Descaling nozzle
First Claim
1. A descaling nozzle comprising a threaded body for placement in a threaded opening of a pressurized fluid header, the screw-threads of said body being near the forward end of the body and the body being elongated and extending substantially rearwardly of the screw-threads, whereby the body can extend deeply into the interior of a header, the body having a rear forwardly tapering venturi entrance passage for fluid, a restricted throat forwardly of the entrance passage and an enlarged forward threaded recess forwardly of said throat, the body having a permanent indicator element on the exterior thereof near its forward end to facilitate precise angular alignment of the nozzle orifice when the descaling nozzle is assembled with a header, a nozzle tip unit disposed within said threaded recess of said body and including a nozzle tip having a spray orifice, precision angle locator means for said orifice on said body and nozzle tip unit, and a threaded retaining sleeve for the nozzle tip unit engaged in said threaded recess of the body and having a through bore receiving said tip unit, and said tip unit including an enlarged head within the threaded recess and inwardly of the threaded retaining sleeve and being clamped between the rear end of the retaining sleeve and the opposing end wall of the threaded recess.
1 Assignment
0 Petitions
Accused Products
Abstract
A descaling nozzle for hot rolled metal strips in a rolling mill has a more simplified construction for economical manufacturing and ease of installation and replacement of nozzle spray tips. A spray water venturi entrance passage in the body of the nozzle unit maximizes spray power and quiets turbulence. The spray tip angle is preset relative to the body of the nozzle unit and an indicator groove on the body permits exact alignment of each spray tip during assembly on a header. Deep burying of the nozzle unit in the header eliminates plugging of the nozzle entrance passage at start-up and protects the nozzle from external collision damage.
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Citations
7 Claims
- 1. A descaling nozzle comprising a threaded body for placement in a threaded opening of a pressurized fluid header, the screw-threads of said body being near the forward end of the body and the body being elongated and extending substantially rearwardly of the screw-threads, whereby the body can extend deeply into the interior of a header, the body having a rear forwardly tapering venturi entrance passage for fluid, a restricted throat forwardly of the entrance passage and an enlarged forward threaded recess forwardly of said throat, the body having a permanent indicator element on the exterior thereof near its forward end to facilitate precise angular alignment of the nozzle orifice when the descaling nozzle is assembled with a header, a nozzle tip unit disposed within said threaded recess of said body and including a nozzle tip having a spray orifice, precision angle locator means for said orifice on said body and nozzle tip unit, and a threaded retaining sleeve for the nozzle tip unit engaged in said threaded recess of the body and having a through bore receiving said tip unit, and said tip unit including an enlarged head within the threaded recess and inwardly of the threaded retaining sleeve and being clamped between the rear end of the retaining sleeve and the opposing end wall of the threaded recess.
Specification