Dust fall device of coal mining machine

Abstract

The invention provides a coal mining machine dust falling device which comprises a baffle, a dust falling device body and a dust falling device body, the baffle is provided with a through hole, the through hole is used for allowing a roller of a coal mining machine to penetrate through, the baffle extends in the vertical direction, and an extension plate is arranged at the top end of the baffle and is perpendicular to the baffle; the spraying assembly is arranged on the baffle and comprises a plurality of spraying pipes, the spraying pipes are located on the side, close to the penetrating hole, of the extending plate and extend in the vertical direction, the spraying pipes are evenly distributed in the length direction and the width direction of the extending plate, spraying heads are arranged on the spraying pipes, and the spraying heads are arranged in the direction away from the extending plate. And the distance from the nozzle to the perforation axis is gradually increased. By means of the technical scheme, the problem of the dust falling effect of the coal face in the prior art can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of dust reduction on coal mining working faces, and in particular to a dust reduction device for a coal mining machine. Background Art

[0002] In coal mining operations, the coal mining machine drum generally cuts the coal wall to mine the working face. Due to the cutting and crushing action of the coal mining machine drum, a large amount of dust and gravel will be generated, especially around the drum. This dust not only has a serious impact on the health of the miners, but may also cause reduced visibility in the mine and increase the risk of accidents.

[0003] The traditional dust control method mainly achieves dust reduction by arranging spray facilities in the mine tunnel. However, since a large amount of dust will be generated at the drum of the coal mining machine, only spray facilities can handle dust in a large range. However, the dust concentrated around the drum has a large kinetic energy and will still rush out of the water mist sprayed by the spray setting and diffuse in the working face. Small gravel will also rush out of the water mist, affecting the production environment. Summary of the invention

[0004] The invention provides a dust reduction device for a coal mining machine to solve the problem of dust reduction effect on a coal mining working face in the prior art.

[0005] The present invention provides a dust reduction device for a coal mining machine, which includes: a baffle plate with a through hole, the through hole is used to penetrate the drum of the coal mining machine, the baffle plate extends in a vertical direction, an extension plate is provided at the top of the baffle plate, the extension plate and the baffle plate are perpendicular to each other; a spray assembly is arranged on the baffle plate, the spray assembly includes a plurality of spray pipes, the spray pipes are located on a side of the extension plate close to the through hole, the spray pipes extend in a vertical direction, the plurality of spray pipes are evenly arranged along the length direction and the width direction of the extension plate, a spray head is provided on the spray pipe, and the distance from the spray head to the axis of the through hole gradually increases in a direction away from the extension plate.

[0006] Furthermore, the spray pipe includes a rotating pipe and an extension pipe which are interconnected. The rotating pipe is vertically arranged, and the extension pipe and the rotating pipe are perpendicular to each other. A plurality of nozzles are arranged on the extension pipe, and the plurality of nozzles are arranged at intervals along the extension direction of the extension pipe.

[0007] Furthermore, the coal mining machine dust reduction device also includes a driving assembly, which is drivingly connected to the spray assembly to drive the spray head to rotate in the horizontal direction.

[0008] Further, the driving component includes: a driving motor; a first transmission gear, a plurality of first transmission gears are provided, and the plurality of first transmission gears are arranged in one-to-one correspondence with the plurality of rotating tubes, the first transmission gear is sleeved on the rotating tube, and the plurality of rotating tubes spaced apart along the width direction of the extension plate form a first tube group, and the plurality of first tube groups are spaced apart along the length direction of the extension plate; a first transmission chain, a plurality of first transmission chains are provided, and the plurality of first transmission chains are arranged in one-to-one correspondence with the plurality of first tube groups, the first transmission chain is meshed with the plurality of first transmission gears of the first tube group, and the first transmission chain is drivingly connected to the driving motor.

[0009] Furthermore, a plurality of rotating tubes spaced apart along the length direction of the extension plate form a second tube group, and the plurality of second tube groups are spaced apart along the width direction of the extension plate. The driving assembly also includes: a second transmission gear, a plurality of second transmission gears are provided, the second transmission gears are sleeved on the rotating tube, and the plurality of transmission gears are arranged one-to-one correspondingly to the plurality of rotating tubes of one of the second tube groups; a second transmission chain, the plurality of second transmission gears of the second transmission chain are meshed, and the second transmission chain is drivingly connected to the output end of the driving motor.

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

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

[0012] Furthermore, slide grooves are provided on two sides of the accommodating cavity that are opposite to each other in the horizontal direction, guide rods are provided on two sides of the first plug plate and the second plug plate that are opposite to each other in the horizontal direction, the guide rods are movably provided in the slide grooves, and fasteners are provided between the guide rods and the baffle to limit the displacement of the first plug plate and the second plug plate.

[0013] Furthermore, the spray assembly also includes a water tank, multiple diversion pipes and a confluence pipe. The multiple diversion pipes are fixedly arranged on the baffle plate. The diversion pipes extend along the width direction of the extension plate. The multiple diversion pipes are spaced apart along the length direction of the extension plate. Each diversion pipe is provided with multiple spray pipes. The multiple spray pipes are spaced apart along the extension direction of the diversion pipes. The multiple diversion pipes are all connected to the confluence pipe. The confluence pipe connects the diversion pipes and the water tank. A water pump is provided between the water tank and the confluence pipe.

[0014] Furthermore, the water tank also has a liquid level prompt component, which includes: a prompt light; a trigger switch, which is arranged in the water tank and located at the bottom of the water tank, and the trigger switch is electrically connected to the prompt light; a float, which is arranged in the water tank and corresponds 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 the present application, a baffle is arranged on the rocker arm of the coal mining machine, and the perforations of the baffle can allow the drum of the coal mining machine to pass through, so that the baffle can be fixed on the side of the drum away from the coal wall, so that the baffle and the extension plate at the top can stop the splashing of small stones, protect the working environment of the working face, and the spray assembly can carry out targeted spraying around the drum, so as to achieve the dispersion of coal ash and ensure the cleanliness of the working environment. Specifically, in the present application, by setting the nozzles on multiple spray pipes in a stepped distribution form, multi-stage dust reduction can be carried out for the dust generated on the periphery of the drum. The closer the dust is to the axis of the drum, the greater the kinetic energy of the dust is. After the dust passes through the dust reduction of the first-stage nozzle, some dust with large kinetic energy will still rush out of the water mist. At this time, the radius of the dust ring formed by the dust will be reduced, and targeted dust reduction is carried out by the nozzle of the next stage closer to the axis of the drum, so as to reduce the kinetic energy of the dust step by step and improve the dust reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present 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 reduction device for a coal mining machine provided by the present invention is shown.

[0019] The above drawings 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 plug plate; 130, second plug plate; 140, extension plate;

[0023] 210, spray pipe; 211, rotating pipe; 212, extension pipe;

[0024] 310, driving motor; 320, first transmission chain; 330, second transmission chain;

[0025] 410, water storage tank; 420, shunt pipe; 430, confluence pipe; 440, warning light; 450, trigger switch; 460, float ball; 470, mounting bracket; 480, float rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a coal mining machine dust reduction device, which includes a baffle 100 and a spray assembly. The baffle 100 has a through hole 101, and the through hole 101 is used to penetrate the drum 01 of the coal mining machine. The baffle 100 extends in the vertical direction, and an extension plate 140 is provided at the top of the baffle 100, and the extension plate 140 and the baffle 100 are perpendicular to each other. The spray assembly is arranged on the baffle 100, and the spray assembly includes a plurality of spray pipes 210, and the spray pipes 210 are located on a side of the extension plate 140 close to the through hole 101, and the spray pipes 210 extend in the vertical direction. The plurality of spray pipes 210 are evenly arranged along the length direction and the width direction of the extension plate 140, and a nozzle is provided on the spray pipe 210, and the distance from the nozzle to the axis of the through hole 101 gradually increases in the direction away from the extension plate 140.

[0028] By applying the technical solution of the present application, the baffle 100 is arranged on the rocker arm of the coal mining machine, and the through hole 101 of the baffle 100 can be passed through by the drum 01 of the coal mining machine, so that the baffle 100 can be fixed on the side of the drum 01 away from the coal wall, so that the baffle 100 and the extension plate 140 at the top can stop the splashing of small stones, protect the working environment of the working face, and the spray assembly can carry out targeted spraying around the drum 01, so as to achieve the dispersion of coal ash and ensure the cleanliness of the working environment. Specifically, in the present application, by setting the nozzles on the multiple spray pipes 210 in the form of a stepped distribution, the dust generated on the periphery of the drum 01 can be subjected to multi-stage dust reduction. The closer the dust is to the axis of the drum 01, the greater the kinetic energy of the dust is. After the dust passes through the dust reduction of the first-level nozzle, some dust with large kinetic energy will still rush out of the water mist. At this time, the radius of the dust ring formed by the dust will be reduced, and the nozzles of the next level closer to the axis of the drum 01 are used for targeted dust reduction, and the kinetic energy of the dust is gradually reduced to improve the dust reduction 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 the y direction are 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, the extension pipe 212 is perpendicular to the rotating pipe 211, and a plurality of nozzles are arranged on the extension pipe 212, and the plurality of nozzles are arranged at intervals along the extension direction of the extension pipe 212. Through the above arrangement, a plurality of nozzles can be arranged in the horizontal direction to expand the range of the nozzle spraying water mist in the horizontal direction, thereby improving the use effect of the dust suppression device for the coal mining machine.

[0031] Furthermore, the coal mining machine dust suppression device also includes a driving 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, a part 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 matching point of the drum 01 and the coal wall, ensuring that the water mist can cover the dust to the maximum extent.

[0032] In a specific embodiment of the present application, the driving assembly includes a driving motor 310, a first transmission gear and a first transmission chain 320. There are multiple first transmission gears, and the multiple first transmission gears are arranged one-to-one with the multiple rotating tubes 211. The first transmission gear is sleeved on the rotating tube 211. The multiple rotating tubes 211 spaced apart along the width direction of the extension plate 140 form a first tube group, and the multiple first tube groups are spaced apart along the length direction of the extension plate 140. There are multiple first transmission chains 320, and the multiple first transmission chains 320 are arranged one-to-one with the multiple first tube groups. The first transmission chain 320 meshes with the multiple first transmission gears of the first tube group, as shown in FIG. Figure 2 As shown, in this example, five first tube groups are provided. In other embodiments, six or seven first tube groups may also be provided. The first transmission chain 320 is drivingly connected to the drive motor 310. Through the above arrangement, 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 the multiple extension tubes 212 to adjust the spray angle.

[0033] Optionally, a plurality of drive motors 310 are provided, and the plurality of drive motors 310 are provided in one-to-one correspondence with the plurality of first pipe groups. With such a configuration, the spray angles of the nozzles in different first pipe groups can be adjusted by the plurality of drive motors 310, making the adjustment of the spray range more flexible and improving the use effect of the dust reduction device of the coal mining machine.

[0034] Specifically, a plurality of rotating tubes 211 spaced apart along the length direction of the extension plate 140 form a second tube group, and a plurality of second tube groups are spaced apart along the width direction of the extension plate 140. The driving assembly further includes a second transmission gear and a second transmission chain 330. The second transmission gear is provided with a plurality of Figure 1 As shown, in this example, three second tube groups are provided, and in other embodiments, four or five second tube groups may also be provided. The second transmission gear is sleeved on the rotating tube 211, and the plurality of transmission gears are provided one-to-one with the plurality of rotating tubes 211 of one of the second tube groups. The plurality of second transmission gears of the second transmission chain 330 are meshed, and the second transmission chain 330 is drivingly connected with the output end of the driving motor 310. Through the above arrangement, the driving motor 310 can cooperate with the second transmission chain 330, and the plurality of rotating tubes 211 in the second tube group can be driven to rotate synchronously through the second transmission chain 330. At this time, the plurality of rotating tubes 211 can also drive the plurality of first tube groups to rotate synchronously through the first transmission chain 320. In this way, only one driving motor 310 is provided to realize the synchronous rotation of all rotating tubes 211, so that the spray angles of all nozzles can be adjusted simultaneously.

[0035] In the present application, the extension tubes 212 on two adjacent rotating tubes 211 are arranged at intervals in the vertical direction along the length direction of the extension plate 140. Through the above arrangement, when the plurality of rotating tubes 211 rotate, the extension tubes 212 on two adjacent rotating tubes will not interfere with each other, thus ensuring the normal rotation of the rotating tubes 211. In addition, the spraying range of the water mist can also be increased.

[0036] Specifically, the baffle 100 includes a mounting plate 110, a first plug plate 120 and a second plug plate 130. The mounting plate 110 has a through hole 101, and the mounting plate 110 has a receiving cavity, and the receiving cavity has a first opening and a second opening arranged oppositely in a vertical direction, and the first opening is located above the second opening. The first plug plate 120 and the second plug plate 130 are arranged oppositely on two sides of the baffle 100 arranged oppositely in a vertical direction, the first plug plate 120 is movably inserted in the receiving cavity through the first opening, and the second plug plate 130 is movably inserted in the receiving cavity through the second opening, and the side of the first plug plate 120 away from the second plug plate 130 is fixedly connected to the extension plate 140. Through the above arrangement, the positions of the first plug plate 120 and the second plug plate 130 relative to the mounting plate 110 can be adjusted to adjust the shielding area of ​​the baffle 100, so that the baffle 100 can adapt to different coal mining working faces.

[0037] Furthermore, the accommodating cavity is provided with slide grooves 102 on two sides thereof which are arranged opposite to each other in the horizontal direction, and the first plug plate 120 and the second plug plate 130 are provided with guide rods 103 on two sides thereof which are arranged opposite to each other in the horizontal direction, and the guide rods 103 are movably arranged in the slide grooves 102, and fasteners are arranged between the guide rods 103 and the baffle 100 to limit the displacement of the first plug plate 120 and the second plug plate 130. With such arrangement, when the first plug plate 120 and the second plug plate 130 move, the guide rods 103 cooperate with the slide grooves 102 to guide the movement of the first plug plate 120 and the second plug plate 130, so as to ensure the smooth movement of the first plug plate 120 and the second plug plate 130; when the first plug plate 120 and the second plug plate 130 are adjusted to a suitable position, the first plug plate 120 and the second plug plate 130 can be fixed by fasteners in cooperation with the guide rods 103, so as to ensure that the first plug plate 120 and the second plug plate 130 will not slip when the baffle 100 is used.

[0038] Specifically, the guide rod 103 is a screw rod, and the fastener is a nut. The nut cooperates with the guide rod 103. When the first plug plate 120 and the second plug plate 130 need to be moved, the nuts on both sides can be rotated in the direction away from the baffle 100 to allow the first plug plate 120 and the second plug plate 130 to be moved; when the position is determined and the first plug plate 120 and the second plug plate 130 need to be fixed, the nuts on both sides can be rotated in the direction close to the baffle 100 to allow the first plug plate 120 and the second plug plate 130 to be fixed.

[0039] Specifically, the spray assembly further includes a water storage tank 410, a plurality of shunt pipes 420 and a manifold 430. The plurality of shunt pipes 420 are fixedly arranged on the baffle 100. The shunt pipes 420 extend along the width direction of the extension plate 140. The plurality of shunt pipes 420 are arranged at intervals along the length direction of the extension plate 140. A plurality of spray pipes 210 are arranged on each shunt pipe 420. The plurality of spray pipes 210 are arranged at intervals along the extension direction of the shunt pipes 420. The plurality of shunt pipes 420 are all connected to the manifold 430. The manifold 430 connects the shunt pipes 420 and the water storage tank 410. A water pump is arranged between the water storage tank 410 and the manifold 430. Through the above arrangement, the water pump can pump the water in the water storage tank 410 to the manifold 430, and then divide the water into the plurality of shunt pipes 420, and then spray it out through the nozzle of the spray pipe 210.

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

[0041] In the present application, the water tank 410 also has a liquid level prompt component, which includes a prompt light 440, a trigger switch 450 and a float 460. The trigger switch 450 is arranged in the water tank 410 and is located at the bottom of the water tank 410. The trigger switch 450 is electrically connected to the prompt light 440. The float 460 is arranged in the water tank 410 and is arranged corresponding to the trigger switch 450. The trigger switch 450 is a touch switch. When the liquid level in the water tank 410 drops to the position of the trigger switch 450, the float 460 can trigger the trigger switch 450. Through the above arrangement, when the liquid level in the water tank 410 drops to the position below the trigger switch 450, the float 460 will fall onto the trigger switch 450, and then the prompt light 440 will light up through the trigger switch 450, reminding the staff to replenish water.

[0042] Specifically, a mounting frame 470 and a float rod 480 are also provided in the water tank 410. The float rod 480 is fixedly connected to the float ball 460. The mounting frame 470 and the float rod 480 are guided to cooperate to ensure that the float ball 460 can face the trigger switch 450 during movement, thereby ensuring the stability of the operation of the liquid level prompt component.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust suppression device for a coal mining machine, characterized in that: The coal mining machine dust suppression device comprises: The baffle (100) has a through hole (101), wherein the through hole (101) is used to penetrate a drum (01) of a coal mining machine, the baffle (100) extends in a vertical direction, an extension plate (140) is provided at the top end of the baffle (100), and the extension plate (140) and the baffle (100) are perpendicular to each other; A spray assembly is arranged on the baffle (100), the spray assembly comprises a plurality of spray pipes (210), the spray pipes (210) are located on a side of the extension plate (140) close to the through hole (101), the spray pipes (210) extend in a vertical direction, the plurality of spray pipes (210) are evenly arranged along the length direction and the width direction of the extension plate (140), a spray head is arranged on the spray pipe (210), and the distance between the spray head and the axis of the through hole (101) gradually increases in a direction away from the extension plate (140).

2. The dust suppression device for coal mining machine according to claim 1, characterized in that: The spray pipe (210) comprises a rotating pipe (211) and an extension pipe (212) which are connected to each other, the rotating pipe (211) is vertically arranged, the extension pipe (212) and the rotating pipe (211) are perpendicular to each other, and a plurality of the spray heads are arranged on the extension pipe (212), and the plurality of the spray heads are arranged at intervals along the extension direction of the extension pipe (212).

3. The dust suppression device for coal mining machine according to claim 2, characterized in that: The coal mining machine dust reduction device also includes a driving component, which is drivingly connected to the spray component to drive the spray head to rotate in the horizontal direction.

4. The dust suppression device for coal mining machine according to claim 3, characterized in that: The drive assembly comprises: A driving motor (310); a first transmission gear, wherein a plurality of the first transmission gears are provided, and the plurality of the first transmission gears are arranged in one-to-one correspondence with the plurality of the rotating tubes (211), and the first transmission gear is sleeved on the rotating tubes (211), and the plurality of the rotating tubes (211) distributed at intervals along the width direction of the extension plate (140) form a first tube group, and the plurality of the first tube groups are arranged at intervals along the length direction of the extension plate (140); A first transmission chain (320), wherein a plurality of the first transmission chains (320) are provided, and the plurality of the first transmission chains (320) are provided in a one-to-one correspondence with the plurality of the first tube groups, the first transmission chain (320) is meshed with the plurality of the first transmission gears of the first tube group, and the first transmission chain (320) is drivingly connected to the driving motor (310).

5. The dust suppression device for coal mining machine according to claim 4, characterized in that: A plurality of the rotating tubes (211) spaced apart along the length direction of the extension plate (140) form a second tube group, and a plurality of the second tube groups are spaced apart along the width direction of the extension plate (140). The driving assembly further comprises: a second transmission gear, wherein a plurality of the second transmission gears are provided, the second transmission gears are sleeved on the rotating tube (211), and the plurality of the transmission gears are provided in a one-to-one correspondence with the plurality of the rotating tubes (211) of one of the second tube groups; A second transmission chain (330), wherein a plurality of the second transmission gears of the second transmission chain (330) are meshed, and the second transmission chain (330) is drivingly connected to an output end of the driving motor (310).

6. The dust suppression device for coal mining machine according to claim 3, characterized in that: Along the length direction of the extension plate (140), the extension tubes (212) on two adjacent rotating tubes (211) are arranged at intervals in the vertical direction.

7. The dust suppression device for coal mining machine according to claim 1, characterized in that: The baffle (100) comprises: A 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 a vertical direction, the first opening being located above the second opening; A first plug plate (120) and a second plug plate (130), wherein the first plug plate (120) and the second plug plate (130) are arranged oppositely on two sides of the baffle (100) that are arranged oppositely in the vertical direction, the first plug plate (120) is movably inserted into the accommodating cavity through the first opening, and the second plug plate (130) is movably inserted into the accommodating cavity through the second opening, and a side edge of the first plug plate (120) away from the second plug plate (130) is fixedly connected to the extension plate (140).

8. The dust suppression device for coal mining machine according to claim 7, characterized in that: The accommodating cavity is provided with sliding grooves (102) on two sides thereof which are arranged opposite to each other in the horizontal direction, and the first plug plate (120) and the second plug plate (130) are provided with guide rods (103) on two sides thereof which are arranged opposite to each other in the horizontal direction. The guide rod (103) is movably arranged in the sliding grooves (102), and a fastener is provided between the guide rod (103) and the baffle (100) to limit the displacement of the first plug plate (120) and the second plug plate (130).

9. The dust suppression device for coal mining machine according to claim 1, characterized in that: The spray assembly further comprises a water storage tank (410), a plurality of diverter pipes (420) and a confluence pipe (430); the plurality of diverter pipes (420) are fixedly arranged on the baffle plate (100); the diverter pipes (420) extend along the width direction of the extension plate (140); the plurality of diverter pipes (420) are arranged at intervals along the length direction of the extension plate (140); each of the diverter pipes (420) is provided with a plurality of spray pipes (210); the plurality of spray pipes (210) are arranged at intervals along the extension direction of the diverter pipes (420); the plurality of diverter pipes (420) are all connected to the confluence pipe (430); the confluence pipe (430) connects the diverter pipes (420) and the water storage tank (410); and a water pump is arranged between the water storage tank (410) and the confluence pipe (430).

10. The dust suppression device for coal mining machine according to claim 9, characterized in that: The water storage tank (410) also has a liquid level prompt component, and the prompt component includes: Warning light (440); A trigger switch (450) is arranged in the water storage tank (410) and located at the bottom of the water storage tank (410), and the trigger switch (450) is electrically connected to the warning light (440); A float (460), wherein the float (460) is disposed in the water tank (410) and corresponds to the trigger switch (450). When the liquid level in the water tank (410) drops to the position of the trigger switch (450), the float (460) can trigger the trigger switch (450).

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