Coal picking device and coal mining machine

Abstract

The invention provides a coal picking device which is arranged in a coal mining machine and used for cleaning float coal on the coal wall side of a working face, the coal mining machine is ridden on a scraper conveyor, and the coal picking device comprises a base frame and a rotating disc. The base frame is connected between an electric cabinet and a traction part of the coal mining machine so as to enable the base frame to be located above the scraper conveyer, the rotary table is arranged on the coal wall side, and an angle is formed between the rotary table and the base frame so as to convey float coal into a middle groove of the scraper conveyer. The rotary table is arranged on the coal wall side of the scraper conveyor, in the walking process of the coal mining machine, float coal on the coal wall side is conveyed to the middle groove of the scraper conveyor through rotation of the rotary table, cleaning of the float coal on the coal wall side is achieved, and the float coal left after coal breaking of a front roller of the coal mining machine can be completely cleaned theoretically. And the coal loading effect and the production efficiency of the coal mining machine for the thin seam working face are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining machines, and in particular relates to a coal picking device and a coal mining machine comprising the coal picking device. Background Art

[0002] Coal mining machine, scraper conveyor and hydraulic support are three important equipment in the comprehensive mining face of underground coal mines. The coal mining machine rides on top of the scraper conveyor and cuts coal and rock by moving back and forth to achieve coal mining.

[0003] In order to achieve the left and right bidirectional coal cutting of the coal mining machine and the adjustment needs of different mining heights, longwall coal mining machines often adopt a double-drum symmetrical arrangement. The left and right drums cut the coal wall to form coal blocks, and then load them into the middle groove of the scraper conveyor. The drum is mainly composed of a cylinder, blades and picks. The cylinder is installed in the rocker cutting part to play a supporting role. The picks are arranged at a certain angle on the top of the blades to cut coal and rock. The blades often adopt a multi-head blade spiral arrangement to guide the coal blocks cut by the picks into the middle groove of the scraper conveyor on the goaf side to play a coal loading role. The drum coal loading effect is directly related to the arrangement angle and diameter of the blades, and usually deteriorates as the blade height decreases. As the mining height of the coal seam decreases, the size of the drum diameter is limited, and the diameter of the rocker cutting mechanism and the size of the pick are difficult to compress. Therefore, the blades are often very small, difficult to play a coal loading role, and the coal loading effect is very poor.

[0004] Improving the coal loading effect has always been a difficult problem for thin coal seam working faces. In actual mining, workers can only rely on manual cleaning or use the scraper conveyor shovel to shovel the floating coal into the middle trough, which has limited effect. When a large amount of floating coal is piled on the coal wall side of the working face, it will cause very large resistance to the coal mining machine, affecting the running speed of the coal mining machine. In addition, the poor coal loading effect of coal blocks also greatly reduces the mining efficiency of the working face. Therefore, solving the coal loading effect of the working face, especially the thin coal seam working face, is of great significance to improving the production efficiency of the mine. Summary of the invention

[0005] The purpose of the present invention is to address the shortcomings of the prior art and provide a coal picking device and a coal mining machine including the coal picking device. The coal picking device can realize two-way coal picking along the working direction of the coal mining machine. In theory, it can completely clean the floating coal left after the front drum breaks the coal, greatly improving the coal loading effect and production efficiency of the coal mining machine in the thin coal seam working face.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a coal picking device, which is arranged in a coal mining machine and is used to clean floating coal on the coal wall side of a working face. The coal mining machine rides on a scraper conveyor. The coal picking device includes a base frame and a turntable. The base frame is connected between an electric control box and a traction part of the coal mining machine so that the base frame is located above the scraper conveyor. The turntable is arranged on the side of the coal wall and is arranged at an angle to the base frame to transport the floating coal to the middle groove of the scraper conveyor.

[0008] Preferably, the base frame includes a first frame and a second frame connected to each other, the first frame is located above the second frame, the first frame and the second frame are respectively arranged flush with the top surface and the bottom surface of the body of the coal mining machine, the second frame is a hollow structure, the turntable is arranged at one end of the second frame close to the coal wall side, and a first coal drop port is formed between the first frame and the second frame and on one side close to the turntable, and the floating coal cleaned by the turntable enters the middle groove of the scraper conveyor through the first coal drop port.

[0009] Preferably, the base frame also includes a mounting frame arranged on the coal wall side and connected to the second frame. The mounting frame is triangular in shape and has a mounting slope for mounting the turntable. An accommodating space is formed below the mounting slope for setting the power system and control system of the turntable.

[0010] Preferably, the first frame is a hollow structure, so that a second coal drop opening penetrating the first frame and the second frame is formed above the scraper conveyor to clean the dropped coal on the coal mining machine body.

[0011] Preferably, the coal picking device further comprises a coal guiding assembly, wherein the coal guiding assembly is connected to the bottom of the mounting frame and is used for guiding the floating coal into the rotating disk.

[0012] Preferably, there are multiple coal guide assemblies, which are arranged at least on both sides of the mounting frame along the travel direction of the coal mining machine.

[0013] Preferably, the turntable includes two or more identical blades, and the floating coal is transported by the rotation of the blades.

[0014] Preferably, the coal picking device further comprises a supporting sliding shoe, and the supporting sliding shoe is arranged at the bottom of the shovel plate of the mounting frame facing the scraper conveyor to support the coal picking device.

[0015] In addition, the present invention also provides a coal mining machine, which uses the coal picking device described in any of the above-mentioned schemes, and the coal mining machine includes a left drum, a left rocker arm, a left traction part, an electric control box, a right traction part, a right rocker arm and a right drum connected in sequence, and the coal picking device is fixedly connected between the left traction part and the electric control box.

[0016] Preferably, the coal mining machine further comprises a long screw, which fixes the left traction part, the base frame of the coal picking device, the electric control box and the right traction part into one.

[0017] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0018] The positive and progressive effects of the present invention are:

[0019] According to the coal picking device and coal mining machine involved in the present invention, a turntable is set on the coal wall side of the scraper conveyor. During the movement of the coal mining machine, the floating coal on the coal wall side is transported to the middle groove of the scraper conveyor through the rotation of the turntable, thereby realizing the cleaning of the floating coal on the coal wall side. In theory, the floating coal left after the front roller of the coal mining machine breaks the coal can be completely cleaned, greatly improving the coal loading effect and production efficiency of the coal mining machine on the thin coal seam working face. In addition, the coal picking device can fully adapt to the existing longwall coal mining machine mining process and structure, and can be selected according to different machine models. It is convenient and simple to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a coal mining machine and a scraper conveyor in an embodiment of the present invention.

[0021] Figure 2 It is a top view of the structural relationship between the coal mining machine and the coal picking device in the embodiment of the present invention.

[0022] Figure 3 yes Figure 2 Cross-section along the AA direction.

[0023] Figure 4 yes Figure 3 Schematic diagram of the observation along the K direction.

[0024] Figure 5 The conveying direction of the coal picking device and the traveling direction of the coal mining machine in the embodiment of the present invention are schematically shown. Figure 1 .

[0025] Figure 6 The conveying direction of the coal picking device and the traveling direction of the coal mining machine in the embodiment of the present invention are schematically shown. Figure 2 . DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0027] <Example>

[0028] As attached Figure 1 and Figure 2 As shown, this embodiment discloses a coal picking device 100, which is arranged in a coal mining machine 200, and is used to clean the floating coal on the coal wall side of the working face of the coal mining machine. Figure 1 As shown, the coal mining machine 200 rides on the scraper conveyor 300, that is, the coal mining machine 200 can walk along the scraper conveyor 300, and the coal blocks mined by the coal mining machine 200 are transported out of the mine through the scraper conveyor 300. Figure 2 As shown, the coal mining machine 200 includes a left drum 210, a left rocker arm 220, a left traction unit 230, an electric control box 240, a right traction unit 250, a right rocker arm 260 and a right drum 270. The left traction unit 230 and the right traction unit 250 are used to drive the coal mining machine to move as a whole, the left drum 210 and the right drum 270 are used to realize the coal mining, and the left rocker arm 220 and the right rocker arm 260 are used to adjust the coal mining height of the left drum 210 and the right drum 270 respectively.

[0029] like Figure 2 and Figure 3 As shown, the coal picking device 100 includes a base frame 10 and a rotating disk 20. Figure 2 As shown, the base frame 10 is connected between the electric control box 240 and the traction part (left traction part 230 or right traction part 250) of the coal mining machine 200, so that the base frame 10 is located directly above the scraper conveyor 300, so that floating coal and the like can fall into the middle groove of the scraper conveyor 300 through the base frame 10, thereby realizing coal transportation. The turntable 20 is arranged on the coal wall side of the coal mining machine 200, and is arranged at an angle with the base frame 10, that is, the turntable 20 is arranged to be inclined upward from the ground, so that the floating coal is transported to the middle groove of the scraper conveyor 300 through the base frame 10.

[0030] Specifically, Figure 3 As shown, the base frame 10 includes a first frame 11 and a second frame 12 that are connected to each other. The first frame 11 is located above the second frame 12. The first frame 11 and the second frame 12 are respectively flush with the top surface 201 and the bottom surface 202 of the body of the coal mining machine 200, and their butt joints are matched with the shapes of the butt joints of the traction part and the electric control box. The second frame 12 is a hollow structure. The turntable 20 is disposed at one end of the second frame 12 close to the coal wall. A first coal drop port 13 is formed in the longitudinal space between the first frame 11 and the second frame 12 and close to one side of the turntable 20. The first coal drop port 13 is located in the middle area of ​​the base frame 10, as shown in FIG. Figure 3As shown by the dotted arrow in the direction of the middle coal flow, the floating coal cleaned by the turntable 20 enters the middle trough of the scraper conveyor 300 through the first coal drop port 13 .

[0031] Another example Figure 3 As shown, the base frame 10 also includes a mounting frame 14. The mounting frame 14 is triangular in shape, arranged on the side of the coal wall and connected to the second frame 12. It has a mounting slope 141 for mounting the turntable 20. A receiving space 142 is formed below the mounting slope 141 for setting the power system 21 and the control system 22 of the turntable 20. The power system 21 can drive the turntable 20 to rotate by electric or hydraulic drag according to the power of the coal mining machine. The control system 22 adjusts the output of the power system 21 according to different working conditions such as the direction, speed, and amount of coal of the coal mining machine, thereby adjusting the start, stop, speed and direction of the turntable 20 to achieve the best floating coal cleaning effect.

[0032] In a specific embodiment, the first frame 11 is also a hollow structure, so that a second coal drop opening 15 is formed directly above the scraper conveyor 300. The second coal drop opening 15 is set through the first frame 11 and the second frame 12, that is, it is set through the top surface of the coal mining machine 200, and is used to clean the coal dropped on the body of the coal mining machine 200. Figure 3 As shown by the solid arrow in the direction of the middle coal flow, the fallen coal is also transported to the middle trough of the scraper conveyor 300 for transportation.

[0033] like Figure 2 and Figure 4 As shown, the turntable 20 includes two or more identical blades 23, and the floating coal is transported, that is, the loading and cleaning of the floating coal is achieved through the rotation of the blades 23.

[0034] In a specific embodiment, the coal picking device 100 further includes a coal guide assembly 30 , which is connected to the bottom of the mounting frame 14 and is tilted from the ground toward the turntable 20 , thereby guiding the floating coal on the coal wall side into the turntable 20 .

[0035] Preferably, there are multiple coal guide assemblies 30, which are arranged at least on both sides of the mounting frame 14 along the traveling direction of the coal mining machine 200, so as to realize two-way coal picking. Figure 5 and Figure 6 As shown, the coal picking direction of the turntable 20 can be matched and set according to the different travel directions of the coal mining machine 200 to meet the coal picking function in different coal mining environments.

[0036] In a preferred embodiment, the coal picking device 100 also includes a supporting shoe 40, which is arranged on the bottom of the shovel plate of the mounting frame 14 facing the scraper conveyor 300, so as to support the coal picking device 100, thereby ensuring that the coal mining machine 100 walks smoothly on the scraper conveyor 300, and at the same time ensuring the stability and effectiveness of the coal picking device 100 in picking up coal.

[0037] like Figure 2 As shown, in the coal mining machine 200 of this embodiment, the coal picking device 100 is arranged between the electric control box 240 and the left traction part 230. Of course, the coal picking device 100 can also be arranged between the electric control box 240 and the right traction part 250, and the arrangement can be matched according to the actual coal mining environment. In addition, the coal mining machine 200 also includes a plurality of long screws 203, which sequentially penetrate the left traction part 230, the base frame 10 of the coal picking device 100, the electric control box 240 and the right traction part 250, so that they are fixed into an integrated structure, and the coal picking device 100 is fixed and connected to the body of the coal mining machine 200, thereby ensuring the stability of the connection.

[0038] According to the coal picking device and the coal mining machine of the present embodiment, a turntable is arranged on the coal wall side of the scraper conveyor. When the coal mining machine is moving, the floating coal on the coal wall side is transported to the middle groove of the scraper conveyor by the rotation of the turntable, thereby realizing the cleaning of the floating coal on the coal wall side. The coal guiding and loading distances can be adjusted. In theory, the floating coal left after the front drum of the coal mining machine breaks the coal can be completely cleaned, which greatly improves the coal loading effect and production efficiency of the coal mining machine on the thin coal seam working face.

[0039] Secondly, the coal picking device is installed with a modular structure, which can fully adapt to the existing longwall coal mining machine mining process and structure. The power system operates independently and can be flexibly selected according to the working face conditions. The disassembly and installation are simple and convenient. It can be directly installed and used without additional modifications, which is convenient for underground equipment maintenance or upgrading.

[0040] In addition, the coal picking device adopts a three-step method of coal guiding-coal picking-coal dropping. The principle is simple and easy to implement. The components are reinforced and designed according to geological conditions such as the inclination and pitch angle of the working face. The structure is stable and reliable and has high reliability.

[0041] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A coal picking device, arranged in a coal mining machine, for cleaning floating coal on the coal wall side of a working face, the coal mining machine riding on a scraper conveyor, characterized in that: The coal picking device includes a base frame and a turntable. The base frame is connected between the electric control box and the traction part of the coal mining machine so that the base frame is located above the scraper conveyor. The turntable is arranged on the side of the coal wall and is arranged at an angle to the base frame to transport the floating coal to the middle groove of the scraper conveyor.

2. The coal picking device according to claim 1, characterized in that: The base frame includes a first frame and a second frame connected to each other, the first frame is located above the second frame, the first frame and the second frame are respectively arranged flush with the top surface and the bottom surface of the body of the coal mining machine, the second frame is a hollow structure, the turntable is arranged at one end of the second frame close to the coal wall side, and a first coal drop port is formed between the first frame and the second frame and on one side close to the turntable, and the floating coal cleaned by the turntable enters the middle groove of the scraper conveyor through the first coal drop port.

3. The coal picking device according to claim 2, characterized in that: The base frame also includes a mounting frame arranged on the side of the coal wall and connected to the second frame. The mounting frame is triangular in shape and has a mounting slope for mounting the turntable. A accommodating space is formed below the mounting slope for setting the power system and control system of the turntable.

4. The coal picking device according to claim 2, characterized in that: The first frame is a hollow structure, so that a second coal drop opening penetrating the first frame and the second frame is formed above the scraper conveyor to clean the dropped coal on the coal mining machine body.

5. The coal picking device according to claim 3, characterized in that: The coal picking device also includes a coal guiding assembly, which is connected to the bottom of the mounting frame and is used to guide the floating coal into the rotating disk.

6. The coal picking device according to claim 5, characterized in that: There are multiple coal guide assemblies, which are arranged at least on both sides of the mounting frame along the travel direction of the coal mining machine.

7. The coal picking device according to claim 1, characterized in that: The turntable includes two or more identical blades, and the floating coal is transported by rotating the blades.

8. The coal picking device according to claim 3, characterized in that: The coal picking device further comprises a supporting sliding shoe, and the supporting sliding shoe is arranged at the bottom of the shovel plate of the mounting frame facing the scraper conveyor to support the coal picking device.

9. A coal mining machine, using the coal picking device according to claims 1 to 8, characterized in that: The coal mining machine comprises a left drum, a left rocker arm, a left traction part, an electric control box, a right traction part, a right rocker arm and a right drum which are connected in sequence, and the coal picking device is fixedly connected between the left traction part and the electric control box.

10. The coal mining machine according to claim 9, characterized in that: The coal mining machine also includes a long screw, which fixes the left traction part, the base frame of the coal picking device, the electric control box and the right traction part into one.

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