Refractory protective blocks and protective wall structure of boiler using same
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United States of America Patent
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-
Dec 8, 1998
Grant Date -
N/A
app pub date -
Aug 29, 1996
filing date -
Sep 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A refractory protective block protects heat exchange means connecting tubes to fins. The refractory protective block has an inside complementary shape corresponding to the surface shape of the heat exchange means and the refractory protective block is provided with recesses into which projections formed on the tubes are fitted and received. A pair of projections formed on the two adjacent tubes in the heat exchange means are arranged so as to confront each other. The refractory protective block has a high durability which does not break even when heat exchange means expand more than the refractory block at the time of the repetition of heating and cooling and which enable the dispersion of strain at the time of the repetition of expansion and contraction.
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