Inlay, sleeve shaft with inlay and refractory tube with sleeve shaft

Patent metadata

Field	Value
Publication number	US-11820692-B2
Application number	US-202117334893-A
Country	US
Kind code	B2
Filing date	May 31, 2021
Priority date	May 29, 2020
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

An inlay for a sleeve shaft for collecting particles originating from a material of the sleeve shaft at least in part, at least one fluid being flowable through the sleeve shaft along an axial direction which is parallel to a main extension of the sleeve shaft, the inlay includes at least one first wall section and the inlay is inserted or insertable at least in part into the sleeve shaft such that at least one part of the first wall section has a radial distance from at least one first area of an inner surface of the sleeve shaft, and, hence, that the inlay together with the first area of the inner surface of the sleeve shaft encloses at least one volume domain, which volume domain is limited in the axial direction by a limiting element.

First claim

What is claimed is:

1. An inlay for a sleeve shaft for collecting particles originating from a material of the sleeve shaft at least in part, at least one fluid being flowable through the sleeve shaft along an axial direction which is parallel to a main extension of the sleeve shaft, the inlay comprising at least one first wall section and the inlay is inserted or insertable at least in part into the sleeve shaft such that at least one part of the first wall section has a radial distance from at least one first area of an inner surface of the sleeve shaft, and, hence, that the inlay together with the first area of the inner surface of the sleeve shaft encloses at least one volume domain, which volume domain is limited in the axial direction by a limiting element comprised by the inlay, wherein the inlay comprises at least one zone of cylindrical form, and a first shell of at least one first section of the cylindrical zone comprises the first wall section, wherein the first section comprises at least one first end section of the inlay, wherein the cylindrical zone has at least one second section, which is different to the first section of the cylindrical zone, with a second shell comprising at least one second wall section, wherein a first outer diameter of the first wall section is smaller than a second outer diameter of the at least one second wall section, the at least one second section comprising at least one second end section of the inlay.

2. The inlay of claim 1 , wherein the particles, which are moving at least in part mediated by at least one of a fluid flow or gravity along the inner surface of the sleeve shaft along the axial direction, reach the volume domain and get trapped, hence, are prevented from moving further along the axial direction.

3. The inlay of claim 1 , wherein
the second section follows after the first section along the axial direction.

4. The inlay of claim 1 , wherein the limiting element is formed by at least one transition from the first wall section to the second wall section.

5. The inlay of claim 4 , wherein the transition is designed in at least one cross sectional plane at least one of in the form of at least one step or in the form of at least one arc segment.

6. The inlay of claim 1 , wherein the limiting element is at least one of formed or arranged in at least one end section of the first wall section.

7. The inlay of claim 6 , wherein at least one of the following is fulfilled:
the limiting element is in one piece with the first wall section; or
the end section of the first wall section is facing away from the at least one first end section of the inlay.

8. The inlay of claim 1 , wherein the inlay comprises at least one stop element and the at least one stop element is at least one of:
designed in the form of at least one collar;
designed at least in part in one piece with the limiting element;
designed at least in part in one piece with the second wall section; or
provided in at least one end section of the inlay.

9. The inlay of claim 1 , wherein the inlay comprises at least one of:
at least one fastener for arranging the inlay at the sleeve shaft;
at least one distant element; or
at least one stop element.

10. The inlay of claim 1 , wherein at least one of the following is fulfilled:
the inlay is connected or connectable with the sleeve shaft by at least one of welding, in a positive locking manner, or in a frictional locking manner; or
the volume domain is at least in part in the form of at least one ring volume.

11. The inlay of claim 1 , wherein the particles comprise at least one of oxidation products of material of the sleeve shaft, cinder particles or corrosion particles.

12. The inlay of claim 11 , wherein the particles are created by the reaction of steel together with oxygen at temperatures of between 1000 to 1500 degrees C.

13. The inlay of claim 1 , wherein the inlay is configured to at least one of not substantially affect the fluid flow within the sleeve shaft negatively or not substantially affect the shape, the quality or the geometric properties of a produced glass tube strand.

14. A sleeve shaft, comprising:
at least one inlay for collecting particles originating from material of the sleeve shaft at least in part, wherein at least one fluid is flowable through the sleeve shaft along an axial direction which is parallel to a main extension of the sleeve shaft, the at least one inlay comprising at least one first wall section and the at least one inlay is inserted at least in part into the sleeve shaft such that at least one part of the first wall section has a radial distance from at least one first area of an inner surface of the sleeve shaft, and, hence, that the at least one inlay together with the first area of the inner surface of the sleeve shaft encloses at least one volume domain, which volume domain is limited in the axial direction by a limiting element comprised by the at least one inlay, wherein the at least one inlay comprises at least one zone of cylindrical form, and a first shell of at least one first section of the cylindrical zone comprises the first wall section, wherein the first section comprises at least one first end section of the at least one inlay, wherein the cylindrical zone has at least one second section, which is different to the first section of the cylindrical zone, with a second shell comprising at least one second wall section, wherein a first outer diameter of the first wall section is smaller than a second outer diameter of the at least one second wall section, the at least one second section comprising at least one second end section of the at least one inlay.

15. The sleeve shaft of claim 14 , wherein the sleeve shaft and the at least one inlay are arranged in a coaxial manner.

16. The sleeve shaft of claim 14 , wherein the sleeve shaft comprises at least one of steel, chromium-nickel steel, or 2.4633 steel as material.

17. A refractory tube for use in a glass tube drawing process, the refractory tube comprising:
at least one outer surface comprising at least one of platinum or at least one platinum alloy; and
a sleeve shaft inserted into the refractory tube, the sleeve shaft comprising at least one inlay for collecting particles originating from material of the sleeve shaft at least in part, wherein at least one fluid is flowable through the sleeve shaft along an axial direction which is parallel to a main extension of the sleeve shaft, the at least one inlay comprising at least one first wall section and the at least one inlay is inserted at least in part into the sleeve shaft such that at least one part of the first wall section has a radial distance from at least one first area of an inner surface of the sleeve shaft, and, hence, that the at least one inlay together with the first area of the inner surface of the sleeve shaft encloses at least one volume domain, which volume domain is limited in the axial direction by a limiting element comprised by the at least one inlay, wherein the at least one inlay comprises at least one zone of cylindrical form, and a first shell of at least one first section of the cylindrical zone comprises the first wall section, wherein the first section comprises at least one first end section of the at least one inlay, wherein the cylindrical zone has at least one second section, which is different to the first section of the cylindrical zone, with a second shell comprising at least one second wall section, wherein a first outer diameter of the first wall section is smaller than a second outer diameter of the at least one second wall section,

Assignees

• Schott Ag

Inventors

• Trinks Volker

Classifications

• C03B17/04 Primary

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

• C03B15/14 Primary

  Drawing tubes, cylinders, or rods from the melt · CPC title

• C03B23/047

  by drawing ({C03B23/091} , C03B37/025 takes precedence) · CPC title