Heliostat for photo-thermal hydrogen production

Abstract

The utility model belongs to the technical field of heliostats, and discloses a heliostat for photo-thermal hydrogen production, which comprises a supporting platform, a stand column and a plurality of sub-mirror adjusting components, the supporting platform is arranged at the top end of the stand column and rotationally connected with the stand column. The plurality of sub-mirror adjusting assemblies are arranged on the supporting platform according to a preset rule; each sub-mirror assembly comprises a supporting and adjusting unit and a sub-mirror unit, the sub-mirror units are rotationally arranged at the ends of the supporting and adjusting units, and the reflectors on the sub-mirror units are spliced to form a mirror surface of the heliostat; the supporting adjusting unit is fixed to the supporting platform and used for adjusting the reflection angle of the reflector so that the condensation ratio of the heliostat can meet the photo-thermal hydrogen production requirement. According to the heliostat, the sub-mirror unit in each sub-mirror adjusting assembly is rotationally connected with the supporting adjusting unit, and the reflecting mirror on each sub-mirror unit can be independently adjusted, so that partition adjustment of the mirror surface of the heliostat is achieved, the light spot quality of the heliostat is improved, and the defects of a traditional heliostat in the light condensation performance are overcome.

Description

Technical Field

[0001] This utility model discloses a heliostat for photothermal hydrogen production, belonging to the field of heliostat technology. Background Technology

[0002] In the field of solar thermal utilization, heliostats, as key concentrating devices, directly determine the conversion efficiency of solar energy and the overall effectiveness of the solar thermal system. Traditional heliostats mainly consist of three parts: a tracking controller, a mechanical support structure, and a reflector. They are designed to accurately track the sun's position, reflect sunlight, and focus it onto the heat collection device to achieve efficient solar energy collection and conversion.

[0003] However, in practical applications, the focusing performance of traditional heliostats is often constrained by various factors, making it difficult to meet the high-energy-consumption requirements of applications such as solar thermal hydrogen production. Specifically, the mechanical support structure of heliostats, including purlins and trusses, is prone to deformation under the long-term influence of the mirror's weight and environmental factors (such as wind load and temperature changes), thus affecting the overall curvature consistency of the mirror surface. Furthermore, the accumulation of errors during installation is also a significant reason for the decrease in the focusing ratio. These factors combined result in the focusing ratio of traditional heliostats being far below the ideal level required for solar thermal hydrogen production, limiting their application potential in the field of high-efficiency energy conversion.

[0004] To address the aforementioned issues, the industry urgently needs to redesign the heliostat structure to eliminate or reduce the effects of deformation, improve focusing accuracy and stability, and thus meet the high focusing ratio requirements of high-end applications such as photothermal hydrogen production. Summary of the Invention

[0005] The purpose of this invention is to provide a heliostat for photothermal hydrogen production to solve the technical problem that the support structure of existing heliostats is prone to deformation under long-term exposure to the weight of the reflector and environmental factors (such as wind load and temperature changes), thus affecting the consistency of the overall curvature of the heliostat's reflective surface. To achieve the above objective, this invention proposes a heliostat for photothermal hydrogen production, the specific solution of which is as follows:

[0006] A heliostat for photothermal hydrogen production includes: a support platform, a column, and multiple sub-mirror adjustment components;

[0007] The support platform is mounted on the top of the column and is rotatably connected to the column;

[0008] The plurality of sub-mirror adjustment components are arranged on the support platform according to a preset rule;

[0009] Each sub-mirror assembly includes a support and adjustment unit and a sub-mirror unit. The sub-mirror unit is rotatably mounted at the end of the support and adjustment unit. The mirrors on the multiple sub-mirror units are spliced ​​together to form the mirror surface of the heliostat.

[0010] The support adjustment unit is fixed on the support platform and is used to adjust the reflection angle of the reflector so that the concentration ratio of the heliostat meets the requirements for photothermal hydrogen production.

[0011] Preferably, the sub-mirror unit includes a mirror and a mirror backplate;

[0012] The surface curvature of the reflector and the back plate of the reflector are matched;

[0013] The back plate of the reflector is fixedly attached to the back of the reflector to prevent the reflector from deforming.

[0014] Preferably, the support adjustment unit includes a support rod and multiple adjustment rods;

[0015] The first end of the support rod is rotatably connected to the back plate of the reflector, and the second end is connected to the support platform.

[0016] One end of each of the plurality of adjusting rods is hinged to the perimeter of the back plate of the reflector, and the other end is rotatably connected to the second end of the support rod.

[0017] Preferably, it also includes a rotary drive reducer;

[0018] The rotary drive reducer is located at the top of the column and is connected to the support platform via a connecting component, and is used to drive the support platform to rotate around the center line of the column.

[0019] Preferably, the connecting assembly includes a support base and a crossbeam tube;

[0020] The support base is fixedly mounted on the rotary drive reducer;

[0021] The crossbeam tube is hinged to the support base and fixedly connected to the support platform.

[0022] Preferably, it also includes a rotary push rod;

[0023] The rotating push rod is hinged to the support base and the crossbeam tube respectively to drive the support platform to pitch and rotate.

[0024] Preferably, the support platform is a support grid structure with multiple partitions composed of multiple trusses.

[0025] Preferably, the column is provided with a first flange and a second flange;

[0026] The first flange is located at the bottom end of the column and is used to connect to the base to fix the column.

[0027] The second flange is located at the top of the column and is connected to the rotary drive reducer.

[0028] Preferably, the back plate of the reflector is integrally molded from a polymer plastic material, and a groove structure is provided on the side surface near the reflector.

[0029] Preferably, the back plate of the reflector and the first end of the support rod are connected by a ball joint;

[0030] The adjusting rod is a telescopic rod.

[0031] Beneficial effects: This utility model achieves the purpose of eliminating deformation and improving the light concentration ratio by cooperating with the support platform and its multiple sub-mirror adjustment components. The sub-mirror unit in each sub-mirror adjustment component is rotatably connected to the support adjustment unit, and the reflector on each sub-mirror unit can be adjusted independently, thereby realizing the zoned adjustment of the heliostat mirror surface, improving the light spot quality of the heliostat, overcoming the shortcomings of traditional heliostats in light concentration performance, and providing solid technical support for high-efficiency energy conversion technologies such as photothermal hydrogen production. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the support platform structure in an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the sub-mirror adjustment component structure in an embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the crossbeam tube structure in an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the overall structure of the heliostat in an embodiment of this utility model.

[0036] In the diagram: 1. Support platform; 2. Column; 3. Sub-mirror adjustment assembly; 4. Sub-mirror unit; 41. Reflector; 42. Reflector back plate; 5. Support adjustment unit; 51. Support rod; 52. Adjusting rod; 53. Ball joint; 6. Rotary drive reducer; 7. Support base; 8. Crossbeam tube; 9. Rotary push rod; 10. First ear plate; 11. Second ear plate; 12. Fixing plate; 13. Reinforcing plate; 14. Diagonal support. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and do not limit its scope of protection.

[0038] This utility model relates to a heliostat structure for photothermal hydrogen production, aiming to meet the light concentration requirements of photothermal hydrogen production by precisely controlling the angle of the reflector 41. The following are specific embodiments of this utility model, detailing the structure of each part of the heliostat and their connection methods.

[0039] A heliostat for photothermal hydrogen production includes: a support platform 1, a column 2, and multiple sub-mirror adjustment components 3; the support platform 1 is located at the top of the column 2 and is rotatably connected to the column 2; the multiple sub-mirror adjustment components 3 are arranged on the support platform 1 according to a preset rule; each sub-mirror component includes a support adjustment unit 5 and a sub-mirror unit 4, the sub-mirror unit 4 is rotatably located at the end of the support adjustment unit 5, and the reflectors 41 on the multiple sub-mirror units 4 are spliced ​​together to form the mirror surface of the heliostat; the support adjustment unit 5 is fixed on the support platform 1 and is used to adjust the reflection angle of the reflectors 41 so that the focusing ratio of the heliostat meets the requirements for photothermal hydrogen production.

[0040] Because traditional support platforms (such as purlin and truss structures) are difficult to adapt to the dynamic adjustment requirements of sub-mirror components in terms of spatial layout and adjustment flexibility, this utility model specifically designs a novel support platform. In this embodiment, each sub-mirror unit 4 achieves multi-degree-of-freedom pose adjustment through an independent support adjustment unit 5. Specifically, under the action of the support adjustment unit 5, each sub-mirror unit 4 in this embodiment can achieve independent adjustment of each reflecting mirror 41 that makes up the heliostat mirror surface, so as to ensure that the surface curvature of each reflecting mirror 41 is not affected by the deformation of other reflecting mirrors 41. In addition, the support platform of this embodiment is a one-piece molded structure, avoiding secondary assembly, which can improve assembly efficiency and resist deflection deformation better than the traditional truss and purlin connection method.

[0041] The heliostat of this invention can eliminate irregular deformation of the heliostat caused by irregular deformation of the support platform 1 by adjusting the deformation of the independent reflecting mirror 41. That is, after long-term use, the support platform 1 deforms. Because the amount of deformation is inconsistent at each point, the adjustment amount of each point is inconsistent during adjustment. This invention can independently adjust the corresponding sub-mirror unit 4 for different amounts of deformation to compensate for the inconsistent deformation of the support platform 1, so that the light spot quality of the heliostat, i.e., the light concentration ratio, is always kept in the best state, which greatly improves the light concentration ratio of the heliostat.

[0042] The sub-mirror unit 4 of this utility model embodiment includes a reflector 41 and a reflector back plate 42; the surface curvature of the reflector 41 and the reflector back plate 42 are matched; the reflector back plate 42 is fixedly attached to the back of the reflector 41 to prevent the reflector 41 from deforming.

[0043] In this embodiment of the invention, the reflector back plate 42 and the reflector 41 are connected by adhesive, ensuring the surface curvature of the reflector 41 and preventing deformation of the reflector 41.

[0044] The support adjustment unit 5 of this utility model embodiment includes a support rod 51 and multiple adjustment rods 52; the first end of the support rod 51 is rotatably connected to the back plate 42 of the reflector, and the second end is connected to the support platform 1; one end of the multiple adjustment rods 52 is hinged to the periphery of the back plate 42 of the reflector, and the other end is rotatably connected to the second end of the support rod 51.

[0045] In this embodiment of the invention, the support rod 51 is rotatably connected to the back plate 42 of the reflector, achieving a degree of freedom of rotation around an axis, thereby enabling multi-degree-of-freedom attitude adjustment of the reflector 41 within a certain range. One end of each of the multiple adjustment rods 52 is connected to the periphery of the back plate 42 of the reflector, and the other end is rotatably connected to the second end of the support rod 51 (i.e., the end closest to the support platform 1). The distributed arrangement of the multiple adjustment rods 52 evenly distributes the weight of the reflector 41, avoiding localized impacts. Specifically, the support adjustment unit 5 of this embodiment of the invention, through the synergistic action of the support rod 51 and the adjustment rods 52, enables multi-degree-of-freedom attitude adjustment of the reflector 41 within the range of pitch angle (±30°) and azimuth angle (±45°). Specifically, when the adjustment rod 52 extends or retracts axially, it can push the back plate 42 of the reflector to rotate around the first end of the support rod 51, thereby changing the pitch angle of the reflector 41. Simultaneously, the distributed hinged design of the multiple adjustment rods 52 balances the load on the reflector 41, avoiding single-point stress concentration and ensuring a stable and reliable adjustment process. In this embodiment, the adjusting rod 52 is hinged to the back plate 42 of the reflector and the support rod 51. There are four adjusting rods 52 in this embodiment. It should be noted that in another embodiment, the hinge points of the adjusting rod 52, the support rod 51, and the back plate 42 of the reflector are all equipped with damping structures to suppress the influence of external vibrations (such as wind) on the mirror attitude.

[0046] This embodiment of the utility model also includes a rotary drive reducer 6; the rotary drive reducer 6 is disposed on the top of the column 2 and connected to the support platform 1 through a connecting component, and is used to drive the support platform 1 to rotate around the center line of the column 2.

[0047] Specifically, a rotary drive reducer 6 is installed on the top of the column 2. The reducer is bolted to the connecting assembly via its output shaft. The rotary drive reducer 6 can drive the entire upper structure (including the support platform 1 and the sub-mirror adjustment assembly 3) to rotate around the center line of the column 2, thereby achieving sun tracking and ensuring that the reflector 41 is always aligned with the sun to meet the light-gathering requirements.

[0048] The connecting component of this utility model embodiment includes a support base 7 and a crossbeam tube 8; the support base 7 is fixedly mounted on the rotary drive reducer 6; the crossbeam tube 8 is hinged to the support base 7 and fixedly connected to the support platform 1.

[0049] Specifically, the support base 7 is fixedly installed on the upper part of the rotary drive reducer 6, and the support base 7 and the rotary drive reducer 6 are connected by bolts. A set of first ear plates 10 are provided on the crossbeam tube 8, and the first ear plates 10 are connected to the support base 7 by hinge, so that the crossbeam tube 8 can pitch and rotate within a certain range.

[0050] A fixing plate 12 is also arranged on the crossbeam tube 8, and the fixing plate 12 is fixedly connected to the support platform 1 by bolts.

[0051] In this embodiment, the fixing plate 12 specifically includes two sets. The upper ends of both sets of fixing plates 12 are fixedly connected to the support platform 1 with bolts, and the lower ends are fixedly connected to multiple diagonal supports 14 respectively. Specifically, one end of the diagonal support 14 is fixedly connected to the lower end of the fixing plate 12, and the other end is fixedly connected to the support platform 1, forming a stable triangular support structure. In addition, a reinforcing plate 13 is welded at the connection between the support platform 1 and the support adjustment unit 5, and a reinforcing plate 13 is welded at the connection between the support platform 1 and the crossbeam tube 8 to improve the stability of the structure and the ease of installation.

[0052] This embodiment of the utility model also includes a rotating push rod 9; the rotating push rod 9 is hinged to the support base 7 and the crossbeam tube 8 respectively, so as to drive the support platform 1 to pitch and rotate.

[0053] In this embodiment of the invention, the support base 7 and the crossbeam tube 8 are further provided with a second ear plate 11 for connecting the rotating push rod 9. The rotating push rod 9 can drive the crossbeam tube 8 and the entire upper structure to adjust the pitch angle. Specifically, the rotating push rod 9 in this embodiment of the invention is an electric push rod, driven by a motor.

[0054] Specifically, one end of the electric actuator is hinged to the second ear plate 11 of the support base 7, and the other end is hinged to the second ear plate 11 of the crossbeam tube 8. The electric actuator enables precise adjustment of the pitch angle of the crossbeam tube 8 and the entire upper structure, thereby further adjusting the angle of the reflector 41 to meet the focusing requirements of photothermal hydrogen production.

[0055] The support platform 1 in this embodiment of the invention is specifically a support grid frame with multiple sections composed of multiple trusses. Specifically, the support platform 1 is entirely connected using rectangular tubes, and the platform section is equipped with reinforcing ribs to ensure the stability of the platform structure. The design of this platform is intended to independently distinguish multiple sub-mirror adjustment components 3.

[0056] The column 2 of this utility model embodiment is provided with a first flange and a second flange; the first flange is provided at the bottom end of the column 2 and is used to connect to the base to fix the column 2; the second flange is provided at the top end of the column 2 and is connected to the rotary drive reducer 6.

[0057] Specifically, the heliostat structure of this utility model includes a column 2, which serves as the supporting foundation for the entire structure. A first flange and a second flange are respectively installed at the upper and lower ends of the column 2. The first flange is located at the bottom end of the column 2 and is fixed to the base by bolts to ensure the stability of the column 2. The second flange is located at the top end of the column 2 and is bolted to the rotary drive reducer 6, used to support and drive the upper rotating structure.

[0058] Furthermore, the back plate 42 of the reflector is integrally molded from a polymer plastic material, and a groove structure is provided on the side surface near the reflector 41.

[0059] The back plate 42 of the reflector in this embodiment is made of a polymer material, which has excellent adjustability and stability. The back plate 42 is processed with a groove structure by stamping technology. This groove structure not only increases the contact area between the reflector 41 and the back plate 42, improving the stability of the connection, but also helps to fill the glue, ensuring that the reflector 41 and the back plate 42 can fit tightly together and not fall off.

[0060] In this embodiment of the invention, the first end of the reflector back plate 42 and the support rod 51 are connected by a ball joint 53; the adjusting rod 52 is a telescopic rod. The adjusting rod 52 adjusts the sub-mirror by means of its telescopic properties and its hinged rotation with the reflector back plate 42 and the support rod 51.

[0061] The back plate of the reflector 42 is connected to the support rod 51 by a ball joint 53, which allows the back plate of the reflector 42 to rotate freely within a certain range.

[0062] The backplate 42 of the reflector is injection molded from a high-polymer plastic material, exhibiting excellent weather resistance and stability. A groove structure is provided on the surface of the backplate 42 near the reflector 41.

[0063] In summary, the heliostat structure for photothermal hydrogen production of this invention achieves precise control of the 41° angle of the reflector through accurate construction and connection, thus meeting the focusing requirements of photothermal hydrogen production. This structure has advantages such as simple structure, good stability, and convenient adjustment, making it suitable for large-scale photothermal hydrogen production systems.

[0064] The above description is merely a few embodiments of this utility model and is not intended to limit this utility model in any way. Although this utility model has been disclosed above with preferred embodiments, it is not intended to limit this utility model. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this utility model using the disclosed technical content are equivalent to equivalent implementation cases and all fall within the scope of the technical solution.

Claims

1. A heliostat for photo-thermal hydrogen production, characterized in that, The utility model relates to a kind of heliostat, including: Support platform, column and multiple sub-mirror adjusting components; The support platform is arranged at the top of the column, and is rotationally connected with the column; The multiple sub-mirror adjusting components are arranged on the support platform in a preset rule; Each sub-mirror component includes a support adjusting unit and a sub-mirror unit, the sub-mirror unit is rotationally arranged at the end of the support adjusting unit, and the reflecting mirrors on the multiple sub-mirror units are spliced to form the mirror surface of the heliostat; The support adjusting unit is fixed on the support platform, for adjusting the reflection angle of the reflecting mirror, so that the light concentration ratio of the heliostat meets the requirement of photo-thermal hydrogen production.

2. The heliostat of claim 1, wherein, The sub-mirror unit includes a reflecting mirror and a reflecting mirror backplate; The surface type of the reflecting mirror and the reflecting mirror backplate is matched; The reflecting mirror backplate is fixedly attached to the back of the reflecting mirror to prevent the reflecting mirror from deforming.

3. The heliostat of claim 2, wherein, The support adjusting unit includes a support rod and multiple adjusting rods; The first end of the support rod is rotationally connected with the reflecting mirror backplate, and the second end is connected with the support platform; One end of the multiple adjusting rods is hingedly connected around the reflecting mirror backplate, and the other end is rotationally connected with the second end of the support rod.

4. The heliostat of claim 1, wherein, It also includes a rotary drive speed reducer; The rotary drive speed reducer is arranged at the top of the column and is connected with the support platform through a connecting assembly for driving the support platform to rotate around the center line of the column.

5. The heliostat of claim 4, wherein, The connecting assembly includes a support seat and a cross beam tube; The support seat is fixedly arranged on the rotary drive speed reducer; The cross beam tube is hingedly connected to the support seat and is fixedly connected with the support platform.

6. The heliostat of claim 4, wherein, It also includes a rotary push rod; The rotary push rod is hingedly connected with the support seat and the cross beam tube respectively to drive the support platform to pitch and rotate.

7. The heliostat of claim 1, wherein, The support platform is specifically a support grid with multiple sub-areas composed of multiple trusses.

8. The heliostat of claim 4, wherein, The column is provided with a first flange plate and a second flange plate; The first flange plate is arranged at the bottom end of the column for connecting a base to fix the column; The second flange plate is arranged at the top end of the column and is connected with the rotary drive speed reducer.

9. The heliostat of claim 2, wherein, The reflecting mirror backplate is integrally formed by injection molding with a high-molecular plastic material, and the side surface close to the reflecting mirror is provided with a groove structure.

10. The heliostat of claim 3, wherein, The reflecting mirror backplate and the first end of the support rod are connected through a spherical pair; The adjusting rod is a telescopic rod.

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