Ultrathin coal seam coal mining machine

Abstract

The invention 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 mining machines, and in particular relates to an extremely thin coal seam coal mining machine. Background Art

[0002] Coal resources are an important pillar of my country's energy industry. In order to realize the exploitation 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 prior art.

[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, which solves the contradiction between coal passing space, installed power and machine face height, and improves the cutting power and compresses the thickness of the fuselage above the coal passing space, while also increasing the coal passing space, so as to achieve an installed power of 830kW while meeting the minimum mining height of 0.9m, while ensuring that the coal passing space is greater than 250mm.

[0004] However, in the prior art, since the cutting motor is arranged behind the drum, the front drum needs to cut low and cut out the machine passage in advance. When the front drum cuts low, the coal seam left above will limit the height of the rear rocker arm, resulting in a smaller range of mining heights that the shearer with a suspended body can adapt to. Moreover, the suspended body structure also results in a smaller angle of the shearer's adaptable downward mining, resulting in a narrower coal mining scene. Summary of the invention

[0005] The present invention is made to solve the above-mentioned problems, and aims to provide an ultra-thin coal seam coal mining machine, which solves the shortcomings of ultra-thin coal seam coal mining machines in the prior art that they can adapt to a small mining height range and a small downward 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 comprises: 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 for one mining.

[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 thereto, 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 a roughly L-shaped structure is formed between the two.

[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 from 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 onboard medium voltage frequency conversion technology to reduce the length of the electric control box so that the ultra-thin coal seam mining machine can adapt to the undulating working surface.

[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 arranged in the chute of the scraper conveyor to increase the downward 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 from 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 which 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, and 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 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.

[0017] The positive and progressive effects of the present invention are:

[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 can mine a larger range of full height 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 three-dimensional diagram of an ultra-thin coal seam shearer in an embodiment of the present invention.

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

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

[0022] Figure 4 It is a 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 It is a 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 mining machine 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 electric control box 10 is located in the middle of the entire coal mining machine 100, the left traction part 20 and the right traction part 30 are respectively installed at the left and right ends of the electric control box 10, the left rocker arm 40 and the right rocker arm 50 are respectively installed on the left traction part 20 and the right traction part 30, and the left roller 60 and the right roller 70 are respectively installed on the left rocker arm 40 and the right rocker arm 50. Based on the above connection structure, when the coal mining machine 100 performs coal mining, the left roller 60 and the right roller 70 are respectively located in front and rear of the travel channel of the coal mining machine 100, so as to mine the upper area and the lower area of ​​the coal wall respectively.

[0031] Among them, 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 make full use of the space above the scraper conveyor 200, avoid the left rocker arm 40 and the right rocker arm 50 and their internal structures occupying the space between the left roller 60 and the right roller 70, and ensure that there is no interference structure between the left roller 60 and the right roller 70. When the ultra-thin coal seam mining machine 100 of this structure is used, there is no need to cut out the machine passage in advance, and the coal left above the coal mining machine does not limit the rising height of the rocker arm located at the rear, thereby increasing the full height range of the left roller 60 and the right roller 70 in the coal mining process, which can be applied to more application scenarios and improve the coal mining efficiency. In a preferred embodiment, the diameter of the left roller 60 and the right roller 70 is set to 750mm. At this time, the mining height range of the ultra-thin coal seam mining machine 100 can reach 0.8-1.5m.

[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 implementation, the structure is specifically 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 housing 21, a traveling 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 housing 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 unit planetary reducer 241 that is transmission-connected to the traveling mechanism 22. The traction unit 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 unit 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 outside the groove side of the scraper conveyor 200 also avoid 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 mining machine 100 can better adapt to the undulating working surface.

[0037] like Figure 5 As shown, in a specific embodiment, the end of the traction part housing 21 close to the coal wall is connected to the scraper conveyor 200 through a support shoe assembly 25, and the support shoe assembly 25 can be set as a riding shovel plate structure, that is, a structure that matches the shovel plate of the scraper conveyor 200. In this way, it is not necessary to set it as a riding bottom plate structure (i.e., a climbing bottom plate coal mining machine), which solves the problem that the riding bottom plate structure has high requirements for 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, so as to mine coal in the upper area and the lower area at the same time. In a specific embodiment, the structure is described by taking the left rocker arm 40 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 in 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 side, thereby driving the left roller 60 or the 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 groove side of the scraper conveyor 200, so as to avoid the cutting motor 42 and the cutting transmission mechanism 43 protruding from the area between the left roller 60 and the right roller 70, and prevent 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.

[0041] Preferably, the cutting motor 42 in the left drum 60 and the right drum 70 can use two low-power motors to drive the corresponding left drum 60 or right drum 70 for coal mining; compared with the driving method of a single high-power motor, the space occupied by the cutting motor 42 above the scraper conveyor 200 is effectively reduced, ensuring that the overall height of the coal mining machine 100 is small while increasing the coal passing space between the coal mining machine 100 and the scraper conveyor 200, effectively improving the coal mining efficiency. For example, in this solution, two 125kW cutting motors are selected, which effectively reduces the space occupied above the scraper conveyor compared to directly using a 250kW cutting motor.

[0042] Specifically, the cutting transmission mechanism 43 includes a first gear transmission mechanism, a cutting part planetary reducer, a second gear transmission mechanism and a spline shaft which are sequentially connected, the output end of the spline shaft is the drum power input end, the left drum 60 and the right drum 70 are respectively installed on the output end of the corresponding spline shaft through the drum connecting sleeve, and the left drum 60 and the right drum 70 are small-diameter high-loading rate drums. The diameter of the left drum 60 and the right drum 70 is set to 750mm, at this time, the mining height range of the ultra-thin coal seam shearer 100 can reach 0.8-1.5m.

[0043] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection 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, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An ultra-thin coal seam mining machine, used for mining coal from a coal wall and transporting the mined coal blocks to a designated area through a scraper conveyor, the ultra-thin coal seam mining machine comprising: 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, 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 full height range of the left roller and the right roller at one time.

2. The ultra-thin coal seam mining machine 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 transmission-connected to the traveling mechanism. The traction part planetary reducer is arranged side by side with the traction motor and connected through a transmission assembly so that a roughly L-shaped structure is formed therebetween.

3. The ultra-thin coal seam mining machine 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 mining machine according to claim 1, characterized in that: The electric control box is provided 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 mining machine can adapt to the undulating working surface.

5. The ultra-thin coal seam mining machine 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 through a supporting sliding shoe assembly, and the supporting sliding shoe assembly is a riding shovel plate structure.

6. The ultra-thin coal seam mining machine 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 downward mining angle range of the shearer.

7. The ultra-thin coal seam mining machine 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, and the cutting transmission mechanism is connected to the corresponding left roller or the right roller by the end face transmission 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.

8. The ultra-thin coal seam mining machine 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 right drum to mine coal.

9. The ultra-thin coal seam mining machine 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 which 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.

10. The ultra-thin coal seam mining machine 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 mining machine is 0.8-1.5 m.

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