Coal bunker cleaning device and cleaning head

Abstract

The utility model provides a coal bunker cleaning device 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 the control of the hydraulic telescopic cylinder and the foldable mechanical hydraulic arm, the coal bunker can be automatically cleaned, the burden of workers is reduced, in addition, the utility model 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] This utility model relates to the field of coal bunker cleaning, and more specifically, to a coal bunker cleaning device and cleaning head 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 cleaning 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, a multi-stage hydraulic telescopic cylinder, a first foldable mechanical hydraulic arm, a single-stage hydraulic telescopic cylinder, and a replaceable working head connected sequentially from top to bottom. The replaceable working head is detachably connected to a cleaning head and a milling head, and the cleaning head or the milling head can be switched according to different working states. The coal bunker cleaning device further includes a second foldable mechanical hydraulic arm, the extension direction of which is perpendicular to the multi-stage hydraulic telescopic cylinder. A cleaning head is provided at the end of the second foldable mechanical hydraulic arm. 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 cleaning head cycloidal hydraulic motor has an expansion hammer, a core tooth, and a pilot drill fixed around its periphery.

[0008] Optionally, the vibrating core teeth are composed of multiple stacked gears, and the expansion hammer is fixed on the shaft by multiple iron balls connected by steel wire ropes.

[0009] Optionally, a placement box is also included, 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 wall cleaning head is provided, comprising a cycloidal hydraulic motor, wherein an expansion hammer, a vibrating core tooth, and a pilot drill are fixed around the periphery of the cycloidal hydraulic motor; the vibrating core tooth is composed of multiple stacked gears, and the expansion hammer is fixed on a shaft by multiple iron balls connected by steel wire ropes.

[0011] 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 cleaning head and double-wheel four-milling head designed in this utility model, the cleaning efficiency of the coal bunker can be effectively improved, and the cleaning can be more complete and thorough. Attached Figure Description

[0012] 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;

[0013] Figure 2 This is a schematic diagram of the coal bunker cleaning device in Example 1;

[0014] Figure 3 This is a partial enlarged view of the coal bunker cleaning device in Example 1;

[0015] Figure 4 A schematic diagram of the overall structure of the cleaning head;

[0016] Figure 5 A top view of the overall structure of the head;

[0017] Figure 6 To clean up the head section view.

[0018] In the attached 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 boom; 18. Cleaning head; 112, 113, 114. Three-section foldable hydraulic telescopic boom; 115. Single-stage hydraulic telescopic boom; 116. 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

[0019] 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

[0020] like Figure 2-3 As shown, the coal bunker cleaning device provided by this utility model includes a rotatable platform 12 connected to a winch 11 in the vertical direction. A multi-stage hydraulic telescopic cylinder is installed on the rotatable platform 12. The multi-stage hydraulic telescopic cylinder includes hydraulic telescopic cylinders 13, 14, 15, 16 and 111 connected 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. During operation, the multi-stage hydraulic cylinder can automatically extend and retract, so that the entire coal bunker cleaning device can initially penetrate into the coal bunker for operation.

[0021] In the horizontal direction, there are two two-section foldable mechanical hydraulic arms symmetrically arranged on both sides of the multi-stage hydraulic telescopic cylinder. The two foldable hydraulic arms include hydraulic arms 17, 19 and 110 from the inside to the outside. The end of the outermost hydraulic arm 110 is provided with a cleaning head 18, which can clean the bin wall. During operation, the two foldable mechanical hydraulic arms are raised and lowered by a winch. The maximum length can reach 4 meters to meet the cleaning needs of bin walls of different heights.

[0022] Three foldable mechanical hydraulic arms are fixedly connected to the end of the hydraulic telescopic cylinder 111. The three foldable mechanical hydraulic arms, from top to bottom, include mechanical hydraulic arms 112, 113, and 114. 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 foldable mechanical hydraulic arms is connected to the hydraulic telescopic cylinder 115. The maximum length of the three foldable mechanical hydraulic arms can reach 12.5 meters, allowing the coal bunker cleaning device to easily penetrate into the coal bunker for cleaning. A replaceable working head 116 is fixedly connected to the hydraulic telescopic cylinder 115. 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 to be connected according to the cleaning needs. The specific fixing and disassembly methods can be selected from existing methods, such as connecting through flange joints. This is existing technology and will not be described in detail here.

[0023] The coal bunker cleaning device of this utility model can select different cleaning methods according to different working conditions of the coal bunker.

[0024] When the coal bunker is full, firstly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, and 111 are in a retracted state, and the two-section foldable hydraulic telescopic arms 17, 19, and 110 and the three-section foldable hydraulic telescopic arms 112, 113, and 114 are in a folded state. The dual-wheel four-milling head rotates, and the hydraulic telescopic cylinder 115 slowly extends to perform milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, and 111 slowly extend to perform milling work on the coal bunker. At the same time, the two-section foldable hydraulic telescopic arms 17, 19, and 110 unfold, and the cleaning head 18 at the end performs expansion and wall cleaning work. After expanding to a certain diameter, the three-section foldable hydraulic telescopic arms 112, 113, and 114 unfold to further penetrate into the coal bunker until the coal bunker is cleared. During this process, the dual-wheel four-milling head repeatedly probes in and out to prevent the milled coal from blocking the working channel.

[0025] When the coal bunker is in a half-bunker state, firstly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, and 111 are extended, with the extension length depending on the coal material. The two-section foldable hydraulic telescopic arms 17, 19, and 110 and the three-section foldable hydraulic telescopic arms 112, 113, and 114 are folded. The dual-wheel four-milling head rotates, and the hydraulic telescopic cylinder 115 slowly extends to perform milling work on the coal bunker. Secondly, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, and 111 slowly extend to perform further milling work on the coal bunker. At the same time, the two-section foldable hydraulic telescopic arms 17, 19, and 110 unfold, and the cleaning head 18 at the end expands and cleans the coal material adhering to the wall. After expanding to a certain diameter, the three-section foldable hydraulic telescopic arms 112, 113, and 114 unfold to further penetrate into the coal bunker until the coal bunker is cleared. During this process, the dual-wheel four-milling head will repeatedly drill in and out to prevent the milled coal material from blocking the working channel.

[0026] For coal clinging to the walls of the bunker, the multi-stage hydraulic telescopic cylinders 13, 14, 15, 16, and 111 are in the extended state, with the extension length depending on the coal condition. The three-section foldable hydraulic telescopic arms 112, 113, and 114 are in the unfolded state, while the two-section foldable hydraulic telescopic arms 17, 19, and 110 are unfolded. The cleaning head 18 is driven by the inner curve hydraulic motor 17 and uses a "first-stage drilling, second-stage vibration, and third-stage expansion" method to clean the coal clinging to the bunker walls. Example 2

[0027] like Figure 4-6 As shown, this is the cleaning head structure of the present invention. It can be fixed to the end of the hydraulic arm 110 or to the replaceable working head 116. The cleaning head of the present invention is similar in shape to a lotus lamp, and therefore is also called a lotus lamp head.

[0028] See Figure 6 The cleaning head described in this utility model specifically includes a connecting flange 41 located at the top, which is used to fix and connect to the hydraulic arm and the replaceable working head. A placement box 47 is provided at the bottom of the flange, which 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. Three cycloidal hydraulic motors 42 are connected to the bottom of the placement box 47 in sequence by soft steel wire rope. An expansion hammer 43, a vibrating core tooth 45 and a pilot drill 44 are fixed in sequence from top to bottom around the periphery of the cycloidal hydraulic motors. The pilot drill 44 is conical and the cone angle is downward. The three cycloidal hydraulic motors control the operation of the pilot drill 44, the vibrating core tooth 45 and the expansion hammer 43 respectively.

[0029] Furthermore, the vibrating core tooth 45 consists of three superimposed gears, which are controlled by a cycloidal hydraulic motor to vibrate axially. The expansion hammer 43 is made of multiple iron balls fixed on the shaft by steel wire ropes, resembling a meteor hammer. The expansion hammer 43 is driven by a cycloidal hydraulic motor to rotate axially. During the rotation, the iron balls expand outward due to centrifugal force, striking the coal bunker wall from all directions.

[0030] In operation, the pioneer drill works first, driven by the first cycloidal hydraulic motor. Through axial rotation, it achieves the drilling function, successfully drilling into the stubborn material adhering to the coal bunker wall, opening a channel for subsequent cleaning work. Then, the second cycloidal hydraulic motor controls the vibrating core gear 45 to work, performing axial vibration. During the vibration, 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 adhering to the coal bunker wall, achieving efficient cleaning. Finally, the third cycloidal hydraulic motor controls the expansion hammer 43 to work. The expansion hammer 43 rotates axially. During the rotation, the iron ball expands outward due to centrifugal force, striking the coal bunker wall from all directions, further cleaning the residual material and ensuring that the coal bunker wall is thoroughly cleaned. The three stages are controlled by different cycloidal hydraulic motors, using the "first stage drilling, second stage vibration, and third stage expansion" method to clean the bunker wall, accurately achieving their respective functions and working together to ensure the efficiency and quality of the bunker wall cleaning.

[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 (12) connected from top to bottom, multi-stage hydraulic telescopic cylinders (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). The replaceable working head (116) 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 coal bunker cleaning device also includes a second foldable mechanical hydraulic arm (17, 19, 110), the extension direction of which is perpendicular to the multi-stage hydraulic telescopic cylinder (13, 14, 15, 16, 111), and a cleaning head (18) is provided at the end of the second foldable mechanical hydraulic arm (17, 19, 110). 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 cleaning head cycloidal hydraulic motor (42) is surrounded by an expansion hammer (43), a core tooth (45), and a pilot drill (44).

3. The coal bunker cleaning device according to claim 2, characterized in that, The vibrating core tooth (45) is composed of multiple superimposed gears, and the expansion hammer (43) is fixed on the shaft by multiple iron balls connected by steel wire rope.

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 a cycloidal hydraulic motor (42) via a soft steel wire rope.

5. A coal bunker wall cleaning head, characterized in that, The cleaning head includes a cycloidal hydraulic motor (42), and a periphery of the cycloidal hydraulic motor is fixed with an expansion hammer (43), a vibrating core tooth (45), and a pilot drill (44); the vibrating core tooth (45) is composed of multiple stacked gears, and the expansion hammer (43) is fixed on a shaft by multiple iron balls connected by steel wire ropes.

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