Mining pneumatic dust removal fan

Abstract

The utility model discloses a mining pneumatic dust removal fan, relates to the technical field of fans, and solves the problems of low dust removal efficiency and poor dust removal effect in a mine environment. Comprising a motor, a flow guide fan wheel, a pipeline and an isolation inner pipe, the inner sleeve of the isolation inner pipe is fixed in the pipeline, the inner diameter of the pipeline is larger than that of the isolation inner pipe, an annular cavity is formed between the pipe wall and the isolation inner pipe, the isolation inner pipe is located at the position close to the outlet relative to the motor, and a drain outlet is formed in the annular cavity. Under the action of centrifugal force generated by high-speed rotation of the flow guide fan wheel, heavy wet dust particles are thrown to the inner wall of the annular concave cavity located on the periphery, and wet dust mist in the annular concave cavity is gathered, finally condensed into water drops and discharged from the sewage draining exit, so that wet dust in air is effectively removed, dust removal operation is achieved, the centrifugal force is fully utilized, and the dust removal efficiency is improved. And air containing wet dust is effectively separated from clean air, so that the dust removal efficiency and the dust removal effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a pneumatic dust removal fan for mining. Background Technology

[0002] In mining, tunnel construction, and other underground engineering projects, activities such as rock crushing and material handling generate large amounts of dust. This dust not only poses a serious threat to workers' health but can also affect the normal operation of machinery and equipment, and even cause safety accidents such as explosions. Especially in the high-humidity underground environment, dust in the air easily absorbs moisture to form wet dust, which is more difficult to remove effectively using traditional dry dust collection equipment.

[0003] Existing dust removal technologies used in underground working environments such as mines mainly fall into two categories: dry dust removal and wet dust removal. Dry dust removal methods, such as bag filters and electrostatic precipitators, are highly effective in handling dry dust, but their ability to handle wet dust is limited. This is because wet dust easily adheres to the filter material, leading to decreased filtration efficiency and difficulty in cleaning, resulting in poor dust removal efficiency and effectiveness. Summary of the Invention

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a pneumatic dust removal fan for mining, which solves the problems of low dust removal efficiency and poor dust removal effect in the mining environment.

[0005] The technical solution of this utility model includes a motor, a guide fan wheel, a pipe, and an isolation inner tube. The pipe has an inlet, an outlet, and an inner wall. The guide fan wheel is connected to the output shaft of the motor. The motor is fixedly installed inside the pipe and is located near the inlet of the pipe. Under the action of the motor, the airflow enters from the inlet of the pipe and blows towards the outlet. The isolation inner tube is fixed inside the pipe. The inner diameter of the pipe is larger than that of the isolation inner tube. An annular cavity is formed between the pipe wall and the isolation inner tube. The isolation inner tube is located near the outlet relative to the motor. A drain port is opened in the annular cavity.

[0006] Using the above technical solution, the motor drives the guide fan wheel to draw in ambient air. The powerful airflow generated creates a cyclone diffusion effect. When the dust-laden air enters the pipe, under the centrifugal force generated by the high-speed rotation of the guide fan wheel, the heavier wet dust particles are thrown against the inner wall of the annular cavity located on the periphery. The wet dust mist in the annular cavity gathers and eventually condenses into water droplets and is discharged from the drain outlet, thereby effectively removing wet dust from the air and achieving dust removal. This method makes full use of centrifugal force to effectively separate air containing wet dust from clean air, thereby improving dust removal efficiency and effect. This utility model uses the principle of physical separation for dust removal, avoiding the clogging problem caused by direct contact filtration, reducing maintenance frequency, and lowering long-term operating costs. Compared with some large and complex dust removal systems, this utility model has a simpler and more compact structure, occupies less space, and is easy to deploy and install in mines with limited space.

[0007] In one possible design, the front end of the isolation inner tube forms an inlet for entering the annular cavity between the guide fan wheel and the inner end of the isolation tube.

[0008] With the above design, when dusty air enters through the pipe inlet, the heavier wet dust particles are effectively thrown towards the inner wall of the annular cavity under the strong centrifugal force generated by the high-speed rotation of the guide fan wheel. Since the inlet of the annular cavity is formed between the front end of the isolation inner tube and the guide fan wheel, the thrown wet dust can enter the annular cavity more smoothly, further improving the centrifugal separation effect.

[0009] In one possible design, the drain outlet is located in the axial direction of the annular cavity and away from the inlet, with the drain outlet on the bottom side in the direction of pipe gravity.

[0010] With the above design, since the wet dust particles are relatively heavy, they are thrown against the inner wall of the annular cavity under the action of centrifugal force and slide down along the inner wall. Once the wet dust enters the annular cavity, it naturally sinks to the drain outlet by gravity. By setting the drain outlet on the bottom side in the direction of gravity, gravity can be used to help the wet dust slide down to the drain outlet naturally, thereby improving the collection efficiency of wet dust, reducing the possibility of wet dust being sucked into the airflow again, and thus reducing the risk of secondary dust.

[0011] In one possible design, the guide fan wheel includes a hub and several fan plates that extend integrally outward from the outer periphery of the hub. The fan plates are inclined relative to the axial direction of the hub. A fan ring is integrally fixed to the outer periphery of the fan plate, and the fan ring is fixedly connected to each fan plate.

[0012] With the above design, the inclined fan plate helps to guide the airflow more evenly into the annular cavity, making the distribution of water mist and dust particles in the annular cavity more uniform. At the same time, the high-speed rotating airflow generated by the guide fan wheel enhances the centrifugal force, making it easier for water mist and dust particles to be thrown onto the inner wall of the annular cavity, which helps to improve the separation efficiency.

[0013] In one possible design, a spray system is installed at the inlet, the spray system having several spray nozzles arranged around the pipe wall.

[0014] The above design allows for the pre-wetting of dust particles in the air before they enter the duct. The wetted dust particles are more likely to accumulate in the annular cavity and form larger water droplets, making them easier to separate by subsequent centrifugal force. This is particularly effective for handling very fine or lightweight dust and is also suitable for some dry dust working environments.

[0015] In one possible design, the motor is fixedly connected to the pipe wall via a fixed frame. The fixed frame includes a frame cylinder and several support plates arranged around the periphery of the frame cylinder. The motor is installed inside the frame cylinder, and the support plates are welded and fixed to the pipe wall.

[0016] With the above design, the mounting bracket is fixed to the pipe wall by welding the support plate, which provides strong mechanical support and ensures that the motor will not be displaced or vibrate during operation, thus enhancing the structural stability of the entire system. The support plate adopts a plate-like structure, which reduces obstruction to airflow and ensures that air can enter smoothly.

[0017] In one possible design, the motor is a pneumatic motor.

[0018] With the above design, the pneumatic motor does not use electrical energy and therefore does not generate electrical sparks. This is especially important for mine environments where there are flammable and explosive gases or dust. The pneumatic motor has good tolerance to humidity and dust and is not easily affected by moisture or dust, making it suitable for working in high-humidity, dusty underground environments.

[0019] In one possible design, a lifting ring is fixed to the top side of the pipe, and a support foot is fixed to the bottom side of the pipe.

[0020] With the above design, the top lifting ring allows the equipment to be easily lifted and moved by a crane or other lifting tools, which is particularly useful in underground working environments where space is limited or frequent repositioning is required; the bottom support legs provide a stable support point, ensuring that the equipment can be placed stably on the ground, which helps to reduce vibration during operation and improve overall stability. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of a specific embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the pneumatic motor and the guide vane of this utility model;

[0023] Among them, 1. Pipe; 11. Inlet; 12. Outlet; 13. Pipe wall; 131. Annular cavity; 132. Inlet port; 14. Drain outlet; 15. Lifting ring; 16. Support leg; 2. Isolation inner pipe; 3. Motor; 4. Guide fan wheel; 41. Hub; 42. Fan plate; 43. Fan ring; 5. Spray nozzle; 6. Fixing frame; 61. Frame cylinder; 62. Support plate. Detailed Implementation

[0024] like Figure 1 , Figure 2 The illustrated pneumatic dust collector for mining includes a motor 3, a guide vane 4, a duct 1, and an inner isolation tube 2. The motor 3 is located near the inlet 11 of the duct 1 and is fixedly installed inside the duct 1. It drives the guide vane 4 to rotate, generating a powerful airflow. The guide vane 4 is connected to the output shaft of the motor 3, creating a cyclone effect when rotating at high speed, drawing in dust-laden air. The duct 1 has an inlet 11, an outlet 12, and an inner wall 13. The inner diameter of the duct 1 is larger than the outer diameter of the inner isolation tube 2. The inner isolation tube 2 is fixed inside the duct 1, located near the outlet 12. The annular cavity 131 formed between the inner isolation tube 2 and the inner wall of the duct 1 is used to collect the ejected wet dust particles, which are thrown into this cavity under centrifugal force. A drain port 14 is provided in the annular cavity 131 to discharge condensed water droplets carrying wet dust. Its working principle is as follows: 1. Air intake: Driven by motor 3, the guide fan wheel 4 rotates at high speed, generating a strong suction force, causing dust-laden air to enter from the inlet 11 of pipe 1. 2. Centrifugal separation: After entering pipe 1, the dust-laden air, under the high-speed rotation of the guide fan wheel 4, causes heavier wet dust particles to be thrown against the inner wall of the annular cavity 131 by centrifugal force, and the wet dust particles adhere to the inner wall of the annular cavity 131 and slide off. 3. Wet dust collection: In the annular cavity 131, the wet dust particles gradually gather and condense into larger water droplets. 4. Sewage discharge: The condensed water droplets are discharged through the sewage outlet 14, achieving effective removal of wet dust. 5. Clean air discharge: Clean air continues to flow forward through the interior of the isolation inner tube 2 and is finally discharged from the outlet 12 of pipe 1. This utility model utilizes the principle of centrifugal force to effectively separate air containing wet dust from clean air, improving dust removal efficiency and effect. It is suitable for wet dust treatment in high humidity environments and solves the problem that traditional dry dust removal equipment is difficult to handle wet dust.

[0025] An inlet 132 is formed between the front end of the inner isolation tube 2 and the guide fan wheel 4, leading into the annular cavity 131. Because of this inlet 132, which directly connects the inner isolation tube 2 to the annular cavity 131, the ejected wet dust can enter the annular cavity 131 more smoothly, further improving the centrifugal separation effect. The presence of the inlet 132 allows for more orderly airflow; clean air can continue to flow forward through the inner isolation tube 2, while the portion containing wet dust is guided into the annular cavity 131. This reduces airflow turbulence and helps improve the efficiency and stability of the entire system.

[0026] The drain outlet 14 is located axially in the annular cavity 131 and away from the inlet 132, at the bottom side of the pipe 1 in the direction of gravity. This bottom-positioning of the drain outlet 14 allows for more direct discharge of wet dust, reducing its accumulation within the pipe 1 and lowering the frequency and difficulty of regular cleaning. The sufficient distance between the drain outlet 14 and the inlet 132 ensures that the dust-laden air undergoes a thorough centrifugal separation process before discharge, guaranteeing effective separation of clean air and wet dust and further improving the overall dust removal efficiency.

[0027] The guide vane 4 includes a hub 41 and several fan plates 42 extending integrally outward from the outer circumference of the hub 41. The hub 41 is fixed to the output shaft, and the fan plates 42 are inclined relative to the axial direction of the hub 41, with an inclination angle between 50° and 80°. To enhance the strength of the fan plates 42, a fan ring 43 is integrally fixed to the outer circumference of the fan plates 42, connecting the individual fan plates 42. The inclined fan plates 42 can guide the airflow more evenly to the annular cavity 131, ensuring a more uniform distribution of water mist and dust particles within the annular cavity 131. This not only improves the separation efficiency but also reduces airflow turbulence and other phenomena, making the system operation more stable. More importantly, the high-speed rotating airflow generated by the guide vane 4 enhances centrifugal force, making it easier for water mist and dust particles to be thrown onto the inner wall of the annular cavity 131, further improving the separation efficiency. In addition, under certain operating conditions, when the airflow generated at the front end is strong enough, the guide fan wheel 4 can remain in a static mode. At this time, the inclined fan plate 42 can still effectively guide the airflow to the annular cavity 131 by virtue of its inclined geometry, ensuring that water mist and dust particles are evenly distributed.

[0028] A spray system is installed at inlet 11, with several spray nozzles 5 arranged around the pipe wall 13 at inlet 11. Water mist is drawn in at inlet 11, where it collides and mixes with dust particles. This mixture is then more easily ejected by centrifugal force as it passes through the guide fan impeller 4, falling into the annular cavity 131. Even if pre-wetted dust particles fall during collection, they are less likely to re-suspend in the air, reducing the risk of secondary dust re-entrainment. This improves the overall dust removal efficiency of the system, especially for wet dust that is difficult to remove by dry methods, giving the device better adaptability and flexibility.

[0029] The motor 3 is fixedly connected to the pipe wall 13 via a fixing frame 6. The fixing frame 6 includes a frame cylinder 61 and several support plates 62 arranged around the periphery of the frame cylinder 61. The motor 3 is installed inside the frame cylinder 61, and the support plates 62 are welded and fixed to the pipe wall 13. The support plates 62 adopt a plate-like structure, which is reasonably designed to reduce obstruction to airflow, help maintain uniform airflow distribution, reduce turbulence and instability, ensure that dust and water mist can be fully mixed, and improve dust removal efficiency.

[0030] Motor 3 is a pneumatic motor 3, which uses compressed air as a power source. Compared with electric drive, pneumatic motor 3 is a cleaner energy utilization method. In addition, pneumatic motor 3 has good tolerance to humidity and dust, and is not easily affected by moisture or dust, making it suitable for working in high humidity and dusty underground environments.

[0031] A lifting ring 15 is fixed to the top side of pipe 1, and a support leg 16 is fixed to the bottom side of pipe 1. The lifting ring 15 can be used to suspend the equipment at an appropriate height to adapt to different working requirements, such as avoiding obstacles or coordinating with other equipment.

Claims

1. A pneumatic dust collector for mining, characterized in that: It includes a motor (3), a guide fan wheel (4), a pipe (1), and an inner isolation tube (2). The pipe (1) has an inlet (11), an outlet (12), and an inner wall (13). The guide fan wheel (4) is connected to the output shaft of the motor (3). The motor (3) is fixedly installed inside the pipe (1). The motor (3) is located near the inlet (11) of the pipe (1). Under the action of the motor (3), the airflow enters from the inlet (11) of the pipe (1) and blows towards the outlet (12). The inner isolation tube (2) The inner sleeve is fixed inside the pipe (1). The inner diameter of the pipe (1) is larger than that of the isolation inner tube (2). The pipe wall (13) and the isolation inner tube (2) form an annular cavity (131). The isolation inner tube (2) is located near the outlet (12) relative to the motor (3). A drain port (14) is provided in the annular cavity (131). The drain port (14) is located in the axial direction of the annular cavity (131) and away from the inlet (132). The drain port (14) is located on the bottom side of the pipe (1) in the direction of gravity.

2. The mine pneumatic dust collector fan according to claim 1, characterized in that: The front end of the isolation inner tube (2) forms an inlet (132) for entering the annular cavity (131) between the front end of the isolation inner tube (2) and the guide fan wheel (4).

3. The mine pneumatic dust collector fan according to claim 1, characterized in that: The guide fan wheel (4) includes a hub (41) and a number of fan plates (42) extending outward from the outer periphery of the hub (41). The fan plates (42) are inclined relative to the axial direction of the hub (41). A fan ring (43) is fixedly attached to the outer periphery of the fan plate (42). The fan ring (43) is fixedly connected to each fan plate (42).

4. The mine pneumatic dust collector fan according to claim 1, characterized in that: A spray system is installed at the inlet (11), and the spray system has a number of spray nozzles (5), which are arranged around the pipe wall (13).

5. The mine pneumatic dust collector fan according to claim 1, characterized in that: The motor (3) is fixedly connected to the pipe wall (13) via a fixed frame (6). The fixed frame (6) includes a frame cylinder (61) and several support plates (62) arranged around the periphery of the frame cylinder (61). The motor (3) is installed inside the frame cylinder (61), and the support plates (62) are welded and fixed to the pipe wall (13).

6. The mine pneumatic dust collector fan according to claim 1, characterized in that: The motor (3) is a pneumatic motor (3).

7. The mine pneumatic dust collector fan according to claim 1, characterized in that: A lifting ring (15) is fixed to the top side of the pipe (1), and a support foot (16) is fixed to the bottom side of the pipe (1).

Images