Mining dust fall device

Abstract

The invention belongs to the technical field of mining auxiliary equipment, and discloses a mining dust fall device which comprises a moving main body, a suction ventilation assembly is fixedly mounted at the top of the moving main body, a mixing box is arranged at the top of the suction ventilation assembly in a communicating mode, and a primary spraying mechanism is rotationally arranged in the mixing box in a sleeving mode. A liquid supply mechanism is arranged on the outer side of the moving main body, the liquid supply mechanism is communicated with the primary spraying mechanism, and the top of the mixing box is communicated with a secondary spraying mechanism. High-concentration dust near an explosion point or a loading point is actively sucked into the mixing box through the suction ventilation assembly; the primary spraying mechanism rotates under liquid supply to form annular water mist, so that mixed fluid is sheared and refined in the mixing box; and after entering the secondary spraying mechanism through the through groove, an arc-shaped water curtain is sprayed to a working surface, so that continuous treatment of active trapping, forced mixing and surface domain covering is realized, the coupling rate of fine particle dust is remarkably improved, and external expansion and diffusion are inhibited.

Description

Technical Field

[0001] This invention belongs to the field of mining auxiliary equipment technology, specifically a dust suppression device for mining operations. Background Technology

[0002] Mining operations (drilling, blasting, tunneling, loading, unloading, transportation, etc.) generate large amounts of inhalable dust and ultrafine particles (PM10 / PM2.5). High concentrations of dust not only induce occupational diseases such as pneumoconiosis, but also reduce visibility in the work area, increase the risk of slippage and derailment, affect the reliability of electrical equipment and sensors, and cause diffuse pollution to the surrounding environment. Existing dust suppression technologies mainly include: spraying, mist cannons with pneumatic conveying, suction, and washing combinations, but the following technical bottlenecks are commonly encountered in mining scenarios:

[0003] Insufficient capture of inhalable fine dust: Conventional spraying produces mostly larger droplets that rely on gravity settling, making it difficult to fully collide and couple with suspended dust particles of smaller size in the air; when the incoming flow is high-speed or turbulent and unstable, the droplets are actually pushed away by the airflow, affecting the dust suppression effect;

[0004] Passive spraying and lack of "source intake" capability: Dust clouds are generated near the blasting or loading point and spread rapidly with the airflow. Traditional solutions mainly spray into the space instead of actively sucking in high-concentration dust clouds and forcibly mixing them inside, resulting in insufficient contact probability and residence time between droplets and dust. Summary of the Invention

[0005] The purpose of this invention is to provide a dust suppression device for mining operations to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dust suppression device for mining operations, comprising a mobile main body, an intake ventilation component fixedly installed on the top of the mobile main body, a mixing box connected to the top of the intake ventilation component, a primary spraying mechanism rotatably mounted inside the mixing box, a liquid supply mechanism on the outside of the mobile main body connected to the primary spraying mechanism, a secondary spraying mechanism connected to the top of the mixing box, the secondary spraying mechanism spraying arc-shaped water mist toward the dust removal area, and a shock wave reaction mechanism on the outer wall of the mixing box;

[0007] The intake ventilation assembly includes a ventilation duct, a reduction chamber, a fan, a main intake pipe, and an auxiliary intake pipe. One end of the auxiliary intake pipe is connected to the reduction chamber, and the other end faces the dust removal area.

[0008] Preferably, the ventilation duct is fixed to the top of the movable body, the reduction cavity is opened inside the ventilation duct, the fan is installed inside the reduction cavity, the main suction pipe is connected to the bottom of the outside of the ventilation duct and communicates with the reduction cavity, and the auxiliary suction pipe is located above the main suction pipe and the auxiliary suction pipe faces the same direction as the main suction pipe.

[0009] Preferably, the mixing tank includes a tank body, an inlet hole, an outlet groove, an annular groove, and a liquid inlet hole. The tank body is fixed to the top of the ventilation duct. The inlet hole is located at the bottom of the tank body and communicates with the shrinkage cavity. The outlet groove is located at the top of the tank body. The annular groove is located on the inner wall of the tank body. The liquid inlet hole is located on the outer wall of the tank body and communicates with the annular groove.

[0010] Preferably, the primary spraying mechanism includes a rotating ring, a connecting ring groove, and a nozzle. The rotating ring is rotatably sleeved in the ring groove, the connecting ring groove is formed on the outer wall of the rotating ring, the nozzle is fixedly connected to the inner wall of the rotating ring, and one end of the nozzle communicates with the ring groove. The connecting ring groove communicates with the liquid inlet.

[0011] Preferably, the liquid supply mechanism includes a liquid pump and a liquid pipe, wherein the outlet end of the liquid pump is connected to the liquid pipe, and the upper end of the liquid pipe is connected to the liquid inlet.

[0012] Preferably, a drive rotating part is fixedly provided on the top of the mixing box. The drive rotating part controls the rotation of the primary spraying mechanism. The drive rotating part includes a motor, a rotating shaft, and an intermediate plate. The motor is fixed to the top of the mixing box by a support base. One end of the rotating shaft is fixedly connected to the output shaft of the motor, and the other end of the rotating shaft passes through the top of the mixing box and is fixedly connected to the intermediate plate. The intermediate plate is fixedly connected to the inner wall of the rotating ring. A filtering mechanism is provided in the mixing box. The filtering mechanism includes a filter screen, a scraper, and a support rod. The filter screen is fixed in the outlet groove. The scraper slides against the bottom of the filter screen. The support rod is fixed on the intermediate plate and is fixedly connected to the scraper.

[0013] Preferably, the secondary spraying mechanism includes an arc-shaped frame, a guide frame, a second guide surface, and a second nozzle. The guide frame is fixedly connected to the bottom of the arc-shaped frame, the second guide surface is opened on the arc-shaped frame, the second nozzle is evenly distributed on the arc-shaped frame and communicates with the inside of the arc-shaped frame, the top of the mixing box is fixedly connected to a fixed frame, the fixed frame is connected to the outlet groove, and the guide frame is detachably sleeved on the fixed frame.

[0014] Preferably, the shock wave reaction mechanism includes an arc-shaped groove, an elastic diaphragm, and a ventilating arc plate. The arc-shaped groove is formed on the outer surface of the housing and faces the same direction as the auxiliary suction pipe. The elastic diaphragm and the ventilating arc plate are both fixed in the arc-shaped groove. The elastic diaphragm is located on the outer side. The ventilating arc plate is provided with a through hole. A buffer cavity is provided between the ventilating arc plate and the elastic diaphragm.

[0015] Preferably, the bottom of the inner cavity of the box is provided with a guide surface, and the box is provided with a self-cleaning part fixed to the bottom of the middle plate. The self-cleaning part includes a cleaning plate and a connecting rod. The cleaning plate is adapted to the guide surface, one end of the connecting rod is fixedly connected to the cleaning plate, and the other end of the connecting rod is fixed to the bottom of the middle plate.

[0016] Preferably, the mixing tank has a slag discharge port on its side, and the slag discharge port has a sealing end. The sealing end includes an installation frame, a sealing plug, a threaded post, and a locking ring. The installation frame is fixed to the outer wall of the mixing tank and communicates with the slag discharge port. The sealing plug is movably sleeved in the installation frame. The threaded post is fixed to the installation frame and movably sleeved with the sealing plug. The locking ring is threadedly sleeved on the threaded post.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention actively draws high-concentration dust near the explosion point or loading point into the mixing chamber by relying on the intake ventilation component; the primary spraying mechanism rotates under liquid supply to form a circumferential water mist, which causes the mixed fluid to be sheared and refined in the mixing chamber; after entering the secondary spraying mechanism through the outlet trough, it sprays an arc-shaped water curtain onto the working surface, thereby realizing continuous processing of "active collection, forced mixing and area coverage", which significantly improves the coupling rate of fine particulate dust and inhibits outward diffusion.

[0019] 2. This invention achieves partial absorption and controllable coupling of blast energy by setting up a shock wave reaction mechanism composed of an elastic arc-shaped diaphragm, a ventilated arc plate, and a buffer cavity. When the blast shock wave acts, the vibration of the elastic arc-shaped diaphragm converts the impact energy into gas pulsation in the cavity. This pulsation is injected into the mixing box through the pulsation conduction hole on the ventilated arc plate, forming a short-term air pressure fluctuation field. This field generates periodic shearing and turbulence enhancement on the droplets in the mixing box, thereby achieving secondary droplet refinement and enhanced mixing. This does not interfere with the main air intake passage, is not affected by dust blockage, and can automatically improve the dust suppression response during the blast period, significantly improving the collection efficiency and atomization uniformity of fine particulate dust.

[0020] 3. This invention achieves continuous scraping of bottom deposits and anti-clogging treatment by driving the rotating part to link the self-cleaning part and the filtration mechanism; when cleaning is required, the slag can be quickly discharged by opening the sealing end of the slag discharge port, reducing the risk of mud deposition and filter blockage, reducing downtime maintenance, and ensuring long-term stable spraying and smooth airflow. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the present invention;

[0023] Figure 3This is a schematic diagram of the secondary ejection mechanism of the present invention;

[0024] Figure 4 This is a cross-sectional view of the mixing tank and primary ejection mechanism of the present invention;

[0025] Figure 5 This is a cross-sectional schematic diagram of the mixing box of the present invention;

[0026] Figure 6 This is a schematic diagram showing the connection between the drive rotating part and the primary ejection mechanism of the present invention;

[0027] Figure 7 This is an exploded view of the sealing end of the present invention.

[0028] In the diagram: 1. Moving main body; 2. Intake ventilation assembly; 201. Ventilation duct; 202. Reduction chamber; 203. Fan; 204. Main intake pipe; 205. Auxiliary intake pipe; 3. Mixing box; 301. Box body; 302. Inlet hole; 303. Outlet groove; 304. Annular groove; 305. Liquid inlet hole; 4. Primary spray mechanism; 401. Rotating ring; 402. Connecting annular groove; 403. Nozzle 1; 5. Liquid supply mechanism; 501. Liquid pump; 502. Liquid pipe; 6. Drive rotating part; 601. Motor; 602. Rotating shaft; 603. Intermediate plate; 7. Secondary spray. Mechanism; 701, Arc-shaped frame; 702, Conductor frame; 703, Guide surface two; 704, Nozzle two; 8, Fixing frame; 9, Shock wave reaction mechanism; 901, Arc-shaped groove; 902, Elastic diaphragm; 903, Ventilation arc plate; 10, Self-cleaning part; 1001, Cleaning plate; 1002, Connecting rod; 11, Sealing end; 1101, Mounting frame; 1102, Sealing plug; 1103, Threaded column; 1104, Locking ring; 12, Guide surface one; 13, Slag discharge port; 14, Filtration mechanism; 1401, Filter screen; 1402, Scraper; 1403, Support rod. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 7As shown, this embodiment of the invention provides a dust suppression device for mining operations, including a mobile body 1. A suction ventilation assembly 2 is fixedly installed on the top of the mobile body 1. A mixing box 3 is connected to the top of the suction ventilation assembly 2. A primary spraying mechanism 4 is rotatably fitted inside the mixing box 3. A liquid supply mechanism 5 is provided on the outside of the mobile body 1. The liquid supply mechanism 5 is connected to the primary spraying mechanism 4. A secondary spraying mechanism 7 is connected to the top of the mixing box 3. The secondary spraying mechanism 7 sprays arc-shaped water mist toward the dust removal area. A shock wave reaction mechanism 9 is provided on the outer wall of the mixing box 3. The suction ventilation assembly 2 includes a ventilation duct 201, a reduction chamber 202, a fan 203, a main suction pipe 204, and an auxiliary suction pipe 205. One end of the auxiliary suction pipe 205 is connected to the reduction chamber 202, and the other end is toward the dust removal area.

[0031] The ventilation duct 201 is fixed to the top of the movable body 1, the reduction cavity 202 is opened inside the ventilation duct 201, the fan 203 is installed inside the reduction cavity 202, the main suction pipe 204 is connected to the bottom of the ventilation duct 201 and communicates with the reduction cavity 202, and the auxiliary suction pipe 205 is located above the main suction pipe 204, and the auxiliary suction pipe 205 and the main suction pipe 204 are aligned.

[0032] The ventilation duct 201 is used to directionally transport airflow. The reduction chamber 202 creates a Venturi effect in the reduction area, which creates a negative pressure inside the connected auxiliary suction pipe 205 and draws in dust from the air along the front end of the auxiliary suction pipe 205. The dust mixed with the air is then transported along the top of the reduction chamber 202 to the mixing box 3, where it mixes with the water mist sprayed out once to complete the initial dust suppression. This can be directed towards the mining dust generation area to achieve targeted initial dust suppression. The humidified dust is partially deposited and falls into the mixing box 3. The main suction pipe 204 works with the rotating fan 203 to achieve the intake of the main airflow.

[0033] The mixing box 3 includes a box body 301, an inlet hole 302, an outlet groove 303, an annular groove 304, and a liquid inlet hole 305. The box body 301 is fixed to the top of the ventilation duct 201. The inlet hole 302 is opened at the bottom of the box body 301 and communicates with the shrinkage chamber 202. The outlet groove 303 is opened at the top of the box body 301. The annular groove 304 is opened on the inner wall of the box body 301. The liquid inlet hole 305 is opened on the outer wall of the box body 301 and communicates with the annular groove 304.

[0034] The mixing chamber 3 sprays atomized liquid through a rotating jet inside, which, in conjunction with the airflow passing through it, achieves initial dust suppression by inhaling dust. On the other hand, it utilizes the mixing and shearing of the airflow and the sprayed atomized liquid to improve the uniformity of the mixing between the atomized liquid and the airflow, and to complete the shearing and refining of the sprayed atomized liquid. This improves the uniformity and refining effect of the sprayed atomized liquid during subsequent secondary spraying, thereby improving the coverage and dust adsorption effect of the dust removal area, thus enhancing the dust suppression effect and avoiding the poor dust collection effect caused by uneven dispersion of the atomized liquid when the airflow and the atomized liquid are mixed and blown apart in a single process.

[0035] The primary spraying mechanism 4 includes a rotating ring 401, a connecting ring groove 402, and a nozzle 403. The rotating ring 401 is rotatably sleeved in the ring groove 304. The connecting ring groove 402 is formed on the outer wall of the rotating ring 401. The nozzle 403 is fixedly connected to the inner wall of the rotating ring 401, and one end of the nozzle 403 is connected to the ring groove 304. The connecting ring groove 402 is connected to the liquid inlet 305. The liquid supply mechanism 5 includes a liquid pump 501 and a liquid pipe 502. The outlet end of the liquid pump 501 is connected to the liquid pipe 502, and the upper end of the liquid pipe 502 is connected to the liquid inlet 305.

[0036] The primary spraying mechanism 4 is used to complete the first atomized liquid spraying in the mixing box 3 and complete the initial dust adsorption treatment. The connecting annular groove 402 and the annular groove 304 are always kept in communication to ensure that the liquid introduced into it is always effectively sprayed out through the nozzle 403 during the rotation. The nozzles 403 are evenly distributed to provide a mixing and relative shearing effect during rotation. Liquid is input through the liquid inlet 305. The liquid pump 501 is connected to an external water source to draw in water and pump it out to provide pressurized water flow.

[0037] The mixing chamber 3 is equipped with a drive rotating part 6 at its top. The drive rotating part 6 controls the rotation of the primary spraying mechanism 4. The drive rotating part 6 includes a motor 601, a rotating shaft 602, and an intermediate plate 603. The motor 601 is fixed to the top of the mixing chamber 3 by a support base. One end of the rotating shaft 602 is fixedly connected to the output shaft of the motor 601, and the other end of the rotating shaft 602 passes through the top of the mixing chamber 3 and is fixedly connected to the intermediate plate 603. The intermediate plate 603 is fixedly connected to the inner wall of the rotating ring 401. The mixing chamber 3 is equipped with a filtering mechanism 14. The filtering mechanism 14 includes a filter screen 1401, a scraper 1402, and a support rod 1403. The filter screen 1401 is fixed in the outlet groove 303. The scraper 1402 slides against the bottom of the filter screen 1401. The support rod 1403 is fixed on the intermediate plate 603 and is fixedly connected to the scraper 1402.

[0038] The drive rotating part 6 provides rotational power. On one hand, it connects to and drives the rotating ring 401 to rotate through the intermediate plate 603. The intermediate plate 603 blocks the top of the inlet hole 302, realizing the deflection treatment after airflow is blocked, further improving the deflection disturbance of airflow in the mixing box 3 and improving the mixing effect. On the other hand, it provides rotational power to the self-cleaning part 10 to scrape the bottom of the inner cavity of the mixing box 3, avoiding the adhesion of deposited dust and facilitating subsequent cleaning. The drive rotating part 6 drives the scraper 1402 to rotate, scraping the bottom of the filter screen 1401 to avoid clogging. The filter screen 1401 completes dust filtration in one dust suppression, preventing subsequent clogging.

[0039] The secondary spraying mechanism 7 includes an arc-shaped frame 701, a guide frame 702, a second guide surface 703, and a second nozzle 704. The guide frame 702 is fixedly connected to the bottom of the arc-shaped frame 701. The second guide surface 703 is opened on the arc-shaped frame 701. The second nozzle 704 is evenly distributed on the arc-shaped frame 701 and communicates with the inside of the arc-shaped frame 701. The top of the mixing box 3 is fixedly connected to a fixed frame 8, which is connected to the outlet groove 303. The guide frame 702 is detachably sleeved in the fixed frame 8.

[0040] The secondary spraying mechanism 7 is used to spray atomized liquid a second time. The arc-shaped frame 701, together with the guide surface 703, achieves the upward spraying of atomized liquid. Combined with the orientation and arc-shaped layout, the sprayed atomized liquid is directed towards the dust suppression area to fully cover and spatially isolate it. This effectively completes the dust suppression treatment while preventing dust diffusion during the mining process, suppressing the diffusion area, and improving the dust suppression effect.

[0041] The shock wave reaction mechanism 9 includes an arc groove 901, an elastic diaphragm 902, and a ventilating arc plate 903. The arc groove 901 is opened on the outer surface of the housing 301 and faces the same direction as the auxiliary suction pipe 205. The elastic diaphragm 902 and the ventilating arc plate 903 are both fixed in the arc groove 901. The elastic diaphragm 902 is located on the outside. The ventilating arc plate 903 is provided with a through hole. A buffer cavity is provided between the ventilating arc plate 903 and the elastic diaphragm 902.

[0042] An elastic arc-shaped diaphragm 902 covers the outer opening of the arc-shaped groove 901. The ventilation arc plate 903 is a rigid arc-shaped plate made of metal or composite material, with several pulsating through holes (diameter 1.0-3.0 mm) evenly opened on its body. The pulsating through holes penetrate the inner cavity of the mixing box 3. When the blast shock wave propagates to the arc-shaped groove 901, the elastic arc-shaped diaphragm 902 generates elastic vibration under the action of instantaneous pressure difference, which drives the gas in the buffer cavity 904 to undergo periodic compression and rebound. The pressure in the cavity is periodically transmitted into the interior of the mixing box 3 through the pulsating through holes, thereby forming transient air pressure pulsation in the mixing box 3. This pulsation forms a time-varying shear effect on the flowing gas in the mixing box 3 and the atomized liquid sprayed out at the first time, inducing secondary breakage of the droplets and turbulence enhancement, so that the droplet particle size sprayed during the blast period is reduced and the distribution is uniform, and the dust collection efficiency is significantly improved.

[0043] The depth of the buffer chamber is preferably 5–15 mm, the thickness of the elastic arc-shaped diaphragm 902 is 0.8–1.5 mm, the thickness of the ventilation arc plate 903 is 1.0–2.0 mm, and the total opening area accounts for less than 1% of the cross-sectional area inside the mixing chamber. This ensures sufficient transfer of impact energy without affecting the continuity and dustproof performance of the main intake channel.

[0044] The bottom of the inner cavity of the box 301 is provided with a guide surface 12. A self-cleaning part 10, fixed to the bottom of the intermediate plate 603, is provided inside the box 301. The self-cleaning part 10 includes a cleaning plate 1001 and a connecting rod 1002. The cleaning plate 1001 is adapted to the guide surface 12. One end of the connecting rod 1002 is fixedly connected to the cleaning plate 1001, and the other end of the connecting rod 1002 is fixed to the bottom of the intermediate plate 603. A slag discharge port 13 is provided on the side of the mixing box 3. The slag discharge port 13 is provided with a sealing end 11. The sealing end 11 includes a mounting frame 1101, a sealing plug 1102, a threaded post 1103, and a locking ring 1104. The mounting frame 1101 is fixed on the outer wall of the mixing box 3 and communicates with the slag discharge port 13. The sealing plug 1102 is movably sleeved in the mounting frame 1101. The threaded post 1103 is fixed on the mounting frame 1101 and movably sleeved with the sealing plug 1102. The locking ring 1104 is threadedly sleeved on the threaded post 1103.

[0045] By using the drive rotating part 6 to drive the self-cleaning part 10 to rotate, the dust is scraped along the surface of the guide surface 12, avoiding the adhesion of settled dust. After opening the sealing end 11, the scraped dust is quickly discharged through the slag discharge port 13 through the centrifugal force of rotation, and the dust is automatically processed after the initial dust reduction. The guide surface 12 is an arc surface that is high in the middle and lowers to the outside, which facilitates the accumulation of dust and improves the slag discharge effect.

[0046] Working principle and usage process of this invention:

[0047] Equipment placement and startup

[0048] The operator moves the device to the dust-generating area (dust removal area) of the mine using the mobile main body 1, and directs the auxiliary suction pipe 205 of the suction ventilation component 2 and the secondary spraying mechanism 7 toward the dust source. The equipment is then started, and the fan 203, the liquid pump 501 of the liquid supply mechanism 5 and the motor 601 of the drive rotating part 6 begin to work.

[0049] Active vacuuming

[0050] When the fan 203 is running, it draws in the main air volume through the main suction pipe 204. At the same time, the airflow flows at high speed through the reduction chamber 202 inside the ventilation duct 201, generating the Venturi tube effect, which creates a negative pressure inside the auxiliary suction pipe 205 connected to the reduction chamber 202, thereby actively drawing in the high concentration of dust and air generated in the dust removal area (such as the mining point).

[0051] One-time mixing and shear atomization

[0052] The dust-laden airflow is drawn in and enters the mixing chamber 3 through the inlet 302. At the same time, the motor 601 drives the rotating shaft 602 and the intermediate plate 603 to rotate, which in turn drives the rotating ring 401 of the primary spraying mechanism 4 to rotate. The liquid pump 501 of the liquid supply mechanism 5 pressurizes water (or dust suppressant) through the liquid pipe 502 into the inlet 305, the ring groove 304 and the connecting ring groove 402, and finally sprays it out from the rotating nozzle 403, forming a rotating water mist inside the mixing chamber 3. The high-speed dust-laden airflow and the rotating primary water mist are fully mixed and collided in the mixing chamber 3 to achieve preliminary dust suppression. Some dust settles, and some dust is filtered at the bottom of the filter mechanism 14. The high-speed airflow generates a strong shearing effect on the primary sprayed water mist, which further refines the water mist and dust and mixes it more evenly with the airflow and dust.

[0053] Secondary spraying and coverage

[0054] The mixture of airflow, dust, and fine mist droplets after initial mixing and shearing is filtered through the outlet 303 at the top of the mixing box 3 and the filter mechanism 14. After filtration, the mixture enters the secondary spraying mechanism 7 through the fixed frame 8. The mixture is distributed into the arc-shaped frame 701 and finally sprayed into the dust removal area as arc-shaped water mist by the equally spaced nozzles 704 and guide surfaces 703. The fine mist droplets, after being fully atomized and mixed, efficiently capture suspended dust in the air and form a mist curtain in the mining area, effectively covering and isolating dust and inhibiting its diffusion.

[0055] Adaptive Enhancement of Explosive Shock Wave

[0056] When mining blasting operations are carried out, the shock wave generated by the blast propagates to this device. The energy of the shock wave acts on the elastic diaphragm 902 of the shock wave reaction mechanism 9 facing the blasting area. After being subjected to the energy of the shock wave, the elastic diaphragm 902 vibrates violently for a moment. This vibration affects the pressure inside the mixing box 3, causing strong turbulence and pulsation in the internal airflow. This instantaneous strong turbulence greatly enhances the mixing and shearing intensity of the airflow on the primary sprayed atomized liquid, thereby greatly improving the fineness and uniformity of the atomized liquid in an instant. This makes the secondary sprayed atomized liquid (at the moment when the blasting dust concentration is the highest) have the strongest adsorption and dust suppression capabilities, realizing adaptive and efficient instantaneous dust suppression treatment of massive amounts of blasting dust.

[0057] Self-cleaning and sludge removal

[0058] During equipment operation, the drive rotating part 6 continuously drives the intermediate plate 603 to rotate, and the self-cleaning part 10 fixed at the bottom of the intermediate plate 603 also rotates accordingly. The cleaning plate 1001 of the self-cleaning part 10 continuously scrapes the guide surface 12 at the bottom of the mixing box 3 to prevent the captured dust (sludge) from sticking and depositing at the bottom. At the same time, the intermediate plate 603 drives the scraper 1402 in the filter mechanism 14 on it to rotate and scrape along the bottom of the filter screen 1401 to avoid clogging. When cleaning is required, the sealing end 11 on the slag discharge port 13 on the side of the mixing box 3 is opened. Using the centrifugal force of the rotation of the cleaning plate 1001, the scraped deposited dust is quickly discharged through the slag discharge port 13, completing the automated slag cleaning process, and the equipment can continue to be put into use.

Claims

1. A dust suppression device for mining operations, comprising a mobile main body (1), characterized in that: The top of the mobile body (1) is fixedly equipped with an intake ventilation assembly (2), and the top of the intake ventilation assembly (2) is connected to a mixing box (3). The mixing box (3) is rotatably fitted with a primary spraying mechanism (4). The outside of the mobile body (1) is provided with a liquid supply mechanism (5), which is connected to the primary spraying mechanism (4). The top of the mixing box (3) is connected to a secondary spraying mechanism (7), which sprays arc-shaped water mist toward the dust removal area. The outer wall of the mixing box (3) is provided with a shock wave reaction mechanism (9). The intake ventilation assembly (2) includes a ventilation duct (201), a reduction chamber (202), a fan (203), a main intake pipe (204), and an auxiliary intake pipe (205). One end of the auxiliary intake pipe (205) is connected to the reduction chamber (202), and the other end faces the dust removal area.

2. The dust suppression device for mining operations according to claim 1, characterized in that: The ventilation duct (201) is fixed to the top of the moving body (1), the reduction cavity (202) is opened inside the ventilation duct (201), the fan (203) is installed inside the reduction cavity (202), the main suction pipe (204) is connected to the bottom of the outside of the ventilation duct (201) and communicates with the reduction cavity (202), the auxiliary suction pipe (205) is located above the main suction pipe (204), and the auxiliary suction pipe (205) and the main suction pipe (204) are aligned.

3. The dust suppression device for mining operations according to claim 2, characterized in that: The mixing tank (3) includes a tank body (301), an inlet hole (302), an outlet groove (303), an annular groove (304), and a liquid inlet hole (305). The tank body (301) is fixed to the top of the ventilation cylinder (201). The inlet hole (302) is opened at the bottom of the tank body (301) and communicates with the shrinkage cavity (202). The outlet groove (303) is opened at the top of the tank body (301). The annular groove (304) is opened on the inner wall of the tank body (301). The liquid inlet hole (305) is opened on the outer wall of the tank body (301) and communicates with the annular groove (304).

4. The dust suppression device for mining operations according to claim 3, characterized in that: The primary spraying mechanism (4) includes a rotating ring (401), a connecting ring groove (402), and a nozzle (403). The rotating ring (401) is rotatably sleeved in the ring groove (304). The connecting ring groove (402) is opened on the outer wall of the rotating ring (401). The nozzle (403) is fixedly connected to the inner wall of the rotating ring (401), and one end of the nozzle (403) is connected to the ring groove (304). The connecting ring groove (402) is connected to the liquid inlet (305).

5. The dust suppression device for mining operations according to claim 4, characterized in that: The liquid supply mechanism (5) includes a liquid pump (501) and a liquid pipe (502). The liquid outlet of the liquid pump (501) is connected to the liquid pipe (502), and the upper end of the liquid pipe (502) is connected to the liquid inlet (305).

6. The dust suppression device for mining operations according to claim 5, characterized in that: The top of the mixing tank (3) is fixedly provided with a drive rotating part (6), which controls the rotation of the primary spraying mechanism (4). The drive rotating part (6) includes a motor (601), a rotating shaft (602), and an intermediate plate (603). The motor (601) is fixed to the top of the mixing tank (3) by a support base. One end of the rotating shaft (602) is fixedly connected to the output shaft of the motor (601), and the other end of the rotating shaft (602) passes through the top of the mixing tank (3) and is fixedly connected to the intermediate plate (603). The intermediate plate (603) is fixedly connected to the inner wall of the rotating ring (401). The mixing box (3) is provided with a filtering mechanism (14). The filtering mechanism (14) includes a filter screen (1401), a scraper (1402) and a support rod (1403). The filter screen (1401) is fixed in the through groove (303). The scraper (1402) slides against the bottom of the filter screen (1401). The support rod (1403) is fixed on the intermediate plate (603) and fixedly connected to the scraper (1402).

7. The dust suppression device for mining operations according to claim 4, characterized in that: The secondary ejection mechanism (7) includes an arc frame (701), a guide frame (702), a second guide surface (703), and a second nozzle (704). The guide frame (702) is fixedly connected to the bottom of the arc frame (701). The second guide surface (703) is opened on the arc frame (701). The second nozzle (704) is evenly distributed on the arc frame (701) and communicates with the inside of the arc frame (701). The top of the mixing box (3) is fixedly connected to a fixed frame (8). The fixed frame (8) is connected to the outlet groove (303). The guide frame (702) is detachably sleeved in the fixed frame (8).

8. The dust suppression device for mining operations according to claim 4, characterized in that: The shock wave reaction mechanism (9) includes an arc groove (901), an elastic diaphragm (902), and a ventilation arc plate (903). The arc groove (901) is opened on the outer surface of the housing (301) and faces the same direction as the auxiliary suction pipe (205). The elastic diaphragm (902) and the ventilation arc plate (903) are both fixed in the arc groove (901). The elastic diaphragm (902) is located on the outside. The ventilation arc plate (903) is provided with a through hole. A buffer cavity is provided between the ventilation arc plate (903) and the elastic diaphragm (902).

9. The dust suppression device for mining operations according to claim 4, characterized in that: The bottom of the inner cavity of the box (301) is provided with a guide surface (12). The box (301) is provided with a self-cleaning part (10) fixed to the bottom of the middle plate (603). The self-cleaning part (10) includes a cleaning plate (1001) and a connecting rod (1002). The cleaning plate (1001) is adapted to the guide surface (12). One end of the connecting rod (1002) is fixedly connected to the cleaning plate (1001), and the other end of the connecting rod (1002) is fixed to the bottom of the middle plate (603).

10. The dust suppression device for mining operations according to claim 9, characterized in that: The mixing box (3) has a slag discharge port (13) on its side. The slag discharge port (13) is provided with a sealing end (11). The sealing end (11) includes a mounting frame (1101), a sealing plug (1102), a threaded post (1103), and a locking ring (1104). The mounting frame (1101) is fixed on the outer wall of the mixing box (3) and communicates with the slag discharge port (13). The sealing plug (1102) is movably sleeved in the mounting frame (1101). The threaded post (1103) is fixed on the mounting frame (1101) and movably sleeved with the sealing plug (1102). The locking ring (1104) is threadedly sleeved on the threaded post (1103).

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