A new type of mining exhaust fan unit

Abstract

This utility model relates to the field of ventilation and air exchange, specifically a novel mine ventilation unit. It includes two ventilation fans arranged one behind the other as backups. Each ventilation fan comprises a housing, blades, and a control system. An electric motor is centrally located within the housing and fixedly connected to it. The motor's rotor is fixedly connected to a rotating head. Several blades are rotatably connected to the side of the rotating head, with the connection point between the blades and the rotating head located in the lower middle part of the blades. A coil spring is installed within the connection point between the rotating head and the blades to align the blades with the airflow direction. The rotation range of the blades is 0–60°. The mine ventilation unit also includes a backup ventilation fan. The motor of the backup ventilation fan is electrically connected to the control system, which receives signals, controls the opening and closing of the ventilation fan, and outputs signals to the outside. This utility model achieves the purpose of a novel mine ventilation unit by incorporating an automatic shutdown and startup backup ventilation fan.

Description

Technical Field

[0001] This utility model relates to the field of ventilation and air exchange, specifically a new type of ventilation unit for mining. Background Technology

[0002] Throughout the long history of human technological development, raw material extraction has always been a crucial aspect. From the extraction of stones and plants in primitive societies to the extraction of fossil fuels in modern societies, people have placed increasing emphasis on the mining of raw materials.

[0003] Coal mining has received significant attention from various countries, as it has wide applications in thermal power generation, chemical industry, and other fields. Coal mining generally employs two methods: open-pit mining and underground mining. Underground mining is favored due to its advantages such as lower cost, less environmental pollution, and less impact on the environment. However, mines often suffer from poor ventilation, necessitating the installation of ventilation equipment, such as exhaust fans. However, existing exhaust fans have a drawback: when they malfunction and stop working, oxygen deficiency occurs inside the mine. To prevent this, long-term monitoring is typically required to promptly repair or replace the exhaust fan when it fails, a method that is extremely labor-intensive.

[0004] In view of this, in order to overcome the above-mentioned technical problems, this utility model designs a new type of mining exhaust fan unit, which solves the above-mentioned technical problems. Utility Model Content

[0005] The technical objective of this utility model is to develop a new type of mine ventilation unit that requires no personnel on duty.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a new type of mining exhaust fan unit, which includes two exhaust fans arranged one in front of the other as backups for each other.

[0008] The exhaust fan includes an outer casing and blades. An electric motor is located at the center of the outer casing and is fixedly connected to the outer casing. The rotor of the electric motor is fixedly connected to a rotating head. Several blades are rotatably connected to the side of the rotating head. The connection between the blades and the rotating head is located in the lower middle part of the blades. A coil spring is installed inside the connection between the rotating head and the blades. The coil spring is used to make the blades align with the wind direction. The rotation range of the blades is 0 to 60°.

[0009] Both motors of the aforementioned exhaust fans are electrically connected to a control system. This control system receives signals, controls the operation of the exhaust fans (on and off), and outputs signals to the outside world. The control system uses PLC control, which is existing technology and will not be described in detail here.

[0010] When the exhaust fan is off, the coil spring applies pressure to the blades, making them perpendicular to the top surface of the outer casing. When the exhaust fan is started, the motor drives the rotor to rotate, which in turn rotates the blades. Since the connection between the blades and the rotor is located in the lower middle part of the blades, the wind resistance on the upper part of the blades is greater than that on the lower part, so the blades will rotate until they reach their maximum angle. Because the blades have rotated a certain angle, the blades generate airflow when the rotor rotates.

[0011] When the control system detects a malfunction in the exhaust fan, it will automatically shut down and start the backup exhaust fan. This prevents a complete shutdown due to exhaust fan failure when no one is on duty. Simultaneously, it will remotely alert external personnel for maintenance, thus enabling unattended operation. Furthermore, the blades of the shut-down exhaust fan will rotate to be perpendicular to the top surface of the casing, thus avoiding affecting the efficiency of the restarted exhaust fan.

[0012] Preferably, a plurality of slide rails are provided on the side and bottom surfaces of the outer casing, and a plurality of slide grooves are provided on the top surface of the outer casing. The slide rails and slide grooves are shaped to match each other, and the slide rails and slide grooves are used for sliding connection between the two exhaust fans and between them and the surrounding walls.

[0013] The exhaust fans are slidably connected to the surrounding walls via side rails, and are connected to each other via top grooves and bottom rails. When the exhaust fan stops, it can be directly removed from the wall for replacement and maintenance. This method greatly facilitates the replacement and maintenance of the exhaust fans.

[0014] Preferably, a handle is provided on the front of the outer casing, which allows the operator to directly pull the exhaust fan. The operator can use the handle to pull the stopped exhaust fan out of the wall for easy replacement and maintenance.

[0015] Preferably, a power socket is provided on the front of the housing. The power socket is electrically connected to the control system and the motor. The power socket is used to receive external current and transmit the current to the motor and the control system. Powering the exhaust fan through the power socket is very simple and convenient; when the exhaust fan needs to be replaced, simply unplug the wire from the power socket.

[0016] Preferably, an anemometer is installed on the outer casing, and the anemometer is electrically connected to the control system. The anemometer feeds back the measured data to the control system. When the wind speed is too low, the control system determines it as a fault, then shuts down the system and remotely alerts external personnel to perform maintenance.

[0017] Preferably, a thermometer is installed inside the motor, and the thermometer is electrically connected to the control system. The thermometer is used to detect the internal temperature of the motor. When an excessively high temperature is detected, the control system determines that a fault has occurred, then stops the motor and remotely alerts external personnel to carry out maintenance.

[0018] Preferably, the new type of mining ventilation unit further includes a fuse for circuit protection and is electrically connected to the control system. When the current is overloaded, the fuse blows, the control system determines a fault, and then shuts down the unit and remotely alerts external personnel to perform maintenance.

[0019] Beneficial effects: When the exhaust fan is stopped, the coil spring applies pressure to the blades, making them perpendicular to the top surface of the outer casing. When the exhaust fan starts, the motor drives the rotor to rotate, which in turn rotates the blades. Since the connection between the blades and the rotor is located in the lower middle part of the blades, the wind resistance on the upper part of the blades is greater than that on the lower part, causing the blades to rotate until they reach their maximum angle. Because the blades rotate at a certain angle, they generate airflow when the rotor rotates. When the control system detects a malfunction in the exhaust fan, it automatically stops and starts the backup exhaust fan. This avoids a complete shutdown due to exhaust fan failure when unattended, and remotely alerts external personnel for maintenance, thus enabling unattended operation. Furthermore, the stopped exhaust fan blades rotate to be perpendicular to the top surface of the outer casing, thus avoiding affecting the efficiency of the started exhaust fan. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the shutdown state of this utility model;

[0023] Figure 3 This is a schematic diagram of the power-on state of this utility model;

[0024] Figure 4 This is a schematic diagram of the anemometer of this utility model.

[0025] In the diagram: outer casing 1, motor 11, rotor 12, slide rail 13, slide rail 14, handle 15, power socket 16, blade 2, anemometer 3. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments. To address the problem that existing mine ventilation fans require real-time human supervision, the following solution is proposed:

[0029] like Figures 1-4 As shown, a new type of mining ventilation unit includes two ventilation fans arranged one in front of the other as backups for each other.

[0030] The exhaust fan includes a housing 1 and blades 2. A motor 11 is located at the center of the housing 1 and is fixedly connected to the housing 1. The rotor of the motor 11 is fixedly connected to a rotating head 12. Several blades 2 are rotatably connected to the side of the rotating head 12. The connection between the blades 2 and the rotating head 12 is located in the lower middle part of the blades 2. A coil spring is provided inside the connection between the rotating head 12 and the blades 2. The coil spring is used to make the blades 2 align with the wind direction. The rotation range of the blades 2 is 0 to 60°.

[0031] Both motors of the aforementioned exhaust fans are electrically connected to the control system. The control system is used to receive signals, control the opening and closing of the exhaust fans, and output signals to the outside world. The control system adopts the existing PLC control of exhaust fans, which is prior art and will not be described in detail.

[0032] When the exhaust fan is off, the coil spring applies pressure to the blades 2, making the blades 2 perpendicular to the top surface of the outer casing 1. When the exhaust fan is started, the motor 11 drives the rotor 12 to rotate, thereby causing the blades 2 to rotate. Since the connection between the blades 2 and the rotor 12 is located in the lower middle part of the blades 2, the wind resistance on the upper part of the blades 2 is greater than the wind resistance on the lower part. Therefore, the blades 2 will rotate until they reach their maximum angle. Since the blades 2 have rotated a certain angle, when the rotor 12 rotates, the blades 2 will generate wind force.

[0033] When the control system detects a malfunction in the exhaust fan, it will automatically shut down and start the backup exhaust fan. This avoids a complete shutdown due to exhaust fan failure when no one is on duty. At the same time, it will remotely alert external personnel to carry out maintenance, thus achieving unattended operation. In addition, the blades 2 of the shut-down exhaust fan will rotate to be perpendicular to the top surface of the outer casing 1, thus avoiding affecting the efficiency of the started exhaust fan.

[0034] like Figures 1-4 As shown, a plurality of slide rails 14 are provided on the side and bottom surfaces of the outer casing 1, and a plurality of slide grooves 13 are provided on the top surface of the outer casing 1. The slide rails 14 and slide grooves 13 are shaped to match each other, and the slide rails 14 and slide grooves 13 are used for sliding connection between the two exhaust fans and between them and the surrounding walls.

[0035] The exhaust fan is slidably connected to the surrounding walls via the side slide rail 14. The exhaust fans are slidably connected to each other via the top slide groove 13 and the bottom slide rail 14. When the exhaust fan is stopped, it can be directly removed from the wall for replacement and maintenance. This method makes the replacement and maintenance of the exhaust fan very convenient.

[0036] like Figures 1-4 As shown, a handle 15 is provided on the front of the outer casing 1, which is used by the operator to directly pull the exhaust fan. Using the handle 15, the operator can pull the stopped exhaust fan out of the wall for easy replacement and maintenance.

[0037] like Figures 1-4 As shown, a power socket 16 is provided on the front of the outer casing 1. The power socket 16 is electrically connected to the control system and the motor 11. The power socket 16 is used to receive external current and transmit the current to the motor 11 and the control system. The exhaust fan is powered through the power socket 16. When the exhaust fan needs to be replaced, simply unplug the wire from the power socket 16, which is very simple and convenient.

[0038] like Figures 1-4 As shown, an anemometer 3 is installed on the outer casing 1, and the anemometer 3 is electrically connected to the control system. The anemometer 3 feeds back the measured data to the control system. When the wind speed is too low, the control system determines that there is a fault, then stops the machine and remotely alerts external personnel to carry out maintenance.

[0039] like Figures 1-4 As shown, a thermometer is installed inside the motor 11, and the thermometer is electrically connected to the control system. The thermometer is used to detect the internal temperature of the motor 11. When an excessively high temperature is detected, the control system determines that a fault has occurred, and then stops the motor and remotely alerts external personnel to carry out maintenance.

[0040] like Figures 1-4 As shown, the new type of mining ventilation unit also includes a fuse, which is used to protect the circuit and is electrically connected to the control system. When the current is overloaded, the fuse blows, the control system determines that there is a fault, and then stops the machine and remotely alerts external personnel to carry out maintenance.

[0041] Working principle: When the exhaust fan is stopped, the coil spring applies pressure to the blades 2, making the blades 2 perpendicular to the top surface of the outer casing 1. When the exhaust fan is started, the motor 11 drives the rotor 12 to rotate, thereby causing the blades 2 to rotate. Since the connection between the blades 2 and the rotor 12 is located in the lower middle part of the blades 2, the wind resistance on the upper part of the blades 2 is greater than that on the lower part. Therefore, the blades 2 will rotate until they reach their maximum angle. Because the blades 2 have rotated a certain angle, when the rotor 12 rotates, the blades 2 will generate wind force.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel exhaust fan unit for mining, comprising two exhaust fans arranged one behind the other as backups for each other; characterized in that: The exhaust fan includes an outer casing (1) and blades (2). An electric motor (11) is located at the center of the outer casing (1). The electric motor (11) is fixedly connected to the outer casing (1). The rotor of the electric motor (11) is fixedly connected to a rotating head (12). Several blades (2) are rotatably connected to the side of the rotating head (12). The connection between the blades (2) and the rotating head (12) is located in the lower middle part of the blades (2). A coil spring is provided inside the connection between the rotating head (12) and the blades (2). The coil spring is used to make the blades (2) align with the wind direction. The rotation range of the blades (2) is 0 to 60°. The motors (11) of both exhaust fans are electrically connected to the control system, which is used to receive signals, control the exhaust fans to turn on and off, and output signals to the outside world.

2. The new type of mining ventilation unit according to claim 1, characterized in that: The outer casing (1) has several slide rails (14) on its side and bottom surfaces, and several slide grooves (13) on its top surface. The slide rails (14) and slide grooves (13) are shaped to match each other and are used for sliding connection between the two exhaust fans and the surrounding walls.

3. A novel mining ventilation unit according to claim 2, characterized in that: The outer casing (1) is provided with a handle (15) on the front, which is used to allow the operator to directly pull the exhaust fan.

4. A novel mining ventilation unit according to claim 3, characterized in that: The outer casing (1) has a power socket (16) on its front side. The power socket (16) is electrically connected to the control system and the motor (11). The power socket (16) is used to receive external current and transmit the current to the motor (11) and the control system.

5. A novel mining ventilation unit according to claim 4, characterized in that: An anemometer (3) is installed on the outer casing (1), and the anemometer (3) is electrically connected to the control system.

6. A novel mining ventilation unit according to claim 5, characterized in that: A thermometer is installed inside the motor (11), and the thermometer is electrically connected to the control system.

7. A novel mining ventilation unit according to claim 6, characterized in that: The new type of mining ventilation unit also includes a fuse, which is used to protect the circuit and is electrically connected to the control system.

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