CN113027452B - Multistage multidimensional atomization dust control method and device for large-mining-height fully-mechanized mining face - Google Patents
Multistage multidimensional atomization dust control method and device for large-mining-height fully-mechanized mining face Download PDFInfo
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- CN113027452B CN113027452B CN202110371491.0A CN202110371491A CN113027452B CN 113027452 B CN113027452 B CN 113027452B CN 202110371491 A CN202110371491 A CN 202110371491A CN 113027452 B CN113027452 B CN 113027452B
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- 239000000428 dust Substances 0.000 title claims abstract description 164
- 238000005065 mining Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000000889 atomisation Methods 0.000 title claims description 48
- 239000003245 coal Substances 0.000 claims abstract description 154
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 230000002265 prevention Effects 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 39
- 238000002347 injection Methods 0.000 claims description 33
- 239000007924 injection Substances 0.000 claims description 33
- 230000007246 mechanism Effects 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 8
- 238000007667 floating Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000003595 mist Substances 0.000 description 15
- 239000002817 coal dust Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 208000028571 Occupational disease Diseases 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
- E21C35/223—Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
Abstract
The application belongs to the technical field of coal mine dust prevention and control, and discloses a method and a device for preventing and controlling multi-level multidimensional atomized dust on a large-mining-height fully-mechanized coal face, wherein a roller is fixed on a rocker arm of a coal mining machine in the device for preventing and controlling multi-level multidimensional atomized dust on the large-mining-height fully-mechanized coal face, and the rocker arm of the coal mining machine is connected with a machine body of the coal mining machine; the coal cutter body is provided with an upper end face of the coal cutter body and an arc face of the coal cutter body, and wet hydrodynamic dust collectors are arranged on left and right end faces of the upper end face of the coal cutter body; and the rocker arm of the coal mining machine, the upper end surface of the coal mining machine body and the cambered surface of the coal mining machine body are all provided with composite nozzle sprayers. According to the application, the composite nozzle sprayer group and the wet hydrodynamic dust remover are arranged in the coal cutter area, so that the movement of the composite nozzle sprayer group to the front of a frame, a sidewalk and other manned working spaces is restrained; through being provided with compound nozzle atomizer, the fog drop entrapment cylinder cutting that forms produces the dirt, can effectively entrapment cutting the dust that produces and the floating dust that the cylinder rotated and raise, hinder its to the face space loss.
Description
Technical Field
The application belongs to the technical field of coal mine dust control, and particularly relates to a multi-stage multidimensional atomization dust control method and device for a large-mining-height fully-mechanized mining face.
Background
At present, china is a country with relatively rich coal, oil deficiency and less gas, and the energy structure pattern which takes coal as a body, takes electric power as a center and comprehensively develops oil gas and new energy is basically formed at the present stage. In recent years, with the increasing of the mining intensity of coal mines and the increasing progress of the mechanization, automation and intellectualization degree of the stoping process, the problems of natural disasters of mines and the like are also more prominent, and the problems of dust pollution in underground operation sites are particularly pointed out. Under the condition that no dustproof measure is adopted, the dust concentration of the fully mechanized mining face of the mine can reach 2500-3000 mg/m < 3 >, and high-concentration dust can not only cause occupational diseases, but also cause mine dust explosion accidents, thereby seriously affecting the safe and efficient mining of the mine.
Aiming at the damage of high-concentration dust on a fully-mechanized mining working face of a mine, main prevention measures adopted include coal seam water injection, ventilation and dust discharge, spray dust fall, wet dust catching, individual protection, physical chemistry dust suppression and the like, but the fully-mechanized mining face is an open production space, the cutting dust produced by a coal cutter and the action dust produced by a hydraulic support are easily diffused to the whole working space along with wind current, the dust prevention measures can only reduce the concentration of the fully-mechanized mining working face dust to a certain extent, and the problem of high-concentration dust pollution on the fully-mechanized mining face is still serious.
Through the above analysis, the problems and defects existing in the prior art are as follows: the existing dustproof measures can only reduce the dust concentration of fully-mechanized mining work flour to a certain extent, and the problem of high-concentration dust pollution of the fully-mechanized mining face is still serious.
Disclosure of Invention
Aiming at the problems existing in the prior art, the application provides a multi-stage multidimensional atomization dust control method and device for a fully mechanized mining face with a large mining height.
The application is realized in such a way that the multi-stage multi-dimensional atomized dust control device of the large-mining-height fully-mechanized mining face is provided with a coal mining machine rocker arm;
a roller is fixed on the rocker arm of the coal mining machine, and the rocker arm of the coal mining machine is connected with the coal mining machine body; the coal cutter body is provided with an upper end face of the coal cutter body and an arc face of the coal cutter body, and wet hydrodynamic dust collectors are arranged on left and right end faces of the upper end face of the coal cutter body;
and the rocker arm of the coal mining machine, the upper end surface of the coal mining machine body and the cambered surface of the coal mining machine body are all provided with composite nozzle sprayers.
Further, the three composite nozzle sprayers are respectively arranged at the front roller and the rear roller of the coal mining machine and are fixed by using powerful magnets.
Further, the layout of the composite nozzle sprayers at the front and rear rollers is as follows:
the coal cutter body is arranged at the upper part of the rocker root coal cutter body, is close to the coal wall side, and sprays towards the direction close to the coal wall roller side; the device is arranged at the front part of the coal cutter body and sprays towards the side far away from the coal wall roller; the device is arranged at the root of a rocker arm of the coal mining machine and sprays towards the lower side of the roller.
Further, the spray group in the wet type hydrodynamic dust remover is selected to contain an X-shaped guide core nozzle.
Further, a hydraulic support pillar is arranged on the outer side of the coal cutter body, a top beam is arranged on the upper side of the hydraulic support pillar and connected with a shield beam, and a front cantilever is arranged on the top beam.
Further, the hydraulic support front cantilever is provided with a coal machine position sensing mechanism, the hydraulic support struts are provided with negative pressure entrainment dust removing devices and atomization injection spraying devices, and the negative pressure entrainment dust removing devices and the atomization injection spraying devices are distributed adjacently.
Further, the negative pressure entrainment dust removing device adopts a layout in a high-low mode, and the injection angle formed by the negative pressure entrainment dust removing device and the coal wall is 40 degrees;
the atomization injection spraying device is internally provided with 3 small spraying devices, and the spraying angles formed by the small spraying devices and the coal wall are 40 degrees, 55 degrees and 60 degrees respectively.
Further, the top beam and the shield beam are both provided with a hydraulic support action sensing mechanism.
Further, dust catching nets are arranged between the hydraulic support posts, a rolling shaft is arranged on a top beam on the upper side of the hydraulic support, and the dust catching nets which cover the full section of the lower space of the hydraulic support are arranged on the rolling shaft;
the dust catching net is provided with a counterweight rod, a spray rod is arranged below the roller shutter shaft, a plurality of dust catching net nozzles are uniformly arranged on the spray rod, and the dust catching net nozzles form an upwind 45-degree angle with the wind flow direction.
The application further aims to provide a multi-stage multi-dimensional atomized dust control method for the large-mining-height fully-mechanized mining face, which comprises the following steps:
when the coal machine position sensing mechanism of the current cantilever detects that the coal machine is driven in, the coal machine position sensing mechanism instructs electromagnetic valves of all devices to automatically open a negative pressure entrainment dust removing device and an atomization injection spraying device of a plurality of hydraulic supports on the upwind side and the downwind side of the coal machine;
after the coal machine drives out of the area for a certain distance, the position sensing mechanism of the coal machine automatically instructs the electromagnetic valve to close the Wen Fuya entrainment dust removing device and the atomization injection spraying device;
the composite nozzle sprayer is characterized in that dust generated by cutting a coal body by utilizing an atomization fog drop cutting roller is captured by utilizing a composite nozzle sprayer on a rocker arm of the coal mining machine, the upper end face of the coal mining machine body and the cambered surface of the coal mining machine body, and meanwhile, a wet type hydrodynamic dust remover is arranged on the upper end face of the coal mining machine body.
By combining all the technical schemes, the application has the advantages and positive effects that: according to the application, the composite nozzle sprayer group and the wet hydrodynamic dust remover are arranged in the coal cutter area, so that the movement of the composite nozzle sprayer group to the front of the frame, the sidewalk and other manned working spaces is restrained. The fog drops formed by the rocker arm of the coal mining machine and the compound nozzle sprayer on the end face of the machine body trap the cutting dust produced by the roller, and can effectively trap dust produced by cutting collapse and floating dust raised by rotation of the roller, so that the dust and the floating dust are prevented from escaping to the working face space.
The application uses the water power dust remover to realize high-efficiency collection of the cutting dust, realizes secondary crushing of fog drops, thereby generating a wind-water fog curtain with high density and particle diameter, closing the dissipation space of the cutting dust, repeatedly condensing the fog drops and dust particles in the atomization closed space, collecting high-concentration dust clusters, and inhibiting the migration of the dust to the front of a frame, a sidewalk and other personnel working spaces. The negative pressure entrainment dust collector and the atomization injection spraying device are arranged on the hydraulic support to capture the cutting and frame moving dust production of the coal machine, so that the dust is prevented from escaping to other operation areas. The multi-stage multidimensional atomization dust control method for realizing the coal mining area on the fully-mechanized coal mining face with large mining height improves the dust falling efficiency to more than 95% in the cutting and frame moving process of the coal mining machine, greatly reduces the dust concentration of the fully-mechanized coal mining face of the coal mine, avoids coal dust explosion accidents and greatly improves the working environment of workers.
Meanwhile, the novel hydrodynamic dust remover disclosed by the application is corrosion-resistant, long in service life and not easy to damage, and can be used for filtering pressurized water in multiple stages, so that the problem of blockage of a dust falling nozzle is effectively solved, a high-density and particle-diameter wind and water mist curtain generated by the dust remover under the hydrodynamic action is used for sealing a dissipation space of cut dust, mist drops and dust particles are repeatedly condensed in an atomization sealing space, and high-concentration dust clusters are trapped. A local atomization space closed cutting dust source is constructed through a novel hydrodynamic wet dust collector and a composite nozzle sprayer of the coal mining machine, so that on one hand, primary coal dust generated by cutting coal bodies is fully wetted or captured, and on the other hand, cutting turbulence wind lateral deviation is blocked or the deviation speed is slowed down, and therefore the capability of lateral dissipation of the cutting coal dust is weakened. In summary, the closed type dustproof device is arranged at the crusher, and the air-water double-curtain closed space or the single-fog-field closed space is formed by utilizing different types of sprayers, so that dust is prevented from escaping to other working areas or high-concentration dust is prevented from being blocked outside the closed space.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a multi-stage multidimensional atomization dust control device for a large mining height fully-mechanized mining face, which is provided by the embodiment of the application.
Fig. 2 is a schematic structural diagram of a negative pressure entrainment dust removing device, an atomization injection spraying device and a top beam provided by the embodiment of the application.
Fig. 3 is a schematic view of a dust catching net installation structure provided by an embodiment of the application.
In the figure: 1. a rocker arm of the coal mining machine; 2. the upper end face of the coal mining machine body; 3. arc surface of coal cutter body; 4. a compound nozzle sprayer; 5. a roller; 6. wet hydrodynamic dust remover; 7. a front cantilever; 8. a coal machine position sensing mechanism; 9. a hydraulic support post; 10. negative pressure entrainment dust collector; 11. an atomization injection spraying device; 12. a top beam; 13. a shield beam; 14. the hydraulic support action induction mechanism; 15. a roller shutter shaft; 16. a dust catching net; 17. a weight bar; 18. dust catching net nozzle.
Detailed Description
The present application will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Aiming at the problems existing in the prior art, the application provides a multi-stage multidimensional atomization dust control method and device for a large mining height fully mechanized mining face, and the application is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a roller 5 is fixed on a rocker arm 1 of a coal mining machine, the rocker arm 1 of the coal mining machine is connected with a body of the coal mining machine, the body of the coal mining machine is provided with an upper end face 2 of the body of the coal mining machine and an arc face 3 of the body of the coal mining machine, and the left end face and the right end face of the upper end face 2 of the body of the coal mining machine are provided with wet-type hydrodynamic dust collectors 6. Wherein, the rocker arm 1 of the coal mining machine, the upper end face 2 of the coal mining machine body and the cambered surface 3 of the coal mining machine body are all provided with a composite nozzle sprayer 4.
And three composite nozzle sprayers 4 are respectively arranged at the front roller 5 and the rear roller 5 of the coal mining machine and are fixed by using powerful magnets. The arrangement of the compound nozzle sprayers 4 at the front and rear drums 5 is as follows: the coal cutter is arranged at the upper part of the coal cutter body at the root of the rocker arm 1 of the coal cutter, is close to the side of the coal wall, and is used for spraying in the direction close to the side of the roller of the coal wall so as to reduce dust generated by coal body collapse; the cutting dust collector is arranged at the front part of the coal cutter body, sprays towards the side far away from the coal wall roller and is used for preventing cutting dust from escaping due to turbulent cutting wind of the roller; the dust-removing device is arranged at the root of the rocker arm 1 of the coal cutter and is sprayed to the lower side of the roller, so that dust raised by the roller of the coal cutter can be effectively inhibited and prevented from diffusing to a sidewalk. The left side and the right side of the coal mining machine are arranged in the same way, namely, each side is provided with 3 composite nozzle sprayers 4 and 1 wet hydrodynamic dust remover 6, and the two sprayers are used for forming fog drops to further capture a small amount of dust particles escaping from the closed space, so that the secondary crushing of the fog drops is realized, and a wind water mist curtain with high density and particle diameter is generated.
The high-density wind water mist curtain with particle diameter generated by the wet hydrodynamic dust remover 6 under the action of hydrodynamic force seals the dissipation space of the cutting dust, and the mist drops and the dust particles are repeatedly condensed in the atomization sealing space to collect the high-concentration dust clusters. The spray nozzle containing the X-shaped guide core is selected from the spray group in the novel wet type hydrodynamic dust remover 6, so that high-density mist flow can be formed to catch the sealed coal dust under the assistance of positive pressure operation of the wet type hydrodynamic dust remover. The field measurement result shows that under the test condition of water pressure of 3MPa, the mist-jet distance of the novel wet hydrodynamic dust remover is about 7m, the dust catching cross-sectional area is about 15-20 m < 2 >, and the dust settling efficiency is about 90%. The wet hydrodynamic dust remover is made of 304 stainless steel, is corrosion-resistant, long in service life, and capable of filtering pressurized water in multiple stages, effectively relieving the problem of blockage of dust settling nozzles, and is suitable for complex operation scenes of fully mechanized mining working faces and other operation places where driving sources such as electric driving sources and pneumatic driving sources are difficult to use.
As shown in fig. 2, the outside of the coal mining machine body of the application is provided with a hydraulic support pillar 9, the upper side of the hydraulic support pillar 9 is provided with a top beam 12, the top beam 12 is connected with a shield beam 13, and the top beam 12 is provided with a front canopy 7; the hydraulic support front cantilever 7 is provided with a coal machine position sensing mechanism 8, each two adjacent hydraulic support struts 9 are provided with a negative pressure entrainment dust removing device 10 and an atomization injection spraying device 11, the negative pressure entrainment dust removing device 10 and the atomization injection spraying device 11 are distributed adjacently, namely, each three support dust collectors form a cycle, and the hydraulic support front cantilever comprises two negative pressure entrainment dust collectors and a full-section atomization injection spraying dust removing device.
The negative pressure entrainment dust collector 10 forms an injection angle of 40 ° with the coal wall. The atomizing injection spraying device 11 is internally provided with 3 small spraying devices, the spraying angles formed by the atomizing injection spraying device and the coal wall are 40 degrees, 55 degrees and 60 degrees respectively, and each hydraulic support top beam 12 and each shield beam 13 are provided with a hydraulic support action sensing mechanism 14. The hydraulic support struts 9 for installing the negative pressure entrainment dust collector are provided with 4 negative pressure entrainment dust collectors 10, two by two are installed on the hydraulic support struts, and the hydraulic support struts 9 for installing the atomization injection spraying device are provided with a group of atomization injection spraying devices 11.
The negative pressure entrainment dust collector 10 is arranged in a height-to-height manner, and is directed to the coal wall from the goaf and offset by 40 degrees. The negative pressure entrainment dust collector 10 is arranged at the upright post of the hydraulic support and forms a certain included angle with the coal wall and is arranged on the hydraulic support. When the coal machine position sensing mechanism 8 of the current cantilever 7 detects a coal cutter with an entering coal cutter, the coal machine position sensing mechanism 8 instructs electromagnetic valves of all devices to automatically open a negative pressure entrainment dust removing device 10 and an atomization injection spraying device 11 of a plurality of hydraulic supports on the upwind side and the downwind side of the coal cutter, the aim of reducing dust production to the greatest extent is achieved, the negative pressure entrainment dust removing device 10 and the atomization injection spraying device 11 can efficiently capture and cut the dust production, and after the coal cutter leaves the area for a certain distance, the coal machine position sensing mechanism 8 automatically instructs the electromagnetic valves to close the Wen Fuya entrainment dust removing device 10 and the atomization injection spraying device 11.
The water mist curtain is formed between the coal cutter and the upright post through the atomization injection spraying device 11 and the negative pressure entrainment dust removing device 10, cutting coal dust escaping from a mist flow sealing area at the roller is further blocked, meanwhile, the coal dust is moved to a part which is remained in the sidewalk, and the negative pressure flow field formed by the atomization injection spraying device 11 and the negative pressure entrainment dust removing device 10 near the breathing zone can effectively entrain the coal dust and bring the coal dust away from the sidewalk through the sprayed mist flow, so that the aim of secondary dust fall is fulfilled. On the other hand, the optimized hydraulic support is sprayed on the coal mining machine channel to form a water mist section, and a space multidimensional atomization closed space is formed between the water mist section, the full-section atomization injection spraying device 11 and the negative pressure entrainment dust removing device 10, and the water mist curtain and the coal wall, so that coal dust and water mist sealed in the space repeatedly act, and finally the aim of high-efficiency spraying and dust falling is achieved.
As shown in fig. 3, at the return air gate, dust collecting net 16 is arranged between hydraulic support posts 9 to inhibit dust diffusion, a roller shutter shaft 15 is arranged on a top beam 12 on the upper side of the hydraulic support, the dust collecting net 16 covering the full section of the space on the lower part of the hydraulic support is arranged on the roller shutter shaft 15, a counterweight rod 17 is arranged on the dust collecting net 16, a spray rod is arranged below the roller shutter shaft 15, a plurality of dust collecting net nozzles 18 are uniformly arranged on the spray rod, and the dust collecting net nozzles 18 form an upwind 45-degree angle with the wind flow direction, so that the dust collecting net can effectively reduce dust and improve the working environment.
At the outlet of the crusher, a dust separation net is arranged to partially seal coal dust, and sprayers are arranged at two sides of the crusher, so that flying coal dust is avoided, and unsafe hidden danger in production is eliminated.
The working principle of the application is as follows: when the coal machine position sensing mechanism 8 of the current cantilever 7 detects a coal cutter with an entering coal cutter, the coal machine position sensing mechanism 8 instructs electromagnetic valves of all devices to automatically open a negative pressure entrainment dust removing device 10 and an atomization injection spraying device 11 of a plurality of hydraulic supports on the upwind side and the downwind side of the coal cutter, the aim of reducing dust production to the greatest extent is achieved, the negative pressure entrainment dust removing device 10 and the atomization injection spraying device 11 can efficiently capture and cut the dust production, and after the coal cutter leaves the area for a certain distance, the coal machine position sensing mechanism 8 automatically instructs the electromagnetic valves to close the Wen Fuya entrainment dust removing device 10 and the atomization injection spraying device 11.
The coal cutter rocker arm 1, the upper end face 2 of the coal cutter body and the composite nozzle sprayer 4 of the cambered surface 3 of the coal cutter body are used for capturing dust generated by cutting the coal body by utilizing atomized fog drops, and meanwhile, the upper end face 2 of the coal cutter body is provided with a wet type hydrodynamic dust remover 6.
The application is suitable for complex operation scenes of fully mechanized mining face and other operation places which are difficult to use driving sources such as electric driving sources, pneumatic driving sources and the like. The high-density wind water mist curtain with particle diameter generated by the dust remover under the action of hydrodynamic force seals the dissipation space of the cutting dust, and the mist drops and the dust particles are repeatedly condensed in the atomization sealing space to collect high-concentration dust clusters.
In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the application is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present application will be apparent to those skilled in the art within the scope of the present application.
Claims (8)
1. The utility model provides a high comprehensive mechanized coal mining face multistage multidimensional atomizing dust prevention and cure device of big adopts, its characterized in that, high comprehensive coal mining face multistage multidimensional atomizing dust prevention and cure device is provided with:
a rocker arm of the coal mining machine;
a roller is fixed on the rocker arm of the coal mining machine, and the rocker arm of the coal mining machine is connected with the coal mining machine body; the coal cutter body is provided with an upper end face of the coal cutter body and an arc face of the coal cutter body, and wet hydrodynamic dust collectors are arranged on left and right end faces of the upper end face of the coal cutter body;
the rocker arm of the coal mining machine, the upper end surface of the coal mining machine body and the cambered surface of the coal mining machine body are provided with composite nozzle sprayers;
the compound nozzle sprayers are respectively arranged at the front roller and the rear roller of the coal mining machine and are fixed by using strong magnets;
the layout of the composite nozzle sprayers at the front roller and the rear roller is as follows: the coal cutter body is arranged at the upper part of the rocker root coal cutter body, is close to the coal wall side, and sprays towards the direction close to the coal wall roller side; the device is arranged at the front part of the coal cutter body and sprays towards the side far away from the coal wall roller; the device is arranged at the root of a rocker arm of the coal mining machine and sprays towards the lower side of the roller.
2. The multi-stage multidimensional atomization dust control device for the large mining height fully-mechanized mining face according to claim 1, wherein the spray group in the wet type hydrodynamic dust remover is selected from the spray nozzles containing 'X' -shaped guide cores.
3. The multi-stage multidimensional atomization dust control device for the large mining height fully-mechanized mining face according to claim 1, wherein a hydraulic support pillar is arranged on the outer side of the coal mining machine body, a top beam is arranged on the upper side of the hydraulic support pillar and connected with a shield beam, and a front canopy is arranged on the top beam.
4. The multi-stage multidimensional atomization dust prevention device for the large mining height fully-mechanized mining face according to claim 3, wherein the hydraulic support front cantilever is provided with a coal machine position sensing mechanism, the hydraulic support struts are provided with a negative pressure entrainment dust removing device and an atomization injection spraying device, and the negative pressure entrainment dust removing device and the atomization injection spraying device are adjacently distributed.
5. The multi-level multidimensional atomization dust control device for the large mining height fully-mechanized mining face according to claim 4, wherein the negative pressure entrainment dust removing device adopts a high-low mode layout, and the injection angle formed by the negative pressure entrainment dust removing device and the coal wall is 40 degrees;
the atomization injection spraying device is internally provided with 3 small spraying devices, and the spraying angles formed by the small spraying devices and the coal wall are 40 degrees, 55 degrees and 60 degrees respectively.
6. The multi-stage multidimensional atomization dust control device for the large mining height fully-mechanized mining face according to claim 3, wherein the top beam and the shield beam are both provided with a hydraulic support action sensing mechanism.
7. The multi-stage multidimensional atomization dust control device for the large mining height fully-mechanized mining face according to claim 3, wherein dust catching nets are arranged among the hydraulic support posts, a roller shutter shaft is arranged on a top beam on the upper side of the hydraulic support, and the roller shutter shaft is provided with the dust catching nets which cover the full section of the lower space of the hydraulic support;
the dust catching net is provided with a counterweight rod, a spray rod is arranged below the roller shutter shaft, a plurality of dust catching net nozzles are uniformly arranged on the spray rod, and the dust catching net nozzles form an upwind 45-degree angle with the wind flow direction.
8. A large-mining-height fully-mechanized mining face multistage multidimensional atomized dust control method of the large-mining-height fully-mechanized mining face multistage multidimensional atomized dust control device according to any one of claims 1 to 7, characterized by comprising:
when the coal machine position sensing mechanism of the current cantilever detects that the coal machine is driven in, the coal machine position sensing mechanism instructs electromagnetic valves of all devices to automatically open a negative pressure entrainment dust removing device and an atomization injection spraying device of a plurality of hydraulic supports on the upwind side and the downwind side of the coal machine;
after the coal machine drives out of the area for a certain distance, the position sensing mechanism of the coal machine automatically instructs the electromagnetic valve to close the Wen Fuya entrainment dust removing device and the atomization injection spraying device;
the composite nozzle sprayer is characterized in that dust generated by cutting a coal body by utilizing an atomization fog drop cutting roller is captured by utilizing a composite nozzle sprayer on a rocker arm of the coal mining machine, the upper end face of the coal mining machine body and the cambered surface of the coal mining machine body, and meanwhile, a wet type hydrodynamic dust remover is arranged on the upper end face of the coal mining machine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110371491.0A CN113027452B (en) | 2021-04-07 | 2021-04-07 | Multistage multidimensional atomization dust control method and device for large-mining-height fully-mechanized mining face |
Applications Claiming Priority (1)
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| CN201747397U (en) * | 2010-08-12 | 2011-02-16 | 山东科技大学 | Novel spray dust reducing device |
| CN105626134A (en) * | 2016-03-04 | 2016-06-01 | 山东科技大学 | Local area closed dust prevention and control method for fully mechanized coal mining working faces |
| CN109026126A (en) * | 2018-09-21 | 2018-12-18 | 中煤科工集团重庆研究院有限公司 | A kind of coal mining machine in full-mechanized mining face contrary wind coal cutting dust comprehensive processing method |
| CN109630187A (en) * | 2019-01-07 | 2019-04-16 | 山东科技大学 | A kind of working face dust prevention and control method based on working face scene coal dust Diffusion Law |
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| ZA201603986B (en) * | 2015-06-15 | 2017-07-26 | Joy Mm Delaware Inc | Spray system for mining machine |
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| CN201747397U (en) * | 2010-08-12 | 2011-02-16 | 山东科技大学 | Novel spray dust reducing device |
| CN105626134A (en) * | 2016-03-04 | 2016-06-01 | 山东科技大学 | Local area closed dust prevention and control method for fully mechanized coal mining working faces |
| CN109026126A (en) * | 2018-09-21 | 2018-12-18 | 中煤科工集团重庆研究院有限公司 | A kind of coal mining machine in full-mechanized mining face contrary wind coal cutting dust comprehensive processing method |
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