A heliostat azimuth angle turning and mirror cleaning device and a solar thermal power generation system

Abstract

The application discloses a heliostat azimuth angle and mirror surface cleaning device and a solar thermal power generation system. An auxiliary rotating part, a column body and a main rotating part are sequentially arranged on an external column base. The auxiliary rotating part is rotatably connected with the column body and is provided with a locking / unlocking unit. The main rotating part is connected with an external mirror frame. The cooperation among the main rotating part, the auxiliary rotating part and the locking / unlocking unit can realize the sun tracking of the heliostat. A cleaning rotating shaft is further arranged to pass through the column body, one end of the cleaning rotating shaft is connected with the auxiliary rotating part, and the other end of the cleaning rotating shaft is connected with a cleaning mechanism through a transmission mechanism. When only cleaning is needed, the locking / unlocking unit is unlocked, the auxiliary rotating part is rotated to realize the cleaning of the heliostat by the cleaning mechanism. When the sun tracking and cleaning are needed, the locking / unlocking unit is locked, the main rotating part and the auxiliary rotating part are rotated in opposite directions to adjust the sun tracking angle of the heliostat, and the cleaning mechanism can clean the mirror surface of the heliostat.

Description

Technical Field

[0001] This invention belongs to the field of solar thermal power generation technology, and particularly relates to a heliostat azimuth angle and mirror cleaning device and a solar thermal power generation system. Background Technology

[0002] As the economy continues to develop, energy is becoming increasingly scarce, and traditional non-renewable energy sources are dwindling. Economic development is increasingly constrained by the development and utilization of energy, leading to widespread attention to the use of renewable energy, particularly solar energy. Solar thermal power generation is currently a major method of solar energy utilization. In the field of solar thermal power generation, tower solar thermal power generation, due to its advantages such as high photothermal conversion efficiency, high focusing temperature, simple control system installation and commissioning, and low heat loss, is poised to become the next commercially viable new energy technology.

[0003] Tower solar thermal power generation uses heliostats to reflect sunlight to achieve the purpose of heat collection. Heliostats are used in harsh outdoor environments, especially in windy and sandy deserts and Gobi environments. Dust easily accumulates on the surface of the heliostats, reducing their reflectivity, and therefore, the heliostats need to be cleaned.

[0004] In tower solar thermal power generation, the rotation angles of each heliostat are different during operation. During the process of heliostat tracking the sun, the rotation angles of heliostats distributed in different areas are very different. When the rotation angle is large, the azimuth angle of the heliostat rotates slowly, resulting in a decrease in the utilization rate of sunlight, which makes it one of the urgent problems to be solved.

[0005] In existing cleaning solutions, most cleaning methods use cleaning trucks or manual brushes. Whether using cleaning trucks or manual methods, the heliostat cannot be kept in a sun-tracking state during mirror cleaning, which not only reduces the photothermal conversion efficiency but also wastes human resources.

[0006] Existing heliostat cleaning solutions only allow the cleaning device to be installed on vehicles that can travel on the ground. This increases the requirements for the flatness of the ground at the solar thermal power generation mirror field, thus increasing the cost of ground flatness. Furthermore, uneven ground can cause vehicles to swing or shake significantly, which can damage the mirror surface when the rigid part of the cleaning device comes into contact with it. There are also technical problems such as the drawbacks of manual cleaning. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a heliostat azimuth angle and mirror cleaning device and a solar thermal power generation system to solve the problem of high cost of existing heliostat cleaning solutions.

[0008] To solve the above problems, the technical solution of the present invention is as follows:

[0009] The present invention provides a heliostat azimuth angle adjustment and mirror cleaning device, comprising:

[0010] An auxiliary rotating part, the fixed end of which is located on an external column base;

[0011] The column body has its lower end rotatably connected to the output end of the auxiliary rotating part, and a locking / unlocking unit is provided between the column body and the output end of the auxiliary rotating part.

[0012] The main rotating part has its fixed end located at the upper end of the column body, and its output end is connected to the external frame.

[0013] A cleaning rotating shaft passes through the column body and the main rotating part. The lower end of the cleaning rotating shaft is connected to the output end of the auxiliary rotating part, and the upper end of the cleaning rotating shaft extends out of the main rotating part.

[0014] A cleaning mechanism, wherein the fixed end of the cleaning mechanism is disposed on the external eyeglass frame, and the actuating end of the cleaning mechanism is used to clean the reflective surface on the external eyeglass frame;

[0015] A transmission mechanism is provided, wherein the input end of the transmission mechanism is connected to the upper end of the cleaning rotating shaft, and the output end of the transmission mechanism is connected to the execution end of the cleaning mechanism, for converting the rotational motion of the cleaning rotating shaft into linear motion and driving the execution end of the cleaning mechanism.

[0016] The heliostat azimuth angle and mirror cleaning device of the present invention includes a first cleaning unit and a second cleaning unit respectively disposed on the outer mirror frame on both sides;

[0017] The first cleaning unit includes a first fixed slide rail assembly and a first cleaning brush, the first cleaning brush being slidably connected to the first fixed slide rail assembly; the second cleaning unit includes a second fixed slide rail assembly and a second cleaning brush, the second cleaning brush being slidably connected to the second fixed slide rail assembly.

[0018] The first fixed slide rail assembly and the second fixed slide rail assembly are respectively fixed to the external frames on both sides;

[0019] The first cleaning brush and the second cleaning brush are respectively connected to the output end of the transmission mechanism.

[0020] The heliostat azimuth rotation and mirror cleaning device of the present invention includes a first transverse slide rail and a second transverse slide rail in both the first fixed slide rail assembly and the second fixed slide rail assembly.

[0021] The first and second transverse slide rails are respectively located on both sides of the longitudinal direction of the outer frame.

[0022] The heliostat azimuth rotation and mirror cleaning device of the present invention includes a transmission mechanism comprising a gear and a rack;

[0023] The gear is located at the upper end of the cleaning rotating shaft; the two ends of the rack are respectively connected to the first cleaning brush and the second cleaning brush via universal joints, and the rack meshes with the gear.

[0024] The heliostat azimuth rotation and mirror cleaning device of the present invention has a plurality of rolling wheels rotatably connected to the lower end face of the column body, and the rolling wheels roll at the output end of the auxiliary rotation part.

[0025] The heliostat azimuth rotation and mirror cleaning device of the present invention has a locking / unlocking unit consisting of at least one column telescopic pin, and the output end of the auxiliary rotation part is provided with at least one corresponding pin hole.

[0026] The fixed end of the telescopic pin is located on the lower end face of the column body, and the telescopic end of the telescopic pin is used to insert into the pin hole.

[0027] The heliostat azimuth rotation and mirror cleaning device of the present invention includes a column telescopic pin comprising a pin body and an electromagnet.

[0028] The pin body is located on the lower end face of the column body, and the electromagnet is located above the pin body.

[0029] The heliostat azimuth rotation angle and mirror cleaning device of the present invention further includes an auxiliary rotation zero point position, an auxiliary rotation zero point detection switch, a main rotation zero point position, and a main rotation zero point detection switch;

[0030] The auxiliary rotation zero point is located on the external column base, and the auxiliary rotation zero point detection switch is located on the output end of the auxiliary rotation part to detect the rotation angle of the output end of the auxiliary rotation part relative to the external column base.

[0031] The main rotation zero point is located on the column body, and the main rotation zero point detection switch is located on the output end of the main rotation part, used to detect the rotation angle of the output end of the main rotation part relative to the column body.

[0032] The heliostat azimuth rotation and mirror cleaning device of the present invention includes an auxiliary rotation reducer for the auxiliary rotation part and a main rotation reducer for the main rotation part.

[0033] The present invention provides a solar thermal power generation system, including the heliostat azimuth rotation and mirror cleaning device described in any one of the above claims.

[0034] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0035] In one embodiment of the invention, an auxiliary rotating part, a column body, and a main rotating part are sequentially arranged on an external column base. The auxiliary rotating part is rotatably connected to the column body and equipped with a locking / unlocking unit. The main rotating part is connected to the external mirror frame. The main rotating part, the auxiliary rotating part, and the locking / unlocking unit work together to complete the sun-tracking of the heliostat. Furthermore, a cleaning rotating shaft passes through the column body, with one end connected to the auxiliary rotating part and the other end connected to the cleaning mechanism via a transmission mechanism. When only cleaning is needed, the locking / unlocking unit is unlocked, and the auxiliary rotating part rotates to allow the cleaning mechanism to clean the heliostat. Alternatively, the locking / unlocking unit is unlocked, and the main rotating part and the auxiliary rotating part rotate in opposite directions. In this case, the sun-tracking angle of the heliostat remains unchanged, but the cleaning mechanism can clean the heliostat's mirror surface. When both sun-tracking and cleaning are required, the locking / unlocking unit is locked, and the main rotating part and the auxiliary rotating part rotate in opposite directions, adjusting the sun-tracking angle of the heliostat while the cleaning mechanism cleans the heliostat's mirror surface. This can reduce the labor and equipment investment required for cleaning the heliostat mirrors in the later stages of the project, and solve the problem of high cost of existing heliostat cleaning solutions. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the heliostat azimuth rotation angle and mirror cleaning device of the present invention;

[0037] Figure 2 This is a schematic diagram of the cleaning mechanism of the heliostat azimuth angle and mirror cleaning device of the present invention;

[0038] Figure 3 This is a schematic diagram of the transmission mechanism of the heliostat azimuth rotation and mirror cleaning device of the present invention;

[0039] Figure 4 This is a schematic diagram of the telescopic pin of the column of the heliostat azimuth angle and mirror cleaning device of the present invention;

[0040] Figure 5 This is a schematic diagram of the column body of the heliostat azimuth angle and mirror cleaning device of the present invention;

[0041] Figure 6 This is a schematic diagram of the zero-point detection part of the heliostat azimuth angle and mirror cleaning device of the present invention;

[0042] Figure 7 Another schematic diagram of the zero-point detection part of the heliostat azimuth angle and mirror cleaning device of the present invention;

[0043] Explanation of reference numerals in the attached drawings: 1: Universal joint; 2: Rack; 3: Gear; 4: Cleaning rotation shaft; 5: Second cleaning brush; 6: Fixed bracket; 7: Second transverse slide rail; 8: First transverse slide rail; 9: Main rotating part; 10: Auxiliary rotating part; 11: Column body; 12: External column base; 13: Main rotation zero point detection switch; 14: Auxiliary rotation zero point detection switch; 15: Main rotation zero point position; 16: Auxiliary rotation zero point position; 17: Rolling wheel; 18: Column telescopic pin; 1801: Pin body; 1802: Pin hole; 19: Column housing. Detailed Implementation

[0044] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a heliostat azimuth rotation and mirror cleaning device and a solar thermal power generation system based on the present invention. The advantages and features of the present invention will become clearer from the following description and claims.

[0045] Example 1

[0046] See Figures 1 to 5 In one embodiment, a heliostat azimuth angle and mirror cleaning device includes an auxiliary rotating part 10, a column body 11, a main rotating part 9, a cleaning rotating shaft 4, a cleaning mechanism, and a transmission mechanism.

[0047] The fixed end of the auxiliary rotating part 10 is located on the external column base 12. The lower end of the column body 11 is rotatably connected to the output end of the auxiliary rotating part 10, and a locking / unlocking unit is provided between the column body 11 and the output end of the auxiliary rotating part 10. The fixed end of the main rotating part 9 is located at the upper end of the column body 11, and the output end of the main rotating part 9 is connected to the external heliostat frame.

[0048] The cleaning rotating shaft 4 passes through the column body 11 and the main rotating part 9. The lower end of the cleaning rotating shaft 4 is connected to the output end of the auxiliary rotating part 10, and the upper end of the cleaning rotating shaft 4 extends out of the main rotating part 9. The fixed end of the cleaning mechanism is located on the outer frame, and the actuating end of the cleaning mechanism is used to clean the reflective surface on the outer frame.

[0049] The cleaning rotating shaft 4 and the cleaning mechanism are connected by a transmission mechanism. The input end of the transmission mechanism is connected to the upper end of the cleaning rotating shaft 4, and the output end of the transmission mechanism is connected to the execution end of the cleaning mechanism. This mechanism is used to convert the rotational motion of the cleaning rotating shaft 4 into linear motion and drive the execution end of the cleaning mechanism.

[0050] In this embodiment, an auxiliary rotating part 10, a column body 11, and a main rotating part 9 are sequentially arranged on an external column base 12. The auxiliary rotating part 10 is rotatably connected to the column body 11 and is equipped with a locking / unlocking unit. The main rotating part 9 is connected to the external mirror frame. The main rotating part 9, the auxiliary rotating part 10, and the locking / unlocking unit work together to complete the sun-tracking of the heliostat. A cleaning rotating shaft 4 is further provided, passing through the column body 11, with one end connected to the auxiliary rotating part 10 and the other end connected to the cleaning mechanism via a transmission mechanism. When cleaning is only required, the locking / unlocking unit is unlocked, and the auxiliary rotating part 10 rotates to allow the cleaning mechanism to clean the heliostat. Alternatively, the locking / unlocking unit is unlocked, and the main rotating part 9 and the auxiliary rotating part 10 rotate in opposite directions. In this case, the sun-tracking angle of the heliostat remains unchanged, but the cleaning mechanism can clean the heliostat mirror surface. When sun tracking and cleaning are required, the locking / unlocking unit locks, and the main rotating part 9 and the auxiliary rotating part 10 rotate in opposite directions, adjusting the sun tracking angle of the heliostat. At the same time, the cleaning mechanism can clean the heliostat mirror surface. This reduces the labor and equipment investment required for cleaning the heliostat mirror surface in the later stages of the project, solving the problem of high costs associated with existing heliostat cleaning solutions.

[0051] The specific structure of the heliostat azimuth rotation angle and mirror cleaning device in this embodiment will be further explained below:

[0052] In this embodiment, the cleaning mechanism described above may include a first cleaning unit and a second cleaning unit respectively disposed on the outer mirror frame on both sides, for cleaning the reflective surfaces on both sides of the column.

[0053] The first cleaning unit includes a first fixed slide rail assembly and a first cleaning brush, with the first cleaning brush slidably connected to the first fixed slide rail assembly. The second cleaning unit includes a second fixed slide rail assembly and a second cleaning brush 5, with the second cleaning brush 5 slidably connected to the second fixed slide rail assembly.

[0054] The first and second fixed slide rail assemblies are respectively fixed to the external mirror frames on both sides, and are used to guide the two cleaning brushes respectively. The first and second cleaning brushes 5 are respectively connected to the output end of the transmission mechanism, that is, the output end of the transmission mechanism drives the two cleaning brushes to slide on the corresponding fixed slide rail assemblies, thereby realizing the cleaning of the two heliostats.

[0055] Specifically, both the first fixed slide rail assembly and the second fixed slide rail assembly mentioned above include a first transverse slide rail 8 and a second transverse slide rail 7.

[0056] The first transverse slide rail 8 and the second transverse slide rail 7 are respectively mounted on both sides of the longitudinal direction of the outer frame via the fixed bracket 6. That is, the first transverse slide rail 8 and the second transverse slide rail 7 are respectively transversely mounted at the upper and lower ends of the heliostat, thus becoming the sliding tracks at both ends of the cleaning brush.

[0057] See Figure 3 In this embodiment, the transmission mechanism may specifically include a gear 3 and a rack 2. The gear 3 is located at the upper end of the cleaning rotating shaft 4. Both ends of the rack 2 are connected to the first cleaning brush and the second cleaning brush 5 via universal joints 1, and the rack 2 meshes with the gear 3. The cleaning rotating shaft 4 drives the gear 3 to rotate, causing the rack 2 meshing with the gear 3 to move laterally, thereby causing the cleaning brushes on both sides to slide on their corresponding slide rails. The function of the universal joint 1 is to ensure that the gear 3 on the cleaning sliding shaft is always meshed with the rack 2 when the horizontal angle of the heliostat changes.

[0058] In this embodiment, the rotatable connection between the column body 11 and the auxiliary rotating part 10 can be achieved by rotatably arranging a plurality of rolling wheels 17 on the lower end surface of the column body 11, with the rolling wheels 17 rolling at the output end of the auxiliary rotating part 10. A structure similar to a plane bearing is formed between the column body 11, the rolling wheels 17, and the auxiliary rotating part 10, thereby enabling the column body 11 to rotate freely relative to the auxiliary rotating part 10.

[0059] See Figure 4 In this embodiment, the locking / unlocking unit is at least one column telescopic pin 18, and the output end of the auxiliary rotating part 10 is provided with at least one corresponding pin hole 1802. The fixed end of the column telescopic pin 18 is located on the lower end face of the column body 11, and the telescopic end of the column telescopic pin 18 is used to insert into the pin hole 1802.

[0060] Specifically, the telescopic pin 18 of the column includes a pin body 1801 and an electromagnet. The pin body 1801 is located on the lower end face of the column body 11, and the electromagnet is located above the pin body 1801. When the electromagnet is de-energized, the magnetic force disappears, and the telescopic end of the pin body 1801 can fall into the pin hole 1802 below, thus locking; when the electromagnet is energized, the magnetic force is formed, and the telescopic end of the pin body 1801 rises under the action of the magnetic force and disengages from the pin hole 1802, thereby unlocking.

[0061] See Figure 6 and Figure 7 In this embodiment, the heliostat azimuth rotation and mirror cleaning device may further include an auxiliary rotation zero point position 16, an auxiliary rotation zero point detection switch 14, a main rotation zero point position 15, and a main rotation zero point detection switch 13.

[0062] The auxiliary rotation zero point position 16 is located on the external column base 12, and the auxiliary rotation zero point detection switch 14 is located on the output end of the auxiliary rotation part 10, which is used to detect the rotation angle of the output end of the auxiliary rotation part 10 relative to the external column base 12.

[0063] The main rotation zero point position 15 is located on the column body 11, and the main rotation zero point detection switch 13 is located on the output end of the main rotation part 9, which is used to detect the rotation angle of the output end of the main rotation part 9 relative to the column body 11.

[0064] In this embodiment, the auxiliary slewing unit 10 can specifically be an auxiliary slewing reducer, and the main slewing unit 9 can specifically be a main slewing reducer.

[0065] Specifically, the main rotary reducer and the auxiliary rotary reducer use the exact same rotary reducer and drive motor.

[0066] For more details, see Figure 5 The auxiliary rotating part 10 is fixed on the external column base 12. The column body 11 is above the auxiliary rotating part 10. The column box 19 is outside the column body 11. The column box 19 is fixed together with the auxiliary rotating part 10. The column box 19 rotates as the auxiliary rotating part 10 rotates. The main rotating part 9 is fixed above the column body 11.

[0067] The following is a further explanation of the operation method of the heliostat azimuth rotation angle and mirror cleaning device in this embodiment:

[0068] The actual angle of the heliostat is determined by the rotation angles of the main rotary reducer and the auxiliary rotary reducer:

[0069] If the column telescopic pin 18 is fixed to the auxiliary rotary reducer:

[0070] Regarding the actual angle of the heliostat:

[0071] (1) When the main rotary reducer and the auxiliary rotary reducer rotate in the same direction, macroscopically, the rotation angle of the entire heliostat is the sum of the angles of the main rotary reducer and the auxiliary rotary reducer.

[0072] (2) When the main rotary reducer and the auxiliary rotary reducer rotate in opposite directions, the rotation angle of the entire heliostat remains unchanged macroscopically.

[0073] (3) Let A represent the angle of the main rotary reducer, B represent the angle of the auxiliary rotary reducer, and S represent the actual angle of the heliostat.

[0074] The actual angle of the heliostat is S = A + B;

[0075] Initially, both the main rotary reducer and the auxiliary rotary reducer are at zero. If the rotary reducer rotates clockwise (forward rotation), then the angles A and B between the main rotary reducer and the auxiliary rotary reducer are positive. If the rotary reducer rotates counterclockwise, the angles A and B between the main rotary reducer and the auxiliary rotary reducer are negative. Similarly, if the rotary reducer rotates clockwise (reverse rotation), the signs of the angles A and B between the main rotary reducer and the auxiliary rotary reducer can be determined.

[0076] If the column telescopic pin 18 is separated from the auxiliary rotary reducer:

[0077] The heliostat does not perform sun tracking or real-time angle rotation. When it is popped open, the heliostat mirror surface can be cleaned. After the auxiliary rotary reducer has finished cleaning, the auxiliary reducer must be rotated back to the angle before cleaning.

[0078] like Figure 6 As shown, the heliostat azimuth rotation angle and mirror cleaning device are shown in a 180-degree schematic diagram. When the heliostat reaches an angle of 180, the main rotary reducer and the auxiliary rotary reducer rotate simultaneously, with each rotation angle A being 90 degrees and B being 90 degrees. From the angle top view, it can be seen that the auxiliary rotary reducer rotates 90 degrees relative to the external column base 12, and the main rotary reducer rotates 90 degrees relative to the heliostat column. The angle top view is more intuitive. Therefore, the target angle of the heliostat mirror S = A + B, that is, 180 = 90 + 90.

[0079] like Figure 7 As shown in the diagram, the azimuth angle and the mirror cleaning device angle are -180 degrees. When the heliostat reaches the angle of -180, the main rotary reducer and the auxiliary rotary reducer rotate simultaneously. The rotation angles A and B are -90 degrees. From the angle top view, it can be seen that the auxiliary rotary reducer rotates 90 degrees relative to the external column base 12, and the main rotary reducer rotates 90 degrees relative to the heliostat column. The angle top view is more intuitive. Therefore, the target angle of the heliostat mirror S = A + B, that is, -180 = -90 + (-90).

[0080] In this embodiment, unlike the ordinary single rotary reducer heliostat structure, when the main rotary reducer and the auxiliary rotary reducer rotate in the same direction, the time required for the heliostat to reach the target angle is halved compared to a single rotary reducer. This enables the heliostat to respond quickly to sun tracking, reduces the sun tracking process time, and greatly improves the sun tracking efficiency and sunlight utilization rate of the heliostat.

[0081] When the column telescopic pin 18 is fixed to the auxiliary rotary reducer, although the cleaning rotating shaft 4 rotates when the main rotary reducer and the auxiliary rotary reducer rotate in the same direction, the rack 2 also rotates along the gear 3 at the same angular velocity, and the rack 2 does not actually slide along the heliostat mirror surface. When the main rotary reducer and the auxiliary rotary reducer rotate in opposite directions, the cleaning rotating shaft 4 can drive the rack 2 to slide back and forth on the cleaning slide rail. Then the cleaning brushes at both ends of the rack 2 slide along the slide rail on the heliostat mirror surface, and the cleaning brushes clean the dust and stains on the heliostat mirror surface. If the column telescopic pin 18 pops out from the pin hole 1802, cleaning the heliostat mirror surface only requires rotating the auxiliary rotary reducer. The column body 11 will not rotate with the auxiliary rotary reducer, but the cleaning rotating shaft 4 will drive the rack 2 to slide, thereby causing the cleaning brushes to slide on the slide rail. Then the cleaning brushes clean the dust and stains on the heliostat mirror surface.

[0082] During the heliostat's sun-tracking process, the cleaning brush does not clean the heliostat mirror surface. When the heliostat needs cleaning, after the heliostat rotates to the target angle, the main rotary reducer and the auxiliary rotary reducer rotate in opposite directions. At this time, the heliostat's azimuth tracking angle remains unchanged, but the cleaning brush slides along the slide rail to clean the heliostat mirror surface. Alternatively, after the heliostat rotates to the target angle, the column telescopic pin 18 is popped out of the auxiliary pin hole 1802, and only the auxiliary rotary reducer is rotated. The cleaning brush slides along the cleaning slide rail to clean the heliostat mirror surface.

[0083] The heliostat azimuth rotation and mirror cleaning device in this embodiment can clean the heliostat mirror surface while maintaining the heliostat's sun-tracking angle, thus preserving both photothermal conversion efficiency and mirror cleanliness. Furthermore, the device has a simple structure, reusable functions, and requires no additional power source to drive the cleaning device, resulting in low energy consumption. It also eliminates the need for other mirror cleaning mechanisms and specialized heliostat mirror cleaning workers, reducing the maintenance and labor costs associated with professional cleaning equipment before and after the project.

[0084] Example 2

[0085] This embodiment provides a solar thermal power generation system, including the heliostat azimuth rotation and mirror cleaning device described in Embodiment 1 above. An auxiliary rotating part 10, a column body 11, and a main rotating part 9 are sequentially arranged on an external column base 12. The auxiliary rotating part 10 is rotatably connected to the column body 11 and equipped with a locking / unlocking unit. The main rotating part 9 is connected to the external mirror frame. The main rotating part 9, the auxiliary rotating part 10, and the locking / unlocking unit work together to achieve heliostat sun-tracking. A cleaning rotating shaft 4 is further provided, passing through the column body 11, with one end connected to the auxiliary rotating part 10 and the other end connected to the cleaning mechanism via a transmission mechanism. When cleaning is only required, the locking / unlocking unit unlocks, allowing the auxiliary rotating part 10 to rotate and thus enabling the cleaning mechanism to clean the heliostat. Alternatively, the locking / unlocking unit unlocks, and the main rotating part 9 and the auxiliary rotating part 10 rotate in opposite directions. In this case, the heliostat's azimuth sun-tracking angle remains unchanged, but the cleaning mechanism can clean the heliostat mirror surface. When sun tracking and cleaning are required, the locking / unlocking unit locks, and the main rotating part 9 and the auxiliary rotating part 10 rotate in opposite directions, adjusting the sun tracking angle of the heliostat. At the same time, the cleaning mechanism can clean the heliostat mirror surface. This reduces the labor and equipment investment required for cleaning the heliostat mirror surface in the later stages of the project, solving the problem of high costs associated with existing heliostat cleaning solutions.

[0086] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A device for heliostat azimuth rotation and mirror cleaning, characterized in that, include: An auxiliary rotating part, the fixed end of which is located on an external column base; The column body has its lower end rotatably connected to the output end of the auxiliary rotating part, and a locking / unlocking unit is provided between the column body and the output end of the auxiliary rotating part. The main rotating part has its fixed end located at the upper end of the column body, and its output end is connected to the external frame to drive the entire frame to rotate. A cleaning rotating shaft passes through the column body and the main rotating part. The lower end of the cleaning rotating shaft is connected to the output end of the auxiliary rotating part, and the upper end of the cleaning rotating shaft extends out of the main rotating part. A cleaning mechanism, wherein the fixed end of the cleaning mechanism is disposed on the external eyeglass frame, and the actuating end of the cleaning mechanism is used to clean the reflective surface on the external eyeglass frame; A transmission mechanism is provided, wherein the input end of the transmission mechanism is connected to the upper end of the cleaning rotating shaft, and the output end of the transmission mechanism is connected to the execution end of the cleaning mechanism, for converting the rotational motion of the cleaning rotating shaft into linear motion and driving the execution end of the cleaning mechanism.

2. The heliostat azimuth rotation and mirror cleaning device as described in claim 1, characterized in that, The cleaning mechanism includes a first cleaning unit and a second cleaning unit respectively disposed on the outer frames on both sides; The first cleaning unit includes a first fixed slide rail assembly and a first cleaning brush, the first cleaning brush being slidably connected to the first fixed slide rail assembly; the second cleaning unit includes a second fixed slide rail assembly and a second cleaning brush, the second cleaning brush being slidably connected to the second fixed slide rail assembly. The first fixed slide rail assembly and the second fixed slide rail assembly are respectively fixed to the external frames on both sides; The first cleaning brush and the second cleaning brush are respectively connected to the output end of the transmission mechanism.

3. The heliostat azimuth rotation and mirror cleaning device as described in claim 2, characterized in that, Both the first fixed slide rail assembly and the second fixed slide rail assembly include a first transverse slide rail and a second transverse slide rail; The first and second transverse slide rails are respectively located on both sides of the longitudinal direction of the outer frame.

4. The heliostat azimuth rotation and mirror cleaning device as described in claim 2, characterized in that, The transmission mechanism includes gears and racks; The gear is located at the upper end of the cleaning rotating shaft; the two ends of the rack are respectively connected to the first cleaning brush and the second cleaning brush via universal joints, and the rack meshes with the gear.

5. The heliostat azimuth rotation and mirror cleaning device as described in claim 1, characterized in that, Several rolling wheels are rotatably connected to the lower end face of the column body, and the rolling wheels roll at the output end of the auxiliary rotating part.

6. The heliostat azimuth rotation and mirror cleaning device as described in claim 1, characterized in that, The locking / unlocking unit is at least one column telescopic pin, and the output end of the auxiliary rotating part is provided with at least one corresponding pin hole; The fixed end of the telescopic pin is located on the lower end face of the column body, and the telescopic end of the telescopic pin is used to insert into the pin hole.

7. The heliostat azimuth rotation and mirror cleaning device as described in claim 6, characterized in that, The telescopic pin of the column includes a pin body and an electromagnet; The pin body is located on the lower end face of the column body, and the electromagnet is located above the pin body.

8. The heliostat azimuth rotation and mirror cleaning device as described in claim 1, characterized in that, It also includes an auxiliary slewing zero point position, an auxiliary slewing zero point detection switch, a main slewing zero point position, and a main slewing zero point detection switch; The auxiliary rotation zero point is located on the external column base, and the auxiliary rotation zero point detection switch is located on the output end of the auxiliary rotation part to detect the rotation angle of the output end of the auxiliary rotation part relative to the external column base. The main rotation zero point is located on the column body, and the main rotation zero point detection switch is located on the output end of the main rotation part, used to detect the rotation angle of the output end of the main rotation part relative to the column body.

9. The heliostat azimuth rotation and mirror cleaning device as described in claim 1, characterized in that, The auxiliary slewing unit is an auxiliary slewing reducer, and the main slewing unit is a main slewing reducer.

10. A solar thermal power generation system, characterized in that, Includes the heliostat azimuth rotation and mirror cleaning device as described in any one of claims 1 to 9.

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