Patent ID: 6152087
Filing Date: 2000-11-28
Classification: F22B,F23J,F28F,Y10S,Y10T

Abstract:
A boiler tube protector having a cylindrical or partially-cylindrical shape and adapted to be attached with mortar around an outer peripheral surface of a boiler tube, said boiler tube protector comprising:a plurality of partially-cylindrical ceramic bodies for surrounding a boiler tube, said ceramic bodies having complimentary parting surfaces for defining a gap between abutting complimentary parting surfaces of adjacent ceramic bodies when the ceramic bodies are attached with mortar around a boiler tube; andmeans for restraining slippage along the parting surfaces of each of ceramic bodies in the axial direction of a boiler tube upon which said bodies are to be mounted, said slippage-restraining means comprising:at least one projection extending outwardly in the circumferential direction from an abutting parting surface of at least one ceramic body wherein the axially upper surface of at least one said projection on at least one ceramic body is a planar surface, which when the associated ceramic body is attached to a substantially vertical tube said surface inclines upwardly from the abutting parting surface from which it extends;at least one recess extending inwardly in the circumferential direction from an abutting parting surface of at least one other ceramic body wherein the axially upper surface of at least one said recess in at least one other ceramic body is a planar surface which when the associated ceramic body is attached to a substantially vertical tube said upper surface of said recess inclines downwardly to the abutting parting surface to which it extends; andthe lengths of said projections and said recesses, respectively, in said axial direction are such that a projection can fit into a recess when moved thereinto in the circumferential direction so that abutment in the axial direction of said upwardly and downwardly inclining surfaces restrains slippage along abutting complimentary parting surfaces of their associated ceramic bodies.