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:
Jul. 29, 2025
Filed:
Aug. 01, 2022
State Grid Anhui Electric Power Research Institute, Anhui, CN;
State Grid Corporation of China, Beijing, CN;
Jiaqing Zhang, Anhui, CN;
Yong Huang, Anhui, CN;
Yifu Zhou, Anhui, CN;
Jinzhong Li, Anhui, CN;
Xiaodong Zhang, Anhui, CN;
Dengfeng Cheng, Anhui, CN;
Sha Luo, Anhui, CN;
Yi Guo, Anhui, CN;
Fengju Shang, Anhui, CN;
Yubiao Huang, Anhui, CN;
Rui Liu, Anhui, CN;
STATE GRID ANHUI ELECTRIC POWER RESEARCH INSTITUTE, Hefei, CN;
State Grid Corporation of China, Beijing, CN;
Abstract
The present disclosure provides an air mixer for a compressed air foam (CAF) fire-extinguishing system. A foam concentrate and compressed air are respectively transported by a liquid inlet pipe and an air inlet pipe. When the compressed air and the foam concentrate enter a straight pipe through a first tapered pipe, they reach an outlet end of the first tapered pipe through a path narrowing due to different cross-section diameters at two ends of the first tapered pipe, and there is a compression process. Under an action of a high-pressure airflow, the foam concentrate is fully mixed. The mixed foam concentrate reaches a porous plate of the straight pipe and can be mixed secondarily. When the foam concentrate is discharged by a second tapered pipe, a flow path widens and there is a release process.