A power generation device and a power generation method for use in a railway tunnel

Abstract

This invention discloses a power generation device and method for use in railway tunnels. The device includes several piezoelectric modules for wind power generation, which are adjustable in angle and attached to the inner wall of the railway tunnel. The piezoelectric modules are electrically connected to a voltage-stabilized energy storage module. Each piezoelectric module includes a mounting base with its back attached to the inner wall of the railway tunnel. A piezoelectric ceramic plate for wind power generation is fixed to the front of the mounting base in a flip-out manner. The piezoelectric ceramic plate is electrically connected to the voltage-stabilized energy storage module. The method involves installing the power generation device described above, and includes a speedometer to acquire the train's speed entering the tunnel, and a main unit driving the piezoelectric ceramic plate to flip according to the train's speed entering the tunnel. When the train travels in the tunnel, it generates piston wind. By installing the piezoelectric modules on the inner wall of the tunnel, the piston wind compresses the piezoelectric modules, thereby generating electrical energy. The generated electrical energy is stored through the voltage-stabilized energy storage module and supplied to external electrical appliances.

Description

Technical Field

[0001] This invention relates primarily to the field of power generation technology, and more particularly to a power generation device and method for use in railway tunnels. Background Technology

[0002] When a train travels through a tunnel, the air in the tunnel is drawn in by the train and flows in the direction of its movement, creating piston wind. Piston wind possesses energy, but in current technology, this energy is not fully utilized. Therefore, how to convert the energy of piston wind into electrical energy and apply it has become an urgent technical problem to be solved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a power generation device and power generation method for use in railway tunnels.

[0004] To address the aforementioned technical problems, this invention first discloses a power generation device for use in railway tunnels: comprising several piezoelectric modules for wind power generation that are adjustablely mounted on the inner wall of the railway tunnel, wherein the piezoelectric modules are electrically connected to a voltage-stabilized energy storage module; the piezoelectric module includes a mounting base whose back is attached to the inner wall of the railway tunnel, and a piezoelectric ceramic plate for wind power generation is fixedly fixed to the front of the mounting base in a flip-out manner, wherein the piezoelectric ceramic plate is electrically connected to the voltage-stabilized energy storage module.

[0005] As a further improvement to the above technical solution:

[0006] The mounting base includes a base whose back is attached to the inner wall of the railway tunnel. The front of the base is hinged with two pairs of swing arms for reverse pushing the piezoelectric ceramic plate to flip. The end of the swing arm away from the base is hinged to the back of the piezoelectric ceramic plate.

[0007] The base has a built-in motor for driving the swing arm to rotate, and the output shaft of the motor is connected to the swing arm.

[0008] The piezoelectric ceramic plate has an adjustable flip angle, and its flip axis is perpendicular to the tunnel extension direction.

[0009] Lighting panels are installed on both sides of the piezoelectric ceramic plate along the length of the tunnel.

[0010] The power generation device also includes a control module for adjusting the flip angle of the piezoelectric ceramic plate, and the control module is signal-connected to the mounting base.

[0011] The control module includes a speedometer and a main unit; the speedometer is installed at the tunnel entrance; the main unit is connected to the speedometer and the mounting base respectively for driving the piezoelectric ceramic plate to rotate.

[0012] To address the aforementioned technical problems, the present invention also discloses a method for generating electricity in railway tunnels: a power generation device equipped with any of the above-mentioned features is installed, and the method includes the following steps:

[0013] Step S1: The speedometer acquires the train's speed v as it enters the tunnel;

[0014] In step S2, the host drives the piezoelectric ceramic plate to flip according to the speed at which the train enters the tunnel.

[0015] As a further improvement to the above technical solution:

[0016] The method for generating electricity in railway tunnels also includes:

[0017] Step S3: When the piezoelectric ceramic plate flips, the lighting plate located at one end along the train's direction of travel is turned on; the angle r formed by the illumination direction of the lighting plate and the train's direction of travel is an acute angle.

[0018] When 0 km / h < v ≤ 100 km / h, the flip angle of the piezoelectric ceramic plate is 2°; when 100 km / h < v ≤ 200 km / h, the flip angle of the piezoelectric ceramic plate is 5°; when v > 200 km / h, the flip angle of the piezoelectric ceramic plate is 8°; and the angle R between the positive direction of the piezoelectric ceramic plate in the flipped state and the direction of train travel is an obtuse angle.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] When a train travels through a tunnel, the air inside the tunnel is propelled by the train and flows in the direction of its movement, creating a piston-like airflow. By installing piezoelectric modules on the tunnel walls, this piston-like airflow compresses the piezoelectric modules, generating electrical energy. This electrical energy is stored through a voltage-stabilized energy storage module electrically connected to the piezoelectric modules. The voltage-stabilized energy storage module includes a filter rectifier and a battery, and it is electrically connected to external electrical appliances to provide power. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the installation of the power generation unit;

[0022] Figure 2 This is a schematic diagram of the piezoelectric module (in its unflipped state);

[0023] Figure 3 This is a structural diagram of a piezoelectric module (in a flipped state).

[0024] Figure 4 This is a schematic diagram showing the relationship between the piezoelectric ceramic plate and the direction of train travel.

[0025] The labels in the diagram represent: 1. Piezoelectric module; 11. Mounting bracket; 111. Base; 112. Swing arm; 113. Motor; 12. Piezoelectric ceramic plate; 13. Lighting board; 2. Voltage stabilizer and energy storage module; 3. Control module; 31. Speedometer; 32. Main unit. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 4 As shown, the power generation device for railway tunnels in this embodiment includes several piezoelectric modules 1 with adjustable tilt angles, attached to the inner wall of the railway tunnel for wind power generation. The piezoelectric modules 1 are electrically connected to voltage-stabilized energy storage modules 2. Each piezoelectric module 1 includes a mounting base 11 with its back side attached to the inner wall of the railway tunnel. A piezoelectric ceramic plate 12 for wind power generation is fixed to the front side of the mounting base 11, and the piezoelectric ceramic plate 12 is electrically connected to the voltage-stabilized energy storage modules 2. When a train travels through the tunnel, the air in the tunnel is propelled by the train and flows in the direction of travel, generating a piston-like airflow. By installing the piezoelectric modules 1 on the inner wall of the tunnel, this piston-like airflow compresses the piezoelectric modules 1, generating electrical energy. This electrical energy is stored through the voltage-stabilized energy storage modules 2, which are electrically connected to the piezoelectric modules 1. The voltage-stabilized energy storage module 2 includes a filter rectifier and a battery, and is electrically connected to external electrical appliances to provide power. Preferably, the battery in the voltage-stabilized energy storage module 2 is also connected to an external power source. The external power source can actively charge the battery when its power is insufficient, thereby ensuring a stable and continuous power supply even when the power generated by the piezoelectric module 1 is insufficient. Meanwhile, since the direction of the piston wind is roughly the same as the train's direction of travel, in order to enhance the compression of the piezoelectric ceramic plate 12 by the piston wind and generate more power, a flip-connection structure is set between the piezoelectric ceramic plate 12 and the mounting base 11. This allows the tilt angle of the piezoelectric ceramic plate 12 to be adjusted according to the wind direction to obtain a better compression effect.

[0028] Preferably, the back of the base 111 is arc-shaped, and its curvature matches the curvature of the tunnel inner wall. Since tunnels are typically designed as arched structures with arc-shaped inner walls, to facilitate the fit between the piezoelectric module 1 and the tunnel inner wall and enhance the connection strength, the base 111 is designed with an arc-shaped interior for contact with the tunnel inner wall, and the curvature of the base 111 matches the curvature of the tunnel inner wall, thus achieving a perfect fit. Furthermore, the base 111 can be connected to the tunnel inner wall by bolts or adhesive. Even further, the base 111 has grooves for threading electrical wires.

[0029] In this embodiment, the mounting base 11 includes a base 111 whose back side is attached to the inner wall of the railway tunnel. Two pairs of swing arms 112 are hinged to the front of the base 111 for reverse-push rotation of the piezoelectric ceramic plate 12. The end of each swing arm 112 away from the base 111 is hinged to the back side of the piezoelectric ceramic plate 12. The rotation angle of the piezoelectric ceramic plate 12 is adjustable, and its rotation axis is perpendicular to the tunnel extension direction. The base 111 contains a motor 113 for driving the rotation of the swing arms 112, and the output shaft of the motor 113 is connected to the swing arms 112. Each piezoelectric module 1 may include two motors 113, which drive the rotation of the two swing arms 112 respectively. The swing arms 112 are telescopic structures; by changing the tilt angle of the two swing arms 112, the tilt angle of the piezoelectric ceramic plate 12 can be controlled.

[0030] In this embodiment, lighting panels 13 are installed on both sides of the piezoelectric ceramic plate 12 along the length of the tunnel. By installing lighting panels 13 on both sides of the piezoelectric ceramic plate 12, lighting can be provided inside the tunnel. At the same time, the lighting panels 13 can rotate with the piezoelectric ceramic plate 12 to change the lighting angle.

[0031] In this embodiment, the power generation device also includes a control module 3 for adjusting the flip angle of the piezoelectric ceramic plate 12. The control module 3 is signal-connected to the mounting base 11. The train's direction and speed affect the direction of the piston wind. By setting up the control module, it can adjust the flip angle of the piezoelectric ceramic plate 12 by acquiring the train's travel information (direction and speed), thereby obtaining more power generation. Specifically, the control module 3 includes a speedometer 31 and a host 32. The speedometer 31 is installed at the tunnel entrance. The host 32 is signal-connected to both the speedometer 31 and the mounting base 11 and is used to drive the piezoelectric ceramic plate 12 to flip. By setting the speedometer 31, the speed of the train entering the tunnel can be obtained and transmitted to the host 32. The host sends a command to the mounting base 11 based on the received speed information. The mounting base 11 starts the motor 113 according to the command to drive the piezoelectric ceramic plate 12 to flip by a preset angle.

[0032] Preferably, the voltage-stabilized energy storage module 2 is electrically connected to the motor 113 and the lighting board 13 respectively, and uses the electrical energy generated by the piezoelectric ceramic plate 12 to drive the motor 113 and the lighting board 13 to work, realizing internal circulation. At the same time, the remaining power supplies other electrical appliances.

[0033] Then, the present invention discloses a method for generating electricity in a railway tunnel, wherein in one embodiment, a power generation device according to any of the above claims is installed, and the method includes the following steps:

[0034] Step S1: The speedometer 31 acquires the train's speed v as it enters the tunnel;

[0035] In step S2, the host 32 drives the piezoelectric ceramic plate 12 to flip according to the speed of the train entering the tunnel.

[0036] Trains traveling in different directions and / or at different speeds generate different directions of piston wind within the tunnel. The larger the angle between the direction of the piston wind and the direction directly opposite the piezoelectric ceramic plate 12, the more pronounced the compression effect, thus generating more electricity. Therefore, the speedometer 31 first acquires the train's tunnel entry speed v, which includes both direction and magnitude. The main unit controls the piezoelectric ceramic plate 12 to rotate based on the acquired tunnel speed v, thereby achieving greater compression and improving power generation efficiency.

[0037] In this embodiment, the power generation method for railway tunnels further includes:

[0038] In step S3, when the piezoelectric ceramic plate 12 flips, the lighting plate 13 located at the end along the train's direction of travel is turned on; the angle r formed by the illumination direction of the lighting plate 13 and the train's direction of travel is an acute angle. The lighting plate 13 is installed on the side of the piezoelectric ceramic plate 12. When the piezoelectric ceramic plate 12 flips, the lighting plate 13 will also flip, thereby changing the illumination angle. When the speedometer 31 obtains the train's speed, the main unit 32 sends a specified drive to flip the piezoelectric ceramic plate 12. At this time, the lighting plate 13 rotates accordingly, and only the lighting plate 13 at the end along the train's direction of travel is turned on. That is to say, at this time, the illumination direction of the lighting plate 13 is basically consistent with the train's direction of travel, thereby avoiding direct illumination of the driver's eyes.

[0039] In this embodiment, when 0 km / h < v ≤ 100 km / h, the flip angle of the piezoelectric ceramic plate 12 is 2°; when 100 km / h < v ≤ 200 km / h, the flip angle of the piezoelectric ceramic plate 12 is 5°; and when v > 200 km / h, the flip angle of the piezoelectric ceramic plate 12 is 8°. Furthermore, the angle R between the positive direction of the flipped piezoelectric ceramic plate 12 and the train's direction of travel is an obtuse angle. Calculations show that the higher the train speed, the smaller the angle between the piston wind direction and the train's direction of travel. This means that the piezoelectric ceramic plate 12 must flip at a greater angle to achieve greater compression. To achieve this effect, the train speed is divided into three segments: 0 km / h < v ≤ 100 km / h, 100 km / h < v ≤ 200 km / h, and v > 200 km / h. The flip angle of the piezoelectric ceramic plate 12 is then adjusted accordingly to effectively improve power generation efficiency. The flip angle of the piezoelectric ceramic plate 12 refers to the angle between the piezoelectric ceramic plate and the base 111.

[0040] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A power generation device for use in railway tunnels, characterized in that, The device includes several piezoelectric modules (1) that are adjustable in tilt and attached to the inner wall of a railway tunnel for wind power generation. The piezoelectric modules (1) are electrically connected to a voltage-stabilized energy storage module (2). The piezoelectric modules (1) include a mounting base (11) with its back attached to the inner wall of the railway tunnel. The front of the mounting base (11) is rotatably fixed with a piezoelectric ceramic plate (12) for wind power generation. The piezoelectric ceramic plate (12) is electrically connected to the voltage-stabilized energy storage module (2). The piezoelectric ceramic plate (12) is equipped with lighting plates (13) on both sides along the tunnel length direction; the angle r between the illumination direction of the lighting plate (13) and the train travel direction is an acute angle. The power generation device also includes a control module (3) for adjusting the flip angle of the piezoelectric ceramic plate (12), and the control module (3) is signal connected to the mounting base (11); The control module (3) includes a speedometer (31) and a host (32); the speedometer (31) is installed at the tunnel entrance; the host (32) is connected to the speedometer (31) and the mounting base (11) respectively, and is used to drive the piezoelectric ceramic plate (12) to rotate.

2. The power generation device for railway tunnels according to claim 1, characterized in that: The mounting base (11) includes a base (111) whose back is attached to the inner wall of the railway tunnel. The base (111) has two pairs of swing arms (112) hinged to its front for reverse pushing the piezoelectric ceramic plate (12) to flip. The end of the swing arm (112) away from the base (111) is hinged to the back of the piezoelectric ceramic plate (12).

3. The power generation device for railway tunnels according to claim 2, characterized in that: The base (111) has a built-in motor (113) for driving the swing arm (112) to rotate, and the output shaft of the motor (113) is connected to the swing arm (112).

4. The power generation device for railway tunnels according to claim 1, characterized in that: The piezoelectric ceramic plate (12) has an adjustable flip angle, and its flip axis is perpendicular to the tunnel extension direction.

5. A method for generating electricity in railway tunnels, characterized in that, The device is equipped with any one of claims 1-4 and includes the following steps: Step S1, the speedometer (31) obtains the train's speed v as it enters the tunnel; In step S2, the host (32) drives the piezoelectric ceramic plate (12) to flip according to the speed of the train entering the tunnel.

6. The method for generating electricity in a railway tunnel according to claim 5, characterized in that: The method for generating electricity in railway tunnels also includes: In step S3, when the piezoelectric ceramic plate (12) is flipped, the lighting plate (13) located at one end along the train travel direction is turned on.

7. The method for generating electricity in a railway tunnel according to claim 5, characterized in that: When 0 km / h < v ≤ 100 km / h, the flip angle of the piezoelectric ceramic plate (12) is 2°; when 100 km / h < v ≤ 200 km / h, the flip angle of the piezoelectric ceramic plate (12) is 5°; when v > 200 km / h, the flip angle of the piezoelectric ceramic plate (12) is 8°; and the angle R between the positive direction of the piezoelectric ceramic plate (12) in the flipped state and the direction of train travel is an obtuse angle.

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