A half-value compensator for different diameters of hot water heating pipes and its laying method

Abstract

The invention discloses a different-diameter half-value compensator for hot water heat supply pipes and a laying method thereof. One end is connected to a different-diameter diversion ring with a flared mouth in the outer straight pipe, and the large-diameter end of the different-diameter diversion ring fits the inner wall of the outer straight pipe. The outer straight pipe is connected to the large-diameter pipe, and the inner straight pipe is connected For the small-diameter pipe, when the temperature of the hot water passing through the inner straight pipe and the outer straight pipe reaches the middle temperature of the cycle to make it stable in expansion and contraction, the inner straight pipe and the outer straight pipe are welded together as a whole. The invention replaces the common variable diameter pipe, saves the need to install compensators or fixed piers on both sides of the variable diameter pipe for protection, saves investment, and reduces the source of failure; when installing, the long straight pipe can be backfilled on the top of the pipe after laying , only the construction space of the compensator is reserved, and the scope of construction influence is small.

Description

technical field [0001] The invention relates to the technical field of directly buried hot water pipeline engineering for urban heating, in particular to a half-value compensator for different diameters of hot water heating pipes and a laying method thereof. Background technique [0002] The heating prefabricated thermal insulation pipe laid by direct burial includes a main pipe with a larger diameter, a branch pipe with a smaller diameter and a reducing pipe connected between them. After the pipeline is put into use, the pressure inside the pipeline will increase to no more than 2.5MPa, and the temperature inside the pipeline will rise to no more than 130 degrees Celsius. After the pipeline is heated, there will be a high three-dimensional stress. Due to the change of the structure of the variable diameter tube, that is, the discontinuity, the comprehensive stress on the variable diameter tube accumulates. The peak stress at the welding point of the small head of the variab...

AI Technical Summary

Problems solved by technology

However, the set fixed pier needs to bear the thrust ranging from tens of tons to hundreds of tons. The fixed pier is very bulky, and sometimes the pipeline route is not even suitable for implementation; The lateral displacement of the nearby branches is reduced, causing the redistribution of heat and thermal elongation of the piping system, which increases the difficulty of design and construction

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