Maintenance-free rotating compensator

Abstract

A maintenance-free rotating compensator comprises an outer pipe (1) and an inner pipe (2) and is characterized in that a flange (5) is arranged in the middle of the inner pipe, a locating ring (4) and a sealing sleeve (3) are sequentially arranged on the right side of the flange in a sleeving mode, and the pipe portion of the sealing sleeve is in sealing contact with the outer circle of the inner pipe; the pipe portion of the sealing sleeve extends into the outer pipe, a gap is reserved between the pipe portion of the sealing sleeve and the inner wall of the outer pipe, a flange (7) is arranged at the left end of the outer pipe, and the left end of the sealing sleeve is located on the left side of the flange along a convex edge which extends in the radial direction; multiple bolts (8) penetrate through the locating ring, the convex edge of the sealing sleeve and the flange, a nut located at the left end of the bolt is screwed up so that the convex edge of the sealing sleeve presses the flange, and the sealing sleeve is made of a silicon rubber material. Due to the fact that the sealing sleeve is made of the silicon rubber material, after the inner wall of the sealing sleeve is abraded, the elasticity of silicon rubber still enables the pipe portion of the sealing sleeve to make contact with the inner pipe in a sealing mode, the sealing performance is maintained, maintenance workload is greatly reduced, and compared with an existing rotating compensator, the service life of the maintenance-free rotating compensator is prolonged.

Description

technical field [0001] The invention relates to a rotary compensator, which is used for compensating thermal expansion and contraction of heating pipelines. Background technique [0002] The structure of the existing rotary compensator includes an outer tube and an inner tube. One end of the inner tube is extended in the outer tube. The overlapping part of the outer tube and the inner tube is provided with a graphite sealing packing. When the heating pipeline undergoes linear expansion, the outer tube and the inner tube The relative rotation occurs between the tubes to realize the compensation for the heating pipeline. The relative rotation between the outer tube and the inner tube will cause the sealing packing to wear, and the sealing performance of the rotary compensator will gradually decrease. Therefore, after a period of operation, the sealing packing of the rotary compensator needs to be compressed to make the sealing packing Stretches snugly over the outer and in...

AI Technical Summary

Problems solved by technology

Due to the on-site maintenance, it is impossible to judge whether the sealing packing is evenly attached to the outer tube and the inner tube, which often causes unilateral compression, aggravates the wear of the sealing packing, increases the maintenance workload of the sealing performance of the rotary compensator, and shortens the rotation time. The service life of the compensator

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