Coal bunker cleaning device

Abstract

The utility model provides a coal bunker cleaning device which comprises a rotating platform, a double-column telescopic platform and a foldable hydraulic mechanical arm, the double-column telescopic platform and the foldable hydraulic mechanical arm can control the positions of a double-wheel four-milling head in the vertical direction and the horizontal direction respectively, and therefore the coal bunker can be accurately cleaned through the double-wheel four-milling head. Compared with an existing coal bunker cleaning mode, the double-wheel four-milling-head coal bunker cleaning device can achieve full-automatic cleaning, meanwhile, the double-wheel four-milling-head coal bunker cleaning device further provides a double-wheel four-milling-head coal bunker cleaning device, simultaneous cleaning of the coal bunker through the four milling heads is achieved through two sets of driving systems, and cleaning efficiency and quality of the coal bunker are improved.

Description

Technical Field

[0001] This utility model relates to the field of coal bunker cleaning, and more specifically, to a coal bunker cleaning device for cleaning phenomena such as coal bunker blockage, arching, and sticking to the walls. Background Technology

[0002] In coal mine production, coal bunkers are a crucial link in the transportation and storage of raw coal, and their stable operation is of paramount importance. Common coal bunker designs include a vertical cylindrical shape combined with a conical funnel shape. Underground coal bunkers are mostly single units with a capacity of 100-600 tons, while surface coal bunkers are often connected in rows, with individual bunker capacities of 800-1200 tons. Failures or accidents in coal bunkers not only disrupt continuous underground production but can also lead to shutdowns at the working face, impacting the mine's economic efficiency. Most coal bunker accidents are bottom-entry collapses, with malfunctions including jamming, arching, and wall adhesion. Figure 1 The document details the specific circumstances and forms of the various malfunctions mentioned above in the coal bunker.

[0003] In existing technologies, the main methods for handling coal bunker malfunctions are manual processing, explosive blasting, or arch breakers. However, all of these methods have certain drawbacks. Manual processing is inefficient, and workers must operate in the coal bunker environment containing harmful gases such as carbon monoxide and methane, facing significant life-threatening risks. While explosive blasting can solve the blockage problem to some extent, it can easily trigger an explosion of harmful gases, causing serious accidents. Arch breakers have a limited range of application and are ineffective in dealing with complex blockages. In summary, existing technologies for cleaning coal bunkers still suffer from low efficiency, high risk, and incomplete cleaning. Summary of the Invention

[0004] This utility model addresses the technical problems existing in the prior art by providing a coal bunker cleaning device, a coal bunker cleaning method, and a dual-wheel four-milling head, in order to solve the problems of low work efficiency and incomplete cleaning when cleaning coal bunkers in the prior art.

[0005] According to a first aspect of this utility model, a coal bunker cleaning device is provided, comprising a rotatable platform and a double-column telescopic platform connected and fixed from top to bottom; the coal bunker cleaning device further includes a foldable hydraulic arm, a working head traction rope connected to the foldable hydraulic arm, and a replaceable working head fixed to the end of the working head traction rope; the replaceable working head is detachably connected to a cleaning head and a milling head, and the cleaning head or milling head can be switched according to different working states; the double-column telescopic platform can extend and retract vertically to control the vertical position of the replaceable working head, and the foldable hydraulic arm can extend horizontally to control the horizontal position of the replaceable working head; the cleaning head is used to clean the coal bunker wall, and the milling head is used to mill the coal bunker.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Optionally, the working head traction rope is an anti-rotation steel wire rope, and its length is controlled by a winch.

[0008] Optionally, the milling head includes two drive units and four milling heads, with the two milling heads arranged coaxially.

[0009] Optionally, the milling head includes an internal curve hydraulic motor, a helical cylindrical gear, a bevel gear, and an angular contact ball bearing. The internal curve hydraulic motor drives the helical cylindrical gear to rotate, and the helical cylindrical gear drives the bevel gear to rotate. The milling head is fixed on the bevel gear shaft, and the milling head is rotated and milled through the bevel gear shaft.

[0010] Optionally, the milling head also includes a gyroscope for real-time detection of the milling direction.

[0011] Optionally, the two curved hydraulic motors rotate in opposite directions, and the milling wheel is in an outward milling state.

[0012] The coal bunker cleaning solution designed in this utility model can accurately and efficiently overcome a series of thorny problems such as coal bunker blockage, arching, and wall adhesion. Compared with traditional methods, this utility model can significantly reduce the troubleshooting time, effectively reduce production stoppages caused by coal bunker malfunctions, and eliminate the need for manual operation, thus avoiding workers having to work inside the coal bunker for extended periods. Furthermore, in conjunction with the dual-wheel four-milling head designed in this utility model, the cleaning efficiency of the coal bunker can be effectively improved, and the milling is more complete and thorough. Attached Figure Description

[0013] Figure 1 Diagrams illustrating various malfunctions in the coal bunker; among them Figure 1 a is a schematic diagram of the jamming phenomenon. Figure 1 b is a schematic diagram of the arching phenomenon. Figure 1 c is a schematic diagram of the wall adhesion phenomenon;

[0014] Figure 2 This is a schematic diagram of the coal bunker cleaning device in its first state according to Embodiment 1;

[0015] Figure 3 This is a schematic diagram of the coal bunker cleaning device in the second state according to Example 1;

[0016] Figure 4 This is a partial enlarged view of the coal bunker cleaning device in Example 1;

[0017] Figure 5 This is a schematic diagram of the overall structure of a dual-wheel, four-milling-head machine.

[0018] Figure 6 This is a schematic diagram of the milling head structure;

[0019] Figure 7 This is a cross-sectional view of the dual-wheel, four-milling-head machine in the first direction;

[0020] Figure 8 This is a cross-sectional view and a partial enlarged view of the dual-wheel four-milling head in the second direction;

[0021] In the attached drawings, the reference numerals represent the following components: 21. Rotatable platform; 22, 23, 24. Double-column telescopic structure; 25. Two-section foldable hydraulic telescopic boom; 26. Working head traction rope; 27. Replaceable working head; 31. Flange joint; 32. Internal curve hydraulic motor; 33. Movable counterweight box; 34. Helical cylindrical gear; 35. Milling head; 36. Angular contact ball bearing; 37. Gyroscope; 41. Flange joint; 42. Cycloidal hydraulic motor; 43. Spreading hammer; 44. Pioneer drill; 45. Vibrating core gear; 46. Soft steel wire rope; 47. Placement box. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In addition, the technical features of the various embodiments or individual embodiments provided by this utility model can be arbitrarily combined to form feasible technical solutions. Such combinations are not bound by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model. Example 1

[0023] like Figure 2-4 As shown, this is a coal bunker cleaning device according to the first embodiment of the present invention. The coal bunker cleaning device includes a double-column retractable platform fixed on a rotatable platform 21. The double-column retractable platform includes double-column retractable structures 22, 23 and 24 connected sequentially from top to bottom. The double-column retractable platform can realize the telescopic function, with a minimum length of 2.7 meters and a maximum length of 6.5 meters, thereby enabling it to initially penetrate into the coal bunker for operation.

[0024] The aforementioned double-column retractable platform has two foldable hydraulic telescopic arms 25 fixedly connected horizontally at its end. These two foldable hydraulic telescopic arms 25 can extend and retract horizontally to adjust the horizontal position of the replaceable working head 27 in the coal bunker. The ends of the two foldable hydraulic telescopic arms 25 are connected to the working head traction rope 26, and the end of the working head traction rope 26 is fixedly connected to the replaceable working head 27. The length of the working head traction rope 26 is controlled by a winch, so that the replaceable working head 27 can be raised and lowered by the working head traction rope 26 to adjust its depth position in the coal bunker, thereby cleaning the bottom of the coal bunker. The replaceable working head 27 can switch between a double-wheel four-milling head and a cleaning head. During operation, the double-wheel four-milling head or the cleaning head can be selected to be connected according to the cleaning needs. The specific fixing and disassembly methods can refer to existing methods, such as connecting through flange joints, which is existing technology and will not be elaborated here.

[0025] When the coal bunker is full, firstly, the double-column retractable platform is in the retracted state, and the two foldable hydraulic telescopic arms 25 are in the folded state. The working head traction rope 26 is released by the winch, and the double-wheel four-milling head descends under the action of gravity to mill the coal. During this process, the double-wheel four-milling head will repeatedly drill in and out to prevent the milled coal from blocking the working channel. Secondly, the double-wheel four-milling head retracts, the working head is replaced by the cleaning head, the two foldable hydraulic telescopic arms 25 are unfolded, and the cleaning head is controlled to move horizontally to carry out expansion and cleaning of coal adhering to the wall. Then, the double-column retractable platform extends to carry out further milling work on the coal bunker.

[0026] When the coal bunker is in a half-bunker state, firstly, the double-column retractable platform is in the extended state, and the two foldable hydraulic telescopic arms 25 are in the folded state. The working head traction rope 26 is released by the winch, and the double-wheel four-milling head descends under the action of gravity to mill the coal. During this process, the double-wheel four-milling head will repeatedly drill in and out to prevent the milled coal from blocking the working channel. Secondly, the double-wheel four-milling head retracts, the working head is replaced by the cleaning head, the two foldable hydraulic telescopic arms 25 are unfolded, and the cleaning head is controlled to move horizontally to carry out expansion and cleaning of the coal hanging on the wall. Then, the double-column retractable platform extends further to carry out further milling work on the coal bunker.

[0027] For cases of coal bunker wall adhesion, the working head traction rope 26 is retracted by a winch, and a cleaning head can be used instead of the working head 27. The rotatable platform 21 controls the overall rotation of the machine, and the two foldable hydraulic telescopic arms 25 control the horizontal movement of the cleaning head. The double-column retractable platform adjusts the depth position of the cleaning head in the coal bunker, thereby achieving the cleaning of wall adhesion. Example 2

[0028] like Figure 5-8As shown, this is a dual-wheel four-milling head structure provided in an embodiment of the present invention. The dual-wheel four-milling head can be fixed to the replaceable working head 27 in the above embodiment to realize milling of the coal bunker.

[0029] This utility model's dual-wheel four-milling-head design includes two sets of drive and transmission devices. The milling head 35 comprises four milling head structures, with two milling heads forming a group connected to the drive structure, such as... Figure 6 As shown, the dual-wheel four-milling head specifically includes a flange joint 31, which is used to fix the replaceable working heads 116 and 27 to achieve the fixation of the dual-wheel four-milling head. The internal curved hydraulic motor 32, helical cylindrical gear 34 and angular contact ball bearing 36 are located inside the movable counterweight box 33. The internal curved hydraulic motor 32 drives the helical cylindrical gear 34 to rotate, and the helical cylindrical gear 34 drives the bevel gears on the left and right sides to rotate, and transmits the rotation to the bevel gear shaft. The milling head is fixed on the bevel gear shaft, and the milling head is driven to rotate and mill through the bevel gear shaft. The transmission shaft and the output shaft are both supported by the angular contact ball bearing 36.

[0030] Furthermore, the movable counterweight box 33 adopts a sealed structure to seal the gear system. At the same time, the bottom of the movable counterweight box is set as a triangle so that the working head can mill downwards. Two curved hydraulic motors are selected to rotate in opposite directions, so that the milling wheel is in an outward milling state, which increases the working stability of the dual-wheel four-milling head and avoids violent shaking due to downward milling. Meanwhile, a gyroscope 7 is equipped in the bottom of the movable counterweight box 33 to detect the milling direction in real time. If there is a tilt, it can be adjusted by adjusting the speed of the milling wheel.

[0031] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A coal bunker cleaning device, characterized in that, It includes a rotatable platform (21) that is fixed from top to bottom and a double-column telescopic platform (22, 23, 24). The coal bunker cleaning device also includes a foldable hydraulic manipulator (25), a working head traction rope (26) connected to the foldable hydraulic manipulator (25), and a replaceable working head (27) fixed to the end of the working head traction rope (26). The replaceable working head (27) is detachably connected to the cleaning head and the milling head, allowing for switching between the cleaning head and the milling head depending on the working state; The dual-column telescopic platform (22, 23, 24) can extend and retract vertically to control the vertical position of the replaceable working head (27), and the foldable hydraulic robotic arm (25) can extend horizontally to control the horizontal position of the replaceable working head (27). The cleaning head is used to clean the walls of the coal bunker, and the milling head is used to mill the coal bunker.

2. The coal bunker cleaning device according to claim 1, characterized in that, The working head traction rope (26) is an anti-rotation steel wire rope, and its length is controlled by a winch.

3. The coal bunker cleaning device according to claim 1, characterized in that, The milling head includes two drive units and four milling heads, with the two milling heads arranged coaxially.

4. The coal bunker cleaning device according to claim 3, characterized in that, The milling head includes an internal curve hydraulic motor (32), a helical cylindrical gear (34), a bevel gear, and an angular contact ball bearing (36). The internal curve hydraulic motor (32) drives the helical cylindrical gear (34) to rotate, and the helical cylindrical gear drives the bevel gear to rotate. The milling head is fixed on the bevel gear shaft and rotates and mills through the bevel gear shaft.

5. The coal bunker cleaning device according to claim 4, characterized in that, The milling head also includes a gyroscope (37) for real-time detection of the milling direction.

6. The coal bunker cleaning device according to claim 4, characterized in that, The two curved hydraulic motors (32) rotate in opposite directions, and the milling wheel is in an outward milling state.

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