Intelligent ventilation device for coal mine

Abstract

This utility model discloses an intelligent ventilation device for coal mines, including a ventilation box. The ventilation box is equipped with a dust suppression chamber and a ventilation chamber, which are interconnected. A ventilation fan is installed inside the ventilation chamber. An atomizing spray box and a water receiving trough are respectively provided at the position of the dust suppression chamber, and the positions of the atomizing spray box and the water receiving trough are vertically aligned. A baffle plate is arranged in an array near the outlet of the dust suppression chamber, and the positions of two adjacent baffle plates are staggered vertically. A base is fixed at the bottom of the ventilation box. The atomized spray humidifies the air, causing the dust particles to become heavier and fall. Combined with water circulation, it achieves efficient dust suppression, significantly reducing the dust concentration in the coal mine working area or roadway, avoiding the secondary dust problem of traditional dry dust suppression. The baffle plate generates an inertial separation effect through an S-shaped path design, effectively preventing the problem of dust escape.

Description

Technical Field

[0001] This utility model relates to the field of coal mine ventilation technology, specifically to an intelligent ventilation device for coal mines. Background Technology

[0002] Coal mine ventilation is the process of mechanically or naturally delivering fresh air into the underground working area while expelling dust and other pollutants. This process aims to maintain the oxygen content of the underground air, dilute the concentration of harmful gases, and regulate temperature and humidity, ensuring miner safety and meeting working environment standards. Traditional ventilation mainly uses axial flow fans to drive airflow, which, in conjunction with the roadway layout, forms directional airflow. When necessary, water spraying is used to assist in dust suppression.

[0003] In the prior art, a ventilation device for coal mines disclosed in patent publication number "CN221195107U" relates to the technical field of ventilation in coal mine production. It includes an air guide box, a first motor, a fan, and a cleaning assembly. Both ends of the air guide box are open. The first motor is located inside the air guide box and fixedly connected to one side of the air guide box near one of the open ends. The fan is coaxially and fixedly connected to the output shaft of the first motor. A filter screen is fixedly connected inside the air guide box, located to one side of the fan. The cleaning assembly is used to clean dust from the filter screen. This application has the advantage of facilitating timely cleaning of the filter screen.

[0004] However, existing technologies still have significant shortcomings. Traditional coal mine ventilation devices mostly adopt simple fan direct discharge or separate dust suppression designs. Not only are the equipment bulky, but there are also obvious dust problems. Especially when using atomized spray dust suppression, the humidified dust and liquid are easily discharged again with the airflow, resulting in secondary pollution of the working environment. The dust suppression effect is unstable and the maintenance cost is high. Utility Model Content

[0005] The purpose of this utility model is to provide an intelligent ventilation device for coal mines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a coal mine intelligent ventilation device, comprising a ventilation box, wherein a dust suppression chamber and a ventilation chamber are respectively provided inside the ventilation box, and the ventilation chamber and the dust suppression chamber are interconnected. A ventilation fan is installed inside the ventilation chamber. An atomizing spray box and a water receiving trough are respectively provided at the position of the dust suppression chamber, and the positions of the atomizing spray box and the water receiving trough are vertically aligned. A baffle plate is arranged in an array near the outlet of the dust suppression chamber, and the positions of two adjacent baffle plates are staggered vertically. A base is fixed at the bottom of the ventilation box.

[0007] As can be seen, in the above technical solution, the dust particles are made heavier and fall by atomizing and spraying the air to make the dust droplets fall. Combined with water circulation, the dust is effectively reduced, significantly reducing the dust concentration in the coal mine operation area or roadway. This avoids the secondary dust problem of traditional dry dust suppression. The baffle plate generates an inertial separation effect through the S-shaped path design, which effectively avoids the problem of dust escape.

[0008] Preferably, the baffle is bolted to the inner wall of the ventilation box, and the baffle is inclined from top to bottom.

[0009] As can be seen, in the above technical solution, the baffle plate is installed at an angle. Due to its large mass, the humidifying dust will break away from the airflow and impact the plate surface at sharp turns due to inertia, and then slide down the inclined plate into the water collection tank.

[0010] Preferably, the water receiving trough is provided with a filter plate, and the water receiving trough is trapezoidal, with the filter plate engaged at the positions of the inclined surfaces on both sides of the water receiving trough.

[0011] As can be seen, in the above technical solution, the trapezoidal water receiving tank can be adapted to filter plates of different widths, which is convenient for installation. At the same time, the filter plate can filter the sprayed liquid.

[0012] Preferably, a water level sensor is installed inside the water receiving tank, and an environmental sensor is bolted to the surface of the ventilation box.

[0013] As can be seen, in the above technical solution, the water level sensor can detect the liquid level in the water tank and determine whether the required liquid needs to be added. The environmental sensor is a dust content sensor, which can be installed at the inlet or outlet of the device to monitor the dust content in the air.

[0014] Preferably, the ventilation box is provided with a circulation pipe and a liquid replenishment pipe on its side, the base is provided with a water storage chamber, and the water inlet end of the liquid replenishment pipe is connected to the liquid replenishment interface flange of the water storage chamber.

[0015] As can be seen, in the above technical solution, the liquid in the water storage chamber can be pumped out to complete the replenishment operation through the cooperation of the replenishment pipe, water pump and valve.

[0016] Preferably, both ends of the circulation pipe are connected to the connection points of the atomizing spray box and the water receiving tank, respectively, and the replenishment pipe is connected to the replenishment interface flange of the circulation pipe.

[0017] As can be seen, in the above technical solution, the circulation pipe can also be used to circulate water into the atomizing spray box with the cooperation of components such as a water pump, and wait to be sprayed out.

[0018] Compared with the prior art, the beneficial effects of this utility model are: This system integrates ventilation and dust suppression, using atomized spraying to humidify the air, causing dust particles to become heavier and fall. Combined with water circulation, it achieves highly efficient dust suppression, significantly reducing dust concentration in coal mine operating areas or roadways. This avoids the secondary dust generation problem associated with traditional dry dust suppression. The baffle plate, with its S-shaped path design, creates an inertial separation effect. When the dust-laden airflow passes through at a specified speed, the humidified dust, due to its larger mass, is deflected by inertia at sharp turns, impacting the plate surface and sliding down the inclined plate into the water collection tank. This structure effectively prevents dust escape, ensuring that the dust content in the treated air remains within the specified range. It prevents problems caused by excessively high dust levels in the operating area. The system is simple in structure, occupies a small area, and is easy to move. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a schematic diagram of the interior of the ventilation box of this utility model; Figure 4 This is a schematic diagram of the internal structure of this utility model; Figure 5 This is a rear view of the present invention.

[0020] In the diagram: 1. Ventilation box; 2. Dust settling chamber; 3. Ventilation chamber; 4. Ventilation fan; 5. Water receiving tank; 6. Atomizing spray box; 7. Filter plate; 8. Baffle plate; 9. Water level sensor; 10. Base; 11. Water storage chamber; 12. Circulation pipe; 13. Liquid replenishment pipe; 14. Environmental sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: Example 1: A smart ventilation device for coal mines: It includes a ventilation box 1, with a dust-suppressing chamber 2 and a ventilation chamber 3 inside, connected to each other. A ventilation fan 4 is installed inside the ventilation chamber 3. The ventilation box 1 is the outer shell of the ventilation device. The front end of the ventilation box 1 is polygonal, with a rectangular opening and internal passage for easy addition or installation of necessary components. The rear end is cylindrical for easy installation of the ventilation fan 4, thus forming two chambers: the dust-suppressing chamber 2 and the ventilation chamber 3. The dust-suppressing chamber 2 is mainly used for dust suppression of the incoming air, while the ventilation chamber 3 mainly allows airflow to exit through an outlet at the back of the ventilation box 1. The ventilation fan 4 is driven by a motor to rotate. When fan 4 rotates, it draws air in from the inlet of ventilation box 1, treats it with dust, and finally discharges it from the outlet at the back of ventilation box 1. The tilt angle of the fan blades draws air in axially and throws it out radially, forming a negative pressure zone and a positive pressure zone. The air pressure at the inlet decreases and the air pressure at the outlet increases, thus pushing the air from the inlet to the outlet. After ventilation box 1 draws in dusty air from the coal mine area, it uses the internal dust-suppressing structure to reduce the dust in the incoming air. The purified air is discharged from the outlet, which can reduce the dust concentration and prevent secondary dust diffusion. Through the pressure difference cycle of continuously drawing in polluted air and discharging clean air, a stable ventilation effect is finally formed, ensuring the safety of air in the mine. The device can be put into operation simply by placing it in the working area and turning on the power.

[0023] A misting spray box 6 and a water receiving trough 5 are respectively installed at the location of the dust settling chamber 2. The misting spray box 6 and the water receiving trough 5 are vertically aligned. A filter plate 7 is installed at the water receiving trough 5. The water receiving trough 5 is trapezoidal, and the filter plate 7 is engaged at the inclined surfaces on both sides of the water receiving trough 5. The dust settling chamber 2 mainly uses misting spray to spray the liquid in the misting spray box 6 to humidify the incoming air, causing the dust in the air to be weighed up and fall into the water receiving trough 5 below. The water receiving trough 5 is trapezoidal, and a filter plate 7 of appropriate size can be placed in the water receiving trough. 5. The filter plate 7 is inserted into the water tank 5. Different sizes of filter plates 7 are positioned in different locations in the water tank 5. They can be selected and replaced according to needs, so that the liquid is concentrated in the center. Some of the humidified dust can fall directly onto the filter plate 7 in the water tank 5. The liquid can be filtered through the filter plate 7, and the liquid in the water tank 5 can be recycled. A water pump is added and connected to the circulation pipe 12 to circulate the filtered liquid in the water tank 5 into the atomizing spray box 6, where it is atomized and sprayed out by pressurization.

[0024] A base 10 is fixed to the bottom of the ventilation box 1. A water level sensor 9 is installed inside the water tank 5. A circulation pipe 12 and a replenishment pipe 13 are respectively provided on the side of the ventilation box 1. A water storage chamber 11 is opened inside the base 10, and the water inlet end of the replenishment pipe 13 is connected to the replenishment interface flange of the water storage chamber 11. The two ends of the circulation pipe 12 are respectively connected to the connection points of the atomizing spray box 6 and the water tank 5, and the replenishment pipe 13 is connected to the replenishment interface flange of the circulation pipe 12. In order to prevent the liquid from gradually decreasing, a water storage chamber 11 is added inside the base 10 and connected to the circulation pipe 12 through the replenishment pipe 13. All pipes are controlled by valves. The system can be activated after the water level sensor 9 in the water tank 5 detects that the liquid level inside is lower than the set threshold. The water pump in the water storage chamber 11 sends liquid from the replenishment pipe 13 into the circulation pipe 12 to complete the replenishment operation. The water storage chamber 11 can be manually replenished by the operator by opening the sealing plug. The water level sensor 9 is a resistive water level sensor. When more water is immersed, the conductivity is good and the resistance is low. Similarly, when less water is immersed, the conductivity is poor and the resistance is high, thus realizing water level detection. The sensor consists of a set of exposed metal electrodes. When the water level rises and submerges the electrodes, the water acts as a conductive medium, causing the resistance between the electrodes to decrease. When the water level drops, the electrodes are exposed, and the resistance increases. By measuring the change in the resistance value between the electrodes, it is determined whether the water level has reached the set threshold. The detection circuit outputs a signal to trigger the replenishment system. The replenishment pump and other components are controlled by a PLC.

[0025] A baffle plate 8 is arranged near the outlet of the dust settling chamber 2, with adjacent baffle plates 8 staggered vertically. The baffle plates 8 are bolted to the inner wall of the ventilation box 1, and the baffle plates 8 are inclined from top to bottom. Since the ventilation fan 4 can draw in air and discharge it from the outlet, the humidified dust is easily drawn in by the ventilation fan 4 under normal circumstances. Therefore, to prevent the humidified dust from being discharged from the outlet, a baffle plate 8 is added near the outlet of the dust settling chamber 2. Some of the humidified dust needs to pass through multiple baffle plates 8 after being drawn in by the ventilation fan 4, while the air passes through the baffle plates 8 in an S-shaped path. The humidified dust falls directly onto the baffle plate 8. Since the baffle plate 8 is tilted towards the water tank 5, the humidified dust falls onto the baffle plate 8 and then slides down the inclined surface into the water tank 5. Through the baffle plate 8, the airflow is forced to change direction multiple times when the ventilation fan 4 draws in air. The inertia prevents the humidified dust from following the airflow and impacting the surface of the baffle plate 8. Finally, the dust slides down the inclined surface into the water tank 5. The purified air can then pass through the gaps in the baffle plate 8 and be discharged from the outlet, effectively preventing the escape of wet dust and ensuring that both the humidified dust and liquid can enter the water tank 5.

[0026] An environmental sensor 14 is bolted to the surface of the ventilation box 1. An environmental sensor 14 is added at the inlet of the ventilation box 1. The environmental sensor 14 is a dust content sensor, mainly used to monitor the dust content in the air. It can detect the dust content in the air by using the principle of laser detection. The dust content can be detected before the air enters the ventilation box 1. If the dust content is too high, dust reduction can be carried out in time. Similarly, a dust content sensor can also be added at the outlet of the ventilation box 1. When the dust content in the exhaust air is too high, it can be detected in time and the staff will be alerted by buzzer, etc., thereby realizing the intelligence of the device and having intelligent functions such as dust content detection and water level detection.

[0027] Working principle: The ventilation box 1 is the outer shell of the ventilation device. The front end of the ventilation box 1 is polygonal, while the opening and internal channels are rectangular to facilitate the addition or installation of necessary components. The rear end is cylindrical to facilitate the installation of the ventilation fan 4, thus forming two chambers: a dust settling chamber 2 and a ventilation chamber 3. The dust settling chamber 2 is mainly used to set off dust from the incoming air, while the ventilation chamber 3 allows airflow to exit through the outlet at the back of the ventilation box 1. In the dust settling chamber 2, liquid from the atomizing spray box 6 is sprayed out through atomization spraying to humidify the incoming air, causing the dust in the air to settle and disperse. The humidified dust falls into the water collection tank 5 below. Some of the humidified dust can fall directly onto the filter plate 7 of the water collection tank 5. The filter plate 7 can filter the liquid. After being sucked in by the ventilation fan 4, some of the humidified dust needs to pass through multiple baffles 8. Through the baffles 8, the airflow is forced to change direction multiple times when the ventilation fan 4 draws in air. Using inertia, the humidified dust cannot follow the airflow to change direction and will hit the surface of the baffles 8. Finally, it slides down the inclined plate surface to the water collection tank 5. The purified air can flexibly pass through the gaps in the baffles 8 and be discharged from the outlet, effectively preventing the escape of wet dust and ensuring that both the humidified dust and liquid can enter the water collection tank 5.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart ventilation device for coal mines, characterized in that: The ventilation box (1) includes a dust settling chamber (2) and a ventilation chamber (3) inside the ventilation box (1), and the ventilation chamber (3) and the dust settling chamber (2) are interconnected. A ventilation fan (4) is installed inside the ventilation chamber (3). An atomizing spray box (6) and a water receiving tank (5) are respectively provided at the position of the dust settling chamber (2), and the positions of the atomizing spray box (6) and the water receiving tank (5) are vertically aligned. A baffle plate (8) is arranged in an array near the outlet of the dust settling chamber (2), and the positions of two adjacent baffle plates (8) are staggered vertically. A base (10) is fixed at the bottom of the ventilation box (1).

2. The intelligent ventilation device for coal mines according to claim 1, characterized in that: The baffle (8) is bolted to the inner wall of the ventilation box (1), and the baffle (8) is inclined from top to bottom.

3. The intelligent ventilation device for coal mines according to claim 1, characterized in that: The water receiving trough (5) is provided with a filter plate (7), and the water receiving trough (5) is trapezoidal, and the filter plate (7) is engaged at the position of the inclined surfaces on both sides of the water receiving trough (5).

4. The intelligent ventilation device for coal mines according to claim 1, characterized in that: The water receiving tank (5) is equipped with a water level sensor (9), and the ventilation box (1) is bolted to the surface of an environmental sensor (14).

5. The intelligent ventilation device for coal mines according to claim 4, characterized in that: The ventilation box (1) is provided with a circulation pipe (12) and a replenishment pipe (13) on its side. The base (10) has a water storage chamber (11) inside, and the water inlet of the replenishment pipe (13) is connected to the replenishment interface flange of the water storage chamber (11).

6. The intelligent ventilation device for coal mines according to claim 5, characterized in that: The two ends of the circulation pipe (12) are connected to the connection points of the atomizing spray box (6) and the water receiving tank (5) respectively, and the replenishment pipe (13) is connected to the replenishment interface flange of the circulation pipe (12).

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