Thermal expansion and cold contraction experimental device for primary school

The utility model discloses a primary school thermal expansion and cold contraction experiment device which comprises a bearing plate and a power line arranged on the side face of the bearing plate, a lifting support is arranged on the upper side face of the bearing plate, and the lifting support further comprises a clamping groove formed in the side face of the lifting support in a penetrating mode. The embedding plate is arranged on the lower side face of the lifting support, the meshing groove is formed in the side face of the embedding plate, a cylinder block is further arranged on the side face of the lifting support, a power line is inserted into the cylinder block, the electric heating plate is electrically driven to heat, and the heating tank embedded in the first embedding groove is driven to heat, so that water in the heating tank is heated; then, a second switch valve and a first switch valve are screwed and opened, so that hot water in the heating tank enters one group of transparent water storage