A sun-tracking azimuth corner driving device for a tower type solar thermal power station

Abstract

The application discloses a heliostat azimuth angle driving device for a tower type solar thermal power station and relates to the technical field of solar power generation. The heliostat azimuth angle driving device comprises a base, a supporting column electrically connected to the base, a spray head symmetrically arranged at one end of the base, a first motor arranged on the outer wall of the supporting column, a steering gear rotatably arranged at the top of the supporting column and rotatably connected to the output end of the first motor through a belt, a rotation angle driving structure sleeved on the steering gear and used for driving the rotation angle of the heliostat to track light, a shaft rotatably connected to the end of the rotation angle driving structure, a mirror surface overturning structure arranged on the end surface of the shaft, and a vibration cleaning structure sleeved on the shaft and used for cleaning the mirror surface of the heliostat. A connecting frame is sleeved on the steering gear. Through the application, the common heliostat mirror surface cleaning mode is mostly external spray cleaning. Due to the large workload and high difficulty of mirror surface cleaning, the cost of manual cleaning accounts for more than 30% of the operation and maintenance cost of the power station, which brings a heavy economic burden to the operation of the power station.

Description

Technical Field

[0001] This invention relates to the field of solar power generation technology, specifically to a heliostat azimuth angle driving device for a tower solar thermal power plant. Background Technology

[0002] The heliostat azimuth rotation drive device used in tower solar thermal power plants is the core component of the heliostat tracking system. Its function is to precisely control the rotation of the heliostat's azimuth angle so that the mirror surface is aligned with the sun's position in real time, reflecting sunlight to the absorber at the top of the solar collector tower.

[0003] For example, the heliostat azimuth angle drive device for tower solar thermal power plants disclosed in CN204612215U can achieve high tracking accuracy, high efficiency, strong practicality and low cost; a matching threaded pair is set between the worm and the housing, which makes the assembly of the worm in the housing more stable and improves the installation accuracy of the worm. However, existing heliostats still have some shortcomings.

[0004] At the end of each working cycle, the reflectivity of existing heliostats decreases significantly due to the accumulation of dust, bird droppings, insect remains, and other contaminants, with an average annual decrease of 5%-10%. This problem is particularly prominent in solar thermal power plants in desert areas (taking the Dunhuang project as an example), thus necessitating mirror cleaning. Currently, the most common cleaning method is external spray cleaning. Due to the large workload and high difficulty of mirror cleaning, manual cleaning costs account for more than 30% of the power plant's operation and maintenance expenses, placing a heavy economic burden on the plant's operation.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on the existing heliostat azimuth rotation drive device. Summary of the Invention

[0006] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. Specifically, it aims to offer a heliostat azimuth rotation drive device for tower-type solar thermal power plants. This addresses the issue mentioned in the background where existing heliostats experience a significant decrease in reflectivity after each working cycle due to the accumulation of dust, bird droppings, insect remains, and other contaminants, with an average annual decrease of 5%-10%. This problem is particularly pronounced in solar thermal power plants in desert regions (taking the Dunhuang project as an example), necessitating mirror cleaning. Currently, most common cleaning methods involve external spraying. However, due to the large workload and high difficulty of mirror cleaning, manual cleaning costs account for over 30% of the power plant's operation and maintenance expenses, placing a heavy economic burden on the plant's operation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a heliostat azimuth rotation drive device for a tower solar thermal power plant, comprising a base, a support column electrically connected to the base, a spray nozzle symmetrically arranged at one end of the base, a first motor arranged on the outer wall of the support column, and a steering gear rotatably arranged on the top of the support column and rotatably connected to the output end of the first motor via a belt. It also includes a rotation drive structure sleeved on the steering gear for driving the heliostat to rotate and track light, a shaft fixedly connected to the end of the rotation drive structure, a mirror flipping structure arranged on the end face of the shaft, and a vibration cleaning structure sleeved on the shaft for cleaning the heliostat mirror surface. A connecting frame is sleeved on the steering gear, and an elevation bracket is rotatably arranged on the connecting frame.

[0008] Preferably, the cornering drive structure includes a fixed rod passing through the connecting frame and the elevation bracket, a rotating rod rotatably disposed at one end of the fixed rod, and a servo motor connected to one end of the rotating rod. An elevation gear meshing with a steering gear is fixedly connected to the fixed rod. A drive gear is sleeved on the rotating rod. A transmission gear is rotatably disposed at the center of the elevation bracket. The teeth of the transmission gear mesh with the drive gear. A drive rod is fixedly connected to one end of the transmission gear. One end of the drive rod is fixedly connected to one end of the shaft.

[0009] Preferably, the mirror flipping structure includes a first inner frame fixedly sleeved on the end of the shaft, a refractive mirror rotatably disposed on the outer wall of the first inner frame and distributed at equal angles, a movable rod penetrating the refractive mirror, and a first outer frame sleeved on the movable rod. One end of the movable rod is exposed outside the first outer frame, and a flipping gear is fixedly connected to its end. A drive gear ring is disposed outside the first outer frame and is symmetrically distributed vertically. The teeth of the drive gear ring mesh with the flipping gear.

[0010] Preferably, the outer walls of the two drive gear rings are fixedly connected to mounting blocks for limiting the drive gear rings, the bottom of the mounting blocks are fixedly connected to symmetrically distributed first connecting rods, and the ends of the two first connecting rods are fixedly connected to driven ratchet rings, which are sleeved on the shaft.

[0011] Preferably, a limiting guide rail is fixedly connected to the outer wall of the shaft, and a limiting block is slidably arranged inside the limiting guide rail. One end of the limiting block is engaged with the ratchet groove of the driven ratchet ring, and a retraction spring is provided between the other end of the limiting block and the outer wall of the shaft.

[0012] Preferably, the vibration cleaning structure includes a second inner frame sleeved on the shaft, a third inner frame disposed outside the second inner frame, a second outer frame disposed outside the third inner frame, and a dust removal screen whose outer wall is fixedly connected to the third inner frame and the second outer frame. The dust removal screen is provided with cleaning scrapers distributed at equal angles.

[0013] Preferably, a vibration spring distributed at equal angles is provided between the second inner frame and the third inner frame, and a protrusion distributed at equal angles is fixedly connected to the outer wall of the second inner frame.

[0014] Preferably, the outer wall of the second outer frame is fixedly connected with symmetrically distributed connecting blocks, and one side of the outer wall of each connecting block is fixedly connected with a connecting rod.

[0015] Preferably, the outer wall of the shaft is fitted with a collar, and the outer wall of the collar is fixedly connected with symmetrically distributed vibration plates. The vibration plates are provided with curved grooves for the connecting rod to slide.

[0016] Preferably, a return spring is provided between the collar and the second inner frame, and the return spring is sleeved on the shaft.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The shaft rotates in reverse under the drive of the servo motor. When the shaft rotates in reverse, the limiting block engages in the ratchet groove of the driven ratchet ring, causing the driven ratchet ring to rotate. The driven ratchet ring drives the drive gear ring to rotate through the first connecting rod and the mounting block. The teeth of the drive gear ring mesh with the flipping gear, thereby driving the flipping gear to rotate. The rotation of the flipping gear drives the movable rod to rotate, and the refractive mirror surface fitted on the movable rod flips over within the first outer frame and the first inner frame. On the one hand, the flipped refractive mirror surface faces down, which facilitates subsequent cleaning work. It is easy to use the spray nozzle to spray cleaning fluid and the vibration cleaning structure for efficient cleaning, effectively removing dust, bird droppings, insect remains and other debris from the mirror surface, ensuring the cleanliness of the mirror surface and improving the reflection efficiency. On the other hand, the flipped mirror surface faces up and is in a clean state, ready to receive the sunlight refraction task of the next day without additional adjustment. This ensures that the heliostat can be put into operation quickly and accurately, improving the power generation efficiency and stability of the solar thermal power plant.

[0019] 2. When the refracting mirror rotates to 60°, the dust removal screen begins to move downwards. The dust removal screen moves the second outer frame, second inner frame, and third inner frame downwards together, compressing the return spring. When the refracting mirror rotates to 180°, the second outer frame, second inner frame, and third inner frame return to their original positions under the action of the return spring, causing the cleaning blades on the dust removal screen to adhere to the rotated dusty mirror surface. At this time, the spray nozzles on the base, driven by electronic control, are vertically upwards aimed at the dusty mirror surface and begin spraying mirror cleaning fluid. Subsequently, the servo motor drives the shaft to rotate forward, moving the second inner frame, which in turn causes the cleaning blades to scrape away dust, bird droppings, insect remains, and other debris from the dusty mirror surface.

[0020] 3. On the second night, as the heliostat mirror continues to rotate, the dust removal screen is pushed downwards again. Simultaneously, the dust removal screen slides within the curved groove on the vibrating plate via the connecting rod on the connecting block. Due to the curved design of the groove, the third inner frame compresses the vibration spring according to the groove's guidance. During this compression, the third inner frame contacts the protrusion on the outer wall of the second inner frame, creating a hard contact that causes the vibration spring to rebound. The rebounding vibration spring drives the entire dust removal screen to vibrate reciprocally, thereby dislodging the residual dust left on the screen from the previous day, improving the cleanliness of the dust removal screen, preventing dust accumulation from affecting the cleaning effect on the mirror mirror, and ensuring the smooth progress of subsequent cleaning work. Furthermore, this indirectly improves the efficiency of the entire cleaning process, allowing the heliostat to return to a clean state more quickly, ready for the next day's sunlight refraction tasks. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the heliostat of the present invention.

[0022] Figure 2 This is a schematic diagram of the corner drive structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the mirror structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the mirror structure of the present invention in a flipped state.

[0025] Figure 5 This is a schematic diagram of the driving state of the mirror structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the cleaning structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the cleaning structure of the present invention from another angle.

[0028] Figure 8 for Figure 3 An enlarged schematic diagram of the structure at point A.

[0029] Figure 9 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0030] In the diagram: 1. Base; 2. Support column; 3. First motor; 4. Connecting frame; 5. Steering gear; 6. Elevation bracket; 7. Fixed rod; 8. Rotating rod; 9. Elevation gear; 10. Transmission gear; 11. Drive rod; 12. Servo motor; 13. First outer frame; 14. Refraction mirror; 1401. Flipping gear; 15. Drive gear ring; 16. First connecting rod; 17. Driven ratchet ring; 18. Shaft; 19. Second outer frame; 20. Dust removal screen; 21. Cleaning scraper; 22. Connecting block; 2201. Connecting rod; 23. Vibration plate; 2301. Collar; 2302. Curved groove; 24. Second inner frame; 25. Third inner frame; 26. Protrusion; 27. Vibration spring; 28. Reset spring; 29. ​​Limiting block; 30. Contraction spring. Detailed Implementation

[0031] The technical solutions of the embodiments 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 9 The present invention provides a technical solution: a heliostat azimuth angle driving device for a tower solar thermal power plant, comprising a base 1, a support column 2 electrically connected to the base 1, a spray nozzle symmetrically arranged at one end of the base 1, a first motor 3 arranged on the outer wall of the support column 2, and a steering gear 5 rotatably arranged on the top of the support column 2 and rotatably connected to the output end of the first motor 3 by a belt. It also includes an angle driving structure sleeved on the steering gear 5 for driving the heliostat to rotate and track light, a shaft 18 fixedly connected to the end of the angle driving structure, a mirror flipping structure arranged on the end face of the shaft 18, and a vibration cleaning structure sleeved on the shaft 18 for cleaning the mirror surface of the heliostat. A connecting frame 4 is sleeved on the steering gear 5, and an elevation bracket 6 is rotatably arranged on the connecting frame 4.

[0033] In this embodiment, when the heliostat needs to be rotated, the support column 2 on the base 1 inputs a start signal to the first motor 3, causing the first motor 3 to rotate via the belt-driven steering gear 5. The connecting frame 4, which is sleeved on the steering gear 5, drives the heliostat to rotate horizontally. Subsequently, the connecting frame 4 drives the elevation bracket 6 to rotate the heliostat vertically via the corner drive structure, ensuring that the heliostat tracks the sunlight in real time according to the control end inside the support column 2 and refracts the sunlight onto the receiver at the top of the tower power station. When the heliostat completes its daily work cycle (e.g., at night), the mirror flipping structure rotates a certain distance in the opposite direction on the shaft 18 via the corner drive structure, thus flipping the heliostat mirror surface 180° (after the mirror surface flips 180°, the mirror flipping structure stops rotating to maintain the flipped state). At the same time as the flipping, the heliostat mirror surface is pressed downwards. The vibrating cleaning structure is pushed forward. When the flipping is complete, the vibrating cleaning structure resets and contacts the flipped dusty mirror surface. Then, the spray nozzle on the base 1 is electrically driven and vertically upward to spray the mirror cleaning liquid. Subsequently, the forward rotation of the shaft 18 causes the vibrating cleaning structure to begin scraping away dust, bird droppings, and insect remains on the dusty mirror surface (scraping time is 30-45 minutes, and the vibrating cleaning structure is equipped with a screen for discharging dust and debris). The clean mirror surface after flipping is adapted to sunlight refraction the next day. When the heliostat mirror surface continues to flip the next night, the flipped mirror surface drives the vibrating cleaning structure to press down again. As the vibrating cleaning structure presses down, it vibrates to a certain amplitude, causing the residual dust on the screen to fall off the screen due to vibration, keeping the screen clean.

[0034] The cornering drive structure includes a fixed rod 7 that passes through the connecting frame 4 and the elevation bracket 6, a rotating rod 8 that is rotatably set at one end of the fixed rod 7, and a servo motor 12 that is connected to one end of the rotating rod 8. An elevation gear 9 that meshes with the steering gear 5 is fixedly connected to the fixed rod 7. A drive gear is sleeved on the rotating rod 8. A transmission gear 10 is rotatably set at the center of the elevation bracket 6. The teeth of the transmission gear 10 mesh with the drive gear. A drive rod 11 is fixedly connected to one end of the transmission gear 10. One end of the drive rod 11 is fixedly connected to one end of the shaft 18.

[0035] In this embodiment, when the steering gear 5 rotates, the connecting frame 4 mounted on the steering gear 5 rotates synchronously, thereby driving the entire heliostat to rotate horizontally via the connecting frame 4. Simultaneously, the elevation gear 9, meshing with the steering gear 5, drives the elevation bracket 6 to rotate vertically around the fixed rod 7 and the rotating rod 8 during the horizontal rotation of the heliostat, thus adjusting the elevation angle of the heliostat to suit the sun's position. When the drive shaft 18 needs to rotate, the servo motor 12 is activated. The servo motor 12 drives the rotating rod 8 to rotate, and the drive gear on the rotating rod 8 rotates accordingly, meshing with the drive transmission gear 10 to rotate. Subsequently, the drive rod 11, fixedly connected to the transmission gear 10, drives the shaft 18 to rotate forward or backward according to the actual needs of mirror flipping or cleaning.

[0036] The mirror flipping structure includes a first inner frame fixedly sleeved on the end of the shaft 18, a refractive mirror 14 rotatably disposed on the outer wall of the first inner frame and distributed at equal angles, a movable rod penetrating the refractive mirror 14, and a first outer frame 13 sleeved on the movable rod. One end of the movable rod is exposed outside the first outer frame 13, and a flipping gear 1401 is fixedly connected to its end. A drive gear ring 15 is disposed outside the first outer frame 13 and is symmetrically distributed vertically. The teeth of the drive gear ring 15 mesh with the flipping gear 1401.

[0037] The outer walls of the two drive gear rings 15 are fixedly connected with mounting blocks for limiting the drive gear rings 15. The bottom of the mounting blocks is fixedly connected with symmetrically distributed first connecting rods 16. The ends of the two first connecting rods 16 are fixedly connected with driven ratchet rings 17, which are sleeved on the shaft 18.

[0038] A limiting guide rail is fixedly connected to the outer wall of the shaft 18. A limiting block 29 is slidably arranged inside the limiting guide rail. One end of the limiting block 29 is engaged with the ratchet groove of the driven ratchet ring 17. A retraction spring 30 is provided between the other end of the limiting block 29 and the outer wall of the shaft 18.

[0039] In this embodiment, the refractive mirror 14 is the main body of the heliostat mirror. When the refractive mirror 14 needs to be flipped, the shaft 18 is driven by the servo motor 12 to rotate in the reverse direction. When the shaft 18 rotates in the reverse direction, the limiting block 29 locks the ratchet groove of the driven ratchet ring 17, causing the driven ratchet ring 17 to rotate. The first connecting rod 16 drives the drive gear ring 15 to mesh with the flipping gear 1401 to rotate through the mounting block, causing the flipping gear 1401 to drive the movable rod to rotate. The refractive mirror 14, which is sleeved on the movable rod, performs the flipping operation within the first outer frame 13 and the first inner frame. When the refractive mirror 14 is flipped to 180°, the servo motor 12 stops driving the shaft 18 to rotate in the reverse direction. (It should be noted that both the first motor 3 and the servo motor 12 are controlled by the control end inside the support column 2, which can precisely drive the rotation angle and the forward and reverse rotation angle of the servo motor 12.) The flipped-over refraction mirror 14 has one side used for subsequent cleaning work, and the other side is ready to receive the sunlight refraction task the next day.

[0040] The vibration cleaning structure includes a second inner frame 24 sleeved on the shaft 18, a third inner frame 25 disposed outside the second inner frame 24, a second outer frame 19 disposed outside the third inner frame 25, and a dust removal net 20 whose outer wall is fixedly connected to the third inner frame 25 and the second outer frame 19. The dust removal net 20 is provided with cleaning scrapers 21 distributed at equal angles.

[0041] Vibration springs 27, which are distributed at equal angles, are provided between the second inner frame 24 and the third inner frame 25. Protrusions 26, which are distributed at equal angles, are fixedly connected to the outer wall of the second inner frame 24.

[0042] The outer wall of the second outer frame 19 is fixedly connected with symmetrically distributed connecting blocks 22, and a connecting rod 2201 is fixedly connected to one side of the outer wall of the connecting block 22.

[0043] A collar 2301 is fitted on the outer wall of the shaft 18. A symmetrically distributed vibrating plate 23 is fixedly connected to the outer wall of the collar 2301. A curved groove 2302 is provided on the vibrating plate 23 to allow the connecting rod 2201 to slide.

[0044] A return spring 28 is provided between the collar 2301 and the second inner frame 24, and the return spring 28 is sleeved on the shaft 18.

[0045] In this embodiment, the dust removal screen 20 is the main body of the screen. When the refracting mirror 14 is rotated to 60°, the dust removal screen 20 is pushed downwards. The dust removal screen 20 moves the second outer frame 19, the second inner frame 24, and the third inner frame 25 downwards together, compressing the return spring 28. When the refracting mirror 14 is rotated to 180°, the second outer frame 19, the second inner frame 24, and the third inner frame 25 are reset under the action of the return spring 28, so that the cleaning scraper 21 set on the dust removal screen 20 adheres to the rotated dusty mirror surface. At this time, the spray nozzle on the base 1, driven by electronic control, is vertically upward and aimed at the dusty mirror surface, and begins to spray mirror cleaning liquid. Subsequently, the servo motor 12 drives the shaft 18 to rotate forward, driving the second inner frame 24 to move, thereby causing the cleaning scraper 21 to scrape and clean the dust and debris on the dusty mirror surface. The scraping operation lasts for 30-45 minutes. The clean mirror surface after flipping can adapt to sunlight refraction the next day. When the refraction mirror 14 flips again the following night, it pushes the dust removal net 20 downwards again. At the same time, the dust removal net 20 slides within the curved groove 2302 on the vibrating plate 23 via the connecting rod 2201 on the connecting block 22. Due to the curved design of the curved groove 2302, the third inner frame 25 compresses the vibration spring 27 according to the guide of the curved groove 2302. During the compression process, the third inner frame 25 touches the protrusion 26 on the outer wall of the second inner frame 24, and the two make hard contact, causing the vibration spring 27 to rebound. The rebounding vibration spring 27 drives the dust removal net 20 to vibrate back and forth, thereby vibrating off the residual dust left on the dust removal net 20 the previous day, improving the cleanliness of the dust removal net 20, and thus improving the cleaning efficiency of the dusty mirror surface. (It should be noted that the curved grooves 2302 on the vibrating plate 23 are unidirectional arcs, not symmetrical arcs.)

[0046] Working Principle: When using the heliostat azimuth rotation drive device for tower solar thermal power plants, the support column 2 on the base 1 inputs a start signal to the first motor 3. The first motor 3 drives the steering gear 5 to rotate via belt drive, and the connecting frame 4 sleeved on the steering gear 5 rotates synchronously, thereby driving the entire heliostat to rotate horizontally. At the same time, the elevation gear 9, which meshes with the steering gear 5, drives the elevation bracket 6 to rotate vertically around the fixed rod 7 and the rotating rod 8 during the horizontal rotation of the heliostat, thereby adjusting the elevation angle of the heliostat and ensuring that the heliostat can adjust accordingly according to the position of the sun, refracting sunlight onto the absorber at the top of the tower power plant.

[0047] After the heliostat completes its daily work cycle (e.g., at night), the heliostat mirror needs to be flipped. At this time, the shaft 18 rotates in reverse under the drive of the servo motor 12. When the shaft 18 rotates in reverse, the limiting block 29 engages in the ratchet groove of the driven ratchet ring 17, causing the driven ratchet ring 17 to rotate. The driven ratchet ring 17 drives the drive gear ring 15 to rotate via the first connecting rod 16 and the mounting block. The teeth of the drive gear ring 15 mesh with the flipping gear 1401, thereby driving the flipping gear 1401 to rotate. The rotation of the flipping gear 1401 drives the movable rod to rotate, and the refractive mirror 14, fitted on the movable rod, flips within the first outer frame 13 and the first inner frame. When the refractive mirror 14 is flipped to 180°, the servo motor 12 stops driving the shaft 18 to rotate in reverse. One side of the flipped refractive mirror 14 is used for subsequent cleaning, while the other side is prepared for the next day's sunlight refraction task.

[0048] When the refracting mirror 14 is rotated to 60°, the dust removal screen 20 is pushed downwards. The dust removal screen 20 moves the second outer frame 19, the second inner frame 24, and the third inner frame 25 downwards together, compressing the return spring 28. When the refracting mirror 14 is rotated to 180°, the second outer frame 19, the second inner frame 24, and the third inner frame 25 are reset by the return spring 28, so that the cleaning scraper 21 set on the dust removal screen 20 adheres to the rotated dusty mirror surface. At this time, the spray nozzle on the base 1, driven by electronic control, is vertically upwards aimed at the dusty mirror surface and begins to spray mirror cleaning fluid. Subsequently, the servo motor 12 drives the shaft 18 to rotate forward, driving the second inner frame 24 to move, thereby causing the cleaning scraper 21 to scrape and clean the dust, bird droppings, insect remains, and other debris on the dusty mirror surface. The scraping operation lasts for 30-45 minutes.

[0049] As the heliostat mirror continues to rotate on the second night, the dust removal screen 20 is pushed downwards again. Simultaneously, the dust removal screen 20 slides within the curved groove 2302 on the vibrating plate 23 via the connecting rod 2201 on the connecting block 22. Due to the curved design of the groove 2302, the third inner frame 25 compresses the vibration spring 27 according to the guide of the groove 2302. During this compression, the third inner frame 25 contacts the protrusion 26 on the outer wall of the second inner frame 24, creating a hard contact that causes the vibration spring 27 to rebound. The rebounding vibration spring 27 drives the dust removal screen 20 to vibrate reciprocally, thereby dislodging the residual dust left on the dust removal screen 20 from the previous day, improving the cleanliness of the dust removal screen 20, and thus enhancing the cleaning efficiency of the dusty mirror surface, ensuring the heliostat maintains good working condition.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heliostat azimuth rotation drive device for a tower solar thermal power plant, comprising a base (1), a support column (2) electrically connected to the base (1), spray nozzles symmetrically arranged at one end of the base (1), a first motor (3) arranged on the outer wall of the support column (2), and a steering gear (5) rotatably arranged on the top of the support column (2) and rotatably connected to the output end of the first motor (3) by a belt, characterized in that: It also includes a cornering drive structure mounted on the steering gear (5) for driving the heliostat to rotate and track light, a shaft (18) fixedly connected to the end of the cornering drive structure, a mirror flipping structure set on the end face of the shaft (18), and a vibration cleaning structure mounted on the shaft (18) for cleaning the heliostat mirror surface. A connecting frame (4) is mounted on the steering gear (5), and an elevation bracket (6) is rotatably mounted on the connecting frame (4). The mirror flipping structure includes a fixed structure mounted on the end of the shaft (18). The first inner frame of the part, the refractive mirror (14) rotatably disposed on the outer wall of the first inner frame and distributed at equal angles, the movable rod penetrating the refractive mirror (14) and the first outer frame (13) sleeved on the movable rod, one end of the movable rod is exposed outside the first outer frame (13), and a flip gear (1401) is fixedly connected to its end. A drive gear ring (15) is provided outside the first outer frame (13) and is symmetrically distributed up and down. The teeth of the drive gear ring (15) mesh with the flip gear (1401).

2. The heliostat azimuth rotation drive device for a tower solar thermal power plant according to claim 1, characterized in that: The cornering drive structure includes a fixed rod (7) that passes through the connecting frame (4) and the elevation bracket (6), a rotating rod (8) that is rotatably set at one end of the fixed rod (7), and a servo motor (12) connected to one end of the rotating rod (8). An elevation gear (9) that meshes with the steering gear (5) is fixedly connected to the fixed rod (7). A drive gear is sleeved on the rotating rod (8). A transmission gear (10) is rotatably set at the center of the elevation bracket (6). The teeth of the transmission gear (10) mesh with the drive gear. A drive rod (11) is fixedly connected to one end of the transmission gear (10). One end of the drive rod (11) is fixedly connected to one end of the shaft (18).

3. The heliostat azimuth angle driving device for a tower solar thermal power plant according to claim 1, characterized in that: The outer walls of the two drive gear rings (15) are fixedly connected to mounting blocks for limiting the drive gear rings (15). The bottom of the mounting blocks is fixedly connected to symmetrically distributed first connecting rods (16). The ends of the two first connecting rods (16) are fixedly connected to driven ratchet rings (17), which are sleeved on the shaft (18).

4. The heliostat azimuth angle driving device for a tower solar thermal power plant according to claim 3, characterized in that: The outer wall of the shaft (18) is fixedly connected to a limiting guide rail, and a limiting block (29) is slidably arranged inside the limiting guide rail. One end of the limiting block (29) is engaged with the ratchet groove of the driven ratchet ring (17), and a retraction spring (30) is provided between the other end of the limiting block (29) and the outer wall of the shaft (18).

5. The heliostat azimuth rotation drive device for a tower solar thermal power plant according to claim 1, characterized in that: The vibration cleaning structure includes a second inner frame (24) sleeved on the shaft (18), a third inner frame (25) set outside the second inner frame (24), a second outer frame (19) set outside the third inner frame (25), and a dust removal net (20) whose outer wall is fixedly connected to the third inner frame (25) and the second outer frame (19). The dust removal net (20) is provided with cleaning scrapers (21) distributed at equal angles.

6. The heliostat azimuth rotation drive device for a tower solar thermal power plant according to claim 5, characterized in that: Vibration springs (27) are provided between the second inner frame (24) and the third inner frame (25) at equal angles, and protrusions (26) at equal angles are fixedly connected to the outer wall of the second inner frame (24).

7. The heliostat azimuth rotation drive device for a tower solar thermal power plant according to claim 5, characterized in that: The outer wall of the second outer frame (19) is fixedly connected with symmetrically distributed connecting blocks (22), and a connecting rod (2201) is fixedly connected to one side of the outer wall of the connecting block (22).

8. The heliostat azimuth angle driving device for a tower solar thermal power plant according to claim 7, characterized in that: The outer wall of the shaft (18) is fitted with a collar (2301), and the outer wall of the collar (2301) is fixedly connected with symmetrically distributed vibration plates (23). The vibration plates (23) are provided with curved grooves (2302) for the connecting rod (2201) to slide.

9. The heliostat azimuth angle driving device for a tower solar thermal power plant according to claim 8, characterized in that: A reset spring (28) is provided between the collar (2301) and the second inner frame (24), and the reset spring (28) is sleeved on the shaft (18).

Images