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3. 发明专利

JPH02251095A HEAT EXCHANGER 失效
公开(公告)号：JPH02251095A
公开(公告)日：1990-10-08
申请号：JP7345389
申请日：1989-03-25
申请人： KAWASAKI HEAVY IND LTD
发明人： MIDORIYAMA SHIGERU , NAKAGAKI SHOGO , OSAKI TOSHIO
IPC分类号： G21D1/00 , F28F9/02
摘要： PURPOSE:To obtain the smooth configuration of a tube plate and reduce a thermal stress generated upon the transition of heat by a method wherein the configuration of the water vapor side of the tube plate is made spherical, the inner surface of a root section is provided with a spherical shape made by extending the upper surface of the spherical tube plate, the thickness of the rim section of the outer periphery of the tube plate is thinned, the diameter of the lower side root section is expanded larger than the same of the tube plate connected to the shell of sodium side and the thickness of the lower side root section is made thinner than the thickness of the tube plate connected to the same. CONSTITUTION:The water vapor side of an upper tube plate 13 is formed so as to be spherical while the inner surface of a root section 30, connected to the upper mirror plate 14 of water vapor side through a flange 33, is formed so as to have a spherical configuration made by extending the upper surface of the spherical tube plate. The thickness of a rim section 31 around a range L of the upper tube plate 13, in which heat transfer tubes 12 are provided, is made thinner than the thickness of the root section 30. The diameter of a root section 32, connected to the shell 5 of sodium side, is expanded from the rim section 31 toward the lower part than the upper tube plate 13 with some radius of curvature and the thickness of the same is thinned. A lower tube plate 17 is formed so as to have the same configuration as the upper tube plate 13. According to this method, the water vapor side is provided with a smooth configuration having few discontinuous structure and, therefore, a thermal stress concentrating coefficient may be reduced and a thermal stress, generated at the root section 30 upon the transition of heat, may be mitigated.

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