Coal quality on-line detection multispectral analysis system and analysis method

Abstract

The invention discloses a coal quality online detection multispectral analysis system and analysis method, and belongs to the technical field of coal quality detection. Comprising a detection table, a crushing barrel, a supporting frame, a spectrum detector and a conveying belt are installed at the top end of the detection table, the conveying belt is driven by a second motor, and a flattening assembly, a collecting guide plate, a collecting box and a smoothing assembly are arranged at the top of the conveying belt. Through cooperation of the crushing cylinder and the flattening assembly, coal samples can be conveyed to the conveying belt after being crushed, the coal samples are automatically flattened and concentrated so that the coal samples can be conveyed into a spectrum detector to be subjected to spectrum analysis through a laser head, automatic operation is achieved in the whole process, rapidness and convenience are achieved, the detection efficiency is high, manual participation is not needed, and the labor intensity of workers is reduced. Meanwhile, through cooperation of the collecting box, the collecting guide plate and the smoothing assembly, the detected coal samples can be collected and stored in a targeted mode, and waste of coal resources is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of coal quality detection, and specifically to an online coal quality detection multispectral analysis system and an analysis method. Background Art

[0002] As an important energy supply, coal is widely used in the industrial field, such as thermal power, construction, and chemical industry. Coal quality detection is a key link before coal is used. Existing technologies for analyzing coal quality include chemical analysis, physical testing, and spectral analysis. Among them, spectral analysis technology mainly obtains characteristic data of samples through spectral signals to achieve rapid analysis of coal quality components, structures, and properties, and has the advantages of rapidity, non-destructiveness, multi-element analysis, high sensitivity, and real-time monitoring.

[0003] The existing technologies have the following defects: First, in practical applications of spectral analysis, due to the large amount of data generated, and in the process of coal mine production, real-time monitoring and adjustment of production process parameters are required. Traditional coal quality real-time detection systems cannot meet the requirements of real-time processing and analysis, and cannot monitor and adjust production process parameters in real time, with a low degree of intelligence. Second, for existing coal-fired units, coal quality online detection equipment has been installed. However, if one wants to monitor the actual coal types entering the furnace of each mill in real time through these devices, equipment needs to be installed in the pulverized coal pipeline entering the furnace of each mill, which requires a huge investment, is difficult to maintain, and cannot meet the real-time combustion adjustment and optimized operation of the boiler. To overcome the first defect, a coal quality real-time detection system based on spectral analysis with the application number 2024109234732 adds a real-time data processing and analysis module, enabling the system to perform real-time spectral analysis and monitoring of coal quality samples, and adding an intelligent feedback control module to adjust production process parameters according to the monitoring results, thereby improving the real-time performance and accuracy of the production process and the intelligence in the production process, and solving the first defect mentioned above. To overcome the second defect, an in-furnace coal quality real-time online monitoring system with the application number 2019224528614 detects ash content, calorific value, moisture content, sulfur content, and volatile content online, and dynamically monitors the stratification situation of the coal bunker under various coal types, enabling operators to master the changes in in-furnace coal quality in real time, guiding coal blending and combustion adjustment, and improving the automatic operation and visualization level of the unit, and saving energy and reducing consumption for the unit, solving the second defect mentioned above. Although the above existing technologies can overcome the above defects, when analyzing the coal quality of the mined coal at present, before sending the coal sample into the spectral analyzer for inspection, it is necessary to manually take out the crushed coal sample and press it before it can be sent into the spectral analyzer. The requirement for manual participation in loading and unloading is high, the operation is troublesome, and there are certain safety risks. At the same time, after the detection is completed, there are no measures for collecting and storing the detected coal samples, resulting in waste of coal resources.

[0004] In view of the above problems, it is urgent to innovate and design on the basis of the original equipment. Therefore, we propose a multi-spectral analysis system and analysis method for on-line coal quality detection, which can well solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-spectral analysis system and analysis method for on-line coal quality detection, so as to solve the problems proposed in the above background technology. When analyzing the coal quality of the mined coal at present, before sending the coal sample into the spectral analyzer for inspection, it is necessary to manually take out the crushed coal sample and press it before it can be sent into the spectral analyzer. The requirement for manual participation in loading and unloading is high, the operation is troublesome, and there are certain safety risks. At the same time, after the detection is completed, there is no measure to collect and store the coal sample after the detection is completed, resulting in waste of coal resources.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A multi-spectral analysis system for on-line coal quality detection, including: a detection table, on the top of the detection table, a crushing cylinder, a support frame and a spectral detector are installed in sequence from left to right. A conveyor belt is arranged inside the support frame, and the conveyor belt passes through the inside of the spectral detector. A laser head is installed inside the spectral detector; the conveyor belt is driven by a second motor fixedly installed on the outer wall of one end of the support frame and the cooperation of the transmission rollers on both sides. A flattening assembly is arranged on the top of the conveyor belt on the left side of the spectral detector. The flattening assembly includes a mounting frame fixedly installed on the top of the support frame, and a flattening roller is rotatably connected inside the mounting frame. Transmission wheels are fixedly installed on the output shaft of the second motor and the outer side of the shaft rod of the flattening roller, and a transmission belt is commonly driven on the outer sides of the two transmission wheels. Concentrating plates are fixedly connected between the inner walls at both ends of the mounting frame between the flattening roller and the spectral detector, and the two concentrating plates are narrowed from left to right; a collection guide plate is fixedly installed below the right side of the conveyor belt on the top of the detection table, and a collection box is placed below the tail of the collection guide plate to specifically collect and store the coal sample after the detection is completed to avoid waste of coal resources.

[0007] Preferably, a feeding hopper and a discharge guide plate are respectively fixedly installed at the top and the right bottom of the crushing cylinder, and the tail of the discharge guide plate is located above the left side of the conveyor belt. A first motor is fixedly installed on the outer wall of one end of the crushing cylinder. The output shaft of the first motor penetrates into the inside of the crushing cylinder and is fixedly connected with a crushing roller, and a plurality of crushing cutters are uniformly installed on the outer wall of the crushing roller.

[0008] Preferably, the crushing cylinder is installed on the top of the detection table through a buffer telescopic rod that can slide relatively, and a damping spring is fixedly installed between the two rod bodies of the buffer telescopic rod.

[0009] Preferably, a filter is detachably mounted on the inner side of the top of the discharge guide plate via four bolt connectors, the filter being used to screen the crushed coal samples, and the screw parts of the four bolt connectors are respectively fixedly connected to the outer wall of the crushing barrel and the inner wall of the discharge guide plate located on the left side of the filter.

[0010] Preferably, a cleaning brush is fixedly connected to the top end of the collecting guide plate, and the top end of the cleaning brush is in close contact with the right bottom end of the conveyor belt.

[0011] Preferably, a smoothing mechanism is provided inside the collecting box, and the smoothing mechanism includes a moving rod rotatably connected to the inner side of the collecting box, and the outer side of the moving rod is rotatably connected to a smoothing roller, a third motor is fixedly installed on the right side wall of the detection table, and the output shaft of the third motor is fixedly connected to a threaded rod, the outer side of the threaded rod is threadedly connected to a moving ring, and one end of the moving ring is fixedly connected to a sleeve, the sleeve is limitably connected to the moving rod, and a sensor is embedded in the bottom end of the smoothing roller.

[0012] Preferably, an electromagnet is fixedly mounted on the inner end wall of the sleeve, and a connecting magnet is slidably connected to the opening of the sleeve, and the connecting magnet is inserted into one end of the moving rod, and a return spring is fixedly connected between the connecting magnet and the inner end wall of the sleeve.

[0013] Preferably, the top end of the detection platform is slidably connected to a limit plate on the right side of the collection box, and a plurality of limit springs are fixedly connected between the limit plate and the detection platform, and the top end of the limit plate fixedly abuts the collection box.

[0014] The present invention also discloses a method for using the multi-spectral analysis system for online detection of coal quality, namely, a multi-spectral analysis method for online detection of coal quality. The specific method steps are as follows: S1. Put the large coal sample from the feed hopper into the crushing drum, and the first motor drives the crushing roller and the crushing knife to rotate to crush the coal block. After crushing, the coal is discharged from the discharge guide plate through the filter screen and slides onto the conveyor belt for transportation; S2, the flattening roller is driven to rotate by the cooperation of the second motor, the transmission wheel and the transmission belt to flatten the coal sample on the conveyor belt, and then the coal sample is concentrated by the concentration plate so as to be sent to the spectrum detector for spectrum analysis; S3. The coal sample enters the spectrometer, and the laser head emits near-infrared and X-ray fluorescence, integrating the rapid detection technology of the spectral analysis system to achieve accurate identification of coal quality components. After the detection is completed, the coal sample is collected into the collection box through the collection guide plate; S4. The third motor drives the threaded rod to rotate and drives the movable sleeve ring to move, and then drives the sleeve, the movable rod and the smoothing roller to move in sequence to smooth the coal sample and notify the staff to take out the full collection box.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of the crushing cylinder and the flattening assembly, the coal sample can be sent to the conveyor belt after being crushed, and the coal sample can be automatically flattened and concentrated, so as to be conveniently sent into the spectral detector for spectral analysis through the laser head. The whole process is automated, which is not only fast and convenient, resulting in high detection efficiency, but also does not require manual participation, effectively improving the safety factor. At the same time, through the cooperation of the collection box, the collection guide plate and the smoothing assembly, the detected coal sample can be collected and stored specifically to avoid waste of coal resources. The specific content is as follows: 1. Put the large coal sample into the crushing cylinder from the feed hopper, and drive the crushing roller and the crushing machete to rotate through the first motor to crush the input coal block. When the coal sample is crushed into small pieces convenient for spectral analysis, it can be discharged from the discharge guide plate through the filter screen and slide onto the conveyor belt for transportation.

[0016] 2. By setting the flattening assembly, when the second motor drives the conveyor belt to convey, the flattening roller is driven to rotate synchronously through the cooperation of the transmission wheel and the transmission belt. In this way, the flattening roller can flatten the coal sample on the conveyor belt, and the flattened coal sample continues to be concentrated on the conveyor belt between the concentration plates, so as to be conveniently sent into the spectral detector for spectral analysis.

[0017] 3. The coal sample continues to be conveyed into the spectral detector. The laser head emits near-infrared and X-ray fluorescence, and combines with the fast detection technology of the spectral detector system to establish an accurate mapping between the combined spectrum and the coal quality chemical components, realizing rapid and accurate identification of the coal quality components. After the detection is completed, it is collected into the collection box through the collection guide plate. The whole process is automated, which is not only fast and convenient, resulting in high detection efficiency, but also does not require manual participation, effectively improving the safety factor.

[0018] 4. By setting the smoothing assembly, when the coal sample accumulates in the collection box and touches the sensor, a signal can be sent to the central control system to start the third motor. The third motor drives the threaded rod to rotate and drives the moving collar to move. The moving collar continues to drive the sleeve, the moving rod, and the smoothing roller to move in turn. In this way, the coal sample in the collection box can be smoothed, and the staff is notified to take out the full collection box to avoid waste of coal resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the sectional structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the sectional structure of the crushing cylinder of the present invention.

[0022] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of the B part in.

[0023] Figure 5 This is a schematic structural diagram of the flattening component of the present invention.

[0024] Figure 6 For the present invention Figure 2 An enlarged structural diagram of part A in the present invention.

[0025] Figure 7 This is a schematic sectional view of the detection table and the collection box of the present invention.

[0026] Figure 8 This is a schematic sectional view of the sleeve and the moving rod of the present invention.

[0027] In the figure: 1, detection table; 2, crushing cylinder; 3, support frame; 4, conveyor belt; 5, spectral detector; 6, laser head; 7, collection box; 8, feed hopper; 9, discharge guide plate; 10, first motor; 11, crushing roller; 12, crushing cutter; 13, buffer telescopic rod; 14, damping spring; 15, filter screen; 16, bolt connection; 17, second motor; 18, mounting frame; 19, flattening roller; 20, transmission wheel; 21, transmission belt; 22, concentrating plate; 23, collection guide plate; 24, cleaning brush; 25, moving rod; 26, smoothing roller; 27, third motor; 28, threaded rod; 29, moving collar; 30, sleeve; 31, electromagnet; 32, connecting magnet; 33, pulling-back spring; 34, limiting plate; 35, limiting spring; 36, inductor. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention provides the following technical solutions for a multi-spectral analysis system for on-line coal quality detection.

[0030] Embodiment 1: Please refer to Figures 1 - 5As shown in the figure, when analyzing the quality of the mined coal at present, before sending the coal sample into the spectral analyzer for inspection, it is necessary to manually take out the crushed coal sample and press it together before it can be sent into the spectral analyzer. The requirement for manual participation in loading and unloading is high, the operation is troublesome, and there are certain safety risks. To solve this technical problem, the following technical content is disclosed in this embodiment: It includes a detection table 1. A crushing cylinder 2, a support frame 3, and a spectral detector 5 are sequentially installed on the top of the detection table 1 from left to right. A conveyor belt 4 is arranged inside the support frame 3, and the conveyor belt 4 passes through the inside of the spectral detector 5. A laser head 6 is installed inside the spectral detector 5. Among them, the crushing cylinder 2 is installed on the top of the detection table 1 through a buffer telescopic rod 13 that can slide relatively, and a damping spring 14 is fixedly installed between the two rod bodies of the buffer telescopic rod 13. Through the elastic effect of the damping spring 14, the shock force generated when the coal block is crushed inside the crushing cylinder 2 can be effectively buffered, thereby enhancing the safety level of the device during use.

[0031] A feed hopper 8 and a discharge guide plate 9 are respectively fixedly installed at the top and the right bottom of the crushing cylinder 2, and the tail of the discharge guide plate 9 is located above the left side of the conveyor belt 4. A first motor 10 is fixedly installed on the outer wall of one end of the crushing cylinder 2. The output shaft of the first motor 10 penetrates into the inside of the crushing cylinder 2 and is fixedly connected with a crushing roller 11. A plurality of crushing cutters 12 are evenly installed on the outer wall of the crushing roller 11. The structure of the crushing cutters 12 can quickly crush the coal blocks input from the feed hopper 8. In addition, a filter screen 15 is detachably installed on the inner side of the top of the discharge guide plate 9 through four bolt connectors 16. The filter screen 15 is used for screening the crushed coal sample, and the screw parts of the four bolt connectors 16 are respectively fixedly connected to the outer wall of the crushing cylinder 2 and the inner wall of the discharge guide plate 9 on the left side of the filter screen 15, so as to facilitate the disassembly and replacement of the filter screen 15. The conveyor belt 4 is driven by a second motor 17 fixedly installed on the outer wall of one end of the support frame 3 and the cooperation of the transmission rollers on both sides. A flattening assembly is arranged on the top of the conveyor belt 4 on the left side of the spectral detector 5. The flattening assembly includes a mounting frame 18 fixedly installed on the top of the support frame 3. A flattening roller 19 is rotatably connected inside the mounting frame 18. Transmission wheels 20 are fixedly installed on the output shaft of the second motor 17 and the outer side of the shaft rod of the flattening roller 19, and a transmission belt 21 is commonly driven on the outer sides of the two transmission wheels 20. Concentrating plates 22 are fixedly connected between the inner walls of the two ends of the mounting frame 18 between the flattening roller 19 and the spectral detector 5, and the two concentrating plates 22 narrow from left to right.

[0032] When in use, a large coal sample is put into the crushing drum 2 from the feed hopper 8, and the first motor 10 drives the crushing roller 11 and the crushing knife 12 to rotate to crush the coal block. When the coal sample is crushed into a small size convenient for spectral analysis, it can be discharged from the discharge guide plate 9 through the filter screen 15 and slide onto the conveyor belt 4 for transportation; when the second motor 17 drives the conveyor belt 4 for transportation, the flattening roller 19 is driven to rotate synchronously through the cooperation of the transmission wheel 20 and the transmission belt 21, so that the flattening roller 19 can flatten the coal sample on the conveyor belt 4, and the flattened coal sample continues to pass through the conveyor belt 4. The coal samples are concentrated on the conveyor belt 4 through the concentrating plates 22, so as to be sent to the spectrometer 5 for spectral analysis. The coal samples are further conveyed to the inside of the spectrometer 5, and the laser head 6 emits near-infrared and X-ray fluorescence, and integrates the rapid detection technology of the spectrometer 5 system to establish a precise mapping between the fused spectrum and the chemical composition of the coal quality, so as to realize rapid and accurate identification of the coal quality components. After the detection is completed, the coal samples are collected into the collection box 7 through the collection guide plate 23. The whole process is automated, which is not only fast and convenient, but also has high detection efficiency, and does not require human intervention, so the safety factor can be effectively improved.

[0033] Embodiment 2: The technical content disclosed in this embodiment is a further improvement made on the basis of the above embodiment 1. Figures 6 - 8 As shown, after the detection is completed, the existing device does not have measures to collect and store the coal samples that have been tested, resulting in a waste of coal resources. In order to further solve this technical problem, the present embodiment discloses the following technical contents: the top of the detection table 1 is located at the lower right side of the conveyor belt 4 and is fixedly installed with a collecting guide plate 23, and a collecting box 7 is placed under the tail of the collecting guide plate 23. Through the cooperation of the collecting box 7 and the collecting guide plate 23, the coal samples that have been tested can be collected and stored in a targeted manner to avoid wasting coal resources. Among them, the top of the collecting guide plate 23 is fixedly connected with a cleaning brush 24, and the top of the cleaning brush 24 is in contact with the bottom right side of the conveyor belt 4. When the conveyor belt 4 conveys the coal samples that have been tested to the collection When the conveyor belt 4 is on the guide plate 23, the coal sample remaining on the conveyor belt 4 can be cleaned onto the collecting guide plate 23 by the cleaning brush 24, thereby cleaning the conveyor belt 4 and reducing the waste of coal samples. Specifically, a smoothing mechanism is arranged inside the collecting box 7, and the smoothing mechanism includes a moving rod 25 rotatably connected to the inner side of the collecting box 7, and the outer side of the moving rod 25 is rotatably connected to a smoothing roller 26, a third motor 27 is fixedly installed on the right side wall of the detection platform 1, and the output shaft of the third motor 27 is fixedly connected to a threaded rod 28, the outer side of the threaded rod 28 is threadedly connected to a moving ring 29, and one end of the moving ring 29 is fixedly connected to a sleeve 30, the sleeve 30 is limitedly connected to the moving rod 25, and a sensor 36 is embedded at the bottom end of the smoothing roller 26.

[0034] During use, when the coal samples enter the collection box 7 and accumulate to contact the inductor 36, a signal can be sent to the central control system to start the third motor 27. The third motor 27 drives the threaded rod 28 to rotate and drives the movable collar 29 to move. The movable collar 29 continues to drive the sleeve 30, the movable rod 25, and the smoothing roller 26 to move in sequence, so as to smooth the coal samples inside the collection box 7 and notify the staff to take out the full collection box 7. In addition, an electromagnet 31 is fixedly installed on the inner end wall of the sleeve 30, and a connecting magnet 32 is slidably connected to the opening of the sleeve 30. The connecting magnet 32 is inserted into one end of the movable rod 25. A pulling spring 33 is fixedly connected between the connecting magnet 32 and the inner end wall of the sleeve 30. By energizing and de-energizing the electromagnet 31 and the elastic effect of the pulling spring 33, the insertion and detachment of the connecting magnet 32 and the movable rod 25 can be realized, so as to respectively realize the operation of the smoothing mechanism and the taking out of the collection box 7. And a limiting plate 34 is slidably connected to the top of the detection table 1 on the right side of the collection box 7. A plurality of limiting springs 35 are fixedly connected between the limiting plate 34 and the detection table 1. And the top of the limiting plate 34 fixedly abuts against the collection box 7, thus preventing the collection box 7 from shaking randomly during the process of collecting coal samples.

[0035] The content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-spectral analysis system for online detection of coal quality, comprising a detection platform (1), a crushing cylinder (2), a support frame (3) and a spectrum detector (5) being installed on the top of the detection platform (1), a conveyor belt (4) being arranged on the inner side of the support frame (3), and a laser head (6) being installed inside the spectrum detector (5); characterized in that: The conveyor belt (4) is driven by a second motor (17). A flattening assembly is arranged on the top of the conveyor belt (4). The flattening assembly comprises a mounting frame (18) mounted on the top of the support frame (3). A flattening roller (19) is rotatably arranged on the inner side of the mounting frame (18). Transmission wheels (20) are installed on the outer side of the output shaft of the second motor (17) and the shaft of the flattening roller (19). Transmission belts (21) are transmitted on the outer sides of the two transmission wheels (20). Concentrating plates (22) are connected to the inner walls of both ends of the mounting frame (18), and the two concentrating plates (22) are close to each other and narrow from left to right. A collecting guide plate (23) is installed below the conveyor belt (4), and a collecting box (7) for collecting coal samples is placed below the tail of the collecting guide plate (23).

2. The multi-spectral analysis system for online detection of coal quality according to claim 1 is characterized in that: A feed hopper (8) and a discharge guide plate (9) are fixedly mounted on the top and right bottom of the crushing cylinder (2), respectively. The tail of the discharge guide plate (9) is located above the left side of the conveyor belt (4). A first motor (10) is fixedly mounted on the outer wall of one end of the crushing cylinder (2). An output shaft at one end of the first motor (10) passes through the interior of the crushing cylinder (2) and is fixedly connected to a crushing roller (11). A plurality of crushing curved knives (12) are evenly mounted on the outer wall of the crushing roller (11).

3. The multi-spectral analysis system for online detection of coal quality according to claim 2 is characterized in that: The crushing cylinder (2) is mounted on the top of the detection platform (1) via a buffer telescopic rod (13) that can slide relative to each other, and a damping spring (14) is fixedly mounted between two rod sections of the buffer telescopic rod (13).

4. The multi-spectral analysis system for online detection of coal quality according to claim 3 is characterized in that: A filter screen (15) is detachably mounted on the inner side of the top of the discharge guide plate (9) via four bolt connectors (16), and the filter screen (15) is used to screen the crushed coal sample, and the screw parts of the four bolt connectors (16) are respectively fixedly connected to the outer wall of the crushing barrel (2) and the inner wall of the discharge guide plate (9) located on the left side of the filter screen (15).

5. The multi-spectral analysis system for online detection of coal quality according to claim 4 is characterized in that: A cleaning brush (24) is fixedly connected to the top end of the collecting guide plate (23), and the top end of the cleaning brush (24) is in close contact with the right bottom end of the conveyor belt (4).

6. The multi-spectral analysis system for online detection of coal quality according to claim 5 is characterized in that: A smoothing mechanism is arranged inside the collection box (7), and the smoothing mechanism comprises a moving rod (25) rotatably connected to the inner side of the collection box (7), and the outer side of the moving rod (25) is rotatably connected to a smoothing roller (26), and a third motor (27) is fixedly installed on the right side wall of the detection platform (1), and the output shaft of the third motor (27) is fixedly connected to a threaded rod (28), and the outer side of the threaded rod (28) is threadedly connected to a moving collar (29), and one end of the moving collar (29) is fixedly connected to a sleeve (30), and the sleeve (30) is limitedly connected to the moving rod (25), and a sensor (36) is embedded and installed at the bottom end of the smoothing roller (26).

7. The multi-spectral analysis system for online detection of coal quality according to claim 6 is characterized in that: An electromagnet (31) is fixedly mounted on the inner end wall of the sleeve (30), a connecting magnet (32) is slidably connected to the opening of the sleeve (30), the connecting magnet (32) is inserted into one end of the moving rod (25), and a pull-back spring (33) is fixedly connected between the connecting magnet (32) and the inner end wall of the sleeve (30).

8. The multi-spectral analysis system for online detection of coal quality according to claim 7 is characterized in that: The top end of the detection platform (1) is located on the right side of the collection box (7) and is slidably connected to a limit plate (34); a plurality of limit springs (35) are fixedly connected between the limit plate (34) and the detection platform (1); and the top end of the limit plate (34) is fixedly abutted against the collection box (7).

9. The analysis method of the multi-spectral analysis system for online detection of coal quality according to claim 8, characterized in that: The following steps are involved: S1, a large coal sample is put into a crushing drum (2) from a feed hopper (8), and a first motor (10) drives a crushing roller (11) and a crushing curved knife (12) to rotate and crush the coal. After the coal is crushed, the coal is discharged from a discharge guide plate (9) through a filter screen (15) and slides onto a conveyor belt (4) for transportation; S2, driving the flattening roller (19) to rotate by the cooperation of the second motor (17), the transmission wheel (20), and the transmission belt (21), so as to flatten the coal sample on the conveyor belt (4), and continue to concentrate it through the concentration plate (22) so as to be sent to the spectrum detector (5) for spectrum analysis; S3, the coal sample enters the spectrometer (5), the laser head (6) emits near-infrared and X-ray fluorescence, and integrates the rapid detection technology of the spectral analysis system to achieve accurate identification of coal quality components. After the detection is completed, the coal sample is collected into the collection box (7) through the collection guide plate (23); S4. The third motor (27) drives the threaded rod (28) to rotate and drives the movable sleeve ring (29) to move, and then drives the sleeve (30), the movable rod (25), and the smoothing roller (26) to move in sequence to smooth the coal sample and notify the staff to take out the full collection box (7).

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