Spraying dust fall equipment for environmental protection in coal mine conveying

Abstract

The invention relates to the technical field of coal mine transportation, in particular to spray-washing dust falling equipment for environmental protection in coal mine conveying, which comprises a dust falling box with a drain outlet in the bottom, and further comprises a dust collection cover with two through ends, the section of the dust collection cover is in an inverted U shape, and the dust collection cover covers the outer part of the joint of an upstream conveying belt and a downstream conveying belt. A drainage mechanism used for sucking air in the dust falling box to the outside to form negative pressure is arranged at the top of the dust falling box, and a pipeline system used for guiding air in the dust collecting cover into the dust falling box is arranged on the side portion of the dust falling box. The partition plate is arranged in the dust falling box, the flow guide structure is arranged at the higher end of the partition plate, after dust-containing airflow enters the circulation cavity channel through the dust inlet, the dust-containing airflow is converted into inclined airflow through cooperation of the first inclined face and the second inclined face, the inclined airflow and vertical water mist sprayed out of the spray head form cross flow, the contact time of dust particles and water drops is prolonged, and the dust falling efficiency is improved. And dust and liquid drops are collided at multiple angles, so that the spray washing and settling effect on fine dust is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine transportation, in particular to a spraying and dust reduction device for environmental protection during coal mine transportation. Background Art

[0002] After coal is mined, it needs to be transported from the well to the outside. In the existing technology, coal mines are in open-air environments and are mainly transported by conveyor belts. In order to transport coal over long distances, multiple conveyor belts are usually used to form a long-distance conveyor line, as shown in the attached manual. Figure 15 As shown, the tail end of the upstream conveyor belt 01 is connected to the head of the downstream conveyor belt 02 to carry out continuous transportation of coal mines, wherein, Figure 15 The arrows in the figure indicate the running directions of the two conveyor belts.

[0003] The transfer area is formed at the junction of the upstream conveyor belt 01 and the downstream conveyor belt 02, and there is usually a height difference in the transfer area. When the coal ore rolls down from the upstream conveyor belt 01 to the downstream conveyor belt 02, it is easy to raise dust in the transfer area, causing pollution to the surrounding environment. Therefore, dust reduction treatment is required. In the existing technology, spraying and dust reduction is usually used to reduce dust in coal mines. However, the structural layout of existing spraying and dust reduction equipment is not well adapted to the spatial structure of the transfer area. In addition, when working, traditional spraying and dust reduction equipment has poor spraying and settling effect on fine particles, which leads to poor spraying and dust reduction effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a spraying and dust reduction equipment that can be used for environmental protection during coal mine transportation to solve the technical problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A spray-wash dust reduction device for environmental protection during coal mine transportation includes a dust reduction box with a sewage outlet at the bottom, and a dust collection hood with two through-holes. The cross-section of the dust collection hood is an inverted U-shape. The dust collection hood is arranged outside the junction of the upstream conveyor belt and the downstream conveyor belt. The top of the dust reduction box is provided with a discharge mechanism for sucking the air inside the dust collection hood to the outside to form a negative pressure. The side of the dust reduction box is provided with a pipeline system for introducing the air in the dust collection hood into the dust reduction box. The dust reduction box is provided with a spray-washing mechanism for spraying and reducing dust.

[0007] An inclined partition is sealed and fixed in the dust suppression box between the spraying mechanism and the sewage outlet, and the higher end of the partition is on the same side as the connecting part of the pipeline system and the dust suppression box. The lower end of the partition is provided with a lower discharge port that runs through the upper and lower parts for the downward discharge of mud, and the higher end is provided with an ash inlet that runs through the upper and lower parts for the upward flow of dust-laden air. A guide structure is provided on the partition at a position corresponding to the ash inlet, and the guide structure is used to convert the dust-laden airflow into an inclined airflow.

[0008] Preferably, the top of the dust hood is provided with outlets on both sides of the transfer area formed by the upstream conveyor belt and the downstream conveyor belt, and the two outlets are connected to the pipeline system. The bottom of the dust hood is provided with an inlet below the transfer area for external air to enter the dust hood. During the spraying and dust reduction operation, the airflow entering the dust hood from the inlet is split into two tributaries on both sides. The airflow entering from the openings on both sides of the dust hood merges with the tributaries on the same side and flows into the pipeline system from the corresponding outlets.

[0009] Preferably, the guide structure includes vertical baffles and transverse baffles. The vertical baffles are fixed on the partition and are close to the ash inlet. The transverse baffles are fixed on the inner wall of the dust reduction box and are located above the vertical baffles. The upward extension line of the vertical baffles and the transverse baffles form a T-shaped structure. A flow cavity connected to the ash inlet and in an inverted L shape is formed between the vertical baffles, the transverse baffles and the inner wall of the dust reduction box.

[0010] Preferably, the top of the vertical baffle has a first slope whose height decreases as it is farther away from the lower discharge port, and the bottom of the horizontal baffle is provided with a second slope whose height increases as it is closer to the ash inlet at the corresponding position of the first slope. The first slope cooperates with the second slope to form an inclined airflow.

[0011] Preferably, the piping system includes an inlet pipe, a junction joint and a first dust suction pipe, one end of the inlet pipe is connected to the interior of the dust suppression box, and the other end is connected to the output port of the junction joint. Two of the input ports on the junction joint are respectively connected to one end of the two first dust suction pipes, and the other ends of the two first dust suction pipes are respectively connected to the corresponding outlet ports.

[0012] Preferably, the discharge mechanism includes a base, an exhaust fan, an outflow pipe and an exhaust duct. The exhaust fan is fixed to the top of the dust reduction box through the base. One end of the outflow pipe is connected to the air inlet of the exhaust fan, and the other end is connected to the top of the dust reduction box. One end of the exhaust duct is connected to the air outlet of the exhaust fan.

[0013] Preferably, the spraying mechanism includes a main water pipe, a diversion pipe and a nozzle. The main water pipe is fixed on the inner wall of one side of the dust suppression box. Several diversion pipes connected to the main water pipe are arranged at intervals along the length of the main water pipe. Each diversion pipe is kept perpendicular to the main water pipe. Several nozzles with nozzles facing in the direction of the nozzle are arranged in an array along the length of each diversion pipe. The main water pipe is connected to a water inlet pipe. The other end of the water inlet pipe extends through to the outside of the dust suppression box and is connected to the water pump in the external water tank.

[0014] Preferably, the dust collecting hood consists of a pair of arch frames and a flexible part arranged between the two arch frames, the two sides of the flexible part are respectively fixed to the arch frames, sealing plates are fixed to the bottom of the two arch frames, and the two outlets are respectively arranged at the top of the arch frames on the corresponding sides.

[0015] Preferably, the flexible portion is composed of a plurality of arched plates and arched rubber sheets, the arched plates and the arched rubber sheets are arranged alternately, and the arched plates are fixedly connected to adjacent arched rubber sheets.

[0016] Preferably, a mounting plate is fixed in the arch frame outside the upstream conveyor belt, and an upwardly arched arch cover whose shape matches that of the upstream conveyor belt is fixed above the mounting plate. There is a gap between the arch cover and the return surface below the upstream conveyor belt, and a concave dust suction chamber is provided above the arch cover. The junction joint adopts a three-inlet and one-outlet four-way joint, and a second dust suction pipe is connected to the other input port of the junction joint. The other end of the second dust suction pipe is connected to the bottom of the arch cover and is connected to the dust suction chamber.

[0017] Soft bristles are distributed on one side of the dust collection chamber on the arched cover. The soft bristles are used to sweep the dust adsorbed on the return surface below the upstream conveyor belt into the dust collection chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects.

[0019] A partition is provided in the dust suppression box, and a guide structure is provided at the higher end of the partition. After the dust-laden airflow enters the circulation cavity through the ash inlet, the dust-laden airflow is converted into an inclined airflow through the cooperation of the first inclined surface and the second inclined surface, forming a cross flow with the vertical water mist sprayed from the nozzle, thereby extending the contact time between dust particles and water droplets and making the dust and droplets collide at multiple angles, thereby improving the spraying and settling effect of fine dust, thereby effectively improving the spraying and dust reduction effect of the equipment as a whole;

[0020] The transfer area is completely covered by the inverted U-shaped dust hood. Combined with the layout of the openings on both sides of the dust hood, the inlet at the bottom, and the outlets on both sides of the top, a three-dimensional dust collection structure with downward suction and side discharge is formed, which adapts to the spatial layout of the transfer area formed by the two conveyor belts. After entering from the inlet, the external air is divided into tributaries on both sides, carrying dust and merging with the airflow entering from the openings on both sides. It is then sucked into the dust suppression box through the outlet, which improves the dust capture effect, prevents dust from escaping and spreading into the surrounding environment due to concentrated accumulation or air flow turbulence, and reduces pollution to the surrounding environment.

[0021] To address the dust adsorbed on the return surface of the upstream conveyor belt, an arched cover and soft bristles are added. The soft bristles are used to sweep the dust on the return surface of the upstream conveyor belt into the dust collection chamber. The dust is then connected to the junction through a second dust collection pipe. Under the action of negative pressure, the dust is sucked into the dust suppression box for treatment. This design realizes dynamic cleaning of the return surface of the upstream conveyor belt and avoids dust pollution on the return journey of the upstream conveyor belt.

[0022] The flexible part is composed of arched plates and arched rubber sheets connected alternately. When the soft arched rubber sheet serves as a connector between two adjacent arched plates, the flexible part as a whole can be bent and adjusted. After the flexible part is bent and adjusted, the cover is arranged at the connecting part of the upstream conveyor belt and the downstream conveyor belt to adapt to the reversing connection of the two conveyor belts. This makes this equipment suitable for both linear conveyor lines and reversing conveyor production lines, and has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the partial structure of the dust suppression box surface in the present invention;

[0025] Figure 3 This is a schematic diagram of the internal working principle of the dust suppression box;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure at center A;

[0027] Figure 5 Detailed structural diagram of the spray cleaning mechanism in the present invention;

[0028] Figure 6 It is a schematic diagram of the dust collecting hood structure layout in the present invention;

[0029] Figure 7 This is a schematic diagram of the airflow direction inside the dust hood;

[0030] Figure 8 for Figure 7 A magnified schematic diagram of the structure at point B in the middle;

[0031] Figure 9 for Figure 6 Schematic diagram of the cross section of the structure shown;

[0032] Figure 10 for Figure 9 A magnified schematic diagram of the structure at point C in the middle;

[0033] Figure 11 Detailed structural diagram of the dust collecting hood in the present invention;

[0034] Figure 12 Schematic diagram of the detailed structure of the flexible portion of the dust collecting hood of the present invention;

[0035] Figure 13 Schematic diagram of the diversion structure in the present invention;

[0036] Figure 14 This is the layout diagram of the dust collecting hood when two conveyor belts are reversed;

[0037] Figure 15 This is a schematic diagram of two conveyor belts connecting.

[0038] In the figure: 01, upstream conveyor belt; 02, downstream conveyor belt; 03, flow guide structure; 04, inclined airflow; 1, dust collecting hood; 101, inlet; 102, outlet; 103, support column; 104, foot; 11, arch frame; 111, sealing plate; 12, flexible part; 121, arch plate; 122, arched rubber sheet; 2, dust suppression box; 201, rectangular frame; 202, support leg; 21, sewage outlet; 3, drainage mechanism; 31, base; 32, exhaust fan; 33, outflow pipe; 3 4. Exhaust duct; 4. Piping system; 41. Inlet pipe; 42. Junction joint; 43. First dust suction pipe; 44. Second dust suction pipe; 5. Spraying mechanism; 51. Main water pipe; 52. Diverter pipe; 53. Nozzle; 54. Water inlet pipe; 6. Partition; 61. Lower outlet; 62. Ash inlet; 63. Vertical baffle; 631. First inclined plane; 64. Horizontal baffle; 641. Second inclined plane; 65. Flow cavity; 7. Arch cover; 701. Mounting plate; 71. Dust suction cavity; 72. Soft bristles. DETAILED DESCRIPTION

[0039] See also Figures 1-15 The present invention provides a spraying and dust reduction device for environmental protection during coal mine transportation. The embodiment of the present invention is described below in conjunction with the drawings in the embodiment of the present invention.

[0040] Example 1

[0041] See also Figures 1-15 The spraying and dust reduction equipment includes a dust reduction box 2 with a sewage outlet 21 at the bottom, and a dust collecting hood 1 with two through-holes. The cross section of the dust collecting hood 1 is an inverted U-shaped. The dust collecting hood 1 is arranged outside the junction of the upstream conveyor belt 01 and the downstream conveyor belt 02. The top of the dust reduction box 2 is provided with a discharge mechanism 3, the side of the dust reduction box 2 is provided with a pipeline system 4, and the dust reduction box 2 is provided with a spraying mechanism 5;

[0042] The top of the dust hood 1 is provided with outlets 102 on both sides of the transfer area formed by the upstream conveyor belt 01 and the downstream conveyor belt 02. Both outlets 102 are connected to the pipe system 4. The bottom of the dust hood 1 is provided with an inlet 101 below the transfer area for external air to enter the dust hood 1.

[0043] Specifically, such as Figure 11As shown, the dust collecting hood 1 consists of a pair of arch frames 11 and a flexible portion 12 arranged between the two arch frames 11. The two sides of the flexible portion 12 are respectively fixed to the arch frames 11, and the two outlets 102 are respectively arranged at the top of the arch frames 11 on the corresponding sides. A sealing plate 111 is fixed to the bottom of the two arch frames 11. Since no components are set at the bottom of the flexible portion 12, an inlet 101 is formed at the bottom of the flexible portion 12 and between the two sealing plates 111.

[0044] When the coal mine is transported in the open air using the conveyor line formed by the upstream conveyor belt 01 and the downstream conveyor belt 02, the spray-washing dust reduction equipment is arranged at the junction of the upstream conveyor belt 01 and the downstream conveyor belt 02. During operation, since the dust collecting hood 1 is arranged outside the junction of the upstream conveyor belt 01 and the downstream conveyor belt 02, the dust is dispersed in the dust collecting hood 1. The dust collecting hood 1 can intercept the dust generated by the rolling of the coal mine and prevent the dust from being randomly dispersed to the periphery.

[0045] Subsequently, the air in the dust reduction box 2 is sucked out to the outside through the operation of the discharge mechanism 3, so that a negative pressure is formed in the dust reduction box 2. The air mixed with dust in the dust collecting hood 1 is sucked into the dust reduction box 2 through the outlets 102 on both sides and the piping system 4 due to the negative pressure in the dust reduction box 2. The spraying mechanism 5 operates to spray and wash the dust entering the dust reduction box 2 to achieve dust reduction. The spraying water mixes with the dust to form sludge, which is finally discharged from the sewage outlet 21 at the bottom of the dust reduction box 2. By connecting the sewage outlet 21 with an external sewage filtration and treatment device (not shown in the figure), the water body can be filtered and recovered.

[0046] When the air mixed with dust in the dust hood 1 is sucked into the dust reduction box 2, the air outside the dust hood 1 enters the dust hood 1 from both ends of the dust hood 1 and the outlet 102 to be replenished to maintain the pressure balance inside and outside the dust hood 1.

[0047] Among them, since the two sides of the dust collecting cover 1 are connected, and the two outlets 102 are set on both sides of the transfer area, combined with the inlet 101 being set below the transfer area, Figure 7 As shown, the dotted arrows in the figure indicate the direction of the airflow. When vacuuming, the airflow entering the dust hood 1 from the inlet 101 will flow to the outlets 102 on both sides, and then be divided into two branches. The airflow entering from the openings on both sides of the dust hood 1 will first merge with the branches on the same side. The mixed airflow flows into the pipe system 4 through the outlet 102 on the same side, and finally flows into the dust suppression box 2 for spray cleaning;

[0048] Such a design allows the dust concentrated in the transfer area to be diverted to the outlets 102 on both sides, reducing the relative sealing of the dust, avoiding the high dust concentration affecting the dust collection effect, and forming a three-dimensional dust collection structure with downward suction and side discharge, which adapts to the spatial layout of the transfer area formed by the two conveyor belts, and cooperates with the air intake on both sides of the dust collecting hood 1 to improve the dust capture effect, avoid dust from escaping and spreading into the surrounding environment due to concentrated accumulation or air flow turbulence, and reduce pollution to the surrounding environment.

[0049] See also Figure 2 and Figure 3 The exhaust mechanism 3 includes a base 31, an exhaust fan 32, an outflow pipe 33 and an exhaust pipe 34. The exhaust fan 32 is fixed to the top of the dust reduction box 2 through the base 31. One end of the outflow pipe 33 is connected to the air inlet of the exhaust fan 32, and the other end is connected to the top of the dust reduction box 2. One end of the exhaust pipe 34 is connected to the air outlet of the exhaust fan 32. When the exhaust fan 32 works, the air in the dust reduction box 2 is sucked into the exhaust fan 32 through the outflow pipe 33, and finally discharged through the exhaust pipe 34, so that negative pressure is generated in the dust reduction box 2 to provide airflow drive for dust collection.

[0050] See also Figure 2 and Figure 6 The piping system 4 includes an inlet pipe 41, a junction joint 42 and a first dust suction pipe 43. One end of the inlet pipe 41 is connected to the interior of the dust reduction box 2, and the other end is connected to the output port of the junction joint 42. Two of the input ports on the junction joint 42 are respectively connected to one end of the two first dust suction pipes 43, and the other ends of the two first dust suction pipes 43 are respectively connected to the corresponding outlets 102. When the discharge mechanism 3 is working, the air in the dust collecting hood 1 is sucked into the first dust suction pipe 43 through the two outlets 102, and is merged into the inlet pipe 41 through the junction joint 42, and finally flows into the dust reduction box 2, realizing the dust collection work, so as to collect the dust generated in the transfer area into the dust reduction box 2, which is convenient for spraying and dust reduction.

[0051] See also Figure 3 and Figure 5 The spraying mechanism 5 includes a main water pipe 51, a diversion pipe 52 and a nozzle 53. The main water pipe 51 is fixed on the inner wall of one side of the dust suppression box 2. A number of diversion pipes 52 connected to the main water pipe 51 are arranged at intervals along the length direction of the main water pipe 51. Each diversion pipe 52 is perpendicular to the main water pipe 51. Each diversion pipe 52 is arranged in an array along the length direction of the main water pipe 51 with a number of nozzles facing in the direction. The main water pipe 51 is connected to a water inlet pipe 54. The other end of the water inlet pipe 54 extends through the outside of the dust suppression box 2 and is connected to the water pump in the external water tank (not shown in the figure).

[0052] The water pump in the external water tank works to pump the water in the external water tank from the water inlet pipe 54 to the main water pipe 51, and is diverted to each branch pipe 52 through the main water pipe 51, and finally sprayed downward by each nozzle 53 to spray and reduce dust on the air mixed with dust. A plurality of nozzles 53 are evenly distributed on the multiple branch pipes 52, and the multiple nozzles 53 are evenly distributed to form a spray network, ensuring that the spray coverage range is sufficient to cover the dust-laden airflow in the dust reduction box 2, thereby improving the dust reduction effect.

[0053] Example 2

[0054] Compared with the first embodiment, the present embodiment is different in that:

[0055] See also Figure 3 、 Figure 4 and Figure 13 In the dust suppression box 2, a partition plate 6 is sealed and fixed with an inclined extension between the spraying mechanism 5 and the sewage outlet 21. The upper surface of the partition plate 6 is aligned with the nozzle of each nozzle 53. The lower end of the partition plate 6 is provided with a lower discharge port 61 that passes through the upper and lower parts for the mud to be discharged downward, and the higher end is provided with an ash inlet 62 that passes through the upper and lower parts for the dust-laden airflow to flow upward.

[0056] Figure 3 and Figure 4 The solid arrow in the figure indicates the direction of the dust-laden airflow. It can be seen that the dust-laden airflow flowing into the dust suppression box 2 through the inlet pipe 41 flows upward from the dust inlet 62 to the spraying area, and the nozzle 53 sprays downward to spray and suppress the dust in the airflow. The dust settles when it encounters water droplets and falls on the partition 6 to form mud. Figure 3 The dotted arrows in the figure are a schematic diagram of the mud flow direction. It can be seen that due to the inclined arrangement of the partition 6, the mud flows along the partition 6 to the lower discharge port 61 at the lower position, and finally discharged through the lower discharge port 61 and can be discharged from the sewage outlet 21.

[0057] In addition, the water droplets sprayed from the nozzle 53 will impact downward on the partition 6 and splash to form a denser water droplet dust reduction area, further improving the spraying and dust reduction effect.

[0058] like Figure 4 and Figure 13 As shown, a guide structure 03 is provided on the partition 6 at a position corresponding to the ash inlet 62. The guide structure 03 includes a vertical baffle 63 and a horizontal baffle 64. The vertical baffle 63 is fixed on the partition 6 and is adjacent to the ash inlet 62. The horizontal baffle 64 is fixed on the inner wall of the dust reduction box 2 and is located above the vertical baffle 63. A flow cavity 65 connected to the ash inlet 62 and in an inverted L shape is formed between the vertical baffle 63, the horizontal baffle 64 and the inner wall of the dust reduction box 2.

[0059] Among them, the top of the vertical baffle 63 has a first inclined surface 631 whose height decreases as it is away from the lower discharge port 61, and the bottom of the horizontal baffle 64 is provided with a second inclined surface 641 whose height increases as it is closer to the ash inlet 62 at the corresponding position of the first inclined surface 631. The first inclined surface 631 cooperates with the second inclined surface 641 to form an inclined airflow 04.

[0060] Figure 4 The solid arrow in the figure indicates the direction of air flow. It can be seen that after the dust-laden airflow enters the dust suppression box 2, it flows into the circulation cavity 65 through the dust inlet 62, and finally flows out of the circulation cavity 65 to the bottom of the nozzle 53 for spraying.

[0061] Among them, under the cooperation of the first inclined surface 631 and the second inclined surface 641, the top outlet of the flow channel 65 is inclined, and the flow channel 65 is connected to the top outlet of the flow channel 65. Figure 4 and Figure 5 , and then the dust-laden airflow is ejected from the inclined outlet at the top of the flow cavity 65, forming an inclined airflow 04. The inclined airflow 04 forms a cross flow with the vertically downward water mist, and the movement trajectory of the dust particles is extended, thereby extending the residence time of the dust particles in the water mist area, increasing the probability of collision with water droplets, and the inclined airflow 04 causes the dust particles to collide with the droplets at multiple angles in both the horizontal and vertical directions, thereby improving the capture effect of tiny fine dust and effectively improving the dust reduction effect.

[0062] like Figure 4 As shown, the angle between the second inclined surface 641 and the horizontal plane is defined as X, and the angle between the first inclined surface 631 and the horizontal plane is defined as Y, wherein 15°≤X≤Y≤35°, X in the present application is preferably 20°, and Y is preferably 25°. With such a design, the first inclined surface 631 and the second inclined surface 641 guide the airflow blown out from the outlet of the flow cavity 65 to a state tending to be horizontal, so as to enhance the degree of cross-flow between the inclined airflow 04 and the water mist.

[0063] Furthermore, the design in which Y is greater than X allows the distance between the second inclined surface 641 and the first inclined surface 631 to gradually expand outward, which helps the ejected inclined airflow 04 to diffuse, expand the dust distribution range, and improve the uniformity of dust distribution.

[0064] Secondly, when the airflow passes through, the flow velocity decreases due to the increase in the flow area, which prevents the airflow from having a high flow velocity and carrying dust to quickly penetrate the water mist layer, further increasing the relative interaction time between dust and water droplets.

[0065] Among them, the upward extension line of the vertical baffle 63 and the horizontal baffle 64 form a T-shaped structure. The horizontal baffle 64 extends to one side of the lower discharge port 61. Combined with the air outlet effect at the top of the lower discharge port 61, it can prevent droplets from entering the circulation cavity 65 and the ash inlet 62, causing dust to be adsorbed by water and affecting the normal circulation of the dust-laden airflow.

[0066] In addition, the higher end of the partition 6 is on the same side as the connecting part of the pipeline system 4 and the dust suppression box 2, that is, the higher end of the partition 6 is on the same side as the inlet pipe 41, which can prevent the sludge discharged from the lower discharge port 61 from flowing to the side of the ash inlet 62 and causing pollution.

[0067] Example 3

[0068] After the coal on the upstream conveyor belt 01 rolls down onto the downstream conveyor belt 02, a large amount of dust is adsorbed on the downward return surface of the upstream conveyor belt 01. As the upstream conveyor belt 01 vibrates during operation, the dust on the return surface will gradually be shaken off, thereby polluting the environment along the way. To improve this problem, the present invention makes the following improvements:

[0069] The difference between this embodiment and the second embodiment is that:

[0070] See also Figure 2 、 Figure 6 as well as Figure 7-10 A mounting plate 701 is fixed in the arch frame 11 outside the upstream conveyor belt 01, and an arch cover 7 is fixed above the mounting plate 701. There is a gap between the arch cover 7 and the return surface below the upstream conveyor belt 01. There is a concave dust suction chamber 71 above the arch cover 7. The junction joint 42 adopts a three-input and one-out four-way joint. The other input port of the junction joint 42 is connected to a second dust suction pipe 44. The other end of the second dust suction pipe 44 is connected to the bottom of the arch cover 7 and is connected to the dust suction chamber 71. Soft bristles 72 are evenly distributed on one side of the dust suction chamber 71 on the arch cover 7.

[0071] When the upstream conveyor belt 01 returns, the return surface below it contacts the soft brush bristles 72. Figure 8 The middle arrow indicates the running direction of the return surface of the upstream conveyor belt 01. It can be seen that the soft bristles 72 can be used to sweep the dust adsorbed on the return surface of the upstream conveyor belt 01 to the side of the dust collection chamber 71. At the same time, when the discharge mechanism 3 is working, the air in the dust collection chamber 71 is sucked into the dust reduction box 2 through the second dust collection pipe 44, so that a negative pressure is formed in the dust collection chamber 71, and the external air enters the dust collection chamber 71 through the gap between the arch cover 7 and the return surface below the upstream conveyor belt 01 for replenishment. At the same time, the dust scattered from the dust collection chamber 71 can be sucked into the dust reduction box 2 for spraying and dust reduction, thereby achieving the cleaning of the return surface of the upstream conveyor belt 01 and avoiding pollution to the environment along the return journey.

[0072] In addition, in order to prevent coal from falling from the side during transportation, the upstream conveyor belt 01 and the downstream conveyor belt 02 are set to be concave. Therefore, the arched cover 7 in this application is arched upward, which can be well adapted to the upstream conveyor belt 01, thereby improving the capture effect of the dust swept down by the soft bristles 72.

[0073] Example 4

[0074] Due to factors such as terrain and production lines, the conveyor production line is not distributed in a straight line and there may be turns in the middle, such as Figure 14 As shown, the upstream conveyor belt 01 and the downstream conveyor belt 02 are not arranged in a straight line, but are arranged at an angle. In order to meet the requirements of the reversing connection between the two conveyor belts, the present application has made the following improvements:

[0075] The difference between this embodiment and the third embodiment is that:

[0076] See also Figure 11 and Figure 12 The flexible portion 12 is composed of a plurality of arched plates 121 and arched rubber sheets 122 . The arched plates 121 and the arched rubber sheets 122 are arranged alternately, and the arched plates 121 are fixedly connected to adjacent arched rubber sheets 122 .

[0077] The arched rubber sheet 122 is a flexible material with a soft texture and the ability to deform. When the arched rubber sheet 122 is used as a connecting piece between two adjacent arched plates 121, the flexible portion 12 can be bent and adjusted as a whole. Figure 14 As shown, the arch frame 11 containing the arch cover 7 is covered on the upstream conveyor belt 01, and the other arch frame 11 is covered on the flexible part 12. After the flexible part 12 is bent and adjusted, the cover is arranged at the connecting part of the upstream conveyor belt 01 and the downstream conveyor belt 02 to adapt to the reversing connection of the two conveyor belts, so that the equipment is suitable for both linear conveyor lines and reversing conveyor production lines, and has high versatility.

[0078] in, Figure 14 The figure does not show the actual bending state of the flexible portion 12. For the convenience of reading this application with reference to the accompanying drawings, Figure 14 The bending state of the flexible portion 12 is only a simplified expression.

[0079] In addition, if Figure 2 As shown, the dust suppression box 2 is fixedly mounted on the outside with a rectangular frame 201 composed of four square tubes welded end to end, and support legs 202 extending vertically upward are fixed at the four top corners of the rectangular frame 201 to stably support and lift the dust suppression box 2.

[0080] In addition, if Figure 6 As shown, vertical downward supporting columns 103 are evenly distributed at the bottom of the two arched frames 11, and a foot 104 is fixed to the bottom end of each supporting column 103 for firmly supporting and arranging the dust collecting hood 1.

[0081] It is worth noting that the first dust suction pipe 43 and the second dust suction pipe 44 in this application are both soft pipes with the ability to bend and deform. At the same time, the first dust suction pipe 43 and the second dust suction pipe 44 are both reserved with a certain length to adapt to the position changes when the equipment is arranged in different ways. The figure is only a simplified expression and does not show the actual length of each pipe in detail.

[0082] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A spray-wash dust reduction device for environmental protection during coal mine transportation, comprising a dust reduction box (2) with a sewage outlet (21) at the bottom, characterized in that: It also includes a dust collecting hood (1) with two through ends, the cross section of the dust collecting hood (1) being in an inverted U shape, and the dust collecting hood (1) being arranged outside the junction of the upstream conveyor belt (01) and the downstream conveyor belt (02); The top of the dust suppression box (2) is provided with a discharge mechanism (3) for sucking the air inside the box to the outside to form a negative pressure; The side of the dust reduction box (2) is provided with a pipeline system (4) for introducing the air in the dust collecting hood (1) into the dust reduction box (2); The dust reduction box (2) is provided with a spraying mechanism (5) for spraying and reducing dust; An inclined and extending partition (6) is sealed and fixed in the dust suppression box (2) between the spraying mechanism (5) and the sewage outlet (21), and a higher end of the partition (6) is located on the same side as the connecting portion between the pipeline system (4) and the dust suppression box (2); The lower end of the partition (6) is provided with a vertically penetrating lower discharge port (61) for discharging mud downward, and the upper end is provided with a vertically penetrating ash inlet (62) for the upward flow of dust-laden air. A flow guiding structure (03) is provided on the partition plate (6) at a position corresponding to the ash inlet (62), and the flow guiding structure (03) is used to convert the dust-laden airflow into an inclined airflow (04).

2. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 1 is characterized in that: The top of the dust collecting hood (1) is provided with outlets (102) on both sides of the transfer area formed by the upstream conveyor belt (01) and the downstream conveyor belt (02), and both outlets (102) are connected to the pipeline system (4); The bottom of the dust collecting hood (1) and located below the transfer area has an inlet (101) for external air to enter the dust collecting hood (1); During the spraying and dust reduction operation, the airflow entering the dust collecting hood (1) from the inlet (101) is split into two branches to the two sides, and the airflow entering from the openings on both sides of the dust collecting hood (1) respectively merges with the branches on the same side and flows into the pipeline system (4) from the corresponding outlet (102).

3. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 1 is characterized in that: The guide structure (03) includes vertical blocking bars (63) and transverse blocking bars (64); The vertical baffle (63) is fixed on the partition (6) and is adjacent to the ash inlet (62), and the transverse baffle (64) is fixed on the inner wall of the dust suppression box (2) and is located above the vertical baffle (63); The upward extension line of the vertical blocking bar (63) and the horizontal blocking bar (64) form a T-shaped structure; A flow channel (65) in an inverted L shape is formed between the vertical baffle (63), the transverse baffle (64) and the inner side wall of the dust suppression box (2), and is connected to the ash inlet (62).

4. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 3 is characterized in that: The top of the vertical blocking bar (63) has a first inclined surface (631) whose height decreases the further away from the lower outlet (61); A second inclined surface (641) whose height increases as it approaches the ash inlet (62) is provided at the bottom of the transverse blocking bar (64) at a position corresponding to the first inclined surface (631); The first inclined surface (631) cooperates with the second inclined surface (641) to form an inclined airflow (04).

5. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 2 is characterized in that: The pipeline system (4) includes an inlet pipe (41), a confluence joint (42) and a first dust suction pipe (43); One end of the inlet pipe (41) is in communication with the interior of the dust suppression box (2), and the other end is in communication with the output port of the confluence joint (42); Two of the input ports on the confluence joint (42) are respectively connected to one end of the two first dust suction pipes (43), and the other ends of the two first dust suction pipes (43) are respectively connected to the corresponding outlet ports (102).

6. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 1 is characterized in that: The drainage mechanism (3) comprises a base (31), an exhaust fan (32), an outflow pipe (33) and an exhaust pipe (34); The exhaust fan (32) is fixed to the top of the dust reduction box (2) via the base (31); One end of the outflow pipe (33) is in communication with the air inlet of the exhaust fan (32), and the other end is in communication with the top of the dust suppression box (2); One end of the exhaust pipe (34) is in communication with the air outlet of the exhaust fan (32).

7. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 1 is characterized in that: The spray washing mechanism (5) comprises a main water pipe (51), a diversion pipe (52) and a spray head (53); The main water pipe (51) is fixed on the inner wall of one side of the dust suppression box (2), and a plurality of branch pipes (52) are arranged at intervals along the length direction of the main water pipe (51) and are all connected to the main water pipe (51), and each of the branch pipes (52) is kept perpendicular to the main water pipe (51); Each of the diversion pipes (52) is provided with a plurality of nozzles (53) arranged in an array along its length direction, with nozzles all facing the nozzles; The main water pipe (51) is connected to a water inlet pipe (54), and the other end of the water inlet pipe (54) extends through the outside of the dust suppression box (2) and is connected to a water pump in an external water storage tank.

8. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 5 is characterized in that: The dust collecting hood (1) is composed of a pair of arch frames (11) and a flexible portion (12) arranged between the two arch frames (11), and both sides of the flexible portion (12) are fixed to the arch frames (11) respectively; A sealing plate (111) is fixed to the bottom of each of the two arched frames (11); The two outlets (102) are respectively arranged on the top of the arch frame (11) on the corresponding side.

9. The spray-washing dust suppression equipment for environmental protection during coal mine transportation according to claim 8, characterized in that: The flexible portion (12) is composed of a plurality of arched plates (121) and an arched rubber sheet (122); The arched plates (121) and the arched rubber sheets (122) are arranged alternately, and the arched plates (121) are fixedly connected to adjacent arched rubber sheets (122).

10. The spray-washing dust reduction equipment for environmental protection during coal mine transportation according to claim 8, characterized in that: A mounting plate (701) is fixed inside the arch frame (11) located outside the upstream conveyor belt (01), and an upwardly arched arch cover (7) is fixed above the mounting plate (701) and has a shape adapted to the upstream conveyor belt (01); There is a gap between the arch cover (7) and the return surface below the upstream conveyor belt (01); The arched cover (7) has a concave dust suction chamber (71) above it, and soft bristles (72) are evenly distributed on one side of the dust suction chamber (71) on the arched cover (7), and the soft bristles (72) are used to sweep the dust adsorbed on the return surface below the upstream conveyor belt (01) into the dust suction chamber (71); The confluence joint (42) is a four-way joint with three inlets and one outlet. Another input port of the confluence joint (42) is connected to a second dust suction pipe (44). The other end of the second dust suction pipe (44) is connected to the bottom of the arch cover (7) and is in communication with the dust suction chamber (71).

Images