Plant coal sampling device and sampling method thereof
The automated coal sampling device solves the problems of insufficient sample representativeness and equipment blockage in traditional sampling devices, achieving efficient and accurate sampling and classification, and adapting to diverse testing needs.
Patent Information
- Application Number
- CN202511451390.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2025-12-12
AI Technical Summary
Traditional coal sampling devices are prone to problems such as insufficient sample representativeness, incomplete sampling, human intervention introducing bias, and equipment blockage, which affect the accuracy and efficiency of the test results.
An automated coal sampling device is adopted, including components such as a storage frame, gear plate, sampling mechanism, sorting mechanism and crusher. Through dynamic feeding, sorting, crushing and automatic sampling, it ensures that each sample is fresh material, avoids blockage and achieves fully automated operation.
It improves the accuracy and efficiency of sampling results, reduces labor costs, ensures the quantity and integrity of samples, adapts to different testing needs, and reduces equipment blockage and human error.
Smart Images
Figure CN121107115A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coal sampling technology, and in particular to a coal sampling device and sampling method. Background Technology
[0002] In the production, processing and trading of coal, coal sampling is a core preliminary step to ensure the accuracy of coal quality testing and to judge the quality of coal (such as key indicators such as calorific value, ash content, and sulfur content). The representativeness of the sample directly determines the reliability of subsequent test results, which in turn affects coal pricing, combustion efficiency assessment and environmental compliance judgment.
[0003] Currently, traditional coal sampling devices and methods typically have the following shortcomings: Traditional sampling is prone to coal sample accumulation and retention, leading to repeated insertion of the sampler into the same batch of material. This results in narrow sample coverage and a single batch, failing to reflect the true characteristics of different batches of coal and thus affecting the accuracy of subsequent test results. During the sampling process, the sampling mechanism moves continuously without pause, which can easily lead to insufficient insertion depth of the sampler due to inertia, or cause spillage of the sampled material during movement. This makes it impossible to guarantee the quantity and integrity of each sample, affecting the effectiveness of the sampling. Traditional methods require manual multi-point and multiple sampling to cover different batches of coal, which not only increases manual operation costs and time costs but may also introduce subjective bias due to human intervention, further affecting sampling efficiency and objectivity. Summary of the Invention
[0004] The purpose of this invention is to solve the problem of insufficient representativeness of coal samples in the prior art, and to propose a coal sampling device and sampling method for coal plants.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coal sampling device, comprising a workbench, a protective frame fixedly installed on the workbench, a storage frame fixedly connected to the bottom of the protective frame, and a valve provided at the outlet of the storage frame; a feeding mechanism provided on the workbench; a meshing gear plate and a drive gear provided inside the protective frame; the gear plate fixedly installed on the inner wall of the protective frame; the gear plate is composed of two vertical racks symmetrically distributed on both sides of the drive gear and two toothless arc plates symmetrically arranged vertically; a second drive block fixedly installed on the side wall of the drive gear; the second drive block is connected to a sampling mechanism via a connecting component; a sorting mechanism provided on the workbench; the sorting mechanism includes a processing bucket fixedly installed on the workbench; and a transfer mechanism connected between the processing bucket and the protective frame.
[0006] Preferably, the storage frame has a feed inlet on its side wall, and the feeding mechanism includes an upper conveyor and a feeding frame mounted on the workbench, with the bottom discharge port of the feeding frame corresponding to the input end of the upper conveyor, and the feed inlet of the storage frame corresponding to the output end of the upper conveyor.
[0007] Preferably, the connecting assembly includes a rotating ring rotatably connected to the outer wall of the second driving block, the rotating ring being fixedly connected to a connecting plate, the sampling mechanism including a first driving motor fixedly installed on the top of the connecting plate, the output end of the first driving motor being fixedly connected to a first driving block meshing with the second driving block, a second sampler being fixedly installed at the bottom of the first driving block, a sampling cylinder being provided around the second sampler, a drop plate being fixedly installed at the bottom of the inner wall of the protective frame, the sampling cylinder penetrating vertically through the drop plate and being fixedly connected to the drop plate.
[0008] Preferably, the transfer mechanism includes a transfer tube, the inlet end of which is fixedly connected to the drop plate and corresponds to the outlet of the sampling cylinder, and the outlet end is fixedly connected to the top of the processing barrel. A second drive motor is fixedly installed on the outer wall of the protective frame, and a transfer rod is provided inside the transfer tube. The output end of the second drive motor is fixedly connected to the transfer rod.
[0009] Preferably, the inner wall of the processing barrel is provided with multiple sorting plates in the vertical direction, and the diameter of the sorting plates is larger than the inner diameter of the processing barrel but smaller than its outer diameter. A third drive motor is fixedly installed on the workbench, and the output end of the third drive motor is fixedly connected to the multiple sorting plates through a connecting arm. A vibrator is installed on the connecting arm.
[0010] Preferably, a crusher is fixedly installed on the workbench, the feed inlet of the crusher is connected to the discharge outlet of the storage frame, and a lower conveyor is provided on the workbench, with the crusher located directly above the lower conveyor.
[0011] Preferably, a conveying frame is provided at the output end of the lower conveyor, and a sampling frame is provided on the side of the conveying frame closer to the crusher. A transfer machine is provided on the side of the conveying frame away from the sampling frame. An arc-shaped first sampler is provided inside the sampling frame. A first motor is fixedly installed on the workbench, and the output end of the first motor is fixedly connected to the first sampler.
[0012] Preferably, a sampling mechanism is provided below the sampling frame. The sampling mechanism includes a rotating platform. The sampling port at the top of the rotating platform is connected to the discharge port of the sampling frame. Multiple sample bottles are arranged in a circular array inside the rotating platform. A second motor is fixedly installed on the top of the rotating platform. The second motor is used to drive the rotating platform to rotate.
[0013] Preferably, the middle area of the lower conveyor is set in a concave shape, and the input end of the lower conveyor is provided with a tensioning device, which is used to adjust the degree of concavity of the middle area of the lower conveyor belt.
[0014] A coal sampling method for industrial plants, using the aforementioned coal sampling device, includes the following steps: S1. Feeding and storing: Close the outlet valve of the storage frame. The coal from the plant falls into the upper conveyor through the feed frame and is transported to the storage frame for storage. S2. First sampling: Start the first drive motor to drive the sampling mechanism to move down, and the second sampler samples the coal in the storage box. The sample is discharged along the sampling cylinder. S3. Transfer and classification: The sample discharged from the sampling tube enters the transfer tube. The transfer rod rotates to transport the sample into the processing bucket. The classification plate vibrates at high frequency and classifies the coal particles according to their diameter. S4. Crushing and conveying: The tension of the lower conveyor belt is adjusted by the tensioning device to control the degree of concavity in the middle area of the conveyor belt; the valve is opened, and the coal in the storage box enters the crusher, is crushed into coal powder and falls to the lower conveyor, and is transported to the sampling box; S5. Secondary sampling: When the coal powder is transported to the bottom of the sampling frame, the first motor is started and the first sampler rotates to dig out the coal powder, which is then filled into the sample bottle below through the sampling frame. The empty sample bottle can be replaced by rotating the rotating table. S6. Residual material transfer: Coal powder that has not been sampled on the lower conveyor is transported to the transfer machine through the conveyor frame and then transferred to the next processing stage.
[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. This application ensures that the second sampler inserts fresh material each time by coordinating real-time feeding through the storage box and dynamic discharge through the valve. This eliminates the need for multiple sampling at different points, thus covering the characteristics of different batches of coal samples and improving the accuracy of subsequent test results. When the drive gear moves to the toothless arc plate at the lower end of the gear plate, it naturally stops due to the absence of rack engagement, providing sufficient time for the second sampler to penetrate the coal sample and complete the sampling. This effectively avoids problems such as insufficient sampling depth, small sample volume, or sample spillage during movement caused by the inertia of continuous movement of the mechanism, ensuring the quantity and integrity of each sample.
[0016] 2. The sampling cylinder of this application is fixedly connected to the drop plate at the bottom of the protective frame, which not only provides support for the sampling cylinder and prevents it from shifting or being damaged due to collision with the coal sample during material collection, but also guides the collected sample to be discharged stably along the sampling cylinder, preventing the sample from getting stuck in the equipment gap. The up and down movement of the second sampler in the storage frame can loosen the accumulated coal, improve the fluidity of the coal, and fundamentally reduce the problem of blockage at the outlet of the storage frame caused by long-term accumulation and caking of coal, thus ensuring the continuous and stable operation of the device.
[0017] 3. The spiral conveying structure composed of the transfer tube and the rotating transfer rod in this application effectively avoids the clogging problem that is easily caused by the traditional gravity feeding method; the classification plate, combined with the high-frequency push-pull motion and the high-frequency vibration of the vibrator, can not only prevent coal particles from getting stuck in the holes, but also forcibly push and horizontally block coal blocks through shear force, so as to achieve efficient classification of coal of different diameters and provide regular and qualified classified samples for subsequent sample processing.
[0018] 4. The concave structure in the middle of the lower conveyor in this application can naturally gather coal powder, prevent material spillage during the conveying process, and significantly improve material utilization. The tension of the conveyor belt can be adjusted by the tensioning device, which can control the degree of concavity of the conveyor belt: when the concavity is deep, the first sampler digs shallower, and the single sampling amount is suitable for the needs of small-dose parallel sample testing; when the concavity is shallow, the first sampler digs deeper, which can meet the requirements of large-dose sample testing. There is no need to change the sampling equipment or modify the equipment, so it can flexibly adapt to the sampling amount requirements of different testing scenarios.
[0019] 5. The sampling design of this application is targeted for different states of coal in the plant. It can ensure the richness of sampling by the diversity of raw coal sampling and the flexibility of coal powder sampling, and can fully meet the diverse scenarios such as classification requirements and different sampling volume requirements. It has strong overall adaptability. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall isometric structure of a coal sampling device and sampling method proposed in this invention.
[0021] Figure 2 This is a schematic diagram of the protective frame and feed frame structure of a coal sampling device and sampling method proposed in this invention.
[0022] Figure 3 This is a schematic diagram of the first drive motor and storage frame structure of a coal sampling device and sampling method proposed in this invention.
[0023] Figure 4 This is a schematic diagram of the workbench and conveyor frame structure of a coal sampling device and sampling method proposed in this invention.
[0024] Figure 5 This is a schematic diagram of the first and second motors of a coal sampling device and sampling method proposed in this invention.
[0025] Figure 6 This is a schematic diagram of the connecting arm and vibrator structure of a coal sampling device and sampling method proposed in this invention.
[0026] Figure 7 This is a schematic diagram of the half-section structure of the processing barrel of a coal sampling device and sampling method proposed in this invention.
[0027] In the diagram: 1. Workbench, 2. Lower conveyor, 3. First motor, 4. Sampling frame, 5. First sampler, 6. Tightening device, 7. Second motor, 8. Rotary table, 9. Sample bottle, 10. Conveying frame, 11. Transfer machine, 12. Feeding frame, 13. Protective frame, 14. First drive motor, 141. Second drive motor, 142. Third drive motor, 15. Storage frame, 16. Crusher, 17. Upper conveyor, 18. Connecting arm, 19. Vibrator, 20. Processing tank, 21. Sorting plate, 22. Transfer tube, 23. Transfer rod, 24. First drive block, 25. Sampling cylinder, 26. Gear plate, 27. Drive gear, 28. Drop plate. Detailed Implementation
[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0029] Reference Figures 1 to 7 A coal sampling device includes a workbench 1, a protective frame 13 fixedly installed on the workbench 1, a storage frame 15 fixedly connected to the bottom of the protective frame 13, a valve provided at the outlet of the storage frame 15, an inlet provided on the side wall of the storage frame 15, and a feeding mechanism provided at the top of the workbench 1. The feeding mechanism includes an upper conveyor 17 and an inlet frame 12 installed on the workbench 1, with the bottom outlet of the inlet frame 12 corresponding to the input end of the upper conveyor 17, and the inlet of the storage frame 15 corresponding to the output end of the upper conveyor 17. Coal falls from the inlet frame 12 into the upper conveyor 17, is conveyed into the storage frame 15, the valve is closed, and the coal begins to accumulate in the storage frame 15.
[0030] The protective frame 13 has a meshing gear plate 26 and a drive gear 27 inside. The gear plate 26 is fixed to the inner wall of the protective frame 13. Its structure consists of two vertical racks symmetrically distributed on both sides of the drive gear 27 and two toothless arc plates arranged symmetrically up and down. A second drive block is fixed to the side wall of the drive gear 27. A rotating ring is rotatably connected to the outer wall of the second drive block. A connecting plate is fixedly connected to the rotating ring. A sampling mechanism is provided on the connecting plate. The sampling mechanism includes a first drive motor 14 fixedly installed on the top of the connecting plate. The output end of the first drive motor 14 is fixedly connected to a first drive block 24 that meshes with the second drive block. A second sampler is fixedly installed at the bottom of the first drive block 24. A sampling cylinder 25 is provided around the second sampler. A drop plate 28 is fixedly installed at the bottom of the inner wall of the protective frame 13. The sampling cylinder 25 penetrates the drop plate 28 vertically and is fixedly connected to the drop plate 28.
[0031] During operation, the first drive motor 14 drives the first drive block 24, which in turn drives the second drive block and the drive gear 27 to rotate. Under the action of the rack on one side of the gear plate 26, the drive gear 27 drives the sampling mechanism to move downward through the rotating ring and the connecting plate, so that the second sampler is inserted into the coal in the storage frame 15 to take a sample. The coal moves upward along the inner wall of the sampling cylinder 25 and is discharged from its outlet. When the drive gear 27 moves to the lowest toothless arc plate, it stops because the lower end of the gear plate 26 is toothless, ensuring that the second sampler can successfully complete the sampling after reaching the bottom. After the pause, the drive gear 27 meshes with the rack on the other side, and then drives the sampling mechanism to move upward, completing the entire sampling process. The toothless design at the lower end of the gear plate 26 allows the drive gear 27 to stop naturally when it reaches the bottom, providing sufficient time for the second sampler to complete the sampling action and avoiding insufficient sampling or sample spillage due to inertia during movement. The fixed structure of the sampling cylinder 25 and the drop plate 28 not only guides the material to be discharged smoothly but also protects the second sampler from external collisions. The entire sampling process requires no manual intervention, realizing fully automatic operation from downward sampling to upward reset, reducing labor costs, and avoiding interference from human factors on the sampling results. When the sampler finishes sampling and rises, open the discharge valve of the storage frame 15 to ensure that the feeding and discharging speeds of the storage frame 15 remain basically consistent. There is always a new batch of coal inside the storage frame 15 that can be sampled, so that each time the second sampler is inserted into the stockpiled coal, it is a new batch of coal. This ensures the diversity of sampling without the need for multi-point sampling, thus improving sampling efficiency. Furthermore, the up-and-down movement of the second sampler within the storage frame 15 helps to improve the flowability of the coal and avoids potential blockages within the storage frame 15.
[0032] A sorting mechanism is provided on the workbench 1. The sorting mechanism includes a processing tank 20 fixedly installed on the workbench 1. Multiple sorting plates 21 are arranged vertically on the inner wall of the processing tank 20. The diameter of the sorting plates 21 is larger than the inner diameter of the processing tank 20 but smaller than its outer diameter. The diameter of the sieve holes of the multiple sorting plates 21 is different, and the diameter of the sieve holes becomes smaller as they go down. A third drive motor 142 is fixedly installed on the workbench 1. The output end of the third drive motor 142 is fixedly connected to the multiple sorting plates 21 through a connecting arm 18. A vibrator 19 is installed on the connecting arm 18. A transfer mechanism is connected between the processing tank 20 and the protective frame 13. The transfer mechanism includes a transfer tube 22. The feed end of the transfer tube 22 is fixedly connected to the drop plate 28 and corresponds to the discharge port of the sampling cylinder 25. The discharge end is fixedly connected to the top of the processing tank 20. A second drive motor 141 is fixedly installed on the outer wall of the protective frame 13. A transfer rod 23 is fixedly connected to the output end of the second drive motor 141 and is located inside the transfer tube 22. The coal discharged from the sampling cylinder 25 enters the transfer pipe 22. The second drive motor 141 drives the transfer rod 23 to rotate, transporting the coal in the pipe to the processing tank 20. The transfer pipe 22 and the rotating transfer rod 23 form a spiral conveying structure, which can quickly and stably transport the sampled coal to the processing tank 20, avoiding the clogging problem that may occur with traditional gravity feeding. After the coal enters the processing tank 20, the third drive motor 142 drives the connecting arm 18 to drive multiple sorting plates 21 to perform high-frequency back-and-forth motion. At the same time, the vibrator 19 works, causing the sorting plates 21 to vibrate while being pushed and pulled back and forth, thus sorting coal of different diameters. The stepped design of the multi-layer sorting plate 21 enables the grading and screening of coal particles of different diameters. The combined action mode of high-frequency push-pull and vibration can both make the coal particles bounce through vibration to prevent pore blockage and break up coal block jams through horizontal shearing force, which greatly improves the sorting efficiency and accuracy. The diameter of the sorting plate 21 is between the inner and outer diameters of the processing tank 20, which ensures that the coal particles have enough space for screening and avoids material overflow. This allows the entire sorting mechanism to operate efficiently in a limited space and forms a compact assembly line processing flow with the transfer mechanism. By opening the processing tank 20, the coal samples that have been sorted by size but have not yet been further processed can be taken out as needed. This allows operators to take out sorted coal samples at any time, which not only meets the needs of immediate testing but also retains the flexibility for subsequent further processing.
[0033] A crusher 16 is fixedly installed on the workbench 1. The feed inlet of the crusher 16 is connected to the discharge outlet of the storage frame 15. The valve at the discharge outlet of the storage frame 15 can control the speed at which the coal falls into the crusher 16. A lower conveyor 2 is provided on the workbench 1, and the crusher 16 is located directly above the lower conveyor 2. A conveyor frame 10 is provided at the output end of the lower conveyor 2. A sampling frame 4 is provided on the side of the conveyor frame 10 closest to the crusher 16, and a transfer machine 11 is provided on the side of the conveyor frame 10 away from the sampling frame 4. An arc-shaped first sampler 5 is provided inside the sampling frame 4. A first motor 3 is fixedly installed on the workbench 1. The output end of the first motor 3 is fixedly connected to the first sampler 5. A sampling mechanism is provided below the sampling frame 4. The sampling mechanism includes a rotating table 8. The sampling port at the top of the rotating table 8 is connected to the discharge port of the sampling frame 4. Multiple sample bottles 9 are arranged in a circular array inside the rotating table 8. A second motor 7 is fixedly installed on the top of the rotating table 8 to drive the rotating table 8 to rotate (this is prior art and will not be described in detail). After being crushed into coal powder by crusher 16, the coal falls into the lower conveyor 2. Crusher 16 is directly connected to the discharge port of storage frame 15, and the valve of storage frame 15 can control the feeding speed. The feeding amount can be flexibly adjusted according to the processing capacity of crusher 16 to avoid overloading and blockage of crusher 16 due to excessive feeding speed, or idle waste of equipment due to excessive feeding speed. When the coal is conveyed to the bottom of sampling frame 4, the first motor 3 drives the first sampler 5 to rotate, digging out the coal powder and filling it into the sample bottle 9 below through sampling frame 4. Compared with manual sampling, coal powder can be dug out at a fixed frequency and angle to ensure that each sampling is accurate and efficient. The sample volume is uniform and the sampling position is consistent, avoiding sample deviation caused by human operation. After a sample bottle 9 is filled, the second motor 7 drives the rotary table 8 to rotate once, so that the empty sample bottle 9 is aligned with the bottom of the sampling frame 4 for the next sampling. This realizes continuous automated operation of "sampling-bottle changing", eliminating the need for frequent manual replacement of sample bottles 9 and greatly improving sampling efficiency. The sampled coal powder enters the sample bottle 9 for testing, while the unsampled coal powder is directly transported to the transfer machine 11 through the conveyor frame 10 to enter the next processing stage. The two do not interfere with each other, avoiding the overall process from being stopped due to sampling.
[0034] The middle area of the lower conveyor 2 is designed to be concave to support the crushed coal powder. The input end of the lower conveyor 2 is equipped with a tensioning device 6 (this is an existing device and will not be described further). The tensioning device 6 allows adjustment of the tension of the conveyor belt of the lower conveyor 2, thereby controlling the degree of concavity in the middle area of the conveyor belt. Under the premise of ensuring normal transportation, the degree of concavity directly determines the single sampling volume: the deeper the concavity, the lower the "bottom position" of the coal powder accumulation in the middle area of the conveyor belt, and the shallower the contact depth between the digging trajectory of the first sampler 5 and the coal powder surface when it rotates, resulting in a smaller single sampling volume; conversely, the shallower the concavity, the higher the coal powder accumulation position, and the deeper the digging depth of the first sampler 5, resulting in a larger single sampling volume. By adjusting the conveyor belt tension through the tensioning device 6, the degree of concavity can be precisely controlled, thereby flexibly adjusting the single sampling volume. This satisfies both small-dose parallel sample testing (such as trace component analysis) and large-dose sample requirements (such as industrial-grade component testing), without requiring replacement of sampling equipment or equipment modification, significantly improving sampling flexibility. The concave structure in the middle can naturally gather coal powder and prevent coal powder from spilling due to the tilting or vibration of the conveyor belt during the conveying process; at the same time, the tensioning device 6 can adjust the tension according to the humidity and particle size of the coal powder to ensure that the conveyor belt always remains in a concave state without jamming or spilling material, thus taking into account both conveying efficiency and material utilization.
[0035] A method for sampling coal in a plant, using the aforementioned coal sampling device, includes the following steps: S1. Feeding and storing materials: Close the outlet valve of the storage frame 15. The coal from the plant falls into the upper conveyor 17 through the feed frame 12 and is transported to the storage frame 15 for storage. S2. First sampling: Start the first drive motor 14 to drive the sampling mechanism to move down, and the second sampler samples the coal in the storage box 15. The sample is discharged along the sampling cylinder 25. S3. Transfer and classification: The sample discharged from the sampling tube 25 enters the transfer tube 22. The transfer rod 23 rotates to transport the sample to the processing bucket 20. The classification plate 21 vibrates at high frequency to classify the coal particles according to their diameter. S4. Crushing and conveying: The tension of the conveyor belt of the lower conveyor 2 is adjusted by the tensioning device 6 to control the degree of indentation of the conveyor belt; the valve is opened and the coal in the storage box 15 enters the crusher 16, is crushed into coal powder and falls to the lower conveyor 2, and is transported to the sampling box 4. S5. Secondary sampling: When the coal powder is transported to the bottom of the sampling frame 4, the first motor 3 is started and the first sampler 5 rotates to dig out the coal powder, which is then filled into the sample bottle 9 below through the sampling frame 4. The empty bottle can be replaced by rotating the rotating table 8. S6. Residual material transfer: The coal powder that has not been sampled on the lower conveyor 2 is transported to the transfer machine 11 through the conveyor frame 10, and then transferred to the next processing stage by the transfer machine 11.
[0036] When in use, the coal falls from the feed frame 12 onto the upper conveyor 17 and is transported to the storage frame 15. The bottom valve of the storage frame 15 is closed, and the coal accumulates to a certain extent inside the storage frame 15. The first drive motor 14 is started, and the first drive block 24 drives the second drive block and drive gear 27 to rotate. When the drive gear 27 moves down, the sampling mechanism also moves down. The second sampler is inserted into the coal piled up in the storage box 15 for sampling. The drive gear 27 stops when it moves down to the lower arc area of the gear plate 26 to ensure smooth sampling. After sampling, the sampling mechanism moves up synchronously with the drive gear 27. The sample passes through the sampling tube 25 and enters the transfer tube 22. The second drive motor 141 is started, and the transfer rod 23 in the transfer tube 22 rotates to transfer the sample into the processing bucket 20. The third drive motor 142 is started, and the sorting plate 21 is driven by the connecting arm 18 to perform high-frequency back-and-forth pushing and pulling motion. With the help of the vibrator 19, the sorting plate 21 vibrates while performing back-and-forth pushing and pulling motion to classify samples of different diameters. The processing bucket 20 can be opened to take out the required sample as needed.
[0037] When the second sampler finishes its first sampling and rises, the discharge valve of the storage frame 15 is opened. The coal enters the crusher 16, is crushed into coal powder, and falls onto the lower conveyor 2. It is transported on the recessed conveyor belt. When it passes under the sampling frame 4, the first motor 3 drives the first sampler 5 to rotate and dig out the coal powder, which is then filled into the sample bottle 9 through the sampling frame 4. After sampling of one sample bottle 9, the rotary table 8 rotates once under the action of the second motor 7, aligning the empty sample bottle 9 with the discharge port of the sampling frame 4 for the next sampling. The coal that is not sampled is transported to the transfer machine 11 through the conveyor frame 10 and transferred to the next processing stage. The tension of the conveyor belt of the lower conveyor 2 is adjusted by the tensioning device 6 to control the degree of recess of the conveyor belt, thereby adjusting the amount of coal powder put into the sample bottle 9 each time: the shallower the recess, the deeper the first sampler 5 digs, and the more coal powder is sampled in a single time; the deeper the recess, the shallower the first sampler 5 digs, and the less coal powder is sampled in a single time.
[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A coal sampling device, comprising a workbench (1), characterized in that, A protective frame (13) is fixedly installed on the workbench (1). A storage frame (15) is fixedly connected to the bottom of the protective frame (13), and a valve is provided at the outlet of the storage frame (15). A feeding mechanism is provided on the workbench (1). A gear plate (26) and a drive gear (27) mesh with each other are provided inside the protective frame (13). The gear plate (26) is fixedly installed on the inner wall of the protective frame (13). The gear plate (26) consists of two vertical racks symmetrically distributed on both sides of the drive gear (27) and two toothless arc plates symmetrically arranged vertically. A second drive block is fixedly installed on the side wall of the drive gear (27). The second drive block is connected to a sampling mechanism through a connecting component. A classification mechanism is provided on the workbench (1). The classification mechanism includes a processing bucket (20) fixedly installed on the workbench (1). A transfer mechanism is connected between the processing bucket (20) and the protective frame (13).
2. The coal sampling device according to claim 1, characterized in that, The storage box (15) has a feed inlet on its side wall. The feeding mechanism includes an upper conveyor (17) and a feed box (12) set on the workbench (1). The bottom outlet of the feed box (12) corresponds to the input end of the upper conveyor (17), and the feed inlet of the storage box (15) corresponds to the output end of the upper conveyor (17).
3. The coal sampling device according to claim 2, characterized in that, The connecting assembly includes a rotating ring rotatably connected to the outer wall of the second drive block. The rotating ring is fixedly connected to a connecting plate. The sampling mechanism includes a first drive motor (14) fixedly installed on the top of the connecting plate. The output end of the first drive motor (14) is fixedly connected to a first drive block (24) that meshes with the second drive block. A second sampler is fixedly installed at the bottom of the first drive block (24). A sampling cylinder (25) is provided around the second sampler. A drop plate (28) is fixedly installed at the bottom of the inner wall of the protective frame (13). The sampling cylinder (25) vertically penetrates the drop plate (28) and is fixedly connected to the drop plate (28).
4. The coal sampling device according to claim 3, characterized in that, The transfer mechanism includes a transfer tube (22), the feed end of the transfer tube (22) is fixedly connected to the drop plate (28) and corresponds to the discharge port of the sampling cylinder (25), and the discharge end is fixedly connected to the top of the processing barrel (20). A second drive motor (141) is fixedly installed on the outer wall of the protective frame (13). A transfer rod (23) is provided inside the transfer tube (22), and the output end of the second drive motor (141) is fixedly connected to the transfer rod (23).
5. The coal sampling device according to claim 4, characterized in that, The inner wall of the processing barrel (20) is provided with multiple sorting plates (21) in the vertical direction. The diameter of the sorting plates (21) is larger than the inner diameter of the processing barrel (20) and smaller than its outer diameter. A third drive motor (142) is fixedly installed on the workbench (1). The output end of the third drive motor (142) is fixedly connected to the multiple sorting plates (21) through the connecting arm (18). A vibrator (19) is installed on the connecting arm (18).
6. The coal sampling device according to claim 5, characterized in that, A crusher (16) is fixedly installed on the workbench (1). The feed inlet of the crusher (16) is connected to the discharge outlet of the storage frame (15). A lower conveyor (2) is provided on the workbench (1), and the crusher (16) is located directly above the lower conveyor (2).
7. The coal sampling device according to claim 6, characterized in that, The output end of the lower conveyor (2) is provided with a conveying frame (10), and a sampling frame (4) is provided on the side of the conveying frame (10) close to the crusher (16). A transfer machine (11) is provided on the side of the conveying frame (10) away from the sampling frame (4). An arc-shaped first sampler (5) is provided inside the sampling frame (4). A first motor (3) is fixedly installed on the workbench (1), and the output end of the first motor (3) is fixedly connected to the first sampler (5).
8. The coal sampling device according to claim 7, characterized in that, A sampling mechanism is provided below the sampling frame (4). The sampling mechanism includes a rotating platform (8). The sampling port at the top of the rotating platform (8) is connected to the discharge port of the sampling frame (4). Multiple sample bottles (9) are arranged in a circular array inside the rotating platform (8). A second motor (7) is fixedly installed on the top of the rotating platform (8). The second motor (7) is used to drive the rotating platform (8) to rotate.
9. The coal sampling device according to claim 8, characterized in that, The middle area of the lower conveyor (2) is set in a concave shape, and the input end of the lower conveyor (2) is provided with a tensioning device (6). The tensioning device (6) is used to adjust the degree of concavity in the middle area of the conveyor belt of the lower conveyor (2).
10. A method for sampling coal from a plant, characterized in that, The application of the coal sampling device according to claim 9 includes the following steps: S1. Loading and storing materials: Close the outlet valve of the storage box (15). The coal from the plant falls into the upper conveyor (17) through the feed box (12) and is transported to the storage box (15) for storage. S2. First sampling: Start the first drive motor (14) to drive the sampling mechanism to move down, and the second sampler samples the coal in the storage box (15). The sample is discharged along the sampling cylinder (25). S3. Transfer and classification: The sample discharged from the sampling tube (25) enters the transfer tube (22). The transfer rod (23) rotates to transport the sample into the processing bucket (20). The classification plate (21) vibrates at high frequency and is classified according to the diameter of the coal particles. S4. Crushing and conveying: Adjust the tension of the conveyor belt of the lower conveyor (2) through the tensioning device (6) to control the degree of indentation in the middle area of the conveyor belt; open the valve, and the coal in the storage box (15) enters the crusher (16), is crushed into coal powder and falls to the lower conveyor (2), and is transported to the sampling box (4). S5. Secondary sampling: When the coal powder is transported to the bottom of the sampling frame (4), the first motor (3) is started and the first sampler (5) rotates to dig out the coal powder, and then fills it into the sample bottle (9) below through the sampling frame (4). The rotating table (8) can be rotated to replace the empty sample bottle (9). S6. Residual material transfer: The coal powder that has not been sampled on the lower conveyor (2) is transported to the transfer machine (11) through the conveyor frame (10) and transferred to the next processing stage by the transfer machine (11).