Dust suppression device for coal mining machines

Abstract

This invention provides a dust suppression device for a coal mining machine. The device includes: a baffle with perforations for the passage of a drum of the coal mining machine; the baffle extends vertically; an extension plate is provided at the top of the baffle, perpendicular to the baffle; and a spray assembly disposed on the baffle, comprising multiple spray pipes located on the side of the extension plate near the perforations, extending vertically and evenly distributed along the length and width of the extension plate. Each spray pipe is equipped with a nozzle, and the distance between the nozzle and the axis of the perforation gradually increases in the direction away from the extension plate. Applying the technical solution of this application can solve the problem of dust suppression effect in existing coal mining faces.

Description

Technical Field

[0001] This invention relates to the field of dust suppression technology in coal mining faces, and more specifically, to a dust suppression device for coal mining machines. Background Technology

[0002] In coal mining operations, the working face is generally mined by the cutting action of the coal face by the coal shearing machine drum. Due to the cutting and crushing action of the coal shearing machine drum, a large amount of dust and gravel are generated, especially around the drum. This dust not only seriously affects the health of miners, but may also reduce visibility in the mine and increase the risk of accidents.

[0003] Traditional dust control methods mainly rely on spraying facilities in the mine tunnels. However, since a large amount of dust is generated at the drum of the coal mining machine, spraying facilities can handle dust over a large area, but the dust concentrated around the drum has greater kinetic energy and will still be blown out of the spraying facilities and dispersed in the working face. Small gravel will also be blown out of the water mist, affecting the production environment. Summary of the Invention

[0004] This invention provides a dust suppression device for coal mining machines to solve the problem of dust suppression effect in existing coal mining faces.

[0005] This invention provides a dust suppression device for a coal mining machine. The dust suppression device includes: a baffle with perforations for the passage of a drum of the coal mining machine; the baffle extends vertically; an extension plate is provided at the top of the baffle, and the extension plate is perpendicular to the baffle; and a spray assembly disposed on the baffle, the spray assembly including multiple spray pipes located on the side of the extension plate near the perforations; the spray pipes extend vertically; the multiple spray pipes are evenly arranged along the length and width directions of the extension plate; each spray pipe is provided with a nozzle; and the distance between the nozzle and the axis of the perforation gradually increases along the direction away from the extension plate.

[0006] Furthermore, the spray pipe includes a rotating pipe and an extension pipe that are interconnected. The rotating pipe is vertically arranged, and the extension pipe is perpendicular to the rotating pipe. Multiple nozzles are provided on the extension pipe, and the multiple nozzles are spaced apart along the extension direction of the extension pipe.

[0007] Furthermore, the dust suppression device for the coal mining machine also includes a drive assembly, which is connected to the spray assembly to drive the nozzle to rotate in the horizontal direction.

[0008] Furthermore, the drive assembly includes: a drive motor; multiple first transmission gears, each corresponding to a plurality of rotating tubes, the first transmission gears being sleeved on the rotating tubes; multiple rotating tubes spaced apart along the width direction of the extension plate forming a first tube group; and multiple first tube groups spaced apart along the length direction of the extension plate; and multiple first transmission chains, each corresponding to a plurality of first tube groups, the first transmission chains meshing with the multiple first transmission gears of the first tube groups, and the first transmission chains being driven by the drive motor.

[0009] Furthermore, multiple rotating tubes spaced apart along the length of the extension plate form a second tube group, and the multiple second tube groups are spaced apart along the width of the extension plate. The drive assembly also includes: a second transmission gear, of which multiple second transmission gears are provided and are sleeved on the rotating tubes, with each of the multiple transmission gears corresponding to one of the multiple rotating tubes in one of the second tube groups; and a second transmission chain, in which multiple second transmission gears mesh, and the second transmission chain is driven and connected to the output end of the drive motor.

[0010] Furthermore, along the length of the extension plate, the extension tubes on two adjacent rotating tubes are spaced apart in the vertical direction.

[0011] Further, the baffle includes: a mounting plate having a perforation and a receiving cavity having a first opening and a second opening arranged opposite each other in a vertical direction, the first opening being located above the second opening; a first insert plate and a second insert plate, the first insert plate and the second insert plate being arranged opposite each other on both sides of the baffle in a vertical direction, the first insert plate being movably inserted into the receiving cavity through the first opening, the second insert plate being movably inserted into the receiving cavity through the second opening, and the side of the first insert plate away from the second insert plate being fixedly connected to an extension plate.

[0012] Furthermore, the receiving cavity is provided with sliding grooves on both sides that are arranged opposite each other in the horizontal direction, and the first insert plate and the second insert plate are provided with guide rods on both sides that are arranged opposite each other in the horizontal direction. The guide rods are movably arranged in the sliding grooves, and fasteners are provided between the guide rods and the baffles to limit the displacement of the first insert plate and the second insert plate.

[0013] Furthermore, the spray assembly also includes a water storage tank, multiple branch pipes and a manifold. The multiple branch pipes are fixedly mounted on the baffle plate and extend along the width direction of the extension plate. The multiple branch pipes are spaced apart along the length direction of the extension plate. Each branch pipe is equipped with multiple spray pipes, which are spaced apart along the extension direction of the branch pipe. All the branch pipes are connected to the manifold, which connects the branch pipes to the water storage tank. A water pump is installed between the water storage tank and the manifold.

[0014] Furthermore, the water tank also has a liquid level indicator component, which includes: an indicator light; a trigger switch, which is located inside the water tank and at the bottom of the water tank, and is electrically connected to the indicator light; and a float, which is located inside the water tank and is configured to correspond to the trigger switch. When the liquid level in the water tank drops to the position of the trigger switch, the float can trigger the trigger switch.

[0015] By applying the technical solution of this application, a baffle is installed on the rocker arm of the coal mining machine. The perforations in the baffle allow the drum of the coal mining machine to pass through, enabling the baffle to be fixed on the side of the drum away from the coal wall. The baffle and the extension plate at the top can prevent small stones from splashing, protecting the working environment of the working face. Furthermore, the spray assembly can spray targetedly around the drum, thereby dispersing coal ash and ensuring a clean working environment. Specifically, by setting the nozzles on multiple spray pipes in a stepped distribution, this application can perform multi-stage dust suppression on the dust generated around the drum. The closer the dust is to the drum axis, the greater its kinetic energy. After the dust passes through the first-stage nozzle, some dust with high kinetic energy will still be ejected as water mist. At this point, the radius of the dust ring formed by the dust will decrease. Then, targeted dust suppression is performed by the next stage nozzle, which is even closer to the drum axis, gradually reducing the kinetic energy of the dust and improving the dust suppression effect. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A side view of the dust suppression device for a coal mining machine provided by the present invention is shown;

[0018] Figure 2 A front view of the dust suppression device for coal mining machines provided by the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 100. Baffle; 01. Roller;

[0021] 101. Perforation; 102. Slide groove; 103. Guide rod;

[0022] 110. Mounting plate; 120. First insert plate; 130. Second insert plate; 140. Extension plate;

[0023] 210. Sprinkler pipe; 211. Rotating pipe; 212. Extension pipe;

[0024] 310. Drive motor; 320. First transmission chain; 330. Second transmission chain;

[0025] 410. Water storage tank; 420. Diverter pipe; 430. Manifold pipe; 440. Indicator light; 450. Trigger switch; 460. Float; 470. Mounting bracket; 480. Float rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a dust suppression device for a coal mining machine, comprising a baffle 100 and a spray assembly. The baffle 100 has a through-hole 101 for the passage of the drum 01 of the coal mining machine. The baffle 100 extends vertically, and an extension plate 140 is provided at the top of the baffle 100, perpendicular to the baffle 100. The spray assembly is mounted on the baffle 100 and includes multiple spray pipes 210 located on the side of the extension plate 140 near the through-hole 101. The spray pipes 210 extend vertically and are evenly arranged along the length and width of the extension plate 140. Each spray pipe 210 has a nozzle, and the distance between the nozzle and the axis of the through-hole 101 gradually increases in the direction away from the extension plate 140.

[0028] Applying the technical solution of this application, a baffle 100 is installed on the rocker arm of the coal mining machine. The perforation 101 of the baffle 100 allows the drum 01 of the coal mining machine to pass through, enabling the baffle 100 to be fixed on the side of the drum 01 away from the coal wall. The baffle 100 and the top extension plate 140 can prevent the splashing of small stones, protecting the working environment of the working face. Furthermore, the spray assembly can spray the area around the drum 01 in a targeted manner, thereby dispersing coal ash and ensuring a clean working environment. Specifically, in this application, by setting the nozzles on multiple spray pipes 210 in a stepped distribution, multi-stage dust suppression can be performed on the dust generated around the drum 01. The closer the dust is to the axis of the drum 01, the greater its kinetic energy. After the dust passes through the first-stage nozzle, some dust with high kinetic energy will still be ejected as water mist. At this time, the radius of the dust ring formed by the dust will decrease. Then, targeted dust suppression is performed by the next stage nozzle, which is closer to the axis of the drum 01, gradually reducing the kinetic energy of the dust and improving the dust suppression effect.

[0029] Specific reference Figure 1 and Figure 2 As shown, the z-direction is the vertical direction, the x-direction is the length direction of the extension plate 140, the y-direction is the width direction of the extension plate 140, and the x-direction and y-direction are located in the horizontal direction.

[0030] Specifically, the spray pipe 210 includes a rotating pipe 211 and an extension pipe 212 that are interconnected. The rotating pipe 211 is vertically arranged, and the extension pipe 212 is perpendicular to the rotating pipe 211. Multiple nozzles are installed on the extension pipe 212, and these nozzles are spaced apart along the extension direction of the extension pipe 212. This arrangement allows for the installation of multiple nozzles in the horizontal direction, thereby expanding the range of water mist sprayed by the nozzles and improving the effectiveness of the dust suppression device on the coal mining machine.

[0031] Furthermore, the dust suppression device for the coal mining machine also includes a drive assembly, which is connected to the spray assembly to drive the nozzle to rotate in the horizontal direction. When the drum 01 of the coal mining machine is mining coal, a portion of the drum 01 usually acts on the coal wall. In this application, by setting the nozzle to rotate in the horizontal direction, the nozzle can be more accurately aligned with the mating point between the drum 01 and the coal wall, ensuring that the water mist can cover the dust to the maximum extent.

[0032] In one specific embodiment of this application, the driving assembly includes a drive motor 310, first transmission gears, and first transmission chains 320. Multiple first transmission gears are provided, each corresponding to a plurality of rotating tubes 211. The first transmission gears are sleeved on the rotating tubes 211. Multiple rotating tubes 211, spaced apart along the width direction of the extension plate 140, form first tube groups. Multiple first tube groups are spaced apart along the length direction of the extension plate 140. Multiple first transmission chains 320 are provided, each corresponding to a plurality of first tube groups. The first transmission chains 320 mesh with the multiple first transmission gears of the first tube groups, specifically as follows: Figure 2 As shown, in this example, the first tube group has 5 tubes. In other embodiments, the first tube group can also have 6 or 7 tubes, etc. The first transmission chain 320 is driven and connected to the drive motor 310. With the above configuration, the drive motor 310 can cooperate with the first transmission chain 320 to drive multiple rotating tubes 211 of the same first tube group to rotate, thereby driving the nozzles on multiple extension tubes 212 to adjust the spray angle.

[0033] Optionally, multiple drive motors 310 are provided, and each drive motor 310 corresponds to one of the multiple first pipe groups. With this configuration, the spray angle of the nozzles in different first pipe groups can be adjusted by multiple drive motors 310, making the adjustment of the spray range more flexible and improving the effectiveness of the dust suppression device of the coal mining machine.

[0034] Specifically, a plurality of rotating tubes 211 spaced apart along the length of the extension plate 140 form a second tube group, and the plurality of second tube groups are spaced apart along the width of the extension plate 140. The drive assembly also includes a second transmission gear and a second transmission chain 330. Multiple second transmission gears are provided, such as... Figure 1 As shown, in this example, the second tube group has three units. In other embodiments, the second tube group can also have four or five units, etc. A second transmission gear is sleeved on the rotating tube 211. Multiple transmission gears are correspondingly arranged one-to-one with multiple rotating tubes 211 in one of the second tube groups. Multiple second transmission gears mesh with the second transmission chain 330, which is driven by the output end of the drive motor 310. Through this arrangement, the drive motor 310 can cooperate with the second transmission chain 330, which can drive multiple rotating tubes 211 in the second tube group to rotate synchronously. At this time, the multiple rotating tubes 211 can also drive multiple first tube groups to rotate synchronously through the first transmission chain 320. Thus, only one drive motor 310 is needed to drive all rotating tubes 211 to rotate synchronously, facilitating simultaneous adjustment of the spray angle of all nozzles.

[0035] In this application, along the length of the extension plate 140, the extension tubes 212 on adjacent rotating tubes 211 are spaced apart in the vertical direction. This arrangement ensures that when multiple rotating tubes 211 rotate, the extension tubes 212 on adjacent rotating tubes will not interfere with each other, guaranteeing the normal rotation of the rotating tubes 211. Furthermore, it also increases the spray range of the water mist.

[0036] Specifically, the baffle 100 includes a mounting plate 110, a first insert plate 120, and a second insert plate 130. The mounting plate 110 has a through hole 101 and a receiving cavity with a first opening and a second opening vertically opposite each other, the first opening being above the second opening. The first insert plate 120 and the second insert plate 130 are positioned opposite each other on both sides of the baffle 100 vertically. The first insert plate 120 is movably inserted into the receiving cavity through the first opening, and the second insert plate 130 is movably inserted into the receiving cavity through the second opening. The side of the first insert plate 120 away from the second insert plate 130 is fixedly connected to an extension plate 140. Through this arrangement, the positions of the first insert plate 120 and the second insert plate 130 relative to the mounting plate 110 can be adjusted to change the covering area of ​​the baffle 100, allowing the baffle 100 to adapt to different coal mining faces.

[0037] Furthermore, the receiving cavity is provided with sliding grooves 102 on both sides arranged opposite each other in the horizontal direction, and the first insert plate 120 and the second insert plate 130 are provided with guide rods 103 on both sides arranged opposite each other in the horizontal direction. The guide rods 103 are movably disposed in the sliding grooves 102, and fasteners are provided between the guide rods 103 and the baffle 100 to limit the displacement of the first insert plate 120 and the second insert plate 130. With this configuration, when the first insert plate 120 and the second insert plate 130 move, the guide rods 103 cooperate with the sliding grooves 102 to guide the movement of the first insert plate 120 and the second insert plate 130, ensuring that the first insert plate 120 and the second insert plate 130 move smoothly; when the first insert plate 120 and the second insert plate 130 are adjusted to a suitable position, the first insert plate 120 and the second insert plate 130 can be fixed by the fasteners and the guide rods 103 to ensure that the first insert plate 120 and the second insert plate 130 will not slip when the baffle 100 is in use.

[0038] Specifically, the guide rod 103 is a screw, and the fastener is a nut. The nut cooperates with the guide rod 103. When it is necessary to move the first insert plate 120 and the second insert plate 130, the nuts on both sides can be rotated away from the baffle 100 to allow the first insert plate 120 and the second insert plate 130 to move. When the position is determined and it is necessary to fix the first insert plate 120 and the second insert plate 130, the nuts on both sides can be rotated towards the baffle 100 to fix the first insert plate 120 and the second insert plate 130.

[0039] Specifically, the spray assembly also includes a water storage tank 410, multiple branch pipes 420, and a manifold 430. The multiple branch pipes 420 are fixedly mounted on the baffle 100, extending along the width of the extension plate 140. The multiple branch pipes 420 are spaced apart along the length of the extension plate 140. Each branch pipe 420 is equipped with multiple spray pipes 210, which are spaced apart along the extension direction of the branch pipe 420. Each branch pipe 420 is connected to the manifold 430, which connects the branch pipes 420 to the water storage tank 410. A water pump is installed between the water storage tank 410 and the manifold 430. Through this arrangement, the water pump can divert water from the water storage tank 410 to the manifold 430, and then distribute it to the multiple branch pipes 420, where it is sprayed out through the nozzles of the spray pipes 210.

[0040] Furthermore, the spray pipe 210 is rotatably connected to the diverter pipe 420 to adjust the spray angle of the nozzle. The spray pipe 210 can be connected to the diverter pipe 420 by a thread or by a limiting boss, and a sealing ring is provided at the connection between the spray pipe 210 and the diverter pipe 420.

[0041] In this application, the water storage tank 410 also has a liquid level indicator component, which includes an indicator light 440, a trigger switch 450, and a float 460. The trigger switch 450 is located inside the water storage tank 410 at its bottom and is electrically connected to the indicator light 440. The float 460 is located inside the water storage tank 410 and is positioned corresponding to the trigger switch 450. The trigger switch 450 is an actuated switch; when the liquid level in the water storage tank 410 drops to the position of the trigger switch 450, the float 460 triggers the trigger switch 450. With this configuration, when the liquid level in the water storage tank 410 drops below the trigger switch 450, the float 460 falls onto the trigger switch 450, which then illuminates the indicator light 440, reminding staff to add water.

[0042] Specifically, the water storage tank 410 is also equipped with a mounting bracket 470 and a float 480. The float 480 is fixedly connected to the float ball 460, and the mounting bracket 470 and the float 480 are guided to ensure that the float ball 460 is aligned with the trigger switch 450 during movement, thus ensuring the stability of the liquid level indicator component.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dust suppression device for a coal mining machine, characterized in that, The dust suppression device for the coal mining machine includes: A baffle (100) has a perforation (101) for passing through the drum (01) of a coal mining machine. The baffle (100) extends vertically and an extension plate (140) is provided at the top of the baffle (100). The extension plate (140) is perpendicular to the baffle (100). A spray assembly is disposed on the baffle (100). The spray assembly includes a plurality of spray pipes (210). The spray pipes (210) are located on the side of the extension plate (140) near the perforation (101). The spray pipes (210) extend in a vertical direction. The plurality of spray pipes (210) are evenly arranged along the length and width directions of the extension plate (140). The spray pipes (210) are provided with nozzles. Along the direction away from the baffle (100), the distance between the nozzles and the axis of the perforation (101) gradually increases. The spray pipe (210) includes a rotating pipe (211) and an extension pipe (212) that are connected to each other. The rotating pipe (211) is vertically arranged, and the extension pipe (212) is perpendicular to the rotating pipe (211). The extension pipe (212) is provided with a plurality of spray nozzles, which are spaced apart along the extension direction of the extension pipe (212). The dust suppression device for the coal mining machine also includes a drive assembly, which is connected to the spray assembly to drive the nozzle to rotate in the horizontal direction; The driving component includes: Drive motor (310); The first transmission gear is provided in multiple ways. Each of the multiple first transmission gears is provided in a one-to-one correspondence with a multiple of the rotating tubes (211). The first transmission gear is sleeved on the rotating tube (211). The multiple rotating tubes (211) distributed at intervals along the width direction of the extension plate (140) form a first tube group. The multiple first tube groups are arranged at intervals along the length direction of the extension plate (140). The first transmission chain (320) is provided in multiple ways. Each of the multiple first transmission chains (320) is provided in a one-to-one correspondence with a multiple first tube group. The first transmission chain (320) meshes with a multiple first transmission gear of the first tube group. The first transmission chain (320) is driven and connected to the drive motor (310). A plurality of rotating tubes (211) spaced apart along the length direction of the extension plate (140) form a second tube group, and the plurality of second tube groups are spaced apart along the width direction of the extension plate (140). The drive assembly further includes: The second transmission gear, there are multiple second transmission gears, the second transmission gears are sleeved on the rotating tube (211), and the multiple transmission gears are arranged one-to-one with the multiple rotating tubes (211) of one of the second tube groups; The second transmission chain (330) has multiple second transmission gears meshing with it, and the second transmission chain (330) is driven connected to the output end of the drive motor (310).

2. The dust suppression device for coal mining machines according to claim 1, characterized in that, Along the length direction of the extension plate (140), the extension tubes (212) on two adjacent rotating tubes (211) are spaced apart in the vertical direction.

3. The dust suppression device for coal mining machines according to claim 1, characterized in that, The baffle (100) includes: Mounting plate (110), the mounting plate (110) having the through hole (101), the mounting plate (110) having a receiving cavity, the receiving cavity having a first opening and a second opening arranged opposite to each other in the vertical direction, the first opening being located above the second opening; A first insert plate (120) and a second insert plate (130) are disposed opposite each other on both sides of the baffle (100) in the vertical direction. The first insert plate (120) is movably inserted into the receiving cavity through the first opening, and the second insert plate (130) is movably inserted into the receiving cavity through the second opening. The side of the first insert plate (120) away from the second insert plate (130) is fixedly connected to the extension plate (140).

4. The dust suppression device for a coal mining machine according to claim 3, characterized in that, The receiving cavity is provided with sliding grooves (102) on both sides opposite to each other in the horizontal direction. The first insert plate (120) and the second insert plate (130) are provided with guide rods (103) on both sides opposite to each other in the horizontal direction. The guide rods (103) are movably disposed in the sliding grooves (102). Fasteners are provided between the guide rods (103) and the baffle (100) to limit the displacement of the first insert plate (120) and the second insert plate (130).

5. The dust suppression device for a coal mining machine according to claim 1, characterized in that, The spray assembly also includes a water tank (410), multiple branch pipes (420) and a manifold (430). The multiple branch pipes (420) are fixedly mounted on the baffle (100). The branch pipes (420) extend along the width direction of the extension plate (140). The multiple branch pipes (420) are spaced apart along the length direction of the extension plate (140). Each branch pipe (420) is provided with multiple spray pipes (210). The multiple spray pipes (210) are spaced apart along the extension direction of the branch pipe (420). The multiple branch pipes (420) are all connected to the manifold (430). The manifold (430) connects the branch pipes (420) and the water tank (410). A water pump is provided between the water tank (410) and the manifold (430).

6. The dust suppression device for a coal mining machine according to claim 5, characterized in that, The water storage tank (410) also has a liquid level indicator component, the indicator component comprising: Indicator light (440); A trigger switch (450) is disposed inside the water storage tank (410) and located at the bottom of the water storage tank (410). The trigger switch (450) is electrically connected to the indicator light (440). A float (460) is installed in the water storage tank (410) and is configured to correspond to the trigger switch (450). When the liquid level in the water storage tank (410) drops to the position of the trigger switch (450), the float (460) can trigger the trigger switch (450).

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