Glass-metal sealing process for vacuum heat collecting tube

A vacuum heat collector tube and metal sealing technology, applied in the field of glass-metal sealing, can solve the problems of inability to exhaust completely, glass is easily damaged, and preheating time is prolonged, etc., and achieves easy mass production, simple equipment and process. , the effect of shortening the sealing time

Inactive Publication Date: 2007-08-22
江希年 +2
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: the melting point of lead solder is low, and the vacuum exhaust temperature of the vacuum heat collecting tube is also reduced accordingly, so that it cannot be exhausted completely, so that the vacuum heat collecting tube will continuously deflate during use, which will affect its service life
However, when aluminum wire is used as sealing solder to manufacture vacuum heat collecting tubes, since the sealing temperature is 0.6-0.9 times the melting point of aluminum at 660°C, the state of aluminum wire is relatively hard, the glass is easily damaged during processing, and the yield is low, which is easy to cause slow Leakage, affecting product life
Moreover, the sealing temperature is high, the preheating time is prolonged, and the producti

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Glass-metal sealing process for vacuum heat collecting tube
  • Glass-metal sealing process for vacuum heat collecting tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035]As shown in Figure 1, it is a schematic diagram of the structure of a vacuum heat collecting tube in which a metal sealing part is sealed on a glass tube. The glass-metal sealing process of the vacuum heat collecting tube is a process of sealing between the glass tube 4 and the metal sealing part 3 . The glass-to-metal sealing process of the vacuum heat collecting tube of the present invention comprises the following steps:

[0036] (1) Carrying out pre-oxidation treatment to the sealing portion 31 of the metal sealing member 3 used for sealing;

[0037] (2) Pre-vitrification treatment is performed on the sealing portion 31 of the metal sealing member 3 after the pre-oxidation treatment;

[0038] (3) under heating conditions, the glass of the sealing part 41 of the glass tube 4 is sealed together with the sealing part 31 of the pre-vitrified metal sealing part 3, that is, the metal sealing part 3 and the glass tube are completed. 4 reliable sealing.

[0039] With the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The glass-metal sealing process for vacuum heat collecting tube includes the following steps: pre-oxidizing the part of the sealing metal workpiece, pre-vitrifying the part of the sealing metal workpiece, and sealing the glass and the pre-vitrified part of the sealing metal workpiece through heating. The glass-metal sealing process of the present invention has greatly lowered sealing temperature, greatly shortened sealing time, raised sealing quality, simplified sealing equipment and lowered production cost.

Description

technical field [0001] The invention relates to a glass-metal sealing technology, in particular to a glass-metal sealing technology for solar vacuum heat collecting tubes. Background technique [0002] Solar energy is an inexhaustible green energy source. In the utilization of solar energy, a kind of solar vacuum heat collecting tube is usually used to collect the heat of solar energy more effectively. The solar vacuum heat collecting tube includes a glass tube, and a metal heat absorbing body is arranged in the glass tube, and vacuum technology is used to make the inside of the glass tube in a vacuum state, so as to minimize the loss of heat energy. At least one end of the metal heat absorber protrudes from the outer end of the glass tube, and is connected to devices required for heat energy, such as water tanks, headers, etc. In order to maintain the vacuum state in the glass tube, the problem of sealing connection between the glass tube and the protruding end of the met...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C03C29/00C03C8/24
Inventor 江希年高汉三葛洪川
Owner 江希年
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap