The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2026
Filed:
Dec. 06, 2022
Electric Power Research Institute. China Southern Power Grid, Guangzhou, CN;
Shuai Hou, Guangzhou, CN;
Mingli Fu, Guangzhou, CN;
Lei Jia, Guangzhou, CN;
Lingmeng Fan, Guangzhou, CN;
Yunpeng Zhan, Guangzhou, CN;
Wenbo Zhu, Guangzhou, CN;
Baojun Hui, Guangzhou, CN;
Bin Feng, Guangzhou, CN;
Jie Liu, Guangzhou, CN;
ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID, Guangzhou, CN;
Abstract
Granulation method and device for crosslinked polyethylene cable insulating material having voltage grade of at least 500 kV are provided. The method includes: controlling melt extrusion system to melt insulating material; directing the melt into melt gear pump through first branch flow channel; measuring pressures at inlet and outlet of the melt gear pump, and calculates first pressure difference Δp; rotational speed of melt gear pump is adjusted such that Δpapproximates to 0; measuring pressures at inlet and outlet of capillary mold, and calculate second pressure difference Δp; volume flow rate Q of the melt flowing into capillary mold is obtained based on number of steps of rotation of melt gear pump; shear rate, shear stress and shear viscosity η of the melt are obtained based on Q and Δp; and adjusting process parameters, adjusting η to obtain adjusted η', and causing η′ to be within processing-suitable viscosity range.