Inner ceramic tube in particular for a glove finger-shaped radiant tube for recirculation
First Claim
1. An inner ceramic tube in particular for a radiant tube for recirculating burnt gases supplied by a burner and comprising a tubular shell coaxially surrounding said inner tube, the latter consisting of a plurality of axially aligned tube sections assembled through assembling means comprising an annular member coaxially surrounding the tube sections at the junction area, wherein the improvement consists in that said tube sections are arranged end to end and the assembling means consist each one of a sleeve coaxially surrounding the ends of the tube sections to be connected together and the radially inner surface of which advantageously comprises in the middle of its length an annular collar radially projecting inwards and fitting between both tube sections to be interconnected, the inner surface portions located on either side of said collar widening gradually towards the ends of said sleeve whereas said annular collar has substantially the same inner diameter as the tube sections and its outer diameter is slightly greater than the outer diameter of these tube sections so as to allow a suitable axial offset of the tube sections.
1 Assignment
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Accused Products
Abstract
An inner tube for a radiant tube for recirculating burnt gases supplied by a burner, consisting of a plurality of axially aligned assembled tube sections arranged end to end whereas the assembling means consist each one of a sleeve coaxially surrounding the ends of said sections to be interconnected and the radially inner surface of which comprises in the middle of its length an annular collar projecting radially inwards and fitting between both tube sections to be connected together, the inner surface portions which are located on either side of the collar widening gradually towards the sleeve ends.
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Citations
6 Claims
- 1. An inner ceramic tube in particular for a radiant tube for recirculating burnt gases supplied by a burner and comprising a tubular shell coaxially surrounding said inner tube, the latter consisting of a plurality of axially aligned tube sections assembled through assembling means comprising an annular member coaxially surrounding the tube sections at the junction area, wherein the improvement consists in that said tube sections are arranged end to end and the assembling means consist each one of a sleeve coaxially surrounding the ends of the tube sections to be connected together and the radially inner surface of which advantageously comprises in the middle of its length an annular collar radially projecting inwards and fitting between both tube sections to be interconnected, the inner surface portions located on either side of said collar widening gradually towards the ends of said sleeve whereas said annular collar has substantially the same inner diameter as the tube sections and its outer diameter is slightly greater than the outer diameter of these tube sections so as to allow a suitable axial offset of the tube sections.
Specification