Method for cooling a space around a sleeve shaft, device for guiding a fluid along an outer surface area of a sleeve shaft, sleeve shaft comprising such a device, refractory tube with such a sleeve shaft inserted and system comprising such a sleeve shaft and/or such a refractory tube

Patent metadata

Field	Value
Publication number	US-12049422-B2
Application number	US-202117360675-A
Country	US
Kind code	B2
Filing date	Jun 28, 2021
Priority date	Jun 29, 2020
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

The present invention relates to a method for cooling a space around a sleeve shaft, a device for guiding a fluid along an outer surface area of a sleeve shaft, a sleeve shaft including such a device, and a refractory tube with such a sleeve shaft inserted. The present invention also relates to a system including such a device, which system may also include such a sleeve shaft and such a refractory tube.

First claim

What is claimed is:

1. A system, comprising:
a refractory tube;
a sleeve shaft which is used as a carrier for the refractory tube, wherein during a glass tube drawing process molten glass runs onto a surface area of the refractory tube, the sleeve shaft comprising an outer surface area; and
a device for guiding a fluid along an outer surface area of the sleeve shaft which is used as the carrier for the refractory tube, wherein the device is arranged at least area by area at least one of on the sleeve shaft or in the refractory tube in a non-rotating manner, the device comprising:
an outer wall, which, when the device is mounted on the sleeve shaft, has at least area by area a radial distance from the outer surface area of the sleeve shaft and limits a volume domain enclosed between the outer wall and the outer surface area of the sleeve shaft at least in part radially outwards, the outer wall having a first axial end and a second axial end opposite the first axial end; and
a dividing element arranged at least in part within the volume domain, which divides the volume domain into a plurality of volume part domains, which volume part domains are at least in part at least one of pairwise or area by area fluidly connected to each other within the volume domain, wherein the outer wall has area by area a radial distance from the outer surface area of the sleeve shaft and limits the volume domain enclosed between the outer wall and the outer surface area of the sleeve shaft at least in part radially outward, wherein the dividing element extends from the first axial end to an overflow area adjacent to the second axial end.

2. The system of claim 1 , wherein the outer wall is designed in one piece.

3. The system of claim 1 , wherein the outer wall is at least in part of hollow cylindrical shape.

4. The system of claim 1 , wherein the outer wall is built by a plurality of outer wall parts.

5. The system of claim 1 , wherein the device is designed in a modular manner.

6. The system of claim 1 , wherein the dividing element comprises a metal sheet which is arranged at least in part within the volume domain.

7. The system of claim 6 , wherein the metal sheet extends in at least one of an axial direction or a radial direction within the volume domain.

8. The system of claim 1 , wherein the dividing element extends into the volume domain from an inner circumferential side of the outer wall.

9. The system of claim 1 , wherein the dividing element has an angle of 90 degrees with the outer wall.

10. The system of claim 1 , wherein the dividing element is designed in one piece with the outer wall.

11. The system of claim 1 , wherein the dividing element is arranged on the outer surface area of the sleeve shaft when the device is mounted on the sleeve shaft.

12. The system of claim 1 , wherein the dividing element is reduced in at least one of axial extension or radial extension such that within the volume domain the overflow area is provided so that the fluid can flow from a first volume part domain to a second volume part domain.

13. The system of claim 1 , wherein the dividing element comprises two dividing elements, which are arranged along an inner circumference of the outer wall in equal distant angles.

14. The system of claim 1 , wherein at least one of the following is satisfied:
(i) the device comprises a second end section of conical form, the second end section being at least one of an end section facing towards a fluid outlet or an end section opposite of a first end section of the device; or
(ii) the outer wall widens out conically at the second end section of the device.

15. The system of claim 1 , wherein at least one of the following is satisfied:
the volume domain is designed in a cross sectional plane like a ring; or
at least one of the volume part domains is designed in the cross sectional plane like a section of a ring.

16. The system of claim 1 , wherein at least one of the following is satisfied:
the device further comprises an inner wall, and the volume domain is enclosed at least in part between the outer wall and the inner wall, wherein the inner wall is or can be at least area by area in direct or indirect contact with the outer surface area of the sleeve shaft when the device is mounted at the sleeve shaft; or
the device further comprises a back wall, which limits the volume domain at least in part in an axial direction.

17. The system of claim 1 , wherein the outer surface area of the sleeve shaft to which the device is mounted is covered in part or completely by an insulator.

18. The system of claim 1 , wherein the device extends in at least one axial direction across the sleeve shaft for a length of between 0.4 and 0.8 times of the sleeve shaft.

19. The system of claim 1 , wherein the sleeve shaft is inserted into the refractory tube.

20. The system of claim 19 , wherein the sleeve shaft is inserted into the refractory tube in a coaxial manner.

Assignees

• Schott Ag

Inventors

• Münch Wolfgang
• Fuchs Roland
• Rösel Gregor

Classifications

• C03B17/04 Primary

  Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles · CPC title

• C03B7/094 Primary

  Means for heating, cooling or insulation · CPC title