METAL BLOCK THERMAL INSULATION (MBTI) Russian patent published in 2023 - IPC F16L59/14 

FIELD: thermal insulation.

SUBSTANCE: invention is related to metal block thermal insulation (MBTI) made of heat-insulating blocks. Each MBTI block contains inside a set of unified, coaxial self-attaching cylindrical membranes made of stainless steel sheet 0.09-0.1 mm thick. Internal devices (ID) of heat-insulating blocks (HIB) of MBTI consist of uniform, for a given radius of the heat-insulated surface, unified and self-fastening membranes without additional fasteners. The reduced thickness of the walls and cover of the HIB, as well as the reduced heat transfer by thermal conduction, serve to optimize the thickness of the heat-insulating blocks from 160 mm to 84 mm. Simple and quick assembly of the ID is not inferior in terms of assembly and quality of manufacture and installation of heat-insulating blocks of the removable block thermal insulation. When the shell of the heat-insulating modules breaks, glass fibre cannot enter the coolant circuit and the reactor core. Fastening of thin-walled sheets of membranes that perform heat-insulating functions, protects the membranes from the effects of temperature and force factors with the maximum efficiency. MBTI blocks, consisting of thin-walled, axisymmetric coaxial membranes, have low metal consumption and the most favourable physical properties in terms of breaking and compression, uniformly distributed forces of bending moments along the perimeter and length of the heat-insulated surface. There is an additional increase in the composition of the thermal insulation of the radiation protection material (metallic membranes of MBTI) against gamma radiation for the equipment and pipelines of the reactor compartment while reducing the total weight of the insulation. Due to the use of self-compensating locks on the covers and sockets on the bottoms of the blocks, opening of thermal gaps between the side faces of the MBTI is prevented to the maximum possible extent.

EFFECT: design of tension locks has been simplified and their weight has been reduced; the height of the side and end walls of the blocks has been optimized, and with them the thickness of the insulation as a whole. MBTI heat-insulating blocks can significantly increase the operational reliability of heat-insulating blocks.

1 cl, 12 dwg, 2 tbl