Convenient-to-disassemble and assemble self-limited supporting device for municipal pipeline overhauling

The invention discloses a convenient-to-disassemble and assemble self-limited supporting device for municipal pipeline overhauling. The device comprises a base body, a containing groove, a supportingblock and a movable block, wherein the containing groove is formed in the inner side of the upper end of the base body, and the supporting block is arranged on the outer side of the containing groovein a penetrating mode; first pull ropes are connected to the outer side of the lower end of the supporting block through bearings, and the first pull ropes are connected with the inner surface of theupper end of the base body; and connecting shafts are arranged at the outer end of the base body in a nested mode, the connecting shafts are connected with the tail ends of the first pull ropes, and first torsional springs are fixedly connected to the outer surfaces of the middle ends of the connecting shafts. According to the convenient-to-disassemble and assemble self-limited supporting device the for the municipal pipeli