Coal breaking device

Abstract

The utility model provides a kind of coal crushing device, it is related to coal mine machinery technical field, the device includes first crushing mechanism, first transport mechanism, receiving bin and second crushing mechanism, first crushing mechanism is arranged in the first end close to first transport mechanism, receiving bin is arranged in the second end close to first transport mechanism, receiving bin includes cavity and with the first shunt passage and second shunt passage of cavity intercommunication, first shunt passage is connected with second crushing mechanism, and first shunt passage is provided with first valve, second shunt passage is provided with second valve. Through valve switch control shunt, and through the unified crushing of first crushing mechanism, and the multistage fine crushing of second crushing mechanism, the different granularity demand of coal of coal unit can be satisfied, without frequently replacing equipment or adjusting production line, significantly reduce operating time consumption in production peak period, greatly improve the production efficiency of coal crushing.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery technology, and in particular to a coal crushing device. Background Technology

[0002] After being mined, coal is typically large in size and varies in shape, thus requiring crushing equipment to process it to meet practical usage needs. In different scenarios such as daily use, heating, and power generation, coal-using units have varying requirements for coal particle size. Currently, mined coal is generally transported to different coal crushing devices to achieve different degrees of crushing, thereby meeting the different particle size requirements of various coal-using units.

[0003] However, the existing method requires multiple coal crushing devices, which increases production costs; and during peak production periods, operators need to frequently select between multiple coal crushing devices, which greatly affects production efficiency. Utility Model Content

[0004] This utility model provides a coal crushing device to solve the problem of low coal production efficiency in the prior art.

[0005] This utility model provides a coal crushing device, including: a first crushing mechanism, a first conveying mechanism, a receiving bin, and a second crushing mechanism. The first crushing mechanism is located at a first end near the first conveying mechanism, and the receiving bin is located at a second end near the first conveying mechanism. The receiving bin includes a cavity and a first diversion channel and a second diversion channel communicating with the cavity. The first diversion channel is connected to the second crushing mechanism, and a first valve is provided on the first diversion channel, and a second valve is provided on the second diversion channel.

[0006] The first crushing mechanism is used to crush coal into coal blocks of a first particle size range, and the first conveying mechanism is used to transport the coal blocks of the first particle size range to the cavity of the receiving hopper. When the first valve is in the open state and the second valve is in the closed state, the second crushing mechanism crushes the coal blocks of the first particle size range into coal blocks of a second particle size range. The second particle size range includes at least two sub-particle size ranges, and any one of the at least two sub-particle size ranges is smaller than the first particle size range.

[0007] Optionally, the second crushing mechanism includes a housing and a first crushing structure, a second crushing structure, and a driving unit disposed in the housing. The first crushing structure and the second crushing structure are spaced apart. At least one of the first crushing structure and the second crushing structure is provided with the driving unit. Under the driving action of the driving unit, the first crushing structure and the second crushing structure move towards each other or away from each other. One end of the first diversion channel is connected to the cavity, and the other end of the first diversion channel passes through the housing and is connected to the gap between the first crushing structure and the second crushing structure.

[0008] Optionally, the first crushing structure is a hammer ring, and the second crushing structure is a screen plate adapted to the first crushing structure. When the driving unit drives the first crushing structure to rotate in the forward direction, and / or the driving unit drives the second crushing structure to rotate in the reverse direction, the first crushing structure and the second crushing structure move towards each other.

[0009] Optionally, the hammer ring is provided with a first threaded protrusion, and the sieve plate is provided with a second threaded protrusion, wherein the first threaded protrusion and the second threaded protrusion are misaligned.

[0010] Optionally, it further includes an input module and a control module, wherein the input module, the first valve, and the second valve are all electrically connected to the control module. The input module is used to receive particle size information input by the user. When the particle size information indicates that the coal particle size is within the first particle size range, the control module controls the first valve to be in a closed state and controls the second valve to be in an open state. When the particle size information indicates that the coal particle size is within the second particle size range, the control module controls the first valve to be in an open state and controls the second valve to be in a closed state.

[0011] Optionally, the first valve has the same structure as the second valve. The first valve includes a first frame and a first valve plate. The first frame is embedded in the first diversion channel and a slide rail is provided on the first frame. The first valve plate is disposed in the slide rail and is slidably connected to the first frame through the slide rail. When the first valve plate is completely placed in the first frame, the first valve is in the closed state.

[0012] Optionally, it further includes: a second transport mechanism, wherein the discharge port of the second crushing mechanism and the discharge port of the second diversion channel both face the second transport mechanism.

[0013] Optionally, both the conveyor belt of the first transport mechanism and the conveyor belt of the second transport mechanism are provided with anti-slip structures.

[0014] Optionally, an inspection port is provided at preset intervals on the second diversion channel, and the inspection port is provided with tempered glass.

[0015] Optionally, both the first diversion channel and the second diversion channel are located at the bottom of the receiving bin.

[0016] In this embodiment of the invention, the mined coal is first crushed into coal blocks of a first particle size range using a first crushing mechanism for easier subsequent processing. Then, the coal blocks of the first particle size range are transported to a receiving silo via a first transport mechanism. The receiving silo acts as a buffer unit, allowing for flexible diversion of coal blocks according to downstream demand via a first diversion channel, a second diversion channel, and corresponding valves. When coal blocks smaller than the first particle size range are needed, the second valve is closed and the first valve is opened, allowing the coal blocks of the first particle size range to enter the second crushing mechanism. The processing parameters of the second crushing mechanism are adjusted to achieve crushing of different sub-particle size ranges, avoiding downtime caused by equipment replacement. When coal blocks of the first particle size range are needed, the first valve is closed and the second valve is opened, allowing the coal blocks of the first particle size range to be collected directly through the second diversion channel. Thus, by controlling the diversion through valve switching, and through the uniform crushing of the first crushing mechanism and the multi-stage fine crushing of the second crushing mechanism, the different particle size requirements of coal-using units can be met without frequent equipment replacement or production line adjustments. This significantly reduces operation time during peak production periods and greatly improves the production efficiency of coal crushing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the coal crushing device provided in this embodiment of the utility model;

[0019] Figure 2 This is the second structural schematic diagram of the coal crushing device provided in this embodiment of the utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0021] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such usage can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] like Figures 1 to 2 As shown, this utility model embodiment provides a coal crushing device, including: a first crushing mechanism, a first conveying mechanism 10, a receiving bin 20, and a second crushing mechanism 30. The first crushing mechanism is located at a first end near the first conveying mechanism 10, and the receiving bin 20 is located at a second end near the first conveying mechanism 10. The receiving bin 20 includes a cavity 201 and a first diversion channel 202 and a second diversion channel 203 communicating with the cavity 201. The first diversion channel 202 is connected to the second crushing mechanism 30, and a first valve 2021 is provided on the first diversion channel 202, and a second valve 2031 is provided on the second diversion channel 203.

[0023] The first crushing mechanism is used to crush coal into coal blocks of a first particle size range. The first conveying mechanism 10 is used to transport the coal blocks of the first particle size range to the cavity 201 of the receiving bin 20. When the first valve 2021 is in the open state and the second valve 2031 is in the closed state, the second crushing mechanism 30 crushes the coal blocks of the first particle size range into coal blocks of a second particle size range. The second particle size range includes at least two sub-particle size ranges, and any one of the at least two sub-particle size ranges is smaller than the first particle size range.

[0024] In one example, if coal lumps smaller than the first particle size range are needed, the second valve is closed and the first valve is opened, allowing the coal lumps of the first particle size range to enter the second crushing mechanism 30 through the first diversion channel 202. By adjusting the processing parameters of the second crushing mechanism 30 (such as crushing gap, rotation speed, etc.), the coal lumps of the first particle size range can be crushed into smaller coal lumps of the second particle size range without replacing the equipment. For example, the second crushing mechanism can produce coarse particles (first sub-particle size range) or fine particles (second sub-particle size range) of coal lumps by adjusting the spacing between the crushing structures, which can meet the crushing requirements of different sub-particle size ranges in coal lumps smaller than the first particle size range, avoiding the downtime caused by equipment replacement in the prior art.

[0025] In another example, if coal pieces of the first particle size range are needed, the first valve is closed and the second valve is opened, so that coal pieces of the first particle size range are collected directly through the second diversion channel 203. Different crushing degrees can be switched by opening and closing the first and second valves, without the need to frequently change equipment or adjust the production line. Especially during peak production periods, this can significantly reduce operation time and improve production efficiency.

[0026] In this embodiment, the mined coal is first crushed into coal blocks of a first particle size range using a first crushing mechanism to facilitate subsequent processing. Then, the coal blocks of the first particle size range are transported to a receiving silo 20 via a first transport mechanism 10. The receiving silo 20 acts as a buffer unit and can flexibly divert the coal blocks according to downstream demand through a first diversion channel 202, a second diversion channel 203, and corresponding valves. When coal blocks smaller than the first particle size range are needed, the second valve 2031 is closed and the first valve 2021 is opened, allowing the coal blocks of the first particle size range to enter the second crushing mechanism 30. The processing parameters of the second crushing mechanism 30 are then adjusted (e.g., crushing...). By adjusting the gap, rotation speed, etc., different particle size ranges can be crushed, avoiding downtime caused by equipment replacement. When coal blocks of the first particle size range are needed, the first valve 2021 is closed and the second valve 2031 is opened, allowing the coal blocks of the first particle size range to be collected directly through the second diversion channel 203. In this way, by controlling the diversion through valve switching, and through the unified crushing of the first crushing mechanism and the multi-stage fine crushing of the second crushing mechanism 30, the different particle size requirements of coal users can be met. There is no need to frequently replace equipment or adjust the production line. During peak production periods, the operation time is significantly reduced, and the production efficiency of coal crushing is greatly improved.

[0027] The second crushing mechanism 30 includes a housing and a first crushing structure, a second crushing structure, and a driving unit disposed in the housing. The first crushing structure and the second crushing structure are spaced apart. At least one of the first crushing structure and the second crushing structure is provided with the driving unit. Under the driving action of the driving unit, the first crushing structure and the second crushing structure move towards each other or away from each other. One end of the first diversion channel is connected to the cavity, and the other end of the first diversion channel passes through the housing and is connected to the gap between the first crushing structure and the second crushing structure.

[0028] In this embodiment, the shell serves as the frame of the second crushing mechanism, providing a stable installation space and operational protection for the first crushing structure, the second crushing structure, and the drive unit housed within the shell. The first and second crushing structures are spaced apart to form a working area for crushing coal blocks. To achieve different degrees of crushing of the coal blocks, at least one of the first and second crushing structures is equipped with a drive unit. The drive unit provides power to the crushing structures, allowing the first and second crushing structures to move towards or away from each other, thereby flexibly adjusting the gap between them to meet the crushing requirements of coal blocks with different particle sizes. For example, the first crushing structure is equipped with a drive unit, which drives the first crushing structure to move towards the second crushing structure; or, the second crushing structure is equipped with a drive unit, which drives the second crushing structure to move towards the first crushing structure; or, both the first and second crushing structures are equipped with drive units, and the corresponding drive units on the first and second crushing structures drive the first and second crushing structures to move towards each other, all of which can achieve the crushing of the coal blocks. In the coal transport path, the first diversion channel 202 of the receiving bin 20 is connected to the cavity 201 at one end, receiving coal blocks of the first particle size range delivered by the first transport mechanism 10. The other end passes through the shell, precisely aligning with the gap between the first and second crushing structures, allowing the coal blocks to smoothly enter the working area for crushing. Under the action of the crushing structures, they are crushed into smaller particles (the second particle size range), thus meeting the diverse particle size requirements of different coal-using units. This eliminates the need for frequent equipment changes or production line adjustments, significantly reducing operation time during peak production periods and greatly improving the production efficiency of coal crushing.

[0029] Optionally, the first crushing structure is a hammer ring, and the second crushing structure is a screen plate adapted to the first crushing structure. When the driving unit drives the first crushing structure to rotate in the forward direction, and / or the driving unit drives the second crushing structure to rotate in the reverse direction, the first crushing structure and the second crushing structure move towards each other.

[0030] In this embodiment, the first crushing structure employs a hammer ring, which generates an axial force during rotation. Correspondingly, the second crushing structure is designed as a screen plate adapted to the first crushing structure. The two structures match each other in shape and size, forming a mortise-and-tenon-like interlocking structure. The drive unit, as a power source, can have diverse driving modes. It can drive the first crushing structure to rotate forward independently, drive the second crushing structure to rotate in the opposite direction independently, or drive both structures to rotate forward and in the opposite direction simultaneously. When the drive unit is activated, based on the geometric characteristics of the hammer ring and screen plate, as the first crushing structure rotates forward, or the second crushing structure rotates in the opposite direction, or both rotate in opposite directions simultaneously, relative rotational friction is generated between the first and second crushing structures, causing the first crushing structure to gradually penetrate deeper into the screen plate of the second crushing structure. During this process, the coal blocks conveyed from the first diversion channel 202 of the receiving bin 20 are sandwiched between the first and second crushing structures, bearing the shearing force, extrusion force, and gradually increasing compressive force generated by their opposing movement, thereby achieving the purpose of crushing the coal blocks into smaller particles. In this way, the design of crushing coal by combining the hammer ring with the rotational motion can crush coal more efficiently. At the same time, by adjusting the drive mode and speed of the drive unit, the degree of crushing can be flexibly controlled to meet the different needs of coal users for coal particle size.

[0031] Optionally, the hammer ring is provided with a first threaded protrusion, and the sieve plate is provided with a second threaded protrusion, wherein the first threaded protrusion and the second threaded protrusion are misaligned.

[0032] In this embodiment, the hammer ring of the first crushing structure and the screen plate of the second crushing structure are respectively provided with a first threaded protrusion and a second threaded protrusion, which are staggered and distributed. This further enhances the crushing effect on the coal block when the first and second crushing structures move towards each other. When the coal block enters between the first and second crushing structures, the staggered threaded protrusions apply multi-directional shearing and tearing forces to the coal block during the compression process. This causes the coal block to not only be compressed but also to twist and tear due to the staggered engagement of the threaded protrusions. Compared with a smooth compression surface, this method can crush the coal block into smaller particles more quickly and thoroughly. At the same time, the special structure of the threaded protrusions can also effectively crush coal blocks with different hardness and toughness, improving the adaptability of the crushing device to various coal types and the crushing efficiency.

[0033] In some alternative embodiments, the second crushing mechanism 30 includes a housing and a first crushing structure (i.e., a hammer ring), a second crushing structure (i.e., a screen plate), a first driving part, and a second driving part disposed in the housing. The first driving part is electrically connected to the hammer ring, and the second driving part is electrically connected to the screen plate. The first driving part is used to drive the hammer ring to rotate, and the second driving part is used to drive the screen plate to adjust its angle. The hammer ring and the screen plate are adapted to each other and are set with a relative gap. Under the driving action of the second driving part, the gap between the hammer ring and the screen plate is adjusted by adjusting the tilt angle of the screen plate. One end of the first diversion channel is connected to the cavity, and the other end of the first diversion channel passes through the housing and is connected to the gap between the hammer ring and the screen plate.

[0034] In this embodiment, the first drive unit is connected to the hammer ring, driving the hammer ring to rotate at high speed to crush coal blocks; the second drive unit is connected to the screen plate, and the tilt angle of the screen plate can be adjusted. The hammer ring and the screen plate are arranged opposite each other and maintain a certain gap, the size of which directly affects the crushed particle size of the coal blocks. When the coal blocks enter the shell from the first diversion channel of the receiving bin, they fall into the gap between the hammer ring and the screen plate. The high-speed rotating hammer ring crushes the coal blocks by impact, and the gap size can be changed by adjusting the angle of the screen plate through the second drive unit, thereby controlling the degree of crushing and the final particle size of the coal blocks. In this way, through the coordinated movement and precise adjustment of the mechanical structure, the coal crushing process is precisely controlled, which can meet the diverse needs of coal block particle size in different application scenarios.

[0035] Optionally, it further includes an input module and a control module. The input module, the first valve 2021, and the second valve 2031 are all electrically connected to the control module. The input module is used to receive particle size information input by the user. When the particle size information indicates that the coal particle size is within the first particle size range, the control module controls the first valve 2021 to be in a closed state and controls the second valve 2031 to be in an open state. When the particle size information indicates that the coal particle size is within the second particle size range, the control module controls the first valve 2021 to be in an open state and controls the second valve 2031 to be in a closed state.

[0036] In this embodiment, automated valve control is achieved through the addition of an input module and a control module. Specifically, the input module, the first valve 2021, and the second valve 2031 are all electrically connected to the control module. The user can directly input the required coal particle size information through the input module. When the input particle size information is within the first particle size range, the control module automatically issues a command to close the first valve 2021 on the first diversion channel 202 and simultaneously open the second valve 2031 on the second diversion channel 203, allowing the coal particles processed by the first crushing mechanism to be directly output from the second diversion channel 203. If the input particle size information is within the second particle size range, the control module controls the first valve 2021 to open and the second valve 2031 to close, guiding the coal particles into the second crushing mechanism 30 for secondary crushing. This transforms manual operation into intelligent control, avoids human error, reduces manpower input, and enables rapid switching of the crushing process, further improving the automation level and overall efficiency of coal crushing production.

[0037] Optionally, the first valve 2021 and the second valve 2031 have the same structure. The first valve 2021 includes a first frame and a first valve plate. The first frame is embedded in the first diversion channel 202 and a slide rail is provided on the first frame. The first valve plate is disposed in the slide rail and is slidably connected to the first frame through the slide rail. When the first valve plate is completely placed in the first frame, the first valve 2021 is in the closed state.

[0038] In this embodiment, the first valve 2021 and the second valve 2031 adopt the same structural design. Taking the first valve 2021 as an example, the first valve 2021 mainly consists of a first frame and a first valve plate. The first frame is embedded in the first diversion channel 202, serving a fixing and supporting function. The slide rail provided on the first frame provides a guiding path for the movement of the first valve plate. The first valve plate is installed in the slide rail and can slide freely along the slide rail within the first frame. When the first valve plate slides completely into the first frame, tightly fitting against the inner wall of the channel, completely blocking the passage path of coal blocks in the first diversion channel 202, the first valve is in the closed state. This sliding valve structure is simple and reliable. The valve can be quickly opened and closed by the linear sliding of the valve plate, facilitating remote control by the control module. It also makes the flow direction switching of coal blocks in the diversion channel more convenient and efficient, ensuring the smooth operation of the entire coal crushing process.

[0039] The second valve 2031 adopts the same structural design and can achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0040] Optionally, it also includes: a second transport mechanism 40, wherein the discharge port of the second crushing mechanism 30 and the discharge port of the second diversion channel 203 both face the second transport mechanism 40.

[0041] In this embodiment, both the discharge port of the second crushing mechanism 30 and the discharge port of the second diversion channel 203 of the receiving bin 20 are oriented towards the second conveying mechanism 40. This ensures that regardless of whether the coal blocks are formed into a second particle size range after secondary crushing by the second crushing mechanism 30, or are directly output from the first particle size range from the second diversion channel 203, they can all fall directly onto the second conveying mechanism. Through the unified conveying of the second conveying mechanism, centralized transportation and subsequent processing of coal blocks with different crushing degrees are achieved, simplifying the output path of the coal blocks, avoiding the cumbersome configuration of separate conveying equipment at different discharge ports, effectively improving the integration and transportation efficiency of the entire coal crushing system, and reducing equipment costs and management complexity.

[0042] Optionally, both the conveyor belt of the first transport mechanism and the conveyor belt of the second transport mechanism 40 are provided with anti-slip structures.

[0043] In this embodiment, during coal mining and crushing operations, coal blocks are characterized by irregular shapes, rough surfaces, and significant weight. If the conveyor belt surface friction is insufficient, the coal blocks are prone to slipping and rolling during transport, leading not only to coal spillage and material loss but also potential equipment malfunctions and even safety accidents. The anti-slip structure significantly increases the friction between the conveyor belt and the coal blocks, ensuring smooth movement of the coal blocks on the conveyor belt. Whether transporting uphill, turning, or at high speeds, the structure firmly supports the coal blocks, reducing the risk of material spillage and improving transport reliability. Simultaneously, it enhances the adaptability of the transport mechanism to coal blocks of different sizes and moisture content, ensuring continuous and efficient operation of the coal crushing process, reducing downtime and maintenance frequency due to material transport issues, and further improving overall production efficiency.

[0044] Optionally, the second diversion channel 203 is provided with an inspection port at preset intervals, and the inspection port is provided with tempered glass.

[0045] In this embodiment, an inspection port is set at predetermined intervals, and these inspection ports are covered with tempered glass. Tempered glass has high strength and impact resistance, effectively protecting the inspection ports from coal impact damage, while also providing good light transmission. Workers can observe the coal conveying status inside the channel through the glass and promptly detect abnormalities such as coal blockage or channel wall wear. If coal blockage or channel wall wear occurs, it can be cleared and maintained through the inspection port, avoiding the complete disassembly of the second diversion channel 203, reducing maintenance workload and time costs, ensuring smooth coal conveying, and thus improving the stability and reliability of the entire coal crushing device.

[0046] Optionally, both the first diversion channel 202 and the second diversion channel 203 are located at the bottom of the receiving bin 20.

[0047] Furthermore, the second diversion channel 203 is located at the top corner of the bottom of the receiving hopper 20, and its port is set at a certain angle to the bottom surface of the receiving hopper 20. Thus, when coal blocks of the first particle size range are needed, the first valve 2021 is closed and the second valve 2031 is opened, allowing the coal blocks of the first particle size range to be collected directly through the second diversion channel 203. When the first transport mechanism 10 delivers the coal blocks to the receiving hopper, the coal blocks fall naturally under gravity, maintaining a certain tendency to move due to inertia. The second diversion channel 203, located at the top corner and angled, perfectly matches the trajectory of the falling and moving coal blocks, allowing them to fall preferentially into the second diversion channel 203. No additional power device is needed to guide the coal blocks, reducing energy consumption and equipment costs, while ensuring the high efficiency and smoothness of coal block transportation, preventing coal blocks from accumulating and clogging in the receiving hopper, and ensuring the smooth operation of the coal crushing process.

[0048] In this embodiment, the gravity characteristics of coal and conveying efficiency are fully considered. Since coal has a certain weight, it will naturally settle at the bottom of the receiving hopper 20 under gravity. Arranging two diversion channels here allows coal to flow directly into the channels by its own weight, without the need for additional power, thus reducing energy consumption. At the same time, the bottom diversion channels prevent coal from forming dead zones in the receiving hopper, ensuring smooth material flow and preventing blockages. Furthermore, this makes the entire device structure more compact, reducing space waste caused by unreasonable channel layout, facilitating equipment installation, maintenance, and subsequent production management, and further improving the practicality and operational stability of the coal crushing device.

[0049] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this utility model is not limited to performing functions in the discussed order, but may also include performing functions substantially simultaneously or in the reverse order, for example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0050] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A coal crushing device, characterized in that, include: The system comprises a first crushing mechanism, a first conveying mechanism, a receiving bin, and a second crushing mechanism. The first crushing mechanism is located at a first end near the first conveying mechanism, and the receiving bin is located at a second end near the first conveying mechanism. The receiving bin includes a cavity and a first diversion channel and a second diversion channel communicating with the cavity. The first diversion channel is connected to the second crushing mechanism, and a first valve is provided on the first diversion channel, and a second valve is provided on the second diversion channel. The first crushing mechanism is used to crush coal into coal blocks of a first particle size range, and the first conveying mechanism is used to transport the coal blocks of the first particle size range to the cavity of the receiving hopper. When the first valve is in the open state and the second valve is in the closed state, the second crushing mechanism crushes the coal blocks of the first particle size range into coal blocks of a second particle size range. The second particle size range includes at least two sub-particle size ranges, and any one of the at least two sub-particle size ranges is smaller than the first particle size range.

2. The coal crushing device according to claim 1, characterized in that, The second crushing mechanism includes a housing and a first crushing structure, a second crushing structure, and a driving unit disposed in the housing. The first crushing structure and the second crushing structure are spaced apart. At least one of the first crushing structure and the second crushing structure is provided with the driving unit. Under the driving action of the driving unit, the first crushing structure and the second crushing structure move towards each other or away from each other. One end of the first diversion channel is connected to the cavity, and the other end of the first diversion channel passes through the housing and is connected to the gap between the first crushing structure and the second crushing structure.

3. The coal crushing device according to claim 2, characterized in that, The first crushing structure is a hammer ring, and the second crushing structure is a screen plate adapted to the first crushing structure. When the driving part drives the first crushing structure to rotate in the forward direction, and / or the driving part drives the second crushing structure to rotate in the reverse direction, the first crushing structure and the second crushing structure move towards each other.

4. The coal crushing device according to claim 3, characterized in that, The hammer ring is provided with a first threaded protrusion, and the screen plate is provided with a second threaded protrusion, with the first threaded protrusion and the second threaded protrusion being misaligned.

5. The coal crushing device according to claim 1, characterized in that, Also includes: The system includes an input module and a control module. The input module, the first valve, and the second valve are all electrically connected to the control module. The input module receives particle size information input by the user. When the particle size information indicates that the coal particle size is within the first particle size range, the control module controls the first valve to be closed and the second valve to be open. When the particle size information indicates that the coal particle size is within the second particle size range, the control module controls the first valve to be open and the second valve to be closed.

6. The coal crushing device according to claim 1, characterized in that, The first valve has the same structure as the second valve. The first valve includes a first frame and a first valve plate. The first frame is embedded in the first diversion channel and a slide rail is provided on the first frame. The first valve plate is disposed in the slide rail and is slidably connected to the first frame through the slide rail. When the first valve plate is completely placed in the first frame, the first valve is in the closed state.

7. The coal crushing device according to claim 1, characterized in that, Also includes: The discharge port of the second transport mechanism, the discharge port of the second crushing mechanism, and the discharge port of the second diversion channel both face the second transport mechanism.

8. The coal crushing device according to claim 7, characterized in that, Both the conveyor belts of the first and second transportation mechanisms are equipped with anti-slip structures.

9. The coal crushing device according to claim 1, characterized in that, The second diversion channel is provided with an inspection port at preset intervals, and the inspection port is provided with tempered glass.

10. The coal crushing device according to claim 1, characterized in that, Both the first diversion channel and the second diversion channel are located at the bottom of the receiving hopper.

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