W-shaped heat storage type radiant tube

Abstract

A W-shaped regenerative radiant tube, the radiant tube includes a W-shaped tube body and a radiant tube cover; the W-shaped tube body includes a straight tube A, an elbow B, a straight tube C, and a bent tube arranged from top to bottom. The head D, the straight pipe E, the elbow F and the straight pipe G are fixed together by welding; the left side of the elbow B is welded with a support H, and the right side of the elbow D is welded with a support I, The left side of the elbow F is welded with a support J; the support H and the support J are connected and fixed by a connecting rod; the left side of the support H is located on the inner support K of the furnace wall, and the right side of the support I is located on the support L , the support L is welded on the radiant tube cover, and the W-shaped tube body can be freely expanded and contracted without hindrance in the state of thermal expansion and cold contraction; It can be freely expanded and contracted in the state without hindrance; the damage of the radiant tube is reduced, the service life of the product is improved, and the popularization and application have good economic and social effects.

Description

technical field

[0001] The invention relates to the field of radiant tubes, in particular to a W-shaped heat storage radiant tube. Background technique

[0002] In the production of cold-rolled steel strip, the steel strip after cold deformation should be heated above the recrystallization temperature in the heating furnace, so that the deformed grains can be re-transformed into uniform equiaxed grains, so as to eliminate the cold-rolled steel strip. Deformation hardening and residual stresses. In order to meet the increasingly higher requirements for the surface quality of strip steel, most modern continuous annealing furnaces for strip steel use radiant tube heating furnaces. Using this heating method, the combustion gas does not directly contact the strip steel, and will not oxidize the surface of the strip steel, and the nitrogen-hydrogen mixed protective gas is also used in the furnace, which has a certain reducing effect on the surface of the strip steel, which can en...

Images