Needle cylinder type purification column for detecting multiple drug residues in animal-derived food
By designing a syringe-type purification column, utilizing threaded connections and piston push rod sealing technology, combined with a multi-layer filtration structure and heating function, the problem of cumbersome operation of existing devices has been solved, achieving efficient and accurate drug residue detection.
Patent Information
- Application Number
- CN202520423545.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing drug residue detection devices require a long time and are cumbersome to prepare extracts and operate using permeable purification columns, which affects detection efficiency.
A syringe-type purification column for detecting multiple drug residues in animal-derived foods was designed. The syringe body and the tube are fixed by a threaded connection. The liquid is sealed by a piston rod and a sealing ring. Purification and filtration are carried out by combining an upper sieve plate, a packing layer and a lower sieve plate. Impurities are filtered by a microporous filter membrane. It can also be heated and kept warm to improve the reliability of the detection results.
It simplifies the purification process, improves detection efficiency, ensures the sealing and purification effect of the liquid, prevents interference from impurities, and improves the accuracy and reliability of the test results.
Smart Images
Figure CN223969538U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drug residue detection technology, specifically a syringe-type purification column for detecting multiple drug residues in animal-derived foods. Background Technology
[0002] Veterinary drug residues refer to the accumulation or retention of the original drug or its metabolites in the bodies or products (such as eggs, dairy products, and meat products) of livestock and poultry after drug administration, including residues of impurities related to veterinary drugs. Veterinary drugs play a vital role in preventing and controlling animal diseases, improving production efficiency, and enhancing the quality of livestock products. However, due to a lack of scientific knowledge among farmers and a single-minded pursuit of economic benefits, the abuse of veterinary drugs is widespread in the current livestock industry. The abuse of veterinary drugs easily leads to the residue of harmful substances in animal-derived food products, posing a direct threat to human health and causing significant harm to the development of animal husbandry and the ecological environment.
[0003] Purifying pesticide residues extracted from food is essential for better detection of drug residues and prohibited substances in food and agricultural products in subsequent procedures. Currently, in the analysis of pesticide residues in animal-derived foods such as vegetables and fruits, the process typically involves first preparing an extract (pesticide residue solution extracted from food), then using a purification column to adsorb interfering substances and obtain the analyte that meets the requirements. This entire process is time-consuming and cumbersome. Therefore, we have proposed a syringe-type purification column for the detection of multiple drug residues in animal-derived foods to address the aforementioned issues. Utility Model Content
[0004] The purpose of this invention is to provide a syringe-type purification column for detecting multiple drug residues in animal-derived foods, in order to solve the problem mentioned in the background art that existing drug residue detection devices require a long time and are cumbersome to use, which involves preparing an extract and then using a syringe-type purification column to adsorb interfering substances to obtain the analyte that meets the requirements.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a syringe-type purification column for detecting multiple drug residues in animal-derived foods, comprising a syringe body and a packing assembly. A piston head is installed inside the syringe body, a piston rod is installed on the top of the piston head, and a push handle is installed on the top of the piston rod. Handles are installed on both sides of the upper part of the outer wall of the syringe body. A first threaded groove is provided on the inner wall of the lower part of the syringe body. The packing assembly includes a tube body, and a first external thread is installed on the outer wall of the upper part of the tube body. The packing assembly is connected via the first threaded groove. The groove and the first external thread are threadedly connected to the syringe body. An upper sieve plate is installed on the upper part of the inner tube body. A reinforcing ring is installed on the top of the upper sieve plate. A lower sieve plate is installed on the lower part of the inner tube body. A packing layer is installed between the upper sieve plate and the lower sieve plate. A microporous filter membrane is installed on the top of the lower sieve plate. A fixing ring is installed on the bottom of the lower sieve plate. An injection head is installed on the bottom of the fixing ring. A second external thread is installed on the lower part of the outer wall of the injection head. A plug is installed on the lower part of the injection head. A second thread groove is provided on the upper part of the inner wall of the plug.
[0006] Preferably, a sealing ring is installed on the outer wall of the piston head, and the outer wall of the sealing ring is in contact with the inner wall of the syringe body.
[0007] Preferably, multiple sets of reinforcing rods are installed between the top of the piston head and the piston push rod.
[0008] Preferably, a reinforcing rib is installed between the top of the handle and the syringe body.
[0009] Preferably, the upper sieve plate and the lower sieve plate are provided with through holes of a certain diameter inside, and the upper sieve plate and the lower sieve plate are mesh structures with a certain diameter.
[0010] Preferably, a first rubber ring is installed between the outer wall of the upper sieve plate and the inner wall of the tube, and a second rubber ring is installed between the outer wall of the lower sieve plate and the inner wall of the tube.
[0011] Preferably, a rubber pad is installed at the inner bottom of the plug.
[0012] Preferably, a sealing sleeve is installed on the outer wall of the syringe body, and an insulated cavity is provided inside the sealing sleeve. Liquid inlets are installed on both sides of the top of the sealing sleeve, and a valve is installed on the top of the liquid inlets.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] (1) This utility model fixes the syringe body and the tube body together by means of the first threaded groove and the first external thread. The operator holds the syringe body with one hand and pulls the push handle with the other hand to move the piston rod upward. The piston rod can move the piston head upward, so that the liquid can be drawn into the syringe body through the injection head. The sealing ring can improve the vacuum between the piston head and the lower part of the syringe body, thereby ensuring the sealing of the liquid. The liquid can be purified and filtered by the upper sieve plate, the packing layer and the lower sieve plate to remove substances such as fat and protein, and prevent impurities from interfering with the subsequent drug residue detection results. This solves the problem that the existing drug residue detection device requires a long time and is cumbersome to prepare the extract first and then use the filter column to adsorb the interfering substances to obtain the test substance that meets the requirements.
[0015] (2) The injection head and the plug are fixedly connected by the second external thread and the second thread groove. The rubber gasket can improve the stability and sealing of the connection between the injection head and the plug, and can seal the purification liquid, which is convenient for testing the purification liquid.
[0016] (3) By opening the valve, hot water can be injected into the heat-insulating cavity through the liquid inlet, thereby heating the syringe body and ensuring that the purified liquid inside the syringe body is at a suitable temperature, thus improving the reliability of the test results. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a front cross-sectional view of the present invention.
[0019] Figure 3 This is a schematic diagram of the internal structure of the syringe body in this utility model;
[0020] Figure 4 This is a schematic diagram of the internal structure of the packing assembly in this utility model;
[0021] In the diagram: 1. Syringe body; 2. Piston head; 3. Sealing ring; 4. Piston push rod; 5. Reinforcing rod; 6. Push handle; 7. Handle; 8. Reinforcing rib; 9. First threaded groove; 10. Packing assembly; 11. Tube body; 12. First external thread; 13. Upper sieve plate; 14. First rubber ring; 15. Reinforcing ring; 16. Lower sieve plate; 17. Second rubber ring; 18. Packing layer; 19. Microporous filter membrane; 20. Fixing ring; 21. Injection head; 22. Second external thread; 23. Plug; 24. Second threaded groove; 25. Rubber gasket; 26. Sealing sleeve; 27. Insulation cavity; 28. Liquid inlet; 29. Valve. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Please see Figure 1-4This utility model provides an embodiment of a syringe-type purification column for detecting multiple drug residues in animal-derived foods. The column includes a syringe body 1 and a packing assembly 10. A piston head 2 is installed inside the syringe body 1, and a sealing ring 3 is installed on the outer wall of the piston head 2. The outer wall of the sealing ring 3 is in contact with the inner wall of the syringe body 1. A piston push rod 4 is installed on the top of the piston head 2, and a push handle 6 is installed on the top of the piston push rod 4. Handles 7 are installed on both sides of the upper part of the outer wall of the syringe body 1. A first threaded groove 9 is provided on the lower inner wall of the syringe body 1. The packing assembly 10 includes a tube body 11, and a first external thread 12 is installed on the upper outer wall of the tube body 11. The packing assembly 10 is threadedly connected to the syringe body 1 through the first threaded groove 9 and the first external thread 12. When using this device… The syringe body 1 and the tube body 11 are fixedly connected by the first threaded groove 9 and the first external thread 12. The operator holds the syringe body 1 with one hand and pulls the push handle 6 with the other hand to move the piston rod 4 upward. The piston rod 4 can move the piston head 2 upward, so that the liquid can be drawn into the syringe body 1 through the injection head 21. The sealing ring 3 can improve the vacuum degree between the piston head 2 and the lower part of the syringe body 1, thereby ensuring the liquid is sealed. An upper sieve plate 13 is installed in the upper part of the tube body 11. A reinforcing ring 15 is installed on the top of the upper sieve plate 13. The reinforcing ring 15 can limit the upper sieve plate 13 to prevent it from shifting and affecting the filtration of the liquid. A lower sieve plate 16 is installed in the lower part of the tube body 11. The upper sieve plate 13 and The lower sieve plate 16 has through holes of a certain diameter inside. The upper sieve plate 13 and the lower sieve plate 16 are mesh structures with a certain diameter. The upper sieve plate 13 and the lower sieve plate 16 can prevent the packing material from coming out and prevent large particles from entering, thus playing a filtering and blocking role. A first rubber ring 14 is installed between the outer wall of the upper sieve plate 13 and the inner wall of the tube body 11, and a second rubber ring 17 is installed between the outer wall of the lower sieve plate 16 and the inner wall of the tube body 11. The first rubber ring 14 and the second rubber ring 17 can seal the gaps between the upper sieve plate 13 and the lower sieve plate 16 and the tube body 11, preventing liquid from leaking out from the gaps. A packing layer 18 is installed between the upper sieve plate 13 and the lower sieve plate 16, and a microporous filter membrane 19 is installed on the top of the lower sieve plate 16. The purification solution can be filtered to prevent solution particles from clogging the instrument. A fixing ring 20 is installed at the bottom of the lower sieve plate 16 to limit the lower sieve plate 16 and prevent it from falling. An injection head 21 is installed at the bottom of the fixing ring 20. When the liquid is drawn into the syringe body 1 through the injection head 21, it is purified and filtered through the upper sieve plate 13, the packing layer 18, and the lower sieve plate 16 to remove substances such as fat and protein, preventing impurities from interfering with the subsequent drug residue detection results. A second external thread 22 is installed on the lower part of the outer wall of the injection head 21, and a plug 23 is installed at the lower part of the injection head 21. A second threaded groove 24 is provided on the upper part of the inner wall of the plug 23, and a rubber pad 25 is installed at the inner bottom of the plug 23. After the purification solution is extracted,The injection head 21 and the plug 23 can be fixedly connected via the second external thread 22 and the second thread groove 24. The rubber gasket 25 improves the stability and sealing of the connection between the injection head 21 and the plug 23. A sealing sleeve 26 is installed on the outer wall of the syringe body 1. An insulating cavity 27 is provided inside the sealing sleeve 26. Liquid inlets 28 are installed on both sides of the top of the sealing sleeve 26. A valve 29 is installed on the top of the liquid inlet 28. Opening the valve 29 allows hot water to be injected into the insulating cavity 27 through the liquid inlet 28, thereby heating the syringe body 1 and ensuring that the purified liquid inside the syringe body 1 is at a suitable temperature, thus improving the reliability of the test results.
[0024] Please see Figure 3 Multiple sets of reinforcing rods 5 are installed between the top of the piston head 2 and the piston push rod 4. The reinforcing rods 5 can improve the stability of the connection between the piston head 2 and the piston push rod 4, and also improve the efficiency of the device in extracting purified liquid.
[0025] Please see Figure 2 A reinforcing rib 8 is installed between the top of the handle 7 and the syringe body 1. The reinforcing rib 8 can effectively improve the stability of the connection between the handle 7 and the syringe body 1, prevent the handle 7 from breaking during use, and improve the user's comfort when using the device.
[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A syringe type purification column for detecting multiple drug residues in animal-derived food, comprising a syringe body (1) and a filler assembly (10), characterized in that: The inside of the needle cylinder body (1) is internally provided with a piston head (2), the top of the piston head (2) is provided with a piston push rod (4), the top of the piston push rod (4) is provided with a push handle (6), the upper part of the outer wall of the needle cylinder body (1) is provided with a handle (7) on both sides, the lower part of the inner wall of the needle cylinder body (1) is provided with a first threaded groove (9), the filler assembly (10) comprises a tube body (11), the outer wall of the upper part of the tube body (11) is provided with a first external thread (12), the filler assembly (10) is screwed with the needle cylinder body (1) through the first threaded groove (9) and the first external thread (12), the upper part of the inside of the tube body (11) is provided with an upper sieve plate (13), the top of the upper sieve plate (13) is provided with a reinforcing ring (15), the lower part of the inside of the tube body (11) is provided with a lower sieve plate (16), the filler layer (18) is arranged between the upper sieve plate (13) and the lower sieve plate (16), the top of the lower sieve plate (16) is provided with a microporous filter membrane (19), the bottom of the lower sieve plate (16) is provided with a fixing ring (20), the bottom of the fixing ring (20) is provided with an injection head (21), the lower part of the outer wall of the injection head (21) is provided with a second external thread (22), the lower part of the injection head (21) is provided with a plug (23), the upper part of the inner wall of the plug (23) is provided with a second threaded groove (24).
2. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: The outer wall of the piston head (2) is provided with a sealing ring (3), and the outer wall of the sealing ring (3) is attached to the inner wall of the needle cylinder body (1).
3. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: A plurality of reinforcing rods (5) are arranged between the top of the piston head (2) and the piston push rod (4).
4. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: A reinforcing rib (8) is arranged between the top of the handle (7) and the needle cylinder body (1).
5. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: The inside of the upper sieve plate (13) and the lower sieve plate (16) is provided with through holes with a certain pore size, and the upper sieve plate (13) and the lower sieve plate (16) are grid structures with a certain pore size.
6. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: A first rubber ring (14) is arranged between the outer wall of the upper sieve plate (13) and the inner wall of the tube body (11), and a second rubber ring (17) is arranged between the outer wall of the lower sieve plate (16) and the inner wall of the tube body (11).
7. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: The inner bottom of the plug (23) is provided with a rubber pad (25).
8. The needle-cylinder purification column for detecting multiple drug residues in animal-derived food according to claim 1, characterized in that: The outer wall of the needle cylinder body (1) is provided with a sealing sleeve (26), the inside of the sealing sleeve (26) is provided with a heat preservation cavity (27), the top of the sealing sleeve (26) is provided with a liquid inlet (28) on both sides, and the top of the liquid inlet (28) is provided with a valve (29).