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:
Feb. 04, 2003
Filed:
Sep. 28, 2001
Tadashi Shiraishi, Hyogo, JP;
Takehiko Ichioka, Hyogo, JP;
Hideya Okada, Hyogo, JP;
Fumitoshi Nakao, Hyogo, JP;
Toshiyuki Kinugasa, Hyogo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A scale removing device for removes scale adhering to the interior of a shell-and-tube-heat-exchanger-type steam generator. The scale removing device is provided with a flexible lance ( ) holding a high-pressure water hose ( ) movable with respect to a tube plate, tube support plates, and heat-transfer tubes. A cleaning head ( ) is mounted to the forward end of the flexible lance. Formed inside the cleaning head is a cavitation generating nozzle hole ( ) communicating with the high-pressure water hose. Bubbles are generated at the time of cleaning, and the impact pressure generated when the bubbles collapse is propagated to remove scale over a wide range.