A photovoltaic power generation device based on Fresnel lens condensation and a Fresnel lens

Abstract

The application belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic power generation device based on Fresnel lens condensation and a Fresnel lens. In view of the problem that in the prior art, the thermoelectric power generation is prone to damage of the thermoelectric power generation sheet due to instability of a heat source, the following scheme is proposed, which comprises an installation base in a whole barrel-shaped structure with an opening downward, a support pipe column rotatably connected to the middle part of the upper surface of the installation base, a cantilever beam fixed to the top end of the support pipe column and horizontally extending to the front, an arc-shaped fixed hanger fixed to one end of the cantilever beam away from the support pipe column, two horizontal bearing groups fixed to the two ends of the arc-shaped fixed hanger and symmetrical to each other with coinciding axial lines, and one same fixed outer frame rotatably connected between the two horizontal bearing groups. The application not only makes the final output voltage stable, but also does not affect the core power generation component regardless of the strength of external light, and the cost of the equipment and material part, i.e. water, is low.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic power generation device based on Fresnel lens focusing and a Fresnel lens. Background Technology

[0002] With the increasing global demand for clean energy, solar energy has become an important energy source. Traditional condenser lenses are usually heavy and bulky, while Fresnel lenses can reduce weight and effectively save space through their flat design, making them particularly suitable for applications in space-constrained locations.

[0003] A search revealed Chinese patent CN 214101212 U, which discloses a solar thermal thermoelectric power generation device. This device includes a Fresnel lens, a heat-conducting block located below the Fresnel lens, and a semiconductor thermoelectric generator. The high-temperature side of the semiconductor thermoelectric generator is in thermal contact with the heat-conducting block, and a heat dissipation unit is connected to the low-temperature side of the semiconductor thermoelectric generator. The Fresnel lens and the heat-conducting block are arranged with an adjustable spacing. It utilizes the Fresnel lens and the semiconductor thermoelectric generator for stable power generation. Although this device can focus some light to a certain extent onto the semiconductor thermoelectric generator, the Fresnel lens directly illuminates the generator. However, because the Fresnel lens directly shines the focused light onto the generator, changes in external light intensity can easily burn out the semiconductor thermoelectric generator, resulting in high replacement and maintenance costs. To address this issue, we propose a novel photovoltaic power generation device based on a Fresnel lens for light concentration, along with the Fresnel lens itself. Summary of the Invention

[0004] To overcome the aforementioned shortcomings in the prior art, the present invention aims to provide a device capable of converting the heat energy generated after focusing into electrical energy through a stable thermoelectric conversion device.

[0005] This invention provides a photovoltaic power generation device based on Fresnel lens focusing, comprising a downward-opening, barrel-shaped mounting base. A support column is rotatably connected to the center of the upper surface of the mounting base. A horizontally extending cantilever beam is fixed to the top of the support column. An arched fixing bracket is fixed to the end of the cantilever beam away from the support column, with the opening of the arched fixing bracket facing downward. Symmetrical horizontal bearing assemblies with coincident axes are fixed to both ends of the arched fixing bracket. A common fixed outer frame is rotatably connected between the two horizontal bearing assemblies. The fixed outer frame is rectangular in shape, with one side coinciding with the rotation center. A lens body is embedded in the middle, and a support strip extending towards the focal point of the lens body is fixed in the middle of the lower surface of the fixed outer frame. A heating device is provided at the end of the upper surface of the support strip away from the fixed outer frame. The heating device includes a spherical water tank with an internal cavity and an integral spherical structure. A top cover is reserved at the top of the spherical water tank, and a steam exhaust pipe that bends horizontally away from the lens body is inserted into the top of the top cover. A U-shaped bracket is also fixed at the end of the support strip away from the fixed outer frame, and a turbine generator is fixed on the side of the U-shaped bracket away from the lens body. The outlet of the steam exhaust pipe is connected to the kinetic energy input end of the turbine generator through a hose.

[0006] A further feature of this invention is that a mounting hole is provided in the middle of the upper surface of the mounting base, and an anti-detachment bearing is embedded in the mounting hole. The support column is rotatably connected to the anti-detachment bearing. A servo motor is fixed near the middle of the lower surface of the mounting base, and a drive gear is fixed to the top of the output shaft of the servo motor. A driven gear ring that meshes with the drive gear is fixed to the outer circumference of the support column near its bottom end. An arc-shaped toothed rod is fixed to the top of the U-shaped bracket, and the center of the arc-shaped toothed rod falls on the axis of the two horizontal bearing assemblies. The outer arc side is pre-reserved with worm gear teeth. A servo motor 2 is fixed to the lower surface of the cantilever beam near the outer arc side of the arc-shaped gear. A worm gear that meshes with the worm gear teeth is fixed to the top of the output shaft of the servo motor 2. A controller that controls the running direction and speed of the servo motor 1 and servo motor 2 is also fixed on the mounting base. The swing angle of the lens body is between 30° and 60°. By programming the local solar trajectory with the angle of attack of the equipment and importing it into the controller, it is possible to control the light-facing surface of the lens body to always face the sunlight, thereby improving the light-gathering efficiency.

[0007] A further feature of this invention is that a support frame is fixed to the upper surface of the support strip below the spherical water tank, and symmetrical ear plates are fixed to the top of the support frame on both the left and right sides. A radial bearing is embedded at the top of each ear plate, and a coaxial side shaft is rotatably connected between the two radial bearings. The two side shafts are fixed to the outer wall of the spherical water tank. A counterweight ball is placed inside the spherical water tank, and a threaded interface adapted to the size of the top cover is reserved at the top of the spherical water tank. The top cover is sealed and screwed into the threaded interface. This ensures that the spherical water tank remains horizontal when the lens body is adjusted for elevation, thus preventing excessive fluctuations in the internal water level.

[0008] A further feature of this invention is that the spherical water tank has a insertion hole on the side facing the lens body, and a heat-conducting component is sealed and welded into the insertion hole. The heat-conducting component includes an annular component attached to the surface of the spherical water tank, and a heat-conducting conical tube welded in the middle of the annular component and extending into the interior of the spherical water tank. The focal point of the lens body falls inside the heat-conducting conical tube, and the opening of the heat-conducting conical tube faces the lens body. This allows heat to be transferred to the water inside the spherical water tank more quickly and efficiently during heat collection, thereby reducing heat loss and improving conversion efficiency.

[0009] A further feature of this invention is that the spherical water tank is connected to an external pipe near its bottom, and an L-shaped connecting pipe is connected to the opening of the external pipe. A damping thin tube is provided between the L-shaped connecting pipe and the external pipe. This not only ensures the continuity of the water level but also reduces the fluctuations in the liquid level pipe at the other end when the water level fluctuates in the spherical water tank, ensuring a smooth water level change. A vertical, upward-opening liquid level pipe is provided at the end of the L-shaped connecting pipe away from the spherical water tank. A floating block slides and floats inside the liquid level pipe, and a ring-shaped magnet is fixed to the upper surface of the floating block. A sliding ring attracted to the magnet is slidably fitted onto the outer circumference of the liquid level pipe, and multiple ball bearings are embedded in the inner circumference of the sliding ring. A metal spring is fixed to the bottom end of the sliding ring. A metal ring is fixed to the bottom of the liquid level tube, and the metal ring and the sliding ring are connected in series in the alarm circuit. A liquid replenishment tube is also provided on the top cover, and a water supply pipe is inserted into the liquid replenishment tube. A water tank is provided at the end of the lower surface of the cantilever beam away from the arched fixed hanger, and a water outlet is provided at the bottom of the water tank. A solenoid valve is provided at the water outlet, and the outlet of the solenoid valve is connected to the other end of the water supply pipe. The control switch of the solenoid valve is connected to the output terminal of the controller. When the water in the spherical water tank evaporates and falls below the alarm water level, it will cause the float to fall, and then the alarm circuit will be activated. At this time, the controller will start the solenoid valve to release water for a set time to replenish the water level in the spherical water tank. This cycle can keep the heating device working continuously.

[0010] A further feature of the present invention is that a horn-shaped light-concentrating cover is fixed on the side of the fixed outer frame near the heating device, and the small opening end of the light-concentrating cover is close to the heating device but does not contact the heating device.

[0011] A further feature of this invention is that the end of the cantilever beam away from the arched fixed hanger is fixed with wing rods extending obliquely to the rear on both the left and right sides, and the two wing rods and the cantilever beam form a "Y" shape. Both wing rods are channel steel structures with downward openings. A strip hole is opened in the middle of the end of each wing rod away from the cantilever beam, and a hanger seat is slidably inserted into the strip hole. A support plate is reserved at the bottom end of the hanger seat, and a counterweight is snapped onto the upper surface of the support plate. A screw rod is reserved at the top end of the hanger seat to pass through the strip hole, and two sets of opposing nuts are screwed onto the screw rod. The two sets of opposing nuts are located on the upper and lower sides of the strip hole, respectively, to fix the hanger seat to the wing rod.

[0012] A further feature of this invention is that the fixed outer frame includes an upper groove rod and a lower groove rod with opposite and parallel openings. Both ends of the upper groove rod and the lower groove rod are provided with protruding pins. Both ends of the upper groove rod and the lower groove rod are fixed with side guard rods. The lower groove rod has a drain trough near both ends on the side away from the support column. The bottom of the drain trough is flush with the light-facing surface of the lens body, which allows for the rapid discharge of wastewater during subsequent rinsing and cleaning, preventing sludge from accumulating at corners.

[0013] A further feature of this invention is that an extension plate is reserved at the end of the cantilever beam away from the arched fixed hanger, and a slot is opened in the middle of the end of the extension plate. The overall height of the water tank is higher than the height of the spherical water storage tank, and a filling pipe is reserved at the top of the water tank. The filling pipe is slidably connected in the slot, and a retaining ring is fixed on the outer circumference of the filling pipe above the slot, which makes the disassembly and installation of the water tank more convenient.

[0014] A Fresnel lens is used in a photovoltaic power generation device based on Fresnel lens focusing as described above. The lens body is rectangular in shape, with a Fresnel lens in the middle. The upper and lower sides of the lens body are reserved with snap-fit ​​ribs for installation. Convex lenses are reserved at the four corners of the lens body, and the focal point of the convex lens coincides with the focal point of the Fresnel lens.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. By setting up a power generation device consisting of a spherical water tank and a lens body, the heat accumulated by the lens body can be directly converted into electrical energy during thermoelectric conversion, thus avoiding unstable power generation. Instead, the water in the spherical water tank is first heated to boiling, and then steam and a turbine generator are used to generate electricity. This not only makes the final output voltage stable, but also does not affect the core power generation components regardless of the intensity of external light, and the cost of the consumable part of the equipment, namely water, is low.

[0017] 2. The spotlight not only provides insulation but also prevents birds or maintenance personnel from accidentally entering the spotlighted area and getting burned, thus providing a safety protection function.

[0018] 3. By installing a heat-conducting component that extends into the spherical water tank, heat can be transferred to the water inside the spherical water tank more quickly and efficiently during heat collection, thereby reducing heat loss and improving conversion efficiency.

[0019] 4. The damping capillary tube not only ensures the continuity of the water level, but also reduces the fluctuation of the water level in the spherical water tank on the other end of the liquid level tube, ensuring a smooth change in water level. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention;

[0021] Figure 2 This is a schematic diagram of the rear-side upward view of a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention;

[0022] Figure 3 This is a side view of a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention;

[0023] Figure 4 This is a top view of a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention;

[0024] Figure 5 This invention proposes a photovoltaic power generation device based on Fresnel lens focusing. Figure 4 Schematic diagram of the cross-sectional structure along line AA;

[0025] Figure 6 This is a side view of a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention after adjusting the elevation angle;

[0026] Figure 7 This is a schematic diagram of the overall structure of the heating device in a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention.

[0027] Figure 8 This is an overall cross-sectional view of the heating device in a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention;

[0028] Figure 9 This is an exploded view of the heating device in a photovoltaic power generation device based on Fresnel lens focusing proposed in this invention;

[0029] Figure 10 This invention presents a schematic diagram of the structure of a Fresnel lens.

[0030] In the diagram: 1. Mounting base; 2. Anti-detachment bearing; 3. Heating device; 301. Spherical water storage tank; 302. Steam exhaust pipe; 303. Top cover; 304. Liquid replenishment pipe; 305. Heat-conducting component; 306. Side shaft column; 307. Damping capillary tube; 308. L-shaped connecting pipe; 309. Metal ring 1; 3010. Liquid level pipe; 3011. Sliding ring; 3012. Counterweight ball; 3013. Magnet; 3014. Float block; 3015. Threaded interface; 4. Controller; 5. Turbine generator; 6. Worm gear; 7. Support column 8. Counterweight; 9. Water tank; 901. Solenoid valve; 902. Water pipe; 10. Hanger base; 11. Wing rod; 12. Cantilever beam; 13. Arc-shaped rack; 14. Arch-shaped fixed hanger; 15. Fixed outer frame; 151. Sewage trough; 16. Lens body; 161. Snap-fit ​​rib; 162. Convex lens; 17. Condenser cover; 18. Support plate strip; 181. U-shaped bracket; 19. Support frame; 20. Servo motor one; 21. Drive gear; 22. Driven gear ring; 23. Servo motor two; 24. Horizontal bearing assembly. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] In this embodiment, please refer to Figure 1-10This solution proposes a photovoltaic power generation device based on Fresnel lens focusing, which includes a downward-opening, barrel-shaped mounting base 1. A support column 7 is rotatably connected to the middle of the upper surface of the mounting base 1. A horizontally extending cantilever beam 12 is fixed to the top of the support column 7. An arched fixing bracket 14 is fixed to the end of the cantilever beam 12 away from the support column 7. The opening of the arched fixing bracket 14 faces downward. Horizontal bearing assemblies 24 that are symmetrical and coincident in axis are fixed to both ends of the arched fixing bracket 14. The two horizontal bearing assemblies 24 are rotatably connected to the same fixed outer frame 15. The fixed outer frame 15 is rectangular in shape, with one side coinciding with the rotation center. A lens body 16 is embedded in the middle of the fixed outer frame 15. Furthermore, a support strip 18 extending below the focal point of the lens body 16 is fixed in the middle of the lower surface of the fixed outer frame 15. A heating device 3 is provided at the end of the upper surface of the support strip 18 away from the fixed outer frame 15. The heating device 3 includes a spherical water tank 301 with an internal cavity and an overall spherical structure. A top cover 303 is reserved at the top of the spherical water tank 301. A steam exhaust pipe 302 that bends horizontally to the side away from the lens body 16 is inserted into the top of the top cover 303. A U-shaped bracket 181 is also fixed at the end of the support strip 18 away from the fixed outer frame 15. A turbine generator 5 is fixed on the side of the U-shaped bracket 181 away from the lens body 16. The outlet of the steam exhaust pipe 302 is connected to the kinetic energy input end of the turbine generator 5 through a hose.

[0033] Specifically, by setting up a power generation device consisting of a spherical water storage tank 301 and a lens body 16, the heat accumulated in the lens body 16 is not directly converted into electrical energy during thermoelectric conversion, thus avoiding unstable power generation. Instead, the water in the spherical water storage tank 301 is first heated to boiling, and then steam and turbine generator 5 are used to generate electricity. This not only makes the final output voltage stable, but also does not affect the core power generation components regardless of the intensity of external light, and the cost of consumable materials, namely water, is low.

[0034] Reference Figures 2-6A mounting hole is provided in the middle of the upper surface of the mounting base 1, and an anti-detachment bearing 2 is embedded in the mounting hole. The support column 7 is rotatably connected in the anti-detachment bearing 2. A servo motor 20 is fixed near the middle of the lower surface of the mounting base 1, and a drive gear 21 is fixed at the top of the output shaft of the servo motor 20. A driven gear ring 22 that meshes with the drive gear 21 is fixed near the bottom of the outer circumference of the support column 7. An arc-shaped toothed rod 13 is fixed at the top of the U-shaped bracket 181, and the center of the arc-shaped toothed rod 13 falls on the axis of the two horizontal bearing sets 24. The outer arc side of the arc-shaped toothed rod 13 The cantilever beam 12 has pre-reserved worm gear teeth. A servo motor 23 is fixed to the lower surface of the cantilever beam 12 near the outer arc side of the arc-shaped gear 13. A worm 6 that meshes with the worm gear teeth is fixed to the top of the output shaft of the servo motor 23. A controller 4 that controls the running direction and speed of the servo motor 10 and the servo motor 23 is also fixed on the mounting base 1. The swing angle of the lens body 16 is between 30° and 60°. By programming the local solar trajectory with the angle of attack of the equipment and importing it into the controller 4, it is possible to control the light-facing surface of the lens body 16 to always face the sunlight, thereby improving the light-gathering efficiency.

[0035] Reference Figure 3 , Figures 7-9 A support frame 19 is fixed to the upper surface of the support strip 18 below the spherical water tank 301. Symmetrical ear plates are fixed to the top of the support frame 19 on the left and right sides respectively. The top of each ear plate is fitted with a radial bearing, and a coaxial side shaft column 306 is rotatably connected between the two radial bearings. The two side shaft columns 306 are fixed to the outer side wall of the spherical water tank 301 respectively. A counterweight ball 3012 is placed inside the spherical water tank 301. A screw interface 3015 adapted to the size of the top cover 303 is reserved at the top of the spherical water tank 301. The top cover 303 is sealed and screwed into the screw interface 3015. With the counterweight ball 3012 and the support frame 19, the spherical water tank 301 can always be kept horizontal when the lens body 16 is adjusted at the elevation angle, so as not to cause too much fluctuation in the internal water level.

[0036] Reference Figure 3 , Figures 7-9 The spherical water tank 301 has an insertion hole on the side facing the lens body 16, and a heat-conducting component 305 is sealed and welded in the insertion hole. The heat-conducting component 305 includes an annular part attached to the surface of the spherical water tank 301, and a heat-conducting cone tube welded in the middle of the annular part and extending into the interior of the spherical water tank 301. The focal point of the lens body 16 falls inside the heat-conducting cone tube, and the opening of the heat-conducting cone tube faces the lens body 16. By setting the heat-conducting component 305 extending into the interior of the spherical water tank 301, heat can be transferred to the water inside the spherical water tank 301 faster and more efficiently during heat collection, so as to reduce heat loss and improve conversion efficiency.

[0037] Reference Figure 3 , Figures 7-9 The spherical water storage tank 301 is connected to an external pipe near its bottom, and an L-shaped connecting pipe 308 is connected to the opening of the external pipe. A damping capillary tube 307 is installed between the L-shaped connecting pipe 308 and the external pipe. The damping capillary tube 307 not only ensures the continuity of the water level, but also reduces the fluctuation of the water level in the spherical water storage tank 301 on the other end of the liquid level pipe 3010 when the water level fluctuates, ensuring a smooth water level change. The L-shaped connecting pipe 308 is located away from the spherical water storage tank. One end of the water tank 301 has a vertical, upward-opening liquid level tube 3010. A float block 3014 slides and floats inside the liquid level tube 3010, and a ring-shaped magnet 3013 is fixed to the upper surface of the float block 3014. A sliding ring 3011, which attracts the magnet 3013, is slidably fitted onto the outer circumference of the liquid level tube 3010. Multiple balls are embedded in the inner circumference of the sliding ring 3011, and a metal rod is fixed to the bottom end of the sliding ring 3011. A metal ring 309 is fixed to the bottom of the spring and the liquid level tube 3010. The metal ring 309 and the sliding ring 3011 are connected in series in the alarm circuit. A liquid replenishment tube 304 is also provided on the top cover 303, and a water supply tube 902 is inserted into the liquid replenishment tube 304. A water tank 9 is provided at the lower surface of the cantilever beam 12 away from the arched fixed hanger 14. A water outlet is provided at the bottom of the water tank 9. A solenoid valve 901 is provided at the water outlet. The outlet of the solenoid valve 901 is connected to the other end of the water supply tube 902. The control switch of the solenoid valve 901 is connected to the output of the controller 4. When the water in the spherical water tank 301 evaporates and falls below the alarm water level, it will cause the float block 3014 to fall, and then the alarm circuit will be turned on. At this time, the controller 4 will start the solenoid valve 901 to release water for a set time to replenish the water level in the spherical water tank 301. This cycle can keep the heating device 3 working continuously.

[0038] Reference Figure 2 and Figure 3 A horn-shaped light-concentrating cover 17 is fixed on the side of the fixed outer frame 15 near the heating device 3. The small opening of the light-concentrating cover 17 is close to the heating device 3 but does not contact the heating device 3. The light-concentrating cover 17 can not only keep the heat, but also prevent birds or maintenance personnel from accidentally entering the light-concentrating area and getting burned. It can also play a safety protection role.

[0039] Reference Figure 1 , Figure 2 and Figure 4The cantilever beam 12, away from the arched fixed hanger 14, has two wing rods 11 extending obliquely to the rear, which are fixed on the left and right sides respectively. The two wing rods 11 and the cantilever beam 12 form a "Y" shape. Both wing rods 11 are channel steel structures with downward openings. The middle of the end of the wing rod 11 away from the cantilever beam 12 is provided with a strip hole, and a hanger seat 10 is slidably inserted into the strip hole. The bottom end of the hanger seat 10 is reserved with a support plate, and the upper surface of the support plate is clamped with a counterweight 8. The top end of the hanger seat 10 is reserved with a screw rod passing through the strip hole, and two sets of opposing nuts are screwed on the screw rod. The two sets of opposing nuts are located on the upper and lower sides of the strip hole respectively, and are used to fix the hanger seat 10 to the wing rod 11.

[0040] Reference Figure 1 and Figure 4 The fixed outer frame 15 includes an upper groove rod and a lower groove rod with openings opposite each other and parallel to each other. Both ends of the upper groove rod and the lower groove rod are reserved with protruding pins. Both ends of the upper groove rod and the lower groove rod are fixed with side guard rods. The side of the lower groove rod away from the support column 7 is provided with a sewage discharge trough 151 near both ends. The bottom of the sewage discharge trough 151 is flush with the light-facing surface of the lens body 16, which can quickly discharge sewage during later rinsing and cleaning, and prevent sludge from accumulating at the corner.

[0041] Reference Figure 1 and Figure 4 An extension plate is reserved at one end of the cantilever beam 12 away from the arched fixed hanger 14, and a slot is opened in the middle of the end of the extension plate. The overall height of the water tank 9 is higher than the height of the spherical water storage tank 301, and a filling pipe is reserved at the top of the water tank 9. The filling pipe is slidably connected in the slot, and a retaining ring is fixed on the outer circumference of the filling pipe above the slot. The filling pipe and retaining ring make the disassembly and installation of the water tank 9 more convenient.

[0042] Reference Figure 10 A Fresnel lens is used in a photovoltaic power generation device based on Fresnel lens focusing, as described above. The lens body 16 is rectangular in shape, with a Fresnel lens in the middle. The upper and lower sides of the lens body 16 are provided with snap-fit ​​ribs 161 for installation. Convex lenses 162 are provided at the four corners of the lens body 16, and the focal point of the convex lens 162 coincides with the focal point of the Fresnel lens.

[0043] Working principle: When the device is in use and there is sunlight, the Fresnel lens in the middle of the lens body 16 focuses the light onto the heat-conducting component 305 in the heating device 3. At this time, the heat-conducting cone tube extending into the spherical water tank 301 will quickly heat the water in the spherical water tank 301 until it boils. At this time, the steam inside will act on the kinetic energy input end of the turbine generator 5 through the steam exhaust pipe 302, thereby driving the turbine generator 5 to generate electricity. When the water in the spherical water tank 301 evaporates and falls below the alarm water level, it will cause the float 3014 to descend, thereby activating the alarm circuit. At this time, the controller 4 will start the solenoid valve 901 to release water for a set time, such as 1 minute, to replenish the water level in the spherical water tank 301. This cycle keeps the heating device 3 working continuously. The controller 4 controls the operation of servo motor 1 20 and servo motor 2 23 to ensure that the lens body 16 is always facing the sun.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic power generation device based on Fresnel lens light condensation, comprising an installation base (1) which is integrally in the shape of a barrel with an opening downward, a support column (7) is rotatably connected to the middle of the upper surface of the installation base (1), the top end of the support column (7) is fixed with a cantilever beam (12) which horizontally extends to the front, the end of the cantilever beam (12) away from the support column (7) is fixed with an arcuate fixed hanger (14), characterized in that, The arched fixed hanger (14) has two ends fixed with symmetrical horizontal bearing assemblies (24) whose centerlines coincide. The two horizontal bearing assemblies (24) are rotatably connected by the same fixed outer frame (15). The lens body (16) is embedded in the middle of the fixed outer frame (15), and a support strip (18) extending below the focal point of the lens body (16) is fixed in the middle of the lower surface of the fixed outer frame (15). A heating device (3) is provided at the end of the upper surface of the support strip (18) away from the fixed outer frame (15), and the heating device (3) includes an internal cavity. A spherical water storage tank (301) with a spherical structure is provided with a top cover (303) on the top of the spherical water storage tank (301). A steam exhaust pipe (302) that is horizontally bent away from the lens body (16) is inserted into the top of the top cover (303). A U-shaped bracket (181) is fixed at the end of the support strip (18) away from the fixed outer frame (15). A turbine generator (5) is fixed at the side of the U-shaped bracket (181) away from the lens body (16). The outlet of the steam exhaust pipe (302) is connected to the kinetic energy input end of the turbine generator (5) through a hose. The mounting base (1) has a mounting hole in the middle of its upper surface, and an anti-detachment bearing (2) is embedded in the mounting hole. The support column (7) is rotatably connected in the anti-detachment bearing (2). A servo motor (20) is fixed near the middle of the lower surface of the mounting base (1), and a drive gear (21) is fixed at the top of the output shaft of the servo motor (20). A driven gear ring (22) that meshes with the drive gear (21) is fixed near the bottom of the outer circumference of the support column (7). An arc-shaped toothed rod (13) is fixed at the top of the U-shaped bracket (181). The center of the circle falls on the axis of the two horizontal bearing groups (24). The outer arc side of the arc-shaped rack (13) is reserved with worm gear teeth. The lower surface of the cantilever beam (12) is fixed with a servo motor two (23) near the outer arc side of the arc-shaped rack (13). The top of the output shaft of the servo motor two (23) is fixed with a worm (6) that meshes with the worm gear teeth. The mounting base (1) is also fixed with a controller (4) that controls the running direction and speed of the servo motor one (20) and the servo motor two (23). The swing angle of the lens body (16) is between 30° and 60°. The spherical water tank (301) has an insertion hole on the side facing the lens body (16), and a heat-conducting component (305) is sealed and welded in the insertion hole. The heat-conducting component (305) includes an annular part attached to the surface of the spherical water tank (301) and a heat-conducting cone tube welded in the middle of the annular part and extending into the interior of the spherical water tank (301). The focal point of the lens body (16) falls inside the heat-conducting cone tube, and the opening of the heat-conducting cone tube faces the lens body (16).

2. A photovoltaic power generation device based on Fresnel lens focusing according to claim 1, characterized in that, The upper surface of the support strip (18) is fixed with a support frame (19) below the spherical water tank (301), and the top of the support frame (19) is fixed with symmetrical ear plates on the left and right sides respectively. The top of the two ear plates is fitted with radial bearings, and the two radial bearings are rotatably connected with coaxial side shaft columns (306). The two side shaft columns (306) are fixed on the outer side wall of the spherical water tank (301) respectively. The spherical water tank (301) contains a counterweight ball (3012). The top of the spherical water tank (301) has a threaded interface (3015) that matches the size of the top cover (303). The top cover (303) is sealed and screwed into the threaded interface (3015).

3. A photovoltaic power generation device based on Fresnel lens focusing according to claim 2, characterized in that, The spherical water storage tank (301) is connected to an external pipe near its bottom end, and an L-shaped connecting pipe (308) is connected to the opening of the external pipe. A damping capillary (307) is provided between the L-shaped connecting pipe (308) and the external pipe. A vertical liquid level pipe (3010) with an upward opening is reserved at the end of the L-shaped connecting pipe (308) away from the spherical water storage tank (301). A floating block (3014) slides and floats inside the liquid level pipe (3010), and a ring-shaped magnet (3013) is fixed on the upper surface of the floating block (3014). A sliding ring (3011) that attracts the magnet (3013) is slidably sleeved on the outer circumference of the liquid level pipe (3010), and multiple balls are embedded in the inner circumference of the sliding ring (3011). The bottom end of the sliding ring (3011) is fixed with a metal spring, the bottom end of the liquid level tube (3010) is fixed with a metal ring (309), and the metal ring (309) and the sliding ring (3011) are connected in series in the alarm circuit. The top cover (303) is also provided with a liquid replenishment tube (304), and a water supply tube (902) is inserted into the liquid replenishment tube (304). The lower surface of the cantilever beam (12) is provided with a water tank (9) at one end away from the arched fixed hanger (14), and the bottom end of the water tank (9) is provided with a water outlet. The water outlet is provided with a solenoid valve (901), and the outlet of the solenoid valve (901) is connected to the other end of the water supply tube (902). The control switch of the solenoid valve (901) is connected to the output end of the controller (4).

4. A photovoltaic power generation device based on Fresnel lens focusing according to claim 1, characterized in that, The fixed outer frame (15) is fixed with a horn-shaped light-concentrating cover (17) on the side near the heating device (3), and the small end of the light-concentrating cover (17) is close to the heating device (3) but does not contact the heating device (3).

5. A photovoltaic power generation device based on Fresnel lens focusing according to claim 1, characterized in that, The cantilever beam (12) is located on the left and right sides of the arched fixed hanger (14) with wing rods (11) extending obliquely to the rear. The two wing rods (11) and the cantilever beam (12) form a "Y" shape. Both wing rods (11) are channel steel structures with downward openings. The middle of the end of the wing rod (11) away from the cantilever beam (12) is provided with a strip hole, and a hanger seat (10) is slidably inserted into the strip hole. The bottom end of the hanger seat (10) is reserved with a support plate, and a counterweight (8) is snapped onto the upper surface of the support plate. The top end of the hanger seat (10) is reserved with a screw rod passing through the strip hole, and two sets of opposing nuts are screwed onto the screw rod. The two sets of opposing nuts are located on the upper and lower sides of the strip hole, respectively.

6. A photovoltaic power generation device based on Fresnel lens focusing according to claim 1, characterized in that, The fixed outer frame (15) includes an upper groove rod and a lower groove rod with openings opposite each other and parallel to each other. Both ends of the upper groove rod and the lower groove rod are reserved with protruding pins. Both ends of the upper groove rod and the lower groove rod are fixed with side guard rods. The lower groove rod is provided with a drain trough (151) near both ends on the side away from the support column (7). The bottom of the drain trough (151) is flush with the light-facing surface of the lens body (16).

7. A photovoltaic power generation device based on Fresnel lens focusing according to claim 3, characterized in that, The cantilever beam (12) has an extension plate reserved at one end away from the arched fixed hanger (14), and a slot is opened in the middle of the end of the extension plate. The overall height of the water tank (9) is higher than the height of the spherical water storage tank (301), and a filling pipe is reserved at the top of the water tank (9). The filling pipe is slidably connected in the slot, and a retaining ring is fixed on the outer circumference of the filling pipe above the slot.

8. A Fresnel lens, applied to a photovoltaic power generation device based on Fresnel lens focusing as described in any one of claims 1-7, characterized in that, The lens body (16) is rectangular in shape, and the middle part of the lens body (16) is a Fresnel lens. The upper and lower sides of the lens body (16) are reserved with snap-fit ​​strips (161) for installation. The four corners of the lens body (16) are reserved with convex lenses (162), and the focal point of the convex lens (162) coincides with the focal point of the Fresnel lens.

Images