Intelligent inner supporting device for preventing pipeline deformation during backfilling of HDPE pipeline

The utility model relates to the technical field of pipeline engineering, in particular to an intelligent inner support device for preventing a pipeline from deforming during backfilling of an HDPE (high-density polyethylene) pipeline, which comprises an annular inner support, a support rod, a threaded sleeve, an arc-shaped gasket and a stress monitor. The annular inner support is in a circular ring shape, and the axis of the annular inner support is parallel to the axis of the pipeline. A plurality of supporting rods with adjustable lengths are uniformly distributed on the periphery of the annular inner support; the tail ends of the supporting rods are connected with arc-shaped gaskets, and the arc-shaped gaskets are attached to the inner wall of the pipeline; the annular inner support is a steel ring, four supporting rods are evenly distributed on the periphery of the annular inner support, and threaded sleeves are connected to the two ends of each supporting rod. Threads are machined at the two ends of the