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由于内压力、温度、支座摩擦力等的影响、外部热力管道在纵长方向属于压弯柔性杆件受力的范畴。所以管道固定点的跨距超过一定范围时,、即发生纵向弯曲的现象。关于一般热力管道固定点的允许跨距虽可由苏联管道设计手册查得,但由于我国新型轻质保温材料的生产以及广泛采用焊接钢管等结果,就有必要重新制订管道固定点的允许跨距,以适合我国具体情况。本文仅就管道在压弯的情况下,对纵向稳定的计算和固定点的允许跨距作一些探讨,以供参考。
Due to the influence of internal pressure, temperature, bearing friction and so on, the external heat pipe belongs to the category of forced bending of the flexible rod in the longitudinal direction. Therefore, when the span of pipeline fixed point exceeds a certain range, the phenomenon of longitudinal bending occurs. However, due to the production of new lightweight insulation materials in our country and the widespread adoption of welded steel pipes, it is necessary to reformulate the allowable span of pipe fixing points, To suit our specific situation. This article only for the pipe in the case of bending, longitudinal stability of the calculation and the allowable span of fixed point to make some discussion for reference.