Automatic sampling machine for coal ash formation element analysis

Abstract

The invention relates to the technical field of sampling machines, and discloses an automatic sampling machine for coal ash element analysis, which comprises a machine body, the top of the machine body is provided with a fixedly connected feed hopper, the side wall of the machine body is provided with a rotatable cabinet door, the cabinet door is located at the lower half part of the machine body, and the machine body is internally provided with a rotatable crushing mechanism. The crushing mechanism comprises a rotatable crushing roller, fixedly connected coarse crushing teeth and slidable fine crushing teeth are uniformly arranged on the outer wall of the crushing roller, a rotatable first threaded rod and a rotatable second connecting rod are arranged in the crushing roller, and the second connecting rod is located between the first threaded rod and the crushing roller. The crushing mechanism is suitable for coal samples with different humidity.

Description

Technical Field

[0001] The present invention relates to the technical field of sample preparation machines, and particularly to an automatic sample preparation machine for coal ash element analysis. Background Art

[0002] With the development of industrial technology, coal is widely used in power plants, fertilizer plants, alcohol plants, ceramic plants, gas plants, steel plants, cement plants and other fields involving power generation, metallurgy, manufacturing, boilers and other fields. However, the quality of coal in today's market is very unstable. In order to make greater use of coal and cause less environmental pollution, coal detection and coal analysis have become indispensable links in the process of coal application. When conducting coal tests, it is necessary to crush and sample coal. Different coal samples have different moisture contents. When the moisture content in coal is relatively high, the coal is prone to agglomeration. For the agglomerated coal, it is necessary to use wider crushing teeth to reduce the adhesion of wet coal during the crushing process. When the moisture content in coal is relatively low, it is necessary to use small-sized fine crushing teeth to ensure the uniformity of crushing. In existing automatic sample preparation machines, the adjustment of the tooth shape of the crushing roller is relatively complex, which wastes a lot of labor costs. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose an automatic sample preparation machine for coal ash element analysis.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: An automatic sample preparation machine for coal ash element analysis, including a machine body. A feed hopper is fixedly connected to the top of the machine body. A rotatable cabinet door is provided on the side wall of the machine body. The cabinet door is located in the lower half of the machine body. A rotatable crushing mechanism is provided inside the machine body. The crushing mechanism includes a rotatable crushing roller. The outer wall of the crushing roller is evenly provided with fixedly connected coarse crushing teeth and slidable fine crushing teeth. A rotatable first threaded rod and a second connecting rod are provided inside the crushing roller. The second connecting rod is located between the first threaded rod and the crushing roller; A fixed connection of a blanking plate and a sixth support plate is provided inside the machine body. Filter holes are arranged in an array in the middle area of the blanking plate. Rotatable second threaded rods are symmetrically provided inside the machine body. Second threaded sliders in threaded cooperation with the second threaded rods are provided on the second threaded rods. A rotatable third rotating shaft is provided between the second threaded slider and the inner wall of the machine body. Cam cams fixedly connected symmetrically are provided on the third rotating shaft.

[0005] As a further solution of the present invention, the crushing mechanism includes symmetrically distributed first brackets. Both ends of the first brackets are fixedly connected to the inner wall of the machine body. A rotatable crushing roller is provided inside the first brackets. A slidable connecting pipe is provided outside the first threaded rod. One end of the connecting pipe is provided with a fixedly connected first threaded slider, which is in threaded cooperation with the first threaded rod. One end of the first threaded rod extending outside the crushing roller is provided with a fixedly connected first internal spline.

[0006] As a further solution of the present invention, a fixedly connected first motor is installed on the side wall of the machine body. The output end of the first motor is provided with a fixedly connected rotating pipe, which extends into the crushing roller and is slidably connected to the connecting pipe. The rotating pipe is fixedly connected to the crushing roller. A fixedly connected cleaning brush is provided on the inner wall of the first bracket. A first chute is opened at one end of the first bracket close to the cabinet door. Symmetrically arranged fixedly connected first electric cylinders are provided on the side walls of the machine body; The telescopic end of the first electric cylinder extends into the machine body and is provided with a fixedly connected first support plate. A fixedly connected second motor is installed on the top of the first support plate. A fixedly connected first connecting rod is provided on the side wall of the first support plate close to the first chute. The other end of the first connecting rod is slidably connected to the first chute. The output end of the second motor is provided with a fixedly connected first rotating shaft. A fixedly connected first external spline and a first synchronous pulley are provided on the first rotating shaft. The first synchronous pulley is located between the first external spline and the second motor.

[0007] As a further solution of the present invention, second chutes are symmetrically opened on both opposite side walls of the machine body. The second chutes are located in the upper half of the machine body. Symmetrically arranged fixedly connected second support plates, third support plates and fourth support plates are provided on both opposite side walls of the machine body. The second support plates, third support plates and fourth support plates are all located in the upper half of the machine body. The third support plate is located between the second support plate and the fourth support plate. The second support plate is close to the second chute. A rotatable second rotating shaft is provided on the second support plate. A fixedly connected first bevel gear and a second internal spline are provided on the second rotating shaft.

[0008] A slidable mounting plate is provided in the second chute. The mounting plate is hollow inside. One end of the mounting plate is slidably connected to the first rotating shaft. The first synchronous pulley is located inside the mounting plate. A rotatable second external spline is provided on the outer side wall of the mounting plate where the mounting plate is located. The rotating shaft of the second external spline extends into the mounting plate and is provided with a fixedly connected second synchronous pulley. A first synchronous belt for transmission is provided between the first synchronous pulley and the second synchronous pulley bracket.

[0009] As a further solution of the present invention, fifth support plates which are slidable are symmetrically arranged on two opposite inner walls of the machine body. The mounting plate passes through the fifth support plates. The size of the fifth support plates is larger than that of the second sliding grooves, and the fifth support plates cover the second sliding grooves. A first fixing block is fixedly connected to the bottom of the fine crushing teeth. An axially distributed first arc-shaped plate is fixedly arranged inside the crushing roller. The number of the first arc-shaped plates is less than that of the fine crushing teeth. The other end of the first fixing block is fixedly connected to the outer wall of the first arc-shaped plate.

[0010] As a further solution of the present invention, second arc-shaped plates which are axially distributed are fixedly arranged on the outer wall of the connecting pipe. A third arc-shaped plate is fixedly connected to the inner wall of the first arc-shaped plate. Second connecting rods which are rotatable are arranged in an array between the second arc-shaped plate and the third arc-shaped plate. A feeding hopper is fixedly connected to the bottom of the feeding plate. A sixth support plate is located below the feeding hopper. A classifier is fixedly arranged inside the sixth support plate. Collecting boxes which are fixedly connected are symmetrically arranged inside the machine body. The collecting boxes are located below the classifier.

[0011] As a further solution of the present invention, through grooves which are symmetrically distributed are formed in the side wall of the machine body. The third rotating shaft is slidably connected to the through grooves. A third synchronous pulley is fixedly connected to one end of the third rotating shaft passing through the machine body. A fourth synchronous pulley is fixedly arranged on the outer wall of the rotating pipe. The fourth synchronous pulley is located outside the machine body. A second synchronous belt which is transmissible is arranged between the third synchronous pulley and the fourth synchronous pulley. Second electric cylinders which are fixedly connected are symmetrically arranged on the side wall of the machine body. A rotatable tensioning pulley is arranged at the telescopic end of the second electric cylinder. The tensioning pulley abuts against the second synchronous belt.

[0012] As a further solution of the present invention, a fourth rotating shaft which is rotatable is arranged on the third support plate. A second bevel gear and a third bevel gear are fixedly connected to the upper and lower ends of the fourth rotating shaft respectively. A fifth rotating shaft which is rotatable is arranged on the fourth support plate. A fourth bevel gear and a fifth synchronous pulley are fixedly connected to the two ends of the fifth rotating shaft respectively. A sixth synchronous pulley is fixedly connected to one end of the second threaded rod passing through the outside of the machine body. A third synchronous belt which is transmissible is arranged between the fifth synchronous pulley and the sixth synchronous pulley.

[0013] The beneficial effects of the present invention are as follows: 1. The crushing mechanism is provided to be applicable to coal samples with different humidities. When the humidity of the coal is relatively high, the coal is put into the machine body from the feeding hopper. The first motor rotates to drive the crushing roller to rotate. The coarse crushing teeth on the outside of the crushing roller crush the coal, which can reduce the adhesion of wet coal during the crushing process. When the humidity of the coal is relatively low, the second motor rotates to drive the first external spline and the first synchronous pulley to rotate. The first internal spline also rotates accordingly, driving the first threaded rod to rotate. The connecting pipe also slides accordingly. The sliding of the connecting pipe drives the second connecting rod to rotate. The first fixing block also moves towards the outside of the crushing roller, driving the fine crushing teeth to move. The height of the fine crushing teeth is higher than that of the coarse crushing teeth. The adjustment is simple, which can ensure the uniformity of coal crushing. 2. An adjustable cam can assist in coal feeding. When the humidity of the coal is low, the rotation of the first synchronous pulley drives the first synchronous belt transmission, and the second synchronous pulley also drives the rotation of the second external spline. The first bevel gear also rotates accordingly, driving the rotation of the second bevel gear. The third bevel gear also rotates accordingly, driving the rotation of the fourth bevel gear. The fifth synchronous pulley also rotates accordingly, driving the third synchronous belt transmission. The sixth synchronous pulley also rotates accordingly, driving the rotation of the second threaded rod. The second threaded slider also drives the movement of the third rotating shaft accordingly. The distance between the cam and the feeding plate becomes larger, and the knocking amplitude becomes smaller, reducing the probability of clogging of the filter holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view of an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 2 is the rear view of an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 3 is the side view of an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 4 is the internal structure schematic diagram of an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 5 is the structure schematic diagram of the crushing mechanism in an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 6 is Figure 5 the enlarged schematic diagram of part A in Figure 7 is the partial structure schematic diagram of an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 8 is the internal structure schematic diagram of the crushing roller in an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 9 is the partial structure schematic diagram of the crushing roller in an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 10 is Figure 9 the enlarged schematic diagram of part B in Figure 11 is the local structure schematic diagram of an automatic sample preparation machine for coal ash element analysis proposed by the present invention; Figure 12 is Figure 11 the enlarged schematic diagram of part C in Figure 13 is Figure 11 the enlarged schematic diagram of part D in

[0015] In the figure: 1, body; 2, crushing mechanism; 3, blanking plate; 4, second threaded rod; 5, cleaning mechanism; 11, feed hopper; 12, cabinet door; 13, second chute; 14, fifth support plate; 15, sixth support plate; 16, through slot; 21, first support; 22, crushing roller; 23, first motor; 24, first external spline; 25, fourth rotating shaft; 26, first fixing block; 31, filtering hole; 32, blanking hopper; 33, second fixing block; 34, splitter; 35, collection box; 41, second threaded slider; 42, third rotating shaft; 43, cam; 44, third synchronous pulley; 45, sixth synchronous pulley; 51, third electric cylinder; 52, third connecting rod; 53, rotating seat; 54, scraper; 131, second support plate; 132, third support plate; 133, fourth support plate; 211, cleaning brush; 212, first chute; 213, first support plate; 214, second motor; 215, first connecting rod; 216, first electric cylinder; 221, coarse crushing teeth; 222, fine crushing teeth; 223, first threaded rod; 224, connecting pipe; 225, first threaded slider; 226, first internal spline; 231, rotating pipe; 232, fourth synchronous pulley; 233, second synchronous belt; 234, second electric cylinder; 235, tension pulley; 241, first synchronous pulley; 242, first synchronous belt; 243, mounting plate; 244, second synchronous pulley; 245, second external spline; 246, second internal spline; 247, second rotating shaft; 248, first bevel gear; 251, second bevel gear; 252, third bevel gear; 253, fifth rotating shaft; 254, fourth bevel gear; 255, fifth synchronous pulley; 256, third synchronous belt; 261, first arc plate; 262, third arc plate; 263, second arc plate; 264, second connecting rod. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0017] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Next, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0018] Refer to the attached Figure 1 - attached Figure 13, An automatic sample preparation machine for coal ash element analysis, comprising a machine body 1. A feed hopper 11 is fixedly connected to the top of the machine body 1. A rotatable cabinet door 12 is provided on the side wall of the machine body 1. The cabinet door 12 is located in the lower half of the machine body 1. A rotatable crushing mechanism 2 is provided inside the machine body 1. The crushing mechanism 2 includes symmetrically distributed first brackets 21. Both ends of the first brackets 21 are fixedly connected to the inner wall of the machine body 1. A rotatable crushing roller 22 is provided inside the first brackets 21.

[0019] The outer wall of the crushing roller 22 is evenly provided with fixedly connected coarse crushing teeth 221 and slidable fine crushing teeth 222. A rotatable first threaded rod 223 is provided inside the crushing roller 22. A slidable connecting pipe 224 is provided outside the first threaded rod 223. One end of the connecting pipe 224 is provided with a fixedly connected first threaded slider 225. The first threaded slider 225 is in threaded cooperation with the first threaded rod 223. One end of the first threaded rod 223 extending outside the crushing roller 22 is provided with a fixedly connected first internal spline 226. The rotation of the first internal spline 226 drives the rotation of the first threaded rod 223, and the connecting pipe 224 also slides accordingly.

[0020] A fixedly connected first motor 23 is installed on the side wall of the machine body 1. The output end of the first motor 23 is provided with a fixedly connected rotating pipe 231. The rotating pipe 231 extends into the crushing roller 22 and is slidably connected to the connecting pipe 224. The rotating pipe 231 is fixedly connected to the crushing roller 22. The rotation of the first motor 23 drives the rotation of the rotating pipe 231, and the crushing roller 22 also rotates accordingly. A fixedly connected cleaning brush 211 is provided on the inner wall of the first bracket 21. The cleaning brush 211 can clean the coarse crushing teeth 221 and the fine crushing teeth 222 to prevent coal dust from contaminating and affecting the subsequent crushing effect.

[0021] One end of the first bracket 21 close to the cabinet door 12 is provided with a first chute 212. The side walls of the machine body 1 are symmetrically provided with fixedly connected first electric cylinders 216. The telescopic end of the first electric cylinder 216 extends into the machine body 1 and is provided with a fixedly connected first support plate 213. A fixedly connected second motor 214 is installed on the top of the first support plate 213. A fixedly connected first connecting rod 215 is provided on the side wall of the first support plate 213 close to the first chute 212. The other end of the first connecting rod 215 is slidably connected to the first chute 212. The output end of the second motor 214 is provided with a fixedly connected first rotating shaft. A fixedly connected first external spline 24 and a first synchronous pulley 241 are provided on the first rotating shaft. The first synchronous pulley 241 is located between the first external spline 24 and the second motor 214. The rotation of the second motor 214 drives the synchronous rotation of the first external spline 24 and the first synchronous pulley 241. Second chutes 13 are symmetrically provided on both opposite side walls of the machine body 1. The second chutes 13 are located in the upper half of the machine body 1.

[0022] On both opposite side walls of the machine body 1, the second support plate 131, the third support plate 132 and the fourth support plate 133 which are fixedly connected are symmetrically arranged. The fourth support plate 133 is L-shaped. The second support plate 131, the third support plate 132 and the fourth support plate 133 are all located in the upper half of the machine body 1. The third support plate 132 is located between the second support plate 131 and the fourth support plate 133. The second support plate 131 is close to the second chute 13. A rotatable second rotating shaft 247 is arranged on the second support plate 131. A fixedly connected first bevel gear 248 and a second internal spline 246 are arranged on the second rotating shaft 247. The rotation of the second internal spline 246 drives the rotation of the first bevel gear 248.

[0023] A slidable mounting plate 243 is arranged in the second chute 13. The interior of the mounting plate 243 is hollow. One end of the mounting plate 243 is slidably connected to the first rotating shaft. The first synchronous pulley 241 is located inside the mounting plate 243. A rotatable second external spline 245 is arranged on the outer side wall of the machine body 1 where the mounting plate 243 is located. The rotating shaft of the second external spline 245 extends into the interior of the mounting plate 243 and is fixedly connected with a second synchronous pulley 244. A transmissible first synchronous belt 242 is arranged between the first synchronous pulley 241 and the second synchronous pulley 244. The telescopic end of the first electric cylinder 216 stretches to drive the first external spline 24 to engage with the first internal spline 226, and the second internal spline 246 engages with the second external spline 245.

[0024] Slidable fifth support plates 14 are symmetrically arranged on both opposite inner walls of the machine body 1. The mounting plate 243 passes through the fifth support plates 14. The size of the fifth support plates 14 is larger than that of the second chute 13. The fifth support plates 14 cover the second chute 13, which can prevent coal from flying out of the second chute 13. A first fixing block 26 is fixedly connected to the bottom of the fine crushing teeth 222. An axially distributed first arc plate 261 is fixedly arranged inside the crushing roller 22. The number of the first arc plates 261 is less than that of the fine crushing teeth 222. The other end of the first fixing block 26 is fixedly connected to the outer wall of the first arc plate 261. Axially distributed second arc plates 263 are fixedly arranged on the outer wall of the connecting pipe 224. A third arc plate 262 is fixedly arranged on the inner wall of the first arc plate 261. Rotatable second connecting rods 264 are arranged in an array between the second arc plates 263 and the third arc plates 262. The sliding of the connecting pipe 224 drives the rotation of the second connecting rods 264, and the first fixing block 26 also moves in the direction of the outside of the crushing roller 22 accordingly.

[0025] Inside the machine body 1, there is a fixedly connected blanking plate 3 and a sixth support plate 15. In the middle area of the blanking plate 3, there are filter holes 31 arranged in an array. At the bottom of the blanking plate 3, there is a fixedly connected blanking hopper 32. The sixth support plate 15 is located below the blanking hopper 32. Inside the sixth support plate 15, there is a fixedly connected riffler 34. Symmetrically arranged inside the machine body 1 are fixedly connected collection boxes 35, which are located below the riffler 34. Symmetrically arranged inside the machine body 1 are rotatable second threaded rods 4. On the second threaded rods 4, there are second threaded sliders 41 in threaded cooperation. Between the second threaded sliders 41 and the inner wall of the machine body 1, there are rotatable third rotating shafts 42. Symmetrically arranged on the third rotating shafts 42 are fixedly connected cams 43. The rotation of the third rotating shaft 42 drives the cams 43 to rotate, and the cams 43 strike the blanking plate 3 reciprocally, which can prevent the filter holes 31 from being blocked.

[0026] On the side wall of the machine body 1, there are symmetrically distributed through grooves 16, which are slidably connected to the third rotating shafts 42. At one end of the third rotating shaft 42 passing through the machine body 1, there is a fixedly connected third synchronous pulley 44. On the outer wall of the rotating pipe 231, there is a fixedly connected fourth synchronous pulley 232, which is located outside the machine body 1. Between the third synchronous pulley 44 and the fourth synchronous pulley 232, there is a transmissible second synchronous belt 233. Symmetrically arranged on the side wall of the machine body 1 are fixedly connected second electric cylinders 234. At the telescopic ends of the second electric cylinders 234, there are rotatable tensioning pulleys 235, which are in contact with the second synchronous belt 233, and the tension of the second synchronous belt 233 can be adjusted.

[0027] On the third support plate 132, there is a rotatable fourth rotating shaft 25. At the upper and lower ends of the fourth rotating shaft 25, there are respectively fixedly connected second bevel gears 251 and third bevel gears 252. On the fourth support plate 133, there is a rotatable fifth rotating shaft 253. At both ends of the fifth rotating shaft 253, there are respectively fixedly connected fourth bevel gears 254 and fifth synchronous pulleys 255. At one end of the second threaded rod 4 passing through the outside of the machine body 1, there is a fixedly connected sixth synchronous pulley 45. Between the fifth synchronous pulley 255 and the sixth synchronous pulley 45, there is a transmissible third synchronous belt 256. The rotation of the second motor 214 drives the second threaded rod 4 to rotate, and the position of the cam 43 also changes accordingly.

[0028] On the top of the sixth support plate 15, there are symmetrically arranged second fixing blocks 33 connected fixedly. The inside of the second fixing block 33 is hollow, and a cleaning mechanism 5 is arranged inside the second fixing block 33. The cleaning mechanism 5 includes a third electric cylinder 51. One end of the telescopic rod of the third electric cylinder 51 extending into the inside of the machine body 1 is fixedly connected with a third connecting rod 52. On the side wall of the third connecting rod 52, there are rotation seats 53 distributed in an array. Inside the rotation seat 53, there is a rotatable scraping plate 54. The scraping plate 54 is located inside the splitter 34. Inside the rotation seat 53, there is a torsion spring. When the third electric cylinder 51 stretches, it drives the scraping plate 54 to move. The scraping plate 54 can scrape the residual coal inside the splitter 34, and the upper end of the scraping plate 54 can rotate to adapt to the shape of the splitter 34.

[0029] Working principle: During use, start the first motor 23. When the humidity of the coal is relatively high, put the coal into the inside of the machine body 1 from the feed hopper 11. The first motor 23 rotates to drive the crushing roller 22 to rotate. The external coarse crushing teeth 221 of the crushing roller 22 crush the coal. At the same time, the first motor 23 rotates to drive the fourth synchronous pulley 232 to rotate, and the second synchronous belt 233 drives the third synchronous pulley 44 to rotate. The third rotating shaft 42 also rotates accordingly, driving the cam 43 to reciprocally strike the blanking plate 3, which can assist the blanking plate 3 in feeding; The crushed coal falls into the splitter 34 along the filtering holes 31 and the blanking hopper 32, and evenly falls into the collection box 35. The staff can open the cabinet door 12 to take out the coal sample in the collection box 35. Start the third electric cylinder 51. When the third electric cylinder 51 stretches, it drives the scraping plate 54 to move. The scraping plate 54 can scrape the residual coal inside the splitter 34; When the humidity of the coal is relatively low, start the first electric cylinder 216. When the first electric cylinder 216 stretches, it drives the first support plate 213 to move towards the crushing roller 22. The first external spline 24 is inserted into the first internal spline 226, and the second external spline 245 is inserted into the second internal spline 246. Start the second motor 214. The second motor 214 rotates to drive the first external spline 24 and the first synchronous pulley 241 to rotate. The first internal spline 226 also rotates accordingly, driving the first threaded rod 223 to rotate. The connecting pipe 224 also slides accordingly. The sliding of the connecting pipe 224 drives the second connecting rod 264 to rotate. The first fixing block 26 also moves towards the outside of the crushing roller 22, driving the fine crushing teeth 222 to move. The height of the fine crushing teeth 222 is higher than that of the coarse crushing teeth 221; Meanwhile, the rotation of the first synchronous pulley 241 drives the transmission of the first synchronous belt 242. The second synchronous pulley 244 also drives the rotation of the second external spline 245 accordingly. The first bevel gear 248 also rotates accordingly, driving the rotation of the second bevel gear 251. The third bevel gear 252 also rotates accordingly, driving the rotation of the fourth bevel gear 254. The fifth synchronous pulley 255 also rotates accordingly, driving the transmission of the third synchronous belt 256. The sixth synchronous pulley 45 also rotates accordingly, driving the rotation of the second threaded rod 4. The second threaded slider 41 also drives the movement of the third rotating shaft 42 accordingly. The distance between the cam 43 and the blanking plate 3 becomes larger, and the knocking amplitude becomes smaller. Start the second electric cylinder 234. The stretching of the second electric cylinder 234 drives the tension pulley 235 to abut against the second synchronous belt 233, making the second synchronous belt 233 in a tensioned state. After the positions of the fine crushing teeth 222 and the cam 43 are adjusted, the telescopic rod of the first electric cylinder 216 compresses, separating the first external spline 24 from the first internal spline 226, and separating the second external spline 245 from the second internal spline 246.

[0030] From the above description, it can be seen that in the above embodiment of the present invention, the rotation of the first synchronous pulley 241 drives the rotation of the second threaded rod 4. The second threaded slider 41 also drives the movement of the third rotating shaft 42 accordingly. The distance between the cam 43 and the blanking plate 3 can be adjusted according to the humidity of the coal, reducing the probability of blockage of the filter holes 31. The coarse crushing teeth 221 and the fine crushing teeth 222 can be adjusted according to the humidity of the coal, reducing the adhesion of wet coal during the crushing process and the uniformity of coal crushing.

[0031] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic sample preparation machine for coal ash element analysis, comprising a machine body (1), characterized in that: The top of the machine body (1) is provided with a fixedly connected feed hopper (11), the side wall of the machine body (1) is provided with a rotatable cabinet door (12), the cabinet door (12) is located at the lower half of the machine body (1), and a rotatable crushing mechanism (2) is provided inside the machine body (1), the crushing mechanism (2) comprises a rotatable crushing roller (22), the outer wall of the crushing roller (22) is evenly provided with fixedly connected coarse crushing teeth (221) and slidable fine crushing teeth (222), and the crushing roller (22) is provided with a rotatable first threaded rod (223) and a second connecting rod (264), and the second connecting rod (264) is located between the first threaded rod (223) and the crushing roller (22); The machine body (1) is provided with a feed plate (3) and a sixth support plate (15) fixedly connected thereto, the feed plate (3) is provided with an array of filter holes (31) in the middle region, a rotatable second threaded rod (4) is symmetrically provided therein, a second threaded slider (41) threadably matched is provided on the second threaded rod (4), a rotatable third rotating shaft (42) is provided between the second threaded slider (41) and the inner wall of the machine body (1), and a cam (43) fixedly connected thereto is symmetrically provided on the third rotating shaft (42).

2. The automatic sample preparation machine for coal ash element analysis according to claim 1, characterized in that: The crushing mechanism (2) comprises a symmetrically distributed first bracket (21), both ends of the first bracket (21) are fixedly connected to the inner wall of the body (1), a rotatable crushing roller (22) is arranged inside the first bracket (21), a slidable connecting pipe (224) is arranged outside the first threaded rod (223), one end of the connecting pipe (224) is provided with a fixedly connected first threaded slider (225), the first threaded slider (225) is threadedly matched with the first threaded rod (223), and one end of the first threaded rod (223) extending to the outside of the crushing roller (22) is provided with a fixedly connected first internal spline (226).

3. The automatic sample preparation machine for coal ash element analysis according to claim 2, characterized in that: A first motor (23) is fixedly mounted on the side wall of the machine body (1); a rotating tube (231) is fixedly mounted on the output end of the first motor (23); the rotating tube (231) extends into the interior of the crushing roller (22) and is slidably connected to the connecting tube (224); the rotating tube (231) is fixedly connected to the crushing roller (22); a cleaning brush (211) is fixedly mounted on the inner wall of the first bracket (21); a first sliding groove (212) is formed at one end of the first bracket (21) close to the cabinet door (12); and a first electric cylinder (216) is symmetrically fixedly mounted on the side wall of the machine body (1); The telescopic end of the first electric cylinder (216) extends to the inside of the machine body (1) and is provided with a fixedly connected first support plate (213); a fixedly connected second motor (214) is installed on the top of the first support plate (213); a fixedly connected first connecting rod (215) is provided on the side wall of the first support plate (213) close to the first slide groove (212); the other end of the first connecting rod (215) is slidably connected to the first slide groove (212); a fixedly connected first rotating shaft is provided at the output end of the second motor (214); a fixedly connected first external spline (24) and a first synchronous wheel (241) are provided on the first rotating shaft; and the first synchronous wheel (241) is located between the first external spline (24) and the second motor (214).

4. The automatic sample preparation machine for coal ash element analysis according to claim 1, characterized in that: The two opposite side walls of the body (1) are symmetrically provided with second slide grooves (13), the second slide grooves (13) are located at the upper part of the body (1), the two opposite side walls of the body (1) are symmetrically provided with a second support plate (131), a third support plate (132) and a fourth support plate (133) which are fixedly connected, the second support plate (131), the third support plate (132) and the fourth support plate (133) are all located at the upper part of the body (1), the third support plate (132) is located between the second support plate (131) and the fourth support plate (133), the second support plate (131) is close to the second slide groove (13), the second support plate (131) is provided with a rotatable second shaft (247), and the second shaft (247) is provided with a first bevel gear (248) and a second internal spline (246) which are fixedly connected.

5. The automatic sample preparation machine for coal ash element analysis according to claim 4, characterized in that: A slidable mounting plate (243) is provided in the second slide groove (13), the mounting plate (243) is hollow inside, one end of the mounting plate (243) is slidably connected to the first rotating shaft, the first synchronous wheel (241) is located inside the mounting plate (243), the mounting plate (243) is located on the outer side wall of the body (1) and is provided with a rotatable second external spline (245), the rotating shaft of the second external spline (245) extends to the inside of the mounting plate (243) and is provided with a fixedly connected second synchronous wheel (244), and the first synchronous wheel (241) and the second synchronous wheel (244) bracket are provided with a transmittable first synchronous belt (242).

6. The automatic sample preparation machine for coal ash element analysis according to claim 5, characterized in that: The two opposite inner walls of the machine body (1) are symmetrically provided with a slidable fifth support plate (14), the mounting plate (243) passes through the fifth support plate (14), the size of the fifth support plate (14) is larger than the second slide groove (13), the fifth support plate (14) covers the second slide groove (13), a first fixed block (26) is fixedly connected to the bottom of the fine crushing teeth (222), an axially distributed first arc plate (261) is fixedly provided inside the crushing roller (22), the number of the first arc plates (261) is less than the number of the fine crushing teeth (222), and the other end of the first fixed block (26) is fixedly connected to the outer wall of the first arc plate (261).

7. The automatic sample preparation machine for coal ash element analysis according to claim 2, characterized in that: The outer wall of the connecting pipe (224) is fixedly provided with an axially distributed second arc plate (263), the inner wall of the first arc plate (261) is provided with a fixedly connected third arc plate (262), a rotatable second connecting rod (264) is arranged in an array between the second arc plate (263) and the third arc plate (262), a fixedly connected lower hopper (32) is provided at the bottom of the lowering plate (3), a sixth support plate (15) is located below the lower hopper (32), a fixedly connected reducer (34) is provided inside the sixth support plate (15), and a fixedly connected collecting box (35) is symmetrically provided inside the machine body (1), and the collecting box (35) is located below the reducer (34).

8. The automatic sample preparation machine for coal ash element analysis according to claim 1, characterized in that: The side wall of the machine body (1) is provided with symmetrically distributed through grooves (16), the through grooves (16) are slidably connected to the third rotating shaft (42), one end of the third rotating shaft (42) passing through the machine body (1) is provided with a fixedly connected third synchronous wheel (44), the outer wall of the rotating tube (231) is provided with a fixedly connected fourth synchronous wheel (232), the fourth synchronous wheel (232) is located outside the machine body (1), a second synchronous belt (233) that can be transmitted is provided between the third synchronous wheel (44) and the fourth synchronous wheel (232), and a second electric cylinder (234) that is fixedly connected is symmetrically provided on the side wall of the machine body (1), a rotatable tensioning wheel (235) is provided at the telescopic end of the second electric cylinder (234), and the tensioning wheel (235) is in contact with the second synchronous belt (233).

9. The automatic sample preparation machine for coal ash element analysis according to claim 4, characterized in that: The third support plate (132) is provided with a rotatable fourth rotating shaft (25), and the upper and lower ends of the fourth rotating shaft (25) are respectively provided with a second bevel gear (251) and a third bevel gear (252) which are fixedly connected. The fourth support plate (133) is provided with a fifth rotatable rotating shaft (253), and the two ends of the fifth rotating shaft (253) are respectively provided with a fourth bevel gear (254) and a fifth synchronous wheel (255) which are fixedly connected. One end of the second threaded rod (4) passing through the outside of the machine body (1) is provided with a sixth synchronous wheel (45) which is fixedly connected. A third synchronous belt (256) which can transmit light is provided between the fifth synchronous wheel (255) and the sixth synchronous wheel (45).

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