A device and method for rapid analysis of coal composition

Abstract

The present invention relates to the technical field of rapid analysis of coal components, and in particular to a device and method for rapid analysis of coal components, comprising a screening box, a grinding mechanism installed on the top of the screening box, the grinding mechanism comprising a grinding box, the grinding box fixedly mounted on the top of the screening box, the grinding box being in communication with the screening box, a bottom grinding disc fixedly mounted inside the grinding box, a first bracket fixedly mounted on the top of the grinding box, and a first motor fixedly mounted on the bottom of the first bracket. The present invention can adjust the pressure of the top grinding disc according to the amount of coal residue that has not passed the screening through the setting of the grinding mechanism. If the amount of unscreened coal is large, it means that the current grinding particle size is too coarse. At this time, increasing the pressure of the top grinding disc can enhance the extrusion and grinding effect, making the coal particles finer and improving the screening rate. If the amount of unscreened coal is small, the pressure can be reduced to avoid excessive grinding, reduce the generation of fine powder, and avoid ineffective energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of rapid coal component analysis, in particular to a device and method for rapid coal component analysis. Background Art

[0002] Coal is a solid combustible mineral that is gradually formed by ancient plants buried underground and undergoing complex biochemistry and physicochemistry. Coal mines need to continuously sample and test the coal during the mining process to ensure the quality of the coal. The test objects of coal testing are moisture, ash, volatile matter, fixed carbon content and calorific value. The coal testing and processing process includes sampling, crushing, reduction, drying and other steps. After the coal sample is taken, it is generally prepared within half an hour, and the collected coal samples need to be crushed to less than 6mm.

[0003] Traditional grinding equipment mostly uses a fixed-pressure grinding mode, which cannot dynamically adjust the grinding force according to the characteristics of the coal such as hardness and moisture content. For example, when the hardness of the coal particles is high, fixed pressure may lead to insufficient grinding and an increase in unscreened particles. When the moisture content of the coal is high, excessive grinding can easily cause fine powder agglomeration, which not only affects the screening efficiency, but also increases subsequent detection errors. Summary of the Invention

[0004] In order to make up for the above deficiencies, the present invention provides a device for rapid analysis of coal composition that overcomes the above technical problems or at least partially solves the above problems.

[0005] The present invention is achieved in that:

[0006] The present invention provides a device for rapid analysis of coal components, comprising a screening box, a grinding mechanism installed on the top of the screening box, and the grinding mechanism comprising:

[0007] A grinding box, which is fixedly mounted on the top of the screening box and is in communication with the screening box, and a bottom grinding disc is fixedly mounted inside the grinding box;

[0008] A first bracket, wherein the first bracket is fixedly mounted on the top of the grinding box, a first motor is fixedly mounted on the bottom of the first bracket, and a transmission shaft is fixedly mounted on the output end of the first motor;

[0009] A top grinding disc is fixedly mounted on the bottom of the transmission shaft, an annular plate is slidably mounted on the surface of the transmission shaft, a first spring is sleeved on the surface of the transmission shaft, and the first spring is arranged between the annular plate and the top grinding disc.

[0010] In one embodiment of the present invention, a feed port is provided on the surface of the top grinding disc, a rotating cylinder is rotatably installed on the top of the annular plate, the rotating cylinder is movably connected to the transmission shaft, a first mounting plate is fixedly installed on the surface of the grinding box, two first mounting plates are provided, and a second motor is fixedly installed on the bottom of the right first mounting plate.

[0011] In one embodiment of the present invention, the output end of the second motor passes through the top of the right first mounting plate and is rotatably connected to the right first mounting plate. A mounting cylinder is fixedly installed on the top of the right first mounting plate, and a first threaded rod is rotatably installed inside the mounting cylinder. The first threaded rod is fixedly connected to the second motor, and a threaded sleeve is sleeved on the surface of the first threaded rod. A sliding sleeve is slidably installed on the surface of the mounting cylinder. A sliding groove is provided on the surface of the mounting cylinder, and the threaded sleeve is fixedly connected to the sliding sleeve. A connecting plate is fixedly installed between the sliding sleeve and the rotating cylinder.

[0012] In one embodiment of the present invention, a screening mechanism is installed inside the screening box, and the screening mechanism includes a mounting frame, which is fixedly installed inside the screening box, and a positioning rod is slidably installed inside the mounting frame. There are multiple positioning rods, and conical screens are fixedly installed on the tops of the multiple positioning rods. A second spring is provided between the mounting frame and the conical screen, and there are multiple second springs.

[0013] In one embodiment of the present invention, a conveying cylinder is fixedly installed inside the first mounting plate on the left side, and a spiral conveying rod is provided inside the conveying cylinder. The spiral conveying rod conveys coal through a built-in motor. A discharge cylinder is provided on the top of the conveying cylinder, and a connecting groove is provided between the bottom of the conveying cylinder and the screening box. The connecting groove is used to convey the coal remaining on the conical screen, and a flow monitor is provided inside the connecting groove.

[0014] In one embodiment of the present invention, a third motor is fixedly installed at the bottom of the conveying cylinder, and a rotating shaft is fixedly installed at the output end of the third motor. The rotating shaft passes through the interior of the screening box and is rotatably connected to the screening box. A crankshaft is provided inside the rotating shaft. There are two crankshafts, and connecting rods are rotatably installed inside the two crankshafts. A horizontal plate is fixedly installed inside the conical screen, and the top of the connecting rod is rotatably connected to the horizontal plate.

[0015] In one embodiment of the present invention, a concave-convex plate is fixedly installed on the bottom of the mounting frame, a second threaded rod is rotatably installed on the top of the concave-convex plate, the second threaded rod passes through the top of the horizontal plate and is threadedly connected to the horizontal plate, a top plate is fixedly installed on the top of the second threaded rod, a striking rod is provided on the surface of the top plate, a ball head is provided on the end of the striking rod, and a convex point is provided on the inner side of the conical screen.

[0016] In one embodiment of the present invention, a sampling mechanism is provided at the bottom of the screening box, and the sampling mechanism includes a sampling box, the sampling box is fixedly installed with the bottom of the screening box, the sampling box is communicated with the screening box, a material receiving trough is fixedly installed inside the sampling box, a support plate is provided on the top of the material receiving trough, a threaded cylinder is rotatably installed inside the support plate, a sliding rod is slidably installed in the recess of the concave-convex plate, a push plate is fixedly installed on the top of the sliding rod, a third spring is sleeved on the surface of the sliding rod, the third spring is provided between the push plate and the concave-convex plate, a threaded groove is provided at the bottom of the sliding rod, and the bottom of the sliding rod is threadedly connected to the threaded cylinder.

[0017] In one embodiment of the present invention, a rotating disk is fixedly installed on the bottom of the threaded cylinder, a connecting column is fixedly installed on the bottom of the rotating disk, a cross bar is fixedly installed on both sides of the sampling box, a second mounting plate is slidably installed on the surface of the cross bar, a straight groove plate is movably installed on the surface of the connecting column, both ends of the straight groove plate are fixedly connected to the second mounting plate, a plurality of scrapers are provided on the bottom of the second mounting plate, a sliding rail is fixedly installed on the bottom of the material receiving trough, two groups of sliding rails are provided, sliding plates are slidably installed inside the two groups of sliding rails, a sampling cylinder is detachably installed on the bottom of the sliding plate, a partition is fixedly installed on the bottom of the material receiving trough, an electric telescopic rod is fixedly installed on the side of the partition, and the electric telescopic rod is fixedly connected to the sliding plate.

[0018] A method for rapid analysis of coal composition, applicable to a device for rapid analysis of coal composition, comprising the following steps:

[0019] S1: Place the coal sample on top of the top grinding disc. The sample falls between the top grinding disc and the bottom grinding disc through the feed port. Then manually start the second motor, which drives the first threaded rod to rotate. The threaded sleeve, sliding sleeve and connecting plate push the rotating cylinder up and down, compressing or releasing the first spring, so that the pressure of the top grinding disc on the sample reaches the default value.

[0020] S2: Start the first motor to drive the transmission shaft and the top grinding disk to rotate and grind the coal sample. At the same time, start the third motor, which drives the conical screen to shake up and down through the rotating shaft, crankshaft and connecting rod to screen the ground sample. When the conical screen shakes, it drives the cross plate to move, causing the second threaded rod to rotate. The ball head of the striking rod continuously hits the raised points inside the screen to prevent the screen holes from being blocked.

[0021] S3: The flow monitor monitors the amount of coal particles in the connecting trough that have not passed through the conical screen in real time. If the flow exceeds the maximum threshold, the second motor automatically starts to increase the pressure on the top grinding disc to enhance the grinding effect. If the flow is less than the minimum threshold, the second motor reverses to reduce the pressure. If the flow is within the default range, the second motor does not operate, and the unscreened coal is returned to the grinding disc through the screw conveyor rod and the discharge barrel for re-grinding.

[0022] S4: When the crankshaft rotates, it squeezes the plate, and the sliding rod drives the threaded barrel to rotate back and forth, which in turn causes the rotating disk and the straight groove plate to drive the scraper to move back and forth on the surface of the receiving trough. The scraper flattens the surface of the screened coal particles, breaking the segregation phenomenon caused by the difference in particle size, so that the particle size, moisture, ash content and other indicators of the surface coal are evenly distributed;

[0023] S5: After the scraping is completed, the electric telescopic rod is started to push the sliding plate to move on the sliding track, so that the sampling tube is aligned with the discharge port at the bottom of the receiving trough. The coal particles in the receiving trough fall into the sampling tube. After the sampling tube moves to the outside of the sampling box, the staff disassembles the sampling tube and takes out the sample for component analysis.

[0024] The present invention provides a device for rapid analysis of coal components, which has the following beneficial effects:

[0025] 1. The present invention can adjust the pressure of the top grinding disk according to the amount of coal residue that has not passed the screening through the setting of the grinding mechanism. If the amount of unscreened coal is large, it means that the current grinding particle size is too coarse. At this time, increasing the pressure of the top grinding disk can enhance the extrusion and grinding effect, making the coal particles finer and improving the screening rate. If the amount of unscreened coal is small, the pressure can be reduced to avoid excessive grinding, reduce the generation of fine powder, and avoid ineffective energy consumption.

[0026] 2. The present invention can use the setting of the screening mechanism to make the ball head hit the convex point, so that the conical screen generates instantaneous impact force. Coal and other materials often contain fine powder, wet material or sticky substances, which are easy to form a paste on the surface of the screen. The instantaneous vibration generated by the impact can destroy the adhesion between the particles, causing the particles blocked in the screen holes to fall off, and the particles close to the size of the screen holes are easily stuck or squeezed through the screen due to static state, resulting in inaccurate classification. The instantaneous vibration generated by the impact can make the critical particles bounce repeatedly, reducing the probability of coarse particles mixing into fine materials.

[0027] 3. The present invention can scrape and level the coal particles after screening through the setting of the sampling mechanism. When the coal is piled up after screening, segregation is likely to occur due to the difference in particle size, that is, large particles roll to the bottom of the pile and fine powder is retained at the top, resulting in uneven particle size distribution on the pile surface. The pile surface is scraped and leveled by the scraper, forcibly disrupting the particle distribution, so that the particle size, moisture, ash content and other indicators of the surface coal tend to be uniform. Sampling can avoid generalizing from a single case, and the obtained samples are more representative. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the bottom grinding disc structure provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the top grinding disc structure provided in an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the conical screen structure provided in an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the bottom-up structure of a conical screen provided in an embodiment of the present invention;

[0034] Figure 6 A schematic structural diagram of a sampling mechanism provided in an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a scraper structure provided in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the bottom-up structure of the sampling box provided in an embodiment of the present invention.

[0037] In the figure: 1. Screening box; 2. Grinding mechanism; 201. Grinding box; 202. Bottom grinding disc; 203. First bracket; 204. First motor; 205. Drive shaft; 206. Top grinding disc; 207. Annular plate; 208. First spring; 209. Feeding port; 210. Rotating cylinder; 211. First mounting plate; 212. Second motor; 213. Mounting cylinder; 214. First threaded rod; 215. Threaded sleeve; 216. Sliding sleeve; 217. Sliding groove; 218. Connecting plate; 3. Screening mechanism; 301. Mounting frame; 302. Positioning rod; 303. Conical screen; 304. Second spring; 305. Conveying cylinder; 306. Screw conveying rod; 307. Discharging cylinder; 308. Connecting groove ; 309, flow monitor; 310, third motor; 311, rotating shaft; 312, crankshaft; 313, connecting rod; 314, cross plate; 315, concave-convex plate; 316, second threaded rod; 317, top plate; 318, striking rod; 319, ball head; 320, convex point; 4, sampling mechanism; 401, sampling box; 402, receiving trough; 403, support plate; 404, threaded barrel; 405, sliding rod; 406, abutment plate; 407, third spring; 408, rotating disk; 409, connecting column; 410, cross bar; 411, second mounting plate; 412, straight groove plate; 413, scraper; 414, sliding track; 415, sliding plate; 416, partition; 417, electric telescopic rod; 418, sampling barrel. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] Reference Figures 1-8The present technical solution provides a device for rapid analysis of coal composition, which specifically includes a screening box 1. A grinding mechanism 2 is installed on the top of the screening box 1. The grinding mechanism 2 includes a grinding box 201, a first bracket 203 and a top grinding disc 206. The grinding box 201 is fixedly installed on the top of the screening box 1. The grinding box 201 is connected to the screening box 1. A bottom grinding disc 202 is fixedly installed inside the grinding box 201. The first bracket 203 is fixedly installed on the top of the grinding box 201. A first motor 204 is fixedly installed on the bottom of the first bracket 203. A transmission shaft 205 is fixedly installed on the output end of the first motor 204. The top grinding disc 206 is fixedly installed on the bottom of the transmission shaft 205. An annular plate 207 is slidably installed on the surface of the transmission shaft 205. The surface of the moving shaft 205 is sleeved with a first spring 208, which is arranged between the annular plate 207 and the top grinding disc 206. The surface of the top grinding disc 206 is provided with a feed port 209. The staff puts the coal sample to be ground into the top of the top grinding disc 206, and the coal sample enters the gap between the top grinding disc 206 and the bottom grinding disc 202 through the feed port 209. When the first motor 204 drives the top grinding disc 206 to rotate, the coal sample entering the gap can be ground. The setting of the first spring 208 can adjust the pressure of the top grinding disc 206 to ensure that the particle size of the ground coal meets the requirements. The top of the annular plate 207 is rotatably installed with a rotating cylinder 210. The rotating cylinder 210 is movably connected to the transmission shaft 205. A first mounting plate 211 is fixedly installed on the surface of the grinding box 201. Two first mounting plates 211 are provided. A second motor 212 is fixedly installed on the bottom of the right first mounting plate 211. The output end of the second motor 212 passes through the top of the right first mounting plate 211 and is rotatably connected to the right first mounting plate 211. A mounting cylinder 213 is fixedly installed on the top of the right first mounting plate 211. A first threaded rod 214 is rotatably installed inside the mounting cylinder 213. The first threaded rod 214 is fixedly connected to the second motor 212. A threaded sleeve 215 is sleeved on the surface of the first threaded rod 214. A sliding sleeve 216 is slidably installed on the surface of the mounting cylinder 213. The surface of the mounting cylinder 213 is provided with a The sliding groove 217, the threaded sleeve 215 and the sliding sleeve 216 are fixedly connected, and a connecting plate 218 is fixedly installed between the sliding sleeve 216 and the rotating cylinder 210. When starting the equipment, the staff can first manually start the second motor 212, so that the second motor 212 drives the first threaded rod 214 to rotate, and the rotation of the first threaded rod 214 can drive the threaded sleeve 215 to move up and down. The up and down movement of the threaded sleeve 215 can drive the sliding sleeve 216 to move up and down inside the sliding groove 217, and the up and down movement of the sliding sleeve 216 can drive the connecting plate 218 to move up and down. The up and down movement of the connecting plate 218 can drive the rotating cylinder 210 to move up and down, thereby compressing and releasing the first spring 208.The pressure applied by the top grinding disc 206 to the coal sample reaches a default value. When the screening box 1 screens the ground coal sample, the second motor 212 can adjust the pressure of the top grinding disc 206 according to the amount of coal residue that has not passed the screening. If the amount of unscreened coal is large, it means that the current grinding particle size is too coarse. Increasing the pressure of the top grinding disc 206 can enhance the squeezing and grinding effect, making the coal particles finer and improving the screening rate. If the amount of unscreened coal is small, the pressure can be reduced to avoid over-grinding, reduce the generation of fine powder, and avoid ineffective energy consumption.

[0040] Reference Figures 1-8, This embodiment also proposes that a screening mechanism 3 is installed inside the screening box 1, and the screening mechanism 3 includes a mounting frame 301, the mounting frame 301 is fixedly installed inside the screening box 1, a positioning rod 302 is slidably installed inside the mounting frame 301, a plurality of positioning rods 302 are provided, and a conical screen 303 is fixedly installed on the top of the plurality of positioning rods 302, a second spring 304 is provided between the mounting frame 301 and the conical screen 303, a plurality of second springs 304 are provided, and a conveying cylinder 305 is fixedly installed inside the first mounting plate 211 on the left, and a spiral conveying rod 306 is provided inside the conveying cylinder 305, and the spiral conveying rod 306 conveys coal through a built-in motor, and the coal that does not pass through the conical screen 303 on the conical screen 303 is removed. The particles can be transported through the spiral conveying rod 306, and a discharge cylinder 307 is provided on the top of the conveying cylinder 305. A connecting groove 308 is provided between the bottom of the conveying cylinder 305 and the screening box 1. The connecting groove 308 is used to transport the coal remaining on the conical screen 303. The coal that has not passed through the conical screen 303 is transported by the spiral conveying rod 306 through the discharge cylinder 307 and falls back to the top of the top grinding disc 206, and is re-ground through the feed port 209. A flow monitor 309 is provided inside the connecting groove 308. The flow monitor 309 can monitor the amount of coal particles passing through the connecting groove 308. The flow monitor 309 is connected to the second motor 212 through an electrical signal. If the coal passing through the connecting groove 308 When the amount of coal particles is within the default range, the second motor 212 does not start. If the amount of coal particles passing through exceeds the maximum threshold, the second motor 212 starts to increase the pressure of the top grinding disc 206. If the amount of coal particles passing through is less than the minimum threshold, the second motor 212 is reversed and started to reduce the pressure of the top grinding disc 206. The bottom of the conveying cylinder 305 is fixedly installed with a third motor 310, and the output end of the third motor 310 is fixedly installed with a rotating shaft 311. The rotating shaft 311 passes through the interior of the screening box 1 and is rotatably connected to the screening box 1. A crankshaft 312 is provided inside the rotating shaft 311. There are two crankshafts 312. Connecting rods 313 are rotatably installed inside the two crankshafts 312. The interior of the conical screen 303 is fixedly installed There is a horizontal plate 314, the top of the connecting rod 313 is rotatably connected to the horizontal plate 314, the bottom of the mounting frame 301 is fixedly installed with a concave-convex plate 315, the top of the concave-convex plate 315 is rotatably installed with a second threaded rod 316, the second threaded rod 316 passes through the top of the horizontal plate 314 and is threadedly connected to the horizontal plate 314, the top of the second threaded rod 316 is fixedly installed with a top plate 317, the surface of the top plate 317 is provided with a striking rod 318, the end of the striking rod 318 is provided with a ball head 319, the inner side of the conical screen 303 is provided with a convex point 320, the third motor 310 can drive the rotating shaft 311 to rotate, the rotation of the rotating shaft 311 can drive the crankshaft 312 to rotate, and the rotation of the crankshaft 312 can drive the connecting rod 313 to move up and down.The up and down movement of the connecting rod 313 can drive the conical screen 303 to vibrate up and down, thereby screening the coal particles that fall onto the surface of the conical screen 303. When the conical screen 303 vibrates up and down, it can drive the cross plate 314 to move up and down, thereby driving the second threaded rod 316 to rotate. The rotation of the second threaded rod 316 can drive the striking rod 318 to rotate. When the striking rod 318 rotates, the ball head 319 can hit the protrusion 320, causing the conical screen 303 to generate an instantaneous impact force. Coal and other materials often contain fine powder, wet materials or sticky substances, which easily form a sticky network on the screen surface. The instantaneous vibration generated by the impact can destroy the adhesion between particles, causing particles stuck in the screen holes to fall off. In addition, particles close to the size of the screen holes are easily stuck or squeezed through the screen due to static state, resulting in inaccurate classification. The instantaneous vibration generated by the impact can cause critical particles to bounce repeatedly, reducing the probability of coarse particles mixing into fine materials.

[0041] Reference Figures 1-8, This embodiment also proposes that a sampling mechanism 4 is provided at the bottom of the screening box 1, and the sampling mechanism 4 includes a sampling box 401, the sampling box 401 is fixedly installed with the bottom of the screening box 1, the sampling box 401 is connected to the screening box 1, and a material receiving trough 402 is fixedly installed inside the sampling box 401, and a support plate 403 is provided on the top of the material receiving trough 402. A threaded cylinder 404 is rotatably installed inside the support plate 403, and a sliding rod 405 is slidably installed in the recess of the concave-convex plate 315. A resist plate 406 is fixedly installed on the top of the sliding rod 405, and a third spring 407 is sleeved on the surface of the sliding rod 405. The third spring 407 is arranged between the resist plate 406 and the concave-convex plate 315, and a threaded groove is provided at the bottom of the sliding rod 405. The bottom of the sliding rod 405 is connected to the The threaded barrel 404 is threadedly connected. When the crankshaft 312 rotates to contact the plate 406, the plate 406 can be squeezed to move the plate 406 downward. When the crankshaft 312 rotates to separate from the plate 406, the plate 406 returns to its original position under the action of the third spring 407, and the plate 406 moves upward. The up and down movement of the plate 406 can drive the sliding rod 405 to move up and down, and the up and down movement of the sliding rod 405 can drive the threaded barrel 404 to rotate back and forth. A rotating disk 408 is fixedly installed at the bottom of the threaded barrel 404, and a connecting column 409 is fixedly installed at the bottom of the rotating disk 408. Cross bars 410 are fixedly installed on both sides of the sampling box 401. The surface of the cross bar 410 slides A second mounting plate 411 is installed, and a straight slot plate 412 is movably installed on the surface of the connecting column 409. Both ends of the straight slot plate 412 are fixedly connected to the second mounting plate 411. A plurality of scrapers 413 are provided at the bottom of the second mounting plate 411. The rotation of the threaded cylinder 404 can drive the rotating disk 408 to rotate, and the rotation of the rotating disk 408 can drive the straight slot plate 412 to move back and forth. The reciprocating movement of the straight slot plate 412 can drive the scraper 413 to move back and forth, so that the scraper 413 can scrape the coal particles after screening. A sliding rail 414 is fixedly installed at the bottom of the material receiving trough 402, and a discharge port is opened at the bottom of the material receiving trough 402. There are two groups of sliding rails 414, and the interiors of the two groups of sliding rails 414 are A sliding plate 415 is slidably installed, and a sampling barrel 418 is detachably installed at the bottom of the sliding plate 415. A partition 416 is fixedly installed at the bottom of the material receiving trough 402, and an electric telescopic rod 417 is fixedly installed on the side of the partition 416. The electric telescopic rod 417 is fixedly connected to the sliding plate 415. When the scraping operation is completed, the electric telescopic rod 417 is started to drive the sliding plate 415 to move inside the sliding track 414. When the sampling barrel 418 moves to just below the discharge port at the bottom of the material receiving trough 402, the scraped coal particles inside the material receiving trough 402 can enter the interior of the sampling barrel 418. The staff takes out the sampling barrel 418 after waiting for the sampling barrel 418 to move to the outside of the sampling box 401.The coal particles inside the sampling tube 418 are then analyzed. When the coal is sieved and piled up, segregation can easily occur due to differences in particle size. Large particles tend to roll to the bottom of the pile, while fine particles remain at the top, resulting in an uneven particle size distribution on the surface. Scraper 413 is used to flatten the surface, forcibly disrupting the particle distribution and making the surface coal's particle size, moisture content, ash content, and other indicators more uniform. This helps avoid biased sampling and results in a more representative sample.

[0042] Reference Figures 1-8 This embodiment also proposes a method for rapid analysis of coal components, which is applicable to a device for rapid analysis of coal components. The steps are as follows:

[0043] S1: Place the coal sample on top of the top grinding disc 206. The sample falls between the top grinding disc 206 and the bottom grinding disc 202 through the feed port 209. Then manually start the second motor 212, which drives the first threaded rod 214 to rotate. The rotating cylinder 210 is pushed up and down through the threaded sleeve 215, the sliding sleeve 216 and the connecting plate 218, compressing or releasing the first spring 208, so that the pressure of the top grinding disc 206 on the sample reaches the default value.

[0044] S2: Start the first motor 204, driving the transmission shaft 205 and the top grinding disk 206 to rotate and grind the coal sample. Simultaneously, start the third motor 310, which drives the conical screen 303 to vibrate up and down through the rotating shaft 311, the crankshaft 312 and the connecting rod 313 to screen the ground sample. When the conical screen 303 vibrates, it drives the cross plate 314 to move, causing the second threaded rod 316 to rotate. The ball head 319 of the striking rod 318 continuously strikes the protrusion 320 on the inner side of the screen to prevent the screen holes from being blocked.

[0045] S3: The flow monitor 309 monitors in real time the amount of coal particles in the communication trough 308 that have not passed through the conical screen 303. If the flow exceeds a maximum threshold, the second motor 212 automatically starts to increase the pressure on the top grinding disc 206 to enhance the grinding effect. If the flow is less than a minimum threshold, the second motor 212 reverses to reduce the pressure. If the flow is within a default range, the second motor 212 does not operate, and the unscreened coal is returned to the grinding disc via the screw conveyor rod 306 and the discharge barrel 307 for re-grinding.

[0046] S4: When the crankshaft 312 rotates, it presses the plate 406, and drives the threaded cylinder 404 to rotate back and forth through the sliding rod 405. In turn, the rotating disk 408 and the straight groove plate 412 drive the scraper 413 to move back and forth on the surface of the receiving trough 402. The scraper 413 scrapes the surface of the screened coal particles to flatten the segregation caused by the difference in particle size, so that the particle size, moisture content, ash content and other indicators of the surface coal are evenly distributed;

[0047] S5: After the scraping is completed, the electric telescopic rod 417 is started to push the sliding plate 415 to move on the sliding track 414, so that the sampling tube 418 is aligned with the discharge port at the bottom of the receiving trough 402, and the coal particles in the receiving trough 402 fall into the sampling tube 418. After the sampling tube 418 moves to the outside of the sampling box 401, the staff disassembles the sampling tube 418 and takes out the sample for component analysis.

[0048] Specifically, the working process or working principle of the coal composition rapid analysis device is as follows: the staff puts the coal sample to be ground into the top of the top grinding disc 206, and the coal sample enters the gap between the top grinding disc 206 and the bottom grinding disc 202 through the feed port 209. When the first motor 204 drives the top grinding disc 206 to rotate, the coal sample entering the gap can be ground. The setting of the first spring 208 can adjust the pressure of the top grinding disc 206 to ensure that the particle size of the ground coal meets the requirements. When starting the equipment, the staff can first manually start the second motor 212 to make the second motor 212 drive the first threaded rod 2 14 is rotated, the rotation of the first threaded rod 214 can drive the threaded sleeve 215 to move up and down, the up and down movement of the threaded sleeve 215 can drive the sliding sleeve 216 to move up and down inside the sliding groove 217, and the up and down movement of the sliding sleeve 216 can drive the connecting plate 218 to move up and down, and the up and down movement of the connecting plate 218 can drive the rotating cylinder 210 to move up and down, thereby compressing and releasing the first spring 208, so that the pressure applied by the top grinding disc 206 to the coal sample reaches the default value. When the screening box 1 screens the ground coal sample, the second motor 212 can adjust the pressure of the top grinding disc 206 according to the amount of coal residue that has not passed the screening.

[0049] The coal particles on the conical screen 303 that have not passed through the conical screen 303 can be transported by the spiral conveying rod 306. The coal that has not passed through the conical screen 303 is transported by the spiral conveying rod 306 through the discharge barrel 307 and falls back to the top of the top grinding disc 206, and is re-ground through the feed port 209. The flow monitor 309 can monitor the amount of coal particles passing through the connecting groove 308. The flow monitor 309 is connected to the second motor 212 through an electrical signal. If the amount of coal particles passing through the connecting groove 308 is within a default range, the second motor 212 will not start. If the amount of coal particles passing through exceeds the maximum threshold, the second motor 212 will start to increase the pressure of the top grinding disc 206. If the amount of coal particles passing through is less than the minimum threshold, the second motor 212 will be reversed to start. The third motor 310 can drive the rotating shaft 311 to rotate, and the rotation of the rotating shaft 311 can drive the crankshaft 312 to rotate. The rotation of the crankshaft 312 can drive the connecting rod 313 to move up and down. The up and down movement of the connecting rod 313 can drive the conical screen 303 to shake up and down, so as to screen the coal particles that fall onto the surface of the conical screen 303. When the conical screen 303 shakes up and down, it can drive the cross plate 314 to move up and down, and then drive the second threaded rod 316 to rotate. The rotation of the second threaded rod 316 can drive the striking rod 318 to rotate. When the striking rod 318 rotates, the ball head 319 can hit the protrusion 320, so that the conical screen 303 generates an instantaneous impact force.

[0050] When the crankshaft 312 rotates to contact the push plate 406, the push plate 406 can be squeezed to move the push plate 406 downward. When the crankshaft 312 rotates to separate from the push plate 406, the push plate 406 returns to its original position under the action of the third spring 407, and the push plate 406 moves upward. The up and down movement of the push plate 406 can drive the sliding rod 405 to move up and down, and the up and down movement of the sliding rod 405 can drive the threaded cylinder 404 to rotate back and forth. The rotation of the threaded cylinder 404 can drive the rotating disk 408 to rotate, and the rotation of the rotating disk 408 can drive the straight slot plate 412 to move back and forth. The reciprocating movement of the straight groove plate 412 can drive the scraper 413 to move back and forth, so that the scraper 413 can scrape the coal particles after screening. When the scraping operation is completed, the electric telescopic rod 417 is started to drive the sliding plate 415 to move inside the sliding track 414. When the sampling barrel 418 moves to the bottom of the material receiving trough 402 directly below the discharge port, the scraped coal particles inside the material receiving trough 402 can enter the interior of the sampling barrel 418. The staff takes out the sampling barrel 418 after waiting for the sampling barrel 418 to move to the outside of the sampling box 401.

Claims

1. A device for rapid analysis of coal composition, comprising a screening box (1), characterized in that: A grinding mechanism (2) is installed on the top of the screening box (1), and the grinding mechanism (2) comprises: A grinding box (201), the grinding box (201) is fixedly mounted on the top of the screening box (1), the grinding box (201) is connected to the screening box (1), and a bottom grinding disc (202) is fixedly mounted inside the grinding box (201); A first bracket (203), the first bracket (203) is fixedly mounted on the top of the grinding box (201), a first motor (204) is fixedly mounted on the bottom of the first bracket (203), and a transmission shaft (205) is fixedly mounted on the output end of the first motor (204); A top grinding disc (206), the top grinding disc (206) is fixedly mounted on the bottom of the transmission shaft (205), an annular plate (207) is slidably mounted on the surface of the transmission shaft (205), a first spring (208) is sleeved on the surface of the transmission shaft (205), and the first spring (208) is arranged between the annular plate (207) and the top grinding disc (206); A feed port (209) is provided on the surface of the top grinding disc (206); a rotating cylinder (210) is rotatably mounted on the top of the annular plate (207); the rotating cylinder (210) is movably connected to the transmission shaft (205); a first mounting plate (211) is fixedly mounted on the surface of the grinding box (201); two first mounting plates (211) are provided; a second motor (212) is fixedly mounted on the bottom of the right first mounting plate (211); The output end of the second motor (212) passes through the top of the right first mounting plate (211) and is rotatably connected to the right first mounting plate (211). A mounting cylinder (213) is fixedly installed on the top of the right first mounting plate (211). A first threaded rod (214) is rotatably installed inside the mounting cylinder (213). The first threaded rod (214) is fixedly connected to the second motor (212). A threaded sleeve (215) is sleeved on the surface of the first threaded rod (214). A sliding sleeve (216) is slidably installed on the surface of the mounting cylinder (213). A sliding groove (217) is provided on the surface of the mounting cylinder (213). The threaded sleeve (215) is fixedly connected to the sliding sleeve (216). A connecting plate (218) is fixedly installed between the sliding sleeve (216) and the rotating cylinder (210).

2. The rapid analysis device for coal composition according to claim 1, characterized in that: A screening mechanism (3) is installed inside the screening box (1), and the screening mechanism (3) includes a mounting frame (301), the mounting frame (301) is fixedly installed inside the screening box (1), a positioning rod (302) is slidably installed inside the mounting frame (301), a plurality of positioning rods (302) are provided, a conical screen (303) is fixedly installed on the top of the plurality of positioning rods (302), a second spring (304) is provided between the mounting frame (301) and the conical screen (303), and a plurality of second springs (304) are provided.

3. The rapid analysis device for coal composition according to claim 2, characterized in that: A conveying cylinder (305) is fixedly installed inside the first mounting plate (211) on the left side. A spiral conveying rod (306) is provided inside the conveying cylinder (305). The spiral conveying rod (306) conveys coal through a built-in motor. A discharge cylinder (307) is provided at the top of the conveying cylinder (305). A connecting groove (308) is provided between the bottom of the conveying cylinder (305) and the screening box (1). The connecting groove (308) is used to convey the coal remaining on the conical screen (303). A flow monitor (309) is provided inside the connecting groove (308).

4. The rapid analysis device for coal composition according to claim 3, characterized in that: A third motor (310) is fixedly mounted on the bottom of the conveying cylinder (305), and a rotating shaft (311) is fixedly mounted on the output end of the third motor (310). The rotating shaft (311) passes through the interior of the screening box (1) and is rotatably connected to the screening box (1). A crankshaft (312) is provided inside the rotating shaft (311), and two crankshafts (312) are provided. Connecting rods (313) are rotatably mounted inside the two crankshafts (312). A transverse plate (314) is fixedly mounted inside the conical screen (303), and the top of the connecting rod (313) is rotatably connected to the transverse plate (314).

5. The rapid analysis device for coal composition according to claim 4, characterized in that: A concave-convex plate (315) is fixedly mounted on the bottom of the mounting frame (301), a second threaded rod (316) is rotatably mounted on the top of the concave-convex plate (315), the second threaded rod (316) passes through the top of the transverse plate (314) and is threadedly connected to the transverse plate (314), a top plate (317) is fixedly mounted on the top of the second threaded rod (316), a striking rod (318) is provided on the surface of the top plate (317), a ball head (319) is provided at the end of the striking rod (318), and a convex point (320) is provided on the inner side of the conical screen (303).

6. The rapid analysis device for coal composition according to claim 5, characterized in that: The bottom of the screening box (1) is provided with a sampling mechanism (4), and the sampling mechanism (4) includes a sampling box (401), the sampling box (401) is fixedly mounted on the bottom of the screening box (1), the sampling box (401) is connected to the screening box (1), a material receiving trough (402) is fixedly mounted inside the sampling box (401), a support plate (403) is provided on the top of the material receiving trough (402), and a threaded cylinder (403) is rotatably mounted inside the support plate (403). 4), a sliding rod (405) is slidably installed in the recess of the concave-convex plate (315), a supporting plate (406) is fixedly installed on the top of the sliding rod (405), a third spring (407) is sleeved on the surface of the sliding rod (405), and the third spring (407) is arranged between the supporting plate (406) and the concave-convex plate (315), a threaded groove is provided at the bottom of the sliding rod (405), and the bottom of the sliding rod (405) is threadedly connected to the threaded cylinder (404).

7. The rapid analysis device for coal composition according to claim 6, characterized in that: A rotating disk (408) is fixedly mounted on the bottom of the threaded barrel (404), a connecting column (409) is fixedly mounted on the bottom of the rotating disk (408), a cross bar (410) is fixedly mounted on both sides of the sampling box (401), a second mounting plate (411) is slidably mounted on the surface of the cross bar (410), a straight groove plate (412) is movably mounted on the surface of the connecting column (409), both ends of the straight groove plate (412) are fixedly connected to the second mounting plate (411), and a plurality of scrapers ( 413), a sliding track (414) is fixedly installed at the bottom of the material receiving trough (402), and two groups of sliding tracks (414) are provided. A sliding plate (415) is slidably installed inside the two groups of sliding tracks (414), and a sampling tube (418) is detachably installed at the bottom of the sliding plate (415). A partition (416) is fixedly installed at the bottom of the material receiving trough (402), and an electric telescopic rod (417) is fixedly installed on the side of the partition (416), and the electric telescopic rod (417) is fixedly connected to the sliding plate (415).

8. A method for rapid analysis of coal components, applicable to the device for rapid analysis of coal components according to claim 7, characterized in that: Here are the steps: S1: Place the coal sample on the top of the top grinding disc (206), and the sample falls between the top grinding disc (206) and the bottom grinding disc (202) through the feed port (209), and then manually start the second motor (212), which drives the first threaded rod (214) to rotate, and pushes the rotating cylinder (210) up and down through the threaded sleeve (215), the sliding sleeve (216) and the connecting plate (218), compressing or releasing the first spring (208), so that the pressure of the top grinding disc (206) on the sample reaches the default value; S2: Start the first motor (204), drive the transmission shaft (205) and the top grinding disc (206) to rotate, grind the coal sample, and start the third motor (310) at the same time, which drives the conical screen (303) to shake up and down through the rotating shaft (311), the crankshaft (312) and the connecting rod (313) to screen the ground sample. When the conical screen (303) shakes, it drives the horizontal plate (314) to move, causing the second threaded rod (316) to rotate, and the ball head (319) of the striking rod (318) continuously strikes the protrusion (320) on the inner side of the screen to prevent the screen holes from being blocked; S3: The flow monitor (309) monitors in real time the amount of coal particles in the connecting trough (308) that have not passed through the conical screen (303). If the flow exceeds a maximum threshold, the second motor (212) automatically starts to increase the pressure of the top grinding disc (206) to enhance the grinding effect. If the flow is less than a minimum threshold, the second motor (212) reverses to reduce the pressure. If the flow is within a default range, the second motor (212) does not operate, and the unscreened coal is returned to the grinding disc through the screw conveyor rod (306) and the discharge barrel (307) to be ground again. S4: When the crankshaft (312) rotates, it presses the plate (406), and drives the threaded cylinder (404) to rotate back and forth through the sliding rod (405), thereby causing the rotating disk (408) and the straight groove plate (412) to drive the scraper (413) to move back and forth on the surface of the receiving trough (402). The scraper (413) scrapes the surface of the screened coal particles to flatten the segregation phenomenon caused by the difference in particle size, so that the particle size, moisture content and ash content of the surface coal are evenly distributed; S5: After the scraping is completed, the electric telescopic rod (417) is started to push the sliding plate (415) to move on the sliding track (414), so that the sampling tube (418) is aligned with the discharge port at the bottom of the receiving trough (402), and the coal particles in the receiving trough (402) fall into the sampling tube (418). After the sampling tube (418) moves to the outside of the sampling box (401), the staff disassembles the sampling tube (418) and takes out the sample for component analysis.

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