron sheet are both less than or equal to the diameter of the circular magnet, and when the circular magnet is a magnet with a hole in the center, the diameter of the first iron sheet and the diameter of the second iron sheet are both larger than the diameter of the center hole of the circular magnet; the above-mentioned structure is arranged to facilitate the connection between the clamp disk, the base and the circular magnet.

[0013] Preferably, the first double-sided tape and the second double-sided tape are both acrylic double-sided tapes, the size of the first double-sided tape is consistent with the size of the first iron sheet, and the size of the second double-sided tape is consistent with the size of the second iron sheet; by using acrylic double-sided tape, it has the advantages of strong adhesion and good toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the magnetic frame of the utility model.

[0015] Figure 2 It is a schematic diagram of the explosion structure of the magnetic frame of the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the clamp plate of the utility model.

[0017] Figure 4 It is a schematic diagram of the application structure of the utility model.

[0018] The numbers in the accompanying drawings are: 1. clamp plate; 2. round magnet; 3. base; 4. clamp; 5. first iron sheet; 6. positioning hole; 7. second iron sheet; 8. first double-sided tape; 9. second double-sided tape; 10. sample tube. DETAILED DESCRIPTION

[0019] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figures 1 to 4 As shown, the utility model includes a clamp disk 1, a circular magnet 2 and a base 3, and is characterized in that: the clamp disk 1 is located above the circular magnet 2, a plurality of clamps 4 distributed at equal intervals are provided on the circumferential wall of the clamp disk 1, and a first iron sheet 5 is pasted in the middle of the bottom of the clamp disk 1; the base 3 is located below the circular magnet 2, a plurality of positioning holes 6 distributed in a surrounding manner along the center of the base 3 are provided on the edge of the base 3, the positioning holes 6 are distributed in a one-to-one correspondence with the clamps 4, and the sample tube 10 is clamped by the clamps 4 and the positioning holes 6, and a second iron sheet 7 is pasted in the center of the base 3; the clamp disk 1 is fixed to the top of the circular magnet 2 by the first iron sheet 5, and the base 3 is fixed to the bottom of the circular magnet 2 by the second iron sheet 7, and the centers of the clamp disk 1, the circular magnet 2 and the base 3 are aligned.

[0020] The clamp 4 is a U-shaped buckle, the back of the clamp 4 is fixed on the circumferential wall of the clamp plate 1 , and the opening of the clamp 4 faces the outside of the circumferential wall of the clamp plate 1 .

[0021] The fixture plate 1 and the base 3 are both made of plastic by injection molding or 3D printing.

[0022] The circular magnet 2 is provided in single or multiple forms, and the multiple circular magnets 2 are sequentially spliced ​​along the center of the height direction of the circular magnet 2 .

[0023] The circular magnet 2 is a solid magnet or a magnet with a hole in the center.

[0024] The circular magnet 2 is a neodymium iron boron magnet.

[0025] The first iron sheet 5 is adhered to the fixture plate 1 by using the first double-sided tape 8, and the second iron sheet 7 is adhered to the base 3 by using the second double-sided tape 9; the diameter of the first iron sheet 5 and the diameter of the second iron sheet 7 are both less than or equal to the diameter of the circular magnet 2, and when the circular magnet 2 is a magnet with a hole in the center, the diameter of the first iron sheet 5 and the diameter of the second iron sheet 7 are both greater than the diameter of the center hole of the circular magnet 2.

[0026] The first double-sided adhesive tape 8 and the second double-sided adhesive tape 9 are both acrylic double-sided adhesive tapes. The size of the first double-sided adhesive tape 8 is consistent with the size of the first iron sheet 5 , and the size of the second double-sided adhesive tape 9 is consistent with the size of the second iron sheet 7 .

[0027] The working principle and use process of the utility model are as follows: first, select a fixture plate 1 and a base 3 of the required specifications, place the base 3 horizontally, with the side containing the second iron sheet 7 facing upward, and then place the circular magnet 2 above the base 3. Due to the effect of magnetic attraction, the base 3 can be firmly fixed below the circular magnet 2. The circular magnet 2 is translated to align the centers of the base 3 and the circular magnet 2. Place the fixture plate 1 with the side containing the first iron sheet 5 facing downward above the circular magnet 2. Also due to the effect of magnetic attraction, the fixture plate 1 can be firmly fixed. On the circular magnet 2, move and rotate the clamp disk 1 horizontally so that its center is aligned with the center of the circular magnet 2, and the positions of the clamp 4 on the clamp disk 1 and the positioning hole 6 on the base 3 correspond one by one; take the extracted sample tube 10, put it into the clamp 4 and clamp it, move it vertically so that part of its bottom is embedded in the positioning hole 6, and keep the sample tube 10 vertical; after the sample solution becomes transparent, open the cover of the sample tube 10, hold the magnetic rack with both hands, pour out the solution, move the sample tube 10 out of the positioning hole 6, and take it out of the clamp 4 for the next step.

[0028] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A magnetic frame based on a circular magnet, comprising a fixture plate (1), a circular magnet (2) and a base (3), characterized in that: The clamp plate (1) is located above the circular magnet (2), and a plurality of clamps (4) are arranged on the circumferential wall of the clamp plate (1) at equal intervals, and a first iron sheet (5) is pasted in the middle of the bottom of the clamp plate (1); the base (3) is located below the circular magnet (2), and a plurality of positioning holes (6) are arranged on the edge of the base (3) and are arranged around the center of the base (3), and the positioning holes (6) are arranged in a one-to-one correspondence with the clamps (4), and the sample tube (10) is clamped by the clamps (4) and the positioning holes (6), and a second iron sheet (7) is pasted in the center of the base (3); the clamp plate (1) is fixed above the circular magnet (2) by the first iron sheet (5), and the base (3) is fixed below the circular magnet (2) by the second iron sheet (7), and the centers of the clamp plate (1), the circular magnet (2) and the base (3) are aligned.

2. The magnetic frame based on circular magnets according to claim 1, characterized in that: The clamp (4) is a U-shaped buckle, the back of the clamp (4) is fixed on the circumferential wall of the clamp plate (1), and the opening of the clamp (4) faces the outside of the circumferential wall of the clamp plate (1).

3. The magnetic frame based on circular magnets according to claim 1, characterized in that: The fixture plate (1) and the base (3) are both made of plastic material by injection molding or 3D printing.

4. The magnetic frame based on circular magnets according to claim 1, characterized in that: The circular magnet (2) is provided as a single one or multiple ones, and the multiple circular magnets (2) are sequentially spliced ​​along the center of the height direction of the circular magnet (2).

5. The magnetic frame based on circular magnets according to claim 1, characterized in that: The circular magnet (2) is a solid magnet or a magnet with a hole in the center.

6. The magnetic frame based on circular magnets according to claim 1, characterized in that: The circular magnet (2) is a neodymium iron boron magnet.

7. The magnetic frame based on circular magnets according to claim 5, characterized in that: The first iron sheet (5) is adhered to the fixture plate (1) by using a first double-sided adhesive tape (8), and the second iron sheet (7) is adhered to the base (3) by using a second double-sided adhesive tape (9); the diameter of the first iron sheet (5) and the diameter of the second iron sheet (7) are both smaller than or equal to the diameter of the circular magnet (2), and when the circular magnet (2) is a magnet with a central hole, the diameter of the first iron sheet (5) and the diameter of the second iron sheet (7) are both larger than the diameter of the central hole of the circular magnet (2).

8. The magnetic frame based on circular magnets according to claim 7, characterized in that: The first double-sided adhesive tape (8) and the second double-sided adhesive tape (9) are both acrylic double-sided adhesive tapes; the size of the first double-sided adhesive tape (8) is consistent with the size of the first iron sheet (5); and the size of the second double-sided adhesive tape (9) is consistent with the size of the second iron sheet (7).

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