Heat preservation device for steam boiler pipeline

The invention belongs to the technical field of conveying pipelines, and particularly relates to a heat preservation device for a steam boiler pipeline. The heat preservation device comprises a temperature control shell, a protective sleeve is connected in the temperature control shell in a penetrating manner, a heat preservation ring is fixed in the protective sleeve, a heating ring is fixed in the heat preservation ring, an electric heating wire is wound outside the heating ring, a temperature control ring is fixed in the heating ring, a mounting ring is fixed in the temperature control ring, and the mounting ring is connected with a steam pipeline in a sleeving manner; a temperature conducting ring is arranged in the temperature control shell, and the temperature conducting ring is fixedly connected with the temperature control ring; and by arranging the heat preservation ring, the heating ring and the temperature control ring, effective heat preservation is conducted on the temperature of the steam pipeli