[0024] The present invention will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, which merely illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.
[0025] Such as figure 1 As shown, a spotting device for aflatoxin detection based on thin layer analysis method includes a base 1, a top plate 2, a controller 3, a flat plate 4, a correction mechanism, a spotting mechanism, a material box 5, and two The side plate 6 and four legs 7, the side plate 6 is fixed above the base 1, the top plate 2 is erected on two side plates 6, the controller 3 is fixed on one of the side plates 6, the The controller 3 is equipped with a PLC, the material box 5 is fixed above the top plate 2, the four corners of the plate 4 are fixed above the base 1 by four feet 7 respectively, and the correction mechanism is located below the plate 4. The spotting mechanism is located below the top plate 2;
[0026] PLC, that is, programmable logic controller, it uses a type of programmable memory for its internal storage program, executes logic operations, sequence control, timing, counting and arithmetic operations and other user-oriented instructions, and through digital or analog Input/output controls various types of machinery or production processes. Its essence is a computer dedicated to industrial control. Its hardware structure is basically the same as that of a microcomputer. It is generally used for data processing and command reception and output. Realize central control.
[0027] In this spotting device, the top plate 2 is supported by two side plates 6. The top plate 2 is used to store the sample solution for detecting the content of aflatoxin through the material box 5. The plate, that is, the glass sheet, is placed on the flat plate 4 fixedly supported by the four legs 7, and then the controller 3 operates the device to operate, and the correcting mechanism corrects the placement position of the glass sheet so that the central axis of the flat plate 4 coincides with the central axis of the glass sheet At this time, the glass sheet is just below the spotting mechanism, and then PLC controls the spotting mechanism to perform spotting operations on the upper surface of the glass sheet.
[0028] Such as Figure 4 As shown, the correction mechanism includes a drive assembly and four correction assemblies. The four correction assemblies are respectively located on four sides of the plate 4, the drive assembly is located directly under the plate 4, and the correction assembly includes a moving rod 8 and a fixed ring. 9 and a correction plate 10, the drive assembly is connected to one end of the moving rod 8, the correction plate 10 is fixed above the other end of the moving rod 8, the fixed ring 9 is fixed below the plate 4, the fixing The ring 9 is sleeved on the moving rod 8;
[0029] When the correction mechanism is running, the PLC controls the drive components under the plate 4 to start, and acts on the four correction components at the same time, driving the moving rods 8 of the four correction components to approach or move away from the drive components at the same time, using the fixing fixed under the plate 4 The ring 9 fixes the moving direction of the moving rod 8, so that the moving rod 8 drives the splint to move in a direction perpendicular to the side. When the four correcting plates 10 are away from the four sides of the plate 4, the glass sheet can be placed On the flat plate 4 or remove the glass sheet from the flat plate 4, when the four correcting plates 10 move closer to the four sides of the flat plate 4, the four correcting plates 10 abut the four sides of the glass sheet at the same time to adjust the glass The position of the sheet is such that the glass sheet is fixed above the flat plate 4, and the glass sheet is located directly above the flat plate 4, which facilitates the spotting operation of the upper spotting mechanism.
[0030] Such as Figure 1-2 As shown, the spotting mechanism includes a first motor 11, a rotating shaft, a frame 12, four sliding blocks 13, four booms 14, four spotting components, and four connecting components. The first motor 11 Fixed below the top plate 2, the first motor 11 is electrically connected to the PLC, and the first motor 11 is drivingly connected to the bottom end of the rotating shaft. The four connecting components are evenly distributed on the circumference of the bottom end of the rotating shaft. Located on the inner side of the back-shaped frame 12, the two ends of the connecting assembly are respectively connected with two sliders 13, the back-shaped frame 12 is parallel to the top plate 2, and the four corners of the back-shaped frame 12 are distributed through four suspension rods 14 Fixed under the top plate 2, four sliders 13 are respectively sleeved on the four sides of the shape frame 12, the spotting components correspond to the sliders 13, and the spotting components are located under the slider 13 , The spotting component is connected to the material box 5.
[0031] In order to improve the spotting efficiency of the glass sheet, the PLC controls the spotting components under the slider 13 on the four sides of the loop frame 12 to spot the four sides of the glass sheet. After a single spotting is completed, the PLC controls The first motor 11 is activated to drive the rotating shaft to rotate. The rotating shaft acts on the slider 13 through the connecting assembly, so that the four sliders 13 move along the four sides of the shape frame 12, change the position of the spotting assembly, and then control The spotting component performs spotting operation. This operation realizes that the device can spot the four sides of the glass sheet at the same time, which improves work efficiency.
[0032] Such as Figure 4 As shown, the drive assembly includes a second motor 15, a turntable 16, and four drive rods 17, the second motor 15 is fixed below the plate 4, the second motor 15 is electrically connected to the PLC, and the second motor 15 is electrically connected to the PLC. The motor 15 is in transmission connection with the turntable 16. The four driving rods 17 are evenly distributed on the outer circumference of the turntable 16 in the circumferential direction. The driving rods 17 correspond to the correcting components one to one. One end of the driving rod 17 is hinged with the turntable 16. The other end of the rod 17 is hinged with the moving rod 8.
[0033] The PLC controls the second motor 15 to start and drives the turntable 16 to rotate to a certain angle. The turntable 16 drives the driving rod 17 to rotate. The driving rod 17 acts on the moving rod 8 and drives the moving rod 8 to translate under the limit of the fixed ring 9.
[0034] Preferably, in order to ensure the stable rotation of the turntable 16, a plurality of sliding blocks 18 are provided on the outer periphery of the turntable 16, and an annular groove 19 is arranged under the plate 4, and the sliding block 18 matches the annular groove 19, The sliding block 18 is in sliding connection with the annular groove 19. Using the annular groove 19 fixed under the plate 4, the rotation track of the sliding block 18 is fixed, so that the turntable 16 can maintain stable rotation.
[0035] Preferably, in order to further ensure the stable rotation of the turntable 16, the annular groove 19 is a dovetail groove. Since the annular groove 19 is a dovetail groove, the sliding block 18 cannot be separated from the annular groove 19, and the sliding block 18 slides stably in the annular groove 19, which further ensures the stable rotation of the turntable 16.
[0036] Such as figure 2 As shown, the connecting assembly includes a connecting rod 20, a connecting tube 21, and two connecting units. One end of the connecting rod 20 is fixedly connected to the rotating shaft, and the other end of the connecting rod 20 is fixedly connected to the center of the connecting tube 21. , The two connecting units are respectively located at both ends of the connecting pipe 21, the connecting unit includes a sliding plate 22 and a sliding rod 23, the outer periphery of the sliding plate 22 and the inner wall of the connecting pipe 21 are hermetically connected, the sliding plate 22 and the sliding rod 23 One end of the sliding rod 23 is fixedly connected, the other end of the sliding rod 23 is hinged with the slider 13, and a through hole is provided at the center of the side of the connecting tube 21 away from the connecting rod 20.
[0037] The rotating shaft rotates, and the connecting rod 20 drives the connecting tube 21 to rotate, changing the direction of the connecting tube 21, so that the slider 13 connected to the connecting unit at both ends of the connecting tube 21 slides along the side of the shape frame 12. The distance between the adjacent sliding blocks 13 changes. At this time, in the connecting unit, the sliding plate 22 can slide on the inner wall of the connecting tube 21, which facilitates the sliding rod 23 to move relative to the connecting tube 21, so that the connecting tube 21 and the two connecting rods The overall length of 20 changes, so that when the two sliders 13 slide on the shape frame 12, the distance between them changes.
[0038] Preferably, in order to fix the moving direction of the sliding rod 23, the connecting unit further includes a limiting ring 24, the limiting ring 24 is fixed on the inner wall of the connecting pipe 21, and the limiting ring 24 is sleeved on the sliding rod 23 on. The stop ring 24 is used to fix the moving direction of the slide rod 23 so that the slide rod 23 can move along the axis of the stop ring 24, and at the same time prevents the sliding plate 22 from detaching from the connecting pipe 21 and restricts the sliding position of the connecting rod 20.
[0039] Preferably, in order to prevent dust from entering the connecting pipe 21, a filter screen 25 is provided in the connecting pipe 21, and the filter screen 25 is arranged at the through hole. The filter screen 25 is used to filter the air entering the connecting pipe 21 to prevent dust from entering the connecting pipe 21 and affecting the sliding of the sliding plate 22.
[0040] Such as image 3 As shown, the spotting assembly includes a dropper 26, a spotting tube 27, a connecting pipe 28, a sealing plate 29, a lifting unit, and two vertical rods 30. The two vertical rods 30 are respectively located on both sides of the spotting tube 27, The spotting tube 27 is fixed under the sliding block 13 by a vertical rod 30, the lifting unit is located under the sliding block 13, and the lifting unit is in transmission connection with the sealing plate 29. The outer circumference of the sealing plate 29 is connected to the spotting The inner wall of the tube 27 is connected in a sealed manner, the drop tube 26 is fixed at the bottom end of the spotting tube 27, the drop tube 26 is provided with a valve, the valve is electrically connected to the PLC, and the bottom end of the drop tube 26 is connected through The pipe 28 communicates with the bottom of the tank 5.
[0041] In the spotting assembly, the spotting tube 27 is fixed under the slider 13 through two vertical rods 30, so that the spotting tube 27 can move with the movement of the slider 13, and the connecting tube 28 is used to facilitate the sample in the material box 5. When the liquid enters the material pipe, the lifting unit can control the sealing plate 29 to move up and down in the sample tube 27. The PLC controls the lifting component to start, the valve closes, and the lifting component drives the sealing plate 29 to move upward, which can pump the sample liquid in the material box 5 Enter the spotting tube 27, and then the PLC control valve opens, and the lifting unit drives the sealing plate 29 to move down, and the sample liquid in the spotting tube 27 can be dropped on the glass sheet through the dropper 26 to realize the spotting operation.
[0042] Preferably, in order to control the lifting movement of the sealing plate 29, the lifting unit includes a third motor 31, a screw 32 and a sleeve 33, the third motor 31 is fixed below the slider 13, and the third motor 31 The third motor 31 is electrically connected to the PLC. The third motor 31 is drivingly connected to the top end of the screw rod 32. The bottom end of the screw rod 32 is arranged in the sleeve 33 which is fixed under the sealing plate 29. The connection between the sleeve 33 and the screw rod 32 is provided with a thread matching the screw rod 32. The PLC controls the third motor 31 to start and drives the screw 32 to rotate. The screw 32 acts on the sleeve 33 through threads, so that the sleeve 33 moves along the axis of the screw 32, and then drives the sealing plate 29 to move up and down.
[0043] Preferably, using the strong driving force of the DC servo motor, in order to ensure the driving force of the first motor 11, the first motor 11 is a DC servo motor.
[0044] When the user uses the spotting device, the glass sheet is placed on the plate 4, and then the device is operated by the controller 3, and the driving component acts on the surrounding correction components, and the correction plate 10 is driven by the moving rod 8 to the plate 4 at the same time. The four sides move closer to make the glass sheet fixed directly above the plate 4, which is convenient for the spotting mechanism to accurately spot the glass sheet. The spotting component is used to extract the sample liquid in the material box 5 for single spotting. The motor 11 drives the shaft to rotate, and the connecting components drive the four sliders 13 to move along the four side plates 6 of the shape frame 12, and then the spotting component performs spotting operations again, thus realizing automatic and efficient spotting. Improve the practicability of the equipment.
[0045] Compared with the prior art, the spotting device for aflatoxin detection based on the thin layer analysis method fixes the glass sheet directly above the flat plate 4 through a correction mechanism, which is convenient for the spotting mechanism to accurately spot the upper surface of the glass sheet. In this way, not only that, the spotting mechanism is used to automatically spot the four sides above the glass sheet at the same time, which improves the spotting efficiency and the practicability of the equipment.
[0046] Taking the above-mentioned ideal embodiment according to the present invention as enlightenment, through the above-mentioned description content, relevant staff can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the content of the description, and its technical scope must be determined according to the scope of the claims.
