A coal cleaning device for the final stage of fully mechanized mining faces

Abstract

This utility model provides a coal cleaning device for the final stage of fully mechanized mining faces, including a frame, a traction beam, and a plow. The frame includes a chassis and a traction frame. The chassis is used to move along the scraper conveyor, and the traction frame is mounted on the chassis. The traction frame is connected to the traction beam, and the traction beam is connected to the plow. The frame is used to pull the plow to move on one side of the scraper conveyor via the traction beam. In this application, the frame moves via the chassis and pulls the plow via the traction frame and traction beam, cleaning the accumulated coal on one side of the scraper conveyor in the final stage of fully mechanized mining faces in a "plowing" manner. The overall mechanical relationship is simple, and excessive bending torque is not generated on the traction frame and traction beam. The chassis, traction frame, and traction beam have sufficient structural strength to cope with the resistance generated when the plow cleans the accumulated coal. The frame also has strong operational stability, avoiding problems such as machine overturning or damage to structural connecting parts.

Description

Technical Field

[0001] This utility model relates to the field of coal cleaning devices for the final stage of mining, and more specifically, to a coal cleaning device for the final stage of fully mechanized mining faces. Background Technology

[0002] In China, most longwall mining faces employ longwall retreat mining. Towards the end of the mining phase, a large amount of coal collapses into the retreat channel between the scraper conveyor and the stacked supports, forming a narrow, elongated coal accumulation space. Due to the influence of the stacked supports, the mining machine is unable to load the collapsed coal. Currently, coal is mostly transported to the face scraper conveyor manually. Clearing coal from one working area requires 100 to 200 people for 6-8 hours, resulting in high labor intensity, low efficiency, and high safety risks. In addition, some mines use dump trucks, excavators, and loaders for clearing coal accumulation at the end of the mining phase. While this improves efficiency, the limited working space and safety hazards still fail to solve the existing problem of coal clearing at the end of the mining phase.

[0003] In recent years, some new coal cleaning technologies have been developed for the final stage of coal mining. For example, Chinese invention patent CN202310163299.1 discloses a coal cleaning device for the final stage of fully mechanized coal mining faces. This device mainly consists of a machine body, a telescopic frame, a coal shoveling mechanism, a telescopic hydraulic cylinder, and a lifting hydraulic cylinder. The machine body is pushed forward by the coal mining machine along the scraper conveyor. The machine body pushes the plow-shaped shovel to turn over the accumulated coal and throw it into the scraper conveyor chute. However, the plow-shaped shovel in this patent relies on the machine body for forward movement, i.e., it uses a "plow-pushing" method to clean the accumulated coal. In this "plow-pushing" method, the plow-shaped shovel is not only subjected to pushing force but also to the resistance of the accumulated coal, resulting in a complex mechanical relationship. Related structural connectors will bear severe bending and torsional forces, requiring the machine body to have strong operational stability and structural strength; otherwise, the machine body may easily overturn or the structural connectors may be damaged.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a coal cleaning device for the final stage of fully mechanized mining faces. This device can clean up accumulated coal by pulling a plow on a scraper conveyor via a frame during the final mining stage, and has strong operational stability, avoiding problems such as machine overturning or damage to structural connecting parts.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a frame, a traction beam, and a plow blade. The frame includes a chassis and a traction frame. The chassis is used to move along the scraper conveyor. The traction frame is mounted on the chassis. The traction frame is connected to the traction beam. The traction beam is connected to the plow blade. The frame is used to traction the plow blade to move on one side of the scraper conveyor via the traction beam.

[0007] In this application, the frame moves via the chassis and is pulled by the traction frame and traction beam to clear the coal accumulation on one side of the scraper in the final stage of the fully mechanized mining face in a "plowing" manner. The overall mechanical relationship is simple, and the traction frame and traction beam will not generate excessive bending torque. The chassis, traction frame and traction beam have sufficient structural strength to cope with the resistance generated when the plow clears the coal accumulation. The frame also has strong operational stability and avoids problems such as machine body overturning or damage to structural connecting parts.

[0008] Based on the above, a swing cylinder is provided between the traction beam and the traction frame to make the traction beam swing up and down. The plow includes a plow beam, which is hinged to the traction beam. The plow beam is connected to a balancing mechanism for adjusting the angle of the plow beam.

[0009] By using a swing cylinder to adjust the up-and-down swing angle of the traction beam, the raising and lowering of the plow can be indirectly controlled. Furthermore, by using the plow beam to hinge the traction beam and then using a balancing mechanism to adjust the angle of the plow beam on the traction beam, the plow can be made to clean up the accumulated coal at the optimal plowing angle, thereby improving the efficiency of cleaning up the accumulated coal.

[0010] Based on the above, the balancing mechanism adopts a traction link, which is hinged to the traction frame and the plow beam respectively. The traction frame, the traction beam, the traction link and the plow beam form a parallelogram planar four-bar linkage, so that the plow can translate relative to the frame.

[0011] By using a traction linkage as a balancing mechanism, a parallelogram-shaped planar four-bar linkage is formed between the traction frame, traction beam, traction linkage, and plow beam. This avoids rotation when the plow swings up and down, thus enabling the plow to clean up coal accumulation at the optimal plowing angle.

[0012] Based on the above, on the traction frame, the traction link is hinged above the traction beam, the swing cylinder is hinged above the traction link, the middle section of the traction beam and the traction link is bent upwards, and the swing cylinder is hinged to the middle section of the traction beam.

[0013] By setting the traction link parallel above the traction beam, the traction beam can better exert its traction function, and the traction link can better adjust its angle. Furthermore, by setting the parallel traction beam and traction link into an upward-bending shape, the height of the plow can be increased. Moreover, the upward-bending part is connected to the swing cylinder, which allows the swing cylinder to apply force to the traction beam at a horizontal angle, reducing the space occupied by the swing cylinder.

[0014] Based on the above, one side wall of the traction frame is provided as a traction main board, with the surface of the traction main board facing one side of the frame, so that the traction beam extends obliquely to one side of the frame.

[0015] By using an angled traction main board, the overall mechanical relationship of the device can be further simplified, and the operational stability of the device can be enhanced.

[0016] Based on the above, the chassis is provided with a traveling wheel and a drive mechanism, the drive mechanism is connected to the traveling wheel, and the traveling wheel is used to drive the chassis to move.

[0017] By incorporating a drive mechanism within the frame, the use of a coal mining machine to pull or push is avoided, which saves energy consumption generated during the operation of the coal mining machine, further simplifies the mechanical relationship of the device, and enhances the overall operational stability of the device.

[0018] Based on the above, the chassis is provided with a guide drive slipper, and the traveling wheel is located inside the guide drive slipper. The traveling wheel is used to engage the pin row of the scraper conveyor to drive the chassis to move. The housing of the guide drive slipper is used to surround the pin row for movement guidance.

[0019] The guide drive slipper can drive the chassis to move and guide the movement.

[0020] Based on the above, the chassis includes a support slipper, which is used to support the chassis on the upper surface of the scraper conveyor trough for sliding. The guide drive slipper and the support slipper are used to mount the chassis above the scraper conveyor trough.

[0021] By supporting the skids, the chassis can move on the sides of the trough, which helps reduce the resistance when pulling the plow and ensures the overall stability of the device.

[0022] Based on the above, the plow includes a plow surface and a cutter. The plow surface is connected to the plow beam, and the cutter is located at the lower end of the plow surface. The cutter is used to scoop up accumulated coal when the frame moves, and the plow surface is used to turn and throw the accumulated coal into the chute of the scraper conveyor when the frame moves.

[0023] Based on the above, a reinforcing rod is provided between the plowshare and the plow blade beam, and the reinforcing rod is used to strengthen the structural strength of the plowshare.

[0024] The plow, constructed using a plow beam, plowshare, blades, and reinforcing rods, boasts high coal cleaning efficiency and structural strength, making it suitable for traction use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the device's operating status according to this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the frame structure of this utility model; Figure 4 This is a schematic diagram of the frame structure from another angle of this utility model; Figure 5 This is a schematic diagram of the guide drive slipper of this utility model; Figure 6 This is a schematic diagram of the plow blade structure of this utility model.

[0026] In the figure, the attached reference numerals are as follows: frame 1, chassis 11, traction frame 12, traction main board 121, guide drive slipper 13, traveling wheel 14, drive mechanism 15, support slipper 16, traction beam 2, plow 3, plow beam 31, plow surface 32, cutter 33, reinforcing rod 34, swing cylinder 4, balancing mechanism 5, traction link 51, hydraulic support 7, stacked support 8, scraper conveyor 9, pin rack 91, trough side 92, coal shovel plate 93. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0028] Example 1 like Figure 1 As shown, when the mining reaches the final stage, a large amount of coal collapses into the retraction channel between the scraper conveyor 9 and the stack support 8, forming a narrow coal accumulation space. Due to the influence of the stack support 8, the coal mining machine is unable to complete the loading of the collapsed coal; as Figures 1-6 As shown, the coal cleaning device for the end of the longwall mining face in this embodiment includes a frame 1, a traction beam 2, and a plow 3. The frame 1 is located below the hydraulic support 7. The frame 1 moves along the scraper conveyor 9. The frame 1 pulls the plow 3 to move through the traction beam 2. The plow 3 turns over the accumulated coal in the retraction channel between the scraper conveyor 9 and the stack support 8 and throws it into the chute of the scraper conveyor 9, thereby completing the coal cleaning operation.

[0029] Specifically, the frame 1 includes a chassis 11 and a traction frame 12. The chassis 11 is used to move along the scraper conveyor 9. The traction frame 12 is mounted on the chassis 11 and is connected to the traction beam 2. The traction beam 2 is connected to the plow 3. The frame 1 is used to pull the plow 3 to move on one side of the scraper conveyor 9 via the traction beam 2. The traction beam 2 and the plow 3 are connected to the frame 1 via the traction frame 12, so that when the frame 1 moves, it can pull the plow 3 to move on one side of the scraper conveyor 9, thereby enabling the plow 3 to clear the coal accumulation between the scraper conveyor 9 and the stack support 8.

[0030] In this embodiment, the frame 1 moves via the chassis 11 and is pulled by the traction frame 12 and traction beam 2 to pull the plow 3, thus clearing the coal accumulation on one side of the scraper conveyor 9 in the final stage of the fully mechanized mining face in a "plowing" manner. The overall mechanical relationship is simple, and the traction frame 12 and traction beam 2 will not generate excessive bending torque. The chassis 11, traction frame 12 and traction beam 2 have sufficient structural strength to cope with the resistance generated when the plow 3 clears the coal accumulation. As a result, the frame 1 also has strong operational stability, avoiding problems such as machine body overturning or damage to structural connecting parts.

[0031] Example 2 Based on Embodiment 1, in this embodiment, a swing cylinder 4 is provided between the traction beam 2 and the traction frame 12 to make the traction beam 2 swing up and down. The plow shovel 3 includes a plow beam 31, which is hinged to the traction beam 2. The plow beam 31 is connected to a balancing mechanism 5 for adjusting the angle of the plow beam 31.

[0032] In the existing technology, the lifting and lowering of the plow-shaped shovel relies on the lifting cylinder to drive the entire plow-shaped shovel to rotate. This rotary lifting method results in a small lifting and lowering range of the plow-shaped shovel. Moreover, when adjusting the height of the plow-shaped shovel, the angle of the plow-shaped shovel is also adjusted at the same time. The change in the angle of the plow-shaped shovel means changing the angle at which the blades scoop up the coal and the angle at which the plow surface turns over and throws the coal, thus affecting the efficiency of cleaning up the coal.

[0033] In this embodiment, the swing cylinder 4 is used to indirectly control the lifting and lowering of the plow shovel 3 by adjusting the up-and-down swing angle of the traction beam 2. The swing angle is amplified by the traction beam 2 to have a relatively wide swing range. Moreover, the plow shovel 3 is hinged to the traction beam 2 by using the plow shovel beam 31, and the angle of the plow shovel beam 31 on the traction beam 2 is adjusted by using the balancing mechanism 5. This allows the plow shovel 3 to clean up the accumulated coal at the optimal plowing angle, thereby improving the efficiency of cleaning up the accumulated coal.

[0034] Example 3 Based on Embodiment 2, the balancing mechanism 5 further employs a traction link 51, which is hinged to the traction frame 12 and the plow beam 31. The traction frame 12, traction beam 2, traction link 51, and plow beam 31 form a parallelogram-shaped planar four-bar linkage. The traction beam 2 and traction link 51 are arranged in parallel, and the four hinge points at both ends of the traction beam 2 and traction link 51 form a parallelogram shape. The two hinge points on the traction frame 12 are relatively fixed, and the two hinge points on the plow beam 31 have one degree of freedom. Therefore, when the traction beam 2 swings up and down, the line connecting the two hinge points on the plow beam 31 can always remain parallel to the line connecting the two hinge points on the traction frame 12, so that the plow 3 can translate relative to the frame 1 and avoid rotation of the plow 3.

[0035] In other embodiments, the balancing mechanism 5 may be an adjusting cylinder installed between the traction beam 2 and the plow beam 31, and the angle of the plow beam 31 may be adjusted by extending or retracting the adjusting cylinder.

[0036] In this embodiment, by using the traction link 51 as a balancing mechanism, a parallelogram-shaped planar four-bar linkage is formed between the traction frame 12, the traction beam 2, the traction link 51, and the plow beam 31. This avoids rotation when the plow 3 swings up and down, thus enabling the plow 3 to clean up the accumulated coal at the optimal plowing angle.

[0037] Example 4 Based on embodiment 3, further, on the traction frame 12, the traction link 51 is hinged above the traction beam 2, the swing cylinder 4 is hinged above the traction link 51, the middle section of the traction beam 2 and the traction link 51 is bent upward, and the swing cylinder 4 is hinged to the middle section of the traction beam 2.

[0038] In this embodiment, the traction link 51 is arranged parallel above the traction beam 2, which enables the traction beam 2 to better perform its traction function and the traction link 51 to better perform its angle adjustment function. Furthermore, by setting the parallel traction beam 2 and traction link 51 into an upwardly bent shape, the height of the plow 3 can be increased, allowing the plow 3 to have a larger plow surface. Moreover, the upward bend is connected to the swing cylinder 4, which allows the swing cylinder 4 to apply force to the traction beam 2 at a horizontal angle, reducing the space occupied by the swing cylinder 4.

[0039] Example 5 Based on Embodiment 1, Embodiment 2, Embodiment 3 or Embodiment 4, in this embodiment, one side wall of the traction frame 12 is set as the traction main plate 121. The ear plate seat of the hinge point between the traction beam 2, the swing cylinder 4 and the traction connecting rod 51 and the traction frame 12 can all be set on the traction main plate 121. The plate surface of the traction main plate 121 can be set as a flat plate or a curved plate. The traction main plate 121, as the side wall of the traction frame 12, is preferably set on the frame 1 at an angle perpendicular to the horizontal plane. The plate surface of the traction main plate 121 faces the frame 1 so that the traction beam 2 extends obliquely to the side of the frame 1.

[0040] The inclined traction main board 121 can further simplify the overall mechanical relationship of the device and enhance the operational stability of the device.

[0041] Example 6 Based on Embodiment 1 or Embodiment 2, in this embodiment, the chassis 11 is provided with a walking wheel 14 and a drive mechanism 15. The drive mechanism 15 is connected to the walking wheel 14, and the walking wheel 14 is used to drive the chassis 11 to move.

[0042] The drive mechanism 15 can be a hydraulic motor or an electric motor, and a reducer can be installed between the drive mechanism 15 and the traveling wheel 14.

[0043] By incorporating a drive mechanism 15 into the frame 1, the use of a coal mining machine to pull or push is avoided, which saves energy consumption generated by the operation of the coal mining machine, further simplifies the mechanical relationship of the device, and enhances the overall operational stability of the device.

[0044] Example 7 Based on embodiment 6, in this embodiment, the chassis 11 is provided with a guide drive slipper 13, and the guide drive slipper 13 is provided with a traveling wheel 14. The traveling wheel 14 is used to engage the pin row 91 of the scraper 9 to drive the chassis 11 to move. The housing of the guide drive slipper 13 is used to surround the pin row 91 for movement guidance.

[0045] The guide drive slipper 13 can be installed on the side wall of the chassis 11, and the drive mechanism 15 can be set inside the chassis 11. In this way, the drive mechanism 15 set inside the chassis 11 can directly drive the walking wheel 14.

[0046] The guide drive shoe 13 can drive the chassis 11 to move and guide the movement.

[0047] Example 8 Based on embodiment 7, the chassis 11 further includes a support slipper 16, which is used to support the chassis 11 on the upper surface of the groove side 92 of the scraper conveyor 9 for sliding. The guide drive slipper 13 and the support slipper 16 are used to mount the chassis 11 above the chute of the scraper conveyor 9.

[0048] In the prior art, support mechanisms similar to the support slipper 16 of this application are usually slidably mounted on the coal shovel plate 93 of the scraper conveyor 9. Because there is coal accumulation on the coal shovel plate 93, the "plowing" method is usually used so that the plow-shaped shovel first clears the coal accumulation on the coal shovel plate 93, and then the support mechanism slides over the coal shovel plate 93. Otherwise, the coal accumulation will cause serious resistance, making it difficult to continue moving.

[0049] In this embodiment, the support slipper 16 is set on the trough 92 of the scraper conveyor 9. Since there is less coal accumulation on the trough 92, the support slipper 16 can slide smoothly along the trough 92. In this way, the plow 3 can be pulled by the frame 1 in the manner of "pulling the plow". Therefore, the support slipper 16 at the bottom of the frame 1 can also move on the trough 92 with low resistance.

[0050] The guide drive slipper 13 and the support slipper 16 can each be arranged in two or more positions on the chassis 11, front and rear, to enhance the chassis's movement stability.

[0051] By supporting the sliding shoe 16, the chassis 11 can travel on the side of the trough, which helps to reduce the resistance when pulling the plow 3 and ensures the overall stability of the device.

[0052] Example 9 Based on Embodiment 2, in this embodiment, the plow shovel 3 includes a plow surface 32 and a cutter 33. The plow surface 32 is connected to the plow beam 31, and the cutter 33 is located at the lower end of the plow surface 32. The cutter 33 is used to scoop up the accumulated coal when the frame 1 moves, and the plow surface 32 is used to turn the accumulated coal into the chute of the scraper conveyor 9 when the frame 1 moves.

[0053] A reinforcing rod 34 is provided between the plowshare 32 and the plow beam 31. The reinforcing rod 34 is used to strengthen the structural strength of the plowshare 32.

[0054] The plowshare 32 and the blade 33 can be provided with notches to avoid the coal shovel plate 93. The plowshare 32 can be configured to fit the shape of the trough side 92 so that the plowshare 32 does not miss any coal when turning over and throwing it, and the plowshare 3 can perform coal cleaning operations more efficiently.

[0055] The plow shovel 3, consisting of a plow beam 31, a plow surface 32, a blade 33, and a reinforcing rod 34, has high coal cleaning efficiency and high structural strength, making it suitable for traction use.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A coal cleaning device for the end of a fully-mechanized coal mining face, characterized in that, The machine includes a frame (1), a traction beam (2), and a plow (3). The frame (1) includes a chassis (11) and a traction frame (12). The chassis (11) is used to move along the scraper (9). The traction frame (12) is mounted on the chassis (11). The traction frame (12) is connected to the traction beam (2). The traction beam (2) is connected to the plow (3). The frame (1) is used to pull the plow (3) to move on one side of the scraper (9) via the traction beam (2). A swing cylinder (4) is provided between the traction beam (2) and the traction frame (12) to make the traction beam (2) swing up and down. The plow (3) includes a plow beam (31). The plow beam (31) is hinged to the traction beam (2). The plow beam (31) is connected to a balancing mechanism (5) for adjusting the angle of the plow beam (31).

2. The coal cleaning device at the end of the fully-mechanized coal mining face according to claim 1, characterized in that, The balancing mechanism (5) uses a traction link (51), which is hinged to the traction frame (12) and the plow beam (31) respectively. The traction frame (12), the traction beam (2), the traction link (51) and the plow beam (31) form a parallelogram planar four-bar linkage so that the plow (3) can translate relative to the frame (1).

3. The coal cleaning device at the end of the fully-mechanized coal mining face according to claim 2, characterized in that, On the traction frame (12), the traction link (51) is hinged above the traction beam (2), and the swing cylinder (4) is hinged above the traction link (51); the middle section of the traction beam (2) and the traction link (51) bends upward, and the swing cylinder (4) is hinged to the middle section of the traction beam (2).

4. The coal cleaning device at the end of the fully-mechanized coal mining face according to claim 1 or 2 or 3, characterized in that, One of the side walls of the traction frame (12) is provided as a traction main board (121), with the surface of the traction main board (121) facing the frame (1) so that the traction beam (2) extends obliquely to the frame (1).

5. The coal cleaning device at the end of the fully-mechanized coal mining face according to claim 1 or 2 or 3, characterized in that, The chassis (11) is provided with a walking wheel (14) and a drive mechanism (15). The drive mechanism (15) is connected to the walking wheel (14), and the walking wheel (14) is used to drive the chassis (11) to move.

6. The coal cleaning device at the end of the fully-mechanized coal mining face according to claim 5, characterized in that, The chassis (11) is provided with a guide drive slipper (13), and the traveling wheel (14) is located inside the guide drive slipper (13). The traveling wheel (14) is used to engage the pin row (91) of the scraper (9) to drive the chassis (11) to move. The housing of the guide drive slipper (13) is used to surround the pin row (91) for movement guidance.

7. The coal cleaning device at the end of the fully-mechanized coal mining face according to claim 6, characterized in that, The chassis (11) includes a support slipper (16), which is used to support the chassis (11) on the upper surface of the groove (92) of the scraper (9) for sliding. The guide drive slipper (13) and the support slipper (16) are used to mount the chassis (11) above the chute of the scraper (9).

8. The coal cleaning device for the final stage of fully mechanized mining face according to claim 2 or 3, characterized in that, The plow (3) includes a plow face (32) and a cutter (33). The plow face (32) is connected to the plow beam (31). The cutter (33) is located at the lower end of the plow face (32). The cutter (33) is used to scoop up the accumulated coal when the frame (1) moves. The plow face (32) is used to turn the accumulated coal into the chute of the scraper conveyor (9) when the frame (1) moves.

9. The coal cleaning device for the final stage of fully mechanized mining face according to claim 8, characterized in that, A reinforcing rod (34) is provided between the plowshare (32) and the plow beam (31), and the reinforcing rod (34) is used to strengthen the structural strength of the plowshare (32).

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