A magnetic solid phase extraction device for extracting food contaminants

Abstract

The utility model discloses a kind of magnetic solid-phase extraction devices for extracting food pollutants, more specifically in the technical field of medical equipment, including chassis, the top of chassis is equipped with extraction piece for extracting food pollutants, and extraction piece is cleaned adhering object by auxiliary part;Auxiliary part includes hollow plate arranged at the top of chassis, soft pipe joint is fixedly connected to the rear side of hollow plate, and a plurality of mounting holes are formed in the outside of hollow plate, hollow ring is mounted in each mounting hole, and a plurality of gas holes in annular array distribution are formed in the outside and the inside of hollow ring.The utility model cleans adhering object adhered to the outside of sheath by cleaning ring, and air pump delivers gas to the inside of hollow plate through soft pipe joint, and then flows to the inside of hollow ring through gas hole, so that sheath can be air-cooled and dried by air flow, ensure the cleanliness of sheath, ensure the extraction performance of magnetic frame and sheath subsequently.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and more specifically to a magnetic solid phase extraction device for extracting food contaminants. Background Technology

[0002] With the improvement of people's living standards and the increasing attention to health, food safety has become a focus of high concern for the whole society. Food can be contaminated by various pollutants at every stage of production, processing, storage, transportation, and sales, such as pesticide residues, veterinary drug residues, heavy metals, mycotoxins, illegal additives, and microbial metabolites. Long-term ingestion of these pollutants can pose a serious threat to consumers' health, causing acute poisoning, chronic cumulative damage, and even serious consequences such as cancer and birth defects. Therefore, establishing efficient and accurate methods for detecting food contaminants is one of the key means to ensure food safety. Among these methods, solid-phase extraction (SPE), a technique based on the selective adsorption and desorption of target compounds in liquid samples using solid adsorbents, has become one of the mainstream technologies for the pretreatment of food contaminants due to its advantages such as simple operation, high enrichment efficiency, and relatively low organic solvent usage.

[0003] As shown in the prior art published in CN218584480U, although this prior art involves adding the solution to the first of six processing stations (activation station) using a pipette, rotating it at a certain angle after each addition until all the deep well plates at all six processing stations have been filled, a rotary table then rotates the first station (activation station) directly below the magnetic frame. The sheath moves up and down under the action of a screw motor, ensuring thorough mixing of the reagent solution. After activation at the first station, the sheath moves downwards to the bottom of the deep well plate, simultaneously controlling the magnetic frame to also move downwards to the bottom of the deep well plate. At this point, the magnetic bead solution is adsorbed onto the outer edge of the sheath. Then, the sheath and magnetic frame begin to move upwards under the action of the screw motor. When removed from the deep well plate, the cover plate rotates to the bottom of the magnetic frame to prevent solution from falling from the outside of the sheath and contaminating the actual solution. However, in this prior art, the sheath cannot be cleaned and maintained after use, which can contaminate the magnetic frame and the sheath, thus affecting the subsequent extraction effect. Utility Model Content

[0004] Therefore, this utility model provides a magnetic solid phase extraction device for extracting food contaminants, in order to solve the problem in the prior art that the adhesion of the outer sheath due to the lack of cleaning and maintenance of the sheath can affect the subsequent extraction effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a magnetic solid phase extraction device for extracting food contaminants, comprising a base frame, wherein the top of the base frame is provided with an extraction element for extracting food contaminants, and the extraction element is cleaned of adhering substances by an auxiliary component; The auxiliary component includes a hollow plate on the top of the base frame. A hose connector is fixedly connected to the rear side of the hollow plate. Multiple mounting holes are opened on the outside of the hollow plate. A hollow ring is installed inside each mounting hole. Multiple air holes are opened on the outer and inner sides of the hollow ring in a ring array. Multiple material holes are opened on one side of the mounting hole corresponding to the hollow ring. The material holes are connected to the air holes on the outer side of the hollow ring. An assembly groove is provided inside the bottom end of the hollow ring, and a cleaning ring is installed inside the assembly groove.

[0006] Furthermore, a fixed bracket is installed on the rear side of the top of the base frame, and an air pump is installed on the rear side of the fixed bracket. The output end of the air pump passes through the fixed bracket and is connected to a hose connector.

[0007] Furthermore, two spaced connecting columns are installed on the rear side of the hollow plate, and a support column is provided on the rear side of the connecting column. The support column is installed on the front side of the fixed bracket, and a connecting ring is sleeved on the front end of the support column. The connecting ring is sleeved on the front end of the connecting column and is threadedly connected to the support column and the connecting column.

[0008] Furthermore, the extraction component includes an adjustment plate disposed on the top of the hollow plate, and an electric push rod for connecting the adjustment plate is installed on the top of the fixed bracket. Multiple spaced magnetic frames are installed at the bottom of the adjustment plate, and a protective sleeve is sleeved on the bottom of the magnetic frames. The top of the protective sleeve is disposed inside the hollow ring.

[0009] Furthermore, a movable plate is mounted on the top of the base frame via a rotating shaft, and multiple extraction boxes arranged in a circular array are mounted on the top of the movable plate, with the bottom end of the sheath extending into the interior of one of the extraction boxes.

[0010] Furthermore, a servo motor is installed at the top of the inner cavity of the base frame, and the output shaft of the servo motor passes through the base frame and is fixed together with the rotating shaft on the movable plate.

[0011] Furthermore, a positioning ring is installed at the bottom of the movable plate, and a ring groove is opened on the top of the base frame on one side corresponding to the positioning ring, with the bottom end of the positioning ring extending into the ring groove.

[0012] Furthermore, two spaced-apart side plates are installed inside the top of the fixed bracket, and the cross-section of the side plates is inclined.

[0013] The present invention has the following advantages: The cleaning ring cleans the adhering substances on the outside of the sheath, while the air pump delivers gas through the hose connector to the inside of the hollow plate, and then through the air hole to the inside of the hollow ring. This air circulation allows the sheath to be air-cooled and dried, ensuring the cleanliness and hygiene of the sheath and guaranteeing the subsequent extraction performance of the magnetic rack and the sheath. By rotating the connecting ring inward to the outside of the support column, the connecting ring is separated from the connecting column, thus freeing the hollow plate from its position. Then, the hose connector is disassembled to separate it from the air pump, which facilitates the inspection and maintenance of the hollow plate. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a sectional view of the base frame of this utility model; Figure 3 This is a bottom view of the fixed bracket of this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of section A in the middle; Figure 5 This is an exploded view of the hollow ring of this utility model; Figure 6 This is a front view of the adjustment plate of this utility model; Figure 7 This is the front view of the sheath of this utility model.

[0017] In the diagram: 1. Base frame; 2. Hollow plate; 3. Hose connector; 4. Mounting hole; 5. Hollow ring; 6. Air hole; 7. Material hole; 8. Assembly groove; 9. Cleaning ring; 10. Fixed bracket; 11. Air pump; 12. Connecting column; 13. Support column; 14. Connecting ring; 15. Adjusting plate; 16. Electric push rod; 17. Magnetic frame; 18. Sheath; 19. Movable plate; 20. Extraction box; 21. Servo motor; 22. Positioning ring; 23. Ring groove; 24. Side plate. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0019] Refer to the instruction manual appendix Figure 1-7 This utility model provides a magnetic solid-phase extraction device for extracting food contaminants, including a base frame 1. The top of the base frame 1 is provided with an extraction element for extracting food contaminants, and the extraction element is cleaned of adhering substances by an auxiliary component. The auxiliary component includes a hollow plate 2 located on the top of the base frame 1. A flexible hose connector 3 is fixedly connected to the rear side of the hollow plate 2, and multiple mounting holes 4 are opened on the outside of the hollow plate 2. A hollow ring 5 is installed inside each mounting hole 4. Multiple air holes 6 are arranged in a ring array on the outer and inner sides of the hollow ring 5, and multiple material holes 7 are opened on one side of the mounting hole 4 corresponding to the hollow ring 5. The material holes 7 are connected to the air holes 6 on the outer side of the hollow ring 5. An assembly groove 8 is opened inside the bottom end of the hollow ring 5, and a cleaning ring 9 is installed inside the assembly groove 8.

[0020] When performing magnetic solid-phase extraction using the above-mentioned equipment, the operator needs to place the reagent solution on the base frame 1. Therefore, a movable plate 19 is installed on the top of the base frame 1 via a rotating shaft. Multiple extraction boxes 20 arranged in a circular array are installed on the top of the movable plate 19, and the bottom end of the protective sleeve 18 extends into the interior of one of the extraction boxes 20. A servo motor 21 is installed on the top of the inner cavity of the base frame 1, and the output shaft of the servo motor 21 passes through the base frame 1 and is fixed together with the rotating shaft on the movable plate 19.

[0021] This allows staff to place the reagent solution inside the extraction box 20, and through the connection between the output shaft of the servo motor 21 and the movable plate 19, the servo motor 21 can drive the movable plate 19 to rotate, thereby adjusting the position of multiple extraction boxes 20, realizing the gradual extraction of the extraction box 20 and improving the extraction efficiency.

[0022] To ensure the stability of the movable plate 19 during operation and prevent it from tilting or wobbling, a positioning ring 22 is installed at the bottom of the movable plate 19. A groove 23 is formed on the top of the base frame 1 corresponding to the positioning ring 22, with the bottom end of the positioning ring 22 extending into the groove 23. This engagement between the positioning ring 22 and the groove 23 limits the movement of the movable plate 19, ensuring its stability during operation and preventing tilting or deformation.

[0023] After the reagent solution is placed in the extraction chamber 20, the operator activates the extraction unit, which includes an adjusting plate 15 on top of the hollow plate 2. An electric push rod 16 for connecting the adjusting plate 15 is mounted on top of the fixed bracket 10. Multiple spaced magnetic frames 17 are mounted on the bottom of the adjusting plate 15, and a protective sleeve 18 is fitted over the bottom of each magnetic frame 17, with the top of the sleeve 18 located inside the hollow ring 5. Activating the electric push rod 16 moves the magnetic frames 17 on the adjusting plate 15 downwards, causing the protective sleeves 18 on the magnetic frames 17 to move into the extraction chamber 20. This reciprocating motion mixes the reagent solution, achieving extraction.

[0024] Meanwhile, to ensure the stability of the adjusting plate 15 and the electric push rod 16, a fixed bracket 10 is installed at the rear of the top of the base frame 1. An air pump 11 is installed at the rear of the fixed bracket 10, and the output end of the air pump 11 passes through the fixed bracket 10 and is connected to the hose connector 3. In this way, the electric push rod 16 can be supported by the fixed bracket 10, ensuring the stability of the adjusting plate 15 when the electric push rod 16 moves, and preventing the adjusting plate 15 from tilting during the up and down movement. In addition, two spaced side plates 24 are installed inside the top of the fixed bracket 10, and the cross-section of the side plates 24 is inclined. This allows the side plates 24 to support the top of the fixed bracket 10, ensuring the support strength of the fixed bracket 10.

[0025] After the protective sleeve 18 is used, the outside of the protective sleeve 18 needs to be cleaned to prevent contamination from adhering substances. Therefore, when the protective sleeve 18 is moved above the adjusting plate 15, the cleaning ring 9 inside the hollow ring 5 can clean the adhering substances on the outside of the protective sleeve 18. Then, the air pump 11 delivers gas to the inside of the hollow plate 2 through the hose connector 3. Due to the connection between the material hole 7 and the air hole 6, the gas can flow into the inside of the hollow ring 5 and into the inside of the hollow ring 5 through the air hole 6 on the inner side of the hollow ring 5. The air flow can perform air-cooled cleaning of the cleaned protective sleeve 18 to ensure the cleanliness and hygiene of the protective sleeve 18 and ensure the subsequent extraction performance of the magnetic rack 17 and the protective sleeve 18.

[0026] After prolonged use, the hollow slab 2 requires periodic maintenance of its internal structure. Therefore, two spaced-apart connecting columns 12 are installed on the rear side of the hollow slab 2. A support column 13 is located behind each connecting column 12, mounted on the front side of the fixed bracket 10. A connecting ring 14 is fitted around the front end of each support column 13, and is threadedly connected to both the support column 13 and the connecting column 12. This allows the connecting ring 14 to be rotated inwards and moved outside the support column 13, separating it from the connecting column 12 and freeing the hollow slab 2 from its position. The hose connector 3 can then be disassembled from the air pump 11, facilitating maintenance of the hollow slab 2. After maintenance, the connecting column 12 and the support column 13 are threadedly connected again via the connecting ring 14 to ensure the stability of the hollow slab 2.

[0027] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A magnetic solid-phase extraction device for extracting food contaminants, comprising a base frame (1), characterized in that: The base frame (1) is equipped with an extraction element at the top for extracting food contaminants, and the extraction element is cleaned of the adhering substances by an auxiliary component; The auxiliary component includes a hollow plate (2) on the top of the base frame (1). A hose connector (3) is fixedly connected to the rear side of the hollow plate (2). Multiple mounting holes (4) are opened on the outside of the hollow plate (2). A hollow ring (5) is installed inside each mounting hole (4). Multiple air holes (6) are opened on the outer and inner sides of the hollow ring (5) in a ring array. Multiple material holes (7) are opened on one side of the mounting hole (4) corresponding to the hollow ring (5). The material holes (7) are connected to the air holes (6) on the outer side of the hollow ring (5). The hollow ring (5) has an assembly groove (8) inside its bottom end, and a cleaning ring (9) is installed inside the assembly groove (8).

2. The magnetic solid-phase extraction device for extracting food contaminants according to claim 1, characterized in that: A fixed bracket (10) is installed on the rear side of the top of the base frame (1), and an air pump (11) is installed on the rear side of the fixed bracket (10). The output end of the air pump (11) passes through the fixed bracket (10) and is connected to the hose connector (3).

3. The magnetic solid-phase extraction device for extracting food contaminants according to claim 2, characterized in that: Two spaced connecting columns (12) are installed on the rear side of the hollow plate (2). A support column (13) is provided on the rear side of the connecting column (12). The support column (13) is installed on the front side of the fixed bracket (10), and a connecting ring (14) is sleeved on the front end of the support column (13). The connecting ring (14) is sleeved on the front end of the connecting column (12), and the connecting ring (14) is threadedly connected to the support column (13) and the connecting column (12).

4. A magnetic solid-phase extraction device for extracting food contaminants according to claim 2, characterized in that: The extraction component includes an adjustment plate (15) on the top of the hollow plate (2), and an electric push rod (16) for connecting the adjustment plate (15) is installed on the top of the fixed bracket (10). Multiple magnetic frames (17) are installed at intervals on the bottom of the adjustment plate (15), and a protective sleeve (18) is provided on the bottom of the magnetic frame (17). The top of the protective sleeve (18) is located inside the hollow ring (5).

5. A magnetic solid-phase extraction device for extracting food contaminants according to claim 4, characterized in that: The base frame (1) is equipped with a movable plate (19) connected by a rotating shaft at the top. Multiple extraction boxes (20) arranged in a circular array are installed on the top of the movable plate (19). The bottom end of the sheath (18) extends into the interior of one of the extraction boxes (20).

6. A magnetic solid-phase extraction apparatus for extracting food contaminants according to claim 5, characterized in that: A servo motor (21) is installed at the top of the inner cavity of the base frame (1). The output shaft of the servo motor (21) passes through the base frame (1) and is fixed together with the rotating shaft on the movable plate (19).

7. A magnetic solid-phase extraction device for extracting food contaminants according to claim 5, characterized in that: The bottom of the movable plate (19) is equipped with a positioning ring (22), and the top of the base frame (1) is provided with a ring groove (23) on one side corresponding to the positioning ring (22), and the bottom end of the positioning ring (22) extends into the ring groove (23).

8. A magnetic solid-phase extraction device for extracting food contaminants according to claim 2, characterized in that: The fixed bracket (10) has two spaced side plates (24) installed inside its top end, and the side plates (24) have an inclined cross section.

Images