A coal mining machine and method applied to coal and gangue separate mining

Abstract

The application discloses a coal cutter and a coal mining method applied to coal and gangue separate mining, and the technical scheme is as follows: a machine body; two swing arms, which are respectively rotationally connected to two ends of the machine body; two main rollers, which are respectively rotationally connected to one side of the two swing arms close to a coal wall; a sub-roller, which is arranged on one side of the machine body close to the coal wall, the axis of the sub-roller is horizontal and perpendicular to the length direction of the machine body, the axes of the two main rollers are parallel to the axis of the sub-roller; and a telescopic mechanism, which is used for driving the sub-roller to extend out and retract into the machine body, when the sub-roller extends out of the machine body farthest, the distance between one end of the sub-roller far from the machine body and one side of the machine body close to the coal wall is greater than the distance between one end of the main roller close to the coal wall and one side of the machine body close to the coal wall; the sub-roller is used for collecting raw coal in a thin coal seam, the two main rollers are used for collecting gangue on the top and bottom of the thin coal seam, and the raw coal and the gangue can be separately mined by using the coal cutter.

Description

Technical Field

[0001] This invention relates to a coal mining machine, and more specifically, to a coal mining machine and method for separating coal and gangue. Background Technology

[0002] With the significant improvement in the level of mechanized mining of thin coal seams in China, the proportion of thin coal seam mining has gradually increased. When mining thin coal seams, existing coal mining machines can only mine the thin coal seam and the gangue at the top and bottom of the thin coal seam at the same time. However, the raw coal collected contains a large amount of gangue, which needs to be separated from the raw coal and gangue in the later stage.

[0003] There is an urgent need for a coal mining equipment that can separately mine raw coal and gangue. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a coal mining machine and coal mining method for coal and gangue mining. It collects raw coal in thin coal seams through a secondary drum and collects gangue from the top and bottom of the thin coal seams through two main drums, thus enabling the separate mining of raw coal and gangue through the coal mining machine.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coal mining machine for coal and gangue mining, comprising a machine body;

[0006] Two rocker arms are provided, each rotatably connected to both ends of the machine body;

[0007] There are two main drums, which are rotatably connected to the two rocker arms on the side near the coal wall. The diameter of the main drum is greater than the thickness of the thin coal seam.

[0008] The auxiliary drum is located on the side of the machine body closest to the coal wall. The axis of the auxiliary drum is horizontal and perpendicular to the length direction of the machine body. The axes of the two main drums are parallel to the axis of the auxiliary drum.

[0009] And a telescopic mechanism, which is used to push the auxiliary drum to extend and retract into the machine body. When the auxiliary drum extends the farthest from the machine body, the distance between the end of the auxiliary drum away from the machine body and the side of the machine body near the coal wall is greater than the distance between the end of the main drum near the coal wall and the side of the machine body near the coal wall.

[0010] By adopting the above technical solution, when mining raw coal in thin coal seams, the auxiliary drum is extended from the machine body through the telescopic mechanism and inserted into the thin coal seam for raw coal mining. When the main drum is close to the coal wall, the auxiliary drum is retracted into the machine body. The two main drums are used to collect gangue from the top and bottom of the thin coal seam until the gangue is level with the thin coal seam. Then the auxiliary drum is extended again to mine the thin coal seam. The auxiliary drum can be used to collect raw coal and gangue separately, so that there is no need to separate the gangue and raw coal afterward.

[0011] The invention is further configured to include a housing, with an auxiliary roller mounted on the housing, and a telescopic mechanism directly driving the housing to move.

[0012] The present invention is further configured to include a power mechanism disposed within the housing;

[0013] And a transmission mechanism, which is located inside the housing and is connected to the power mechanism for transmission. The transmission mechanism is connected to the auxiliary roller for transmission.

[0014] The invention is further configured to include an output shaft located at one end of the housing where the auxiliary roller is located, with one end extending into the housing and connected to the transmission mechanism. The auxiliary roller is sleeved on the outside of the output shaft and is driven to rotate by the output shaft.

[0015] The present invention is further configured such that: the telescopic mechanism is a hydraulic cylinder, which drives the box to extend and retract.

[0016] The present invention is further configured such that the telescopic mechanism includes two hydraulic cylinders.

[0017] By adopting the above technical solution, the extension and retraction of the auxiliary roller can be more stable through the use of two hydraulic cylinders.

[0018] The invention is further configured such that: a groove is provided on the side of the machine body near the coal wall, and a telescopic mechanism is provided in the groove, which can drive the box body and the auxiliary roller to retract into the groove.

[0019] By adopting the above technical solution, the box and the auxiliary roller can be stored by setting grooves.

[0020] The present invention is further configured such that the transmission mechanism is composed of multiple gears, which mesh with each other in sequence.

[0021] The present invention is further configured such that: the cylinder body of the hydraulic cylinder is fixed to the machine body, and the piston rod of the hydraulic cylinder is fixedly connected to the housing.

[0022] Another object of the present invention is to provide a coal mining method, comprising the following steps:

[0023] In raw coal mining, the auxiliary drum is driven to extend from the groove through the telescopic mechanism and extends to the furthest point from the machine body. Then, the raw coal in the thin coal seam is mined through the auxiliary drum.

[0024] Gangue extraction is carried out by a telescopic mechanism that drives the auxiliary drum to retract into the groove. The two main drums then extract gangue from the top and bottom of the thin coal seam until the gangue layer is level with the thin coal seam, providing space for the coal mining machine to feed.

[0025] The process involves two steps: mining raw coal and collecting gangue.

[0026] In summary, the present invention has the following advantages compared to the prior art:

[0027] 1. This invention uses a secondary drum to collect raw coal from a thin coal seam and two main drums to collect gangue from the top and bottom of the thin coal seam, enabling the separate mining of raw coal and gangue using a coal mining machine.

[0028] 2. The present invention uses two hydraulic cylinders to ensure more stable extension and retraction of the auxiliary roller;

[0029] 3. The present invention can store the box body and the auxiliary roller by setting grooves. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0031] Figure 2 This is a schematic diagram illustrating the telescopic mechanism in an embodiment.

[0032] In the diagram: 1. Machine body; 2. Rocker arm; 3. Main drum; 4. Auxiliary drum; 5. Housing; 6. Hydraulic cylinder; 7. Power mechanism; 8. Transmission mechanism; 9. Output shaft. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0034] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0035] Example: A coal mining machine used for coal and gangue separation mining, see attached document. Figure 1 and attached Figure 2The system includes a machine body 1, two rocker arms 2 rotatably connected to both ends of the machine body 1, a main roller 3 rotatably connected to the side of the two rocker arms 2 near the coal wall, an auxiliary roller 4 located on the side of the machine body 1 near the coal wall, and a telescopic mechanism for driving the rollers to extend and retract into the machine body 1. Specifically, the diameter of the main roller 3 is greater than the thickness of the thin coal seam; the axis of the auxiliary roller 4 is horizontal and perpendicular to the length direction of the machine body 1, and the axes of the two main rollers 3 are parallel to the axis of the auxiliary roller 4; when the auxiliary roller 4 extends the farthest from the machine body 1, the distance between the end of the auxiliary roller 4 away from the machine body 1 and the side of the machine body 1 near the coal wall is greater than the distance between the end of the main roller 3 near the coal wall and the side of the machine body 1 near the coal wall.

[0036] When mining raw coal in a thin coal seam, the telescopic mechanism drives the auxiliary drum 4 to extend from the machine body 1 to its furthest position. The auxiliary drum 4 then enters the thin coal seam for mining. Because the distance between the end of the auxiliary drum 4 furthest from the machine body 1 and the side of the machine body 1 closest to the coal wall is greater than the distance between the end of the main drum 3 closest to the coal wall and the side of the machine body 1 closest to the coal wall, the auxiliary drum 4 effectively mines raw coal in the thin coal seam. At the beginning, the main drum 3 will not come into contact with the gangue. As mining progresses, the distance between the main drum 3 and the coal face will shorten. When the main drum 3 is close to the coal face, the auxiliary drum 4 will be retracted into the machine body 1 through the telescopic mechanism. The two main drums 3 will collect the gangue from the top and bottom of the thin coal seam until the gangue is level with the thin coal seam. Then the auxiliary drum 4 will extend again to mine the thin coal seam. The auxiliary drum 4 can be used to collect raw coal and gangue separately, so that there is no need to separate the gangue and raw coal afterward.

[0037] Specifically, this embodiment also includes a housing 5, an auxiliary roller 4 is disposed on the housing 5, and the auxiliary roller 4 is disposed on the side of the housing 5 near the coal wall.

[0038] Specifically, this embodiment also includes a power mechanism 7 and a transmission mechanism 8 disposed within the housing 5. The power mechanism 7 is disposed within the housing 5 and located near the end of the housing 5 away from the coal wall; the transmission mechanism 8 is located within the housing 5 and is connected to the power mechanism 7 in a transmission manner. Specifically, an output shaft 9 is disposed at the end of the housing 5 near the coal wall. One end of the output shaft 9 extends into the housing 5 and is connected to the transmission mechanism 8 within the housing 5 in a transmission manner. The auxiliary roller 4 is sleeved on the outside of the output shaft 9 and is fixedly connected to the output shaft 9.

[0039] The power mechanism 7 drives the output shaft 9 to rotate through the transmission mechanism 8, which in turn drives the auxiliary drum 4 to rotate, thus enabling the mining of thin coal seams.

[0040] Specifically, in this embodiment, the power mechanism 7 is set as a motor, and the transmission mechanism 8 is composed of multiple gears that mesh with each other in sequence. The first-stage gear is connected to the motor for transmission, and the last-stage gear is connected to the output shaft 9 for transmission. By adjusting the gear ratio, the transmission mechanism 8 can achieve the effect of deceleration.

[0041] Specifically, in this embodiment, the telescopic mechanism is configured as a hydraulic cylinder 6, which is fixed to the machine body 1. The extension and retraction of the piston rod of the hydraulic cylinder 6 can drive the auxiliary roller 4 to extend and retract. Specifically, the cylinder body of the hydraulic cylinder 6 is fixed to the machine body 1, and the piston rod of the hydraulic cylinder 6 is fixed to the housing 5. Specifically, the telescopic mechanism is configured with two hydraulic cylinders 6, which simultaneously drive the housing 5 to extend and retract, making the extension and retraction of the housing 5 more stable.

[0042] Specifically, a groove is provided on the side of the machine body 1 near the coal wall, and the oil cylinders 6 are all set in the groove. The two oil cylinders 6 can drive the box body 5 and the auxiliary roller 4 to be completely stored in the groove. The groove can store the box body 5 and the auxiliary roller 4, so that after the machine body 1 has completed the storage of the box body 5 and the auxiliary roller 4, the auxiliary roller 4 will not come into contact with the coal wall when the main roller 3 is working.

[0043] The working principle of this coal mining machine used for coal and gangue mining is as follows: When mining raw coal in a thin coal seam, the telescopic mechanism drives the auxiliary drum 4 to extend from the machine body 1, reaching its furthest position. The auxiliary drum 4 is then inserted into the thin coal seam for raw coal mining. Because the distance between the end of the auxiliary drum 4 furthest from the machine body 1 and the side of the machine body 1 closest to the coal wall is greater than the distance between the end of the main drum 3 closest to the coal wall and the side of the machine body 1 closest to the coal wall, the auxiliary drum 4... When the drum 4 is collecting raw coal in the thin coal seam, the main drum 3 will not come into contact with the gangue. As the mining progresses, the distance between the main drum 3 and the coal wall shortens. When the main drum 3 is close to the coal wall, the auxiliary drum 4 is retracted into the machine body 1 through the telescopic mechanism. The two main drums 3 collect gangue from the top and bottom of the thin coal seam until the gangue is level with the thin coal seam. Then the auxiliary drum 4 extends again to mine the thin coal seam. The auxiliary drum 4 can be set up to collect raw coal and gangue separately, so that there is no need to separate the gangue and raw coal afterward.

[0044] Example 2: A coal mining method, comprising the following steps:

[0045] In the raw coal mining process, the auxiliary drum 4 is extended from the groove through the telescopic mechanism and extends to the furthest point from the machine body 1. Then, the raw coal in the thin coal seam is mined through the auxiliary drum 4.

[0046] Gangue extraction is carried out by the telescopic mechanism driving the auxiliary drum 4 to retract into the groove. The two main drums 3 are used to mine the gangue at the top and bottom of the thin coal seam until the gangue layer is level with the thin coal seam to provide space for the coal mining machine to feed.

[0047] The process involves two steps: mining raw coal and collecting gangue.

[0048] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A coal mining machine used for coal and gangue separation mining, characterized in that: Including the fuselage (1); Two rocker arms (2) are provided and are rotatably connected to both ends of the body (1); The main drum (3) has two parts and is rotatably connected to the two rocker arms (2) on the side near the coal wall. The diameter of the main drum (3) is greater than the thickness of the thin coal layer. The auxiliary drum (4) is located on the side of the machine body (1) near the coal wall. The axis of the auxiliary drum (4) is horizontal and perpendicular to the length direction of the machine body (1). The axes of the two main drums (3) are parallel to the axis of the auxiliary drum (4). And a telescopic mechanism, which is used to push the auxiliary drum (4) to extend and retract into the machine body (1). When the auxiliary drum (4) extends the farthest from the machine body (1), the distance between the end of the auxiliary drum (4) away from the machine body (1) and the side of the machine body (1) close to the coal wall is greater than the distance between the end of the main drum (3) close to the coal wall and the side of the machine body (1) close to the coal wall. When the two main drums (3) are close to the coal wall, the telescopic mechanism drives the auxiliary drum (4) to retract into the machine body (1), and the two main drums (3) collect gangue from the top and bottom of the thin coal seam. The box body (5) and the auxiliary roller (4) are set on the box body (5). The telescopic mechanism directly drives the box body (5) to move. The machine body (1) is provided with a groove on the side near the coal wall. The telescopic mechanism is set in the groove. The telescopic mechanism can drive the box body (5) and the auxiliary roller (4) to retract into the groove.

2. A coal mining machine for coal and gangue separation according to claim 1, characterized in that: It also includes a power mechanism (7), which is installed inside the housing (5); And a transmission mechanism (8), which is located inside the housing (5) and is connected to the power mechanism (7) in a transmission manner. The transmission mechanism (8) is connected to the auxiliary roller (4) in a transmission manner.

3. A coal mining machine for coal and gangue separation according to claim 2, characterized in that: It also includes an output shaft (9), which is located at one end of the housing (5) where the auxiliary roller (4) is set. One end of the auxiliary roller (4) extends into the housing (5) and is connected to the transmission mechanism (8). The auxiliary roller (4) is sleeved on the outside of the output shaft (9) and is driven to rotate by the output shaft (9).

4. A coal mining machine for coal and gangue separation according to claim 3, characterized in that: The telescopic mechanism is a hydraulic cylinder (6), which drives the box (5) to extend and retract.

5. A coal mining machine for coal and gangue separation according to claim 4, characterized in that: The telescopic mechanism includes two hydraulic cylinders (6).

6. A coal mining machine for coal and gangue separation according to claim 5, characterized in that: The transmission mechanism (8) consists of multiple gears, which mesh with each other in sequence.

7. A coal mining machine for coal and gangue separation according to claim 6, characterized in that: The cylinder body of the hydraulic cylinder (6) is fixed on the machine body (1), and the piston rod of the hydraulic cylinder (6) is fixedly connected to the housing (5).

8. A coal mining method using a coal mining machine according to any one of claims 1-7, characterized in that: Includes the following steps: In the raw coal mining, the auxiliary drum (4) is driven to extend out of the groove through the telescopic mechanism and the auxiliary drum (4) extends to the farthest distance from the machine body (1). Then, the raw coal in the thin coal seam is mined through the auxiliary drum (4). Gangue collection: The auxiliary drum (4) is retracted into the groove by the telescopic mechanism, and the gangue at the top and bottom of the thin coal seam is mined by the two main drums (3) until the gangue layer is level with the thin coal seam to provide space for the coal mining machine to feed. The process involves two steps: mining raw coal and collecting gangue.

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