Coal conveying belt non-return device and coal conveying equipment

Abstract

The utility model relates to the technical field of coal conveying equipment, and provides a coal conveying belt non-return device and coal conveying equipment, the coal conveying belt non-return device comprises a ratchet ring, a pawl and a base, the ratchet ring is used for being connected to a coupler between a speed reducer and a roller of the coal conveying equipment in a sleeved mode, the pawl is rotatably connected to the base, and the ratchet ring is used for being connected to the base in a sleeved mode. Continuous ratchets are arranged on the outer ring of the ratchet ring, and the tip of each pawl is used for being connected between every two adjacent ratchets in an abutting mode. According to the utility model, the reverse rotation of the roller of the belt conveyor is effectively prevented, the reliability and the stability of the whole operation of coal conveying equipment are ensured, meanwhile, the ratchet ring is sleeved on the coupler, the ratchet ring can vibrate along with the operation of the coupler in the operation process of the equipment, pulverized coal and the like are prevented from being accumulated at the root of the ratchet, the whole stability and the reliability are further improved, and the service life is prolonged. And moreover, the ratchet ring is located outside the equipment, so that maintenance operations such as timely cleaning and part replacement after long-term use are also facilitated, and the maintenance and repair are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of coal conveying equipment, in particular to a coal conveying belt backstop device and coal conveying equipment. Background Art

[0002] In coal conveying equipment, such as coal conveyor belts, the motor is generally connected to the reducer and then to the roller of the belt conveyor through a coupling to drive it to rotate and then perform conveying operations. At the same time, during the operation of the coal conveyor belt, it is generally necessary to start and stop many times. At this time, a check device is needed to prevent the belt from reversing and other unstable situations.

[0003] In the prior art, a general check device is installed inside the reducer, for example, to prevent the belt from reversing by means of gear meshing. However, after a period of use, the coal powder generated during operation will accumulate at the root of the teeth, which is not easy to clean. It will also aggravate tooth wear, causing the belt conveyor to fail to check the belt. When the belt is loaded and stopped, it will reverse, causing coal to overflow, making the coal transportation site environment worse and increasing the on-site cleaning burden. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to improve the effectiveness and maintenance convenience of a coal conveyor belt backstop device.

[0005] The utility model provides a coal conveyor belt backstop device, comprising a ratchet ring, a pawl and a base, wherein the ratchet ring is used to be sleeved on a coupling between a reducer and a roller of coal conveying equipment, the pawl is rotatably connected to the base, the outer ring of the ratchet ring is provided with continuous ratchets, and the tip of the pawl is used to abut between two adjacent ratchets.

[0006] Optionally, the pawl is located below the ratchet ring.

[0007] Optionally, a counterweight is connected to one end of the pawl away from the tip.

[0008] Optionally, two ends of the two pawls facing away from the tip are connected to each other, one of the pawls is rotatably connected to the base, and the other pawl is used as a weight.

[0009] Optionally, the two pawls are arranged opposite to each other and are welded into one body.

[0010] Optionally, the base includes a bottom plate and a support rod, the support rod is connected to the bottom plate and extends upward, and the pawl is rotatably connected to the upper end of the support rod.

[0011] Optionally, the coal conveyor belt check device further includes a bolt, a connecting hole is provided at the upper end of the support rod, a rotating hole is provided at the pawl, and the bolt is used to pass through the connecting hole and the rotating hole.

[0012] Optionally, the ratchet ring includes two half-ring bodies with identical structures, the two half-ring bodies are respectively used to be connected to the coupling, and the two half-ring bodies are spliced ​​together to form the ratchet ring.

[0013] Optionally, the two half-ring bodies are respectively used for welding to the outer wall of the large-diameter wheel rim of the coupling.

[0014] Compared with the prior art, the coal conveyor belt backstop device provided by the utility model has the following technical effects:

[0015] The coal conveyor belt check device provided by the present invention is characterized in that, by providing a ratchet ring, the ratchet ring can be sleeved and fixed on the coupling between the reducer in the coal conveying equipment and the roller of the belt conveyor, and by providing a base, the base can be installed on a base such as a bracket, platform or the like of the coal conveying equipment near the coupling. At the same time, a pawl connected to the base is rotated and can be matched with the continuous ratchets provided on the outer ring of the ratchet ring. When in use, the tip of the pawl can be abutted between two adjacent ratchets, and the direction of the pawl can be set to correspond to the rotation direction of the coupling, so that when the coal conveying equipment is operating normally, the pawl will not affect the rotation of the ratchet ring, that is, it will not affect During normal coal conveying operations, if the belt conveyor drum may reverse due to shutdown or overload, the pawl will abut and limit the root of the ratchet teeth of the ratchet ring to prevent the ratchet ring from reversing, that is, effectively preventing the belt conveyor drum from reversing, ensuring the reliability and stability of the overall operation of the coal conveying equipment. At the same time, the ratchet ring is sleeved on the coupling. During the operation of the equipment, the ratchet ring can vibrate as the coupling runs, preventing coal powder and the like from accumulating at the root of the ratchet teeth, further improving the overall stability and reliability. In addition, the ratchet ring is located on the outside of the equipment, which is convenient for timely cleaning and maintenance operations such as replacement of parts after long-term use, making maintenance and repair more convenient.

[0016] In addition, the utility model also provides a coal conveying equipment, including a motor, a reducer, a coupling, a belt conveyor and the above-mentioned coal conveying belt check device, the motor is driven and connected to the reducer, the reducer is driven and connected to the roller of the belt conveyor through the coupling, and the ratchet ring of the coal conveying belt check device is sleeved on the coupling.

[0017] Compared with the prior art, the coal conveying equipment provided by the utility model is provided with a motor, a reducer, a coupling, a belt conveyor and the above-mentioned coal conveying belt check device, and its technical effects are roughly the same as the technical effects of the above-mentioned coal conveying belt check device, which will not be repeated here. At the same time, by driving the motor to connect the reducer, and driving the reducer to the roller of the belt conveyor through the coupling, the coal conveying operation can be carried out by driving the belt conveyor by the motor, and by connecting the ratchet ring of the coal conveying belt check device to the coupling, the ratchet ring can be prevented from reversing, thereby preventing the belt conveyor from reversing, thereby improving the stability and reliability of the overall operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a coal conveyor belt backstop device according to an embodiment of the present utility model;

[0019] Figure 2 This is a structural diagram of the coal conveying equipment according to an embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 10-ratchet ring, 20-pawl, 21-tip, 22-rotation hole, 30-base, 31-bottom plate, 32-support rod, 40-bolt, 50-motor, 60-reducer, 70-coupling, 80-roller. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0024] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Throughout this specification, references to the terms "embodiment," "one embodiment," and "one implementation" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

[0027] In order to solve the above technical problems, Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a coal conveyor belt check device, including a ratchet ring 10, a pawl 20 and a base 30, wherein the ratchet ring 10 is used to be sleeved on the coupling 70 between the reducer 60 and the roller 80 of the coal conveying equipment, and the pawl 20 is rotatably connected to the base 30. The outer ring of the ratchet ring 10 is provided with continuous ratchets, and the tip 21 of the pawl 20 is used to abut between two adjacent ratchets.

[0028] It should be noted that the coal conveyor belt check device can be applied to coal conveying equipment with a belt conveyor, such as Figure 2 In the coal conveying equipment shown, the ratchet ring 10 can be sleeved and fixed on the outer ring of the coupling 70. The coupling 70 serves as a serial connection between the reducer 60 and the roller 80 of the belt conveyor, and can rotate along with the output shaft of the reducer 60 and the roller 80. This prevents the ratchet ring 10 fixed on the coupling 70 from reversing, which also prevents the belt conveyor from reversing. At the same time, the outer circle of the ratchet ring 10 is provided with a circle of continuous ratchet teeth, and the tip 21 of the pawl 20 matches the ratchet teeth. The installation direction, installation position, and structural dimensions of the ratchet ring 10 can be designed according to actual conditions, such as the rotation direction, installation position, and structural dimensions of the coupling 70. Figure 1As shown in FIG, the coupling 70 rotates clockwise as indicated by the solid arrow in the figure, and the ratchet ring 10 mounted thereon also rotates clockwise. The pawl 20 is mounted near the ratchet ring 10 via the base 30, and the tip 21 of the pawl 20 is oriented and positioned accordingly so that the tip 21 of the pawl 20 is located between two ratchet teeth. When the ratchet ring 10 is operating normally according to the coupling 70, for example, when rotating clockwise in the figure, the tip 21 of the pawl 20 slides in contact with the ratchet teeth of the ratchet ring 10, thereby not hindering the normal rotation of the ratchet ring 10 and, consequently, the normal operation of the coal conveying equipment. Conversely, when the coal conveying equipment is shut down or overloaded and may reverse, the tip 21 of the pawl 20 can abut between the two ratchet teeth, preventing the ratchet ring 10 from reversing, thereby preventing the coal conveying equipment from reversing and other instability. Of course, it is understood that the position, mounting orientation, and rotation direction of the pawl 20 can be adjusted according to actual needs.

[0029] In this embodiment, the coal conveyor belt check device provided in this embodiment is provided with a ratchet ring 10, and the ratchet ring 10 can be sleeved and fixed on the coupling 70 between the reducer 60 in the coal conveying equipment and the roller 80 of the belt conveyor, and by providing a base 30, the base 30 can be installed on a base such as a bracket or platform of the coal conveying equipment near the coupling 70. At the same time, the pawl 20 is connected to the base 30 by rotation, and can be matched with the continuous ratchets provided on the outer ring of the ratchet ring 10. When in use, the tip 21 of the pawl 20 can be abutted between two adjacent ratchets, and the direction of the pawl 20 can be set to correspond to the rotation direction of the coupling 70, so that when the coal conveying equipment is operating normally, the pawl 20 will not affect the ratchet ring 10. Rotation, that is, it will not affect the normal coal conveying operation. When the roller 80 of the belt conveyor may reverse due to shutdown or overload, the pawl 20 will abut and limit the root of the ratchet teeth of the ratchet ring 10, which can prevent the ratchet ring 10 from reversing, that is, it effectively prevents the roller 80 of the belt conveyor from reversing, ensuring the reliability and stability of the overall operation of the coal conveying equipment. At the same time, the ratchet ring 10 is sleeved on the coupling 70. During the operation of the equipment, the ratchet ring 10 can vibrate as the coupling 70 runs, preventing coal powder and the like from accumulating at the root of the ratchet teeth, further improving the overall stability and reliability. In addition, the ratchet ring 10 is located outside the equipment, which is also convenient for timely cleaning and maintenance operations such as replacement of parts after long-term use, making maintenance and repair more convenient.

[0030] Alternatively, as Figure 1 As shown, the pawl 20 is located below the ratchet ring 10 .

[0031] Specifically, the pawl 20 is installed at the lower left or lower right of the ratchet ring 10, which makes it easier to ensure that the tip 21 of the pawl 20 does not hinder the rotation of the ratchet ring 10 and effectively prevents it from reversing, that is, it is easy to adjust its position and rotation direction.

[0032] In this embodiment, by installing the pawl 20 below the ratchet ring 10, on the one hand, it is convenient to adjust the position and rotation direction of the pawl 20, so that the tip 21 of the pawl 20 does not hinder the rotation of the ratchet ring 10 and can effectively prevent it from reversing. On the other hand, as the coupling 70 rotates, the coal powder and the like that fall into the ratchet root of the ratchet ring 10 are more likely to fall out when it rotates to the bottom, preventing contact and abutment with the tip 21 of the pawl 20, and further avoiding the accumulation of foreign matter such as coal powder at the ratchet root, further preventing the wear of the ratchet and the pawl 20, making the overall structure more durable, reliable and effective.

[0033] Alternatively, as Figure 1 As shown, one end of the pawl 20 facing away from the tip 21 is connected to a counterweight.

[0034] For example, Figure 1 As shown, the counterweight is another pawl 20. Of course, it is understandable that the counterweight can also be other components with a certain weight, such as iron blocks, steel plates, etc., as long as it can drive the tip 21 of the pawl 20 to always move upward around the rotation point of the pawl 20 and the base 30, no specific limitation is made here.

[0035] In this embodiment, a counterweight is provided at one end of the pawl 20 away from the tip 21. The counterweight can drive the tip 21 of the pawl 20 to always move upward around the rotation point of the pawl 20 and the base 30 by its own weight. That is, when the coal conveying equipment is operating normally, the ratchet ring 10 rotates normally accordingly, and the tip 21 of the pawl 20 is in sliding connection with the ratchet. Figure 1 As shown in the figure, the ratchet ring 10 rotates clockwise, and the rotation of one ratchet tooth will drive the tip 21 of the pawl 20 to rotate downward. At this time, the tip 21 of the pawl 20 can be pressed back by the weight of the counterweight, that is, it is driven to move upward and then return to between the two ratchets, ensuring that it is ready to abut the ratchet teeth at any time to prevent the ratchet ring 10 from reversing. The structural design is reasonable and ingenious, which improves the overall degree of automation and facilitates operation.

[0036] Alternatively, as Figure 1 As shown, the two ends of the two pawls 20 facing away from the tip 21 are connected to each other, wherein one of the pawls 20 is rotatably connected to the base 30 , and the other pawl 20 is used as a weight.

[0037] Specifically, the two pawls 20 have the same structure, which is convenient for production, and the rotational connection between the pawl 20 and the base 30 is a detachable connection, which is convenient for replacement and maintenance.

[0038] In this embodiment, two pawls 20 are provided, and the two ends of the two pawls 20 facing away from the tip 21 are connected to each other. One of the pawls 20 can be rotatably connected to the base 30 as an abutment member cooperating with the ratchet ring 10, and the other pawl 20 can be used as the above-mentioned counterweight, so that the structure is automatically effective. Moreover, after one of the pawls 20 is worn out after being used for a period of time, the connection between it and the base 30 can be released and the other pawl 20 serving as a weight can be directly installed on the base 30, which is more convenient to use and more convenient to maintain and repair.

[0039] Alternatively, as Figure 1 As shown, the two pawls 20 are arranged opposite to each other, and the two pawls 20 are welded together into one body.

[0040] Specifically, the two pawls 20 can also be integrally formed as one body. However, it should be noted that the pawls 20 are generally standard, which is convenient for procurement and production. Welding the two pawls 20 into one body is more convenient for production and saves costs.

[0041] In this embodiment, the two pawls 20 are welded together. On the one hand, the two pawls 20 are arranged opposite to each other. When one of the pawls 20 is worn, it is only necessary to turn the whole in one direction and connect the other pawl 20 to the base 30. This makes it easy to control the installation direction of the pawl 20 and makes maintenance faster and more convenient. On the other hand, connection through welding not only stabilizes the structure and improves usability, but also facilitates production and processing, saving costs.

[0042] Alternatively, as Figure 1 As shown, the base 30 includes a bottom plate 31 and a support rod 32 . The support rod 32 is connected to the bottom plate 31 and extends upward. The pawl 20 is rotatably connected to the upper end of the support rod 32 .

[0043] Specifically, the base plate 31 can be installed on a platform, bracket or other base of the coal conveying equipment near the ratchet ring 10 by welding, threaded connection or the like. The support rod 32 and the base plate 31 can also be connected by welding, threaded connection or the like, and the size of the support rod 32 can be set according to the needs of the actual installation space.

[0044] In this embodiment, by setting the base 30 as a bottom plate 31 and a support rod 32 that are connected to each other, and extending the support rod 32 upward, and rotatably connecting the pawl 20 to the upper end of the support rod 32, on the one hand, the structural form of the bottom plate 31 and the support rod 32 is more convenient for installation and assembly, and on the other hand, the support rod 32 is extended upward to provide a reliable and effective installation space, that is, the pawl 20 has a rotatable space to prevent it from interfering with other components, and the structure is more reliable and stable.

[0045] Alternatively, as Figure 1 As shown, the coal conveyor belt check device further includes a bolt 40 , a connecting hole is provided at the upper end of the support rod 32 , and a rotating hole 22 is provided at the pawl 20 . The bolt 40 is used to pass through the connecting hole and the rotating hole 22 .

[0046] Specifically, the diameter of the rotating hole 22 on the pawl 20 is slightly larger than the diameter of the screw rod of the bolt 40, so that the bolt 40 serves as the rotating axis of the pawl 20, which neither hinders its rotation nor causes much shaking of the pawl 20. The structure is reasonable and reliable, and the bolt 40 and the support rod 32 can be fixed by nuts and washers, making the structure more stable and reliable.

[0047] In this embodiment, by providing a bolt 40 and passing it through the connecting hole on the support rod 32 and the rotating hole 22 on the pawl 20, the bolt 40 can not only serve as a connecting piece between the two, but also serve as an axis for the rotation of the pawl 20, which is convenient for connection and installation, as well as for disassembly and replacement, making it more convenient to use.

[0048] Alternatively, as Figure 1 As shown, the ratchet ring 10 includes two half-ring bodies with the same structure, the two half-ring bodies are respectively used to connect with the coupling 70, and the two half-ring bodies are spliced ​​together to form the ratchet ring 10.

[0049] Specifically, the ratchet ring 10 is in the shape of a circular ring as a whole, and the ratchet is arranged on its outer circular wall. Accordingly, the two half-ring bodies are both semi-circular ring structures, which is equivalent to cutting one ratchet ring 10 into two half-ring bodies along its diameter. After installation, the connection is tighter and more reliable.

[0050] In this embodiment, by setting the ratchet ring 10 as a structure of two half-rings, the overall installation of the ratchet ring 10 is facilitated, so that the ratchet ring 10 can be installed without having to remove the coupling 70 from the coal conveying equipment. The two half-rings can be directly installed on the coupling 70 that has been installed on the coal conveying equipment, which makes the installation faster and more convenient. At the same time, this structural form also facilitates the installation of the coal conveying belt check device in existing equipment.

[0051] Alternatively, as Figure 1 and Figure 2 As shown, the two half-ring bodies are respectively used to be welded to the outer wall of the large-diameter wheel rim of the coupling 70.

[0052] It should be noted that the coupling 70 has a portion with a larger diameter and a portion with a relatively smaller diameter, for example Figure 2 As shown in , the middle part of the coupling 70 has a larger diameter, generally called a rim, and its two ends have smaller diameters. The half ring body of the ratchet ring 10 in this embodiment is welded to the outer wall of the middle part of the coupling 70.

[0053] In this embodiment, by welding the two half-ring bodies to the outer wall of the large-diameter rim of the coupling 70, on the one hand, it is convenient for installation and assembly, and the welding operation is convenient, and the welding makes the overall connection structure more stable and firm. On the other hand, the ratchet ring 10 is installed on the large-diameter part of the coupling 70, which facilitates the coordinated use of the ratchet ring 10 and the pawl 20, and prevents the ratchet ring 10 from being installed in a part with a smaller structural space so that foreign objects are stuck in the root of the ratchet, making the check structure invalid, and thus the structure is more effective and reliable.

[0054] In addition, if Figure 1 and Figure 2 As shown, another embodiment of the present invention provides a coal conveying equipment, including a motor 50, a reducer 60, a coupling 70, a belt conveyor and a coal conveyor belt check device as described in any one of claims 1 to 9, wherein the motor 50 is driven and connected to the reducer 60, the reducer 60 is driven and connected to the roller 80 of the belt conveyor through the coupling 70, and the ratchet ring 10 of the coal conveyor belt check device is sleeved on the coupling 70.

[0055] In this embodiment, the coal conveying equipment provided in this embodiment is provided with a motor 50, a reducer 60, a coupling 70, a belt conveyor and the above-mentioned coal conveying belt check device. The technical effects thereof are roughly the same as the technical effects of the above-mentioned coal conveying belt check device, which will not be repeated here. At the same time, by driving the motor 50 to connect the reducer 60, and driving the reducer 60 to the roller 80 of the belt conveyor through the coupling 70, the belt conveyor can be driven by the motor 50 to operate for coal conveying operations, and by sleeved the ratchet ring 10 of the coal conveying belt check device on the coupling 70, the ratchet ring 10 can be prevented from reversing, thereby preventing the belt conveyor from reversing, thereby improving the stability and reliability of the overall operation.

[0056] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A coal conveyor belt backstop device, characterized in that: The invention comprises a ratchet ring (10), a pawl (20) and a base (30), wherein the ratchet ring (10) is used to be sleeved on a coupling (70) between a reducer (60) and a roller (80) of a coal conveying device, the pawl (20) is rotatably connected to the base (30), the outer ring of the ratchet ring (10) is provided with continuous ratchet teeth, and the tip (21) of the pawl (20) is used to abut between two adjacent ratchet teeth.

2. The coal conveyor belt backstop device according to claim 1, characterized in that: The ratchet pawl (20) is located below the ratchet ring (10).

3. The coal conveyor belt backstop device according to claim 2, characterized in that: One end of the pawl (20) facing away from the tip (21) is connected to a counterweight.

4. The coal conveyor belt backstop device according to claim 2, characterized in that: Two ends of the two ratchets (20) facing away from the tip (21) are connected to each other, one of the ratchets (20) is rotatably connected to the base (30), and the other ratchets (20) is used as a weight.

5. The coal conveyor belt backstop device according to claim 3, characterized in that: The two ratchet pawls (20) are arranged opposite to each other, and the two ratchet pawls (20) are welded into one body.

6. The coal conveyor belt backstop device according to claim 2, characterized in that: The base (30) includes a bottom plate (31) and a support rod (32). The support rod (32) is connected to the bottom plate (31) and extends upward. The pawl (20) is rotatably connected to the upper end of the support rod (32).

7. The coal conveyor belt backstop device according to claim 6, characterized in that: The coal conveyor belt check device further comprises a bolt (40), a connecting hole is provided at the upper end of the support rod (32), a rotating hole (22) is provided at the pawl (20), and the bolt (40) is used to pass through the connecting hole and the rotating hole (22).

8. The coal conveyor belt backstop device according to claim 1, characterized in that: The ratchet ring (10) comprises two half-ring bodies with identical structures, the two half-ring bodies are respectively used to be connected to the coupling (70), and the two half-ring bodies are spliced ​​together to form the ratchet ring (10).

9. The coal conveyor belt backstop device according to claim 8, characterized in that: The two half-ring bodies are respectively used for welding to the outer wall of the large-diameter wheel rim of the coupling (70).

10. A coal conveying equipment, characterized in that: The invention comprises a motor (50), a reducer (60), a coupling (70), a belt conveyor and a coal conveyor belt check device as described in any one of claims 1 to 9, wherein the motor (50) is drivingly connected to the reducer (60), the reducer (60) is drivingly connected to the roller (80) of the belt conveyor through the coupling (70), and the ratchet ring (10) of the coal conveyor belt check device is sleeved on the coupling (70).

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