Double-layer flow guide expansion joint device

Abstract

The invention relates to the technical field of expansion joint machining devices, in particular to a double-layer flow guide expansion joint device which comprises a telescopic pipe. Mounting jointsare symmetrically arranged on the left side and the right side of the telescopic pipe, flanges are connected to the other ends of the two mounting joints, and fixing frames are symmetrically arrangedat the tops and the bottoms of the two flanges. A connecting rod is arranged between the left fixing frame and the right fixing frame through pin shafts, a flow guide pipe is arranged on the inner side of the telescopic pipe, the two ends of the flow guide pipe are in sealed connection with the flanges, a cavity is formed between the two mounting joints and the telescopic pipe and the flow guide pipe, and the cavity is filled with filler. Fixing blocks are arranged on the inner walls of the two mounting joints correspondingly, buffer connecting pieces are evenly arranged on the outer walls ofthe sides, close to the flow guide pipe, of the fixing blocks, the other ends of the buffer connecting pieces are connected with the outer wall of the flow guide pipe, the buffer connecting pieces atthe top are obliquely arranged leftwards, and the buffer connecting pieces at the bottom are obliquely arranged rightwards.

Description

technical field [0001] The invention relates to the technical field of expansion joint processing devices, in particular to a double-layer guide expansion joint device. Background technique [0002] Introduction: An expansion joint is a flexible element that can effectively compensate for axial deformation. For example, the expansion joint welded on the shell of a fixed tube-sheet heat exchanger has large axial flexibility and is easy to deform. It can compensate the thermal expansion difference between the tube and the shell due to different wall temperatures, reduce their axial load, and reduce the tube load. , The temperature difference stress between the tube sheet and the shell, to avoid causing strength damage, instability damage and tube pull-off damage. There are many types of expansion joints, commonly used are corrugated, ring-plate welded and sandwich structures, among which corrugated expansion joints are the most widely used, and ring-plate welded expansion joi...

AI Technical Summary

Problems solved by technology

There are many types of expansion joints, commonly used are corrugated, ring-plate welded and sandwich structures, among which corrugated expansion joints are the most widely used, and ring-plate welded expansion joints are only suitable for normal or low pressure occasions. The existing double-layer guide In order to improve the heat insulation performance of the expansion joint, the expansion joint will fill the inner cavity of the expansion tube with heat-resistant filler, and use the heat-resistant filler to protect the expansion tube. As time goes by, in long-term use, the guide tube will be damaged. The pressure brought by the continuous flow of high-temperature medium causes the guide cylinder to vibrate. The longer the time, the greater the vibration. The gap is lost, which reduces the high temperature performance of the expansion joint and shortens the service life

Images