Composite insulators, widely used in high-voltage transmission lines, feature silicone rubber sheds that age in complex natural environments. Applying electron beam irradiation to the silicone rubber can enhance their ageing resistance and hydrophobic properties. To advance the study of sheet silicone rubber to the entire insulator, this study proposes a method utilising a 5 MeV Dynamitron accelerator for treating a irregularly structured insulator. The insulator is irradiated in a state of tilted placement and rotation about its axis to achieve a uniform and consistent dose across the sheds. The irradiation process of the insulator with electron beams is simulated using Geant4, considering both instantaneous and cumulative states separately. The deflected particles from scattering and reflection of high-energy electrons interacting with insulator components have a significant impact on the dose distribution in each shed. Moreover, an optimal tilt of 20° ensures similar irradiation doses and high uniformity across all sheds. An experimental platform is developed for rotational irradiation of the insulator to ensure stable operation. Preliminary experimental results confirm that the doses across all sheds are uniform and consistent.

中文翻译：

---

复合绝缘子伞裙电子束处理设计与试验研究

复合绝缘子广泛应用于高压输电线路，其硅橡胶伞裙会在复杂的自然环境中老化。对硅橡胶进行电子束辐照可以增强其耐老化性和疏水性能。为了将片状硅橡胶的研究推进到整个绝缘体，本研究提出了一种利用 5 MeV Dynamitron 加速器处理不规则结构绝缘体的方法。绝缘体在倾斜放置和绕其轴旋转的状态下进行辐照，以实现整个伞裙上均匀一致的剂量。利用Geant4模拟了电子束辐照绝缘体的过程，分别考虑瞬时状态和累积状态。高能电子与绝缘体部件相互作用的散射和反射所产生的偏转粒子对每个棚内的剂量分布具有重大影响。此外，20° 的最佳倾斜可确保所有棚屋内的辐照剂量相似且高度均匀。开发了绝缘子旋转辐照实验平台，确保稳定运行。初步实验结果证实，所有棚内的剂量是均匀一致的。