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:
Jan. 24, 2023
Filed:
Feb. 26, 2018
China Petroleum & Chemical Corporation, Beijing, CN;
China Petroleum & Chemical Corporation Qingdao Research Institute of Safety Engineering, Qingdao, CN;
Shanjun Mu, Qingdao, CN;
Chunming Jiang, Qingdao, CN;
Weihua Zhang, Qingdao, CN;
Quanzhen Liu, Qingdao, CN;
Xuqing Lang, Qingdao, CN;
Xiaodong Mu, Qingdao, CN;
Lin Wang, Qingdao, CN;
Jingfeng Wu, Qingdao, CN;
Longmei Tan, Qingdao, CN;
Zuzheng Shang, Qingdao, CN;
Rifeng Zhou, Qingdao, CN;
Jianxiang Li, Qingdao, CN;
Hui Yu, Qingdao, CN;
Abstract
A foam production method includes mixing liquid nitrogen with a foaming material to produce foam. A gas is produced in situ from liquid nitrogen. As the ratio of the volume of the gas produced by gasification of liquid nitrogen to the volume of the liquid nitrogen is relatively high, when a large gas supply flow is needed to generate a large foam flow, a liquid nitrogen storage device of a small volume can be used instead of bulky air supply devices such as high-pressure gas cylinders, air compressors, air compressor sets and the like, reducing the volume of the air supply device. In addition, the liquid nitrogen used in foaming will release nitrogen gas after the foam blast, such that the nitrogen is also able to inhibit combustion on the surface of burning materials, accelerating the extinguishing of the fire.