Electromagnetic circuit breaker delay tube with leakage-proof function

The invention discloses an electromagnetic circuit breaker time-delay tube with a leakage-proof function, and relates to the technical field of electromagnetic circuit breaker time-delay tubes, the electromagnetic circuit breaker time-delay tube comprises a fixed iron core body and a time-delay tube body, a boss in the middle of the fixed iron core body is in contact sealing with the inner wall of the time-delay tube body, the end part of the boss is provided with a first connecting column, and one end of the first connecting column is connected with a pressure spring; one end of the compression spring is connected with a second connecting column, the second connecting column is arranged on the movable iron core body, the movable iron core body is movably arranged in the time delay pipe body, time delay oil is arranged in the time delay pipe body, fusion welding bosses are arranged at the end of the fixed iron core body and the outer edge of a boss at the end of the time delay pipe body, and arc-shaped grooves are symmetrically formed in the end face of the fixed iron core body. According to the invention, the sealing effect and the sealing capability of the time-delay tube of the electromagnetic circuit breaker are improved, the sealing parts of the fixed iron core and the time-delay tube are prevented from being extruded by the time-delay oil due to thermal expansion, the service life is prolonged, the practicability is improved, the oil leakage phenomenon caused by extrusion due to expansion of the time-delay oil during a breaking capability test is avoided, and the sealing effect meets the detection requirement.