Dust falling device for underground coal mine

Abstract

The utility model discloses a dust falling device for an underground coal mine, which relates to the technical field of dust falling equipment and comprises a box body, a lifting component, a rotating component and a spraying component, the interior of the box body is divided into a first cavity and a second cavity through a connecting plate, the top of the box body is rotatably provided with a dust suction pipe communicating with the second cavity, and the dust suction pipe can move in the connecting pipe in the first direction; the lifting assembly is installed at the top of the box body and used for increasing the height of the dust suction pipe. The rotating assembly is mounted in the first cavity and can rotate the dust suction pipe while the height of the dust suction pipe is increased by the lifting assembly; the spraying assembly is used for carrying out dust falling treatment on dust sucked into the second cavity and comprises a water tank and a spray head part, the spray head part is communicated with the water tank through a water inlet pipe, a filter screen is arranged below the spray head part, and an air outlet pipe is arranged on the side wall of the second cavity. Through the arrangement, the dust collection height and direction of the dust falling device can be adjusted, so that the dust removal effect and the dust removal efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust reduction equipment, in particular to a dust reduction device for a coal mine. Background Art

[0002] Dust is a common problem in coal mining. The presence of dust poses a threat to workers' health and also reduces the reliability and life of electromechanical equipment. At present, although there are some mobile dust suppression devices in coal mines, they usually have the following problems: it is not convenient to adjust the height and direction of the dust suction fan, so the dust removal range is limited and the effect is not ideal. After the electromechanical equipment is completed, the surface temperature may be high, and the existing devices are not sufficient to dissipate sufficient heat, which may damage the key components inside the equipment.

[0003] Therefore, it is necessary to provide an adjustable dust reduction device in coal mines to improve the dust control effect and ensure the safe operation of electromechanical equipment. Utility Model Content

[0004] The utility model aims to provide a coal mine dust reduction device which can adjust the dust suction height and direction.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A dust reduction device for a coal mine, comprising:

[0007] A box body, wherein a connecting plate is provided inside the box body, and the connecting plate is used to divide the inner part of the box body into a first cavity and a second cavity. A dust suction pipe is rotatably provided on the top of the box body, and the dust suction pipe is connected with the second cavity through a connecting pipe provided in the first cavity, and the dust suction pipe can move along a first direction;

[0008] A lifting assembly is installed on the top of the box and is used to raise the height of the dust collection pipe;

[0009] A rotating assembly is installed in the first cavity and can rotate the dust suction pipe while the lifting assembly raises the dust suction pipe;

[0010] The spray assembly is used to reduce the dust sucked into the second cavity. The spray assembly includes a water tank installed on the outer wall of the box body and a nozzle component installed inside the second cavity. The nozzle component is connected to the water tank through a water inlet pipe. A filter is provided under the nozzle component. An outlet pipe for discharging dust-removed air is provided on the side wall of the second cavity.

[0011] Preferably, the lifting assembly comprises:

[0012] The motor is mounted on a fixing plate, and the fixing plate is arranged on a side wall in the first cavity;

[0013] A lead screw is rotatably mounted on the top of the box body along a first direction, and the lead screw passes through the top wall of the box body and is connected to the output end of the motor;

[0014] The slider is inserted into the lead screw and can drive the dust suction tube to move along the first direction together with the slider.

[0015] Preferably, power is transmitted between the motor and the lead screw via gears, a driving gear is fixedly mounted on the output end of the motor, and a driven gear meshing with the driving gear is mounted at a corresponding position of the lead screw.

[0016] Preferably, the rotating assembly includes a rotating column, which is rotatably mounted on the top of the box body along a first direction, and the rotating column passes through the slider and the top wall of the box body, a first driving pulley is mounted on the end of the screw located inside the first cavity, a first driven pulley is mounted on the end of the rotating column located in the first cavity, a second driving pulley is also mounted on the rotating column, a second driven pulley is fixedly mounted on the dust suction pipe, the second driving pulley and the second driven pulley are both arranged close to the upper side of the slider, the first driving pulley and the first driven pulley are driven by a first belt, and the second driving pulley and the second driven pulley are driven by a second belt.

[0017] Preferably, a slide groove is provided on the circumference of the rotating cylinder along the first direction, and a protrusion cooperating with the slide groove is provided on the inner side wall of the second driving pulley.

[0018] Preferably, the lead screw and the rotating column are located in the inner end of the first cavity and are respectively fixedly installed with a first mounting tube and a second mounting tube along the first direction. The first mounting tube and the second mounting tube pass through the connecting plate, and the nozzle component is arranged on the tube wall of the first mounting tube and the second mounting tube located in the second cavity.

[0019] Preferably, both the first mounting tube and the second mounting tube are rotatably connected to the water inlet pipe.

[0020] Preferably, a water outlet pipe is connected between the bottom of the second cavity and the water tank.

[0021] Preferably, the air inlet end of the dust suction pipe is provided with a trumpet-shaped opening.

[0022] Preferably, the corners of the bottom surface of the box body are respectively provided with universal wheels.

[0023] Compared with the above-mentioned background technology, the utility model provides a coal mine dust reduction device, comprising: a box body, a lifting assembly, a rotating assembly and a spray assembly; the box body is provided with a connecting plate inside, the connecting plate is used to divide the inner part of the box body into a first cavity and a second cavity, a dust suction pipe is rotatably provided on the top of the box body, the dust suction pipe is connected with the second cavity through a connecting pipe arranged in the first cavity, and the dust suction pipe can move along a first direction; a lifting assembly is installed on the top of the box body, and is used to increase the height of the dust suction pipe; a rotating assembly is installed in the first cavity, and can rotate the dust suction pipe while the lifting assembly increases the height of the dust suction pipe; a spray assembly is used to perform dust reduction treatment on the dust sucked into the second cavity, the spray assembly comprises a water tank installed on the outer side wall of the box body and a nozzle component installed inside the second cavity, the nozzle component is connected with the water tank through a water inlet pipe, a filter is arranged below the nozzle component, and an air outlet pipe for discharging the dust-removed air is arranged on the side wall of the second cavity.

[0024] Specifically, the cavity inside the box is divided into a first cavity and a second cavity by a connecting plate, and a dust suction pipe that can move vertically and rotate around its axis is penetrated on the top of the box, and a lifting assembly is arranged at the top of the box, and the lifting assembly can control the up and down movement of the dust suction pipe, and when the lifting assembly moves, the rotating assembly installed in the first cavity will also move at the same time, driving the dust suction pipe to adjust the height in the vertical direction and adjust the direction of dust suction by rotating, and the dust suction pipe will suck the dust into the second cavity through the connecting pipe, and then the dust will be sprayed and dusted by the spray assembly installed in the second cavity, wherein the water sprayed by the spray assembly through the nozzle component is provided by the water tank, and the dust will fall onto the filter net under the action of gravity after absorbing the water, and the air after dust removal will be discharged outward through the exhaust pipe. In this way, the dust removal device provided by the present application can adjust the height and direction of dust suction to increase the dust removal effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] FIG1 is a schematic diagram of the overall structure of a dust suppression device provided in an embodiment of the utility model;

[0027] FIG2 is a schematic diagram of the structure of FIG1 from another angle;

[0028] FIG3 is a schematic diagram of the internal structure of the dust suppression device provided in an embodiment of the utility model;

[0029] FIG. 4 is a schematic structural diagram of FIG. 3 from another angle.

[0030] in:

[0031] 100-box, 110-connecting plate, 120-first cavity, 130-second cavity, 140-dust suction pipe, 150-connecting pipe;

[0032] 200-lifting assembly, 210-motor, 211-fixed plate, 220-screw, 230-slider, 240-driving gear, 250-driven gear;

[0033] 300-rotating assembly, 310-rotating column, 311-sliding groove, 320-first driving pulley, 330-first driven pulley, 340-second driving pulley, 350-second driven pulley, 360-first belt drive, 370-second belt;

[0034] 400-spray assembly, 410-water tank, 420-water inlet pipe, 430-spray head component, 440-filter screen, 450-air outlet pipe, 460-first installation pipe, 470-second installation pipe, 480-water outlet pipe;

[0035] 500-Universal casters. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0039] The utility model aims to provide a coal mine dust reduction device which can adjust the dust suction height and direction.

[0040] It should be noted that, in this embodiment, the direction X in the drawings is defined as the first direction.

[0041] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0042] Please refer to Figures 1 to 4. This embodiment provides a coal mine dust reduction device, including: a box body 100, a lifting assembly 200, a rotating assembly 300 and a spray assembly 400; the box body 100 is provided with a connecting plate 110 inside, and the connecting plate 110 is used to divide the inside of the box body 100 into a first cavity 120 and a second cavity 130. A dust suction pipe 140 is rotatably provided on the top of the box body 100. The dust suction pipe 140 is connected to the second cavity 130 through a connecting pipe 150 provided in the first cavity 120, and the dust suction pipe 140 can move along a first direction; the lifting assembly 200 is installed on the top of the box body 100 and is used to lift the dust suction pipe 140; a rotating assembly 300, installed in the first cavity 120, capable of rotating the dust suction tube 140 while the lifting assembly 200 raises the height of the dust suction tube 140; a spray assembly 400, used to reduce dust brought into the second cavity 130, the spray assembly 400 includes a water tank 410 installed on the outer wall of the box body 100 and a nozzle component 430 installed inside the second cavity 130, the nozzle component 430 is connected to the water tank 410 through a water inlet pipe 420, a filter screen 440 is arranged below the nozzle component 430, and an air outlet pipe 450 for discharging dust-removed air is arranged on the side wall of the second cavity 130.

[0043] As shown in Figures 1 and 2, in this embodiment, the box body 100 is a square structure as a whole, and the internal cavity is divided into two parts by the connecting plate 110, wherein the upper part is the first cavity 120, which is used to install the rotating assembly 300 of the dust reduction device and the connecting pipe 150 connected to the dust suction pipe 140, and a fan is installed on the inner wall of the bottom end of the connecting pipe 150, and the lower part is the second cavity 130, and the dust sucked by the dust suction pipe 140 will be blown to the second cavity 130, and the dust reduction treatment is carried out in the second cavity 130; in this embodiment, dust reduction is carried out by spraying water in the second cavity 130, and the dust entering the second cavity 130 will become heavier and fall after absorbing water. In addition, a layer of filter screen 440 is arranged near the bottom of the box body 100, and the mesh size of the filter screen 440 can be adjusted according to actual conditions, and it is only necessary to ensure that the fallen dust can be received, and the filtered air will be discharged from the outlet pipe 450 through the filter screen 440.

[0044] That is, the cavity inside the box 100 is divided into a first cavity 120 and a second cavity 130 by the connecting plate 110, and a dust suction pipe 140 that can move vertically and rotate around its axis is provided on the top of the box 100, and a lifting assembly 200 is provided at the top position of the box 100, and the lifting assembly 200 can control the up and down movement of the dust suction pipe 140, and when the lifting assembly 200 moves, the rotating assembly 300 installed in the first cavity 120 will also move at the same time, driving the dust suction pipe 140 While adjusting the height in the vertical direction, the direction of dust collection can be adjusted by rotating. The dust collection pipe 140 will suck the dust into the second cavity 130 through the connecting pipe 150, and then the spray assembly 400 installed in the second cavity 130 will spray the dust to reduce dust, wherein the water sprayed by the spray assembly 400 through the nozzle component 430 is provided by the water tank 410, and the dust will fall onto the filter 440 under the action of gravity after absorbing the water, and the air after dust removal will be discharged outward through the air outlet pipe 450. In this way, the dust removal device provided by the present application can adjust the height and direction of dust collection to increase the dust removal effect and efficiency.

[0045] Preferably, the lifting assembly 200 includes: a motor 210, a screw 220 and a slider 230; the motor 210 is mounted on a fixed plate 211, and the fixed plate 211 is arranged on the side wall in the first cavity 120; the screw 220 is rotatably mounted on the top of the box body 100 along a first direction, and the screw 220 passes through the top wall of the box body 100 and is connected to the output end of the motor 210; the slider 230 is passed through the screw 220, and together with the slider 230, it can drive the dust collection tube 140 to move along the first direction.

[0046] As shown in Figures 3 and 4, a fixing plate 211 is provided near the top of the first cavity 120, and a motor 210 is installed on the fixing plate 211. The output shaft of the motor 210 passes through the fixing plate 211 vertically downward, and the lead screw 220 passes through the top of the box body 100 vertically. The end of the lead screw 220 located in the first cavity 120 is transmission-connected to the output end of the motor 210, and the outer wall of the lead screw 220 is threadedly connected with a slider 230. The slider 230 is arranged on the top of the box body 100 and is connected to the dust suction pipe 140; that is, after the motor 210 is working, it will drive the rotation of the lead screw 220, and the slider 230 will also move up and down accordingly, and the dust suction pipe 140 will telescope up and down in the connecting pipe 150 under the action of the slider 230, thereby adjusting the dust suction height of the dust suction pipe 140.

[0047] Preferably, power is transmitted between the motor 210 and the lead screw 220 via gears, a driving gear 240 is fixedly mounted on the output end of the motor 210 , and a driven gear 250 meshing with the driving gear 240 is mounted at a corresponding position of the lead screw 220 .

[0048] In this embodiment, the transmission method between the motor 210 and the lead screw 220 is specifically gear transmission. A driving gear 240 is fixedly installed at the output end of the motor 210, and a driven gear 250 is installed at the end of the lead screw 220 located in the first cavity 120, and the driving gear 240 and the driven gear 250 are just in a meshing state. In this way, the motor 210 can accurately control the height of the dust collection tube 140 by rotating the lead screw 220, and the gear transmission has the characteristic of stable transmission.

[0049] Of course, the transmission method between the motor 210 and the lead screw 220 can also be adjusted according to actual conditions, and this article does not make any specific restrictions, as long as the above purpose can be achieved.

[0050] Preferably, the rotating assembly 300 includes a rotating column 310, which is rotatably mounted on the top of the box 100 along a first direction, and the rotating column 310 passes through the slider 230 and the top wall of the box 100, and the end of the screw 220 located inside the first cavity 120 is equipped with a first driving pulley 320, and the end of the rotating column 310 located inside the first cavity 120 is equipped with a first driven pulley 330, and a second driving pulley 340 is also installed on the rotating column 310, and a second driven pulley 350 is fixedly sleeved on the dust suction pipe 140, and the second driving pulley 340 and the second driven pulley 350 are both arranged close to the upper side of the slider 230, and the first driving pulley 320 and the first driven pulley 330 are driven by a first belt 360, and the second driving pulley 340 and the second driven pulley 350 are driven by a second belt 370.

[0051] As shown in FIG3 , the rotating column 310 is vertically arranged on the top of the box body 100 and passes through the slider 230 to be movably connected with the slider 230. The end of the rotating column 310 located in the first cavity 120 is provided with a first driven pulley 330, and the corresponding position of the lead screw 220 is fixedly provided with a first driving pulley 320. The first driving pulley 320 is specifically located between the top wall of the box body 100 and the driven gear 250. When the lead screw 220 rotates under the action of the motor 210, the first driving pulley 320 will also rotate accordingly, and the first driving pulley 320 will drive the first driven pulley at the bottom of the rotating column 310 to rotate through the first belt 360 The second driven pulley 350 is also rotatably connected to the top of the slider 230. When the rotating column 310 rotates, the second driving pulley 340 will be rotated, and the second driving pulley 340 will drive the second driven pulley 350 to rotate through the second belt 370, thereby realizing the rotation of the dust suction pipe 140.

[0052] It can be understood that the motor 210 drives the driving gear 240 to rotate, the driving gear 240 drives the driven gear 250 to rotate, the driven gear 250 drives the lead screw 220 to rotate, the lead screw 220 drives the first driving pulley 320 to rotate, the first driving pulley 320 drives the first driven pulley to rotate through the first belt 360, and then drives the rotating column 310 to rotate; due to the rotation of the lead screw 220, the slider 230 is driven to move, and the slider 230 will drive the second driving pulley 340 and the second driven pulley 350 to move during the movement, and also drive the dust suction pipe 140 to move up and down. During the movement, due to the rotation of the rotating column 310, the first driving pulley 320 is connected to the second driven pulley 350 through the first belt 360. The first driving pulley 320 drives the second driven pulley 350 to rotate, and finally drives the dust suction pipe 140 to move up and down while rotating, and adjusts the height and direction of the dust suction pipe 140, so that the dust removal range is relatively wider and the dust removal effect is more ideal.

[0053] Preferably, a slide groove 311 is provided on the circumference of the rotating cylinder along the first direction, and a protrusion matching with the slide groove 311 is provided on the inner wall of the second driving pulley 340 .

[0054] It can be understood that in order to enable the second driving pulley 340 to transmit power to the rotating column, a slide groove 311 is provided on the outer wall of the rotating column in the vertical direction, and a protrusion matching the slide groove 311 is provided on the inner wall of the second driving pulley 340 .

[0055] Preferably, the lead screw 220 and the rotating column 310 are located in the inner end of the first cavity 120 and are respectively fixedly installed with a first mounting tube 460 and a second mounting tube 470 along the first direction, the first mounting tube 460 and the second mounting tube 470 pass through the connecting plate 110, and the nozzle component 430 is arranged on the tube wall of the first mounting tube 460 and the second mounting tube 470 located in the second cavity 130.

[0056] As shown in Figure 3, a first mounting tube 460 and a second mounting tube 470 with a hollow structure are provided in the box body 100. The first mounting tube 460 passes through the connecting plate 110 and is arranged at the bottom of the screw rod. The first mounting tube 460 passes through the connecting plate 110 and is arranged at the bottom end of the connecting column. That is to say, the first mounting tube 460 and the second mounting tube 470 can both rotate driven by the screw rod and the connecting column. In addition, the first mounting tube 460 and the second mounting tube 470 are provided with a plurality of nozzle assemblies in the part located in the second cavity 130.

[0057] Preferably, the first mounting pipe 460 and the second mounting pipe 470 are both rotatably connected to the water inlet pipe 420 .

[0058] Furthermore, the first mounting pipe 460 and the second mounting pipe 470 are both rotatably connected to the water inlet pipe 420. That is to say, when the motor 210 starts to work, the first mounting pipe 460 and the second mounting pipe 470 will also rotate accordingly. At this time, the water pump in the water inlet pipe 420 is controlled to draw water from the water tank 410 and spray it through the nozzle component 430, so that the dust sucked in by the dust suction pipe 140 can be reduced.

[0059] Preferably, a water outlet pipe 480 is connected between the bottom of the second cavity 130 and the water tank 410 .

[0060] In addition, in order to prevent excessive water accumulation in the box 100 and affect the dust removal effect, a water outlet pipe 480 is arranged at the bottom of the box 100. It should be noted that the water outlet pipe 480 is installed below the filter net 440. In this way, the filtered water can be transported back to the water tank 410 through the water pump in the water outlet pipe 480 for recycling, thereby reducing water waste.

[0061] Preferably, the air inlet end of the dust suction pipe 140 is provided with a trumpet-shaped opening.

[0062] It can be understood that such a configuration can increase the dust collection range of the dust collection pipe 140 and can increase the dust reduction efficiency of the dust reduction device.

[0063] Preferably, universal wheels 500 are respectively provided at the corners of the bottom surface of the box body 100 .

[0064] It can be understood that such a configuration can increase the flexibility and convenience of using the dust reduction device, and the dust reduction device can be easily moved to a suitable position for dust reduction.

[0065] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above is a detailed introduction to the embodiments provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A dust reduction device for coal mines, It is characterized in that include: A box body (100) is provided with a connecting plate (110) inside, the connecting plate (110) is used to divide the inside of the box body (100) into a first cavity (120) and a second cavity (130), a dust suction pipe (140) is rotatably provided on the top of the box body (100), the dust suction pipe (140) is connected to the second cavity (130) via a connecting pipe (150) provided in the first cavity (120), and the dust suction pipe (140) can move along a first direction; A lifting assembly (200) installed on the top of the box (100) and used to raise the height of the dust suction pipe (140); A rotating assembly (300) is installed in the first cavity (120) and is capable of rotating the dust suction pipe (140) while the lifting assembly (200) raises the dust suction pipe (140) to a higher height; A spray assembly (400) is used to perform dust reduction treatment on the dust sucked into the second cavity (130), the spray assembly (400) comprising a water tank (410) mounted on the outer wall of the box body (100) and a spray head component (430) mounted inside the second cavity (130), the spray head component (430) being connected to the water tank (410) via a water inlet pipe (420), a filter screen (440) being arranged below the spray head component (430), and an air outlet pipe (450) for discharging dust-removed air being arranged on the side wall of the second cavity (130).

2. The dust reduction device for coal mines according to claim 1, It is characterized in that The lifting assembly (200) comprises: A motor (210) is mounted on a fixing plate (211), wherein the fixing plate (211) is arranged on a side wall inside the first cavity (120); A lead screw (220) is rotatably mounted on the top of the box (100) along the first direction, and the lead screw (220) passes through the top wall of the box (100) and is connected to the output end of the motor (210); The slider (230) is inserted through the lead screw (220), and together with the slider (230) can drive the dust suction pipe (140) to move along the first direction.

3. The dust reduction device for coal mines according to claim 2, It is characterized in that Power is transmitted between the motor (210) and the lead screw (220) via gears; a driving gear (240) is fixedly mounted on the output end of the motor (210); and a driven gear (250) meshing with the driving gear (240) is mounted at a corresponding position of the lead screw (220).

4. The dust reduction device for coal mines according to claim 2, It is characterized in that The rotating assembly (300) comprises a rotating column (310), wherein the rotating column (310) is rotatably mounted on the top of the box (100) along a first direction, and the rotating column (310) passes through the slider (230) and the top wall of the box (100), the end of the lead screw (220) located inside the first cavity (120) is mounted with a first driving pulley (320), the end of the rotating column (310) located inside the first cavity (120) is mounted with a first driven pulley (330), and the rotating column (310) is mounted with a first driven pulley (330). A second driving pulley (340) is also installed on the moving column (310); a second driven pulley (350) is fixedly sleeved on the dust suction pipe (140); the second driving pulley (340) and the second driven pulley (350) are both arranged in close contact with the upper side of the slider (230); the first driving pulley (320) and the first driven pulley (330) are driven by a first belt (360); and the second driving pulley (340) and the second driven pulley (350) are driven by a second belt (370).

5. The dust reduction device for coal mines according to claim 4, It is characterized in that A sliding groove (311) is provided on the circumference of the rotating column along the first direction, and a protrusion matching the sliding groove (311) is provided on the inner side wall of the second driving pulley (340).

6. The dust reduction device for coal mines according to claim 4, It is characterized in that The lead screw (220) and the rotating column (310) are located in the first cavity (120) and have a first mounting tube (460) and a second mounting tube (470) fixedly mounted along the first direction at their inner end portions, the first mounting tube (460) and the second mounting tube (470) passing through the connecting plate (110), and the nozzle component (430) is arranged on the tube walls of the first mounting tube (460) and the second mounting tube (470) located in the second cavity (130).

7. The dust reduction device for coal mines according to claim 6, It is characterized in that The first mounting tube (460) and the second mounting tube (470) are both rotatably connected to the water inlet pipe (420).

8. The dust reduction device for coal mines according to claim 7, It is characterized in that A water outlet pipe (480) is connected between the bottom of the second cavity (130) and the water tank (410).

9. The dust reduction device for coal mines according to claim 1, It is characterized in that The air inlet end of the dust suction pipe (140) is provided with a trumpet-shaped opening.

10. The dust reduction device for coal mines according to claim 1, It is characterized in that Universal wheels (500) are respectively provided at the corners of the bottom surface of the box body (100).

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