A screening device for briquettes

Abstract

The present application relates to the technical field of coal briquette crushing, and discloses a screening device for coal briquette conveying, which comprises a box body provided with an inlet and an outlet, and a screening mechanism arranged in the box body; the screening mechanism comprises a first screening plate, a collecting box with an open top, and a plurality of crushing assemblies arranged along the length direction of the first screening plate; the first screening plate is arranged obliquely and fixed to the box body; the collecting box is fixed to the box body and located at one end of the first screening plate close to the bottom of the box body; each crushing assembly comprises a moving block, a linkage block, a plurality of conical blocks, and a driving part for driving the moving block to make vertical reciprocating motion; the moving block is slidably connected to the box body; the linkage block is fixed to the moving block; each conical block is fixed to the linkage block, and the first screening plate is located on the motion track of the conical blocks; the moving directions of adjacent two moving blocks are opposite. The screening device can solve the problem that the existing crushing device cannot clean and collect the impurities remaining on the screen.

Description

Technical Field

[0001] This invention relates to the field of coal crushing technology, and more specifically to a screening device for coal conveying. Background Technology

[0002] Existing screening devices can only screen coal blocks. Since coal blocks need to be crushed after screening, existing screening devices cannot quickly crush coal blocks before screening. Furthermore, after long-term screening, coal blocks tend to accumulate on the screening plate, preventing them from falling onto the conveyor for transport, resulting in low screening efficiency.

[0003] To address the aforementioned problems, Chinese Patent Publication No. CN218590780U discloses a sieving coal powder crushing device, comprising a crushing box, a feed chamber, a temporary storage chamber, a guide hopper, and crushing rollers. A cover plate is hinged to the top of the feed hopper. A support plate is fixedly installed on one side of the top of the crushing box. An electric push rod is rotatably mounted between the support plate and the cover plate. A screen is inclinedly arranged inside the crushing box below the crushing rollers. A first motor is fixedly installed on one side of the crushing box, and the output end of the first motor extends into the crushing box and is fixedly connected to a cam, which contacts the bottom of the screen. This device can rapidly crush coal lumps through the crushing rollers, and through the combined action of the first motor, the cam, and the spring, the screen can vibrate, reducing coal lumps accumulating on the screen and improving screening efficiency.

[0004] The above-mentioned device has the following problems in actual use: The device first crushes the coal blocks with crushing rollers and then screens the coal powder through a screen. However, since the freshly mined coal blocks contain a lot of impurities, and the screen can only screen coal powder, the impurities will still remain on the screen. The device cannot clean and collect the impurities remaining on the screen. Over time, the impurities remaining on the screen will increase, which will eventually clog the screen, making it impossible for the screen to screen coal powder. In other words, the screening work cannot be carried out normally. Summary of the Invention

[0005] This invention provides a screening device for conveying coal blocks to solve the problem that existing crushing devices cannot clean and collect impurities remaining on the screen.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a screening device for conveying coal blocks, comprising a box with an inlet and an outlet, and a screening mechanism disposed within the box; the screening mechanism comprises a first screening plate, a collection box with an opening at the top, and a plurality of crushing components disposed along the length of the first screening plate; the first screening plate is inclined and fixedly connected to the box; the collection box is fixedly connected to the box and is located at one end of the first screening plate near the bottom of the box; the crushing components comprise a moving block, a linkage block, a plurality of conical blocks, and a drive unit for driving the moving block to perform vertical reciprocating motion; the moving block is slidably connected to the box; the linkage block is fixedly connected to the moving block; the plurality of conical blocks are all fixedly connected to the bottom of the linkage block; the movement directions of two adjacent moving blocks are opposite.

[0007] The principle and advantages of this scheme are:

[0008] 1. After the coal block enters the first screening plate through the feed inlet, due to the inclined setting of the first screening plate, the coal block can move towards the collection box along the length of the first screening plate. During the movement of the coal block, the driving unit drives the moving block to make vertical reciprocating motion. During the movement of the moving block, the linkage block moves synchronously. During the movement of the linkage block, the conical block moves synchronously. During the movement of the conical block, the conical block can perform preliminary crushing of the coal block, realizing coarse processing, so that the coal block is separated from impurities. After the coal block is crushed, it falls through the first screening plate, preparing for further crushing of the coal block. Meanwhile, the impurities move towards the collection box along the length of the first screening plate and finally fall into the collection box, completing the cleaning and collection of impurities.

[0009] 2. Because the first screening plate is located on the trajectory of the conical block, the conical block can continuously collide with the first screening plate, causing the first screening plate to vibrate. During the vibration of the first screening plate, on the one hand, it can cause the coal particles blocked in the screening holes of the first screening plate to move vertically back and forth, eventually falling to a certain place on the first screening plate, thereby changing the position of the coal particles on the first screening plate, thus ensuring that the coal particles will not block the screening holes of the first screening plate, enhancing the screening effect of the first screening plate and improving the screening capacity, that is, the first screening plate can continuously and efficiently screen coal particles. On the other hand, it can cause the impurities on the first screening plate to move towards the direction of the collection box and eventually fall into the collection box, further ensuring that there are no impurities left on the first screening plate, that is, all impurities can fall into the collection box and be collected.

[0010] 3. The opposite movement directions of two adjacent moving blocks are designed to slow down the movement speed of the coal blocks and prolong the time the coal blocks stay on the first screening plate. This ensures that the conical blocks can crush the coal blocks more thoroughly, and that the first screening plate has enough time to separate the coal blocks from the impurities. In other words, all the coal blocks fall along the first screening plate, and all the impurities fall into the collection box.

[0011] In summary, through the combined action of the first screening plate, the conical block, and the collection box, the coal is initially crushed and separated from impurities. On the other hand, the probability of the first screening plate becoming clogged is reduced, and impurities are moved toward the collection box, thus cleaning and collecting the impurities on the first screening plate.

[0012] 4. Through the above-mentioned movements, this device completes the initial crushing of coal blocks, the vibration of the first screening plate, and the slowing down of the coal blocks through a single power source in the drive unit. It realizes the integrated operation of initial crushing of coal blocks, vibration of the first screening plate, and slowing down of the coal blocks, saving energy consumption. That is, it is not necessary to use multiple power sources to achieve the above functions at the same time, which reduces economic costs and improves the practicality of this device.

[0013] 5. The purpose of setting up the first screening plate is to allow coal particles with qualified particle size to fall into the bottom of the box through the first screening plate, while coal particles with unqualified particle size remain on the first screening plate and are crushed again by the cone blocks until the coal particles are of qualified particle size.

[0014] Furthermore, the crushing assembly also includes a water outlet section; the water outlet section includes a water tank, a piston cylinder, a piston block, a water outlet pipe, a hose, a chamber opened on the linkage block, and a drive unit for driving the piston block to perform vertical reciprocating motion; the water tank and piston cylinder are both fixedly connected to the housing; the piston block and piston cylinder are slidably connected; the two ends of the water outlet pipe are respectively connected to the water tank and the piston cylinder; the two ends of the hose are respectively connected to the piston cylinder and the chamber; several water spray pipes are fixedly connected to both sides of the linkage block; the water spray pipes are connected to the chamber.

[0015] The piston block is driven by the drive unit to make vertical reciprocating motion, so that the piston block can continuously pump water and drain water. When the piston block moves vertically upward, water enters the piston cylinder through the water outlet pipe and is temporarily stored. When the piston block moves vertically downward, the water stored in the piston cylinder enters the chamber through the hose and is finally discharged through the water spray pipe and acts on the coal block.

[0016] The water applied to the coal blocks serves two purposes. First, it suppresses the dust generated by the conical block crushing of the coal blocks, ensuring that no dust disperses within the box, thus improving the comfort of the working environment and protecting the health of the workers. Second, the water also cleans the first screening plate, causing the coal particles that are blocked on the first screening plate to fall along the screening holes to the bottom of the box, further reducing the probability of blockage of the first screening plate and improving its screening efficiency.

[0017] Because the linkage block can also perform vertical reciprocating motion, on the one hand, it can further expand the range of water action, so that more coal particles can be acted upon by water, thus enhancing the cleaning effect of water; on the other hand, it can allow water to be discharged from top to bottom along the water spray pipe inside the coal particles and act on the inside of the coal particles, thereby further expanding the range of water action inside the coal particles, ensuring that the dust is evenly reduced inside and outside the coal particles, thus improving the dust reduction efficiency of coal particles.

[0018] Furthermore, it also includes a second screening plate; the second screening plate is located directly below the first screening plate and is fixedly connected to the box body; the crushing assembly also includes a linkage part; the linkage part includes a transverse block, several crushing blocks, and a linkage unit for driving the transverse block to perform vertical reciprocating motion; the several crushing blocks are all fixedly connected to the bottom of the transverse block.

[0019] The coal particles that fall through the first screening plate will all fall onto the second screening plate. During this period, the horizontal block is driven to make vertical reciprocating motion through the linkage unit. While the horizontal block is making vertical reciprocating motion, the crushing block moves synchronously. During the movement of the crushing block, the crushing block can further crush the coal particles to achieve fine processing, ensuring that the coal particles are crushed more thoroughly and completely.

[0020] Because the second screening plate is located on the movement trajectory of the crushed blocks, the crushed blocks can continuously collide with the second screening plate, causing the second screening plate to vibrate. During the vibration of the second screening plate, the coal particles blocked in the screening holes of the second screening plate can be made to move vertically back and forth, eventually falling to a certain place on the second screening plate. This changes the position of the coal particles on the second screening plate, thereby ensuring that the coal particles will not block the screening holes of the second screening plate, enhancing the screening effect of the second screening plate, improving the screening capacity of the second screening plate, that is, the second screening plate can continuously and efficiently screen coal particles.

[0021] The second screening plate is designed to allow coal particles of the correct size to fall onto the conveyor through the discharge port and be transported, while coal particles of the incorrect size remain on the second screening plate and are further crushed by the crushing blocks until the coal particles are of the correct size.

[0022] Furthermore, the crushing assembly also includes an auxiliary part; the auxiliary part includes a rotating shaft, several fan blades, and a power unit for driving the rotating shaft to rotate; the rotating shaft is located between the first screening plate and the second screening plate, and the rotating shaft is rotatably connected to the housing; the several fan blades are all fixedly connected to the rotating shaft.

[0023] During the period when coal particles fall onto the second screening plate, the power unit drives the rotating shaft to rotate; during the rotation of the shaft, the fan blades rotate synchronously; during the rotation of the fan blades, the fan blades can break up the coal particles that fall from the first screening plate onto the second screening plate, further ensuring that the coal particles are evenly distributed on the second screening plate, thus preparing for the subsequent crushing work of the crushing blocks, ensuring that the crushing blocks can efficiently complete the crushing of the coal particles.

[0024] Furthermore, the crushing assembly also includes a cleaning section; the cleaning section includes a long plate, several brush layers, and a motion unit for driving the long plate to reciprocate along the length direction of the second screening plate; the several brush layers are all fixedly connected to the long plate and are attached to the second screening plate.

[0025] During the crushing of coal particles, the crushing block drives the long plate to reciprocate along the length of the second screening plate via a motion unit. During the movement of the long plate, the brush layer moves synchronously. During the movement of the brush layer, on the one hand, because the brush layer is in contact with the second screening plate, it can clear the coal particles clogging the second screening plate, preventing them from blocking the screening holes and further reducing the probability of clogging, thus enhancing the screening effect and improving the screening efficiency. On the other hand, the brush layer can also change the position of the coal particles on the second screening plate, thereby ensuring that all coal particles on the second screening plate are crushed by the crushing block.

[0026] Furthermore, it also includes an auxiliary unit; the auxiliary unit includes a rotating shaft and a power component for driving the rotating shaft to rotate; the drive unit includes a cam and a spring; the cam is fixedly connected to the rotating shaft and abuts against the moving block; the two ends of the spring are respectively connected to the moving block and the housing; the protrusions of two adjacent cams are located on both sides of the rotating shaft along the axial direction of the rotating shaft.

[0027] The rotating shaft is driven by a power component, and the cam rotates synchronously during the rotation of the rotating shaft. When the cam rotates, the cam protrusion abuts against the moving block, the moving block moves vertically downward and the spring is compressed. When the cam protrusion no longer abuts against the moving block, the moving block returns to its original position under the action of the spring and moves vertically downward. Therefore, the moving block can perform vertical reciprocating motion.

[0028] Furthermore, the drive unit is a connecting block; the two ends of the connecting block are fixedly connected to the piston block and the moving block, respectively.

[0029] During the vertical reciprocating motion of the moving block, the piston block can also perform vertical reciprocating motion under the action of the connecting block.

[0030] Furthermore, the linkage unit is an auxiliary block; the two ends of the auxiliary block are fixedly connected to the moving block and the transverse block, respectively.

[0031] During the vertical reciprocating motion of the moving block, the horizontal block can also reciprocate vertically under the action of the auxiliary block.

[0032] Furthermore, the power unit includes a first rack and a first gear; the first rack is fixedly connected to an auxiliary block; the first gear is fixedly connected to a rotating shaft, and the first rack meshes with the first gear.

[0033] During the vertical reciprocating motion of the auxiliary block, the first rack moves synchronously; during the movement of the first rack, the first gear rotates due to the meshing of the first rack with the first gear; during the rotation of the first gear, the shaft rotates synchronously.

[0034] Furthermore, the motion unit includes a second rack and a second gear; the second rack is slidably connected to the housing; the second gear is fixedly connected to the rotating shaft and meshes with the second rack; the long plate is fixedly connected to the second rack.

[0035] During the rotation of the shaft, the second gear rotates synchronously; during the rotation of the second gear, since the second gear meshes with the second rack, the second rack can reciprocate along the length of the second screening plate; during the movement of the second rack, the long plate moves synchronously. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the box body of an embodiment of a coal block conveying screening device of the present invention.

[0037] Figure 2 for Figure 1 A sectional view from the front view direction.

[0038] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0039] Figure 4 for Figure 2 A schematic diagram of the intermediate screening mechanism.

[0040] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0041] Figure 6 for Figure 4 Enlarged view of point C in the middle. Detailed Implementation

[0042] The following detailed description illustrates the specific implementation method:

[0043] The reference numerals in the accompanying drawings include: 1. Box body; 2. First screening plate; 3. Collection box; 4. Moving block; 5. Linkage block; 6. Conical block; 7. Water tank; 8. Piston cylinder; 9. Piston block; 10. Hose; 11. Water spray pipe; 12. Second screening plate; 13. Horizontal block; 14. Crushing block; 15. Rotating shaft; 16. Fan blade; 17. Long plate; 18. Brush layer; 19. Rotating shaft; 20. Cam; 21. Spring; 22. Connecting block; 23. Auxiliary block; 24. First rack; 25. First gear; 26. Second gear; 27. Second rack; 28. Second gear; 29. ​​Motor.

[0044] The basic implementation examples are as follows: Figure 1 , 2 As shown in points 3, 4, 5, and 6:

[0045] An embodiment of the present invention provides a screening device for conveying coal blocks, including a box 1 with a feed inlet on the side wall and a discharge outlet at the bottom, and a screening mechanism disposed within the box 1; the screening mechanism includes a first screening plate 2, a collection box 3 with an opening at the top, and a plurality of crushing components arranged along the length direction of the first screening plate 2; the first screening plate 2 is inclined and fixedly connected to the inner wall of the box 1, and the first screening plate 2 is located below the feed inlet; the collection box 3 is fixedly connected to the inner wall of the box 1, and the collection box 3 is located at one end of the first screening plate 2 near the bottom of the box 1; the crushing components include a moving block 4, a linkage block 5, a plurality of conical blocks 6, and a drive unit for driving the moving block 4 to perform vertical reciprocating motion; the moving block 4 is slidably connected to the inner wall of the box 1; the linkage block 5 is fixedly connected to the moving block 4; the plurality of conical blocks 6 are equidistantly arranged along the length direction of the linkage block 5, and the bottom of the conical blocks 6 is fixedly connected to the linkage block 5, and the first screening plate 2 is located on the movement trajectory of the conical blocks 6; the movement directions of two adjacent moving blocks 4 are opposite.

[0046] The crushing assembly also includes a water outlet section; the water outlet section includes a water tank 7, a piston cylinder 8, a piston block 9, a water outlet pipe, a hose 10, a chamber opened on the linkage block 5, and a drive unit for driving the piston block 9 to perform vertical reciprocating motion; the water tank 7 and the piston cylinder 8 are both fixedly connected to the inner wall of the housing 1; the piston block 9 is slidably connected to the piston cylinder 8; the two ends of the water outlet pipe are respectively connected to the water tank 7 and the piston cylinder 8, and a first one-way valve for liquid to flow unidirectionally from the water tank 7 to the piston cylinder 8 is installed on the water outlet pipe; the two ends of the hose 10 are respectively connected to the piston cylinder 8 and the chamber, and the length of the hose 10 is suitable for the vertical reciprocating motion of the linkage block 5, and a second one-way valve for liquid to flow unidirectionally from the piston cylinder 8 to the chamber is installed on the hose 10; several water spray pipes 11 are fixedly connected to both sides of the linkage block 5; the water spray pipes 11 are connected to the chamber.

[0047] It also includes a second screening plate 12; the second screening plate 12 is located directly below the first screening plate 2, and the second screening plate 12 is fixedly connected to the inner wall of the box 1; the crushing assembly also includes a linkage part; the linkage part includes a transverse block 13, a plurality of crushing blocks 14, and a linkage unit for driving the transverse block 13 to perform vertical reciprocating motion; the plurality of crushing blocks 14 are equidistantly arranged along the length direction of the transverse block 13, the crushing blocks 14 are fixedly connected to the bottom of the transverse block 13, and the second screening plate 12 is located on the movement trajectory of the crushing blocks 14.

[0048] The crushing assembly also includes an auxiliary part; the auxiliary part includes a rotating shaft 15, several fan blades 16, and a power unit for driving the rotating shaft 15 to rotate; the rotating shaft 15 is located between the first screening plate 2 and the second screening plate 12, and the rotating shaft 15 is rotatably connected to the inner wall of the housing 1; several fan blades 16 are equidistantly arranged along the length direction of the rotating shaft 15, and the fan blades 16 are fixedly connected to the rotating shaft 15.

[0049] The crushing assembly also includes a cleaning section; the cleaning section includes a long plate 17, several brush layers 18, and a motion unit for driving the long plate 17 to reciprocate along the length direction of the second screening plate 12; the several brush layers 18 are equidistantly arranged along the length direction of the long plate 17, the brush layers 18 are fixedly connected to the long plate 17, and the brush layers 18 are attached to the second screening plate 12.

[0050] It also includes an auxiliary unit; the auxiliary unit includes a rotating shaft 19 and a power component for driving the rotating shaft 19 to rotate; the power component is a motor 29, which is fixedly connected to the inner wall of the housing 1, and the output shaft of the motor 29 is fixedly connected to the rotating shaft 19; the drive unit includes a cam 20 and a spring 21; the cam 20 is fixedly connected to the rotating shaft 19 and abuts against the moving block 4; the two ends of the spring 21 are respectively connected to the moving block 4 and the inner wall of the housing 1; the protrusions of two adjacent cams 20 are located on both sides of the rotating shaft 19 along the axial direction of the rotating shaft 19.

[0051] The drive unit is a connecting block 22; both ends of the connecting block 22 are fixedly connected to the piston block 9 and the moving block 4, respectively. The linkage unit is an auxiliary block 23; both ends of the auxiliary block 23 are fixedly connected to the moving block 4 and the transverse block 13, respectively. The power unit includes a first rack 24 and a first gear 25; the first rack 24 is fixedly connected to the auxiliary block 23; the first gear 25 is fixedly connected to the rotating shaft 15, and the first rack 24 meshes with the first gear 25. The motion unit includes a second rack 27 and a second gear 26; the second rack 27 is slidably connected to the inner wall of the housing 1; the second gear 26 is fixedly connected to the rotating shaft 15, and the second gear 26 meshes with the second rack 27; the long plate 17 is fixedly connected to the second rack 27.

[0052] The specific implementation process is as follows:

[0053] After the coal block enters the first screening plate 2 through the feed inlet, it can move along the length of the first screening plate 2 towards the collection box 3 because the first screening plate 2 is inclined. During the movement of the coal block, the motor 29 is started, and the output shaft of the motor 29 drives the rotating shaft 19 to rotate. During the rotation of the rotating shaft 19, the cam 20 rotates synchronously. During the rotation of the cam 20, when the protrusion of the cam 20 abuts against the moving block 4, the moving block 4 moves vertically downward and the spring 21 is compressed. When the protrusion of the cam 20 no longer abuts against the moving block 4, the moving block 4 is reset under the action of the spring 21 and moves vertically downward. Therefore, the moving block 4 can perform vertical reciprocating motion.

[0054] During the vertical reciprocating motion of the moving block 4, the linkage block 5 moves synchronously; during the movement of the linkage block 5, the conical block 6 moves synchronously; during the movement of the conical block 6, the conical block 6 can perform preliminary crushing of the coal block, achieving coarse processing, so that the coal block is separated from impurities; after the coal block is crushed, it falls onto the second screening plate 12 through the first screening plate 2, preparing for further crushing of the coal block, while the impurities move along the length of the first screening plate 2 towards the direction of the collection box 3, and finally fall into the collection box 3, completing the cleaning and collection of impurities.

[0055] Since the first screening plate 2 is located on the movement trajectory of the conical block 6, the conical block 6 can continuously collide with the first screening plate 2, causing the first screening plate 2 to vibrate. During the vibration of the first screening plate 2, on the one hand, it can cause the coal particles blocked in the screening holes on the first screening plate 2 to move vertically back and forth, eventually falling to a certain place on the first screening plate 2, thereby changing the position of the coal particles on the first screening plate 2, thus ensuring that the coal particles will not block the screening holes on the first screening plate 2, enhancing the screening effect of the first screening plate 2, and improving the screening capacity of the first screening plate 2, that is, the first screening plate 2 can continuously and efficiently screen coal particles; on the other hand, it can cause the impurities located on the first screening plate 2 to move towards the direction of the collection box 3 and eventually fall into the collection box 3, further ensuring that there are no impurities remaining on the first screening plate 2, that is, all impurities can fall into the collection box 3 and be collected.

[0056] The opposite movement directions of two adjacent moving blocks 4 are designed to slow down the movement speed of the coal and prolong the time the coal stays on the first screening plate 2. This ensures that the conical block 6 can crush the coal more thoroughly, and that the first screening plate 2 has enough time to separate the coal from the impurities, i.e., all the coal falls along the first screening plate 2 and all the impurities fall into the collection box 3.

[0057] In summary, through the combined action of the first screening plate 2, the conical block 6, and the collection box 3, the coal is initially crushed and separated from impurities. On the other hand, the probability of the first screening plate 2 becoming clogged is reduced, and impurities are moved toward the collection box 3, thus completing the cleaning and collection of impurities on the first screening plate 2.

[0058] The first screening plate 2 is set up so that coal particles with qualified particle size fall into the bottom of the box 1 through the first screening plate 2, while coal particles with unqualified particle size remain on the first screening plate 2, and are crushed again by the cone block 6 until the coal particles are of qualified particle size.

[0059] During the vertical reciprocating motion of the moving block 4, the piston block 9 can also perform vertical reciprocating motion under the action of the connecting block 22; during the vertical reciprocating motion of the piston block 9, the piston block 9 can continuously pump water and drain water; during the vertical upward motion of the piston block 9, water enters the piston cylinder 8 through the water outlet pipe and is temporarily stored; during the vertical downward motion of the piston block 9, the water stored in the piston cylinder 8 enters the chamber through the hose 10, and is finally discharged through the water spray pipe 11 and acts on the coal block.

[0060] The water acting on the coal blocks can, on the one hand, suppress the dust generated by the cone block 6 crushing the coal blocks, ensuring that no dust spreads inside the box 1, improving the comfort of the working environment, and thus ensuring the health of the workers; on the other hand, the water can also clean the first screening plate 2, thereby causing the coal particles blocked on the first screening plate 2 to fall onto the second screening plate 12 along the screening holes, further reducing the probability of the first screening plate 2 becoming blocked and improving the screening efficiency of the first screening plate 2.

[0061] Since the linkage block 5 can also perform vertical reciprocating motion, on the one hand, it can further expand the range of water action, so that more coal particles can be acted on by water, thus enhancing the cleaning effect of water; on the other hand, it can make water discharged from top to bottom along the water spray pipe 11 inside the coal particles and act on the inside of the coal particles, thereby further expanding the range of water action inside the coal particles, ensuring that the coal particles are uniformly dusted inside and out, thus improving the dust reduction efficiency of coal particles.

[0062] During the vertical reciprocating motion of the moving block 4, the horizontal block 13 can also reciprocate vertically under the action of the auxiliary block 23; during the vertical reciprocating motion of the horizontal block 13, the crushing block 14 moves synchronously; during the movement of the crushing block 14, the crushing block 14 can further crush the coal particles that fall from the first screening plate 2 onto the second screening plate 12, achieving fine processing and ensuring that the coal particles are crushed more thoroughly and completely.

[0063] Since the second screening plate 12 is located on the movement trajectory of the crushed block 14, the crushed block 14 can continuously collide with the second screening plate 12, causing the second screening plate 12 to vibrate. During the vibration of the second screening plate 12, the coal particles blocked in the screening holes on the second screening plate 12 can be made to move vertically back and forth, and eventually fall to a certain place on the second screening plate 12, thereby changing the position of the coal particles on the second screening plate 12. This ensures that the coal particles will not block the screening holes on the second screening plate 12, enhances the screening effect of the second screening plate 12, and improves the screening capacity of the second screening plate 12. That is, the second screening plate 12 can continuously and efficiently screen coal particles.

[0064] During the vertical reciprocating motion of the auxiliary block 23, the first rack 24 moves synchronously; during the movement of the first rack 24, the first gear 25 rotates due to the meshing of the first rack 24 and the first gear 25; during the rotation of the first gear 25, the rotating shaft 15 rotates synchronously; during the rotation of the rotating shaft 15, the fan blade 16 rotates synchronously; during the rotation of the fan blade 16, the fan blade 16 can break up the coal particles that fall from the first screening plate 2 onto the second screening plate 12, further ensuring that the coal particles are evenly distributed on the second screening plate 12, thus preparing for the subsequent crushing work of the crushing block 14, ensuring that the crushing block 14 can efficiently complete the crushing of the coal particles.

[0065] During the rotation of the shaft 15, the second gear 26 rotates synchronously; during the rotation of the second gear 26, since the second gear 26 meshes with the second rack 27, the second rack 27 can reciprocate along the length direction of the second screening plate 12; during the movement of the second rack 27, the long plate 17 moves synchronously.

[0066] During the movement of the long plate 17, the brush layer 18 moves synchronously. During the movement of the brush layer 18, on the one hand, because the brush layer 18 is in contact with the second screening plate 12, the brush layer 18 can clean the coal particles blocked on the second screening plate 12, so that the coal particles are no longer blocked at the screening holes on the second screening plate 12, further reducing the probability of blockage of the second screening plate 12, enhancing the screening effect of the second screening plate 12, and improving the screening efficiency of the second screening plate 12; on the other hand, the brush layer 18 can also change the position of the coal particles on the second screening plate 12, thereby ensuring that all the coal particles on the second screening plate 12 can be crushed by the crushing block 14.

[0067] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A screening device for conveying coal blocks, comprising a housing with an inlet and an outlet, characterized in that: It also includes a screening mechanism housed within the housing; the screening mechanism includes a first screening plate, a collection box with a top opening, and several crushing components arranged along the length of the first screening plate; the first screening plate is inclined and fixedly connected to the housing; the collection box is fixedly connected to the housing and is located at one end of the first screening plate near the bottom of the housing; the crushing components include a moving block, a linkage block, several conical blocks, and a drive unit for driving the moving block to perform vertical reciprocating motion; the moving block is slidably connected to the housing; the linkage block is fixedly connected to the moving block; the several conical blocks are all fixedly connected to the bottom of the linkage block; the movement directions of two adjacent moving blocks are opposite; The crushing assembly also includes a water outlet section; the water outlet section includes a water tank, a piston cylinder, a piston block, a water outlet pipe, a hose, a chamber on the linkage block, and a drive unit for driving the piston block to perform vertical reciprocating motion; the water tank and piston cylinder are both fixedly connected to the housing; the piston block and piston cylinder are slidably connected; both ends of the water outlet pipe are connected to the water tank and piston cylinder respectively; both ends of the hose are connected to the piston cylinder and chamber respectively; several water spray pipes are fixedly connected to both sides of the linkage block; the water spray pipes are connected to the chamber. It also includes a second screening plate; the second screening plate is located directly below the first screening plate and is fixedly connected to the box body; the crushing assembly also includes a linkage part; the linkage part includes a transverse block, several crushing blocks, and a linkage unit for driving the transverse block to perform vertical reciprocating motion; the several crushing blocks are all fixedly connected to the bottom of the transverse block; The crushing assembly also includes an auxiliary part; the auxiliary part includes a rotating shaft, several fan blades, and a power unit for driving the rotating shaft to rotate; the rotating shaft is located between the first screening plate and the second screening plate, and the rotating shaft is rotatably connected to the housing; the several fan blades are all fixedly connected to the rotating shaft.

2. The screening device for conveying coal blocks according to claim 1, characterized in that: The crushing assembly also includes a cleaning section; the cleaning section includes a long plate, several brush layers, and a motion unit for driving the long plate to reciprocate along the length of the second screening plate; the several brush layers are all fixedly connected to the long plate and are attached to the second screening plate.

3. A screening device for conveying coal blocks according to claim 2, characterized in that: It also includes an auxiliary unit; the auxiliary unit includes a rotating shaft and a power component for driving the rotating shaft to rotate; the drive unit includes a cam and a spring; the cam is fixedly connected to the rotating shaft and abuts against the moving block; the two ends of the spring are respectively connected to the moving block and the housing; the protrusions of two adjacent cams are located on both sides of the rotating shaft along the axial direction of the rotating shaft.

4. A screening device for conveying coal blocks according to claim 3, characterized in that: The drive unit is a connecting block; the two ends of the connecting block are fixedly connected to the piston block and the moving block, respectively.

5. A screening device for conveying coal blocks according to claim 4, characterized in that: The linkage unit is an auxiliary block; the two ends of the auxiliary block are fixedly connected to the moving block and the transverse block, respectively.

6. A screening device for conveying coal blocks according to claim 5, characterized in that: The power unit includes a first rack and a first gear; the first rack is fixedly connected to an auxiliary block; the first gear is fixedly connected to a rotating shaft, and the first rack meshes with the first gear.

7. A screening device for conveying coal blocks according to claim 6, characterized in that: The motion unit includes a second rack and a second gear; the second rack is slidably connected to the housing; the second gear is fixedly connected to the rotating shaft and meshes with the second rack; the long plate is fixedly connected to the second rack.

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