Ultrathin coal seam coal mining machine

Abstract

The utility model discloses an ultra-thin coal seam coal mining machine which is used for mining coal on a coal wall and conveying mined coal briquettes to a designated area through a scraper conveyor. The ultrathin coal seam mining machine comprises an electric cabinet, a left traction part and a right traction part which are respectively arranged at the left end and the right end of the electric cabinet, a left rocker arm and a right rocker arm which are respectively arranged on the left traction part and the right traction part, and a left roller and a right roller which are respectively arranged on the left rocker arm and the right rocker arm, the left rocker arm and the right rocker arm are respectively arranged above the scraper conveyor in a crossing manner, so that the space above the scraper conveyor is fully utilized, the space between the left roller and the right roller is prevented from being occupied by the left rocker arm, the right rocker arm and internal structures of the left rocker arm and the right rocker arm, and a machine passing channel does not need to be cut in advance when the coal mining machine is used; the problem that the lifting height of the rocker arm located behind is limited by coal left above the coal mining machine does not exist, it is guaranteed that the range of the whole mining height of the coal mining machine at a time is larger, and the application scene and the coal mining efficiency of the coal mining machine are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal shearers, and in particular relates to an ultra-thin coal seam coal shearer. Background Art

[0002] Coal resources are an important pillar of my country's energy industry. In order to realize the mining of coal resources, coal mining machines have become a widely used mining tool. In order to adapt to the mining needs of coal seams of different thicknesses, there are coal mining machines of various structures or specifications in the existing technology.

[0003] In the prior art, a Chinese patent application with application number 2022102364064 and application date of March 10, 2022 discloses a high-power ultra-thin coal seam mining machine, which adopts a layout combining a semi-suspended traction part and a front fully-suspended rocker arm, solving the contradiction between coal passing space, installed power and machine face height, and improving the cutting power and compressing the thickness of the machine body above the coal passing space. At the same time, it also increases the coal passing space, and realizes that the installed power reaches 830kW while meeting the minimum mining height of 0.9m, while ensuring that the coal passing space is greater than 250mm.

[0004] However, in this prior art, the placement of the cutting motor behind the drum requires the front drum to cut low, creating a pre-cut channel. The coal seam left behind when the front drum cuts low limits the height at which the rear rocker arm can rise, limiting the range of heights that this shearer with a suspended body can accommodate. Furthermore, the suspended body structure reduces the shearer's adaptable angles, limiting its applicable mining scenarios. Summary of the Invention

[0005] The present invention is made to solve the above problems, and its purpose is to provide an ultra-thin coal seam coal shearer, which solves the shortcomings of the ultra-thin coal seam coal shearer in the existing technology that it can adapt to a small mining height range and a small mining angle.

[0006] The present invention provides an ultra-thin coal seam mining machine, which is used for mining coal walls and transporting the mined coal blocks to a designated area through a scraper conveyor. The ultra-thin coal seam mining machine includes: an electric control box, a left traction part and a right traction part respectively installed at the left and right ends of the electric control box, a left rocker arm and a right rocker arm respectively installed on the left traction part and the right traction part, and a left roller and a right roller respectively installed on the left rocker arm and the right rocker arm. The left rocker arm and the right rocker arm are respectively arranged across the top of the scraper conveyor to increase the full height range of the left roller and the right roller that can be mined at one time.

[0007] Preferably, the left traction part and the right traction part respectively include a traction part shell, a traveling mechanism movably arranged on the other side of the scraper conveyor away from the coal wall, and a traction motor and a traction transmission mechanism located in the traction part shell and transmission-connected. The output end of the traction motor is arranged toward the traveling mechanism. The traction transmission mechanism includes a traction part planetary reducer transmission-connected to the traveling mechanism. The traction part planetary reducer is arranged side by side with the traction motor and is connected through a transmission assembly so that the two form a roughly L-shaped structure.

[0008] Preferably, the traction motor and the traction part planetary reducer are arranged close to the left roller and the right roller, so that the left traction part and the right traction part remain mostly located in the vertical space above the scraper conveyor, thereby avoiding the left traction part and the right traction part protruding into the area between the left roller and the right roller.

[0009] Preferably, the electric control box is provided with a fully automatic control system, an inertial navigation system and an airborne medium voltage frequency conversion technology to reduce the length of the electric control box so that the ultra-thin coal seam shearer can adapt to undulating working surfaces.

[0010] Preferably, one end of the traction part housing close to the coal wall is connected to the scraper conveyor via a supporting sliding shoe assembly, and the supporting sliding shoe assembly is a riding shovel plate structure.

[0011] Preferably, the center of gravity of the ultra-thin coal seam shearer is set in the chute of the scraper conveyor to increase the mining angle range of the shearer.

[0012] Preferably, the left rocker arm and the right rocker arm respectively include a rocker arm housing and a cutting motor and a cutting transmission mechanism located in the rocker arm housing. The cutting motor is arranged across the scraper conveyor, and the cutting transmission mechanism is connected to the corresponding left roller or the right roller by the end face of the cutting motor close to the coal wall side, and the cutting motor and the cutting transmission mechanism are kept from protruding into the area between the left roller and the right roller.

[0013] Preferably, the cutting motors in the left drum and the right drum respectively use two low-power motors to drive the corresponding left drum or right drum to mine coal.

[0014] Preferably, the cutting transmission mechanism includes a first gear transmission mechanism, a cutting part planetary reducer, a second gear transmission mechanism and a spline shaft that are sequentially connected in transmission. The output end of the spline shaft is the roller power input end. The left roller and the right roller are respectively installed on the corresponding output ends of the spline shaft through roller connecting sleeves. The left roller and the right roller are small-diameter and high-loading rate rollers.

[0015] Preferably, the diameters of the left drum and the right drum are 750 mm, so that the mining height range of the ultra-thin coal seam shearer is 0.8-1.5 m.

[0016] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0017] The positive progress effect of the present invention is:

[0018] According to the ultra-thin coal seam coal mining machine involved in the present invention, by arranging the left rocker arm and the right rocker arm across the scraper conveyor, the space above the scraper conveyor is fully utilized to avoid the left rocker arm and the right rocker arm and their internal structures occupying the space between the left roller and the right roller. When the coal mining machine is used, there is no need to cut out a machine passage in advance, and the coal left above the coal mining machine does not limit the rising height of the rocker arm at the rear, ensuring that the coal mining machine has a larger range of full height mining at one time, thereby improving the application scenarios and coal mining efficiency of the coal mining machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view of an ultra-thin coal seam shearer according to an embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of an ultra-thin coal seam shearer and a scraper conveyor in an embodiment of the present invention.

[0021] Figure 3 It is a schematic planar structural diagram of an ultra-thin coal seam shearer in an embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the internal structure of the left traction part (right traction part) in an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the middle end face of the ultra-thin coal seam shearer in an embodiment of the present invention.

[0024] Figure 6 Schematic diagram of the center of gravity position of the ultra-thin coal seam shearer in an embodiment of the present invention.

[0025] Figure 7 Schematic diagram of the internal structure of the left rocker arm (right rocker arm) in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0027] <Example>

[0028] like Figures 1 to 3As shown, this embodiment provides an ultra-thin coal seam mining machine 100 for mining the coal wall of a coal mountain (not shown in the figure), and transporting the mined coal blocks to a designated area, such as the outside of the coal mountain, through a scraper conveyor 200 (only part of the structure is shown in the figure).

[0029] like Figures 1 to 3 As shown, the ultra-thin coal seam shearer 100 includes: an electric control box 10, a left traction part 20, a right traction part 30, a left rocker arm 40, a right rocker arm 50, a left roller 60 and a right roller 70.

[0030] The electrical control box 10 is located in the center of the entire coal shearer 100. The left traction unit 20 and the right traction unit 30 are mounted on the left and right ends of the electrical control box 10, respectively. The left rocker arm 40 and the right rocker arm 50 are mounted on the left traction unit 20 and the right traction unit 30, respectively. The left roller 60 and the right roller 70 are mounted on the left rocker arm 40 and the right rocker arm 50, respectively. Based on this connection structure, when the coal shearer 100 is operating, the left roller 60 and the right roller 70 are located at the front and rear of the travel path of the coal shearer 100, respectively, thereby respectively mining the upper and lower areas of the coal wall.

[0031] The left rocker arm 40 and the right rocker arm 50 are respectively arranged across the top of the scraper conveyor 200, so that the left rocker arm 40 and the right rocker arm 50 fully utilize the space above the scraper conveyor 200, and avoid the left rocker arm 40 and the right rocker arm 50 and their internal structures from occupying the space between the left roller 60 and the right roller 70, ensuring that there is no interference structure between the left roller 60 and the right roller 70. When using the ultra-thin coal seam shearer 100 of this structure, there is no need to cut a machine passage in advance, and the coal left above the shearer does not limit the raising height of the rocker arm located at the rear. Therefore, during the coal mining process, the full height range of the left roller 60 and the right roller 70 is increased, which can be applied to a wider range of application scenarios and improve coal mining efficiency. In a preferred embodiment, the diameter of the left roller 60 and the right roller 70 is set to 750 mm. At this time, the mining height range of the ultra-thin coal seam shearer 100 can reach 0.8-1.5 m.

[0032] like Figure 3 As shown, the left traction part 20 and the right traction part 30 are symmetrical structures with the same structure, and are respectively arranged on the left and right sides of the electric control box 10. In a specific embodiment, the structure is described by taking the left traction part 20 as an example.

[0033] like Figure 4 As shown, the left traction part 20 and the right traction part 30 respectively include a traction part shell 21, a walking mechanism 22 movably arranged on the other side of the scraper conveyor 200 away from the coal wall, and a traction motor 23 and a traction transmission mechanism 24 located in the traction part shell 21 and transmission connected.

[0034] In addition, the output end of the traction motor 23 is arranged toward the traveling mechanism 22, and the traction transmission mechanism 24 includes a traction part planetary reducer 241 that is transmission-connected to the traveling mechanism 22. The traction part planetary reducer 241 is arranged side by side with the traction motor 23 and is connected through a transmission assembly 242, so that the traction motor 23 and the traction part planetary reducer 241 form a roughly L-shaped structure, thereby increasing the coal passing space 300 between the coal mining machine 100 and the scraper conveyor 200, and improving the efficiency of coal mining and coal transportation.

[0035] Furthermore, if Figure 2 As shown, the traction motor 23 and the traction part planetary reducer 241 are arranged close to the left roller 60 and the right roller 70, so that the left traction part 20 and the right traction part 30 remain mostly located in the vertical space above the scraper conveyor 200, and the parts of the left traction part 20 and the right traction part 30 protruding from the outside of the trough of the scraper conveyor 200 are also avoided from protruding into the area between the left roller 60 and the right roller 70, preventing interference with the mining height range of the left roller 60 and the right roller 70, thereby ensuring that the mining height range is maximized at one time.

[0036] In a specific embodiment, the electric control box 10 is provided with a fully automatic control system, an inertial navigation system and an onboard medium voltage frequency conversion technology, thereby effectively reducing the length of the electric control box 10 so that the ultra-thin coal seam shearer 100 can better adapt to the undulating working surface.

[0037] like Figure 5 As shown, in one embodiment, the end of the traction unit housing 21 near the coal wall is connected to the scraper conveyor 200 via a support shoe assembly 25. The support shoe assembly 25 can be configured as a riding shovel plate structure, i.e., a structure that cooperates with the shovel plate of the scraper conveyor 200. This eliminates the need for a riding bottom plate structure (i.e., a climbing bottom plate shearer), thus resolving the issue of a riding bottom plate structure requiring high bottom plate hardness and flatness.

[0038] like Figure 6 As shown, in a specific embodiment, for the ultra-thin coal seam coal mining machine 100, the center of gravity 80 of the entire machine is set in the chute of the scraper conveyor 200 to avoid the risk of the coal mining machine tipping over during downward mining, thereby increasing the downward mining angle range of the coal mining machine and improving the adaptability of the coal mining machine to the downward mining working surface.

[0039] like Figure 1 and Figure 3 As shown, the left rocker arm 40 and the right rocker arm 50 have the same internal structure, and are only arranged in different directions to simultaneously mine coal in the upper area and the lower area. In a specific embodiment, the structure of the left rocker arm 40 is described as an example.

[0040] like Figure 7As shown, the left rocker arm 40 and the right rocker arm 50 respectively include a rocker arm housing 41 and a cutting motor 42 and a cutting transmission mechanism 43 located within the rocker arm housing 41. The cutting motor 42 is arranged across the scraper conveyor 200, and the cutting transmission mechanism 43 is connected to the corresponding left roller 60 or right roller 70 by the end face of the cutting motor 43 close to the coal wall, thereby driving the left roller 60 or right roller 70 to rotate to achieve coal mining. Here, the cutting motor 42 and the cutting transmission mechanism 43 are arranged close to the outer side of the trough of the scraper conveyor 200, so as to avoid the cutting motor 42 and the cutting transmission mechanism 43 protruding into the area between the left roller 60 and the right roller 70, preventing interference with the mining height range of the left roller 60 and the right roller 70, thereby ensuring the maximum mining height range at one time.

[0041] Preferably, the cutting motors 42 within the left and right drums 60 and 70 can each utilize two low-power motors to drive the corresponding left and right drums 60 and 70 for coal mining. Compared to a single high-power motor, this effectively reduces the space occupied by the cutting motors 42 above the scraper conveyor 200, ensuring a relatively low overall height for the shearer 100 while increasing the coal-passing space between the shearer 100 and the scraper conveyor 200, effectively improving coal mining efficiency. For example, in this solution, using two 125kW cutting motors effectively reduces the space occupied above the scraper conveyor compared to using a single 250kW cutting motor.

[0042] Specifically, the cutting drive mechanism 43 comprises a first gear transmission mechanism, a planetary reducer for the cutting section, a second gear transmission mechanism, and a spline shaft, which are sequentially connected. The output end of the spline shaft serves as the drum power input. The left and right drums 60 and 70 are mounted on the corresponding spline shaft output ends via drum connectors. The left and right drums 60 and 70 are small-diameter, high-load-rate drums. Setting the diameter of the left and right drums 60 and 70 to 750 mm allows the ultra-thin coal seam shearer 100 to achieve a mining height range of 0.8-1.5 m.

[0043] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. An ultra-thin coal seam shearer for mining coal from a coal wall and transporting the mined coal blocks to a designated area via a scraper conveyor, the ultra-thin coal seam shearer comprising: An electric control box, a left traction unit and a right traction unit respectively mounted on the left and right ends of the electric control box, a left rocker arm and a right rocker arm respectively mounted on the left traction unit and the right traction unit, and a left roller and a right roller respectively mounted on the left rocker arm and the right rocker arm, characterized in that: The left rocker arm and the right rocker arm are respectively arranged across the top of the scraper conveyor to increase the range of the left roller and the right roller to mine the full height at one time.

2. The ultra-thin coal seam shearer according to claim 1, characterized in that: The left traction part and the right traction part respectively include a traction part housing, a traveling mechanism movably arranged on the other side of the scraper conveyor away from the coal wall, and a traction motor and a traction transmission mechanism located in the traction part housing and transmission-connected. The output end of the traction motor is arranged toward the traveling mechanism, and the traction transmission mechanism includes a traction part planetary reducer that is transmission-connected to the traveling mechanism. The traction part planetary reducer is arranged side by side with the traction motor and is connected through a transmission assembly so that a roughly L-shaped structure is formed between the two.

3. The ultra-thin coal seam shearer according to claim 2, characterized in that: The traction motor and the traction part planetary reducer are arranged close to the left roller and the right roller so that the left traction part and the right traction part remain mostly located in the vertical space above the scraper conveyor, thereby avoiding the left traction part and the right traction part protruding from the area between the left roller and the right roller.

4. The ultra-thin coal seam shearer according to claim 1, characterized in that: The electric control box is equipped with a full-automatic control system, an inertial navigation system and an onboard medium-voltage frequency conversion technology to reduce the length of the electric control box so that the ultra-thin coal seam shearer can adapt to undulating working surfaces.

5. The ultra-thin coal seam shearer according to claim 2, characterized in that: One end of the traction part housing close to the coal wall is connected to the scraper conveyor via a supporting sliding shoe assembly, and the supporting sliding shoe assembly is a riding shovel plate structure.

6. The ultra-thin coal seam shearer according to claim 1, characterized in that: The center of gravity of the ultra-thin coal seam shearer is arranged in the chute of the scraper conveyor to increase the shearing angle range of the shearer.

7. The ultra-thin coal seam shearer according to claim 2, characterized in that: The left rocker arm and the right rocker arm respectively include a rocker arm housing and a cutting motor and a cutting transmission mechanism located in the rocker arm housing. The cutting motor is arranged across the scraper conveyor. The cutting transmission mechanism is connected to the corresponding left roller or the right roller by the end face of the cutting motor close to the coal wall side, and the cutting motor and the cutting transmission mechanism are kept from protruding out of the area between the left roller and the right roller.

8. The ultra-thin coal seam shearer according to claim 7, characterized in that: The cutting motors in the left drum and the right drum respectively use two low-power motors to drive the corresponding left drum or the right drum to mine coal.

9. The ultra-thin coal seam shearer according to claim 7, characterized in that: The cutting transmission mechanism includes a first gear transmission mechanism, a cutting part planetary reducer, a second gear transmission mechanism and a spline shaft that are sequentially connected. The output end of the spline shaft is the roller power input end. The left roller and the right roller are respectively installed on the corresponding output ends of the spline shaft through roller connecting sleeves. The left roller and the right roller are small-diameter and high-loading rate rollers.

10. The ultra-thin coal seam shearer according to claim 9, characterized in that: The diameters of the left drum and the right drum are 750 mm, so that the mining height range of the ultra-thin coal seam shearer is 0.8-1.5 m.

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