Scale removing nozzle

A scale removing nozzle for removing scales on a metal surface by causing highly pressurized liquid to impact against the metal surface. Recently, in order to improve the scale removing performance, there is a demand for jetting ultra-highly pressurized water whose pressure is in the range of 30-100...

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Bibliographic Details
Main Authors HIROYOSHI ASAKAWA, TOSHIE HASHIMOTO
Format Patent
LanguageEnglish
Published 18.11.1999
Edition6
Subjects
APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
ATOMISING APPARATUS
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
NOZZLES
PERFORMING OPERATIONS
PUNCHING METAL
ROLLING OF METAL
SPRAYING APPARATUS
SPRAYING OR ATOMISING IN GENERAL
TRANSPORTING
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Summary:A scale removing nozzle for removing scales on a metal surface by causing highly pressurized liquid to impact against the metal surface. Recently, in order to improve the scale removing performance, there is a demand for jetting ultra-highly pressurized water whose pressure is in the range of 30-100MPa, but ultra-highly pressurized water like this tends to badly damage an orifice portion of the nozzle and there has been no nozzle available having sufficient durability. In the scale removing nozzle, a concave portion (12) is formed in a leading end portion (11) in a liquid injecting direction of a nozzle main body (7), the concave portion being formed such that it gets smaller in diameter toward the upstream of the liquid injecting direction, the leading end portion (11) being formed annularly and integrally with the concave portion (12) such that the leading end portion surrounds the full outer circumference of the concave portion, an outlet side of an orifice (7b) being provided such that it opens along its full circumference toward the bottom side of the concave portion (12), whereby the wear resistance of the orifice at its circumferential portion against the ultra-highly pressurized water and durability can be provided, thereby making it possible to effectively prevent early failure.
Bibliography:Application Number: AU19970011308