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伸缩节一般安装在上镇墩的下侧和水轮机与进水闸阀之间。在压力钢管受温差变化产生轴向变位时,伸缩节可以自由伸缩起刭调整作用,以消除钢管的轴向应力。通常最简单的伸缩节有套管、伸缩管,压紧管和止水填料等组成部分(见图1)。这种型式的伸缩节,由于按直径分段变化较多,铸件较长较重,安装检
Telescopic joints are generally installed on the underside of the town pier and between the turbine and the inlet valve. When the pressure pipe undergoes axial displacement caused by the temperature difference, the telescopic section can freely extend and retract to adjust the axial force to eliminate the axial stress of the steel pipe. The simplest telescoping section is usually the casing, telescopic tube, compression tube and water-stop packing and other components (see Figure 1). This type of telescopic section, due to changes in diameter by more segments, the casting is longer and heavier, installation inspection