Water spraying equipment for coal mines

Abstract

This application discloses a water spraying device for coal. The water spraying device includes a water inlet channel, a transmission component, a spraying component, a detection component, a control component, and a switching component. The transmission component has a transmission bearing surface on which coal is placed. The spraying component is at least partially disposed on the side of the transmission component facing the transmission bearing surface, and is used to spray water onto the coal on the transmission bearing surface. The other end of the spraying component is connected to the water inlet channel. The detection component is detachably disposed on the spraying component, with its detection end facing the transmission bearing surface, and is used to detect the presence of coal on the transmission bearing surface. One end of the control component is electrically connected to the detection component, and the other end of the control component is electrically connected to the switching component, and is used to control the on / off state of the switching component. The switching component is disposed on the spraying component and is used to control the on / off state of the spraying component. The solution of this application can reduce coal dust generated during the coal flow process.

Description

Technical Field

[0001] This application generally relates to the field of coal technology. More specifically, this application relates to a water spraying device for coal. Background Technology

[0002] In the production and operation of a coal plant, "coal flow" refers to the continuous flow of coal during mining, processing, and transportation. For example, after raw coal is hoisted from the mine, it undergoes crushing, screening, and transfer, and is then transported to storage silos or loading points via belt conveyors, chutes, and other equipment. Throughout this process, the coal moves in a continuous flow, and this dynamic process is called coal flow.

[0003] In existing technologies, during the flow of coal (such as during crushing, falling, and conveyor belt transport), collisions and friction between coal blocks generate a large amount of fine coal dust (particle size typically less than 10 micrometers). This dust is easily carried by the wind, forming airborne dust. By spraying water onto the coal flow, the moisture adheres to the surface of the coal dust particles, increasing their weight and making it difficult for them to float into the air, thus directly inhibiting dust diffusion. Furthermore, when airborne coal dust (especially respirable dust) is inhaled, it accumulates in the lungs, and long-term exposure may lead to occupational diseases such as pneumoconiosis, seriously endangering workers' health. Spraying water to suppress dust can significantly reduce the dust concentration in the working environment and reduce health risks. Moreover, coal dust is combustible dust. When the concentration of coal dust in the air reaches a certain range (for example, above 30-50 grams per cubic meter), and encounters open flames, high temperatures, or other ignition sources, a dust explosion may occur, with extremely serious consequences. Spraying water can reduce the explosive hazard at the source by wetting the coal dust and reducing its suspended concentration. Finally, coal dust spreading outside the factory area will pollute the surrounding atmosphere, soil, and water bodies, impacting the ecological environment. Spraying water can control dust within the production area, reducing its impact on the surrounding environment.

[0004] In view of this, there is an urgent need to provide a water spraying device for coal to reduce coal dust generated during coal flow. Utility Model Content

[0005] In order to at least solve one or more of the technical problems mentioned above, this application proposes a solution for a coal spraying device in one aspect.

[0006] In a first aspect, this application provides a coal spraying device, the spraying device including a water inlet channel, a transmission component, a spraying component, a detection component, a control component, and a switch component; wherein, the transmission component has a transmission bearing surface on which coal is placed for conveying the coal; the spraying component is at least partially disposed on the side of the transmission component facing the transmission bearing surface for spraying water onto the coal on the transmission bearing surface, and the other end of the spraying component is connected to the water inlet channel; the detection component is detachably disposed on the spraying component, and the detection end of the detection component faces the transmission bearing surface for detecting whether coal is present on the transmission bearing surface; one end of the control component is electrically connected to the detection component, and the other end of the control component is electrically connected to the switch component for controlling the on / off state of the switch component; the switch component is disposed on the spraying component for controlling the on / off state of the spraying component.

[0007] In some embodiments, the conveying component includes any one of a belt conveyor, a scraper conveyor, and a screw conveyor.

[0008] In some embodiments, the water spraying component includes a first water spray pipe, a second water spray pipe, and a nozzle component, wherein the first water spray pipe is disposed on the side of the transmission component facing the transmission bearing surface; one end of the second water spray pipe is connected to the first water spray pipe, and the other end of the second water spray pipe is connected to the water inlet channel; the nozzle component is disposed on the first water spray pipe, and the nozzle component is disposed facing the transmission bearing surface.

[0009] In some embodiments, the first water spray pipe includes a plurality of parallel first water spray sub-channels for spraying different positions on the conveying bearing surface.

[0010] In some embodiments, the switch component is disposed on the second water spray pipe.

[0011] In some embodiments, the detection component includes a distance sensor for detecting coal on the conveyor bearing surface.

[0012] In some embodiments, the detection component includes a vibration sensor and a flexible rod; the vibration sensor is disposed on the water spray component and electrically connected to the control component; one end of the flexible rod is detachably disposed on the vibration sensor, and the other end of the flexible rod is disposed toward the conveying bearing surface.

[0013] In some embodiments, the switching component includes an electrically controlled valve device.

[0014] The coal spraying device described above reduces coal dust generated during coal flow by incorporating a spraying component. Furthermore, the detection component can detect the presence of coal on the transmission component, enabling intelligent switching of the spraying component without human intervention. Moreover, by making the detection component detachable, it can be removed when dust suppression via spraying is no longer needed, avoiding the need to suspend the entire transmission component and dismantle the entire spraying component. Attached Figure Description

[0015] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 Exemplary block diagrams of a coal-sprinkling device according to some embodiments of this application are shown; Figure 2 Exemplary structural diagrams of a coal-sprinkling device according to other embodiments of this application are shown.

[0016] Tag Name 10 - Transmission component, 11 - Transmission bearing surface, 20 - Water spraying component, 21 - First water spraying pipe, 22 - Second water spraying pipe, 23 - Nozzle component, 30 - Detection component, 31 - Vibration sensor, 32 - Flexible rod, 40 - Control component, 50 - Switch component. Detailed Implementation

[0017] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0018] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0019] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0020] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0021] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0022] Figure 1 Exemplary block diagrams of a coal-sprinkling device according to some embodiments of this application are shown. Figure 2 Exemplary structural diagrams of a coal-sprinkling device according to other embodiments of this application are shown. For example... Figure 1 and Figure 2 As shown, the sprinkler system includes a water inlet channel, a transmission component 10, a spraying component 20, a detection component 30, a control component 40, and a switch component 50. The transmission component 10 has a transmission bearing surface 11 on which coal is placed for conveying the coal. The spraying component 20 is at least partially disposed on the side of the transmission component 10 facing the transmission bearing surface 11, for spraying water onto the coal on the transmission bearing surface 11. The other end of the spraying component 20 is connected to the water inlet channel. The detection component 30 is disposed on the spraying component 20, with its detection end facing the transmission bearing surface 11, for detecting the presence of coal on the transmission bearing surface 11. One end of the control component 40 is electrically connected to the detection component 30, and the other end is electrically connected to the switch component 50, for controlling the on / off state of the switch component 50. The switch component 50 is disposed on the spraying component 20 for controlling the on / off state of the spraying component 20.

[0023] In some embodiments, the detection component 30 includes a distance sensor for detecting coal on the conveying bearing surface 11.

[0024] The detection component 30 includes a vibration sensor 31 and a flexible rod 32; the vibration sensor is disposed on the water spray component 20 and is electrically connected to the control component 40; one end of the flexible rod 32 is detachably disposed on the vibration sensor, and the other end of the flexible rod is disposed toward the conveying bearing surface 11.

[0025] In some embodiments, the water inlet channel can be connected to a water supply system, which can deliver water from the water supply system to the sprinkler equipment.

[0026] In some embodiments, the conveying component 10 may have a conveying bearing surface 11. When it is necessary to convey coal, the coal can be conveyed onto the conveying bearing surface 11. The coal can be transferred by moving the conveying bearing surface 11.

[0027] In some embodiments, the conveying component 10 may include a belt conveyor, a scraper conveyor, and a screw conveyor.

[0028] Understandably, when the conveying component 10 is a belt conveyor, the conveying bearing surface 11 of the belt conveyor can move the coal. Since different coals have different sizes and weights, the friction between these coals and the conveying bearing surface 11, as well as the friction between the coals themselves, are different. During the conveying of these coals, different coals may move relative to each other and collide with each other, thereby generating a large amount of coal dust. This coal dust will form dust storms after being blown by the wind.

[0029] Furthermore, the transmission component 10 can be a scraper conveyor, which can consist of a trough, a scraper chain (which can be composed of scrapers and chain connected together, and is the key to traction and material conveying), a drive device (such as a motor, reducer, etc., which can be used to provide power), and a tensioning device (which can maintain chain tension).

[0030] In some embodiments, coal can be conveyed from the feed inlet of the scraper conveyor into the trough of the scraper conveyor. When the scraper conveyor is in operation, the drive unit drives the scraper chain to circulate within the trough. When coal falls onto the trough, the scraper chain, through the thrust of the scrapers, transports the coal forward along the trough, eventually reaching the scraper discharge outlet of the scraper conveyor for discharge. Compared to a conveyor belt, this method directly pushes the coal within the trough using scrapers, rather than relying on the friction of a conveyor belt. Understandably, because the scrapers push the coal within the trough, they continuously collide with the coal, generating a large amount of coal dust in the process. This coal dust is easily carried by the wind, forming dust storms.

[0031] Furthermore, the transmission component 10 can be a screw conveyor, which can consist of rotating helical blades and a fixed casing (trough). Coal is conveyed forward along the casing under the push of the blades. However, gaps often exist at the inlet, outlet, and casing joints of the screw conveyor. Coal particles (especially coal powder) are squeezed and rubbed during the conveying process, generating fine dust. In addition, the rotation of the helical blades will drive airflow, forming a local airflow that blows dust out from the gaps, creating dust.

[0032] In some embodiments, the water spray component 20 may be connected to the aforementioned water inlet channel, which can provide a water source for the water spray component 20. The water spray component 20 may include one or more water spray pipes, which may be at least partially disposed on the side of the transmission component 10 facing the transmission bearing surface 11. It is understood that the aforementioned water spray pipes may be at least partially disposed on the side of the transmission component 10 facing the transmission bearing surface 11, which may include the aforementioned water spray pipes at least partially coinciding with the projection of the transmission bearing surface 11 when projected in a direction perpendicular to the transmission bearing surface 11.

[0033] In some embodiments, the water spray pipe of the water spray component 20 may be provided with a plurality of water outlet holes, the axes of which, when extended, may intersect with the conveying bearing surface 11. In some embodiments, the axes of these water outlet holes may be parallel to each other or intersect each other.

[0034] In other embodiments, the water spray pipe of the water spray component 20 may be provided with multiple nozzle components. Similarly, the axes of the multiple nozzle components, when extended, may intersect with the conveying bearing surface 11. The axes of these nozzle components may be parallel to each other or intersect each other.

[0035] By setting multiple water outlets or multiple nozzle components on the water spraying component, and setting their axes to be parallel or intersecting, the water outlet angle of the water spraying component can be increased, thereby improving the spraying efficiency.

[0036] In some embodiments, the detection component 30 may include a sensor assembly that may be disposed on the water spray component 20. It is understood that the sensor assembly may be disposed among multiple water outlets or multiple nozzle components to prevent water sprayed from the water outlets or nozzle components from splashing onto the sensor assembly.

[0037] In some embodiments, the aforementioned sensor assembly may include a distance sensor and a vibration sensor 31. It is understood that the aforementioned distance sensor may be an ultrasonic sensor, which determines distance by emitting ultrasonic waves and measuring the time of the echo. The aforementioned distance sensor may also be an infrared sensor, which determines distance by emitting infrared light and measuring the intensity of the reflected light.

[0038] In some embodiments, when the sensor component is a distance sensor, a preset distance value can be determined based on the type of coal. It is understood that when the coal is fine coal, granular coal, small lump coal, medium-fast coal, or large lump coal, its size is different, and its stacking height on the transmission component 10 is also different. The preset distance value can be set based on the height of the coal stack. When the distance sensor detects that the distance between itself and the transmission component 10 is less than, greater than, or equal to the preset distance value, the detection result can be transmitted to the control component to determine whether coal is present on the transmission component 10. It is understood that when the distance sensor detects that the distance between itself and the transmission component 10 is less than or equal to the preset distance value, coal is present on the transmission component 10; when the distance sensor detects that the distance between itself and the transmission component 10 is greater than the preset distance value, no coal is present on the transmission component 10.

[0039] In some embodiments, when the sensor assembly is a vibration sensor 31, the detection component 30 may include the vibration sensor 31 and the flexible rod 32.

[0040] In some embodiments, the vibration sensor 31 may be disposed on the aforementioned water spray component 20. Further, the vibration sensor 31 may be disposed on the water spray pipe of the water spray component 20. When projected in a direction perpendicular to the conveying bearing surface 11, the aforementioned vibration sensor 31 may at least partially coincide with the projection of the conveying bearing surface 11.

[0041] In some embodiments, the vibration sensor 31 may be disposed among multiple water outlets or multiple nozzle components, thereby preventing water sprayed from the water outlets or nozzle components from splashing onto the sensor assembly. In some embodiments, the vibration sensor 31 may be electrically connected to the control component 40, and the vibration sensor 31 may transmit the detection results to the control component 40.

[0042] In some embodiments, one end of the flexible rod 32 can be detachably connected to the vibration sensor 31, and the other end of the flexible rod 32 can be arranged in a direction perpendicular to the conveying bearing surface 11. It is understood that the flexible rod 32 can be a telescopic rod, and its length can be determined according to the type of coal and the thickness of the coal stack. It is understood that by setting the length of the flexible rod 32, when coal is stacked on the conveying bearing surface 11, the coal can touch the flexible rod 32, causing it to vibrate. The vibration sensor 31 connected to the flexible rod 32 can detect these vibrations and thus transmit signals to the control components.

[0043] Furthermore, the aforementioned flexible rod 32 can be rotatably connected to the vibration sensor 31. For example, the flexible rod 32 can be connected to the vibration sensor 31 via a hinge. Specifically, the housing of the vibration sensor 31 can be provided with a pin perpendicular to the conveying bearing surface 11 and perpendicular to the conveying direction of the conveying component. The aforementioned flexible rod 32 can be sleeved on the outside of the aforementioned pin and can rotate along the axis of the pin, so that when coal is piled on the conveying bearing surface 11, the coal can touch the flexible rod 32, the flexible rod 32 can rotate around the pin, and can transmit vibration to the vibration sensor 31, and can transmit signals to the control component. It is understood that the conveying direction of the aforementioned conveying component can be parallel to the surface of the conveying bearing surface 11 (i.e., Figure 2 (The direction is towards the left and right).

[0044] In some embodiments, one end of the control component 40 may be electrically connected to the detection component 30, and the other end of the control component 40 may be electrically connected to the switch component 50.

[0045] Understandably, the control unit 40 can control the switching unit 50 based on the detection results of the detection unit 30. Specifically, when the detection unit 30 detects coal piled on the conveyor bearing surface 11, it can transmit the result to the control unit 40. At this time, the control unit 40 can control the switch unit 50 to be in the connected state, allowing water in the water inlet channel to flow into the spraying unit 20, thereby spraying the coal on the conveyor bearing surface 11. When the detection unit 30 detects no coal or very little coal on the conveyor bearing surface 11, it can transmit the result to the control unit 40. At this time, the control unit 40 can control the switch unit 50 to be in the disconnected state, preventing water in the water inlet channel from flowing into the spraying unit 20, thus disconnecting the spraying operation of the spraying unit 20 on the conveyor bearing surface, thereby saving water resources.

[0046] In some embodiments, the switching component 50 includes an electrically controlled valve device.

[0047] In some embodiments, the aforementioned switching component 50 may be disposed on the water spray component. The switching component may include an electrically controlled valve, which may include a valve body and an actuator. In some embodiments, the aforementioned valve body may include structures such as ball valves, butterfly valves, solenoid valves, and gate valves, which can be used to cut off or regulate water flow. In some embodiments, the actuator may be an electromagnet, a motor, or a servo motor.

[0048] In some embodiments, when the aforementioned electrically controlled valve is a solenoid valve, after the aforementioned switching component 50 receives the control signal from the control component 40, the coil of the solenoid valve can be energized, thereby generating a magnetic field, which in turn causes the iron core of the solenoid valve to move, thereby opening or closing the valve, and thus realizing the on / off switching of the water spray component.

[0049] It is understandable that when coal is carried on the conveyor bearing surface 11, it can be detected by the sensor (such as distance sensor or vibration sensor 31) of the detection component 30, and then the signal can be transmitted to the control component 40. At this time, the control component 40 can send a control signal to the switch component 50, so that the switch component 50 is connected, thereby allowing the water in the water inlet channel to flow into the water spraying component 20, and then the spraying operation can be performed.

[0050] The solution proposed in this application allows for the detection of coal presence on the transmission component via a detection unit, enabling intelligent switching of the water spray component without human intervention. Furthermore, by making the detection unit detachable, it can be easily removed when dust suppression spraying is no longer required for the coal on the transmission component, avoiding the need to suspend the entire transmission component and dismantle the entire water spray component.

[0051] In some embodiments, the conveying component 10 includes any one of a belt conveyor, a scraper conveyor, and a screw conveyor.

[0052] In some embodiments, when the conveying component 10 is a belt conveyor, the conveying bearing surface 11 of the belt conveyor can move the coal. Since different coals have different sizes and weights, the friction between these coals and the conveying bearing surface 11, as well as the friction between coals, are different. During the conveying of these coals, different coals may move relative to each other and collide with each other, thereby generating a large amount of coal dust. This coal dust will form dust storms after being blown by the wind.

[0053] In some embodiments, when the conveying component 10 is a scraper conveyor, the scraper conveyor may consist of a trough, a scraper chain, a drive unit, a tensioning device, etc. It is understood that coal can be conveyed from the feed inlet of the scraper conveyor into the trough. When the scraper conveyor is in operation, the drive unit drives the scraper chain to circulate within the trough. When coal falls onto the trough, the scraper chain, through the thrust of the scrapers, transports the coal forward along the trough, eventually reaching the scraper discharge outlet and being discharged outwards. Compared to a conveyor belt, it directly pushes the coal within the trough using scrapers, rather than relying on the friction of a conveyor belt. It is understood that because the scrapers push the coal within the trough, they continuously collide with the coal, generating a large amount of coal dust in the process. This coal dust is easily carried by the wind, forming dust storms.

[0054] In some embodiments, when the conveying component 10 is a screw conveyor, the screw conveyor can consist of rotating helical blades and a fixed casing (trough). Coal is conveyed forward along the casing under the push of the blades. It is understood that gaps often exist at the inlet, outlet, and casing joints of the screw conveyor. During conveying, coal particles are squeezed and rubbed, generating fine dust. Furthermore, the rotation of the helical blades drives airflow, forming a localized airflow that blows dust out from the gaps, creating dust pollution. The conveying component 10 enables the transfer of coal.

[0055] In some embodiments, the water spraying component 20 includes a first water spraying pipe 21, a second water spraying pipe 22, and a nozzle component 23. The first water spraying pipe 21 is disposed on the side of the transmission component 10 facing the transmission bearing surface 11. One end of the second water spraying pipe 22 is connected to the first water spraying pipe 21, and the other end of the second water spraying pipe 22 is connected to the water inlet channel. The nozzle component 23 is disposed on the first water spraying pipe 21 and is disposed facing the transmission bearing surface 11.

[0056] In some embodiments, the first water spray pipe 21 includes a plurality of parallel first water spray sub-channels for spraying different positions on the conveying bearing surface 11. In some embodiments, the switch component 50 is disposed on the second water spray pipe 22.

[0057] In some embodiments, the aforementioned first water spray pipe 21 may be disposed on the side of the transmission member 10 facing the transmission bearing surface 11. It is understood that when projected in a direction perpendicular to the transmission bearing surface 11, one end of the aforementioned first water spray pipe 21 may at least partially coincide with the projection of the transmission bearing surface 11. In some embodiments, the first water spray pipe 21 may have a nozzle component 23, which may be disposed facing the transmission bearing surface 11. It is understood that in this case, the extension line of the axis of the nozzle component 23 may intersect the transmission bearing surface 11.

[0058] In some embodiments, the aforementioned first water spray pipe 21 may be configured as a single pipe, and the first water spray pipe 21 may also include a plurality of first water spray sub-channels, which may be parallel to each other, and the nozzle components 23 on these first water spray sub-channels may be arranged toward the conveying bearing surface 11.

[0059] In some embodiments, the second water spray pipe 22 may be disposed at the same height as the first water spray pipe 21, or it may be disposed at a different height from the first water spray pipe 21. It is understood that when the second water spray pipe 22 is disposed at a different height from the first water spray pipe 21, one end of the second water spray pipe 22 may have a bend, which may be connected to the first water spray pipe 21. In some embodiments, the other end of the second water spray pipe 22 may be connected to a water inlet channel. Furthermore, a switch component 50 may be disposed at the other end of the second water spray pipe 22, which can control the on / off state of the second water spray pipe 22, thereby controlling the on / off state of the water spray component 20.

[0060] It is understandable that by setting up multiple first water spray sub-channels and nozzle components 23, the spraying range of the water spray component 20 can be increased.

[0061] In summary, the water spray component in this application reduces coal dust generated during coal flow. The detection component can detect the presence of coal on the transmission component, enabling intelligent switching of the water spray component without human intervention. Furthermore, by detachably configuring the flexible rod of the detection component, the flexible rod can be quickly and easily removed when dust suppression spraying is no longer needed on the coal on the transmission component, avoiding the need to suspend the entire transmission component and dismantle the entire water spray component.

[0062] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A water spraying apparatus for coal, the water spraying apparatus comprising a water inlet passage, characterized by, The sprinkler system also includes a transmission component (10), a spraying component (20), a detection component (30), a control component (40), and a switch component (50); wherein, The transmission component (10) has a transmission bearing surface (11) on which coal is placed for conveying the coal. The water spraying component (20) is at least partially disposed on the side of the transmission component (10) facing the transmission bearing surface (11) for spraying water onto the coal on the transmission bearing surface (11), and the other end of the water spraying component (20) is connected to the water inlet channel. The detection component (30) is disposed on the water spray component (20), and the detection end of the detection component (30) faces the conveying bearing surface (11) for detecting whether there is coal on the conveying bearing surface (11); One end of the control component (40) is electrically connected to the detection component (30), and the other end of the control component (40) is electrically connected to the switch component (50) for controlling the on / off state of the switch component (50); The switch component (50) is disposed on the water spray component (20) and is used to control the on / off state of the water spray component (20).

2. The watering device of claim 1, wherein, The transmission component (10) includes any one of belt conveyors, scraper conveyors and screw conveyors.

3. The watering device of claim 1, wherein, The water spray component (20) includes a first water spray pipe (21), a second water spray pipe (22), and a nozzle component (23), wherein, The first water spray pipe (21) is disposed on the side of the transmission component (10) facing the transmission bearing surface (11); One end of the second water spray pipe (22) is connected to the first water spray pipe (21), and the other end of the second water spray pipe (22) is connected to the water inlet channel; The nozzle component (23) is disposed on the first water spray pipe (21), and the nozzle component (23) is disposed facing the conveying bearing surface (11).

4. The watering device of claim 3, wherein The first water spray pipe (21) includes multiple parallel first water spray sub-channels for spraying different positions of the conveying bearing surface (11).

5. The watering device of claim 3, wherein, The switch component (50) is disposed on the second water spray pipe (22).

6. The watering device of claim 1, wherein, The detection component (30) includes a distance sensor for detecting coal on the conveying bearing surface (11).

7. The watering device of claim 1, wherein, The detection component (30) includes a vibration sensor (31) and a flexible rod (32). The vibration sensor (31) is mounted on the water spray component (20) and is electrically connected to the control component (40); One end of the flexible rod (32) is detachably mounted on the vibration sensor, and the other end of the flexible rod is positioned toward the transmission bearing surface (11).

8. The watering device of claim 1, wherein, The switching component (50) includes an electrically controlled valve device.

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