Medium-temperature solar heat collecting tube with light condensing and self-emptying function

Abstract

The utility model relates to the technical field of solar heat collecting pipe, and disclose a medium temperature solar heat collecting pipe with internal light condensation and self emptying function, including glass outer tube, glass inner tube is fused and sealed in glass outer tube inside, the end of glass inner tube is connected with the inner wall of glass outer tube through the support card and is arranged, the outside of glass inner tube is provided with reflector, the inside of glass inner tube is provided with U type pipe, the U type pipe contact setting has finned tube, the inner wall of finned tube and glass inner tube contact setting. Glass outer tube and glass inner tube all adopt high borosilicate 3.3 glass to make. The tail end of glass outer tube adopts the neck-in structure. The medium temperature solar heat collecting pipe with internal light condensation and self emptying function can improve the thermal efficiency of the existing system, improve the system operation stability, reduce the later maintenance, and can realize medium temperature water supply and steam heat supply when applied to industrial heat.

Description

Technical Field

[0001] This utility model relates to the field of solar collector tube technology, specifically a medium-temperature solar collector tube with internal light-concentrating and self-venting function. Background Technology

[0002] Solar energy, as a clean and renewable energy source, occupies an increasingly important position in the global energy structure. As a core component of solar thermal utilization systems, the performance of medium-temperature solar collector tubes directly affects the heat collection efficiency and stability of the entire system.

[0003] Currently, traditional medium-temperature solar collector tubes have significant shortcomings in terms of light concentration. Most collector tubes use external concentrators, such as parabolic concentrators. While this method can concentrate sunlight to a certain extent, it is structurally complex, occupies a large area, and is difficult to install and debug, greatly increasing the system's construction cost and maintenance difficulty. At the same time, external concentrators are susceptible to environmental interference, such as strong winds and dust storms, leading to unstable concentrating effects and severely impacting heat collection efficiency.

[0004] Existing medium-temperature solar collector tubes also face many challenges in terms of venting. When the collector tube stops working or is in a low-temperature environment, the residual working medium (such as water or heat transfer oil) inside the tube is prone to freezing and expansion, which may cause the collector tube to crack and shorten its service life.

[0005] To address this issue, we propose a medium-temperature solar collector tube with a self-draining function that concentrates light. Utility Model Content

[0006] The purpose of this invention is to provide a medium-temperature solar collector tube with a self-draining function that concentrates light, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a medium-temperature solar collector tube with internal light-concentrating and self-venting function, comprising an outer glass tube, an inner glass tube fused inside the outer glass tube, the end of the inner glass tube being connected to the inner wall of the outer glass tube via a support clip, a reflector being provided on the outside of the inner glass tube, a U-shaped tube being provided inside the inner glass tube, a finned tube being provided in contact with the U-shaped tube, and the finned tube being in contact with the inner wall of the inner glass tube.

[0008] Preferably, both the outer and inner glass tubes are made of high borosilicate 3.3 glass, enabling applications in the medium-temperature field of solar thermal energy.

[0009] Preferably, the tail end of the glass outer tube adopts a necking structure, which reduces the space length occupied by the tail clip and increases the proportion of heat absorption area.

[0010] Preferably, the reflector is formed using a high-reflectivity panel, and the curved surface is formed using a combination curve, so that light is efficiently focused onto the heat-absorbing film layer.

[0011] Preferably, the two ends of the glass outer tube are respectively provided with an outer tube neck one and an outer tube neck two, and a getter is provided inside the glass outer tube.

[0012] Preferably, the U-shaped tube is made of metal tubing, which can significantly improve the system's pressure-bearing capacity.

[0013] Preferably, the finned tube is made of thin aluminum plate pressed and assembled, and after forming, it resembles the shape of a yin-yang symbol, which can conduct heat efficiently.

[0014] This invention provides a medium-temperature solar collector tube with an internal light-concentrating and self-venting function. This medium-temperature solar collector tube with an internal light-concentrating and self-venting function has the following beneficial effects:

[0015] This medium-temperature solar collector tube, with its self-draining function and focused light collection, can improve the thermal efficiency of existing systems, enhance system operational stability, reduce subsequent maintenance, and enable medium-temperature water and steam heating in industrial applications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a medium-temperature solar collector tube with a self-draining function for concentrating light, according to the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of the glass outer tube in a medium-temperature solar collector tube with a self-draining function for concentrating light, according to the present invention.

[0018] Figure 3 This is a schematic diagram of the end planar structure of the glass inner tube in a medium-temperature solar collector tube with a self-draining function for concentrating light, according to the present invention.

[0019] Figure 4 This is a schematic diagram of the finned tube structure in a medium-temperature solar collector tube with a self-draining function for concentrating light, according to this utility model.

[0020] In the diagram: 1. Inner glass tube; 2. Outer tube necking one; 3. Outer tube necking two; 4. Outer glass tube; 5. Reflector; 6. Finned tube; 7. U-tube; 8. Support clip; 9. Getter. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0022] A preferred embodiment of the medium-temperature solar collector tube with internal light-concentrating and self-venting function provided by this utility model is, for example... Figures 1 to 4As shown: A medium-temperature solar collector tube with internal light-concentrating and self-venting function includes a glass outer tube 4. The two ends of the glass outer tube 4 are respectively provided with an outer tube necking-down 1 2 and an outer tube necking-down 2 3. A getter 9 is placed inside the glass outer tube 4. An inner glass tube 1 is fused inside the glass outer tube 4. Both the glass outer tube 4 and the inner glass tube 1 are made of high borosilicate 3.3 glass, enabling application in the medium-temperature field of solar thermal energy. The end of the inner glass tube 1 is connected to the inner wall of the glass outer tube 4 via a support clip 8. The tail end of the glass outer tube 4 adopts a necking structure to reduce [gas pressure / air loss]. The length of the tail card increases the proportion of the heat absorption area. A reflector 5 is set on the outside of the glass inner tube 1. The reflector 5 is made of a high-reflectivity panel and the curved surface is formed by a combination of curves, so that the light can be efficiently concentrated on the heat absorption film layer. A U-shaped tube 7 is set inside the glass inner tube 1. The U-shaped tube 7 is made of metal tubing, which can greatly improve the system's pressure resistance. A finned tube 6 is set in contact with the U-shaped tube 7. The finned tube 6 is in contact with the inner wall of the glass inner tube 1. The finned tube 6 is made of thin aluminum plate and is shaped like a yin-yang symbol after forming, which can conduct heat efficiently.

[0023] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model. Furthermore, it should be noted that the components of this utility model are not limited to the overall application described above. Each technical feature described in the specification of this utility model can be used individually or in combination as needed. Therefore, this utility model naturally covers other combinations and specific applications related to the points of this utility model.

Claims

1. A medium-temperature solar collector tube with a self-draining function for concentrating light, characterized in that: The device includes an outer glass tube (4), inside which a glass inner tube (1) is fused. The end of the glass inner tube (1) is connected to the inner wall of the outer glass tube (4) via a support clip (8). A reflector (5) is provided on the outside of the glass inner tube (1). A U-shaped tube (7) is provided inside the glass inner tube (1). A finned tube (6) is provided in contact with the U-shaped tube (7). The finned tube (6) is in contact with the inner wall of the glass inner tube (1). Through structural innovation, this heat collection tube realizes the application of solar thermal medium temperature field.

2. A medium-temperature solar collector tube with internal light-concentrating and self-venting function according to claim 1, characterized in that: Both the outer glass tube (4) and the inner glass tube (1) are made of high borosilicate 3.3 glass.

3. A medium-temperature solar collector tube with internal light-concentrating and self-venting function according to claim 1, characterized in that: The glass outer tube (4) has a necked structure at its tail end.

4. A medium-temperature solar collector tube with internal light-concentrating and self-venting function according to claim 1, characterized in that: The reflector (5) is formed using a high-reflectivity panel, and the curved surface is formed using a combination curve.

5. A medium-temperature solar collector tube with a self-draining function for concentrating light as described in claim 1, characterized in that: The two ends of the glass outer tube (4) are respectively provided with an outer tube neck one (2) and an outer tube neck two (3), and a getter (9) is provided inside the glass outer tube (4).

6. A medium-temperature solar collector tube with internal light-concentrating and self-venting function according to claim 1, characterized in that: The U-shaped tube (7) is made of metal tubing.

7. A medium-temperature solar collector tube with a self-draining function for concentrating light as described in claim 1, characterized in that: The finned tube (6) is made of thin aluminum plate pressed and assembled, and after forming, it resembles the shape of a tai ji diagram.

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