Coal mine belt conveying straight pump rotary type foam dust falling device

Abstract

The utility model discloses a coal mine belt conveying straight pump rotary type foam dust settling device. The device comprises a nozzle, an air inlet pipe, a mixing chamber, a rotary foaming chamber and a diffusion pipe, the upper end of the nozzle is provided with a foam liquid inlet for feeding foam liquid with a mixed proportion, and the lower end of the nozzle is embedded into the mixing chamber; the air inlet pipe is used for conveying compressed air, and one end of the air inlet pipe is communicated into the cavity of the mixing chamber; the mixing chamber is used for fully mixing foam liquid and compressed air to form mixed gas liquid; the rotary foaming chamber is connected with the lower end of the mixing chamber, and the inner diameter of the rotary foaming chamber is smaller than that of the mixing chamber; the diffusion pipe is connected with the lower end of the rotary foaming chamber, the inner diameter of the inner wall is gradually increased from the position to the tail end, and foamed foam is ejected from the tail end of the diffusion pipe. The device is simple in structure, convenient to install and high in dust falling efficiency, and the foaming degree can be adjusted according to actual scenes.

Description

Technical field

[0001] The utility model belongs to the field of coal mine safety and environmental protection, and in particular relates to a direct pump rotary foam dust reduction device used in coal mine belt transportation. [Background Technology]

[0002] Coal mine belt conveyors are widely used due to their high efficiency, long transport distances, low power consumption, simple structure, stable and reliable operation, and easy operation. When coal falls from one transport link onto the belt, the impact of the drop, as well as vibrations during transport, friction, and collisions, cause coal particles to break off from the coal blocks and break into smaller particles. These particles, driven by air currents, are then blown away to form coal dust. Long-term inhalation of mine dust by underground workers can easily lead to pneumoconiosis. Coal dust itself can explode under certain conditions and can contribute to gas explosions, posing extremely serious hazards. Coal dust can also enter mechanical equipment, causing wear and tear, reducing its service life.

[0003] Currently, the mainstream method for dust reduction in coal mine conveyor belts is spray dust reduction. This method involves placing a spray pipe on a bracket alongside the conveyor belt or hanging it from the conveyor belt. Spray dust removal utilizes the atomization effect of water. Once the water is atomized into tiny droplets, these droplets collide with dust particles in the air. After the droplets absorb the dust particles, gravity causes them to fall, carrying them to the ground and achieving the dust removal goal. However, spray dust removal is limited for very small particles (e.g., particles less than 1 micron in size). This is because small dust particles undergo more intense Brownian motion, making them less easily captured by water droplets. Furthermore, small particles have less inertia, making the probability of inertial collision with water droplets relatively low. Furthermore, the hydrophobicity of coal dust makes dust removal inefficient in practical applications.

[0004] Foam dust suppression technology: Due to its strong adhesion, foam effectively adheres to dust particles. By generating foam and coating the ground or surfaces, the foam's wetting properties prevent dust particles from becoming airborne, thereby reducing airborne dust concentrations. Another significant advantage of foam dust suppression is water conservation. Foam typically has a volume several times that of liquid water, so the same amount of water can produce more foam, achieving a wider coverage effect. The foaming agent used in foam dust suppression technology is typically biodegradable and environmentally friendly. Foam dust suppression technology is particularly environmentally friendly and safe in areas with high environmental requirements, such as mines and construction sites. Foam also has a certain degree of durability. After application, the foam remains on the ground for a period of time, maintaining its dust suppression effect, unlike traditional water sprays that quickly evaporate or are blown away by wind. This means that using foam dust suppression can reduce the frequency of water spraying, improve work efficiency, and reduce operating costs. However, existing foam dust suppression devices, due to their bulky and inflexible foaming mechanisms, are ineffective in effectively suppressing dust in coal mine conveyor belts. At the same time, the coal mine belt transportation distance is long, and simply extending the injection pipeline will increase the workload, and the long-distance foam transportation will make the foam decay faster. [Utility Model Content]

[0005] The utility model proposes a coal mine belt transport straight pump rotary foam dust reduction device, which has high dust reduction efficiency and can adjust the degree of foaming according to actual scenes.

[0006] The technical solution of the utility model to solve the above technical problems is:

[0007] A coal mine belt transport straight pump rotary foam dust reduction device, the device includes a nozzle, an air inlet pipe, a mixing chamber, a rotary foaming chamber, and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a mixed proportion of foam liquid, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to convey compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and compressed air to form a mixed gas-liquid; the rotary foaming chamber is connected to the lower end of the mixing chamber, and the inner diameter is smaller than the inner diameter of the mixing chamber, so that the mixed gas-liquid is rotated and foamed; the diffusion pipe is connected to the lower end of the rotary foaming chamber, and the inner diameter of the inner wall gradually increases as the position approaches the end, and the foamed foam is ejected from the end of the diffusion pipe.

[0008] The diameter of the foam liquid inlet is smaller than the connected foam liquid pipeline connecting pipe, and the diameter of the nozzle end becomes smaller as it gets closer to the mixing chamber.

[0009] Wherein, the air inlet pipe is located at the oblique side end of the mixing chamber.

[0010] Among them, the mixing chamber has an impeller built in the cavity, and the impeller is rotatably installed in the mixing chamber cavity through a rotating rod. The impeller is fixed on the side of the cavity that is biased towards the air inlet pipe, and the center line of the nozzle and the extension line of the air inlet pipe can pass through the blades of the impeller, so that the impeller can be driven by the foam liquid stream and compressed air.

[0011] Among them, a servo motor connected to the impeller rotating rod is provided on the outside of the mixing chamber. The servo motor is used to drive the impeller to rotate when the compressed air and foam liquid pressure are insufficient.

[0012] Wherein, a rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is tightly fitted with the inner wall of the rotating foaming chamber.

[0013] The rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet. The spiral blades are fixed to the outer edge of the rotating shell. The rotor is located inside the rotating shell and is fixed to the rotating shell. The stator magnet semi-surrounds the rotor with the rotor as the center. The rotating shell and the spiral blades rotate together to generate a negative pressure zone in the rotating foaming chamber, pushing the foam forward.

[0014] Wherein, a foaming net is provided at the end of the rotating foaming chamber.

[0015] A coal mine belt transport straight pump rotary foam dust suppression device, the device includes a nozzle, an air inlet pipe, a mixing chamber, a rotary foaming chamber, and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a mixed proportion of foam liquid, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to transport compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and the compressed air to form a mixed gas and liquid; the rotary foaming chamber is connected to the lower end of the mixing chamber, and the inner diameter of the rotary foaming chamber is smaller than the inner diameter of the mixing chamber, so that the mixed gas and liquid rotate and foam; the diffusion pipe is connected to the lower end of the rotary foaming chamber, and the inner diameter of the inner wall is smaller than the inner diameter of the mixing chamber, so that the mixed gas and liquid rotate and foam; The position gradually increases as it approaches the end, and the foamed foam is ejected from the end of the diffusion tube; a rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is tightly fitted with the inner wall of the rotating foaming chamber; the rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet, the spiral blades are fixed to the outer edge of the rotating shell, the rotor is located inside the rotating shell and is connected and fixed to the rotating shell, the stator magnet semi-surrounds the rotor with the rotor as the center, the rotating shell and the spiral blades rotate together to generate a negative pressure area in the rotating foaming chamber, pushing the foam to spray forward; a foaming net is provided at the end of the rotating foaming chamber.

[0016] Compared with the existing technology, the coal mine belt conveyor direct pump rotary foam dust suppression device of the present invention has significant advantages in both structure and performance. The device uses a carefully designed nozzle system to evenly spray the foam liquid, which is then fully mixed with air in the mixing chamber to ensure a more uniform distribution of the foam liquid. Through the rotational motion of the rotating foaming chamber, the gas-liquid mixture is rapidly stirred and a stable foam is generated. During this process, the foaming multiple is controlled, and ultimately, the generated foam is efficiently ejected in the diffuser at the end, widely covering the conveyor belt surface and surrounding air of the coal mine belt conveyor system, effectively suppressing the spread of dust.

[0017] This new dust suppression system features a simple structure and is easy to install. Compared to traditional dust suppression technologies, it is more convenient to install and has lower maintenance costs, making it particularly suitable for complex coal mining environments. It offers significant dust suppression effectiveness, enabling efficient dust suppression within belt conveyor systems. Compared to traditional water spray dust suppression, this foam dust suppression technology more quickly binds and settles dust particles, preventing them from being re-inflated, maintaining fresh air and a safe working environment.

[0018] Furthermore, the device offers flexible and diverse drive options, enabling initiation and regulation of the foaming process through either physical or electrical drive. The physical drive primarily relies on the device's mechanical force and is suitable for specialized environments where electrical power is not required. The electrical drive, on the other hand, precisely controls the foam expansion ratio and efficiency, making it suitable for large-scale, continuous operations. Both drive options can be selected based on specific needs, ensuring optimal performance in a variety of operational scenarios.

[0019] Changing the source foaming to end foaming is an innovation of the present utility model. Unlike traditional source foaming technology, end foaming can more accurately control the foaming degree and spray coverage of the foam. This design allows the equipment to be flexibly adjusted according to the different scenarios of coal mine belt transportation. It can not only provide strong dust reduction in high-dust environments, but also save resources and avoid excessive foam waste by reducing the foaming multiple when there is less dust. This flexibility not only improves the accuracy of the dust reduction effect, but also gives coal mining companies more choices in different seasons and working conditions. They can optimize the use of equipment according to actual needs and achieve the best cost-effectiveness.

[0020] In summary, the present invention's coal mine belt conveyor direct pump rotary foam dust suppression device far surpasses existing technologies in dust suppression efficiency, ease of installation, flexibility, and adaptability, and has great application prospects. Through its highly efficient foam dust suppression mechanism, it can effectively reduce dust pollution in coal mine operations, protect worker health, comply with environmental protection requirements, and provide a more advanced and sustainable dust suppression solution for the coal mining industry.

Brief Description of the Drawings

[0021] Figure 1 This is a cross-sectional view of a coal mine belt transport straight pump rotary foam dust suppression device according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 The diagram shows the usage scenario of the coal mine belt transport direct pump rotary foam dust suppression device;

[0023] Figure 3 for Figure 1 Detail of the mixing chamber in the coal mine belt conveyor straight pump rotary foam dust suppression device shown;

[0024] Figure 4 for Figure 1 Detailed view of the rotary foaming chamber in the coal mine belt conveyor direct pump rotary foam dust suppression device shown;

[0025] Figure 5 for Figure 1 An enlarged view of the details of the rotating foaming chamber in the coal mine belt conveyor straight pump rotary foam dust suppression device is shown.

[0026] In the figure: 1-air inlet pipe, 2-servo motor, 3-rotating foaming chamber, 4-foaming net, 5-diffuser, 6-foam liquid inlet, 7-nozzle, 8-mixing chamber, 9-impeller, 10-rotator, 11-compressed air duct, 12-compressed air duct adapter, 13-foam liquid duct, 14-foam liquid duct connecting pipe, 15-rotating rod, 16-rotor housing, 17-stator magnet, 18-rotor, 181-rotor winding, 182-winding copper wire, 183-rotor joint, 184-converter, 185-brush, 19-rotating housing, 20-spiral thin blade, 21-spiral rod. [Specific implementation method]

[0027] Figures 1 to 5 The figure shows the coal mine belt transport straight pump rotary foam dust suppression device of this embodiment, which includes a nozzle 7, an air inlet pipe 1, a mixing chamber 8, a rotary foaming chamber 3, and a diffusion pipe 5.

[0028] The foam liquid must be prepared in advance for use. The foam liquid primarily consists of a foaming agent, a wetting agent, and a stabilizer. These three main components are mixed with water in varying proportions, and the mixing ratio directly affects the foam's dust reduction performance. The three components vary significantly depending on the scenario. The prepared foam is pumped through the foam liquid pipe 13 to the designated area, depending on the actual situation. The foam liquid pipe connection 14 is larger than the diameter of the foam liquid inlet 6, allowing the foam liquid inlet 6 to flow directly into the foam liquid pipe connection 14. The same principle applies to the compressed air pipe 12, but the compressed air pipe adapter 12 has a smaller inner diameter than the main compressed air pipe 11. This design is based on the principle that, at the same pressure, the smaller the pipe inner diameter, the greater the compressed air flow rate. This principle also applies to the nozzle 7. As the nozzle 7 approaches the mixing chamber 8, the diameter of the nozzle 7 decreases, and the foam liquid flow rate in this section of the nozzle 7 increases. This allows the foam liquid to be pumped into the foaming chamber while simultaneously driving the impeller 9 to rotate. The compressed air from the air inlet pipe 1 also drives the impeller 9 to rotate. Since the servo motor 2 can be driven by electricity, the impeller 9 will not stop working due to insufficient pipeline pump pressure. The rotating impeller 9 can mix the foam liquid and gas. At the same time, due to inertia, the mixed gas and liquid will further enter the rotating foaming chamber 3. There is a rotator 10 in the rotating foaming chamber 3. The structure of the rotator 10 is a spiral rod 21 with a spiral line. The rotator 10 fits tightly with the rotating foaming chamber 3 without generating friction. There is also a foaming net 4 at the end of the rotator 10 near the end of the diffusion tube 5. The foaming net 4 can re-foam the foam liquid that has not been foamed. All foamed foam liquids will eventually become foam beams and be ejected by the diffusion tube 5.

[0029] The details of the mixing chamber and the rotating foaming chamber are as follows: Figure 3 、 Figure 4 、 Figure 5As shown. The mixing chamber structure diagram mainly includes a rotating rod 15 and an impeller 9. The servo motor 2 can drive the rotating rod 15 to drive the impeller 9 to rotate. The rotating impeller 9 can promote the mixing of gas and liquid very well. The mixed foam gas and liquid will foam in the rotating foaming chamber 3. The main structure of the rotating foaming chamber 3 is composed of a rotator 10. The rotation principle of the rotator 10 is based on the interaction between electromagnetic induction and the magnetic field generated by the current passing through the conductor. The inside of the spiral rod 21 is the rotating shell 19. The two ends of the rotating shell 19 are connected to the rotor joint 183. The rotation of the rotor 18 will drive the rotating shell 19 to rotate, and the spiral thin blades 20 on the rotating shell 19 will also rotate together. Further in, there is a rotor housing 16, which contains two stator magnets 17. The stator magnets 17 are fixed inside the rotor housing 16 and are symmetrically distributed with respect to the central axis of the circle. Inside the rotor housing 16, which is surrounded by the stator magnets 17, there is a rotor winding 181, and on the rotor winding 181, there is a winding copper wire 182. When current passes through the brushes 185 and converter 184 on the rotor, the current generates magnetism after passing through the winding copper wire 182, and the rotor generates a magnetic field. This interacts with the stator magnets 17, and according to Ampere's law, a torque (Lorentz force) is generated, causing it to rotate.

[0030] The specific operation method is to first install the coal mine belt conveyor direct pump rotary foam dust suppression device, connect the interface of the air inlet pipe 1 to the compressed air pipe adapter 12 to allow compressed air to enter the device, then connect the foam liquid inlet 6 to the foam liquid pipeline pipe 14, adjust the appropriate angle so that the opening of the diffusion pipe 5 faces the coal dust area, open the foam liquid pipeline 14 and the compressed air pipeline 11, allow the gas and liquid to enter the mixing chamber of the device, and connect the rotator 10. The rotator 10 transmits current to the copper wire 182 around the column through the brush 185. The copper wire 182 around the column generates magnetism and drives the rotor 18 to rotate under the action of the stator magnet 17. The rotation of the rotor 18 drives the rotating shell 19 to rotate, and the spiral thin blades 20 on the rotating shell 19 also rotate together, pushing the foam forward. Some foam liquid that has not been mixed and foamed will also complete the final foaming under the drive of the foaming net 4 and the rotator 10 and be ejected to one end of the diffusion pipe 5.

[0031] It should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A coal mine belt transport direct pump rotary foam dust suppression device, characterized in that: The device includes a nozzle, an air inlet pipe, a mixing chamber, a rotating foaming chamber, and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a mixed proportion of foam liquid, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to transport compressed air, and one end of which leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and compressed air to form a mixed gas-liquid; the rotating foaming chamber is connected to the lower end of the mixing chamber, and its inner diameter is smaller than the inner diameter of the mixing chamber, so that the mixed gas-liquid is rotated and foamed; the diffusion pipe is connected to the lower end of the rotating foaming chamber, and the inner diameter of the inner wall gradually increases as the position approaches the end, and the foamed foam is ejected from the end of the diffusion pipe.

2. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1 is characterized in that: The diameter of the foam liquid inlet is smaller than the connected foam liquid pipeline connecting pipe, and the diameter of the nozzle end becomes smaller as it gets closer to the mixing chamber.

3. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1, characterized in that: The air inlet pipe is located at the oblique side end of the mixing chamber.

4. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1, characterized in that: The mixing chamber has an impeller built into the cavity. The impeller is rotatably installed in the mixing chamber cavity through a rotating rod. The impeller is fixed on the side of the cavity that is biased towards the air inlet pipe. The center line of the nozzle and the extension line of the air inlet pipe can pass through the blades of the impeller, so that the impeller can be driven by the foam liquid stream and compressed air.

5. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 4, characterized in that: A servo motor connected to the impeller rotating rod is provided on the outside of the mixing chamber. The servo motor is used to drive the impeller to rotate when the compressed air and foam liquid pressure are insufficient.

6. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 1, characterized in that: A rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is in close contact with the inner wall of the rotating foaming chamber.

7. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 6, characterized in that: The rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet. The spiral blades are fixed to the outer edge of the rotating shell. The rotor is located inside the rotating shell and is fixedly connected to the rotating shell. The stator magnet semi-surrounds the rotor with the rotor as the center. The rotating shell and the spiral blades rotate together to generate a negative pressure area in the rotating foaming chamber, pushing the foam forward to spray.

8. The coal mine belt transport direct pump rotary foam dust suppression device according to claim 6, characterized in that: A foaming net is provided at the end of the rotary foaming chamber.

9. A coal mine belt transport direct pump rotary foam dust suppression device, characterized in that: The device includes a nozzle, an air inlet pipe, a mixing chamber, a rotating foaming chamber, and a diffusion pipe; the upper end of the nozzle is provided with a foam liquid inlet for receiving a foam liquid mixed in a certain proportion, and the lower end of the nozzle is embedded in the mixing chamber; the air inlet pipe is used to transport compressed air, and one end of the air inlet pipe leads to the cavity of the mixing chamber; the mixing chamber is used to fully mix the foam liquid and the compressed air to form a mixed gas and liquid; the rotating foaming chamber is connected to the lower end of the mixing chamber, and its inner diameter is smaller than that of the mixing chamber, so that the mixed gas and liquid rotate and foam; the diffusion pipe is connected to the lower end of the rotating foaming chamber, and the inner diameter of the inner wall gradually increases as the position approaches the end , the foamed foam is ejected from the end of the diffusion tube; a rotator is provided in the rotating foaming chamber, and the outer edge of the rotator is tightly fitted with the inner wall of the rotating foaming chamber; the rotator includes a rotating shell, spiral blades, a rotor, and a stator magnet, the spiral blades are fixed to the outer edge of the rotating shell, the rotor is located inside the rotating shell and is fixed to the rotating shell, the stator magnet semi-surrounds the rotor with the rotor as the center, the rotating shell and the spiral blades rotate together to generate a negative pressure area in the rotating foaming chamber, pushing the foam to spray forward; a foaming net is provided at the end of the rotating foaming chamber.

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