US 12,354,766 B2
Large-tonnage disc-shaped suspension ceramic insulator and prestressing assembling device and method for same
Xiaoyong Xu, Hefei (CN); Jiasheng Liu, Pingxiang (CN); Hui Wei, Hefei (CN); Fenping Chen, Pingxiang (CN); Lin Xu, Pingxiang (CN); Linmin Xu, Hefei (CN); Zhiying Zhou, Pingxiang (CN); Jianguo Deng, Pingxiang (CN); and Minghua Liu, Pingxiang (CN)
Assigned to CHAOHU UNIVERSITY, Hefei (CN); and PINGXIANG BEST INSULATOR GROUP CO., LTD, Pingxiang (CN)
Filed by CHAOHU UNIVERSITY, Hefei (CN); and PINGXIANG BEST INSULATOR GROUP CO., LTD, Pingxiang (CN)
Filed on Jan. 12, 2025, as Appl. No. 19/017,745.
Application 19/017,745 is a continuation of application No. PCT/CN2024/138367, filed on Dec. 11, 2024.
Claims priority of application No. 202410598244.8 (CN), filed on May 15, 2024.
Prior Publication US 2025/0149207 A1, May 8, 2025
Int. Cl. H01B 17/02 (2006.01); C04B 14/30 (2006.01); C04B 16/06 (2006.01); C04B 18/14 (2006.01); C04B 22/10 (2006.01); C04B 24/08 (2006.01); C04B 24/26 (2006.01); C04B 28/06 (2006.01); C04B 38/02 (2006.01); H01B 19/00 (2006.01); C04B 103/30 (2006.01); C04B 103/32 (2006.01); C04B 103/50 (2006.01); C04B 111/00 (2006.01)
CPC H01B 17/02 (2013.01) [C04B 14/303 (2013.01); C04B 16/0633 (2013.01); C04B 18/146 (2013.01); C04B 22/10 (2013.01); C04B 24/08 (2013.01); C04B 24/2647 (2013.01); C04B 28/06 (2013.01); C04B 38/02 (2013.01); H01B 19/00 (2013.01); C04B 2103/302 (2013.01); C04B 2103/32 (2013.01); C04B 2103/50 (2013.01); C04B 2111/00663 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A large-tonnage disc-shaped suspension ceramic insulator, comprising a ceramic insulator body, a metal pin and a metal cap, wherein the metal pin and the metal cap are coaxially assembled with the ceramic insulator body through adhesive material, and the adhesive material comprises an expansion agent and a toughening agent;
the expansion agent is configured to make the adhesive material expand after hardened so as to create a prestress between the ceramic insulator body and the metal pin and between the ceramic insulator body and the metal cap; the toughening agent comprises: 72-82 wt % of alpha-alumina (α-Al2O3), 15-22 wt % of yttrium-stabilized zirconia with yttrium oxide in a mole fraction of 8%, and 3-7 wt % of a flux; the flux is one or more selected from a group consisting of calcium carbonate, silicon dioxide and magnesium carbonate; and the toughening agent is prepared by firing at 1,610° C., crushing, and sieving, with a particle size of 0.30-0.35 mm;
the adhesive material has a formula comprising following components by mass: 35-50 parts of modified cement, 20-35 parts of the toughening agent, 5-8 parts of the expansion agent, 2-6 parts of silica fume, 0.5-2.0 parts of an additive, and the adhesive material is doped with 2-2.5 vt % of a reinforced fiber;
the modified cement is prepared from a mixture comprising 85-90 wt % of Portland cement P.II525 and 10-15 wt % of sulfoaluminate cement; the Portland cement P.II525 has a specific surface area of 330-350 m2·kg−1, while the sulfoaluminate cement has a specific surface area of 510-550 m2·kg−1; and the mixture has a particle size of D50=1.5-2.3 μm;
the expansion agent has a chemical composition of 83-86 wt % of magnesium oxide, 4-6 wt % of calcium oxide, 5-8 wt % of silicon dioxide, and 1-3 wt % of other component; and the other component is one or more selected from a group consisting of alumina, sulfur trioxide, and iron oxide;
the additive comprises a water reducer and a defoamer; the water reducer is JH-16 polycarboxylate superplasticizer, with a pH of 5-7 and a specific weight of 1.02-1.05; and the defoamer is a water-based active mineral oil defoamer, with a volatile organic compounds (VOC) content less than 0.1% and a solid content of 100%;
the reinforced fiber is a polypropylene fiber or a nylon fiber, with a strength of 106-115 cN/dtex and a length of 3-5 mm; and
assembly interfaces of the ceramic insulator body, the metal cap, and the metal pin to be assembled with the adhesive material are coated with a primer.