| The directly buried heat-supply pipeline technology has developed rapidly on thedesign and construction in recent years, Northeast China is the application of the earliestand most extensive regions. The most of the renovation, expansion and new hot waterheat-supply pipeline use the directly buried heat-supply pipeline technology. In recentyears, there have been some areas of the city heat-supply using the non-compensatingand cold installation directly buried heat-supply, from the using of the results in recentyears, the practical effect is very good, but in the promotion of the non-compensatingand cold installation directly buried heat-supply when it came to the someproblems,there are some doubts existence of many experts and professors of university,so we need the researchers f the heat-supply to do more research to improve theheat-supply theory.In this paper, first of all, it has done the theoretically calculations of thenon-compensating and cold installation directly buried heat-supply, it is possible in thetheoretically. According to the problem of the heating company in practice, when usingthis method of heat-supply, heat-supply pipeline do not move when it is heating, butthrough theoretical calculation shows that heat-supply pipeline is heating, the pipelinethermal elongation, the elongation is very smaller than the whole heat-supply network.Therefore, this paper contrary to the significant differences between thetheoretically calculations and the reality, and do the experiment about thenon-compensating and cold installation directly buried heat-supply. Through theexperiment shows that the heat-supply pipeline really becomes long in heating, however, the elongation way is different to the theoretically calculations, but it happened that thewelding place of the heat-supply, where the place had the angle, it occurred swingaround. It is this swing around make the entire heat-supply pipeline to become longalong the axis of the amount distributed to each welding position are where have theslight angle, so that the non-compensating and cold installation directly buriedheat-supply do not exist the anchoring section, so that the heat-supply method can beviable if only it meet certain safety conditions. |
