Fixed-focus disc type light condensation and heat collection system and control method thereof

Abstract

The invention provides a fixed-focus disc type light condensation and heat collection system and a control method thereof. The system comprises a heat collector support, an arc-shaped rail, a rotating table, a rotating shaft, a linear guide rail, a first sliding block, a second sliding block, a main support, an auxiliary support and a tracking control unit. The heat collector bracket is fixedly arranged; the arc-shaped track is arranged around the heat collector bracket and is fixed relative to the heat collector bracket; the rotating shaft is arranged at the circle center of the arc-shaped track; the rotating table is rotatably arranged on the rotating shaft and movably arranged on the arc-shaped track; the linear guide rail is arranged on the rotating table; the first sliding block and the second sliding block are movably arranged on the linear guide rail; one end of the main support is hinged to the first sliding block, and the other end is used for being hinged to the parabolic reflector. One end of the auxiliary support is hinged to the second sliding block, and the other end is hinged to the main support. The tracking control unit is used for controlling the rotating table, the first sliding block and the second sliding block. The system can reduce the dependence on precision mechanical equipment, thereby reducing the cost and improving the reliability of the system.

Description

Technical Field

[0001] The present application relates to the field of photothermal technology, and in particular to a fixed-focus dish-type concentrating heat collection system and a control method thereof. Background Art

[0002] Parabolic dish reflectors have high concentration ratio and high light collection efficiency, and are suitable for solar thermal power generation scenarios. Their high-precision reflective surface can efficiently focus sunlight onto the collector, thereby collecting high-temperature thermal energy.

[0003] In common designs, the collector is fixed on the reflector bracket, which means that when the reflector adjusts its angle with the movement of the sun, the collector will also move. This change in spatial position makes it difficult to keep the collector cavity fixed, limiting its application in large-scale centralized solar thermal power generation systems. Therefore, this type of design is more suitable for distributed power generation scenarios.

[0004] In recent years, in order to overcome the above limitations, some new design concepts have attempted to solve this problem by fixing the spatial position of the solar collector cavity. For example, the core idea of ​​some designs is to let the reflector move around a fixed solar collector cavity, thereby fixing the position of the solar collector cavity. However, this type of design has the following problems:

[0005] 1. High cost: It requires precise tracks and rotating gantry, which are expensive to manufacture and maintain.

[0006] 2. Structural complexity: Complex mechanical structures have extremely high requirements for processing accuracy and installation. Any slight error may lead to a decline in system performance.

[0007] 3. Lack of flexibility: Due to the rigid characteristics of the mechanical structure, deviations generated during use (such as thermal expansion, material aging, etc.) cannot be compensated or eliminated by the control system. Summary of the invention

[0008] The embodiments of the present application at least provide a fixed-focus dish-type concentrating solar collector system and a control method thereof, which can reduce the dependence on precision mechanical equipment, avoid the problem that defects in structural accuracy and changes in use cannot be compensated or eliminated by the control system, and at the same time can reduce costs and improve system reliability.

[0009] In a first aspect, an embodiment of the present application provides a fixed-focus dish-type concentrated solar collector system, comprising:

[0010] Collector bracket, arc track, rotating table, rotating shaft, linear guide rail, first slider, second slider, main bracket, auxiliary bracket and tracking control unit;

[0011] The collector bracket is fixedly arranged and used for installing the collector;

[0012] The arc-shaped track is arranged around the collector bracket and is fixed relative to the collector bracket;

[0013] The rotating shaft is arranged at the center of the arc track;

[0014] The rotating platform is rotatably arranged on the rotating shaft and movably arranged on the arc track, and the rotating platform is arranged to be able to move on the arc track around the rotating shaft;

[0015] The linear guide rail is arranged on the rotating table along the radial direction of the arc track;

[0016] The first slider and the second slider are respectively movably arranged on the linear guide rail, and the first slider and the second slider are both arranged to be able to move along the linear guide rail;

[0017] One end of the main bracket is hinged to the first slider, and the other end is used for hingedly connecting the parabolic reflector;

[0018] One end of the auxiliary bracket is hinged to the second slider, and the other end is hinged to the main bracket;

[0019] The tracking control unit is electrically connected to the rotating table, the first slider and the second slider respectively, and is configured to monitor the orientation of the parabolic reflector and its position relative to the collector, and control the rotating table, the first slider and the second slider according to the monitoring information.

[0020] In an optional embodiment, the rotating table is provided with a rotating wheel and a first driving motor, the rotating table is movably arranged on the arc track through the rotating wheel, the first driving motor is connected to the rotating wheel, and the first driving motor is used to drive the rotating wheel to rotate so as to drive the rotating table to move on the arc track around the rotating axis.

[0021] In an optional implementation, both the first slider and the second slider are electric sliders.

[0022] In an optional embodiment, the main support and the auxiliary support each include two support rods and a plurality of connecting rods, the two support rods are parallel to each other, and the plurality of connecting rods are respectively connected between the two support rods and arranged at intervals.

[0023] In an optional embodiment, it also includes an angle adjustment component, which is connected between the main support and the parabolic reflector, and the angle adjustment component is configured to output torque to adjust the pitch angle of the parabolic reflector.

[0024] In an optional embodiment, the angle adjustment assembly includes a second drive motor and a gear transmission assembly, the second drive motor is arranged on the main bracket for outputting torque, and the gear transmission assembly is connected between the second drive motor and the hinge shaft of the parabolic reflector for transmitting the torque to the hinge shaft so that it drives the parabolic reflector to rotate.

[0025] In a second aspect, an embodiment of the present application further provides a control method for a fixed-focus dish-type concentrated solar collector system, which is applicable to the fixed-focus dish-type concentrated solar collector system described in any one of the first aspects, comprising:

[0026] Monitoring the orientation of the parabolic reflector, and controlling the rotating platform to rotate around the rotating axis according to the monitoring information to adjust the orientation of the parabolic reflector;

[0027] The position of the parabolic reflector relative to the collector is monitored, and the movement of the first slider and the second slider is controlled according to the monitoring information to adjust the position of the parabolic reflector relative to the collector in the height direction and the horizontal direction.

[0028] In an optional implementation, controlling the movement of the first slider and the second slider according to the monitoring information to adjust the position of the parabolic reflector relative to the collector in the height direction and the horizontal direction includes:

[0029] Controlling the relative movement of the first slider and the second slider to adjust the position of the parabolic reflector relative to the height direction of the collector;

[0030] The first slider and the second slider are controlled to move synchronously to adjust the horizontal position of the parabolic reflector relative to the collector.

[0031] In an optional embodiment, the fixed-focus dish-type concentrating solar collector system further includes an angle adjustment component for adjusting the pitch angle of the parabolic reflector; the method further includes:

[0032] The angle of the parabolic reflector is monitored, and the angle adjustment component is controlled according to the monitoring information to adjust the pitch angle of the parabolic reflector.

[0033] The above technical solution of the present application has the following beneficial technical effects:

[0034] The fixed-focus dish-type concentrating solar collector system of the embodiment of the present application uses an arc track, a rotating shaft and a rotating table to form an azimuth adjustment mechanism of the parabolic reflector, which is used to control the rotation of the rotating table around the rotating shaft to adjust the azimuth of the parabolic reflector. At the same time, a first slider, a second slider, a main bracket and a sub-bracket are used to form a position adjustment mechanism of the parabolic reflector, which is used to control the relative or synchronous movement of the first slider and the second slider to adjust the height direction or horizontal direction of the parabolic reflector. In other words, the system uses low-cost, low-precision components to achieve the adjustment of the azimuth and position of the parabolic reflector, which can reduce the dependence on precision mechanical equipment, avoid the problem that the defects of structural accuracy and changes in use cannot be compensated or eliminated by the control system, and at the same time can reduce costs and improve the reliability of the system.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solutions of the present application. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of a fixed-focus dish-type concentrated heat collection system provided in an embodiment of the present application is shown;

[0038] Figure 2 A top view of a rotating platform and an arc track provided in an embodiment of the present application is shown;

[0039] In the figure, 1. collector bracket; 2. collector; 3. arc track; 4. rotating shaft; 5. rotating table; 5.1. rotating wheel; 5.2. first driving motor; 6. linear guide; 7. first slider; 8. second slider; 9. main bracket; 10. auxiliary bracket; 11. second driving motor; 12. gear transmission assembly; 13. parabolic reflector; 14. tracking control unit. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0041] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0042] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] refer to Figure 1 and Figure 2 The embodiment of the present application provides a fixed-focus dish-type concentrating solar collector system, which can reduce the dependence on precision mechanical equipment, avoid the problem that defects in structural accuracy and changes in use cannot be compensated or eliminated by the control system, and at the same time can reduce costs and improve system reliability.

[0046] Specifically, the fixed focus dish type concentrated solar collector system comprises:

[0047] A collector bracket 1, which is fixedly arranged and used for mounting a collector 2;

[0048] An arc track 3, which is arranged around the collector bracket 1 and fixed relative to the collector bracket 1;

[0049] A rotating shaft 4, the rotating shaft 4 is arranged at the center of the arc track 3, and the axis of the rotating shaft 4 intersects with the focus of the parabolic reflector 13 at the collector 2;

[0050] A rotating table 5, the rotating table 5 is rotatably disposed on the rotating shaft 4 and movably disposed on the arc track 3, and the rotating table 5 is configured to be able to move on the arc track 3 around the rotating shaft 4;

[0051] A linear guide rail 6, which is arranged on the rotating platform 5 along the radial direction of the arc track 3;

[0052] A first slider 7, the first slider 7 is movably disposed on the linear guide rail 6, and the first slider 7 is configured to be able to move along the linear guide rail 6;

[0053] a second slider 8, the second slider 8 is movably disposed on the linear guide rail 6 and is located on a side of the first slider 7 close to the rotating shaft 4, and the second slider 8 is configured to be able to move along the linear guide rail 6;

[0054] A main bracket 9, one end of which is hinged to the first slider 7, and the other end of which is used to hinge to the parabolic reflector 13;

[0055] A secondary bracket 10, one end of the secondary bracket 10 is hinged to the second slider 8, and the other end of the secondary bracket 10 is hinged to the main bracket 9;

[0056] An angle adjustment component, the angle adjustment component is connected between the main support 9 and the parabolic reflector 13, and the angle adjustment component is configured to output torque to adjust the pitch angle of the parabolic reflector 13;

[0057] The tracking control unit 14 is electrically connected to the rotating table 5, the first slider 7, the second slider 8 and the angle adjustment component respectively. The tracking control unit 14 is configured to monitor the orientation, angle and position of the parabolic reflector 13 relative to the collector 2, and control the rotating table 5, the first slider 7, the second slider 8 and the angle adjustment component according to the monitoring information, so that the focus of the parabolic reflector 13 is always located on the collector 2.

[0058] A control method for a fixed-focus dish-type concentrated solar collector system, comprising:

[0059] The tracking control unit 14 monitors the position of the parabolic reflector 13 and controls the rotating platform 5 to rotate around the rotating axis 4 according to the monitoring information to adjust the position of the parabolic reflector 13;

[0060] The tracking control unit 14 monitors the position of the parabolic reflector 13 relative to the collector 2, and controls the first slider 7 and the second slider 8 to move according to the monitoring information to adjust the position of the parabolic reflector 13 in the height direction and the horizontal direction relative to the collector 2. That is, the first slider 7 and the second slider 8 are controlled to move relative to each other to adjust the position of the parabolic reflector 13 in the height direction relative to the collector 2; the first slider 7 and the second slider 8 are controlled to move synchronously to adjust the position of the parabolic reflector 13 in the horizontal direction relative to the collector 2.

[0061] Optionally, the rotating platform 5 is provided with a rotating wheel 5.1 and a first driving motor 5.2, the rotating platform 5 is movably arranged on the arc track 3 through the rotating wheel 5.1, the first driving motor 5.2 is connected to the rotating wheel 5.1, and the first driving motor 5.2 is used to drive the rotating wheel 5.1 to rotate, so as to drive the rotating platform 5 to move around the rotating axis 4 on the arc track 3. In this way, the rotating platform 5 can rotate around the rotating axis 4.

[0062] Optionally, the first slider 7 and the second slider 8 are both electric sliders. In this way, the first slider 7 and the second slider 8 can move on the linear guide rail 6.

[0063] Optionally, the main support 9 and the auxiliary support 10 are arranged in a herringbone shape, which can improve the stability of the structure.

[0064] Optionally, the main support 9 and the auxiliary support 10 each include two support rods and a plurality of connecting rods, the two support rods are parallel to each other, and the plurality of connecting rods are respectively connected between the two support rods and arranged at intervals. In other words, the main support 9 and the auxiliary support 10 are both ladder-shaped structures. This arrangement can improve the reliability of the structure.

[0065] Optionally, the tracking control unit 14 uses one or more of an encoder, an inclination sensor, and a magnetic sensor to perform orientation monitoring.

[0066] Optionally, the tracking control unit 14 uses one or more of a laser rangefinder, a visual sensor, and a GPS positioning system to monitor the position.

[0067] Optionally, an angle adjustment component is further included, the angle adjustment component is connected between the main support 9 and the parabolic reflector 13, and the angle adjustment component is configured to be able to output torque to adjust the pitch angle of the parabolic reflector 13. It should be understood that in order to ensure that the focus of the parabolic reflector 13 is always located on the collector 2, each time the position of the parabolic reflector 13 is adjusted, the pitch angle of the parabolic reflector 13 can be adjusted by the angle adjustment component, so as to move the focus of the parabolic reflector 13 to the collector 2.

[0068] Optionally, the angle adjustment assembly includes a second drive motor 11 and a gear transmission assembly 12. The second drive motor 11 is arranged on the main bracket 9 for outputting torque. The gear transmission assembly 12 is connected between the second drive motor 11 and the hinge shaft of the parabolic reflector 13 for transmitting the torque to the hinge shaft so that it drives the parabolic reflector 13 to rotate.

[0069] Optionally, the tracking control unit 14 is also electrically connected to the angle adjustment component, and the tracking control unit 14 is also configured to monitor the angle of the parabolic reflector 13 and control the angle adjustment component according to the monitoring information. That is, in a specific implementation, the tracking control unit 14 can be used to monitor the angle of the parabolic reflector 13, and the angle adjustment component can be controlled according to the monitoring information to adjust the pitch angle of the parabolic reflector 13.

[0070] Optionally, the tracking control unit 14 uses one or more of an encoder, an inclination sensor, an accelerometer, etc. to monitor the pitch angle.

[0071] In the above scheme, the arc track 3, the rotating shaft 4 and the rotating platform 5 constitute the azimuth adjustment mechanism of the parabolic reflector 13, which is used to control the rotating platform 5 to rotate around the rotating shaft 4 to adjust the azimuth of the parabolic reflector 13. At the same time, the first slider 7, the second slider 8, the main bracket 9 and the auxiliary bracket 10 constitute the position adjustment mechanism of the parabolic reflector 13, which is used to control the relative or synchronous movement of the first slider 7 and the second slider 8 to adjust the height direction or horizontal direction of the parabolic reflector 13. In other words, the system uses low-cost, low-precision components to adjust the azimuth and position of the parabolic reflector 13, which can reduce the dependence on precision mechanical equipment, avoid the problem that the defects of structural accuracy and changes in use cannot be compensated or eliminated by the control system, and can reduce costs and improve the reliability of the system.

[0072] It should be noted that in the above embodiment, the tracking control unit performs control based on the knowledge of the sun's position or motion trajectory. Therefore, the tracking control unit may be configured with a sensor for real-time monitoring of the sun's position, such as a photodiode array, a camera, an inclination sensor, etc.

[0073] One or more embodiments of this specification are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of this application.

[0074] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fixed focus dish type concentrated solar collector system, characterized in that: include: Collector bracket, arc track, rotating table, rotating shaft, linear guide rail, first slider, second slider, main bracket, auxiliary bracket and tracking control unit; The collector bracket is fixedly arranged and used for installing the collector; The arc-shaped track is arranged around the collector bracket and is fixed relative to the collector bracket; The rotating shaft is arranged at the center of the arc track; The rotating platform is rotatably arranged on the rotating shaft and movably arranged on the arc track, and the rotating platform is arranged to be able to move on the arc track around the rotating shaft; The linear guide rail is arranged on the rotating table along the radial direction of the arc track; The first slider and the second slider are respectively movably arranged on the linear guide rail, and the first slider and the second slider are both arranged to be able to move along the linear guide rail; One end of the main bracket is hinged to the first slider, and the other end is used for hingedly connecting the parabolic reflector; One end of the auxiliary bracket is hinged to the second slider, and the other end is hinged to the main bracket; The tracking control unit is electrically connected to the rotating table, the first slider and the second slider respectively, and is configured to monitor the orientation of the parabolic reflector and its position relative to the collector, and control the rotating table, the first slider and the second slider according to the monitoring information.

2. The fixed focus dish type concentrated solar collector system according to claim 1, characterized in that: The rotating table is provided with a rotating wheel and a first driving motor. The rotating table is movably arranged on the arc track through the rotating wheel. The first driving motor is connected to the rotating wheel. The first driving motor is used to drive the rotating wheel to rotate so as to drive the rotating table to move on the arc track around the rotating axis.

3. The fixed focus dish type concentrated solar collector system according to claim 1, characterized in that: The first slider and the second slider are both electric sliders.

4. The fixed focus dish type concentrated solar collector system according to claim 1, characterized in that: The main support and the auxiliary support each include two support rods and a plurality of connecting rods, the two support rods are parallel to each other, and the plurality of connecting rods are respectively connected between the two support rods and arranged at intervals.

5. The fixed focus dish type concentrated solar collector system according to claim 1, characterized in that: It also includes an angle adjustment component, which is connected between the main support and the parabolic reflector, and the angle adjustment component is configured to output torque to adjust the pitch angle of the parabolic reflector.

6. The fixed focus dish type concentrated solar collector system according to claim 5, characterized in that: The angle adjustment assembly includes a second drive motor and a gear transmission assembly. The second drive motor is arranged on the main bracket for outputting torque. The gear transmission assembly is connected between the second drive motor and the hinge shaft of the parabolic reflector for transmitting the torque to the hinge shaft so that it drives the parabolic reflector to rotate.

7. The fixed focus dish type concentrated solar collector system according to claim 5, characterized in that: The tracking control unit is also electrically connected to the angle adjustment component, and the tracking control unit is also configured to monitor the angle of the parabolic reflector and control the angle adjustment component according to the monitoring information.

8. A control method for a fixed-focus dish-type concentrating solar collector system, applicable to the fixed-focus dish-type concentrating solar collector system according to any one of claims 1 to 7, characterized in that: include: Monitoring the orientation of the parabolic reflector, and controlling the rotating platform to rotate around the rotating axis according to the monitoring information to adjust the orientation of the parabolic reflector; The position of the parabolic reflector relative to the collector is monitored, and the movement of the first slider and the second slider is controlled according to the monitoring information to adjust the position of the parabolic reflector relative to the collector in the height direction and the horizontal direction.

9. The method according to claim 8, characterized in that The controlling the movement of the first slider and the second slider according to the monitoring information to adjust the position of the parabolic reflector relative to the collector in the height direction and the horizontal direction includes: Controlling the relative movement of the first slider and the second slider to adjust the position of the parabolic reflector relative to the height direction of the collector; The first slider and the second slider are controlled to move synchronously to adjust the horizontal position of the parabolic reflector relative to the collector.

10. The method according to claim 8, characterized in that The fixed-focus dish-type concentrating heat collection system further includes an angle adjustment component for adjusting the pitch angle of the parabolic reflector; the method further includes: The angle of the parabolic reflector is monitored, and the angle adjustment component is controlled according to the monitoring information to adjust the pitch angle of the parabolic reflector.

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