Bend two-way self-limiting corrugated expansion joint

Abstract

The invention discloses a bend two-way self-limiting corrugated expansion joint which comprises an expansion joint body, bends, support assemblies, nuts and pull rods. The support assemblies are positioned on the back faces of the bends at the two ends in a riding mode respectively and are fixedly connected with the bends. The support assemblies at the two ends are connected through the pull rods and the nuts. Hinge pins I are arranged on the back faces of the bends, and hinge pins II are arranged on the side faces of the bends. Bend connecting plates of the support assemblies are arranged on the hinge pins I in a sleeved mode and are limited by baffle rings I, and side plates of the support assemblies are arranged on the hinge pins II in a sleeved mode and are limited by baffle rings II. The bend two-way self-limiting corrugated expansion joint is further characterized in that the bend connecting plate of each support assembly is in clearance fit with the corresponding hinge pin I, the side plate of each support assembly is in clearance fit with the corresponding hinge pin II, the baffle rings I are fixedly connected to the hinge pins I in a welding mode, and the baffle rings II are fixedly connected to the hinge pins II in a welding mode. The bend two-way self-limiting corrugated expansion joint is small in welding stress, small in distortion relative to the support assemblies, and long in service life.

Description

technical field [0001] The invention relates to a pipeline compensator, in particular to a transverse bellows compensator. Background technique [0002] In the styrene complete set of technology, the connecting nozzles of the first dehydrogenation reactor and the second dehydrogenation reactor are all vertically upward, and a large tie rod transverse compensation type expansion joint is often used to compensate the first dehydrogenation reactor and the second dehydrogenation reactor. The thermal expansion displacement difference between the hydrogen reactors, the tie rods of the large tie rod transverse compensation type expansion joints are installed on the end pipes. However, since the nozzle of the dehydrogenation reactor is vertically upward, two elbows must be provided to connect the horizontal pipeline. The transverse bellows compensator used to connect the first dehydrogenation reactor and the second dehydrogenation reactor in the prior art includes expansion joints,...

AI Technical Summary

Problems solved by technology

The transverse bellows compensator of this structure can meet the compensation needs of the thermal expansion displacement difference between the first dehydrogenation reactor and the second dehydrogenation reactor, but there are the following defects: because the whole support assembly is fixedly connected by welding On the elbow, the welding area is large, the welding deformation is large, and a large welding stress is generated. The support components at both ends may work under the condition of distortion, which affects the normal use of the transverse bellows compensator. The transverse bellows compensation Short service life of the device

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