Coal bunker cleaning device, coal bunker cleaning method and cleaning head

Abstract

The invention provides a coal bunker cleaning device, a coal bunker cleaning method and a coal bunker cleaning head, the coal bunker cleaning device comprises a multi-stage hydraulic telescopic cylinder and a foldable mechanical hydraulic arm, through control of the hydraulic telescopic cylinder and the foldable mechanical hydraulic arm, automatic cleaning of a coal bunker can be achieved, the manual burden is reduced, in addition, the invention further provides the coal bunker cleaning head, and the coal bunker cleaning head is convenient to use. Through cooperation of the expansion hammer, the vibration core teeth and the pioneer drill, the bunker wall is cleaned in a first-stage drilling, second-stage vibration and third-stage expansion mode, and efficient and thorough cleaning work of the coal bunker is completed.

Description

Technical Field

[0001] The present invention relates to the field of coal bunker cleaning, and more specifically, to a coal bunker cleaning device, a coal bunker cleaning method and a cleaning head for cleaning coal bunker blockage, arching, wall sticking and the like. Background Art

[0002] In coal mine production, coal bunkers are the key link in the transportation and storage of raw coal, and their stable operation is of vital importance. The common design of coal bunkers is a vertical cylindrical plus a conical funnel type. Underground coal bunkers are mostly single units with a capacity of 100-600 tons, and ground coal bunkers are mostly row-by-row, with a single bunker capacity of 800-1200 tons. When coal bunkers fail or have accidents, 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 coal bunker accidents are lower-mouth bunker collapse accidents, and the main failures include blockage, arching, and wall sticking. Figure 1 The specific circumstances and forms of the above-mentioned coal bunker failures are shown.

[0003] In the prior art, the methods for handling coal bunker failures are mainly manual handling, explosive blasting, or arch breaker handling, but the above 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, it can cause harmful gas explosions and cause serious accidents if not handled with care. The arch breaker handling 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 work efficiency, high risk factor, 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, a coal bunker cleaning method and a cleaning head to solve the problems of low working efficiency and incomplete cleaning when cleaning the coal bunker in the prior art.

[0005] According to a first aspect of the present invention, there is provided a coal bunker cleaning device, comprising a rotatable platform, a multi-stage hydraulic telescopic cylinder, a first foldable mechanical hydraulic arm, a single-stage hydraulic telescopic cylinder and a replaceable working head connected in sequence from top to bottom, the replaceable working head being detachably connected to a cleaning head and a milling head, and the cleaning head or the milling head being switched according to different working states; the coal bunker cleaning device also comprises a second foldable mechanical hydraulic arm, the extension direction of the second foldable mechanical hydraulic arm is perpendicular to the multi-stage hydraulic telescopic cylinder, a cleaning head is arranged at the end of the second foldable mechanical hydraulic arm, the cleaning head is used for cleaning the coal bunker wall, and the milling head is used for planing and milling the coal bunker.

[0006] Based on the above technical solution, the present invention can also make the following improvements.

[0007] Optionally, the cleaning head includes a cycloid hydraulic motor, and an expansion hammer, a core vibrating tooth and a pilot drill are fixed around the cycloid hydraulic motor.

[0008] Optionally, the vibration core teeth are composed of a plurality of superimposed gears, and the expansion hammer is fixed on the shaft by a plurality of iron balls connected by steel wire ropes.

[0009] Optionally, it also includes a placement box, the bottom of which is connected to a cycloidal hydraulic motor via a soft steel wire rope.

[0010] According to a second aspect of the present invention, a coal bunker cleaning method is provided, using the above-mentioned coal bunker cleaning device, the coal bunker cleaning method comprising the following steps: When the coal bunker is full, first, the multi-stage hydraulic telescopic cylinder is in a retracted state, the second foldable mechanical hydraulic arm and the first foldable mechanical hydraulic arm are in a folded state, the milling head rotates, and the single-stage hydraulic telescopic cylinder slowly extends to perform milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinder slowly extends to perform milling work on the coal bunker. At the same time, the second foldable mechanical hydraulic arm is unfolded, and the cleaning head equipped at the end is expanded and the wall-hanging coal is cleaned. After expanding to a certain diameter, the first foldable mechanical hydraulic arm is unfolded and further penetrates into the coal bunker until the coal bunker is unblocked. For the half-storage state of the coal bunker, firstly, the multi-stage hydraulic telescopic cylinder is in the extended state, and the extension length of the hydraulic cylinder is determined by the coal material condition. The second foldable mechanical hydraulic arm and the first foldable mechanical hydraulic arm are in the folded state, the milling head rotates, and the single-stage hydraulic telescopic cylinder slowly extends to perform the milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinder slowly extends to perform further milling work on the coal bunker. At the same time, the second foldable mechanical hydraulic arm is unfolded, and the cleaning head equipped at the end is expanded and the wall-hanging coal is cleaned. After expanding to a certain diameter, the first foldable mechanical hydraulic arm is unfolded and further penetrates into the coal bunker until the coal bunker is unblocked. For the situation of coal bunker hanging on the wall, the multi-stage hydraulic telescopic cylinder is in the extended state, and the extension length of the hydraulic telescopic cylinder is determined by the coal situation. The first foldable mechanical hydraulic arm is in the unfolded state. At the same time, the second foldable mechanical hydraulic arm is unfolded, and the cleaning head is driven by the inner curve hydraulic motor to clean the coal hanging on the bunker wall.

[0011] According to a third aspect of the present invention, there is provided a coal bunker wall cleaning head, comprising a cycloidal hydraulic motor, the periphery of which is fixed with an expansion hammer, a seismic core tooth and a pilot drill; the seismic core tooth is composed of a plurality of superimposed gears, and the expansion hammer is fixed on a shaft by a plurality of iron balls connected by steel wire ropes.

[0012] The coal bunker cleaning solution designed in the present invention can accurately and efficiently solve a series of thorny problems such as coal bunker jams, arching, and wall sticking. Compared with traditional processing methods, the present invention can greatly shorten the fault processing time and effectively reduce production stagnation caused by coal bunker failures. It does not require manual operation and avoids workers working inside the coal bunker for a long time. Further, in conjunction with the cleaning head and double-wheel four-milling head designed in the present invention, the cleaning efficiency of the coal bunker can be effectively improved, and the cleaning is more complete and thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of various coal bunker faults; Figure 1 a is a schematic diagram of the jam phenomenon. Figure 1 b is a schematic diagram of the arch phenomenon. Figure 1 c is a schematic diagram of wall sticking phenomenon; Figure 2 This is a schematic diagram of a coal bunker cleaning device according to Example 1; Figure 3 This is a partial enlarged view of the coal bunker cleaning device of Example 1; Figure 4 It is a schematic diagram of the overall structure of the cleaning head; Figure 5 This is a top view of the overall structure of the cleaning head; Figure 6 This is a cross-sectional view of the cleaning head.

[0014] In the accompanying drawings, the reference numerals represent the following components: 11, winch, 12, rotatable platform, 13, 14, 15, 16, 111, multi-stage hydraulic telescopic cylinder, 17, 19, 110, two-section foldable hydraulic telescopic arm, 18, cleaning head, 112, 113, 114, three-section foldable hydraulic telescopic arm, 115, single-stage hydraulic telescopic arm, 116, replaceable working head, 31, flange joint, 32, inner 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, cycloid hydraulic motor, 43, expansion hammer, 44, pilot drill, 45, seismic core tooth, 46, soft steel wire rope, 47, placement box. DETAILED DESCRIPTION

[0015] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, the technical features in the various embodiments or single embodiments provided by the present invention can be arbitrarily combined with each other to form a feasible technical solution. This combination is not subject to the constraints of the sequence of steps and / or the structural composition mode, but must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. Embodiment 1

[0016] like Figure 2-3 As shown, the coal bunker cleaning device provided by the present invention includes a rotatable platform 12 connected to the winch 11 in the vertical direction, and a multi-stage hydraulic telescopic cylinder is arranged on the rotatable platform 12. The multi-stage hydraulic telescopic cylinder includes hydraulic telescopic cylinders 13, 14, 15, 16 and 111 which are connected in sequence from top to bottom. The hydraulic telescopic cylinder 13 is connected to the rotatable platform 12. The shortest length of the hydraulic telescopic cylinder is 3.5 meters and the longest can reach 11.5 meters. When working, the multi-stage hydraulic cylinder can realize automatic extension and retraction, so that the entire coal bunker cleaning device can initially penetrate into the coal bunker for operation.

[0017] In the horizontal direction, it includes two two-section foldable mechanical hydraulic arms symmetrically arranged on both sides of the multi-stage hydraulic telescopic cylinder. The two-section foldable hydraulic arms include hydraulic arms 17, 19 and 110 from the inside to the outside. A cleaning head 18 is provided at the end of the outermost hydraulic arm 110. The cleaning head 18 can be used to clean the warehouse wall. When working, the two-section foldable mechanical hydraulic arms are raised and lowered by a winch. The maximum length can reach 4 meters to meet the cleaning needs of warehouse walls of different heights.

[0018] Three-section foldable mechanical hydraulic arms are fixedly connected to the end of the hydraulic telescopic cylinder 111. The three-section foldable mechanical hydraulic arms include mechanical hydraulic arms 112, 113 and 114 from top to bottom. The mechanical hydraulic arm 112 is fixedly connected to the end of the hydraulic telescopic cylinder 111. The final mechanical hydraulic arm 114 of the three-section foldable mechanical hydraulic arms is connected to the hydraulic telescopic cylinder 115. The maximum length of the three-section foldable mechanical hydraulic arms can reach 12.5 meters, which allows the coal bunker cleaning device to go deep into the coal bunker for cleaning. The hydraulic telescopic cylinder 115 is fixedly connected with a replaceable working head 116. The replaceable working head can be fixedly connected to the double-wheel four-milling head and the cleaning head 18. During operation, the double-wheel four-milling head or the cleaning head 18 can be selected according to the cleaning needs. The specific fixing and disassembly method can select the existing method, such as connecting through a flange joint. This is the prior art and will not be repeated here.

[0019] The coal bunker cleaning device of the present invention can select different cleaning methods according to different working conditions of the coal bunker.

[0020] When the coal bunker is full, firstly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, 111 are in a retracted state, the two-section foldable hydraulic telescopic arms 17, 19, 110 and the three-section foldable hydraulic telescopic arms 112, 113, 114 are in a folded state, the double-wheel four-milling head rotates, and the hydraulic telescopic cylinder 115 slowly extends out to perform the sectioning and milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, 111 slowly extend out to perform the sectioning and milling work on the coal bunker. At the same time, the two-section foldable hydraulic telescopic arms 17, 19, 110 are unfolded, and the cleaning head 18 equipped at the end is expanded and the wall-hanging coal is cleaned. After expanding to a certain diameter, the three-section foldable hydraulic telescopic arms 112, 113, 114 are unfolded and further penetrate into the coal bunker until the coal bunker is unblocked. During this process, the double-wheel four-milling head repeatedly probes in and out to avoid the coal after sectioning and milling blocking the working channel.

[0021] For the half-bin state of the coal bunker, firstly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, 111 are in the extended state, and the extension length of the hydraulic cylinders is determined according to the coal material conditions. The two-section foldable hydraulic telescopic arms 17, 19, 110 and the three-section foldable hydraulic telescopic arms 112, 113, 114 are in the folded state, the double-wheel four-milling head rotates, and the hydraulic telescopic cylinder 115 slowly extends out to perform the sectioning and milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, 111 slowly extend out to further section the coal bunker. At the same time, the two-section foldable hydraulic telescopic arms 17, 19, 110 are unfolded, and the cleaning head 18 equipped at the end is expanded and the wall-hanging coal is cleaned. After expanding to a certain diameter, the three-section foldable hydraulic telescopic arms 112, 113, 114 are unfolded to further penetrate into the coal bunker until the coal bunker is unblocked. During this process, the double-wheel four-milling head will repeatedly drill in and out to avoid the coal material after sectioning and milling blocking the working channel.

[0022] For the coal bunker hanging on the wall, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, and 111 are in the extended state, and the extension length of the hydraulic telescopic cylinders is determined according to the coal conditions. The three-section foldable hydraulic telescopic arms 112, 113, and 114 are in the unfolded state. At the same time, the two-section foldable hydraulic telescopic arms 17, 19, and 110 are unfolded, and the cleaning head 18 is driven by the inner curve hydraulic motor 17, and the "first-stage drilling, second-stage vibration, and third-stage expansion" method is adopted to clean the coal hanging on the bunker wall. Embodiment 2

[0023] like Figure 4-6 As shown, the cleaning head structure of the present invention can be fixed to the end of the hydraulic arm 110, and can also be fixed to the replaceable working head 116. The cleaning head of the present invention has an appearance similar to a lotus lamp, and therefore, is also called a lotus lamp faucet.

[0024] See also Figure 6 The cleaning head described in the present invention specifically includes a connecting flange 41 located at the upper part, and the connecting flange 41 is used to be fixedly connected to the hydraulic arm and the replaceable working head. A placement box 47 is set at the lower part of the flange. The placement box 47 is used to place various detection and control components to detect and control the operation of the cleaning head, such as power supply, motor controller and other components. The bottom of the placement box 47 is connected to three cycloid hydraulic motors 42 in sequence through soft steel wire ropes. The periphery of the cycloid hydraulic motor is fixed with an expansion hammer 43, a core vibration tooth 45 and a pilot drill 44 from top to bottom in sequence. The pilot drill 44 is conical with the cone angle facing downward. The three cycloid hydraulic motors control the operation of the pilot drill 44, the core vibration tooth 45 and the expansion hammer 43 respectively.

[0025] Furthermore, the vibration core tooth 45 is composed of three superimposed gears, which are controlled by a cycloidal hydraulic motor to perform axial vibration. The expansion hammer 43 is fixed on the shaft by a plurality of iron balls connected by steel wire ropes, and is shaped like a meteor hammer. The expansion hammer 43 is driven by a cycloidal hydraulic motor to perform axial rotation. During the rotation, the iron balls expand outward due to the centrifugal force and strike the coal bunker wall in all directions.

[0026] When in use, the pioneer drill works first, driven by the first cycloid hydraulic motor, and realizes the drilling function through axial rotation, successfully drilling into the stubborn materials hanging on the wall of the coal bunker, opening a channel for subsequent cleaning work, and then the second cycloid hydraulic motor controls the vibration core tooth 45 to work and perform axial vibration. During the vibration process, the gear is in close contact with the coal material on the bunker wall, and the high-frequency vibration can effectively shake off the material attached to the coal bunker wall, realizing efficient cleaning. Finally, the third cycloid hydraulic motor controls the expansion hammer 43 to work, and the expansion hammer 43 makes axial rotation. During the rotation process, the iron ball expands outward due to the action of centrifugal force, and strikes the coal bunker wall in all directions, further cleaning the residual materials and ensuring that the coal bunker wall is thoroughly cleaned. The three sections are controlled by different cycloid hydraulic motors respectively, and the bunker wall is cleaned in the "first-stage drilling, second-stage vibration, and third-stage expansion" method, which accurately realizes their respective functions and works in coordination to ensure the efficiency and quality of bunker wall cleaning.

[0027] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0028] 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 equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A coal bunker cleaning device, characterized in that: It comprises a rotatable platform (12), a multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111), a first foldable mechanical hydraulic arm (112, 113, 114), a single-stage hydraulic telescopic cylinder (115), and a replaceable working head (116) which are connected in sequence from top to bottom; The replaceable working head (116) is detachably connected to the cleaning head and the milling head, and the cleaning head or the milling head is switched according to different working states; The coal bunker cleaning device further comprises a second foldable mechanical hydraulic arm (17, 19, 110), the extension direction of the second foldable mechanical hydraulic arm (17, 19, 110) being perpendicular to the multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111), and a cleaning head (18) being provided at the end of the second foldable mechanical hydraulic arm (17, 19, 110); The cleaning head is used for cleaning the coal bunker wall, and the milling head is used for planing and milling the coal bunker.

2. The coal bunker cleaning device according to claim 1, characterized in that: The cleaning head includes a cycloid hydraulic motor (42), and an expansion hammer (43), a core vibration tooth (45) and a pilot drill (44) are fixed around the cycloid hydraulic motor.

3. The coal bunker cleaning device according to claim 2, characterized in that: The vibration core teeth (45) are composed of a plurality of superimposed gears, and the expansion hammer (43) is fixed on a shaft by connecting a plurality of iron balls with steel wire ropes.

4. The coal bunker cleaning device according to claim 2, characterized in that: It also includes a placement box (47), the bottom of which is connected to the cycloid hydraulic motor (42) via a soft steel wire rope.

5. A coal bunker cleaning method, using the coal bunker cleaning device according to any one of claims 1 to 4, characterized in that: The following steps are involved: When the coal bunker is full, first, the multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111) is in a retracted state, the second foldable mechanical hydraulic arm (17, 19, 110) and the first foldable mechanical hydraulic arm (112, 113, 114) are in a folded state, the milling head rotates, and the single-stage hydraulic telescopic cylinder (115) slowly extends to perform milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111) slowly extends to perform milling work on the coal bunker. At the same time, the second foldable mechanical hydraulic arm (17, 19, 110) is unfolded, and the cleaning head (18) equipped at the end is expanded and wall-mounted coal is cleaned. After expanding to a certain diameter, the first foldable mechanical hydraulic arm (112, 113, 114) is unfolded to further penetrate into the coal bunker until the coal bunker is unblocked. When the coal bunker is in a half-bin state, first, the multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111) is in an extended state, and the extension length of the hydraulic cylinder is determined according to the coal material condition. The second foldable mechanical hydraulic arm (17, 19, 110) and the first foldable mechanical hydraulic arm (112, 113, 114) are in a folded state, the milling head rotates, and the single-stage hydraulic telescopic cylinder (115) is slowly extended to perform milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111) is slowly extended to perform further milling work on the coal bunker. At the same time, the second foldable mechanical hydraulic arm (17, 19, 110) is unfolded, and the cleaning head (18) equipped at the end is expanded and wall-mounted coal is cleaned. After expanding to a certain diameter, the first foldable mechanical hydraulic arm (112, 113, 114) is unfolded to further penetrate into the coal bunker until the coal bunker is unblocked. In the case of coal bunker wall hanging, the multi-stage hydraulic telescopic cylinders (13, 14, 15, 16, 111) are in an extended state, the extension length of the hydraulic telescopic cylinders is determined according to the coal material conditions, the first foldable mechanical hydraulic arm (112, 113, 114) is in an unfolded state, and at the same time, the second foldable mechanical hydraulic arm (17, 19, 110) is unfolded, and the cleaning head (18) is driven by the inner curve hydraulic motor (32) to clean the coal hanging on the bunker wall.

6. A coal bunker wall cleaning head, characterized in that: The cleaning head comprises a cycloidal hydraulic motor (42), and an expansion hammer (43), a core vibration tooth (45) and a pilot drill (44) are fixed around the cycloidal hydraulic motor; the core vibration tooth (45) is composed of a plurality of superimposed gears, and the expansion hammer (43) is fixed on a shaft by a steel wire rope connected to a plurality of iron balls.

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