Method of replacing heating tubes of a heating chamber

US5992019A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Karl May · Bad Vilbel, DE
• Hartmut Herm · Dreieich, DE
• Karlheinz Unverzagt · Offenbach am Main, DE

Key dates

• Filing date: Feb 17, 1998
• Grant date: Nov 30, 1999
• Expiry date: Feb 17, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/4973
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Method of replacing inner heating tubes in a heating chamber where the heating tubes are replaced by cutting the collars at pre-designated points on the two ends of the heating tube such that the welding seams holding the heating tube are removed. The collar containing a length compensator can be cut either before or after the length compensator depending on whether replacement of the length compensator is desired. The heating tubes are removed by moving the heating tubes out of the interior of the drum chamber through an opening in one of the two ends of the heating tube. New heating tubes containing an impact shell and a centering bushing, are inserted through an opening in one of the two ends of the heating tube. After a heating tube is inserted, the heating tube is raised such that the centering bushing can be inserted and centered in the collar. Then the heating tubes are welded at their two ends to the bushing of the collars.