Solid-phase extraction device

Abstract

The utility model relates to the related technical field of solid-phase extraction devices, and discloses a solid-phase extraction device which comprises a hollow pipe, a first filler box, a second filler box and a third filler box are arranged in the hollow pipe, and net-shaped sieve plates are fixed at the bottoms of the first filler box, the second filler box and the third filler box. An inner threaded pipe is fixed to the center of the top of the meshy sieve plate located on the inner sides of the first filler box, the second filler box and the meshy sieve plate, and a threaded rod used in cooperation with the inner threaded pipe is fixed to the center of the bottom of the meshy sieve plate fixed to the bottoms of the third filler box and the second filler box. A lower bolt is in threaded connection with the upper portion of the interior of the inner threaded pipe located on the inner side of the third filler box, an upper bolt is installed above the lower bolt through a traction rope, a lower frame is fixed to the upper portion of the hollow pipe, and an upper frame is detachably installed on the top of the lower frame through a supporting plate; the liquid passing speed of the carbamate pesticide solution in the hollow pipe is better controlled, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of solid phase extraction devices, specifically a solid phase extraction device. Background Technology

[0002] Solid-phase extraction (SPE) is a sample pretreatment technique developed in recent years, combining liquid-solid extraction (LC-SPIE) and column liquid chromatography (LC-LC). It is primarily used for sample separation, purification, and concentration. Compared to traditional liquid-liquid extraction, it can improve analyte recovery, more effectively separate analytes from interfering components, reduce sample pretreatment steps, and is simple, time-saving, and labor-saving. It is widely used in pharmaceuticals, food, environmental protection, commodity inspection, and chemical industries.

[0003] In related technologies, please refer to Chinese Patent No. CN212757344U, which specifically discloses a solid-phase extraction device. When using this solid-phase extraction device, first, place the device in the desired location, then align the outlet of the device with the receiving cylinder. At this point, the carbamate pesticide solution can be poured into the hollow tube from the top. The carbamate pesticide solution will then be adsorbed and extracted by the packing layer inside the hollow tube. After extraction, the water in the carbamate pesticide solution will be discharged from the outlet, thus completing the extraction experiment of the carbamate pesticide solution. The extracted carbamate pesticide residues are then used for the next experimental detection step.

[0004] The applicant found shortcomings in the use of the aforementioned solid-phase extraction device: although it can perform extraction experiments on carbamate pesticide solutions, the prior art still has shortcomings in actual use: after the carbamate pesticide solution comes into contact with the packing layer, the flow rate of the carbamate pesticide solution is slow; the flow rate of the carbamate pesticide solution inside the hollow tube cannot be precisely controlled, reducing the extraction efficiency.

[0005] In view of this, this technical solution proposes a solid phase extraction device to better solve the problems mentioned above. Utility Model Content

[0006] The technical solution adopted by this utility model is as follows: A solid phase extraction device includes a hollow tube, wherein a packing box 1, a packing box 2, and a packing box 3 are arranged inside the hollow tube, and a mesh screen plate is fixed at the bottom of each of the packing boxes 1, 2, and 3. An internally threaded tube is fixed at the center of the top of the mesh screen plate located inside the packing boxes 1, 2, and 3, and a threaded rod that cooperates with the internally threaded tube is fixed at the center of the bottom of the mesh screen plate fixed at the bottom of the packing boxes 3 and 2.

[0007] A lower bolt is threadedly connected to the upper part of the internally threaded tube located inside the stuffing box three, and an upper bolt is installed above the lower bolt via a traction rope;

[0008] The hollow tube is fixed with a lower frame, and the top of the lower frame is detachably installed with an upper frame via a support plate. A storage cylinder is connected through the interior of the upper frame, and an electric telescopic rod is installed inside the storage cylinder. A piston for pressurizing the interior of the hollow tube is detachably installed at the extended end of the electric telescopic rod, and the piston is threadedly connected to an upper bolt.

[0009] In a preferred embodiment, a discharge port for connection with a receiving cylinder is provided at the bottom of the hollow tube.

[0010] In a preferred embodiment, the packing boxes 1, 2, and 3 are identical in size and are stacked together. The interior of packing box 1 is filled with a magnesium silicate particle packing layer, the interior of packing box 2 is filled with a carbon nanoparticle packing layer, and the interior of packing box 3 is filled with a silica gel particle packing layer.

[0011] In a preferred embodiment, the mesh screen plate consists of a frame and a screen, with the screen located at the bottom inner side of the packing boxes one, two, and three.

[0012] In a preferred embodiment, the internally threaded tube is adapted to the threaded rod, and the threaded rod is threadedly connected in the internally threaded tube.

[0013] In a preferred embodiment, the length of the traction rope is greater than the length of the hollow tube, and the traction rope is rotatably mounted to the lower bolt and the upper bolt.

[0014] In a preferred embodiment, the telescopic length of the internal telescopic rod of the electric telescopic rod can be controlled by an external control console. The piston is adapted to the inside of the hollow tube and fits against the inner wall of the hollow tube. A sealing ring adapted to the inner wall of the hollow tube can be provided on the outside of the piston.

[0015] In a preferred embodiment, a threaded hole for mounting with a bolt is provided at the center of the bottom of the piston, and the bolt is threaded into the threaded hole.

[0016] In a preferred embodiment, the upper frame is bolted to the support plate, and the height of the support plate is greater than the total height of the stuffing box one, stuffing box two, and stuffing box three.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: better control of the flow rate of carbamate pesticide solution in the hollow tube, and increased work efficiency.

[0018] 1. In this utility model, by setting up a packing box one, a packing box two, and a packing box three inside the hollow tube, the carbamate pesticide solution can be adsorbed and extracted through the filling layer inside the packing box one, packing box two, and packing box three. After the extraction is completed, the water in the carbamate pesticide solution is discharged through the outlet, thereby completing the extraction experiment of the solution. Then, the extracted carbamate pesticide residue is used for the next step of experimental detection.

[0019] 2. In this utility model, the piston is moved inside the hollow tube by an electric telescopic rod. At this time, the piston pressurizes the inside of the hollow tube, which can better control the flow rate of the carbamate pesticide solution in the hollow tube. After the extraction experiment is completed, the upper bolt is removed from the bottom of the piston, and the traction rope is pulled upward to remove the packing box one, packing box two and packing box three from the inside of the hollow tube. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the hollow tube structure of this utility model;

[0022] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure of region A in the middle.

[0023] The markings in the diagram are: 1-Hollow tube; 2-Discharge port; 3-Stuffing box one; 4-Stuffing box two; 5-Stuffing box three; 6-Mesh screen plate; 7-Internal threaded tube; 8-Threaded rod; 9-Lower bolt; 10-Traction rope; 11-Upper bolt; 12-Lower frame; 13-Support plate; 14-Upper frame; 15-Storage cylinder; 16-Electric telescopic rod; 17-Piston. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The following will combine Figures 1-3 A solid-phase extraction apparatus according to an embodiment of the present invention will be described in detail.

[0026] refer to Figure 1-3As shown, a solid-phase extraction device includes a hollow tube 1. A discharge port 2 for connection to a receiving cylinder is located at the bottom of the hollow tube 1. Inside the hollow tube 1 are three packing boxes: a first packing box 3, a second packing box 4, and a third packing box 5. These three packing boxes are identical in size and are stacked together. The first packing box 3 is filled with a layer of magnesium silicate particles, the second packing box 4 is filled with a layer of carbon nanoparticles, and the third packing box 5 is filled with a layer of silica gel particles. Both the bottom of the second box 4 and the third box 5 are fixed with a mesh screen plate 6. The mesh screen plate 6 consists of a frame and a screen. The screen is located at the bottom inner side of the first box 3, the second box 4 and the third box 5. The top center of the mesh screen plate 6 located inside the first box 3, the second box 4 and the mesh screen plate 6 is fixed with an internal threaded tube 7. The bottom center of the mesh screen plate 6 fixed at the bottom of the third box 5 and the second box 4 is fixed with a threaded rod 8 that works with the internal threaded tube 7. The internal threaded tube 7 and the threaded rod 8 are adapted to each other, and the threaded rod 8 is threadedly connected in the internal threaded tube 7.

[0027] refer to Figure 1-3 As shown, a lower bolt 9 is threadedly connected to the upper part of the internally threaded tube 7 located inside the stuffing box 3 5, and an upper bolt 11 is installed above the lower bolt 9 via a traction rope 10. The length of the traction rope 10 is greater than the length of the hollow tube 1, and the traction rope 10 is rotatably installed with the lower bolt 9 and the upper bolt 11.

[0028] refer to Figure 1-3 As shown, a lower frame 12 is fixed above the hollow tube 1, and an upper frame 14 is detachably installed on the top of the lower frame 12 via a support plate 13. The upper frame 14 is bolted to the support plate 13. The height of the support plate 13 is greater than the total height of the first stuffing box 3, the second stuffing box 4, and the third stuffing box 5. A storage cylinder 15 is connected through the interior of the upper frame 14, and an electric telescopic rod 16 is installed inside the storage cylinder 15. A piston 17 for pressurizing the interior of the hollow tube 1 is detachably installed at the extended end of the electric telescopic rod 16. The piston 17 is threadedly connected to the upper bolt 11. The telescopic length of the telescopic rod inside the electric telescopic rod 16 can be controlled by an external control console. The piston 17 is adapted to the interior of the hollow tube 1 and fits against the inner wall of the hollow tube 1. A sealing ring adapted to the inner wall of the hollow tube 1 can be provided on the outside of the piston 17. A threaded hole for installation with the upper bolt 11 is opened at the center of the bottom of the piston 17, and the upper bolt 11 is threadedly connected in the threaded hole.

[0029] Advantages of this application: Better control of the flow rate of carbamate pesticide solution in hollow tube 1, increasing work efficiency.

[0030] Working principle: The carbamate pesticide solution is poured into the hollow tube 1 through the opening at the top. The carbamate pesticide solution can be adsorbed and extracted by the filling layers inside the packing boxes 3, 4, and 5. The piston 17 is moved inside the hollow tube 1 by the electric telescopic rod 16. At this time, the piston 17 pressurizes the inside of the hollow tube 1, which can better control the flow rate of the carbamate pesticide solution in the hollow tube 1. After the extraction experiment is completed, the upper bolt 11 is removed from the bottom of the piston 17, and the traction rope 10 is pulled upward to remove the packing boxes 3, 4, and 5 from the inside of the hollow tube 1.

[0031] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by a technician in the field through simple programming, which is common knowledge in the field. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A solid phase extraction device comprising a hollow tube (1), characterized in that: The inside of the hollow pipe (1) is provided with filler box one (3), filler box two (4) and filler box three (5), and the bottom of filler box one (3), filler box two (4) and filler box three (5) is fixed with a mesh sieve plate (6), the top center of the mesh sieve plate (6) inside the filler box one (3), filler box two (4) and mesh sieve plate (6) is fixed with an internal thread pipe (7), the bottom center of the mesh sieve plate (6) fixed at the bottom of the filler box three (5) and filler box two (4) is fixed with a threaded rod (8) matched with the internal thread pipe (7); The inside of the internal thread pipe (7) inside the filler box three (5) is threadedly connected with a lower bolt (9) above, and the upper bolt (11) is installed above the lower bolt (9) through a traction rope (10), The upper part of the hollow pipe (1) is fixed with a lower frame (12), and the top of the lower frame (12) is detachably installed with an upper frame (14) through a support plate (13), the inside of the upper frame (14) is connected with a storage cylinder (15), and the inside of the storage cylinder (15) is provided with an electric telescopic rod (16), the extending end of the electric telescopic rod (16) is detachably installed with a piston (17) used for pressurizing the inside of the hollow pipe (1), and the piston (17) is threadedly connected with the upper bolt (11).

2. A solid phase extraction device as claimed in claim 1, characterised in that: The lower part of the hollow pipe (1) is provided with a discharge port (2) connected with a material receiving cylinder.

3. A solid phase extraction device as claimed in claim 1, characterized in that: The filler box one (3), filler box two (4) and filler box three (5) are of the same specification, and the filler box one (3), filler box two (4) and filler box three (5) are stacked together, the inside of the filler box one (3) is filled with a magnesium silicate particle filler layer, the inside of the filler box two (4) is filled with a carbon nano particle filler layer, and the inside of the filler box three (5) is filled with a silica gel particle filler layer.

4. A solid phase extraction device as claimed in claim 1, characterized in that: The mesh sieve plate (6) is composed of a frame and a screen, and the screen is located at the lowermost inside of the filler box one (3), filler box two (4) and filler box three (5).

5. A solid phase extraction device as claimed in claim 1, characterized in that: The internal thread pipe (7) is matched with the threaded rod (8), and the threaded rod (8) is threadedly connected in the internal thread pipe (7).

6. A solid phase extraction device as claimed in claim 1, characterized in that: The length of the traction rope (10) is greater than the length of the hollow pipe (1), and the traction rope (10) is rotatably installed with the lower bolt (9) and the upper bolt (11).

7. A solid phase extraction device as claimed in claim 1, wherein: The telescopic length of the telescopic rod inside the electric telescopic rod (16) can be controlled by an external control console, the piston (17) is matched with the inside of the hollow pipe (1) and is attached to the inner wall of the hollow pipe (1), and a sealing ring matched with the inner wall of the hollow pipe (1) can be provided outside the piston (17).

8. A solid phase extraction device as claimed in claim 1, characterized in that: A threaded hole is formed in the bottom center of the piston (17) for mounting the upper bolt (11), and the upper bolt (11) is threadedly connected in the threaded hole.

9. A solid phase extraction device as claimed in claim 1, wherein: The upper frame (14) is installed on the support plate (13) by bolts, and the height of the support plate (13) is greater than the total height of the filler box one (3), filler box two (4) and filler box three (5).

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