Vacuum tube tail directional explosion venting structure

Abstract

The utility model relates to the technical field of solar heat utilization, especially a vacuum tube tail directional explosion venting structure, when using, the cover glass tube subassembly sets up the inside glass tube outside, when the overpressure phenomenon appears in the inside glass tube, realizes directional explosion venting through the wire slot, and the cover glass subassembly avoids the irregular diffusion of glass fragments, prevents the harm caused by the adjacent heat collecting tube and the surrounding environment and personnel, improves the safety performance, including the inside glass tube and solar selective absorption coating, the inside glass tube is the condensation section, the inside glass tube outside wall is provided with solar selective absorption coating, still includes the cover glass tube subassembly, the inside glass tube outside is provided with cover glass tube subassembly, the end of inside glass tube is in the inside of cover glass tube subassembly, the end of inside glass tube is provided with wire slot.

Description

Technical Field

[0001] This utility model relates to the technical field of solar thermal utilization, and in particular to a directional explosion relief structure at the tail of a vacuum tube. Background Technology

[0002] All-glass heat pipe vacuum solar collectors are core components of solar water heating and solar heating systems. With their advantages such as high heat exchange efficiency, strong antifreeze performance, and single-pipe maintenance without affecting the overall system, they are widely used in various hot water supply scenarios.

[0003] However, glass products are brittle and fragile, posing certain safety hazards during use. For example, in extreme operating conditions of the engineering system, such as when the system is exposed to direct sunlight or the working fluid cannot circulate properly, the collector tubes may not effectively change phases and may burst under prolonged critical pressure. This could cause fragments to spread irregularly, potentially harming adjacent collector tubes, the surrounding environment, and personnel.

[0004] Therefore, this design allows for the avoidance of the risk of a single vacuum collector tube bursting due to directional, localized self-explosion and pressure relief when the aforementioned extreme conditions occur. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a directional explosion relief structure at the tail of a vacuum tube to improve safety.

[0006] This utility model discloses a directional explosion relief structure for the tail end of a vacuum tube, comprising an inner glass tube and a solar selective absorption coating. The interior of the inner glass tube is a condensation section, and the outer wall of the inner glass tube is coated with the solar selective absorption coating. It also includes a cover glass tube assembly, which is positioned outside the inner glass tube. The end of the inner glass tube is located inside the cover glass tube assembly, and a groove is provided at the end of the inner glass tube. In use, the cover glass tube assembly is positioned outside the inner glass tube. When an overpressure occurs inside the inner glass tube, directional explosion relief is achieved through the groove. Simultaneously, the cover glass assembly prevents the irregular spread of glass fragments, eliminating potential hazards to adjacent collector tubes, the surrounding environment, and personnel, thus improving safety performance.

[0007] Preferably, the glass tube assembly includes a glass tube, a support, a getter, and a getter mirror. The glass tube is fitted over the outer side of the inner glass tube, and a vacuum interlayer is formed between the outer wall of the inner glass tube and the inner side of the glass tube. A support is provided between the glass tube and the inner glass tube. A heat pipe working fluid is provided on the inner wall of the inner glass tube. A getter and a getter mirror are provided between the glass tube and the inner glass tube. The support improves the connection between the glass tube and the inner glass tube. The getter and the getter mirror perform vacuum adsorption on the vacuum interlayer between the glass tube and the inner glass tube without affecting the original performance of the heat collection tube. This function is achieved through a special local structure without damaging the heat absorption film layer and the vacuum interlayer, and without affecting the heat collection performance and heat loss performance.

[0008] Preferably, the end of the inner glass tube is a flat-bottomed end.

[0009] Preferably, the end of the inner glass tube is a round-bottomed end.

[0010] Preferably, the groove is a radial groove extending outward from the radial center point.

[0011] Preferably, the groove is n annular grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When in use, the glass tube assembly is set on the outside of the inner glass tube. When an overpressure occurs inside the inner glass tube, directional explosion relief is achieved through the wire groove. At the same time, the glass tube assembly prevents the irregular spread of glass fragments, eliminates the risk of harm to adjacent heat collection tubes, the surrounding environment, and personnel, and improves safety performance. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention, in which the end of the inner glass tube is a round bottom end of the inner tube. Figure 2 This is a cross-sectional structural diagram of the present invention, in which the end of the inner glass tube is a flat-bottomed end. Figure 3 It is along Figure 1 A cross-sectional view of line A-A in the middle.

[0014] The following labels in the attached diagram are: 1. Condensation section; 2. Inner glass tube; 3. Solar selective absorption coating; 4. Vacuum interlayer; 5. Cover glass tube; 6. Support component; 7. Heat pipe working fluid; 8. Getter; 9. Getter mirror; D. Outer diameter of cover glass tube; d. Outer diameter of inner glass tube; L1. Length of vacuum collector tube; L2. Length of condensation section. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0016] like Figures 1 to 3 As shown, a directional explosion relief structure for the tail of a vacuum tube according to this utility model includes an inner glass tube 2 and a solar selective absorption coating 3. The inner glass tube 2 has a condensation section 1 inside and a solar selective absorption coating 3 on the outer wall of the inner glass tube 2. It also includes a cover glass tube assembly, which is provided on the outer side of the inner glass tube 2. The end of the inner glass tube 2 is inside the cover glass tube assembly, and a wire groove is provided at the end of the inner glass tube 2. like Figure 2 As shown, the glass tube assembly includes a glass tube 5, a support 6, a getter 8, and a getter mirror 9. The glass tube 5 is fitted onto the outside of the inner glass tube 2. A vacuum interlayer 4 is formed between the outer wall of the inner glass tube 2 and the inner side of the glass tube 5. The support 6 is provided between the glass tube 5 and the inner glass tube 2. A heat pipe working fluid 7 is provided on the inner wall of the inner glass tube 2. The getter 8 and the getter mirror 9 are provided between the glass tube 5 and the inner glass tube 2. The inner glass tube has two flat-bottomed ends (e.g., ...). Figure 1 As shown in the figure or the round end of the inner tube (such as...) Figure 2 As shown in the figure; The groove is a groove arranged radially outward from a radial center point, n annular grooves, or a combination of both (e.g., Figure 3 As shown in the figure.

[0017] In this embodiment, during use, the cover glass tube assembly is placed outside the inner glass tube 2. When an overpressure occurs inside the inner glass tube 2, directional explosion relief is achieved through the wire groove. At the same time, the cover glass assembly prevents the irregular spread of glass fragments, eliminating the risk of harm to adjacent heat collection tubes, the surrounding environment, and personnel. The support member 6 improves the connection between the cover glass tube 5 and the inner glass tube 2. The getter 8 and the getter mirror 9 perform vacuum adsorption on the vacuum interlayer 4 between the cover glass tube 5 and the inner glass tube 2 without affecting the original performance of the heat collection tube. This function is achieved through a special local structure without damaging the heat absorption film layer and the vacuum interlayer, and without affecting the heat collection performance and heat loss performance.

[0018] The main functions achieved by this utility model are: 1. To completely solve the safety hazards caused by tube bursts. By setting a directional explosion relief structure, the heat collection tube can achieve directional explosion relief when overpressured, avoiding the irregular spread of glass fragments, preventing harm to adjacent heat collection tubes, the surrounding environment and personnel, and greatly improving safety performance.

[0019] 2. It does not affect the original performance of the heat collection tube. The function is achieved through a special local structure. It does not damage the heat absorption film layer and vacuum interlayer, and does not affect the heat collection performance or heat loss performance.

[0020] 3. The structure is simple, does not significantly increase manufacturing costs, and is conducive to mass production.

[0021] 4. It has strong compatibility and is suitable for various existing vacuum solar collector tubes (such as Φ47, Φ58, Φ70, etc.). It can be directly upgraded and modified in existing production lines without large-scale equipment investment.

[0022] This utility model discloses a directional explosion relief structure for the tail of a vacuum tube, wherein the inner glass tube 2 and the outer glass tube 5 constitute a vacuum heat collection tube; the getter 8 and the getter mirror 9 of this utility model are commercially available, and technicians in this industry only need to follow the accompanying instruction manual for installation and operation, without requiring any creative work from those skilled in the art.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A directional explosion relief structure for the tail of a vacuum tube, comprising an inner glass tube (2) and a solar selective absorption coating (3), wherein the interior of the inner glass tube (2) is a condensation section (1), and the outer wall of the inner glass tube (2) is provided with the solar selective absorption coating (3), characterized in that, It also includes a glass tube assembly, on the outside of the inner glass tube (2), the end of the inner glass tube (2) is inside the glass tube assembly, and the end of the inner glass tube (2) is provided with a wire groove.

2. The directional explosion relief structure at the tail of a vacuum tube as described in claim 1, characterized in that, The glass tube assembly includes a glass tube (5), a support (6), a getter (8), and a getter mirror (9). The glass tube (5) is fitted on the outside of the inner glass tube (2). A vacuum interlayer (4) is formed between the outer wall of the inner glass tube (2) and the inner side of the glass tube (5). The support (6) is provided between the glass tube (5) and the inner glass tube (2). The heat pipe working fluid (7) is provided on the inner wall of the inner glass tube (2). The getter (8) and the getter mirror (9) are provided between the glass tube (5) and the inner glass tube (2).

3. The directional explosion relief structure at the tail of a vacuum tube as described in claim 1, characterized in that, The end of the inner glass tube (2) is a flat-bottomed end.

4. The directional explosion relief structure at the tail of a vacuum tube as described in claim 1, characterized in that, The end of the inner glass tube (2) is the round bottom end of the inner tube.

5. The directional explosion relief structure at the tail of a vacuum tube as described in claim 1, characterized in that, The groove is a radial groove that radiates outward from the radial center point.

6. The directional explosion relief structure at the tail of a vacuum tube as described in claim 1, characterized in that, The groove is n annular grooves.

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