Spray nozzle, especially for spraying water in fire prevention systems

US6129154A · kind A · utility

Assignee

• Minimax GmbH · DE

Inventors

• Rolf Hoffmann · Steinheim, DE
• Jorg Mucke · Oschersleben, DE
• Wilfried Heize · Harzgerode, DE

Key dates

• Filing date: Apr 22, 1996
• Grant date: Oct 10, 2000
• Expiry date: Apr 22, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B1/3447
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A spray nozzle, especially for spraying water in fire prevention systems, has a housing in which there is a vortex chamber into which a first channel into which a first channel for supplying water opens essentially tangentially at a distance from the axis of the vortex and which has a first outlet orifice coaxial with the axis of the vortex. The spray nozzle also has a second outlet orifice arranged inside the vortex chamber so it is coaxial with the first outlet orifice and is located at the end of a second channel that is coaxial with the axis of the vortex. The second channel has an enlarged area upstream from the second outlet orifice, where the cross-sectional area at right angles to the axis of the channel increases in the direction of flow. furthermore, the cross-sectional area of the second channel at right angles to the axis of the channel does not decrease further downstream from the enlargement as seen in the direction of flow. The second outlet orifice is positioned so close to and upstream from the first outlet orifice that a low pressure zone is formed in the enlarged area, distributing the flowing water to form a spray cone that comes out of the second outlet orifice…