Tool for testing internal insulation of sleeve

The utility model relates to the technical field of test equipment, in particular to a tool for testing insulation in a sleeve, which comprises an upper barrel and a lower barrel which jointly define a closed test cavity, a lower port of the upper barrel and an upper port of the lower barrel are connected in a sealing manner, and a support frame for erecting insulation of a high-voltage sleeve to be tested is arranged at the connection position. The upper port of the upper barrel is provided with an upper sealing plate, the lower port of the lower barrel is provided with a lower sealing plate, and the upper sealing plate and the lower sealing plate are conductive plates and are connected with a high-voltage bushing to be tested through conductive wires; the test chamber is filled with insulating oil. The tested high-voltage bushing is erected in the test chamber through the support frame, the closed space can prevent the test from discharging to the outside air, the tested high-voltage bushing is completely w