Glass-melting electrode with cooling device and cooling device for a glass-melting electrode

Patent metadata

Field	Value
Publication number	US-9686822-B2
Application number	US-201314437515-A
Country	US
Kind code	B2
Filing date	Oct 18, 2013
Priority date	Oct 22, 2012
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A glass-melting electrode has a cooling device. The glass-melting electrode has an electrode body with a blind hole, and the cooling device has a cooling tube which can be inserted into the blind hole in order to feed coolant into the blind hole. The cooling device has a flow distributor with at least three outlet openings. The flow distributor is arranged at an end of the cooling tube which has been inserted into the blind hole, such that coolant flows through the flow distributor into the blind hole.

First claim

The invention claimed is:

1. An electrode assembly, comprising:
a glass-melting electrode with an electrode body having a blind hole formed therein, said blind hole having a blind hole wall;
a cooling device with a cooling tube having an end configured for insertion into said blind hole and for feeding coolant into said blind hole;
said cooling device having a flow distributor with at least three outlet openings disposed at said end of said cooling tube inserted in said blind hole, with coolant flowing through said flow distributor into the blind hole;
wherein at least a part of said flow distributor is connected in a heat-conducting connection to said electrode body; and
wherein at least part of an outer surface of said flow distributor is soldered to said blind hole wall.

2. The electrode assembly according to claim 1 , wherein said blind hole is formed with side walls and said outlet openings are formed to conduct a coolant stream parallel to or substantially parallel to said side walls of said blind hole.

3. The electrode assembly according to claim 1 , wherein a spacing distance between said flow distributor and said blind hole walls increases with an increasing distance from the electrode axis.

4. The electrode assembly according to claim 1 , wherein, with said cooling tube inserted into said blind hole, said flow distributor bears against an open end of said cooling tube.

5. The electrode assembly according to claim 1 , wherein said flow distributor has a closed tip region and a diameter of said closed tip region amounts to at least 15%, 25%, 30%, 40% or 50% of an external diameter of said flow distributor.

6. The electrode assembly according to claim 1 , wherein a sum total of the cross sections of all of said outlet openings is equal to or substantially equal to a feed-in cross section of said cooling tube.

7. The electrode assembly according to claim 1 , wherein at least some of said outlet openings extend as far as a tip of said flow distributor which bears against a base of said blind hole.

8. The electrode assembly according to claim 1 , wherein said blind hole has a blind hole base with a semicircular or substantially semicircular form.

9. The electrode assembly according to claim 8 , wherein said flow distributor has a semicircular or substantially semicircular form.

10. The electrode assembly according to claim 1 , wherein a discharge gap for discharging coolant from said blind hole is formed between said cooling tube and said blind hole and a sum total of the cross sections of all of said outlet openings is equal to or substantially equal to a cross section of said discharge gap.

11. The electrode assembly according to claim 1 , wherein said flow distributor includes spacers configured to center said flow distributor in said blind hole.

12. The electrode assembly according to claim 1 , wherein said cooling tube includes spacers configured to center said cooling tube in said blind hole.

13. The electrode assembly according to claim 1 , wherein said cooling tube and said flow distributor overlap at least partially in an axial direction.

14. The electrode assembly according to claim 1 , wherein said flow distributor is formed with a reception opening and said cooling tube is formed with a reception opening, and wherein said reception opening of said flow distributor or said reception opening of said cooling tube tapers obliquely in an insertion direction.

15. The electrode assembly according to claim 1 , wherein said blind hole is formed in a region of said electrode body to be arranged above a glass melt during use of said glass-melting electrode.

16. The electrode assembly according to claim 1 , wherein said electrode body comprises an electrode head formed in one piece with an electrode shaft.

17. A cooling device for cooling a glass-melting electrode, said cooling device comprising:
a cooling tube for feeding coolant into a blind hole formed in an electrode body of the glass-melting electrode, said cooling tube having an end to be inserted into the blind hole; and
a flow distributor formed with at least three outlet openings, said flow distributor being disposed at said end of said cooling tube to be inserted into the blind hole;
wherein at least a part of said flow distributor is to be connected in a heat-conducting connection to the electrode body of the glass-melting electrode; and
wherein at least part of an outer surface of said flow distributor is soldered to a wall of said blind hole.

18. The cooling device according to claim 17 , wherein said flow distributor comprises spacers for centering said flow distributor in the blind hole.

19. The cooling device according to claim 17 , wherein said flow distributor has a semicircular or substantially semicircular shape.

20. The cooling device according to claim 17 , wherein said flow distributor has a closed tip region and a diameter of said closed tip region amounts to at least 15%, 25%, 30%, 40% or 50% of an external diameter of said flow distributor.

21. The cooling device according to claim 17 , wherein at least a part of said outlet openings extends as far as a region of said flow distributor that can be fastened on a blind hole base.

22. The cooling device according to claim 17 , wherein a sum total of the cross sections of all of said outlet openings is equal to, or substantially equal to, a feed-in cross section of said cooling tube.

23. An electrode assembly, comprising:
a glass-melting electrode with an electrode body having a blind hole formed therein;
a cooling device with a cooling tube having an end configured for insertion into said blind hole and for feeding coolant into said blind hole;
said cooling device having a flow distributor with at least three outlet openings disposed at said end of said cooling tube inserted in said blind hole, with coolant flowing through said flow distributor into said blind hole; and
wherein at least a part of said flow distributor is connected in a heat-conducting connection to said electrode body;
wherein said blind hole has side walls and said outlet openings are formed to conduct a coolant stream parallel to or substantially parallel to said side walls of said blind hole; and
wherein at least part of an outer surface of said flow distributor is soldered to a wall of said blind hole.

Assignees

• Plansee Se

Inventors

• Perktold Helmut
• Sprenger Dietmar
• Traxler Hannes

Classifications

• H05B3/03 Primary

  Electrodes · CPC title

• H05B3/0004

  Devices wherein the heating current flows through the material to be heated (Circuit arrangements for heating by passing the current directly across the material to be heated H05B3/0023; granular, powdered or fluid material H05B3/60) · CPC title

• H05B7/12

  Arrangements for cooling, sealing or protecting electrodes · CPC title

• C03B5/027

  by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating · CPC title

• H05B2203/025

  Heaters specially adapted for glass melting or glass treatment · CPC title