Dust removal device for coal face

Abstract

The dust removal device comprises a dust falling box body, a supporting column is vertically fixed to the middle of the bottom face of the dust falling box body, a flange base fixedly connected and installed outside a machine body of a mining machine head is coaxially fixed to the bottom face of the supporting column, and the front portion and the rear portion of the dust falling box body are open. And an air blowing assembly and a spraying assembly are installed at the front position and the rear position of the dust falling box body correspondingly. The mining machine head has the beneficial effects that the dust falling box body, the spraying assembly and the air blowing assembly move along the coal face along with the machine body of the mining machine head, so that spraying dust falling operation can be carried out in the mining process, and meanwhile, the spraying dust falling efficiency can be improved through the cooperative operation mode of the spraying assembly and the air blowing assembly; and a good dust removal effect on the coal face is ensured.

Description

Technical Field

[0001] This utility model relates to the field of dust removal auxiliary components for coal mining faces, specifically to a dust removal device for coal mining faces. Background Technology

[0002] In recent years, with the use of mechanized equipment with large cutting depth, high power, and large transportation capacity, the amount of dust generated during coal mining operations has increased significantly, especially in ultra-high mining faces. This problem is even more prominent. Specifically, since traditional dust suppression spraying equipment is usually placed on the ground, and the mining height far exceeds the effective range of the spraying equipment, dust escape and leakage are likely to occur, making dust control more difficult. Large amounts of dust seriously endanger the physical and mental health of coal miners. For mines with coal dust explosion hazards, the presence of floating coal dust seriously threatens the safe production of coal mines. Utility Model Content

[0003] The purpose of this utility model is to provide a dust removal device for coal mining faces to solve the above-mentioned problems. The dust suppression box, spraying components and blowing components can be installed together on the outside of the mining head of the coal mining equipment through the flange base at the bottom of the support column. Then, by moving the dust suppression box, spraying components and blowing components together with the mining head along the coal mining face, the dust suppression spraying operation can be carried out during the mining process. At the same time, the efficiency of dust suppression spraying can be improved by the coordinated operation of the spraying components and the blowing components, as detailed below.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This utility model provides a dust removal device for coal mining faces, including a dust collection box. A support column is vertically fixed in the middle of the bottom surface of the dust collection box, and a flange base is coaxially fixed to the bottom surface of the support column and fixedly installed on the outside of the machine body of the mining head. The dust collection box is open at both the front and the back, and a blower assembly and a spray assembly are respectively installed at the front and the back of the dust collection box.

[0006] The blower assembly is equipped with quick-release fasteners at both the upper and lower external positions. The quick-release fasteners are partially fixed to the upper and lower front positions of the dust collection box, and the blower assembly is detachably fixed to the front of the dust collection box via the quick-release fasteners.

[0007] The spray assembly is equipped with connecting parts on both sides of its external position. The connecting parts are located on both sides of the rear of the dust collection box, and the spray assembly is detachably fixed to the rear of the spray assembly through the connecting parts.

[0008] Preferably, the blower assembly includes an axial flow fan body and a clamp bracket. The axis of the axial flow fan body is arranged longitudinally, and the clamp bracket is coaxially fixed to the periphery of the axial flow fan body. The clamp bracket has vertically extended and fixed wing seats at both the upper and lower positions of its outer side. The quick-release fasteners are installed on the back of the wing seats at both the upper and lower positions, and the wing seats are detachably fixed to the front of the dust collection box through the quick-release fasteners.

[0009] Preferably, the airflow direction of the axial flow fan body is from front to back, and dust covers with perforated plate structures are coaxially installed at both the front and rear positions of the axial flow fan body.

[0010] Preferably, each of the quick-release fasteners includes a mating seat and a fixing sleeve. The mating seat is fixed longitudinally on the back of each of the wing seats. Limiting holes are opened vertically on the outer end faces of the mating seats at the upper and lower positions that are far apart from each other. The fixing sleeve is fixed longitudinally at the upper and lower positions of the front of the dust collection box. The front of each fixing sleeve is provided with a mating groove along the longitudinal direction. The mating groove corresponds one-to-one with the mating seat and slides longitudinally.

[0011] Preferably, the outer end faces of the fixed sleeves in the upper and lower positions that are far apart from each other are provided with mounting holes in the vertical direction. The mounting holes are all vertically connected to the corresponding mating grooves, and the mounting holes are all vertically coaxially aligned with the corresponding limiting holes. The mounting holes are all slidably fitted with limiting rods in the vertical coaxial direction, and the inner ends of the limiting rods in the upper and lower positions that are close to each other are vertically slidably fitted with the corresponding limiting holes. The outer ends of the limiting rods in the upper and lower positions that are far apart from each other extend out of the outer end face of the corresponding fixed sleeve and are coaxially fixed with handles. The portion of the limiting rod located between the corresponding handle and the outer end face of the fixed sleeve is coaxially fitted with a spring, and the two ends of the spring are respectively fixedly connected to the corresponding handle and the outer end face of the fixed sleeve.

[0012] Preferably, the cross-sectional shape of the mating seat and the mating groove along the horizontal and vertical planes are both rectangular, the mating grooves are all blind grooves in the longitudinal direction, and the rear end of the mating seat is in close contact with the rear end of the corresponding mating groove.

[0013] Preferably, the spray assembly includes a water supply pipe and a diversion pipe. One end of the water supply pipe is closed and is arranged laterally at the rear of the dust settling box. Both sides of the water supply pipe are detachably connected to the dust settling box via the combined connector. The portions of the water supply pipe located on both sides of the dust settling box are fixedly connected to multiple connecting pipes along the longitudinal direction. The rear ends of each connecting pipe are fixedly connected to the vertically arranged diversion pipe. The rear periphery of each diversion pipe is fixedly connected to multiple spray nozzles along the longitudinal direction.

[0014] Preferably, the unsealed end of the water supply pipe is coaxially fixed with a pipe joint for easy connection to external pipelines, and a valve for controlling opening and closing is installed on the outside of the water supply pipe near the pipe joint.

[0015] Preferably, each of the combined connectors includes a slot and a threaded sleeve. The slots are provided at the rear of both sides of the dust collection box, and the rear of the slots are open. The slots are symmetrically distributed on both sides. The threaded sleeves are coaxially fixed at the outer periphery of both sides of the water pipe. The threaded sleeves correspond one-to-one with the slots, and the threaded sleeves are locked in the corresponding slots by a sliding fit. Locking nuts are coaxially engaged on both sides of the threaded sleeves corresponding to the slots. The outer diameter of the locking nuts is larger than the vertical groove width of the slots, and the locking nuts are pressed against the side surface of the dust collection box.

[0016] The dust removal device for coal mining faces described above, specifically for dust removal at the coal mining face, allows the dust suppression box, spray assembly, and blower assembly to be installed together on the outside of the mining head of the coal mining equipment via the flange base at the bottom of the support column. The dust suppression box, spray assembly, and blower assembly move together with the mining head along the coal mining face, enabling spray dust suppression during mining operations. The coordinated operation of the spray assembly and blower assembly also improves the efficiency of spray dust suppression, ensuring a good dust removal effect on the coal mining face. Specifically, the spray assembly has a combined connector at both ends of the water pipe. By engaging the threaded sleeve of the combined connector with the slot and tightening the locking nuts at both ends, the spray assembly can be detachably fixed to the rear of the dust suppression box. Loosening the locking nuts allows the threaded sleeve to slide longitudinally out of the dust suppression box. The spray assembly is detached from the rear of the dust collection box by the rear end of the slot. The assembly and disassembly of the spray assembly at the rear of the dust collection box is simple and easy to implement. It is convenient to assemble the spray assembly at the rear of the dust collection box for spray dust removal, and it is also convenient to disassemble the spray assembly for cleaning and maintenance. Specifically, for the blower assembly, since quick-release fasteners are installed at both the upper and lower positions of the clamp bracket of the blower assembly, the longitudinal sliding engagement between the mating seat and the mating groove and the limiting rod are achieved. The vertical sliding engagement with the limiting hole allows the blower assembly to be detachably fixed to the front of the dust collection box. Simultaneously, simply pulling the limiting rod out of the limiting hole allows the mating seat to longitudinally disengage from the mating groove, thus detaching the blower assembly from the front of the dust collection box. The assembly and disassembly of the blower assembly at the front of the dust collection box is simple and easy to implement, facilitating both the assembly's use for blowing air and mist at the front of the dust collection box and subsequent disassembly for inspection and maintenance.

[0017] The beneficial effects are as follows: 1. This utility model can install the dust suppression box, spraying assembly and blower assembly together on the outside of the mining head of the coal mining equipment through the flange base at the bottom of the support column. Then, by moving the dust suppression box, spraying assembly and blower assembly together with the mining head along the coal mining face, the dust suppression spraying operation can be carried out during the mining process. At the same time, the coordinated operation of the spraying assembly and blower assembly can also improve the efficiency of dust suppression spraying, which is conducive to ensuring a good dust removal effect on the coal mining face.

[0018] 2. At both ends of the water supply pipe of the spray assembly, there are combination connectors. The spray assembly can be detachably fixed to the rear of the dust collection box by tightening the locking nuts at both ends after the threaded sleeve of the combination connector is inserted into the slot. At the same time, by simply loosening the locking nuts, the threaded sleeve can slide longitudinally out of the slot and the spray assembly can be removed from the rear of the dust collection box. The combination and disassembly of the spray assembly at the rear of the dust collection box is simple and easy to implement. It is convenient to combine the spray assembly at the rear of the dust collection box for spray dust removal, and it is also convenient to disassemble the spray assembly for cleaning and maintenance.

[0019] 3. Quick-release fasteners are installed at both the upper and lower positions of the clamp bracket of the blower assembly. The blower assembly can be detachably fixed to the front of the dust collection box by the longitudinal sliding engagement of the mating seat and the mating groove and the vertical sliding engagement of the limiting rod and the limiting hole. At the same time, by simply pulling the limiting rod out of the limiting hole, the mating seat can be longitudinally disengaged from the mating groove, and the blower assembly can be removed from the front of the dust collection box. The assembly and disassembly of the blower assembly at the front of the dust collection box is simple and easy to implement. It is convenient to assemble the blower assembly at the front of the dust collection box for blowing air and misting, and it is also convenient to remove the blower assembly for inspection and maintenance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an overall isometric schematic diagram of this utility model;

[0022] Figure 2 This is a utility model Figure 1 Cross-section diagram Figure 1 ;

[0023] Figure 3 This is a utility model Figure 1 Cross-section diagram Figure 2 ;

[0024] Figure 4 This is a utility model Figure 3 Enlarged view of a portion at point A;

[0025] Figure 5 This is a utility model Figure 1 A frontal view diagram;

[0026] Figure 6 This is a utility model Figure 1 A diagram showing the rear view.

[0027] The annotations in the attached figures are explained as follows:

[0028] 1. Dust settling chamber; 101. Support column; 102. Flange base; 2. Combined connector; 201. Slot; 202. Locking nut; 203. Threaded sleeve; 3. Spray assembly; 301. Valve; 302. Water supply pipe; 303. Pipe fitting; 304. Spray head; 305. Diverter pipe; 306. Connecting pipe; 4. Quick-release fastener; 401. Handle; 402. Spring; 403. Fixing sleeve; 404. Mating groove; 405. Mating seat; 406. Limiting rod; 407. Mounting hole; 408. Limiting hole; 5. Blower assembly; 501. Wing seat; 502. Clamp bracket; 503. Axial flow fan body; 504. Dust cover. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] See Figures 1-6 As shown, this utility model provides a dust removal device for coal mining faces, including a dust collection box 1. A support column 101 is vertically fixed to the center of the bottom surface of the dust collection box 1, and a flange base 102, which is fixedly connected to the outside of the machine body of the mining head, is coaxially fixed to the bottom surface of the support column 101. The dust collection box 1 is open at both the front and rear, and a blower assembly 5 and a spray assembly 3 are respectively installed at the front and rear positions of the dust collection box 1. Specifically, the blower assembly 5 includes an axial flow fan body 503 and a clamp bracket 502. The axis of the axial flow fan body 503 is arranged longitudinally. A clamp bracket 502 is coaxially fixed to the outer periphery of the axial flow fan body 503, and wing seats 501 are vertically extended and fixed at the upper and lower positions of the clamp bracket 502. Quick-release fasteners 4 are installed on the back of the upper and lower positions of the wing seats 501, and the wing seats 501 are detachably fixed to the front of the dust collection box 1 through the quick-release fasteners 4. The reason for this arrangement is that after the axial flow fan body 503 is electrically connected to the external power supply cable and powered on, the axial flow fan body 503 blows air backward, which blows water mist backward and diffuses it, thereby improving the dust reduction effect on the coal mining face.

[0031] Specifically, the spray assembly 3 includes a water supply pipe 302 and a diversion pipe 305. One end of the water supply pipe 302 is closed and is arranged laterally at the rear of the dust suppression box 1. At the same time, the outer sides of the water supply pipe 302 are detachably connected to the dust suppression box 1 through the combined connector 2. The portions of the water supply pipe 302 located on both sides of the dust suppression box 1 are fixedly connected to multiple connecting pipes 306 along the longitudinal direction. The rear ends of the connecting pipes 306 are fixedly connected to vertically arranged diversion pipes 305. At the same time, the rear periphery of the diversion pipes 305 is fixedly connected to multiple nozzles 304 along the longitudinal direction. With this arrangement, after the water supply pipe 302 is connected to the external water supply pipeline, preferably the external water supply pipeline should be a flexible hose with sufficient length, the water supply pipe 302 will transport water through the connecting pipes 306 to the nozzles 304 of the diversion pipes 305. The water mist will then be sprayed outward through the nozzles 304 to suppress dust at the coal mining face.

[0032] See Figures 1-4As shown, quick-release fasteners 4 are installed at both the upper and lower external positions of the blower assembly 5. The quick-release fasteners 4 are partially fixed to the upper and lower front positions of the dust collection box 1, and the blower assembly 5 is detachably fixed to the front of the dust collection box 1 via the quick-release fasteners 4. Specifically, each quick-release fastener 4 includes a mating seat 405 and a fixing sleeve 403. The back of the wing seat 501 is longitudinally fixed with a mating seat 405. Limiting holes 408 are vertically formed on the outer end faces of the mating seats 405 at the upper and lower positions that are far apart from each other. The front of the housing 1 is fixed with a fixing sleeve 403 at both the upper and lower positions along the longitudinal direction. Each fixing sleeve 403 has a longitudinally formed mating groove 404 on its front side. The mating groove 404 corresponds one-to-one with the mating seat 405 and slides longitudinally. The outer end faces of the fixing sleeves 403 at the upper and lower positions, which are far apart from each other, are vertically formed with mounting holes 407. Each mounting hole 407 is perpendicularly connected to the corresponding mating groove 404, and each mounting hole 407 is vertically coaxially aligned with the corresponding limiting hole 408. The mounting holes 407 slide along the vertical coaxial direction. The limit rods 406 are matched, and the inner ends of the limit rods 406 in the upper and lower positions that are close to each other are vertically slidably engaged with the corresponding limit holes 408. The outer ends of the limit rods 406 in the upper and lower positions that are far apart from each other extend out of the outer end face of the corresponding fixing sleeve 403 and are coaxially fixed with handles 401. The portions of the limit rods 406 located between the corresponding handles 401 and the outer end faces of the fixing sleeves 403 are coaxially fitted with springs 402 with clearance, and the two ends of the springs 402 are respectively engaged with the outer end faces of the corresponding handles 401 and fixing sleeves 403. The fixed connection allows the blower assembly 5 to be detachably fixed to the front of the dust collection box 1 by means of longitudinal sliding engagement between the mating seat 405 and the mating groove 404 and vertical sliding engagement between the limiting rod 406 and the limiting hole 408. At the same time, by simply pulling the limiting rod 406 out of the limiting hole 408, the mating seat 405 can be longitudinally disengaged from the mating groove 404, thus removing the blower assembly 5 from the front of the dust collection box 1. The assembly and disassembly of the blower assembly 5 at the front of the dust collection box 1 is simple and easy to implement.

[0033] See Figures 1-4As shown, combined connectors 2 are installed on both outer sides of the spray assembly 3. The combined connectors 2 are partially located on the rear sides of the dust settling box 1, and the spray assembly 3 is detachably fixed to the rear of the spray assembly 3 via the combined connectors 2. Specifically, each combined connector 2 includes a slot 201 and a threaded sleeve 203. Slots 201 are provided on the rear sides of both sides of the dust settling box 1, and the rear of each slot 201 is open. The slots 201 on both sides are symmetrically distributed. Threaded sleeves 203 are coaxially fixed on both outer sides of the water pipe 302. Each threaded sleeve 203 corresponds one-to-one with a slot 201, and the threaded sleeves 203 are slidably engaged in the corresponding slot 201. The threaded sleeve 203 is coaxially engaged with locking nuts 202 on both sides of the corresponding slot 201. The outer diameter of the locking nuts 202 is larger than the vertical groove width of the slot 201, and the locking nuts 202 are pressed against the side surface of the dust settling box 1. The purpose of this arrangement is that by inserting the threaded sleeve 203 of the combined connector 2 into the slot 201 and tightening the locking nuts 202 at both ends, the spray assembly 3 can be detachably fixed to the rear of the dust settling box 1. At the same time, by simply loosening the locking nuts 202, the threaded sleeve 203 can slide longitudinally out of the slot 201 and the spray assembly 3 can be removed from the rear of the dust settling box 1. The assembly and disassembly of the spray assembly 3 at the rear of the dust settling box 1 is simple and easy to implement.

[0034] See Figures 1-6As shown, the following optimizations were made to the blower assembly 5, quick-release fastener 4, and spray assembly 3. Specifically, for the blower assembly 5, the blowing direction of the axial flow fan body 503 is from front to back, and the dust cover 504 with a perforated plate structure is coaxially installed at both the front and rear positions of the axial flow fan body 503. With this setting, the axial flow fan body 503 can first disperse the water mist sprayed from the nozzle 304 by blowing air backward, thereby improving the dust reduction effect of the water mist. Specifically, regarding the quick-release fastener 4, both the mating seat 405 and the mating groove 404 have rectangular cross-sectional shapes along the horizontal and vertical planes. The mating groove 404 is a blind groove in the longitudinal direction, and the rear end of the mating seat 405 is in close contact with the rear end of the corresponding mating groove 404. This design facilitates good positioning and guidance when the mating seat 405 slides longitudinally along the mating groove 404. At the same time, during the process of the mating seat 405 sliding longitudinally along the mating groove 404, when the limiting hole 408 slides longitudinally with the mating seat 405 to be aligned vertically with the limiting rod 406, a clear indication can be provided by the way that the rear end of the mating seat 405 is in close contact with the rear end of the corresponding mating groove 404. Specifically, for the sprinkler assembly 3, the unclosed end of the water supply pipe 302 is coaxially fixed with a pipe joint 303 for easy connection with external pipelines. A valve 301 for controlling the opening and closing is installed on the outside of the water supply pipe 302 near the pipe joint 303. This arrangement facilitates the quick connection of the water supply pipe 302 with the external water supply pipeline through the pipe joint 303, and also facilitates the interruption control of the water inlet of the water supply pipe 302 through the valve 301.

[0035] With the above structure, when used for dust removal in coal mining faces, the dust suppression box 1, spray assembly 3, and blower assembly 5 can be installed together on the outside of the mining head of the coal mining equipment via the flange base 102 at the bottom of the support column 101. The dust suppression box 1, spray assembly 3, and blower assembly 5 can then move along the coal mining face with the mining head, enabling dust suppression spraying during mining. Furthermore, the coordinated operation of the spray assembly 3 and blower assembly 5 also improves dust reduction efficiency. The high efficiency of spray dust suppression helps ensure a good dust removal effect on the coal mining face. Specifically, for the spray assembly 3, since both ends of the water supply pipe 302 of the spray assembly 3 are equipped with combined connectors 2, the spray assembly 3 can be detachably fixed to the rear of the dust suppression box 1 by tightening the locking nuts 202 at both ends after the threaded sleeve 203 of the combined connector 2 is inserted into the slot 201. At the same time, by simply loosening the locking nuts 202, the threaded sleeve 203 can slide longitudinally out of the slot 201. The spray assembly 3 is then detached from the rear of the dust collection box 1. The assembly and disassembly of the spray assembly 3 at the rear of the dust collection box 1 is simple and easy to implement. This facilitates the assembly of the spray assembly 3 at the rear of the dust collection box 1 for spray dust removal, and also facilitates subsequent cleaning and maintenance after disassembly. As for the blower assembly 5, quick-release fasteners 4 are installed at both the upper and lower positions of the clamp bracket 502 of the blower assembly 5. Then, through the longitudinal sliding engagement of the mating seat 405 and the mating groove 404, and the limit rod 406 and the limit... The vertical sliding fit of hole 408 allows the blower assembly 5 to be detachably fixed to the front of the dust settling box 1. At the same time, by simply pulling the limiting rod 406 out of the limiting hole 408, the mating seat 405 can be longitudinally disengaged from the mating groove 404, thus removing the blower assembly 5 from the front of the dust settling box 1. The assembly and disassembly of the blower assembly 5 at the front of the dust settling box 1 is simple and easy to implement. It is convenient to assemble the blower assembly 5 at the front of the dust settling box 1 for blowing air and misting, and it is also convenient to remove the blower assembly 5 for inspection and maintenance later.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A dust removal device for coal mining faces, comprising a dust collection box (1), characterized in that: A support column (101) is vertically fixed in the middle of the bottom surface of the dust collection box (1), and a flange base (102) is coaxially fixed to the bottom surface of the support column (101) and is fixedly installed on the outside of the machine body of the mining head. The dust collection box (1) is open at both the front and the back, and a blower assembly (5) and a spray assembly (3) are respectively installed at the front and the back of the dust collection box (1). The blower assembly (5) is equipped with quick-release fasteners (4) at both the upper and lower external positions. The quick-release fasteners (4) are partially fixed at the upper and lower front positions of the dust collection box (1), and the blower assembly (5) is detachably fixed at the front of the dust collection box (1) through the quick-release fasteners (4). The spray assembly (3) is equipped with a combination connector (2) on both sides of its external position. The combination connector (2) is partially located on both sides of the rear of the dust collection box (1), and the spray assembly (3) is detachably fixed to the rear of the spray assembly (3) through the combination connector (2).

2. The dust removal device for a coal mining face according to claim 1, characterized in that: The blower assembly (5) includes an axial flow fan body (503) and a clamp bracket (502). The axis of the axial flow fan body (503) is arranged longitudinally. The clamp bracket (502) is coaxially fixed to the periphery of the axial flow fan body (503). The clamp bracket (501) is vertically extended and fixed to the upper and lower positions of the outer side. The quick-release fastener (4) is installed on the back of the upper and lower positions of the clamp bracket (501). The clamp bracket (501) is detachably fixed to the front of the dust collection box (1) through the quick-release fastener (4).

3. The dust removal device for a coal mining face according to claim 2, characterized in that: The air blowing direction of the axial flow fan body (503) is from front to back, and the dust cover (504) with a perforated plate structure is coaxially installed at both the front and rear positions of the axial flow fan body (503).

4. A dust removal device for a coal mining face according to claim 2 or 3, characterized in that: Each quick-release fastener (4) includes a mating seat (405) and a fixing sleeve (403). The back of each wing seat (501) is fixed with the mating seat (405) along the longitudinal direction. The outer end faces of the mating seats (405) in the upper and lower positions that are far apart from each other are provided with limit holes (408) along the vertical direction. The upper and lower positions of the front of the dust collection box (1) are fixed with the fixing sleeve (403) along the longitudinal direction. The front of each fixing sleeve (403) is provided with a mating groove (404) along the longitudinal direction. The mating groove (404) corresponds one-to-one with the mating seat (405) and slides longitudinally.

5. A dust removal device for a coal mining face according to claim 4, characterized in that: The outer end faces of the fixed sleeves (403) in the upper and lower positions, which are far apart from each other, are all provided with mounting holes (407) in the vertical direction. The mounting holes (407) are all vertically connected to the corresponding mating grooves (404), and the mounting holes (407) are all vertically coaxially aligned with the corresponding limiting holes (408). The mounting holes (407) are all vertically coaxially fitted with limiting rods (406), and the inner ends of the limiting rods (406) in the upper and lower positions, which are close to each other, are all aligned with the corresponding limiting holes (408). 8) Vertical sliding fit, the outer ends of the limiting rods (406) in the upper and lower positions that are far apart from each other extend out of the outer end face of the corresponding fixed sleeve (403) and are coaxially fixed with a handle (401). The portion of the limiting rod (406) located between the corresponding handle (401) and the outer end face of the fixed sleeve (403) is coaxially fitted with a spring (402), and the two ends of the spring (402) are respectively fixedly connected to the corresponding handle (401) and the outer end face of the fixed sleeve (403).

6. A dust removal device for a coal mining face according to claim 5, characterized in that: The mating seat (405) and the mating groove (404) are both rectangular in cross-sectional shape along the horizontal and vertical planes. The mating groove (404) is a blind groove in the longitudinal direction. The rear end of the mating seat (405) is in close contact with the rear end of the corresponding mating groove (404).

7. A dust removal device for a coal mining face according to claim 1, 5, or 6, characterized in that: The spray assembly (3) includes a water supply pipe (302) and a diversion pipe (305). One end of the water supply pipe (302) is closed and is arranged laterally at the rear of the dust settling box (1). At the same time, the outer sides of the water supply pipe (302) are detachably connected to the dust settling box (1) through the combined connector (2). The portion of the water supply pipe (302) located on both sides of the dust settling box (1) is fixedly connected to multiple connecting pipes (306) along the longitudinal direction. The rear end of each connecting pipe (306) is fixedly connected to the vertically arranged diversion pipe (305). At the same time, the rear periphery of the diversion pipe (305) is fixedly connected to multiple nozzles (304) along the longitudinal direction.

8. A dust removal device for a coal mining face according to claim 7, characterized in that: The unclosed end of the water supply pipe (302) is coaxially fixed with a pipe joint (303) for easy connection with external pipelines. A valve (301) for controlling opening and closing is installed on the outside of the water supply pipe (302) near the pipe joint (303).

9. A dust removal device for a coal mining face according to claim 8, characterized in that: Each of the combined connectors (2) includes a slot (201) and a threaded sleeve (203). The slots (201) are provided at the rear of both sides of the dust collection box (1). The rear of the slots (201) is open and the slots (201) at both sides are symmetrically distributed. The threaded sleeves (203) are coaxially fixed at the outer periphery of both sides of the water pipe (302). The threaded sleeves (203) correspond one-to-one with the slots (201) and the threaded sleeves (203) are all locked in the corresponding slots (201) in a sliding fit. The threaded sleeves (203) are coaxially engaged with locking nuts (202) at the positions on both sides of the corresponding slots (201). The outer diameter of the locking nuts (202) is larger than the vertical groove width of the slots (201) and the locking nuts (202) are all pressed against the side surface of the dust collection box (1).

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