A fully automatic grain sampler

Abstract

The invention discloses a full-automatic grain sampler, which consists of a sampler frame, a longitudinal walking mechanism, a transverse walking mechanism and a sampling rod buffer mechanism. The two ends of the sampler frame are sampler main frames fixed on the sampler base, a sampling structure platform is arranged in the middle of the sampler frame, a longitudinal walking track is laid on the sampling structure platform, and a longitudinal walking mechanism and a transverse walking mechanism are arranged on the upper end of the sampling structure platform; a width measuring arm and a driving device and a length measuring arm and a detection element are installed at the lower part and both sides of the longitudinal walking mechanism, the longitudinal walking mechanism runs on the longitudinal walking mechanism track through longitudinal walking wheels, a transverse walking mechanism is set on the longitudinal walking mechanism, and transverse walking can be realized on the longitudinal walking mechanism, and the sampling rod buffer mechanism is installed on the transverse walking mechanism; the invention avoids the illegal and irregular situations of artificial cheating and collusion between insiders and outsiders, and at the same time ensures that the sampling process is more fair and just, and the obtained inspection samples are more authentic.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery and equipment, and in particular to a full-automatic grain sampler. Background Art

[0002] According to relevant national standards, grain processing, warehousing and other units must sample and test grain during the grain purchasing process, and then use test indicators such as moisture, impurities, and moldy grains to grade and determine the final price of the purchased grain.

[0003] Taking corn as an example, the most primitive way to grade and rank grains in the grain purchase process is to collect samples manually by on-site samplers, and then give indicators such as moisture, impurities, and moldy grains through visual inspection and tooth-biting inspection by inspectors. This depends largely on personal experience and professional ethics, and accuracy and fairness are of course needless to say. Later, as grain testing and analysis instruments were introduced and popularized, the relevant indicators used to determine grain quality were determined through the test results of these analytical instruments, with improved accuracy, and grain purchase pricing became more reasonable.

[0004] So far, although the technology of grain inspection instruments has been continuously improved, the accuracy of test indicators has been continuously improved, and it has been able to meet the actual needs of grain inspection well. A grain sampling machine with patent number CN201610973492.1 includes a cantilever frame arranged horizontally at the upper end of a column, a rotating mechanism is arranged between the cantilever frame and the column, a movable frame is arranged on the cantilever frame, and the movable frame reciprocates along the length direction of the cantilever frame, and a first and a second guiding unit are arranged on the movable frame. The area between the conveyor belts of the first and the second guiding units constitutes a clamping port for clamping the sampling tube, and the power mechanism drives the driving gears of the first and the second guiding units to rotate in opposite directions. The upper end of the sampling tube is connected to the feed port of the sampling barrel through a pipeline, and the sampling barrel is provided with an exhaust port connected to the exhaust port of the exhaust fan. However, this invention is still limited to the state of machinery replacing manual labor. Grain samples are obtained through sampling equipment, and its operation mode is manual remote control. Human factors are involved in the entire sampling process. It is fundamentally limited to the uneven distribution of sampling points. There are very large sampling blind spots, and the sampling points are fixed. It is easy to be used by some unscrupulous vendors, and then take measures such as placing high-quality grains at fixed points or colluding with sampling operators inside and outside, to achieve a huge difference in quality between the sample and the actual object, thereby obtaining higher quality indicators and obtaining more illegal profits.

[0005] There are considerable loopholes in the current grain sample collection process. Whether it is manual sampling or sampling through previous sampling equipment, there are human factors involved in the sampling process, which makes it inevitable that there will be human cheating and collusion between insiders and outsiders in the sampling process; furthermore, due to the limitations of the sampling method and the function of the sampling equipment, the previous sampling equipment cannot achieve full-automatic random sampling of points within the entire vehicle, and cannot achieve piercing to the bottom and the edge, so the inspection samples obtained cannot guarantee their authenticity and representativeness. The sampling process (manual sampling or manually operated sampling equipment) involves human factors, and cannot effectively avoid human cheating and collusion between insiders and outsiders. In the sampling process of previous sampling equipment, there are blind spots in the sampling area, and it is impossible to achieve full-automatic random sampling of points within the entire vehicle, and it is impossible to achieve piercing to the bottom and the edge, so the inspection samples obtained cannot guarantee their authenticity and representativeness. The above defects will easily lead to management loopholes such as human cheating in the grain sampling process, and cannot guarantee fairness and rationality, resulting in great economic losses to grain sellers or grain purchasing companies. Summary of the invention

[0006] In view of this, it is necessary to provide a fully automatic grain sampler, which can avoid the occurrence of illegal and irregular situations such as cheating and collusion between insiders and outsiders, and ensure that the sampling process is more fair and just, and the inspection samples obtained are more authentic.

[0007] The fully automatic grain sampler described in the present invention is composed of a sampler frame, a longitudinal walking mechanism, a transverse walking mechanism and a sampling rod buffer mechanism. When the width of the carriage is identified, a width measuring arm is arranged in the middle of the sampler frame, the middle of the width measuring arm is the carriage, the grain carriage is stopped at a designated position below the sampler, and the operator presses a one-touch start button. The system drives the width measuring arm, the width measuring drive motor and the reducer to drive the drive wheel through the drive chain to move, and moves in the direction of the carriage from both sides of the carriage. When the width measuring arm contacts the side plate of the carriage, the angle of the width measuring arm changes, and the upper end of the width measuring arm continues to move in the box due to the action of the drive wheel, so that the lower end and the upper end of the width measuring arm change from a vertical state to an inclined state. The left inner proximity switch and the right inner proximity switch change their relative positions with the width measuring arm. When the distance increases to a certain extent, the left inner proximity switch and the right inner proximity switch are respectively The on state changes to the off state. After the PLC receives the off signal, the width measuring drive motor and the reducer stop, and the width measuring arm stops moving. Then the left outer photoelectric switch of the width measuring arm and the right outer photoelectric switch of the width measuring arm on both sides can determine the actual width range of the car (the left outer photoelectric switch of the width measuring arm and the right outer photoelectric switch of the width measuring arm are the limit limit points of the left and right movement of the transverse walking mechanism for executing this sampling operation respectively). The transverse walking mechanism can randomly move within the actual width range of the car determined by the left outer photoelectric switch of the width measuring arm and the right outer photoelectric switch of the width measuring arm to perform the sampling operation. After the sampling starts, the width measuring arm returns to the initial position, and the cycle continues. During the sampling process, the car length is identified, and the longitudinal walking mechanism of the sampler together with the transverse walking mechanism installed on it, under the control of the PLC, will gradually move from the front of the car to the rear of the car to perform the sampling operation. Measuring arms are fixed downward on both sides of the longitudinal walking mechanism, a left-beaming photoelectric switch of the measuring arm is provided at the left end of the bottom of the measuring arm, and a right-beaming photoelectric switch of the measuring arm is provided at the right end of the bottom of the measuring arm, one side of which is a transmitting end and the other side is a receiving end; when there is a car between the measuring arms on both sides, the photoelectric switch installed at the bottom of the measuring arm cannot receive the transmitting signal in the opposite direction due to the obstruction of the carriage, and it is regarded as there is a car, and it continues to move randomly to the rear of the carriage to perform the sampling operation; when the longitudinal walking mechanism moves to the rear compartment plate position of the carriage, since there is no carriage blocking between the measuring arms on both sides at this time, the right-beaming photoelectric switch of the measuring arm can receive the photoelectric signal emitted by the left-beaming photoelectric switch of the measuring arm, and the PLC immediately issues a command, the longitudinal walking mechanism stops moving, executes the last sampling operation and then returns to the initial position, and the entire sampling process ends.

[0008] Furthermore, the sampling rod buffer mechanism is installed on the transverse walking mechanism of the sampler, the sprocket Lf is connected with the sprocket Lc through the upper transmission chain, and the sampling rod moves downward through the sprocket Lf and the transmission chain movement control slider, and the sprocket Lc and the sprocket Ld are coaxial sprockets; a motor and a reducer are provided in the rod buffer mechanism, and a driving sprocket is provided at the lower end of the motor and the reducer, and the driving sprocket is connected with the sprocket Lb, the sprocket Ld, and the sprocket Le through the lower transmission chain, and the sprocket Lb and the sprocket Le are fixed at both ends of the shaft; when the sampling rod moves downward and contacts the bottom plate of the carriage downward, the sprocket Lc and the sprocket Ld cannot continue to rotate due to resistance. At this time, the sprocket Lb and the sprocket Le fixed on the shaft are pushed by the chain to move obliquely upward along the shaft sleeve fixed on the frame together with the shaft due to the action of the chain tension.

[0009] Furthermore, the sprocket Lb and the sprocket Le are installed at both ends of the shaft and can move axially with the shaft in the bushing fixed on the frame. When the spring is compressed to a certain extent and the detection plate on the shaft moves to a certain position from the detection switch, the detection switch receives a signal to the PIC, which then transmits it to the motor and reducer to start the reverse operation. At this time, the sampling rod moves upward, thereby completing the upward return stroke of the sampling rod.

[0010] Furthermore, the sampling drill material is a seamless steel pipe, which is composed of an inner tube, an outer tube and a drill head. There is a hollow layer between the inner tube and the outer tube. The upper part of the sampling drill is connected to the cyclone separator in the negative pressure air system through a hose. The inner tube and the outer tube are in contact at the drill head opening, which is achieved by a top screw provided opposite to the drill head opening. When the sampling drill is performing sampling work, under the negative pressure connected to the upper part of the inner tube, the grain sample is continuously sucked in from the drill head opening; because an air replenishment hole is left at the connection between the inner tube and the upper part of the outer tube, the grain sample sucked in at the drill head opening can be properly replenished with air through the hollow layer between the inner tube and the outer tube, which plays a role in assisting the transportation of the grain sample.

[0011] Furthermore, a sampling structure platform is arranged between the sampler frame and the longitudinal walking mechanism, and a longitudinal walking mechanism and a transverse walking mechanism are arranged on the upper end of the sampling structure platform; the longitudinal walking mechanism runs on the longitudinal walking mechanism track through the longitudinal walking wheels, and a transverse walking mechanism is arranged on the longitudinal walking mechanism, so that transverse walking can be realized on the longitudinal walking mechanism, and the sampling rod buffer mechanism is installed on the transverse walking mechanism, and the upper part of the sampling rod buffer mechanism is connected to the sampling rod; a length measuring arm and a width measuring arm for vehicle type identification are installed on both sides of the longitudinal walking mechanism, the longitudinal walking mechanism is driven by the longitudinal driving motor and the reducer through chain transmission, the transverse walking mechanism is driven by the transverse driving motor and the reducer through chain transmission, and the sampling rod is driven by the sampling rod driving motor and the reducer through chain transmission.

[0012] Furthermore, a width measuring arm pin is provided at the upper end of the width measuring arm, and the top of the width measuring arm pin is fixed to the bracket through a connecting and locking device. The upper end of the bracket is a sampling structure platform, and the upper end of the sampling structure platform is a longitudinal walking mechanism and a transverse walking mechanism. The lower end of the sampling structure platform is connected to the sampler main frame and fixed on the sampler base.

[0013] Furthermore, the width measuring arm and the left inner proximity switch and the right inner proximity switch can also be replaced by photoelectric detection modules installed on both sides of the longitudinal travel mechanism or laser detection modules installed on the longitudinal travel mechanism to realize automatic recognition of the width of the carriage. The opposing photoelectric switch on the length measuring arm can also be replaced by a diffuse reflection photoelectric switch or a laser detection component to realize automatic recognition of the length of the carriage.

[0014] Furthermore, the transverse walking mechanism is driven by a transverse driving motor and a reducer through a chain transmission. The lower ends of the transverse driving motor and the reducer are left transverse driving wheels, and the left transverse driving wheel is connected and moved with the right transverse driving wheel through a transverse driving chain.

[0015] Furthermore, the longitudinal walking mechanism is driven by a longitudinal drive motor and a reducer through a chain drive. The lower ends of the longitudinal drive motor and the reducer are connected to the left longitudinal drive wheel through the right longitudinal drive wheel using a longitudinal drive chain. The two ends of the longitudinal walking mechanism are supported by suspensions with a W-shaped canopy at the top, and the canopy is made of steel frame material.

[0016] The advantages of the fully automatic grain sampler provided by the present invention are: on the one hand, the fully automatic grain sampler system can fundamentally eliminate the involvement of human factors in the entire sampling process, and completely avoid the occurrence of illegal and irregular situations such as human cheating and collusion between insiders and outsiders. On the other hand, the fully automatic grain sampler system can realize random point sampling without dead angles in the entire vehicle range, ensuring that it can be inserted to the bottom and the edge, and the sampling process is more fair and just, and the obtained inspection samples are more real and representative. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A side view of the structure of a fully automatic grain sampling machine proposed by the present invention;

[0018] Figure 2 A front view of a fully automatic grain sampler proposed by the present invention;

[0019] Figure 3 A longitudinal drive motor, a reducer, and a transverse drive motor, a reducer in the front view of a fully automatic grain sampler proposed by the present invention;

[0020] Figure 4 A top view of a sampling machine frame of a fully automatic grain sampling machine proposed by the present invention;

[0021] Figure 5 A diagram of a sampling rod buffer mechanism of a fully automatic grain sampler proposed by the present invention;

[0022] Figure 6 This is a partial enlarged view of the sampling rod buffer mechanism of a fully automatic grain sampler proposed by the present invention;

[0023] Figure 7 A structural diagram of a sampling chisel for a fully automatic grain sampling machine proposed by the present invention;

[0024] Figure 8 The present invention provides a process flow chart of a fully automatic grain sampling machine. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The fully automatic grain sampler of the present invention is composed of a sampler frame 100, a longitudinal walking mechanism 200, a transverse walking mechanism 300 and a sampling rod buffer mechanism 400. When the width of the carriage 104 is identified, a width measuring arm 103 is arranged in the middle of the sampler frame 100, and the carriage 104 is in the middle of the width measuring arm 103. The grain truck stops at a designated position below the sampler. The operator presses a one-touch start button, and the system drives the width measuring arm 103 under the drive of the width measuring drive motor and the reducer 115, through the drive chain 103- 2 drives the driving wheel 103-1 to move, and moves from both sides of the carriage 104 to the carriage 104 direction. When the width measuring arm 103 contacts the side plate of the carriage, the angle of the width measuring arm 103 changes, and the upper end of the width measuring arm 103 continues to move in the box due to the action of the driving wheel 103-1, so that the lower end of the width measuring arm 103 and the upper end of the width measuring arm 103 change from a vertical state to an inclined state. The left inner proximity switch 110 and the right inner proximity switch 112 change their relative positions with the width measuring arm 103. When the distance increases to a certain extent, the left inner proximity switch 110 and the right inner proximity switch 112 change their relative positions with the width measuring arm 103. The proximity switch 110 and the right inner proximity switch 112 are changed from the on state to the off state respectively. After the PLC receives the off signals of 110 and 112, the width measuring drive motor and the reducer 115 stop, and the width measuring arm 103 stops moving. Then the left outer photoelectric switch 113 and the right outer photoelectric switch 114 of the width measuring arm on both sides can determine the actual width range of the carriage 104 (the photoelectric switch 113 and the photoelectric switch 114 are the limit limit points of the left and right movement of the transverse walking mechanism 300 for executing this sampling operation respectively). The walking mechanism 300 can randomly move within the actual width of the carriage 104 determined by the left outer photoelectric switch 113 of the width measuring arm and the right outer photoelectric switch 114 of the width measuring arm to perform sampling operations. After the sampling starts, the width measuring arm 103 returns to the initial position, and the cycle is repeated. During the sampling process, the length of the carriage 104 is identified, and the longitudinal walking mechanism 200 of the sampler together with the transverse walking mechanism 300 installed on the upper part thereof, under the control of the PLC, will gradually move from the front of the carriage 104 toward the rear of the carriage to perform the sampling operation.The length measuring arms 102 are fixed downwardly on both sides of the longitudinal walking mechanism 200, and the left end of the bottom of the length measuring arm 102 is provided with a left-beaming photoelectric switch 116 of the length measuring arm, and the right end of the bottom of the length measuring arm 102 is provided with a right-beaming photoelectric switch 117 of the length measuring arm, one side of which is a transmitting end and the other side is a receiving end; when there is a car between the length measuring arms on both sides, due to the obstruction of the carriage, the beaming photoelectric switch installed at the bottom of the length measuring arm cannot receive the opposite transmission signal, and it is regarded as a car, and continues to move randomly to the rear of the carriage to perform the sampling operation; when the longitudinal walking mechanism 200 walks to the rear compartment plate position of the carriage 104, since there is no carriage 104 blocking the length measuring arms on both sides at this time, the right-beaming photoelectric switch 117 of the length measuring arm can receive the photoelectric signal emitted by the left-beaming photoelectric switch 116 of the length measuring arm, and the PLC immediately issues a command, the longitudinal walking mechanism 200 stops moving, performs the last sampling operation and then returns to the initial position, and the whole sampling process ends.

[0027] See also Figure 5 and Figure 6 The sampling brazing rod buffer mechanism 400 is installed on the transverse walking mechanism 300 of the sampling machine, the sprocket Lf405 is connected to the sprocket Lc401 through the upper transmission chain 407, and the sliding block 406 is controlled by the sprocket Lf405 and the transmission chain 407 to make the sampling brazing rod 310 move downward, and the sprocket Lc401 and the sprocket Ld401-1 are coaxial sprockets; the brazing rod buffer mechanism 400 is provided with a motor and a reducer 420, and the lower end of the motor and the reducer 420 is provided with a driving sprocket 403, and the driving sprocket 403 is connected to the lower transmission chain 408 and the sprocket L b402, sprocket Ld401, sprocket Le404 are connected, sprocket Lb402 and sprocket Le404 are fixed at both ends of shaft 413; when the sampling rod 310 moves downward and contacts the bottom plate of the carriage 104 downward, the sprocket Lc401 and sprocket Ld401-1 cannot continue to rotate due to resistance, and the sprocket Lb402 and sprocket Le404 fixed on the shaft 413 are pushed by the chain to move obliquely upward along the shaft sleeve 412 fixed on the frame together with the shaft 413 due to the effect of chain tension. The sampling rod buffer mechanism 400 realizes that the sampling rod 310 moves downward and reaches a certain value of resistance, and the sampling rod 310 will perform a return action, ensuring that the sampling rod 310 can achieve the function of reaching the bottom of the carriage every time it takes samples. The sampling rod 310 can also be returned when reaching a preset appropriate resistance torque during downward sampling through the specially designed electronic buffer detection mechanism on the sampling rod 310 assembly. This ensures that the sampling rod 310 can return only when the rod tip touches the bottom of the carriage 104 when executing each sampling instruction, so that the rod tip can touch the bottom of the carriage 104 without causing damage to the bottom of the carriage 104, and the sampling process is more complete.

[0028] The sprocket Lb402 and the sprocket Le404 are installed at both ends of the shaft 413, and can move axially with the shaft 413 in the sleeve 412 fixed on the frame. When the spring 411 is compressed to a certain extent and the detection plate 409 on the shaft 413 moves to a certain position from the detection switch 410, the detection switch 410 receives the signal and sends it to the PIC, which then transmits it to the motor and reducer 420 to start the reverse operation. At this time, the sampling rod 310 moves upward, thereby completing the upward return stroke of the sampling rod 310.

[0029] See also Figure 7 The sampling drill 310 is made of seamless steel pipe, which is composed of an inner tube 312, an outer tube 311 and a drill bit 313. There is a hollow layer 317 between the inner tube 312 and the outer tube 311. The upper part of the sampling drill 310 is connected to the cyclone separator 319 in the negative pressure air system through a hose 318. The inner tube 312 and the outer tube 311 are in contact at the drill bit opening 314, which is achieved by a top screw 316 provided opposite to the drill bit opening 314. When the sampling drill is taking samples, the grain sample is continuously sucked in from the opening 314 of the drill head 313 under the negative pressure connected to the upper part of the inner tube 312; since there is an air supply hole at the connection between the inner tube 312 and the upper part of the outer tube 311, the grain sample sucked in from the opening 314 of the drill head 313 can be properly supplied with air through the hollow layer 317 between the inner tube 312 and the outer tube 311, which plays a role in assisting the transportation of the grain sample. When the sampling drill 310 extracts the sample, the sample and part of the air will enter the inner tube through the opening of the drill head under the negative pressure. The air (supplement air) entering through the gap between the upper parts of the inner and outer tubes will enter the inner tube from the gap at the bottom of the inner tube. Under the negative pressure, the air will be assisted by the hollow layer 317 of the inner tube 312 and the outer tube 311 to transport the extracted sample to the laboratory through the hose 318. Practice has proved that this structure has high sampling efficiency and can effectively prevent the common sampling rod from being blocked during the sampling process and the necessary parking and unblocking, thereby improving the stability and continuity of system operation and better meeting the user's requirements.

[0030] A sampling structure platform 105 is provided between the sampling machine frame 100 and the longitudinal walking mechanism 200, and a longitudinal walking mechanism 200 and a transverse walking mechanism 300 are provided on the upper end of the sampling structure platform 305; the longitudinal walking mechanism 200 runs on the longitudinal walking mechanism track 208 through the longitudinal walking wheel 207, and a transverse walking mechanism 300 is provided on the longitudinal walking mechanism 200, so that transverse walking can be realized on the longitudinal walking mechanism 200, and a sampling rod buffer mechanism 400 is installed on the transverse walking mechanism 300, and the upper part of the sampling rod buffer mechanism 400 is connected to the sampling rod 310; a length measuring arm 102 and a width measuring arm 103 for vehicle type identification are installed on both sides of the longitudinal walking mechanism 200, the longitudinal walking mechanism 200 is driven by the longitudinal driving motor and the reducer 203 through chain transmission, the transverse walking mechanism 300 is driven by the transverse driving motor and the reducer 202 through chain transmission, and the sampling rod 310 is driven by the sampling rod driving motor and the reducer 315 through chain transmission.

[0031] A width measuring arm pin 109 is provided at the upper end of the width measuring arm 117, and the top of the width measuring arm pin 109 is fixed to the bracket 105 through a connecting and locking device 106. The upper end of the bracket 105 is a sampling structure platform 305, and the upper end of the sampling structure platform 305 is a longitudinal walking mechanism 200 and a transverse walking mechanism 300. The lower end of the sampling structure platform 305 is connected to the sampler main frame 118 and fixed on the sampler base 119.

[0032] The width measuring arm 103 and the left inner proximity switch 110 and the right inner proximity switch 112 can also be replaced by photoelectric detection modules installed on both sides of the longitudinal travel mechanism 200 or laser detection modules installed on the longitudinal travel mechanism 200 to realize automatic recognition of the width of the carriage 104. The beam photoelectric switch 117 on the length measuring arm 102 can also be replaced by a diffuse reflection photoelectric switch or a laser detection component to realize automatic recognition of the length of the carriage 104.

[0033] The transverse walking mechanism 300 is driven by a transverse driving motor and a reducer 202 through a chain transmission. The lower end of the transverse driving motor and the reducer 202 is a left transverse driving wheel 204, and the left transverse driving wheel 204 is connected to the right transverse driving wheel 205 through a transverse driving chain 206 for movement.

[0034] The longitudinal walking mechanism 200 is driven by a longitudinal driving motor and a reducer 203 through a chain drive. The lower end of the longitudinal driving motor and the reducer 203 is connected to the left longitudinal driving wheel 201 through a right longitudinal driving wheel 232 using a longitudinal driving chain 233. The two ends of the longitudinal walking mechanism 200 are supported by a suspension 304 with a W-shaped canopy 303 at the top. The canopy 303 is made of a steel frame material.

[0035] On the steel structure platform of the sampler, two tracks are arranged in the longitudinal direction for the longitudinal walking mechanism 200 (one or two sets) of the sampler to walk longitudinally (in the length direction of the grain vehicle to be inspected). On the longitudinal walking mechanism 200, one or two sets of transverse walking mechanisms 300 are arranged, which can realize transverse walking (in the width direction of the grain vehicle to be inspected) on the longitudinal walking mechanism. The sampling rod 310 assembly (including the sampling rod buffer mechanism 400) is installed on the transverse walking mechanism 300, and the upper part of the sampling rod tube is connected to the cyclone separator 319 in the negative pressure system generated by the Roots blower. On both sides of the lower part of the longitudinal walking mechanism 200, there are length measuring arms 102 and width measuring arms 103 devices for automatic vehicle type recognition. The longitudinal walking mechanism 200, the transverse walking mechanism 300, the sampling rod 310 and the width measuring arm 103 are driven by their respective motors and reducers through chain transmission.

[0036] When the grain truck to be inspected stops at the designated position below the sampler and turns off the engine, and after the driver gets off the truck and leaves the sampling area, the sampler operator presses the start button, and the longitudinal travel mechanism 200 of the sampler moves randomly from the front of the carriage to the rear of the carriage under the automatic control of the PLC program. After the longitudinal travel mechanism 200 stops, the carriage width recognition device starts to recognize and confirm the width of the carriage, and then the transverse travel mechanism 300 moves randomly on the longitudinal travel mechanism 200 (within the width range of the carriage that has been recognized and confirmed) and performs the sampling operation. Through the vehicle type automatic recognition device (recognizing the length and width of the carriage), it can be realized that within the rectangular range formed by the length and width of the carriage, a sampling operation is performed at random points, and then through the sampling rod buffer mechanism 400, it can be ensured that the sampling rod 310 can reach the bottom of the carriage every time sampling is performed, and the entire sampling process ends when it reaches the rear of the carriage (identified by the length measuring device).

[0037] See also Figure 8 The obtained grain samples are transported to the cyclone separator 319 near the laboratory through the negative pressure system connected to the upper part of the sampling rod 310, and are collected after centrifugal sedimentation in the cyclone separator 319. The samples are then placed in the laboratory by the electric sample placing valve at the bottom of the cyclone separator and through the sample mixing and dividing device. The sample indicators are tested and analyzed, and the excess samples are directly discharged into the waste sample bin.

[0038] This startup operation mode ensures that the PLC completes each process in sequence according to the preset program during the entire sampling process, and the sample collection points are randomly assigned by the program, completely eliminating the influence of human factors on the samples. Since there is no human factor involved, it can effectively avoid the occurrence of favoritism, fraud, collusion between insiders and outsiders, and avoid the huge losses caused to grain sellers or grain purchasing companies, and ensure fairness and impartiality in the sampling process.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully automatic grain sampler, comprising a sampler frame (100), a longitudinal walking mechanism (200), a transverse walking mechanism (300) and a sampling rod buffer mechanism (400), characterized in that: When identifying the width of the carriage (104), a width measuring arm (103) is provided in the middle of the sampler frame (100), and the carriage (104) is in the middle of the width measuring arm (103). The grain vehicle stops at a designated position below the sampler, and the operator presses a one-touch start button. The system drives the width measuring arm (103) under the drive of the width measuring drive motor and the reducer (115), and drives the drive wheel (103-1) through the drive chain (103-2), and moves from both sides of the carriage (104) in the direction of the carriage (104). When the width measuring arm (103) contacts the carriage When the side plate is moved, the angle of the width measuring arm (103) changes, and the upper end of the width measuring arm (103) continues to move in the box due to the action of the driving wheel (103-1), so that the lower end of the width measuring arm (103) and the upper end of the width measuring arm (103) change from a vertical state to an inclined state. The left inner proximity switch (110) and the right inner proximity switch (112) change their relative positions with the width measuring arm (103). When the distance increases to a certain extent, the left inner proximity switch (110) and the right inner proximity switch (112) change from an on state to an off state, respectively, and the PLC After receiving the closing signal from the left inner proximity switch (110) and the right inner proximity switch (112), the width measuring drive motor and the reducer (115) stop, and the width measuring arm (103) stops moving. Then, the left outer photoelectric switch (113) and the right outer photoelectric switch (114) of the width measuring arm on both sides can determine the actual width range of the carriage (104). The photoelectric switch (113) and the photoelectric switch (114) are the limit limit points for the transverse walking mechanism (300) to move to the left and right for executing the sampling operation. The transverse walking mechanism (300) can randomly move within the actual width range of the carriage (104) determined by the left outer photoelectric switch (113) and the right outer photoelectric switch (114) of the width measuring arm to perform the sampling operation. After the sampling starts, the width measuring arm (103) returns to the initial position, and the cycle continues. During the sampling process, the carriage (104) 4) Length identification: the longitudinal walking mechanism (200) of the sampling machine together with the transverse walking mechanism (300) installed on the upper part thereof, under the control of the PLC, will gradually move from the front of the carriage (104) to the rear of the carriage to perform the sampling operation; length measuring arms (102) are fixed downward on both sides of the longitudinal walking mechanism (200); a left-beaming photoelectric switch (116) of the length measuring arm is provided at the left end of the bottom of the length measuring arm (102); and a right-beaming photoelectric switch (117) of the length measuring arm is provided at the right end of the bottom of the length measuring arm (102), one side of which is a transmitting end and the other side is a receiving end; when there is a car between the two length measuring arms, due to the obstruction of the carriage (104), the beaming photoelectric switch (117) installed at the bottom of the length measuring arm (102) cannot receive the opposite transmission signal, and it is considered that there is a car, and it continues to move randomly toward the rear of the carriage (104) to perform the sampling operation;When the longitudinal walking mechanism (200) moves to the rear compartment plate position of the carriage (104), since there is no carriage (104) blocking the length measuring arms on both sides at this time, the right-side photoelectric switch (117) of the length measuring arm can receive the photoelectric signal emitted by the left-side photoelectric switch (116) of the length measuring arm, and the PLC immediately issues a command, the longitudinal walking mechanism (200) stops moving, performs the last sampling operation, and then returns to the initial position, and the entire sampling process ends; The sampling braze buffer mechanism (400) is installed on the transverse walking mechanism (300) of the sampling machine; the sprocket Lf (405) is connected to the sprocket Lc (401) via an upper transmission chain (407); the sprocket Lf (405) and the transmission chain (407) move to control the slider (406) so that the sampling braze (310) moves downward; the sprocket Lc (401) and the sprocket Ld (401-1) are coaxial sprockets; a motor and a reducer (420) are provided in the braze buffer mechanism (400); a driving sprocket (403) is provided at the lower end of the motor and the reducer (420); the driving sprocket (403) is connected to the sampling braze (310) via a lower transmission chain (408) and the sprocket Lb (402), sprocket Ld (401-1), and sprocket Le (404), and sprocket Lb (402) and sprocket Le (404) are fixed at both ends of the shaft (413); when the sampling rod (310) moves downward and contacts the bottom plate of the carriage (104), the sprocket Lc (401) and sprocket Ld (401-1) cannot continue to rotate due to resistance, and at this time, the sprocket Lb (402) and sprocket Le (404) fixed on the shaft (413) are pushed by the chain to move obliquely upward along the shaft sleeve (412) fixed on the frame due to the tension of the chain; The sprocket Lb (402) and the sprocket Le (404) are installed at both ends of the shaft (413) and can move axially along with the shaft (413) in a shaft sleeve (412) fixed on the frame. When the spring (411) is compressed to a certain extent and the detection plate (409) on the shaft (413) moves to a certain position away from the detection switch (410), the detection switch (410) receives a signal and sends it to the PIC, which then transmits the signal to the motor and the reducer (420) to start the reverse operation. At this time, the sampling rod (310) moves upward, thereby completing the upward return stroke of the sampling rod (310); A sampling structure platform (305) is arranged between the sampling machine frame (100) and the longitudinal walking mechanism (200), and a longitudinal walking mechanism (200) and a transverse walking mechanism (300) are arranged on the upper end of the sampling structure platform (305); the longitudinal walking mechanism (200) runs on the longitudinal walking mechanism track (208) via the longitudinal walking wheels (207), and a transverse walking mechanism (300) is arranged on the longitudinal walking mechanism (200) so as to realize transverse walking on the longitudinal walking mechanism (200), and the sampling rod buffer mechanism (400) is arranged on the transverse walking mechanism. On the walking mechanism (300), the upper part of the sampling rod buffer mechanism (400) is connected to the sampling rod (310); a length measuring arm (102) and a width measuring arm (103) for vehicle type identification are installed on both sides of the longitudinal walking mechanism (200); the longitudinal walking mechanism (200) is driven by a longitudinal driving motor and a reducer (203) through a chain transmission; the transverse walking mechanism (300) is driven by a transverse driving motor and a reducer (202) through a chain transmission; and the sampling rod (310) is driven by a sampling rod driving motor and a reducer (315) through a chain transmission.

2. A fully automatic grain sampler according to claim 1, characterized in that: The sampling drill (310) is made of a seamless steel pipe and is composed of an inner tube (312), an outer tube (311) and a drill head (313). A hollow layer (317) is provided between the inner tube (312) and the outer tube (311). The upper portion of the sampling drill (310) is connected to a cyclone separator (319) in a negative pressure air system via a hose (318). The inner tube (312) and the outer tube (311) are in contact at the drill head opening (314). A top screw (317) is provided opposite to the drill head opening (314). 316); when the sampling drill is performing sampling work, the grain sample is continuously sucked in from the opening (314) of the drill head (313) under the action of the negative pressure connected to the upper part of the inner tube (312); since an air replenishing hole is left at the connection between the inner tube (312) and the upper part of the outer tube (311), the grain sample sucked in from the opening (314) of the drill head (313) can be properly replenished with air through the hollow layer (317) between the inner tube (312) and the outer tube (311), thereby playing a role in assisting the transportation of the grain sample.

3. A fully automatic grain sampler according to claim 1, characterized in that: The upper end of the width measuring arm (117) is provided with a width measuring arm pin shaft (109), the top of the width measuring arm pin shaft (109) is fixed to the bracket (105) through a connecting and locking device (106), the upper end of the bracket (105) is a sampling structure platform (305), the upper end of the sampling structure platform (305) is a longitudinal walking mechanism (200) and a transverse walking mechanism (300), and the lower end of the sampling structure platform (305) is connected to the sampling machine main frame (118) and fixed to the sampling machine base (119).

4. A fully automatic grain sampler according to claim 1, characterized in that: The width measuring arm (103) and the left inner proximity switch (110) and the right inner proximity switch (112) may also be replaced by photoelectric detection modules installed on both sides of the longitudinal walking mechanism (200) or by laser detection modules installed on the longitudinal walking mechanism (200) to realize automatic recognition of the width of the carriage (104); the opposing photoelectric switch (117) on the length measuring arm (102) may also be replaced by a diffuse reflection photoelectric switch or a laser detection component to realize automatic recognition of the length of the carriage (104).

5. The fully automatic grain sampler according to claim 1, characterized in that: The transverse walking mechanism (300) is driven by a transverse driving motor and a reducer (202) through a chain transmission. The lower end of the transverse driving motor and the reducer (202) is a left transverse driving wheel (204). The left transverse driving wheel (204) is connected to move with a right transverse driving wheel (205) through a transverse driving chain (206).

6. A fully automatic grain sampler according to claim 1, characterized in that: The longitudinal walking mechanism (200) is driven by a longitudinal driving motor and a reducer (203) through a chain transmission. The lower ends of the longitudinal driving motor and the reducer (203) are connected to the left longitudinal driving wheel (201) through a right longitudinal driving wheel (232) by means of a longitudinal driving chain (233). The two ends of the longitudinal walking mechanism (200) support a W-shaped canopy (303) at the top through a suspension (304). The canopy (303) is made of a steel frame material.

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