A dust suppression device for open-pit coal mining

Abstract

This invention relates to the field of fog cannon technology, specifically proposing a dust suppression device for open-pit coal mining. It includes a rotating base for support, a cannon head mounted on the surface of the rotating base, a fan mounted on the inner wall of the cannon head, a water spray ring mounted on the inner end of the cannon head, and multiple nozzles mounted on the surface of the water spray ring. This invention utilizes a rotatable water spray ring. When the water spray ring is horizontal, it is in a dormant state, where scale accumulates over a large area on the rugged surface of the sedimentation tank due to gravity. When vertical, it serves as the working chamber. A cleaning plate adheres to the surface of the sedimentation tank, ensuring a smooth interior for the water spray ring. This guarantees more uniform and stable water mist particles. During the transition between the dormant and working chambers, a sealing ring cleans the inner wall of the water spray ring, effectively increasing the service life of the working chamber, extending the lifespan of the water spray ring, reducing operating costs, and ensuring that the sprayed water mist remains consistently stable and uniform.

Description

Technical Field

[0001] This invention relates to the field of fog cannon technology, and specifically proposes a dust suppression device for open-pit coal mining. Background Technology

[0002] In open-air environments, to address dust pollution, various dust suppression devices are typically used in combination, depending on the specific work scenario, dust properties, and environmental requirements. These include fog cannons, high-pressure micro-mist dust suppression systems, and spray systems. Fog cannons, also known as long-range fog cannons, are devices that atomize water into micron-sized water mist particles under high pressure and then use a fan to spray them over a distance. The core principle is that the water mist particles combine with dust particles in the air, increasing their weight and causing them to settle to the ground under gravity, thereby achieving the purpose of dust suppression and air purification. Since open-pit coal mining requires blasting, which generates a large amount of dust, the fan inside the fog cannon will disperse the water mist over a large area, thus achieving the purpose of dust suppression.

[0003] To reduce operating costs, the water quality for dust suppression is usually not high. As a result, scale will form inside the spray ring after long-term use. The scale will change the shape and smoothness of the internal flow channels of the spray ring, causing the water flow to become turbulent. Ultimately, the sprayed water mist cannot form a uniform and complete cone shape, which will directly lead to a significant reduction in the effective range. In addition, the annular gaps inside the spray ring are relatively narrow, so it is difficult to clean the scale after it forms. Usually, the whole ring needs to be replaced regularly, which increases the cost of the equipment.

[0004] Therefore, there is an urgent need for a dust suppression device for open-pit coal mining that can delay the formation of scale and facilitate the cleaning of the inside of the water spray ring. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a dust suppression device for open-pit coal mining, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a dust suppression device for open-pit coal mining, comprising a rotating base for support, a blasting head mounted on the surface of the rotating base, a fan mounted on the inner wall of the blasting head, a water spray ring mounted on the inner wall of the blasting head, and multiple nozzles mounted on the surface of the water spray ring; two sets of nozzles are provided, each set of nozzles being equidistantly mounted in a ring on the surface of the water spray ring, a motor for driving the water spray ring to rotate mounted on the surface of the blasting head, a scale settling tank at the bottom of the water spray ring after rotation, a movable partition ring mounted inside the water spray ring, the bottom of the partition ring and the scale settling tank forming a dormant chamber for facilitating static scale deposition; the side wall of the water spray ring before rotation and the side wall of the partition ring forming a working chamber for facilitating dynamic water spraying, and a sealing ring mounted on the side wall of the partition ring for cleaning the inner wall of the water spray ring and improving the sealing between the dormant chamber and the working chamber.

[0007] Preferably, the side of the separator ring facing the scale settling tank is equipped with a cleaning plate for removing scale, and the surface of the spray ring is equipped with a drive assembly for driving the cleaning plate to rotate and clean the scale settling tank.

[0008] Preferably, the two sides of the sealing ring that fit against the inner wall of the water spray ring are set as bevels.

[0009] Preferably, the water spray ring includes a water ring sleeve and a sealing cap. The surface of the sealing cap has a circular groove. The surface of the water ring sleeve is fitted with a mounting assembly for tightly installing the sealing cap. The drive assembly includes two connecting rods fixedly mounted on the surface of the separator ring.

[0010] Preferably, the inner diameter of the circular groove is larger than the diameter of the connecting rod, and a conical sealing plug is fixedly installed on the surface of the connecting rod, with the sealing plug abutting against the inner wall of the circular groove.

[0011] Preferably, a rotating ring is fixedly installed on the top of the two connecting rods, and multiple extrusion rods are fixedly installed on the lower surface of the rotating ring. A rubber pad is fixedly installed at the lower end of the extrusion rod, and the rubber pad is attached to the surface of the sealing cover.

[0012] Preferably, the mounting assembly includes a mounting block with a threaded groove fixedly mounted on the surface of the water ring sleeve, a screw threaded onto the surface of the mounting block, and a pressing plate rotatably mounted on the end of the screw, the pressing plate abutting against the surface of the rotating ring.

[0013] Preferably, the screw has an anti-detachment plate threaded onto its surface, and the anti-detachment plate abuts against the surface of the sealing cap.

[0014] The above technical solution has the following advantages or beneficial effects: This invention provides a dust suppression device for open-pit coal mining. By setting a rotatable water spray ring, the water spray ring is in a dormant state when it is horizontal, and scale accumulates on the surface of the rugged scale tank due to gravity. When it is vertical, it is the working chamber during operation. The cleaning plate is attached to the surface of the scale tank, making the inside of the water spray ring smooth, thereby ensuring that the sprayed water mist particles are more uniform and stable. During the operation process of switching between the dormant chamber and the working chamber, the sealing ring cleans the inner wall of the water spray ring, which can effectively improve the service time of the working chamber, extend the service life of the water spray ring, reduce the operating cost, and at the same time ensure that the sprayed water mist is always in a stable and uniform state. Attached Figure Description

[0015] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0016] Figure 1This is a three-dimensional structural schematic diagram of a dust suppression device for open-pit coal mining provided by the present invention.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure under dust suppression water spray conditions.

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure in the dormant state.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the water ring in the water spray state.

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the water ring in its dormant state.

[0021] Figure 6 This is a schematic diagram of the three-dimensional structure inside the water ring sleeve.

[0022] Figure 7 This is a three-dimensional structural diagram of the drive component and the mounting component.

[0023] Figure 8 This is a partial sectional plan view of the cleaning plate location.

[0024] In the diagram: 1. Rotating base; 2. Cannon head; 3. Blower; 4. Water spray ring; 41. Water ring sleeve; 42. Sealing cover; 5. Nozzle; 6. Motor; 7. Settling tank; 8. Separating ring; 9. Sealing ring; 10. Cleaning plate; 11. Drive assembly; 111. Connecting rod; 12. Circular groove; 13. Mounting assembly; 131. Mounting block; 132. Screw; 133. Extrusion plate; 14. Sealing plug; 15. Rotary ring; 16. Extrusion rod; 17. Rubber pad; 18. Anti-detachment plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 It is a fog cannon used for dust suppression in open-pit coal mines, such as Figures 1-3As shown, the device includes a workbench placed directly on the ground. A rotating base 1 with a rotating function is installed on the workbench. A nozzle 2 is installed on the surface of the rotating base 1. The nozzle 2 can rotate on the surface of the rotating base 1 to change the angle at which the nozzle 2 is raised, thereby spraying dust-suppressing water mist at different distances. A high-power fan 3 is installed at the rear of the nozzle 2. A water spray ring 4 for storing water is installed at the front of the nozzle 2. Multiple nozzles 5 are fixedly installed on the surface of the water spray ring 4. In this embodiment, the multiple nozzles 5 are divided into two groups. Each group of nozzles 5 is installed in a ring at equal intervals. The spray nozzles of the nozzles 5 are all facing the axis of the nozzle 2. At the same time as the high-pressure water mist particles are sprayed out, the airflow blown by the fan 3 carries away the water mist particles, making the water mist coverage area wider. The water mist particles combine with the dust from coal mining, increasing the weight of the dust, thereby achieving the effect of dust suppression.

[0028] It should be noted that in the prior art, the two sets of nozzles 5 usually correspond to two water spray rings 4 respectively. In this embodiment, the two sets of nozzles 5 are installed inside one water spray ring 4. At this time, the internal space of the water spray ring 4 is larger, which makes it easier to clean the inside of the water spray ring 4, thereby reducing the frequency of replacing the water spray ring 4 and reducing the cost of use to a certain extent.

[0029] A motor 6 is fixedly mounted on the surface of the cannon head 2 via a motor mount. Rotary shafts and water inlet pipes are installed on both sides of the water spray ring 4. The water inlet pipes connect to a pipeline and a water pump (not shown in the figure) to form a high-pressure water mist. The motor 6 drives the rotating shafts to rotate, thereby causing the water spray ring 4 to rotate. This allows the water spray ring 4 to have two states: a working state and a dormant state. The working state is... Figure 2 In the vertical position shown, because the water inside is constantly flowing, there will be no significant scale buildup. The dormant state is... Figure 3 As shown in the horizontal state, it should be noted that if the inside of the water spray ring 4 is not full of water, the water droplets on the inner wall of the water spray ring 4 will dry quickly. The resulting scale will irregularly adhere to the inner wall of the water spray ring 4, which will greatly affect the range of the water mist spray and have a significant impact on the dust suppression effect. Therefore, the inside of the water spray ring 4 needs to be filled with water. At this time, the water spray ring 4 is in a completely horizontal state, and the scale will accumulate at the bottom of the water spray ring 4, which is convenient for later unified cleaning.

[0030] like Figures 4-8As shown, in this embodiment, the spray ring 4 is internally equipped with a movable partition ring 8. The partition ring 8 is moved by the drive assembly 11. A cleaning plate 10 is installed on one side of the partition ring 8. A scale settling groove 7 is formed on the side of the spray ring 4 near the cleaning plate 10. The uneven scale settling groove 7 makes it easier for scale to accumulate. The surface of the cleaning plate 10 is rough. A rubber sealing ring 9 is installed on the side of the partition ring 8. In the dormant state, the cleaning plate 10 of the partition ring 8 is away from the scale settling groove 7, and the spray ring is in operation. The inner cavity of ring 4 is a dormant cavity. When the separating ring 8 moves, it drives the sealing ring 9 to move and clean the inner wall of the spray ring 4. Scale accumulates on the surface of the scale settling tank 7. In the working state, the separating ring 8 moves and drives the cleaning plate 10 to fit into the scale settling tank 7. The sealing ring 9 cleans the inner wall of the spray ring 4 again. The inner cavity formed by the side of the separating ring 8 without the cleaning plate 10 and the side of the inner wall of the spray ring 4 without the scale settling tank 7 is the working cavity. At this time, the inner wall of the working cavity is smooth, forming a stable water flow, thereby ensuring that the water mist particles of the spray are more uniform.

[0031] In this embodiment, both sides of the sealing ring 9 that fit against the inner wall of the water spray ring 4 are set as inclined surfaces to ensure that the sealing ring 9 moves more smoothly during the process.

[0032] like Figure 4 and Figure 5As shown, the water spray ring 4 includes a water ring sleeve 41 with one end communicating with the outside. A sealing cap 42 is installed at the end of the water ring sleeve 41. It should be noted that a sealing element (not shown in the figure) is installed at the contact position between the sealing cap 42 and the water ring sleeve 41. The sealing element can be a rubber ring. The greater the compressive force on the surface of the sealing cap 42, the better the sealing performance between the sealing cap 42 and the water ring sleeve 41. In this embodiment, two symmetrical circular grooves 12 are formed on the surface of the sealing cap 42. The drive assembly 11 includes two connecting rods 111 installed in corresponding circular grooves 12. A conical sealing plug 14 is fixedly sleeved on the surface of the connecting rod 111. The inclined surface of the sealing plug 14 abuts against the inner wall of the circular groove 12 to ensure sealing performance. The two connecting rods 111 are fixedly connected by a rotating ring 15. Rotating the rotating ring 15 can drive the spray ring 411 through the connecting rods 111. The spacer ring 8 rotates, and an installation assembly 13 for tightly installing the sealing cap 42 is assembled on the surface of the water ring sleeve 41. The installation assembly 13 includes an installation block 131 fixedly installed on the surface of the water ring sleeve 41. The number of installation blocks 131 is set to a plurality of them, and they are installed in a ring array at equal intervals. The surface of the installation block 131 is provided with a through threaded groove. A screw 132 is installed in the threaded groove of the installation block 131. The end of the screw 132 is rotatably mounted with a pressing plate 133 via a bearing. The pressing plate 133 abuts against the surface of the rotating ring 15. A plurality of pressing rods 16 are fixedly installed on the lower surface of the rotating ring 15. The pressing rods 16 are arranged in a ring at equal intervals. A rubber pad 17 is fixedly installed on the lower end of the pressing rod 16. The lower end of the rubber pad 17 is in close contact with the surface of the sealing cap 42. An anti-detachment plate 18 is threadedly fitted on the surface of each screw 132. The anti-detachment plate 18 abuts against the surface of the sealing cap 42.

[0033] During assembly, rotating the screw 132 causes the extrusion plate 133 to move downward. The extrusion plate 133 abuts against the surface of the rotating ring 15 and moves downward. The rotating ring 15 causes the extrusion rod 16 and the connecting rod 111 to move downward. The extrusion rod 16 abuts against the surface of the sealing cover 42, which ensures that the sealing cover 42 is installed more tightly. At the same time, the sealing plug 14 on the extrusion rod 16 abuts against the inside of the circular groove 12 more tightly, ensuring the overall sealing performance during operation.

[0034] When it is necessary to clean the scale inside the scale settling tank 7, the screw 132 is rotated in the opposite direction, so that the squeezing plate 133 moves away from the rotating ring 15, and the anti-detachment plate 18 also detaches from the sealing cover 42. The rotating ring 15 is not subjected to squeezing force, so the rotating ring 15 can rotate. The rotating ring 15 drives the partition ring 8 to rotate through the connecting rod 111, and the cleaning plate 10 on the partition ring 8 will clean the scale.

[0035] It should be noted that in this design, the water spray ring 4 has two states: vertical and horizontal. In the horizontal state, it is a dormant chamber, but its interior is filled with water. This prevents scale from irregularly adhering due to drying and allows scale to accumulate over a large area on the surface of the sedimentation tank 7 due to gravity, facilitating final cleaning. In the vertical state, it is the working chamber. At this time, the cleaning plate 10 adheres to the surface of the sedimentation tank 7, ensuring the interior of the water spray ring 4 is smooth, thus guaranteeing more uniform and stable water mist particles. During the transition between the dormant and working chambers, the sealing ring 9 simultaneously cleans the inner wall of the water spray ring 4. Cleaning removes scale, effectively delaying scale deposition on the inner wall of the spray ring 4, ensuring its continuous and stable operation, and facilitating unified cleaning. Although this solution adds a separator ring 8, a sealing ring 9, and a connecting rod 111 compared to existing technologies, these are all conventional mechanical mechanisms in the field, without any high-cost, tight-fitting components, thus resulting in relatively low costs. Although the cost of the spray ring 4 is higher than that of existing technologies, it effectively reduces the frequency of spray ring 4 replacement, making the added cost negligible. The above-mentioned technical solution of this invention is a feature improvement based entirely on the above-mentioned existing technology and to solve the technical problems.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A dust suppression device for open-pit coal mining, characterized in that: It includes a rotating base for support, the surface of which is fitted with a cannon head, the inner wall of which is fitted with a fan at its tail, the inner wall of which is fitted with a water spray ring, and the surface of which is fitted with multiple nozzles. The nozzle is provided in two sets, and each set of nozzles is equidistantly mounted on the surface of the water spray ring in a ring. The surface of the nozzle is equipped with a motor that drives the water spray ring to rotate. The bottom of the water spray ring after rotation is provided with a scale settling tank. The inside of the water spray ring is equipped with a movable partition ring. The bottom of the partition ring and the scale settling tank form a dormant chamber that facilitates static scale deposition. The side wall of the water spray ring before rotation and the side wall of the partition ring form a working chamber that facilitates dynamic water spraying. The side wall of the partition ring is equipped with a sealing ring for cleaning the inner wall of the water spray ring and improving the sealing between the dormant chamber and the working chamber. The separating ring is equipped with a cleaning plate for removing scale on the side facing the scale settling tank, and the surface of the water spray ring is equipped with a drive component for driving the cleaning plate to rotate and clean the scale settling tank. The water spray ring includes a water ring sleeve and a sealing cap. The surface of the sealing cap has two symmetrical circular grooves. The surface of the water ring sleeve is fitted with an installation component for tightly installing the sealing cap. The drive component includes two connecting rods fixedly installed on the surface of the separator ring. A rotating ring is fixedly installed on the top of the two connecting rods, and a plurality of extrusion rods are fixedly installed on the lower surface of the rotating rings. A rubber pad is fixedly installed at the lower end of the extrusion rods, and the rubber pad is attached to the surface of the sealing cover.

2. The dust suppression equipment for open-pit coal mining according to claim 1, characterized in that: The two sides of the sealing ring that fit against the inner wall of the water spray ring are set as inclined surfaces.

3. The dust suppression equipment for open-pit coal mining according to claim 1, characterized in that: The inner diameter of the circular groove is larger than the diameter of the connecting rod, and a conical sealing cap is fixedly installed on the surface of the connecting rod, with the sealing cap abutting against the inner wall of the circular groove.

4. The dust suppression equipment for open-pit coal mining according to claim 3, characterized in that: The mounting assembly includes a mounting block with a threaded groove fixedly mounted on the surface of the water ring sleeve. A screw is threaded onto the surface of the mounting block, and a pressing plate is rotatably mounted on the end of the screw, with the pressing plate abutting against the surface of the rotating ring.

5. A dust suppression device for open-pit coal mining according to claim 4, characterized in that: The screw has an anti-detachment plate threaded onto its surface, and the anti-detachment plate abuts against the surface of the sealing cover.

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