Cyclone filtering type mining pneumatic dust removal fan device
By combining a cyclone filtration structure and a silencing mechanism, the problem of poor wet dust removal effect of mining pneumatic dust collectors is solved, achieving efficient dust removal and noise reduction, ensuring stable equipment operation and improved working environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUANGHONG (WENZHOU) ENTERPRISE MANAGEMENT CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-05-19
AI Technical Summary
Existing pneumatic dust collectors for mining are not effective at handling wet dust, their filters are prone to clogging, their dust removal efficiency is low, and they generate a lot of noise, which affects the working environment and the stable operation of equipment.
It adopts a cyclone filtration structure, which uses filter balls to initially filter dry dust, and the fan wheel generates centrifugal force to separate wet dust, which is then condensed into water droplets through the annular inner cavity and discharged. Combined with a silencing mechanism, it reduces noise and improves dust removal efficiency and equipment stability.
It achieves efficient separation and removal of wet dust, improves dust removal efficiency, reduces noise pollution, ensures long-term stable operation of the equipment, and meets occupational health and safety requirements.
Smart Images
Figure CN224252452U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fan equipment technology, specifically a cyclone filter type mine pneumatic dust removal fan device. Background Technology
[0002] During mining, tunnel construction, and other underground engineering operations, rock crushing and material transportation generate large amounts of dust. This dust not only harms the respiratory health of workers, potentially leading to occupational diseases such as pneumoconiosis with prolonged exposure, but also affects the working efficiency of machinery and equipment, and may even cause major safety accidents such as explosions due to dust accumulation. Especially in high-humidity environments, dust easily absorbs moisture to form wet dust, which has a larger particle mass and stronger adhesion, making it difficult for traditional dust removal technologies to remove efficiently, thus deteriorating the working environment.
[0003] Currently, pneumatic dust collectors for mining are crucial equipment for improving the working environment. They typically employ negative pressure suction or positive pressure air delivery to draw in dust-laden air, filter it through a dust collection device, and then discharge it. However, most existing dust collectors only have a simple dust collection box or filter at the outlet, resulting in low dust collection efficiency, especially for wet dust. Wet dust particles, due to their moisture content, easily adhere to the filter, causing blockage, which not only reduces dust collection efficiency but also increases maintenance costs. Furthermore, traditional dust collectors are quite noisy, causing noise pollution to workers during long-term operation. Utility Model Content
[0004] The purpose of this utility model is to overcome the defects of the prior art by providing a cyclone filter-type pneumatic dust removal fan device for mining, which solves the problem of low dust removal efficiency.
[0005] The technical solution of this utility model includes a dust removal fan body and an air outlet duct. A dust collector is installed inside the air outlet duct. The dust collector includes, along the airflow direction, the following sections: a front section filled with filter balls, with a branch outlet on the front section pipe wall, the opening area of which is covered by the filter balls; a middle section with a dust collection box installed inside, the inner diameter of the middle section pipe being larger than the outer diameter of the dust collection box to form an annular inner cavity between the inner wall of the pipe and the outer periphery of the dust collection box; a sewage discharge chamber connected to the annular inner cavity at the bottom of the middle section pipe, the sewage discharge chamber having a sewage discharge port leading to the outside of the device; and a fan wheel installed at the front end of the dust collection box, the fan wheel being coaxially mounted on the central axis of the pipe at the air inlet of the dust collection box, the fan wheel rotating under the action of airflow.
[0006] By adopting the above technical solution, the branch outlet allows some airflow carrying dust to be discharged from the branch. The filter balls can perform preliminary filtration of dust-laden air, intercepting dry dust particles, relieving pressure in the main channel and assisting in filtration. When the dust-laden air enters the middle section of the pipe, it drives the fan wheel to rotate at high speed. Utilizing the centrifugal force generated by the fan wheel rotation, the internal air forms a cyclone, throwing heavier wet dust particles towards the inner wall of the annular cavity. Furthermore, the annular cavity, in conjunction with the sewage discharge chamber, promotes the collection and condensation of wet dust mist into water droplets for discharge, enhancing the separation and removal capabilities of wet dust. Compared with traditional dust removal methods, it can more effectively handle wet dust and improve dust removal quality. Thus, by intercepting dry dust with the front-end filter balls and focusing on wet dust in the middle section, it avoids wet dust clogging the front-end filter material, achieving efficient removal of wet dust. Moreover, the staged treatment of dry and wet dust improves the overall dust removal efficiency and ensures the long-term stable operation of the equipment.
[0007] In one possible design, the branch outlet at the front end is covered with a mesh grille, with filter balls filling the inside of the grille and completely obscuring the branch outlet.
[0008] With the above design, the mesh grille can support and limit the filter balls, preventing them from being blown out of the branch outlets, while ensuring that dusty air can pass smoothly through the grille and come into contact with the filter balls, thus achieving a stable and continuous filtration function and ensuring the reliability and effectiveness of the filtration structure.
[0009] In one possible design, the outer edge of the mesh grid is fixed with lugs, and bolts are screwed onto the lugs. When the bolts are tightened, they abut against the inner wall of the branch outlet and can selectively abut against the inner wall of the branch outlet at different height positions.
[0010] The above design allows for flexible adjustment of the grid's installation height according to actual usage needs, thereby adjusting the density of the filter ball packing and the filtration effect. It also facilitates the disassembly and replacement of the filter balls, making equipment maintenance and repair easier and improving the flexibility and convenience of the device.
[0011] In one possible design, the dust collector also includes a rear section, which contains a noise reduction mechanism.
[0012] By adopting the above design, the silencing mechanism can effectively reduce the noise generated during the operation of the dust removal fan, reduce noise pollution to operators, improve the working environment, meet occupational health and safety requirements, and make the equipment operation more environmentally friendly and humane.
[0013] In one possible design, the silencing mechanism includes multiple radially arranged baffles, which are spaced apart at the outlet position of the rear section. The baffles include an inflow section, an outflow section, and a guide section in sequence along the airflow direction. The inflow section and the outflow section are inclined to the central axis of the pipe in different directions, and the guide section is arranged parallel to the central axis of the pipe.
[0014] By adopting the above design, the special shape of the folded plate causes the airflow to change direction multiple times during the flow process, increasing the contact area and contact time between the airflow and the folded plate. Finally, the setting of the guide section guides the airflow in each interval to flow out in parallel, which has a certain effect of stabilizing the flow. In this way, by utilizing the friction and collision between the airflow and the folded plate, as well as the reflection and refraction of sound waves, sound energy is effectively consumed, achieving efficient noise reduction and further reducing the operating noise of the dust removal fan.
[0015] In one possible design, the rear section of the pipe wall is also filled with sound-absorbing cotton.
[0016] With the above design, the sound insulation cotton has good sound absorption and sound insulation properties, which can absorb and block the noise generated by the dust removal fan during operation. It works in conjunction with the silencing mechanism to further enhance the silencing effect. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This utility model Figure 1 A magnified view of a section at point A in the middle;
[0019] Figure 3 This is a schematic diagram of the structure of the folding plate of this utility model;
[0020] The components include: 1. Dust collector fan body; 2. Air outlet duct; 3. Dust collector; 4. Front section; 41. Filter ball; 42. Branch outlet; 43. Mesh grille; 431. Ear block; 432. Bolt; 5. Middle section; 51. Dust collection box; 52. Annular inner cavity; 53. Sewage discharge chamber; 54. Sewage discharge port; 55. Fan wheel; 6. Rear section; 61. Baffle plate; 611. Inflow section; 612. Outflow section; 613. Guide section; 62. Sound insulation cotton. Detailed Implementation
[0021] like Figure 1 The cyclone filter-type mine pneumatic dust collector shown mainly consists of a dust collector fan body 1 and an outlet duct 2. The dust collector 3 is installed sequentially in the outlet duct 2 along the airflow direction, comprising a front section 4, a middle section 5, and a rear section 6. The dust collector fan body 1 uses an existing mine pneumatic fan, employing negative pressure suction or positive pressure delivery to draw in dust-laden air from underground engineering environments such as mines and tunnels and deliver it into the outlet duct 2.
[0022] The front section 4 of the dust collector 3 is a tubular structure, filled with filter balls 41. The filter balls 41 can be porous sponge balls or fiber balls with adsorption properties, which can effectively intercept dry dust particles in dusty air. A branch outlet 42 is opened on the wall of the front section 4, and the opening area of the branch outlet 42 is completely covered by the filter balls 41.
[0023] A dust collector 51 is installed inside the middle section 5, with an outer diameter smaller than the inner diameter of the middle section 5 duct, thus forming an annular inner cavity 52 between the inner wall of the duct and the outer periphery of the dust collector 51. At the front end of the air inlet of the dust collector 51, a fan wheel 55 is coaxially mounted. The central axis of the fan wheel 55 is fixed to the central axis of the duct via bearings, ensuring free rotation of the fan wheel 55. The fan wheel 55 is made of high-strength material, with spirally distributed blades that effectively utilize the airflow dynamics of dust-laden air to turbulent the air into a cyclone. A sludge discharge chamber 53 is located at the bottom of the middle section 5 duct. The upper opening of the sludge discharge chamber 53 communicates with the annular inner cavity 52, and the lower end has a sludge discharge port 54 leading to the outside of the device. A valve is installed at the sludge discharge port 54 to control the discharge time and volume. The dust collector 51 has a cylindrical structure and contains filter media, filter screens, and other filtration components. When dusty air enters the middle section 5 pipe, the fan wheel 55 rotates at high speed. Under the action of centrifugal force, the heavier wet dust particles are thrown towards the inner wall of the annular inner cavity 52. The wet dust mist gathers on the inner wall and eventually condenses into water droplets. Under the action of gravity, the water droplets slide down the inner wall to the sewage discharge chamber 53 and are discharged from the sewage discharge port 54.
[0024] like Figure 1 , Figure 3 As shown, the rear section 6 is also a tubular structure with an internal silencing mechanism. This mechanism comprises six to twelve radially arranged baffles 61 of varying lengths, spaced at intervals at the outlet of the rear section 6. Each baffle 61, along the airflow direction, includes an inflow section 611, an outflow section 612, and a guide section 613. The inflow section 611 and the outflow section 612 are inclined at angles of 30° to 45° in different directions relative to the pipe's central axis. For example, the inflow section 611 is inclined at 45° on one side, and the outflow section 612 extends from the rear end of the inflow section 611 and bends at a 90° angle on the other side. The guide section 613 is parallel to the pipe's central axis. The baffles 61 are made of metal, with both ends fixed within a frame. The frame is fixedly installed inside the rear section of the pipe, and the sound-absorbing cotton 62 described below is fixed between the frame and the pipe wall. The inflow section 611, outflow section 612, and guide section 613 of the baffle plate 61 form a stepped airflow path, which consumes sound energy by changing the airflow direction multiple times, avoiding the problem of increased wind resistance in traditional silencers. The baffle plate 61 is directly installed at the end of the dusty airflow, specifically reducing the noise of high-speed airflow emissions, especially the rotation of the fan wheel 55 and the whistling of the airflow.
[0025] The inner wall of the rear section 6 is filled with sound-absorbing cotton 62. The sound-absorbing cotton 62 is made of polyester fiber, which has good sound absorption and sound insulation properties. The sound-absorbing cotton 62 is tightly filled in the gap between the pipe wall and the baffle plate 61. Working together with the baffle plate 61 to form a sound-absorbing mechanism, the sound energy is effectively consumed and the noise generated during the operation of the dust collector fan is reduced through the friction and collision between the airflow and the baffle plate 61, as well as the reflection, refraction and absorption of sound waves in the sound-absorbing cotton 62.
[0026] like Figure 1 , Figure 2 As shown, to prevent the filter balls 41 from being blown out of the branch outlet 42, a mesh grille 43 is installed at the branch outlet 42 in the front section 4. The mesh grille 43 is made of metal, and its mesh size is adapted to the size of the filter balls 41 to ensure that dusty air can pass through the grille smoothly and come into contact with the filter balls 41. Since wet dust will fall and accumulate at the bottom of the front section 4, a drain outlet 54 is also provided at the bottom of the front section 4.
[0027] like Figure 2 As shown, four ear blocks 431 are fixed to the outer edge of the mesh grille 43, evenly distributed along the edge of the grille. Each ear block 431 has a through hole, through which a bolt 432 passes and is screwed into a pre-drilled threaded hole on the inner wall of the branch outlet 42. When it is necessary to adjust the packing tightness of the filter balls 41, loosen the bolt 432, move the grille up and down along the inner wall of the branch outlet 42 to a suitable height, and then tighten the bolt 432 to press it against the inner wall of the branch outlet 42. This allows the grille to be fixed at different heights, facilitating adjustment of the filtration effect according to the actual dust concentration. It also facilitates disassembly of the grille to replace the filter balls 41 and allows cleaning of the pipe from the branch outlet 42.
[0028] The fan wheel 55 is coaxially positioned at the front end of the air inlet of the dust collector 51, ensuring that the airflow impacts the blades of the fan wheel 55 perpendicularly, maximizing the use of airflow kinetic energy to drive rotation and improving centrifugal separation efficiency. The fan wheel 55 is entirely driven by airflow, requiring no additional motor or energy source. Of course, a fan can also be used to drive the fan wheel 55, which meets the explosion-proof requirements for mining pneumatic equipment.
[0029] The working process of this device is as follows: After the dust collector fan body 1 starts, it draws dust-laden air from the working environment into the outlet duct 2. The dust-laden air first enters the front section 4 of the dust collector 3. When passing through the area filled with filter balls 41, dry dust particles are intercepted by the filter balls 41, and part of the dust-laden airflow is discharged from the branch outlet 42, relieving the pressure in the main channel. Subsequently, the dust-laden air enters the middle section 5, where the wet dust is separated into the inner wall of the annular inner cavity 52 by the centrifugal force generated by the rotation of the fan wheel 55. After condensing into water droplets, it is discharged through the drain chamber 53. Then, the airflow enters the dust collection box 51 for further filtration and dust removal. Finally, the dust-removed air enters the rear section 6, where the noise of the airflow is reduced by the combined action of the silencing mechanism and the sound insulation cotton 62 before being discharged from the device, achieving the dual effect of efficient dust removal and noise control.
Claims
1. A cyclone filter-type pneumatic dust removal fan device for mining, comprising a dust removal fan body (1) and an air outlet duct (2), characterized in that: A dust collector (3) is installed inside the air outlet duct (2), and the dust collector (3) includes, in sequence along the airflow direction: The front section (4) is filled with filter balls (41), and a branch outlet (42) is opened on the pipe wall of the front section (4). The opening area of the branch outlet (42) is covered by the filter balls (41). The middle section (5) is equipped with a dust collector (51), and the inner diameter of the pipe in the middle section (5) is larger than the outer diameter of the dust collector (51) to form an annular inner cavity (52) between the inner wall of the pipe and the outer periphery of the dust collector (51); the bottom of the middle section (5) is provided with a sewage discharge chamber (53) that communicates with the annular inner cavity (52), and the sewage discharge chamber (53) is provided with a sewage discharge port (54) leading to the outside of the device; a fan wheel (55) is provided at the front end of the dust collector (51), and the fan wheel (55) is coaxially installed on the central axis of the pipe at the air inlet of the dust collector (51), and the fan wheel (55) rotates under the action of airflow.
2. The cyclone filter-type mine pneumatic dust removal fan device according to claim 1, characterized in that: The branch outlet (42) of the front section (4) is covered with a mesh grille (43), and the filter ball (41) fills the inside of the grille and completely covers the branch outlet (42).
3. The cyclone filter-type mine pneumatic dust removal fan device according to claim 2, characterized in that: The outer edge of the mesh grid (43) is fixed with an ear block (431), and a bolt (432) is screwed onto the ear block (431). When the bolt (432) is tightened, it abuts against the inner wall of the branch outlet (42) and can selectively abut against the inner wall of the branch outlet (42) at different height positions.
4. The cyclone filter-type pneumatic dust collector for mining as described in claim 1 or 3, characterized in that: The dust collector (3) also includes a rear section (6), which is equipped with a noise reduction mechanism.
5. The cyclone filter-type mine pneumatic dust removal fan device according to claim 4, characterized in that: The silencing mechanism includes multiple radially arranged baffles (61), which are spaced apart at the outlet of the rear section (6). The baffles (61) include an inflow section (611), an outflow section (612), and a guide section (613) in sequence along the airflow direction. The inflow section (611) and the outflow section (612) are inclined to the central axis of the pipe in different directions, and the guide section (613) is arranged parallel to the central axis of the pipe.
6. The cyclone filter-type mine pneumatic dust removal fan device according to claim 4, characterized in that: The pipe wall of the rear section (6) is also filled with sound insulation cotton (62).