Coal conveying equipment capable of preventing accumulation and guiding flow

Abstract

The application discloses a kind of anti-accumulation flow guide's coal conveying equipment, it is related to conveying equipment technical field, including conveying unit and pre-crushing unit, pre-crushing unit includes the inner crushing cylinder of ladder column cylinder shape, its ladder cylinder diameter is sequentially increased from bottom to top, there is annular distribution several mill rotating components on each layer column cylinder, and mill rotating component quantity is sequentially decreased from top to bottom;Mill rotating component between each layer column cylinder is linked by first transmission belt, and the broken mill in mill rotating component is slidably connected with inner crushing cylinder and is equipped with reset spring.The application is also provided with the disturbance mechanism consisting of stirrer and pestle, pestle can rotate and axially slip under the drive of curved groove sleeve.The application realizes the uniform crushing and smooth conveying of coal by multistage progressive crushing and composite disturbance flow guide, effectively prevents material accumulation, and has self-adapting adjustment capability, significantly improves conveying efficiency and equipment reliability.

Description

Technical Field

[0001] This invention relates to the field of conveying equipment technology, specifically a coal conveying equipment for preventing accumulation and guiding flow. Background Technology

[0002] Coal conveying equipment is an indispensable key piece of equipment in coal mining, production, and transportation, widely used in mine hoisting, coal preparation plant feeding, and port transshipment. Traditional coal conveying equipment typically employs a belt conveyor combined with a simple crushing device to achieve continuous coal conveying and preliminary processing. In actual operating conditions, due to the uneven size of the mined coal, some larger coal chunks are prone to rolling off the conveyor belt during transportation, accumulating at the bottom of the equipment. This not only affects conveying efficiency but may also cause equipment blockages or even shutdowns. Therefore, effective pre-processing of large coal chunks during the conveying process is crucial for improving the reliability of coal conveying systems.

[0003] Existing technology disclosed in CN108855543A has attempted to integrate crushing functionality into conveying equipment. Its crushing device combines a jaw crusher with a crushing wheel, using the reciprocating compression of the movable and fixed jaws to initially crush large pieces of coal. The coal is then further crushed by the crushing wheel before falling onto the conveyor belt. While this structure achieves some degree of integration between crushing and conveying, it still has significant shortcomings.

[0004] Jaw crushers rely on reciprocating vibration and compression, which easily leads to uneven particle size distribution during crushing, making it difficult to ensure consistent output particle size. Subsequent screening is still required for grading, increasing system complexity. Secondly, this equipment lacks dynamic adjustment capabilities during the crushing process; when encountering difficult-to-crush materials such as ore slag, the crushing components are prone to damage due to overload, resulting in poor equipment adaptability. To address these issues, there is a need in this field to develop a pre-crushing device that can achieve efficient and uniform crushing during coal conveying, and possesses anti-clogging and adaptive adjustment capabilities, thereby improving the overall operating efficiency and stability of coal conveying equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a coal conveying device that prevents accumulation and guides the flow, so as to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coal conveying device for preventing accumulation and diversion, comprising a conveying unit and a pre-crushing unit, wherein the pre-crushing unit comprises a crushing mechanism, the crushing mechanism comprises an inner crushing cylinder, a hopper and several grinding components, the inner crushing cylinder is installed above the conveying unit via a device support, and the hopper is installed on the top of the inner crushing cylinder;

[0007] The inner crushing cylinder is in the shape of a stepped column cylinder, and the diameter of the stepped cylinder increases from bottom to top. Several rotating components are evenly distributed in a ring on each stepped column cylinder, and the number of rotating components on each column cylinder decreases from top to bottom.

[0008] The inner crushing cylinder has several toothed discs on the inner wall of each layer of the column, and several tension guides on the outer wall of each layer of the column. The toothed discs and tension guides are located between two adjacent rotating components. The rotating components on each layer of the column are connected by the same first transmission belt. The tension guides on the outer wall of each layer of the column tension the first transmission belt. The inner crushing cylinder has three layers of columns. The top layer of the column has five rotating components, and the bottom layer of the column has three rotating components. From top to bottom, the crushing rollers on the rotating components of each layer are closer together, and the gap between the crushing rollers and the toothed discs is smaller. When coal is fed from the hopper, it is crushed into relatively uniform coal blocks after being crushed and pre-treated by the three layers of rotating components in the inner crushing cylinder. The coal blocks are then transported by the conveying unit.

[0009] Furthermore, each of the rolling components also includes a sliding carrier and a crushing roller. The sliding carrier is slidably connected to the inner crushing cylinder, and a return spring is provided between the sliding carrier and the inner crushing cylinder. The sliding carrier is U-shaped and hollow inside. The crushing roller is rotatably connected to the sliding carrier through a spindle and is located inside the inner crushing cylinder.

[0010] Furthermore, a driven pulley is connected to the mandrel of the crushing mill. The driven pulley is located inside the sliding carrier. The first transmission belt is connected to the driven pulley. A pair of guide wheels are provided on the side of the sliding carrier away from the crushing mill. A guide post is provided inside the sliding carrier. The pair of guide wheels and the guide post guide the first transmission belt to reverse direction.

[0011] Furthermore, several driving elements are also provided on the outer side of the inner crushing cylinder. Each driving element drives a first transmission belt to move. The driving element drives the first transmission belt to move, and the first transmission belt drives the driven pulley to rotate. The driven pulley drives the crushing mill to rotate. The movement directions of two adjacent crushing mills on each layer are opposite. The shearing force of the crushing mills moving in opposite directions is used to crush and decompose the coal blocks thrown from the hopper. After continuous crushing by the three layers of crushing components, the large coal blocks are finally broken into small coal blocks and fall onto the conveying unit.

[0012] If the coal block contains slag that is difficult to crush, the crushing mill cannot crush it when it squeezes the slag. The return spring can compensate for the displacement of the sliding carrier, avoiding strong compression between the crushing mill and the slag, thereby protecting the crushing mill. Through continuous crushing operation, the pre-crushing speed of the coal block is improved, ensuring product consistency. Uncrushable slag is screened out in the next screening process.

[0013] Furthermore, a rear roller is provided on the side of the sliding carrier away from the crushing mill, and an outer rotating cylinder is rotatably installed on the equipment support. The outer rotating cylinder is sleeved on the outside of the inner crushing cylinder. The inner ring of the outer rotating cylinder is provided with an inner convex ring corresponding to each layer of the stepped column cylinder. A semi-circular protrusion is provided on the inner ring of each inner convex ring, and the semi-circular protrusion is in contact with the rear roller.

[0014] Furthermore, a first motor is installed on the equipment support, and a drive gear is installed on the motor shaft of the first motor. The outer wall of the outer rotating cylinder is provided with a toothed groove, and the drive gear meshes with the toothed groove. The first motor drives the drive gear to rotate, and the drive gear drives the outer rotating cylinder to rotate through the toothed groove. All the inner convex rings of the inner ring rotate synchronously. The semi-circular protrusions on the inner convex rings push the roller once each time they rotate. The sliding carrier drives the crushing roller to squeeze the coal block, achieving a dual crushing effect of rotational crushing and compression crushing. The sliding carrier is reset under the action of the return spring, and the tension guide keeps the first transmission belt tensioned at all times. Even if the sliding carrier slides on the inner crushing cylinder, the first transmission belt can continuously transmit power to the driven pulley by adjusting the tension through the tension guide.

[0015] Furthermore, the pre-crushing unit also includes a disturbance mechanism, which includes a hollow three-beam. The hollow three-beam is installed in the hopper, and a bushing pulley is rotatably installed at the center of the hollow three-beam. A spline shaft is axially slidably installed at the center of the bushing pulley. A stirring rod is connected to the upper end of the spline shaft, and a pestle is connected to the lower end of the spline shaft. The stirring rod is located in the hopper, and the pestle is located in the inner crushing cylinder.

[0016] Furthermore, a drive pulley is coaxially mounted on the motor shaft of the first motor. A second transmission belt connects the drive pulley and the bushing pulley. The second transmission belt is located inside the hollow three-bracket beam. The first motor drives the drive gear to rotate while simultaneously driving the drive pulley to rotate. The drive pulley drives the bushing pulley to rotate through the second transmission belt. The spline shaft is driven to rotate synchronously. When the agitator at the upper end of the spline shaft rotates, it disturbs the coal blocks in the hopper, preventing coal accumulation and playing a guiding role.

[0017] Furthermore, a pin is provided at the bottom of the pestle, and a curved groove sleeve is installed at the bottom of the inner crushing cylinder. The bottom end of the pestle is slidably connected to the curved groove sleeve. The inner ring of the curved groove sleeve has a continuous closed-loop curved groove. The pin is slidably installed in the curved groove. When the pestle at the lower end of the spline shaft rotates, the pin moves along the curved groove, so that the pestle rotates and slides along the axial direction at the same time, forming a compound motion form of rotating and moving axially at the same time. The pestle is thicker at the top and thinner at the bottom. When it slides along the axial direction, it pounds the coal blocks in the middle of the inner crushing cylinder downward, which enhances the guiding and crushing effect and prevents the coal blocks from accumulating in the hopper.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting up a stepped cylindrical inner crushing cylinder, coupled with a decreasing number of grinding components from top to bottom, the coal passes through multiple crushing zones sequentially during its descent under gravity. The gap between the crushing roller and the jaws decreases progressively at each stage, achieving gradual crushing of the coal from coarse to fine. Compared to methods relying on a combination of jaw reciprocating vibration and crushing wheels, this invention avoids the problem of uneven particle size distribution caused by a single compression method. The crushed coal particles are more uniform in size, effectively preventing large pieces of coal from accumulating or rolling off the conveyor belt, and significantly improving the continuity and operating efficiency of the conveying system.

[0020] 2. When hard foreign objects such as slag that are difficult to crush are mixed into the coal block, the sliding carrier can slide radially along the inner crushing cylinder after the crushing roller is compressed, realizing displacement compensation and avoiding rigid compression between the crushing roller and hard objects, effectively reducing the risk of overload damage to the crushing components. At the same time, combined with the semi-circular protrusion on the inner convex ring of the outer rotating cylinder and the matching structure of the rear roller, the coal block can be periodically crushed by compression, forming a combined effect of rotational crushing and compression crushing, further improving crushing efficiency while reducing the impact load on the equipment and extending the service life of key components.

[0021] 3. By setting up a disturbance mechanism consisting of a stirring rod and a pestle, the stirring rod is driven to rotate via a splined shaft, continuously disturbing the coal blocks in the feeding area and preventing coal from bridging or accumulating at the hopper opening. Simultaneously, the pestle performs axial compound motion along the curved groove of the curved sleeve during rotation, pounding the coal blocks in the middle of the inner crushing cylinder downwards, creating a guiding effect and further promoting the smooth falling of material. Compared to the method of relying on eccentric wheel vibration for material feeding, this invention achieves active disturbance and guidance during the crushing process, significantly improving the equipment's adaptability to high-moisture and high-viscosity coal. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a bottom view of the pre-crushing unit of the present invention.

[0024] Figure 3 This is a top view of the pre-crushing unit of the present invention;

[0025] Figure 4 This is a cross-sectional structural diagram of the outer rotating cylinder of the present invention;

[0026] Figure 5 This is a cross-sectional structural diagram of the inner crushing cylinder of the present invention;

[0027] Figure 6 This is a schematic diagram of the outer structure of the inner crushing cylinder of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the sliding carrier of the present invention;

[0029] Figure 8 This is a cross-sectional structural diagram of the sliding carrier of the present invention.

[0030] In the diagram: 1. Conveying unit; 2. Pre-crushing unit; 3. Equipment support; 4. Inner crushing cylinder; 5. Outer rotating cylinder; 6. Hopper; 7. Hollow three-braced beam; 8. Curved groove sleeve; 9. Shaft sleeve pulley; 10. Splined shaft; 11. First transmission belt; 12. First motor; 13. Drive gear; 14. Drive pulley; 15. Pound bar; 16. Stirring bar; 17. Inner convex ring; 18. Tensioning guide; 19. Second transmission belt; 20. Sliding carrier; 21. Crushing mill; 22. Rear roller; 23. Guide wheel; 24. Driven pulley; 25. Guide column. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example: Figures 1-8As shown, the present invention provides a technical solution: a coal conveying device for preventing accumulation and diversion, comprising a conveying unit 1 and a pre-crushing unit 2. The pre-crushing unit 2 includes a crushing mechanism, which includes an inner crushing cylinder 4, a hopper 6, and several rotating components. The inner crushing cylinder 4 is installed above the conveying unit 1 via a support frame 3. The hopper 6 is installed on the top of the inner crushing cylinder 4. The inner crushing cylinder 4 is in the shape of a stepped cylindrical column, with the diameter of each step increasing from bottom to top. Several rotating components are evenly distributed in a ring on each step of the cylindrical column, and the number of rotating components on each step decreases from top to bottom. Several toothed flaps are provided on the inner wall of each step of the cylindrical column, and several toothed flaps are provided on the outer wall of each step of the cylindrical column. Tensioning guide 18, tooth flap and tensioning guide 18 are set between two adjacent rolling components. Several rolling components on each layer of column are connected by the same first transmission belt 11. Several tensioning guides 18 on the outer wall of each layer of column tension the first transmission belt 11. The inner crushing cylinder 4 has three layers of column. The top layer of column is equipped with five rolling components and the bottom layer of column is equipped with three rolling components. The crushing rollers 21 on each layer of rolling components from top to bottom are closer together. The gap between the crushing rollers 21 and the tooth flap is smaller. When coal is thrown from the hopper 6, it is crushed into relatively uniform coal blocks after being crushed and pre-treated by the three layers of rolling components in the inner crushing cylinder 4. The coal blocks are then transported by the conveying unit 1.

[0033] Each grinding assembly also includes a sliding carrier 20 and a crushing roller 21. The sliding carrier 20 is slidably connected to the inner crushing cylinder 4. A return spring (not shown in the figure) is provided between the sliding carrier 20 and the inner crushing cylinder 4. The sliding carrier 20 is U-shaped and hollow inside. The crushing roller 21 is rotatably connected to the sliding carrier 20 through a spindle. The crushing roller 21 is located inside the inner crushing cylinder 4. A driven pulley 24 is also connected to the spindle of the crushing roller 21. The driven pulley 24 is located inside the sliding carrier 20. The first transmission belt 11 is connected to the driven pulley 24. A pair of guide wheels 23 are provided on the side of the sliding carrier 20 away from the crushing roller 21. A guide post 25 is provided inside the sliding carrier 20. The pair of guide wheels 23 and the guide post 25 guide the first transmission belt 11 in reverse direction. Several driving elements (not shown in the figure) are also provided on the outside of the inner crushing cylinder 4. Each driving element drives one of the first transmission belts 11 to move.

[0034] The driving element drives the first transmission belt 11 to move, the first transmission belt 11 drives the driven pulley 24 to rotate, and the driven pulley 24 drives the crushing mill 21 to rotate. The movement directions of two adjacent crushing mills 21 on each layer are opposite to each other. The shearing force of the crushing mill 21 moving in the opposite direction is used to crush and decompose the coal blocks thrown into the hopper 6. After continuous crushing by the three layers of crushing components, the large coal blocks are finally broken into small coal blocks and fall onto the conveying unit 1. If there are difficult-to-crush ore slags mixed in the coal blocks, the crushing mill 21 cannot crush them when it squeezes the ore slags. The return spring can make the sliding carrier 20 perform displacement compensation to avoid strong squeezing between the crushing mill 21 and the ore slags, thereby achieving the function of protecting the crushing mill 21. Through continuous crushing operation, the pre-crushing speed of the coal blocks is improved, ensuring the consistency of the product. The ore slags that cannot be crushed are screened out in the next screening process.

[0035] A rear roller 22 is provided on the side of the sliding carrier 20 away from the crushing mill 21. An outer rotating cylinder 5 is rotatably mounted on the equipment support 3, and the outer rotating cylinder 5 is sleeved on the outside of the inner crushing cylinder 4. The inner ring of the outer rotating cylinder 5 is provided with an inner convex ring 17 corresponding to each layer of the stepped column cylinder. A semi-circular protrusion is provided on the inner ring of each inner convex ring 17, and the semi-circular protrusion contacts the rear roller 22. A first motor 12 is mounted on the equipment support 3, and a drive gear 13 is mounted on the motor shaft of the first motor 12. A toothed groove is opened on the outer wall of the outer rotating cylinder 5, and the drive gear 13 meshes with the toothed groove. The first motor 12 drives the drive gear 13 to rotate. Gear 13 drives the outer rotating cylinder 5 to rotate through the tooth groove. All the inner convex rings 17 of the inner ring of the outer rotating cylinder 5 rotate synchronously. The semi-circular protrusions on the inner convex rings 17 push the roller 22 once each time they rotate. The sliding carrier 20 drives the crushing mill 21 to squeeze the coal block, achieving a dual crushing effect of rotation crushing and compression crushing. The sliding carrier 20 is reset under the action of the reset spring. The tension guide 18 keeps the first transmission belt 11 tensioned at all times. Even if the sliding carrier 20 slides on the inner crushing cylinder 4, the first transmission belt 11 can continuously transmit power to the driven pulley 24 by adjusting the tension through the tension guide 18.

[0036] The pre-crushing unit 2 also includes a disturbance mechanism, which includes a hollow three-beam 7. The hollow three-beam 7 is installed in the hopper 6. A bushing pulley 9 is rotatably mounted at the center of the hollow three-beam 7. A spline shaft 10 is axially slidably mounted at the center of the bushing pulley 9. A stirring rod 16 is connected to the upper end of the spline shaft 10, and a pestle 15 is connected to the lower end of the spline shaft 10. The stirring rod 16 is located in the hopper 6, and the pestle 15 is located in the inner crushing cylinder 4. A drive pulley 14 is also coaxially mounted on the motor shaft of the first motor 12. A second transmission belt 19 is connected between the drive pulley 14 and the bushing pulley 9. The second transmission belt 19 is located inside the hollow three-beam 7. A pin is provided at the bottom of the pestle 15. A curved groove sleeve 8 is installed at the bottom of the inner crushing cylinder 4. The bottom end of the pestle 15 is slidably connected to the curved groove sleeve 8. A continuous closed-loop curved groove is opened in the inner ring of the curved groove sleeve 8, and the pin is slidably installed in the curved groove.

[0037] The first motor 12 drives the drive gear 13 to rotate, and at the same time drives the drive pulley 14 to rotate. The drive pulley 14 drives the bushing pulley 9 to rotate through the second transmission belt 19. The spline shaft 10 is driven to rotate synchronously. When the stirring bar 16 at the upper end of the spline shaft 10 rotates, it disturbs the coal in the hopper 6 to prevent coal accumulation and plays a guiding role. When the pestle 15 at the lower end of the spline shaft 10 rotates, the pin moves along the curved groove, so that the pestle 15 rotates and slides along the axial direction at the same time, forming a compound motion form of rotating and axial movement. The pestle 15 is thicker at the top and thinner at the bottom. When it slides along the axial direction, it pounds the coal in the middle of the inner crushing cylinder 4 downward, which enhances the guiding and crushing effect and prevents the coal from accumulating in the hopper 6.

[0038] The working principle of this invention: The inner crushing cylinder 4 has three layers of cylinders. The top cylinder is equipped with five rotating components, and the bottom cylinder is equipped with three rotating components. The crushing rollers 21 on each rotating component from top to bottom are closer together, and the gap between the crushing rollers 21 and the teeth is smaller. When coal is thrown from the hopper 6, it is crushed into relatively uniform coal blocks after being crushed and pre-treated by the three rotating components in the inner crushing cylinder 4. The coal blocks are then transported by the conveying unit 1.

[0039] The driving element drives the first transmission belt 11 to move, the first transmission belt 11 drives the driven pulley 24 to rotate, and the driven pulley 24 drives the crushing mill 21 to rotate. The movement directions of two adjacent crushing mills 21 on each layer are opposite to each other. The shearing force of the crushing mill 21 moving in the opposite direction is used to crush and decompose the coal blocks thrown into the hopper 6. After continuous crushing by the three layers of crushing components, the large coal blocks are finally broken into small coal blocks and fall onto the conveying unit 1. If there are difficult-to-crush ore slags mixed in the coal blocks, the crushing mill 21 cannot crush them when it squeezes the ore slags. The return spring can make the sliding carrier 20 perform displacement compensation to avoid strong squeezing between the crushing mill 21 and the ore slags, thereby achieving the function of protecting the crushing mill 21. Through continuous crushing operation, the pre-crushing speed of the coal blocks is improved, ensuring the consistency of the product. The ore slags that cannot be crushed are screened out in the next screening process.

[0040] The first motor 12 drives the drive gear 13 to rotate. The drive gear 13 drives the outer rotating cylinder 5 to rotate through the tooth groove. All the inner convex rings 17 of the inner ring of the outer rotating cylinder 5 rotate synchronously. The semi-circular protrusions on the inner convex rings 17 push the roller 22 once each time they rotate. The sliding carrier 20 drives the crushing mill 21 to squeeze the coal block, achieving a dual crushing effect of rotation crushing and compression crushing. The sliding carrier 20 is reset under the action of the reset spring. The tension guide 18 keeps the first transmission belt 11 tensioned at all times. Even if the sliding carrier 20 slides on the inner crushing cylinder 4, the first transmission belt 11 can continuously transmit power to the driven pulley 24 by adjusting the tension through the tension guide 18.

[0041] The first motor 12 drives the drive gear 13 to rotate, and at the same time drives the drive pulley 14 to rotate. The drive pulley 14 drives the bushing pulley 9 to rotate through the second transmission belt 19. The spline shaft 10 is driven to rotate synchronously. When the stirring bar 16 at the upper end of the spline shaft 10 rotates, it disturbs the coal in the hopper 6 to prevent coal accumulation and plays a guiding role. When the pestle 15 at the lower end of the spline shaft 10 rotates, the pin moves along the curved groove, so that the pestle 15 rotates and slides along the axial direction at the same time, forming a compound motion form of rotating and axial movement. The pestle 15 is thicker at the top and thinner at the bottom. When it slides along the axial direction, it pounds the coal in the middle of the inner crushing cylinder 4 downward, which enhances the guiding and crushing effect and prevents the coal from accumulating in the hopper 6.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A coal conveying device for preventing accumulation and diversion, characterized in that: It includes a conveying unit (1) and a pre-crushing unit (2). The pre-crushing unit (2) includes a crushing mechanism, which includes an inner crushing cylinder (4), a hopper (6) and several grinding components. The inner crushing cylinder (4) is installed above the conveying unit (1) via a device bracket (3), and the hopper (6) is installed on the top of the inner crushing cylinder (4). The inner crushing cylinder (4) is in the shape of a stepped column. The diameter of the stepped cylinder of the inner crushing cylinder (4) increases from bottom to top. Several rotating components are evenly distributed in a ring on each stepped column. The number of rotating components on each column decreases from top to bottom. The inner crushing cylinder (4) has several toothed flaps on the inner wall of each layer of the column cylinder, and several tension guides (18) on the outer wall of each layer of the column cylinder. The toothed flaps and tension guides (18) are located between two adjacent rolling components. The rolling components on each layer of the column cylinder are connected by the same first transmission belt (11). The tension guides (18) on the outer wall of each layer of the column cylinder tension the first transmission belt (11). Each of the aforementioned rolling components further includes a sliding carrier (20) and a crushing roller (21). The sliding carrier (20) is slidably connected to the inner crushing cylinder (4). A return spring is provided between the sliding carrier (20) and the inner crushing cylinder (4). The sliding carrier (20) is U-shaped and hollow inside. The crushing roller (21) is rotatably connected to the sliding carrier (20) through a spindle. The crushing roller (21) is located inside the inner crushing cylinder (4). A driven pulley (24) is also connected to the spindle of the crushing mill (21). The driven pulley (24) is located inside the sliding carrier (20). The first transmission belt (11) is connected to the driven pulley (24). A pair of guide wheels (23) are provided on the side of the sliding carrier (20) away from the crushing mill (21). A guide post (25) is provided inside the sliding carrier (20). The pair of guide wheels (23) and the guide post (25) guide the first transmission belt (11) to reverse direction. Several driving elements are also provided on the outside of the inner crushing cylinder (4), and each driving element drives a first transmission belt (11) to move. The sliding carrier (20) is provided with a rear roller (22) on the side away from the crushing mill (21). An outer rotating cylinder (5) is rotatably installed on the equipment support (3). The outer rotating cylinder (5) is sleeved on the outside of the inner crushing cylinder (4). The inner ring of the outer rotating cylinder (5) is provided with an inner convex ring (17) corresponding to each layer of the stepped column cylinder. A semi-circular protrusion is provided on the inner ring of each inner convex ring (17). The semi-circular protrusion is in contact with the rear roller (22).

2. The coal conveying equipment for preventing accumulation and guiding flow according to claim 1, characterized in that: The equipment bracket (3) is equipped with a first motor (12), and the motor shaft of the first motor (12) is equipped with a drive gear (13). The outer wall of the outer rotating cylinder (5) is provided with a tooth groove, and the drive gear (13) meshes with the tooth groove.

3. A coal conveying device for preventing accumulation and guiding flow according to claim 2, characterized in that: The pre-crushing unit (2) also includes a disturbance mechanism, which includes a hollow three-beam (7). The hollow three-beam (7) is installed in the hopper (6). A bushing pulley (9) is rotatably installed at the center of the hollow three-beam (7). A spline shaft (10) is axially slidably installed at the center of the bushing pulley (9). A stirring rod (16) is connected to the upper end of the spline shaft (10), and a pestle (15) is connected to the lower end of the spline shaft (10). The stirring rod (16) is located in the hopper (6), and the pestle (15) is located in the inner crushing cylinder (4).

4. A coal conveying device for preventing accumulation and guiding flow according to claim 3, characterized in that: The first motor (12) also has a drive pulley (14) coaxially mounted on its motor shaft. The drive pulley (14) is connected to the bushing pulley (9) by a second transmission belt (19), which is located inside the hollow three-branch beam (7).

5. A coal conveying device for preventing accumulation and guiding flow according to claim 3, characterized in that: A pin is provided at the bottom of the pestle (15), and a curved groove sleeve (8) is installed at the bottom of the inner crushing cylinder (4). The bottom end of the pestle (15) is slidably connected to the curved groove sleeve (8). The inner ring of the curved groove sleeve (8) is provided with a continuous closed-loop curved groove, and the pin is slidably installed in the curved groove.

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