A large-dip-angle working face pressure-reducing and dust-removing system

Abstract

The present application belongs to the field of coal mining dust removal equipment, and particularly relates to a large-dip-angle working face pressure reduction dust removal system, which comprises a supporting base, a horizontally assembled outer circular pipe fixedly connected to the supporting base, a middle circular pipe rotationally matched in the outer circular pipe, a spraying dust removal mechanism and a driving mechanism respectively connected to two ends of the middle circular pipe extending out of the outer circular pipe, and the driving mechanism fixedly connected to the supporting base; the middle circular pipe is sleeved outside an inner circular pipe, two annular plates fixedly arranged on the inner circular pipe are respectively sealingly and rotationally matched on two sides of an inner wall of the middle circular pipe, and a liquid chamber formed between the inner circular pipe, the middle circular pipe and the two annular plates is in communication with the spraying dust removal mechanism. The two ends of the middle circular pipe extending out of the outer circular pipe are respectively connected to the spraying dust removal mechanism and the driving mechanism, the driving mechanism can drive the spraying dust removal mechanism to rotate and move around through the middle circular pipe, the spraying dust removal mechanism can realize rotary motion spraying and dust removal, the spraying coverage range can be effectively expanded, multi-angle spraying can be realized, and the dust removal effect can be improved.

Description

Technical Field

[0001] This invention belongs to the field of coal mining dust removal equipment, specifically, it relates to a pressure reduction and dust removal system for steep-angle working faces. Background Technology

[0002] A working face with a coal seam dip angle of 35-55° is called a steep-angle coal mining face. According to actual measurements, during the mining process in a steep-angle coal mining face, the highest dust concentration can reach 8000 mg / m³ without any dust control measures. Dust generated during cutting accounts for approximately 60% to 80% of the total dust generated at the working face. High concentrations of dust not only cause pneumoconiosis but can also trigger coal dust explosions under certain conditions, seriously affecting mine safety and posing a significant threat to coal mine production safety and worker health. Therefore, dust removal devices must be used during coal mining. However, the coal mining machines used underground are all drum-type coal mining machines. The main dust removal method used during coal mining is water spraying. The water spraying structure equipped on the coal mining machine has limited effectiveness, only spraying at a fixed angle, resulting in a small coverage area and poor dust removal efficiency. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to propose a pressure reduction and dust removal system for large-angle working faces.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A pressure-reducing dust removal system for a large-angle working face includes: a support base; an outer circular tube fixedly connected to the support base in a horizontal direction; a middle circular tube rotatably fitted inside the outer circular tube; the two ends of the middle circular tube extending outside the outer circular tube are respectively connected to a spray dust removal mechanism and a drive mechanism; the drive mechanism is fixedly connected to the support base; the middle circular tube is sleeved on the outside of the inner circular tube; two annular plates fixed on the inner circular tube are respectively sealed and rotatably fitted on both sides of the inner wall of the middle circular tube; the liquid chamber formed between the inner circular tube, the middle circular tube, and the two annular plates is connected to the spray dust removal mechanism.

[0006] Preferably, the driving mechanism includes: a drive motor fixedly connected to the support base, a drive wheel keyed to the motor shaft of the drive motor, and a driven wheel connected to a driven wheel fixed to the middle circular tube via a belt drive.

[0007] Preferably, the inner tube is fixedly connected to the support base by a bracket; the end of the inner tube away from the spray dust removal mechanism is connected to the air intake of the negative pressure fan, and the air outlet of the fan is connected to the dust collector through a pipe.

[0008] Preferably, the large-angle working face pressure reduction and dust removal system further includes: a dust removal primary filtration mechanism; the dust removal primary filtration mechanism includes: a conical wind-gathering hood fixedly connected to the end of the inner circular pipe away from the negative pressure fan, an annular hood fixedly connected to the other end of the conical wind-gathering hood, a plurality of inner protrusions fixed on the inner wall of the annular hood, a sliding column slidably connected to each inner protrusion, a protruding edge provided at one end of the plurality of sliding columns near the conical wind-gathering hood, and the other end of the plurality of sliding columns connected to a circular filter plate slidably fitted inside the annular hood; a compression spring is sleeved on the column body of the sliding column located between the circular filter plate and the inner protrusion.

[0009] Preferably, the spray dust removal mechanism includes: a disc seat fixedly connected to one end of the central tube, and four spray components are evenly connected around the side of the disc seat near the central tube, and all four spray components are connected to the liquid chamber.

[0010] Preferably, the spray assembly includes: a swinging slide sleeve, one end of which is rotatably connected to a disc seat via a hinge shaft; a swinging slide arm is slidably connected to a slide rail at the other end of the swinging slide sleeve; a spray box with multiple spray heads is fixedly connected to the other end of the swinging slide arm; the spray box is sealed to the mounting hole of the central tube via a telescopic hose; the telescopic hose communicates with the liquid chamber; a movable shaft rotatably connected to the swinging slide arm is slidably fitted in the side grooves on both sides of the swinging slide sleeve; one end of the movable shaft is slidably fitted in the annular groove of the disc seat; the other end of the movable shaft is rotatably connected to one end of a rocker connecting rod; the other end of the rocker connecting rod is rotatably connected to the eccentric position of a rotating wheel; the rotating wheel is rotatably connected to the disc seat via a wheel axle; the rotating wheel meshes with an external gear ring fixed on the outer tube.

[0011] Preferably, multiple tension springs are fixedly connected between the swing arm and the inner side of the swing sleeve's slide rail.

[0012] Preferably, two arc-shaped guards are fixedly connected to the disc base, and the annular cover is rotatably fitted on the inner arc surface of the two arc-shaped guards.

[0013] Preferably, the two arc-shaped guards are fixedly connected to both ends of the right-angle scraper, and the guide post fixed in the middle of the right-angle scraper is slidably fitted in the guide hole in the center of the circular filter plate; the right-angle scraper is slidably fitted on the outer side of the circular filter plate, and both arc-shaped guards are located below the guide post.

[0014] Preferably, a water inlet pipe is provided on the annular plate away from the dust removal spraying mechanism, and the water inlet pipe is connected to a high-pressure water pump through a pipeline.

[0015] The present invention has the following beneficial effects:

[0016] In a large-angle working face pressure reduction and dust removal system of the present invention, the two ends of the middle circular tube extending to the outer circular tube are respectively connected to a spray dust removal mechanism and a drive mechanism. The drive mechanism can drive the spray dust removal mechanism to rotate and circle through the middle circular tube, realize the rotational motion spray dust removal, effectively expand the spray coverage area, spray at multiple angles, and improve the dust removal effect.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 A first-view schematic diagram of a pressure reduction and dust removal system for a steeply inclined working face provided in an embodiment of the present invention;

[0020] Figure 2 A second-view schematic diagram of the pressure reduction and dust removal system for a large-angle working face provided in an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of a pressure-reducing and dust removal system for a large-angle working face provided in an embodiment of the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the pressure reduction and dust removal system for a large-angle working face provided in an embodiment of the present invention;

[0023] Figure 5 A partial schematic diagram of the inner circular tube, the middle circular tube, and the two annular plates provided in an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of the driving mechanism provided in an embodiment of the present invention;

[0025] Figure 7 This is a first-view schematic diagram of the spray dust removal mechanism provided in an embodiment of the present invention;

[0026] Figure 8 This is a second-view schematic diagram of the spray dust removal mechanism provided in an embodiment of the present invention;

[0027] Figure 9 This is a first-view schematic diagram of the dust removal primary filter mechanism provided in an embodiment of the present invention;

[0028] Figure 10 This is a second-view schematic diagram of the dust removal primary filter mechanism provided in an embodiment of the present invention.

[0029] Icons: Support base 100; Outer tube 200; Outer gear ring 201; Middle tube 300; Spray dust removal mechanism 400; Disc seat 401; Swinging sliding sleeve 402; Swinging sliding arm 403; Spray box 404; Spray head 405; Telescopic hose 406; Movable shaft 407; Annular groove 408; Swinging connecting rod 409; Rotating wheel 410; Arc-shaped guard 411; Right-angle scraper 412; Guide column 413; Drive mechanism 500; Inner tube 600; Annular plate 601; Liquid chamber 602; Dust removal primary filter mechanism 700; Conical wind concentrator 701; Annular cover 702; Inner protrusion 703; Sliding column 704; Circular filter plate 705; Compression spring 706. Detailed Implementation

[0030] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0031] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] In this document, unless otherwise stated, the term "multiple" means two or more.

[0033] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0036] The following is in conjunction with the appendix Figure 1-10 The present invention will be described in further detail below.

[0037] Example 1

[0038] Please see the appendix Figure 1-10 A pressure-reducing dust removal system for a large-angle working face includes: a support base 100, an outer circular tube 200 fixedly connected to the support base 100 in a horizontal direction, a middle circular tube 300 rotatably fitted inside the outer circular tube 200, and two ends of the middle circular tube 300 extending outside the outer circular tube 200 respectively connected to a spray dust removal mechanism 400 and a drive mechanism 500, the drive mechanism 500 being fixedly connected to the support base 100; the middle circular tube 300 being sleeved outside an inner circular tube 600, two annular plates 601 fixed on the inner circular tube 600 being rotatably fitted on both sides of the inner wall of the middle circular tube 300 respectively, and a liquid chamber 602 formed between the inner circular tube 600, the middle circular tube 300 and the two annular plates 601 communicating with the spray dust removal mechanism 400; a water inlet pipe is provided on the annular plate 601 away from the spray dust removal mechanism 400, and the water inlet pipe is connected to a high-pressure water pump through a pipeline.

[0039] This invention discloses a pressure-reducing dust removal system for a steep-angle working face. A support base 100 is installed on the rocker arm of a coal mining machine, with the spray dust removal mechanism 400 facing the coal mining drum. During coal mining, a liquid chamber 602 formed between the inner circular tube 600, the middle circular tube 300, and two annular plates 601 is connected to a water supply device equipped with a high-pressure water pump. Spray water enters the spray dust removal mechanism 400 through the liquid chamber 602 and is sprayed onto the contact point between the coal mining drum and the coal, thereby removing dust generated during coal cutting. During dust removal, a drive mechanism 500 can also be activated. Activation of the drive mechanism 500 causes the middle circular tube 300 to rotate within the outer circular tube 200. The rotation of the middle circular tube 300 causes the spray dust removal mechanism 400 to rotate in a circular motion, creating a swirling motion. A ring-shaped spray coverage effectively expands the spray coverage area and reduces dust overflow. Multi-angle spraying effectively improves dust removal efficiency. In this invention, by installing the support base 100 on the rocker arm of the coal mining machine and aligning the spray dust removal mechanism 400 with the coal mining drum, it is ensured that the spray water directly acts on the vicinity of the coal cutting point, improving dust removal efficiency. The drive mechanism 500 rotates the middle circular tube 300 within the outer circular tube 200, thereby driving the spray dust removal mechanism 400 to rotate, forming a ring-shaped spray coverage, effectively expanding the spray range and improving the comprehensiveness of dust removal. The high-pressure water pump provides strong water pressure, enabling the spray water to penetrate coal dust more effectively, capturing and settling dust particles, and reducing dust overflow. The annular plate on the inner circular tube and the sealing rotational fit between the inner walls of the middle circular tube ensure the sealing of the liquid chamber, preventing leakage, while ensuring that the rotation of the inner circular tube is not affected.

[0040] The drive mechanism 500 includes: a drive motor fixedly connected to the support base 100; a drive wheel keyed to the motor shaft of the drive motor; and a driven wheel fixedly connected to the drive wheel on the central tube 300 via a belt drive. When the drive motor is turned on, it drives the drive wheel to rotate. When the drive wheel rotates, it drives the driven wheel to rotate via the belt, thereby driving the central tube 300 to rotate.

[0041] Example 2

[0042] Please see the appendix Figure 1-10The inner circular tube 600 is fixedly connected to the support base 100 via a bracket. The end of the inner circular tube 600 furthest from the spray dust removal mechanism 400 is connected to the suction port of the negative pressure fan, and the fan outlet is connected to the dust collector via a pipe. After the negative pressure fan starts, the dust generated during coal cutting is extracted through the inner circular tube 600 and transported to the dust collector for filtration. The dust collector can be a bag filter. As the spray dust removal mechanism 400 rotates, it forms an annular spray coverage ring, effectively expanding the spray coverage area and reducing dust overflow. Simultaneously, the inner circular tube 600, in conjunction with the negative pressure fan, performs negative pressure dust removal and filtration. Combining wet spraying and negative pressure suction, it can more effectively capture and remove dust particles of different sizes, improving overall dust removal efficiency. The spray coverage forms a water curtain, which can capture and settle airborne dust. The system effectively removes dust from the work surface, while negative pressure suction captures dust directly at the source, reducing its spread to the surrounding environment. Spray dust removal treats large dust particles, while negative pressure dust removal handles fine dust; the combination of these two methods addresses different types of dust, improving the overall effectiveness of the treatment. Optimizing the synergy between the spray and negative pressure systems can reduce overall energy consumption while maintaining dust removal efficiency. This comprehensive dust removal approach can more thoroughly remove dust from the work surface, providing a cleaner and safer working environment, protecting worker health, and allowing for flexible dust control by adjusting the intensity of the spray and negative pressure systems according to different working conditions and dust generation.

[0043] In this invention, the inner circular tube 600 serves multiple purposes. It not only works in conjunction with the middle circular tube 300 and the liquid chamber 602 formed between the two annular plates 601, but also functions with a negative pressure fan for negative pressure dust removal. By simultaneously undertaking the functions of spraying and negative pressure dust removal, the number of components in the system can be reduced, simplifying the overall design and lowering system complexity and installation difficulty. The single inner circular tube 600 achieves multiple functions, saving space in equipment layout, making the system more compact and easier to use in space-constrained working environments. Reducing the use of specialized components can lower material and manufacturing costs, and may also reduce maintenance and operating costs. The inner circular tube 600 integrates the paths of the spray liquid and the negative pressure airflow, potentially helping to optimize fluid flow paths, improve fluid efficiency, and reduce energy loss.

[0044] Furthermore, the coordinated arrangement of the inner circular tube 600 and the middle circular tube 300 ensures that the path of the negative pressure airflow is adjacent to the liquid chamber 602. During coal mining, the dust or particulate matter generated when the coal drum comes into contact with the coal contains heat. When the dust or particulate matter is drawn into the inner circular tube 600, the spray water flowing in the liquid chamber 602 between the inner circular tube 600 and the middle circular tube 300 can effectively absorb the heat in the dust, reduce the gas temperature, and improve the heat exchange efficiency. By reducing the temperature of the intake gas, thermal damage to the filter material of the subsequent dust collector can be reduced, extending the service life of the filter. Lower gas temperature is generally beneficial to improving the filtration efficiency of the dust collector because lower temperature reduces the viscosity of the gas, which helps to capture dust particles more effectively. It can also reduce the temperature of the gas discharged after filtration, which can improve the thermal comfort of the working environment and improve the working conditions of the workers.

[0045] Example 3

[0046] Please see the appendix Figure 1-10 The aforementioned large-angle working face pressure reduction and dust removal system further includes: a dust removal primary filter mechanism 700; the dust removal primary filter mechanism 700 includes: a conical wind-gathering hood 701 fixedly connected to the end of the inner circular tube 600 away from the negative pressure fan, the other end of the conical wind-gathering hood 701 fixedly connected to an annular hood 702, a plurality of inner protrusions 703 fixed on the inner wall of the annular hood 702, a sliding column 704 slidably connected to each inner protrusion 703, a protruding edge provided at one end of the plurality of sliding columns 704 near the conical wind-gathering hood 701, and the other end of the plurality of sliding columns 704 connected to a circular filter plate 705 slidably fitted inside the annular hood 702; a compression spring 706 is sleeved on the column of the sliding column 704 located between the circular filter plate 705 and the inner protrusion 703. The circular filter plate 705 inside the dust removal primary filter mechanism 700 is used to block large-volume coal particles generated during coal mining, preventing them from jumping into the inner circular pipe 600 and damaging the negative pressure fan and subsequent dust collector, without affecting the intake of dust and particulate matter. The cooperation between the conical wind-gathering hood 701 and the annular hood 702 helps guide the airflow, allowing it to pass more smoothly through the circular filter plate 705 and reducing airflow resistance. When the circular filter plate 705 is impacted, it can also drive multiple sliding columns 704 to slide on multiple inner protrusions 703 and compress multiple compression springs 706 to play a buffering and shock-absorbing role, reducing damage to the circular filter plate 705.

[0047] The circular filter plate 705 can effectively intercept large coal particles, preventing them from entering the negative pressure system and thus protecting the negative pressure fan and dust collector from damage. By intercepting large particles, it reduces the wear of large particles on the blades of the negative pressure fan and the filter bags of the dust collector. By intercepting large particles, it also allows the subsequent dust collector to focus more on capturing fine dust, improving the overall dust removal efficiency.

[0048] Example 4

[0049] Please see the appendix Figure 1-10 The spray dust removal mechanism 400 includes a disc base 401 fixedly connected to one end of the central tube 300. Four spray components are evenly connected around the side of the disc base 401 near the central tube 300, and all four spray components are connected to the liquid chamber 602. When the central tube 300 rotates, it can drive the four spray components to rotate and rotate, thereby realizing mobile spray dust removal and increasing the spray coverage area.

[0050] The spray assembly includes: a swing sleeve 402, one end of which is rotatably connected to a disc base 401 via a hinge shaft; a swing arm 403 is slidably connected to one end of a slide rail at the other end of the swing sleeve 402; a spray box 404 fixedly connected to the other end of the swing arm 403 is provided with multiple spray heads 405; the spray box 404 is sealed to the mounting hole of the central tube 300 via a telescopic hose 406; the telescopic hose 406 communicates with the liquid chamber 602; and a movable shaft 407 rotatably connected to the swing arm 403 is slidably engaged with the swing arm 402. In the side sliding grooves on both sides of the sliding sleeve 402, one end of the movable shaft 407 is slidably fitted in the annular sliding groove 408 of the disc seat 401, and the other end of the movable shaft 407 is rotatably connected to one end of the rocker connecting rod 409. The other end of the rocker connecting rod 409 is rotatably connected to the eccentric position of the rotating wheel 410. The rotating wheel 410 is rotatably connected to the disc seat 401 through a wheel axle. The rotating wheel 410 meshes with the external gear ring 201 fixed on the outer circular tube 200. Multiple tension springs are fixedly connected between the swing sliding arm 403 and the inner side of the slide of the swing sliding sleeve 402.

[0051] When the central tube 300 drives the disc seat 401 to rotate, the disc seat 401 drives multiple rotating wheels 410 to rotate and revolve. During this rotation, the contact position between the rotating wheels 410 and the external gear ring 201 on the outer tube 200 changes, causing the rotating wheels 410 to rotate around the axis of the wheel shaft. This rotation drives one end of the eccentrically positioned rocker link 409 to rotate and revolve. The other end of the rocker link 409 drives the movable shaft 407 to reciprocate within the annular groove 408 of the disc seat 401, thus... The movable swing sleeve 402 reciprocates around the axis of the hinge shaft at a certain angle. When the swing sleeve 402 swings, the movable shaft 407 slides in the side grooves on both sides of the swing sleeve 402, and drives the swing arm 403 to slide in the slide rail of the swing sleeve 402. This continuously causes the swing arm 403 to drive the spray box 404 and multiple spray heads 405 to swing, which can change the distance between the spray box 404 and multiple spray heads 405 and the center of the disc seat 401, forming different ranges of spray coverage effect, increasing the contact area with dust or dirt, and improving the dust removal effect.

[0052] Example 5

[0053] Please see the appendix Figure 1-10 Two arc-shaped guards 411 are fixedly connected to the disc base 401, and the annular cover 702 is rotatably fitted on the inner arc surface of the two arc-shaped guards 411. The two arc-shaped guards 411 are fixedly connected to both ends of the right-angle scraper 412, and the guide post 413 fixed in the middle of the right-angle scraper 412 is slidably fitted in the guide hole in the center of the circular filter plate 705; the right-angle scraper 412 is slidably fitted on the outer surface of the circular filter plate 705, and both arc-shaped guards 411 are located below the guide post 413. When the disc base 401 rotates, it drives the two arc-shaped guards 411 to rotate and revolve. As the disc base 401 rotates, the arc-shaped guards 411 drive the right-angle scraper 412 to scrape dust from the circular filter plate 705, achieving automatic cleaning without manual intervention, saving manpower and time. By cleaning the dust and powder on the surface of the filter plate, the dust removal performance of the circular filter plate 705 can be maintained. The guide column 413 slides in the guide hole in the center of the circular filter plate 705, providing positioning and guidance to ensure that the right-angle scraper is accurately positioned during the cleaning process and avoids deviation or bending. The dust scraping and cleaning function is integrated into the existing rotating structure without adding extra complexity, keeping the system structure compact and simple. The automatic cleaning function reduces system failures caused by filter plate clogging and improves the reliability and stability of the entire dust removal system.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

[0055] This invention is not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A pressure-reducing dust removal system for steeply inclined working faces, characterized in that, include: A support base (100) is fixedly connected to a transversely assembled outer round tube (200), and a middle round tube (300) is rotatably fitted inside the outer round tube (200). The two ends of the middle round tube (300) extending out of the outer round tube (200) are respectively connected to a spray dust removal mechanism (400) and a drive mechanism (500). The drive mechanism (500) is fixedly connected to the support base (100). The middle round tube (300) is sleeved on the outside of the inner round tube (600). Two annular plates (601) fixed on the inner round tube (600) are respectively sealed and rotatably fitted on both sides of the inner wall of the middle round tube (300). The liquid chamber (602) formed between the inner round tube (600), the middle round tube (300) and the two annular plates (601) is connected to the spray dust removal mechanism (400). The inner tube (600) is fixedly connected to the support base (100) by a bracket. The support base (100) is installed on the rocker arm of the coal mining machine. The spray dust removal mechanism (400) is set facing the coal mining drum of the coal mining machine. The end of the inner tube (600) away from the spray dust removal mechanism (400) is connected to the air inlet of the negative pressure fan. The air outlet of the fan is connected to the dust collector through a pipe. It also includes a dust removal primary filter mechanism (700); the dust removal primary filter mechanism (700) includes: a conical wind-gathering hood (701) fixedly connected to the end of the inner circular tube (600) away from the negative pressure fan, and an annular cover (702) fixedly connected to the other end of the conical wind-gathering hood (701). Multiple inner protrusions (703) are fixed on the inner wall of the annular cover (702). A sliding column (704) is slidably connected to each inner protrusion (703). Each of the multiple sliding columns (704) has a raised edge at one end near the conical wind-gathering hood (701). The other end of the multiple sliding columns (704) is connected to a circular filter plate (705) that is slidably fitted inside the annular cover (702). A compression spring (706) is sleeved on the column of the sliding column (704) located between the circular filter plate (705) and the inner protrusion (703). The spray dust removal mechanism (400) includes: a disc seat (401) fixedly connected to one end of the central tube (300), and four spray components are evenly connected around the side of the disc seat (401) near the central tube (300), and the four spray components are all connected to the liquid chamber (602). The spray assembly includes: a swing sleeve (402), one end of which is rotatably connected to a disc seat (401) via a hinge shaft; the other end of the swing sleeve (402) is slidably connected to one end of a swing arm (403) within a slide rail; the other end of the swing arm (403) is fixedly connected to a spray box (404) equipped with multiple spray heads (405); the spray box (404) is sealed to the mounting hole of a central tube (300) via a telescopic hose (406); the telescopic hose (406) communicates with a liquid chamber (602); and the swing arm (403) is rotatably connected to the swing arm (402). The movable shaft (407) on 03) is slidably fitted in the side grooves on both sides of the swing sleeve (402). One end of the movable shaft (407) is slidably fitted in the annular groove (408) of the disc seat (401). The other end of the movable shaft (407) is rotatably connected to one end of the swing connecting rod (409). The other end of the swing connecting rod (409) is rotatably connected to the eccentric position of the rotating wheel (410). The rotating wheel (410) is rotatably connected to the disc seat (401) through the wheel axle. The rotating wheel (410) meshes with the external gear ring (201) fixed on the outer tube (200). Two arc-shaped guards (411) are fixedly connected to the disc base (401), and the annular cover (702) is rotatably fitted on the inner arc surface of the two arc-shaped guards (411); Two arc-shaped guards (411) are fixedly connected to the two ends of the right-angle scraper (412). The guide post (413) fixed in the middle of the right-angle scraper (412) is slidably fitted in the guide hole in the center of the circular filter plate (705). The right-angle scraper (412) is slidably fitted on the outer surface of the circular filter plate (705). Both arc-shaped guards (411) are located below the guide post (413).

2. The pressure reduction and dust removal system for a large-angle working face according to claim 1, characterized in that, The drive mechanism (500) includes: a drive motor fixedly connected to the support base (100), a drive wheel keyed to the motor shaft of the drive motor, and a driven wheel fixedly connected to the middle round tube (300) via a belt drive.

3. The pressure reduction and dust removal system for a large-angle working face according to claim 1, characterized in that, Multiple tension springs are fixedly connected between the inner side of the slide rail of the swing arm (403) and the swing sleeve (402).

4. The pressure reduction and dust removal system for a large-angle working face according to claim 1, characterized in that, A water inlet pipe is provided on the annular plate (601) away from the spray dust removal mechanism (400), and the water inlet pipe is connected to a high-pressure water pump through a pipeline.

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