An automatic coal mixing device for coal detection

Abstract

The utility model discloses a coal automatic mixing device for coal detection, including main body frame, crusher, the output fixed connection of first rotary motor has first toothed roller, first gear is fixedly connected with first toothed roller, second gear is engaged with second gear, and one side fixed connection of second gear has first sprocket, one side swing joint of first sliding block has second sprocket, and one end of first sliding groove is installed with third electric push rod, the inside sliding connection of third sliding groove has third sliding block, and one end of third sliding groove is installed with second electric push rod, the utility model discloses user through starting third electric push rod simultaneously, make first sliding block move in first sliding groove and second sliding block move in second sliding groove, can therefore adjust the interval of first sprocket and second sprocket, this design can be convenient for adjusting the interval between two sets of toothed rollers in the crusher, and does not influence transmission operation, thereby reach the purpose of adjusting the size of broken coal specification.

Description

Technical Field

[0001] This utility model relates to the field of coal testing technology, specifically to an automated coal mixing device for coal testing. Background Technology

[0002] Coal mixing devices use specific mechanical structures or automated systems to uniformly mix multiple coal samples (subsamples) from different sources, batches, or locations to eliminate problems such as uneven coal particle distribution and compositional differences, ultimately producing representative mixed samples (large or small samples). Their core function is to ensure the accuracy and impartiality of subsequent coal quality testing results (such as analysis of indicators like ash content, moisture, calorific value, and sulfur content).

[0003] The core working principle of the coal mixing device is to uniformly mix multiple dispersed sub-samples (small batches, local samples) collected from raw coal through specific physical actions and process control, ultimately forming a "mixed sample" that can represent the overall quality of the raw coal. This provides an accurate and reliable sample basis for subsequent detection of key indicators such as ash content, sulfur content, and calorific value. Specifically, it can be broken down into: 1. Sub-sample reception and temporary storage (ensuring that the sample is "complete and uncontaminated"), 2. Physical mixing (the core step, achieving "uniform dispersion"), and 3. Mixed sample discharge and cleaning (ensuring "sample integrity and device readiness").

[0004] During operation, the coal mixing device used for coal testing produces coal particles of a relatively uniform size through its crushing device. When staff need to change the size of the crushed coal, the adjustment process is quite complex. Utility Model Content

[0005] To solve the above-mentioned technical problems, an automated coal mixing device for coal testing is provided. This technical solution solves the problem mentioned in the background technology that the crushing device produces coal particles of relatively uniform size, and the adjustment method is relatively complicated when the operator needs to change the size of the crushed coal.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An automated coal mixing device for coal testing includes a main frame, a conveyor platform fixedly connected to the top of the main frame, and a crusher fixedly connected to one side of the main frame for crushing coal.

[0008] A first rotary motor is installed on the front surface of the crusher, and the output end of the first rotary motor is fixedly connected to a first toothed roller located inside the crusher.

[0009] The first gear is rotatably connected to the rear surface of the crusher, and the first gear is fixedly connected to one end of the first toothed roller via a rotating shaft;

[0010] A second gear is rotatably connected to the rear surface of the crusher. The second gear meshes with the second gear. A first sprocket is fixedly connected to one side of the second gear.

[0011] A first sliding groove is formed on the rear surface of the crusher. A first slider is slidably connected inside the first sliding groove. Sealing telescopic pads are provided between the two sides of the first slider and the first sliding groove. A second sprocket is rotatably connected to one side of the first slider. A third electric push rod is installed at one end of the first sliding groove. The output end of the third electric push rod is fixedly connected to one end of the first slider.

[0012] A second sliding groove is formed on the rear surface of the crusher. A second slider is slidably connected inside the second sliding groove. The top of the second slider is connected to the top of the second sliding groove through a spring. A third sprocket is rotatably connected to one side of the second slider. A transmission chain is wound around the outside of the first sprocket, the second sprocket and the third sprocket.

[0013] A third sliding groove is formed on the front surface of the crusher. A third slider is slidably connected inside the third sliding groove. Sealing telescopic pads are provided between the two sides of the third slider and the third sliding groove. A second electric push rod is installed at one end of the third sliding groove. The output end of the second electric push rod is fixedly connected to one end of the third slider.

[0014] The second toothed roller is located inside the crusher. One end of the second toothed roller is fixedly connected to one end of the second sprocket via a rotating shaft, and the other end of the second toothed roller is rotatably connected to one side of the third slider.

[0015] Preferably, a baffle is fixedly connected to the bottom of the crusher, a heating box located below the crusher is fixedly connected to one side of the main frame, heating plates are installed on all four walls inside the heating box, a rotating rod is rotatably connected to the top of the heating box, a fourth rotary motor is installed on the top of the heating box, and the output end of the fourth rotary motor is fixedly connected to one end of the rotating rod.

[0016] Preferably, a fixing block is fixedly connected to the outer side of the rotating rod, an electromagnetic sliding groove is provided inside the fixing block, an electromagnetic slider is slidably connected inside the electromagnetic sliding groove, sealing telescopic pads are provided between the two sides of the electromagnetic slider and the electromagnetic sliding groove, and a screen is fixedly connected to one end of the electromagnetic slider.

[0017] Preferably, a second fixing plate is fixedly connected to one side of the heating box, a first electric push rod is installed on the top of the second fixing plate, the output end of the first electric push rod is fixedly connected to the first fixing plate, and a movable box is fixedly connected to one side of the first fixing plate.

[0018] Preferably, the bottom of the movable box is sloped, a first discharge port is provided on one side of the bottom of the movable box, a sixth rotary motor is installed at the bottom of the movable box, the output end of the sixth rotary motor is fixedly connected to a second rotary door that cooperates with the first discharge port, and a second discharge port is provided at the bottom of the heating box.

[0019] Preferably, the bottom of the heating box is provided with a fixed frame, the top of the fixed frame is fixedly connected to a mixer, the top of the mixer is provided with a feed inlet, a fifth rotary motor is installed on one side of the feed inlet, the output end of the fifth rotary motor is fixedly connected to an electrostatic dust removal plate, and a blower communicating with the interior of the mixer is installed on the front surface of the mixer.

[0020] Preferably, a second rotary motor is installed on the front surface of the mixer, and the output end of the second rotary motor is fixedly connected to a rotary shaft located inside the mixer. The other end of the rotary shaft is rotatably connected to one end inside the mixer. Multiple sets of stirring paddles are fixedly connected to the outside of the rotary shaft, and a rotating plate is fixedly connected to the outside of the rotary shaft. Multiple sets of scrapers that fit against the inner wall of the mixer are fixedly connected to one side of the rotating plate.

[0021] Preferably, the bottom of the mixer is provided with a third discharge port, a third rotary motor is installed on one side of the third discharge port, and the output end of the third rotary motor is fixedly connected to a first rotary door that matches the third discharge port.

[0022] Compared with the prior art, this utility model provides an automated coal mixing device for coal testing, which has the following beneficial effects: By simultaneously activating the third electric push rod, the user causes the first slider to move in the first sliding groove and the second slider to move in the second sliding groove. A second sprocket is rotatably connected to one side of the first slider, and a third sprocket is fixedly connected to one side of the second slider. The first sprocket is fixedly connected to one side of the second gear on the rear surface of the crusher, thus allowing adjustment of the distance between the first and second sprockets. After adjusting the distance, activating the first rotary motor rotates the first toothed roller, simultaneously driving the first gear to rotate. The first gear then rotates the second gear, causing the three sets of rollers to rotate synchronously via the transmission chain. This, in turn, rotates the first toothed roller fixedly connected to the second sprocket. The other end of the second toothed roller is rotatably connected to the third slider. The third slider moves in the third sliding groove via the second electric push rod, thus achieving synchronous position adjustment with the first slider. This design facilitates adjustment of the distance between the two sets of toothed rollers in the crusher without affecting transmission operation, thereby achieving the purpose of adjusting the size of the crushed coal. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the front view of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the crusher assembly of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the screening component of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the mixer assembly of this utility model;

[0027] Figure 5 This is a partial enlarged structural diagram of component A of this utility model.

[0028] The numbers on the map are:

[0029] 1. Main frame; 2. Conveying platform; 3. Crusher; 4. First rotary motor; 5. First toothed roller; 6. Second toothed roller; 7. Baffle; 8. Screen; 9. Moving box; 10. First fixed plate; 11. Second fixed plate; 12. First electric push rod; 13. Heating box; 14. Electrostatic dust removal plate; 15. Mixer; 16. Fixed frame; 17. Second rotary motor; 18. Blower; 19. Third rotary motor; 20. First revolving door; 21. Second electric push rod; 22. Third electric push rod; 23. First sliding groove; 24. Second sliding groove; 25. First slider; 26. Second slider; 27. Spring; 28. First sprocket; 29. ​​Second sprocket; 30. Third sprocket; 31. Transmission chain; 32. First gear; 33. Second gear; 34. Fourth rotary motor; 35. Rotating rod; 36. Fixed block; 37. Electromagnetic sliding groove; 38. Electromagnetic slider; 39. Sixth rotary motor; 40. Second revolving door; 41. Fifth rotary motor; 42. Rotating shaft; 43. Rotating plate; 44. Scraper; 45. Stirring paddle; 46. Feed inlet; 47. Third sliding groove; 48. Third slider. Detailed Implementation

[0030] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0031] Example 1

[0032] Please refer to Figure 1 , Figure 2 and Figure 5 As shown, an automated coal mixing device for coal testing includes a main frame 1, a conveyor platform 2 fixedly connected to the top of the main frame 1, and a crusher 3 fixedly connected to one side of the main frame 1 for crushing coal.

[0033] The first rotary motor 4 is installed on the front surface of the crusher 3, and the output end of the first rotary motor 4 is fixedly connected to the first toothed roller 5 located inside the crusher 3.

[0034] The first gear 32 is rotatably connected to the rear surface of the crusher 3. The first gear 32 is fixedly connected to one end of the first toothed roller 5 via a rotating shaft.

[0035] The second gear 33 is rotatably connected to the rear surface of the crusher 3. The second gear 33 meshes with the second gear 33. The first sprocket 28 is fixedly connected to one side of the second gear 33.

[0036] A first sliding groove 23 is formed on the rear surface of the crusher 3. A first slider 25 is slidably connected inside the first sliding groove 23. Sealing telescopic pads are provided between the two sides of the first slider 25 and the first sliding groove 23. A second sprocket 29 is rotatably connected to one side of the first slider 25. A third electric push rod 22 is installed at one end of the first sliding groove 23. The output end of the third electric push rod 22 is fixedly connected to one end of the first slider 25.

[0037] A second sliding groove 24 is formed on the rear surface of the crusher 3. A second slider 26 is slidably connected inside the second sliding groove 24. The top of the second slider 26 is connected to the top of the second sliding groove 24 through a spring 27. A third sprocket 30 is rotatably connected to one side of the second slider 26. A transmission chain 31 is wound around the outside of the first sprocket 28, the second sprocket 29 and the third sprocket 30.

[0038] A third sliding groove 47 is formed on the front surface of the crusher 3. A third slider 48 is slidably connected inside the third sliding groove 47. Sealing expansion pads are provided between the two sides of the third slider 48 and the third sliding groove 47. A second electric push rod 21 is installed at one end of the third sliding groove 47. The output end of the second electric push rod 21 is fixedly connected to one end of the third slider 48.

[0039] The second toothed roller 6 is located inside the crusher 3. One end of the second toothed roller 6 is fixedly connected to one end of the second sprocket 29 via a rotating shaft, and the other end of the second toothed roller 6 is rotatably connected to one side of the third slider 48.

[0040] In this embodiment, when the user needs to adjust the coal crushing size, the user can simultaneously activate the third electric push rod 22, causing the first slider 25 to move in the first sliding groove 23 and the second slider 26 to move in the second sliding groove 24. A second sprocket 29 is rotatably connected to one side of the first slider 25, and a third sprocket 30 is fixedly connected to one side of the second slider 26. A first sprocket 28 is fixedly connected to one side of the second gear 33 on the rear surface of the crusher 3. Therefore, the distance between the first sprocket 28 and the second sprocket 29 can be adjusted. After adjusting the distance, activating the first rotary motor 4 will rotate the first toothed roller 5, simultaneously driving the first gear 32 to rotate. The first gear 32 will rotate the second gear 33, causing the three sets of rollers to rotate synchronously through the transmission chain 31, thereby rotating the first toothed roller 5 which is fixedly connected to the second sprocket 29. The other end of the second toothed roller 6 is rotatably connected to the third slider 48. The third slider 48 moves in the third sliding groove 47 through the second electric push rod 21, thus achieving synchronous adjustment of its position with the first slider 25. This design facilitates the adjustment of the distance between the two sets of toothed rollers in the crusher 3 without affecting the transmission operation. Since both sides of the third slider 48 and both sides of the first slider 25 are equipped with sealing expansion pads, coal dust can be prevented from entering the third sliding groove 47 and the first sliding groove 23.

[0041] Example 2

[0042] Please refer to Figure 1 and Figure 3 As shown, a baffle 7 is fixedly connected to the bottom of the crusher 3, and a heating box 13 located below the crusher 3 is fixedly connected to one side of the main frame 1. Heating plates are installed on all four walls inside the heating box 13. A rotating rod 35 is rotatably connected to the top of the heating box 13. A fourth rotary motor 34 is installed on the top of the heating box 13. The output end of the fourth rotary motor 34 is fixedly connected to one end of the rotating rod 35.

[0043] A fixing block 36 is fixedly connected to the outside of the rotating rod 35. An electromagnetic sliding groove 37 is opened inside the fixing block 36. An electromagnetic slider 38 is slidably connected inside the electromagnetic sliding groove 37. Sealing expansion pads are provided between the two sides of the electromagnetic slider 38 and the electromagnetic sliding groove 37. A screen 8 is fixedly connected to one end of the electromagnetic slider 38.

[0044] In this embodiment, the crushed coal falls onto the screen 8 below the crusher 3. The user moves the electromagnetic slider 38 on the rotating rod 35 in the electromagnetic sliding groove 37, causing the screen 8 to shake. This causes the crushed coal on the screen 8 to be screened into the heating box 13 below. Since the heating box 13 is equipped with heating plates on all four walls, the screened coal can be dried. Since the electromagnetic slider 38 is equipped with sealing expansion pads on both sides, coal dust can be prevented from entering the electromagnetic sliding groove 37.

[0045] Example 3

[0046] Please refer to Figure 1 and Figure 2 As shown, a second fixing plate 11 is fixedly connected to one side of the heating box 13, a first electric push rod 12 is installed on the top of the second fixing plate 11, the output end of the first electric push rod 12 is fixedly connected to the first fixing plate 10, and a movable box 9 is fixedly connected to one side of the first fixing plate 10.

[0047] The bottom of the movable box 9 is sloped, and a first discharge port is opened on one side of the bottom of the movable box 9. A sixth rotary motor 39 is installed at the bottom of the movable box 9. The output end of the sixth rotary motor 39 is fixedly connected to a second rotary door 40 that cooperates with the first discharge port. A second discharge port is opened at the bottom of the heating box 13.

[0048] In this embodiment, after the screen 8 has finished screening the coal, the coal that has not passed through the screen 8 accumulates on the screen 8. The fourth rotary motor 34 is started, which causes the rotating rod 35 to rotate, thereby causing the screen 8 to flip and pour the coal that has not passed through the screen 8 into the moving box 9. Then, the first electric push rod 12 on the top of the second fixed plate 11 is started, which pushes the first fixed plate 10 and moves the moving box 9 to the side above the crusher 3. Then, the sixth rotary motor 39 is started, which rotates the second rotating door 40, so that the coal that has not passed through the screen slides out from the first discharge port into the crusher 3 for crushing again.

[0049] Example 4

[0050] Please refer to Figure 1 and Figure 4 As shown, the bottom of the heating box 13 is provided with a fixed frame 16, and the top of the fixed frame 16 is fixedly connected to a mixer 15. The top of the mixer 15 is provided with a feed inlet 46, and a fifth rotary motor 41 is installed on one side of the feed inlet 46. An electrostatic dust removal plate 14 is fixedly connected to the output end of the fifth rotary motor 41. A blower 18 communicating with the inside is installed on the front surface of the mixer 15.

[0051] A second rotary motor 17 is mounted on the front surface of the mixer 15. The output end of the second rotary motor 17 is fixedly connected to a rotary shaft 42 located inside the mixer 15. The other end of the rotary shaft 42 is rotatably connected to one end inside the mixer 15. Multiple sets of stirring paddles 45 are fixedly connected to the outside of the rotary shaft 42. A rotating plate 43 is fixedly connected to the outside of the rotary shaft 42. Multiple sets of scrapers 44 that are in contact with the inner wall of the mixer 15 are fixedly connected to one side of the rotating plate 43.

[0052] The bottom of the mixer 15 is provided with a third discharge port, and a third rotary motor 19 is installed on one side of the third discharge port. The output end of the third rotary motor 19 is fixedly connected to a first rotary door 20 that matches the third discharge port.

[0053] In this embodiment, after the sieved and dried coal enters the mixer 15, the second rotary motor 17 is started, causing the rotary shaft 42 to rotate, which in turn drives the mixing paddle 45 to stir. The scraper 44 of the rotary shaft 42 will simultaneously scrape the coal adhering to the inner wall of the mixer 15. During operation, the blower 18 is started to blow the dust and impurities in the mixer 15 out of the third discharge port. Since the third discharge port is closed by the electrostatic dust removal plate 14, the electrostatic dust removal plate 14 will adsorb the dust, thereby achieving the dust removal effect.

[0054] The working principle and usage procedure of this device are as follows: When the user needs to adjust the size of the coal crushing scale, the user can simultaneously activate the third electric push rod 22, causing the first slider 25 to move in the first sliding groove 23 and the second slider 26 to move in the second sliding groove 24. A second sprocket 29 is rotatably connected to one side of the first slider 25, and a third sprocket 30 is fixedly connected to one side of the second slider 26. A first sprocket 28 is fixedly connected to one side of the second gear 33 on the rear surface of the crusher 3. Therefore, the distance between the first sprocket 28 and the second sprocket 29 can be adjusted. After adjusting the distance, the first rotary... Rotating motor 4 rotates the first toothed roller 5, which in turn drives the first gear 32 to rotate. The first gear 32 then rotates the second gear 33, causing all three sets of rollers to rotate synchronously via the transmission chain 31. This, in turn, rotates the first toothed roller 5, which is fixedly connected to the second sprocket 29. The other end of the second toothed roller 5 is rotatably connected to the third slider 48, which moves in the third sliding groove 47 via the second electric push rod 21. This design facilitates adjustment of the distance between the two sets of toothed rollers in the crusher 3. The crushed coal falls onto the screen 8 below the crusher 3. The user activates the electromagnetic slider 38 on the rotating rod 35. Moving within the electromagnetic sliding groove 37 causes the screen 8 to vibrate, thereby sieving the crushed coal onto the heating box 13 below. Since the heating box 13 has heating plates installed on all four walls, the sieved coal can be dried. The fourth rotary motor 34 is activated, causing the rotating rod 35 to rotate, which in turn causes the screen 8 to flip, pouring the coal that has not passed through the screen 8 into the moving box 9. Then, the first electric push rod 12 on top of the second fixed plate 11 is activated, pushing the first fixed plate 10 and simultaneously moving the moving box 9 upwards to one side above the crusher 3. Finally, the sixth rotary motor is activated. 39. This allows unscreened coal to slide out from the first discharge port into the crusher 3 for further crushing. After the screened and dried coal enters the mixer 15, the second rotary motor 17 is started, causing the rotating shaft 42 to rotate, which in turn drives the mixing paddle 45 to mix. The scraper 44 of the rotating shaft 42 will simultaneously scrape the coal adhering to the inner wall of the mixer 15. During operation, the blower 18 is started to blow the dust and impurities in the mixer 15 out to the third discharge port. Since the third discharge port is closed by the electrostatic dust removal plate 14, the electrostatic dust removal plate 14 will adsorb the dust, thereby achieving the dust removal effect.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automated coal mixing device for coal testing, characterized in that, Includes a main frame (1), a conveyor platform (2) fixedly connected to the top of the main frame (1), and a crusher (3) fixedly connected to one side of the main frame (1) for crushing coal; The first rotary motor (4) is installed on the front surface of the crusher (3), and the output end of the first rotary motor (4) is fixedly connected to the first toothed roller (5) located inside the crusher (3); The first gear (32) is rotatably connected to the rear surface of the crusher (3), and the first gear (32) is fixedly connected to one end of the first toothed roller (5) through a rotating shaft; A second gear (33) is rotatably connected to the rear surface of the crusher (3). The second gear (33) meshes with the second gear (33). A first sprocket (28) is fixedly connected to one side of the second gear (33). A first sliding groove (23) is formed on the rear surface of the crusher (3). A first slider (25) is slidably connected inside the first sliding groove (23). Sealing expansion pads are provided between the two sides of the first slider (25) and the first sliding groove (23). A second sprocket (29) is rotatably connected to one side of the first slider (25). A third electric push rod (22) is installed at one end of the first sliding groove (23). The output end of the third electric push rod (22) is fixedly connected to one end of the first slider (25). A second sliding groove (24) is opened on the rear surface of the crusher (3). A second slider (26) is slidably connected inside the second sliding groove (24). The top of the second slider (26) is connected to the top of the second sliding groove (24) through a spring (27). A third sprocket (30) is rotatably connected to one side of the second slider (26). A transmission chain (31) is wound around the outside of the first sprocket (28), the second sprocket (29) and the third sprocket (30). A third sliding groove (47) is formed on the front surface of the crusher (3). A third slider (48) is slidably connected inside the third sliding groove (47). Sealing expansion pads are provided between the two sides of the third slider (48) and the third sliding groove (47). A second electric push rod (21) is installed at one end of the third sliding groove (47). The output end of the second electric push rod (21) is fixedly connected to one end of the third slider (48). The second toothed roller (6) is located inside the crusher (3). One end of the second toothed roller (6) is fixedly connected to one end of the second sprocket (29) via a rotating shaft, and the other end of the second toothed roller (6) is rotatably connected to one side of the third slider (48).

2. The automated coal mixing device for coal testing according to claim 1, characterized in that: A baffle (7) is fixedly connected to the bottom of the crusher (3). A heating box (13) located below the crusher (3) is fixedly connected to one side of the main frame (1). Heating plates are installed on all four walls inside the heating box (13). A rotating rod (35) is rotatably connected to the top of the heating box (13). A fourth rotary motor (34) is installed on the top of the heating box (13). The output end of the fourth rotary motor (34) is fixedly connected to one end of the rotating rod (35).

3. The automated coal mixing device for coal testing according to claim 2, characterized in that: A fixing block (36) is fixedly connected to the outside of the rotating rod (35). An electromagnetic sliding groove (37) is provided inside the fixing block (36). An electromagnetic slider (38) is slidably connected inside the electromagnetic sliding groove (37). A sealing telescopic pad is provided between the two sides of the electromagnetic slider (38) and the electromagnetic sliding groove (37). A screen (8) is fixedly connected to one end of the electromagnetic slider (38).

4. The automated coal mixing device for coal testing according to claim 2, characterized in that: A second fixing plate (11) is fixedly connected to one side of the heating box (13). A first electric push rod (12) is installed on the top of the second fixing plate (11). The output end of the first electric push rod (12) is fixedly connected to the first fixing plate (10). A movable box (9) is fixedly connected to one side of the first fixing plate (10).

5. The automated coal mixing device for coal testing according to claim 4, characterized in that: The bottom of the movable box (9) is sloping. A first discharge port is provided on one side of the bottom of the movable box (9). A sixth rotary motor (39) is installed at the bottom of the movable box (9). A second rotary door (40) that cooperates with the first discharge port is fixedly connected to the output end of the sixth rotary motor (39). A second discharge port is provided at the bottom of the heating box (13).

6. The automated coal mixing device for coal testing according to claim 2, characterized in that: The heating box (13) is provided with a fixed frame (16) at the bottom. A mixer (15) is fixedly connected to the top of the fixed frame (16). A feed inlet (46) is opened on the top of the mixer (15). A fifth rotary motor (41) is installed on one side of the feed inlet (46). An electrostatic dust removal plate (14) is fixedly connected to the output end of the fifth rotary motor (41). A blower (18) communicating with the inside is installed on the front surface of the mixer (15).

7. The automated coal mixing device for coal testing according to claim 6, characterized in that: A second rotary motor (17) is mounted on the front surface of the mixer (15). The output end of the second rotary motor (17) is fixedly connected to a rotating shaft (42) located inside the mixer (15). The other end of the rotating shaft (42) is rotatably connected to one end inside the mixer (15). Multiple sets of stirring paddles (45) are fixedly connected to the outside of the rotating shaft (42). A rotating plate (43) is fixedly connected to the outside of the rotating shaft (42). Multiple sets of scrapers (44) that are in contact with the inner wall of the mixer (15) are fixedly connected to one side of the rotating plate (43).

8. The automated coal mixing device for coal testing according to claim 6, characterized in that: The bottom of the mixer (15) is provided with a third discharge port, and a third rotary motor (19) is installed on one side of the third discharge port. The output end of the third rotary motor (19) is fixedly connected to a first rotary door (20) that matches the third discharge port.

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