Automatic sampling and separating system and use method thereof

Abstract

The invention discloses an automatic sampling and separating system and a use method thereof. The automatic sampling and separating system comprises a conveyor for conveying grains, a head sampler, a divider and a sample collector, the head sampler is located at the head end of the conveyor and comprises a moving mechanism and a sampling hopper which is driven by the moving mechanism to move in the transverse direction of the conveyor, the sampling hopper is communicated with the divider through a sampling pipe, and the divider is used for dividing grains conveyed by the sampling pipe. And the sample collector is used for collecting the grains divided by the divider. Therefore, sampling and sample separation in the grain warehousing and conveying process are realized, the problem of long sampling time in the prior art is solved, the inspection speed is increased, and the grain collecting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain sampling, and in particular to an automatic sampling and sorting system and a use method thereof. Background Art

[0002] At present, storage enterprises store grain in shallow circular silos, large diameter silos, vertical silos, etc. Before the grain is stored, the grain quality needs to be inspected, and the grain purchase price and storage conditions are determined based on the grain impurities, moisture, and bulk density data. In the past, the inspection method was mostly to sample the grain carried in the vehicle. This method requires the vehicle or ship to stop for sampling, which takes a long time to sample, and it is not easy to achieve continuous sampling inspection of grain, resulting in slow inspection speed and serious impact on grain collection efficiency; and the traditional sampling method is manual sampling, which has its strong subjectivity, low efficiency, and is prone to errors or mistakes, resulting in the lack of sampling and sampling accuracy, which can no longer meet the needs of the modern grain storage industry. Especially for bulk commodities such as soybeans that require frequent unloading and unloading operations, how to improve sampling efficiency while ensuring the representativeness of sampling has become an urgent problem to be solved.

[0003] Automatic sampling and splitting technology has the characteristics of high precision and high efficiency. It uses a motor-controlled head sampler, an efficient splitter and a fully automated sample collection system to achieve full process automation from sampling to splitting. It can not only ensure the representativeness of the sample, but also greatly reduce labor costs and human errors, thereby effectively improving the overall level of grain storage management and becoming a research focus of my country's grain storage industry. However, although the existing automatic sampling and splitting system has achieved the purpose of automated and efficient sampling, due to the design of components such as the head sampler and splitter and the motor automatic control factors, the complete grain rate of the sample obtained is insufficient, the damaged grain rate and broken grain rate are high, and the impurity content is also higher than the actual level.

[0004] Therefore, how to improve the representativeness of samples taken by the automatic sampling and sorting system and ensure the accuracy and reliability of the test results remains an urgent problem to be solved. Summary of the invention

[0005] In order to solve the problems that the existing automatic sampling and sorting systems have insufficient complete grain rate, high damaged grain rate and broken grain rate, and impurity content higher than the actual level, the present invention provides an automatic sampling and sorting system and its use method; through the precise design and control of the key technical parameters and performance indicators of the system, the efficient, safe and reliable operation of the automatic sampling and sorting equipment in the warehousing and transportation process of grains such as soybeans is ensured, and the integrity of the samples is improved, ensuring the representativeness of the samples and the accuracy of the detection. The specific technical scheme is as follows:

[0006] First, the present invention provides an automatic sampling and sorting system, which includes a conveyor for conveying grain, a head sampler, a reducer, a sample collector and a control system; the head sampler is located at the head end of the conveyor, and cuts and samples from the continuously flowing grain at preset time intervals under the control of a motor; the head sampler includes a moving mechanism and a sampling bucket that is driven by the moving mechanism to move along the lateral direction of the conveyor, and is connected to the reducer through a sampling tube; the reducer is used to divide the collected samples to meet the needs of subsequent experiments and analyses; the reducer is connected to a sample collection container through a sample transfer tube, and the sample collector is used to temporarily store grain samples after being sorted by the reducer; the control system is used to automatically control the sampling process.

[0007] The aforementioned automatic sampling and sorting system, the mobile mechanism includes a mobile bracket, the mobile bracket is provided with a sampling motor, a driving sprocket, a driven sprocket and a chain installed on the driving sprocket and the driven sprocket; the sampling motor is a dust explosion-proof motor, the voltage level is 380V / 3 / 50HZ, and the power reserve coefficient is not less than 1; the driving sprocket is driven to rotate by the sampling motor, and the sampling bucket is connected to the chain; the sampling bucket is located at the bottom of the mobile bracket, and is connected to the chain through a suspension rod.

[0008] Preferably, in the aforementioned automatic sampling and sorting system, the suspension rod is provided with a rolling support wheel, and the rolling support wheel is rollingly arranged on a movable bracket; and a protective cover is arranged on the movable bracket.

[0009] Preferably, in the aforementioned automatic sampling and sorting system, a baffle is provided on the side of the head end of the conveyor, and when the sampling bucket moves to the side position of the head end of the conveyor, the baffle blocks the entrance of the sampling bucket, and a seal is provided between the sampling bucket and the baffle; the head sampler is a sliding cutting sampler, and the cutting port is made of 304 stainless steel material, and the cutting port width is 2500mm.

[0010] Preferably, in the aforementioned automatic sampling and sorting system, the moving mechanism is provided with a limit safety switch and a proximity switch for detecting the sampling bucket.

[0011] Preferably, in the aforementioned automatic sampling and dividing system, the reducer is an adjustable reducer capable of adjusting the sample flow rate and the reduction ratio, and the reduction ratio adjustment range is between 1:4 and 1:16; the motor of the reducer is a dust-proof explosion-proof motor, and the voltage level is 380V / 3 / 50HZ.

[0012] Preferably, in the aforementioned automatic sampling and splitting system, the sample transfer tube is a stainless steel tank, and its inner diameter is not less than 80 mm; the sample collector is a multi-station rotary sample collector, including 12 rotary sample storage tanks, and a motor drives a disc conveyor to deliver the shrunken samples into designated collection tanks; all tanks are made of high-density polyethylene material, and the volume of each tank is 10L.

[0013] Preferably, in the aforementioned automatic sampling and sorting system, the control system is a PLC control system, which includes two control modes: "automatic" and "semi-automatic"; the control system is composed of a CPU module, a digital input module and a digital output module; the CPU module is responsible for the overall control and data processing of the system, and includes an operating interface for interaction with the user, and the user touches the screen or presses buttons to operate; the digital input module is used to receive signals from various sensors, including sampling interval timing signals, sampling position signals and equipment fault signals; the digital output module is responsible for issuing control instructions to each actuator, including equipment start and stop, fault alarm and status indication.

[0014] Preferably, the aforementioned automatic sampling and sorting system also includes a return device and a fault alarm system; the return device includes a return pipe for discharging excess grain divided by the divider; the fault alarm system, when a fault occurs, can promptly send an alarm signal to the user on the operation interface, and display the fault type and location, to facilitate rapid positioning and processing.

[0015] Secondly, the present invention also provides a method for using the aforementioned automatic sampling and sorting system, comprising the following steps:

[0016] Step A: Start the conveyor, select the "Automatic" mode on the user interface, and the system starts automatically; the head sampler is in a non-working state and stays outside the grain flow;

[0017] Step B: After the conveyor is running, the head sampler is automatically controlled by the PLC control system to cut into the grain flow according to the set sampling cycle to perform full-section sampling;

[0018] Step C: the sample collected by the head sampler then enters the reducer, and the reduction ratio of the reducer is set in the range of 1:4 to 1:16; the sampler is divided in the reducer according to the preset reduction ratio;

[0019] Step D: The sample divided by the divider is transported to the sample storage tank of the sample collection container through the sample transfer tube;

[0020] Step E: After the first sample tank is collected, the PLC control system controls the sample collection container to automatically switch to the next sample storage tank to maintain continuous and efficient sample collection;

[0021] Step F: The entire operation process is monitored in real time by the PLC control system to ensure the smooth operation of each link, and to promptly alarm when a fault occurs to ensure the safety and reliability of the operation.

[0022] Beneficial effects of the present invention:

[0023] 1) The automatic sampling and sorting system of the present invention realizes automatic sampling and sorting of grains during the process of grains being transported by the belt conveyor, that is, during the process of grains entering the warehouse, by setting the head sampler, the reducer and the sample collector, and by setting the return device, the excess grains can be sent to the warehouse, thereby realizing automatic sampling and sorting of grains during the process of grains entering the warehouse.

[0024] 2) The automatic sampling and dividing system of the present invention has a head sampler that quickly cuts the entire cross-section of grain from the continuously flowing grain horizontally at preset time intervals. The sample is highly representative, which improves the sampling and dividing inspection speed and the grain collection efficiency. After the sampling is completed, the sample is sent to the reducer in a sealed stainless steel transfer tube. The reducer divides the sample into several parts according to the set ratio to maintain the uniformity of the sample. Finally, the sample is automatically sent to a multi-station rotary sample collector to prevent contamination and ensure the integrity of the sample. The entire process is controlled by a PLC program to ensure automated, efficient and accurate sampling and dividing operations.

[0025] 3) The reducer of the automatic sampling and dividing system of the present invention is designed based on fluid dynamics, and can adjust the sample flow rate and the reduction ratio to achieve accurate segmentation of the sample. The reduction ratio of the reducer is controlled to be adjusted between 1:4 and 1:16, which can adapt to the sampling requirements of different flow rates while ensuring that no damage is caused to the grain during the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the automatic sampling and sorting system of the present invention;

[0027] Figure 2 Another structural schematic diagram of the automatic sampling and sorting system of the present invention;

[0028] Figure 3 A schematic diagram of the sampling bucket of the automatic sampling and dividing system of the present invention when it is in the middle position;

[0029] Figure 4 A schematic diagram of the automatic sampling and dividing system of the present invention when the sampling bucket stops at one end of the movable bracket (without the protective cover).

[0030] In the figure: 1. conveyor; 2. granary; 3. sampling bucket; 4. mobile bracket; 5. driving sprocket; 6. driven sprocket; 7. chain; 8. sampling motor; 9. suspension rod; 10. rolling support wheel; 11. protective cover; 12. baffle; 13. sealing ring; 14. limit safety switch; 15. sampling tube; 16. reducer; 17. sample collector; 18. collection tube; 19. return device. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. And the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment is an automatic sampling and dividing system and its use method, refer to Figures 1 to 4 The automatic sampling and dividing system comprises a conveyor 1 for conveying grain, a head sampler, a divider 16, a sample collector 17 and a control system. The head sampler is located at the head end of the conveyor, and cuts and samples from the continuously flowing grain at preset time intervals under the control of a motor; the head sampler comprises a moving mechanism and a sampling hopper driven by the moving mechanism to move along the lateral direction of the conveyor, which is connected to the divider through a sampling tube; the divider is used to divide the collected samples to meet the needs of subsequent experiments and analysis; the divider is connected to a sample collection container through a sample transfer tube, and the sample collector is used to temporarily store grain samples divided by the divider; the control system is used to automatically control the sampling process.

[0034] Specifically, in this embodiment, the conveyor 1 includes a belt conveyor, which is located above the granary 2. Through the setting of the conveyor 1, the transportation of grain, that is, the entry of grain into the granary, is realized. The belt conveyor has the advantages of large conveying capacity, simple structure, convenient maintenance, and standardized components. It is used to convey loose materials (such as bulk grain) and can realize rapid, continuous and stable transportation of grain. When the bulk grain is transported to the end by the belt conveyor, the bulk grain automatically falls, and the falling has a certain initial velocity and falls in a parabolic trajectory.

[0035] The head sampler of the automatic sampling and sorting system described in this embodiment is located at the head end of the conveyor 1, and the head sampler includes a moving mechanism and a sampling bucket 3 driven by the moving mechanism to move along the lateral direction of the conveyor 1. The moving mechanism includes a moving bracket 4, which is arranged in the lateral direction of the conveyor 1 and is located above the head end of the conveyor 1. The two ends of the moving bracket 4 are respectively provided with a driving sprocket 5 and a driven sprocket 6, and a chain 7 is installed on the driving sprocket 5 and the driven sprocket 6 for transmission. A sampling motor 8 is installed on the moving bracket 4 to drive the driving sprocket 5 to rotate, and the sampling motor 8 adopts a dust explosion-proof motor. The sampling bucket 3 is located at the bottom of the mobile bracket 4. The top of the sampling bucket 3 is connected to the chain 7 through two suspension rods 9. Rolling support wheels 10 are arranged on both sides of the suspension rods 9. The rolling support wheels 10 are rollingly arranged on the mobile bracket 4. The sampling bucket 3 is connected to the chain 7 through the suspension rod 9, and the suspension rod 9 is supported on the mobile bracket 4 through the rolling support wheels 10. The rolling support wheels 10 play a supporting role, that is, the sampling bucket 3 is moved and arranged on the mobile bracket 4. Through the arrangement of the sprocket chain 7, the sprocket is rotated with the sampling motor 8, and the sprocket is driven to rotate, and then the suspension rod 9 is driven to move, so that the suspended sampling bucket 3 is moved along the lateral direction of the conveyor 1. The lateral movement of the sampling bucket 3 is a full-section cutting type, which can quickly cut the full-section of grain from the horizontal direction, and the sample is highly representative. When the sampling bucket 3 is not in use, it stops at both ends of the mobile bracket 4, that is, it stops outside the grain flow. The speed of the cutting has little effect on the grain flow. The sampling bucket 3 is made of 304 stainless steel, which has excellent corrosion resistance and long life. The cutting width is 2500mm, which can effectively cover the full section of the grain flow. The motor of the head sampler is a dust explosion-proof motor, the explosion-proof level meets the use requirements, the voltage level is 380V / 3 / 50HZ, and the power reserve coefficient is not less than 1, ensuring the safe operation of the equipment in an industrial dust environment.

[0036] In this embodiment, a protective cover 11 is provided on the mobile bracket 4 of the automatic sampling and sorting system, and a quick connection method is adopted for easy installation and disassembly. Through the provision of the protective cover 11, the exposed components, such as the sampling motor 8, the driving sprocket 5, the driven sprocket 6, and the chain 7 are covered by the protective cover 11, which plays a protective, waterproof, dustproof and moisture-proof role for all exposed electrical equipment and components, and prevents the rotating parts from being inflexible and stuck.

[0037] In addition, the automatic sampling and sorting system described in this embodiment is provided with baffles 12 on both sides of the head end of the conveyor 1. When the sampling bucket 3 moves to the positions on both sides of the head end of the conveyor 1, that is, close to the two end positions of the movable bracket 4, the baffle 12 blocks the entrance of the sampling bucket 3, and the entrance of the sampling bucket 3, that is, the side facing the baffle 12, is provided with a sealing structure, such as a sealing ring 13, which is sealed with the baffle 12, that is, the entrance of the sampling bucket 3 is blocked by the baffle 12, and no more food will enter, and sampling will no longer be performed. In addition, the sampling bucket 3 of the automatic sampling and sorting system described in this embodiment is inclined near one side of the conveyor 1, and the bottom of the sampling bucket 3 is closed. By setting one side inclined, the longitudinal cross-section of the sampling bucket 3 is conical, that is, the bottom of the sampling bucket 3 is closed, which is convenient for the sampling bucket 3 to collect and sample food.

[0038] In this embodiment, the mobile bracket 4 of the automatic sampling and sorting system is provided with a limit safety switch 14 and a proximity switch near both ends for detecting the sampling bucket 3. By setting the limit safety switch 14, the movement of the sampling bucket 3 can be stopped to ensure that the sampling bucket 3 stops safely at the specified position. By setting the proximity switch, the proximity switch also has a zero speed detection function, which is convenient for speed detection.

[0039] In the present embodiment, the sampling bucket 3 of the automatic sampling and dividing system is connected to the reducer 16 through the sampling tube 15. The reducer 16 is a rotary reducer, and its working principle is based on fluid dynamics, adjusting the sample flow rate and the reduction ratio to achieve accurate segmentation of the sample. The reducer 16 described in the present embodiment is used to reduce the grain transported by the sampling tube 15, and the reduction ratio of the reducer is controlled to be adjusted between 1:4 and 1:16 to adapt to the sampling requirements of different flow rates and to achieve no damage to the grain. In the present embodiment, the pipeline of the reducer 16 is sealed and dustproof, which not only prevents dust leakage, but also ensures the integrity and quality of the sample, and can be cleaned by itself and can be disassembled at any time for easy inspection and cleaning. The motor of the reducer 16 is also a dust-proof explosion-proof motor with a voltage level of 380V / 3 / 50HZ to ensure the safety of the equipment under various environmental conditions.

[0040] In this embodiment, the sample collector 17 is connected to the reducer 16 through the collection tube 18, and is used to collect the grain reduced by the reducer 16. The sampling tube and the sample transfer tube are both sealed stainless steel tanks, and their inner diameters are not less than 80mm, ensuring smooth sample transmission and avoiding material blockage.

[0041] In this embodiment, the sample collector 17 of the automatic sampling and sorting system adopts a rotary sample collector, which includes 12 sample storage tanks. Since the sample collector 17 collects samples for laboratory analysis to determine the quality of grain, the design of the sample storage tank focuses on sealing and dustproofness to ensure that the samples are not affected by the external environment during storage and maintain their original characteristics and analytical value. And the 12 sample storage tanks adopt a rotary design, and each tank body is made of HDPE (high-density polyethylene) material with good chemical stability and mechanical strength, and its volume is 10L, which can meet different sampling volume requirements. The sample collector 17 is a multi-tank automatic switching design that allows the motor-driven rotating disc to accurately send the sample into the designated sample storage tank, effectively avoiding the problem of overflowing grain or generating grain dust. The design of the disc conveyor ensures the stability and reliability of the sample collection process, and the implementation of sealing measures ensures the integrity and safety of the sample. At the same time, the sample collector 17 is fully sealed to prevent moisture loss and achieve the purpose of dustproof and moisture-proof, ensuring that the grain sample will not be contaminated during the collection and storage process.

[0042] In addition, in other embodiments, the sample collector 17 may also include a plurality of sample bottles and a sealed, dustproof cabinet for placing the sample bottles, with a suitable door of sufficient area to facilitate the removal of the sample bottles. The sample bottles are placed on a rotating disc driven by a motor, and the speed of collecting experimental samples is adjustable. The disc conveyor drives the sample bottles and delivers the samples into the sample bottles, without overflowing or generating grain dust, and the sealing is reliable.

[0043] The control system described in the present embodiment is a PLC (programmable logic controller) control system, which is the core control unit of the automatic sampling and sorting equipment, and its composition includes a CPU module, a digital input module, a digital output module, etc. The automatic control of the sampling process is realized by the design of the control system, and the efficient and safe operation of the equipment is ensured. In the control system described in the present embodiment, the CPU module is responsible for the overall control and data processing of the system, and its processing speed and response time directly affect the real-time and stability of the equipment. The digital input module is used to receive signals from various sensors, including sampling interval timing signals, sampling position signals, and equipment failure signals, etc. The input signal provides the system with necessary working status information to ensure the accuracy of the control logic.

[0044] The digital output module is responsible for issuing control instructions to each actuator, covering functions such as the start and stop of the equipment, fault alarm and status indication. The design of this module ensures the safety and reliability of the high-voltage circuit. The control system has two modes: on-site manual control and "automatic" and "semi-automatic" control to meet the needs of different work scenarios. In "automatic" mode, the system can automatically start the sampling process after the conveyor is started to achieve fully automated operation. In addition, the PLC control system in this embodiment also has good anti-interference ability, ensures the reliability of signal transmission, and adapts to complex electromagnetic interference in industrial environments. The reasonable structural design and functional configuration of the PLC control system provide strong technical support for the automatic sampling and sorting equipment, and improve the overall operating efficiency. In addition, the PLC control system in this embodiment is provided with an operation interface that interacts with the user, providing the user with an intuitive and convenient operation experience. The interface integrates various operation display functions, including the start and stop control, operating status and fault status display of the equipment, etc., to ensure that the user can monitor the working status of the equipment in real time. The interface adopts a graphical design, and the user touches the screen or presses a button to operate. The start and stop operations of all controlled devices can be performed on the interface, which simplifies the operation process and improves work efficiency. The interface is equipped with necessary current and voltage indicators to facilitate users to monitor the operating status of the equipment and ensure that the equipment operates within a safe range.

[0045] When a fault occurs, the system can promptly send an alarm signal to the user on the operation interface, and display the fault type and location, which is convenient for rapid location and processing. This function significantly improves the maintenance efficiency of the equipment and reduces downtime. The operation interface also has a multi-level authority management function to ensure that users of different levels can perform corresponding operations according to their authority, thereby improving the security and controllability of the system. The reasonable design and functional configuration of the operation interface realize the high efficiency of human-computer interaction, provide users with a good operating experience, and further improve the overall performance of the automatic sampling and sorting equipment.

[0046] In addition, the automatic sampling and sorting system described in this embodiment also includes a return device 19, which includes a return pipe. One end of the return pipe is connected to the reducer 16, which is used to discharge the excess grain reduced by the reducer 16 into the silo. Through the setting of the discharge pipe, the excess grain during sampling can be sent to the silo 2.

[0047] The method of using the automatic sampling and dividing system described in this embodiment is as follows:

[0048] First of all, the components should be assembled in accordance with the installation instructions and installation requirements, that is, ensure that each component is assembled according to the design requirements. The main parts of the equipment include the head sampler, reducer, sample collection container and control system. During installation, it is necessary to ensure that the connection between the parts is tight to avoid air leakage or powder leakage. After the installation is completed, when making electrical connections, it should be ensured that the wiring of the power supply and the control cabinet meets the electrical safety standards, and the voltage level is 380V / 3 / 50HZ. All electrical components must be strictly inspected to ensure that there is no short circuit or poor grounding. The PLC of the control system should be configured according to the technical documents to ensure that the connection of the input and output modules is accurate.

[0049] After installation, debugging is carried out. Debugging is the preliminary operation test of the system. During this process, it is necessary to check the working status of each component, including the start and stop of the motor, the cutting action of the sampler, the adjustment of the sample ratio of the divider, etc. During debugging, the noise and vibration levels of the equipment should be monitored to ensure that it operates within the specified 75dB(A) noise standard. Fault simulation tests should be carried out during debugging to verify the effectiveness of the fault alarm system and ensure that an alarm can be issued to the operator in time when a fault occurs. A comprehensive inspection and debugging of the system ensures that the equipment is in good working condition before it is put into use.

[0050] Then enter the automatic sampling and sorting process to achieve efficient and accurate sample collection and processing. The specific operation process is:

[0051] Step A: Start the conveyor, select the "Automatic" mode on the user interface, and the system starts automatically; the head sampler is in a non-working state and stays outside the grain flow;

[0052] Step B: After the conveyor is running, the head sampler is automatically controlled by the PLC control system to cut into the grain flow according to the set sampling cycle to perform full-section sampling;

[0053] Step C: the sample collected by the head sampler then enters the reducer, and the reduction ratio of the reducer is set in the range of 1:4 to 1:16; the sampler is divided in the reducer according to the preset reduction ratio;

[0054] Step D: The sample divided by the divider is transported to the sample storage tank of the sample collection container through the sample transfer tube;

[0055] Step E: After the first sample tank is collected, the PLC control system controls the sample collection container to automatically switch to the next sample storage tank to maintain continuous and efficient sample collection;

[0056] Step F: The entire operation process is monitored in real time by the PLC control system to ensure the smooth operation of each link, and timely alarm when a fault occurs to ensure the safety and reliability of the operation. During automatic sampling and sorting, the equipment's fault alarm system operates to ensure long-term stable operation of the system.

[0057] Example 2

[0058] This embodiment examines the actual performance of the automatic sampling and sorting system described in Example 1 in the grain storage and transportation process.

[0059] In this embodiment, a test platform is built under a standard laboratory environment. The tested equipment includes a complete set of automatic sampling and dividing system equipment described in Example 1, including a head sampler, a reducer, a sample collection container and a PLC control system (the present invention); in order to examine the design effects of the head sampler and the reducer, the head sampler and the reducer of the existing automatic sampling and dividing system are replaced as a control during the test of this embodiment, and different reduction ratios are set for experiments, with multiple test indicators such as the intact particle rate, damaged particle rate, moisture content, impurity content and broken particle rate of the sampling results as inspection indicators.

[0060] In this embodiment, artificially prepared soybeans with a complete grain rate of 88.0% and impurities of 1.5% are used as test samples. During the test, the sampling time and the reduction ratio are recorded, and the complete grain rate and impurity results of the sample after sampling are detected for analysis.

[0061] The experiment set up in this implementation is as follows:

[0062] Test 1: The automatic sampling and dividing system of the present invention is used, wherein the head sampler, divider, sample collection container and PLC control system are all of the structures described in Example 1, and the dividing ratio of the divider is controlled at 1:8.

[0063] Test 2: Except for the head sampler purchased from a factory in Jining, Shandong (models SDWE-ZDQYJ-Z and SDWE-ZDQYJ-T), the remaining components of the automatic sampling and dividing system, including the reducer, sample collection container and PLC control system are all the structures described in Example 1, and the reduction of the reducer is controlled at 1:8.

[0064] Test 3: Except for the reducer purchased from a factory in Jining, Shandong (the reducer is a sealed reciprocating electric reducer model WS-DFH13), the remaining components of the automatic sampling and dividing system, including the reducer, sample collection container and PLC control system are all the structures described in Example 1. The reduction ratio of the reducer can be adjusted in the range of 1:2 to 1:8. For the accuracy of comparison, the reduction ratio of this example is controlled at 1:4.

[0065] Test 4: A grain sampler (JC-LDQ-1800W) purchased from a factory in Jining, Shandong was used.

[0066] The test results are shown in Table 1.

[0067] Table 1. Test results

[0068]

[0069] The test results in Table 1 show that the complete particle rate and impurity content of the automatic sampling and dividing system of the present invention in Test 1 are 88.1% and 1.5%, which are basically consistent with the preparation data; without using the head sampler or reducer of the present invention, the detection accuracy is reduced, and the accuracy is even lower when using equipment purchased from the market. The data show that the automatic sampling and dividing system of the present invention has higher sample representativeness and detection accuracy. The test results are passed, which proves the significant advantages of the automatic sampling and dividing system of the present invention in practical applications.

[0070] Finally, it should be noted that: for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. In addition, it should be understood that although this specification is described in accordance with the implementation mode, it does not contain only one technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic sampling and dividing system, characterized in that: It includes a conveyor for conveying grain, a head sampler, a divider, a sample collector and a control system; The head sampler is located at the head end of the conveyor, and cuts and samples from the continuously flowing grain at preset time intervals under the control of a motor; The head sampler comprises a moving mechanism and a sampling bucket which is driven by the moving mechanism to move in the transverse direction of the conveyor and is connected to the reducer through a sampling tube; The divider is used to divide the collected samples to meet the needs of subsequent experiments and analysis; The divider is connected to the sample collection container via a sample transfer tube. The sample collector is used to temporarily store the grain samples after being divided by the divider; The control system is used for automatic control of the sampling process.

2. The automatic sampling and dividing system according to claim 1, characterized in that: The mobile mechanism includes a mobile bracket, on which a sampling motor, a driving sprocket, a driven sprocket and a chain installed on the driving sprocket and the driven sprocket are arranged; the sampling motor is a dust explosion-proof motor with a voltage level of 380V / 3 / 50HZ and a power reserve coefficient of not less than 1; the driving sprocket is driven to rotate by the sampling motor, and the sampling bucket is connected to the chain; the sampling bucket is located at the bottom of the mobile bracket and is connected to the chain through a suspension rod.

3. The automatic sampling and dividing system according to claim 2, characterized in that: The suspension rod is provided with a rolling support wheel, and the rolling support wheel is rollingly arranged on the mobile bracket; the mobile bracket is provided with a protective cover.

4. The automatic sampling and dividing system according to claim 1, characterized in that: A baffle is provided on the side of the head end of the conveyor. When the sampling hopper moves to the side of the head end of the conveyor, the baffle blocks the entrance of the sampling hopper, and a seal is provided between the sampling hopper and the baffle. The head sampler is a sliding cutting sampler, the cutting opening is made of 304 stainless steel material, and the width of the cutting opening is 2500mm.

5. The automatic sampling and dividing system according to claim 1, characterized in that: The moving mechanism is provided with a limit safety switch and a proximity switch for detecting the sampling bucket.

6. The automatic sampling and dividing system according to claim 1, characterized in that: The reducer is an adjustable reducer capable of adjusting the sample flow rate and the reduction ratio, and the reduction ratio adjustment range is between 1:4 and 1:16; the motor of the reducer is a dust explosion-proof motor with a voltage level of 380V / 3 / 50HZ.

7. The automatic sampling and dividing system according to claim 1, characterized in that: The sampling tube and sample transfer tube are both sealed stainless steel tanks with an inner diameter of not less than 80 mm; the sample collector is a multi-station rotary sample collector, including 12 rotary sample storage tanks, and a motor-driven disc conveyor delivers the reduced samples into designated collection tanks; all tanks are made of high-density polyethylene material, and the volume of each tank is 10L.

8. The automatic sampling and dividing system according to claim 1, characterized in that: The control system is a PLC control system, which includes two control modes: "automatic" and "semi-automatic"; The control system comprises a CPU module, a digital quantity input module and a digital quantity output module; The CPU module is responsible for the overall control and data processing of the system, and includes an operation interface for interaction with the user, and the user touches the screen or presses buttons for operation; The digital quantity input module is used to receive signals from various sensors, including sampling interval timing signals, sampling position signals and equipment fault signals; The digital output module is responsible for issuing control instructions to each actuator, including equipment start and stop, fault alarm and status indication.

9. The automatic sampling and dividing system according to claim 1, characterized in that: The automatic sampling and dividing system also includes a material return device and a fault alarm system; the material return device includes a material return pipe for discharging excess grain divided by the divider; the fault alarm system can promptly send an alarm signal to the user on the operation interface when a fault occurs, and display the fault type and location, so as to facilitate rapid positioning and processing.

10. A method for using the automatic sampling and dividing system according to any one of claims 1 to 9, characterized in that: The steps include: Step A: Start the conveyor, select "Automatic" mode on the user interface, and the system starts automatically; the head sampler is in a non-working state and stays outside the grain flow; Step B: After the conveyor is running, the head sampler is automatically controlled by the PLC control system to cut into the grain flow according to the set sampling cycle to perform full-section sampling; Step C: the sample collected by the head sampler then enters the reducer, and the reduction ratio of the reducer is set in the range of 1:4 to 1:16; the sampler is divided in the reducer according to the preset reduction ratio; Step D: The sample divided by the divider is transported to the sample storage tank of the sample collection container through the sample transfer tube; Step E: After the first tank of samples is collected, the PLC control system controls the sample collection container to automatically switch to the next sample storage tank to maintain continuous and efficient sample collection; Step F: The entire operation process is monitored in real time by the PLC control system to ensure the smooth operation of each link, and to promptly alarm when a fault occurs to ensure the safety and reliability of the operation.

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