Double-shaft groove type photo-thermal collector

Abstract

The utility model belongs to the technical field of heat collectors, and discloses a double-shaft groove type photo-thermal heat collector which comprises a stand column, an orthogonal speed reducer device, a torque tube, a groove mirror assembly, a heat collecting tube and the like, and the orthogonal speed reducer device is arranged at the top of the stand column. The outer side of the orthogonal speed reducer device is connected with the center of the torque tube; a plurality of crescent supporting wings are arranged on the two sides of the center of the torque tube at equal intervals, and the torque tube is sleeved with the supporting wings. A plurality of purlines are arranged on the two sides of the axis of the torque tube at equal intervals, the axis of each purline is parallel to the axis of the torque tube, and each purline is fixedly connected to the inner sides of the supporting wings. A groove mirror assembly is arranged on the purline; a heat collecting pipe is arranged on the axis of the groove mirror assembly, and the two ends of the heat collecting pipe are connected to the two ends of the torque pipe through supports respectively. The device supports double-shaft tracking rotation of multiple groups of large groove mirrors, and is stable in structure, easy and convenient to install, and higher in control precision, operation efficiency and heat collection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of solar collector technology, specifically a dual-slot solar thermal collector. Background Technology

[0002] With the continuous growth of global energy demand and the increasing severity of environmental problems, solar energy, as a clean and renewable energy source, has received widespread attention for its development and utilization.

[0003] As one of the core devices for solar thermal utilization, the performance of solar thermal collectors directly affects the efficiency and economic benefits of solar thermal power generation systems.

[0004] Traditional parabolic trough solar collectors mostly use a single-axis tracking system, which cannot achieve omnidirectional tracking of sunlight, thus limiting their heat collection efficiency and applicability, with a heat collection efficiency of only about 55%.

[0005] Currently, dual-axis solar thermal collectors, by introducing a dual-axis tracking system, achieve synchronous rotation of the sun's azimuth and elevation angles, enabling more precise tracking of the sun's position and improving heat collection efficiency.

[0006] However, existing biaxial solar thermal collector devices cannot support multiple sets of large arc-shaped trough mirrors, and are complex in structure, difficult to install, costly, and have poor precision.

[0007] In addition, the existing biaxial disc solar thermal collectors and biaxial slot solar thermal collectors cannot guarantee that one end of the collector tube is facing upwards, so they cannot directly heat the medium to generate steam. Utility Model Content

[0008] The purpose of this invention is to provide a dual-slot solar thermal collector to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A biaxial slotted solar thermal collector includes a column, an orthogonal reducer device, a torque tube, support wings, purlins, a slotted mirror assembly, and a collector tube;

[0011] An orthogonal speed reducer device is installed at the top of the column;

[0012] The outer side of the orthogonal reducer is connected to the center of the torque tube;

[0013] Multiple crescent-shaped support wings are equidistantly arranged on both sides of the center of the torque tube, and the support wings are sleeved on the torque tube.

[0014] Multiple purlins are equidistantly arranged on both sides of the axis of the torque tube. The axis of each purlin is parallel to the axis of the torque tube, and each purlin is fixedly connected to the inner side of the support wing.

[0015] The purlin is provided with a grooved mirror assembly;

[0016] The heat collection tube is arranged on the axis of the groove mirror assembly, and the two ends of the heat collection tube are respectively connected to the two ends of the torque tube through brackets.

[0017] More preferably, the slotted mirror assembly is composed of multiple arc-shaped slotted mirror groups, and the multiple arc-shaped slotted mirror groups are evenly distributed on the multiple purlins;

[0018] Each arc-shaped groove mirror assembly is composed of two arc-shaped groove mirrors joined together;

[0019] The arc-shaped groove mirror is connected to the purlin via a ceramic sheet.

[0020] More preferably, the orthogonal reducer device includes a support disposed on the top of the column, a housing connected to the outside of the support, and the housing being connected to the center of the torque tube;

[0021] The housing is equipped with a first geared motor and a second geared motor.

[0022] The drive end of the first geared motor is connected to a first worm gear;

[0023] The drive end of the second geared motor is connected to a second worm gear;

[0024] A synchronous belt is provided between the first worm gear and the second worm gear;

[0025] The first worm gear is connected to the housing;

[0026] The second worm gear is connected to the support.

[0027] More preferably, when the rotation angle of the first worm gear is 180°, the elevation angle rotates by 90°, which is a 45° orthogonal omnidirectional rotation;

[0028] The second worm gear rotates 360° in the horizontal plane.

[0029] More preferably, a dual-slot solar thermal collector also includes a controller;

[0030] One end of the heat collection tube is equipped with a level gauge and an exhaust valve;

[0031] The level gauge and the vent valve are electrically connected to the controller.

[0032] More preferably, the distance between the end of the heat collection tube equipped with the level gauge and the horizontal plane is greater than the distance between the end of the heat collection tube away from the level gauge and the horizontal plane.

[0033] More preferably, the orthogonal reducer device is equipped with an azimuth angle detection element and an elevation angle detection element;

[0034] The azimuth angle detector and the elevation angle detector are electrically connected to the controller, respectively.

[0035] More preferably, the azimuth angle detector and the elevation angle detector are one or more of a pulley encoder, tilt sensor or limiter.

[0036] More preferably, the support wing includes a first arc-shaped member, the arc head of the first arc-shaped member is connected to the arc head of the second arc-shaped member, and the arc tail of the first arc-shaped member is connected to the arc tail of the second arc-shaped member;

[0037] The distance between the first arc-shaped component and the second arc-shaped component gradually increases and then gradually decreases from the beginning to the end of the arc of the second arc-shaped component, and a support component is provided between the first arc-shaped component and the second arc-shaped component.

[0038] Compared with the prior art, the beneficial effects of this utility model are:

[0039] This utility model adopts a support mechanism consisting of a torque tube, a support wing, and purlins, which can support multiple sets of large arc-shaped groove mirrors. At the same time, the support structure can be quickly expanded according to actual needs to support more arc-shaped groove mirror sets. This support structure has high stability, large load capacity, reasonable layout, and is easy to install.

[0040] This invention utilizes an orthogonal reducer to ensure that the heat collection tubes are arranged at an angle during tracking, with one end always pointing upwards. The heat collection tubes can directly heat the heat transfer oil or water, preventing backflow of the heating medium. The heating medium can be automatically supplied with steam via an exhaust valve and level gauge at one end of the heat collection tubes.

[0041] This invention realizes a closed-loop control system for dual-axis tracking of sunlight through an azimuth angle detector, an elevation angle detector, an orthogonal reducer device, and a controller. It has high control accuracy and operating efficiency, and the light-gathering and heat-collecting efficiency can reach over 93%. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0043] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0044] Figure 3 This is an enlarged view of the arc-shaped groove mirror assembly of this utility model;

[0045] Figure 4 This is an enlarged view of the support wing of this utility model;

[0046] In the diagram: 1. Heat collector tube; 2. Liquid level gauge; 3. Vent valve; 4. Bracket; 5. Arc-shaped groove mirror; 6. Arc-shaped groove mirror assembly; 7. Purlin; 8. Support wing; 9. Torque tube; 10. Column; 11. First arc-shaped component; 12. Second arc-shaped component; 13. Support component; 14. Support; 15. Orthogonal reducer device. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installation" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0049] Example 1: As shown in the attached document Figure 1 and attached Figure 2As shown, this embodiment provides a biaxial slotted solar thermal collector, including a column 10, an orthogonal reducer device 15, a torque tube 9, support wings 8, purlins 7, a slotted mirror assembly, and a collector tube 1. The top of the column 10 is provided with the orthogonal reducer device 15. The outer side of the orthogonal reducer device 15 is connected to the center of the torque tube 9. Multiple crescent-shaped support wings 8 are equidistantly arranged on both sides of the center of the torque tube 9, and the support wings 8 are sleeved on the torque tube 9. Multiple purlins 7 are equidistantly arranged on both sides of the axis of the torque tube 9, and the axis of each purlin 7 is parallel to the axis of the torque tube 9. Each purlin 7 is fixedly connected to the inner side of the support wing 8. A slotted mirror assembly is provided on the purlin 7. A collector tube 1 is provided on the axis of the slotted mirror assembly, and the two ends of the collector tube 1 are respectively connected to the two ends of the torque tube 9 through brackets 4.

[0050] Specifically, the bottom of the column 10 is fixed to the precast concrete component by expansion bolts. The column 10 can be a cylindrical, square, or triangular prism structure, made of high-strength materials, and additional stabilizing devices can be installed on the bottom side of the column 10.

[0051] The torque tube 9 passes through the orthogonal reducer device 15 and is fixedly connected to its center position, bearing the torque and weight of the device during rotation. Support wings 8 are symmetrically arranged on both sides of the center position of the torque tube 9, with multiple support wings 8 fitted onto the torque tube 9 to increase the stability and rigidity of the support structure. The support wings 8 are designed with a crescent shape, which effectively disperses the stress during rotation and improves the overall stability of the device.

[0052] Purlins 7 are symmetrically arranged on both sides of the axis of torque tube 9 to support the mirror assembly and also to connect multiple support wings 8. Purlins 7 are made of high-strength, corrosion-resistant materials, such as corrosion-resistant flat steel, to ensure the stability of the entire support structure.

[0053] The trough mirror assembly is used to reflect sunlight onto the heat collection tube 1. The inner arc surface formed by multiple support wings 8 is adapted to the outer arc surface of the trough mirror assembly. The trough mirror assembly is evenly laid on the inner arc surface formed by multiple support wings 8 and is fixedly connected to the purlin 7.

[0054] The collector tube 1 can be a vacuum collector tube 1, with heat-conducting oil or water added inside, to absorb sunlight reflected by the trough mirror assembly and convert it into steam heat energy. When the collector tube 1 is long, a support 4 can be added to the outside of the orthogonal reducer device 15 and at the center of the collector tube 1 to ensure the stability and safety of the collector tube 1 during rotation.

[0055] Example 2: As shown in the attached document Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4As shown, based on Embodiment 1, this embodiment provides a biaxial slotted solar thermal collector. The slotted mirror assembly consists of multiple arc-shaped slotted mirror groups 6, which are evenly arranged on multiple purlins 7. Each arc-shaped slotted mirror group 6 is formed by splicing two arc-shaped slotted mirrors 5. The arc-shaped slotted mirrors 5 are connected to the purlins 7 through ceramic sheets.

[0056] Preferably, two arc-shaped groove mirrors 5 are joined at their ends to form an arc-shaped groove mirror assembly 6, the curvature of which matches the curvature of the supporting wing 8. Multiple sets of arc-shaped groove mirror assemblies 6 are evenly distributed on the inner side of the arc surface formed by multiple supporting wings 8, and connected to the purlin 7 via ceramic sheets. The heat shrinkage ratio of the ceramic sheets matches that of the arc-shaped groove mirrors 5, facilitating the stability of the connection between the arc-shaped groove mirrors 5 and the purlin 7 during heat collection. This device supports large-aperture groove mirrors with a diameter of 5.77m.

[0057] The orthogonal reducer device 15 includes a support 14 mounted on the top of the column 10, a housing connected to the outside of the support 14, and the housing being connected to the center of the torque tube 9; a first reducer motor and a second reducer motor are mounted inside the housing; a first worm gear is connected to the drive end of the first reducer motor; a second worm gear is connected to the drive end of the second reducer motor; a synchronous belt is provided between the first worm gear and the second worm gear; the first worm gear is connected to the housing; and the second worm gear is connected to the support 14.

[0058] Specifically, the torque tube 9 can pass through the housing and be fixedly connected to it. Both the first and second geared motors are 24x stepper motors, and both the first and second worm gears are 90x reduction worm gears.

[0059] When the first worm gear rotates at a 180° angle, the elevation angle rotates by 90°, resulting in a 45° orthogonal omnidirectional rotation; the second worm gear rotates at a 360° horizontal angle. The simultaneous rotation of the elevation and azimuth angles is ensured by using a synchronous belt.

[0060] The support wing 8 includes a first arc-shaped component 11, the arc head of the first arc-shaped component 11 is connected to the arc head of the second arc-shaped component 12, and the arc tail of the first arc-shaped component 11 is connected to the arc tail of the second arc-shaped component 12, for example, by welding or bolts.

[0061] The distance between the first arc-shaped member 11 and the second arc-shaped member 12 gradually increases and then decreases from the beginning to the end of the arc of the second arc-shaped member 12, forming a crescent-shaped structure. A support member 13 is provided between the first arc-shaped member 11 and the second arc-shaped member 12 to enhance the stability and load-bearing capacity of the support wing 8. The support members 13 can be evenly distributed and connected by welding or bolts to form a stable support structure.

[0062] Example 3: As shown in the attached document Figure 1 and attached Figure 2 As shown, based on Embodiment 2, this embodiment provides a dual-slot solar thermal collector, which also includes a controller; one end of the collector tube 1 is provided with a level gauge 2 and an exhaust valve 3; the level gauge 2 and the exhaust valve 3 are electrically connected to the controller.

[0063] The controller is the core component of the entire dual-axis tracking control system. It is responsible for receiving and processing signals from various sensors and outputting corresponding control commands based on the integrated dual-axis tracking control model. The level gauge 2 is used to monitor the level of the heating medium inside the collector tube 1 in real time, ensuring that the collector tube 1 is always filled with heating medium. The vent valve 3 is used to release some of the hot steam inside the collector tube 1 when the internal pressure is too high, preventing damage to the collector tube 1 due to excessive pressure. Both the level gauge 2 and the vent valve 3 are electrically connected to the controller and work together to achieve real-time monitoring and control of the internal working status of the collector tube 1.

[0064] The heat collector tube 1 is arranged at an angle, meaning that the distance between the end of the heat collector tube 1 equipped with the level gauge 2 and the horizontal plane is greater than the distance between the end of the heat collector tube 1 furthest from the level gauge 2 and the horizontal plane. This is achieved through an orthogonal reducer device 15 and a controller. This allows the heating medium to be directly added into the heat collector tube 1 to generate steam, preventing the heating medium from potentially escaping from the exhaust valve 3 when the end with the level gauge 2 is facing downwards. It also prevents the level gauge 2 from failing to accurately measure the liquid level of the medium inside the heat collector tube 1.

[0065] The orthogonal reducer device is equipped with azimuth angle detection devices and elevation angle detection devices at 15 locations; the azimuth angle detection device is used to detect the azimuth angle of the twin-slot solar thermal collector; the elevation angle detection device is used to detect the elevation angle of the twin-slot solar thermal collector; the azimuth angle detection device and the elevation angle detection device are electrically connected to the controller respectively.

[0066] The azimuth and elevation angle detection devices are one or more of the following: pulley encoders, tilt sensors, or limit switches. The pulley encoder determines the azimuth and elevation angle values ​​by detecting the number of rotations and direction of the device. The tilt sensor can be directly used to measure the azimuth and elevation angle values. The limit switch measures the azimuth and elevation angle values ​​by setting the rotation range of the device.

[0067] The azimuth and elevation angle sensors are connected to and cooperate with the controller to realize a feedback control system for dual-axis tracking. This system provides real-time feedback of the detected azimuth and elevation angle information, allowing the controller to make real-time adjustments. Furthermore, in conjunction with the orthogonal reducer device 15, it achieves a closed-loop control system for the entire dual-axis tracking system, resulting in higher control accuracy and operational efficiency.

[0068] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0069] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dual-slot solar thermal collector, characterized in that, It includes a column (10), an orthogonal reducer device (15), a torque tube (9), a support wing (8), a purlin (7), a slot mirror assembly, and a heat collection tube (1); An orthogonal speed reducer device (15) is provided on the top of the column (10); The outer side of the orthogonal reducer device (15) is connected to the center of the torque tube (9); Multiple crescent-shaped support wings (8) are equidistantly arranged on both sides of the center of the torque tube (9), and the support wings (8) are sleeved on the torque tube (9); Multiple purlins (7) are equidistantly arranged on both sides of the axis of the torque tube (9). The axis of each purlin (7) is parallel to the axis of the torque tube (9), and each purlin (7) is fixedly connected to the inner side of the support wing (8). A grooved mirror assembly is provided on the purlin (7); The heat collection tube (1) is arranged on the axis of the groove mirror assembly, and the two ends of the heat collection tube (1) are respectively connected to the two ends of the torque tube (9) through the bracket (4).

2. The dual-slot solar thermal collector according to claim 1, characterized in that, The slotted mirror assembly is composed of multiple arc-shaped slotted mirror groups (6), and the multiple arc-shaped slotted mirror groups (6) are evenly arranged on the multiple purlins (7); Each arc-shaped groove mirror assembly (6) is composed of two arc-shaped groove mirrors (5) joined together; The arc-shaped groove mirror (5) is connected to the purlin (7) through a ceramic sheet.

3. A dual-slot solar thermal collector according to claim 1, characterized in that, The orthogonal reducer device (15) includes a support (14) disposed on the top of the column (10), and a housing is connected to the outside of the support (14), and the housing is connected to the center of the torque tube (9). The housing is equipped with a first geared motor and a second geared motor. The drive end of the first geared motor is connected to a first worm gear; The drive end of the second geared motor is connected to a second worm gear; A synchronous belt is provided between the first worm gear and the second worm gear; The first worm gear is connected to the housing; The second worm gear is connected to the support (14).

4. A dual-slot solar thermal collector according to claim 3, characterized in that, When the rotation angle of the first worm gear is 180°, the elevation angle rotates by 90°, which is a 45° orthogonal universal rotation; The second worm gear rotates 360° in the horizontal plane.

5. A biaxial slotted solar thermal collector according to claim 1, characterized in that, It also includes the controller; One end of the heat collection tube (1) is equipped with a level gauge (2) and an exhaust valve (3); The level gauge (2) and the exhaust valve (3) are electrically connected to the controller.

6. A biaxial slotted solar thermal collector according to claim 5, characterized in that, The distance between the end of the heat collection tube (1) equipped with the liquid level gauge (2) and the horizontal plane is greater than the distance between the end of the heat collection tube (1) away from the liquid level gauge (2) and the horizontal plane.

7. A biaxial slotted solar thermal collector according to claim 5, characterized in that, An azimuth angle detection element and an elevation angle detection element are provided at the orthogonal reducer device (15); The azimuth angle detector and the elevation angle detector are electrically connected to the controller, respectively.

8. A biaxial slotted solar thermal collector according to claim 7, characterized in that, The azimuth angle detector and the elevation angle detector are both one or more of the following: pulley encoder, tilt sensor or limiter.

9. A biaxial slotted solar thermal collector according to claim 1, characterized in that, The support wing (8) includes a first arc-shaped member (11), the arc head of the first arc-shaped member (11) is connected to the arc head of the second arc-shaped member (12), and the arc tail of the first arc-shaped member (11) is connected to the arc tail of the second arc-shaped member (12). The distance between the first arc-shaped member (11) and the second arc-shaped member (12) gradually increases and then gradually decreases from the beginning to the end of the arc of the second arc-shaped member (12). A support member (13) is provided between the first arc-shaped member (11) and the second arc-shaped member (12).

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