Pressure reduction and dust removal system for large-dip-angle working face

Abstract

The invention belongs to the field of coal mining dust removal equipment, and particularly relates to a large-dip-angle working face depressurization dust removal system which comprises a supporting base, a transversely-assembled outer circular pipe is fixedly connected to the supporting base, a middle circular pipe is rotationally matched with the interior of the outer circular pipe, and the two ends, extending out of the outer circular pipe, of the middle circular pipe are connected with a spraying dust removal mechanism and a driving mechanism correspondingly. The driving mechanism is fixedly connected to the supporting base; the middle round pipe is arranged on the outer side of the inner round pipe in a sleeving mode, the two annular plates fixed to the inner round pipe are arranged on the two sides of the inner wall of the middle round pipe in a sealed rotating fit mode correspondingly, and a liquid cavity formed among the inner round pipe, the middle round pipe and the two annular plates communicates with the spraying dust removal mechanism. The two ends, extending out of the outer circular pipe, of the middle circular pipe are connected with the spraying dust removal mechanism and the driving mechanism correspondingly, the driving mechanism can drive the spraying dust removal mechanism to conduct rotary surrounding motion through the middle circular pipe, rotary motion spraying dust removal is achieved, the spraying coverage range is effectively expanded, multi-angle spraying is achieved, and the dust removal effect is improved.

Description

Technical Field

[0001] The invention belongs to the field of coal mining dust removal equipment, and in particular relates to a pressure reduction dust removal system for a large-angle working face. Background Art

[0002] The working face with a coal seam inclination of 35-55° is called a high-angle coal mining face. According to actual measurements, the maximum dust concentration can reach 8000mg / m3 without taking any dust prevention measures during the coal mining process. The cutting dust accounts for about 60% to 80% of the total dust produced by the working face. High-concentration dust can not only cause pneumoconiosis, but may also cause coal dust explosion accidents under certain conditions, seriously affecting the safe production of mines, and is prone to safety accidents, which greatly threatens the safety of coal mine production and the health of workers. Therefore, dust removal devices must be used in the coal mining process. The coal mining machines used in coal mines are all drum-type coal mining machines. The dust removal method used in the coal mining process is mainly water sprinkling. The watering effect of the watering structure equipped with the coal mining machine is limited. It can only spray dust at a fixed angle, with a small coverage range and poor dust removal effect. Summary of the invention

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

[0004] The purpose of the present invention is achieved through the following technical solutions: A pressure reduction and dust removal system for a working surface with a large inclination angle comprises: a support base, a transversely assembled outer circular tube fixedly connected to the support base, a middle circular tube rotatably fitted inside the outer circular tube, two ends of the middle circular tube extending outside the outer circular tube are respectively connected to a spray dust removal mechanism and a driving mechanism, and the driving 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, and a 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.

[0005] Preferably, the driving mechanism comprises: a driving motor fixedly connected to the supporting base, a driving wheel keyed to the motor shaft of the driving motor, and the driving wheel connected to a driven wheel fixed to the middle circular tube via a belt drive.

[0006] Preferably, the inner circular tube is fixedly connected to the supporting base via a bracket; one end of the inner circular tube away from the spray dust removal mechanism is connected to the air suction port of the negative pressure fan, and the air outlet of the fan is connected to the dust collector via a pipeline.

[0007] Preferably, the high-angle working surface pressure reduction and dust removal system described above also includes: a dust removal primary filtration mechanism; the dust removal primary filtration mechanism includes: a conical wind collecting hood fixedly connected to one end of the inner circular tube away from the negative pressure fan, the other end of the conical wind collecting hood is fixedly connected to the annular hood, a plurality of inner protrusions are fixed to the inner wall of the annular hood, each inner protrusion is slidably connected to a sliding column, a plurality of sliding columns are provided with a convex edge at one end close to the conical wind collecting hood, and the other ends of the plurality of sliding columns are connected to a circular filter plate that is slidably fitted in the annular hood; a compression spring is sleeved on the columnar body of the sliding column located between the circular filter plate and the inner protrusion.

[0008] Preferably, the spray dust removal mechanism comprises: a disc seat fixedly connected to one end of the central circular tube, four spray assemblies evenly connected around the side of the disc seat close to the central circular tube, and the four spray assemblies are all connected to the liquid chamber.

[0009] Preferably, the spray assembly comprises: a swing sleeve, one end of the swing sleeve is rotatably connected to the disc seat through a hinge shaft, the other end of the swing sleeve is slidably connected to one end of the swing slide arm in a slideway, and a plurality of spray heads are provided on a spray box fixedly connected to the other end of the swing slide arm, the spray box is sealed and connected to the mounting hole of the middle circular tube through a telescopic hose, and the telescopic hose is connected to the liquid chamber; a movable shaft rotatably connected to the swing slide arm slides in side grooves on both sides of the swing sleeve, one end of the movable shaft slides in the annular groove of the disc seat, the other end of the movable shaft is rotatably connected to one end of the swing connecting rod, the other end of the swing connecting rod is rotatably connected to the eccentric position of the rotating wheel, and the rotating wheel is rotatably connected to the disc seat through the wheel axle; the rotating wheel is meshed with an outer gear ring fixed on the outer circular tube.

[0010] Preferably, a plurality of tension springs are fixedly connected between the swing slide arm and the inner side surface of the slideway of the swing slide sleeve.

[0011] Preferably, two arc-shaped guard frames are fixedly connected to the disc seat, and the annular cover is rotatably fitted on the inner arc surfaces of the two arc-shaped guard frames.

[0012] Preferably, the two arc-shaped guard frames are fixedly connected to the two ends of the right-angle scraper, and the guide column fixed in the middle of the right-angle scraper slides in the guide hole in the center of the circular filter plate; the right-angle scraper slides on the outer surface of the circular filter plate, and the two arc-shaped guard frames are located below the guide column.

[0013] Preferably, a water inlet pipe is provided on the annular plate away from the spray dust removal mechanism, and the water inlet pipe is connected to the high-pressure water pump through a pipeline.

[0014] The present invention has the following beneficial effects: In a high-angle working surface pressure reduction and dust removal system of the present invention, 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 driving mechanism. The driving mechanism can drive the spray dust removal mechanism to rotate and orbit through the middle circular tube to realize rotary motion spray dust removal, effectively expand the spray coverage range, spray at multiple angles, and improve the dust removal effect.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 A schematic diagram of a first-viewing angle reduction and dust removal system for a large-angle working surface provided by an embodiment of the present invention; Figure 2 A schematic diagram from a second perspective of a pressure reduction and dust removal system for a large-angle working surface provided by an embodiment of the present invention; Figure 3 A cross-sectional view of a pressure reduction and dust removal system for a large-angle working surface provided by an embodiment of the present invention; Figure 4 A partial cross-sectional view of a pressure reduction and dust removal system for a large-angle working surface provided by an embodiment of the present invention; Figure 5 A partial schematic diagram of an inner circular tube, a middle circular tube and two annular plates provided in an embodiment of the present invention; Figure 6 A schematic diagram of a driving mechanism provided by an embodiment of the present invention; Figure 7 A schematic diagram of a spray dust removal mechanism provided by an embodiment of the present invention from a first perspective; Figure 8 A schematic diagram of a spray dust removal mechanism provided by an embodiment of the present invention from a second viewing angle; Fig. 9 A schematic diagram of a dust removal and primary filtration mechanism provided by an embodiment of the present invention from a first perspective; Fig.10 A schematic diagram from a second perspective of the dust removal and primary filtration mechanism provided in an embodiment of the present invention.

[0018] Icons: support base 100; outer circular tube 200; outer gear ring 201; middle circular tube 300; spray dust removal mechanism 400; disc seat 401; swing sleeve 402; swing slide arm 403; spray box 404; spray head 405; telescopic hose 406; movable shaft 407; annular slide 408; swing connecting rod 409; rotating wheel 410; arc guard frame 411; right-angle scraper 412; guide column 413; driving mechanism 500; inner circular tube 600; annular plate 601; liquid chamber 602; dust removal primary filter mechanism 700; conical wind gathering hood 701; annular hood 702; inner protrusion 703; slide column 704; circular filter plate 705; compression spring 706. DETAILED DESCRIPTION

[0019] The following description and accompanying drawings fully illustrate the specific embodiments of this article so that those skilled in the art can practice them. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of this article includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, without requiring or implying any actual relationship or order between these elements. In fact, the first element can also be called the second element, and vice versa. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the structure, device or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such structure, device or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the structure, device or equipment including the elements. Each embodiment is described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0020] The terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in this document indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this document and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of this document, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, it can also be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] As used herein, the term "plurality" means two or more than two, unless otherwise specified.

[0022] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0023] In this article, the term "and / or" is a description of the association relationship between objects, indicating that three relationships may exist. For example, A and / or B means: A or B, or, A and B.

[0024] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0025] The following is combined with Figure 1-10 The present invention is described in further detail.

[0026] Embodiment 1 Please see attached Figure 1-10 A pressure reduction and dust removal system for a large-angle working surface comprises: a support base 100, a transversely assembled outer circular tube 200 is fixedly connected to the support base 100, the outer circular tube 200 is rotatably matched with a middle circular tube 300, and the two ends of the middle circular tube 300 extending outside the outer circular tube 200 are respectively connected to a spray dust removal mechanism 400 and a driving mechanism 500, and the driving mechanism 500 is fixedly connected to the support base 100; the middle circular tube 300 is sleeved on the outside of the inner circular tube 600, and two annular plates 601 fixed on the inner circular tube 600 are respectively sealed and rotatably matched on both sides of the inner wall of the middle circular tube 300, and a liquid chamber 602 formed between the inner circular tube 600, the middle circular tube 300 and the two annular plates 601 is connected to 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.

[0027] A high-angle working face pressure reduction and dust removal system of the present invention can install a support base 100 on the rocker arm of the coal mining machine, and make the spray dust removal mechanism 400 be arranged toward the coal mining drum of the coal mining machine. When mining coal, the liquid chamber 602 formed between the inner circular tube 600, the middle circular tube 300 and the two annular plates 601 is connected to a water supply device with a high-pressure water pump, and the spray water enters the spray dust removal mechanism 400 through the liquid chamber 602, and is sprayed at the contact point between the coal mining drum and the coal through the spray dust removal mechanism 400, so that the dust generated when the coal is cut is sprayed, which plays a role in dust removal; when removing dust, the driving mechanism 500 can also be started. After the driving mechanism 500 is started, it drives the middle circular tube 300 to rotate in the outer circular tube 200. When the middle circular tube 300 rotates, it can drive the spray dust removal mechanism 400 to rotate and surround, so that the spray dust removal mechanism 400 forms a An annular spray coverage circle effectively expands the spray coverage range and reduces the amount of dust overflow, and sprays at multiple angles to effectively improve the dust removal effect. In the present invention, by installing the support base 100 on the rocker arm of the coal mining machine and making the spray dust removal mechanism 400 face the coal mining drum, it can be ensured that the spray water directly acts near the coal cutting point, thereby improving the dust removal efficiency. The driving mechanism 500 is used to rotate the middle circular tube 300 in the outer circular tube 200, thereby driving the spray dust removal mechanism 400 to rotate, forming an annular spray coverage circle, effectively expanding the spray range and improving the comprehensiveness of dust removal. A high-pressure water pump is used to provide strong water pressure, so that the spray water can more effectively penetrate the coal dust, capture and settle dust particles, and reduce dust overflow. The annular plate on the inner circular tube is sealed and rotated with the inner wall of the middle circular tube on both sides to ensure the sealing of the liquid chamber and prevent leakage, while ensuring that the rotation of the inner circular tube is not affected.

[0028] The driving mechanism 500 includes: a driving motor fixedly connected to the supporting base 100, a driving wheel connected to the motor shaft of the driving motor through a key, and the driving wheel is connected to a driven wheel fixed to the middle round tube 300 through a belt drive. When the driving motor is turned on, the driving wheel is driven to rotate, and when the driving wheel rotates, the driven wheel is driven to rotate through the belt, thereby driving the middle round tube 300 to rotate through the driven wheel.

[0029] Embodiment 2 Please see attached Figure 1-10The inner tube 600 is fixedly connected to the support base 100 through a bracket; the end of the inner tube 600 away 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 through a pipe. After the negative pressure fan is started, the dust generated when cutting coal can be extracted through the inner tube 600 and transported to the dust collector for filtering and dust removal. The dust collector can adopt a bag dust collector, which forms an annular spray coverage circle when rotating through the spray dust removal mechanism 400, effectively expanding the spray coverage range and reducing the amount of dust overflow. At the same time, the inner tube 600 cooperates with the negative pressure fan to perform negative pressure dust removal and dust filtration. Combining the two dust removal methods of wet spraying and negative pressure suction can more effectively capture and remove dust particles of different particle sizes, thereby improving the overall dust removal efficiency; the spray coverage forms a water curtain, which can capture and settle dust in the air. The system can remove dust from the working surface more thoroughly, provide a cleaner and safer working environment, and protect the health of workers. It can also adjust the intensity of the spray and negative pressure systems according to different working conditions and dust generation conditions to achieve flexible dust removal control.

[0030] In the present invention, the inner circular tube 600 is a multi-purpose tube. It not only cooperates with the liquid chamber 602 formed between the middle circular tube 300 and the two annular plates 601, but is also used to cooperate with the negative pressure fan for negative pressure dust removal. The inner circular tube 600 simultaneously assumes the functions of spraying and negative pressure dust removal, which can reduce the number of components in the system, simplify the overall design, and reduce the complexity and installation difficulty of the system. A single inner circular tube 600 realizes multiple functions, which can save space in the equipment layout, making the system more compact and convenient for use in a working environment with limited space. Reducing the use of special components can reduce 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, which may help optimize the flow path of the fluid, improve fluid efficiency, and reduce energy loss.

[0031] In addition, the coordinated arrangement of the inner circular tube 600 and the middle circular tube 300 makes the path of the negative pressure airflow adjacent to the liquid chamber 602. During the coal mining process, the dust or powder generated when the coal mining drum contacts the coal contains heat. When the dust or powder 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 temperature of the gas, and improve the heat exchange efficiency; by reducing the temperature of the inhaled gas, the thermal damage to the subsequent dust collector filter material can be reduced and the service life of the filter can be extended; lower gas temperature is usually beneficial to improving the filtration efficiency of the dust collector, because the lower temperature can reduce the viscosity of the gas, which helps to more effectively capture dust particles, and can also reduce the temperature of the exhaust gas after filtration, which can improve the thermal comfort of the working environment and improve the working conditions of the workers.

[0032] Embodiment 3 Please see attached Figure 1-10 The described high-angle working face pressure reduction and dust removal system also includes: a dust removal primary filter mechanism 700; the dust removal primary filter mechanism 700 includes: a conical wind collecting hood 701 fixedly connected to one end of the inner circular tube 600 away from the negative pressure fan, the other end of the conical wind collecting hood 701 is fixedly connected to the annular cover 702, and a plurality of inner protrusions 703 are fixed to the inner wall of the annular cover 702, each inner protrusion 703 is slidably connected to a sliding column 704, and a plurality of sliding columns 704 are provided with a convex edge at one end close to the conical wind collecting hood 701, and the other ends of the plurality of sliding columns 704 are connected to a circular filter plate 705 that is slidably fitted in the annular cover 702; the sliding column 704 is located between the circular filter plate 705 and the inner protrusion 703 and is sleeved with a compression spring 706. The circular filter plate 705 in the dust removal primary filter mechanism 700 is used to block large-volume coal particles generated during coal mining, prevent large-volume coal particles from jumping into the inner circular tube 600 and causing damage to the negative pressure fan and subsequent dust collector, and does not affect the suction of dust and powder; the cooperation of the conical wind collecting hood 701 and the annular hood 702 helps to guide the airflow, so that the airflow can pass through the circular filter plate 705 more smoothly, reducing airflow resistance, and when the circular filter plate 705 is hit, it can also drive multiple sliding columns 704 to slide on multiple inner protrusions 703 and compress multiple compression springs 706 to play a role in buffering and shock absorption, thereby reducing damage to the circular filter plate 705.

[0033] The circular filter plate 705 can effectively intercept large-volume coal particles and prevent them from entering the negative pressure system, thereby protecting the negative pressure fan and dust collector from damage; by intercepting large particles, the wear of large particles on the negative pressure fan blades and dust collector filter bags is reduced. By intercepting large particles, the subsequent dust collector can also focus more on capturing fine dust, thereby improving the overall dust removal efficiency.

[0034] Embodiment 4 Please see attached Figure 1-10 The spray dust removal mechanism 400 includes: a disc seat 401 fixedly connected to one end of the middle round tube 300, and four spray assemblies are evenly connected around the side of the disc seat 401 close to the middle round tube 300, and the four spray assemblies are connected to the liquid chamber 602. When the middle round tube 300 rotates, it can drive the four spray assemblies to rotate and circle, thereby realizing dynamic spray dust removal and increasing the spray coverage area.

[0035] The spray assembly includes: a swing sleeve 402, one end of the swing sleeve 402 is rotatably connected to the disc seat 401 through a hinge shaft, the other end of the swing sleeve 402 is slidably connected to one end of a swing slide arm 403 in a slideway, and a spray box 404 fixedly connected to the other end of the swing slide arm 403 is provided with a plurality of spray heads 405, the spray box 404 is sealed and connected to the mounting hole of the middle round tube 300 through a telescopic hose 406, and the telescopic hose 406 is connected to the liquid chamber 602; a movable shaft 407 rotatably connected to the swing slide arm 403 is slidably matched with the swing In the side slide grooves on both sides of the sliding sleeve 402, one end of the movable shaft 407 slides in the annular slide groove 408 of the disc seat 401, and the other end of the movable shaft 407 is rotatably connected to one end of the swing link 409, and the other end of the swing link 409 is rotatably connected to the eccentric position of the rotating wheel 410, and the rotating wheel 410 is rotatably connected to the disc seat 401 through the wheel axle; the rotating wheel 410 is meshed with the outer gear ring 201 fixed on the outer tube 200; a plurality of tension springs are fixedly connected between the swing slide arm 403 and the inner side surface of the slideway of the swing sleeve 402.

[0036] When the middle circular tube 300 drives the disc seat 401 to rotate, the disc seat 401 drives the multiple rotating wheels 410 to rotate and orbit. When the multiple rotating wheels 410 rotate and orbit, the contact position between the rotating wheels 410 and the outer gear ring 201 on the outer circular tube 200 is changed, so that the rotating wheels 410 rotate around the axis of the wheel shaft. When the rotating wheels 410 rotate, one end of the eccentric swing link 409 is driven to rotate and orbit, and the other end of the swing link 409 drives the movable shaft 407 to slide in a reciprocating displacement of a certain arc in the annular groove 408 of the disc seat 401, thereby driving The movable swing sleeve 402 performs a reciprocating swing motion at a certain angle with the axis of the hinge shaft as the center. When the swing sleeve 402 swings, the movable shaft 407 slides in the side slide grooves on both sides of the swing sleeve 402, and drives the swing slide arm 403 to slide in the slideway of the swing sleeve 402, so that the swing slide arm 403 continuously drives the spray box 404 and multiple spray heads 405 to swing, which can change the distance between the spray box 404 and the multiple spray heads 405 and the center of the disc seat 401, forming a spray coverage effect in different ranges, increasing the contact area with dust or dust, and improving the dust removal effect.

[0037] Embodiment 5 Please see attached Figure 1-10 The two arc-shaped guards 411 are fixedly connected to the disc seat 401, and the annular cover 702 is rotatably fitted on the inner arc surfaces of the two arc-shaped guards 411. The two arc-shaped guards 411 are fixedly connected to the two ends of the right-angle scraper 412, and the guide column 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 the two arc-shaped guards 411 are both located below the guide column 413. When the disc seat 401 rotates, it can drive the two arc-shaped guard frames 411 to rotate and orbit. As the disc seat 401 rotates, the arc-shaped guard frames 411 drive the right-angle scraper 412 to scrape and clean the circular filter plate 705, thereby realizing 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 to provide positioning and guiding functions, ensuring that the right-angle scraper is accurately positioned during the cleaning process to avoid deviation or bending; the dust scraping and cleaning function is integrated into the existing rotating structure without adding additional complexity, keeping the system structure compact and simple; the automatic cleaning function reduces system failures caused by filter plate blockage, thereby improving the reliability and stability of the entire dust removal system.

[0038] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

[0039] The present invention is not limited to the structures which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A high-angle working surface pressure reduction and dust removal system, characterized in that: include: A support base (100) is provided, wherein a transversely mounted outer circular tube (200) is fixedly connected to the support base (100), the outer circular tube (200) is rotatably engaged with the middle circular tube (300), and the two ends of the middle circular tube (300) extending outside the outer circular tube (200) are respectively connected to a spray dust removal mechanism (400) and a driving mechanism (500), and the driving mechanism (500) is fixedly connected to the support base (100); the middle circular tube (300) is sleeved on the outside of the inner circular tube (600), and two annular plates (601) fixed on the inner circular tube (600) are respectively sealed and rotatably engaged with two sides of the inner wall of the middle circular tube (300), and a liquid chamber (602) formed between the inner circular tube (600), the middle circular tube (300) and the two annular plates (601) is connected to the spray dust removal mechanism (400).

2. A high-angle working surface pressure reduction and dust removal system according to claim 1, characterized in that: The driving mechanism (500) comprises: a driving motor fixedly connected to the support base (100); a driving wheel keyed to the motor shaft of the driving motor; and a driven wheel connected to a driven wheel fixed to the middle circular tube (300) via a belt drive.

3. The high-angle working surface pressure reduction and dust removal system according to claim 1 is characterized in that: The inner circular tube (600) is fixedly connected to the support base (100) via a bracket; one end of the inner circular tube (600) away from the spray dust removal mechanism (400) is connected to the air suction port of the negative pressure fan, and the air outlet of the fan is connected to the dust collector via a pipeline.

4. A high-angle working surface pressure reduction and dust removal system according to claim 3, characterized in that: Also includes: A dust removal and primary filtering mechanism (700); the dust removal and primary filtering mechanism (700) comprises: a conical air collecting hood (701) fixedly connected to one end of the inner tube (600) away from the negative pressure fan, the other end of the conical air collecting hood (701) fixedly connected to the annular hood (702), a plurality of inner protrusions (703) fixed to the inner wall of the annular hood (702), each inner protrusion (703) being slidably connected to a sliding column (704), a convex edge being provided at one end of the plurality of sliding columns (704) close to the conical air collecting hood (701), and the other ends of the plurality of sliding columns (704) being connected to a circular filter plate (705) slidably fitted in the annular hood (702); a compression spring (706) being sleeved on the column of the sliding column (704) located between the circular filter plate (705) and the inner protrusion (703).

5. A high-angle working surface pressure reduction and dust removal system according to claim 4, characterized in that: The spray dust removal mechanism (400) comprises: a disc seat (401) fixedly connected to one end of the middle circular tube (300), four spray assemblies evenly connected around the side surface of the disc seat (401) close to the middle circular tube (300), and the four spray assemblies are all connected to the liquid chamber (602).

6. A high-angle working surface pressure reduction and dust removal system according to claim 5, characterized in that: The spray assembly comprises: a swing sleeve (402), one end of the swing sleeve (402) being rotatably connected to the disc seat (401) via a hinge shaft, the other end of the swing sleeve (402) being slidably connected to one end of a swing arm (403) in a slideway, the other end of the swing arm (403) being fixedly connected to a spray box (404) provided with a plurality of spray heads (405), the spray box (404) being sealedly connected to the mounting hole of the middle circular tube (300) via a telescopic hose (406), the telescopic hose (406) being in communication with the liquid chamber (602); 03) is slidably engaged in the side grooves on both sides of the swing sleeve (402), one end of the movable shaft (407) is slidably engaged 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 link (409), the other end of the swing link (409) is rotatably connected to the eccentric position of the rotating wheel (410), and the rotating wheel (410) is rotatably connected to the disc seat (401) through the wheel axle; the rotating wheel (410) is meshed with the outer gear ring (201) fixed on the outer cylindrical tube (200).

7. A high-angle working surface pressure reduction and dust removal system according to claim 6, characterized in that: A plurality of tension springs are fixedly connected between the swing slide arm (403) and the inner side surface of the slideway of the swing slide sleeve (402).

8. The high-angle working surface pressure reduction and dust removal system according to claim 6 is characterized in that: The disc seat (401) is fixedly connected to two arc-shaped guard frames (411), and the annular cover (702) is rotatably engaged with the inner arc surfaces of the two arc-shaped guard frames (411).

9. A high-angle working surface pressure reduction and dust removal system according to claim 8, characterized in that: The two arc-shaped guard frames (411) are fixedly connected to the two ends of the right-angle scraper (412); a guide column (413) fixed in the middle of the right-angle scraper (412) is slidably fitted in a 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 the two arc-shaped guard frames (411) are both located below the guide column (413).

10. The high-angle working surface pressure reduction and dust removal system 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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