Patent ID: 8383944
Filing Date: 2013-02-26
Classification: H02G

Abstract:
1. A metal fitting integration type stress-relief cone, comprising: a stress-relief cone which is installed at an outer circumference of a cable core and includes a rubber-like elastic body and a metal fitting which surrounds said cable core and is provided integrally at a low-voltage side of said stress-relief cone, wherein said stress-relief cone is provided with a cylindrical semi-conducting body part which is arranged at the low-voltage side and has a bell-mouthed electric-field stress-control part at an end of a high-voltage side, a cylindrical insulating body part which is arranged at the high-voltage side and whose end of the low-voltage side, which surrounds and directly contacts said bell-mouthed electric-field stress-control part, and which is concentric with said cylindrical semi-conducting body part, and a cylindrical insulation protective layer which is provided integrally with the end of the low-voltage side of said cylindrical insulating body part, surrounding and in direct contact with the outer circumference of said cylindrical semi-conducting body part, a cylindrical semi-conducting skirt part is protruded and provided toward the low-voltage side at an outer edge of the end of the low-voltage side of said cylindrical semi-conducting body part, an insulating skirt part is protruded and provided toward the low-voltage side at the end of the low-voltage side of said cylindrical insulation protective layer, and said metal fitting is provided with a first cylindrical part whose outer circumference part directly adheres tightly to an inner circumference part of said cylindrical semi-conducting skirt part, a second cylindrical part which is provided concentrically and integrally with the low-voltage side of said first cylindrical part and whose outer circumference part directly adheres tightly to the inner circumference part of said insulating skirt part, and a third cylindrical part which is provided concentrically and integrally with the low-voltage side of said second cylindrical part.