A solar heliostat

Abstract

The utility model relates to the technical field of solar light and heat power generation discloses a solar heliostat. The solar heliostat includes: first sub mirror, the distribution of at least two second sub mirrors around the first sub mirror week side, support frame, stand and tracking mechanism, the axis of stand is perpendicular to ground, support frame is located at the top of stand, tracking mechanism is used for driving support frame action, first sub mirror and second sub mirror are located at the side of support frame away from the stand, first sub mirror and support frame fixed connection, every second sub mirror is connected with support frame rotation to the edge part of first sub mirror, the rotation axis of second sub mirror is perpendicular to the arrangement direction of itself and first sub mirror, and is parallel to the mirror surface of first sub mirror, and the part of second sub mirror away from first sub mirror is equipped with support part, and support frame is connected with support part through an adjusting part. The solar heliostat can realize the fast adjustment focal length, and the positioning accuracy is higher, and it is favorable for improving the focusing accuracy of heliostat.

Description

Technical Field

[0001] This utility model relates to the field of solar thermal power generation technology, and in particular to a solar heliostat. Background Technology

[0002] Concentrating Solar Power (CSP) is an important direction for the utilization of new energy sources. It utilizes heliostats to reflect solar radiation energy onto collectors, which then convert this energy into heat energy, generating electricity through a thermal circulation process. Tower-type CSP, as a significant method for large-scale solar power generation, has several distinct advantages: First, its carbon emissions over its entire lifecycle are very low; second, its cost is relatively low compared to existing solar power technologies, making it easier to rapidly achieve large-scale industrialization; and finally, tower-type CSP has strong compatibility with existing thermal power plants and power grid systems.

[0003] In existing tower-type solar thermal power generation systems, to improve solar energy utilization, it is necessary to track the sun and use heliostats to reflect sunlight onto the receiver. Therefore, the solar energy tracking and receiving device is crucial in tower-type solar thermal power generation systems. Due to practical engineering needs, besides the accuracy of solar tracking, the focusing accuracy of the heliostat is also a significant factor affecting the system's solar energy utilization. Current technologies use four support points for heliostat adjustment, requiring all four points to be on the same plane. This results in slow construction speed, high cost, and difficulty in simultaneously meeting high-precision and high-speed adjustment performance. Furthermore, the four-point support not only leads to slow focusing adjustment speed and low accuracy but also makes the heliostat prone to deformation. Under high wind loads, the support structure is prone to deviation, affecting the heliostat's focusing accuracy, causing scattering and low solar energy reception. Maintenance and installation also increase the labor intensity of workers, resulting in low efficiency.

[0004] Therefore, the low focusing accuracy and slow focusing adjustment speed of heliostats are problems that urgently need to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a solar heliostat that uses a single pivot point to adjust the focal length, enabling rapid adjustment of the heliostat's focal length with high positioning accuracy. This improves the focusing accuracy of the heliostat and ensures its operational precision.

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

[0007] A solar heliostat, comprising:

[0008] A first sub-mirror, and at least two second sub-mirrors distributed around the periphery of the first sub-mirror;

[0009] A support frame is provided, which supports the back of the first sub-mirror and the second sub-mirror. The first sub-mirror is fixedly connected to the support frame. Each second sub-mirror is rotatably connected to the support frame at the edge facing the first sub-mirror. The rotation axis of the second sub-mirror is perpendicular to its own and the arrangement direction of the first sub-mirror and parallel to the mirror surface of the first sub-mirror. Each second sub-mirror has a support part at the part away from the first sub-mirror. The support frame is connected to the support part through an adjusting member. The adjusting member is used to adjust the distance between the support part and the support frame so that the second sub-mirror can rotate around the rotation axis to adjust the angle between the mirror surface of the second sub-mirror and the mirror surface of the first sub-mirror.

[0010] A column, the axis of which is perpendicular to the ground, and the support is mounted on the top of the column;

[0011] A tracking mechanism is provided at the top of the column, the tracking mechanism is connected to the support frame and is used to drive the support frame to make the first sub-mirror and the second sub-mirror track the sun.

[0012] In the aforementioned solar heliostat, the heliostat is mounted on the top of a column via a support frame. A tracking mechanism is located at the top of the column and is connected to the support frame via a transmission mechanism. This mechanism drives the support frame to track the sun, ensuring that the heliostat always faces the sun and effectively reflects sunlight, thus improving solar energy utilization. Furthermore, the first and second sub-mirrors are distributed around the first sub-mirror. The edge of each second sub-mirror facing the first sub-mirror is rotatably connected to the support frame. A support portion is located on the part of the second sub-mirror furthest from the first sub-mirror. The support frame is supported by an adjusting component connected to the support portion. This adjusting component can adjust the distance between the support portion and the support frame, thereby adjusting the angle between the mirror surfaces of the second and first sub-mirrors. In other words, the second sub-mirror achieves its angle with the first sub-mirror through a rotating axis and an adjusting point. This single-point adjustment (one adjusting component) allows for rapid adjustment of the heliostat's focal length with high positioning accuracy, improving the heliostat's focusing precision and ensuring its operational accuracy.

[0013] Optionally, the support frame includes an intermediate frame plate and at least two support shafts extending from the centerline of the intermediate frame plate to the outer periphery. The support shafts are fixed to the intermediate frame plate and are arranged in a one-to-one correspondence with the second sub-mirrors.

[0014] The first sub-mirror is opposite to and fixed to the intermediate frame disk;

[0015] In the corresponding second sub-mirror and the support shaft: the second sub-mirror has at least two bases distributed along the extension direction of the rotation axis on the edge facing the first sub-mirror, and the support shaft has bases on both sides respectively. The bases have connecting holes, the axis of the connecting holes coincides with the rotation axis, the support shaft has a connecting shaft, the axis of the connecting shaft coincides with the rotation axis, and the connecting shaft cooperates with the connecting holes and is rotatably connected.

[0016] Optionally, the first sub-mirror is a regular polygon or a circle, the second sub-mirrors are evenly distributed around the periphery of the first sub-mirror, and one end of each of the support shafts facing the center line of the intermediate frame is connected at one point; the first sub-mirror and the second sub-mirror are located on the side of the support shaft away from the intermediate frame, and the first sub-mirror is fixedly connected to each of the support shafts.

[0017] Optionally, the adjusting member includes an adjusting bolt having a first end and a second end opposite to each other, the first end of the adjusting bolt being ball-jointed with the support portion; the support shaft is provided with a threaded hole opposite to the adjusting bolt, and the second end of the adjusting bolt passes through the threaded hole and is threadedly engaged with the threaded hole.

[0018] Optionally, the support portion is provided with a spherical groove, and the first end of the adjusting bolt is provided with a connecting ball, the connecting ball being embedded in the spherical groove and slidingly engaging with the spherical groove; or, the support portion is provided with a connecting ball, and the first end of the adjusting bolt is provided with a spherical groove, the connecting ball being embedded in the spherical groove and slidingly engaging with the spherical groove.

[0019] Optionally, the support portion is connected to the first end of the adjusting bolt via a spherical bearing.

[0020] Optionally, the second end of the adjusting bolt is provided with a knob handle; and / or, the adjusting bolt is provided with a locking nut, the locking nut being threadedly engaged with the adjusting bolt, the locking nut being located on the side of the support shaft opposite to the second sub-mirror, and the direction of the internal thread of the locking nut being opposite to the direction of the internal thread of the threaded hole.

[0021] Optionally, the tracking mechanism includes a first rotating component for driving the support frame to rotate about a first axis and a second rotating component for driving the support frame to rotate about a second axis, wherein the first axis is parallel to the axis of the column, and the second axis is perpendicular to the first axis and parallel to the mirror surface of the first sub-mirror.

[0022] Optionally, the first rotating component is mounted on the top of the column, the first rotating component includes a first rotating output end, the rotation axis of the first rotating output end is coincident with the first axis, the second rotating component is mounted on the first rotating component, the first rotating output end is drivenly connected to the second rotating component to drive the second rotating component to rotate; the second rotating component includes a second rotating output end, the rotation axis of the second rotating output end is coincident with the second axis, and the second rotating output end is drivenly connected to the support frame.

[0023] Optionally, the second rotating component includes a motor and a speed reducer connected to the motor, the output shaft of the speed reducer constituting the second rotating output end; the output shaft of the speed reducer is connected to the support frame via a "U"-shaped drive shaft, the "U"-shaped drive shaft including a first drive shaft and a second drive shaft arranged in parallel, and a connecting bottom shaft connecting one end of the first drive shaft and the second drive shaft in the same direction, wherein the output shaft of the speed reducer is connected to the first drive shaft, and the support frame is connected to the second drive shaft. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0025] Figure 1 A schematic diagram of the structure of a solar heliostat provided for an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the structure of a solar heliostat provided for an embodiment of this utility model;

[0027] Figure 3 A front view schematic diagram of a solar heliostat provided for an embodiment of this utility model;

[0028] Figure 4 A rear view schematic diagram of a solar heliostat provided for an embodiment of this utility model;

[0029] Figure 5 This is a side view schematic diagram of a solar heliostat provided for an embodiment of the present utility model.

[0030] Icons: 1-First sub-mirror; 2-Second sub-mirror; 3-Support frame; 4-Column; 5-Tracking mechanism; 31-Adjusting component; 32-Intermediate gantry plate; 33-Support shaft; 34-Base; 35-Connecting shaft; 51-First rotating assembly; 52-Second rotating assembly; 521-Reducer; 522-"U" shaped drive shaft. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0032] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] refer to Figure 1 and Figure 3As shown, this utility model provides a solar heliostat, including: a column 4, a support frame 3, a first sub-mirror 1, a second sub-mirror 2, and a tracking mechanism 5; specifically, the axis of the column 4 is perpendicular to the ground, the bottom end of the column 4 is fixed to the ground, and the top end is vertically upward. The support frame 3 is installed on the top of the column 4. The first sub-mirror 1 and the second sub-mirror 2 are installed on the support frame 3. The first sub-mirror 1 is fixedly installed in the center of the support frame 3. There are at least two second sub-mirrors 2, which are distributed around the first sub-mirror 1 and spliced ​​together with the first sub-mirror 1, and there is a gap between the second sub-mirrors 2 and the first sub-mirror 1. The support frame 3 supports and connects the back of the first sub-mirrors 1 and the second sub-mirrors 2. The mirror surfaces of the first sub-mirrors 1 and the second sub-mirrors 2 both face upward to reflect sunlight. The tracking mechanism 5 is located at the top of the column 4 and is connected to the support frame 3 in a transmission manner, which can drive the support frame 3 to move so that the first sub-mirrors 1 and the second sub-mirrors 2 track the sun. Each second sub-mirror 2 is rotatably connected to the support frame 3 at its edge facing the first sub-mirror 1. The rotation axis of the second sub-mirror 2 relative to the support frame 3 is perpendicular to its own and the arrangement direction of the first sub-mirror 1, and the rotation axis of the second sub-mirror 2 is parallel to the mirror surface of the first sub-mirror 1. In this way, the second sub-mirror 2 can rotate around the rotation axis, and the mirror surface of the second sub-mirror 2 can be folded at a certain angle towards the mirror surface of the first sub-mirror 1 around the rotation axis. Each second sub-mirror 2 has a support part at its part away from the first sub-mirror 1. The support frame 3 is connected to the support part through an adjusting member 31. The adjusting member 31 is used to adjust the distance between the support part and the support frame 3, so that the second sub-mirror 2 rotates around the rotation axis, thereby adjusting the angle between the mirror surface of the second sub-mirror 2 and the mirror surface of the first sub-mirror 1. In this way, by adjusting the angle between the mirror surface of each second sub-mirror 2 and the mirror surface of the first sub-mirror 1, the focal length of the heliostat can be adjusted.

[0034] In the aforementioned solar heliostat, the heliostat is mounted on the top of the column 4 via a support frame 3. A tracking mechanism 5 is located on the top of the column 4 and is connected to the support frame 3 via a transmission mechanism, driving the support frame 3 to track the sun. This ensures the heliostat always faces the sun, effectively reflecting sunlight and improving solar energy utilization. Furthermore, for the first sub-mirror 1 and the second sub-mirror 2, the second sub-mirrors 2 are distributed around the first sub-mirror 1. The edge of each second sub-mirror 2 facing the first sub-mirror 1 is rotatably connected to the support frame 3. A support portion is provided on the part of the second sub-mirror 2 furthest from the first mirror 1. The frame 3 is supported by an adjusting member 31. The adjusting member 31 can adjust the distance between the supporting part and the support frame 3, thereby adjusting the angle between the mirror surface of the second sub-mirror 2 and the mirror surface of the first sub-mirror 1. That is, the second sub-mirror 2 achieves the angle with the first sub-mirror 1 by means of a rotating axis and an adjusting point. Moreover, by means of a single fulcrum (an adjusting member), the focal length of the heliostat can be quickly adjusted and the positioning accuracy is high, which is conducive to improving the focusing accuracy of the heliostat. This ensures the accuracy of the heliostat and is conducive to improving the utilization rate of solar energy.

[0035] In one possible implementation, such as Figure 1 and Figure 4 As shown, the support frame 3 includes a central frame plate 32 and at least two support shafts 33 extending from the center line of the central frame plate 32 to the outer periphery. The support shafts 33 are fixed to the central frame plate 32 and are arranged in a one-to-one correspondence with the second sub-mirrors 2. The first sub-mirror 1 is opposite to the central frame plate 32 and fixed to the central frame plate 32. The second sub-mirror 2 is mounted on the corresponding support shaft 33. Specifically, in the corresponding second sub-mirror 2 and support shaft 33: the second sub-mirror 2 has at least two bases 34 distributed along the extension direction of the rotation axis on the edge facing the first sub-mirror 1, and the support shaft 33 has bases 34 on both sides respectively. Preferably, two bases 34 can be provided, one on each side of the support shaft 33. Each base 34 has a connecting hole, the axis of which coincides with the rotation axis. The support shaft 33 has a connecting shaft 35, which is welded and fixed to the support shaft 33. The axis of the connecting shaft 35 coincides with the rotation axis and can pass into the connecting hole, engaging and rotating with the hole. Preferably, a rolling bearing can be provided between the connecting shaft 35 and the connecting hole to reduce rotational friction, making the rotation of the second sub-mirror 2 more convenient and facilitating the adjustment of the heliostat's focal length. The structure of the support frame 3 is simple and reliable, and the first sub-mirror 1 and the second sub-mirror 2 are easy to install, which helps improve installation efficiency and facilitates maintenance.

[0036] like Figure 3 and Figure 4 As shown, for the heliostat as a whole formed by splicing the first sub-mirror 1 and the second sub-mirror 2, when the mirror surfaces of the first sub-mirror 1 and the second sub-mirror 2 are both on the same plane, the first sub-mirror 1 and all the second sub-mirrors 2 are spliced ​​into a preset shape, and the preset shape formed by splicing the first sub-mirror 1 and the second sub-mirror 2 can be a polygon or a circle, and the polygon can be a regular polygon, such as a rectangle, a rhombus or a regular hexagon.

[0037] Among them, continue to refer to Figure 3 and Figure 4As shown, the first sub-mirror 1 can be configured as a regular polygon or a circle. Multiple second sub-mirrors 2 are evenly distributed around the periphery of the first sub-mirror 1. The ends of each support shaft 33 facing the centerline of the central frame disk 32 are connected at one point, and the ends of each support shaft 33 facing the centerline of the central frame disk 32 are welded together. Furthermore, each support shaft 33 is welded to one side of the central frame disk 32. The first sub-mirror 1 and the second sub-mirror 2 are located on the side of the support shafts 33 facing away from the central frame disk 32. The first sub-mirror 1 can be fixedly connected to each support shaft 33. The fixed connection between each support shaft 33 and the central frame disk 32 ensures a robust structure. All contact points between the support shafts 33 and the central frame disk 32 are welded. The support shafts 33 have a large torque, resulting in minimal deformation caused by external forces, thus maintaining structural stability and reducing the risk of deformation of the second sub-mirrors.

[0038] For details, please refer to Figure 1 As shown, to achieve stable connection and protect the body of the first sub-mirror, the back of the first sub-mirror 1 has a back plate, the body of the first sub-mirror 1 is attached to the back plate, and the back plate is fixedly connected to the support frame 3. Specifically, the back plate is fixedly connected to each support shaft 33. Similarly, the back of the second sub-mirror 2 has a back plate, the body of the second sub-mirror 2 is attached to the back plate, and the back plate is connected to the support frame 3. Specifically, the edge of the back plate near the first sub-mirror 1 is rotatably connected to the support shaft 33, and a support part is provided on the part of the back plate away from the first sub-mirror 1. The support part is connected to the support shaft 33 through an adjusting member 31.

[0039] For the shape setting and layout of the first and second sub-mirrors, exemplarily, refer to Figure 3 As shown, the first sub-mirror 1 can be set as a rhombus, and the second sub-mirror 2 can be set as a trapezoid. There are four second sub-mirrors 2, which are symmetrically arranged diagonally relative to the first sub-mirror 1. The first sub-mirror 1 is set in the middle, and the four second sub-mirrors 2 are respectively set around the four sides of the first sub-mirror 1. There are four support shafts 33, which are set in accordance with the arrangement of the second sub-mirrors 2. The four support shafts 33 extend outward from the four sides of the first sub-mirror 1, and the two opposite support shafts 33 are coaxially arranged. The two coaxial support shafts 33 can be set as an integral structure. Then, the four outwardly extending support shafts 33 can be formed by two long shafts intersecting and fixing on the middle frame plate 32. In this way, the structure of the middle frame plate 32 and the support shafts 33 is more stable and reliable.

[0040] On the other hand, as a possible implementation method, refer to Figure 1 and Figure 4As shown, the adjusting component 31 specifically includes an adjusting bolt, which has a first end and a second end. The first end of the adjusting bolt is ball-jointed with the support part. The support shaft 33 has a threaded hole opposite to the adjusting bolt. The axis of the threaded hole passes through the axis of the support shaft 33 and is perpendicular to the axis of the support shaft 33. The opening of one end of the threaded hole faces the second sub-mirror 2. The adjusting bolt has external threads on its outer side. The second end of the adjusting bolt passes through the threaded hole and is threaded into the threaded hole. The adjustment is made by connecting the adjusting bolt to the support shaft 33. The adjustment method is simple, safe and reliable. It can improve the adjustment efficiency, ensure the adjustment positioning accuracy, and provide stable support for the second sub-mirror 2. In addition, the first sub-mirror 1 is fixed to the support column. The adjusting bolt, together with the support column, supports the second sub-mirror 2. The overall structure is simple, easy to install, effectively ensures installation efficiency, and helps to reduce equipment maintenance and repair costs and reduce the labor intensity of workers.

[0041] Regarding the specific configuration of the spherical hinge between the first end of the adjusting bolt and the support, one option is to provide a spherical groove in the support and a connecting ball at the first end of the adjusting bolt, with the connecting ball embedded in and slidingly engaging with the spherical groove; alternatively, a connecting ball can be provided in the support, and a spherical groove can be provided at the first end of the adjusting bolt, with the connecting ball embedded in and slidingly engaging with the spherical groove. This sliding engagement between the connecting ball and the spherical groove allows the adjusting bolt to rotate both on its own axis and relative to the support during the adjustment and rotation of the second sub-mirror. It also ensures stable and effective support for the first end of the adjusting bolt at the support, thus contributing to the stability of the connection between the second sub-mirror and the support frame.

[0042] As another embodiment of the ball joint between the first end of the adjusting bolt and the support, the support and the first end of the adjusting bolt can be connected by a spherical bearing, which is simple, reliable and easy to install.

[0043] Based on the aforementioned solar heliostat, the adjustment bolt structure can be further enhanced by adding a knob handle at its second end for easy adjustment. Additionally, a locking nut can be installed on the adjustment bolt, threadedly engaging with it. The locking nut is located on the side of the support shaft away from the second sub-mirror, and the direction of its internal thread is opposite to that of the threaded hole. During adjustment, the locking nut is first rotated relative to the adjustment bolt to a position close to the second end of the bolt, allowing sufficient adjustment length for the bolt facing the support shaft. The adjustment bolt is then rotated, and the locking nut rotates along with it. After adjustment, the bolt is fixed in place, and the locking nut is rotated again until it is close to and firmly against the support shaft, ensuring stable positioning and maintaining focusing accuracy after adjustment of the second sub-mirror.

[0044] In addition, regarding the tracking mechanism setup in the aforementioned solar heliostats, refer to... Figure 1 and Figure 2 As shown, the tracking mechanism 5 includes a first rotating component 51 for driving the support frame 3 to rotate around a first axis, and a second rotating component 52 for driving the support frame 3 to rotate around a second axis. The first axis is parallel to the axis of the column 4, and the second axis is perpendicular to the first axis and parallel to the mirror surface of the first sub-mirror 1. The first rotating component 51 can drive the support frame 3 to rotate left and right in the horizontal plane, and the second rotating component 52 can drive the support frame 3 to tilt up and down. Thus, the heliostat can swing left and right and tilt up and down, and the mirror surface can always be aligned with the sun, realizing sun tracking and improving the utilization rate of solar energy.

[0045] Specifically, the first rotating component 51 is installed on the top of the column 4. The first rotating component 51 includes a first rotating output end, the rotation axis of which is aligned with the first axis. The second rotating component 52 is installed on the first rotating component 51, and the first rotating output end is connected to the second rotating component 52 in a driving connection to drive the second rotating component 52 to rotate. For example, the first rotating component 51 specifically includes a first motor, and the output shaft of the motor constitutes the first rotating output end. The second rotating component 52 includes a second rotating output end, the rotation axis of which is aligned with the second axis, and the second rotating output end is connected to the support frame 3 in a driving connection.

[0046] For example, such as Figure 2 and Figure 4 , Figure 5 As shown, the second rotating assembly 52 specifically includes a motor and a reducer 521 connected to the motor. The output shaft of the reducer 521 constitutes the second rotating output end. The output shaft of the reducer 521 is connected to the support frame 3 via a U-shaped drive shaft 522. The U-shaped drive shaft 522 includes a first drive shaft and a second drive shaft arranged in parallel, and a connecting base shaft connecting one end of the first drive shaft and the second drive shaft in the same direction. The output shaft of the reducer is connected to the first drive shaft, and the support frame 3 is connected to the second drive shaft. Specifically, the second rotating assembly 52 also includes a base frame, which is drivenly connected to the first rotating output end of the first rotating assembly 51. Driven by the first rotary output end, the motor and reducer 521 are both mounted on the base frame, and the base frame is connected to the housing. The motor and reducer 521 are placed inside the housing. The first drive shaft of the "U"-shaped drive shaft 522 is rotatably mounted on the base frame. The axis of the first drive shaft coincides with the second axis. The second drive shaft can be welded to the side of the intermediate frame plate 32 away from the support shaft 33. The output shaft of the reducer 521 is connected to the first drive shaft to drive the first drive shaft to rotate. The second drive shaft can rotate around the first drive shaft, thereby causing the intermediate frame plate 32 and the support shaft 33 to pitch up and down. The overall structure is simple and reliable.

[0047] Specifically, the aforementioned solar heliostat also includes a control device. The control device is signal-connected to the first motor of the first rotating component and to the motor and reducer of the second rotating component. The first rotating component also includes a first encoder connected to the output shaft of the first motor, and the first encoder is signal-connected to the control device. The second rotating component also includes a second encoder connected to the output shaft of the reducer, and the second encoder is signal-connected to the control device. The control device can receive information from the first and second encoders and can also control the operation of the first motor of the first rotating component and the motor of the second rotating component, facilitating precise tracking of the sun.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A solar heliostat, characterized in that, include: A first sub-mirror, and at least two second sub-mirrors distributed around the periphery of the first sub-mirror; A support frame is provided, which supports the back of the first sub-mirror and the second sub-mirror. The first sub-mirror is fixedly connected to the support frame. Each second sub-mirror is rotatably connected to the support frame at the edge facing the first sub-mirror. The rotation axis of the second sub-mirror is perpendicular to its own and the arrangement direction of the first sub-mirror and parallel to the mirror surface of the first sub-mirror. Each second sub-mirror has a support part at the part away from the first sub-mirror. The support frame is connected to the support part through an adjusting member. The adjusting member is used to adjust the distance between the support part and the support frame so that the second sub-mirror can rotate around the rotation axis to adjust the angle between the mirror surface of the second sub-mirror and the mirror surface of the first sub-mirror. A column, the axis of which is perpendicular to the ground, and the support is mounted on the top of the column; A tracking mechanism is provided at the top of the column, the tracking mechanism is connected to the support frame and is used to drive the support frame to make the first sub-mirror and the second sub-mirror track the sun.

2. The solar heliostat according to claim 1, characterized in that, The support frame includes a central frame plate and at least two support shafts extending from the center line of the central frame plate to the outer periphery. The support shafts are fixed to the central frame plate and are arranged in a one-to-one correspondence with the second sub-mirrors. The first sub-mirror is opposite to and fixed to the intermediate frame disk; In the corresponding second sub-mirror and the support shaft: the second sub-mirror has at least two bases distributed along the extension direction of the rotation axis on the edge facing the first sub-mirror, and the support shaft has bases on both sides respectively. The bases have connecting holes, the axis of the connecting holes coincides with the rotation axis, the support shaft has a connecting shaft, the axis of the connecting shaft coincides with the rotation axis, and the connecting shaft cooperates with the connecting holes and is rotatably connected.

3. The solar heliostat according to claim 2, characterized in that, The first sub-mirror is a regular polygon or circle, and the second sub-mirrors are evenly distributed around the periphery of the first sub-mirror. The ends of each of the support shafts facing the center line of the intermediate frame are connected at one point. The first sub-mirror and the second sub-mirror are located on the side of the support shaft away from the intermediate frame, and the first sub-mirror is fixedly connected to each of the support shafts.

4. The solar heliostat according to claim 1, characterized in that, The adjusting component includes an adjusting bolt having a first end and a second end opposite to each other. The first end of the adjusting bolt is ball-jointed with the support portion. The support shaft is provided with a threaded hole opposite to the adjusting bolt, and the second end of the adjusting bolt passes through the threaded hole and is threadedly engaged with the threaded hole.

5. The solar heliostat according to claim 4, characterized in that, The support portion is provided with a spherical groove, and the first end of the adjusting bolt is provided with a connecting ball, which is embedded in the spherical groove and slides in cooperation with the spherical groove; or, the support portion is provided with a connecting ball, and the first end of the adjusting bolt is provided with a spherical groove, which is embedded in the spherical groove and slides in cooperation with the spherical groove.

6. The solar heliostat according to claim 4, characterized in that, The support portion is connected to the first end of the adjusting bolt via a spherical bearing.

7. The solar heliostat according to claim 4, characterized in that, The second end of the adjusting bolt is provided with a knob handle; and / or, the adjusting bolt is provided with a locking nut, the locking nut is threadedly engaged with the adjusting bolt, the locking nut is located on the side of the support shaft away from the second sub-mirror, and the direction of the internal thread of the locking nut is opposite to the direction of the internal thread of the threaded hole.

8. The solar heliostat according to any one of claims 1-7, characterized in that, The tracking mechanism includes a first rotating component for driving the support frame to rotate about a first axis and a second rotating component for driving the support frame to rotate about a second axis. The first axis is parallel to the axis of the column, and the second axis is perpendicular to the first axis and parallel to the mirror surface of the first sub-mirror.

9. The solar heliostat according to claim 8, characterized in that, The first rotating component is installed on the top of the column. The first rotating component includes a first rotating output end, and the rotation axis of the first rotating output end is arranged to coincide with the first axis. The second rotating component is installed on the first rotating component, and the first rotating output end is drivenly connected to the second rotating component to drive the second rotating component to rotate. The second rotating component includes a second rotating output end, and the rotation axis of the second rotating output end is arranged to coincide with the second axis. The second rotating output end is drivenly connected to the support frame.

10. The solar heliostat according to claim 9, characterized in that, The second rotating component includes a motor and a speed reducer connected to the motor. The output shaft of the speed reducer constitutes the second rotating output end. The output shaft of the speed reducer is connected to the support frame via a "U"-shaped drive shaft. The "U"-shaped drive shaft includes a first drive shaft and a second drive shaft arranged in parallel, and a connecting bottom shaft connecting one end of the first drive shaft and the second drive shaft in the same direction. The output shaft of the speed reducer is connected to the first drive shaft, and the support frame is connected to the second drive shaft.

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