Crushing device for rock sample for component detection

Abstract

The invention relates to the technical field of rock sample crushing, and discloses a crushing device for a rock sample for component detection, the crushing device comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a shell, the shell is internally and fixedly connected with a partition plate for dividing the shell into two spaces, and the positions, located on the two sides of the partition plate, of the top of the shell are fixedly connected with feeding pipes; a sealing cover is clamped to the top end of the feeding pipe, two crushing rollers are rotationally connected to the positions, located on the two sides of the partition plate, in the shell through bearings, and a power assembly for driving the two crushing rollers to crush the rock sample is arranged on the outer wall of one side of the shell. The crushing device can prevent particles generated during crushing from splashing to injure workers and prevent dust from influencing the body health of operators, can prevent crushed rock samples from blocking a sieve plate, improves the screening speed of the sieve plate on crushed materials, can also collect the rock samples on the sieve plate and the rock samples screened by the sieve plate in a classified manner, and improves the crushing efficiency. And the use convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rock sample crushing, and in particular to a rock sample crushing device for component detection. Background Art

[0002] Among the "five major disasters" in coal mines (water, fire, gas, roof collapse, and coal dust), water disaster ranks first. Once a water disaster occurs, it will threaten the safe production of coal mines at the least, and cause casualties and mine shutdown at the worst. The mining of coal resources is seriously threatened by water disasters, especially with the extension of mine mining levels and the increase of mining intensity, the problem of mine water disasters has become increasingly prominent. When mining a mine, it is necessary to conduct elemental testing on the underground rock strata to ensure whether the area is suitable for mine mining.

[0003] When testing the components in rock samples, the rock samples need to be crushed to a certain fineness in advance. At present, when the crushing machinery used crushes the rock samples, rock particles are easy to splash, which may cause injury to people and is inconvenient to use. In addition, the dust generated during the crushing process is large, which seriously endangers the health of the machine operators. In addition, the filter screen is easy to be clogged during filtration, affecting the filtration speed. In order to better deal with the above problems, promote the development of industry technology level, and improve core competitiveness, this application proposes a new composition structure that is different from the existing technology. Summary of the Invention

[0004] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a crushing device for rock samples for component detection, which is mainly used to solve the problems that when the existing crushing machinery is crushing rock samples, rock particles are easily splashed, which may cause injury to people and is inconvenient to use. In addition, the dust generated during the crushing process is large, which seriously endangers the health of the machine operators. In addition, the filter screen is easily clogged during filtration, affecting the filtration speed.

[0005] (2) Technical solution In order to achieve the above object, the present invention adopts the following technical solutions: A rock sample crushing device for component detection comprises a base plate, the upper surface of the base plate is fixedly connected to a shell, a partition is fixedly connected inside the shell for dividing the shell into two spaces, a feed pipe is fixedly connected to the top of the shell at positions on both sides of the partition, a sealing cover is clamped on the top of the feed pipe, two crushing rollers are rotatably connected to the positions on both sides of the partition in the shell through bearings, a power component for driving the two crushing rollers to crush the rock sample is provided on the outer wall of one side of the shell, an ash suction component for extracting dust when the rock sample is crushed is provided on the top outer wall of the shell, a screening component for screening the crushed rock sample is provided at a position below the crushing roller in the shell, two discharge ports are provided on one side of the shell, and a material collecting component for collecting material discharged from the discharge port is provided on one side of the shell.

[0006] Furthermore, the power assembly includes a support plate, which is fixedly connected to the outer wall of one side of the shell, a shock-absorbing pad is provided between the support plate and the motor, the upper surface of the support plate is fixedly connected to the motor, the outer key of the motor output shaft is connected to sprocket 1, one end of each of the multiple crushing rollers is connected to a gear through the shell key, and two adjacent gears are meshed with each other, and the outer sides of two of the crushing rollers are keyed to sprocket 2 at positions outside the shell, and a synchronous belt is wound around the two sprockets 2 and sprocket 1.

[0007] On the basis of the above-mentioned scheme, the screening assembly includes two inclined sieve plates, and the two sieve plates are arranged at positions on both sides of the partition in the shell. The positions on both sides of the partition in the shell are fixedly connected with multiple fixed plates for supporting the sieve plates. The upper surface of the fixed plate is fixedly connected with a guide rod, and the guide rod passes through the sieve plate. The top of the guide rod is fixedly connected with a baffle. The position below the sieve plate in the shell is rotatably connected with a rotating shaft through a bearing. Two cams of different sizes are fixedly connected to the outside of the rotating shaft. A linkage assembly for driving the rotating shaft to rotate is provided in the partition.

[0008] As a further solution of the present invention, the linkage assembly includes a connecting shaft, a rotating hole is opened in the partition, the connecting shaft is rotatably connected in the rotating hole, one end of the connecting shaft passes through the shell and is fixed to the output shaft of the motor, the other end of the connecting shaft passes through the shell key and is connected to pulley 1, one end of the rotating shaft passes through the shell key and is connected to pulley 2, and the two pulleys 2 are connected to pulley 1 through belt transmission.

[0009] Furthermore, the material receiving assembly includes two mounting frames, both of which are fixedly connected to the outer wall of one side of the shell, and the two mounting frames are respectively located below the two discharge ports. A material receiving box is placed in each of the two mounting frames, and a feed port connected to the discharge port is opened on one side of the material receiving box. A material guide plate is fixedly connected to one side of the screen plate, and the material guide plate extends into the material receiving box through the discharge port and the feed port.

[0010] On the basis of the above-mentioned solution, elastic balls are fixedly connected to the inner walls on both sides of the mounting frame, and slots are provided on the outer walls on both sides of the material receiving box, and the elastic balls are engaged with the slots.

[0011] As a further solution of the present invention, the ash suction assembly includes an air pump, which is fixedly connected to the top outer wall of the shell, and the top outer wall of the shell is fixedly connected to a dust box at a position between the two feed pipes. One end of the air inlet of the air pump is connected to the ash box through a pipe, and both sides of the ash box are fixedly connected to connecting pipes connected to the feed pipe. A filter plate is fixedly connected inside the ash box, and the top of the ash box is hinged with a cover plate by a spring hinge, and the bottom of the cover plate is fixedly connected to a sealing gasket.

[0012] Furthermore, a collection box is provided at both sides of the partition in the shell, and the collection box is located below the screen plate.

[0013] (3) Beneficial effects Compared with the prior art, the present invention provides a rock sample crushing device for component detection, which has the following beneficial effects: 1. The present invention uses a feed pipe, a cover and an ash suction component in combination to add the rock sample into the feed pipe, which is then sealed by the cover, and then the rock sample is crushed by the crushing roller. At this time, the particles generated during the crushing can be prevented from splashing and causing damage to the workers. At the same time, the ash suction component will absorb the dust generated by the crushing during the crushing process, thereby preventing the dust from affecting the health of the operator.

[0014] 2. The present invention provides a screening assembly, which can vibrate and screen the crushed rock sample, thereby preventing the crushed rock sample from blocking the screen plate and improving the screening speed of the screen plate for the crushed material.

[0015] 3. The material collecting component and the material collecting box of the present invention are used in combination. The material collecting component can collect the material on the sieve plate, and the material collecting box can collect the sieved material, thereby facilitating the classification and collection of rock samples on the sieve plate and rock samples sieved by the sieve plate, thereby improving the convenience of use.

[0016] 4. The present invention divides the shell into two spaces by a partition, and both spaces are provided with crushing rollers, so that two different rock samples can be crushed simultaneously, thereby improving the crushing efficiency of the test rock samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front perspective schematic diagram of a rock sample crushing device for component detection proposed by the present invention; Figure 2 This is a schematic diagram of the rear side three-dimensional structure of a rock sample crushing device for component detection proposed by the present invention; Figure 3 This is a schematic diagram of the partial cross-sectional structure of a rock sample crushing device for component detection proposed by the present invention.

[0018] Figure 4 This is a schematic diagram of an enlarged cross-sectional structure of an ash suction component of a rock sample crushing device for component detection proposed by the present invention; Figure 5 This is an enlarged cross-sectional structural diagram of a material receiving assembly of a rock sample crushing device for component detection proposed by the present invention; Figure 6 This is a partially enlarged structural schematic diagram of a rock sample crushing device for component detection proposed by the present invention; Figure 7 This is a schematic diagram of the enlarged structure of the screening component of a rock sample crushing device for component detection proposed by the present invention.

[0019] In the figure: 1. Base plate; 2. Shell; 3. Feed pipe; 4. Sealing cover; 5. Ash suction assembly; 6. Synchronous belt; 7. Gear; 8. Sprocket 1; 9. Motor; 10. Collecting assembly; 11. Shock pad; 12. Support plate; 13. Partition; 14. Crushing roller; 15. Discharge port; 16. Screening assembly; 17. Ash collection box; 18. Air pump; 19. Cover plate; 20. Filter plate; 21. Connecting pipe; 22. Mounting frame; 23. Collecting box; 24. Elastic ball; 25. Slot; 26. Feed port; 27. Connecting shaft; 28. Pulley 1; 29. ​​Pulley 2; 30. Rotating shaft; 31. Cam; 32. Screen plate; 33. Fixed plate; 34. Guide plate; 35. Guide rod; 36. Collecting box; 37. Sprocket 2. DETAILED DESCRIPTION

[0020] 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. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Reference Figure 1-Figure 7 The hopper 14 is a kind of hopper 1 that is used for the hopper of the present invention, and the hopper 14 is a kind of hopper 1 that is used for the hopper of the present invention. In the present invention, a power assembly for driving two crushing rollers 14 to crush the rock sample is provided on the outer wall of one side of the shell 2. The power assembly includes a support plate 12, which is welded to the outer wall of one side of the shell 2. A shock-absorbing pad 11 is provided between the support plate 12 and the motor 9. The upper surface of the support plate 12 is fixed with the motor 9 by bolts. The outer key of the output shaft of the motor 9 is connected to the sprocket 8. One end of each of the multiple crushing rollers 14 is connected to the gear 7 through the shell 2. The adjacent two gears 7 are meshed with each other. The outer sides of the two crushing rollers 14 are located at The positions outside the housing 2 are all connected with sprocket 2 37 by keys, and a synchronous belt 6 is wound between the two sprockets 2 37 and the sprocket 1 8. When crushing is required, the motor 9 is started, and the motor 9 drives the sprocket 1 8 to rotate. The sprocket 1 8 drives the sprocket 2 37 to rotate through the synchronous belt 6. The sprocket 2 37 drives the crushing roller 14 connected thereto to rotate, and the crushing roller 14 drives the gear 7 connected thereto to rotate. The mutual engagement between the gears 7 causes the two adjacent crushing rollers 14 to rotate in opposite directions, so that the crushing rollers 14 crush the rock sample. In the present invention, the top outer wall of the shell 2 is provided with an ash suction component 5 for extracting dust when the rock sample is crushed. The ash suction component 5 includes an air pump 18, which is fixed to the top outer wall of the shell 2 by bolts. The top outer wall of the shell 2 is located between the two feed pipes 3 and is fixed with an ash box 17 by bolts. One end of the air inlet of the air pump 18 is connected to the ash box 17 through a pipeline. Connecting pipes 21 connected to the feed pipe 3 are welded on both sides of the ash box 17. A filter plate 20 is fixed in the ash box 17 by bolts. The top of the ash box 17 is hinged with a cover plate 19 by a spring hinge. A sealing gasket is bonded to the bottom of the cover plate 19. During the crushing process, the air pump 18 is started to extract air. At this time, since the connecting pipe 21 on the ash collecting box 17 is connected to the feeding pipe 3, the dust generated during the crushing will be extracted into the ash collecting box 17, and the filter plate 20 in the ash collecting box 17 will filter the dust, so that the dust cannot enter the air pump 18, so that the dust is accumulated in the ash collecting box 17, thereby absorbing the dust generated by the crushing, and preventing the dust from affecting the health of the operator. The cover plate 19 is tightly fitted with the ash collecting box 17 by the elastic force of the spring hinge, and the cover plate 19 and the ash collecting box 17 are sealed by a sealing gasket to prevent dust leakage. At the same time, the cover plate 19 can be opened by the spring hinge, so that the dust in the ash collecting box 17 can be cleaned; In the present invention, a screening assembly 16 for screening the crushed rock sample is provided at a position below the crushing roller 14 in the housing 2. The screening assembly 16 includes two inclined screen plates 32. The two screen plates 32 are provided at positions on both sides of the partition 13 in the housing 2. A plurality of fixing plates 33 for supporting the screen plates 32 are welded at positions on both sides of the partition 13 in the housing 2. A guide rod 35 is welded to the upper surface of the fixing plate 33, and the guide rod 35 passes through the screen plate 32. A baffle is welded to the top of the guide rod 35. , the position below the sieve plate 32 in the housing 2 is rotatably connected to a rotating shaft 30 through a bearing. Two cams 31 of different sizes are welded to the outside of the rotating shaft 30. A linkage component for driving the rotating shaft 30 to rotate is provided in the partition 13. The linkage component includes a connecting shaft 27. A rotating hole is opened in the partition 13. The connecting shaft 27 is rotatably connected in the rotating hole. One end of the connecting shaft 27 passes through the housing 2 and is fixed to the output shaft of the motor 9. The other end of the connecting shaft 27 passes through the housing 2 and is connected to a pulley 28. One end of the rotating shaft 30 A pulley 29 is connected through the housing 2, and the two pulleys 29 are connected to the pulley 1 28 through a belt transmission. The rock sample crushed by the crushing roller 14 will fall downward, causing the rock sample to fall onto the screen plate 32, and the screen plate 32 will screen the crushed rock sample. In the process of the rotation of the motor 9, the connecting shaft 27 will be driven to rotate, and the connecting shaft 27 will drive the pulley 1 28 to rotate. The pulley 1 28 will drive the two pulleys 29 to rotate through the belt, and the two pulleys 29 will drive the rotating shaft 30 to rotate, and the rotating shaft 30 will drive The cam 31 rotates, and during the rotation process, the cam 31 pushes the screen plate 32 to move upward along the guide rod 35 through its own raised part. When the cam 31 rotates until the raised part is out of contact with the screen plate 32, the screen plate 32 falls downward due to gravity until it contacts the fixed plate 33, so that the fixed plate 33 supports the screen plate 32. This cycle is repeated, so that the screen plate 32 vibrates and screens the crushed rock sample, preventing the crushed rock sample from blocking the screen plate 32, thereby improving the screening speed of the screen plate 32 for the crushed material; In the present invention, one side of the shell 2 is provided with two discharge ports 15, and one side of the shell 2 is provided with a material receiving assembly 10 for collecting the material discharged from the discharge port 15. The material receiving assembly 10 includes two mounting brackets 22, and the two mounting brackets 22 are welded to the outer wall of one side of the shell 2. The two mounting brackets 22 are respectively located below the two discharge ports 15. A material receiving box 23 is placed in each of the two mounting brackets 22. A feed port 26 connected to the discharge port 15 is provided on one side of the material receiving box 23. A guide plate 34 is welded on one side of the sieve plate 32, and the guide plate 34 extends into the material receiving box 23 through the discharge port 15 and the feed port 26. Since the sieve plate 3 2. The rock samples are vibrated and screened. At the same time, the sieve plate 32 is tilted. Therefore, during the screening process of the sieve plate 32, the rock samples remaining on the sieve plate 32 will be moved, and the rock samples remaining on the sieve plate 32 will enter the material receiving box 23 through the material guide plate 34. The material receiving box 23 collects the rock samples remaining on the sieve plate 32. Elastic balls 24 are bonded to the inner walls of both sides of the mounting frame 22. Card slots 25 are provided on the outer walls of both sides of the material receiving box 23. The elastic balls 24 are engaged with the card slots 25. The engagement of the elastic balls 24 with the card slots 25 can assist in fixing the material receiving box 23, so that the material receiving box 23 will not move easily. In the present invention, a collection box 36 is provided at the positions on both sides of the partition 13 in the shell 2, and the collection box 36 is located below the sieve plate 32. The rock samples screened by the sieve plate 32 will fall into the collection box 36, so that the collection box 36 collects the rock samples screened by the sieve plate 32, thereby facilitating the classification and collection of the rock samples on the sieve plate 32 and the rock samples screened by the sieve plate 32, thereby improving the convenience of use.

[0022] Working principle: when in use, open the cover 4 on the feed pipe 3, and then add the rock sample into the feed pipe 3. After adding, use the cover 4 to close the feed pipe 3, and then start the motor 9. The motor 9 drives the sprocket 1 8 to rotate. The sprocket 1 8 drives the sprocket 2 37 to rotate through the synchronous belt 6. The sprocket 2 37 will drive the crushing roller 14 connected thereto to rotate. The crushing roller 14 will drive the gear 7 connected thereto to rotate. The mutual engagement between the gears 7 will cause the two adjacent crushing rollers 14 to rotate in opposite directions, so that the crushing rollers 14 crush the rock sample. At this time, since the cover 4 closes the feed pipe 3, it can avoid the particles generated during the crushing from splashing and causing damage to the staff. During the crushing process, the air pump 18 is started to pump air. At this time, since the connecting pipe 21 on the dust collecting box 17 is connected to the feeding pipe 3, the dust generated during the crushing will be sucked into the dust collecting box 17. The filter plate 20 in the dust collecting box 17 will filter the dust, so that the dust cannot enter the air pump 18, so that the dust is accumulated in the dust collecting box 17, thereby absorbing the dust generated by the crushing and preventing the dust from affecting the health of the operator. The rock sample crushed by the crushing roller 14 will fall downward, causing the rock sample to fall onto the sieve plate 32, and the sieve plate 32 will screen the crushed rock sample. In the process of rotation of the motor 9, the connecting shaft 27 will be driven to rotate, and the connecting shaft 27 will drive the pulley 1 28 to rotate. The pulley 1 28 will drive the two pulleys 29 to rotate through the belt, and the two pulleys 29 will drive the rotating shaft 30 to rotate. The rotating shaft 30 will drive the cam 31 to rotate. In the process of rotation, the cam 31 will push the sieve plate 32 upward along the guide rod 35 through its own raised part. When the cam 31 rotates until the raised part is out of contact with the sieve plate 32, the sieve plate 32 will fall downward by gravity until it contacts the fixed plate 33, so that the fixed plate 33 supports the sieve plate 32, and so on. The cycle is repeated, so that the sieve plate 32 vibrates and screens the crushed rock sample, thereby preventing the crushed rock sample from blocking the sieve plate 32, thereby improving the screening speed of the sieve plate 32 for the crushed material. Since the sieve plate 32 vibrates and screens the rock samples, and the sieve plate 32 is tilted, the rock samples remaining on the sieve plate 32 will be moved during the screening process of the sieve plate 32, so that the rock samples remaining on the sieve plate 32 enter the material collecting box 23 through the material guide plate 34, so that the material collecting box 23 collects the rock samples remaining on the sieve plate 32, and the rock samples screened by the sieve plate 32 will fall into the collection box 36, so that the collection box 36 collects the rock samples screened by the sieve plate 32, thereby facilitating the classification and collection of the rock samples on the sieve plate 32 and the rock samples screened by the sieve plate 32, thereby improving the convenience of use.

[0023] In the description herein, it should be noted that relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0024] In addition, while embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rock sample crushing device for component detection, comprising a bottom plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a shell (2), a partition (13) is fixedly connected inside the shell (2) for dividing the shell (2) into two spaces, a feed pipe (3) is fixedly connected to the top of the shell (2) at positions on both sides of the partition (13), a cover (4) is clamped at the top of the feed pipe (3), two crushing rollers (14) are rotatably connected to positions on both sides of the partition (13) inside the shell (2) through bearings, a power component is provided on the outer wall of one side of the shell (2), an ash suction component (5) is provided on the outer wall of the top of the shell (2), a screening component (16) is provided at a position below the crushing roller (14) inside the shell (2), two discharge ports (15) are opened on one side of the shell (2), and a material receiving component (10) is provided on one side of the shell (2).

2. A rock sample crushing device for component detection according to claim 1, characterized in that: The power assembly includes a support plate (12), the support plate (12) is fixedly connected to the outer wall of one side of the shell (2), a shock-absorbing pad (11) is provided between the support plate (12) and the motor (9), the upper surface of the support plate (12) is fixedly connected to the motor (9), the outer side of the output shaft of the motor (9) is keyed to a sprocket (8), one end of each of the plurality of crushing rollers (14) passes through the shell (2) and is keyed to a gear (7), two adjacent gears (7) are meshed with each other, wherein the outer sides of two crushing rollers (14) located outside the shell (2) are keyed to a sprocket (37), and a synchronous belt (6) is wound between the two sprockets (37) and the sprocket (8).

3. A rock sample crushing device for component detection according to claim 2, characterized in that: The screening assembly (16) comprises two inclined sieve plates (32), the two sieve plates (32) being arranged in positions on both sides of the partition (13) in the housing (2), a plurality of fixed plates (33) supporting the sieve plates (32) being fixedly connected to the positions on both sides of the partition (13) in the housing (2), a guide rod (35) being fixedly connected to the upper surface of the fixed plate (33), and the guide rod (35) passing through the sieve plate (32), a baffle being fixedly connected to the top end of the guide rod (35), a rotating shaft (30) being rotatably connected to the position below the sieve plate (32) in the housing (2) via a bearing, two cams (31) of different sizes being fixedly connected to the outer side of the rotating shaft (30), and a linkage assembly being provided in the partition (13).

4. A rock sample crushing device for component detection according to claim 3, characterized in that: The linkage assembly includes a connecting shaft (27), a rotating hole is opened in the partition (13), and the connecting shaft (27) is rotatably connected in the rotating hole. One end of the connecting shaft (27) passes through the shell (2) and is fixed to the output shaft of the motor (9). The other end of the connecting shaft (27) passes through the shell (2) and is key-connected to a pulley 1 (28). One end of the rotating shaft (30) passes through the shell (2) and is key-connected to a pulley 2 (29). The two pulleys 2 (29) are connected to the pulley 1 (28) through a belt transmission.

5. The rock sample crushing device for component detection according to claim 3, characterized in that: The material receiving assembly (10) includes two mounting frames (22), both of which are fixedly connected to the outer wall of one side of the shell (2), and the two mounting frames (22) are respectively located below the two discharge ports (15). A material receiving box (23) is placed in each of the two mounting frames (22), and a feed port (26) connected to the discharge port (15) is provided on one side of the material receiving box (23). A material guide plate (34) is fixedly connected to one side of the screen plate (32), and the material guide plate (34) passes through the discharge port (15) and the feed port (26) and extends into the material receiving box (23).

6. A rock sample crushing device for component detection according to claim 5, characterized in that: Elastic balls (24) are fixedly connected to the inner walls on both sides of the mounting frame (22), and clamping grooves (25) are provided on the outer walls on both sides of the material receiving box (23), and the elastic balls (24) are clamped to the clamping grooves (25).

7. A rock sample crushing device for component detection according to claim 1, characterized in that: The ash suction assembly (5) includes an air pump (18), which is fixedly connected to the top outer wall of the shell (2), and the top outer wall of the shell (2) is fixedly connected to an ash box (17) at a position between the two feed pipes (3). One end of the air inlet of the air pump (18) is connected to the ash box (17) through a pipeline, and both sides of the ash box (17) are fixedly connected to connecting pipes (21) connected to the feed pipes (3). A filter plate (20) is fixedly connected to the inside of the ash box (17), and the top of the ash box (17) is hinged to a cover plate (19) through a spring hinge, and the bottom of the cover plate (19) is fixedly connected to a sealing gasket.

8. The rock sample crushing device for component detection according to claim 3, characterized in that: A material collection box (36) is provided at positions on both sides of the partition plate (13) in the housing (2), and the material collection box (36) is located below the screen plate (32).

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