Trough collector with top concentration

Abstract

This utility model relates to the technical field of solar thermal collectors. It provides a top-concentrating trough-type solar collector, comprising a support frame with a collector tube mounted on it; a collector lens mounted on the support frame above the collector tube to concentrate sunlight onto the top of the collector tube for heating; a fixed reflective base plate on the support frame, located below the collector tube; and two symmetrical reflective side plates that swing on the support frame. Both the fixed reflective base plate and the reflective side plates reflect sunlight to the bottom of the collector tube for heating. The reflective side plates are configured such that when they swing closer together, they block the top of the fixed reflective base plate; when they swing away, they release the blockage, increasing the total reflective area. This technical solution solves the problems of limited heating efficiency and poor stability in existing bottom-concentrating solar collectors due to environmental influences.

Description

Technical Field

[0001] This utility model relates to the field of solar thermal collector technology, specifically to a trough-type solar collector capable of top-concentrating light. Background Technology

[0002] Concentrating solar collectors, as key equipment for solar thermal utilization, concentrate sunlight onto collector tubes through reflective elements to achieve efficient heat collection. They are widely used in solar water heating systems, solar heating, and industrial and agricultural heating. In existing technologies, concentrating collectors mostly employ a bottom-concentrating structure design. Their reflective collector plates are typically concave or have other shapes that facilitate bottom-concentration, with the collector tubes positioned above the reflective collector plate. After sunlight hits the reflective collector plate, most of the light is reflected and converges at the bottom of the collector tubes, thus heating the bottom of the tubes. However, this bottom-concentrating method has obvious shortcomings: on the one hand, since the light is mainly concentrated at the bottom of the collector tube, less heat is received at the top of the collector tube, and a large amount of heat only accumulates at the bottom. The top is prone to heat loss due to heat dissipation and other reasons, resulting in low overall heat utilization efficiency of the collector tube and difficulty in fully utilizing its heat collection efficiency; on the other hand, in order to achieve bottom concentrating, the reflective collector plate often needs to adopt a bottom-expanded structure. In windy conditions, this structure has a large windward area, which significantly increases the wind load and makes it prone to swaying, deformation, or even damage, seriously affecting the stability and reliability of the collector under complex outdoor weather conditions. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a top-concentrating trough solar collector, which solves the problems of limited heating efficiency and poor stability of the bottom-concentrating solar collector in the prior art due to environmental influences.

[0004] According to one aspect, at least one embodiment of the present invention provides a top-concentrating trough solar collector, comprising: Support frame, on which heat collection pipes are provided; A heat-collecting lens is mounted on the support frame and located above the heat-collecting tube. It is used to concentrate sunlight onto the top of the heat-collecting tube to heat the heat-collecting tube. The support frame is equipped with a fixed reflective base plate located below the heat collection tube. The support frame is also equipped with two symmetrical reflective side plates that swing back and forth. Both the fixed reflective base plate and the reflective side plates are used to reflect sunlight to the bottom of the heat collection tube to heat the heat collection tube. The reflective side plates are configured such that when they swing close to each other, they block the top of the fixed reflective base plate, and when they swing away from each other, they no longer block the fixed reflective base plate, thereby increasing the total reflective area of ​​both.

[0005] For example, at least one embodiment of the present disclosure provides a top-focusing trough-type solar collector, wherein the support frame includes a fixed base frame and two symmetrically arranged lifting frames, both of which are movably and vertically mounted on the fixed base frame, the two ends of the solar collector tube and the solar collector lens are respectively mounted on the two lifting frames, and the fixed reflective base plate and the reflective side plate are both mounted on the fixed base frame.

[0006] For example, at least one embodiment of the present disclosure provides a top-focusing trough solar collector, wherein a receiving space is provided at the center of the fixed base frame, the fixed reflective base plate is located in the receiving space, the two reflective side plates are configured to swing close together and enter the receiving space, and the lifting frame is configured to slide down and enter the receiving space.

[0007] For example, at least one embodiment of this disclosure provides a top-focusing trough solar collector, wherein the reflective side plate consists of two hinged separate side plates, and the two separate side plates are configured such that the included angle between them decreases after swinging, so that the focal points of their reflections are brought closer together.

[0008] For example, in at least one embodiment of the present disclosure, a top-focusing trough-type solar collector is provided, wherein the upper surface of the fixed reflective base plate is provided with a first shaping protrusion and a second shaping protrusion, and the reflective side plate is configured such that, after swinging into the receiving space, the bottom of the two separate side plates abuts against the first shaping protrusion and the second shaping protrusion respectively, so as to reduce the included angle of the two separate side plates, thereby reducing the height of the focal point of their reflection.

[0009] For example, in at least one embodiment of the present disclosure, a top-focusing trough-type solar collector is provided, wherein the fixed reflective base plate is arc-shaped, and when the included angle between the two separate side plates is at its maximum, the resulting reflective side plate is an arc-shaped plate with the same curvature as the fixed reflective base plate.

[0010] For example, in at least one embodiment of the present disclosure, a top-focusing trough solar collector is provided, wherein the bottom of each of the two separate side plates is provided with an abutment block, and the separate side plates abut against the first shaping protrusion and the second shaping protrusion through the abutment block.

[0011] For example, at least one embodiment of this disclosure provides a top-focusing trough solar collector in which two lifting frames are mounted on a synchronous connecting frame, and a linear drive is provided on the fixed base frame. The linear drive is used to drive the synchronous connecting frame to move up and down synchronously, thereby driving the two lifting frames to move up and down synchronously.

[0012] For example, at least one embodiment of this disclosure provides a top-focusing trough solar collector in which a first connecting rod is hinged to a fixed base frame, the other end of the first connecting rod being coaxially hinged to two of the separate side plates, a second connecting rod is hinged to a synchronous connecting frame, the other end of the second connecting rod being hinged to the first connecting rod, and the synchronous connecting frame is configured such that, after being raised and lowered and slid, the reflective side plates are oscillating via the second connecting rod and the first connecting rod.

[0013] For example, the top-concentrating trough solar collector provided in at least one embodiment of this disclosure further includes: The swing base, wherein the support frame is swingably mounted on the swing base, and the support frame is configured such that, after swinging, it drives the heat-collecting lens, the fixed reflective base plate and the reflective side plate to swing along the trajectory of the sun.

[0014] The beneficial effects of the embodiments of this utility model are as follows: In this invention, the heat-collecting lens is positioned above the heat-collecting tube, directly concentrating sunlight onto the top of the tube, preventing heat loss from the top. Combined with the heating effect of the fixed reflective base plate on the bottom, this results in more uniform heating of the entire heat-collecting tube, improving thermal efficiency. The fixed reflective base plate, combined with two symmetrical reflective side plates, allows for an increase in the total reflective area when needed by oscillating the reflective side plates, enhancing the heating effect on the bottom of the heat-collecting tube. In windy conditions, the reflective side plates move closer together and oscillate, blocking the area above the fixed reflective base plate, reducing the windward area of ​​the overall structure and mitigating the impact of wind on the equipment. Combined with the fixing effect of the support frame, this improves the stability of the equipment in windy environments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a top-focusing trough-type solar collector in one embodiment of the present invention. Figure 2 This is another structural schematic diagram of a top-focusing trough solar collector in one embodiment of the present invention (with hidden swing base). Figure 3 for Figure 2 A partial enlarged structural diagram of part A in the embodiment; Figure 4 for Figure 2 A schematic diagram showing the endpoint of the change in the included angle between the two reflective side plates in the embodiment; Figure 5 for Figure 4 A magnified schematic diagram of part B in the middle section.

[0017] In the diagram: Support frame-1, Accommodation space-101, Fixed base frame-110, Lifting frame-120, Heat collection tube-2, Heat collection lens-3, Fixed reflective base plate-4, First shaping protrusion-401, Second shaping protrusion-402, Reflective side plate-5, Split side plate-510, Abutment block-511, Synchronous connecting frame-6, First connecting rod-7, Second connecting rod-8, Swinging base-9. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0019] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-5 As shown, this is an embodiment of the present invention, illustrating a top-focusing trough-type solar collector. A solar collector tube 2 is mounted on a support frame 1, and a solar collector lens 3 is mounted on the support frame 1 and positioned directly above the solar collector tube 2. A fixed reflective base plate 4 is fixed to the support frame 1 and located directly below the solar collector tube 2. Two reflective side plates 5 are symmetrically hinged to the support frame 1 and distributed on both sides of the fixed reflective base plate 4.

[0025] Sunlight is directly focused onto the top of the heat collection tube 2 via the heat collection lens 3, while the fixed reflective base plate 4 and reflective side plates 5 reflect the sunlight to the bottom of the heat collection tube 2, forming a synergistic heating structure of top focusing and bottom reflection. The swing function of the reflective side plates 5 can adjust the total reflective area to adapt to different lighting conditions. Working process: When sunlight is shining, the heat collection lens 3 focuses sunlight onto the top of the heat collection tube 2; the fixed reflective base plate 4 reflects sunlight to the bottom of the heat collection tube 2. If it is necessary to enhance bottom heating, the reflective side plates 5 swing away from each other to increase the total reflective area to reflect more sunlight; when in a windy environment, the reflective side plates 5 swing closer to each other, blocking the fixed reflective base plate 4 and reducing the overall windward area.

[0026] The heat-collecting lens 3 is positioned above the heat-collecting tube 2, directly concentrating sunlight onto the top of the tube, preventing heat loss from the top. Combined with the heating effect of the fixed reflective base plate 4 on the bottom, this ensures more uniform heating of the heat-collecting tube 2 and improves thermal efficiency. The fixed reflective base plate 4, together with two symmetrical reflective side plates 5, allows for increased total reflective area when needed by oscillating, enhancing the heating effect on the bottom of the heat-collecting tube 2. In windy conditions, the reflective side plates 5 move closer together and oscillate, blocking the area above the fixed reflective base plate 4, reducing the overall structure's windward area and mitigating the impact of wind on the equipment. Combined with the fixing effect of the support frame 1, this improves the stability of the equipment in windy environments.

[0027] In some examples, the support frame 1 includes a fixed base frame 110 and two symmetrical lifting frames 120. The two lifting frames 120 are respectively connected to the fixed base frame 110 and can move up and down along the fixed base frame 110. The two ends of the heat collection tube 2 are respectively mounted on the two lifting frames 120, and the two ends of the heat collection lens 3 are also correspondingly mounted on the two lifting frames 120. The fixed reflective base plate 4 is fixed to the fixed base frame 110, and the two reflective side plates 5 are symmetrically swaying and mounted on the fixed base frame 110 and located on both sides of the fixed reflective base plate 4.

[0028] The height of the heat collection tube 2 and the heat collection lens 3 is adjusted by the lifting and lowering movement of the lifting frame 120. The downward movement lowers the overall center of gravity and reduces the windward area to adapt to strong winds. At the same time, the fixed reflective base plate 4 and reflective side plate 5 on the fixed base frame 110 remain stable to continuously reflect sunlight to the bottom of the heat collection tube 2, forming a synergistic heating structure that combines height adjustment and wind resistance. Working process: In a strong wind environment, the two lifting frames 120 are driven to descend synchronously along the fixed base frame 110, which lowers the height of the heat collection tube 2 and the heat collection lens 3. The heat collection lens 3 continues to concentrate and heat the top of the heat collection tube 2 as the height is adjusted. The fixed reflective base plate 4 and reflective side plate 5 on the fixed base frame 110 continue to reflect and heat the bottom of the heat collection tube 2. The reflective side plate 5 swings synchronously towards each other to further reduce the windward area.

[0029] The fixed base frame 110 of the support frame 1 provides stable support for the fixed reflective base plate 4 and the reflective side plate 5, ensuring that their reflection functions are stable. Two symmetrical lifting frames 120 can simultaneously lower the heat collection tube 2 and the heat collection lens 3. By reducing the height, the windward area of ​​the overall structure is reduced, and the center of gravity is lowered. Combined with the swinging motion of the reflective side plate 5, this significantly reduces wind load in high-wind environments and improves the overall stability of the equipment. The combined structure of the lifting frame 120 and the fixed base frame 110 ensures that the height adjustment of the heat collection tube 2 and the heat collection lens 3 does not affect the positional stability of the fixed reflective base plate 4 and the reflective side plate 5. While enhancing wind resistance, this ensures the continuous and reliable synergistic heating function of top focusing and bottom reflection, improving the equipment's adaptability under complex weather conditions.

[0030] In some examples, the central region of the fixed base 110 forms a receiving space 101, and the fixed reflective base plate 4 is fixed inside the receiving space 101. Two reflective side plates 5 are hinged to the fixed base 110 and located on either side of the receiving space 101; when they swing towards each other, the entire structure enters the receiving space 101. Two lifting frames 120 are connected to the fixed base 110, and as they slide down along the fixed base 110, the entire structure enters the receiving space 101. The heat collection tube 2 and the heat collection lens 3 enter the receiving space 101 simultaneously with the lifting frames 120.

[0031] The fixed base frame 110 provides a storage area for the fixed reflective base plate 4, reflective side plates 5, and lifting frame 120. When it is necessary to reduce the overall windward area, the movable parts can be folded into the space to form a compact structure. Work process: In a windy environment, the reflective side plates 5 swing towards each other and enter the storage space 101; at the same time, the lifting frame 120 descends along the fixed base frame 110, bringing the heat collection pipe 2 and heat collection lens 3 into the storage space 101. At this time, the fixed reflective base plate 4, reflective side plates 5, lifting frame 120, heat collection pipe 2, and heat collection lens 3 are all within the storage space 101 or within its coverage area. When normal heat collection is required, the lifting frame 120 rises and moves out of the storage space 101, the reflective side plates 5 swing away from each other and move out of the storage space 101, and the fixed reflective base plate 4 remains within the storage space 101 to achieve the reflection function.

[0032] The fixed base frame 110 provides a fixed mounting position for the reflective base plate 4, protecting its reflective surface from external structural interference and ensuring stable reflection of the bottom of the heat collection tube 2. The reflective side plate 5 moves closer to the swaying mechanism and enters the accommodating space 101, cooperating with the lowering frame 120 to descend into this space. This allows the heat collection tube 2, heat collection lens 3, and reflective side plate 5, originally located externally, to be retracted into the accommodating space 101, significantly reducing the overall exposed volume and windward area of ​​the equipment, and lowering the wind load in high-wind conditions. The lowering frame 120 and reflective side plate 5 are both housed within the accommodating space 101, lowering the equipment's center of gravity and making the structure more compact. Combined with the support of the fixed base frame 110, this further enhances the stability of use in high-wind conditions. Simultaneously, the retraction and removal of each component are all achieved within the accommodating space 101, ensuring that during adjustments, the relative positions of the heat collection lens 3 and the heat collection tube 2, as well as the reflection path of the reflective components, remain reasonable and do not affect the thermal efficiency during normal heat collection.

[0033] In some examples, the reflective side plate 5 consists of two separate side plates 510 connected by a hinge shaft, forming a structure that can swing relative to each other. The ends of the two separate side plates 510 furthest from the hinge shaft are respectively sway-connected to the fixed base 110 of the support frame 1. Utilizing the hinge structure of the two separate side plates 510, the convergence direction of the reflected light is adjusted by changing the included angle between them, allowing the reflective focal point to move as needed. Workflow: When the required focal point is away from the bottom of the heat collector tube 2, the two separate side plates 510 swing around the hinge shaft, increasing the included angle between them, and the convergence point of the reflected light moves away from the heat collector tube 2; when the required focal point is close to the bottom of the heat collector tube 2, the two separate side plates 510 swing, decreasing the included angle, and the convergence point of the reflected light moves closer to the heat collector tube 2, adapting to the heating requirements of the bottom of the heat collector tube 2.

[0034] The reflective side plate 5 adopts a structure of two hinged split side plates 510. By swinging and adjusting the angle between the two, the distance of the reflective focal point can be adjusted. When the focal point is close to the bottom of the heat collector tube 2, the local heating intensity of the bottom of the heat collector tube 2 can be enhanced. Combined with the focused heating of the top by the heat collector lens 3, the overall heat absorption efficiency of the heat collector tube 2 can be further improved. When the focal point is far away, the bottom heating range can be expanded to adapt to the positional changes of the heat collector tube 2 caused by the adjustment of the lifting frame 120, ensuring that the reflected light can always effectively act on the bottom area of ​​the heat collector tube 2. This adjustable structure, combined with the fixed reflection function of the fixed reflective base plate 4, makes the bottom heating more adaptable and improves the heat utilization effect of the equipment under different operating conditions.

[0035] In some examples, the upper surface of the fixed reflective base plate 4 is provided with a first shaping protrusion 401 and a second shaping protrusion 402, which are spaced apart. The reflective side plate 5 consists of two hinged split side plates 510, and the hinge joint of the two split side plates 510 is connected to the fixed base frame 110 of the support frame 1. When the reflective side plate 5 swings into the receiving space 101, the bottom of the two split side plates 510 contacts and abuts against the first shaping protrusion 401 and the second shaping protrusion 402, respectively.

[0036] The first shaping protrusion 401 and the second shaping protrusion 402 form a supporting limit on the bottom of the split side plate 510. The swing angle of the split side plate 510 is limited by the abutment action, so that the included angle between the two split side plates 510 gradually decreases with the abutment depth, thereby changing the focal point height of the reflected light. Work process: When the reflective side plate 5 swings into the receiving space 101, the bottom of the split side plate 510 gradually approaches the upper surface of the fixed reflective base plate 4, and finally abuts against the first shaping protrusion 401 and the second shaping protrusion 402 respectively. Under the abutment force, the hinge angle of the two split side plates 510 decreases, and the focal point height of their reflected light decreases accordingly.

[0037] The first and second shaping protrusions 401 and 402 on the fixed reflective base plate 4 provide a clear abutment and positioning structure for the split side plate 510, ensuring that the included angle between the two split side plates 510 can be stably reduced when the reflective side plate 5 swings into the receiving space 101, avoiding the deviation of the reflection focal point caused by angular deviation during the swing. When the lifting frame 120 descends into the receiving space 101 and lowers the position of the heat collection tube 2, the reduced included angle formed by the abutment of the split side plates 510 can synchronously lower the height of the reflection focal point, ensuring that the reflected light can still be effectively focused on the bottom of the heat collection tube 2, maintaining the bottom heating effect. At the same time, the abutment between the protrusions and the split side plate 510 enhances the structural stability of the reflective side plate 5 within the receiving space 101, reduces swaying in windy conditions, and further improves the overall wind resistance of the equipment.

[0038] In some examples, the fixed reflective base plate 4 has an arc-shaped structure, with its curvature extending along its length. The two separate side plates 510 of the reflective side plate 5 are connected by a hinge shaft, and the included angle between them can vary. When the included angle between the two separate side plates 510 reaches its maximum value, the outer surfaces of the two separate side plates 510 together form an arc-shaped surface with the same curvature as the fixed reflective base plate 4, and the center of curvature of this arc-shaped surface coincides with the center of curvature of the fixed reflective base plate 4.

[0039] By setting the maximum unfolded arc of the fixed reflective base plate 4 and the reflective side plate 5 to be the same, they form a continuous arc-shaped reflective surface when the reflective side plate 5 is unfolded to its maximum angle. Utilizing the light-concentrating characteristics of the arc-shaped reflective surface, sunlight is reflected and focused onto the bottom of the heat collection tube 2. Working process: When it is necessary to increase the reflective area, the two separate side plates 510 are driven to swing outward, and the included angle gradually increases; when the included angle reaches its maximum value, the reflective side plate 5 forms an arc-shaped plate consistent with the fixed reflective base plate 4, together with the fixed reflective base plate 4 to form a continuous arc-shaped reflective surface, reflecting sunlight to the bottom of the heat collection tube 2.

[0040] The continuous arc-shaped reflective surface formed by the fixed reflective base plate 4 and the reflective side plate 5 in their maximum extended state effectively expands the reflective area, increases the amount of sunlight reflected, and thus improves the heat intensity at the bottom of the heat collector tube 2. The identical curvature allows the reflected light to be more concentrated at the bottom of the heat collector tube 2, reducing light scattering and further improving the light-gathering efficiency. Furthermore, the arc-shaped structure has higher structural strength than a planar structure, enhancing the deformation resistance of the reflective side plate 5 in its extended state. Especially in windy environments, this reduces the risk of structural damage caused by wind, ensuring the long-term stable operation of the equipment.

[0041] In some examples, both split side panels 510 have abutment blocks 511 fixedly provided at their bottoms, with the abutment blocks 511 extending along the length of the split side panels 510. When the reflective side panel 5 swings into the receiving space 101, the abutment block 511 of one split side panel 510 contacts the first shaping protrusion 401 of the fixed reflective base plate 4, and the abutment block 511 of the other split side panel 510 contacts the second shaping protrusion 402, forming an abutment engagement. The height of the abutment block 511 is higher than the bottom edge of the split side panel 510, so that the abutment point is located above the bottom edge of the split side panel 510.

[0042] By setting an abutment block 511 at the bottom of the split side plate 510, the abutment action between the split side plate 510 and the shaping protrusion is borne by the abutment block 511, avoiding direct contact and force on the split side plate 510 itself. At the same time, the raised structure of the abutment block 511 moves the abutment point upward, away from the hinge axis position between the split side plate 510 and the support frame 1, reducing interference between the split side plate 510 and the hinge axis during swinging. Working process: When the reflective side plate 5 swings into the receiving space 101, the abutment block 511 contacts the first shaping protrusion 401 and the second shaping protrusion 402 before the bottom of the split side plate 510. Under the abutment force, the two split side plates 510 rotate around the hinge axis, and the included angle gradually decreases. Since the abutment block 511 raises the abutment point, when the split side plate 510 rotates, there is no scraping obstruction between its part near the hinge axis and the hinge axis, and the swinging process is smooth.

[0043] The abutment block 511 replaces the split side plate 510 itself in abutting against the shaping protrusion, so that the split side plate 510 does not directly bear the abutment force, avoiding damage to the fragile split side plate 510 due to force and extending the service life of the split side plate 510. The raised structure of the abutment block 511 keeps the abutment point away from the hinge axis, reducing the relative motion interference between the split side plate 510 and the hinge axis when swinging, preventing scratches and obstacles, ensuring the smoothness of the swing adjustment of the reflective side plate 510, ensuring that it can stably increase or decrease the included angle, thereby ensuring the reliability of the reflective focus point adjustment and improving the overall operational stability of the equipment.

[0044] In some examples, a synchronous connecting frame 6 is erected between the tops of the two lifting frames 120, with both ends of the synchronous connecting frame 6 fixedly connected to the two lifting frames 120 respectively. A linear drive is mounted on the fixed base frame 110, with the output end of the linear drive connected to the synchronous connecting frame 6 and the fixed end of the linear drive connected to the fixed base frame 110.

[0045] Two lifting frames 120 are rigidly connected by a synchronous connecting frame 6, forming a linked structure. The linear drive outputs a linear driving force that acts on the synchronous connecting frame 6, causing it to move vertically. This linkage of the synchronous connecting frame 6 ensures that the two lifting frames 120 maintain a consistent lifting amplitude. Workflow: When the height of the heat collection tube 2 and the heat collection lens 3 needs adjustment, the linear drive is activated, extending or retracting its output end to push or pull the synchronous connecting frame 6 up or down. As the synchronous connecting frame 6 moves, it drives the two connected lifting frames 120 to rise and fall synchronously along the fixed base frame 110, ensuring that the height changes of the two lifting frames 120 are completely consistent.

[0046] The synchronous connecting frame 6 connects the two lifting frames 120 into a whole, avoiding the height deviation that may occur when a single lifting frame 120 moves independently. This ensures that both ends of the heat collection tube 2 and the heat collection lens 3 are always at the same horizontal height, ensuring a stable focusing position of the heat collection lens 3 on the top of the heat collection tube 2 and preventing focusing deviation caused by inconsistent heights at both ends. The linear drive directly drives the synchronous connecting frame 6, making the lifting movements of the two lifting frames 120 more synchronized, the adjustment process smoother, and reducing mechanical transmission errors. At the same time, synchronous lifting ensures that the heat collection tube 2 and the heat collection lens 3 are subjected to balanced forces, avoiding structural deformation caused by excessive forces on one side. Combined with the support of the fixed base frame 110, this improves the structural stability of the equipment during lifting and adjustment.

[0047] In some examples, the fixed base 110 is provided with a hinge seat, one end of the first connecting rod 7 is connected to the hinge seat through a hinge shaft, and the other end of the first connecting rod 7 is coaxially hinged to the hinge joints of the two split side plates 510 through the same hinge shaft. The synchronous connecting frame 6 is provided with a hinge ear, one end of the second connecting rod 8 is hinged to the hinge ear, and the other end of the second connecting rod 8 is hinged to the middle of the rod body of the first connecting rod 7.

[0048] A linkage mechanism is formed by the first link 7 and the second link 8, which converts the lifting motion of the synchronous connecting frame 6 into the swinging motion of the first link 7. Then, through the coaxial hinge relationship between the first link 7 and the split side plate 510, the two split side plates 510 are driven to swing synchronously to adjust the included angle. Working process: When the synchronous connecting frame 6 rises, it drives the second link 8 to move upward. The second link 8 pulls the first link 7 to swing upward around the hinge point of the fixed base frame 110. The first link 7 pushes the two split side plates 510 to rotate around their hinge axis, increasing the included angle between them. When the synchronous connecting frame 6 falls, the second link 8 moves downward, pushing the first link 7 to swing downward around the hinge point of the fixed base frame 110. The first link 7 pulls the two split side plates 510 to rotate, decreasing the included angle between them.

[0049] The linkage mechanism consisting of the first link 7 and the second link 8 achieves mechanical linkage between the lifting of the synchronous connecting frame 6 and the swinging of the reflective side plate 5, eliminating the need for separate driving of the reflective side plate 5 and simplifying the equipment structure. The lifting action of the synchronous connecting frame 6 is directly transmitted to the split side plate 510 through the link, so that the height adjustment of the heat collection tube 2 and the angle adjustment of the reflective side plate 5 are synchronized. This ensures that when the position of the heat collection tube 2 changes, the reflection focus point of the reflective side plate 5 always matches its bottom position, guaranteeing stable heating effect. The rigid connection of the link mechanism makes the swing adjustment more precise, reducing errors caused by manual adjustment or independent driving, while improving the overall structural integrity of the equipment during movement and enhancing its wind load resistance.

[0050] In some examples, it also includes: The swing base 9 and the support frame 1 are swing-mounted on the swing base 9. The support frame 1 is configured such that after swinging, it drives the heat collection lens 3, the fixed reflective base plate 4 and the reflective side plate 5 to swing along the trajectory of the sun.

[0051] The swing base 9 enables the support frame 1 to drive the heat-collecting lens 3, the fixed reflective base plate 4, and the reflective side plate 5 to swing in accordance with the sun's trajectory. The heat-collecting lens 3 can always face the sunlight, reducing light reflection loss and improving the efficiency of top light concentration. The fixed reflective base plate 4 and the reflective side plate 5 swing synchronously, ensuring that the reflected light is continuously focused on the bottom of the heat-collecting tube 2, avoiding reflection shift caused by changes in the sun's position, and further improving the overall thermal efficiency. The swing connection structure between the support frame 1 and the swing base 9 ensures the synchronicity and stability of the swing of each component. Combined with the fixing effect of the support frame 1 on each component, the positional relationship of each structure remains stable during the swing, improving the operational reliability of the equipment when tracking the sun's trajectory.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A top-concentrating trough solar collector, characterized in that, include: Support frame (1), on which heat collection tube (2) is provided; The heat collection lens (3) is mounted on the support frame (1) and located above the heat collection tube (2) to concentrate sunlight on the top of the heat collection tube (2) to heat the heat collection tube (2). The support frame (1) is provided with a fixed reflective base plate (4), which is located below the heat collection tube (2). The support frame (1) is also provided with two symmetrical reflective side plates (5). The fixed reflective base plate (4) and the reflective side plates (5) are used to reflect sunlight to the bottom of the heat collection tube (2) to heat the heat collection tube (2). The reflective side plates (5) are configured such that when they swing close to each other, they block the top of the fixed reflective base plate (4), and when they swing away from each other, they cancel the blocking of the fixed reflective base plate (4) to increase the total reflective area of ​​the two.

2. The top-concentrating trough solar collector according to claim 1, characterized in that, The support frame (1) includes a fixed base frame (110) and two symmetrically arranged lifting frames (120). Both lifting frames (120) are moved up and down on the fixed base frame (110). The two ends of the heat collection tube (2) and the heat collection lens (3) are respectively arranged on the two lifting frames (120). The fixed reflective base plate (4) and the reflective side plate (5) are both arranged on the fixed base frame (110).

3. The top-concentrating trough solar collector according to claim 2, characterized in that, The fixed base frame (110) has a central accommodating space (101), the fixed reflective base plate (4) is located in the accommodating space (101), the two reflective side plates (5) are configured to swing close to each other and enter the accommodating space (101), and the lifting frame (120) is configured to slide down and enter the accommodating space (101).

4. The top-concentrable trough solar collector according to claim 3, characterized in that, The reflective side plate (5) consists of two hinged split side plates (510), which are configured such that the angle between them decreases after swinging, so that the focal points of their reflections are close together.

5. The top-concentrable trough solar collector according to claim 4, characterized in that, The upper surface of the fixed reflective base plate (4) is provided with a first shaping protrusion (401) and a second shaping protrusion (402). The reflective side plate (5) is configured such that after it swings into the receiving space (101), the bottom of the two separate side plates (510) abuts against the first shaping protrusion (401) and the second shaping protrusion (402) respectively, so that the included angle between the two separate side plates (510) is reduced, thereby reducing the height of the focal point of their reflection.

6. The top-concentrable trough solar collector according to claim 4, characterized in that, The fixed reflective base plate (4) is arc-shaped. When the angle between the two split side plates (510) is at its maximum, the reflective side plate (5) formed is an arc-shaped plate with the same curvature as the fixed reflective base plate (4).

7. The top-concentrable trough solar collector according to claim 5, characterized in that, The bottom of each of the two split side plates (510) is provided with an abutment block (511), and the split side plate (510) abuts against the first shaping protrusion (401) and the second shaping protrusion (402) through the abutment block (511).

8. The top-concentrating trough solar collector according to claim 4, characterized in that, The two lifting frames (120) are equipped with synchronous connecting frames (6), and the fixed base frame (110) is equipped with a linear drive component. The linear drive component is used to drive the synchronous connecting frames (6) to move up and down in a synchronous manner so as to drive the two lifting frames (120) to move up and down synchronously.

9. The top-concentrable trough solar collector according to claim 8, characterized in that, A first connecting rod (7) is hinged to the fixed base frame (110), and the other end of the first connecting rod (7) is coaxially hinged to the two split side plates (510). The synchronous connecting frame (6) is hinged with a second connecting rod (8), and the other end of the second connecting rod (8) is hinged with the first connecting rod (7). The synchronous connecting frame (6) is configured such that after lifting and sliding, the reflective side plate (5) is driven to swing through the second connecting rod (8) and the first connecting rod (7).

10. The top-concentrable trough solar collector according to claim 1, characterized in that, Its characteristic is that it further includes: The swing base (9) and the support frame (1) are swing-mounted on the swing base (9). The support frame (1) is configured such that after swinging, it drives the heat collecting lens (3), the fixed reflective base plate (4) and the reflective side plate (5) to swing along the trajectory of the sun.

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