Coal mine stope face rotating telescopic TADA atomization spraying dust falling device

Abstract

The invention discloses a coal mine stoping working face rotary telescopic TADA atomization spraying dust fall device, and relates to the technical field of coal mine underground dust prevention, the coal mine stoping working face rotary telescopic TADA atomization spraying dust fall device comprises two atomization sprayers and a coal mining machine, the coal mining machine comprises a coal mining machine body, and rocker arms are symmetrically arranged on the two sides of the coal mining machine body; the bottoms of the two atomization ejectors are rotationally connected with a support, a base is arranged below the support, a through hole is formed in the middle of the base, a rotating mechanism is arranged in the through hole and fixedly connected with the support, and a pitching mechanism is arranged between the support and the atomization ejectors. According to the coal mine stoping working face rotary telescopic TADA atomization spraying dust fall device adopting the structure, the jet orifice sprays high-speed jet spray through the rotary impeller mechanism, and the multiple nozzles arranged on the inner circle and the outer circle spray high-speed water flow, so that dust fall is effectively carried out; and the direction of the atomizing ejector is adjusted through the rotating mechanism and the pitching mechanism, all-directional dust falling is carried out, and the dust falling effect is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of dust control technology in underground coal mines, and in particular to a rotary and retractable TADA atomizing jet dust suppression device for coal mine longwall face. Background Technology

[0002] Coal dust is one of the five major hazards in coal mines and a major cause of pneumoconiosis in miners. The mortality rate from pneumoconiosis in the coal industry is as high as 22.04%, far exceeding the number of deaths from coal mine accidents. With the national requirements for intelligent and green coal mining, it is imperative to eliminate outdated technologies, equipment, and processes that cause occupational diseases, vigorously promote clean production technologies, develop key technologies and equipment for occupational disease prevention and control, reduce dust concentrations in the working environment, and strengthen supervision and inspection of personal protective equipment for underground workers.

[0003] At present, although the dust control methods for underground coal mining faces at home and abroad have achieved certain dust reduction effects, these methods have certain technical or usage defects and are not accepted by on-site workers. The common method for dust reduction in coal mining faces is to use the internal and external spray devices of the coal mining machine, but there are common problems such as easy clogging or damage of nozzles and improper installation position of sprayers. The dust reduction effect is not good and it is difficult to meet the requirements of the regulations. In some cases, the difference is far. After a new coal mining machine has been used for about half a year, the internal spray device can no longer be used. Other methods include coal seam water injection. Coal seam water injection is a method of pre-wetting the coal body by drilling deep holes with a drilling rig before coal mining. It consumes a lot of water and increases the moisture content of the coal. When the moisture content reaches more than 4%, it leads to a decrease in coal price and reduces the economic benefits of coal enterprises. In addition, the cost of deep hole water injection in coal seams is high, drilling is difficult, and the applicable conditions are limited. The following coal seams are not applicable: (1) The surrounding rock has serious water absorption and expansion properties, and water injection is likely to cause roof collapse or floor deformation, or the geological conditions are complex and the roof is difficult to penetrate. (1) Coal seams that are severely damaged and whose safety is affected by water injection; (2) Thin coal seams that will affect the safety of coal mining or cause a deterioration of working conditions after water injection; (3) Coal seams with natural moisture content or moisture content greater than 4% after fire prevention and extinguishing grouting; (4) Coal seams with porosity less than 4%; (5) Coal seams that are very soft and broken, and are prone to collapse and difficult to form holes when drilling; (6) The next layer or the next layer below the goaf of the upper layer or the upper layer when the downward caving method is used to mine close-range coal seam groups or to mine thick coal seams in layers.

[0004] Given the severe situation and urgent needs, and based on the principles of "people-oriented, caring for life, addressing the root causes, and preventing pneumoconiosis," we have invented a rotary and retractable TADA atomizing jet dust suppression device for coal mine longwall faces. This device is of great practical significance in solving the problem of dust pollution at longwall faces. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary and retractable TADA atomizing jet dust suppression device for coal mine longwall faces, solving the problem of poor dust suppression effect of existing dust suppression devices.

[0006] To achieve the above objectives, the present invention provides a rotary telescopic TADA atomizing jet dust suppression device for coal mine longwall face, comprising two atomizing jets and a coal mining machine. The coal mining machine includes a coal mining machine body, with rocker arms symmetrically arranged on both sides of the coal mining machine body. A roller is connected to the top of the rocker arm, and a plurality of internal spray nozzles are arranged around the outer periphery of the roller.

[0007] The bottom of the two atomizing nozzles is rotatably connected to a bracket, and a base is provided below the bracket. A through hole is provided in the middle of the base, and a rotation mechanism is provided in the through hole. The rotation mechanism is fixedly connected to the bracket, and a pitching mechanism is provided between the bracket and the atomizing nozzle.

[0008] Preferably, the front end of the atomizing injector is provided with a spray head, and two telescopic rods are symmetrically arranged between the spray head and the atomizing injector, and the two telescopic rods are respectively connected to two drive motors.

[0009] Preferably, a spray nozzle is provided at the middle position of the spray head, and an inner ring air supply pipe, an inner ring water supply pipe, an outer ring air supply pipe, and an outer ring water supply pipe are arranged around the outer periphery of the spray nozzle from the inside to the outside. The inner ring air supply pipe, the inner ring water supply pipe, the outer ring air supply pipe, and the outer ring water supply pipe are all configured as annular structures.

[0010] Preferably, the inner ring air supply pipe is provided with a plurality of inner ring nozzles, and the side ends of the plurality of inner ring nozzles are all connected to the inner ring water supply pipe. The outer ring air supply pipe is provided with a plurality of first outer ring nozzles and second outer ring nozzles, and the side ends of the plurality of second outer ring nozzles and the first outer ring nozzles are all connected to the outer ring water supply pipe.

[0011] Preferably, the plurality of inner ring nozzles are all arranged inward, the plurality of first outer ring nozzles are all arranged inward, the plurality of second outer ring nozzles are all arranged inward, and the plurality of second outer ring nozzles and the plurality of first outer ring nozzles are alternately arranged.

[0012] Preferably, the inner ring nozzle, the first outer ring nozzle, and the second outer ring nozzle all include a nozzle housing. One end of the nozzle housing is provided with an air inlet, the other end of the nozzle housing is provided with a nozzle outlet, the top of the nozzle housing is provided with a water inlet, the inside of the nozzle housing is provided with a guide pipe, and the outside of the guide pipe is provided with a resonant cavity.

[0013] Preferably, the atomizing injector is provided with a counter-rotating impeller mechanism located below the injection head. The counter-rotating impeller mechanism includes a primary motor, a primary impeller connected to the primary motor, and a secondary impeller on one side of the primary impeller, which is connected to the secondary motor.

[0014] Preferably, the rotary mechanism includes a rotary bearing disposed in the through hole, a turntable disposed in the middle of the rotary bearing, the upper part of the turntable being fixedly connected to the connecting bracket, a second drive motor disposed below the turntable, and the output shaft of the second drive motor being fixedly connected to the turntable.

[0015] Preferably, the pitch mechanism includes an electric push rod, one end of which is fixed at the middle position of the connecting bracket, and the other end of which is fixed to the atomizing injector.

[0016] Preferably, both drive motors are fixedly mounted on the atomizing injector, and the second drive motor is mounted inside the coal mining machine body.

[0017] Therefore, the present invention provides a rotary telescopic TADA atomizing jet dust suppression device for coal mine longwall face with the above-mentioned structure. The device uses a rotary impeller mechanism to spray high-speed jet spray from the nozzle and multiple nozzles arranged in the inner and outer rings to spray high-speed water flow for effective dust suppression. The atomizing jet can be adjusted in position by the rotation mechanism and the pitch mechanism to achieve all-round dust suppression, which greatly improves the dust suppression effect.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of the TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to the present invention.

[0020] Figure 2 This is a front view of an embodiment of the TADA atomizing jet dust suppression device for a coal mine longwall face according to the present invention.

[0021] Figure 3 This is a side view of the atomizing jet of a rotary retractable TADA atomizing jet dust suppression device for coal mine longwall face according to the present invention;

[0022] Figure 4 This is a front view of the atomizer of a TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to the present invention.

[0023] Figure 5This is a schematic diagram of the counter-rotating impeller mechanism of a TADA atomizing jet dust suppression device for a coal mine longwall face according to the present invention.

[0024] Figure 6 This is a schematic diagram of the inner ring nozzle of a rotary retractable TADA atomizing jet dust suppression device for coal mine longwall face according to the present invention.

[0025] Reference numerals in the attached drawings: 1. Atomizing injector; 2. Coal mining machine body; 3. Rocker arm; 4. Drum; 5. Inner spray nozzle; 6. Support; 7. Base; 8. Rotation mechanism; 9. Pitch mechanism; 10. Spray head; 11. Telescopic rod; 12. Drive motor one; 13. Spray port; 14. Inner ring air supply pipe; 15. Inner ring water supply pipe; 16. Outer ring air supply pipe; 17. Outer ring water supply pipe; 18. Inner ring nozzle; 19. First outer ring nozzle; 20. Second outer ring nozzle; 21. Nozzle housing; 22. Air inlet; 23. Nozzle outlet; 24. Water inlet; 25. Guide pipe; 26. Resonance cavity; 27. Primary motor; 28. Primary impeller; 29. ​​Secondary impeller; 30. Secondary motor; 31. Rotary bearing; 32. Turntable; 33. Drive motor two; 34. Electric push rod. Detailed Implementation

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] Example

[0029] Please see Figure 1-6 The present invention provides a rotary telescopic TADA atomizing jet dust suppression device for coal mining working face, including two atomizing jets 1 and a coal mining machine. The coal mining machine includes a coal mining machine body 2, with rocker arms 3 symmetrically arranged on both sides of the coal mining machine body 2. The top of the rocker arms 3 is connected to a roller 4, and a plurality of internal spray nozzles 5 are arranged around the outer periphery of the roller 4.

[0030] The bottom of the two atomizing nozzles 1 is rotatably connected to a bracket 6. A base 7 is provided below the bracket 6. A through hole is provided in the middle of the base 7. A rotation mechanism 8 is provided in the through hole. The rotation mechanism 8 is fixedly connected to the bracket 6. A pitching mechanism 9 is provided between the bracket 6 and the atomizing nozzle 1.

[0031] The atomizing injector 1 has a nozzle 10 at its front end. Two telescopic rods 11 are symmetrically arranged between the nozzle 10 and the atomizing injector 1. The two telescopic rods 11 are connected to two drive motors 12, which are fixedly mounted on the atomizing injector 1. When the two drive motors 12 are started, they drive the two telescopic rods 11 to extend or retract, thereby advancing the nozzle 10 forward and backward.

[0032] A nozzle 13 is located at the center of the nozzle 10. Around the nozzle 13, from the inside out, are arranged an inner ring air supply pipe 14, an inner ring water supply pipe 15, an outer ring air supply pipe 16, and an outer ring water supply pipe 17. All four pipes are annular. The inner ring air supply pipe 14 and the outer ring air supply pipe 16 are connected, and the inner ring water supply pipe 15 and the outer ring water supply pipe 17 are connected.

[0033] The inner ring air supply pipe 14 is provided with multiple inner ring nozzles 18, and the side ends of the multiple inner ring nozzles 18 are all connected to the inner ring water supply pipe 15. The outer ring air supply pipe 16 is provided with multiple first outer ring nozzles 19 and second outer ring nozzles 20, and the side ends of the multiple second outer ring nozzles 20 and the first outer ring nozzles 19 are all connected to the outer ring water supply pipe 17.

[0034] Multiple inner ring nozzles 18 are all arranged inwards, multiple first outer ring nozzles 19 are all arranged inwards, and multiple second outer ring nozzles 20 are all arranged inwards, with the multiple second outer ring nozzles 20 and the multiple first outer ring nozzles 19 arranged alternately. The nozzles have excellent atomization effect, with atomized particle size of 3-10μm, self-cleaning function, are made of brass, are corrosion resistant, and have a long service life.

[0035] The inner ring nozzle 18, the first outer ring nozzle 19, and the second outer ring nozzle 20 have the same structure, such as... Figure 6As shown, each nozzle includes a nozzle housing 21. One end of the nozzle housing 21 has an air inlet 22, and the other end has a nozzle outlet 23. A water inlet 24 is located at the top of the nozzle housing. A guide pipe 25 is installed inside the nozzle housing, forming a resonant cavity 26 between the guide pipe 25 and the nozzle housing 21. Compressed air flows in through the air supply pipe via the air inlet 22, then passes through the guide pipe 25 and is ejected at high speed from the nozzle outlet 23. Simultaneously, it enters the resonant cavity 26, generating high-frequency resonance that reaches ultrasonic frequencies (higher than 20,000 Hz), thus producing ultrasonic waves. Water flows in through the water inlet 22 and is ejected from the nozzle outlet 23. The ejected water droplets are broken up under the action of the ultrasonic waves, producing a large amount of fine spray. The structure consisting of the air inlet 20, the guide tube 25, and the resonant cavity 26 is the Hartmann whistle. In terms of atomization effect, this nozzle atomizes particles with a particle size of 3-10μm, which can effectively adsorb suspended dust, especially inhalable dust particles with a diameter of less than 10μm.

[0036] The adsorption of inhalable dust particles is a key problem that traditional dust removal equipment cannot solve. The probability of dust adsorption and condensation is greatest when water mist particles are similar in size to dust particles. Through continuous condensation, the weight of dust particles increases, and they settle under the action of gravity, thereby achieving the effect of dust reduction.

[0037] This nozzle cleans the nozzle cavity while vibrating, thus having a self-cleaning function and extending maintenance and replacement intervals. In terms of service life, this nozzle has no moving parts, is made of brass, is corrosion-resistant, and has a long service life.

[0038] The atomizing jet 1 has a counter-rotating impeller mechanism located below the spray head 10. This mechanism includes a primary motor 27, a primary impeller 28 connected to the primary motor 27, and a secondary impeller 29 connected to one side of the primary impeller 28. The secondary impeller 29 is connected to a secondary motor 30. Airflow enters the tail of the atomizing jet 1. After passing through the primary impeller 28, the airflow generates a circumferential swirling velocity component. This swirling velocity component is eliminated by the counter-rotating secondary impeller 29, causing the airflow at the outlet of the secondary impeller 29 to flow axially. This high-speed axial airflow transforms the low-speed spray at the spray nozzle 13 into a high-speed jet spray. Figure 3 As shown, the first-stage impeller 28 and the second-stage impeller 29 are driven independently by the first-stage motor 27 and the second-stage motor 30, respectively. The first-stage impeller 28 and the second-stage impeller 29 are installed opposite each other, with the same rotation speed and opposite rotation directions.

[0039] The rotary mechanism includes a rotary bearing 31 housed within a through hole, a turntable 32 positioned in the center of the rotary bearing 31, a fixed connection between the upper part of the turntable 32 and the support 6, and a second drive motor 33 positioned below the turntable 32. The output shaft of the second drive motor 33 is fixedly connected to the turntable 32, and the second drive motor 33 is housed within the coal mining machine body. When the second drive motor 33 starts, its output shaft drives the turntable 32 to rotate, which in turn drives the fixedly connected support 6 to rotate, thereby achieving the rotation of the atomizing injector 1.

[0040] The pitch mechanism includes an electric push rod 34, one end of which is fixed at the middle position of the bracket 6, and the other end of which is fixed to the atomizing nozzle 1. When the electric push rod 34 is activated, the end fixed to the bracket 6 remains stationary, and the telescopic rod of the electric push rod 34 is connected to the atomizing nozzle 1. As the telescopic rod extends and retracts, the atomizing nozzle 1 rotates around the bracket 6, thus achieving the pitch function.

[0041] In practical use, the tail of the atomizing jet 1 is filled with airflow, which is formed by the impeller mechanism to create a high-speed axial airflow. This causes the low-speed spray from the nozzle 13 to become a high-speed jet spray. The inner ring nozzle 18, the first outer ring nozzle 19, and the second outer ring nozzle 20 inside the nozzle 13 are arranged in two rings, which can spray high-speed water flow to effectively reduce dust. The atomizing jet 1 is oriented by the rotation mechanism 8 and the pitch mechanism 9, thereby realizing coal dust tracking spray.

[0042] Therefore, the present invention provides a rotary telescopic TADA atomizing jet dust suppression device for coal mine longwall face with the above-mentioned structure. The device uses a rotary impeller mechanism to spray high-speed jet spray from the nozzle and multiple nozzles arranged in the inner and outer rings to spray high-speed water flow for effective dust suppression. The atomizing jet can be adjusted in position by the rotation mechanism and the pitch mechanism to achieve all-round dust suppression, which greatly improves the dust suppression effect.

[0043] 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A rotary and retractable TADA atomizing jet dust suppression device for coal mine longwall faces, characterized in that: It includes two atomizing injectors and a coal mining machine. The coal mining machine includes a coal mining machine body, with rocker arms symmetrically arranged on both sides of the coal mining machine body. A roller is connected to the top of the rocker arm, and several internal spray nozzles are arranged around the outer periphery of the roller. The bottom of the two atomizing nozzles is rotatably connected to a bracket, and a base is provided below the bracket. A through hole is provided in the middle of the base, and a rotation mechanism is provided in the through hole. The rotation mechanism is fixedly connected to the bracket, and a pitching mechanism is provided between the bracket and the atomizing nozzle.

2. The TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to claim 1, characterized in that: The atomizing injector is provided with a spray head at its front end, and two telescopic rods are symmetrically arranged between the spray head and the atomizing injector. The two telescopic rods are respectively connected to two drive motors.

3. The TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to claim 2, characterized in that: A spray nozzle is provided at the middle position of the spray head. From the inside to the outside, an inner ring air supply pipe, an inner ring water supply pipe, an outer ring air supply pipe, and an outer ring water supply pipe are arranged around the spray nozzle. The inner ring air supply pipe, the inner ring water supply pipe, the outer ring air supply pipe, and the outer ring water supply pipe are all arranged in a ring structure.

4. The TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to claim 3, characterized in that: The inner ring air supply pipe is provided with multiple inner ring nozzles, and the side ends of the multiple inner ring nozzles are all connected to the inner ring water supply pipe. The outer ring air supply pipe is provided with multiple first outer ring nozzles and second outer ring nozzles, and the side ends of the multiple second outer ring nozzles and the first outer ring nozzles are all connected to the outer ring water supply pipe.

5. The TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to claim 4, characterized in that: The multiple inner ring nozzles are all arranged inward, the multiple first outer ring nozzles are all arranged inward, the multiple second outer ring nozzles are all arranged inward, and the multiple second outer ring nozzles and the multiple first outer ring nozzles are alternately arranged.

6. The TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to claim 5, characterized in that: The inner ring nozzle, the first outer ring nozzle, and the second outer ring nozzle all include a nozzle housing. One end of the nozzle housing has an air inlet, the other end of the nozzle housing has a nozzle outlet, and the top of the nozzle housing has a water inlet. A guide pipe is provided inside the nozzle housing, and a resonance cavity is provided outside the guide pipe.

7. A rotary retractable TADA atomizing jet dust suppression device for coal mine longwall face according to claim 6, characterized in that: The atomizing injector is equipped with a counter-rotating impeller mechanism located below the injection head. The counter-rotating impeller mechanism includes a primary motor with a primary impeller connected to it, and a secondary impeller connected to the secondary motor on one side of the primary impeller.

8. The TADA atomizing jet dust suppression device for rotating and retractable coal mine working face according to claim 7, characterized in that: The rotary mechanism includes a rotary bearing disposed in the through hole, a turntable disposed in the middle of the rotary bearing, the upper part of the turntable being fixedly connected to the connecting bracket, and a second drive motor disposed below the turntable, the output shaft of the second drive motor being fixedly connected to the turntable.

9. A rotary retractable TADA atomizing jet dust suppression device for coal mine longwall face according to claim 8, characterized in that: The pitch mechanism includes an electric push rod, one end of which is fixed at the middle position of the connecting bracket, and the other end of which is fixed to the atomizing injector.

10. A rotary retractable TADA atomizing jet dust suppression device for coal mine longwall face according to claim 9, characterized in that: Both drive motors are fixedly mounted on the atomizing injector, and the second drive motor is mounted inside the coal mining machine body.

Images