Spiral cutting device, thin seam mining machine and thin seam mining system

Abstract

The invention discloses a spiral cutting device, a thin seam mining machine and a thin seam mining system. The spiral cutting device comprises a roller, a plurality of spiral blades, a plurality of first cutting teeth and a plurality of second cutting teeth. The spiral blades are spirally wound on the peripheral surface of the roller, the multiple spiral blades are arranged in the circumferential direction of the roller at intervals, and the lead angles of the spiral blades are gradually increased in the direction away from the first end of the roller; the plurality of first cutting teeth are arranged on the end surface of the first end of the roller at intervals; and a plurality of second cutting teeth are arranged on each spiral blade at intervals. And along with the increase of the lead angle, the speed of discharging the coal briquettes from the intervals among the spiral blades is gradually increased, and the axial speed of discharging the coal briquettes is improved, so that the coal briquette conveying efficiency of the cutting device is improved, the coal mining speed is improved, and the problem that the cutting operation is influenced by the blockage of the coal briquettes is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine mechanical equipment, and in particular relates to a spiral cutting device, a thin coal seam coal mining machine and a thin coal seam coal mining system. Background Art

[0002] Thin coal seams refer to coal seams with a thickness of 1.0-1.3m, accounting for 18% of the total coal reserves. The traditional methods of mining thin coal seams are blasting and general mining, which are inefficient and unsafe. In addition, the more common thin coal seam mining technologies include coal plowing machine mining technology and comprehensive mechanized coal mining technology, but the coal plowing machine has the disadvantages of low cutting hardness and poor efficiency. The related technology has a spiral cutting device for thin coal seam coal mining machines, but this type of spiral cutting device has the problem of easy clogging by coal blocks. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a spiral cutting device.

[0004] An embodiment of the present invention further provides a thin coal seam mining machine.

[0005] An embodiment of the present invention further provides a thin coal seam mining system.

[0006] The spiral cutting device of an embodiment of the present invention includes a drum, the drum having a first end and a second end opposite to each other in the axial direction thereof; a plurality of spiral blades, the spiral blades being spirally wound around the outer circumferential surface of the drum, the plurality of spiral blades being spaced apart in the circumferential direction of the drum, and the spiral angle of the spiral blades gradually increasing in the direction away from the first end of the drum; a plurality of first cutting teeth, the plurality of first cutting teeth being spaced apart on the end surface of the first end of the drum; and a plurality of second cutting teeth, a plurality of the second cutting teeth being spaced apart on each of the spiral blades.

[0007] According to the thin coal seam coal mining machine cutting device provided by the embodiment of the present invention, a plurality of spiral blades are spirally wound on the outer peripheral surface of the drum, and the spiral angle of the spiral blades gradually increases in the direction away from the first end of the drum. When the cutting device is in operation, the cut coal blocks will move along the gaps between the spiral blades to the side of the scraper conveyor. As the spiral angle increases, the speed at which the coal blocks are discharged from the gaps between the spiral blades gradually increases, and the axial speed of the coal blocks discharged increases, which is conducive to improving the coal block conveying efficiency of the cutting device, increasing the coal mining speed, and effectively solving the problem of coal block block blockage affecting the cutting operation.

[0008] In some embodiments, the helix angle of the spiral blade varies in the range of 3°-60°; and / or the helix angle of the end of the spiral blade adjacent to the first end of the drum is less than or equal to 15°.

[0009] In some embodiments, the number of the spiral blades is 2-5, and / or the central angle corresponding to each of the spiral blades is 40°-180°.

[0010] In some embodiments, there is an angle between the central axis of the first cutting tooth and the axial direction of the drum, and a plurality of first cutting teeth are rotationally symmetrical on the end surface of the first end of the drum.

[0011] In some embodiments, the central axis of the second cutting tooth is orthogonal to the central axis of the drum, and an angle is formed between the central axis of the second cutting tooth and the radial direction of the drum.

[0012] In some embodiments, the spiral cutting device also includes: an annular end plate, which is sleeved on the roller and connected to the outer circumferential surface of the roller, the annular end plate is located on the side of the first end of the roller adjacent to the plurality of spiral blades and is connected to the plurality of spiral blades, a plurality of through grooves are opened on the annular end plate, and the plurality of through grooves are arranged at intervals along the circumference of the annular end plate, and the plurality of intervals formed between the plurality of through grooves and the plurality of spiral blades are connected one-to-one in the axial direction of the roller.

[0013] In some embodiments, the spiral cutting device also includes a plurality of third cutting teeth, which are arranged on the outer peripheral surface of the annular end plate at circumferential intervals along the annular end plate; and / or the outer peripheral surface of the annular end plate is aligned with the outer end surface of the spiral blade in the radial direction of the drum.

[0014] A thin coal seam mining machine according to another embodiment of the present invention comprises: a frame; a cutting device, wherein the cutting device is a spiral cutting device according to any one of the above embodiments, the spiral cutting device is arranged on the frame, and the drum of the spiral cutting device is arranged horizontally; and a driving device, wherein the driving device is arranged on the frame, and the driving device is used to drive the drum of the spiral cutting device to rotate.

[0015] In some embodiments, there are two cutting devices, and the two cutting devices are arranged at intervals in the forward direction of the coal mining machine.

[0016] A thin coal seam mining system according to another embodiment of the present invention includes: a coal mining machine, which is a thin coal seam coal mining machine according to any of the above embodiments; and a traction system, which is connected to the coal mining machine and is used to tow the coal mining machine along a working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a spiral cutting device according to an embodiment of the present invention.

[0018] Figure 2 is another schematic diagram of the spiral cutting device according to an embodiment of the present invention.

[0019] Figure 3 1 is a top view of a spiral cutting device according to an embodiment of the present invention.

[0020] Figure 4 2. It is a bottom view of the spiral cutting device according to an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the change of the helical pitch angle of the spiral blade in the embodiment of the present invention.

[0022] Reference numerals:

[0023] Spiral cutting device 100,

[0024] Drum 1 , first end 11 , second end 12 , first cutting teeth 2 , second cutting teeth 3 , third cutting teeth 4 , fourth cutting teeth 5 , spiral blades 6 , annular end plate 7 , through groove 71 . DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] According to the following Figure 1-Figure 5 The spiral cutting device 100 according to the embodiment of the present invention is described. The spiral cutting device 100 includes a drum 1, a plurality of spiral blades 6, a plurality of first cutting teeth 2 and a plurality of second cutting teeth 3.

[0027] The drum 1 has a first end 11 and a second end 12 that are opposite in the axial direction thereof. During operation, the drum 1 is generally arranged horizontally, that is, the central axis of the drum 1 extends in the horizontal direction, and the central axis of the drum 1 is substantially perpendicular to the coal wall, wherein the first end 11 of the drum 1 faces the coal wall, that is, the first end 11 of the drum 1 is close to the coal wall, the second end 12 of the drum is away from the coal wall, and the first end 11 of the drum 1 moves in a direction close to the coal wall.

[0028] The spiral blade 6 is spirally wound on the outer circumferential surface of the drum 1, and a plurality of spiral blades 6 are spaced apart in the circumferential direction of the drum 1. The helical angle of the spiral blade 6 gradually increases in a direction away from the first end 11 of the drum 1.

[0029] The helix angle of the spiral blade 6 reflects the degree of inclination of the spiral blade 6 relative to the axial direction of the drum 1. Specifically, the helix angle of the spiral blade 6 is the angle between the tangent of the spiral blade 6 and the plane perpendicular to the axial direction of the drum 1 on the outer peripheral surface of the drum 1. The larger the helix angle of the spiral blade 6, the smaller the angle between the tangent of the spiral blade 6 and the axial direction of the drum 1, and the smaller the degree of inclination of the spiral blade 6 relative to the axial direction of the drum 1.

[0030] When the spiral cutting device 100 is operating, the cut coal blocks will move along the gaps between the spiral blades 6 and move to the scraper conveyor side. As the spiral angle increases, the speed at which the coal blocks are discharged from the gaps between the spiral blades 6 gradually increases, and the axial speed of the coal blocks discharged increases, which is beneficial to the spiral cutting device 100's transportation of the coal blocks.

[0031] A plurality of first cutting teeth 2 are arranged at intervals on the end face of the first end 11 of the drum 1, and the tooth tips of the first cutting teeth 2 are facing in a direction away from the end face of the first end 11 of the drum 1, that is, toward the coal wall, so that when the spiral cutting device 100 advances, the tooth tips of the first cutting teeth 2 contact the coal wall, and the drum 1 rotates, and the first cutting teeth 2 destroy the coal seam on the coal wall.

[0032] A plurality of second cutting teeth 3 are arranged at intervals on each spiral blade 6, that is, a plurality of second cutting teeth 3 are divided into a plurality of groups and are sequentially arranged on the surfaces of a plurality of spiral blades 6. The arrangement of the second cutting teeth 3 can cut the coal seam at more angles.

[0033] According to the thin coal seam coal mining machine cutting device provided by the embodiment of the present invention, a plurality of spiral blades are spirally wound on the outer peripheral surface of the drum, and the spiral angle of the spiral blades gradually increases in the direction away from the first end of the drum. When the cutting device is in operation, the cut coal blocks will move along the gaps between the spiral blades to the side of the scraper conveyor. As the spiral angle increases, the speed at which the coal blocks are discharged from the gaps between the spiral blades gradually increases, and the axial speed of the coal blocks discharged increases, which is conducive to improving the coal block conveying efficiency of the cutting device, increasing the coal mining speed, and effectively solving the problem of coal block block blockage affecting the cutting operation.

[0034] In addition, the minimum spiral angle of the spiral blade is close to the first end of the drum, which reduces the sudden change in the curvature of the spiral blade and guides the coal blocks to slide into the channel more smoothly, effectively preventing the coal blocks from moving between the spiral blades and causing rapid wear of the blades due to sudden speed changes.

[0035] In some embodiments, the helical angle of the spiral blade 6 varies in the range of 3°-60°. Changing the helical angle of the spiral blade 6 within the range of 3°-60°, even if the minimum helical angle of the spiral blade 6 is not less than 3° and the maximum helical angle of the spiral blade 6 is not more than 60°, is conducive to the smooth export of coal blocks, improves the coal block conveying efficiency, and is also conducive to the manufacture of a small thin coal seam coal mining machine cutting device.

[0036] It is understandable that the helix angle of the spiral blade 6 gradually increases in the direction away from the first end 11 of the drum 1. The minimum helix angle of the spiral blade 6 is close to the first end 11 of the drum 1, and the maximum helix angle of the spiral blade 6 is close to the second end 12 of the drum 1.

[0037] If the minimum helical angle of the spiral blade 6 is lower than 3°, that is, the helical angle at the first end 11 of the spiral blade 6 adjacent to the drum 1 is lower than 3°, the initial speed of the cut coal blocks entering the gap between the spiral blades 6 may be too slow, affecting the coal block conveying efficiency.

[0038] If the maximum helix angle of the spiral blade 6 is higher than 60°, that is, the helix angle of the spiral blade 6 at the second end 12 adjacent to the drum 1 is higher than 60°, the spiral cutting device 100 may have a larger size in the axial direction.

[0039] In some optional embodiments, the helical angle of the end of the spiral blade 6 adjacent to the first end 11 of the drum 1 is less than or equal to 15°, that is, the minimum helical angle of the spiral blade 6 is less than or equal to 15°. When the minimum helical angle of the spiral blade 6 is less than or equal to 15°, the cut coal blocks can smoothly enter the intervals between the spiral blades 6 and start to be transported.

[0040] For example, the helix angle of the end of the spiral blade 6 adjacent to the first end 11 of the drum 1 is 5°, 10° or 15°.

[0041] In some embodiments, the number of spiral blades 6 is 2-5. As an example, Figure 1-Figure 5 As shown, the spiral cutting device 100 has three spiral blades 6 , which are arranged at intervals in the circumferential direction of the drum 1 and connected to the outer circumferential surface of the drum 1 .

[0042] In some embodiments, the central angle of each spiral blade 6 is 40°-180°. Optionally, the spiral cutting device 100 has three spiral blades 6, and the central angle of each spiral blade 6 is 120°.

[0043] If the central angle corresponding to the spiral blade 6 is too small, for example, less than 40°, the coal block conveying path is shorter, which may cause the coal block to be discharged at a lower speed. If the central angle corresponding to the spiral blade 6 is too large, for example, greater than 180°, the coal block conveying path is longer, which may affect the coal block conveying efficiency.

[0044] In some embodiments, Figure 1-Figure 5 As shown, there is an angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1. During the cutting operation, the first cutting tooth 2 rotates with the drum 1 under the action of the drum 1. The first cutting tooth 2 tilted relative to the axial direction of the drum 1 has a stronger cutting force, which effectively improves the cutting efficiency. The multiple first cutting teeth 2 are rotationally symmetrical on the end face of the first end of the drum 1.

[0045] In the embodiment of the present invention, the arrangement of the plurality of first cutting teeth 2 provided on the end surface of the first end of the drum 1 may be any of the following.

[0046] In one embodiment of the present invention, the plurality of first cutting teeth 2 are arranged in a spiral with the central axis of the drum 1 as the center. For example, the plurality of first cutting teeth 2 are arranged in a spiral line from a position close to the central axis of the drum 1 and arranged in sequence. The plurality of first cutting teeth 2 are arranged in a spiral, which is conducive to smoothly guiding the cut coal blocks from the inside to the outside, avoiding the coal blocks from being unable to be output in time and generating a large resistance, which slows down the cutting process of the cutting device. Therefore, the plurality of first cutting teeth 2 are arranged in a spiral, which is conducive to speeding up the cutting speed and improving the cutting efficiency.

[0047] Preferably, when the spiral cutting device 100 is in coal mining operation, the rotation direction of the drum 1 conforms to the spiral direction of the plurality of first cutting teeth 2, so that the cutting operation can be carried out more smoothly.

[0048] In another embodiment of the present invention, Figure 3 As shown, the multiple first cutting teeth 2 are divided into multiple groups, each group of first cutting teeth includes multiple first cutting teeth 2, and the multiple first cutting teeth 2 in each group are arranged in a spiral from the inside to the outside, that is, the multiple first cutting teeth 2 in each group are arranged in sequence along the spiral line from the inside of the center axis of the drum 1. The multiple groups of first cutting teeth are rotationally symmetrical with the center axis of the drum 1 as the center line. Such an arrangement of multiple first cutting teeth 2 effectively avoids the coal blocks from being unable to be output in time and generating greater resistance, resulting in a slowdown in the cutting process of the cutting device, which is conducive to smoothly guiding the cut coal blocks from the inside to the outside, accelerating the cutting speed, and improving the cutting efficiency.

[0049] As an example, Figure 3As shown, the multiple first cutting teeth 2 of the spiral cutting device 100 are divided into three groups, each group of first cutting teeth includes 5 first cutting teeth 2, and the 5 first cutting teeth 2 in each group of first cutting teeth are arranged in sequence from the inner side of the central axis of the drum 1 to the outside along the spiral line, and the three groups of first cutting teeth are rotationally symmetrical with the central axis of the drum 1 as the center line. There is a gap between two adjacent groups of first cutting teeth in the circumferential direction of the drum 1 to guide the cut coal blocks to be smoothly discharged from the inside to the outside, effectively avoiding the coal blocks that cannot be discharged in time and generate greater resistance, resulting in the slowing down of the cutting process of the cutting device.

[0050] Understandably, Figure 3 The illustrated embodiment is only an example of the present invention. In other embodiments, the plurality of first cutting teeth 2 of the cutting device 100 may have other grouping arrangements.

[0051] Preferably, when the spiral cutting device 100 is in coal mining operation, the rotation direction of the drum 1 follows the spiral direction of the first cutting teeth 2, so that the cutting operation can be carried out more smoothly.

[0052] In another embodiment of the present invention, the plurality of first cutting teeth 2 are divided into a plurality of groups, each group of first cutting teeth includes a plurality of first cutting teeth 2, and the plurality of first cutting teeth 2 in each group are arranged at intervals along the circumference of the drum 1 with the central axis of the drum 1 as the center, and the plurality of groups of first cutting teeth are sequentially arranged and spaced from the inside to the outside.

[0053] In some embodiments, Figure 1-Figure 5 As shown, the central axis of the second cutting tooth 3 is orthogonal to the central axis of the drum 1 , and there is an angle between the central axis of the second cutting tooth 3 and the radial direction of the drum 1 .

[0054] Of course, the present invention is not limited thereto, and in other embodiments, the tooth tip of the second cutting tooth 3 may face outward and forward, that is, there is a certain angle between the central axis of the second cutting tooth 3 and the axial direction of the drum 1, and the angle is less than 90 degrees.

[0055] In some embodiments, the spiral cutting device 100 further includes an annular end plate 7 , which is sleeved on the drum 1 and connected to the outer circumference of the drum 1 , and the annular end plate 7 is adjacent to the first end of the drum 1 .

[0056] like Figure 1-Figure 5 As shown, the annular end plate 7 is located on one side of the plurality of spiral blades 6 adjacent to the first end of the drum 1, and the annular end plate 7 is connected to the ends of the plurality of spiral blades 6 adjacent to the first end of the drum 1. Figure 3 As shown, a plurality of through grooves 71 are provided on the annular end plate 7 , and the plurality of through grooves 71 are arranged at intervals along the circumference of the annular end plate 7 . The plurality of through grooves 71 and the plurality of intervals formed between the plurality of spiral blades 6 are connected one by one in the axial direction of the drum 1 .

[0057] The annular end plate 7 can stabilize the multiple spiral blades 6 and improve the structural strength of the multiple spiral blades 6. The cut coal blocks can be respectively led out from the multiple through grooves 71 set on the annular end plate 7, and enter the corresponding intervals between the spiral blades 6, and are led out along the intervals, effectively avoiding the accumulation of coal blocks between the first end of the drum 1 and the coal wall, generating resistance and affecting the cutting efficiency. The spiral blades 6 are spirally wound on the outer circumferential surface of the drum 1, and the coal blocks can be smoothly led out in accordance with the rotation of the drum 1. Therefore, the spiral cutting device 100 provided in the embodiment of the present invention has the advantage of high cutting efficiency.

[0058] like Figure 3 As shown, in an embodiment of the present invention, the through groove 71 is an arc-shaped groove, which extends along the circumference of the annular end plate 7 and has a certain length, so that it can better correspond to the interval between the spiral blades 6, avoid the annular end plate 7 from hindering the export of coal blocks, and promote the smooth export of coal blocks.

[0059] In some embodiments, Figure 1-Figure 5 As shown, the spiral cutting device 100 further includes a plurality of third cutting teeth 4, which are arranged at intervals on the outer peripheral surface of the annular end plate 7 along the circumferential direction of the annular end plate 7. The arrangement of the third cutting teeth 4 further improves the cutting efficiency.

[0060] The tooth tip of the third cutting tooth 4 faces outwards and / or the tooth tip of the third cutting tooth 4 faces forwards. Here, "forwards" means that the tooth tip of the third cutting tooth 4 faces the direction of excavation.

[0061] Optionally, the tooth tip of the third cutting tooth 4 faces outward, and the central axis of the third cutting tooth 4 is perpendicular to the axial direction of the drum 1 .

[0062] Optionally, the tooth tip of the third cutting tooth 4 faces outward and forward, and there is a certain angle between the central axis of the third cutting tooth 4 and the axial direction of the drum 1, and the angle is less than 90 degrees.

[0063] Optionally, there is an angle between the central axis of the third cutting tooth 4 and the radial direction of the drum 1 .

[0064] In some optional embodiments, the tooth tips of a portion of the plurality of third cutting teeth 4 face outward, the central axis of the third cutting teeth 4 is perpendicular to the axial direction of the drum 1, and an angle is formed between the central axis of the third cutting teeth 4 and the radial direction of the drum 1. The tooth tips of another portion of the plurality of third cutting teeth 4 face outward and forward, and an angle is formed between the central axis of the third cutting teeth 4 and the radial direction of the drum 1. With such an arrangement, the coal seam can be cut at more angles, further improving the cutting efficiency.

[0065] As an example, the plurality of third cutting teeth 4 are divided into a plurality of groups, and the plurality of groups of third cutting teeth 4 are arranged along the circumference of the annular end plate 7. Each group of third cutting teeth 4 includes a plurality of third cutting teeth 4, and the plurality of third cutting teeth 4 are sequentially arranged at intervals along the circumference of the annular end plate 7. Among the plurality of third cutting teeth 4 in each group of third cutting teeth 4, the angles between two adjacent third cutting teeth 4 and the axial direction of the drum 1 are different, specifically, as Figure 3 As shown, the directions of the tooth tips of several third cutting teeth 4 of each group of third cutting teeth 4 gradually move forward from outward along the circumferential direction of the drum 1 .

[0066] In some embodiments, Figure 1-Figure 5 As shown, the cutting device 100 further includes a plurality of fourth cutting teeth 5 , which are arranged on the end surface of the annular end plate 7 away from the spiral blade 6 , and are located between two adjacent through grooves 71 in the circumferential direction of the annular end plate 7 .

[0067] Specifically, Figure 3 As shown, nine fourth cutting teeth 5 are provided on the end surface of the annular end plate 7 away from the spiral blade 6. The nine fourth cutting teeth 5 are divided into three groups, each group includes three fourth cutting teeth 5, and the three groups of fourth cutting teeth and three through grooves 71 are alternately distributed in the circumferential direction of the annular end plate 7, that is, the three fourth cutting teeth 5 in each group of fourth cutting teeth are located between two adjacent channels 71 in the circumferential direction of the annular end plate 7. Figure 3 As shown, nine fourth cutting teeth 5 are arranged around the first cutting teeth 2 .

[0068] like Figure 2 As shown, the tooth tips of the fourth cutting teeth 5 are all arranged to face forward in an inclined manner, and an angle is formed between the central axis of the fourth cutting teeth 5 and the axial direction of the drum 1 .

[0069] Optionally, the angles between the central axis of the fourth cutting tooth 5 and the axial direction of the drum 1 are the same.

[0070] In some embodiments, Figure 4 As shown, the outer peripheral surface of the annular end plate 7 is aligned with the outer end surface of the spiral blade 6 in the radial direction of the drum 1, and the intervals between the spiral blades 6 have a certain depth, which can effectively transport coal blocks.

[0071] The embodiment of the present invention further provides a thin coal seam coal mining machine, which includes a frame, a cutting device and a driving device, wherein the cutting device is a spiral cutting device 100 of any of the above embodiments. The spiral cutting device 100 is arranged on the frame, and the drum 1 of the spiral cutting device 100 is arranged horizontally. The horizontal arrangement of the drum 1 of the spiral cutting device 100 means that the axial direction of the drum 1 is basically along the horizontal direction. The driving device is arranged on the frame, and the driving device is used to drive the drum 1 of the spiral cutting device 100 to rotate.

[0072] When the thin coal seam shearer is performing a cutting operation, the driving device drives the drum 1 to rotate, and the rotation of the drum 1 drives the plurality of first cutting teeth 2 arranged on the first end 11 to rotate.

[0073] In some embodiments, there are two spiral cutting devices 100, and the two spiral cutting devices 100 are arranged at intervals in the forward direction of the coal mining machine. The arrangement of the two spiral cutting devices 100 is conducive to improving the coal mining efficiency of the coal mining machine.

[0074] The embodiment of the present invention also provides a thin coal seam coal mining system, comprising: a coal mining machine and a traction system, wherein the coal mining machine is the thin coal seam coal mining machine in any of the above embodiments. The traction system is connected to the coal mining machine, and the traction system is used to traction the coal mining machine to move along the working face.

[0075] When the thin coal seam mining system is performing cutting operations, it is mainly divided into two main steps: 1. The cutting device 100 gradually moves forward (i.e., along the axial direction of the drum 1 into the coal wall), the first cutting tooth 2 contacts the coal wall, and cuts the coal wall along the thickness direction of the coal wall, i.e., digs into the coal wall; 2. The thin coal seam coal mining machine moves along the working face, and the extension direction of the working face is basically parallel to the coal wall. The moving direction of the thin coal seam coal mining machine is orthogonal to the axial direction of the drum 1 of the cutting device 100, and the coal wall is peeled off.

[0076] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A spiral cutting device, characterized in that: include: a roller having a first end and a second end opposite to each other in an axial direction thereof; A plurality of spiral blades, wherein the spiral blades are spirally wound around the outer circumferential surface of the drum, the plurality of spiral blades are spaced apart in the circumferential direction of the drum, and the spiral angle of the spiral blades gradually increases in a direction away from the first end of the drum; A plurality of first cutting teeth, the plurality of first cutting teeth being arranged at intervals on the end surface of the first end of the drum; and A plurality of second cutting teeth are provided on each of the spiral blades.

2. The spiral cutting device according to claim 1, characterized in that: The helical pitch angle of the spiral blade varies in the range of 3°-60°; and / or, The helix angle of the end portion of the spiral blade adjacent to the first end of the drum is less than or equal to 15°.

3. The spiral cutting device according to claim 1, characterized in that: The number of the spiral blades is 2-5, and / or the central angle corresponding to each spiral blade is 40°-180°.

4. The spiral cutting device according to claim 1, characterized in that: An included angle is formed between the central axis of the first cutting tooth and the axial direction of the drum, and the plurality of first cutting teeth are rotationally symmetrical on the end surface of the first end of the drum.

5. The spiral cutting device according to claim 1, characterized in that: The central axis of the second cutting tooth is orthogonal to the central axis of the drum, and an angle is formed between the central axis of the second cutting tooth and the radial direction of the drum.

6. The spiral cutting device according to any one of claims 1 to 5, characterized in that: Also includes: An annular end plate, wherein the annular end plate is sleeved on the roller and connected to the outer circumferential surface of the roller, the annular end plate is located on one side of the first end of the roller adjacent to the plurality of spiral blades and is connected to the plurality of spiral blades, a plurality of through grooves are formed on the annular end plate, and the plurality of through grooves are arranged at intervals along the circumference of the annular end plate, and the plurality of intervals formed between the plurality of through grooves and the plurality of spiral blades are connected one-to-one in the axial direction of the roller.

7. The spiral cutting device according to claim 6, characterized in that: The spiral cutting device further comprises a plurality of third cutting teeth, wherein the plurality of third cutting teeth are arranged at intervals along the circumference of the annular end plate on the outer circumferential surface of the annular end plate; and / or, The outer peripheral surface of the annular end plate is aligned with the outer end surface of the spiral blade in the radial direction of the drum.

8. A thin coal seam mining machine, characterized in that: include: frame; A cutting device, wherein the cutting device is a spiral cutting device according to any one of claims 1 to 7, wherein the spiral cutting device is arranged on the frame, and the drum of the spiral cutting device is arranged horizontally; and A driving device is arranged on the frame and is used to drive the drum of the spiral cutting device to rotate.

9. The thin coal seam mining machine according to claim 8, characterized in that: There are two cutting devices, and the two cutting devices are arranged at intervals in the forward direction of the coal mining machine.

10. A thin coal seam mining system, characterized in that: include: A coal mining machine, wherein the coal mining machine is a thin coal seam coal mining machine according to claim 8 or 9; A traction system is connected to the coal mining machine, and the traction system is used to tow the coal mining machine to move along the working face.

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