Coal mine self-crushing coal breaking conveying system and coal breaking control method

Abstract

The invention discloses a coal mine self-crushing coal breaking conveying system and a coal breaking control method. The coal mine self-crushing coal breaking and conveying system comprises a reversed loader, a scraper and a coal breaking device, coal briquettes conveyed by the scraper are transferred to the reversed loader, the coal breaking device is erected on the reversed loader, the coal breaking device is adjacent to the output end of the scraper, the coal breaking device comprises a supporting part, an executing part and a stamping part, the supporting part is connected with the reversed loader, the executing part is arranged on the supporting part, and the stamping part is arranged on the executing part. The stamping part is connected with the executing part, and the executing part drives the stamping part to move so as to extrude and crush the large coal transferred by the reversed loader. According to the coal mine self-crushing coal crushing and conveying system, by introducing the coal crushing device, manual intervention can be reduced, and the automation level is improved. Large coal is extruded and crushed through the coal crushing device, the situation that the reversed loader is blocked can be reduced, and therefore the shutdown frequency is reduced, and the production efficiency is improved. In addition, potential safety hazards can be reduced through automatic coal breaking, and manual operation in a dangerous environment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining, and in particular to a coal mine self-pressure coal breaking and conveying system and a coal breaking control method. BACKGROUND

[0002] In the process of mining a medium-low hardness coal seam, the characteristics of low hardness and loose structure of the coal seam cause large lump coal to directly fall off to the scraper conveyor in the working roadway during the mining of the working face, and is conveyed to the reclaimer in the transport roadway through the scraper conveyor. However, the large lump coal entering the reclaimer can easily cause a coal burst, and frequent shutdowns are required for manual breaking and cleaning. This phenomenon not only increases production costs, but also causes safety hazards and low efficiency and other problems.

[0003] In related technologies, manual coal breaking requires shutdown operations, and the following main problems exist: first, frequent shutdowns cause a decrease in production efficiency, resulting in significant economic losses; second, the working environment is dangerous, and there are safety hazards such as coal wall spalling, equipment misstart, and improper use of tools; third, the labor intensity is high, the tool efficiency is low, and the working environment is harsh, which seriously affects the operation efficiency and the health of workers. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art.

[0005] To this end, an embodiment of the present application proposes a coal mine self-pressure coal breaking and conveying system, which effectively solves the problem of coal burst caused by large lump coal in the process of mining a medium-low hardness coal seam.

[0006] The coal mine self-pressure coal breaking and conveying system of the present application embodiment comprises:

[0007] a reclaimer, at least a part of which is arranged in the transport roadway underground;

[0008] a scraper conveyor, at least a part of which is arranged in the working roadway underground, and the output end of the scraper conveyor is overlapped above the reclaimer, so that the coal blocks transported by the scraper conveyor are transferred to the reclaimer;

[0009] a coal breaking device, which is arranged on the reclaimer, is adjacent to the output end of the scraper conveyor, and comprises a support part, an execution part, and a stamping part, the support part is connected with the reclaimer, the execution part is arranged on the support part, and the stamping part is connected with the execution part, and the stamping part is driven to move by the execution part to extrude and break the large lump coal transferred by the reclaimer.

[0010] The coal mine self-pressurizing coal crushing and conveying system of this invention, by introducing a coal crushing device, can reduce manual intervention and improve the level of automation. By crushing large pieces of coal through the crushing device, blockages in the transfer conveyor can be reduced, thereby reducing downtime and improving production efficiency. Furthermore, automated coal crushing can reduce safety hazards and decrease manual operation in hazardous environments.

[0011] In some embodiments, the actuator includes an explosion-proof motor and a drum. The explosion-proof motor is connected to the drum, and the stamping part is disposed on the outer peripheral surface of the drum. The explosion-proof motor drives the drum to rotate so as to drive the stamping part to break the coal.

[0012] In some embodiments, the stamping section includes a plurality of cutting teeth, which are spirally arranged on the outer circumferential surface of the roller along the axial direction of the roller.

[0013] In some embodiments, the support includes a base plate, the base plate being U-shaped, the orientation of the U-shaped opening of the base plate being opposite to the coal flow direction of the transfer machine, and the roller being rotatably disposed within the U-shaped opening of the base plate, the axial direction of the roller being perpendicular to the coal flow direction of the transfer machine.

[0014] In some embodiments, the base plate is provided with a plurality of clearance grooves arranged at intervals, the spacing direction of the plurality of clearance grooves being parallel to the axial direction of the roller, and the clearance grooves corresponding to the positions of the cutting teeth.

[0015] In some embodiments, the support portion further includes a side plate, the side plate being U-shaped, the orientation of the U-shaped opening of the side plate being opposite to the coal flow direction of the transfer machine, the bottom plate being disposed within the U-shaped opening of the side plate, the outer peripheral surface of the bottom plate being connected to the inner peripheral surface of the side plate, the two oppositely arranged walls of the side plate being respectively provided with mounting holes, and the side plate being provided with lugs corresponding to the mounting holes one by one.

[0016] In some embodiments, the support portion further includes a cover plate disposed within the U-shaped opening of the side plate, the cover plate being detachably connected to the side plate, and the cover plate being spaced apart from the bottom plate.

[0017] In some embodiments, the coal mine self-pressurized coal crushing and conveying system further includes a control module, which is connected to the coal crushing device and controls the operation of the coal crushing device.

[0018] The embodiments of the present invention also propose a coal breaking control method, which is applicable to the coal mine self-pressurized coal breaking and conveying system described in the above embodiments.

[0019] The coal crushing control method of this invention includes:

[0020] The flow rate and size of large coal pieces are monitored in real time by coal flow monitoring sensors installed on the transfer machine.

[0021] When the size of large coal pieces exceeds a preset threshold, the start signal of the coal crushing device is triggered.

[0022] The control module of the coal crushing device dynamically adjusts the rotational speed and pressure parameters of the drum based on the size of the large coal pieces and the coal flow rate.

[0023] During the coal crushing process, the coal crushing status is monitored in real time by vibration sensors and pressure sensors. If abnormal vibration or overload pressure is detected, the drum speed is automatically reduced or the coal crushing device is stopped.

[0024] After the coal breaking is completed, the control module automatically shuts down the coal breaking device and restores the normal operation of the transfer machine based on the coal flow recovery status.

[0025] In some embodiments, during the operation of the coal breaking device, the coal breaking status and coal flow data are transmitted to the mine monitoring center via a wireless communication module. When debris is detected in the coal flow, an emergency shutdown procedure is triggered and an alarm signal is issued. Attached Figure Description

[0026] Figure 1 This is an underground schematic diagram of a coal mine self-pressurized coal crushing and conveying system according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of a coal mine self-pressurized coal crushing and conveying system according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the coal crushing device according to an embodiment of the present invention.

[0029] Figure 4 This is a top view schematic diagram of the coal crushing device according to an embodiment of the present invention.

[0030] Figure 5 This is an explosion diagram of the coal crushing device according to an embodiment of the present invention.

[0031] Figure label:

[0032] 1-Support section, 11-Base plate, 111-Allowing groove, 12-Side plate, 121-Mounting hole, 122-Lumber, 13-Cover plate

[0033] 2-Actuator, 21-Drum,

[0034] 3-Stamping section, 31-Cutting tooth,

[0035] 10 - Transfer conveyor, 20 - Scraper conveyor, 30 - Coal crushing device

[0036] 100 - Transport lane, 200 - Working lane. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The coal mine self-pressurized coal crushing and conveying system of the present invention is described below with reference to the accompanying drawings.

[0039] like Figures 1 to 5 As shown, the coal mine self-pressurized coal crushing and conveying system of this embodiment includes: a transfer conveyor 10, a scraper conveyor 20, and a coal crushing device 30.

[0040] At least a portion of the transfer machine 10 is located in the underground transport roadway 100, and at least a portion of the scraper conveyor 20 is located in the underground working roadway 200. The output end of the scraper conveyor 20 is connected above the transfer machine 10.

[0041] The scraper conveyor 20 is responsible for transporting the coal blocks mined from the working face to above the transfer conveyor 10, and transferring the coal blocks to the transfer conveyor 10 by overlapping. The transfer conveyor 10 is responsible for receiving the coal blocks transferred from the scraper conveyor 20 and transporting them to the subsequent conveying system.

[0042] In this embodiment of the invention, the transfer conveyor 10 is not only the core equipment for transporting coal, but also serves as a support for the installation of the coal crushing device 30. The coal crushing device 30 is mounted on the transfer conveyor 10, adjacent to the output end of the scraper conveyor 20, and can crush large pieces of coal entering the transfer conveyor 10 in real time, avoiding the problem of clogging caused by large pieces of coal.

[0043] The coal crushing device 30 is mounted on the transfer conveyor 10, and is located near the output end of the scraper conveyor 20. The coal crushing device 30 includes a support part 1, an execution part 2, and a pressing part 3. The support part 1 is connected to the transfer conveyor 10, the execution part 2 is located on the support part 1, and the pressing part 3 is connected to the execution part 2. The execution part 2 drives the pressing part 3 to move to crush the large pieces of coal being transferred by the transfer conveyor 10.

[0044] Support unit 1 provides a stable mounting foundation for execution unit 2 and stamping unit 3. The design of support unit 1 needs to take into account the structural characteristics of transfer conveyor 10 and the stress conditions of coal crushing device 30 to ensure the stability and reliability of the device.

[0045] Actuator 2 is responsible for driving the movement of stamping unit 3. Actuator 2 is usually driven by an electric motor or other power equipment and can dynamically adjust motion parameters (such as speed, pressure, etc.) according to the size and hardness of the coal block to achieve efficient coal breaking effect.

[0046] The stamping unit 3 is driven by the actuator 2 to crush large pieces of coal transferred by the transfer machine 10. The design of the stamping unit 3 needs to take into account the physical properties of the coal (such as hardness and shape) to ensure crushing effect while reducing equipment wear.

[0047] In related technologies, manual coal breaking operations require frequent interruptions to the production process, resulting in low production efficiency. The coal mine self-pressurized coal breaking and conveying system of this invention, through an automated coal breaking device 30, can break large pieces of coal in real time during the transfer of coal blocks to the transfer conveyor 10, reducing the number of downtimes caused by blockages and thus significantly improving production efficiency.

[0048] Frequent downtime not only affects production efficiency but also increases equipment maintenance and labor costs. By reducing downtime, this system can effectively reduce the additional costs associated with manual coal breaking operations and improve overall economic efficiency.

[0049] Manual coal breaking operations pose several safety hazards, such as coal wall spalling, equipment malfunctions, and improper tool use. The self-pressurized coal breaking and conveying system of this invention, through automated operation, reduces personnel exposure to hazardous environments, significantly lowers operational risks, and ensures worker safety.

[0050] Manual coal breaking requires workers to perform high-intensity labor in harsh environments, easily leading to fatigue and occupational diseases. The automated design of the self-pressurized coal breaking and conveying system in this invention reduces manual intervention, improves the workers' working environment, lowers labor intensity, and increases work efficiency.

[0051] The actuator 2 and the stamping part 3 of the coal crushing device 30 are designed to be dynamically adjusted according to coal blocks of different sizes and hardness, thereby improving the adaptability and flexibility of the system and ensuring that large coal blocks can be effectively crushed under different working conditions, reducing the phenomenon of slugging.

[0052] like Figures 3 to 5 As shown, in some embodiments, the actuator 2 includes an explosion-proof motor (not shown) and a drum 21. The explosion-proof motor is connected to the drum 21, and the stamping part 3 is disposed on the outer peripheral surface of the drum 21. The explosion-proof motor drives the drum 21 to rotate, thereby driving the stamping part 3 to break the coal. Furthermore, the stamping part 3 includes a plurality of cutting teeth 31, which are spirally arranged on the outer peripheral surface of the drum 21 along the axial direction of the drum 21.

[0053] Understandably, coal mines are already equipped with scraper conveyors and coal mining machines, and the rollers and cutting teeth on these machines are readily available resources. By taking the drive rollers from the tail of the scraper conveyor and the cutting teeth from the coal mining machine, and making simple modifications (such as welding the cutting teeth onto the rollers), the cost of purchasing new equipment can be saved, while also reducing the time required for equipment installation and commissioning.

[0054] The existing scraper conveyor rollers and coal mining machine cutting teeth have been used in coal mining environments for a long time and have been proven in practice to have high reliability and durability. Using them in the coal crushing device 30 can ensure the stable operation of the equipment in harsh environments and reduce downtime caused by equipment failure.

[0055] The drum 21 is driven to rotate by an explosion-proof motor, and the cutting teeth 31 are fixed to the outer circumference of the drum 21. When the drum 21 rotates, the cutting teeth 31 impact and shear the large coal pieces, which can quickly break the large coal pieces into smaller coal pieces. This rotary crushing method is more efficient than static compression or manual crushing, especially when dealing with hard coal seams or interbedded rock.

[0056] The cutting teeth 31 are spirally arranged along the axial direction of the drum 21. This arrangement enables multi-point and uniform crushing of coal blocks during the rotation of the drum 21. Compared with centralized crushing, this method can avoid equipment damage caused by local overload and extend the service life of the equipment.

[0057] like Figures 3 to 5 As shown, in some embodiments, the support 1 includes a base plate 11, which is U-shaped. The orientation of the U-shaped opening of the base plate 11 is opposite to the coal flow direction of the transfer machine 10, for example... Figure 3 The U-shaped opening of the bottom plate 11 faces forward, and the coal flows backward. The drum 21 is rotatably mounted within the U-shaped opening of the bottom plate 11, and the axis of the drum 21 is perpendicular to the coal flow direction of the transfer conveyor 10, for example... Figure 3 The axial direction of the middle roller 21 extends in the left-right direction.

[0058] The drum 21 faces the coal flow, and the cutting teeth 31 can directly impact and shear the coal blocks. This design allows for more thorough contact between the cutting teeth 31 and the coal blocks, enabling large coal blocks to be quickly broken into smaller ones, significantly improving crushing efficiency.

[0059] The axis of the drum 21 is perpendicular to the coal flow direction, which allows the cutting teeth 31 to apply greater impact and shearing forces in the coal flow direction. This design can better adapt to the movement trajectory of the coal flow, ensuring that the coal blocks are fully crushed when passing through the drum 21, and reducing the problem of clogging caused by excessively large coal blocks.

[0060] like Figure 4 and Figure 5 As shown, in some embodiments, the base plate 11 is provided with a plurality of clearance grooves 111 arranged at intervals. The spacing direction of the plurality of clearance grooves 111 is parallel to the axial direction of the roller 21, and the clearance grooves 111 correspond to the positions of the cutting teeth 31.

[0061] The clearance groove 111 provides sufficient space for the cutting teeth 31, ensuring that the cutting teeth 31 will not collide with the base plate 11 during the rotation of the drum 21. This not only reduces equipment wear but also avoids equipment failure caused by collisions, extending the service life of the equipment.

[0062] The design of the clearance groove 111 can reduce the size of the base plate 11. If the clearance groove 111 is not provided, the space behind the roller 21 needs to be increased, which will increase the distance in the front and rear directions of the base plate 11, thereby increasing the overall size of the coal crushing device 30, increasing the cost and the load-bearing burden of the transfer machine 10.

[0063] like Figures 3 to 5 As shown, in some embodiments, the support portion 1 further includes a side plate 12, which is U-shaped. The orientation of the U-shaped opening of the side plate 12 is opposite to the coal flow direction of the transfer machine 10. A bottom plate 11 is disposed within the U-shaped opening of the side plate 12, and the outer peripheral surface of the bottom plate 11 is fixedly connected to the inner peripheral surface of the side plate 12 by welding. Furthermore, the support portion 1 also includes a cover plate 13, which is disposed within the U-shaped opening of the side plate 12 and spaced apart from the bottom plate 11.

[0064] The side plate 12 and the cover plate 13 together partially cover the roller 21, preventing moving parts from being directly exposed and posing a safety hazard. Furthermore, during the coal breaking process, the cutting teeth 31 impact and shear large pieces of coal, which may generate flying coal chunks. The side plate 12 and the cover plate 13 can also effectively block coal chunks from splashing, improving safety.

[0065] The two opposite walls of the side plate 12 are respectively provided with mounting holes 121, and the side plate 12 is provided with lugs 122 corresponding to the mounting holes 121. The side plate 12 is mounted on the upper part of the transfer machine 10 by inserting steel sections into the mounting holes 121 on the left and right sides, and then further secured with bolts by drilling through holes in the steel sections corresponding to the lug holes 122.

[0066] The cover plate 13 is detachably connected to the side plate 12 to facilitate opening the cover plate 13 for cleaning and maintenance of internal components. For example, a support block is welded onto the side plate 12, and mounting holes corresponding to the positions of the cover plate 13 and the support block are made on them, so that the two are detachably connected by fasteners (bolts).

[0067] In some embodiments, the coal mine self-pressurized coal crushing and conveying system further includes a control module (not shown in the figure). The control module is connected to the coal crushing device 30. By controlling the operation of the coal crushing device 30 through the control module, the automation level and operating efficiency of the system can be significantly improved.

[0068] The following describes a coal breaking control method according to an embodiment of the present invention, which is applicable to the coal mine self-pressurized coal breaking and conveying system described in the above embodiments.

[0069] The coal crushing control method of this invention includes:

[0070] By installing coal flow monitoring sensors on the transfer machine 10, including but not limited to infrared sensors, laser sensors, or image recognition sensors, the flow rate of coal and the size of large coal pieces can be monitored in real time.

[0071] When the size of large coal pieces exceeds a preset threshold, the start signal of the coal breaking device 30 is triggered.

[0072] The control module of the coal crushing device 30 dynamically adjusts the rotational speed and pressure parameters of the drum 21 according to the size of the large coal pieces and the coal flow rate.

[0073] During the coal crushing process, the coal crushing status is monitored in real time by vibration sensors and pressure sensors. If abnormal vibration or overload pressure is detected, the speed of drum 21 is automatically reduced or the coal crushing device 30 is stopped.

[0074] After the coal breaking is completed, the control module automatically shuts down the coal breaking device 30 and restores the normal operation of the transfer machine 10 according to the coal flow recovery status.

[0075] Understandably, the coal flow monitoring sensors installed on the transfer conveyor 10 can monitor the coal flow rate and the size of large coal pieces in real time. This real-time monitoring capability ensures that the system can detect the presence of large coal pieces in a timely manner, preventing them from causing blockages after entering the transfer conveyor 10.

[0076] When the system detects that a large piece of coal exceeds a preset threshold size, it automatically triggers the start signal of the coal crushing device 30. This precise triggering mechanism avoids unnecessary equipment startup, reducing energy consumption and equipment wear.

[0077] The control module of the coal crushing device 30 dynamically adjusts the rotational speed and pressure parameters of the drum 21 based on the size of the large coal pieces and the coal flow rate. This intelligent dynamic adjustment ensures that the coal crushing device 30 achieves optimal coal crushing results under different operating conditions, improving efficiency while reducing energy waste.

[0078] By dynamically adjusting the rotational speed and pressure of the drum 21, the coal crushing device 30 can crush large coal pieces more efficiently, reduce conveying problems caused by excessively large coal pieces, and improve the overall operating efficiency of the conveying system.

[0079] During the coal breaking process, vibration and pressure sensors monitor the breaking status in real time. This real-time monitoring can promptly detect abnormalities, such as abnormal vibrations or overload pressure, ensuring the safe operation of the equipment.

[0080] When abnormal vibration or overload pressure is detected, the control module will automatically reduce the speed of drum 21 or stop the coal crushing device 30. This automatic response mechanism can effectively prevent equipment damage and accidents, ensuring operational safety.

[0081] After coal breaking is completed, the control module automatically shuts down the coal breaking device 30 and restores the transfer machine 10 to normal operation based on the coal flow recovery. This automated control reduces the need for manual intervention and improves the overall system operating efficiency. Through automated start-stop control, the system can quickly respond to changes in coal flow, reduce downtime caused by equipment start-ups and shutdowns, and improve production efficiency.

[0082] In some embodiments, during the operation of the coal breaking device 30, the coal breaking status and coal flow data are transmitted to the mine monitoring center via a wireless communication module. When debris is detected in the coal flow, an emergency shutdown procedure is triggered and an alarm signal is issued.

[0083] Through the wireless communication module, the mine monitoring center can receive the operating status and coal flow data of the coal breaking device 30 in real time. This allows managers to understand the equipment's operating status at any time, promptly identify potential problems, and avoid equipment failures or accidents caused by information delays.

[0084] Real-time data transmission provides the foundation for remote control and management. Managers can remotely monitor and adjust the coal breaking device 30 from the monitoring center, eliminating the need for frequent downhole inspections and improving management efficiency and safety.

[0085] The coal flow monitoring sensor can detect the presence of metallic foreign objects or other hard debris in the coal flow. When debris is detected, the system immediately triggers an emergency shutdown procedure, stopping the operation of the coal crushing device 30 to prevent jamming, damage, or even accidents caused by debris entering the equipment. By promptly detecting and handling debris in the coal flow, the system can effectively reduce the risk of equipment failure, extend equipment lifespan, and lower maintenance costs. The issuance of the emergency shutdown procedure and alarm signals can promptly remind relevant personnel to take measures to prevent equipment damage or personnel injury caused by debris, thereby improving operational safety.

[0086] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0090] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coal mine self-pressurized coal crushing and conveying system, characterized in that, include: A transfer machine, at least a portion of which is located in an underground transport tunnel; A scraper conveyor, at least a portion of which is located in the underground working roadway, with the output end of the scraper conveyor connected above the transfer conveyor to transfer the coal blocks transported by the scraper conveyor to the transfer conveyor; A coal crushing device is mounted on the transfer machine and is located near the output end of the scraper conveyor. The coal crushing device includes a support part, an execution part, and a stamping part. The support part is connected to the transfer machine, the execution part is located on the support part, and the stamping part is connected to the execution part. The execution part drives the stamping part to move to crush the large pieces of coal being transferred by the transfer machine.

2. The coal mine self-pressurized coal crushing and conveying system according to claim 1, characterized in that, The actuator includes an explosion-proof motor and a drum. The explosion-proof motor is connected to the drum. The stamping part is located on the outer circumferential surface of the drum. The explosion-proof motor drives the drum to rotate, thereby driving the stamping part to break the coal.

3. The coal mine self-pressurized coal crushing and conveying system according to claim 2, characterized in that, The stamping section includes multiple cutting teeth, which are spirally arranged on the outer circumferential surface of the roller along the axial direction of the roller.

4. The coal mine self-pressurized coal crushing and conveying system according to claim 3, characterized in that, The support includes a base plate, which is U-shaped. The orientation of the U-shaped opening of the base plate is opposite to the coal flow direction of the transfer machine. The roller is rotatably disposed within the U-shaped opening of the base plate, and the axial direction of the roller is perpendicular to the coal flow direction of the transfer machine.

5. The coal mine self-pressurized coal crushing and conveying system according to claim 4, characterized in that, The base plate is provided with a plurality of clearance grooves arranged at intervals, the spacing direction of the plurality of clearance grooves being parallel to the axial direction of the roller, and the clearance grooves corresponding to the positions of the cutting teeth.

6. The coal mine self-pressurized coal crushing and conveying system according to claim 4, characterized in that, The support also includes a side plate, which is U-shaped. The U-shaped opening of the side plate faces the opposite direction to the coal flow direction of the transfer machine. The bottom plate is located inside the U-shaped opening of the side plate. The outer peripheral surface of the bottom plate is connected to the inner peripheral surface of the side plate. The two opposite walls of the side plate are respectively provided with mounting holes. The side plate is provided with lugs that correspond one-to-one with the mounting holes.

7. The coal mine self-pressurized coal crushing and conveying system according to claim 6, characterized in that, The support also includes a cover plate, which is disposed in the U-shaped opening of the side plate. The cover plate is detachably connected to the side plate and is spaced apart from the bottom plate.

8. The coal mine self-pressurized coal crushing and conveying system according to claim 1, characterized in that, It also includes a control module, which is connected to the coal crushing device and controls the operation of the coal crushing device.

9. A method for controlling coal breaking, characterized in that, The coal breaking control method is applicable to the coal mine self-pressurized coal breaking and conveying system according to any one of claims 1-8, and the coal breaking control method includes: The flow rate and size of large coal pieces are monitored in real time by coal flow monitoring sensors installed on the transfer machine. When the size of large coal pieces exceeds a preset threshold, the start signal of the coal crushing device is triggered. The control module of the coal crushing device dynamically adjusts the rotational speed and pressure parameters of the drum based on the size of the large coal pieces and the coal flow rate. During the coal crushing process, the coal crushing status is monitored in real time by vibration sensors and pressure sensors. If abnormal vibration or overload pressure is detected, the drum speed is automatically reduced or the coal crushing device is stopped. After the coal breaking is completed, the control module automatically shuts down the coal breaking device and restores the normal operation of the transfer machine based on the coal flow recovery status.

10. The coal breaking control method according to claim 9, characterized in that, During operation, the coal breaking device transmits the coal breaking status and coal flow data to the mine monitoring center via a wireless communication module. When debris is detected in the coal flow, an emergency shutdown procedure is triggered and an alarm signal is issued.

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