Coal quality testing device

Abstract

This invention discloses a coal quality testing device, including a cabinet and a sampling tube, a cyclone separator, a vibrating feeder, a weighing device, a ignition detection device, and a robotic arm disposed within the cabinet. It also includes a cleaning device, which includes a support platform, a lifting cylinder, a cover, a cleaning brush, and a suction pipe. One end of the suction pipe is connected to the cleaning brush, and the other end is connected to a ventilation powder pipe. The cleaning brush has a turbine blade inside. When the suction pipe is used for dust collection, it can drive the cleaning brush to rotate through the turbine blade to clean the container on the support platform.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, and particularly to a coal quality detection device. Background Technology

[0002] For coal-fired power units, the quality of the pulverized coal blown into the furnace has a significant impact on the economy and safety of combustion. Due to the current limitations of the industry's technological development, coal quality testing is usually carried out by taking samples from the main coal feeder belt. After sample preparation and burning in the laboratory, coal quality parameters are calculated based on the burning values ​​and fed back to boiler operators and coal blending personnel.

[0003] Because this method of coal quality testing is severely lagging and has poor sample representativeness, the coal quality test values ​​are not very helpful for on-site operation and adjustment personnel. Therefore, there is an urgent need for a device that can directly sample and test the coal powder input air-coal pipeline. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a coal quality testing device capable of online coal quality measurement, providing better guidance for on-site personnel.

[0005] According to an embodiment of the present invention, a coal quality testing device is applied to a coal-air duct with a sampling extension tube. The device includes a cabinet and, within the cabinet, sampling tubes, cyclone separators, a vibrating feeder, a weighing device, a ignition detection device, and a robotic arm. Multiple sampling tubes are provided, each detachably connected to a sampling extension tube. One sampling tube is configured to sample one coal-air duct. A one-way valve is provided on each sampling tube to prevent backflow of coal powder. A cyclone separator is provided in a one-to-one correspondence with each sampling tube, and the other end of each sampling tube is connected to the inlet of the corresponding cyclone separator. The vibrating feeder includes an electromagnet, a permanent magnet, a frequency converter, and a feed pipe. The electromagnet and the frequency converter are connected to the AC circuit. The permanent magnet is hinged to the cabinet by a torsion spring. The torsion spring is used to drive one end of the permanent magnet to abut against the feed pipe. The electromagnet is used to generate an alternating magnetic field to attract or repel the permanent magnet, causing the permanent magnet to vibrate. The permanent magnet can transmit the excitation force to the feed pipe. The powder outlets of multiple cyclone separators are all connected to the feed pipe in parallel through valves. The weighing device is used to support the container and weigh the coal powder in the container. The feeding pipe can discharge coal powder to the container on the weighing device. The ignition detection device is used to ignite the coal powder in the container and perform weighing detection. The robotic arm is set between the weighing device and the ignition detection device. The robotic arm is configured to clamp the container on the weighing device and transfer it to the ignition detection device, or to transfer the container in the ignition detection device to the weighing device after the coal powder has been ignited by the ignition detection device. The adsorber includes a shell, a baffle plate, a dust collection box, a sponge absorption block and a negative pressure fan. The shell is set in a cabinet. An air intake is opened at one end of the shell. The negative pressure fan is set at the other end of the shell. The baffle plate is set inside the shell. Several protruding suction nozzles are set on the side of the baffle plate near the air intake. The dust collection box is detachably embedded in the shell and is set between the air intake and the baffle plate. The sponge absorption block is embedded in the shell and is set between the baffle plate and the negative pressure fan.

[0006] It has at least the following beneficial effects: The sampling tubes directly sample from the air-coal pipeline, avoiding the lag of traditional methods and providing real-time feedback of coal quality data. This offers immediate guidance for boiler operation and coal blending, significantly improving combustion economy and safety. Multiple sampling tubes can simultaneously connect to multiple air-coal pipelines, ensuring comprehensive coal powder sample coverage and enhancing the representativeness and accuracy of test results. All devices are integrated into a single cabinet. A robotic arm automatically transfers containers, and a vibrating feeder precisely delivers coal powder. The weighing device and ignition detection device work in tandem, reducing manual intervention, improving testing efficiency, and minimizing errors. The vibrating feeder design, based on electromagnets and permanent magnets, uses a frequency converter to control the alternating magnetic field and vibration frequency, preventing coal powder blockage in the feed tube and ensuring continuous and uniform feeding. The modular design of all devices facilitates maintenance and expansion, adapting to the coal quality testing needs of air-coal pipelines of different sizes.

[0007] According to some embodiments of the present invention, a one-way valve is provided on the sampling tube to prevent backflow of pulverized coal.

[0008] According to some embodiments of the present invention, an adsorber is provided in the cabinet for adsorbing floating coal dust.

[0009] According to some embodiments of the present invention, the vibratory feeder is inclined downwards.

[0010] According to some embodiments of the present invention, the valve is connected to a vibrating feeder via a bellows.

[0011] According to some embodiments of the present invention, a discharge pipe is also included, which is connected to a vibrating feeder. A solenoid valve is provided on the discharge pipe to control the amount of coal powder discharged from the discharge pipe. The discharge pipe is used to discharge coal powder into a container on a weighing device.

[0012] According to some embodiments of the present invention, the weighing device is electrically connected to an electromagnet via a control module, and the electromagnet stops working when the weighing device reaches a predetermined weight.

[0013] According to some embodiments of the present invention, a storage platform is also included, which is disposed inside the cabinet and is used to store containers. A robotic arm is used to grab containers from the storage platform and transfer them to a weighing device.

[0014] According to some embodiments of the present invention, a cleaning device is also included. The cleaning device includes a support platform, a lifting cylinder, a cover, a cleaning brush, and a suction pipe. The support platform and the lifting cylinder are both disposed inside the cabinet. The support platform is used to place the container after the coal powder has been burned. The cover is connected to the lifting cylinder, which is used to drive the cover to rise and fall to cover or detach from the container opening on the support platform. The cleaning brush is rotatably connected to the lower end of the cover and is configured to extend into the container on the support platform. One end of the suction pipe is connected to the cleaning brush, and the other end of the suction pipe is connected to the ventilation powder pipe. The inner cavity of the cleaning brush is provided with a turbine blade. When the suction pipe is used for dust collection, it can drive the cleaning brush to rotate through the turbine blade to clean the container on the support platform.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the coal quality testing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the vibrating feeder of the coal quality testing device according to an embodiment of the present invention; Figure 3This is a schematic diagram of the cleaning device of the coal quality testing device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the sampling extension tube and sampling tube of the coal quality testing device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the adsorber in the coal quality testing device according to an embodiment of the present invention.

[0017] Icon labels: Sampling tube 100, nut 110, top block 120, sealing ring 130, storage platform 140, valve 150, container 160; Adsorber 170, housing 171, baffle plate 172, suction nozzle 172a; Dust collection box 173, sponge absorption block 174, negative pressure fan 175; Cyclone separator 200; Vibrating feeder 300, electromagnet 310, permanent magnet 320, frequency converter 330, feeding pipe 340, torsion spring 350, bellows 360; Discharge pipe 370, solenoid valve 371, vibrating frame 380, contact wheel 381; Weighing device 400, scorch detection device 500, robotic arm 600; Cleaning device 700, support platform 710, lifting cylinder 720, cover 730, sweeping brush 740, turbine blade 741, suction pipe 750; Air-powder duct 800, sampling extension tube 810, sealing block 820, elastic element 830; Cabinet body 900, leveling scraper 910. Detailed Implementation

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0020] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] Reference Figures 1 to 5 This invention discloses a coal quality testing device applied to a coal-air duct 800 with a sampling extension pipe 810. The device includes a cabinet 900 and a sampling pipe 100, a cyclone separator 200, a vibrating feeder 300, a weighing device 400, a ignition detection device 500, and a robotic arm 600, all housed within the cabinet 900. It should be noted that the sampling extension pipe 810 is an integral part of the coal-air duct 800. The coal-air duct 800 refers to the fuel inlet pipe of a power plant boiler. After coal is ground into powder and separated, the pulverized coal and air (i.e., air) are mixed at the outlet of the coal mill before being fed into the boiler for combustion. The pipe through which the pulverized coal and air flow is the coal-air duct 800. Real-time sampling and testing from this location can more accurately reflect the coal quality, primarily for online coal quality testing. It should be noted that a leveling scraper 910 is also installed inside the cabinet 900. When the container 160 is loaded into the ignition detection device 500, the rotating action of the leveling scraper 910 levels the coal powder inside the container 160, ensuring uniform ignition of the coal powder and guaranteeing detection accuracy and quality. The leveling scraper 910 is rotatably mounted inside the cabinet 900. Specifically, a lifting cylinder is installed inside the cabinet 900, with the motor mounted on the lifting module of the cylinder. The leveling scraper 910 is connected to the motor's shaft. Each sampling tube 100 is connected to a coal powder duct 800, and the recovery pipes are branched to the corresponding coal powder ducts 800, with valves installed on the branches. Only a portion of the coal powder ducts 800 is shown.

[0022] Reference Figure 1 Multiple sampling tubes 100 are provided, and each sampling tube 100 is detachably connected to a sampling extension tube 810. One sampling tube 100 is configured to sample one air-coal duct 800. Cyclone separators 200 are correspondingly installed with each sampling tube 100, and the other end of each sampling tube 100 is connected to the inlet of the corresponding cyclone separator 200. It is understood that multiple sampling tubes 100 allow sampling from multiple air-coal ducts 800, enabling coal quality sampling and testing from multiple air-coal ducts 800 using a single device, saving equipment space and costs. An air suction pump can be added to the pipeline between the sampling tube 100 and the cyclone separator 200 to extract coal dust. It is understood that the cyclone separator 200 is a conventional piece of equipment.

[0023] Reference Figure 2The vibrating feeder 300 includes an electromagnet 310, a permanent magnet 320, a frequency converter 330, and a feed pipe 340. The electromagnet 310 and the frequency converter 330 are connected to an AC circuit. The permanent magnet 320 is hinged to the cabinet 900 via a torsion spring 350. The torsion spring 350 drives one end of the permanent magnet 320 to abut against the feed pipe 340. The electromagnet 310 generates an alternating magnetic field to attract or repel the permanent magnet 320, causing the permanent magnet 320 to vibrate. The permanent magnet 320 can transmit the excitation force to the feed pipe 340 and the powder outlets of the multiple cyclone separators 200. All components are connected in parallel to the feed pipe 340 via valve 150. It should be noted that the AC circuit provides alternating current to the electromagnet 310, which generates an alternating magnetic field under the influence of this current. The magnetic field direction of the permanent magnet 320 remains constant. When the electromagnet 310 generates the alternating magnetic field, the permanent magnet 320 can be attracted and repelled at a certain frequency, thus achieving vibration. The frequency converter 330 can control the frequency of the alternating magnetic field by changing its frequency, thereby controlling the vibration frequency. A current-controlling rheostat can also be connected to the AC circuit. Alternatively, a common vibrator can be directly installed below the feed pipe 340, and the coal powder can be conveyed by vibrating the feed pipe 340.

[0024] Reference Figure 1 The weighing device 400 is used to support the container 160 and weigh the coal powder in the container 160. The feed pipe 340 can discharge coal powder onto the container 160 on the weighing device 400. The ignition detection device 500 is used to ignite the coal powder in the container 160 and perform weighing detection. The robotic arm 600 is disposed between the weighing device 400 and the ignition detection device 500. The robotic arm 600 is configured to grip and transfer the container 160 on the weighing device 400 to the ignition detection device 500, or to transfer the container 160 in the ignition detection device 500 to the weighing device 400 after the coal powder has been ignited by the ignition detection device 500. It should be noted that the container 160 is a crucible, and the purpose of the weighing device 400 is to weigh the coal powder collected initially so that the amount of coal powder discharged from the feed pipe 340 is predetermined. The weighing device 400 is a common electronic scale in the field.

[0025] It should be understood that the sampling tube 100 directly samples from the air-coal duct 800, avoiding the lag of traditional methods, providing real-time feedback of coal quality data, and offering immediate guidance for boiler operation and coal blending, significantly improving combustion economy and safety. Multiple sampling tubes 100 can simultaneously connect to multiple air-coal ducts 800, ensuring comprehensive coal powder sample coverage and enhancing the representativeness and accuracy of test results. All devices are integrated into a cabinet 900, with a robotic arm 600 automatically transferring the container 160, and a vibrating feeder 300 precisely conveying coal powder. The weighing device 400 and the ignition detection device 500 work in tandem to reduce manual intervention, improve detection efficiency, and lower errors. Based on the vibrating feeder design using an electromagnet 310 and a permanent magnet 320, the frequency converter 330 enables controllable alternating magnetic field and vibration frequency, preventing coal powder blockage in the feeder pipe 340 and ensuring continuous and uniform feeding. The modular design of each component of the equipment facilitates maintenance and expansion, and adapts to the coal quality testing needs of air-powder pipelines of different sizes.

[0026] It should be noted that, referring to Figure 4 A sealing block 820 is slidably connected inside the sampling extension tube 810. The sealing block 820 is connected to the sampling extension tube 810 through an elastic element 830. The elastic element 830 drives the sealing block 820 to seal the sampling extension tube 810. The outer peripheral wall of the sampling extension tube 810 is provided with threads. One end of the sampling tube 100 is rotatably connected to a nut 110. A top block 120 is provided inside the sampling tube 100. A sealing ring 130 is provided inside the nut 110. When the nut 110 is threadedly connected to the sampling extension tube 810, the top block 120 can push open the sealing block 820 to connect the air-powder pipe 800 with the sampling tube 100. The sealing ring 130 is used to seal the connection between the sampling tube 100 and the sampling extension tube 810.

[0027] Reference Figure 2The vibrating feeder 300 also includes a vibrating frame 380, which is connected to the cabinet 900 via a helical spring. A torsion spring 350 drives one end of a permanent magnet 320 to abut against the vibrating frame 380. A contact wheel 381 is provided on the vibrating frame 380, and one end of the permanent magnet 320 abuts against the contact wheel 381. The feed pipe 340 is inclined downwards. A valve 150 is connected to the feed pipe 340 via a bellows 360. It also includes a discharge pipe 370, which is connected to the feed pipe 340. A solenoid valve 371 is provided on the discharge pipe 370, which controls the amount of coal powder discharged from the discharge pipe 370. The discharge pipe 370 is used to discharge coal powder into the container 160 on the weighing device 400. Understandably, the vibrating frame 380 can vibrate in the vertical direction under the action of the helical spring. When the vibration of the permanent magnet 320 is transmitted to the contact wheel 381, the helical spring will also be compressed to a certain extent. That is, the vibrating frame 380 can drive the feed pipe 340 to vibrate in the vertical direction. Of course, the feed pipe 340 also vibrates in its axial direction, so that the coal powder in the feed pipe 340 can be vibrated and discharged.

[0028] Refer to 1 and Figure 5 A one-way valve (not shown in the figure) is installed on the sampling tube 100 to prevent backflow of coal powder. An adsorber is installed in the cabinet 900 to adsorb floating coal powder. It should be noted that the adsorber 170 includes a shell 171, a baffle plate 172, a dust collection box 173, a sponge absorption block 174, and a negative pressure fan 175. The shell 171 is installed in the cabinet 900, with an air intake at one end. The negative pressure fan 175 is installed at the other end of the shell 171. The baffle plate 172 is installed inside the shell 171, and several protruding suction nozzles 172a are provided on the side of the baffle plate 172 near the air intake. The dust collection box 173 is detachably embedded in the shell 171 and is located between the air intake and the baffle plate 172. The sponge absorption block 174 is embedded in the shell 171 and is located between the baffle plate 172 and the negative pressure fan 175. Understandably, the housing 171, as the main installation component, is made of plastic. The air intake and negative pressure fan are located in different positions, allowing sufficient absorption and stopping time for dust or coal dust in the cabinet 900. The baffle plate 172 acts to intercept the dust or coal dust, causing it to fall into the dust collection box 173. The protruding suction nozzle 172a on the baffle plate 172 reduces the probability of dust entering the rear end of the baffle plate 172 (the end near the negative pressure fan 175), thus reducing the adsorption pressure on the sponge absorber block 174. Both the dust collection box 173 and the sponge absorber block 174 are replaceable. After a predetermined time, the dust collection box 173 and the sponge absorber block 174 should be replaced. There should be no dust or coal dust in the cabinet 900, otherwise it may easily cause an explosion and sometimes interfere with the test results.

[0029] It is understandable that the sponge absorbent block 174 can absorb water before being placed into the shell 171, or the sponge absorbent block 174 can be replaced with a filler block such as an activated carbon absorbent block that can absorb dust.

[0030] In some embodiments, the weighing device 400 is electrically connected to the electromagnet 310 through a control module. When the weighing device 400 reaches a predetermined weight, the electromagnet 310 stops working. It should be noted that the so-called control module can be a PLC microcontroller or a computer.

[0031] Reference Figure 1 It also includes a storage platform 140, which is located inside the cabinet 900. The storage platform 140 is used to store containers 160. The robotic arm 600 is used to grab containers 160 from the storage platform 140 and transfer them to the weighing device 400. It can be understood that the storage platform 140 is mainly used as a transfer and temporary storage container 160 when calcining coal powder in multiple containers 160, and it can also be used for navigation and positioning of the robotic arm 600.

[0032] Reference Figure 3 It also includes a cleaning device 700, which comprises a support platform 710, a lifting cylinder 720, a cover 730, a cleaning brush 740, and a vacuum pipe 750. The support platform 710 and the lifting cylinder 720 are both located inside the cabinet 900. The support platform 710 is used to place the container 160 after the coal dust has been burned. The cover 730 is connected to the lifting cylinder 720, which is used to drive the cover 730 to rise and fall to cover or detach the container on the support platform 710. A cleaning brush 740 is rotatably connected to the lower end of the cover 730. The cleaning brush 740 is configured to extend into the container 160 on the support platform 710. One end of the suction pipe 750 is connected to the cleaning brush 740, and the other end of the suction pipe 750 is connected to the ventilation powder pipe 800. The inner cavity of the cleaning brush 740 is provided with a turbine blade 741. When vacuuming, the suction pipe 750 can drive the cleaning brush 740 to rotate through the turbine blade 741 to clean the container 160 on the support platform 710.

[0033] A coal quality testing method, employing a coal quality testing device, includes the following steps: S1, connect each sampling tube 100 to the sampling extension tube 810 on the corresponding air-powder pipe 800; S2, start electromagnet 310, so that feed tube 340 vibrates under the alternating magnetic field of permanent magnet 320 and electromagnet 310; S3, open the corresponding valve 150 to allow the coal powder in the corresponding cyclone separator 200 to fall into the feed pipe 340. Under the vibration of the feed pipe 340, the coal powder is transported into the container 160 on the weighing device 400 and weighed. S4, the container 160 on the weighing device 400 is held by the robotic arm 600 and placed into the ignition detection device 500 for weighing and ignition. Based on the ignition weight loss, the moisture, volatile matter, fixed carbon and ash content of the coal powder are calculated by weighing step by step, and the calorific value of the coal powder is calculated accordingly to determine the quality of the coal. S5. After the burning is completed, the robotic arm 600 moves the container 160 from the burning detection device 500 to the cleaning device 700 for cleaning, and then the robotic arm 600 moves the container 160 to the weighing device 400 to wait for the next coal powder sample to arrive.

[0034] It is understandable that the ignition detection device 500 is an existing device, which mainly measures the quality of coal powder by ignition, and will not be elaborated here. In step S5, after the container 160 is detected to be in place, the lifting cylinder 720 drives the cover 730 and the cleaning brush 740 to descend. When the cover 730 covers the container 160, the suction pipe 750 starts to suck up the dust inside the container 160. During the suction process, the cleaning brush 740 is driven to rotate by the turbine blade 741, which can also clean the container 160. Of course, a motor can also be set on the cantilever beam connected to the lifting cylinder 720. The main shaft of the motor is connected to the cover 730, and the motor directly drives the cover 730 to rotate, realizing a circumferential cleaning of the inner wall of the container 160. Of course, the motor cannot rotate continuously in one direction. The motor can rotate in both directions alternately to avoid the suction pipe 750 being twisted.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A coal quality detection device, characterized by, A powder duct (800) with a sampling extension tube (810) is used, comprising a cabinet (900) and a component disposed within the cabinet (900): Multiple sampling tubes (100) are provided. The sampling tubes (100) are detachably connected to the sampling extension tubes (810). Each sampling tube (100) is configured to sample a coal pulverizer pipe (800). A one-way valve is provided on the sampling tube (100) to prevent coal pulverizer backflow. Cyclone separators (200) are provided one-to-one with the sampling tubes (100), and the other end of the sampling tubes (100) is connected to the inlet of the corresponding cyclone separator (200); Vibrating feeder (300), the powder outlets of multiple cyclone separators (200) are connected in parallel to the vibrating feeder (300) through valves (150), the vibrating feeder (300) is used to transport coal powder; A weighing device (400) is used to support a container (160) and weigh the coal powder in the container (160), and the vibrating feeder (300) is capable of discharging coal powder into the container (160) on the weighing device (400). A ignition detection device (500) is used to ignite coal powder in a ignition container (160) and perform weighing detection; A robotic arm (600) is disposed between the weighing device (400) and the scorch detection device (500), the robotic arm (600) being capable of gripping or releasing the container (160), and the robotic arm (600) being configured to move back and forth between the weighing device (400) and the scorch detection device (500); The adsorber (170) includes a housing (171), a baffle plate (172), a dust collection box (173), a sponge absorption block (174), and a negative pressure fan (175). The housing (171) is located in the cabinet (900). An air intake is opened at one end of the housing (171). The negative pressure fan (175) is located at the other end of the housing (171). The baffle plate (172) is located inside the housing (171). 172) Several protruding suction nozzles (172a) are provided on one side near the air intake. The dust collection box (173) is detachably embedded in the housing (171). The dust collection box (173) is located between the air intake and the baffle plate (172). The sponge absorption block (174) is embedded in the housing (171). The sponge absorption block (174) is located between the baffle plate (172) and the negative pressure fan (175).

2. The coal quality detecting device according to claim 1, wherein The vibrating feeder (300) is inclined downward.

3. The coal quality detecting device according to claim 2, wherein The valve (150) is connected to the vibrating feeder (300) via a bellows (360).

4. The coal quality detecting device according to claim 3, wherein It also includes a discharge pipe (370) that is connected to the vibrating feeder (300). A solenoid valve (371) is provided on the discharge pipe (370). The solenoid valve (371) is used to control the amount of coal powder discharged from the discharge pipe (370). The discharge pipe (370) is used to discharge coal powder into the container (160) on the weighing device (400).

5. The coal quality detecting device according to claim 1, wherein The weighing device (400) is electrically connected to the vibrating feeder (300) through a control module. When the weighing device (400) reaches the predetermined weight, the vibrating feeder (300) stops working.

6. The coal quality detecting device according to claim 1, wherein It also includes a storage platform (140) disposed inside the cabinet (900), the storage platform (140) being used to store containers (160), and the robotic arm (600) being used to grab containers (160) from the storage platform (140) and transfer them to the weighing device (400).

7. The coal quality detecting device according to any one of claims 1 to 6, characterized by It also includes a cleaning device (700), which includes a support platform (710), a lifting cylinder (720), a cover (730), a cleaning brush (740), and a vacuum pipe (750). The support platform (710) and the lifting cylinder (720) are both located inside the cabinet (900). The support platform (710) is used to place the container (160) after burning coal powder. The cover (730) is connected to the lifting cylinder (720), which is used to drive the cover (730) to rise and fall to cover or detach the container (160) on the support platform (710). 0) The cleaning brush (740) is rotatably connected to the lower end of the cover (730). The cleaning brush (740) is configured to extend into the container (160) on the support platform (710). One end of the suction pipe (750) is connected to the cleaning brush (740), and the other end of the suction pipe (750) is connected to the air powder pipe (800). The inner cavity of the cleaning brush (740) is provided with a turbine blade (741). When the suction pipe (750) is vacuuming, it can drive the cleaning brush (740) to rotate through the turbine blade (741) to clean the container (160) on the support platform (710).

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