Heating burner for producing an integral bond between components of quartz glass

Patent metadata

Field	Value
Publication number	US-11535547-B2
Application number	US-202117176294-A
Country	US
Kind code	B2
Filing date	Feb 16, 2021
Priority date	Jun 30, 2017
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

Known heating burners for producing a welded joint between components of quartz glass include a burner head in which at least one burner nozzle is formed, a burner-head cooling system for the temperature control of the burner head and a supply line connected to the burner nozzle for a fuel gas. Starting from this, to modify a heating burner in such a way that impurities in the weld seam between quartz-glass components to be connected are largely avoided, it is suggested that the burner head should include a base body of silver or of a silver-based alloy.

First claim

What is claimed is:

1. A heating burner for producing a welded joint between components of quartz glass, comprising:
a burner head in which at least one burner nozzle is formed;
said burner head comprises a base body of silver or of a silver-based alloy;
a burner-head cooling system for the temperature control of the burner head;
wherein in said burner-head cooling system two cooling water pipes for a cooling water supply and cooling water discharge are connected to each other via a fluidically continuous cooling channel; and
a supply line connected to the burner nozzle for a fuel gas or a fuel gas mixture;
wherein in said base body at least one burner nozzle is designed as a tubular insertion part of silver or of a silver-based alloy, that is inserted into a through hole in the base body.

2. The heating burner of claim 1 , wherein the silver content of the base body of the burner head is at least 90% by wt.

3. The heating burner of claim 1 , wherein the silver content of the base body of the burner head is at least 99% by wt.

4. The heating burner of claim 1 , wherein a burner mouth which faces the connection surfaces is polished.

5. The heating burner of claim 1 , wherein the connection between burner nozzle and gas supply line is configured as a detachable positive connection.

6. A heating burner for producing a welded joint between components of quartz glass, comprising:
a burner head in which at least one burner nozzle if formed;
the burner head comprising a base body of silver or of a silver-based alloy;
a burner-head cooling system for the temperature control of the burner head;
wherein in said burner-head cooling system two cooling water pipes for a cooling water supply and cooling water discharge are connected to each other via a fluidically continuous cooling channel; and
a supply line connected to the burner nozzle for a fuel gas or a fuel gas mixture;
wherein in said base body the at least one burner nozzle is designed as a bore in the base body of the burner head.

7. The heating burner of claim 6 , wherein the silver content of the base body of the burner head is at least 90% by wt.

8. The heating burner of claim 6 , wherein the silver content of the base body of the burner head is at least 99% by wt.

9. The heating burner of claim 6 , wherein a burner mouth which faces the connection surfaces is polished.

10. The heating burner of claim 6 , wherein the connection between burner nozzle and gas supply line is configured as a detachable positive connection.

Assignees

• Heraeus Quarzglas

Inventors

• Ganz Oliver

Classifications

• C03B37/01257

  Heating devices therefor · CPC title

• F23D14/48

  Nozzles · CPC title

• C03B2201/02

  Pure silica glass, e.g. pure fused quartz · CPC title

• C03C27/08

  with the aid of intervening metal · CPC title

• C03B37/01205

  starting from tubes, rods, fibres or filaments (C03B37/014 takes precedence) · CPC title