A dust suppression device and method for a wind-water-linked fully mechanized tunneling machine

Abstract

The invention discloses a dust suppression device and method for a wind-water linkage type comprehensive tunneling machine, the device comprises a wind-water linkage device, a front-end spraying device, a side spraying device and a dust suction device, the front atomizing head of the front-end spraying device is arranged on a moving rotating device; the side spraying device and the dust suction device are arranged on both sides of the comprehensive tunneling machine, the dust suction device comprises a dust suction hood and a dust removal box, the dust removal box is connected to an air storage box, and the dust removal box is connected to a negative pressure generator, and the air storage box is connected to the wind-water linkage device; the air supply device comprises an air-oxygen mixing device, the air-oxygen mixing device is connected to an air outlet pipe through an air outlet pump, and a plurality of air outlet heads are arranged on the air outlet pipe; the invention realizes directional spray dust suppression, has a large operating area and a long spraying distance, is convenient for adjusting the spray size and direction, reduces the dust content at the head end of the comprehensive tunneling machine, improves the dust suppression effect at the head end, effectively controls the dust content in the mine, and the setting of the air supply device ensures the oxygen content under the mine.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine engineering, and in particular to a dust suppression device and method for a wind-water-linked fully mechanized tunneling machine. Background Art

[0002] During coal mining, a large amount of various dusts will be generated at the head of the tunnel boring machine during the excavation process. The dust not only affects the safe production of the coal mine, but also endangers the physical and mental health of the miners. In severe cases, dust explosion accidents will occur, which will directly affect the safe production of the mine. Therefore, the dust generated by excavation has always been a problem that needs to be solved urgently. Effectively controlling the dust in the mine is of great significance to promoting the safe production of the mine and protecting the physical and mental health of employees.

[0003] Currently, the commonly used dust removal method is to use a high-pressure water pump to spray high-pressure water, using water-powder mixing to reduce the dust content in the mine. However, although this method can effectively remove dust, excessive water spraying will cause water accumulation and water-coal problems, affecting the efficiency of tunneling work and production benefits.

[0004] Patent application No. 201410142665.6 discloses an efficient dust reduction device and method for underground fully mechanized tunnels in coal mines, which includes a high-efficiency spray dust reduction module 1 for a tunnel boring machine, a spray dust reduction module 2 for a belt conveyor, and an automatic spray dust reduction module 3 for a return air channel. The high-efficiency spray dust reduction module 1 for a tunnel boring machine includes an oil pressure-water pressure conversion device 4 and a wind-water linkage spray device 5, the spray dust reduction module 2 for a belt conveyor includes an automatic spray device 6 for coal and rock transportation, and the automatic spray dust reduction module 3 for a return air channel includes an automatic spray dust reduction device 7 for dust concentration exceeding the limit. Multiple modules are used to spray dust removal at the head of the tunnel boring machine, the belt conveyor, and the return air channel respectively. Although the dust generated by the fully mechanized tunnel working face operation can be solved, the amount of dust generated at the head of the tunnel boring machine during the tunneling process is large, and the conventional spray dust removal effect is not good, and it is impossible to spray dust removal in a designated area. At the same time, the oxygen content in the mine is low, and breathing difficulties are prone to occur. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dust suppression device and method for a wind-water linked comprehensive tunneling machine.

[0006] In order to solve the above technical problems, the present invention provides a dust suppression device for a wind-water-linked fully mechanized tunneling machine, which comprises:

[0007] Feng Shui linkage device;

[0008] A front-end spray device, comprising a front atomizing head, which is mounted on a movable rotating device and capable of horizontal movement and rotation. The front-end spray device is mounted on the head end of the excavator;

[0009] The side spray device includes a side atomizing head, which is fixed on the side atomizing pipe and the side atomizing pipe is distributed on both sides of the tunnel boring machine. The side atomizing pipe is connected to the wind and water linkage device;

[0010] A dust collection device is provided on both sides of the tunnel boring machine and arranged along the forward direction. The dust collection device includes a dust collection hood and a dust removal box. The dust collection hood is provided with a primary filter. The dust collection hood is connected to the dust removal box through a first air pipe. The dust removal box is connected to an air storage box and the dust removal box is connected to a negative pressure generator. The air storage box is connected to the air inlet of the wind and water linkage device.

[0011] The air supply device includes an air-oxygen mixing device, which is connected to the air storage box and is connected to an oxygen supply pipe. The air-oxygen mixing device is connected to an air outlet pipe through an air outlet pump. The air outlet pipe extends to the rear end of the multi-purpose excavator and is provided with a plurality of air outlet heads.

[0012] Preferably, the moving and rotating device includes a base fixed at the front end of the tunnel boring machine, the upper shaft of the base is connected to a slide groove, the front atomizing head is fixedly connected to a slider, the slider is slidably connected to the slide groove, and the front atomizing head is connected to the Feng Shui linkage device through a hose.

[0013] Preferably, a screw rod is movably connected in the slide groove, the screw rod is threadedly connected to the slider, one end of the screw rod extends out of the slide groove and is fixedly connected to gear 1, the shaft connecting the base and the slide groove is transmission-connected to a motor and its shaft is fixedly connected to gear 2, and gear 2 is meshed with gear 1.

[0014] Preferably, the gear ratio of gear 2 to gear 1 is 5-50:1.

[0015] Preferably, the air inlet of the wind and water linkage device is connected to an air inlet pipe, a gas booster pump is provided on the air inlet pipe, the end of the air inlet pipe away from the gas booster pump is connected to a gas T-joint, the gas T-joint is respectively connected to the supply air pipe and the underground compressed air air pipe, and the supply air pipe is connected to the air storage tank; the water inlet of the wind and water linkage device is connected to a water inlet pipe, a liquid booster pump is provided on the water inlet pipe, the end of the water inlet pipe away from the gas booster pump is connected to a liquid T-joint, the liquid T-joint is respectively connected to the supply water pipe and the cooling water pipe of the tunnel boring machine.

[0016] Preferably, the negative pressure generator is a high-pressure air pump, the inlet end of the high-pressure air pump is connected to the dust removal box, and the outlet end of the high-pressure air pump is connected to the air storage box.

[0017] Preferably, the dust removal box includes a box body, in which a secondary filter and a tertiary filter are arranged in sequence from bottom to top, activated carbon is filled between the secondary filter and the tertiary filter, an ash discharge port is provided on one side of the box body near the bottom and the bottom plate of the box body is an inclined structure.

[0018] Preferably, a fan blade assembly is movably connected to the primary filter, and the fan blades on the fan blade assembly are arranged to fit the primary filter.

[0019] Preferably, the dust hood is a bell-mouth structure and is distributed along the first air pipe. The first air pipe is connected to the dust removal box near the bottom through the second air pipe. The first air pipe and the side atomization pipe are arranged in parallel and are both fixed to the side of the tunnel boring machine through a vertical rod. A dust sensor is provided on the vertical rod.

[0020] The present invention also provides a method for reducing dust for a wind-water-linked fully-mechanized tunnel boring machine, using the above-mentioned wind-water-linked fully-mechanized tunnel boring machine dust reduction device, the method comprising the following steps:

[0021] 1) The front spray device sprays spray toward the head of the tunnel boring machine through the front atomizing head. At the same time, the negative pressure generator on the dust collection device is activated, and the air on both sides of the tunnel boring machine is sucked in and filtered through the dust collection hood to remove a small amount of dust on both sides of the tunnel boring machine.

[0022] 2) The air pressure on both sides of the tunnel boring machine decreases, causing gas flow on both sides of the machine head to disperse the dust content at the machine head. When the dust content on both sides of the tunnel boring machine reaches a certain threshold, the side spray device is activated to remove dust on both sides of the tunnel boring machine using the side atomizing head;

[0023] 3) The air after dust removal in the dust removal box enters the air storage box, part of it enters the wind and water linkage device, and the other part enters the gas-oxygen mixing device and is mixed with oxygen before being discharged through the gas outlet, thereby increasing the oxygen content in the mine.

[0024] The beneficial effects of the present invention are as follows: the present invention moves and rotates the front atomizing head through a moving rotating device to achieve directional spray dust reduction, and has a large operating area and a long spray distance, which is convenient for adjusting the spray size and direction. The dust suction device provided reduces the air pressure on both sides of the tunnel boring machine, so that the airflow at the head end of the tunnel boring machine flows to the rear ends on both sides, reducing the dust content at the head end of the tunnel boring machine, further improving the dust reduction effect at the head end, and the side spray device can spray dust reduction on both sides of the tunnel boring machine, thereby improving the dust reduction effect and effectively controlling the dust content in the mine, which is beneficial to the physical and mental health of the miners, and also solves the problem of water accumulation caused by spraying a large amount of water at the same part. The setting of the air supply device ensures the oxygen content under the mine and prevents the miners from having breathing difficulties. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the Feng Shui linkage device of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the mobile rotating device of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection between the dust collection device and the air supply device of the present invention;

[0029] Figure 5 This is a schematic diagram of the decomposition structure of the dust hood of the present invention;

[0030] Figure 6 It is a cross-sectional schematic diagram of the dust removal box of the present invention.

[0031] In the figure: 1. Wind and water linkage device; 11. Air inlet pipe; 12. Gas booster pump; 13. Gas T-piece; 14. Air supply pipe; 15. Air duct; 16. Water inlet pipe; 17. Liquid booster pump; 18. Liquid T-piece; 19. Water supply pipe; 110. Cooling water pipe for tunneling machine; 2. Front spray device; 21. Front atomizing head; 22. Slider; 23. Hose; 3. Side spray device; 31. Side atomizing head; 32. Side atomizing pipe; 4. Dust collection device; 41. Dust collection hood; 42. Primary filter; 43. First air pipe; 44. Air storage box; 45. Negative pressure generator; 46. Fan blade assembly; 47. Second air pipe; 5. Moving and rotating device; 51. Base; 52. Slide; 53. Screw; 54. Gear 1; 55. Motor; 56. Gear 2; 6. Air supply device; 61. Gas-oxygen mixing device; 62. Oxygen supply pipe; 63. Air outlet pipe; 64. Air outlet head; 7. Dust removal box; 71. Box body; 72. Secondary filter; 73. Tertiary filter; 74. Activated carbon; 75. Ash discharge port; 8. Vertical rod; 9. Dust sensor. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. All directional indications in the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] like Figure 1-6As shown, the present embodiment provides a dust suppression device for a wind-water linkage type comprehensive excavator, which includes: a wind-water linkage device 1, a front-end spraying device 2, a side spraying device 3 and a dust suction device 4. Specifically, the front-end spraying device 2 includes a front atomizing head 21, which is arranged on a moving and rotating device 5 and can move and rotate in the horizontal direction. The front-end spraying device 2 is arranged at the head end of the comprehensive excavator, and the front atomizing head 21 sprays dust on the head end of the comprehensive excavator. The side spraying device 3 includes a side atomizing head 31, which is fixed on a side atomizing pipe 32 and the side atomizing pipe 32 is distributed on both sides of the comprehensive excavator. The side atomizing pipe 32 is connected to the wind-water linkage device 1 and is used to spray dust on both sides of the comprehensive excavator. The dust suction device 4 is arranged on both sides of the comprehensive excavator and is arranged along the forward direction. The dust collection device 4 includes a dust collection hood 41 and a dust collection box 7. A primary filter 42 is provided on the dust collection hood 41. The dust collection hood 41 is connected to the dust collection box 7 through a first air pipe 43. The dust collection box 7 is connected to the air storage box 44 and the dust collection box 7 is connected to a negative pressure generator 45. The negative pressure generator 45 is a high-pressure air pump. The inlet end of the high-pressure air pump is connected to the dust collection box 7, and the outlet end of the high-pressure air pump is connected to the air storage box 44. The air storage box 44 is connected to the air inlet of the Feng Shui linkage device 1. Under the action of the negative pressure generator 45, negative pressure is generated inside the dust collection box 7, and the dust on both sides of the comprehensive excavation machine is sucked and dusted through the dust collection hood 41, and the air pressure on both sides of the comprehensive excavation machine is reduced, so that the rear side of the air box at the head end flows, disperses the dust, reduces the dust content at the head end, and improves the dust reduction effect of the front atomizing head 21. The air supply device 6 includes an air-oxygen mixing device 61, which is connected to the air storage box 44 and is connected to an oxygen supply pipe 62. The air-oxygen mixing device 61 is connected to an air outlet pipe 63 through an air outlet pump 62. The air outlet pipe 63 extends to the rear end of the comprehensive excavation machine and is provided with a plurality of air outlet heads 64. The air-oxygen mixing device 61 mixes the filtered air and oxygen, and then discharges them through the air outlet head 64 to ensure the oxygen content in the mine. In addition, an oxygen content sensor is set in the mine. According to the monitoring value, the flow rate of the oxygen supply pipe is adjusted, and then the oxygen content added is adjusted. The air outlet head 64 is set above the comprehensive excavation machine to increase the air pressure above the comprehensive excavation machine, so that the air flows from the bottom of the two sides of the upper box, which can not only achieve the effect of top dust reduction, but also ensure that the oxygen supply air flow is at the top, which is convenient for miners to breathe.

[0034] The Feng Shui linkage device 1 used in this example is a finished product of an existing conventional structure. For example, the ZP127 mining Feng Shui linkage sprinkler device may include a mixing box for mixing high-pressure gas and liquid to form a high-pressure gas-liquid mixed state, and a pressure gauge is provided on the mixing box to monitor the internal pressure at all times.

[0035] like Figure 3As shown, the mobile rotating device 5 includes a base 51 fixed at the front end of the tunnel boring machine, a slide 52 is connected to the axis of the base 51, a slider 22 is fixedly connected to the front atomizing head 21, the slider 22 is slidably connected to the slide 52, and the front atomizing head 21 is connected to the Feng Shui linkage device 1 through a hose 23. The gear 56 is engaged with the gear 1 54 and the gear 1 56 is engaged with the gear 1 54 .

[0036] like Figure 2 As shown, the air inlet of the wind and water linkage device 1 is connected to the air inlet pipe 11, and a gas booster pump 12 is provided on the air inlet pipe 11. The end of the air inlet pipe 11 away from the gas booster pump 12 is connected to a gas T-piece 13, and the gas T-piece 13 is respectively connected to the supply air pipe 14 and the underground compressed air air pipe 15. The supply air pipe 14 is connected to the air storage box 44, and the underground compressed air pipe 15 can be used as a power source, and its air pressure is 0.4-0.6MPa; the water inlet of the wind and water linkage device 1 is connected to the water inlet pipe 16, and a liquid booster pump 17 is provided on the water inlet pipe 16. The end of the water inlet pipe 16 away from the gas booster pump 12 is connected to the liquid T-piece 18, and the liquid T-piece 18 is respectively connected to the supply water pipe 19 and the tunnel boring machine cooling water pipe 110, so that a small amount of tunnel boring machine cooling water can be used to form a pneumatic spray.

[0037] like Figure 6 As shown, the dust removal box 7 includes a box body 71, in which a secondary filter 72 and a tertiary filter 73 are arranged from bottom to top, and activated carbon 74 is filled between the secondary filter 72 and the tertiary filter 73. An ash discharge port 75 is provided on one side of the box body 71 near the bottom, and the bottom plate of the box body 71 is an inclined structure. The filtration particle size of the primary filter 42, the secondary filter 72 and the tertiary filter 73 gradually decreases to achieve the purpose of gradual filtration, and the activated carbon 74 is used to remove the odor contained in the air.

[0038] like Figure 4 、 5As shown, a fan assembly 46 is movably connected to the primary filter 42. The blades of the fan assembly 46 are arranged in close contact with the primary filter 42. During the suction process of the dust hood 41, the blades of the fan assembly 46 rotate to scrape dust off the primary filter 42 and prevent clogging of the primary filter 42. The dust hood 41 has a bell-shaped structure and is distributed along the first air pipe 43 to increase the suction area. The first air pipe 43 is connected to the dust removal box 7 near the bottom through the second air pipe 47. The first air pipe 43 and the side atomization pipe 32 are arranged in parallel and are both fixed to the side of the tunnel boring machine via a vertical rod 8. The vertical rod 8 is equipped with a dust sensor 9. The dust sensor 9 monitors the dust content on both sides of the tunnel boring machine in real time. According to the dust content threshold, the side spray device 3 is activated, and the side atomization head 31 is used to spray dust reduction on the side of the tunnel boring machine.

[0039] The present invention also provides a method for reducing dust for a wind-water-linked multi-purpose excavator. The method uses the above-mentioned wind-water-linked multi-purpose excavator dust reduction device, and includes the following steps: the front spray device 2 sprays spray toward the head of the multi-purpose excavator through the front atomizing head 21. At the same time, the negative pressure generator 45 on the dust suction device 4 is activated, and the air on both sides of the multi-purpose excavator is sucked and filtered through the dust suction hood 41 to remove a small amount of dust on both sides of the multi-purpose excavator.

[0040] The air pressure on both sides of the tunnel boring machine decreases, and gas flows on both sides of the machine head end, dispersing the dust content at the machine head end. When the dust content on both sides of the tunnel boring machine reaches a certain threshold, the side spray device 3 is activated, and the side atomizing head 31 is used to remove dust on both sides of the tunnel boring machine.

[0041] The air after dust removal by the dust removal box 7 enters the air storage box 44, part of which enters the wind and water linkage device, and the other part enters the gas-oxygen mixing device 61 and is mixed with oxygen before being discharged through the gas outlet 64, increasing the oxygen content in the mine.

[0042] Its working principle is: the front atomizing head 21 is moved and rotated by the moving rotating device to realize directional spray dust reduction, and the operating area is large, the spraying distance is long, and the spray size and direction are easy to adjust. The dust suction device set reduces the air pressure on both sides of the comprehensive excavator, so that the airflow at the head end of the comprehensive excavator flows to the rear ends on both sides, reducing the dust content at the head end of the comprehensive excavator, and further improving the dust reduction effect at the head end. The side spray device 3 can spray dust reduction on both sides of the comprehensive excavator, improve the dust reduction effect, effectively control the dust content in the mine, which is beneficial to the physical and mental health of the miners, and also solves the problem of water accumulation caused by large-scale water spraying in the same part. The setting of the air supply device ensures the oxygen content under the mine and prevents miners from having breathing difficulties.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dust suppression device for a wind and water linkage type fully mechanized tunnel boring machine, characterized in that: include: Feng Shui linkage device; A front-end spray device, comprising a front atomizing head, which is mounted on a movable rotating device and capable of horizontal movement and rotation. The front-end spray device is mounted on the head end of the excavator; The side spray device includes a side atomizing head, which is fixed on the side atomizing pipe and the side atomizing pipe is distributed on both sides of the tunnel boring machine. The side atomizing pipe is connected to the wind and water linkage device; A dust collection device is provided on both sides of the tunnel boring machine and arranged along the forward direction. The dust collection device includes a dust collection hood and a dust removal box. The dust collection hood is provided with a primary filter. The dust collection hood is connected to the dust removal box through a first air pipe. The dust removal box is connected to an air storage box and the dust removal box is connected to a negative pressure generator. The air storage box is connected to the air inlet of the wind and water linkage device. The air supply device includes an air-oxygen mixing device, which is connected to the air storage box and is connected to an oxygen supply pipe. The air-oxygen mixing device is connected to an air outlet pipe through an air outlet pump. The air outlet pipe extends to the rear end of the multi-purpose excavator and is provided with a plurality of air outlet heads.

2. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 1, characterized in that: The mobile rotating device includes a base fixed on the front end of the comprehensive excavator, the upper shaft of the base is connected to a slide groove, the front atomizing head is fixedly connected to a slider, the slider is slidably connected to the slide groove, and the front atomizing head is connected to the Fengshui linkage device through a hose.

3. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 2, characterized in that: A screw rod is movably connected in the slide groove, and the screw rod is threadedly connected to the slider. One end of the screw rod extends out of the slide groove and is fixedly connected to gear 1. The shaft connecting the base and the slide groove is transmission-connected to a motor and its shaft is fixedly connected to gear 2, and gear 2 is meshed with gear 1.

4. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 3, characterized in that: The gear ratio of gear 2 to gear 1 is 5-50:

1.

5. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 1, characterized in that: The air inlet of the wind and water linkage device is connected to an air inlet pipe, a gas booster pump is provided on the air inlet pipe, the end of the air inlet pipe away from the gas booster pump is connected to a gas T-joint, the gas T-joint is respectively connected to the supply air pipe and the underground compressed air air pipe, the supply air pipe is connected to the air storage box; the water inlet of the wind and water linkage device is connected to a water inlet pipe, a liquid booster pump is provided on the water inlet pipe, the end of the water inlet pipe away from the gas booster pump is connected to a liquid T-joint, the liquid T-joint is respectively connected to the supply water pipe and the cooling water pipe of the tunnel boring machine.

6. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 5, characterized in that: The negative pressure generator is a high-pressure air pump, the inlet end of the high-pressure air pump is connected to the dust removal box, and the outlet end of the high-pressure air pump is connected to the air storage box.

7. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 1, characterized in that: The dust removal box includes a box body, in which a secondary filter and a tertiary filter are arranged in sequence from bottom to top, activated carbon is filled between the secondary filter and the tertiary filter, an ash discharge port is provided on one side of the box body near the bottom, and the bottom plate of the box body is an inclined structure.

8. The dust suppression device for a wind and water linkage type fully mechanized tunnel boring machine according to claim 7, characterized in that: The primary filter is movably connected to a fan blade assembly, and the fan blades on the fan blade assembly are fitted with the primary filter.

9. The dust suppression device for a wind and water linkage type tunnel boring machine according to claim 8, characterized in that: The dust hood has a bell-mouth structure and is distributed along the first air pipe. The first air pipe is connected to the dust removal box near the bottom through the second air pipe. The first air pipe and the side atomization pipe are arranged in parallel and are both fixed to the side of the tunnel boring machine through a vertical rod. A dust sensor is provided on the vertical rod.

10. A method for reducing dust from a wind-water-linked tunnel boring machine, characterized in that: The dust suppression device for a wind-water-linked fully mechanized tunnel boring machine according to any one of claims 1 to 9 is used, and the method comprises the following steps: 1) The front spray device sprays spray toward the head of the tunnel boring machine through the front atomizing head. At the same time, the negative pressure generator on the dust collection device is activated, and the air on both sides of the tunnel boring machine is sucked in and filtered through the dust collection hood to remove a small amount of dust on both sides of the tunnel boring machine. 2) The air pressure on both sides of the tunnel boring machine decreases, causing gas flow on both sides of the machine head to disperse the dust content at the machine head. When the dust content on both sides of the tunnel boring machine reaches a certain threshold, the side spray device is activated to remove dust on both sides of the tunnel boring machine using the side atomizing head; 3) The air after dust removal in the dust removal box enters the air storage box, part of it enters the wind and water linkage device, and the other part enters the gas-oxygen mixing device and is mixed with oxygen before being discharged through the gas outlet, thereby increasing the oxygen content in the mine.

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