Explosion-proof electric heater

The utility model discloses an explosion-proof electric heater which comprises an electric heater body, a cover plate and a box body are arranged outside the electric heater body, a sliding rail is fixedly connected to the upper surface of the box body, a sliding block is arranged outside the sliding rail in a sleeved mode and is arranged in a sliding mode, and the sliding block is fixedly connected to the bottom of the electric heater body. Guide columns are symmetrically and vertically mounted on the upper surface of the box body; guide grooves are symmetrically formed in the lower surface of the cover plate, the guide grooves correspond to the guide columns in an inserted mode and are arranged in a sliding mode, and exhaust holes are formed in the surface of the cover plate. The electric heater body is installed in the cover plate and the box body, when the electric heater body needs to be overhauled and maintained, the cover plate is longitudinally lifted relative to the box body, then one end of the elec