Arc profile high-pressure dust removal and cleaning device for coal mining machine and coal mining machine

Abstract

The application discloses a kind of arc copying high-pressure dust removal and cleaning device for coal mining machine and coal mining machine, and the arc copying high-pressure dust removal and cleaning device is assembled in the rocker arm shell and the lifting bracket of coal mining machine by the first positioning pin, the second positioning pin and screw assembly, water tank is provided in the rocker arm shell, the water inlet hole that is connected with water tank is provided in the surface of cleaning plate, and the cleaning plate is inwardly folded arc copying structure and is arranged with multiple high-pressure nozzles.When the coal mining machine is running, the arc cleaning plate automatically gathers the coal and sends it into the scraper conveyor, saving manual coal handling;The high-pressure water circuit reuses the original water supply system of the coal mining machine, and the water flow is divided into two paths, one path supplies the original spray of the rocker arm, and the other path is delivered to the multi-directional nozzle through the water inlet hole, which synchronously suppresses dust twice in the cutting area and the coal loading area.The positioning pin is matched with the retaining ring to realize precise positioning and prevent loosening, and it is convenient to disassemble and maintain.The application does not require additional power, realizes continuous operation of cutting, cleaning and loading, suppresses coal dust in the whole area, eliminates the safety hazard of manual coal shoveling underground, and improves the mining efficiency.

Description

Technical Field

[0001] This invention belongs to the field of coal mining machine technology, and particularly relates to an arc-shaped high-pressure dust removal and material cleaning device for coal mining machines and a coal mining machine. Background Technology

[0002] During underground coal mining operations, after the coal shearing machine's drum cuts the coal face, a large amount of coal and rock scatters on both sides of the scraper conveyor. The current operating method relies on workers manually shoveling the loose coal into the scraper conveyor for transfer using shovels in the support area. This method has several prominent drawbacks: Manual coal shoveling is a physically demanding task, requiring multiple workers to operate continuously at a single working face, resulting in high labor costs. Furthermore, the speed of manual coal shoveling is much lower than that of the drum coal discharge, leading to a large accumulation of loose coal and hindering the efficiency of the working face mining. Traditional coal mining machines only have native spray nozzles on the rocker arm housing, which can only reduce dust at the drum cutting point; a large amount of secondary coal dust is generated during manual coal shoveling and material loading, and the existing spray cannot cover the loading area, resulting in excessive coal dust concentration underground, which endangers the respiratory health of workers; Workers are vulnerable to injury from falling coal and rock due to prolonged close proximity to the exposed coal face; at the same time, workers are at risk of accidentally touching the equipment and being crushed or scratched while shoveling coal around the continuously operating scraper conveyor. Summary of the Invention

[0003] To at least partially solve the technical problems existing in the prior art, the present invention provides a circular arc contour high-pressure dust removal and material cleaning device for coal mining machines and a coal mining machine.

[0004] The arc-shaped high-pressure dust removal and cleaning device for coal mining machines of the present invention is fixedly installed on the rocker arm housing and lifting bracket of the coal mining machine. The arc-shaped high-pressure dust removal and cleaning device for coal mining machines includes a cleaning component, a screw component, a first positioning pin, and a second positioning pin. One end of the cleaning component is fixed to the lifting bracket through the first positioning pin, and the other end of the cleaning component is fitted with a pad. The pad abuts against the rocker arm housing and is positioned by the second positioning pin. The screw component is tightly locked to the rocker arm housing. A water tank is provided inside the rocker arm housing. A water inlet hole communicating with the water tank is opened on the contact surface between the cleaning component and the water tank cover of the rocker arm housing. The main body of the cleaning component is an inwardly converging arc-shaped cleaning plate. Multiple sets of high-pressure nozzles are provided on the cleaning component, and the high-pressure nozzles are connected to the water inlet hole.

[0005] Furthermore, in the aforementioned arc-shaped high-pressure dust removal and cleaning device for coal mining machines, retaining rings are provided in the assembly grooves of the first and second positioning pins, and the retaining rings are used to limit the axial movement of the positioning pins; the screw assembly is equipped with washers, and the cleaning assembly has countersunk holes at the positions corresponding to the screws.

[0006] Furthermore, in the above-mentioned circular arc contour high-pressure dust removal and cleaning device for coal mining machines, the high-pressure nozzles are divided into two groups. One group consists of side nozzles located on both sides of the cleaning component, with the side nozzles facing the coal wall side and the goaf side, respectively. The other group consists of end-face nozzles located on the short end face of the circular arc front end of the cleaning component, with the end-face nozzles facing the circular arc coal loading area.

[0007] Furthermore, in the aforementioned high-pressure dust removal and cleaning device for coal mining machines, the cleaning component is a streamlined, inwardly converging arc-shaped structure.

[0008] Furthermore, in the above-mentioned arc-shaped high-pressure dust removal and cleaning device for coal mining machines, the water tank is connected to the original spray water supply pipeline of the coal mining machine, the water inlet is connected to the water tank to form a parallel water circuit, and an O-ring is provided at the water inlet between the cleaning component and the water tank cover plate of the rocker arm housing.

[0009] Furthermore, in the aforementioned circular arc contour high-pressure dust removal and material cleaning device for coal mining machines, the first positioning pin and the second positioning pin limit the material cleaning component, the positioning pin bears the lateral shear force, and cooperates with the screw assembly to jointly bear the material impact load.

[0010] On the other hand, the present invention provides a coal mining machine, including a coal mining machine body and a circular arc contour high-pressure dust removal and cleaning device for the coal mining machine, wherein the circular arc contour high-pressure dust removal and cleaning device for the coal mining machine is assembled at the rocker arm of the coal mining machine.

[0011] The circular arc contour high-pressure dust removal and material cleaning device for coal mining machines and the coal mining machine of the present invention have the following advantages and beneficial effects: This invention adopts a circular arc contour coal gathering structure, directly reusing the coal mining machine's own walking power. The coal and rock cut off by the drum are automatically gathered along the circular arc surface and fed into the scraper conveyor, completely replacing the manual coal shoveling process. It eliminates the risk of worker injuries from falling rocks and mechanical injuries from the scraper conveyor, reduces the number of personnel required for the working face, and significantly improves the efficiency of coal mining. The circular arc streamline structure can avoid the vertical impact of coal and rock on the right-angle plate surface, reduce the impact load on the equipment, reduce the wear of the cleaning plate, and extend the service life of the device. The entire spray system relies entirely on the existing water tank and high-pressure water supply pipeline of the coal mining machine, without the need for additional power components such as water pumps and pipelines, and does not alter the main structure of the coal mining machine; the multi-directional high-pressure nozzles can simultaneously cover the drum cutting area, the floating coal areas on both sides, and the coal loading and gathering area, forming a dual dust suppression system with the original spray of the rocker arm, effectively suppressing secondary coal dust at the loading point, reducing the concentration of coal dust underground, meeting the requirements of coal mine safety regulations and control, and protecting the health of workers; The first and second locating pins are used to achieve precise positioning of the material clearing plate assembly, and the assembly accuracy remains unchanged after repeated disassembly and assembly. The locating pins share the impact shear force of lateral materials, reducing the stress on the screws. The retaining ring anti-displacement structure prevents vibration from loosening. The overall disassembly and assembly process is simple, and maintenance and component replacement can be quickly completed on-site underground, shortening equipment downtime for maintenance and reducing production and operation costs. The assembly structure is simple, and the equipment is easy to operate at the factory and for underground installation, with controllable manufacturing costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to the present invention; Figure 2 This is a schematic diagram of the installation structure of the arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to the present invention; Figure 3 This is a schematic diagram of the overall structure of the cleaning component of the arc-shaped high-pressure dust removal and cleaning device for coal mining machines according to the present invention; Figure 4 This is a schematic diagram of the structure of the cleaning component and the rocker arm housing fitting end of the circular arc contour high-pressure dust removal and cleaning device for coal mining machines according to the present invention.

[0013] Explanation of reference numerals in the attached figures: 1: Rocker arm housing; 11: Water tank; 2: Lifting bracket; 3: Cleaning assembly; 31: Pad; 32: Water inlet hole; 33: High-pressure nozzle; 331: Side nozzle; 332: End face nozzle; 34: Countersunk hole; 4: Screw assembly; 41: Washer; 5: First locating pin; 6: Second locating pin; 7: Retaining ring. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0015] like Figures 1 to 4 As shown, the arc-shaped high-pressure dust removal and cleaning device for coal mining machines of the present invention is fixedly installed on the rocker arm housing 1 and the lifting bracket 2 of the coal mining machine. The arc-shaped high-pressure dust removal and cleaning device for coal mining machines includes a cleaning component 3, a screw component 4, a first positioning pin 5 and a second positioning pin 6. One end of the cleaning component 3 is fixed to the lifting bracket 2 by the first positioning pin 5, and the other end of the cleaning component 3 is fitted with a pad 31. The pad 31 abuts against the rocker arm housing 1 and is positioned by the second positioning pin 6 and locked to the rocker arm housing 1 by the screw component 4. A water tank 11 is provided inside the rocker arm housing 1. A water inlet hole 32 communicating with the water tank 11 is opened on the contact surface between the cleaning component 3 and the water tank cover of the rocker arm housing 1. The main body of the cleaning component 3 is an inwardly converging arc-shaped cleaning plate. Multiple sets of high-pressure nozzles 33 are provided on the cleaning component 3. The high-pressure nozzles 33 are connected to the water inlet hole 32.

[0016] Furthermore, in the arc-shaped high-pressure dust removal and cleaning device for coal mining machines of the present invention, retaining rings 7 are provided in the assembly grooves of the first positioning pin 5 and the second positioning pin 6. The retaining rings 7 are used to limit the axial movement of the positioning pins and prevent the fasteners from loosening due to the cutting vibration of the coal mining machine. The screw assembly 4 is equipped with washers 41, and the cleaning assembly 3 is provided with countersunk holes 34 at the positions corresponding to the screws. The screws are completely sunk into the countersunk holes 34 to prevent the screws from being worn or broken due to continuous friction from falling coal.

[0017] Furthermore, in the arc-shaped high-pressure dust removal and cleaning device for coal mining machines of the present invention, the high-pressure nozzles 33 are divided into two groups. One group consists of side nozzles 331 located on both sides of the cleaning component 3, with the side nozzles 331 facing the coal wall side and the goaf side, respectively. The other group consists of end-face nozzles 332 located on the short end face of the arc front end of the cleaning component 3, with the end-face nozzles 332 facing the arc coal loading area.

[0018] Furthermore, in the arc-shaped high-pressure dust removal and material cleaning device for coal mining machines of the present invention, the material cleaning component 3 is a streamlined, inwardly converging arc-shaped structure, thereby reusing its own walking power when the coal mining machine is moving. The coal and rock cut off by the drum automatically gather towards the center along the arc surface and slide directly into the scraper conveyor, completely replacing manual coal shoveling operations.

[0019] Furthermore, in the arc-shaped high-pressure dust removal and cleaning device for coal mining machines of the present invention, the water tank 11 is connected to the original spray water supply pipeline of the coal mining machine, and the water inlet 32 ​​is connected to the water tank 11 to form a parallel water circuit. An O-ring is provided at the water inlet 32 ​​between the cleaning component 3 and the water tank cover plate of the rocker arm housing 1, so as to prevent leakage at the joint between the water inlet and the water tank cover plate. The entire spray water circuit reuses the coal mining machine's own high-pressure water supply system, and there is no need to add an additional water supply power source.

[0020] Furthermore, in the arc-shaped high-pressure dust removal and cleaning device for coal mining machines of the present invention, the first positioning pin 5 and the second positioning pin 6 limit the cleaning component 3, the positioning pin bears the lateral shear force, and cooperates with the screw component 4 to jointly bear the material impact load, and the assembly accuracy remains stable after disassembly and assembly.

[0021] On the other hand, the present invention provides a coal mining machine, including a coal mining machine body and a circular arc contour high-pressure dust removal and cleaning device for the coal mining machine, the circular arc contour high-pressure dust removal and cleaning device for the coal mining machine being assembled at the rocker arm of the coal mining machine.

[0022] Specifically, during coal mining machine operation, the machine moves along the working face using its own walking mechanism, without requiring additional power to drive the cleaning device. The streamlined arc cleaning component 3, which converges inward, moves synchronously with the rocker arm. After the scattered coal and rock come into contact with the arc surface, they are drawn inward along the arc-shaped slope under the combined action of the walking thrust and their own gravity. The arc surface guides all the skewed and accumulated floating coal to the middle of the scraper conveyor, and the coal falls directly onto the scraper chain. The scraper is pulled in a cycle, transporting the coal to the machine head at the working face. The arc-shaped streamline avoids the vertical impact of coal blocks on the plate surface, resulting in a small impact load and a significant reduction in the wear rate of the cleaning component 3. The entire process eliminates the need for workers to manually scoop coal with shovels, achieving integrated continuous operation of cutting, cleaning, and loading. During this process, high-pressure water is supplied by the coal mining machine's spray cooling system and enters the water tank 11. The water is automatically diverted to simultaneously complete dust suppression at two locations. The first water flow from the water tank 11 supplies the original built-in nozzles of the rocker arm housing 1 for initial dust suppression of the primary dust generated by the drum cutting the coal wall. The second water flow supplies the cleaning component 3 for secondary dust suppression. High-pressure water is sprayed from the left and right side nozzles 331 of the cleaning component 3, spraying one side towards the coal wall and the other side towards the goaf, covering the scattered floating coal on both sides and suppressing the dust generated by the floating coal at the edges and corners. Water is continuously sprayed from the front short end nozzle 332, aiming at the rounded coal loading area, specifically suppressing the secondary dust generated during the coal gathering and sliding process. The primary spray + multi-directional high-pressure spray of the cleaning component 3 forms a double-layer dust barrier, covering the cutting point and loading point at the same time, completely solving the problem of excessive dust during the manual coal shoveling stage, without changing the original water channel structure of the coal mining machine.

[0023] In summary, compared with the prior art, the circular arc contour high-pressure dust removal and material cleaning device and the coal mining machine of the present invention have the following advantages and beneficial effects: The present invention adopts a circular arc contour coal gathering structure, directly reuses the coal mining machine's own walking power, and the coal and rock cut off by the drum are automatically gathered along the circular arc surface and fed into the scraper conveyor, completely replacing the manual coal shoveling process; it eliminates the risk of worker injury from falling rocks and mechanical injury from the scraper conveyor, reduces the number of personnel required for working face operations, greatly improves coal mining efficiency, and the circular arc streamline structure can avoid the vertical impact of coal and rock on the right-angle plate surface, reduce the impact load on the equipment, reduce the wear of the material cleaning plate, and extend the service life of the device; The entire spray system relies entirely on the existing water tank and high-pressure water supply pipeline of the coal mining machine, without the need for additional power components such as water pumps and pipelines, and does not alter the main structure of the coal mining machine; the multi-directional high-pressure nozzles can simultaneously cover the drum cutting area, the floating coal areas on both sides, and the coal loading and gathering area, forming a dual dust suppression system with the original spray of the rocker arm, effectively suppressing secondary coal dust at the loading point, reducing the concentration of coal dust underground, meeting the requirements of coal mine safety regulations and control, and protecting the health of workers; The first and second locating pins are used to achieve precise positioning of the material clearing plate assembly, and the assembly accuracy remains unchanged after repeated disassembly and assembly. The locating pins share the impact shear force of lateral materials, reducing the stress on the screws. The retaining ring anti-displacement structure prevents vibration from loosening. The overall disassembly and assembly process is simple, and maintenance and component replacement can be quickly completed on-site underground, shortening equipment downtime for maintenance and reducing production and operation costs. The assembly structure is simple, and the equipment is easy to operate at the factory and for underground installation, with controllable manufacturing costs.

[0024] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circular arc-shaped high-pressure dust removal and cleaning device for a coal mining machine, wherein the circular arc-shaped high-pressure dust removal and cleaning device for a coal mining machine is fixedly installed on the rocker arm housing and the lifting bracket of the coal mining machine, characterized in that, The arc-shaped high-pressure dust removal and cleaning device for the coal mining machine includes a cleaning component, a screw component, a first positioning pin, and a second positioning pin. One end of the cleaning component is fixed to the lifting bracket by the first positioning pin, and the other end of the cleaning component is fitted with a pad. The pad abuts against the rocker arm housing and is positioned by the second positioning pin. The screw component is tightly locked to the rocker arm housing. A water tank is provided inside the rocker arm housing. A water inlet hole communicating with the water tank is opened on the contact surface between the cleaning component and the water tank cover of the rocker arm housing. The main body of the cleaning component is an inwardly converging arc-shaped cleaning plate. Multiple sets of high-pressure nozzles are provided on the cleaning component, and the high-pressure nozzles are connected to the water inlet hole.

2. The arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to claim 1, characterized in that, Both the first and second positioning pins have retaining rings in their assembly slots to limit axial movement of the positioning pins; the screw assembly is equipped with washers, and the cleaning assembly has countersunk holes at the positions corresponding to the screws.

3. The arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to claim 1, characterized in that, The high-pressure nozzles are divided into two groups. One group consists of side nozzles located on both sides of the cleaning assembly, with the side nozzles facing the coal wall side and the goaf side, respectively. The other group consists of end-face nozzles located on the short end face of the arc front end of the cleaning assembly, with the end-face nozzles facing the arc coal loading area.

4. The arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to claim 1, characterized in that, The cleaning component is a streamlined, inwardly tapering arc-shaped structure.

5. The arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to claim 1, characterized in that, The water tank is connected to the original spray water supply pipeline of the coal mining machine, and the water inlet is connected to the water tank to form a parallel water circuit. An O-ring is provided at the water inlet between the cleaning component and the water tank cover plate of the rocker arm housing.

6. The arc-shaped high-pressure dust removal and material cleaning device for coal mining machines according to claim 1, characterized in that, The first and second positioning pins limit the material clearing assembly. The positioning pins bear the lateral shear force and cooperate with the screw assembly to jointly bear the impact load of the material.

7. A coal mining machine, characterized in that: The invention includes a coal mining machine body and a circular arc-shaped high-pressure dust removal and cleaning device for a coal mining machine as described in any one of claims 1 to 6, wherein the circular arc-shaped high-pressure dust removal and cleaning device for a coal mining machine is mounted on the rocker arm of the coal mining machine.

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