Fully mechanized coal mining face hydraulic support dust removal device

Abstract

The invention relates to a fully mechanized coal mining face hydraulic support dust removal device and belongs to the field of coal mine dust prevention. The side suction device is arranged at a gap between every two adjacent hydraulic supports and comprises a plurality of slot type side suction ports which are sequentially arranged, the dust outlet ends of the slot type side suction ports are communicated through a dust suction pipeline, and one end of the dust suction pipeline is sequentially connected with a dust removal unit, a dust collection unit and a power unit for driving dust particles to be sucked in. Dust particles generated when the hydraulic support descends and moves the support sequentially pass through the slot type side suction port, the dust suction pipeline and the dust removal unit to enter the dust collection unit. The dust removal device can be suitable for different mining heights, and different from a previous hydraulic support closed dust control device which only carries dust to a goaf, the dust removal device can collect and treat the dust in a centralized mode, and secondary pollution cannot be caused; meanwhile, spray dust falling is avoided, and the problems that spray dust falling is greatly influenced by water amount, and a nozzle is prone to being blocked are thoroughly solved.

Description

Technical Field

[0001] The invention belongs to the field of coal mine dust prevention and control, and relates to a hydraulic support dust removal device for a fully mechanized mining working face. Background Art

[0002] Dust is one of the six major hazards in coal mines. Due to its physical and chemical properties, dust is very likely to explode when it reaches a certain concentration, seriously endangering the lives of miners. At the same time, long-term work in dusty places greatly increases the risk of miners suffering from silicosis, seriously affecting the physical and mental health of miners. The main source of dust in the human-shaped area of the large-height fully-mechanized mining face is the lowering of hydraulic supports and the shifting of frames. Since the personnel in the large-height fully-mechanized mining face walk behind the support columns, the dust generated by the lowering of the support columns and the shifting of the frames has a direct impact on the personnel in the work area, and effective control is urgently needed.

[0003] At present, the main dust reduction measure for the dust generated by the support column lowering and frame moving is spray dust reduction. However, due to the large support area of the fully mechanized mining face with large mining height and the wide distribution range of the collapsed dust, spray dust reduction requires increased water control. According to the experience of traditional spray dust reduction, the effect of spray dust reduction is greatly affected by the amount of water, and the nozzle is easily blocked, so the use effect is not good. In addition, in the dust control of hydraulic support column lowering and frame moving, a support closed dust control device has been developed, which can achieve effective physical sealing of the gap between adjacent side guard plates of the hydraulic support and directly introduce dust into the goaf. Although the device can be connected, it was found in the application process that the device is very unadaptable to the fluctuation of mining height. It is generally suitable for mining heights above 6.5m, but it is still not universal. It has poor adaptability to mining heights of 6.5m to 4.5m, and the closed dust control effect is poor. At the same time, the device life is not long, and it is generally damaged in a few days; and it is basically not applicable to mining heights below 4.5m. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a dust removal device for a hydraulic support of a comprehensive mining working face to solve the problems that spray dust reduction is greatly affected by the amount of water, the nozzle is easily blocked resulting in poor dust reduction effect, and the support closed dust control device has poor adaptability to different mining heights.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A dust removal device for a hydraulic support of a comprehensive mining working face is arranged in the gap between two adjacent hydraulic supports, and includes a plurality of slit-type side suction ports arranged in sequence. The dust outlet end of each slit-type side suction port is connected through a dust suction pipe, and the end of the dust suction pipe away from the slit-type side suction port is connected with a dust removal unit and a dust collecting unit in sequence; the dust and gangue particles generated by the hydraulic support when the column is lowered and the frame is moved enter the dust collecting unit in sequence through the slit-type side suction port, the dust suction pipe and the dust removal unit.

[0007] Optionally, a power unit is provided on the dust suction pipeline to drive dust and gangue particles to be sucked into the dust suction pipeline.

[0008] Optionally, the power unit is a shaftless high-speed fan, and the power source adopts 127V alternating current underground or emulsion liquid in the fully-mechanized mining face.

[0009] Optionally, the slotted side suction port is aligned with the gap between adjacent hydraulic supports.

[0010] Optionally, a side guard plate is provided on the hydraulic support, and the dust removal device is arranged on each side guard plate and located on the opposite surface of the side guard plates of adjacent hydraulic supports.

[0011] Optionally, along the length direction of the hydraulic support, a plurality of the slotted side suction ports cover the gap between adjacent hydraulic supports.

[0012] Optionally, the dust suction pipeline is arranged obliquely downward along the direction in which dust and gangue particles enter, so as to facilitate the entry of dust and gangue particles.

[0013] Optionally, the dust collection unit is arranged below the dust removal unit to facilitate the entry of dust or gangue particles.

[0014] Optionally, the dust removal unit is a cyclone dust removal tower.

[0015] Optionally, a filter screen is provided in the dust collection unit. After dust and gangue particles enter the dust collection unit, the gangue particles are filtered out by the filter screen, and the dust falls to the bottom of the filter screen.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention provides a dust removal device for a hydraulic support in a fully-mechanized mining face. The dust removal device of the present invention can be applicable to different mining heights, and different from the existing hydraulic support closed dust control device that only transports dust to the goaf, the dust removal device of the present invention can collect and centrally process dust without causing secondary pollution. Specifically, the following beneficial effects are achieved:

[0018] (1) The overall height of the dust removal device of the present invention is controlled within the range of ≤200mm, and it can be flexibly arranged for different mining heights (including mining heights below 6.5m), overcoming the problem of poor adaptability of the existing support closed dust control device to mining heights, and improving the application range and adaptability of the device;

[0019] (2) Through the combined design of a slotted side suction port, a dust suction pipeline, a small high-negative-pressure power unit, and a dust removal unit, the present invention can directly and quickly suck away the dust generated during the lowering and moving of hydraulic supports, featuring high dust removal efficiency, waterless treatment, centralized dust treatment, etc. It realizes waterless treatment at the source of dispersed dust sources, effectively solving the problems that traditional spray dust suppression is greatly affected by the water volume and the nozzles are easily blocked.

[0020] (3) The device of the present invention can collect and centrally treat the dust, avoiding the secondary pollution caused by traditional spray dust suppression, realizing the effective treatment and resource utilization of dust, and improving the efficiency and environmental protection of dust treatment.

[0021] (4) The dust removal device of the present invention can be flexibly arranged in an array according to the specific linear dust source length, meeting the requirements of different working scenarios, improving the practicability and flexibility of the dust removal device, and being able to adapt to the complex and changeable fully-mechanized mining working environment.

[0022] (5) By effectively treating the dust hazard, the present invention reduces the risk of miners suffering from silicosis, improves the life safety and physical and mental health level of miners, and provides a strong guarantee for the safe and efficient production of coal mines.

[0023] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0025] Figure 1 It is a schematic structural diagram of a dust removal device for hydraulic supports in a fully-mechanized mining face;

[0026] Figure 2 It is a schematic installation diagram of the dust removal device.

[0027] Reference Signs:

[0028] 1 slotted side suction port, 2 power unit, 3 dust removal unit, 4 dust collection unit, 5 dust suction pipeline, 6 dust removal device, 7 hydraulic support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0030] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] Please refer to Figures 1 to 2 , which is a dust removal device for hydraulic supports in a fully mechanized mining face, arranged at the gap between two adjacent hydraulic supports 7. Side guards are provided on the hydraulic supports 7, and the dust removal device is arranged on each side guard and located on the opposite surfaces of the side guards of adjacent hydraulic supports 7, without occupying the pedestrian space. The dust removal device 6 of the present invention includes a plurality of slotted side suction ports 1 arranged in sequence. The dust outlet ends of each slotted side suction port 1 are connected through a dust suction pipeline 5. One end of the dust suction pipeline 5 far from the slotted side suction port 1 is sequentially connected with a dust removal unit 3 and a dust collection unit 4; the dust and gangue particles generated when the hydraulic support 7 descends and moves the support are shunted and sucked into the dust suction pipeline 5 and the dust removal unit 3 in sequence, and then enter the dust collection unit 4 to complete the entire dust removal process.

[0034] The slot-type side suction port 1 is aligned with the gap between adjacent hydraulic supports 7 and is arranged along the length direction of the hydraulic support 7. A plurality of slot-type side suction ports 1 cover the gap between adjacent hydraulic supports 7 for shunt suction, avoiding dust suction dead angles, so as to ensure that the dust and gangue particles generated during the lowering of the support and the shifting of the support can be completely sucked into the dust suction pipeline 5 by the slot-type side suction port 1, improving the dust suction effect.

[0035] A power unit 2 is also provided on the dust suction pipeline 5 to drive the dust and gangue particles to be sucked into the dust suction pipeline 5. The power unit 2 is a high-negative-pressure small power unit 2. In this embodiment, a shaftless high-speed fan is selected, and the power source uses 127V alternating current underground, which has the advantages of high rotation speed, high negative pressure, large air volume, and small volume. It is directly driven by an electric motor, with a fast response speed, suitable for scenarios that need to be frequently started and stopped; the electric drive efficiency is usually higher than that of hydraulic transmission, suitable for working conditions with high requirements for dust suction efficiency.

[0036] The dust collection unit 4 is arranged below the dust removal unit 3 to facilitate the entry of dust and gangue particles. A filter screen is provided in the dust collection unit 4. After the dust and gangue particles enter the dust collection unit 4, the gangue particles are filtered out by the filter screen, and the dust falls to the bottom of the filter screen; it is convenient for the subsequent separate collection and treatment of dust and gangue particles.

[0037] In this embodiment, the dust removal unit 3 is preferably a cyclone dust removal tower. While achieving high-efficiency dust removal, the special cyclone structure of the cyclone dust removal tower avoids the problem of easy blockage during the dust removal process.

[0038] Embodiment Two

[0039] Different from the above Embodiment One, the power source uses the emulsion liquid of the fully-mechanized coal mining face. The emulsion pump converts mechanical energy into hydraulic energy, and pressurizes the emulsion liquid to high pressure through the reciprocating motion of the plunger; the high-pressure emulsion liquid drives the hydraulic motor to rotate, converting hydraulic energy into mechanical energy; the hydraulic motor directly drives the impeller of the shaftless fan to generate high-speed airflow.

[0040] Using the emulsion liquid of the fully-mechanized coal mining face as the power source has strong environmental adaptability. Because the emulsion liquid is a water-based fluid and is not flammable, it is suitable for flammable and explosive environments such as coal mines; secondly, the emulsion liquid can also lubricate hydraulic components, reduce wear, and take away the system heat at the same time. The emulsion liquid pump station can also remotely adjust the pressure to adapt to the complex working conditions of the fully-mechanized coal mining face.

[0041] Embodiment Three

[0042] On the basis of the above Embodiment One or Embodiment Two, in this embodiment, it is defined that the dust suction pipeline 5 is arranged obliquely downward along the direction in which the dust and gangue particles enter. The dust and gangue particles can enter the subsequent dust removal unit 3 due to their own gravity, and can also avoid the accumulation of dust and gangue particles in the dust suction pipeline 5 to a certain extent.

[0043] Example 4

[0044] On the basis of the above-mentioned Example 1, 2 or 3, this embodiment further defines that a filter screen is provided in the dust collection unit 4. After the dust and gangue particles enter the dust collection unit 4, the gangue particles are filtered out by the filter screen, and the dust falls to the bottom of the filter screen, which is convenient for the classified collection and treatment of dust and gangue particles.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A dust removal device for hydraulic supports in a fully mechanized coal mining face, characterized in that: It is arranged at the gap between two adjacent hydraulic supports (7), and includes a number of sequentially arranged slit-type side suction ports (1). The dust outlet ends of each slit-type side suction port (1) are connected through a dust suction pipeline (5). One end of the dust suction pipeline (5) far away from the slit-type side suction port (1) is sequentially connected with a dust removal unit (3) and a dust collection unit (4). The dust and gangue particles generated when the hydraulic support (7) descends and moves the support sequentially enter the dust collection unit (4) through the slit-type side suction port (1), the dust suction pipeline (5), and the dust removal unit (3).

2. The dust removal device for hydraulic supports in fully-mechanized coal mining faces according to claim 1, wherein: A power unit (2) is arranged on the dust suction pipeline (5) to drive the dust and gangue particles to be sucked into the dust suction pipeline (5).

3. The dust removal device for hydraulic supports in fully-mechanized coal mining faces according to claim 2, characterized in that: The power unit (2) is a shaftless high-speed fan, and the power source adopts 127V alternating current underground or emulsion liquid in the fully-mechanized mining face.

4. The dust removal device for hydraulic supports in fully-mechanized coal mining faces according to claim 1, wherein: The slit-type side suction port (1) is aligned with the gap between the adjacent hydraulic supports (7).

5. The dust removal device for hydraulic supports in fully-mechanized coal mining faces according to claim 1, wherein: Side guard plates are arranged on the hydraulic support (7), and the dust removal device is arranged on each side guard plate and located on the opposite surfaces of the side guard plates of the adjacent hydraulic supports (7).

6. The dust removal device for hydraulic supports in fully mechanized coal mining face according to claim 1, wherein: It is arranged along the length direction of the hydraulic support (7), and a number of the slit-type side suction ports (1) cover the gap between the adjacent hydraulic supports (7).

7. The dust removal device for hydraulic supports in fully mechanized coal mining faces according to claim 1, characterized in that: The dust suction pipeline (5) is arranged obliquely downward along the direction in which the dust and gangue particles enter to facilitate the entry of the dust and gangue particles.

8. The dust removal device for hydraulic supports in fully mechanized coal mining face according to claim 1, characterized in that: The dust collection unit (4) is arranged below the dust removal unit (3) to facilitate the entry of dust or gangue particles.

9. The dust removal device for hydraulic supports in a fully mechanized coal mining face according to claim 1, characterized in that: The dust removal unit (3) is a cyclone dust removal tower.

10. The dust removal device for hydraulic supports in fully-mechanized coal mining faces according to claim 1, characterized in that: A filter screen is arranged in the dust collection unit (4). After the dust and gangue particles enter the dust collection unit (4), the gangue particles are filtered out by the filter screen, and the dust falls to the bottom of the filter screen.

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