Crop sample detection device

Abstract

The invention relates to a crop sample detection device which comprises a detection box and a discharging channel communicated with the top of the detection box, an inner cavity of the detection box is rotationally connected with a rotating table driven by a motor, and a plurality of placing grooves are formed in the surface of the rotating table; the invention relates to the technical field of crop sample detection. According to the crop sample detection device, through intermittent rotation of the rotating table and cooperation of the pressing block and the contact switch, opening and closing of the switch valve are automatically controlled, circulating and quantitative discharging of the multiple containing grooves is achieved, manual intervention is not needed, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of crop sample testing technology, specifically to a crop sample testing device. Background Technology

[0002] In the fields of agricultural production and environmental monitoring, rapid and batch detection of heavy metal content in crop samples is crucial. Currently, the detection of pulverized crop powder samples generally faces the following technical challenges: First, sample pretreatment and loading rely heavily on manual operation, using tools such as spatulas to scoop powder into the detector dish, which is inefficient, difficult to control the sample volume, and prone to spillage and contamination. Second, during the detection process, the powder sample may be unevenly distributed in the dish, affecting the stability and accuracy of near-infrared light and other detection signals. Third, post-detection sample cleaning is cumbersome, requiring manual emptying and washing, making continuous automated operation difficult and becoming a bottleneck for improving detection efficiency. Therefore, there is an urgent need for an integrated device that can achieve automatic quantitative loading, sample leveling, continuous detection, and automatic cleaning to meet the demands of modern agricultural testing for high throughput, high precision, and automation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a crop sample testing device that solves the problems mentioned above.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a crop sample testing device, comprising a testing box and a feeding channel connected to the top of the testing box, wherein the inner cavity of the testing box is rotatably connected to a rotating table driven by a motor, and the surface of the rotating table is provided with multiple placement slots; The rotation trajectory of the placement trough is located below the feeding channel. A switch valve is installed at the bottom of the feeding channel. A hollow slot is formed within the inner cavity of the rotating platform. An air box is fixedly connected to the surface of the detection box below the hollow slot. An air nozzle is connected to one side of the air box. An air guide slot communicating with the placement trough is formed within the inner cavity of the rotating platform. A detection plate is fixedly connected to the top of the inner cavity of the detection box. The rotation trajectory of the placement trough passes below the frontal projection of the detection plate. During use, the crushed crop sample is added to the feeding channel. The sample accumulates inside the feeding channel. Then, the motor is started, driving the rotating platform to rotate. The rotating platform moves the placement trough to below the feeding channel, at which point the pressing block moves. When the contact switch is activated, it opens the valve at the bottom of the feeding channel, allowing the powder inside to fall into the placement tank. The rotary table then rotates slightly and repeatedly, causing the powder to move and spread evenly within the tank. After one placement tank is filled, it rotates 60° to fill the next. The tank filled with powder then moves to the bottom of the detection plate. At this point, the transmitter of the detection component on the detection plate emits near-infrared light onto the powder. The reflected light is then received by the receiver for internal heavy metal detection. After detection, an external air pump supplies air to the air chamber, which is then blown out through the nozzle, sending the tested powder from the placement tank into the discharge channel for cleaning. Detection continues.

[0005] As a further aspect of the present invention: the right side of the detection box is connected to a discharge channel located below the detection plate.

[0006] As a further aspect of the present invention: the inner cavity of the detection box is fixedly connected to a contact switch electrically connected to the switching valve, and the side of the rotating table is fixedly connected to a pressing block whose rotation trajectory coincides with the contact switch.

[0007] As a further aspect of the present invention: multiple pressing blocks are provided, and each block corresponds to a placement slot.

[0008] As a further aspect of the present invention: an elastic lever is fixedly connected to the top of the rotary table, one end of which abuts against the bottom of the feeding channel. When the rotary table rotates, the elastic lever continuously taps the feeding channel to prevent the accumulation of crop sample powder inside.

[0009] Compared with the prior art, the present invention has the following advantages: The crop sample testing device provided by this invention achieves the following significant benefits through the innovative design of the rotating stage and the collaborative control mechanism: Achieve fully automated continuous detection: By intermittently rotating the rotary table and cooperating with the pressing block and contact switch, the opening and closing of the switching valve is automatically controlled, realizing the cyclical and quantitative feeding of multiple placement slots without manual intervention, which greatly improves the detection efficiency.

[0010] Improve detection accuracy and reliability: The slight vibration generated during the rotation of the rotary table causes the powder sample falling into the placement tank to automatically spread out, forming a uniform detection plane. This effectively avoids near-infrared light scattering or absorption signal distortion caused by uneven sample accumulation, providing stable detection conditions for the detection components and thus improving the accuracy and reliability of heavy metal content detection results.

[0011] Highly efficient self-cleaning and anti-clogging design: After the test is completed, the air blowing system, consisting of an air box, air nozzle and air guide channel, can completely blow the test waste into the discharge channel, realizing automatic and rapid cleaning of the placement tank, preparing for the test of the next sample and ensuring the smoothness of continuous operation.

[0012] The elastic lever on the top of the rotary table continuously taps the feeding channel as it rotates, generating vibration. This effectively prevents hygroscopic or highly viscous powders from accumulating and clogging the inner wall of the channel, ensuring smooth feeding.

[0013] Compact structure and high operational synergy: The entire device integrates feeding, leveling, testing, and cleaning functions within a sealed testing chamber, featuring a compact structure that prevents cross-contamination of samples. The actions of each actuator (switching valve, testing components, air pump) are precisely coordinated with the rotation position of the rotary table, forming an efficient and continuous automated work cycle. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is the main structural view of the present invention.

[0015] In the diagram: 1. Detection box; 2. Rotary table; 3. Hollow groove; 4. Air box; 5. Air nozzle; 6. Air guide groove; 7. Placement groove; 8. Detection plate; 9. Discharge channel; 10. Pressing block; 11. Discharge channel; 12. Switch valve; 13. Elastic lever; 14. Contact switch. Detailed Implementation

[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0017] Please see Figure 1-3 The present invention provides a technical solution: a crop sample testing device, including a testing box 1 and a feeding channel 11 connected to the top of the testing box 1. The inner cavity of the testing box 1 is rotatably connected to a rotating table 2 driven by a motor. The surface of the rotating table 2 is provided with a plurality of placement slots 7. The rotation trajectory of the placement trough 7 is located below the feeding channel 11. A switch valve 12 is installed at the bottom of the feeding channel 11. A hollow groove 3 is opened in the inner cavity of the rotating table 2. An air box 4 is fixedly connected to the surface of the detection box 1 located below the hollow groove 3. An air nozzle 5 is connected to one side of the air box 4. An air guide groove 6 is opened in the inner cavity of the rotating table 2 and communicates with the placement trough 7. A detection plate 8 is fixedly connected to the top of the inner cavity of the detection box 1. The rotation trajectory of the placement trough 7 passes below the front projection surface of the detection plate 8. When in use, the powder of the crop sample after crushing is added into the feeding channel 11. At this time, the sample accumulates inside the feeding channel 11. Then, the motor is started to drive the rotating table 2 to rotate. The rotating table 2 drives the placement trough 7 to move below the feeding channel 11. At this time, the pressing block 10 moves and connects with the receiving block. When the contact switch 14 is engaged, the switch valve 12 at the bottom of the feeding channel 11 is opened, and the powder inside falls into the inner cavity of the placement tank 7. At this time, the rotating table 2 rotates slightly and repeatedly, causing the powder in the placement tank 7 to move and spread evenly in the inner cavity of the placement tank 7. After one placement tank 7 is filled, it rotates 60° to fill the next one. Then the placement tank 7 filled with powder moves to the bottom of the detection plate 8. At this time, the emitter of the detection component in the detection plate 8 emits near-infrared light onto the powder. Then the light reflected by the powder is received by the receiver to detect the internal heavy metals. After the detection is completed, air is supplied to the air box 4 through the external air pump and blown out through the air nozzle 5 to blow the powder that has been tested in the placement tank 7 into the discharge channel 9 for cleaning. Then the detection continues.

[0018] As a further aspect of the present invention: the right side of the detection box 1 is connected to a discharge channel 9 located below the detection plate 8.

[0019] As a further embodiment of the present invention: a contact switch 14 electrically connected to the switching valve 12 is fixedly connected to the inner cavity of the detection box 1, and a pressing block 10 whose rotation trajectory coincides with that of the contact switch 14 is fixedly connected to the side of the rotating table 2.

[0020] As a further aspect of the present invention: multiple pressing blocks 10 are provided, and each is arranged in a one-to-one correspondence with the placement slot 7.

[0021] As a further aspect of the present invention: an elastic lever 13 is fixedly connected to the top of the rotary table 2. One end of the elastic lever 13 abuts against the bottom of the feeding channel 11. When the rotary table 2 rotates, the elastic lever 13 continuously taps the feeding channel 11 to prevent the accumulation of crop sample powder inside.

[0022] When using this invention, the first step is to automate the process of flattening the sample.

[0023] The pulverized crop sample powder is fed into the feeding channel. The motor is started, driving the rotary table to rotate intermittently. When one of the placement slots on the rotary table rotates to be directly below the feeding channel, the pressing block fixed to the side of the rotary table rotates accordingly and abuts against a contact switch fixed inside the detection chamber. The contact switch immediately sends a signal, briefly opening the switch valve at the bottom of the feeding channel, allowing a fixed amount of powder sample to fall into the placement slot. During the subsequent intermittent rotation and slight vibration of the rotary table, the powder in the placement slot is automatically spread out, forming a sample layer of uniform thickness.

[0024] Step 2: Precise detection.

[0025] The placement tray carrying the flattened sample continues to rotate with the rotary table. When it moves directly below the detection plate, the rotary table stops. At this point, the detection components integrated inside the detection plate (such as the emitter and receiver of a near-infrared spectrometer) begin to work. The emitter emits near-infrared light towards the sample, and the light interacts with the sample before being received by the receiver. By analyzing the reflectance spectrum information, the heavy metal content in the sample can be calculated.

[0026] Step 3: Automatic cleaning and circulation.

[0027] The tested placement trough continues to rotate with the rotary table until it is above the air chamber. At this point, an external air pump supplies air to the air chamber, and the high-pressure airflow is precisely blown into the placement trough through the air nozzle, the hollow slot in the rotary table, and the air guide slot connected to it. Under the impact of the airflow, the tested waste material is completely blown up and discharged into the discharge channel, achieving automatic cleaning. After cleaning, the placement trough is left empty and continues to move with the rotary table to the bottom of the discharge channel, starting a new work cycle.

[0028] Meanwhile, the elastic lever fixed to the top of the rotary table continuously moves and taps the bottom of the feeding channel during rotation, and the high-frequency vibration generated effectively prevents the powder from sticking and clogging in the channel.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A crop sample testing device, comprising a testing chamber (1) and a feeding channel (11) connected to the top of the testing chamber (1), characterized in that: The inner cavity of the detection box (1) is rotatably connected to a rotating table (2) driven by a motor, and the surface of the rotating table (2) is provided with multiple placement slots (7). The rotation trajectory of the placement slot (7) is located below the feeding channel (11). A switch valve (12) is provided at the bottom of the feeding channel (11). A hollow slot (3) is opened in the inner cavity of the rotating table (2). An air box (4) is fixedly connected to the surface of the detection box (1) located below the hollow slot (3). An air nozzle (5) is connected to one side of the air box (4). An air guide slot (6) is opened in the inner cavity of the rotating table (2) and communicates with the placement slot (7). A detection plate (8) is fixedly connected to the top of the inner cavity of the detection box (1). The rotation trajectory of the placement slot (7) passes below the front projection surface of the detection plate (8).

2. The crop sample testing device according to claim 1, characterized in that: The right side of the detection box (1) is connected to the discharge channel (9) located below the detection plate (8).

3. The crop sample testing device according to claim 1, characterized in that: The inner cavity of the detection box (1) is fixedly connected to a contact switch (14) that is electrically connected to the switch valve (12), and the side of the rotating table (2) is fixedly connected to a pressing block (10) whose rotation trajectory coincides with that of the contact switch (14).

4. The crop sample testing device according to claim 3, characterized in that: Multiple pressing blocks (10) are provided, and each is provided in a corresponding manner to a placement slot (7).

5. The crop sample testing device according to claim 1, characterized in that: The top of the rotary table (2) is fixedly connected to an elastic lever (13), one end of which abuts against the bottom of the feeding channel (11).

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