Heat preservation device of jerusalem artichoke enzyme fermentation tank

The utility model discloses a jerusalem artichoke enzyme fermentation tank heat preservation device which comprises a base and a tank body, a heat preservation groove is formed in the upper end of the base, heat preservation cotton is fixedly connected to the inner wall of the heat preservation groove, the bottom end of the tank body is located in the heat preservation groove, a first heat preservation layer and a second heat preservation layer are arranged on the two sides of the tank body respectively, and the first heat preservation layer is connected with the base through a stretching mechanism. The stretching mechanism comprises a mounting groove, two transverse rods, a sliding block and two springs, the second heat preservation layer is fixedly connected to the base, the first heat preservation layer and the second heat preservation layer are connected through two limiting mechanisms, and each limiting mechanism comprises a first mounting block, a second mounting block, a plurality of insertion blocks,