Abstract: The invention discloses a filler injection type compound sleeve telescopic joint. According to the technical scheme, the filler injection type compound sleeve telescopic joint comprises a movable pipe, limiting flanges, limiting bolts, compressing flanges, filler injection bolts, an outer casing pipe, a filler barrel and compression bolts. The two ends of the outer casing pipe are internally connected with the movable pipe, the filler barrel is arranged on the interlayer between the outer casing pipe and the movable pipe, the compressing flanges are arranged at the ends of the outer casing pipe, the compression bolts are arranged on the compressing flanges, the four filler injection bolts are arranged at the overlapped position of the outer casing pipe and the filler barrel and are symmetrically distributed on the two sides of the outer casing pipe, the two filler injection bolts are arranged on each side of the outer casing pipe, the limiting flanges are arranged at the end, exposed of the outer casing pipe, of the movable pipe, and the limiting flanges are connected with the compressing flanges through the limiting bolts. The filler injection type compound sleeve telescopic joint has the following advantages that through the filler injection type design, when the sealing effect is weakened, the joint can be conveniently refilled with sealing filler, and operation is easy and convenient to conduct; the sliding surface is processed through chromium plating, and therefore the joint can resist rust, corrosion, abrasion and high temperature; the two-way compensation action is achieved through the two-way characteristic, and therefore the compensation dosage is increased.
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