核岛主设备锚固螺栓预紧技术的探讨

Pre-tightening technic for Anchor bolts Of Nuclear Island Equipments

核岛主设备-蒸汽发生器、稳压器以及主泵采用螺栓连接固定,螺栓连接的可靠与否关系到设备的运行安全,核岛主设备螺栓一般采用预紧后紧固。目前预紧采用螺栓拉伸机,本文针对基于新型螺母——超级螺母的预紧技术,结合工程经验,从多角度对比了二者的优缺点,探讨核岛主设备采用超级螺母预紧的可行性。

Bolting are widely used in unclear island as an reliable connection, especially in the anchor-hold of the main equipments, such as the steam generator, the pressurizer and the RCP. Those bolts should be reliably pre-tightened since they are relative to the safety of the whole nuclear project. Nowadays, aimed at different bolts, different hydraulic bolt tensioning devices are designed. A new device-super nut is introduced as an effective solution in stead of bolt tensioning device in this paper, and the advantages and disadvantages between bolt tensioning device and supernut are also given.