Dry dust removal system and open double drum mining machine
By installing dust collection discs and dust collectors on open-pit coal mining equipment, the problem of poor dust removal in open-pit coal mines has been solved, achieving efficient and environmentally friendly dust removal, which is suitable for open-pit coal mining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU COAL MINING MACHINERY (GRP) CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-16
AI Technical Summary
In open-pit coal mining, existing dust removal methods are ineffective and consume large amounts of water resources or use chemicals, posing environmental hazards and safety risks.
A dry dust removal system is adopted, which uses a dust suction disc and a first dust collector at the cutting drum to absorb dust by negative pressure, and dust collection hoods and dust collectors are installed in key parts to avoid dust pollution.
It achieves efficient dust removal, saves water and chemicals, avoids environmental pollution and safety hazards, and is suitable for various weather conditions.
Smart Images
Figure CN224363945U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mining equipment technology, and more specifically, to a dry dust removal system. Furthermore, this utility model also relates to an open-pit double-drum mining machine including the aforementioned dry dust removal system. Background Technology
[0002] Open-pit double-drum mining machines generate significant amounts of dust during operation at four locations: the cutting ends, the loading ends, the internal crusher, and the unloading area. To reduce occupational diseases among coal mine workers and improve air quality in the working environment, coal mine safety regulations impose strict requirements on dust concentration in workplaces. In open-pit coal mining, cutting-type mining equipment is generally the same as underground coal mining equipment. Dust control and removal methods in underground coal mines are based on the enclosed environment of the roadway and are largely unrelated to the mining equipment.
[0003] In open-pit coal mining, the mining environment is open, and the dust control and removal methods based on tunnel conditions in underground coal mines cannot be applied to open-pit coal mining.
[0004] Currently, open-pit mining generally still uses spray dust suppression methods. This method has poor dust suppression effect, increases the moisture content of coal and damages the bottom plate, consumes a lot of water, and is prone to freezing at low temperatures. Chemical foam and wetting agent dust suppression methods are also used, but they can easily cause harm to people and the environment when they are blown away by the wind.
[0005] In conclusion, how to achieve efficient dust removal in open-pit mining machines is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] In view of this, the purpose of this utility model is to provide a dry dust removal system. The system is designed with a dust collection disc facing the cutting drum. The first dust collector can generate negative pressure at the cutting dust collection port, which can directly absorb dust during coal cutting and prevent dust from polluting the air.
[0007] Another objective of this invention is to provide an open-pit double-drum mining machine that includes the aforementioned dry dust removal system.
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A dry dust removal system is installed on a mining machine, the dry dust removal system comprising:
[0010] The dust collection disc has a dust collection channel inside, and a number of cutting dust collection ports are provided on the surface of the dust collection disc. The cutting dust collection ports are connected to the dust collection channel, and the dust collection disc is arranged directly opposite the cutting drum of the mining machine.
[0011] A first dust collector is connected to the dust suction channel. The first dust collector is used to provide suction so that the position of the cutting dust suction port is under negative pressure.
[0012] Preferably, a shielding member extending toward the cutting roller is provided at the cutting dust suction port, and the length of the shielding member gradually increases outward in the radial direction of the dust suction disc.
[0013] Preferably, a screen is provided at the cutting dust suction port for filtering coal slag. Preferably, at least sixteen cutting dust suction ports are provided, and the at least sixteen cutting dust suction ports are evenly distributed on the edge of the surface of the dust suction disc facing the cutting roller.
[0014] Preferably, the dust collection tray has a segmented structure, and the dust collection tray includes at least two detachably connected dust collection tray assemblies.
[0015] Preferably, the thickness of the dust collection disc is in the range of 12-14mm, and a screen is provided at the dust collection port, with the mesh diameter of the screen being 20mm.
[0016] Preferably, the dust extraction channel is provided with a discharge port, and the discharge port is provided with a switch valve for periodically discharging coal slag.
[0017] Preferably, the system further includes a second dust collector and a third dust collector, which are used to absorb dust.
[0018] Preferably, it also includes a loading dust collection hood at the loading point of the mining machine, a crushing dust collection hood at the crushing point of the mining machine, and an unloading point dust collection hood at the unloading point of the mining machine. The loading dust collection hood, the crushing dust collection hood, and the unloading point dust collection hood are all connected to the fourth dust collector and the induced draft fan.
[0019] An open-pit double-drum mining machine includes a dry dust removal system, wherein the dry dust removal system is any of the aforementioned dry dust removal systems.
[0020] This utility model provides a dry dust removal system. A dust collection disc is installed directly opposite the cutting drum of a mining machine. The dust collection disc has a dust collection channel inside and a cutting dust collection port on its surface. The dust collection channel is connected to a first dust collector, which provides suction to create a negative pressure at the cutting dust collection port. This allows the dust collection disc to absorb the dust generated when the cutting drum cuts coal, preventing air pollution. The negative pressure at the cutting dust collection port can be controlled to be less than 1.5 kPa, ensuring that the dust collection disc only sucks in dust and not particulate coal slag, thus avoiding blockage. Compared to existing dust removal methods, this system does not require large amounts of water or chemical additives, effectively solves the problem of low-temperature freezing, and is suitable for winter and open-air applications. It is an environmentally friendly dust removal system. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the dust collection tray and cutting roller provided by this utility model;
[0023] Figure 2 for Figure 1 A magnified view of part A in the middle;
[0024] Figure 3 This is a front view of the open-pit double-drum mining machine provided by this utility model;
[0025] Figure 4 This is a top view of the open-pit double-drum mining machine provided by this utility model.
[0026] Figure label:
[0027] 1-Dust collection tray; 2-Dust collection channel; 3-Cutting dust collection port; 4-Cutting roller; 5-Shielding component; 6-Second dust collector; 7-Third dust collector; 8-Loading dust collection hood; 9-Crushing dust collection hood; 10-Unloading point dust collection hood; 11-Dust collection pipeline; 12-Exhaust fan. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] The core of this invention is to provide a dry dust removal system that can achieve dust removal without consuming large amounts of water or adding chemicals.
[0030] Another core aspect of this invention is to provide an open-pit double-drum mining machine that includes the aforementioned dry dust removal system.
[0031] It should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating the description of this application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0032] This application provides a dry dust removal system installed on a mining machine. The dry dust removal system includes: a dust collection disc 1 and a first dust collector.
[0033] The dust collection disk 1 has a dust collection channel 2 inside, and a number of cutting dust collection ports 3 are provided on the surface of the dust collection disk 1. The cutting dust collection ports 3 are connected to the dust collection channel 2, and the dust collection disk 1 is positioned directly opposite the cutting roller 4 of the mining machine.
[0034] The first dust collector is connected to the dust collection channel 2. The first dust collector is used to provide suction so that the position of the cutting dust collection port 3 is under negative pressure.
[0035] Specifically, the structure of the vacuum cleaner disk 1 can be found in the attached diagram. Figure 1 The overall structure is disc-shaped, and the shape of the dust collection disc 1 is adapted to the shape of the cutting roller 4. Generally, a circle is chosen. The dust collection disc 1 has a certain thickness and a dust collection channel 2 is set inside. Several cutting dust collection ports 3 are set on the surface of the dust collection disc 1. The cutting dust collection ports 3 are connected to the dust collection channel 2 and face the cutting roller 4. The dust collection channel 2 is connected to the first dust collector. The first dust collector can provide sufficient suction power so that the cutting dust collection port 3 can always be in a negative pressure state when the first dust collector is turned on. Generally, the negative pressure at the cutting dust collection port 3 is less than 1.5 kPa, so that it can only suck up dust and cannot suck up particulate coal slag, thus avoiding coal slag blockage.
[0036] Optionally, the first dust collector and the cutting drum 4 can share a set of switches, so that when the cutting drum 4 is turned on, it can cut the coal mine, and the first dust collector is turned on at the same time to remove dust. When the cutting drum 4 is turned off, cutting stops, and the first dust collector can be turned off to save energy. In addition, the first dust collector can be equipped with a delay device. When the cutting drum 4 stops, the first dust collector will turn off after a delay to ensure that the dust generated by the cutting drum 4 is fully absorbed.
[0037] Optionally, the first dust collector is connected to and used in conjunction with the fan, and the air filtered by the first dust collector is then discharged into the air under the action of the fan.
[0038] Based on the above embodiment, a shielding member 5 extending towards the cutting roller 4 is provided at the cutting dust suction port 3, and the length of the shielding member 5 gradually increases outward in the radial direction of the dust suction disc 1.
[0039] Specifically, the structure of the shielding component 5 can be found in the attached document. Figure 2 The shielding member 5 is set along the edge of the cutting dust suction port 3. The shielding member 5 is set on the end surface of the dust suction disk 1 facing the cutting roller 4. The length of the shielding member 5 on the surface perpendicular to the dust suction disk 1 gradually increases outward in the radial direction of the dust suction disk 1, thereby effectively reducing the amount of coal slag falling into the dust suction channel 2 and avoiding the phenomenon of coal slag blockage. It should be noted that the coal slag here refers to small particles with a size slightly larger than dust. The difference between coal slag and dust in this application is whether it can be sucked away by the negative pressure generated by the first dust collector.
[0040] In addition, the longest position of the shielding member 5 should be less than the distance between the dust collection disc 1 and the cutting roller 4 to avoid direct contact between the shielding member 5 and the cutting roller 4.
[0041] Based on the above embodiment, a screen is provided at the dust extraction port 3, and the screen is used to filter coal slag.
[0042] Specifically, the structure of the mesh screen can also be referenced in the appendix. Figure 2 A screen is installed at the cutting dust suction port 3. The screen can prevent coal slag from entering the dust suction channel 2 and avoid the phenomenon of coal slag blockage.
[0043] In some embodiments, at least sixteen cutting suction ports 3 are provided, and the at least sixteen cutting suction ports 3 are evenly distributed on the edge of the surface of the suction disc 1 facing the cutting roller 4.
[0044] Specifically, the cutting drum 4 cuts the coal block during operation. The cutting drum 4 can insert into the coal block; in other words, when the cutting drum 4 rotates at high speed, dust may be dispersed from various locations, as per the appendix of this application. Figure 3For example, sixteen cutting suction ports 3 need to be set on the surface of the suction disk 1. The sixteen cutting suction ports 3 are evenly distributed on the edge of the surface of the suction disk 1. The first dust collector uses a special cartridge dust collector to improve the dust removal effect.
[0045] Optionally, the cartridge dust collector is used in conjunction with the induced draft fan 12 to regulate the negative pressure at the dust collection port 3 to meet the negative pressure requirements.
[0046] In some embodiments, the vacuum disk 1 has a segmented structure, and the vacuum disk 1 includes at least two detachably connected vacuum disk assemblies.
[0047] Specifically, during the operation of the cutting drum 4, coal chunks are easily splashed, or the cutting drum 4 may shift due to excessive hardness. In either case, the dust collection disc 1 is easily damaged. Since the dust collection disc 1 is a hollow structure, when a hole appears in the dust collection disc 1, it will significantly affect the negative pressure at the cutting dust collection port 3, thereby affecting the dust removal effect of the dust collection disc 1. Therefore, when a hole appears in the dust collection disc 1, the dust collection disc 1 should be replaced in time. However, replacing the entire dust collection disc 1 will significantly increase the cost of the entire dust removal system. Therefore, the dust collection disc 1 is designed as a segmented structure, which includes at least two detachable dust collection disc components to facilitate the replacement of damaged parts. Since the dust collection disc 1 is a disc-shaped structure, the dust collection disc components have the same structure, which can further reduce costs.
[0048] In some embodiments, the thickness of the dust collection disc 1 ranges from 12 to 14 mm, and a screen is provided at the cut-off dust collection port 3, with a mesh diameter of 20 mm on the surface of the screen.
[0049] Specifically, to address the risk of the cutting ventilation duct being damaged by coal chunks, the thickness of the duct steel plate is appropriately increased to enhance its strength. Seamless steel pipes with a thickness of 12-14mm are used for fabrication, and the mesh diameter of the screen surface is 20mm, which can accurately isolate coal slag and prevent it from entering the dust collection channel 2.
[0050] In some embodiments, the dust extraction channel 2 is provided with a discharge port, and the discharge port is provided with a switch valve for periodically discharging coal slag.
[0051] Specifically, when the mining machine is equipped with two cutting rollers 4, two dust suction discs 1 are set accordingly. Therefore, the final air ducts of the two will merge and enter the dust removal pipe 11. An opening is set at the downstream of the overall air duct, and a switch valve is set at the opening to periodically release the sucked coal powder or coal slag.
[0052] Based on the above embodiments, a second dust collector 6 and a third dust collector 7 are also included, which are used to absorb dust.
[0053] Specifically, a second dust collector 6 and a third dust collector 7 are installed at the top center of the coal mining machine. The second dust collector 6 and the third dust collector 7 are cartridge dust collectors. The second dust collector 6 is used for dust control in the boom area of the coal mining machine, and the third dust collector 7 is used for dust control in other areas. Together with the dust collection disc 1 and the first dust collector, they further prevent air pollution.
[0054] Based on the above embodiments, it also includes a loading dust collection hood 8 located at the loading point of the mining machine, a crushing dust collection hood 9 located at the crushing point of the mining machine, and an unloading point dust collection hood 10 located at the unloading point of the mining machine. The loading dust collection hood 8, the crushing dust collection hood 9, and the unloading point dust collection hood 10 are all connected to the fourth dust collector and the induced draft fan 12.
[0055] Specifically, for mining machines, the loading, crushing, and unloading points are more prone to dust generation. To address the dust at these points, a customized dust collection hood is used. The dust is connected to the dust collector and induced draft fan 12 via a dust collection pipeline. After the dust-laden gas enters the dust collector's ash hopper, due to the sudden expansion of the airflow cross-section and the effect of the airflow distribution plate, some of the coarse particles in the airflow settle in the ash hopper under the action of kinetic and inertial forces. Fine dust particles with low density enter the dust filter chamber and are deposited on the surface of the filter material through a combination of Brownian diffusion and sieving effects. The purified gas enters the clean air chamber and enters the fan through the exhaust pipe, and is then discharged by the fan.
[0056] In summary, the dry dust removal system provided by this utility model, through the use of the dust collection disc 1 in conjunction with the first dust collector, can directly absorb dust at the location where dust is most severe in the mining machine, namely the cutting drum 4, preventing dust from entering the air. Customized dust collection hoods, dust collectors, and induced draft fans 12 are installed at the loading, crushing, and unloading points of the mining machine. The collected dust enters the cartridge dust collector through the flue, and the filtered air is discharged into the air under the action of the fan. The dust collected by the dust collector is transported to the coal conveyor belt through the ash conveying pipeline. It does not consume a large amount of water resources or add chemicals, and can effectively solve the problem of low temperature freezing. It is an environmentally friendly dust removal system, and also has the advantages of small size, high efficiency, low investment, and easy maintenance.
[0057] In addition to the aforementioned dry dust removal system, this utility model also provides an open-pit double-drum mining machine that includes the dry dust removal system disclosed in the above embodiments. For the structure of other parts of the open-pit double-drum mining machine, please refer to the prior art, which will not be repeated here.
[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0059] The above provides a detailed description of the dry dust removal system and open-pit double-drum mining machine provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A dry dust removal system for a mining machine, characterized in that, The dry dust removal system includes: The dust collection disc (1) has a dust collection channel (2) inside. The surface of the dust collection disc (1) is provided with a number of cutting dust collection ports (3). The cutting dust collection ports (3) are connected to the dust collection channel (2). The dust collection disc (1) is positioned opposite to the cutting drum (4) of the mining machine. The first dust collector is connected to the suction channel (2) and is used to provide suction so that the position of the cutting suction port (3) is negative pressure.
2. The dry dust removal system according to claim 1, characterized in that, A shielding member (5) extending toward the cutting roller (4) is provided at the cutting dust suction port (3), and the length of the shielding member (5) gradually increases outward in the radial direction of the dust suction disc (1).
3. The dry dust removal system according to claim 2, characterized in that, A screen is provided at the cutting dust suction port (3), and the screen is used to filter coal slag.
4. The dry dust removal system according to claim 1, characterized in that, The cutting dust suction port (3) is provided with at least sixteen ports, and the at least sixteen cutting dust suction ports (3) are evenly distributed on the edge of the surface of the dust suction disc (1) facing the cutting roller (4).
5. The dry dust removal system according to claim 1, characterized in that, The vacuum cleaner (1) has a segmented structure and includes at least two detachably connected vacuum cleaner components.
6. The dry dust removal system according to claim 1, characterized in that, The thickness of the dust collection disc (1) is in the range of 12-14mm, and a screen is provided at the cutting dust collection port (3), with a mesh diameter of 20mm on the surface of the screen.
7. The dry dust removal system according to claim 1, characterized in that, The dust extraction channel (2) is provided with a discharge port, and the discharge port is provided with a switch valve for periodically discharging coal slag.
8. The dry dust removal system according to any one of claims 1 to 7, characterized in that, It also includes a second dust collector (6) and a third dust collector (7), which are used to absorb dust.
9. The dry dust removal system according to claim 8, characterized in that, It also includes a loading dust collection hood (8) at the loading point of the mining machine, a crushing dust collection hood (9) at the crushing point of the mining machine, and an unloading point dust collection hood (10) at the unloading point of the mining machine. The loading dust collection hood (8), the crushing dust collection hood (9), and the unloading point dust collection hood (10) are all connected to the fourth dust collector and the induced draft fan (12).
10. An open-pit double-drum mining machine, comprising a dry dust removal system, characterized in that, The dry dust removal system is the dry dust removal system as described in any one of claims 1 to 9.