An all-in-one machine for grain storage sampling and quality inspection

Abstract

The invention relates to the field of grain sampling, and specifically to an integrated machine for grain sampling and quality inspection upon storage. The machine comprises a frame, a base, a sampling tube, a sampling rod, a sliding assembly, and a rotating assembly. The sampling tube is slidably and rotatably connected to the base via a through hole, the sampling rod is located inside the sampling tube, and the sampling rod is rotatably connected to the sampling tube. The sliding assembly is used to manipulate the sliding of the sampling tube and the sampling rod, and the rotating assembly is used to manipulate the rotation of the sampling rod and the sampling tube. The outer wall of the sampling tube is provided with counterclockwise threaded digging teeth, and the sampling rod is provided with clockwise threaded grain guiding teeth. The invention uses the digging teeth on the sampling tube to assist in penetrating into a grain pile, and then the sampling rod rotates to drive the grain guiding teeth to perform sampling, thereby achieving the purpose of avoiding situations such as grain blocking an air intake pipe and large grain chunks being difficult to absorb.

Description

Technical Field

[0001] The invention relates to the field of grain sampling, in particular to an all-in-one machine for grain storage sampling and quality inspection. Background Art

[0002] During the quality inspection of grain upon storage, a portion of the grain is often selected for quality inspection, and the process of taking samples from the grain pile is called sampling. Sampling is a very important part of the quality inspection process of grain upon storage. However, there are still some deficiencies in the actual sampling process, such as insufficient degrees of freedom, poor stability and accuracy of the sampling tube, and impurities in the sampled grain.

[0003] Hubei Yewei Grain and Oil Machinery Co., Ltd. has invented a grain sampling machine, whose patent number is CN105738149A, which includes: a first column, which is fixed on the ground; a second column, which is rotatably connected to the first column; a third column, which is slidably connected to the second column; a cantilever, which is horizontally fixedly installed on the top of the third column, and a first guide rail is provided on the cantilever; a sampling cart, which is slidably connected to the first guide rail, and a second guide rail is fixedly installed on the sampling cart; a sampling rod, which is installed on the second guide rail to be slidably connected to the sampling cart, a grain extraction channel is coaxially connected to the sampling rod, and a side hole communicating with the grain extraction channel is provided on the side of the sampling rod. The upper end of the grain extraction channel is communicated with the grain conveying pipe, and a negative pressure fan connected to the grain conveying pipe is installed on the ground.

[0004] Although the above device can solve the problems of insufficient degrees of freedom, poor stability and accuracy of the sampling tube, and impurities in the sampled grain to a certain extent, it still has the following shortcomings:

[0005] The sampling rod is prone to tilting when inserted, thus affecting the accuracy of the sample. In addition, when the space reserved between the grain surface and the silo top is small, it is impossible to sample the grain silo with deeper storage.

[0006] In response to the above problems, Anhui Agricultural University designed a grain sampling device for a grain warehouse, with patent number CN108871861A and patent number , which includes a base box, four sets of first electric telescopic rods are installed on the bottom surface of the base box, the other end of the first electric telescopic rod is hinged to a horizontal pad, a controller, a level sensor and a battery pack are arranged in the base box, a baffle is provided on the upper surface of the base box, the sampling rod is located on the upper surface of the base box, a column is connected to the front end of the base box, a rod insertion device is connected to the column, a rod taking device is installed on the base box on one side of the column, and the upper end of the rod insertion device is connected to the grain suction device through a hose.

[0007] Although the above device can solve the problems of sampling from deep grain silos due to the tilt of the sampling rod and the small space between the grain surface and the silo top, it still has the following shortcomings:

[0008] When sampling deeper grain piles, the suction fan cannot generate enough suction force because there is very little air deep in the grain pile, making it difficult to collect the grain. Moreover, the sampling tube that uses suction will absorb more lighter and smaller grains and impurities when absorbing samples, making the sampling sample less comprehensive, thereby increasing the detection error.

[0009] In response to the above problems, Henan University of Technology invented a sampling tube for deep reverse sampling of bulk grain, with patent number CN109342114A, which includes a sampling head tube and several sampling rear tubes. The lower ends of the sampling head tube and the sampling rear tube are provided with an internal thread section, and the top of the sampling rear tube is provided with an external thread section that can cooperate with the internal thread section. A connecting rod is coaxially installed in the sampling head tube, and an auxiliary rod is coaxially installed in the sampling rear tube. The top of the connecting rod is provided with a spiral blade, which fits tightly with the sampling head tube. Tail blocks are provided at the bottom of the connecting rod and the auxiliary rod; a slot is provided at the top of the auxiliary rod corresponding to the tail block.

[0010] The above solution uses the grain's own gravity to sample by inserting it into the grain pile in reverse, and controls the grain outflow speed by spiral blades. Although this method can solve the problem of suction sampling, it still has the following problems:

[0011] The device needs to be inserted upside down into the grain pile, making it impossible to sample grain on a truck. Furthermore, the sampling warehouse must be specially designed to accommodate this sampling method. Consequently, the device has limited universality and is unsuitable for common sampling situations. Furthermore, due to its upside-down insertion method, a malfunction can easily lead to serious accidents.

[0012] In view of this, in order to overcome the above technical problems, the present invention designs an all-in-one machine for grain storage sampling and quality inspection to solve the above technical problems. Summary of the Invention

[0013] The technical problems to be solved by the present invention are: the traditional suction sampling device will absorb more lighter and finer grains and impurities when sucking samples, making the sampled samples less comprehensive; and the inverted sampling device has poor universality.

[0014] In order to achieve the above object, the present invention provides the following technical solutions:

[0015] The present invention provides a grain storage sampling and quality inspection integrated machine, comprising a frame, a base, a sampling tube, a sampling rod, a sliding assembly, and a rotating assembly;

[0016] The base is slidably connected to the frame, and the frame can be fixed to the ground to increase the stability of the entire device. The base is provided with a power device for driving the base to slide on the frame, and the power device is electrically connected to the control system. Other components are installed on the base; a through hole is opened on the base, and the sampling tube is slidably and rotatably connected to the base through the through hole. The sampling rod is located inside the sampling tube, and the sampling rod is rotatably connected to the sampling tube. The sampling rod and the sampling tube together constitute a pipeline used for sampling. The sampling rod and the sampling tube simultaneously penetrate into the grain pile and cooperate with each other to complete the sampling;

[0017] The sliding assembly is fixedly mounted on the frame, and the sliding assembly is used to manipulate the sampling tube and the sampling rod to slide up and down. The sliding assembly can control the linear movement of the sampling tube and the sampling rod in the up and down directions, so that the sampling tube and the sampling rod go deep into the grain pile, and the sliding assembly is electrically connected to the control system; the rotating assembly is slidably connected to the base through the sliding assembly. Since the rotating assembly is slidably connected to the base, the rotating assembly can only slide up and down but cannot rotate itself. The rotating assembly is fixedly connected to the sampling rod, and the rotating assembly can drive the sampling rod to rotate relative to the base. The rotating assembly is used to manipulate the sampling rod and the sampling tube to rotate, and the rotating assembly is electrically connected to the control system;

[0018] The outer wall of the sampling tube is provided with counterclockwise threaded digging teeth, and the digging teeth can help the sampling tube to better extend into the grain pile. The sampling rod is provided with clockwise threaded grain guiding teeth, and the grain guiding teeth can achieve the purpose of transporting the grain upward by rotating the sampling rod, thereby completing a sampling task; compared with the traditional method of using a blower to suck in the grain, the grain is driven by the rotation of the threaded grain guiding teeth more stably and reliably, and there will be no situation where the grain blocks the air intake pipe and large pieces of grain are difficult to be sucked in.

[0019] When in operation: when the vehicle transporting grain arrives at the designated location, the control system controls the power device on the base to drive the base to slide on the frame to reach the appropriate position, and then the control system controls the sliding assembly to make the sampling tube and the sampling rod penetrate into the grain pile, and then the control system controls the rotating assembly to drive the sampling rod to rotate, and the grain is driven by the grain guiding teeth to move upward along the inner wall of the sampling tube, thereby completing the purpose of sampling.

[0020] When a sufficient amount of grain is collected, the control system controls the sliding assembly to reverse the sampling rod, thereby clearing out the remaining grain in the sampling tube. When the grain in the sampling tube is completely cleared, the control system controls the sliding assembly to make the sampling tube and the sampling rod continue to penetrate deeper into the grain pile, and then take a second sample, and so on, to achieve multi-level sampling at the same point. This design ensures that the amount of grain sampled each time is quantitative and will not be mixed when multiple samplings are performed, thereby ensuring the accuracy of subsequent detection.

[0021] After sampling at one point is completed, the control system controls the sliding assembly to pull out the sampling tube, and then the control system controls the power device on the base to drive the base to slide on the rack to the next sampling point, and then starts sampling at the next point.

[0022] For the selection of sampling points and sampling depths, a 2×5 layout is adopted; specifically, two rows of sampling points are set up at intervals of 1.8 meters on the left and right sides of the truck, with 5 sampling points in each row, and each point is 1.8 meters apart, thus ensuring the universality of sampling quality inspection. In addition, each point is sampled once at a depth of 1 meter, 2 meters, and 3 meters respectively. The sampling tube penetrates the grain pile at a speed of about 0.1 meters per second, and 2 kg is sampled each time. According to experimental data, the sampling rod can roll up about 80g of grain per second when rotating forward; and when the sampling rod stops rotating, there is a maximum of 600g of grain in the sampling tube. According to experimental data, the sampling rod can discharge about 20g of grain per second when reversing.

[0023] The time of each penetration of the sampling tube:

[0024]

[0025] Time for each forward rotation of the sampling rod:

[0026]

[0027] Time for each reversal of the sampling rod:

[0028]

[0029] Calculation shows that the sampling tube takes 10 seconds to penetrate each time. After reaching the predetermined position, the sampling rod rotates forward for 25 seconds and then reverses for 30 seconds, thereby completing the sampling work of one sample layer. The sampling tube then continues to penetrate into the next sample layer for sampling. After completing the sampling task of three sample layers at a point, the sampling tube is pulled out of the grain pile and then moved to the next point for sampling.

[0030] Preferably, the sliding assembly includes: a sliding motor, a power shaft, a No. 1 power gear and a rotating rack. The base is provided with a rotating frame. The sliding motor is fixedly mounted on the base. The sliding motor is electrically connected to the control system. One end of the power shaft is fixedly connected to the sliding motor rotor. The sliding motor can drive the power shaft to rotate. The other end of the power shaft is fixedly mounted with the No. 1 power gear coaxially. The power shaft drives the No. 1 power gear to rotate. The middle part of the power shaft is rotatably connected to the rotating frame.

[0031] The rotating rack is rotatably connected to the sampling tube, and the sampling tube can rotate relative to the rotating rack. The rotating rack through hole is slidably connected to the base, and the rotating rack can slide up and down relative to the base. At the same time, the rotating rack will also drive the sampling tube to move up and down synchronously without affecting its own rotation; the rotating rack is engaged with the No. 1 power gear, and the No. 1 power gear is used to drive the rotating rack to move up and down. Compared with using the transmission roller and the tube wall to achieve the up and down movement of the sampling tube, the method of driving the rotating rack through the No. 1 gear and then driving the sampling tube is more stable, and the pressure is greater and the error is smaller.

[0032] When in operation, the control system controls the sliding motor to drive the power shaft to rotate, and the power shaft transmits power to the rotating rack through the No. 1 power gear. The rotating rack drives the sampling tube to slide up and down, so that the sampling tube goes deep into the interior of the grain pile.

[0033] Preferably, the sliding assembly further comprises: a No. 2 power gear, a transmission shaft, a No. 1 transmission gear, and a No. 2 transmission gear; the transmission shaft is rotatably mounted on another rotating frame; the No. 1 transmission gear and the No. 2 transmission gear are coaxially fixedly mounted on the rotating shaft; the No. 2 power gear is coaxially fixedly mounted on the power shaft; the transmission shaft, the No. 1 transmission gear, and the No. 2 transmission gear can rotate synchronously; the No. 1 transmission gear is meshed with the rotating rack, and the No. 2 transmission gear is meshed with the No. 2 power gear;

[0034] The No. 2 power gear can transmit power to the No. 2 transmission gear, and then the No. 2 rotating gear drives the transmission shaft and the No. 1 transmission gear to rotate, and the No. 1 transmission gear can drive the rotating rack to move up and down, thereby driving the sampling tube to move up and down; the No. 2 power gear and the No. 2 transmission gear clamp the rotating rack for transmission. Compared with the unilateral meshing transmission, this transmission method is more stable and the force is more uniform, avoiding the sampling tube pressing against the through hole on the base to cause excessive friction, resulting in increased resistance when the sampling tube moves.

[0035] When in operation, the power shaft will drive the No. 2 transmission gear to rotate through the No. 2 power gear. The rotation of the No. 2 transmission gear will drive the No. 1 transmission gear to rotate through the transmission shaft. The No. 1 transmission gear will cooperate with the No. 1 power gear to drive the rotating rack to move up and down, thereby better driving the sampling tube to slide up and down, so that the sampling tube can penetrate deep into the grain pile.

[0036] Preferably, a grain guide plate is fixedly provided on the top of the sampling rod, and an annular outlet is opened on the wall of the sampling tube opposite to the grain guide plate, and the grain flows along the annular outlet, and the annular outlet can ensure that the grain can stably flow out of the outlet no matter how the sampling tube rotates; a receiving box is rotatably installed on the outer side of the outlet, and the receiving box is fixedly connected to the sliding rack. The receiving box is used to collect the grain transmitted by the sampling tube and will not rotate, so that the function of transfer during the grain sampling and transmission process can be realized.

[0037] Preferably, the rotating assembly includes a mounting seat, a rotating motor, a rotating shaft, an internal gear, an external gear and an electric push rod. The mounting seat is fixedly connected to the receiving box, thereby ensuring that the mounting seat does not rotate. The rotating motor is fixedly installed on the mounting seat, and the rotating motor is electrically connected to the control system. The rotor of the rotating motor is fixedly connected to the rotating shaft. The control system can control the rotating motor to drive the rotating shaft to rotate. The rotating shaft is fixedly connected to the grain guide plate coaxially, so that the rotation of the rotating shaft can drive the sampling tube to rotate through the grain guide plate.

[0038] The outer gear is slidably connected to the rotating shaft, the electric push rod is fixedly mounted on the grain guide plate, the electric push rod is electrically connected to the control system, the upper end of the electric push rod is fixedly connected to the outer gear, the electric push rod is used to push the outer gear to slide on the rotating shaft, the inner gear is fixedly mounted on the top of the inner wall of the sampling tube, and the outer gear is pushed by the electric push rod to align the outer gear with the inner gear. Thus, the rotating shaft can drive the sampling tube to rotate through the cooperation of the inner gear and the outer gear. Through the design of the internal gear, the outer gear and the electric push rod, the purpose of rotating the motor to drive the sampling tube can be achieved, and this transmission can be freely turned on and off.

[0039] During operation, when the control system controls the sliding assembly to make the sampling tube and the sampling rod penetrate into the grain pile, the control system controls the electric push rod to retract, thereby driving the outer gear to slide on the rotating shaft until the outer gear and the inner gear fit together, and then the control system controls the rotating motor to reverse, and the digging teeth rotate forward to assist in digging. At the same time, the sampling rod reverses, and the grain guiding teeth will not roll up the grain at this time; this design can make the sampling tube penetrate into the grain pile more smoothly, and the upper layer of grain will not enter the sampling tube, which can ensure the accuracy of the sampling sample and avoid deviations in analysis after quality inspection due to mixing of upper and lower layers of grain.

[0040] When it reaches the specified position, the control system controls the electric push rod to extend, thereby driving the outer gear to slide on the rotating shaft until the outer gear and the inner gear are separated. Then the control system controls the rotating motor to rotate forward. At this time, the sampling tube does not rotate, the sampling rod rotates forward, and the grain guiding teeth guide the grain to be transported upward in the sampling tube, thereby completing a sampling task; when a sufficient amount of grain is sampled, the control system controls the rotating motor to reverse. At this time, the sampling tube does not rotate, the sampling rod reverses, and the grain guiding teeth guide the grain to be discharged downward from the sampling tube, thereby avoiding mixing of grain sampled multiple times. After the grain in the sampling tube is completely discharged from the sampling tube, a sampling task is completed.

[0041] After completing a sampling task, the control system controls the electric push rod to retract, thereby driving the outer gear to slide on the rotating shaft until the outer gear and the inner gear fit together, and then the sampling tube is made to penetrate deeper into the grain pile through the cooperation of the rotating component and the sliding component, followed by a second sampling, and so on to achieve multi-level sampling at the same point.

[0042] After sampling at a point is completed, the control system controls the sliding assembly to pull out the sampling tube. At the same time, the control system controls the electric push rod to retract, thereby driving the outer gear to slide on the rotating shaft until the outer gear and the inner gear fit together. Then the control system controls the rotating motor to rotate forward. At this time, the sampling tube reverses and the sampling rod rotates forward. The forward rotation of the sampling tube will assist the excavation teeth in moving upward. Although the sampling rod is rotating forward, it will not roll the grain into the sampling tube because it is moving upward. This design can make the sampling tube leave the grain pile more smoothly, and the grain will not enter the sampling tube.

[0043] When the sampling tube leaves a sampling point, all sampling tasks at one point are completed. Then the control system controls the power device on the base to drive the base to slide on the rack to the next sampling point, and then starts the sampling work at the next point.

[0044] Preferably, one end of the hollow tube is fixedly connected to the receiving box, the hollow tube is communicated with the interior of the receiving box, and the other end of the hollow tube passes through the sand and gravel screening device, the thermometer, the spectral quality inspection machine and the storage bin in sequence; a dust discharge fan is fixedly installed on the side wall of the hollow tube, the dust discharge fan is electrically connected to the control system, the dust discharge fan is communicated with the interior of the hollow tube, and a sensor is provided on the dust discharge fan, which is used to sense whether there are large particles touching it.

[0045] When in operation, the dust discharge fan will generate suction on the inside of the hollow tube, and the suction will suck the dust out of the tube. If any grain is sucked into the dust discharge fan, it will be detected by the sensor. After the sensor transmits the signal to the control system, the control system will control the dust discharge fan to reduce the power, and the attracted grain will fall immediately. This design can achieve the purpose of removing dust while ensuring that the grain will not be discharged by the dust discharge fan.

[0046] When the grain passes through the hollow tube, it undergoes sand and gravel screening, temperature measurement, quality inspection and other tasks in sequence. Finally, the grain that has completed the entire process will be transported to the storage warehouse to avoid food waste.

[0047] Preferably, the lower end of the digging teeth is crescent-shaped and has a sharp lower end surface. The advantage of this design is that the bag of bagged grain can be directly opened by the digging teeth, which saves the device for opening the bag, simplifies the mechanism, thereby reducing the probability of mechanical failure, improving reliability and reducing costs.

[0048] Preferably, the lower end of the sampling rod extends out of the wall of the sampling tube, and the lower end of the grain guiding tooth is in the shape of an inverted pagoda. Such a design allows the grain guiding tooth to extend further into the grain pile, thereby better transporting the grain.

[0049] Preferably, the outer edges of the grain guiding teeth and the digging teeth are fixedly mounted with rubber pads. The purpose of arranging the rubber pads is to prevent the grain guiding teeth and the digging teeth from breaking the grain and causing waste of grain during rotation.

[0050] Preferably, the workflow is:

[0051] S1: Positioning: Locating the truck transporting grain to ensure accurate progress to the next step;

[0052] S2: Sampling, sampling is carried out by using a sampling device deep into the grain pile;

[0053] S3: Multi-point acquisition, repeating steps S1 to S2 for multiple different points;

[0054] S4: Screening: dust and other impurities are initially screened out by the sampling device, and then the sand and stone screening device is used to further screen out sand and stone impurities;

[0055] S5: temperature measurement, measuring the temperature of the grain sample obtained by sampling in a thermometer;

[0056] S6: Spectral quality inspection: The grain that has been temperature-measured is subjected to spectral quality inspection in the spectral quality inspection machine, and the spectral quality inspection data is then transmitted to the 4G-iRTU device;

[0057] S7: Storage: Storing multiple groups of samples that have been sampled and inspected to avoid food waste;

[0058] S8: Analyze and process the results of the spectrum quality inspection;

[0059] S9: Transmit the processed and analyzed data to the PLC and cloud server;

[0060] S10: The PLC transmits the analyzed data to the display for display.

[0061] The beneficial effects of the present invention are as follows:

[0062] 1. The present invention relates to an integrated machine for grain storage sampling and quality inspection. The control system controls the power device on the base to drive the base to slide on the frame to reach a suitable position. The control system then controls the sliding assembly to allow the sampling tube and the sampling rod to penetrate into the grain pile. The control system then controls the rotating assembly to drive the sampling rod to rotate. The grain is driven by the grain guide teeth to move upward along the inner wall of the sampling tube, thereby completing the purpose of sampling. Compared with the traditional method of transporting grain by suction with a blower, the method of driving grain by rotating the threaded grain guide teeth is more stable and reliable, and there will be no problems such as grain blocking the air intake pipe and large pieces of grain being difficult to be sucked in.

[0063] 2. The present invention provides an integrated machine for grain storage sampling and quality inspection. After a sufficient amount of grain is collected, the control system controls the sliding assembly to reverse the sampling rod, thereby cleaning out the remaining grain in the sampling tube. After the grain in the sampling tube is completely cleaned, the control system controls the sliding assembly to make the sampling tube and the sampling rod continue to penetrate deeper into the grain pile, and then perform a second sampling, and so on to achieve multi-level sampling at the same point. Such a design can ensure that the amount of grain sampled each time is quantitative and will not be mixed when multiple samplings are performed, thereby ensuring the accuracy of subsequent detection.

[0064] 3. In the integrated grain storage sampling and quality inspection machine of the present invention, the lower ends of the digging teeth are crescent-shaped and have sharp lower end faces. This design has the advantage that bagged grain can be directly cut open by the digging teeth, eliminating the need for bag-cutting equipment and simplifying the mechanism, thereby reducing the probability of mechanical failure, improving reliability, and reducing costs.

[0065] 4. The present invention provides an all-in-one machine for grain storage sampling and quality inspection. The dust removal fan will generate suction on the inside of the hollow tube, and the suction will suck the dust out of the tube. If any grain is sucked into the dust removal fan, it will be detected by the sensor. After the sensor transmits the signal to the control system, the control system will control the dust removal fan to reduce the power, and the attracted grain will fall immediately. This design can achieve the purpose of removing dust while ensuring that the grain will not be discharged by the dust removal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0067] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0068] Figure 2 This is a schematic diagram of the sampling device of the present invention Figure 1 ;

[0069] Figure 3 This is a schematic diagram of the sampling device of the present invention Figure 2 ;

[0070] Figure 4 Schematic diagram of the structure of the sampling tube of the present invention;

[0071] Figure 5 2 is a schematic structural diagram of the sampling rod of the present invention;

[0072] Figure 6 It is a schematic structural diagram of the rotating assembly of the present invention;

[0073] Figure 7 It is a schematic diagram of the hollow tube structure of the present invention;

[0074] Figure 8 It is a schematic structural diagram of the sliding assembly of the present invention;

[0075] Figure 9 It is a schematic diagram of the rotating rack structure of the present invention;

[0076] Figure 10 It is a schematic diagram of the workflow of the present invention.

[0077] In the figure: frame 1, base 2, rotating frame 21, sampling tube 3, digging teeth 31, sampling rod 4, grain guiding teeth 41, grain guiding plate 42, sliding assembly 5, power shaft 51, No. 1 power gear 52, rotating rack 53, No. 2 power gear 54, transmission shaft 55, No. 1 transmission gear 56, No. 2 transmission gear 57, rotating assembly 6, mounting base 61, rotating shaft 62, internal gear 63, external gear 64, electric push rod 65, receiving box 7, hollow tube 8, ash discharge fan 81. DETAILED DESCRIPTION

[0078] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0079] Example 1, as Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, it includes a frame 1, a base 2, a sampling tube 3, a sampling rod 4, a sliding component 5 and a rotating component 6;

[0080] The base 2 is slidably connected to the frame 1, and the frame 1 can be fixed to the ground to increase the stability of the entire device. The base 2 is provided with a power device for driving the base 2 to slide on the frame 1, and the power device is electrically connected to the control system. Other components are installed on the base 2; a through hole is opened on the base 2, and the sampling tube 3 is slidably and rotatably connected to the base 2 through the through hole. The sampling rod 4 is located inside the sampling tube 3, and the sampling rod 4 is rotatably connected to the sampling tube 3. The sampling rod 4 and the sampling tube 3 together constitute a pipeline used for sampling, and the sampling rod 4 and the sampling tube 3 simultaneously penetrate into the grain pile and cooperate with each other to complete the sampling;

[0081] The sliding assembly 5 is fixedly mounted on the frame 1, and the sliding assembly 5 is used to manipulate the sampling tube 3 and the sampling rod 4 to slide up and down. The sliding assembly 5 can control the linear movement of the sampling tube 3 and the sampling rod 4 in the up and down directions, so that the sampling tube 3 and the sampling rod 4 go deep into the grain pile, and the sliding assembly 5 is electrically connected to the control system; the rotating assembly 6 is slidably connected to the base 2 through the sliding assembly 5. Since the rotating assembly 6 is slidably connected to the base 2, the rotating assembly 6 can only slide up and down but cannot rotate itself. The rotating assembly 6 is fixedly connected to the sampling rod 4, and the rotating assembly 6 can drive the sampling rod 4 to rotate relative to the base 2. The rotating assembly 6 is used to manipulate the sampling rod 4 and the sampling tube 3 to rotate, and the rotating assembly 6 is electrically connected to the control system;

[0082] The outer wall of the sampling tube 3 is provided with counterclockwise threaded digging teeth 31, and the digging teeth 31 can help the sampling tube 3 to better extend into the grain pile. The sampling rod 4 is provided with clockwise threaded grain guiding teeth 41, and the grain guiding teeth 41 can achieve the purpose of transporting grain upward by rotating the sampling rod 4, thereby completing a sampling task; compared with the traditional method of using a blower to suck in grain, the grain is driven by the rotation of the threaded grain guiding teeth 41 more stably and reliably, and there will be no situation where grain blocks the air intake pipe and large pieces of grain are difficult to be sucked in.

[0083] In specific implementation: when the vehicle transporting grain arrives at the designated location, the control system controls the power device on the base 2 to drive the base 2 to slide on the frame 1 to reach the appropriate position, and then the control system controls the sliding component 5 to make the sampling tube 3 and the sampling rod 4 penetrate into the grain pile, and then the control system controls the rotating component 6 to drive the sampling rod 4 to rotate, and the grain is driven by the grain guiding teeth 41 to move upward along the inner wall of the sampling tube 3, thereby completing the purpose of sampling.

[0084] When a sufficient amount of grain is collected, the control system controls the rotating component 6 to reverse the sampling rod 4, thereby cleaning out the remaining grain in the sampling tube 3. When the grain in the sampling tube 3 is completely cleaned, the control system controls the sliding component 5 to make the sampling tube 3 and the sampling rod 4 continue to penetrate deeper into the grain pile, and then perform a second sampling, and so on to achieve multi-level sampling at the same point. Such a design can ensure that the amount of grain sampled each time is quantitative and will not be mixed when multiple samplings are performed, thereby ensuring the accuracy of subsequent detection.

[0085] After sampling at one point is completed, the control system controls the sliding assembly 5 to pull out the sampling tube 3, and then the control system controls the power device on the base 2 to drive the base 2 to slide on the frame 1 to the next sampling point, and then starts the sampling work at the next point.

[0086] For the selection of sampling points and sampling depths, a 2×5 layout is adopted. Specifically, two rows of sampling points are set up at intervals of 1.8 meters on the left and right sides of the truck. Each row of sampling points has 5 sampling points, and each point is 1.8 meters apart. This ensures the universality of sampling quality inspection. In addition, each point is sampled once at a depth of 1 meter, 2 meters, and 3 meters. The sampling tube 3 penetrates the grain pile at a speed of about 0.1 meters per second, and 2 kg is sampled each time. According to experimental data, the sampling rod 4 can roll up about 80g of grain per second when rotating forward. When the sampling rod 4 stops rotating, there is a maximum of 600g of grain in the sampling tube 3. According to experimental data, the sampling rod 4 can discharge about 20g of grain per second when reversing.

[0087] The time of each penetration of sampling tube 3:

[0088]

[0089] Time for each forward rotation of the sampling rod 4:

[0090]

[0091] Time for each reversal of the sampling rod 4:

[0092]

[0093] It can be obtained from calculation that the sampling tube 3 penetrates for 10 seconds each time. After reaching the predetermined position, the sampling rod 4 rotates forward for 25 seconds and then reverses for 30 seconds, thereby completing the sampling work of one sample layer. Then the sampling tube 3 continues to penetrate into the next sample layer for sampling. After completing the sampling task of three sample layers at a point, the sampling tube 3 is pulled out of the grain pile and then moved to the next point for sampling.

[0094] Example 2, as Figure 3and Figure 8 As shown, the sliding assembly 5 includes: a sliding motor, a power shaft 51, a first power gear 52 and a rotating rack 53. The base 2 is provided with a rotating frame 21. The sliding motor is fixedly mounted on the base 2. The sliding motor is electrically connected to the control system. One end of the power shaft 51 is fixedly connected to the sliding motor rotor. The sliding motor can drive the power shaft 51 to rotate. The other end of the power shaft 51 is coaxially fixedly mounted with the first power gear 52. The power shaft 51 drives the first power gear 52 to rotate. The middle part of the power shaft 51 is rotatably connected to the rotating frame 21.

[0095] The rotating rack 53 is rotatably connected to the sampling tube 3, and the sampling tube 3 can rotate relative to the rotating rack 53. The through hole of the rotating rack 53 is slidably connected to the base 2, and the rotating rack 53 can slide up and down relative to the base 2. At the same time, the rotating rack 53 will also drive the sampling tube 3 to move up and down synchronously without affecting its own rotation; the rotating rack 53 is engaged with the No. 1 power gear 52, and the No. 1 power gear 52 is used to drive the rotating rack 53 to move up and down. Compared with using the transmission roller and the tube wall to achieve the up and down movement of the sampling tube 3, the method of driving the rotating rack 53 and then driving the sampling tube 3 by the No. 1 gear is more stable, and the pressure is greater and the error is smaller.

[0096] In specific implementation, the control system controls the sliding motor to drive the power shaft 51 to rotate, and the power shaft 51 transmits power to the rotating rack 53 through the No. 1 power gear 52. The rotating rack 53 drives the sampling tube 3 to slide up and down, so that the sampling tube 3 penetrates into the interior of the grain pile.

[0097] Example 3, as Figure 3 and Figure 8 As shown, the sliding assembly 5 further includes: a No. 2 power gear 54, a transmission shaft 55, a No. 1 transmission gear 56 and a No. 2 transmission gear 57. The transmission shaft 55 is rotatably mounted on another rotating frame 21. The No. 1 transmission gear 56 and the No. 2 transmission gear 57 are coaxially fixedly mounted on the rotating shaft. The No. 2 power gear 54 is coaxially fixedly mounted on the power shaft 51. The transmission shaft 55, the No. 1 transmission gear 56 and the No. 2 transmission gear 57 can rotate synchronously; the No. 1 transmission gear 56 is meshed with the rotating rack 53, and the No. 2 transmission gear 57 is meshed with the No. 2 power gear 54.

[0098] The No. 2 power gear 54 can transmit power to the No. 2 transmission gear 57, and then the No. 2 rotating gear drives the transmission shaft 55 and the No. 1 transmission gear 56 to rotate, and the No. 1 transmission gear 56 can drive the rotating rack 53 to move up and down, thereby driving the sampling tube 3 to move up and down; the No. 2 power gear 54 and the No. 2 transmission gear 57 clamp the rotating rack 53 for transmission. Compared with the unilateral meshing transmission, this transmission method is more stable and more uniform in force, avoiding the situation where the sampling tube 3 is pressed against the through hole on the base 2 to cause excessive friction, resulting in increased resistance when the sampling tube 3 moves.

[0099] In specific implementation, the power shaft 51 will drive the No. 2 transmission gear 57 to rotate through the No. 2 power gear 54. The rotation of the No. 2 transmission gear 57 will drive the No. 1 transmission gear 56 to rotate through the transmission shaft 55. The No. 1 transmission gear 56 will cooperate with the No. 1 power gear 52 to drive the rotating rack 53 to move up and down, thereby better driving the sampling tube 3 to slide up and down, so that the sampling tube 3 can penetrate into the interior of the grain pile.

[0100] Example 4, as Figure 2 、 Figure 4 and Figure 5 As shown, a grain guiding plate 42 is fixedly provided on the top of the sampling rod 4, and an annular outlet is provided on the wall of the sampling tube 3 opposite the grain guiding plate 42. The grain is transported upward along the sampling tube 3, and will flow out from the outlet after being blocked by the grain guiding plate 42. The annular outlet can ensure that no matter how the sampling tube 3 rotates, the grain can flow out of the outlet stably; a receiving box 7 is rotatably installed on the outside of the outlet, and the receiving box 7 is fixedly connected to the sliding rack. The receiving box 7 is used to collect the grain transmitted by the sampling tube 3 and will not rotate, so that the function of transit during the grain sampling and transmission process can be realized.

[0101] Example 5, as Figure 3 and Figure 6 As shown, the rotating assembly 6 includes a mounting seat 61, a rotating motor, a rotating shaft 62, an internal gear 63, an external gear 64 and an electric push rod 65. The mounting seat 61 is fixedly connected to the receiving box 7, thereby ensuring that the mounting seat 61 does not rotate. A rotating motor is fixedly installed on the mounting seat 61, and the rotating motor is electrically connected to the control system. The rotor of the rotating motor is fixedly connected to the rotating shaft 62. The control system can control the rotating motor to drive the rotating shaft 62 to rotate. The rotating shaft 62 is fixedly connected to the grain guide plate 42 coaxially, thereby the rotation of the rotating shaft 62 can drive the sampling tube 3 to rotate through the grain guide plate 42;

[0102] The outer gear 64 is slidably connected to the rotating shaft 62, and the electric push rod 65 is fixedly mounted on the grain guide plate 42. The electric push rod 65 is electrically connected to the control system. The upper end of the electric push rod 65 is fixedly connected to the outer gear 64. The electric push rod 65 is used to push the outer gear 64 to slide on the rotating shaft 62. The inner gear 63 is fixedly mounted on the top of the inner wall of the sampling tube 3. The outer gear 64 is pushed by the electric push rod 65 to align the outer gear 64 with the inner gear 63. Thus, the rotating shaft 62 can drive the sampling tube 3 to rotate through the cooperation of the inner gear 63 and the outer gear 64. Through the design of the internal gear 63, the external gear 64 and the electric push rod 65, the purpose of the rotating motor driving the sampling tube 3 can be achieved, and this transmission can be freely switched on and off.

[0103] In specific implementation, when the control system controls the sliding assembly 5 to make the sampling tube 3 and the sampling rod 4 penetrate into the grain pile, the control system controls the electric push rod 65 to contract, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are in contact, and then the control system controls the rotating motor to reverse, and the digging teeth 31 rotate forward to assist in digging. At the same time, the sampling rod 4 reverses, and the grain guiding teeth 41 will not roll up the grain at this time; this design can make the sampling tube 3 more smoothly penetrate into the grain pile, and the upper layer of grain will not enter the sampling tube 3, which can ensure the accuracy of the sample and avoid deviations in analysis after quality inspection due to mixing of upper and lower layers of grain.

[0104] When it reaches the specified position, the control system controls the electric push rod 65 to extend, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are separated. Then the control system controls the rotating motor to rotate forward. At this time, the sampling tube 3 does not rotate, the sampling rod 4 rotates forward, and the grain guiding teeth 41 guide the grain to be transported upward in the sampling tube 3, thereby completing a sampling task; when a sufficient amount of grain is sampled, the control system controls the rotating motor to reverse. At this time, the sampling tube 3 does not rotate, the sampling rod 4 reverses, and the grain guiding teeth 41 guides the grain to be discharged downward from the sampling tube 3, thereby avoiding mixing of grain sampled multiple times. After the grain in the sampling tube 3 is completely discharged from the sampling tube 3, a sampling task is completed.

[0105] After completing a sampling task, the control system controls the electric push rod 65 to retract, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are in contact, and then the sampling tube 3 is made to penetrate deeper into the grain pile through the cooperation of the rotating component 6 and the sliding component 5, followed by a second sampling, and so on to achieve multi-level sampling at the same point.

[0106] After sampling at one point is completed, the control system controls the sliding assembly 5 to pull out the sampling tube 3. At the same time, the control system controls the electric push rod 65 to retract, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are in contact. Then the control system controls the rotating motor to rotate forward. At this time, the sampling tube 3 is reversed, and the sampling rod 4 rotates forward. The forward rotation of the sampling tube 3 will enable the digging teeth 31 to assist in moving upward. Although the sampling rod 4 is rotating forward, it will not draw the grain into the sampling tube 3 because it is moving upward. This design can make the sampling tube 3 leave the grain pile more smoothly, and the grain will not enter the sampling tube 3.

[0107] When the sampling tube 3 leaves a sampling point, all sampling tasks at one point are completed. Then the control system controls the power device on the base 2 to drive the base 2 to slide on the frame 1 to the next sampling point, and then starts the sampling work at the next point.

[0108] Example 6, as Figure 2 and Figure 7 As shown, one end of the hollow tube 8 is fixedly connected to the receiving box 7, and the hollow tube 8 is communicated with the interior of the receiving box 7. The other end of the hollow tube 8 passes through the sand and gravel screening device, the thermometer, the spectral quality inspection machine and the storage bin in sequence; a dust discharge fan 81 is fixedly installed on the side wall of the hollow tube 8, and the dust discharge fan 81 is electrically connected to the control system. The dust discharge fan 81 is communicated with the interior of the hollow tube 8, and a sensor is provided on the dust discharge fan 81, which is used to sense whether there are large particles touching it.

[0109] In specific implementation, the dust discharge fan 81 will generate suction on the food inside the hollow tube 8, and the suction will suck the dust out of the tube. If any food is sucked into the dust discharge fan 81, it will be detected by the sensor. After the sensor transmits the signal to the control system, the control system will control the dust discharge fan 81 to reduce the power, and the attracted food will fall immediately. This design can achieve the purpose of removing dust while ensuring that the food will not be discharged by the dust discharge fan 81.

[0110] After the grain leaves the position of the dust discharge fan 81 in the hollow tube 8, it will undergo sand and stone screening, temperature measurement, quality inspection and other tasks in sequence. Finally, the grain that has completed the entire process will be transported to the storage warehouse to avoid food waste.

[0111] Example 7, as Figure 4 As shown, the lower end of the digging teeth 31 is crescent-shaped and has a sharp lower end surface. The advantage of this design is that the bag of bagged grain can be directly cut open by the digging teeth 31, which saves the device for cutting the bag, simplifies the mechanism, thereby reducing the probability of mechanical failure, improving reliability and reducing costs.

[0112] Example 8, as Figure 4 and Figure 5 As shown, the lower end of the sampling rod 4 extends out of the wall of the sampling tube 3, and the lower end of the grain guiding tooth 41 is in an inverted pagoda shape. This design allows the grain guiding tooth 41 to extend further into the grain pile, thereby better transporting the grain.

[0113] Example 9, as Figure 4 and Figure 5 As shown, rubber pads are fixedly installed on the outer edges of the grain guiding teeth 41 and the digging teeth 31. The purpose of arranging the rubber pads is to avoid the grain guiding teeth 41 and the digging teeth 31 from breaking the grain and causing waste of grain during the rotation process.

[0114] Example 10, as Figure 10 As shown, its workflow is:

[0115] S1: Positioning: Locating the truck transporting grain to ensure accurate progress to the next step;

[0116] S2: Sampling, sampling is carried out by using a sampling device deep into the grain pile;

[0117] S3: Multi-point acquisition, repeating steps S1 to S2 for multiple different points;

[0118] S4: Screening: dust and other impurities are initially screened out by the sampling device, and then the sand and stone screening device is used to further screen out sand and stone impurities;

[0119] S5: temperature measurement, measuring the temperature of the grain sample obtained by sampling in a thermometer;

[0120] S6: Spectral quality inspection: The grain that has been temperature-measured is subjected to spectral quality inspection in the spectral quality inspection machine, and the spectral quality inspection data is then transmitted to the 4G-iRTU device;

[0121] S7: Storage: Storing multiple groups of samples that have been sampled and inspected to avoid food waste;

[0122] S8: Analyze and process the results of the spectrum quality inspection;

[0123] S9: Transmit the processed and analyzed data to the PLC and cloud server;

[0124] S10: The PLC transmits the analyzed data to the display for display.

[0125] Working principle: When the vehicle transporting grain arrives at the designated location, the control system controls the power device on the base 2 to drive the base 2 to slide on the frame 1 to reach the appropriate position. For the selection of sampling points and sampling depths, a 2×5 layout is adopted; specifically, two rows of sampling points are set up at intervals of 1.8 meters in the left and right directions of the truck, and each row of sampling points has 5 sampling points, each point is 1.8 meters apart, and each point is sampled once at a depth of 1 meter, 2 meters, and 3 meters respectively.

[0126] The control system controls the sliding motor to drive the power shaft 51 to rotate, and the power shaft 51 transmits power to the rotating rack 53 through the No. 1 power gear 52; at the same time, the power shaft 51 will drive the No. 2 transmission gear 57 to rotate through the No. 2 power gear 54, and the rotation of the No. 2 transmission gear 57 will drive the No. 1 transmission gear 56 to rotate through the transmission shaft 55. The No. 1 transmission gear 56 will cooperate with the No. 1 power gear 52 to drive the rotating rack 53 to move up and down, thereby better driving the sampling tube 3 to slide up and down, so that the sampling tube 3 can penetrate into the interior of the grain pile.

[0127] While the sampling tube 3 and the sampling rod 4 penetrate into the grain pile, the control system controls the electric push rod 65 to retract, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 fit together. Then the control system controls the rotating motor to reverse, and the digging teeth 31 rotate forward to assist in digging. At the same time, the sampling rod 4 reverses. At this time, the grain guiding teeth 41 will not roll up the grain. The deepening process lasts for 10 seconds to reach the predetermined position.

[0128] When it reaches the predetermined position, the control system controls the electric push rod 65 to extend, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are separated. Then the control system controls the rotating motor to rotate forward. At this time, the sampling tube 3 does not rotate, the sampling rod 4 rotates forward, and the grain guiding teeth 41 guide the grain to be transported upward in the sampling tube 3. When the rotating motor rotates forward for 25 seconds, the sampling work of one sample layer is completed; when the sampling work time reaches 25 seconds, the control system controls the rotating motor to reverse. At this time, the sampling tube 3 does not rotate, the sampling rod 4 reverses, and the grain guiding teeth 41 guides the grain to be discharged downward from the sampling tube 3 in the sampling tube 3, thereby avoiding the mixing of grain sampled multiple times. When the rotating motor reverses for 30 seconds, the grain in the sampling tube 3 is completely discharged from the sampling tube 3, thereby completing a sampling task.

[0129] After completing a sampling task, the control system controls the electric push rod 65 to retract, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are in contact, and then the sampling tube 3 is made to penetrate deeper into the grain pile through the cooperation of the rotating component 6 and the sliding component 5, followed by a second sampling, and so on to achieve multi-level sampling at the same point.

[0130] After sampling at one point is completed, the control system controls the sliding assembly 5 to pull out the sampling tube 3. At the same time, the control system controls the electric push rod 65 to retract, thereby driving the outer gear 64 to slide on the rotating shaft 62 until the outer gear 64 and the inner gear 63 are in contact. Then the control system controls the rotating motor to rotate forward. At this time, the sampling tube 3 is reversed, and the sampling rod 4 rotates forward. The forward rotation of the sampling tube 3 will enable the digging teeth 31 to assist in moving upward. Although the sampling rod 4 is rotating forward, it will not draw the grain into the sampling tube 3 because it is moving upward. This design can make the sampling tube 3 leave the grain pile more smoothly, and the grain will not enter the sampling tube 3.

[0131] When the sampling tube 3 leaves a sampling point, all sampling tasks at that point are completed, and then the control system controls the power device on the base 2 to drive the base 2 to slide on the frame 1 to the next sampling point, and then starts the sampling work at the next point;

[0132] The grain that is rolled up by the grain guiding teeth 41 on the sampling rod 4 and transported upward along the sampling tube 3 will flow out from the outlet on the sampling tube 3 after being blocked by the grain guiding plate 42, and the annular outlet can ensure that no matter how the sampling tube 3 rotates, the grain can flow out from the outlet stably; the grain that flows out of the sampling tube 4 will fall into the receiving box 7, and then fall into the hollow tube 8 under its own gravity.

[0133] When in the hollow tube 8, the dust discharge fan 81 will generate suction on the food inside the hollow tube 8, and the suction will suck the dust out of the tube. If any food is sucked into the dust discharge fan 81, it will be detected by the sensor. After the sensor transmits the signal to the control system, the control system will control the dust discharge fan 81 to reduce the power, and the attracted food will fall immediately. This design can achieve the purpose of removing dust while ensuring that the food will not be discharged by the dust discharge fan 81.

[0134] After the grain leaves the position of the dust discharge fan 81 in the hollow tube 8, it will undergo sand and stone screening, temperature measurement, quality inspection and other tasks in sequence. Finally, the grain that has completed the entire process will be transported to the storage warehouse to avoid food waste.

[0135] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A grain storage sampling and quality inspection integrated machine, including a frame, a control system, a base, a sampling tube, a sampling rod, a sliding assembly, and a rotating assembly, characterized in that: The base is slidably connected to the frame, and a power device is provided on the base for driving the base to slide on the frame. The power device is electrically connected to the control system. The sliding assembly is fixedly mounted on the frame. A through hole is provided on the base, and the sampling tube is slidably and rotatably connected to the base through the through hole. The sampling rod is located inside the sampling tube, and the sampling rod is rotatably connected to the sampling tube. The sliding assembly is fixedly mounted on the frame, and is used to manipulate the sliding of the sampling tube and the sampling rod, and is electrically connected to the control system; the rotating assembly is slidably connected to the base through the sliding assembly, and is fixedly connected to the sampling rod, and is used to manipulate the rotation of the sampling rod and the sampling tube, and is electrically connected to the control system; The outer wall of the sampling tube is provided with counterclockwise threaded digging teeth, and the sampling rod is provided with clockwise threaded grain guiding teeth; A grain guide plate is fixed on the top of the sampling rod, and a ring outlet is opened on the sampling tube wall facing the grain guide plate. A receiving box is rotatably installed on the outside of the outlet, and the receiving box is fixedly connected to the sliding rack. The rotating assembly includes a mounting seat, a rotating motor, a rotating shaft, an internal gear, an external gear and an electric push rod. The mounting seat is fixedly connected to the receiving box, the rotating motor is fixedly installed on the mounting seat, the rotating motor is electrically connected to the control system, the rotor of the rotating motor is fixedly connected to the rotating shaft, the rotating shaft is fixedly connected to the grain guide plate coaxially, the external gear is slidably connected to the rotating shaft, the electric push rod is fixedly installed on the grain guide plate, the electric push rod is electrically connected to the control system, the upper end of the electric push rod is fixedly connected to the external gear, and the internal gear is fixedly installed on the top of the inner wall of the sampling tube; One end of the hollow tube is fixedly connected to the receiving box, the hollow tube is communicated with the inside of the receiving box, and the other end of the hollow tube passes through the sand and gravel screening device, thermometer and spectral quality inspection machine in sequence; a dust discharge fan is fixedly installed on the side wall of the hollow tube, the dust discharge fan is electrically connected to the control system, and the dust discharge fan is communicated with the inside of the hollow tube. A sensor is provided on the dust discharge fan, which is used to sense whether there are large particles touching it.

2. The integrated machine for grain storage sampling and quality inspection according to claim 1, characterized in that: The sliding assembly includes: a sliding motor, a power shaft, a No. 1 power gear and a rotating rack. A rotating rack is provided on the base. The sliding motor is fixedly mounted on the base. The sliding motor is electrically connected to the control system. One end of the power shaft is fixedly connected to the sliding motor rotor. The No. 1 power gear is fixedly mounted coaxially on the other end of the power shaft. The middle portion of the power shaft is rotatably connected to the rotating rack. The rotating rack is rotatably connected to the sampling tube, the rotating rack is slidably connected to the base through the through hole, and the rotating rack is meshed with the No. 1 power gear.

3. The integrated machine for grain storage sampling and quality inspection according to claim 2, characterized in that: The sliding assembly also includes: a No. 2 power gear, a transmission shaft, a No. 1 transmission gear and a No. 2 transmission gear. The transmission shaft is rotatably mounted on another rotating frame. The No. 1 transmission gear and the No. 2 transmission gear are fixedly mounted coaxially on the transmission shaft. The No. 2 power gear is fixedly mounted coaxially on the power shaft. The No. 1 transmission gear is engaged with the rotating rack, and the No. 2 transmission gear is engaged with the No. 2 power gear.

4. The integrated machine for grain storage sampling and quality inspection according to claim 1, characterized in that: The lower end of the digging tooth is crescent-shaped and the lower end surface is sharp.

5. The integrated machine for grain storage sampling and quality inspection according to claim 4, characterized in that: The lower end of the sampling rod extends out of the wall of the sampling tube, and the lower end of the grain guiding tooth is in the shape of an inverted pagoda.

6. The integrated machine for grain storage sampling and quality inspection according to claim 5, characterized in that: Rubber pads are fixedly installed on the outer edges of the grain guiding teeth and digging teeth.

7. The integrated machine for grain storage sampling and quality inspection according to claim 6, wherein the working process is as follows: S1: Positioning: Locating the trucks transporting grain to ensure accurate progress to the next step; S2: Sampling, inserting the sampling device into the grain pile to take samples; S3: Multi-point acquisition, repeating steps S1 to S2 for multiple different points; S4: Screening: The dust impurities are initially screened out by the sampling device, and then the sand and stone impurities are further screened out by the sand and stone screening device; S5: temperature measurement, measuring the temperature of the grain sample obtained by sampling in a thermometer; S6: Spectral quality inspection: The grain that has been temperature-measured is subjected to spectral quality inspection in the spectral quality inspection machine, and the spectral quality inspection data is then transmitted to the 4G-iRTU device; S7: Storage: Storing multiple groups of samples that have been sampled and inspected to avoid food waste; S8: Analyze and process the results of the spectrum quality inspection; S9: Transmit the processed and analyzed data to the PLC and cloud server; S10: The PLC transmits the analyzed data to the display for display.

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