Pretreatment device for veterinary drug residue detection

Abstract

The utility model discloses a pretreatment device for veterinary drug residue detection, which comprises a treatment cylinder, heating rods are arranged on two sides of the treatment cylinder, and the heating rods extend into the treatment cylinder; a stirring motor is arranged in the middle of the upper end of the treatment cylinder, and a stirring rod is arranged at the output end of the stirring motor; a nitrogen adding device is arranged at the bottom of the treatment barrel and comprises a nitrogen adding box and a compressed nitrogen tank, and the nitrogen adding box and the compressed nitrogen tank are connected through a connecting pipe; a plurality of exhaust holes are uniformly formed in the upper end of the nitrogen adding box; an electric telescopic rod is arranged at the bottom of the nitrogen adding box, a sealing plate is arranged at the output end of the electric telescopic rod, and a sealing gasket is arranged at the upper end of the sealing plate. A test solution in the treatment cylinder is heated and stirred through the heating rod and the stirring rod, so that the test solution can be uniformly heated, and the concentration of the test solution is facilitated; the nitrogen adding device can add nitrogen into the treatment cylinder, so that an organic solvent in the test solution is quickly volatilized, and the concentration efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of veterinary drug detection, in particular to a pre-treatment device for veterinary drug residue detection. Background Art

[0002] Sample pretreatment technology is one of the key technologies in veterinary drug residue analysis. Its purpose is to convert the target compound in the sample into a test solution that can be used for instrumental analysis. The existing pretreatment technologies can be summarized into four categories, namely preparation technology, extraction technology, purification technology and concentration technology. The volume of the test solution after preparation, extraction and purification is doubled compared to that before purification. In order to increase the concentration of the target compound in the test solution, the test solution needs to be concentrated.

[0003] A pre-treatment device for veterinary drug residue detection is disclosed in a Chinese utility model patent with announcement number CN 217717193 U, including: a treatment box and a compressed nitrogen tank, a sealing cover is provided on one side of the treatment box, and a fixed plate is symmetrically provided on the inner wall of the middle part of the side of the treatment box away from the sealing cover. The beneficial effect of the utility model is that water is added to the treatment box, and the height of the water is flush with the height of the fixed plate, the electric telescopic rod works to completely insert the air outlet pipe into the test solution, and the compressed nitrogen tank works to make nitrogen fully contact with the test solution through the air outlet, so that the organic solvent evaporates and the test solution is fully concentrated. In view of the above-mentioned related technologies, the inventor believes that there are the following defects: since nitrogen will always move upward in the test solution, the efficiency of the nitrogen adding device to merge nitrogen with the test solution is not high, which affects the speed of volatilization of the organic solvent in the test solution, and the test solution is heated by a water bath, the heating speed is slow, and it is also easy to produce more water droplets falling into the test solution, affecting the concentration efficiency of the test solution. Utility Model Content

[0004] The purpose of the utility model is to provide a pre-treatment device for detecting veterinary drug residues to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-treatment device for veterinary drug residue detection, comprising a treatment cylinder, a support leg is provided at the bottom of the treatment cylinder, heating rods are provided on both sides of the treatment cylinder, and the heating rods extend into the interior of the treatment cylinder;

[0006] A stirring motor is provided in the middle of the upper end of the treatment cylinder, and a stirring rod is provided at the output end of the stirring motor, and the stirring rod extends into the interior of the treatment cylinder;

[0007] A nitrogen adding device is provided at the bottom of the treatment cylinder, and the nitrogen adding device comprises a nitrogen adding box and a compressed nitrogen tank, and the nitrogen adding box and the compressed nitrogen tank are connected by a connecting pipe;

[0008] A plurality of exhaust holes are evenly arranged on the upper end of the nitrogen adding box;

[0009] An electric telescopic rod is arranged at the bottom of the nitrogen adding box, a sealing plate is arranged at the output end of the electric telescopic rod, and a sealing gasket is arranged at the upper end of the sealing plate.

[0010] Preferably, the nitrogen adding box comprises a sealing chamber and an air inlet chamber, wherein the sealing chamber is located at the upper end of the air inlet chamber, and the diameter of the sealing chamber is smaller than the diameter of the air inlet chamber, and a chamfer is provided at the connection between the sealing chamber and the air inlet chamber.

[0011] Preferably, a fixing ring is provided at the bottom of the processing cylinder, and the sealing chamber is fixedly mounted on the fixing ring.

[0012] Preferably, a feed port is provided at the upper end of the processing cylinder, and the feed port is funnel-shaped, a first sealing plug matching the shape of the feed port is provided inside the feed port, and a first pull ring is provided at the upper end of the first sealing plug.

[0013] Preferably, a discharge port is provided on one side of the lower end of the processing cylinder, a second sealing plug is provided inside the discharge port, one end of the second sealing plug is provided with a thread, and the second sealing plug is tightened with the discharge port through the thread, and a second pull ring is provided at the outer end of the second sealing plug.

[0014] Preferably, an exhaust port is provided at the upper end of the treatment cylinder, and the exhaust port is connected to a filter.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model heats the test solution in the treatment cylinder by the heating rod, and reduces the test solution in the treatment cylinder by half by the stirring rod, so that the test solution can be heated evenly, the heating speed is fast, and it is conducive to the concentration of the test solution;

[0017] The nitrogen adding device can add nitrogen into the treatment cylinder. During the test solution concentration process, the concentration speed is accelerated by adding nitrogen into the test solution. The electric telescopic rod drives the sealing plate and the sealing gasket located at the upper end of the sealing plate to rise and fall, and the exhaust hole can be closed and opened to control the addition and stop of nitrogen, so that the organic solvent in the test solution can evaporate quickly and the concentration efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the nitrogen adding device of the utility model.

[0021] In the figure: 1. treatment cylinder; 2. support leg; 3. heating rod; 4. stirring motor; 5. stirring rod; 6. nitrogen adding box; 61. exhaust hole; 62. sealing chamber; 63. air inlet chamber; 7. compressed nitrogen tank; 8. connecting pipe; 9. electric telescopic rod; 10. sealing plate; 11. sealing gasket; 12. fixing ring; 13. feed port; 14. first sealing plug; 15. first pull ring; 16. discharge port; 17. second sealing plug; 18. second pull ring; 19. exhaust port; 20. filter. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-3 The utility model provides a technical solution: a pre-treatment device for veterinary drug residue detection, comprising a treatment tube 1, a support leg 2 is provided at the bottom of the treatment tube 1, heating rods 3 are provided on both sides of the treatment tube 1, and the heating rods 3 extend into the interior of the treatment tube 1.

[0024] A stirring motor 4 is provided at the middle of the upper end of the treatment cylinder 1 , and a stirring rod 5 is provided at the output end of the stirring motor 4 . The stirring rod 5 extends into the interior of the treatment cylinder 1 .

[0025] A feed port 13 is provided at the upper end of the treatment cylinder 1 , and the feed port 13 is funnel-shaped. A first sealing plug 14 matching the shape of the feed port 13 is provided inside the feed port 13 , and a first pull ring 15 is provided at the upper end of the first sealing plug 14 .

[0026] A discharge port 16 is provided at one side of the lower end of the processing cylinder 1, and a second sealing plug 17 is provided inside the discharge port 16. One end of the second sealing plug 17 is provided with a thread, and the second sealing plug 17 is tightened with the discharge port 16 through the thread. A second pull ring 18 is provided at the outer end of the second sealing plug 17.

[0027] An exhaust port 19 is provided at the upper end of the treatment tube 1 , and a filter 20 is connected to the exhaust port 19 .

[0028] Among them, the heating rod 3 is used to heat the test solution inside the treatment tube 1, and the stirring rod 5 is provided with a plurality of stirring blades for stirring the test solution inside the treatment tube 1, so that the heating rod 3 can evenly heat the test solution; when in use, the first sealing plug 14 is opened through the first pull ring 15, and the test solution is poured into the treatment tube 1 from the feed port 13, and the heating rod 3 is energized so that the heating rod 3 heats the test solution to accelerate the concentration of the test solution, and the stirring motor 4 is started, and the stirring motor 4 drives the stirring rod 5 to rotate to stir the test solution, so that the test solution can be evenly heated, and the water vapor generated by the test solution is filtered through the filter 20 and discharged through the exhaust port 19. After the test solution is concentrated, the second pull ring 18 is rotated to disengage the second sealing plug 17 from the thread of the discharge port 16, and the second sealing plug 17 is pulled out, and the test solution flows out from the discharge port 16, waiting for subsequent detection.

[0029] A nitrogen adding device is provided at the bottom of the treatment tube 1 , and the nitrogen adding device comprises a nitrogen adding box 6 and a compressed nitrogen tank 7 , and the nitrogen adding box 6 and the compressed nitrogen tank 7 are connected via a connecting pipe 8 .

[0030] A plurality of exhaust holes 61 are evenly arranged at the upper end of the nitrogen adding box 6 .

[0031] An electric telescopic rod 9 is provided at the bottom of the nitrogen adding box 6 , a sealing plate 10 is provided at the output end of the electric telescopic rod 9 , and a sealing pad 11 is provided at the upper end of the sealing plate 10 .

[0032] The nitrogen adding box 6 includes a sealing chamber 62 and an air inlet chamber 63 . The sealing chamber 62 is located at the upper end of the air inlet chamber 63 , and the diameter of the sealing chamber 62 is smaller than the diameter of the air inlet chamber 63 . A chamfer is provided at the connection between the sealing chamber 62 and the air inlet chamber 63 .

[0033] A fixing ring 12 is provided at the bottom of the processing cylinder 1 , and the sealing chamber 62 is fixedly mounted on the fixing ring 12 .

[0034] The nitrogen adding device is used to add nitrogen into the processing cylinder 1. During the test solution concentration process, the concentration speed is accelerated by adding nitrogen into the test solution. The exhaust hole 61 is used to discharge nitrogen. The sealing chamber 62 is used to seal the exhaust hole 61. The electric telescopic rod 9 drives the sealing plate 10 and the sealing gasket 11 at the upper end of the sealing plate 10 to rise and fall to close and open the exhaust hole 61.

[0035] When in use, the electric telescopic rod 9 drives the sealing plate 10 and the sealing pad 11 located at the upper end of the sealing plate 10 to descend, and the nitrogen in the compressed nitrogen tank 7 enters the air inlet bin 63 through the connecting pipe 8, and the nitrogen enters the sealing bin 62 from the side inside the air inlet bin 63, and then is discharged into the processing tube 1 through the exhaust hole 61, so that the organic solvent in the test solution evaporates quickly.

[0036] The working principle and use process of this utility model:

[0037] When in use, the first sealing plug 14 is opened through the first pull ring 15, and the test solution is poured into the processing cylinder 1 from the feed port 13, and the heating rod 3 is energized so that the heating rod 3 heats the test solution to accelerate the concentration of the test solution, and the stirring motor 4 is started. The stirring motor 4 drives the stirring rod 5 to rotate and stir the test solution so that the test solution can be evenly heated. The water vapor generated by the test solution is filtered through the filter 20 and discharged through the exhaust port 19. After the test solution is concentrated, the second pull ring 18 is rotated to make the second sealing plug 17 and the thread of the discharge port 16 meet. Disengage, pull out the second sealing plug 17, the test solution flows out from the discharge port 16, and waits for subsequent testing; in the process of test solution concentration, nitrogen is added to the test solution to accelerate the concentration speed, the electric telescopic rod 9 drives the sealing plate 10 and the sealing gasket 11 located at the upper end of the sealing plate 10 to descend, and the nitrogen in the compressed nitrogen tank 7 enters the air inlet bin 63 through the connecting pipe 8, and the nitrogen enters the sealing bin 62 from the side inside the air inlet bin 63, and then is discharged into the processing tube 1 through the exhaust hole 61, so that the organic solvent in the test solution evaporates quickly.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-treatment device for detecting veterinary drug residues, comprising a treatment tube (1), wherein a support leg (2) is provided at the bottom of the treatment tube (1), characterized in that: Heating rods (3) are provided on both sides of the treatment tube (1), and the heating rods (3) extend into the interior of the treatment tube (1); A stirring motor (4) is provided at the middle of the upper end of the treatment cylinder (1); a stirring rod (5) is provided at the output end of the stirring motor (4); the stirring rod (5) extends into the interior of the treatment cylinder (1); A nitrogen adding device is provided at the bottom of the treatment cylinder (1), the nitrogen adding device comprising a nitrogen adding box (6) and a compressed nitrogen tank (7), the nitrogen adding box (6) and the compressed nitrogen tank (7) being connected via a connecting pipe (8); A plurality of exhaust holes (61) are evenly arranged at the upper end of the nitrogen addition box (6); An electric telescopic rod (9) is provided at the bottom of the nitrogen addition box (6), a sealing plate (10) is provided at the output end of the electric telescopic rod (9), and a sealing gasket (11) is provided at the upper end of the sealing plate (10).

2. A pre-treatment device for veterinary drug residue detection according to claim 1, characterized in that: The nitrogen addition box (6) comprises a sealing chamber (62) and an air intake chamber (63); the sealing chamber (62) is located at the upper end of the air intake chamber (63); the diameter of the sealing chamber (62) is smaller than the diameter of the air intake chamber (63); and a chamfer is provided at the connection between the sealing chamber (62) and the air intake chamber (63).

3. A pre-treatment device for veterinary drug residue detection according to claim 2, characterized in that: A fixing ring (12) is provided at the bottom of the treatment cylinder (1), and the sealing chamber (62) is fixedly mounted on the fixing ring (12).

4. A pre-treatment device for veterinary drug residue detection according to claim 1, characterized in that: The upper end of the treatment cylinder (1) is provided with a feed port (13), and the feed port (13) is funnel-shaped. A first sealing plug (14) matching the shape of the feed port (13) is provided inside the feed port (13), and a first pull ring (15) is provided at the upper end of the first sealing plug (14).

5. A pre-treatment device for veterinary drug residue detection according to claim 1, characterized in that: A discharge port (16) is provided at one side of the lower end of the treatment cylinder (1), a second sealing plug (17) is provided inside the discharge port (16), one end of the second sealing plug (17) is provided with a thread, and the second sealing plug (17) and the discharge port (16) are tightened by the thread, and a second pull ring (18) is provided at the outer end of the second sealing plug (17).

6. A pre-treatment device for veterinary drug residue detection according to claim 1, characterized in that: An exhaust port (19) is provided at the upper end of the treatment cylinder (1), and the exhaust port (19) is connected to a filter (20).

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