Cylindrical thermal protection cap

Abstract

A cylindrical thermal protection cap for covering a length of an elongated structural element ( 50 ). The cap has a sandwich-like composite insulation system ( 10, 12, 16, 18, 20 ) which has a thermal conductivity lower or equal to 0.11 W/m.° C. at 800° C. and a thickness lower than 50 millimeters.

1 . Cylindrical thermal protection cap for covering the end of an elongated structural element, said cap having a cylindrical wall and a closed end wall, said cylindrical wall defining an opening configured for introduction of the end of said elongated structural element, said cylindrical wall and said end wall comprising a sandwich-like composite insulation system which has a thermal conductivity lower or equal to 0.11 W/m.° C. at 800° C. and a thickness lower than 50 millimeters. 
     
     
         2 . Cylindrical thermal protection cap according to  claim 1 , wherein said cap has a maximum weight W max  per length unit given by:
     W   max   =K×D      
       with K between 20 to 30, D the smallest inner diameter of said sheath or cap (in m), and W max  being in Kg/m. 
     
     
         3 - 9 . (canceled) 
     
     
         10 . Cylindrical thermal protection cap according to  claim 1 , wherein said composite insulation system comprises at least:
 a second layer being a fabric made from filament and reinforcement yarns, and   a third layer covering the inner side of the second layer and comprising a thermal insulation layer essentially made from fibers.   
     
     
         11 . Cylindrical thermal protection cap according to  claim 10 , wherein said composite insulation system further comprises an outer first layer having a protective outer side, said second layer covering the inner side of said outer first layer. 
     
     
         12 . Cylindrical thermal protection cap according to  claim 11 , wherein at least two layers among the first layer, the second layer and the third layer are stitched together. 
     
     
         13 - 14 . (canceled) 
     
     
         15 . Cylindrical thermal protection cap according to  claim 10 , wherein said fibers of said third layer are made from any of the following materials: ceramic, glass or mineral composition. 
     
     
         16 . Cylindrical thermal protection cap according to  claim 10 , wherein said composite insulation system further comprises a fourth layer covering the inner side of the third layer and comprising a micro-porous thermal insulation material. 
     
     
         17 - 18 . (canceled) 
     
     
         19 . Cylindrical thermal protection sheath cap according to  claim 16 , wherein said micro-porous thermal insulation material comprises particles made of-silica and/or calcium silicate and/or alumina. 
     
     
         20 - 21 . (canceled) 
     
     
         22 . Cylindrical thermal protection sheath or cap according to  claim 16 , wherein said composite insulation system further comprises a fifth layer covering the inner side of the fourth layer, attached to the fourth layer and comprising a structural layer. 
     
     
         23 . Cylindrical thermal protection sheath or cap according to  claim 22 , wherein said fifth layer comprises a glass fabric. 
     
     
         24 . (canceled) 
     
     
         25 . Cylindrical thermal protection cap according to  claim 1 , wherein said thermal protection cap further comprises a frame placed within said composite insulation system and attached to said composite insulation system. 
     
     
         26 . Cylindrical thermal protection cap according to  claim 25 , wherein said composite insulation system comprises at least:
 a second layer being a fabric made from filament and reinforcement yarns,   a third layer covering the inner side of the second layer and comprising a thermal insulation layer essentially made from fibers, and   a fourth layer covering the inner side of the third layer and comprising a micro-porous thermal insulation material,   
       and wherein the frame is attached to said fourth layer of said composite insulation system of said thermal protection cap. 
     
     
         27 - 28 . (canceled) 
     
     
         29 . Elongated structural device comprising a tensioned cable with a running part and at least one anchorage part at the end of the cable, and at least one thermal protection cap according to  claim 1 , wherein said cylindrical thermal protection cap covers from the end of the anchorage part. 
     
     
         30 - 35 . (canceled) 
     
     
         36 . Cylindrical thermal protection cap having a cylindrical wall and a closed end wall, said cylindrical wall defining an opening for introduction of the end of an elongated element, said cylindrical wall and said end wall comprising a composite insulation system including at least:
 an outer first layer having a protective outer side,   a second layer covering the inner side of said outer first layer, said second layer being a fabric made from filament and reinforcement yarns, and   a third layer covering the inner side of the second layer and comprising a thermal insulation layer essentially made from fibers,   
       wherein at least two layers are stitched together. 
     
     
         37 . Cylindrical thermal protection cap according to  claim 36 , wherein said fibers of said third layer are made from any of the following materials: ceramic, glass or mineral composition. 
     
     
         38 . Cylindrical thermal protection cap according to  claim 36 , wherein said composite insulation system further comprises a fourth layer covering the inner side of the third layer and comprising a micro-porous thermal insulation material. 
     
     
         39 . Cylindrical thermal protection cap according to  claim 38 , wherein said micro-porous thermal insulation material comprises particles made of silica and/or calcium silicate and/or alumina. 
     
     
         40 . Cylindrical thermal protection cap according to  claim 36 , wherein at least said first and second layers are stitched together 
     
     
         41 . Cylindrical thermal protection cap according to  claim 36 , wherein said composite insulation system further comprises a fifth layer covering the inner side of the fourth layer, said fifth layer being attached to the fourth layer and comprising a structural layer. 
     
     
         42 . Cylindrical thermal protection cap according to  claim 41 , wherein said fifth layer comprises a glass fabric. 
     
     
         43 . Cylindrical thermal protection cap according to  claim 36 , wherein it further comprises a frame placed within said composite insulation system and attached to said composite insulation system.