Involute curved surface all-pass all-glass evacuated collector tube
By adopting an involute curved surface model design in the vacuum heat collector, the problem of the existing vacuum heat collector cannot open both ends and the expansion and damage of the inner glass tube is solved, and higher system flexibility, tolerance and stability are achieved.
Patent Information
- Application Number
- CN202421955754.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The existing vacuum heat collector pipe cannot open at both ends, resulting in a convenient engineering design of incoming and outgoing one end and water outlet at the other end is difficult to achieve, and the inner glass pipe is easily damaged due to excessive expansion.
A full-through full-glass vacuum heat collector is designed. The inner and outer glass tubes adopt a round involute curved surface model, with the inner tube concave and the outer tube convex, which increases the expansion and expansion design to ensure that the vacuum tube does not break at high temperatures.
The two-end opening design of the vacuum heat collector pipe is realized, which improves the flexibility and cost-effectiveness of the system, and enhances the expansion and expansion resistance and high temperature stability of the vacuum pipe.
Smart Images
Figure CN222911991U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum heat collecting tubes, in particular to an involute surface all-through all-glass vacuum heat collecting tube. Background Art
[0002] An ordinary all-glass vacuum solar heat collecting tube has a Dewar bottle structure with one end open and the other end closed, similar to the inner liner of a thermos flask. The water inlet and outlet are both at the open end, which has certain limitations on engineering design and the actual application of the product system. Conventional vacuum tubes cannot have both ends open and cannot complete a convenient engineering design of water inlet at one end and water outlet at the other end.
[0003] The reason why conventional vacuum tubes cannot have both ends open is that the cover glass tube (outer glass tube) and the inner glass tube are sealed at both ends, with a vacuum in the middle. The inner tube is coated with a selective absorption coating to absorb light energy and convert it into heat energy. At this time, due to reasons such as vacuum insulation, the temperature of the inner glass tube is higher than that of the outer glass tube. The inner glass tube expands, while the outer glass tube remains its original length. Due to the brittleness and rigidity of the glass, the linear expansion amount of the inner glass tube cannot be released under the restriction of the outer glass tube, resulting in excessive stress and breakage. Therefore, for the improvement of existing vacuum heat collecting tubes, it is particularly important to design a new type of involute surface all-through all-glass vacuum heat collecting tube to solve the above technical defects and improve the practicability of the overall vacuum heat collecting tube. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an involute surface all-through all-glass vacuum heat collecting tube. In order to reduce the linear expansion generated during the expansion release of the inner glass tube and the compression damage to the inner glass tube, a circular involute model is specifically adopted for the transition surface (similar to gear meshing. The inner glass tube is under pressure, and the involute surface model can ensure that when under pressure, the normal direction of the force is always tangent to the base circle of the surface, making the surface less likely to break the inner glass tube, the proximal transition surface of the inner glass tube involute and the distal transition surface of the inner glass tube involute). The inner tube is concave and the outer tube is convex. The convex surface of the outer tube is also a circular involute surface. The outer tube is under tension, and the convex surface has a certain expansion amount. Both the inner tube and the outer tube have compression and expansion telescopic amounts, ensuring that the vacuum tube can be intact at higher temperatures, so as to solve the problems raised in the above background art.
[0005] To achieve the above purpose, the utility model provides the following technical solutions:
[0006] An involute surface all-through all-glass vacuum heat collecting tube, comprising an outer glass tube, an inner glass tube is arranged inside the outer glass tube, a plurality of inner glass tube curved surface joints are arranged outside the inner glass tube and inside the outer glass tube, an inner glass tube sunken curved surface joint is arranged outside the inner glass tube curved surface joint, inner glass tube involute transition curved surfaces are respectively arranged at both ends of the inner glass tube sunken curved surface joint and outside the inner glass tube, and a plurality of outer glass tube convex curved surface joints are arranged outside the outer glass tube.
[0007] As a preferred solution of the present utility model, the inner glass tube involute transition curved surface is composed of an inner glass tube involute proximal transition curved surface and an inner glass tube involute distal transition curved surface. The inner glass tube involute proximal transition curved surface is arranged outside the inner glass tube sunken curved surface joint, and the inner glass tube involute distal transition curved surface is arranged outside the inner glass tube involute transition curved surface and outside the inner glass tube sunken curved surface joint.
[0008] As a preferred solution of the present utility model, two outer glass tube involute proximal transition curved surfaces are arranged outside the outer glass tube convex curved surface joint, and an outer glass tube involute distal transition curved surface is arranged outside the outer glass tube involute proximal transition curved surface and outside the outer glass tube convex curved surface joint.
[0009] As a preferred solution of the present utility model, a selective absorption film layer is covered outside the inner glass tube, and a vacuum interlayer is arranged between the outer glass tube and the inner glass tube.
[0010] As a preferred solution of the present utility model, support frames are respectively arranged at both ends of the inner glass tube and inside the outer glass tube, and one end of the support frame far from the inner glass tube is connected to the outer glass tube.
[0011] As a preferred solution of the present utility model, a sealed tail tip is arranged at one end of the outer glass tube and far from the outer glass tube convex curved surface joint.
[0012] As a preferred solution of the present utility model, the number of the inner glass tube curved surface joints and the inner glass tube sunken curved surface joints is the same as that of the outer glass tube convex curved surface joints.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] 1. In the present utility model, in the through state, it is more suitable for engineering design and construction, can form a large series-connected modular system, the product configuration and design are more flexible, and the system cost is reduced.
[0015] 2. In the present utility model, the inner tube is concave and the outer tube is convex, and the expansion and contraction designs are added to both the inner and outer glass tubes, which can increase the expansion and contraction tolerance of the vacuum tube.
[0016] 3. In the present utility model, the involute surface design enables the product to be more resistant to stress and deformation, making the vacuum tube less likely to break and capable of withstanding higher temperatures. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;
[0018] Figure 2 is a schematic diagram of the structures of the outer glass tube and the inner glass tube of the present utility model;
[0019] Figure 3 For the present utility model Figure 2 is a schematic diagram of the enlarged structure of A therein.
[0020] In the figures: 1. Outer glass tube; 2. Inner glass tube; 3. Inner glass tube curved surface node; 4. Inner glass tube sunken curved surface node; 5. Inner glass tube involute transition curved surface; 6. Outer glass tube convex curved surface node; 7. Inner glass tube involute proximal transition curved surface; 8. Inner glass tube involute distal transition curved surface; 9. Selective absorption film layer; 10. Vacuum interlayer; 11. Support frame; 12. Sealed-off tail tip; 13. Outer glass tube involute proximal transition curved surface; 14. Outer glass tube involute distal transition curved surface. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment
[0022] Please refer to Figures 1-3 , the present utility model provides a technical solution:
[0023] An involute surface all-through all-glass vacuum heat collecting tube, comprising an outer glass tube 1, an inner glass tube 2 is disposed inside the outer glass tube 1, a plurality of groups of inner glass tube curved surface nodes 3 are disposed outside the inner glass tube 2 and inside the outer glass tube 1, an inner glass tube sunken curved surface node 4 is disposed outside the inner glass tube curved surface node 3, inner glass tube involute transition curved surfaces 5 are respectively disposed at both ends of the inner glass tube sunken curved surface node 4 and outside the inner glass tube 2, and a plurality of groups of outer glass tube convex curved surface nodes 6 are disposed outside the outer glass tube 1.
[0024] Furthermore, the involute transition surface 5 of the inner glass tube is composed of the proximal involute transition surface 7 of the inner glass tube and the distal involute transition surface 8 of the inner glass tube. The proximal involute transition surface 7 of the inner glass tube is provided on the outer side of the recessed surface section 4 of the inner glass tube. The distal involute transition surface 8 of the inner glass tube is provided on the outer side of the involute transition surface 5 of the inner glass tube and is located on the outer side of the recessed surface section 4 of the inner glass tube. Two sets of proximal involute transition surfaces 13 of the outer glass tube are provided on the outer side of the convex surface section 6 of the outer glass tube. The distal involute transition surface 14 of the outer glass tube is provided on the outer side of the proximal involute transition surface 13 of the outer glass tube and is located on the outer side of the convex surface section 6 of the outer glass tube. The number of the curved surface sections 3 of the inner glass tube, the recessed surface sections 4 of the inner glass tube is the same as that of the convex surface section 6 of the outer glass tube. The inner tube is concave and the outer tube is convex. The expansion and contraction designs are added to both the inner and outer glass tubes, which can increase the expansion and contraction tolerance of the vacuum tube. The involute surface design makes the product more resistant to stress and deformation, and the vacuum tube is less likely to be damaged and can withstand higher temperatures.
[0025] Secondly, a selective absorption film layer 9 is covered on the outer side of the inner glass tube 2. A vacuum interlayer 10 is provided between the outer glass tube 1 and the inner glass tube 2. The outer wall of the inner glass tube 2 has a selective absorption coating, which converts solar energy into heat energy. The inner glass tube 2 and the outer glass tube 1 form a framework, and the middle is a vacuum interlayer 10, which reduces convection and plays a heat preservation role.
[0026] Furthermore, support frames 11 are provided at both ends of the inner glass tube 2 and are located inside the outer glass tube 1. One end of the support frame 11 away from the inner glass tube 2 is connected to the outer glass tube 1. The support frames 11 at both ends support and fix the inner and outer tubes during the manufacturing process of the vacuum tube.
[0027] Even further, a sealed tail tip 12 is provided on the outer side of the outer glass tube 1 and at the end away from the convex surface section 6 of the outer glass tube. The sealed tail tip 12 is used for plugging after vacuum pumping.
[0028] In this embodiment, the implementation scenario is specifically as follows: During actual use, the support frame 11 is connected to the outer glass tube 1 so that the inner glass tube 2 can be connected to the outer glass tube 1. The inner glass tube 2 and the outer glass tube 1 form a framework, and the middle is a vacuum interlayer 10, which reduces convection and plays a heat preservation role. The outer wall of the inner glass tube 2 has a selective absorption coating, which converts solar energy into heat energy. The all-through vacuum tube allows media such as water and air to enter at one end. After the inner tube is heated, the media flows out at the other end, and a large-area through-connection engineering system can be completed. The inner tube is concave and the outer tube is convex. The expansion and contraction designs are added to both the inner and outer glass tubes, which can increase the expansion and contraction tolerance of the vacuum tube. Compared with the existing vacuum heat collecting tube, the overall practicality of the vacuum heat collecting tube can be improved through the design of the present utility model.
[0029] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. An involute curved full-through all-glass vacuum heat collecting tube, comprising an outer glass tube (1), characterized in that: An inner glass tube (2) is provided inside the outer glass tube (1); a plurality of groups of inner glass tube curved surface sections (3) are provided on the outer side of the inner glass tube (2) and located inside the outer glass tube (1); an inner glass tube sunken curved surface section (4) is provided on the outer side of the inner glass tube curved surface section (3); inner glass tube involute transition curved surfaces (5) are provided at both ends of the inner glass tube sunken curved surface section (4) and located on the outer side of the inner glass tube (2); and a plurality of groups of outer glass tube convex curved surface sections (6) are provided on the outer side of the outer glass tube (1).
2. The involute curved full-through all-glass vacuum heat collecting tube according to claim 1, characterized in that: The inner glass tube involute transition surface (5) is composed of an inner glass tube involute proximal transition surface (7) and an inner glass tube involute distal transition surface (8); the inner glass tube involute proximal transition surface (7) is opened on the outside of the inner glass tube sunken curved surface section (4); and the inner glass tube involute distal transition surface (8) is opened on the outside of the inner glass tube involute transition surface (5) and is located on the outside of the inner glass tube sunken curved surface section (4).
3. The involute curved full-through all-glass vacuum heat collecting tube according to claim 1, characterized in that: Two groups of outer glass tube involute proximal transition curved surfaces (13) are provided on the outside of the outer glass tube outer convex curved surface section (6), and an outer glass tube involute distal transition curved surface (14) is provided on the outside of the outer glass tube involute proximal transition curved surface (13) and located on the outside of the outer glass tube outer convex curved surface section (6).
4. The involute curved full-through all-glass vacuum heat collecting tube according to claim 1, characterized in that: The outer side of the inner glass tube (2) is covered with a selective absorption film layer (9), and a vacuum interlayer (10) is provided between the outer glass tube (1) and the inner glass tube (2).
5. The involute curved full-through all-glass vacuum heat collecting tube according to claim 1, characterized in that: Support frames (11) are provided at both ends of the inner glass tube (2) and are located inside the outer glass tube (1); one end of the support frame (11) away from the inner glass tube (2) is connected to the outer glass tube (1).
6. The involute curved full-through all-glass vacuum heat collecting tube according to claim 1, characterized in that: A sealing tail tip (12) is provided on the outer side of the outer glass tube (1) and at one end away from the outer convex curved surface section (6) of the outer glass tube.
7. The involute curved full-through all-glass vacuum heat collecting tube according to claim 1, characterized in that: The number of the inner glass tube curved surface sections (3) and the inner glass tube sunken curved surface sections (4) is consistent with the number of the outer glass tube convex curved surface sections (6).