HEAT-EXCHANGE TUBE Russian patent published in 1997 - IPC

FIELD: heat-power engineering; chemical engineering and other industries. SUBSTANCE: heat-exchange tube 1 is fitted with axially located flexible tubular member 2 with extruded deformable circular projections 3 directed to flow. As a rule, flexible member 2 is arranged inside heat-exchange tube 1; it may be also fitted on the outside in case of longitudinal flow of heat-transfer agent around tube. Flexible tubular members 2 are in contact with heat-exchange tube 1 over its entire length. One end of flexible member 2 is rigidly fastened with wall of heat-exchange tube 1 and opposite end is fastened with heat-exchange tube 1 through device 4 which makes it possible to compress or extend flexible tubular member with circular projections. Pneumo- or hydrocylinder 5 or movable pair screw-nut 6 with vernier may be used for compression or extension, i.e. for performing function of device 4. EFFECT: enhanced reliability. 2 dwg