Long coal guide plate, long coal crushing device and coal transportation device for underground coal mine

Abstract

The present invention provides a long coal guide plate, a long coal crushing device and a coal transportation device for underground coal mines, and belongs to the technical field of underground coal mining equipment. The long coal guide plate is installed on the coal transportation device for underground coal mines, and includes a fixed installation surface and a long coal guide surface. The fixed installation surface is used to be installed on the inner side of the groove of the coal transportation device. The long coal guide surface is a smooth curved surface, including a coal inlet end and a coal outlet end. The height of the coal outlet end is greater than the height of the coal inlet end. The fixed installation surface is installed on the inner side of the groove of the coal transportation device, so that the long coal guide surface faces the coal flow. At this time, the long coal passes through the long coal guide plate from the coal inlet end, and the direction is changed to form a certain angle with the coal flow direction, which prolongs the time for the long coal to pass through the crushing shaft group, and increases the probability of the long coal contacting the crushing shaft group, thereby effectively improving the crushing effect of the long coal.

Description

Technical Field

[0001] The invention belongs to the technical field of underground coal mining equipment, and in particular relates to a long coal guide plate, a long coal crushing device and an underground coal transportation device. Background Art

[0002] During the transportation of coal, the presence of long coal strips, especially narrow and flaky long coal strips, can cause great damage to the coal transportation equipment. The main reason is that the ends of the long coal strips rub against the hanging cards on both sides of the conveying device, which can not only easily lead to transportation blockages, but also easily cut the conveying device, causing equipment wear and a reduction in service life.

[0003] The crushing shaft group uses the kinetic energy stored in the high moment of inertia of the component at the rated speed to crush the coal blocks through the impact force formed by the short contact between the cutter body installed on the crusher shaft and the crushed material, and then the speed difference between the cutter tooth seat, the scraper chain and the crusher further rolls and pulls the crushed coal blocks to achieve the purpose of crushing the coal blocks. However, in actual use, the crushing shaft group has a poor effect on crushing long coal strips. The main reason is that the narrow long coal strips pass directly through the space between the crushing shaft group and the bottom of the conveying trough and cannot contact the cutter body, or when the narrow long coal strips pass through, the crushing shaft group located there happens to be at the highest point, and the long coal strips cannot be crushed. Summary of the invention

[0004] In view of this, the present invention provides a long coal guide plate to solve the technical problem in the prior art that the long coal cannot be effectively crushed when the length direction of the long coal is parallel to the transportation direction during the transportation process and passes through the crushing shaft group.

[0005] The present invention also provides a long coal crushing device to solve the technical problem in the prior art that the long coal cannot be effectively crushed during the transportation of coal, which easily causes damage to the equipment.

[0006] The present invention also provides a coal transportation device for underground coal mines, so as to solve the technical problem in the prior art that the transportation equipment for transporting long coal strips is easily worn and damaged.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A long coal guide plate is installed on a coal transportation device in a coal mine, comprising a fixed installation surface and a long coal guide surface, wherein the fixed installation surface is used to be fixedly installed on the inner side of a groove wall of the coal transportation device in the coal mine, and the long coal guide surface is a smooth curved surface, and the long coal guide surface comprises a coal inlet end and a coal outlet end, and the height of the coal outlet end is greater than the height of the coal inlet end.

[0009] Preferably, the long coal guide plate also includes an upper end face, a lower end face, a front end face and a rear end face. The upper end face, the lower end face, the front end face, the rear end face, the fixed installation surface and the long coal guide surface surround the long coal guide plate. The cross-section of the long coal guide plate parallel to the upper end face is trapezoidal, and the cross-sectional area gradually decreases from top to bottom. The cross-section of the long coal guide plate parallel to the rear end face is trapezoidal, and the cross-sectional area gradually increases from front to back.

[0010] A long coal crushing device, installed on a coal transportation device in a coal mine, comprises:

[0011] A crushing shaft assembly, wherein the crushing shaft assembly can be rotatably mounted above a coal transport device in a coal mine, and is provided with a crushing hammer head. When the crushing hammer head rotates to the lowest point, a space for coal blocks to pass through is provided between the crushing hammer head and the conveying end surface of the coal transport device in the coal mine; and

[0012] The long coal guide plate as described above is installed on the inner side of the trough wall of the coal transportation device in the coal mine, and is arranged close to the front end of the crushing shaft assembly; the long coal guide plate includes a fixed installation surface and a long coal guide surface, the fixed installation surface is used for fixed installation on the inner side of the trough wall of the coal transportation device in the coal mine, the long coal guide surface is a smooth curved surface, and the long coal guide surface includes a coal inlet end and a coal outlet end, and the height of the coal outlet end is greater than the height of the coal inlet end.

[0013] Preferably, the long coal guide plate also includes an upper end face, a lower end face, a front end face and a rear end face. The upper end face, the lower end face, the front end face, the rear end face, the fixed installation surface and the long coal guide surface surround the long coal guide plate. The cross-section of the long coal guide plate parallel to the upper end face is trapezoidal, and the cross-sectional area gradually decreases from top to bottom. The cross-section of the long coal guide plate parallel to the rear end face is trapezoidal, and the cross-sectional area gradually increases from front to back.

[0014] Preferably, the mining long coal crushing device also includes a crushing middle trough, the bottom of the crushing middle trough is provided with a coal conveying mechanism, and the two sides of the middle trough extend upward to form relatively arranged trough sides, the crushing shaft assembly can be rotatably installed on the trough sides, and the long coal guide plate is installed on the inner side of the trough sides.

[0015] Preferably, the crushing shaft assembly includes a first crushing shaft and a second crushing shaft, and the first crushing shaft and the second crushing shaft are installed in parallel on a coal transportation device in a coal mine, and the long coal guide plate includes a first coal guide plate and a second coal guide plate, and the first coal guide plate and the second coal guide plate have the same structure, and the first coal guide plate is arranged on one side of the crushing middle groove and is close to the front end of the first crushing shaft, and the second coal guide plate is arranged on the other side of the crushing middle groove, located between the first crushing shaft and the second crushing shaft, and is close to the second crushing shaft.

[0016] Preferably, the crushing shaft assembly includes a rotating shaft, a cutter tooth seat and a driving motor, the cutter tooth seat is fixedly mounted on the rotating shaft, and the crushing hammer head is mounted on the cutter tooth seat, the rotating shaft can be rotatably connected to the two side groove walls of the coal transportation device in the coal mine, and the output end of the driving motor is connected to the rotating shaft and can cause the rotating shaft to rotate along the axis.

[0017] A coal transportation device for underground coal mines, comprising:

[0018] A plurality of conveying middle troughs, wherein the plurality of conveying middle troughs are connected end to end to form a coal conveying trough body; and

[0019] The long coal crushing device as described above, the mining long coal crushing device includes a crushing middle trough, a crushing shaft assembly and a long coal guide plate, the crushing shaft assembly is arranged on the trough side of the crushing middle trough, the long coal guide plate is arranged on the inner wall of the trough side of the crushing middle trough, and the crushing middle trough is connected between any two adjacent conveying middle troughs.

[0020] It can be seen from the above technical scheme that the present invention provides a long coal guide plate, which has the following beneficial effects: the long coal guide plate includes a fixed installation surface for fixed installation on the inner side of the trough wall of a coal transportation device in a coal mine and a long coal guide surface for changing the running direction of the long coal. The height of the coal outlet end of the long coal guide surface is greater than the height of the coal inlet end. The fixed installation surface is installed on the inner side of the trough wall of the coal transportation device so that the long coal guide surface faces the coal flow. At this time, the long coal passes through the long coal guide plate from the coal inlet end and is changed in direction to form a certain angle with the coal flow direction, thereby extending the time for the long coal to pass through the crushing shaft group and increasing the probability of the long coal contacting the crushing shaft group, thereby effectively improving the crushing effect of the long coal.

[0021] The present invention also provides a long coal crushing device, including a crushing shaft assembly and the above-mentioned long coal guide plate. The long coal guide plate is arranged close to the front end of the crushing shaft assembly. The long coal passes through the long coal guide plate and its direction is changed. It then contacts the crushing hammer head of the crushing shaft assembly and is fully crushed, thereby reducing the wear of the long coal on the coal transportation equipment.

[0022] The present invention also provides a coal transportation device for underground coal mines, including a conveying middle trough, on which the long coal crushing device is installed. During transportation, the long coal strips are fully and efficiently crushed by the long coal crushing device, thereby reducing the wear of the long coal strips on the transportation device and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a long coal guide plate in a specific implementation manner.

[0024] Figure 2 It is a schematic structural diagram of a long coal crushing device in a specific implementation method.

[0025] Figure 3 It is a cross-sectional schematic diagram of a coal transportation device in a coal mine in a specific implementation manner.

[0026] Figure 4 It is a top view of a coal transportation device in a coal mine in a specific implementation manner.

[0027] In the figure: a long coal guide plate 100, a fixed mounting surface 110, a long coal guide surface 120, a coal inlet end 121, a coal outlet end 122, an upper end surface 130, a lower end surface 140, a front end surface 150, a rear end surface 160, a long coal crushing device 10, a crushing shaft assembly 200, a rotating shaft 210, a knife tooth seat 220, a driving motor 230, a crushing hammer head 201, a crushing middle groove 300, a groove side 301, a first crushing shaft 200a, a second crushing shaft 200b, a first coal guide plate 100a, and a second coal guide plate 100b. DETAILED DESCRIPTION

[0028] The technical scheme and technical effects of the present invention are further elaborated in detail below in conjunction with the accompanying drawings of the present invention.

[0029] Please see Figure 1In a specific embodiment, a long coal guide plate 100 is installed on a coal transportation device in a coal mine, and includes a fixed installation surface 110 and a long coal guide surface 120. The fixed installation surface 110 is used to be fixedly installed on the inner side of the groove wall of the coal transportation device in the coal mine. The long coal guide surface 120 is a smooth curved surface. The long coal guide surface 120 includes a coal inlet end 121 and a coal outlet end 122. The height of the coal outlet end 122 is greater than the height of the coal inlet end 121, that is, the vertical height of the long coal guide surface 120 relative to the fixed installation surface 110 gradually increases from the coal inlet end 121 to the coal outlet end 122, forming the long coal guide plate 100 with a thinner coal inlet end 121 and a thicker coal outlet end 122.

[0030] The fixed installation surface 110 is fixedly installed on the inner side of the trough wall of the coal transportation device in the coal mine. At this time, the long coal guide surface 120 is facing the direction of the coal flow. The long coal mixed in the coal flow passes through the long coal guide plate 100 through the coal inlet end 121. Under the guiding action of the long coal guide plate 100, a force that is not parallel to the direction of the coal flow is applied. Under the squeezing action between the coal blocks, the long coal is gradually changed in direction, so that a certain angle is formed between the long coal and the direction of the coal flow. On the one hand, the time for the long coal to pass through the crushing shaft group is extended, and the probability of the long coal passing through the running gap of the crushing shaft group and not being effectively crushed is reduced. On the other hand, the long coal can be in contact with the crushing hammer heads located at different positions on the crushing shaft group, thereby improving the crushing effect of the long coal.

[0031] Furthermore, the long coal guide plate 100 further includes an upper end face 130, a lower end face 140, a front end face 150 and a rear end face 160. The upper end face 130, the lower end face 140, the front end face 150, the rear end face 160, the fixed installation surface 110 and the long coal guide surface 120 surround the long coal guide plate 100. The cross section of the long coal guide plate 100 parallel to the upper end face 130 is trapezoidal, that is, the long coal guide The intersection line of the trapezoid formed by the cross section of the coal plate 100 parallel to the upper end face 130 and the long coal guide surface 120 is in an arc shape, and the cross-sectional area gradually decreases from top to bottom. The cross section of the long coal guide plate 100 parallel to the rear end face 160 is in a trapezoidal shape, that is, the intersection line of the trapezoid formed by the cross section of the long coal guide plate 100 parallel to the rear end face 160 and the long coal guide surface 120 is in an arc shape, and the cross-sectional area gradually increases from front to back. In other words, the height of the long coal guide surface 120 of the long coal guide plate 100 relative to the fixed installation surface 110 gradually increases from front to back, and gradually increases from bottom to top, forming a shape similar to a plow surface.

[0032] When the long coal strips pass through the long coal guide plate 100 from the lower end of the long coal strips, on the one hand, they are subjected to an outward force, which changes the angle of the long coal strips and forms a certain angle with the coal flow direction. On the other hand, the ends of the long coal strips are subjected to an upward force, which gradually lifts the long coal strips so that they can fully contact the crushing shaft group, thereby preventing the long coal strips, especially the narrow flake-like long coal strips, from being effectively crushed, thereby causing more serious damage to the transportation equipment.

[0033] It is worth noting that during the transportation of coal, when the coal flow passes through the long coal guide plate 100, smaller coal blocks tumble continuously on the long coal guide plate 100, and the tumbling rate of smaller coal blocks is faster, while the tumbling rate of larger coal blocks is slower, and the long coal strips are gradually lifted up and almost do not tumble, so that the larger coal blocks and long coal strips are lifted up and contact with the crushing shaft assembly, thereby achieving sufficient crushing of large coal blocks and long coal strips.

[0034] Please also see Figure 2 In another specific embodiment, a long coal crushing device 10 is installed on a coal transportation device in a coal mine, and includes: a crushing shaft assembly 200 and the long coal guide plate 100 as described above. The crushing shaft assembly 200 can be rotatably installed above the coal transportation device in the coal mine, and is provided with a crushing hammer head 201. When the crushing hammer head 201 rotates to the lowest point, there is a space for coal blocks to pass between the crushing hammer head 201 and the conveying end surface of the coal transportation device in the coal mine. The long coal guide plate 100 is installed on the inner side of the groove of the coal transportation device in the coal mine, and is arranged close to the front end of the crushing shaft assembly 200. The long coal guide plate 100 includes a fixed installation surface 110 and a long coal guide surface 120. The fixed installation surface 110 is used to be fixedly installed on the inner side of the trough wall of the coal transportation device in the coal mine. The long coal guide surface 120 is a smooth curved surface. The long coal guide surface 120 includes a coal inlet end 121 and a coal outlet end 122. The height of the coal outlet end 122 is greater than the height of the coal inlet end 121.

[0035] Furthermore, the long coal guide plate 100 further includes an upper end face 130, a lower end face 140, a front end face 150 and a rear end face 160. The upper end face 130, the lower end face 140, the front end face 150, the rear end face 160, the fixed installation surface 110 and the long coal guide surface 120 surround the long coal guide plate 100. The cross section of the long coal guide plate 100 parallel to the upper end face 130 is trapezoidal, that is, the long coal guide The intersection line of the trapezoid formed by the cross section of the coal plate 100 parallel to the upper end face 130 and the long coal guide surface 120 is in an arc shape, and the cross-sectional area gradually decreases from top to bottom. The cross section of the long coal guide plate 100 parallel to the rear end face 160 is in a trapezoidal shape, that is, the intersection line of the trapezoid formed by the cross section of the long coal guide plate 100 parallel to the rear end face 160 and the long coal guide surface 120 is in an arc shape, and the cross-sectional area gradually increases from front to back. In other words, the height of the long coal guide surface 120 of the long coal guide plate 100 relative to the fixed installation surface 110 gradually increases from front to back, and gradually increases from bottom to top, forming a shape similar to a plow surface.

[0036] When the long coal strips pass through the long coal guide plate 100 from the lower end of the long coal strips, on the one hand, they are subjected to an outward force, which changes the angle of the long coal strips and forms a certain angle with the coal flow direction. On the other hand, the ends of the long coal strips are subjected to an upward force, which gradually lifts the long coal strips to a position exceeding the lowest rotation point of the crushing hammer head 201, so that they can fully contact the crushing hammer head 201 of the crushing shaft assembly 200, thereby improving the crushing effect and preventing the long coal strips, especially the narrow flake-like long coal strips, from being effectively crushed, thereby causing more serious damage to the transportation equipment.

[0037] In order to facilitate the connection of the mining long coal crushing device with coal conveying equipment, such as a scraper conveyor, a chute conveyor, a belt conveyor, etc., so that the long coal is fully crushed during transportation, the mining long coal crushing device 10 further includes a crushing middle trough 300, the bottom of which is provided with a coal conveying mechanism, and the two sides of the crushing middle trough 300 extend upward to form a trough ledge 301 arranged oppositely, the crushing shaft assembly 200 can be rotatably mounted on the trough ledge 301, and the long coal guide plate 100 is mounted on the inner side of the trough ledge 301. During installation, it is only necessary to connect the two ends or one end of the crushing middle trough 300 with the middle trough of the scraper conveyor or the chute of the belt conveyor, and make the coal conveying mechanism parallel to the conveying end face of the middle trough of the scraper conveyor or the chute of the belt conveyor, so that the long coal can be fully crushed during the transportation of the coal, and the installation and use are convenient, and the inspection and maintenance operations are convenient.

[0038] Please also see Figure 3 and Figure 4 In a preferred embodiment, the crushing shaft assembly 200 includes a first crushing shaft 200a and a second crushing shaft 200b, and the first crushing shaft 200a and the second crushing shaft 200b are installed in parallel on the coal transportation device of the coal mine or the groove side 301 of the crushing middle groove 300. The long coal guide plate 100 includes a first coal guide plate 100a and a second coal guide plate 100b. The first coal guide plate 100a and the second coal guide plate 100b have the same structure. The first coal guide plate 100a is arranged on the groove side 301 of the crushing middle groove 300 and is arranged close to the front end of the first crushing shaft 200a. The second coal guide plate 200b is arranged on the groove side 301 of the crushing middle groove 300, located between the first crushing shaft 200a and the second crushing shaft 200b, and is arranged close to the second crushing shaft 200b.

[0039] During the transportation of the long coal strips, the long coal strips are first guided by the first coal guide plate 100a, and under the mutual squeezing of the coal blocks, the horizontal angle is changed, and the long coal strips close to the first coal guide plate 100a are lifted at the same time, and the long coal strips are crushed for the first time. Then the long coal strips pass through the second coal guide plate 200b, and the horizontal angle is changed by the second coal guide plate 200b, and the long coal strips close to the second coal guide plate 200b are lifted at the same time, and the long coal strips are crushed for the second time. The two crushings effectively improve the crushing effect of the long coal strips. On the one hand, the horizontal angle and height of the long coal strips are changed twice during the transportation process, so that the long coal strips are fully contacted with the crushing shaft assembly 200 for crushing. On the other hand, the horizontal angle of the long coal strips away from the first coal guide plate 100a does not change significantly under the squeezing effect of the coal blocks, and tends to approach the trough side away from the first coal guide plate 100a. During operation, when passing through the second coal guide plate 200b, the horizontal angle and height are significantly changed by the second coal guide plate 200b, thereby achieving secondary crushing of the missed long coal strips, improving the crushing rate of long coal strips, minimizing the cutting and damage of long coal strips to the conveying equipment, especially the belt conveyor, and extending the service life of the equipment.

[0040] Specifically, the crushing shaft assembly 200 includes a rotating shaft 210, a cutter tooth seat 220 and a driving motor 230. The cutter tooth seat 220 is fixedly mounted on the rotating shaft 210, and the crushing hammer head 201 is mounted on the cutter tooth seat 220. The rotating shaft 210 can be rotatably connected to the coal transportation device in the coal mine, or the groove sides 301 on both sides of the crushing middle groove 300. The output end of the driving motor 230 is connected to the rotating shaft 210, and can make the rotating shaft 210 rotate along the axis. The driving motor 230 drives the rotating shaft 210 to rotate, so that the cutter tooth seat 220 rotates, and the crushing hammer head 201 arranged on the cutter tooth seat 220 repeatedly contacts the coal passing through the coal transportation device in the coal mine, crushes the long strips of coal, and at the same time applies a force parallel to the coal flow direction to the transported coal blocks, thereby assisting the transportation of the coal blocks.

[0041] Please continue to see Figure 3 and Figure 4 In another specific embodiment, a coal transport device for underground coal mines includes a plurality of conveying middle troughs and the long coal crushing device 10 as described above, wherein the plurality of conveying middle troughs are connected end to end to form a coal conveying trough body. The long coal crushing device 10 for mining includes a crushing middle trough 300, a crushing shaft assembly 200 and a long coal guide plate 100, wherein the crushing shaft assembly 200 is arranged on the trough side 301 of the crushing middle trough 300, and the long coal guide plate 100 is arranged on the inner wall of the trough side 301 of the crushing middle trough 300, and the crushing middle trough 300 is connected between any two adjacent conveying middle troughs.

[0042] During the transportation process, the long coal strips are fully and efficiently crushed by the long coal strip crushing device 10, which reduces the wear of the long coal strips on the transportation device and prolongs the service life of the equipment.

[0043] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A long coal crushing device, installed on a coal transportation device in a coal mine, characterized in that: include: A crushing shaft assembly, wherein the crushing shaft assembly can be rotatably installed above the coal transportation device in the coal mine, and is provided with a crushing hammer head. When the crushing hammer head rotates to the lowest point, there is a space for coal blocks to pass through between the crushing hammer head and the conveying end surface of the coal transportation device in the coal mine; and a long coal guide plate, wherein the long coal guide plate includes a fixed installation surface and a long coal guide surface, wherein the fixed installation surface is used to be fixedly installed on the inner side of the groove wall of the coal transportation device in the coal mine, and the long coal guide surface is a smooth curved surface, and the long coal guide surface includes a coal inlet end and a coal outlet end. end, the height of the coal outlet end is greater than the height of the coal inlet end, the long coal guide plate also includes an upper end face, a lower end face, a front end face and a rear end face, the upper end face, the lower end face, the front end face, the rear end face, the fixed installation face and the long coal guide face surround the long coal guide plate, the cross section of the long coal guide plate parallel to the upper end face is trapezoidal, and the cross-sectional area gradually decreases from top to bottom, the cross section of the long coal guide plate parallel to the rear end face is trapezoidal, and the cross-sectional area gradually increases from front to back; the The long coal guide plate is installed on the inner side of the groove of the coal transportation device in the coal mine, and is arranged near the front end of the crushing shaft assembly; the long coal guide plate includes a fixed installation surface and a long coal guide surface, the fixed installation surface is used to be fixedly installed on the inner side of the groove of the coal transportation device in the coal mine, the long coal guide surface is a smooth curved surface, the long coal guide surface includes a coal inlet end and a coal outlet end, the height of the coal outlet end is greater than the height of the coal inlet end; the long coal crushing device also includes a crushing middle groove, the bottom of the crushing middle groove is provided with a coal inlet end. The invention relates to a conveying mechanism, and the two sides of the crushing middle groove extend upward to form relatively arranged groove walls, the crushing shaft assembly can be rotatably installed on the groove wall, and the long coal guide plate is installed on the inner side of the groove wall; the crushing shaft assembly includes a rotating shaft, a tooth seat and a driving motor, the tooth seat is fixedly installed on the rotating shaft, and the crushing hammer head is installed on the tooth seat, the rotating shaft can be rotatably connected to the groove walls on both sides of the coal transportation device in the coal mine, and the output end of the driving motor is connected to the rotating shaft, and can make the rotating shaft rotate along the axis.

2. The long coal crushing device according to claim 1, characterized in that: The crushing shaft assembly includes a first crushing shaft and a second crushing shaft, and the first crushing shaft and the second crushing shaft are installed in parallel on a coal transportation device in a coal mine. The long coal guide plate includes a first coal guide plate and a second coal guide plate, and the first coal guide plate has the same structure as the second coal guide plate. The first coal guide plate is arranged on one side of the crushing middle groove and is close to the front end of the first crushing shaft. The second coal guide plate is arranged on the other side of the crushing middle groove, is located between the first crushing shaft and the second crushing shaft, and is close to the second crushing shaft.

3. A coal transportation device for underground coal mines, characterized in that: include: A plurality of conveying middle troughs, wherein the plurality of conveying middle troughs are connected end to end to form a coal conveying trough body; as well as The long coal crushing device as described in claim 2 comprises a crushing middle trough, a crushing shaft assembly and a long coal guide plate, the crushing shaft assembly is arranged on the trough side of the crushing middle trough, the long coal guide plate is arranged on the inner wall of the trough side of the crushing middle trough, and the crushing middle trough is connected between any two adjacent conveying middle troughs.

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