A fully automatic pesticide residue detector

Abstract

The present invention discloses a fully automatic pesticide residue detector, which belongs to the technical field of pesticide residue detection, and comprises: a base, a weighing mechanism, a rotating mechanism, a detection mechanism, an extraction mechanism and a feeding mechanism are arranged on the top of the base, a detection disk is connected to the top of the rotating mechanism, a plurality of circular holes are opened on the top of the detection disk, detection cups are arranged in the circular holes, and an oscillation mechanism is arranged on the bottom of the detection disk; the rotating mechanism comprises: a second motor, a first electric push rod, a rotating shaft and a driving gear, and the rotating shaft and the driving gear are both rotatably mounted on the top of the base. The present invention can switch the unidirectional rotation and reciprocating rotation of the detection disk through the rotating mechanism, so as to achieve the effect of material transportation and oscillation, and improve the mixing effect of the sample by cooperating with the oscillation mechanism, and realize the addition of the detection reagent by cooperating with the extraction mechanism and the feeding mechanism, and realize the automatic detection of pesticide residues through the detection mechanism, reduce manual operation, and improve the detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide residue detection, and in particular to a full-automatic pesticide residue detector. Background Art

[0002] Pesticides are an indispensable and important tool in modern agricultural production. They can effectively prevent and control crop diseases and pests and ensure the growth and yield of crops. However, excessive or improper use of pesticides has led to an increasingly serious problem of pesticide residues, posing a potential threat to human health and the ecological environment. According to a report by the World Health Organization (WHO), pesticide residues may cause health problems such as acute poisoning, chronic diseases, and even cancer. In addition, pesticide residues may also pollute the soil, air, and water, affect the ecological balance, and damage biodiversity. Therefore, the detection and monitoring of pesticide residues is particularly important.

[0003] At present, there are many methods for pesticide residue detection, but most of the pesticide residue detection instruments on the market are semi-automatic equipment, the operation process is cumbersome, and it is easily affected by human factors, resulting in unstable test results; therefore, we propose a fully automatic pesticide residue detector to solve this problem. Summary of the invention

[0004] The purpose of the present invention is to provide a fully automatic pesticide residue detector to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fully automatic pesticide residue detector, comprising:

[0007] A base, wherein a weighing mechanism, a rotating mechanism, a detecting mechanism, an extracting mechanism and a feeding mechanism are arranged on the top of the base, a detecting plate is connected to the top of the rotating mechanism, a plurality of circular holes are opened on the top of the detecting plate, detecting cups are arranged in the circular holes, and an oscillating mechanism is arranged on the bottom of the detecting plate;

[0008] The rotating mechanism comprises: a second motor, a first electric push rod, a rotating shaft and a driving gear, wherein the rotating shaft and the driving gear are both rotatably mounted on the top of the base, a driven gear is fixedly mounted on the outer side of the rotating shaft, the driven gear and the driving gear are meshed with each other, a square frame is fixedly mounted on the top of the driving gear, a square plate is slidably mounted in the frame, a rotating arm is fixedly mounted on the output shaft of the second motor, the other end of the rotating arm is rotatably mounted on the top of the square plate, a translation plate is fixedly mounted on one side of the second motor, and the output end of the first electric push rod is fixedly connected to the translation plate;

[0009] The oscillation mechanism comprises: a mounting plate and an impact plate, a connecting arm is fixedly mounted on one side of the impact plate, a connecting shaft is rotatably mounted inside the mounting plate, and the connecting arm is fixedly sleeved on the outer side of the connecting shaft.

[0010] Preferably, the oscillation mechanism further comprises: a ratchet, a limiting plate, a horizontal plate and a vertical plate, the ratchet is fixedly sleeved on the outer side of the connecting shaft, a transmission gear is fixedly installed on the front side of the ratchet, a rack is fixedly installed on the top of the horizontal plate, the rack and the transmission gear are meshed with each other, a trapezoidal protrusion is integrally formed on the top of the horizontal plate, an inclined surface is arranged on one side of the top of the trapezoidal protrusion, an abutment wheel is rotatably installed on the front side of the vertical plate, and the abutment wheel and the inclined surface are located on the same horizontal plane;

[0011] The limiting plate is movably abutted against the outer side of the ratchet wheel, a rotating plate is fixedly installed on one side of the limiting plate, the mounting plate is fixedly installed on the bottom of the detection disk, a fixed shaft and a fixed plate are fixedly installed on the outer side of the mounting plate, the vertical plate is slidably installed in the fixed plate, a vertical spring is fixedly installed on one side of the vertical plate, the top end of the vertical spring is fixedly connected to the fixed plate, and the rotating plate is rotatably sleeved on the outer side of the fixed shaft;

[0012] The outer side of the rotating plate is slidably sleeved with a sliding frame, the top end of the vertical plate is fixedly mounted with a bracket, and the bracket is hinged on the outer side of the sliding frame.

[0013] Preferably, a flat plate is fixedly mounted on the outer side of the mounting plate, a connecting rod is slidably mounted inside the flat plate, a square rod is integrally formed on the outer side of the horizontal plate, the connecting rod is movably abutted against one side of the square rod, a triangular plate is fixedly mounted on the other end of the connecting rod, a transverse spring is fixedly mounted between the triangular plate and the flat plate, a horizontal limiting protrusion is integrally formed on the bottom of the vertical plate, and the horizontal limiting protrusion and the triangular plate are adapted to each other;

[0014] An ear plate and a side plate are fixedly installed on the outer side of the mounting plate, a counterweight plate is fixedly installed on the bottom of the cross plate, the counterweight plate is arranged between the ear plate and the side plate, and a return spring is fixedly installed between the counterweight plate and the side plate, a guide rod is fixedly installed on one side of the side plate, the guide rod is slidably installed in the counterweight plate, a control button is fixedly installed on one side of the ear plate, and the control button abuts against one side of the counterweight plate.

[0015] Preferably, the top end of the rotating shaft is fixedly mounted on the bottom of the detection disk, a vertical plate and a plurality of columns are fixedly mounted on the top of the base, the first electric push rod is fixedly mounted on one side of the vertical plate, an arc frame is fixedly mounted on the top of the column, an annular guide rail is fixedly mounted on the bottom of the detection disk, and the arc frame is slidably sleeved on the outer side of the annular guide rail.

[0016] Preferably, the weighing mechanism comprises: a chassis, a first motor, a pressure sensor and a weighing plate, the chassis is fixedly mounted on the top of the base, the first motor is fixedly mounted on the top of the chassis, a screw is fixedly mounted on the output shaft of the first motor, the outer side of the screw is threadedly connected to a lifting plate, and connecting columns are fixedly mounted on both sides of the top of the lifting plate;

[0017] The top and bottom ends of the pressure sensor are respectively fixedly installed with a top plate and a bottom plate, the weighing plate is fixedly installed on the top of the top plate, the bottom of the top plate is fixedly installed with a guide cylinder, the connecting column is fixedly inserted in the inside of the bottom plate, the top of the connecting column is slidably installed in the corresponding guide cylinder, the top of the chassis is fixedly installed with a vertical rod, and the vertical rod is slidably installed in the lifting plate.

[0018] Preferably, the detection mechanism comprises: a mounting ring, a second electric push rod, a transmitting plate and a light source receiving plate, a U-shaped rod is fixedly mounted on the bottom of the mounting ring, the second electric push rod is fixedly mounted on the top of the base, the output end of the second electric push rod is fixedly connected to the U-shaped rod, a heating column is fixedly mounted in the mounting ring, the transmitting plate is fixedly mounted on one inner wall of the mounting ring, and the light source receiving plate is fixedly mounted on the other inner wall of the mounting ring;

[0019] A guide ring is fixedly installed on the outer side of the mounting ring, a plurality of guide columns are fixedly installed on the top of the base, and the guide ring is slidably sleeved on the outer side of the guide column.

[0020] Preferably, the extraction mechanism includes: a peristaltic pump, a first mounting cylinder and a first rotating arm, the first mounting cylinder is fixedly mounted on the top of the base, a third motor is fixedly mounted in the first mounting cylinder, a first driving shaft is fixedly mounted on the output shaft of the third motor, the top of the first driving shaft is fixedly connected to the first rotating arm, the peristaltic pump is fixedly mounted on one side of the first rotating arm, a feed pipe and a discharge pipe are respectively connected in the feed port and the discharge port of the peristaltic pump, the other end of the discharge pipe is connected to the extraction head, a third electric push rod is fixedly mounted on the top of the first rotating arm, a translation frame is fixedly mounted on the output end of the third electric push rod, the translation frame is slidably sleeved on the outside of the rotating arm, a fourth electric push rod is fixedly mounted on the top of the translation frame, a connecting rod is fixedly mounted on the output end of the fourth electric push rod, one end of the connecting rod is fixedly mounted on the outside of the extraction head, and a straight rod is fixedly mounted on the other end of the connecting rod, and the straight rod is slidably mounted in the translation frame.

[0021] Preferably, the feeding mechanism includes: a plunger pump, a second mounting cylinder and a second rotating arm, the second mounting cylinder is fixedly mounted on the top of the base, a fourth motor is fixedly mounted in the second mounting cylinder, a second drive shaft is fixedly mounted on the output shaft of the fourth motor, the top of the second drive shaft is fixedly connected to the second rotating arm, the plunger pump is fixedly mounted on one side of the second rotating arm, a stabilizing bar is fixedly mounted on the other side of the second rotating arm, a feeding head is fixedly mounted on the other end of the stabilizing bar, the feed port and the discharge port of the plunger pump are respectively connected with an inlet pipe and an outlet pipe, and the other end of the outlet pipe is connected to the top of the feeding head.

[0022] Preferably, a controller is disposed on the top of the base, and the controller is signal-connected with the first motor, the second motor, the third motor, the fourth motor, the first electric push rod, the second electric push rod, the third electric push rod and the fourth electric push rod;

[0023] A heating wire is fixedly installed in the circular hole, and the heating wire abuts against the outer side of the detection cup;

[0024] A guide wheel is hinged at the bottom of the translation frame, and the discharge pipe is arranged around the outer side of the guide wheel.

[0025] The beneficial effects of the present invention are:

[0026] 1. In the present invention, the fully automatic pesticide residue detector is driven to rotate by starting the first motor, and the screw rod cooperates with the thread of the lifting plate and drives the lifting plate to move upward under the guidance of the vertical rod, thereby driving the bottom plate, the pressure sensor, the top plate and the weighing plate to move upward through the connecting column, so that the weighing plate lifts the detection cup, thereby realizing the measurement of the sample mass through the pressure sensor;

[0027] 2. Start the third electric push rod and the fourth electric push rod to drive the extraction head to the specified position, then start the second motor to drive the rotating arm to rotate. At this time, the axis of the output shaft of the second motor coincides with the axis of the driving gear. When the driving motor drives the rotating arm to rotate, the driving gear and the rotating arm can be driven to rotate synchronously through the cooperation of the square plate and the square frame. The driving gear drives the rotating shaft and the detection disk to rotate through the meshing with the driven gear, so as to move the detection cup to the required position, and start the peristaltic pump to add the buffer solution into the detection cup according to the proportion through the peristaltic pump;

[0028] 3. By starting the first electric push rod, the translation plate and the second motor are driven to a horizontal position, so that the axis center of the output shaft of the second motor deviates from the axis center of the driving gear. When the second motor drives the rotating arm to rotate, the square plate drives the driving gear to rotate back and forth through cooperation with the square frame. The driving gear drives the rotating shaft and the detection disk to rotate back and forth and shake through meshing with the driven gear, thereby achieving shaking and mixing of the sample in the detection cup, and drives the mounting plate to perform reciprocating circular motion when the detection disk reciprocates. The counterweight plate moves back and forth horizontally relative to the mounting plate under the action of inertia, and drives the rack to move synchronously. The rack drives the connecting shaft to rotate through meshing with the transmission gear. The connecting shaft drives the ratchet, the connecting arm and the impact plate to rotate, and limits the rotation of the ratchet through the limiting plate, thereby achieving intermittent unidirectional rotation of the ratchet, so that the counterweight plate gradually approaches the side plate and compresses the reset spring. When the inclined surface on the trapezoidal protrusion on the horizontal plate abuts against the abutment wheel, the vertical plate is pushed upward. The vertical plate is pushed and compressed by the abutment of the horizontal limiting protrusion and the triangular plate. After the horizontal limiting protrusion is out of contact with the triangular plate, the triangular plate is reset under the action of the transverse spring and abuts under the horizontal limiting protrusion, thereby limiting the vertical plate from moving downward and resetting. The vertical plate drives the rotating plate to rotate through the bracket and the sliding frame, so that the limiting plate is out of contact with the ratchet wheel, and the fixation of the ratchet wheel is released, so that the horizontal plate is reset and moved in the opposite direction under the elastic force of the reset spring, and drives the connecting shaft to rotate and move and reset, and the impact plate is made to impact the detection cup through the inertia of the counterweight plate, thereby driving the sample inside it to oscillate up and down, thereby improving the mixing effect. After the counterweight plate is reset, the connecting rod is reset through the abutment of the square rod and the connecting rod, and the connecting rod drives the triangular plate to move horizontally, so that the triangular plate is out of contact with the horizontal limiting protrusion, and the vertical plate is reset under the elastic force of the vertical spring, thereby repeating the above process to achieve intermittent impact of the impact plate on the bottom of the detection cup, thereby improving the mixing effect.

[0029] 4. Start the fourth motor to drive the second drive shaft to rotate, drive the second rotating arm to rotate, drive the feeding head to move, and start the plunger pump to introduce the three reagents into the detection cup, then start the heating wire to heat the beaker and the sample inside it, and start the second motor to drive the detection disk to reciprocate, achieve oscillation mixing, constant temperature incubation, and obtain the sample solution;

[0030] 5. The sample can be tested. During the test, the second electric push rod is started to drive the U-shaped rod to move upward, and the mounting ring is driven to move upward, so that the mounting ring is sleeved on the outside of the test cup. The sample is heated by starting the heating column, and the transmitting plate is started to emit light of a specific wavelength to the sample solution. The sample will absorb part of the light, and the remaining light will be received by the light source receiving plate and converted into an electrical signal. The intensity of the electrical signal is proportional to the concentration of the analyte in the solution. According to the Beer-Lambert law, the absorbance is linearly related to the concentration of the solution. Based on this principle, the content of pesticides in the sample can be quantitatively analyzed by measuring the absorbance;

[0031] 6. In the present invention, the fully automatic pesticide residue detector can switch the unidirectional rotation and reciprocating rotation of the detection disk through the set rotating mechanism, so as to achieve the effect of material transportation and shaking, and improve the mixing effect of the sample by cooperating with the shaking mechanism, and realize the addition of the detection reagent by cooperating with the extraction mechanism and the feeding mechanism. The detection mechanism can realize the automatic detection of pesticide residues, reduce manual operation and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the three-dimensional structure of a fully automatic pesticide residue detector proposed by the present invention;

[0033] Figure 2 This is a partial three-dimensional structural schematic diagram of a fully automatic pesticide residue detector proposed by the present invention;

[0034] Figure 3 This is a schematic cross-sectional view of a fully automatic pesticide residue detector proposed by the present invention;

[0035] Figure 4 for Figure 3 A partial enlarged view of part A;

[0036] Figure 5 This is a schematic diagram of the three-dimensional structure of the detection plate, annular guide rail and arc frame proposed by the present invention;

[0037] Figure 6 It is a three-dimensional structural schematic diagram of the weighing mechanism proposed by the present invention;

[0038] Figure 7 It is a three-dimensional structural schematic diagram of the rotating mechanism proposed by the present invention;

[0039] Figure 8 A schematic diagram of the three-dimensional structure of the oscillation mechanism proposed by the present invention;

[0040] Fig. 9 for Figure 8 A partial enlarged view of part B;

[0041] Fig.10 A schematic diagram of the three-dimensional structure of the oscillation mechanism proposed by the present invention from another perspective;

[0042] Fig.11 It is a schematic cross-sectional structural diagram of the detection mechanism proposed by the present invention;

[0043] Fig.12 This is a schematic diagram of the three-dimensional structure of the extraction mechanism proposed by the present invention;

[0044] Fig.13 The present invention provides a three-dimensional structural schematic diagram of the feeding mechanism.

[0045] In the figure: 1, base; 2, detection plate; 201, annular guide rail; 202, arc frame; 203, column; 3, weighing mechanism; 301, chassis; 302, first motor; 303, lifting plate; 304, vertical rod; 305, connecting column; 306, guide cylinder; 307, top plate; 308, weighing plate; 309, pressure sensor; 4, rotating mechanism; 401, rotating shaft; 402, vertical plate; 403, first electric push rod; 404, driven gear; 405, square plate; 406, driving gear; 407, square frame; 40 8. Rotating arm; 409. Second motor; 410. Translation plate; 5. Oscillating mechanism; 500. Mounting plate; 501. Ratchet; 502. Transmission gear; 503. Impact plate; 504. Rack; 505. Ear plate; 506. Control button; 507. Counterweight plate; 508. Return spring; 509. Horizontal plate; 5091. Trapezoidal protrusion; 5092. Square rod; 510. Side plate; 511. Flat plate; 512. Transverse spring; 513. Connecting rod; 514. Triangular plate; 515. Abutting wheel; 516. Vertical spring; 517, vertical plate; 518, fixed plate; 519, bracket; 520, sliding frame; 521, rotating plate; 522, fixed shaft; 523, limiting plate; 524, connecting shaft; 525, connecting arm; 6, detection mechanism; 601, mounting ring; 602, second electric push rod; 603, transmitting plate; 604, light source receiving plate; 605, heating column; 606, guide column; 607, U-shaped rod; 7, extraction mechanism; 701, first mounting cylinder; 702, third motor; 703, first driving shaft; 704, first rotating arm; 7 05. Peristaltic pump; 706. Feed pipe; 707. Discharge pipe; 708. Extraction head; 709. Connecting rod; 710. Guide wheel; 711. Third electric push rod; 712. Fourth electric push rod; 713. Translation frame; 8. Feeding mechanism; 801. Second mounting cylinder; 802. Fourth motor; 803. Second drive shaft; 804. Second rotating arm; 805. Plunger pump; 806. Inlet pipe; 807. Discharge pipe; 808. Feeding head; 809. Stabilizing rod; 9. Detection cup; 901. Heating wire; 10. Controller. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Reference Figure 1 - Fig.13 , a fully automatic pesticide residue detector, comprising:

[0048] A base 1, a weighing mechanism 3, a rotating mechanism 4, a detection mechanism 6, an extraction mechanism 7 and a feeding mechanism 8 are arranged on the top of the base 1, a detection plate 2 is connected to the top of the rotating mechanism 4, a plurality of circular holes are opened on the top of the detection plate 2, detection cups 9 are arranged in the circular holes, and an oscillation mechanism 5 is arranged at the bottom of the detection plate 2;

[0049] The rotating mechanism 4 includes: a second motor 409, a first electric push rod 403, a rotating shaft 401 and a driving gear 406, the rotating shaft 401 and the driving gear 406 are both rotatably mounted on the top of the base 1, a driven gear 404 is fixedly mounted on the outer side of the rotating shaft 401, the driven gear 404 and the driving gear 406 are meshed with each other, a square frame 407 is fixedly mounted on the top of the driving gear 406, a square plate 405 is slidably mounted in the square frame 407, a rotating arm 408 is fixedly mounted on the output shaft of the second motor 409, the other end of the rotating arm 408 is rotatably mounted on the top of the square plate 405, a translation plate 410 is fixedly mounted on one side of the second motor 409, and the output end of the first electric push rod 403 is fixedly connected to the translation plate 410;

[0050] The oscillation mechanism 5 includes: a mounting plate 500 and an impact plate 503 . A connecting arm 525 is fixedly mounted on one side of the impact plate 503 . A connecting shaft 524 is rotatably mounted inside the mounting plate 500 . The connecting arm 525 is fixedly sleeved on the outer side of the connecting shaft 524 .

[0051] In this embodiment, the oscillation mechanism 5 further includes: a ratchet 501, a limiting plate 523, a horizontal plate 509 and a vertical plate 517. The ratchet 501 is fixedly sleeved on the outer side of the connecting shaft 524. A transmission gear 502 is fixedly installed on the front side of the ratchet 501. A rack 504 is fixedly installed on the top of the horizontal plate 509. The rack 504 and the transmission gear 502 are meshed with each other. A trapezoidal protrusion 5091 is integrally formed on the top of the horizontal plate 509. An inclined surface is provided on one side of the top of the trapezoidal protrusion 5091. An abutment wheel 515 is rotatably installed on the front side of the vertical plate 517. The abutment wheel 515 and the inclined surface are located on the same horizontal plane.

[0052] The limiting plate 523 is movably abutted against the outer side of the ratchet 501, a rotating plate 521 is fixedly installed on one side of the limiting plate 523, the mounting plate 500 is fixedly installed on the bottom of the detection disk 2, a fixed shaft 522 and a fixed plate 518 are fixedly installed on the outer side of the mounting plate 500, the vertical plate 517 is slidably installed in the fixed plate 518, a vertical spring 516 is fixedly installed on one side of the vertical plate 517, the top end of the vertical spring 516 is fixedly connected to the fixed plate 518, and the rotating plate 521 is rotatably sleeved on the outer side of the fixed shaft 522;

[0053] The outer side of the rotating plate 521 is slidably sleeved with a sliding frame 520 , and the top of the vertical plate 517 is fixedly mounted with a bracket 519 , which is hinged to the outer side of the sliding frame 520 .

[0054] In this embodiment, a flat plate 511 is fixedly installed on the outer side of the mounting plate 500, a connecting rod 513 is slidably installed inside the flat plate 511, a square rod 5092 is integrally formed on the outer side of the horizontal plate 509, the connecting rod 513 is movably abutted against one side of the square rod 5092, a triangular plate 514 is fixedly installed on the other end of the connecting rod 513, a transverse spring 512 is fixedly installed between the triangular plate 514 and the flat plate 511, a horizontal limiting protrusion is integrally formed on the bottom of the vertical plate 517, and the horizontal limiting protrusion and the triangular plate 514 are adapted to each other;

[0055] An ear plate 505 and a side plate 510 are fixedly installed on the outer side of the mounting plate 500, and a counterweight plate 507 is fixedly installed on the bottom of the cross plate 509, the counterweight plate 507 is arranged between the ear plate 505 and the side plate 510, and a return spring 508 is fixedly installed between the counterweight plate 507 and the side plate 510, a guide rod is fixedly installed on one side of the side plate 510, and the guide rod is slidably installed in the counterweight plate 507, a control button 506 is fixedly installed on one side of the ear plate 505, and the control button 506 abuts against one side of the counterweight plate 507.

[0056] In this embodiment, the top of the rotating shaft 401 is fixedly installed on the bottom of the detection disk 2, the top of the base 1 is fixedly installed with a vertical plate 402 and a plurality of columns 203, the first electric push rod 403 is fixedly installed on one side of the vertical plate 402, the top of the column 203 is fixedly installed with an arc frame 202, the bottom of the detection disk 2 is fixedly installed with an annular guide rail 201, and the arc frame 202 is slidably sleeved on the outer side of the annular guide rail 201.

[0057] In this embodiment, the weighing mechanism 3 includes: a chassis 301, a first motor 302, a pressure sensor 309 and a weighing plate 308. The chassis 301 is fixedly mounted on the top of the base 1, the first motor 302 is fixedly mounted on the top of the chassis 301, a screw is fixedly mounted on the output shaft of the first motor 302, the outer side of the screw is threadedly connected to a lifting plate 303, and connecting columns 305 are fixedly mounted on both sides of the top of the lifting plate 303;

[0058] The top and bottom ends of the pressure sensor 309 are fixedly installed with a top plate 307 and a bottom plate respectively, the weighing plate 308 is fixedly installed on the top of the top plate 307, the bottom of the top plate 307 is fixedly installed with a guide cylinder 306, the connecting column 305 is fixedly inserted into the inside of the bottom plate, the top of the connecting column 305 is slidably installed in the corresponding guide cylinder 306, the top of the chassis 301 is fixedly installed with a vertical rod 304, and the vertical rod 304 is slidably installed in the lifting plate 303.

[0059] In this embodiment, the detection mechanism 6 includes: a mounting ring 601, a second electric push rod 602, a transmitting plate 603 and a light source receiving plate 604, a U-shaped rod 607 is fixedly installed at the bottom of the mounting ring 601, the second electric push rod 602 is fixedly installed on the top of the base 1, the output end of the second electric push rod 602 is fixedly connected to the U-shaped rod 607, a heating column 605 is fixedly installed in the mounting ring 601, the transmitting plate 603 is fixedly installed on one side of the inner wall of the mounting ring 601, and the light source receiving plate 604 is fixedly installed on the other side of the inner wall of the mounting ring 601;

[0060] A guide ring is fixedly installed on the outer side of the mounting ring 601 , and a plurality of guide posts 606 are fixedly installed on the top of the base 1 . The guide ring is slidably sleeved on the outer side of the guide posts 606 .

[0061] In this embodiment, the extraction mechanism 7 includes: a peristaltic pump 705, a first mounting cylinder 701 and a first rotating arm 704. The first mounting cylinder 701 is fixedly mounted on the top of the base 1. A third motor 702 is fixedly mounted in the first mounting cylinder 701. A first driving shaft 703 is fixedly mounted on the output shaft of the third motor 702. The top of the first driving shaft 703 is fixedly connected to the first rotating arm 704. The peristaltic pump 705 is fixedly mounted on one side of the first rotating arm 704. The feed port and the discharge port of the peristaltic pump 705 are respectively connected to a feed pipe 706 and a discharge pipe 707. The discharge pipe 707 is connected to the feed port of the peristaltic pump 705. The other end of 07 is connected to the extraction head 708, the third electric push rod 711 is fixedly installed on the top of the first rotating arm 704, the output end of the third electric push rod 711 is fixedly installed with a translation frame 713, the translation frame 713 is slidably sleeved on the outside of the rotating arm, the top of the translation frame 713 is fixedly installed with a fourth electric push rod 712, the output end of the fourth electric push rod 712 is fixedly installed with a connecting rod 709, one end of the connecting rod 709 is fixedly installed on the outside of the extraction head 708, the other end of the connecting rod 709 is fixedly installed with a straight rod, and the straight rod is slidably installed in the translation frame 713.

[0062] In this embodiment, the feeding mechanism 8 includes: a plunger pump 805, a second mounting cylinder 801 and a second rotating arm 804, the second mounting cylinder 801 is fixedly installed on the top of the base 1, the fourth motor 802 is fixedly installed in the second mounting cylinder 801, the second drive shaft 803 is fixedly installed on the output shaft of the fourth motor 802, the top of the second drive shaft 803 is fixedly connected to the second rotating arm 804, the plunger pump 805 is fixedly installed on one side of the second rotating arm 804, and a stabilizing rod 809 is fixedly installed on the other side of the second rotating arm 804, and a feeding head 808 is fixedly installed on the other end of the stabilizing rod 809, and the feed port and the discharge port of the plunger pump 805 are respectively connected with an inlet pipe 806 and an outlet pipe 807, and the other end of the outlet pipe 807 is connected to the top of the feeding head 808.

[0063] In this embodiment, a controller 10 is disposed on the top of the base 1, and the controller 10 is signal-connected to the first motor 302, the second motor 409, the third motor 702, the fourth motor 802, the first electric push rod 403, the second electric push rod 602, the third electric push rod 711, and the fourth electric push rod 712;

[0064] A heating wire 901 is fixedly installed in the circular hole, and the heating wire 901 abuts against the outer side of the detection cup 9;

[0065] A guide wheel 710 is hinged at the bottom of the translation frame 713 , and the discharge pipe 707 is wound around the outer side of the guide wheel 710 .

[0066] In this embodiment, when using, the sample needs to be pre-treated first, and the steps of the pre-treatment are as follows:

[0067] First, weighing is required, that is, the sample is placed in the detection cup 9, and the first motor 302 is started to drive the screw to rotate. The screw cooperates with the thread of the lifting plate 303 and drives the lifting plate 303 to move upward under the guidance of the vertical rod 304, thereby driving the bottom plate, the pressure sensor 309, the top plate 307 and the weighing plate 308 to move upward through the connecting column 305, so that the weighing plate 308 lifts the detection cup 9, thereby realizing the measurement of the sample mass through the pressure sensor 309;

[0068] Then, buffer solution needs to be added. The extraction head 708 is driven to move to the specified position by starting the third electric push rod 711 and the fourth electric push rod 712. Then, the second motor 409 is started to drive the rotating arm 408 to rotate. At this time, the axis of the output shaft of the second motor 409 coincides with the axis of the driving gear 406. When the driving motor drives the rotating arm to rotate, the driving gear 406 and the rotating arm 408 can be driven to rotate synchronously through the cooperation of the square plate 405 and the square frame 407. The driving gear 406 drives the rotating shaft 401 and the detection disk 2 to rotate by meshing with the driven gear 404, so as to move the detection cup 9 to the required position, and the peristaltic pump 705 is started to add the buffer solution into the detection cup 9 according to the proportion through the peristaltic pump 705.

[0069] If the sample in the test cup 9 is shaken and mixed, the first electric push rod 403 is started to drive the translation plate 410 and the second motor 409 to a horizontal position, so that the axis of the output shaft of the second motor 409 deviates from the axis of the driving gear 406. When the second motor 409 drives the rotating arm 408 to rotate, the square plate 405 drives the driving gear 406 to rotate back and forth through cooperation with the square frame 407. The driving gear 406 drives the rotating shaft 401 and the detection disk 2 to rotate back and forth and shake through meshing with the driven gear 404, thereby achieving shaking and mixing of the sample in the detection cup 9, and driving the mounting plate 500 to perform reciprocating circular motion when the detection disk 2 rotates back and forth. The counterweight plate 507 moves back and forth horizontally relative to the mounting plate 500 under the action of inertia, and drives the rack 504 to move synchronously. The rack 504 drives the connecting shaft 524 to rotate by meshing with the transmission gear 502. The connecting shaft 524 drives the ratchet 501, the connecting arm 525 and the impact plate 503 to rotate, and limits the rotation of the ratchet 501 through the limiting plate 523, so as to realize the intermittent unidirectional rotation of the ratchet 501, so that the counterweight plate 507 gradually approaches the side plate 510 and compresses the reset spring 508. When the inclined surface on the trapezoidal protrusion 5091 on the cross plate 509 abuts against the abutment wheel 515, the counterweight plate 507 gradually moves toward the side plate 510, and compresses the reset spring 508. The vertical plate 517 moves upward, and the vertical plate 517 pushes the triangular plate 514 to move horizontally and compress it through the contact between the horizontal limiting protrusion and the triangular plate 514. After the horizontal limiting protrusion is out of contact with the triangular plate 514, the triangular plate 514 is reset under the action of the transverse spring 512 and abuts under the horizontal limiting protrusion, thereby limiting the vertical plate 517 from moving downward and resetting. The vertical plate 517 drives the rotating plate 521 to rotate through the bracket 519 and the sliding frame 520, so that the limiting plate 523 is out of contact with the ratchet 501, and the fixation of the ratchet 501 is released, so that the horizontal plate 509 is reset and moves in the opposite direction under the elastic force of the reset spring 508. , and drives the connecting shaft 524 to rotate and move to reset, and through the inertia of the counterweight plate 507, the impact plate 503 impacts the detection cup 9, thereby driving the sample inside it to oscillate up and down, improving the mixing effect, after the counterweight plate 507 is reset, the square rod 5092 and the connecting rod 513 are abutted to drive the connecting rod 513 to reset, and the connecting rod 513 drives the triangular plate 514 to move horizontally, so that the triangular plate 514 is out of contact with the horizontal limit protrusion, and the vertical plate 517 is reset under the elastic force of the vertical spring 516, so that the intermittent impact of the impact plate 503 on the bottom of the detection cup 9 can be achieved by repeating the above process, thereby improving the mixing effect;

[0070] Then, reagents are added, and the second drive shaft 803 is driven to rotate by starting the fourth motor 802, and the second rotating arm 804 is driven to rotate, and the feeding head 808 is driven to move, and the three reagents are introduced into the detection cup 9 by starting the plunger pump 805, and then the heating wire 901 is started to heat the beaker and the sample inside it, and the detection disk 2 is driven to reciprocate by starting the second motor 409 to achieve oscillation mixing and constant temperature incubation to obtain a sample solution;

[0071] After the above-mentioned pretreatment, the sample can be tested. During the test, the U-shaped rod 607 is driven upward by starting the second electric push rod 602, and the mounting ring 601 is driven upward so that the mounting ring 601 is sleeved on the outside of the test cup 9. The sample is heated by starting the heating column 605, and the light of a specific wavelength is emitted to the sample solution by starting the emission plate 603. The sample absorbs a part of the light, and the remaining light is received by the light source receiving plate 604 and converted into an electrical signal. The intensity of the electrical signal is proportional to the concentration of the analyte in the solution. According to the Beer-Lambert law, the absorbance is linearly related to the concentration of the solution. According to this principle, by measuring the absorbance, the content of pesticides in the sample can be quantitatively analyzed.

[0072] The above is a detailed introduction to a fully automatic pesticide residue detector provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A fully automatic pesticide residue detector, characterized in that: include: A base (1), wherein a weighing mechanism (3), a rotating mechanism (4), a detection mechanism (6), an extraction mechanism (7) and a feeding mechanism (8) are arranged on the top of the base (1); a detection plate (2) is connected to the top of the rotating mechanism (4); a plurality of circular holes are opened on the top of the detection plate (2); detection cups (9) are arranged in the circular holes; and an oscillation mechanism (5) is arranged on the bottom of the detection plate (2); The rotating mechanism (4) comprises: a second motor (409), a first electric push rod (403), a rotating shaft (401) and a driving gear (406); the rotating shaft (401) and the driving gear (406) are both rotatably mounted on the top of the base (1); a driven gear (404) is fixedly mounted on the outer side of the rotating shaft (401); the driven gear (404) and the driving gear (406) are meshed with each other; a square frame (407) is fixedly mounted on the top of the driving gear (406); a square plate (405) is slidably mounted in the square frame (407); a rotating arm (408) is fixedly mounted on the output shaft of the second motor (409); the other end of the rotating arm (408) is rotatably mounted on the top of the square plate (405); a translation plate (410) is fixedly mounted on one side of the second motor (409); and the output end of the first electric push rod (403) is fixedly connected to the translation plate (410); The oscillating mechanism (5) comprises: a mounting plate (500) and an impact plate (503); a connecting arm (525) is fixedly mounted on one side of the impact plate (503); a connecting shaft (524) is rotatably mounted inside the mounting plate (500); and the connecting arm (525) is fixedly sleeved on the outside of the connecting shaft (524).

2. The fully automatic pesticide residue detector according to claim 1, characterized in that: The oscillation mechanism (5) further comprises: a ratchet (501), a limiting plate (523), a horizontal plate (509) and a vertical plate (517); the ratchet (501) is fixedly sleeved on the outer side of the connecting shaft (524); a transmission gear (502) is fixedly mounted on the front side of the ratchet (501); a rack (504) is fixedly mounted on the top of the horizontal plate (509); the rack (504) and the transmission gear (502) are meshed with each other; a trapezoidal protrusion (5091) is integrally formed on the top of the horizontal plate (509); an inclined surface is arranged on one side of the top of the trapezoidal protrusion (5091); an abutment wheel (515) is rotatably mounted on the front side of the vertical plate (517); the abutment wheel (515) and the inclined surface are located on the same horizontal plane; The limiting plate (523) is movably abutted against the outer side of the ratchet (501); a rotating plate (521) is fixedly installed on one side of the limiting plate (523); the mounting plate (500) is fixedly installed on the bottom of the detection disk (2); a fixed shaft (522) and a fixed plate (518) are fixedly installed on the outer side of the mounting plate (500); the vertical plate (517) is slidably installed in the fixed plate (518); a vertical spring (516) is fixedly installed on one side of the vertical plate (517); the top end of the vertical spring (516) is fixedly connected to the fixed plate (518); and the rotating plate (521) is rotatably sleeved on the outer side of the fixed shaft (522); The outer side of the rotating plate (521) is slidably sleeved with a sliding frame (520), and the top end of the vertical plate (517) is fixedly mounted with a bracket (519), and the bracket (519) is hinged on the outer side of the sliding frame (520).

3. The fully automatic pesticide residue detector according to claim 2, characterized in that: A flat plate (511) is fixedly mounted on the outer side of the mounting plate (500), a connecting rod (513) is slidably mounted inside the flat plate (511), a square rod (5092) is integrally formed on the outer side of the horizontal plate (509), the connecting rod (513) is movably abutted against one side of the square rod (5092), a triangular plate (514) is fixedly mounted on the other end of the connecting rod (513), a transverse spring (512) is fixedly mounted between the triangular plate (514) and the flat plate (511), a horizontal limiting protrusion is integrally formed on the bottom of the vertical plate (517), and the horizontal limiting protrusion and the triangular plate (514) are mutually adapted; An ear plate (505) and a side plate (510) are fixedly mounted on the outer side of the mounting plate (500); a counterweight plate (507) is fixedly mounted on the bottom of the transverse plate (509); the counterweight plate (507) is arranged between the ear plate (505) and the side plate (510); and a return spring (508) is fixedly mounted between the counterweight plate (507) and the side plate (510); a guide rod is fixedly mounted on one side of the side plate (510); the guide rod is slidably mounted in the counterweight plate (507); a control button (506) is fixedly mounted on one side of the ear plate (505); and the control button (506) abuts against one side of the counterweight plate (507).

4. The fully automatic pesticide residue detector according to claim 1, characterized in that: The top end of the rotating shaft (401) is fixedly mounted on the bottom end of the detection disk (2); a vertical plate (402) and a plurality of vertical columns (203) are fixedly mounted on the top end of the base (1); the first electric push rod (403) is fixedly mounted on one side of the vertical plate (402); an arc frame (202) is fixedly mounted on the top end of the vertical column (203); an annular guide rail (201) is fixedly mounted on the bottom end of the detection disk (2); and the arc frame (202) is slidably sleeved on the outer side of the annular guide rail (201).

5. The fully automatic pesticide residue detector according to claim 1, characterized in that: The weighing mechanism (3) comprises: a chassis (301), a first motor (302), a pressure sensor (309) and a weighing plate (308); the chassis (301) is fixedly mounted on the top of the base (1); the first motor (302) is fixedly mounted on the top of the chassis (301); a screw rod is fixedly mounted on the output shaft of the first motor (302); a lifting plate (303) is threadedly connected to the outer side of the screw rod; and connecting columns (305) are fixedly mounted on both sides of the top of the lifting plate (303); The top and bottom ends of the pressure sensor (309) are fixedly mounted with a top plate (307) and a bottom plate, respectively; the weighing plate (308) is fixedly mounted on the top of the top plate (307); the bottom of the top plate (307) is fixedly mounted with a guide cylinder (306); the connecting column (305) is fixedly inserted into the inside of the bottom plate; the top end of the connecting column (305) is slidably mounted in the corresponding guide cylinder (306); the top of the chassis (301) is fixedly mounted with a vertical rod (304); and the vertical rod (304) is slidably mounted in the lifting plate (303).

6. The fully automatic pesticide residue detector according to claim 1, characterized in that: The detection mechanism (6) comprises: a mounting ring (601), a second electric push rod (602), a transmitting plate (603) and a light source receiving plate (604); a U-shaped rod (607) is fixedly mounted on the bottom of the mounting ring (601); the second electric push rod (602) is fixedly mounted on the top of the base (1); the output end of the second electric push rod (602) is fixedly connected to the U-shaped rod (607); a heating column (605) is fixedly mounted inside the mounting ring (601); the transmitting plate (603) is fixedly mounted on an inner wall of one side of the mounting ring (601); and the light source receiving plate (604) is fixedly mounted on an inner wall of the other side of the mounting ring (601); A guide ring is fixedly mounted on the outer side of the mounting ring (601), and a plurality of guide columns (606) are fixedly mounted on the top of the base (1), wherein the guide ring is slidably sleeved on the outer side of the guide columns (606).

7. The fully automatic pesticide residue detector according to claim 1, characterized in that: The extraction mechanism (7) comprises: a peristaltic pump (705), a first mounting cylinder (701) and a first rotating arm (704), wherein the first mounting cylinder (701) is fixedly mounted on the top of the base (1), a third motor (702) is fixedly mounted in the first mounting cylinder (701), a first driving shaft (703) is fixedly mounted on the output shaft of the third motor (702), the top end of the first driving shaft (703) is fixedly connected to the first rotating arm (704), the peristaltic pump (705) is fixedly mounted on one side of the first rotating arm (704), a feed port and a discharge port of the peristaltic pump (705) are respectively connected to a feed pipe (706) and a discharge pipe (707), and the discharge pipe (707) is connected to the discharge pipe (708). 07) is connected to an extraction head (708), a third electric push rod (711) is fixedly installed on the top of the first rotating arm (704), a translation frame (713) is fixedly installed on the output end of the third electric push rod (711), and the translation frame (713) is slidably sleeved on the outer side of the rotating arm, a fourth electric push rod (712) is fixedly installed on the top of the translation frame (713), and a connecting rod (709) is fixedly installed on the output end of the fourth electric push rod (712), one end of the connecting rod (709) is fixedly installed on the outer side of the extraction head (708), and the other end of the connecting rod (709) is fixedly installed with a straight rod, and the straight rod is slidably installed in the translation frame (713).

8. The fully automatic pesticide residue detector according to claim 7, characterized in that: The feeding mechanism (8) comprises: a plunger pump (805), a second mounting cylinder (801) and a second rotating arm (804), wherein the second mounting cylinder (801) is fixedly mounted on the top of the base (1), a fourth motor (802) is fixedly mounted in the second mounting cylinder (801), a second drive shaft (803) is fixedly mounted on the output shaft of the fourth motor (802), the top end of the second drive shaft (803) is fixedly connected to the second rotating arm (804), the plunger pump (805) is fixedly mounted on one side of the second rotating arm (804), and a stabilizing bar (809) is fixedly mounted on the other side of the second rotating arm (804), A feeding head (808) is fixedly installed at the other end of the stabilizing rod (809); an inlet pipe (806) and an outlet pipe (807) are respectively connected to the inlet and outlet of the plunger pump (805); the other end of the outlet pipe (807) is connected to the top of the feeding head (808); a controller (10) is arranged on the top of the base (1); the controller (10) is signal-connected to the first motor (302), the second motor (409), the third motor (702), the fourth motor (802), the first electric push rod (403), the second electric push rod (602), the third electric push rod (711) and the fourth electric push rod (712); A heating wire (901) is fixedly installed in the circular hole, and the heating wire (901) abuts against the outer side of the detection cup (9); A guide wheel (710) is hinged at the bottom of the translation frame (713), and the discharge pipe (707) is arranged around the outside of the guide wheel (710).

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