Coal bunker cleaning device

Abstract

The invention provides a coal bunker cleaning device and a coal bunker cleaning method.The coal bunker cleaning device 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 correspondingly, and therefore accurate cleaning of a coal bunker through the double-wheel four-milling-head is achieved; compared with an existing coal bunker cleaning mode, full-automatic cleaning can be achieved, meanwhile, the invention further provides the double-wheel four-milling-head coal bunker cleaning device, simultaneous cleaning of the coal bunker through the four milling heads is achieved through the two driving systems, and the cleaning efficiency and quality of the coal bunker are improved.

Description

Technical Field

[0001] The present invention relates to the field of coal bunker cleaning, and more specifically, to a coal bunker cleaning device and a coal bunker cleaning method for cleaning phenomena such as jamming, arching, and sticking walls in coal bunkers. Background Art

[0002] In coal mine production, the coal bunker is a key link in the transportation and storage of raw coal, and its stable operation is crucial. The common design of coal bunkers is a vertical cylindrical shape plus a conical funnel shape. Underground coal bunkers are mostly single units with a capacity of 100 - 600 tons, and surface coal bunkers are mostly multi - row, with a single - bunker capacity of 800 - 1200 tons. When a coal bunker fails or has an accident, it will not only affect the continuous transportation of underground coal mine production but also cause the working face to stop production, affecting the economic benefits of the mine. Most of the accidents in coal bunkers are lower - outlet bursting accidents, and the faults mainly include phenomena such as jamming, arching, and sticking walls. Figure 1 Shows the specific situations and forms of the above various faults in the coal bunker.

[0003] In the prior art, the methods for dealing with coal bunker faults are mainly manual handling, explosive blasting, or arch - breaker treatment. However, the above - mentioned methods all have certain defects. The manual handling method is inefficient, and workers need to work in a coal bunker environment with harmful gases such as carbon monoxide and methane, facing great life - safety risks. Although explosive blasting can solve the blockage problem to a certain extent, a slight mistake will cause an explosion of harmful gases, resulting in serious accidents. The arch - breaker treatment method has a limited scope of action and is difficult to effectively deal with complex blockage situations. In summary, the prior art still has technical problems such as low working efficiency, high risk coefficient, and incomplete cleaning when cleaning coal bunkers. Summary of the Invention

[0004] The present invention aims at the technical problems existing in the prior art, and provides a coal bunker cleaning device and a coal bunker cleaning method to solve the problems of low working efficiency and incomplete cleaning in the prior art when cleaning coal bunkers.

[0005] According to a first aspect of the present invention, there is provided a coal bunker cleaning device, including 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 robotic arm, a working - head towing rope connected to the foldable hydraulic robotic arm, and a replaceable working head fixed at the end of the working - head towing rope; the replaceable working head is detachably connected to a cleaning head and a milling head, and switches between the cleaning head and the milling head according to different working states; the double - column telescopic platform can be telescoped up and down to control the up - and - down position of the replaceable working head, and the foldable hydraulic robotic arm can extend horizontally to control the horizontal position of the replaceable working head; the cleaning head is used for cleaning the coal bunker wall, and the milling head is used for milling the coal bunker.

[0006] On the basis of the above technical solutions, the present invention can also be improved as follows.

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

[0008] Optionally, the milling head includes two driving devices and four milling heads, and the two milling heads are coaxially arranged respectively.

[0009] Optionally, the milling head includes an inner curve hydraulic motor helical cylindrical gear, a bevel gear and an angular contact ball bearing. The inner curve hydraulic motor drives the helical cylindrical gear to rotate, 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 driven to rotate and mill by the bevel gear shaft.

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

[0011] Optionally, the two curve hydraulic motors rotate in opposite directions, and the milling wheels are in the outward milling state.

[0012] According to the second aspect of the present invention, there is provided a method for cleaning a coal bunker, which uses the above coal bunker cleaning device, and includes the following steps: For the full coal bunker state, first, the double-column telescopic platform is in the retracted state, the foldable hydraulic manipulator is in the folded state, the working head towing rope is released by the winch, the double-wheel four-milling head descends under the action of gravity, and mills the coal material. Secondly, the double-wheel four-milling head retracts, the working head is replaced with a cleaning head, the foldable hydraulic arm manipulator unfolds, and the cleaning head is controlled to move horizontally to perform the cleaning work of expanding and cleaning the wall-hanging coal material. Subsequently, the double-column telescopic platform extends to perform further milling work on the coal bunker; For the half coal bunker state, first, the double-column telescopic platform is in the extended state, and its length is determined according to the coal material situation. The working head towing rope is released by the winch, the double-wheel four-milling head descends under the action of gravity, and mills the coal material. Secondly, the double-wheel four-milling head retracts, the working head is replaced with a cleaning head, the foldable hydraulic manipulator unfolds, and the cleaning head is controlled to move horizontally to perform the cleaning work of expanding and cleaning the wall-hanging coal material. Subsequently, the double-column telescopic platform extends further to perform further milling work on the coal bunker; For the wall-hanging situation of the coal bunker, the working head towing rope is retracted by the winch, the replaceable working head uses the cleaning head, the rotatable platform controls the overall rotation of the machine, the foldable hydraulic arm manipulator unfolds, the cleaning head is controlled to move horizontally, and the double-column telescopic platform adjusts the depth position of the cleaning head in the coal bunker to achieve the cleaning of the wall-hanging coal material.

[0013] The coal bunker cleaning solution designed by the present invention can accurately and efficiently overcome a series of thorny problems such as coal bunker jamming, arching, and wall sticking. Compared with traditional treatment methods, the present invention can greatly compress the fault handling time, effectively reduce production stagnation caused by coal bunker failures, and does not require manual operation, avoiding workers working inside the coal bunker for a long time. Further cooperating with the double-wheel four-milling head designed by the present invention, it can effectively improve the cleaning efficiency of the coal bunker, and the planing and milling are more complete and thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagrams of various coal bunker failures; 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 sticking phenomenon; Figure 2 Schematic diagram of the coal bunker cleaning device in the first state in Embodiment 1; Figure 3 Schematic diagram of the coal bunker cleaning device in the second state in Embodiment 1; Figure 4 Partial enlarged view of the coal bunker cleaning device in Embodiment 1; Figure 5 Schematic diagram of the overall structure of the double-wheel four-milling head; Figure 6 Schematic diagram of the milling head structure; Figure 7 Cross-sectional view of the double-wheel four-milling head in the first direction; Figure 8 Cross-sectional view of the double-wheel four-milling head in the second direction and partial enlarged view; In the drawings, the reference numerals represent the following components: 21, rotatable platform; 22, 23, 24, double-column telescopic structure; 25, two-section foldable hydraulic telescopic arm; 26, working head towing 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, expansion hammer; 44, pioneer drill; 45, shock core tooth; 46, soft steel wire rope; 47, placement box. DETAILED DESCRIPTION OF THE INVENTION

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. In addition, the technical features in the various embodiments or individual embodiments provided by the present invention can be combined with each other arbitrarily to form a feasible technical solution. Such combination is not restricted by the order of steps and / or the mode of structural composition, but must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the present invention. Embodiment 1

[0016] As Figures 2-4 shown, it 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 in sequence from top to bottom. The double-column retractable platform can achieve the telescopic function, with the shortest length being 2.7 meters and the longest reaching 6.5 meters, so as to be able to initially penetrate into the coal bunker for operation.

[0017] At the end of the above double-column retractable platform, two sections of foldable hydraulic telescopic arms 25 are fixedly connected in the horizontal direction. The two sections of foldable hydraulic telescopic arms 5 can be telescoped in the horizontal direction to adjust the position of the replaceable working head 27 in the horizontal direction in the coal bunker. At the end of the two sections of foldable hydraulic telescopic arms 25, a working head towing rope 26 is connected. The end of the working head towing rope 26 is fixedly connected to the replaceable working head 27. The length of the working head towing rope 26 is controlled by a winch to enable the replaceable working head 27 to be controlled to lift and lower through the working head towing rope 26, so as to adjust the depth position of the replaceable working head 27 in the coal bunker and achieve the cleaning of the bottom of the coal bunker. The replaceable working head 27 can realize the switching 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 for connection according to the cleaning needs. For the specific fixing and disassembling methods, the existing methods can be referred to, such as connecting through a flange joint. This is the prior art and will not be elaborated here.

[0018] For the full - coal - bin state, first, the double - column retractable platform is in the retracted state, the two - section foldable hydraulic telescopic arms 25 are in the folded state, the working - head towing rope 26 is released through the winch, the double - wheel four - milling heads descend under the action of gravity and mill the coal material. During this process, the double - wheel four - milling heads will repeatedly drill in and out to prevent the milled coal material from blocking the working channel. Secondly, the double - wheel four - milling heads retract, the working head is replaced with a cleaning head, the two - section foldable hydraulic telescopic arms 25 unfold, and the cleaning head is controlled to move horizontally to perform the expansion and cleaning of the wall - hanging coal material. Subsequently, the double - column retractable platform extends to perform further milling work on the coal bin.

[0019] For the half - coal - bin state, first, the double - column retractable platform is in the extended state, the two - section foldable hydraulic telescopic arms 25 are in the folded state, the working - head towing rope 26 is released through the winch, the double - wheel four - milling heads descend under the action of gravity and mill the coal material. During this process, the double - wheel four - milling heads will repeatedly drill in and out to prevent the milled coal material from blocking the working channel. Secondly, the double - wheel four - milling heads retract, the working head is replaced with a cleaning head, the two - section foldable hydraulic telescopic arms 25 unfold, and the cleaning head is controlled to move horizontally to perform the expansion and cleaning of the wall - hanging coal material. Subsequently, the double - column retractable platform extends further to perform further milling work on the coal bin.

[0020] For the wall - hanging situation in the coal bin, the working - head towing rope 26 is retracted by the winch, the replaceable working head 27 is used with the cleaning head, the rotatable platform 21 controls the overall rotation of the machine, the two - section foldable hydraulic telescopic arms 25 control the cleaning head to move horizontally, and the double - column retractable platform adjusts the depth position of the cleaning head in the coal bin to achieve the cleaning of the wall - hanging situation. Embodiment 2

[0021] As Figures 5-8 shown, the structure of the double - wheel four - milling head provided by the embodiment of the present invention can be fixed to the replaceable working head 27 in the above - mentioned embodiment to achieve the milling of the coal bin.

[0022] The double - wheel four - milling head of the present invention includes two sets of driving and transmission devices. The milling head 35 includes four milling - head structures. Two milling heads form a group and are connected to the driving structure. As Figure 6 shown, the double - wheel four - milling head specifically includes a flange joint 31, which is used for fixedly connecting with the replaceable working heads 116 and 27 to fix the double - wheel four - milling head. An inner - curve hydraulic motor 32, a helical cylindrical gear 34, and an angular contact ball bearing 36 located inside the movable counterweight box 33. The inner - curve hydraulic motor 32 drives the helical cylindrical gear 34 to rotate. The helical cylindrical gear 34 drives the bevel gears on both sides to rotate, transmits the rotation to the bevel - gear shaft, and the milling head is fixed on the bevel - gear shaft. The milling head is driven to rotate and mill by the bevel - gear shaft. The transmission shaft and the output shaft are both supported by the angular contact ball bearing 36.

[0023] 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 to be triangular for the working head to mill downward. Also, two curve hydraulic motors are selected to rotate in opposite directions, so that the milling wheels are in the state of milling outward, to increase the working stability of the double-wheel four-milling heads and avoid severe shaking caused by downward milling. Meanwhile, a gyroscope 7 is equipped inside the bottom of the movable counterweight box 33 for real-time detection of the milling direction. If there is an inclination, it is adjusted by adjusting the rotational speed of the milling wheels.

[0024] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0025] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A coal bunker cleaning device, characterized in that, It includes a rotatable platform (21) and a double-column telescopic platform (22, 23, 24) which are connected and fixed from top to bottom; The coal bunker cleaning device further includes a foldable hydraulic robotic arm (25), a working head towing rope (26) connected to the foldable hydraulic robotic arm (25), and a replaceable working head (27) fixed at the end of the working head towing rope (26); The replaceable working head (27) is detachably connected to a cleaning head and a milling head, and the cleaning head or the milling head is switched according to different working states; The double-column telescopic platform (22, 23, 24) can be telescoped up and down to control the up and down 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 for cleaning the bunker wall of the coal bunker, and the milling head is used for planing the coal bunker.

2. The coal bunker cleaning device according to claim 1, wherein The working head towing 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 driving devices and four milling heads, and two milling heads share one driving device.

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

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

6. The coal bunker cleaning device according to claim 4, wherein, The two curve hydraulic motors (32) rotate in opposite directions, and the milling wheels are in the outward planing state.

7. A method for cleaning a coal bunker, using the coal bunker cleaning device according to any one of claims 1-6, characterized in that, It includes the following steps: For the full coal bunker state, first, the double-column telescopic platform (22, 23, 24) is in the retracted state, the foldable hydraulic robotic arm (25) is in the folded state, the working head towing rope (26) is released by the winch, the double-wheel four-milling heads descend under the action of gravity and plane the coal material. Second, the double-wheel four-milling heads retract, the working head is replaced with a cleaning head, the foldable hydraulic robotic arm (25) unfolds, and the cleaning head is controlled to move horizontally to clean the expanded and wall-hanging coal material. Subsequently, the double-column telescopic platform (22, 23, 24) extends to further plane the coal bunker; For the half coal bunker state, first, the double-column telescopic platform (22, 23, 24) is in the extended state, and its length is determined according to the coal material situation. The working head towing rope (26) is released by the winch, the double-wheel four-milling heads descend under the action of gravity and plane the coal material. Second, the double-wheel four-milling heads retract, the working head is replaced with a cleaning head, the foldable hydraulic robotic arm (25) unfolds, and the cleaning head is controlled to move horizontally to clean the expanded and wall-hanging coal material. Subsequently, the double-column telescopic platform (22, 23, 24) extends further to further plane the coal bunker; For the situation of coal bunker wall sticking, the traction rope (26) of the working head is retracted by the winch, the cleaning head can be used instead of the working head (27), the rotatable platform (21) controls the overall rotation of the machine, the foldable hydraulic manipulator (25) is unfolded, the cleaning head is controlled to move horizontally, and the double-column telescopic platform (22, 23, 24) adjusts the depth position of the cleaning head in the coal bunker to achieve the cleaning of the wall-sticking coal material.

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