| 摘要 |
A bellows cover (20) for insulating a heat-transfer pipe according to the present invention has a multi-layered complex structure, in which an insulating material (22) of high heat-resistance and a reinforcement material (24) of high elasticity and impact-resistance are alternately and repetitively stacked. In the bellows cover (20) for insulating a heat-transfer pipe according to the present invention, the insulating material includes three minimal component layers, in which an inner insulating layer (S1) and an outer insulating layer (S2) are respectively disposed at the innermost and outermost sides, and an intermediate reinforcement layer (D1) is disposed between the inner insulating layer and the outer insulating layer and formed of a reinforcement material. A corrosion-preventing film (201) is provided on the surface of the inner insulating layer and the surface of the outer insulating layer. The insulating layer is formed of heat-resistant silicon material. The reinforcement material is formed of an aramid fiber material. According to the present invention as above, the impact-resistance and the heat-resistance are high due to the properties of the complex structure of the insulating material and the reinforcement material such that the cover does not easily deteriorate even when extension and retraction operations of the cover are carried out for a long time while repetitively in contact with high temperature working fluids. |
