Onboard dust moving device of coal mining machine

Abstract

The invention discloses an onboard dust moving device of a coal mining machine, the onboard dust moving device is arranged on the coal mining machine, the onboard dust moving device comprises a suction section, a noise reduction section I, a fan section, a noise reduction section II and a discharge section which are connected in sequence, and the suction section, the noise reduction section I, the fan section, the noise reduction section II and the discharge section are detachably connected; the first silencing section and the second silencing section are symmetrically arranged relative to the fan section, the suction section is close to the front cutting roller, and the discharge section is close to the rear cutting roller. The dust removal device is reasonable in design, the air inlet of the airborne dust removal device is close to the cutting roller of the coal mining machine, dust generated by coal seam cutting is sucked into a pipeline of the dust removal device to the maximum extent and discharged to the other end of the coal mining machine through negative pressure generated by the fan, diffusion of the dust in a working area of production operators is reduced, and the production efficiency is improved. Dust is prevented from interfering the sight of production operators, and the harm of dust to the bodies of the production operators is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal shearers, and in particular relates to an onboard dust removal device for coal shearers. Background Art

[0002] Coal mines currently have ventilation systems that provide fresh air to meet the breathing needs of underground workers and ensure their safety. The ventilation systems also dilute and discharge harmful gases (such as methane and carbon dioxide) and dust in the mines, preventing accidents such as gas explosions and coal dust explosions, thereby ensuring safe production.

[0003] However, when a shearer is cutting coal seams, a large amount of dust is generated and accumulates in the operator's work area. This dust cannot be discharged in time, which interferes with the operator's vision and creates a safety hazard. It also constantly invades the operator's respiratory system and endangers their health.

[0004] Therefore, there is currently a lack of an airborne dust removal device for coal mining machines with a simple structure and reasonable design. The airborne dust removal device is set on the coal mining machine, and the air inlet of the airborne dust removal device is close to a cutting drum of the coal mining machine. The negative pressure generated by the fan is used to absorb the dust generated by coal seam cutting into the dust removal device pipeline to the maximum extent and discharge it to the other cutting drum of the coal mining machine, thereby reducing the spread of dust in the working area of ​​the production operator, avoiding dust interfering with the production operator's line of sight, and reducing the physical harm of dust to the production operator. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide an airborne dust removal device for a coal mining machine. The airborne dust removal device has a simple structure and a reasonable design. The airborne dust removal device is arranged on the coal mining machine, and the air inlet of the airborne dust removal device is close to the cutting drum of the coal mining machine. The negative pressure generated by the fan is used to absorb the dust generated by coal seam cutting into the dust removal device pipeline to the maximum extent and discharge it to the other end of the coal mining machine, thereby reducing the spread of dust in the working area of ​​the production operator, avoiding dust interfering with the line of sight of the production operator, and reducing the physical harm of dust to the production operator.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an airborne dust removing device for a coal mining machine, characterized in that: the airborne dust removing device is arranged on the coal mining machine, and the airborne dust removing device includes a suction section, a silencer section one, a fan section, a silencer section two and a discharge section connected in sequence, and the suction section, the silencer section one, the fan section, the silencer section two and the discharge section can be detachably connected, the silencer section one and the silencer section two are symmetrically arranged about the fan section, the suction section is close to the front cutting drum, and the discharge section is close to the rear cutting drum.

[0007] The above-mentioned coal mining machine-mounted dust removal device is characterized in that: the suction section includes an inlet trapezoidal section, a suction transition arc section, a suction extension section and a suction change section connected in sequence, the inlet trapezoidal section is a trapezoidal portion, and the suction port of the inlet trapezoidal section is provided with an inlet filter arranged obliquely; The suction extension section includes an integrally formed front rectangular portion and a rear arc-shaped extension section, a front opening section is provided on the side panel connected to the front rectangular portion and the rear arc-shaped extension section, the outlet of the suction transition arc section is connected to one front opening section, and a rectangular opening and closing cover plate is provided at the other front opening section; The suction changing section is connected between the suction extending section and the muffler section 1.

[0008] The above-mentioned shearer-mounted dust removal device is characterized in that: the inlet trapezoidal section and the suction transition arc section are installed on the coal wall side of the shearer, and the suction port of the inlet trapezoidal section is close to the front cutting drum; The suction extension section, silencer section 1, fan section, silencer section 2 and discharge section are all located on the top of the coal mining machine, and the silencer section 1, fan section, silencer section 2 and discharge section are coaxially arranged.

[0009] The above-mentioned coal mining machine-mounted dust removal device is characterized in that: the bottom ends of the first and second muffler sections are provided with mounting assemblies, the mounting assemblies comprising a bottom horizontal plate, movable plates swingably provided at both ends of the bottom horizontal plate, and a fixed plate provided on the top of the coal mining machine, the movable plates and the fixed plate being connected by bolts; Two sleeve parts are provided at both ends of the bottom of the bottom horizontal plate, a central axis is provided in the two sleeve parts, a connecting sleeve is provided on the movable plate, the connecting sleeve is sleeved on the central axis and is located between the two sleeve parts, and the movable plate can swing around the central axis through the connecting sleeve; A connecting plate is extended from the bottom of the connecting flanges at both ends of the muffler section 1 and the muffler section 2, and the connecting plate and the bottom horizontal plate are connected by bolts.

[0010] The above-mentioned coal mining machine-mounted dust removal device is characterized in that: the discharge section includes a discharge straight section, a discharge gradient section connected to the discharge straight section, and an outlet filter provided at the outlet of the discharge gradient section, and the discharge straight section is connected to the second muffler section; An external connection ear is provided on the outer side wall of the discharge straight cylinder section close to the discharge gradient section, and an L-shaped plate is provided on the external connection ear.

[0011] The above-mentioned coal mining machine-mounted dust removal device is characterized in that: the fan section includes a fan housing, an impeller housing and a transition housing connected in sequence, the fan housing is detachably provided with a cover plate, an explosion-proof motor is provided in the fan housing, an impeller is provided in the impeller housing, and the output shaft of the explosion-proof motor is drivingly connected to the impeller; The inner wall of the transition shell is provided with a plurality of fixed blades arranged along the circumferential direction. A cylinder is coaxially arranged inside the transition shell. The fixed blades are circumferentially fixedly connected to the outer wall of the cylinder. The cylinder is integrally connected with a cone, and the cylinder is arranged close to the impeller.

[0012] The above-mentioned coal mining machine-mounted dust removal device is characterized in that: the silencer section 1, the fan section, the silencer section 2 and the discharge section are provided with hanging rings, and the silencer section 1, the fan section and the silencer section 2 are provided with cable hooks.

[0013] The above-mentioned coal mining machine-mounted dust removal device is characterized in that: the suction section includes an inlet straight section, an inclined section and a cross-section changing section connected in sequence, the inlet straight section is a trapezoidal portion, and the suction port of the inlet trapezoidal section is provided with an inclined inlet filter, the lower end of the inclined section is connected to the inlet straight section, the high end of the inclined section is connected to the cross-section changing section, the inlet of the cross-section changing section is rectangular, the outlet of the cross-section changing section is circular, and the cross-section changing section is connected to the silencer section.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The shearer-mounted dust removal device used in the present invention has a simple structure, a reasonable design and a small size.

[0015] 2. The present invention sets the suction section so that the inlet of the suction section is installed on the coal wall side of the coal mining machine, which not only meets the installation axis requirements of the subsequent silencer section 1, fan section, silencer section 2 and discharge section, but also enables the internal air to move, forming a certain airflow that can be effectively guided and transferred, realizing the side-entry and top-suction structure.

[0016] 3. The fan section is provided in the present invention so that the negative pressure generated by the rotation of the fan can be used to absorb the dust generated by the coal seam cutting into the dust removal device pipeline to the maximum extent and discharge it to the other end of the coal mining machine; and silencer section 1 and silencer section 2 are provided to assist in noise reduction; secondly, by symmetrically arranging silencer section 1 and silencer section 2, and the suction section, silencer section 1, fan section, silencer section 2 and discharge section are detachably connected, thereby meeting the adjustment of the positions of the two ends of the suction section and the discharge section, and the 180° adjustment of the fan section, it can meet the dust transfer from the front cutting drum to the rear cutting drum, and the dust transfer from the rear cutting drum to the front cutting drum, with good adaptability, so that the dust generated by the coal seam cutting can be discharged to one end of the coal mining machine to the maximum extent, thereby reducing the spread of dust in the working area of ​​the production operator.

[0017] To sum up, the present invention is reasonably designed. The airborne dust removal device is arranged on the coal mining machine. The air inlet of the airborne dust removal device is close to the cutting drum of the coal mining machine. The negative pressure generated by the fan is used to absorb the dust generated by coal seam cutting into the dust removal device pipeline to the maximum extent and discharge it to the other end of the coal mining machine, thereby reducing the spread of dust in the working area of ​​the production operator, avoiding dust interfering with the production operator's line of sight, and reducing the physical harm of dust to the production operator.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram showing the use status of the coal mining machine-mounted dust removal device of the present invention.

[0020] Figure 2 The present invention is a coal mining machine onboard dust removal device relative Figure 1 Schematic diagram of the structure flipped 90 degrees.

[0021] Figure 3 This is a schematic diagram of the first structure of the suction section of the onboard dust removal device of the coal mining machine of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure inside the fan section of the coal mining machine's onboard dust removal device of the present invention.

[0023] Figure 5 A schematic structural diagram of the installation assembly of the shearer's onboard dust removal device according to the present invention.

[0024] Figure 6 A second structural schematic diagram of the suction section of the coal mining machine of the present invention.

[0025] Description of the accompanying drawings: 1—suction section; 1-1—inlet trapezoidal section; 1-2—suction transition arc section; 1-3—inhalation extension; 1-31—front rectangular portion; 1-32—rear arc-shaped extension; 1-33—Rectangular opening and closing cover; 1-4—Suction change section; 1-5—Inlet filter; 2—Silencer section 1; 3—Fan section; 3-1—Fan casing; 3-2—cover plate; 3-3—impeller housing; 3-4—transition housing; 3-5—carrying plate; 3-6—explosion-proof motor; 3-7—impeller; 3-8—fixed blades; 3-9—cylinder; 3-A—cone; 4—Silencer section 2; 5—Discharge section; 5-1—Discharge straight tube section; 5-2—discharge gradient section; 5-3—outlet filter; 5-4—external connection ear; 5-5—L-shaped plate; 5-6—reinforced triangular plate; 7—installation assembly; 7-1—bottom horizontal plate; 7-11—sleeve portion; 7-12—center axis; 7-2—Fixed plate; 7-3—Joint plate; 7-31—Connecting sleeve; 7-4—Connecting plate; 8—Lifting ring; 9—Cable hook; 10-1—Entrance straight section; 10-2—Inclined section; 10-3—Cross-section changing section; 10-4—Entering the filter screen; 11—Front cutting drum; 12—Rear cutting drum; 13—coal mining machine; 14—mounting plate; 15—roof plate. DETAILED DESCRIPTION

[0026] like Figures 1 to 6 As shown, the airborne dust removing device 10 of the present invention is arranged on a coal mining machine 13, and the airborne dust removing device includes a suction section 1, a silencer section 1 2, a fan section 3, a silencer section 2 4 and a discharge section 5 connected in sequence, and the suction section 1, the silencer section 1 2, the fan section 3, the silencer section 2 4 and the discharge section 5 can be detachably connected, and the silencer section 1 2 and the silencer section 2 4 are symmetrically arranged about the fan section 3, the suction section 1 is close to the front cutting drum 11, and the discharge section 5 is close to the rear cutting drum 12.

[0027] In this embodiment, in actual use, the suction section 1 includes an inlet trapezoidal section 1-1, an inlet transition arc section 1-2, an inlet extension section 1-3, and an inlet change section 1-4 connected in sequence. The inlet trapezoidal section 1-1 is a trapezoidal portion, and the suction port of the inlet trapezoidal section 1-1 is provided with an inlet filter 1-5 arranged obliquely. The suction extension section 1-3 includes an integrally formed front rectangular portion 1-31 and a rear arc-shaped extension portion 1-32. A front opening portion is provided on the side panel where the front rectangular portion 1-31 and the rear arc-shaped extension portion 1-32 are connected. The outlet of the suction transition arc section 1-2 is connected to one front opening portion, and a rectangular opening and closing cover plate 1-33 is provided at the other front opening portion. The suction change section 1-4 is connected between the suction extension section 1-3 and the silencer section 2.

[0028] In this embodiment, in actual use, the inlet trapezoidal section 1-1 and the suction transition arc section 1-2 are installed on the coal wall side of the coal mining machine 13, and the suction port of the inlet trapezoidal section 1-1 is close to the front cutting drum 11; The suction extension section 1-3, silencer section 1 2, fan section 3, silencer section 2 4 and discharge section 5 are all located at the top of the coal mining machine 13, and the silencer section 1 2, fan section 3, silencer section 2 4 and discharge section 5 are coaxially arranged.

[0029] In this embodiment, in actual use, mounting assemblies 7 are provided at both ends of the bottom of the muffler section 1 2 and the muffler section 2 4. The mounting assembly 7 includes a bottom horizontal plate 7-1, a movable plate 7-3 swingably provided at both ends of the bottom horizontal plate 7-1, and a fixed plate 7-2 provided on the top of the coal mining machine 13. The movable plate 7-3 and the fixed plate 7-2 are connected by bolts. Two sleeve portions 7-11 are provided at both ends of the bottom of the bottom horizontal plate 7-1, and a central axis 7-12 is provided in the two sleeve portions 7-11. A connecting sleeve 7-31 is provided on the movable plate 7-3. The connecting sleeve 7-31 is sleeved on the central axis 7-12 and is located between the two sleeve portions 7-11. The movable plate 7-3 can swing around the central axis 7-12 through the connecting sleeve 7-31. A connecting plate 7-4 is provided at the bottom of the connecting flanges at both ends of the muffler section 1 2 and the muffler section 2 4, and the connecting plate 7-4 is connected to the bottom horizontal plate 7-1 by bolts.

[0030] In this embodiment, in actual use, the discharge section 5 includes a discharge straight section 5-1, a discharge gradient section 5-2 connected to the discharge straight section 5-1, and an outlet filter 5-3 provided at the outlet of the discharge gradient section 5-2. The discharge straight section 5-1 is connected to the muffler section 2 4. An external connection ear 5-4 is provided on the outer side wall of the discharge straight cylinder section 5-1 close to the discharge gradient section 5-2, and an L-shaped plate 5-5 is provided on the external connection ear 5-4.

[0031] In this embodiment, in actual use, the fan section 3 includes a fan casing 3-1, an impeller casing 3-3 and a transition casing 3-4 connected in sequence. The fan casing 3-1 is detachably provided with a cover plate 3-2. An explosion-proof motor 3-6 is provided in the fan casing 3-1. An impeller 3-7 is provided in the impeller casing 3-3. The output shaft of the explosion-proof motor 3-6 is transmission-connected to the impeller 3-7. The inner wall of the transition shell 3-4 is provided with a plurality of fixed blades 3-8 arranged along the circumferential direction, and a cylinder 3-9 is coaxially arranged inside the transition shell 3-4. The fixed blades 3-8 are circumferentially fixedly connected to the outer wall of the cylinder 3-9, and the cylinder 3-9 is integrally connected with a cone 3-A. The cylinder 3-9 is arranged close to the impeller 3-7.

[0032] In this embodiment, in actual use, the silencer section 1 2 , the fan section 3 , the silencer section 2 4 and the discharge section 5 are provided with a hanging ring 8 , and the silencer section 1 2 , the fan section 3 and the silencer section 2 4 are provided with a cable hook 9 .

[0033] In this embodiment, in actual use, the suction section 1 includes an inlet straight section 10-1, an inclined section 10-2 and a cross-section change section 10-3 connected in sequence, the inlet straight section 10-1 is a trapezoidal portion, and the suction port of the inlet trapezoidal section 1-1 is provided with an inclined inlet filter 10-4, the lower end of the inclined section 10-2 is connected to the inlet straight section 10-1, and the high end of the inclined section 10-2 is connected to the cross-section change section 10-3, the inlet of the cross-section change section 10-3 is rectangular, the outlet of the cross-section change section 10-3 is circular, and the cross-section change section 10-3 is connected to the silencer section 2.

[0034] In this embodiment, in actual use, the width of one side of the inlet trapezoidal section 1-1 is smaller than the width of the other side of the inlet trapezoidal section 1-1, so that the suction port of the inlet trapezoidal section 1-1 is an inclined surface, thereby improving the suction and dust removal effect.

[0035] In this embodiment, in actual use, two symmetrically arranged front openings are provided on the side panel connecting the front rectangular portion 1-31 and the rear arc-shaped extension portion 1-32, so as to adapt the suction section 1 to be installed at both ends of the coal mining machine, thereby adapting to the operation of the left cutting drum or the right cutting drum of the coal mining machine.

[0036] In this embodiment, in actual use, the front rectangular portion 1-31 and the rear arc-shaped extension portion 1-32 are provided so that the front rectangular portion 1-31 and the suction transition arc segment 1-2 can be installed at the same height, thereby meeting the installation requirements of the suction transition arc segment 1-2; the rear arc-shaped extension portion 1-32 is provided to extend the front rectangular portion 1-31, which can not only meet the installation axis requirements of the subsequent silencer section 1 2, fan section 3, silencer section 2 4 and discharge section, but also enable the internal air to move, forming a certain airflow that can be effectively guided.

[0037] In this embodiment, in actual use, the outlet of the suction extension section 1-3 is a rectangular portion, and the connection between the rear side surface and the front section of the rear arc-shaped extension section 1-32 is arc-shaped, so that when the internal airflow passes through, the resistance is reduced and the flow rate is increased.

[0038] In this embodiment, in actual use, the inlet of the suction change section 1-4 is rectangular, and the outlet of the suction change section 1-4 is circular, so that the rectangular outlet of the suction section 1 and the circular inlet of the silencer section 2 are connected.

[0039] In this embodiment, in actual use, the suction transition arc section 1-2 is provided to change the flow direction so that the air enters from the side and is discharged from the top.

[0040] In this embodiment, in actual use, the muffler section 1 2 and the muffler section 2 4 are composed of a punched inner tube, a sound-absorbing cotton layer and an outer tube shell from the inside to the outside.

[0041] In this embodiment, in actual use, the length of the bottom horizontal plate 7-1 is greater than the diameters of the silencer section 1 2 and the silencer section 2 4, one connecting plate 7-4 is connected to the end of the bottom horizontal plate 7-1, and the other connecting plate 7-4 is connected to the middle of the bottom horizontal plate 7-1.

[0042] In this embodiment, in actual use, the bottom horizontal plate 7-1 is provided with waist-shaped holes for connection with the connecting plate 7-4, which improves adaptability and facilitates actual assembly.

[0043] In this embodiment, in actual use, the installation component 7 is used to install the silencer section 1 2 and the silencer section 2 4 on the top of the coal mining machine 13. In this way, the silencer section 1 2 and the silencer section 2 4 are installed and fixed, so that the fan section 3 is installed on the top of the coal mining machine 13.

[0044] In this embodiment, in actual use, the joint plate 7-3 is set to swing around the central axis 7-12 through the connecting sleeve 7-31. This is to enable the joint plate 7-3 to adapt to the fixed plate 7-2 on the top of the coal mining machine 13, so that the joint plate 7-3 and the fixed plate 7-2 can be better connected by bolts.

[0045] In this embodiment, in actual use, the bottom of the connecting flanges at both ends of the silencer section 1 2 and the silencer section 2 4 extends out of the outer walls of the silencer section 1 2 and the silencer section 2 4, and the bottom of the connecting flange is horizontal, so it is convenient to add a connecting plate 7-4 to the horizontal bottom.

[0046] In this embodiment, in actual use, the discharge straight section 5-1 and the discharge gradient section 5-2 are provided to cooperate with each other. The discharge straight section 5-1 can reduce the vortex and pulsation of the fluid at the outlet, forming a relatively uniform and stable state, thereby improving the efficiency and stability of dust removal. The purpose of setting the discharge gradient section 5-2 is to effectively slow down the air flow speed, thereby reducing the friction resistance and turbulence resistance generated by the air flow in the pipeline, significantly improving the ventilation efficiency; it also helps to reduce the turbulence and vortex phenomena in the air flow process, thereby achieving the effect of reducing noise.

[0047] In this embodiment, in actual use, the vertical plate of the L-shaped plate 5-5 is connected to the fixed plate 7-2 on the top of the coal mining machine 13, and a reinforced triangular plate 5-6 is provided inside the L-shaped plate 5-5.

[0048] In this embodiment, in actual use, a vertically arranged bearing plate 3-5 is provided on the rear side wall of the fan casing 3-1, the explosion-proof motor 3-6 is installed on the bearing plate 3-5, and the output shaft of the explosion-proof motor 3-6 is connected to the impeller 3-7 through a key transmission.

[0049] In this embodiment, during actual use, the explosion-proof motor 3-6 and the impeller 3-7 are provided so that the explosion-proof motor 3-6 drives the impeller 3-7 to rotate, and the rotation of the impeller 3-7 generates negative pressure.

[0050] In this embodiment, in actual use, fixed blades 3-8 are provided to be connected between the outer wall of the cylinder 3-9 and the inner wall of the transition shell 3-4, so that a channel is formed between the outer wall of the cylinder 3-9 and the inner wall of the transition shell 3-4. When the airflow sucked by the impeller 3-7 rotates and passes through the channel, the airflow is divided into multiple independent flow channels under the action of the fixed blades 3-8, forcing the airflow to pass evenly, reducing local eddy currents and impact losses; and reducing the flow velocity to ensure axial stable flow and reduce noise.

[0051] In this embodiment, in actual use, the cylinder 3-9 is integrally connected to the cone 3-A, and a gap is formed between the outer wall of the cone 3-A and the inner wall of the transition shell 3-4; the cone 3-A is provided to guide the central low-energy fluid to mix with the high-energy mainstream, balance the pressure distribution, suppress the airflow separation, and stabilize the flow field.

[0052] In this embodiment, in actual use, a lifting ring 8 is provided to facilitate the lifting of the silencer section 1 2, the fan section 3, the silencer section 2 4 and the discharge section 5; a cable hook 9 is provided to facilitate the installation of the cable of the explosion-proof motor 3-6 passing through the fan casing 3-1.

[0053] In this embodiment, during actual use, the explosion-proof motor 3-6 has a dustproof function, which effectively prevents dust and moisture from entering the interior of the motor. Reference may be made to the YBK3-132S2-2 explosion-proof motor.

[0054] In this embodiment, in actual use, when the suction section 1 includes an inlet straight section 10-1, an inclined section 10-2 and a cross-section change section 10-3 connected in sequence, the suction section 1 and the silencer section 1 2, the fan section 3, the silencer section 2 4 and the discharge section 5 are all installed on the top of the coal mining machine 13.

[0055] In this embodiment, in actual use, mounting plates 14 are provided at the bottom of the inlet straight section 10-1, the bottoms of both ends of the silencer section 1 2 and the silencer section 2 4, and the bottom of the discharge straight section 5-1 in the discharge section 5, so that the mounting plate 11 is connected to the top plate 15 fixed on the top of the coal mining machine 13 to achieve installation.

[0056] To sum up, the present invention is reasonably designed. The airborne dust removal device is arranged on the coal mining machine. The air inlet of the airborne dust removal device is close to the cutting drum of the coal mining machine. The negative pressure generated by the fan is used to absorb the dust generated by coal seam cutting into the dust removal device pipeline to the maximum extent and discharge it to the other end of the coal mining machine, thereby reducing the spread of dust in the working area of ​​the production operator, avoiding dust interfering with the production operator's line of sight, and reducing the physical harm of dust to the production operator.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the compensation scope of the technical solution of the present invention.

Claims

1. A coal mining machine-mounted dust removal device, characterized in that: The airborne dust removal device (10) is arranged on a coal mining machine (13), and comprises a suction section (1), a muffler section 1 (2), a fan section (3), a muffler section 2 (4) and a discharge section (5) which are connected in sequence. The suction section (1), the muffler section 1 (2), the fan section (3), the muffler section 2 (4) and the discharge section (5) are all detachably connected. The muffler section 1 (2) and the muffler section 2 (4) are symmetrically arranged with respect to the fan section (3). The suction section (1) is close to the front cutting drum (11), and the discharge section (5) is close to the rear cutting drum (12).

2. A coal mining machine-mounted dust removal device according to claim 1, characterized in that: The suction section (1) comprises an inlet trapezoidal section (1-1), an inlet transition arc section (1-2), an inlet extension section (1-3) and an inlet change section (1-4) connected in sequence, the inlet trapezoidal section (1-1) being a trapezoidal portion, and the inlet of the inlet trapezoidal section (1-1) being provided with an inlet filter screen (1-5) arranged obliquely; The suction extension section (1-3) comprises an integrally formed front rectangular portion (1-31) and a rear arc-shaped extension portion (1-32); a front opening portion is provided on a side panel connected to the front rectangular portion (1-31) and the rear arc-shaped extension portion (1-32); the outlet of the suction transition arc section (1-2) is connected to one front opening portion, and a rectangular opening and closing cover plate (1-33) is provided at the other front opening portion; The suction change section (1-4) is connected between the suction extension section (1-3) and the muffler section one (2).

3. A coal mining machine-mounted dust removal device according to claim 2, characterized in that: The inlet trapezoidal section (1-1) and the suction transition arc section (1-2) are installed on the coal wall side of the coal mining machine (13), and the suction port of the inlet trapezoidal section (1-1) is close to the front cutting drum (11); The suction extension section (1-3), the muffler section 1 (2), the fan section (3), the muffler section 2 (4) and the discharge section (5) are all located on the top of the coal mining machine (13), and the muffler section 1 (2), the fan section (3), the muffler section 2 (4) and the discharge section (5) are coaxially arranged.

4. The coal mining machine-mounted dust removal device according to claim 1, characterized in that: The two ends of the bottom of the muffler section 1 (2) and the muffler section 2 (4) are provided with mounting components (7), the mounting components (7) comprising a bottom horizontal plate (7-1), a movable plate (7-3) swingably arranged at both ends of the bottom horizontal plate (7-1), and a fixed plate (7-2) arranged on the top of the coal mining machine (13), the movable plate (7-3) and the fixed plate (7-2) being connected by bolts; Two sleeve portions (7-11) are provided at both ends of the bottom of the bottom horizontal plate (7-1), a central axis (7-12) is provided in the two sleeve portions (7-11), a connecting sleeve (7-31) is provided on the movable plate (7-3), the connecting sleeve (7-31) is sleeved on the central axis (7-12) and is located between the two sleeve portions (7-11), and the movable plate (7-3) can swing around the central axis (7-12) through the connecting sleeve (7-31); A connecting plate (7-4) is provided at the bottom of the connecting flanges at both ends of the muffler section 1 (2) and the muffler section 2 (4), and the connecting plate (7-4) and the bottom horizontal plate (7-1) are connected by bolts.

5. The coal mining machine-mounted dust removal device according to claim 1, characterized in that: The discharge section (5) comprises a discharge straight section (5-1), a discharge gradient section (5-2) connected to the discharge straight section (5-1), and an outlet filter (5-3) arranged at the outlet of the discharge gradient section (5-2); the discharge straight section (5-1) is connected to the second muffler section (4); An external connection ear (5-4) is provided on the outer side wall of the discharge straight cylinder section (5-1) close to the discharge gradient section (5-2), and an L-shaped plate (5-5) is provided on the external connection ear (5-4).

6. The coal mining machine-mounted dust removal device according to claim 2, characterized in that: The fan section (3) comprises a fan casing (3-1), an impeller casing (3-3) and a transition casing (3-4) connected in sequence; a cover plate (3-2) is detachably provided on the fan casing (3-1); an explosion-proof motor (3-6) is provided in the fan casing (3-1); an impeller (3-7) is provided in the impeller casing (3-3); and an output shaft of the explosion-proof motor (3-6) is drivingly connected to the impeller (3-7); The inner side wall of the transition shell (3-4) is provided with a plurality of fixed blades (3-8) arranged along the circumferential direction; a cylinder (3-9) is coaxially arranged inside the transition shell (3-4); the fixed blades (3-8) are circumferentially fixedly connected to the outer side wall of the cylinder (3-9); the cylinder (3-9) is integrally connected to a cone (3-A); and the cylinder (3-9) is arranged close to the impeller (3-7).

7. A method for cutting and mining thin coal seams using the device according to claim 1, characterized in that: The silencer section 1 (2), the fan section (3), the silencer section 2 (4) and the discharge section (5) are provided with hanging rings (8), and the silencer section 1 (2), the fan section (3) and the silencer section 2 (4) are provided with cable hooks (9).

8. The coal mining machine-mounted dust removal device according to claim 1, characterized in that: The suction section (1) comprises an inlet straight section (10-1), an inclined section (10-2) and a cross-section changing section (10-3) connected in sequence, the inlet straight section (10-1) being a trapezoidal portion, the suction port of the inlet trapezoidal section (1-1) being provided with an inclined inlet filter (10-4), the lower end of the inclined section (10-2) being connected to the inlet straight section (10-1), the upper end of the inclined section (10-2) being connected to the cross-section changing section (10-3), the inlet of the cross-section changing section (10-3) being rectangular, the outlet of the cross-section changing section (10-3) being circular, and the cross-section changing section (10-3) being connected to the first muffler section (2).

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