Pre-positioning supporting device for pipeline in concrete

The utility model relates to the technical field of concrete inner pipeline construction, in particular to a concrete inner pipeline pre-positioning supporting device which comprises an inner pipeline, the outer portion of the inner pipeline is movably connected with two fixing plates in a sleeved mode, containing grooves are formed in the top and the bottom of each fixing plate, and extending mechanisms are arranged in the containing grooves. The extension mechanism comprises two driving rods, the driving rods are rotatably mounted on the inner bottom wall of the upper accommodating groove, the driving rods penetrate through the fixing plate and extend into the lower accommodating groove, a first screw rod is fixedly mounted at the top of each driving rod, and a second screw rod is fixedly mounted at the bottom of each driving rod. According to the pre-positioning supporting device for the concrete inner pipeline, by arranging the extending mechanism, the adjusting mechanism and the fastening mechanism, pre-