Solid-phase extraction device for food detection

Abstract

The utility model belongs to the technical field of extraction devices, and particularly relates to a solid-phase extraction device for food detection, which comprises a frame and a negative pressure pipe fixedly mounted on the frame, a sealing cover is fixedly mounted at the top of the frame, placing racks are mounted on the sealing cover in an array manner, a support frame is fixedly mounted in the frame, and the negative pressure pipe is fixedly mounted on the support frame. And a square groove corresponding to the placing frame is fixedly formed in the supporting frame, and a rubber plate is fixedly installed in the square groove. According to the solid-phase extraction device for food detection disclosed by the utility model, test tubes with different sizes can be conveniently and fixedly clamped by the solid-phase extraction device for food detection through the mounted rubber block, and after the test tubes are placed in the square groove and moved to one side of the rubber plate, the pressure spring is reset to push the rubber block to slide in the placing groove; furthermore, the rubber blocks can fixedly clamp the test tubes between the rubber blocks and the rubber plates, so that the purpose of quickly clamping the test tubes with different sizes is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction devices, in particular to a solid phase extraction device for food detection. Background Art

[0002] The main purpose of the solid phase extraction device is to reduce the interference of the sample matrix. It is widely used in various food safety inspections. Based on the selective adsorption ability of the adsorbent to the target substance, the solid phase extraction device can effectively separate and enrich the target compounds from complex samples, thereby improving the accuracy and sensitivity of the analysis. The operation is relatively simple and easy to sample, which reduces the technical difficulty and labor intensity of the operator. It is an indispensable and important tool in food safety testing.

[0003] During use, the existing solid phase extraction device for food testing is not convenient for quickly clamping and fixing test tubes of different sizes. When fixing the position of the test tube, most of them still need to be adjusted and fixed manually, which affects work efficiency.

[0004] Patent document CN216695792U discloses a solid phase extraction device for food pretreatment based on food detection, "including a solid phase extraction device body, an adjustment mechanism is fixedly installed on the top of the solid phase extraction device body, and a clamping mechanism is provided on both sides of the bottom of the adjustment mechanism. The adjustment mechanism is clamped to the top of the solid phase extraction device body through the clamping mechanism, and a storage mechanism is fixedly installed in the middle of the bottom of the extraction device. The utility model adopts the above structure, through the clamping mechanism, so that when in use, the opening and closing door can be opened, and then the limiting protrusion inside the square groove is abutted, so that the limiting protrusion presses the telescopic spring to retract. The limiting protrusion can be moved into the groove at this time. Since the limiting position between the groove and the square groove is lost, the top cover can be removed at this time. When the top cover is removed, the adjusting mechanism can be removed as a whole. At this time, the inside of the solid phase extraction device body can be cleaned more conveniently, which effectively improves the convenience of use of the device. However, the solid phase extraction device for food pretreatment based on food testing in the above-mentioned public documents mainly considers the convenience of cleaning the inside of the solid phase extraction device, and does not consider the problem of clamping and limiting test tubes of different sizes at a fast speed. Therefore, it is necessary to develop a solid phase extraction device for food testing. Utility Model Content

[0005] The utility model aims to provide a solid phase extraction device for food detection, so as to solve the technical problem that it is inconvenient to quickly limit the positions of test tubes of different sizes proposed in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solid phase extraction device for food testing, comprising a frame and a negative pressure tube fixedly installed on the frame, a sealing cover fixedly installed on the top of the frame, a placing rack array-mounted on the sealing cover, a supporting rack fixedly installed inside the frame, a square groove corresponding to the placing rack fixedly installed on the supporting rack, a rubber plate fixedly installed inside the square groove, a placing groove is provided inside the square groove, a rubber block is provided inside the placing groove, two groups of sliding grooves are fixedly installed on the square groove, a pressure spring is fixedly installed inside the sliding groove, a connecting plate is symmetrically installed on the rubber block, and one end of the pressure spring is fixedly connected to the connecting plate.

[0007] Preferably, a regulating valve is provided on the negative pressure pipe.

[0008] Preferably, positioning bolts are provided on the placement rack.

[0009] Preferably, a guide cylinder is fixedly mounted on the connecting plate, and one end of the guide cylinder extends to the interior of the rubber block.

[0010] Preferably, a guide rod is passed through the interior of the guide cylinder, and one end of the guide rod is fixedly connected to the interior of the sliding groove.

[0011] Preferably, a base plate is fixedly mounted on the bottom of the frame.

[0012] Preferably, an anti-sliding block is fixedly mounted on the bottom plate, and the anti-sliding block is circular.

[0013] Preferably, a plate is fixedly mounted on the bottom plate, and positioning suction cups are arrayed on the plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model facilitates the solid phase extraction device for food testing to quickly fix and clamp test tubes of different sizes through the installed rubber block. After the test tube is placed inside the square groove, the test tube is moved to one side of the rubber plate. The pressure spring reset will push the rubber block to slide inside the placement groove, and then the rubber block will fix and clamp the test tube between the rubber plate, thereby achieving the purpose of quickly clamping test tubes of different sizes and improving work efficiency.

[0016] 2. The utility model can improve the stability of the position of the solid phase extraction device for food testing by installing the bottom plate. After the frame is placed on the table, the positioning suction cup will contact the table. Pressing the frame will cause the inside of the positioning suction cup to become a negative pressure state, thereby limiting the position of the bottom plate and causing the anti-slip block to contact the table, further improving the anti-slip property, thereby achieving the purpose of improving the stability of the placement of the solid phase extraction device for food testing, and effectively avoiding position sliding that affects the use of the solid phase extraction device for food testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the framework structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the square groove structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the rubber block structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the bottom plate structure of the utility model.

[0022] In the figure: 1. frame; 2. negative pressure pipe; 3. regulating valve; 4. sealing cover; 5. placement rack; 6. positioning bolt; 7. support frame; 8. square groove; 9. rubber plate; 10. sliding groove; 11. pressure spring; 12. guide rod; 13. placement groove; 14. rubber block; 15. connecting plate; 16. guide cylinder; 17. bottom plate; 18. anti-sliding block; 19. plate; 20. positioning suction cup. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 , Figure 2 and Figure 3A solid phase extraction device for food detection comprises a frame 1 and a negative pressure tube 2 fixedly mounted on the frame 1, a sealing cover 4 is fixedly mounted on the top of the frame 1, a placing rack 5 is arrayed on the sealing cover 4, a support frame 7 is fixedly mounted inside the frame 1, a square groove 8 corresponding to the placing rack 5 is fixedly mounted on the support frame 7, a rubber plate 9 is fixedly mounted inside the square groove 8, a placing groove 13 is arranged inside the square groove 8, a rubber block 14 is arranged inside the placing groove 13, two groups of sliding grooves 10 are fixedly mounted on the square groove 8, a pressure spring 11 is fixedly mounted inside the sliding groove 10, a connecting plate 15 is symmetrically mounted on the rubber block 14, and one end of the pressure spring 11 is fixedly connected to the connecting plate 15, and a solid phase extraction device for food detection is used. When the extraction device extracts food, after placing the test tube inside the square groove 8, the test tube is moved to one side of the rubber plate 9, the pressure spring 11 is reset to push the rubber block 14 to slide inside the placement groove 13, and then the rubber block 14 will fix the test tube between the rubber plate 9, so as to achieve the purpose of quickly clamping test tubes of different sizes, thereby improving work efficiency. After the extraction column is placed inside the placement rack 5, the extraction column will be located directly above the clamped test tube, and then the negative pressure tube 2 is connected to the external negative pressure pump through a pipeline. The negative pressure pump works to make the inside of the frame 1 a negative pressure state, and the liquid inside the extraction column is extracted. The extracted liquid will flow into the inside of the test tube for storage, thereby achieving the purpose of solid phase extraction of food.

[0025] See also Figure 1 A regulating valve 3 is provided on the negative pressure pipe 2, and the state of the negative pressure pipe 2 can be adjusted by the regulating valve 3, thereby adjusting the negative pressure state inside the frame 1.

[0026] See also Figure 1 The placement rack 5 is provided with positioning bolts 6, and the position of the extraction column placed inside the placement rack 5 can be fixed by the positioning bolts 6.

[0027] See also Figure 3 and Figure 4 A guide cylinder 16 is fixedly mounted on the connecting plate 15, and one end of the guide cylinder 16 extends to the inside of the rubber block 14. A guide rod 12 is passed through the inside of the guide cylinder 16, and one end of the guide rod 12 is fixedly connected to the inside of the sliding groove 10. When the rubber block 14 moves, the guide cylinder 16 will be driven to slide on the guide rod 12, and then the rubber block 14 will be guided, so that the rubber block 14 can move smoothly.

[0028] See also Figure 1 and Figure 5A bottom plate 17 is fixedly installed at the bottom of the frame 1, and an anti-sliding block 18 is fixedly installed on the bottom plate 17, and the anti-sliding block 18 is circular. A plate 19 is fixedly installed on the bottom plate 17, and a positioning suction cup 20 is installed in an array on the plate 19. When the solid phase extraction device for food detection is used, after the frame 1 is placed on the desktop, the positioning suction cup 20 will contact the desktop. Pressing the frame 1 will make the inside of the positioning suction cup 20 a negative pressure state, thereby limiting the position of the bottom plate 17, and at the same time making the anti-sliding block 18 contact the desktop, further improving the anti-slip, achieving the purpose of improving the stability of the placement of the solid phase extraction device for food detection, and effectively avoiding position sliding, which affects the use of the solid phase extraction device for food detection.

[0029] Working principle: first, when using the solid phase extraction device for food testing to extract food, when using the solid phase extraction device for food testing, after placing the frame 1 on the desktop, the positioning suction cup 20 will contact the desktop, and pressing the frame 1 will make the inside of the positioning suction cup 20 a negative pressure state, thereby limiting the position of the bottom plate 17, and at the same time making the anti-slip block 18 contact the desktop, further improving the anti-slip, achieving the purpose of improving the stability of the placement of the solid phase extraction device for food testing, effectively avoiding position sliding and affecting the use of the solid phase extraction device for food testing, and placing the test tube inside the square groove 8, so that the test tube moves to the rubber After the plate 9 is moved to one side, the pressure spring 11 is reset to push the rubber block 14 to slide inside the placement groove 13, and then the rubber block 14 will fix the test tube between the rubber plate 9, so as to achieve the purpose of quickly clamping test tubes of different sizes, thereby improving work efficiency. After the extraction column is placed inside the placement rack 5, the extraction column will be located directly above the clamped test tube, and then a pipeline is used to connect the negative pressure tube 2 with the external negative pressure pump. The negative pressure pump works to make the inside of the frame 1 a negative pressure state, and the liquid inside the extraction column is extracted. The extracted liquid will flow into the inside of the test tube for storage, thereby achieving the purpose of solid phase extraction of food.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A solid phase extraction device for food testing, comprising a frame (1) and a negative pressure tube (2) fixedly mounted on the frame (1), characterized in that: A sealing cover (4) is fixedly installed on the top of the frame (1), a placing frame (5) is installed in an array on the sealing cover (4), a supporting frame (7) is fixedly installed inside the frame (1), a square groove (8) corresponding to the placing frame (5) is fixedly installed on the supporting frame (7), a rubber plate (9) is fixedly installed inside the square groove (8), a placing groove (13) is arranged inside the square groove (8), a rubber block (14) is arranged inside the placing groove (13), two groups of sliding grooves (10) are fixedly installed on the square groove (8), a pressure spring (11) is fixedly installed inside the sliding groove (10), a connecting plate (15) is symmetrically installed on the rubber block (14), and one end of the pressure spring (11) is fixedly connected to the connecting plate (15), and one end of the pressure spring (11) is fixedly connected to the connecting plate (15).

2. A solid phase extraction device for food detection according to claim 1, characterized in that: The negative pressure pipe (2) is provided with a regulating valve (3).

3. A solid phase extraction device for food testing according to claim 1, characterized in that: The placement rack (5) is provided with positioning bolts (6).

4. A solid phase extraction device for food testing according to claim 1, characterized in that: A guide cylinder (16) is fixedly mounted on the connecting plate (15), and one end of the guide cylinder (16) extends to the interior of the rubber block (14).

5. A solid phase extraction device for food testing according to claim 4, characterized in that: A guide rod (12) is inserted into the guide cylinder (16), and one end of the guide rod (12) is fixedly connected to the inside of the sliding groove (10).

6. A solid phase extraction device for food testing according to claim 1, characterized in that: A bottom plate (17) is fixedly mounted on the bottom of the frame (1).

7. A solid phase extraction device for food testing according to claim 6, characterized in that: An anti-sliding block (18) is fixedly mounted on the bottom plate (17), and the anti-sliding block (18) is circular.

8. A solid phase extraction device for food testing according to claim 7, characterized in that: A plate (19) is fixedly mounted on the bottom plate (17), and positioning suction cups (20) are mounted in an array on the plate (19).

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