Piezoelectric energy conversion power supply device for rail transit passenger room power supply

Abstract

This utility model discloses a piezoelectric energy conversion power supply device for powering passenger compartments in rail transit, relating to the field of rail transit technology. The device includes a top cover, a bottom shell, and piezoelectric ceramics. Several mounting cylinders are fixedly connected to the inner bottom wall of the bottom shell, and the top cover is connected to the mounting cylinders via several mounting screws. Four circumferentially distributed limiting blocks are fixedly connected to the inner bottom wall of the bottom shell, and the piezoelectric ceramics are slidably disposed within the four limiting blocks. This utility model utilizes the piezoelectric effect of the piezoelectric ceramics to convert the mechanical energy generated by passengers stepping on the passenger compartment floor into electrical energy, which is then stored in an energy storage battery through a full-bridge rectifier circuit and converter in electronic components. The stored electrical energy can be used to power indicator lights, displays, and other equipment in the carriage, achieving effective recovery and utilization of previously wasted mechanical energy and saving energy in the train's main power supply network.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically a piezoelectric energy conversion power supply device for powering passenger compartments in rail transit. Background Technology

[0002] In modern rail transit, the power supply system inside passenger compartments typically relies on the train's main power supply network, which primarily provides power for equipment such as lighting, ventilation, and displays within the carriages. However, with the continuous development of rail transit, the types and number of electrical devices inside passenger compartments are gradually increasing, leading to a growing demand for electricity, which to some extent increases the load on the main power supply network.

[0003] During train operation, the movement and trampling of passengers inside the passenger compartment generate a large amount of energy, which is often wasted as a result of ineffective utilization.

[0004] Based on this, a piezoelectric energy conversion power supply device for powering passenger compartments in rail transit is now provided. Utility Model Content

[0005] The purpose of this invention is to provide a piezoelectric energy conversion power supply device for power supply in passenger compartments of rail transit, in order to solve the problem in the background art that a large amount of energy is generated by passengers walking and stepping in the passenger compartment during train operation, and this energy is often wasted because it is not effectively utilized.

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

[0007] A piezoelectric energy conversion power supply device for powering passenger compartments in rail transit includes a top cover, a bottom shell, and a piezoelectric ceramic. Several mounting cylinders are fixedly connected to the bottom wall of the bottom shell. The top cover is connected to the mounting cylinders by several mounting screws. Four circumferentially distributed limiting blocks are fixedly connected to the bottom wall of the bottom shell. The piezoelectric ceramic is slidably disposed within the four limiting blocks.

[0008] The top cover has a tread block groove, and a tread block is slidably connected to the inner side wall of the tread block groove. A fixing cylinder is fixedly connected to the lower surface of the top cover, and an impact block is provided inside the fixing cylinder. The impact block abuts against the piezoelectric ceramic. Electronic components are provided inside the bottom shell, and the piezoelectric ceramic is electrically connected to the electronic components.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative: the fixed cylinder is provided with threads on its periphery, the fixed cylinder is threadedly connected to a threaded cap, the impact block is fixedly connected to a sliding ring on its periphery, the sliding ring is slidably connected to the inner wall of the fixed cylinder, and the impact block is slidably connected to the threaded cap through it.

[0011] In one alternative: a spring is fixedly connected between the step block and the inner wall of the step block groove.

[0012] In one alternative: a spring is provided between the threaded cap and the sliding ring.

[0013] In one alternative: a support plate is slidably disposed within the four limiting blocks, the support plate being located below the piezoelectric ceramic.

[0014] In one alternative: two symmetrical fixed seats are fixedly connected to the bottom wall of the inner shell. The fixed seats are connected to a rotating shaft via bearings. A ceramic positioning rod is fixedly connected to the rotating shaft. One end of the ceramic positioning rod abuts against the piezoelectric ceramic, and the other end is fixedly connected to a pressing rod. A coil spring is provided between the rotating shaft and the fixed seat.

[0015] In one alternative: the electronic components include a full-bridge rectifier circuit, a converter, and an energy storage battery.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This invention utilizes the piezoelectric effect of piezoelectric ceramics to convert the mechanical energy generated by passengers stepping on the passenger compartment floor into electrical energy, which is then stored in an energy storage battery through a full-bridge rectifier circuit and converter in electronic components. The stored electrical energy can be used to power indicator lights, displays, and other equipment in the carriage, achieving effective recovery and utilization of mechanical energy that would otherwise be wasted, and saving energy in the train's main power supply network.

[0018] 2. The impact block of this utility model is connected to the fixed cylinder through a threaded cover. When the impact block needs to be maintained or replaced, the threaded cover can be rotated to release the lock, the impact block can be taken out for replacement, and then the threaded cover can be tightened again. The maintenance process is simple and quick.

[0019] 3. The ceramic positioning rod of this utility model abuts against the piezoelectric ceramic under the action of the coil spring, which can position the piezoelectric ceramic. At the same time, when it is necessary to replace the piezoelectric ceramic, pressing the pressing rod can release the positioning, making the replacement convenient and quick and ensuring the normal working condition of the piezoelectric ceramic.

[0020] 4. Springs are provided between the step block and the inner wall of the step block groove, as well as between the threaded cover and the sliding ring, in this utility model. These springs can play a buffering role during the movement of the step block and the impact block, reduce rigid collisions between parts, and extend the service life of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a first-view diagram of the present invention.

[0023] Figure 3 This is a disassembly diagram of the present invention.

[0024] Figure 4 This is a partial cross-sectional schematic diagram of the present invention.

[0025] Figure label annotations: 1 Top cover, 2 Bottom shell, 3 Step block, 4 Mounting screw, 5 Mounting cylinder, 6 Electronic component, 7 Piezoelectric ceramic, 8 Limiting block, 9 Support plate, 10 Fixing seat, 11 Ceramic positioning rod, 12 Pressing rod, 13 Rotating shaft, 14 Impact block, 15 Fixing cylinder, 16 Threaded cover, 17 Sliding ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] In one embodiment, such as Figures 1-4 As shown, a piezoelectric energy conversion power supply device for power supply of passenger compartment in rail transit includes a top cover 1, a bottom shell 2, and a piezoelectric ceramic 7. Several mounting cylinders 5 are fixedly connected to the bottom wall of the bottom shell 2. The top cover 1 is connected to the mounting cylinders 5 by several mounting screws 4. Four circumferentially distributed limiting blocks 8 are fixedly connected to the bottom wall of the bottom shell 2. The piezoelectric ceramic 7 is slidably disposed in the four limiting blocks 8.

[0028] The top cover 1 has a foot block groove, and a foot block 3 is slidably connected to the inner side wall of the foot block groove. A fixing cylinder 15 is fixedly connected to the lower surface of the top cover 1. An impact block 14 is provided inside the fixing cylinder 15. The impact block 14 abuts against the piezoelectric ceramic 7. An electronic component 6 is provided inside the bottom shell 2. The piezoelectric ceramic 7 is electrically connected to the electronic component 6.

[0029] The device is placed under the floor of the subway passenger compartment. When a passenger steps on the floor of the subway passenger compartment, the floor will deform slightly, causing the stepping block 3 to fall. The stepping block 3 falls and hits the impact block 14, which in turn falls and hits the piezoelectric ceramic 7. When the piezoelectric ceramic 7 is subjected to mechanical pressure transmitted from the impact block 14, the electric dipole inside it will be polarized based on the piezoelectric effect, resulting in bound charges of opposite signs on the two ends of the surface, thereby converting mechanical energy into electrical energy. The generated electrical energy is stored in the energy storage battery through a full-bridge rectifier circuit and a DC-DC converter. The electrical energy in the energy storage battery can be used to power the indicator lights in the car or charge the display, realizing the effective conversion and utilization of mechanical energy into electrical energy.

[0030] In one embodiment, the fixed cylinder 15 is provided with threads on its periphery, and the fixed cylinder 15 is threadedly connected to a threaded cap 16. The impact block 14 is fixedly connected to a sliding ring 17 on its periphery. The sliding ring 17 is slidably connected to the inner wall of the fixed cylinder 15, and the impact block 14 is slidably connected to the threaded cap 16 through it.

[0031] When the device needs to be disassembled for maintenance after a long period of time, the mounting screws 4 can be removed first, and then the top cover 1 and the bottom shell 2 can be separated. When the impact block 14 needs to be maintained or replaced, the threaded cover 16 can be rotated first to release the thread lock between the threaded cover 16 and the fixed cylinder 15, and then the impact block 14 can be removed to complete the disassembly and replacement. To replace it, simply rotate and tighten the threaded cover 16 and the fixed cylinder 15 again. The operation is simple and quick.

[0032] In one embodiment, a spring is fixedly connected between the foot block 3 and the inner wall of the foot block groove.

[0033] In one embodiment, a spring is provided between the threaded cap 16 and the sliding ring 17.

[0034] Springs are installed between the step block and the inner wall of the step block groove, as well as between the threaded cover and the sliding ring. These springs can buffer the movement of the step block and the impact block, reduce rigid collisions between parts, and extend the service life of the device.

[0035] In one embodiment, a support plate 9 is slidably disposed within the four limiting blocks 8, and the support plate 9 is located below the piezoelectric ceramic 7. The piezoelectric ceramic 7 can be lifted by the support plate 9, making it easy to remove the piezoelectric ceramic 7 from the four limiting blocks 8.

[0036] In one embodiment, two symmetrical fixed seats 10 are fixedly connected to the inner bottom wall of the bottom shell 2. The fixed seats 10 are connected to a rotating shaft 13 via bearings. A ceramic positioning rod 11 is fixedly connected to the rotating shaft 13. One end of the ceramic positioning rod 11 abuts against the piezoelectric ceramic 7, and the other end is fixedly connected to a pressing rod 12. A coil spring is provided between the rotating shaft 13 and the fixed seat 10.

[0037] When the piezoelectric ceramic 7 needs to be replaced, simply press the two pressing rods 12 with two fingers of one hand. The two pressing rods 12 drive the ceramic positioning rod 11 to rotate, releasing the limit on the piezoelectric ceramic 7 and removing the piezoelectric ceramic 7 from the four limit blocks 8. Then, subsequent replacement and maintenance can be carried out. The operation is quick and convenient.

[0038] After placing the new piezoelectric ceramic 7 into the limiting block 8, release the two fingers. The ceramic positioning rod 11 will reset under the action of the coil spring, thus completing the limiting of the piezoelectric ceramic 7.

[0039] In one embodiment, electronic component 6 includes a full-bridge rectifier circuit, a converter, and an energy storage battery.

[0040] The above embodiments disclose a piezoelectric energy conversion power supply device for powering passenger compartments in rail transit. Its specific working principle and process are as follows:

[0041] S1: The device is placed under the floor of the subway passenger compartment. When a passenger steps on the floor of the subway passenger compartment, the floor will deform slightly, causing the stepping block 3 to fall. The stepping block 3 falls and hits the impact block 14, which in turn causes the impact block 14 to fall and hit the piezoelectric ceramic 7. When the piezoelectric ceramic 7 is subjected to mechanical pressure transmitted from the impact block 14, the electric dipole inside it is polarized based on the piezoelectric effect, resulting in bound charges with opposite signs on the two ends of the surface, thereby converting mechanical energy into electrical energy. The generated electrical energy is stored in the energy storage battery through a full-bridge rectifier circuit and a DC-DC converter. The electrical energy in the energy storage battery can be used to power the indicator lights in the car or to charge the display, realizing the effective conversion and utilization of mechanical energy into electrical energy.

[0042] S2: When the device needs to be disassembled for maintenance after a long period of time, the mounting screws 4 can be removed first, and then the top cover 1 and the bottom shell 2 can be separated. When the impact block 14 needs to be maintained or replaced, the threaded cover 16 can be rotated first to release the thread lock between the threaded cover 16 and the fixed cylinder 15, and then the impact block 14 can be taken out to complete the disassembly and replacement. To replace it, simply rotate and tighten the threaded cover 16 and the fixed cylinder 15 again. The operation is simple and quick.

[0043] S3: When it is necessary to replace the piezoelectric ceramic 7, simply press the two pressing rods 12 with two fingers of one hand. The two pressing rods 12 drive the ceramic positioning rod 11 to rotate, releasing the limit on the piezoelectric ceramic 7. Then, lift the piezoelectric ceramic 7 with the support plate 9 to easily remove the piezoelectric ceramic 7 from the four limit blocks 8. After that, subsequent replacement and maintenance can be carried out. The operation is quick and convenient.

[0044] After placing the new piezoelectric ceramic 7 into the limiting block 8, release the two fingers. The ceramic positioning rod 11 will reset under the action of the coil spring, thus completing the limiting of the piezoelectric ceramic 7.

[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A piezoelectric energy conversion power supply device for power supply of a rail transit passenger compartment, characterized in that, The device includes a top cover (1), a bottom shell (2), and a piezoelectric ceramic (7). The bottom wall of the bottom shell (2) is fixedly connected to several mounting cylinders (5). The top cover (1) is connected to the mounting cylinders (5) by several mounting screws (4). The bottom wall of the bottom shell (2) is fixedly connected to four circumferentially distributed limiting blocks (8). The piezoelectric ceramic (7) is slidably disposed in the four limiting blocks (8). The top cover (1) has a step block groove, and a step block (3) is slidably connected to the inner side wall of the step block groove. A fixing cylinder (15) is fixedly connected to the lower surface of the top cover (1). An impact block (14) is provided inside the fixing cylinder (15). The impact block (14) abuts against the piezoelectric ceramic (7). An electronic component (6) is provided inside the bottom shell (2). The piezoelectric ceramic (7) is electrically connected to the electronic component (6).

2. The piezoelectric energy conversion power supply device for power supply in passenger compartments of rail transit according to claim 1, characterized in that, The fixed cylinder (15) is provided with threads on its periphery, and the fixed cylinder (15) is threadedly connected to a threaded cap (16). The impact block (14) is fixedly connected to a sliding ring (17) on its periphery. The sliding ring (17) is slidably connected to the inner wall of the fixed cylinder (15), and the impact block (14) is slidably connected to the threaded cap (16) through it.

3. A piezoelectric energy conversion power supply device for powering passenger compartments in rail transit according to claim 1, characterized in that, A spring is fixedly connected between the step block (3) and the inner wall of the step block groove.

4. A piezoelectric energy conversion power supply device for powering passenger compartments in rail transit according to claim 2, characterized in that, A spring is provided between the threaded cap (16) and the sliding ring (17).

5. A piezoelectric energy conversion power supply device for powering passenger compartments in rail transit according to claim 1, characterized in that, A support plate (9) is slidably disposed within the four limiting blocks (8), and the support plate (9) is located below the piezoelectric ceramic (7).

6. A piezoelectric energy conversion power supply device for powering passenger compartments in rail transit according to claim 2, characterized in that, The bottom wall of the bottom shell (2) is fixedly connected to two symmetrical fixed seats (10). The fixed seats (10) are connected to a rotating shaft (13) through a bearing. The rotating shaft (13) is fixedly connected to a ceramic positioning rod (11). One end of the ceramic positioning rod (11) abuts against the piezoelectric ceramic (7), and the other end is fixedly connected to a pressing rod (12). A coil spring is provided between the rotating shaft (13) and the fixed seat (10).

7. A piezoelectric energy conversion power supply device for powering passenger compartments in rail transit according to claim 1, characterized in that, The electronic component (6) includes a full-bridge rectifier circuit, a converter, and an energy storage battery.

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