Agricultural product pesticide residue enrichment device

Abstract

The utility model discloses an agricultural product pesticide residue enrichment device which comprises an enrichment machine shell, a water bath is formed in the top end of the enrichment machine shell, a height rod is fixedly installed at the top end of the inner wall of the water bath, a sliding block is connected to the surface of the height rod in a sliding mode, a sample containing machine shell is fixedly installed on one side of the sliding block, and a lifting table is installed in the middle of the height rod. The agricultural product pesticide residue enrichment device comprises a sample placing machine shell, a lifting platform is fixedly installed on the surface of the sample placing machine shell, a plurality of nitrogen injection pipes are fixedly installed on the surface of the lifting platform, the bottom ends of the nitrogen injection pipes are all fixedly communicated with nitrogen blowing heads, and a plurality of sample fixing assemblies are fixedly installed in the sample placing machine shell. The pushing shell rotates relative to the rotating screw, the pushing shell pushes the sample placing machine shell from the bottom, the height of a sample tube in the sample placing machine shell is adjusted, traditional manual height adjusting operation is replaced, and the detection efficiency of the enrichment device is improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product processing technology, specifically to a device for enriching pesticide residues in agricultural products. Background Technology

[0002] The main function of pesticide residue enrichment devices is to enrich and concentrate pesticide residues in samples, thereby improving the sensitivity and accuracy of detection. Specifically, pesticide residue enrichment devices significantly improve detection efficiency and accuracy by reducing sample volume, removing interfering substances, and enriching target compounds. These devices typically employ techniques such as solid-phase extraction (SPE) and nitrogen purging. SPE utilizes the adsorption properties of a suitable SPE column to remove interfering substances from the sample and enrich the target compounds. Nitrogen purging devices concentrate the target compounds by purging the sample with nitrogen gas, causing the solvent to evaporate. These technologies are widely used in agricultural product processing.

[0003] However, traditional pesticide residue enrichment devices have the following drawbacks:

[0004] Traditional pesticide residue enrichment devices involve the following steps for sample placement: if the support tray is too low, loosen the two positioning screws on the center ring of the support tray, raise the support tray until the bottom of the test tube is on the tray and no less than 15mm from the positioning frame, adjust the support tray so that the slit is aligned with the test tube, tighten the positioning screws again to fix the support tray. This operation is very cumbersome. Utility Model Content

[0005] The purpose of this utility model is to provide a pesticide residue enrichment device for agricultural products, in order to solve the problem mentioned in the background art that the traditional pesticide residue enrichment device has the following operation: if the support tray is too low, loosen the two positioning screws on the center ring of the support tray, raise the support tray until the bottom of the test tube is on the tray and not less than 15mm away from the positioning frame, adjust the support tray so that the slit is aligned with the test tube, and tighten the positioning screws again to fix the support tray. This operation is very cumbersome.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an agricultural product pesticide residue enrichment device, comprising an enrichment housing, a water bath tank at the top of the enrichment housing, a height rod fixedly installed at the top of the inner wall of the water bath tank, a sliding block slidably connected to the surface of the height rod, a sample placement housing fixedly installed on one side of the sliding block, a lifting platform installed in the middle of the height rod, a plurality of nitrogen spray pipes fixedly installed on the surface of the lifting platform, nitrogen nozzles fixedly connected to the bottom ends of the plurality of nitrogen spray pipes, a plurality of sample fixing components fixedly installed inside the sample placement housing, support legs fixedly installed at the four corners of the bottom of the enrichment housing, a lifting assembly fixedly installed between the four support legs, the lifting assembly comprising a positioning plate and two screws, the two sides of the top of the positioning plate being rotatably connected to the bottom ends of the two screws respectively, and the top ends of the two screws being threadedly connected to a push shell slidably connected to the enrichment housing.

[0007] Preferably, a motor frame is fixedly installed at the center of the top of the positioning plate, a stepper motor is fixedly installed at the top of the motor frame, a rotating shaft is fixedly installed through the output end of the stepper motor, a drive pulley is fixedly installed at the center of the rotating shaft, and driven pulleys are fixedly installed on the surfaces of both screws. A connecting belt is connected between the two driven pulleys and the drive pulley. When the stepper motor is powered on, it starts and drives the rotating shaft to rotate. The rotating shaft drives the drive pulley to rotate, and the drive pulley drives the driven pulley to rotate through the connecting belt. The driven pulley drives the screw to rotate. The thread on the surface of the screw matches the thread on the inner wall of the push housing, and the push housing slides relative to the enrichment housing. Therefore, the screw slides relative to the push housing. The push housing pushes the sample placement housing from the bottom. The sample placement housing slides relative to the height rod through the sliding block to adjust the height of the sample tube.

[0008] Preferably, the top ends of the two push shells are fixedly connected to the two sides of the bottom end of the sample placement machine housing, and the two ends of the positioning plate are fixedly connected to the four support legs, and the lifting assembly is installed on the support legs through the positioning plate.

[0009] Preferably, each of the sample fixing components includes a fixing platform and two assembly blocks. Two ends of one side of the fixing platform are fixedly connected to one end of each of the two assembly blocks. A first clamping plate is fixedly installed in the middle of one side of the fixing platform. A vertical plate is fixedly installed at one end of one side of each of the two assembly blocks. Displacement blocks are slidably connected to opposite sides of the two vertical plates. Assembly shells are fixedly installed on opposite sides of the two displacement blocks. Movable grooves are opened at the other ends of one side of each of the two assembly blocks. Lead screws are rotatably connected inside each of the two movable grooves. The top ends of the two lead screws are threadedly connected to threaded holes at the bottom ends of the two assembly shells. A second clamping plate is fixedly installed between the two assembly shells. Driven bevel gears are fixedly installed on the surfaces of the two lead screws. Driving bevel gears are rotatably connected to one side of the inner wall of each of the two movable grooves. The surfaces of the two assembly shells... Each of the two fixed platforms is equipped with a waterproof motor housing. Inside each of the two waterproof motor housings is a micro motor. The output ends of the two micro motors are respectively fixedly connected to one end of two active bevel helical gears. The outer sides of the two active bevel helical gears are respectively meshed with the outer sides of two driven bevel helical gears. The other side of the fixed platform is fixedly connected to the sample placement housing. When the micro motors are powered on, they start and drive the active bevel helical gears to rotate. The active bevel helical gears contact the driven bevel helical gears, causing them to rotate. The driven bevel helical gears then drive the lead screw to rotate. The threads on the lead screw surface match the threads on the inner wall of the assembly housing. The assembly housing slides relative to the vertical plate via a displacement block and relative to the lead screw, adjusting the distance between the first and second clamping plates. The first and second clamping plates clamp and fix the sample tube from both sides.

[0010] Preferably, an air pump is fixedly installed at the top of the height rod, and mounting seats are installed on both sides of the air pump. A collecting roller is rotatably connected inside each of the two mounting seats. Several steel wire ropes are wound around the surface of each of the two collecting rollers. The bottom ends of the steel wire ropes are fixedly connected to the top of the nitrogen injection pipe. A connecting hose is fixedly connected to the surface of the air pump. The air pump draws nitrogen through the connecting hose, and the drawn nitrogen is sprayed out through the nitrogen nozzle on the nitrogen injection pipe. The steel wire ropes are wound around the collecting rollers, thus completing the height adjustment of the nitrogen injection pipe.

[0011] Preferably, a heating plate is fixedly installed inside the water bath. When the heating plate is powered on, the heating wire inside the heating plate is powered on and heats up, heating the water in the water bath and completing the heating of the sample.

[0012] Preferably, a control panel is fixedly installed on one side of the enrichment housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by setting up a lifting component, the shell is pushed to rotate relative to the rotating screw, and the shell pushes the sample placement housing from the bottom, thereby adjusting the height of the sample tube inside the sample placement housing, replacing the traditional manual height adjustment operation, and improving the detection efficiency of the enrichment device. Attached Figure Description

[0014] Figure 1 This is a side view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a side view of the lifting assembly of this utility model;

[0017] Figure 4 This is a cross-sectional view of the sample fixing assembly of this utility model;

[0018] Figure 5 This is a side view of the sample fixing assembly of this utility model.

[0019] In the diagram: 1. Enrichment housing; 2. Control panel; 3. Support leg; 4. Lifting assembly; 41. Positioning plate; 42. Screw; 43. Push housing; 44. Stepper motor; 45. Motor frame; 46. Driven pulley; 47. Connecting belt; 48. Driven pulley; 49. Shaft; 5. Sample placement housing; 6. Height bar; 7. Air pump; 8. Mounting base; 9. Collection roller; 10. Steel wire rope; 11. Lifting platform; 12. Nitrogen injection pipe; 13. Nitrogen nozzle; 14. Connecting hose; 15. Sample fixing assembly; 1501. Fixing platform; 1502. Assembly block; 1503. Waterproof motor housing; 1504. Micro motor; 1505. Vertical plate; 1506. Displacement block; 1507. Assembly shell; 1508. Second clamping plate; 1509. Threaded hole; 1510. Lead screw; 1511. Driven bevel helical gear; 1512. Driven bevel helical gear; 1513. Movable groove; 1514. First clamping plate; 16. Sliding block; 17. Heating plate; 18. Water bath. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1-5This utility model provides a pesticide residue enrichment device for agricultural products, including an enrichment housing 1. A water bath 18 is provided at the top of the enrichment housing 1. A height rod 6 is fixedly installed at the top of the inner wall of the water bath 18. A sliding block 16 is slidably connected to the surface of the height rod 6. A sample placement housing 5 is fixedly installed on one side of the sliding block 16. A lifting platform 11 is installed in the middle of the height rod 6. A plurality of nitrogen spray pipes 12 are fixedly installed on the surface of the lifting platform 11. A nitrogen nozzle 13 is fixedly connected to the bottom end of each of the plurality of nitrogen spray pipes 12. A plurality of sample fixing components 15 are fixedly installed inside the sample placement housing 5. Support legs 3 are fixedly installed at the four corners of the bottom of the enrichment housing 1. A lifting component 4 is fixedly installed between the four support legs 3. The lifting component 4 includes a positioning plate 41 and two screws 42. The two sides of the top of the positioning plate 41 are rotatably connected to the bottom ends of the two screws 42 respectively. The top ends of the two screws 42 are threadedly connected to a push shell 43 that is slidably connected to the enrichment housing 1.

[0022] A motor frame 45 is fixedly mounted at the center of the top of the positioning plate 41. A stepper motor 44 is fixedly mounted at the top of the motor frame 45. A rotating shaft 49 is fixedly mounted through the output end of the stepper motor 44, passing through the motor frame 45. A drive pulley 48 is fixedly mounted at the center of the rotating shaft 49. Driven pulleys 46 are fixedly mounted on the surfaces of the two screws 42. A connecting belt 47 is connected between the two driven pulleys 46 and the drive pulley 48. When the stepper motor 44 is powered on, it starts and drives the rotating shaft 49 to rotate. The active pulley 48 is driven to rotate, and the active pulley 48 drives the driven pulley 46 to rotate via the connecting belt 47. The driven pulley 46 drives the screw 42 to rotate. The thread on the surface of the screw 42 matches the thread on the inner wall of the push housing 43. The push housing 43 slides relative to the enrichment housing 1, so the screw 42 slides relative to the push housing 43. The push housing 43 pushes the sample placement housing 5 from the bottom. The sample placement housing 5 slides relative to the height rod 6 via the sliding block 16 to adjust the height of the sample tube.

[0023] The tops of the two push shells 43 are fixedly connected to the two sides of the bottom of the sample placement housing 5, respectively. The two ends of the positioning plate 41 are fixedly connected to the four support legs 3, respectively. The lifting assembly 4 is installed on the support legs 3 through the positioning plate 41.

[0024] Each of the sample fixing components 15 includes a fixing platform 1501 and two assembly blocks 1502. Two ends of one side of the fixing platform 1501 are fixedly connected to one end of each of the two assembly blocks 1502. A first clamping plate 1514 is fixedly installed in the middle of one side of the fixing platform 1501. A vertical plate 1505 is fixedly installed at one end of one side of each of the two assembly blocks 1502. Displacement blocks 1506 are slidably connected to opposite sides of the two vertical plates 1505. Assembly shells 1507 are fixedly installed on opposite sides of the two displacement blocks 1506. The other end of one side of each of the two assembly blocks 1502... Each assembly housing 1507 has a movable slot 1513, and a lead screw 1510 is rotatably connected inside each slot 1513. The top ends of the two lead screws 1510 are threadedly connected to threaded holes 1509 at the bottom ends of the two assembly housings 1507. A second clamping plate 1508 is fixedly installed between the two assembly housings 1507. A driven bevel gear 1511 is fixedly installed on the surface of each lead screw 1510. A driving bevel gear 1512 is rotatably connected to one side of the inner wall of each of the two movable slots 1513. A waterproof motor housing 1 is fixedly installed on the surface of each of the two assembly housings 1507. 503, two waterproof motor housings 1503 each have a micro motor 1504 fixedly installed inside. The output ends of the two micro motors 1504 are respectively fixedly connected to one end of two active bevel helical gears 1512. The outer sides of the two active bevel helical gears 1512 are respectively meshed with the outer sides of two driven bevel helical gears 1511. The other side of the fixed platform 1501 is fixedly connected to the sample placement housing 5. When the micro motors 1504 are powered on, they start and drive the active bevel helical gears 1512 to rotate. The active bevel helical gears 1512 mesh with the driven bevel helical gears 1511. When the bevel helical gear 1511 contacts, the driven bevel helical gear 1511 rotates, which drives the lead screw 1510 to rotate. The thread on the surface of the lead screw 1510 matches the thread on the inner wall of the assembly shell 1507. The assembly shell 1507 slides relative to the vertical plate 1505 through the displacement block 1506. The assembly shell 1507 slides relative to the lead screw 1510, adjusting the distance between the first clamping plate 1514 and the second clamping plate 1508. The first clamping plate 1514 and the second clamping plate 1508 clamp and fix the sample tube from both sides.

[0025] An air pump 7 is fixedly installed at the top of the height rod 6. Mounting seats 8 are installed on both sides of the air pump 7. A collecting roller 9 is rotatably connected inside the two mounting seats 8. Several steel wire ropes 10 are wound around the surface of the two collecting rollers 9. The bottom ends of the steel wire ropes 10 are fixedly connected to the top of the nitrogen injection pipe 12. A connecting hose 14 is fixedly connected to the surface of the air pump 7. The air pump 7 draws nitrogen through the connecting hose 14. The drawn nitrogen is sprayed out through the nitrogen nozzle 13 on the nitrogen injection pipe 12. The steel wire ropes 10 are wound around the collecting rollers 9, thus completing the height adjustment of the nitrogen injection pipe 12.

[0026] A heating plate 17 is fixedly installed inside the water bath 18. After the heating plate 17 is powered on, the heating wire inside the heating plate 17 is powered on and heats up, heating the water in the water bath 18 and completing the heating of the sample.

[0027] A control panel 2 is fixedly installed on one side of the enrichment housing 1.

[0028] In this embodiment of the application, when in use: the micro motor 1504 is powered on and starts, driving the active bevel gear 1512 to rotate. The active bevel gear 1512 contacts the driven bevel gear 1511, causing the driven bevel gear 1511 to rotate. The driven bevel gear 1511 drives the lead screw 1510 to rotate. The thread on the surface of the lead screw 1510 matches the thread on the inner wall of the assembly shell 1507. The assembly shell 1507 slides relative to the vertical plate 1505 via the displacement block 1506, and slides relative to the lead screw 1510, adjusting the distance between the first clamping plate 1514 and the second clamping plate 1508. The sample tube is clamped and fixed from both sides. After the heating plate 17 is powered on, the heating wire inside the heating plate 17 is powered on and heats up, heating the water in the water bath 18, thus completing the heating of the sample. The air pump 7 draws nitrogen through the connecting hose 14, and the drawn nitrogen is sprayed out through the nitrogen nozzle 13 on the nitrogen blowing pipe 12. The steel wire rope 10 is wound around the collecting roller 9, completing the height adjustment of the nitrogen blowing pipe 12. Nitrogen is blown empty for 5-10 minutes to prevent residual impurities in the nitrogen blowing instrument's gas path. The flow meter is adjusted to the required flow rate of the nitrogen blowing instrument, and nitrogen blowing begins. The flow rate is finely adjusted with the flow valve on the needle, and the gas supply pressure is monitored. It must not exceed 200 kPa. The flow valve is adjusted so that the airflow creates ripples on the sample surface, but splashing should be prevented.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An agricultural product pesticide residue enrichment device comprising an enrichment housing (1), characterized in that: The top end of the enrichment cabinet (1) is provided with a water bath (18), the inner wall of the water bath (18) is fixedly installed with a height rod (6) at the top end, the surface of the height rod (6) is slidably connected with a sliding block (16), one side of the sliding block (16) is fixedly installed with a sample placing cabinet (5), the middle of the height rod (6) is installed with a lifting platform (11), the surface of the lifting platform (11) is fixedly installed with a plurality of nitrogen blowing pipes (12), the bottom end of the plurality of nitrogen blowing pipes (12) is fixedly connected with a nitrogen blowing head (13), the inside of the sample placing cabinet (5) is fixedly installed with a plurality of sample fixing assemblies (15), the four corners of the bottom end of the enrichment cabinet (1) are fixedly installed with supporting legs (3), the four supporting legs (3) are fixedly installed with a lifting assembly (4) between them, and the lifting assembly (4) comprises a positioning plate (41) and two screw rods (42).

2. The agricultural product pesticide residue enrichment device according to claim 1, characterized in that: The top end of the positioning plate (41) is fixedly installed with a motor bracket (45), the top end of the motor bracket (45) is fixedly installed with a stepping motor (44), the output end of the stepping motor (44) is fixedly installed with a rotating shaft (49) penetrating through the motor bracket (45), the middle of the rotating shaft (49) is fixedly installed with a driving pulley (48), the surface of the two screw rods (42) is fixedly installed with a driven pulley (46), and the two driven pulleys (46) and the driving pulley (48) are transmissionally connected with a connecting belt (47).

3. The agricultural product pesticide residue enrichment device according to claim 1, characterized in that: The top end of the two pushing shells (43) is fixedly connected with the two sides of the bottom end of the sample placing cabinet (5) respectively, and the two ends of the two sides of the positioning plate (41) are fixedly connected with the four supporting legs (3) respectively.

4. The agricultural product pesticide residue enrichment device according to claim 1, characterized in that: The fixing assembly (15) comprises a fixing table (1501) and two assembly blocks (1502), two ends of one side of the fixing table (1501) are fixedly connected with one end of the two assembly blocks (1502) respectively, a first clamping plate (1514) is fixedly installed at the middle of one side of the fixing table (1501), a vertical plate (1505) is fixedly installed at one end of one side of each of the two assembly blocks (1502), a displacement block (1506) is slidably connected to the opposite side of each of the two vertical plates (1505), an assembly shell (1507) is fixedly installed at the opposite side of each of the two displacement blocks (1506), an activity groove (1513) is formed at the other end of one side of each of the two assembly blocks (1502), a lead screw (1510) is rotatably connected in the activity groove (1513), the top end of the lead screw (1510) is screwedly connected with a threaded hole (1509) formed in the bottom end of the assembly shell (1507), a second clamping plate (1508) is fixedly installed between the two assembly shells (1507), a driven umbrella bevel gear (1511) is fixedly installed on the surface of the lead screw (1510), a driving umbrella bevel gear (1512) is rotatably connected to one side of the inner wall of the activity groove (1513), a waterproof motor shell (1503) is fixedly installed on the surface of each of the two assembly shells (1507), a micro motor (1504) is fixedly installed in the waterproof motor shell (1503), the output end of the micro motor (1504) is fixedly connected with one end of the driving umbrella bevel gear (1512), the outer side of the driving umbrella bevel gear (1512) is meshedly connected with the outer side of the driven umbrella bevel gear (1511), and the other side of the fixing table (1501) is fixedly connected with a sample placing machine shell (5).

5. The agricultural product pesticide residue enrichment device according to claim 1, characterized in that: The top end of the height rod (6) is fixedly installed with an air pump (7), mounting seats (8) are fixedly installed on the two sides of the air pump (7), collecting rollers (9) are rotatably connected in the mounting seats (8), a plurality of steel wire ropes (10) are wound on the surfaces of the collecting rollers (9), the bottom ends of the steel wire ropes (10) are fixedly connected with the top end of a nitrogen blowing pipe (12), and the surface of the air pump (7) is fixedly connected with a connecting hose (14).

6. The agricultural product pesticide residue enrichment device according to claim 1, characterized in that: The water bath tank (18) is internally fixedly installed with a heating plate (17).

7. The agricultural product pesticide residue enrichment device according to claim 1, characterized in that: The enrichment machine shell (1) is fixedly installed with a control panel (2) on one side.

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