Thin coal seam cutting device, coal winning machine and coal winning system

Abstract

The application discloses a thin coal seam cutting device, a coal mining machine and a coal mining system. The thin coal seam cutting device comprises a drum and a plurality of first cutting teeth. The plurality of first cutting teeth are arranged on the end face of the first end of the drum at intervals. Compared with the first cutting teeth far away from the central axis of the drum, the tooth tip of the first cutting tooth close to the central axis of the drum is farther away from the end face of the first end of the drum. The tooth tips of the plurality of first cutting teeth are located on a first arc surface, and the first arc surface is an arc surface protruding in the direction away from the end face of the first end of the drum. Compared with the end part of the feed cutting device in the related art which is generally a plane structure, the thin coal seam cutting device provided by the embodiment of the application can more efficiently destroy the coal wall and cut the coal wall when feeding, greatly improving the coal mining speed and the coal mining efficiency. Moreover, the thin coal seam cutting device provided by the embodiment of the application has strong cutting strength and is suitable for cutting of hard coal rock.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine machinery and equipment, and particularly relates to a thin coal seam cutting device, a coal winning machine and a coal winning system. BACKGROUND

[0002] Thin coal seam refers to a coal seam with a thickness of 1.0-1.3m, accounting for 18% of the total coal reserves. The traditional way of mining thin coal seam is blasting mining and general mining, which is low in efficiency and poor in safety. In recent years, thin coal seam is mined by a fully mechanized mining machine set (a rocker arm type electric traction drum coal winning machine + a scraper conveyor + a hydraulic support), the coal cutting process of which is that the coal winning machine cuts in obliquely, cuts triangular coal in return, sweeps bottom coal, and cuts coal in a straight line, the whole process being complicated in cutting-in operation, time-consuming and labor-intensive, and low in reliability of automatic operation, especially in the process of thin coal seam mining, the operator cannot normally enter the working face to follow the machine operation, so this way has not been widely promoted in thin coal seam mining.

[0003] In addition, the commonly used thin coal seam mining technologies include a coal plough mining technology and a comprehensive mechanized coal mining technology, but the coal plough has the disadvantages of low cutting hardness and poor efficiency, and the above coal mining technologies are not suitable for cutting of hard coal rock and are low in cutting efficiency. SUMMARY

[0004] The present application aims to at least partly solve one of the problems in the related art. To this end, an embodiment of the present application proposes a thin coal seam cutting device.

[0005] An embodiment of the present application further proposes a thin coal seam coal winning machine.

[0006] An embodiment of the present application further proposes a thin coal seam coal winning system.

[0007] The thin coal seam cutting device of the embodiment of the present application comprises: a drum, the drum having a first end and a second end opposite in the axial direction thereof; a plurality of first cutting teeth, the plurality of first cutting teeth being arranged on the end face of the first end of the drum, the tooth tip of the first cutting tooth close to the central axis of the drum being farther away from the end face of the first end of the drum than the tooth tip of the first cutting tooth farther away from the central axis of the drum, the tooth tips of the plurality of first cutting teeth being located on a first arc surface, the first arc surface being an arc surface protruding away from the end face of the first end of the drum.

[0008] The thin coal seam cutting device provided by the embodiment of the present application comprises a drum and a plurality of first cutting teeth, the plurality of first cutting teeth are arranged on the end face of the first end of the drum, the tooth tips of the plurality of first cutting teeth are located on a first arc surface, and the first arc surface is an arc surface protruding in a direction away from the end face of the first end of the drum. In this way, the end part of the thin coal seam cutting device provided by the embodiment of the present application is configured as an arc structure. Compared with the end part of the cutting-in cutting device in the related art, which is generally a planar structure, the thin coal seam cutting device provided by the embodiment of the present application can more efficiently damage the coal wall and cut the coal wall when cutting in, greatly improving the coal mining speed and efficiency, and the thin coal seam cutting device provided by the embodiment of the present application has strong cutting strength, good cutting effect, and is suitable for cutting of hard coal and rock.

[0009] In some embodiments, the first cutting teeth have an included angle between the central axis and the axial direction of the drum, wherein,

[0010] The included angle between the central axis of the first cutting teeth close to the central axis of the drum and the axial direction of the drum is smaller than that of the first cutting teeth away from the central axis of the drum; or

[0011] The length of the first cutting teeth close to the central axis of the drum is longer than that of the first cutting teeth away from the central axis of the drum.

[0012] In some embodiments, the end face of the first end of the drum is an arc surface protruding in a direction away from the second end of the drum, or the end face of the first end of the drum is a planar surface perpendicular to the central axis of the drum.

[0013] In some embodiments, the plurality of first cutting teeth are arranged in a spiral around the central axis of the drum; the plurality of first cutting teeth are divided into a plurality of groups, each group of first cutting teeth comprises a plurality of first cutting teeth, and the plurality of first cutting teeth are arranged in a spiral from inside to outside, and the plurality of groups of first cutting teeth are rotationally symmetrical around the central axis of the drum; or the plurality of first cutting teeth are divided into a plurality of groups, each group of first cutting teeth comprises a plurality of first cutting teeth, and the plurality of first cutting teeth are arranged along the circumferential direction of the drum and spaced apart around the central axis of the drum, and the plurality of groups of first cutting teeth are sequentially arranged and spaced apart from inside to outside.

[0014] In some embodiments, the thin coal seam cutting device further comprises:

[0015] A plurality of spiral blades are spirally arranged on the outer circumferential surface of the drum, and the plurality of spiral blades are arranged at intervals in the circumferential direction of the drum.

[0016] A ring-shaped end plate is sleeved on the roller and connected with the outer circumferential surface of the roller, the ring-shaped end plate is adjacent to the first end of the roller, a plurality of through grooves are formed in the ring-shaped end plate, the plurality of through grooves are arranged at intervals in the circumferential direction of the ring-shaped end plate, and the plurality of intervals formed between the plurality of spiral blades and the plurality of through grooves are communicated one by one in the axial direction of the roller.

[0017] In some embodiments, the thin seam cutting device further comprises at least one of the following options:

[0018] A plurality of second cutting teeth are arranged at intervals on the end surface of each spiral blade away from the outer circumferential surface of the roller.

[0019] A plurality of third cutting teeth are arranged at intervals in the circumferential direction of the ring-shaped end plate on the outer circumferential surface of the ring-shaped end plate.

[0020] A plurality of fourth cutting teeth are arranged on the end surface of the ring-shaped end plate away from the spiral blade, and the fourth cutting teeth are located between two adjacent through grooves in the circumferential direction of the ring-shaped end plate.

[0021] In some embodiments, the thin seam cutting device comprises a plurality of third cutting teeth, and the included angles between the central axes of two adjacent third cutting teeth in the circumferential direction of the roller and the axial direction of the roller are different.

[0022] Another aspect of the present application provides a thin seam shearer, comprising: a rack; a cutting device, the cutting device being the thin seam cutting device according to any one of the above embodiments, the cutting device being arranged on the rack, and the roller of the cutting device being horizontally arranged; and a driving device, the driving device being arranged on the rack, and the driving device being used for driving the roller of the cutting device to rotate.

[0023] In some embodiments, the cutting device is two, and the two cutting devices are arranged at intervals in the advancing direction of the shearer.

[0024] Still another aspect of the present application provides a thin seam coal mining system, comprising: a shearer, the shearer being the thin seam shearer according to any one of the above embodiments; and a traction system, the traction system being connected with the shearer, and the traction system being used for towing the shearer to move along a working face. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of the thin seam cutting device of the embodiment of the present application.

[0026] Figure 2 is another schematic view of the thin seam cutting device of the embodiment of the present application.

[0027] Figure 3 is a plan view of the thin coal seam cutting device according to an embodiment of the present application.

[0028] Figure 4 is a front view of the thin coal seam cutting device according to an embodiment of the present application.

[0029] Reference signs:

[0030] the cutting device 100,

[0031] the drum 1, the first end 11, the second end 12,

[0032] the first cutting tooth 2,

[0033] the second cutting tooth 3,

[0034] the third cutting tooth 4,

[0035] the fourth cutting tooth 5,

[0036] the helical blade 6,

[0037] the annular end plate 7, the through slot 71. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0039] The cutting device 100 according to an embodiment of the present application is described below. Figures 1-4 The cutting device 100 according to an embodiment of the present application is described below.

[0040] The drum 1 has a first end 11 and a second end 12 opposite to each other in the axial direction of the drum 1. In the operation of feeding, the drum 1 is generally laid horizontally, i.e. 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, i.e. the first end 11 of the drum 1 is adjacent to the coal wall, and the second end 12 of the drum is away from the coal wall, and the first end 11 of the drum 1 moves towards the coal wall.

[0041] The plurality of first cutting teeth 2 are arranged on the end surface of the first end 11 of the drum 1, and the tooth tip of the first cutting tooth 2 faces away from the end surface of the first end 11 of the drum 1, i.e. faces the coal wall, so that when the cutting device 100 feeds, the tooth tip of the first cutting tooth 2 contacts the coal wall, and the drum 1 rotates, and the first cutting tooth 2 breaks the coal seam on the coal wall.

[0042] As shown in FIG. 1, the cutting device 100 according to an embodiment of the present application comprises a drum 1 and a plurality of first cutting teeth 2. Figure 3As shown, compared with the first cutting tooth 2 which is far from the central axis of the roller 1, the tooth tip of the first cutting tooth 2 which is close to the central axis of the roller 1 is further away from the second end 12 of the roller 1. The tooth tips of multiple first cutting teeth 2 are located on the first arc surface, which is an arc surface that protrudes in the direction away from the end face of the first end 11 of the roller 1.

[0043] The direction adjacent to the central axis of the roller 1 is defined as the "inner" direction, and the direction away from the central axis of the roller 1 is defined as the "outer" direction. In an embodiment of the present invention, the tip of the first cutting tooth 2 located on the inner side is further away from the second end 12 of the roller 1 than the tip of the first cutting tooth 2 located on the outer side, thereby constructing a structure in which the tips of a plurality of first cutting teeth 2 are located on the first arc surface.

[0044] The thin coal seam cutting device provided in this embodiment of the invention includes a drum and a plurality of first cutting teeth. The plurality of first cutting teeth are disposed on the end face of the first end of the drum, and the tips of the plurality of first cutting teeth are located on a first arc surface. The first arc surface is an arc surface that protrudes away from the end face of the first end of the drum. Thus, the end of the cutting device of the thin coal seam cutting device provided in this embodiment of the invention is constructed as an arc-shaped structure. Compared with the end of the cutting device in the related art, which is usually a planar structure, the thin coal seam cutting device provided in this embodiment of the invention can more efficiently break the coal wall and cut the coal wall during cutting, greatly improving the coal mining speed and efficiency. Furthermore, the thin coal seam cutting device provided in this embodiment of the invention has strong cutting force and good cutting effect, and is suitable for cutting harder coal and rock.

[0045] In some embodiments, such as Figures 1-4 As shown, the central axis of the first cutting tooth 2 forms an angle with 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, which is inclined relative to the axial direction of the drum 1, has a stronger cutting force and effectively improves the cutting efficiency.

[0046] In some alternative embodiments, such as Figures 1-4 As shown, compared with the first cutting tooth 2 that is far from the central axis of the drum 1, the angle between the central axis of the first cutting tooth 2 that is close to the central axis of the drum 1 and the axial direction of the drum 1 is smaller. That is, the angle between the central axis of the first cutting tooth 2 located on the inner side and the axial direction of the drum 1 is smaller than the angle between the central axis of the first cutting tooth 2 located on the outer side and the axial direction of the drum 1, so that the tooth tips of the multiple first cutting teeth 2 are constructed as arc-shaped structures.

[0047] Of course, it can be understood that the tooth tips of the plurality of first cutting teeth 2 on the end face of the first end of the drum 1 are configured as an arc structure, which is not limited to the above embodiment, and the tooth tips of the plurality of first cutting teeth 2 can also be located on a first arc face by other means, and the first arc face is an arc face protruding away from the end face of the first end of the drum 1.

[0048] For example, in other optional embodiments, the length of the first cutting teeth 2 near the central axis of the drum 1 is longer than that of the first cutting teeth 2 away from the central axis of the drum 1, and the tooth tips of the plurality of first cutting teeth 2 are configured as an arc structure, i.e. the tooth tips of the plurality of first cutting teeth 2 are located on a first arc face.

[0049] Preferably, the above embodiment in which the angle between the central axis of the first cutting teeth 2 near the central axis of the drum 1 and the axial direction of the drum 1 is smaller than that of the first cutting teeth 2 away from the central axis of the drum 1, because the plurality of first cutting teeth 2 have different angles between the central axis and the axial direction of the drum 1, which can produce better cutting effect when the cutting device 100 is cutting, and further improve the cutting efficiency.

[0050] In some embodiments, as shown in Figures 1-4 The end face of the first end 11 of the drum 1 is perpendicular to the plane of the central axis of the drum 1, and the plurality of first cutting teeth 2 arranged on the end face of the first end of the drum 1 are arranged by being provided with different inclination angles or different lengths, so that the tooth tips of the plurality of first cutting teeth 2 are located on a first arc face, and the first arc face is an arc face protruding away from the end face of the first end of the drum 1.

[0051] It should be noted that the present application is not limited to this. In other optional embodiments, the end face of the first end 11 of the drum 1 can be an arc face protruding away from the second end 12 of the drum 1, and the plurality of first cutting teeth 2 arranged on the end face of the first end of the drum 1 can also be provided with different inclination angles or different lengths, so that the tooth tips of the plurality of first cutting teeth 2 are located on a first arc face, and the first arc face is an arc face protruding away from the end face of the first end of the drum 1.

[0052] In the embodiments of the present application, the arrangement of the plurality of first cutting teeth 2 arranged on the end face of the first end of the drum 1 can be any of the following.

[0053] In an embodiment of the present application, the plurality of first cutting teeth 2 are arranged in a spiral around the central axis of the drum 1. For example, the plurality of first cutting teeth 2 are arranged in a spiral outwardly from the position adjacent to the central axis of the drum 1. The spiral arrangement of the plurality of first cutting teeth 2 facilitates the smooth guiding of the cut coal from the inside to the outside, avoiding the generation of large resistance due to the failure of the coal to be output in time, thereby slowing down the cutting process of the cutting device. Therefore, the spiral arrangement of the plurality of first cutting teeth 2 facilitates the acceleration of the cutting speed and the improvement of the cutting efficiency.

[0054] Preferably, when the cutting device 100 is in the feeding operation, the rotation direction of the drum 1 is consistent with the spiral direction of the plurality of first cutting teeth 2, so that the cutting operation is more smoothly performed.

[0055] In another embodiment of the present application, as shown in Figure 4 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 in a spiral from the inside to the outside, i.e. the plurality of first cutting teeth 2 in each group are arranged outwardly in a spiral from the inside adjacent to the central axis of the drum 1. The plurality of groups of first cutting teeth are rotationally symmetrical around the central axis of the drum 1. The arrangement of the plurality of first cutting teeth 2 effectively avoids the generation of large resistance due to the failure of the coal to be output in time, thereby slowing down the cutting process of the cutting device. The arrangement facilitates the smooth guiding of the cut coal from the inside to the outside, accelerates the cutting speed, and improves the cutting efficiency.

[0056] As an example, as shown in Figure 4 the plurality of first cutting teeth 2 of the cutting device 100 are divided into three groups, each group of first cutting teeth includes five first cutting teeth 2, the five first cutting teeth 2 in each group of first cutting teeth are arranged outwardly in a spiral from the inside adjacent to the central axis of the drum 1, and the three groups of first cutting teeth are rotationally symmetrical around the central axis of the drum 1. There is a gap between the two adjacent groups of first cutting teeth in the circumferential direction of the drum 1 to guide the cut coal to be smoothly guided from the inside to the outside, effectively avoiding the generation of large resistance due to the failure of the coal to be output in time, thereby slowing down the cutting process of the cutting device.

[0057] It can be understood that, Figure 4 the embodiment shown in the figure is only an example of the present application, and in other embodiments, the plurality of first cutting teeth 2 of the cutting device 100 can have other grouping modes.

[0058] Preferably, when the cutting device 100 is in the feeding operation, the rotation direction of the drum 1 is consistent with the spiral direction of the first cutting teeth 2, so that the cutting operation is more smoothly performed.

[0059] In another embodiment of the present application, the plurality of first cutting teeth 2 are divided into groups, each group of first cutting teeth including a plurality of first cutting teeth 2, and the plurality of first cutting teeth 2 in each group are arranged in a circumferential direction of the drum 1 with the center axis of the drum 1 as the center, and the plurality of groups of first cutting teeth are arranged in a nested manner from inside to outside.

[0060] In some embodiments, as shown in Figures 1-4 The cutting device 100 further includes an annular end plate 7 and a plurality of spiral blades 6, the spiral blades 6 are helically arranged on the outer circumferential surface of the drum 1, and the plurality of spiral blades 6 are arranged in a circumferential direction of the drum 1. The annular end plate 7 is nested on the drum 1 and connected to the outer circumferential surface of the drum 1, and the annular end plate 7 is adjacent to the first end of the drum 1. As shown in Figures 1-4 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 end of the plurality of spiral blades 6 adjacent to the first end of the drum 1. As shown in Figure 4 A plurality of through grooves 71 are formed in the annular end plate 7, the plurality of through grooves 71 are arranged in a circumferential direction of the annular end plate 7, and the plurality of through grooves 71 and the plurality of intervals formed between the plurality of spiral blades 6 are in one-to-one correspondence in an axial direction of the drum 1.

[0061] The annular end plate 7 can stabilize the plurality of spiral blades 6 and improve the structural strength of the plurality of spiral blades 6. The coal blocks can be guided out of the plurality of through grooves 71 provided on the annular end plate 7 and into the intervals between the corresponding spiral blades 6, and then guided 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 helical arrangement of the spiral blades 6 on the outer circumferential surface of the drum 1 can conform to the rotation of the drum 1 and smoothly guide the coal blocks out. Thus, the cutting device 100 provided by the embodiments of the present application has the advantage of high cutting efficiency.

[0062] As shown in Figure 4 In the embodiments of the present application, the through grooves 71 are arc-shaped grooves, which extend in a circumferential direction of the annular end plate 7 with a certain length, thereby better corresponding to the intervals between the spiral blades 6, avoiding hindering the guiding of coal blocks by the annular end plate 7, and promoting the smooth guiding of coal blocks.

[0063] In some embodiments, as shown in Figures 1-3 The cutting device 100 further includes a plurality of second cutting teeth 3, and a plurality of second cutting teeth 3 are arranged on the end surface of each spiral blade 6 away from the outer circumferential surface of the drum 1, i.e. the plurality of second cutting teeth 3 are divided into groups and arranged on the outer end surface of the plurality of spiral blades 6 in sequence. The arrangement of the second cutting teeth 3 can cut the coal seam at more angles, further improving the cutting efficiency.

[0064] In this configuration, the tips of the second cutting teeth 3 face outwards and / or forwards. Here, "forwards" means that the tips of the second cutting teeth 3 face the direction of the feed.

[0065] Optionally, the tips of the second cutting teeth 3 face outwards, and the central axis of the second cutting teeth 3 is perpendicular to the axis of the roller 1.

[0066] Optionally, the tips of the second cutting teeth 3 face outward and forward, and the central axis of the second cutting teeth 3 has a certain angle with the axial direction of the roller 1, which is less than 90 degrees.

[0067] Optionally, the central axis of the second cutting tooth 3 has an angle with the radial direction of the roller 1.

[0068] exist Figures 1-4 In the embodiment shown, the tip of the second cutting tooth 3 faces outward, the central axis of the second cutting tooth 3 is perpendicular to the axial direction of the roller 1, and there is an angle between the central axis of the second cutting tooth 3 and the radial direction of the roller 1.

[0069] In some embodiments, such as Figures 1-4 As shown, the cutting device 100 also includes a plurality of third cutting teeth 4, which are spaced apart along the circumference of the annular end plate 7 on its outer circumferential surface. The arrangement of the third cutting teeth 4 further improves the cutting efficiency.

[0070] In this configuration, the tip of the third cutting tooth 4 faces outward and / or the tip of the third cutting tooth 4 faces forward. Here, "facing forward" means that the tip of the third cutting tooth 4 faces the direction of the feed.

[0071] Optionally, the tip of the third cutting tooth 4 faces outward, and the central axis of the third cutting tooth 4 is perpendicular to the axis of the roller 1.

[0072] Optionally, the tip of the third cutting tooth 4 faces outward and forward, and the central axis of the third cutting tooth 4 has a certain angle with the axial direction of the roller 1, which is less than 90 degrees.

[0073] Optionally, the central axis of the third cutting tooth 4 has an angle with the radial direction of the roller 1.

[0074] In some alternative embodiments, a portion of the third cutting teeth 4 have their tips facing outwards, their central axes perpendicular to the axial direction of the drum 1, and their central axes form an angle with the radial direction of the drum 1. Another portion of the third cutting teeth 4 have their tips facing outwards and forwards, and their central axes also form an angle with the radial direction of the drum 1. This arrangement allows for cutting of the coal seam at more angles, further improving cutting efficiency.

[0075] As an example, the plurality of third cutting teeth 4 are divided into multiple groups, and the multiple groups of third cutting teeth 4 are arranged along the circumferential direction 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 and spacedly arranged along the circumferential direction of the annular end plate 7. Among the plurality of third cutting teeth 4 of each group of third cutting teeth 4, the included angle between the adjacent two third cutting teeth 4 and the axial direction of the drum 1 is different. Specifically, as shown in Figure 3 the tooth tips of the plurality of third cutting teeth 4 of each group of third cutting teeth 4 gradually face forward along the circumferential direction of the drum 1 from outward.

[0076] In some embodiments, as shown in Figures 1-4 the cutting device 100 further includes a plurality of fourth cutting teeth 5, the plurality of fourth cutting teeth 5 are arranged on the end surface of the annular end plate 7 away from the spiral blade 6, and the plurality of fourth cutting teeth 5 are located between the two adjacent through grooves 71 in the circumferential direction of the annular end plate 7.

[0077] Specifically, as shown in Figure 4 the end surface of the annular end plate 7 away from the spiral blade 6 is provided with nine fourth cutting teeth 5, 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 the 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 the two adjacent through grooves 71 in the circumferential direction of the annular end plate 7. As shown in Figure 4 the nine fourth cutting teeth 5 are arranged around the first cutting tooth 2.

[0078] As shown in Figure 2 the tooth tips of the fourth cutting teeth 5 are all arranged obliquely forward, and the central axis of the fourth cutting teeth 5 has an included angle with the axial direction of the drum 1.

[0079] Optionally, the included angle between the central axis of the fourth cutting teeth 5 and the axial direction of the drum 1 is the same.

[0080] The embodiment of the present application also provides a thin seam coal mining machine, which includes a rack, a cutting device and a driving device, wherein the cutting device is the cutting device 100 of any one of the above-mentioned embodiments. The cutting device 100 is arranged on the rack, and the drum 1 of the cutting device 100 is horizontally arranged, that is, the axial direction of the drum 1 is substantially along the horizontal direction. The driving device is arranged on the rack, and the driving device is used to drive the drum 1 of the cutting device 100 to rotate.

[0081] When the thin seam coal mining machine performs cutting operation, the driving device drives the drum 1 to rotate, and the drum 1 drives the plurality of first cutting teeth 2 arranged on the first end 11 to rotate.

[0082] In some embodiments, the cutting device 100 is two, and the two cutting devices 100 are arranged at intervals in the advancing direction of the coal mining machine. The arrangement of the two cutting devices 100 is beneficial to improve the coal mining efficiency of the coal mining machine.

[0083] The embodiment of the present application also provides a thin seam coal mining system, comprising: a coal mining machine and a traction system, wherein the coal mining machine is the thin seam coal mining machine in any one of the above embodiments. The traction system is connected with the coal mining machine, and the traction system is used to pull the coal mining machine to move along the working face.

[0084] The thin seam coal mining system mainly includes two main steps when performing the cutting operation: 1. The cutting device 100 gradually moves forward (i.e., along the axial direction of the drum 1 into the coal wall), and the first cutting tooth 2 contacts the coal wall to cut the coal wall along the thickness direction of the coal wall, i.e., the cutting tooth moves into the coal wall; 2. The thin seam coal mining machine moves along the working face, and the extension direction of the working face is substantially parallel to the coal wall, and the moving direction of the thin seam coal mining machine is orthogonal to the axial direction of the drum 1 of the cutting device 100, so as to strip the coal wall.

[0085] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0086] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0087] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0088] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly contacting the first and second features, or indirectly contacting the first and second features through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0089] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for different elements, regions, or layers, and are not intended to be taken literally, unless otherwise specified.

[0090] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present application, and that changes, modifications, substitutions and variations can be made therein by those skilled in the art without departing from the scope of the present application.

Claims

1. A thin coal seam cutting device, characterized in that, include: A roller having a first end and a second end opposite each other in its axial direction; A plurality of first cutting teeth are spaced apart on the end face of the first end of the drum. Compared with the first cutting teeth that are away from the central axis of the drum, the tips of the first cutting teeth that are close to the central axis of the drum are further away from the end face of the first end of the drum. The tips of the plurality of first cutting teeth are located on a first arc surface, which is an arc surface that protrudes in a direction away from the end face of the first end of the drum. Multiple helical blades are helically wound around the outer circumferential surface of the drum, and the multiple helical blades are spaced apart in the circumferential direction of the drum; An annular end plate is fitted onto the roller and connected to the outer circumferential surface of the roller. The annular end plate is adjacent to the first end of the roller. Multiple through slots are provided on the annular end plate. The multiple through slots are spaced apart along the circumference of the annular end plate. The multiple through slots and the multiple gaps formed between the multiple helical blades are connected one-to-one in the axial direction of the roller. The thin coal seam cutting device also includes: Multiple second cutting teeth are provided on the end face of each helical blade away from the outer peripheral surface of the drum. Multiple third cutting teeth are spaced apart circumferentially on the outer circumferential surface of the annular end plate. The angle between the central axis of two adjacent third cutting teeth in the circumferential direction of the roller and the axial direction of the roller is different. A plurality of fourth cutting teeth are provided on the end face of the annular end plate away from the helical blade, and the fourth cutting teeth are located between two adjacent through slots in the circumferential direction of the annular end plate.

2. The thin coal seam cutting device according to claim 1, characterized in that, The central axis of the first cutting tooth forms an angle with the axial direction of the roller, wherein, Compared to the first cutting tooth farther from the central axis of the drum, the first cutting tooth closer to the central axis of the drum has a smaller angle between its central axis and the axial direction of the drum; or The first cutting tooth that is closer to the central axis of the drum is longer than the first cutting tooth that is farther away from the central axis of the drum.

3. The thin coal seam cutting device according to claim 1 or 2, characterized in that, The end face of the first end of the roller is an arc surface that protrudes away from the second end of the roller, or the end face of the first end of the roller is a plane that is perpendicular to the central axis of the roller.

4. The thin coal seam cutting device according to claim 1 or 2, characterized in that, The plurality of the first cutting teeth are arranged in a spiral around the central axis of the roller; The plurality of first cutting teeth are divided into multiple groups, each group of first cutting teeth includes several first cutting teeth, and the several first cutting teeth are arranged spirally from the inside to the outside. The multiple groups of first cutting teeth are rotationally symmetrical about the central axis of the roller; or The first cutting teeth are divided into multiple groups, and each group of first cutting teeth includes several first cutting teeth. The several first cutting teeth are arranged at intervals along the circumference of the roller with the central axis of the roller as the center. The multiple groups of first cutting teeth are nested from the inside to the outside and are arranged at intervals.

5. A thin coal seam mining machine, characterized in that, include: frame; A cutting device, wherein the cutting device is a thin coal seam cutting device according to any one of claims 1-4, the cutting device is mounted on the frame, and the drum of the cutting device is arranged horizontally; and A drive unit is mounted on the frame and is used to drive the drum of the cutting device to rotate.

6. The thin coal seam mining machine according to claim 5, characterized in that, There are two cutting devices, which are spaced apart in the forward direction of the coal mining machine.

7. A thin coal seam mining system, characterized in that, include: The coal mining machine is a thin coal seam coal mining machine according to claim 5 or 6; A traction system, which is connected to the coal mining machine, is used to move the coal mining machine along the working face.

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