WO2007134389A1 - Secure nozzle insert assembly - Google Patents

Secure nozzle insert assembly Download PDF

Info

Publication number
WO2007134389A1
WO2007134389A1 PCT/AU2007/000695 AU2007000695W WO2007134389A1 WO 2007134389 A1 WO2007134389 A1 WO 2007134389A1 AU 2007000695 W AU2007000695 W AU 2007000695W WO 2007134389 A1 WO2007134389 A1 WO 2007134389A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
insert
counterbore
towards
deformation
Prior art date
Application number
PCT/AU2007/000695
Other languages
French (fr)
Inventor
Stuart Morgan
Sean Morgan
Original Assignee
Spray Nozzle Engineering Pty. Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2006902696A external-priority patent/AU2006902696A0/en
Application filed by Spray Nozzle Engineering Pty. Limited filed Critical Spray Nozzle Engineering Pty. Limited
Priority to US12/301,237 priority Critical patent/US20090266922A1/en
Priority to NZ573201A priority patent/NZ573201A/en
Priority to AU2007252300A priority patent/AU2007252300A1/en
Priority to EP07718941.3A priority patent/EP2018223B1/en
Publication of WO2007134389A1 publication Critical patent/WO2007134389A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/18—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for improving resistance to wear, e.g. inserts or coatings; for indicating wear; for handling or replacing worn parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads

Definitions

  • This invention relates to a nozzle which contains inserts and particularly to a spray nozzle for use in applications where extreme temperatures are met by the nozzle or where fragile components must be retained without damage.
  • Nozzles of the type to which this specification will refer are a commodity item used in very large numbers and can be threaded directly into pipe, or to attachments to which pipes are connected to provide a spray and in a conventional application there can be a substantial number of these nozzles along a particular length of pipe-work.
  • the nozzles themselves can vary from nozzles which are very small, having an overall body diameter of the order of 1 centimetre up to nozzles which are substantially larger than this.
  • the nozzles may be turned from a metallic rod, normally brass but possibly stainless steel, or are cast and later milled.
  • the line end of the nozzle is counter-bored and receives an insert which can, for example, impart a rotatory motion to the fluid as it passes into the nozzle and a variety of other types of patterns such as solid jet, needle jet or flat fan.
  • inserts may be cast or machined and are normally a frictiona! fit within the nozzles.
  • Such nozzles are quite satisfactory in general use however there are situations where the conventional nozzles are less than satisfactory and one of these is where the nozzles are used to spray very hot materials.
  • the nozzles may be used to spray a liquid onto a metal rod or sheet before rolling where the metal is "red hot".
  • the Hp of the end of the counter-bore is shaped during manufacture to be tapering towards the end of the lip and a die or the like is used to form the lip so as to retain the insert whilst at the same time ideally providing no specific intrusion which could adversely affect fluid flow in the line.
  • a die or the like is used to form the lip so as to retain the insert whilst at the same time ideally providing no specific intrusion which could adversely affect fluid flow in the line.
  • the crimping does cause some degree of turbulence in the flow into the back of the nozzle.
  • the invention in one aspect is a metallic spray nozzle having a cou ⁇ terbore from one side thereof into which an insert to control the spray is located and retained by means of deformation of the outer periphery of the counterbore.
  • This deformation can in one embodiment of the invention be towards an axis of the nozzle.
  • this deformation can be firstly towards an axis of the nozzle and subsequently outwards at its extremity such that flow into the counterbore is smooth.
  • the invention in a second aspect is a metallic spray nozzle having a counterbore from one side thereof into which a Ruby or ceramic or other such insert is located and retained by means of deformation of the outer periphery of the counterbore towards an axis of the nozzle having an O ring or other sealing membrane between a locating shoulder in the nozzle body and the inside edge of the insert.
  • the invention in a third aspect is an insert shield which is an annular shape with a central aperture and extends in a tapering fashion from within the outer periphery of the nozzle towards the aperture.
  • Fig. 1 Is a cross-sectional view of the nozzle after peening
  • Fig. 2 Shows a schematic view of the formation of an inwardly directed crimp
  • Fig. 3 Shows a schematic view of the formation of a retaining lip having an outwardly directed upper edge
  • Fig. 4 Shows a perspective view of an insert shield
  • Fig. 5 Shows a diagrammatic cross-section through an assembled nozzle with sealing means, insert, insert shield and retaining lip;
  • the nozzle of the invention 10 is basically be considered conventional and is shown in Figure 1 It can be either machined from a metallic rod or cast and machined and is generally cylindrical having part way along its outer length lands 11 or the like which provide a hexagonal shape to permit the nozzle to be rotated by a spanner or the like.
  • the nozzle is closed with an aperture 15 therethrough forming the actual orifice of the nozzle while the other end 13 is open by the formation of a counter-bore thereinto and is threaded 14 on its outer surface.
  • the nozzle of the invention differs from conventional nozzles only in that there is a tapered portion 20 at the outer end of the thread, which can be peened or otherwise deformed towards the counterbore axis.
  • This tapered portion can be formed after the thread has been cut and, possibly, in the same operation as the thread cutting operation.
  • the insert is a ceramic, ruby or other such insert having a central aperture these inserts also are retained by the rolled lip procedure described earlier.
  • Such an insert requires a very good seal to be achieved as higher pressures are involved and there is a greater opportunity for liquid streams to find a passage between the insert and the body and to intersect the primary liquid jet thereby severely disturbing it.
  • an O ring 50 or other sealing membrane is located between a shoulder 55 in the nozzle body and an inner face 24 of the insert. While this provides the effective seal required there is the added advantage that the crimping pressure required to create a seal is reduced as the compression on the rubber O ring enhances the seal.
  • a further advantage is that the insert is cushioned by the O ring during the crimping process and is therefore less likely to be damaged.
  • This insert shield 60 is a circular component with a central aperture 65 which is located inside the peened periphery of the nozzle and tapers in thickness from its periphery 61 towards its central aperture and the nozzle orifice 15. This tapering effect further stabilizes the spray by allowing liquid not entering the nozzle orifice to smoothly exit the orifice area by following the taper out rather than exiting across the insert face, hitting the crimp and causing turbulence.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Abstract

The invention is a metallic spray nozzle having a counterbore from one side thereof into which an insert to control the spray is located and retained by means of a retaining lip formed by deformation of the outer periphery of the counterbore. This deformation can be towards an axis of the nozzle or alternatively this deformation can subsequently direct the tip of the periphery outwards at its extremity such that flow into the counterbore is smooth. Also provided are an O ring or other sealing membrane between a locating shoulder in the nozzle body and the insert and an insert shield between the insert and the retaining lip.

Description

SECURE NOZZLE INSERT ASSEMBLY
Area of the Invention
This invention relates to a nozzle which contains inserts and particularly to a spray nozzle for use in applications where extreme temperatures are met by the nozzle or where fragile components must be retained without damage.
Background to the Invention
Nozzles of the type to which this specification will refer are a commodity item used in very large numbers and can be threaded directly into pipe, or to attachments to which pipes are connected to provide a spray and in a conventional application there can be a substantial number of these nozzles along a particular length of pipe-work.
The nozzles themselves can vary from nozzles which are very small, having an overall body diameter of the order of 1 centimetre up to nozzles which are substantially larger than this.
In practice the nozzles may be turned from a metallic rod, normally brass but possibly stainless steel, or are cast and later milled. In order to ensure good distribution and spray pattern from the nozzle it is quite usual that the line end of the nozzle is counter-bored and receives an insert which can, for example, impart a rotatory motion to the fluid as it passes into the nozzle and a variety of other types of patterns such as solid jet, needle jet or flat fan.
These inserts may be cast or machined and are normally a frictiona! fit within the nozzles. Such nozzles are quite satisfactory in general use however there are situations where the conventional nozzles are less than satisfactory and one of these is where the nozzles are used to spray very hot materials. In one such application the nozzles may be used to spray a liquid onto a metal rod or sheet before rolling where the metal is "red hot".
For the liquid to reach the surface of the metal it is necessary that the nozzles be located very close to the surface and in practice it has been found that the expansion of the nozzle tends to be differential so that the inserts are no longer held within the nozzles but are in effect basically free floating.
If there then happens to be any form of reverse pressure, either because of a fluctuation in the fluid line pressure or possibly even through evaporation of liquid in the nozzles, or should there be any physical movement as by vibration or hammer in the pipes, then the insert can leave the nozzle and pass into the line.
If this occurs then there can be a partial blockage of the line or of a particular other nozzle, if the insert stops in the line, and in order to correct this the spraying operation has to be stopped, the insert has to found and removed and, of course, the faulty nozzle has to be replaced. Where the system is being used in a time critical situation, such as with a steel rolling mill, this can be extremely expensive as the line may have to be stopped for repair.
It has been known to provide a retaining means for an insert in a nozzle by at least partially peening over the end of the counter-bore to prevent movement of the insert.
In that particular type of nozzle the Hp of the end of the counter-bore is shaped during manufacture to be tapering towards the end of the lip and a die or the like is used to form the lip so as to retain the insert whilst at the same time ideally providing no specific intrusion which could adversely affect fluid flow in the line. In practice however it has been found that the crimping does cause some degree of turbulence in the flow into the back of the nozzle.
A further problem with the the inserts as retained in this manner is that they are subject to high pressure leakage. In addition they can be damaged during the crimping process, this is particularly so for Ruby or ceramic inserts as used in high pressure washing, trimming and cutting applications of thetype typicallyfound in paper mills and other such industries.
An additional problem that relates to ruby and ceramic inserts is that in brush showers, and the like, where the internal longitudinal rotating brush cleans the nozzle nipple that protrudes into the pipe, damage can be caused to the inserts. This is because such edges are more fragile in shear and can be chipped or damaged by the brush bristles.
Outline of the Invention
It is an object of the invention to provide a nozzle having an insert which is retained by crimping as described above but having smoother flow into the back of the nozzle when compared with previous such nozzles.
It is a further object of the invention to provide such a nozzle which is sealed so as to prevent high pressure leakage without the use of glues and the like. It is also an object of the invention to provide a means for protecting that part of the insert, where it is ruby or ceramic, from damage by cleaning brush bristles.
The invention in one aspect is a metallic spray nozzle having a couήterbore from one side thereof into which an insert to control the spray is located and retained by means of deformation of the outer periphery of the counterbore. This deformation can in one embodiment of the invention be towards an axis of the nozzle.
In a further embodiment of the invention this deformation can be firstly towards an axis of the nozzle and subsequently outwards at its extremity such that flow into the counterbore is smooth.
The invention in a second aspect is a metallic spray nozzle having a counterbore from one side thereof into which a Ruby or ceramic or other such insert is located and retained by means of deformation of the outer periphery of the counterbore towards an axis of the nozzle having an O ring or other sealing membrane between a locating shoulder in the nozzle body and the inside edge of the insert.
The invention in a third aspect is an insert shield which is an annular shape with a central aperture and extends in a tapering fashion from within the outer periphery of the nozzle towards the aperture.
In order that the invention may be more readily understood we shall describe by way of non limiting example embodiments of the nozzle made in accordance with the invention as shown in the drawing figures.
Brief Description of the Drawing Figures
Fig. 1 Is a cross-sectional view of the nozzle after peening;
Fig. 2 Shows a schematic view of the formation of an inwardly directed crimp;
Fig. 3 Shows a schematic view of the formation of a retaining lip having an outwardly directed upper edge; Fig. 4 Shows a perspective view of an insert shield;
Fig. 5 Shows a diagrammatic cross-section through an assembled nozzle with sealing means, insert, insert shield and retaining lip;
Description of Embodiments of the invention
The nozzle of the invention 10 is basically be considered conventional and is shown in Figure 1 It can be either machined from a metallic rod or cast and machined and is generally cylindrical having part way along its outer length lands 11 or the like which provide a hexagonal shape to permit the nozzle to be rotated by a spanner or the like.
At one end 12 the nozzle is closed with an aperture 15 therethrough forming the actual orifice of the nozzle while the other end 13 is open by the formation of a counter-bore thereinto and is threaded 14 on its outer surface.
The nozzle of the invention differs from conventional nozzles only in that there is a tapered portion 20 at the outer end of the thread, which can be peened or otherwise deformed towards the counterbore axis. This tapered portion can be formed after the thread has been cut and, possibly, in the same operation as the thread cutting operation.
When the nozzle is assembled and an insert is located therein and the outer edge of the insert 21 terminates adjacent the inner part of the tapered portion 25. An annular die 30 in a press can then be moved down over the tapered portion and cause an inward deformation or crimping of the outer edge 26 of the nozzle 10 which provides a retaining lip which acts as a barrier to prevent the insert from leaving the nozzle. A flaring tool 40 can then be inserted into the counterbore to deform the outermost edge outwards to create a flared crimp 45 as shown in Figure 3 so that the fluid entering the nozzle passes a smooth curved edge when it passes the retaining lip which does not contribute to turbulence of the fluid in this area.
Where the insert is a ceramic, ruby or other such insert having a central aperture these inserts also are retained by the rolled lip procedure described earlier. Such an insert requires a very good seal to be achieved as higher pressures are involved and there is a greater opportunity for liquid streams to find a passage between the insert and the body and to intersect the primary liquid jet thereby severely disturbing it.
In order to provide such a seal, as shown in Figure 4 an O ring 50 or other sealing membrane is located between a shoulder 55 in the nozzle body and an inner face 24 of the insert. While this provides the effective seal required there is the added advantage that the crimping pressure required to create a seal is reduced as the compression on the rubber O ring enhances the seal.
A further advantage is that the insert is cushioned by the O ring during the crimping process and is therefore less likely to be damaged.
As previously stated however ruby and ceramic inserts are vulnerable to damage caused by the bristles of cleaning brushes.
This problem is addressed in the invention by providing an insert shield 60 as shown in Figure 4 which generally covers the ruby or ceramic surface 27 and is located within the peened periphery.
This insert shield 60 is a circular component with a central aperture 65 which is located inside the peened periphery of the nozzle and tapers in thickness from its periphery 61 towards its central aperture and the nozzle orifice 15. This tapering effect further stabilizes the spray by allowing liquid not entering the nozzle orifice to smoothly exit the orifice area by following the taper out rather than exiting across the insert face, hitting the crimp and causing turbulence.
By the means described above significant improvements are provided in prior rolled lip insert retaining type nozzles and whilst we have described herein specific embodiments of the invention it is envisaged that other embodiments of the invention will exhibit any number of and any combination of the features previously described and it is to be understood that variations and modifications in this can be made without departing from the spirit and scope of the invention.

Claims

The claims defining the invention are as follows:
1. A metallic spray nozzle having a counterbore from one side thereof into which an insert to control the spray is located and retained by means of a retaining lip formed by deformation of an outer periphery of the counterbore towards an axis of the nozzle, said insert having a central aperture between an inner and outer face thereof.
2. A metallic spray nozzle as claimed in claim 1 having a counterbore from one side thereof into which the insert to control the spray is located and retained by means of a retaining lip formed by deformation of the outer periphery of the counterbore firstly towards an axis of the nozzle and subsequently- outwards such that flow into the counterbore is smooth.
3. A metallic spray nozzle as claimed in cfaim 1 or claim 2 having sealing means between a locating shoulder in the nozzle body and the inner face of the insert.
4. A metallic spray nozzle as claimed in claim 3 in which the sealing means is an O ring.
5. A metallic spray nozzle as claimed in any one of claims 1 to 4 wherein an insert shield having a central aperture is located between the outer surface of the insert and the retaining lip and extends from an inner periphery of the nozzle towards its central aperture.
6. A metallic spray nozzle as claimed in claim 5 wherein the insert shield has an annular shape and extends in a tapering fashion from the inner periphery of the nozzle towards the nozzle aperture. A metallic spray nozzle as claimed in claim 6 wherein the insert shield is a ruby insert shield.
PCT/AU2007/000695 2006-05-19 2007-05-21 Secure nozzle insert assembly WO2007134389A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/301,237 US20090266922A1 (en) 2006-05-19 2007-05-21 Secure nozzle insert assembly
NZ573201A NZ573201A (en) 2006-05-19 2007-05-21 Metallic spray nozzel with a shield retained by the deformation of an outer periphery of a counterbore
AU2007252300A AU2007252300A1 (en) 2006-05-19 2007-05-21 Secure nozzle insert assembly
EP07718941.3A EP2018223B1 (en) 2006-05-19 2007-05-21 Secure nozzle insert assembly

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU2006902696A AU2006902696A0 (en) 2006-05-19 Improved nozzle
AU2006902696 2006-05-19
AU2006904114A AU2006904114A0 (en) 2006-07-31 Further improved nozzle
AU2006904114 2006-07-31

Publications (1)

Publication Number Publication Date
WO2007134389A1 true WO2007134389A1 (en) 2007-11-29

Family

ID=38722865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2007/000695 WO2007134389A1 (en) 2006-05-19 2007-05-21 Secure nozzle insert assembly

Country Status (5)

Country Link
US (1) US20090266922A1 (en)
EP (1) EP2018223B1 (en)
AU (1) AU2007252300A1 (en)
NZ (1) NZ573201A (en)
WO (1) WO2007134389A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH710852A1 (en) * 2015-03-14 2016-09-15 Campana Urs Nozzle.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090202955A1 (en) * 2008-02-07 2009-08-13 General Electric Company Gasification feed injectors and methods of modifying the cast surfaces thereof
US10155233B2 (en) * 2008-04-09 2018-12-18 Carlisle Fluid Technologies, Inc. Splash plate retention method and apparatus

Citations (7)

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Publication number Priority date Publication date Assignee Title
GB1152163A (en) * 1967-04-17 1969-05-14 Inst Chemieanlagen Spray Nozzle
US4349947A (en) 1980-09-29 1982-09-21 Nordson Corporation Method for manufacturing an airless spray nozzle
JPH0872951A (en) * 1994-09-07 1996-03-19 Seiichi Kitabayashi Device for fixing deadweight moored to liquid supply pipe of pushing container, mooring projection of the deadweight, method for mooring the deadweight to the liquid supply pipe, and pushing container having liquid supply pipe with deadweight
AU698298B2 (en) * 1994-12-29 1998-10-29 Spray Nozzle Engineering Pty. Limited Nozzle
GB2328386A (en) * 1995-03-03 1999-02-24 Spraying Systems Co Nozzle with quick disconnect spray tip
EP1323479A1 (en) 2001-12-20 2003-07-02 ALTO Deutschland GmbH Two-piece high pressure nozzle
US20030234301A1 (en) * 2002-06-20 2003-12-25 Hypro Corporation Nozzle tip for agricultural sprayers

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US3705693A (en) * 1971-07-16 1972-12-12 Norman Franz Means for sealing fittings and nozzle assemblies at extremely high fluid pressures
DE3000061C2 (en) * 1980-01-03 1993-10-14 Bosch Gmbh Robert Fuel injection nozzle for internal combustion engines
US5421522A (en) * 1993-09-24 1995-06-06 Bex Engineering Ltd. Nozzle assembly
US5934569A (en) * 1997-09-03 1999-08-10 Bete Fog Nozzle, Inc. Fluid nozzle having a swirl unit and orifice plate, and means for facilitating assembly thereof
DE19849814A1 (en) * 1998-10-29 2000-05-04 Saechsische Werkzeug Und Sonde Nozzle to form jet of water in water jet cutting heads has wear-resistant nozzle inserts fitted one behind other in point of body's central bore and forming nozzle segments of different shapes which form jet pipe
US7163159B2 (en) * 2003-07-15 2007-01-16 Siemens Vdo Automotive Corporation Fuel injector including a compound angle orifice disc
US7185833B2 (en) * 2004-03-18 2007-03-06 Ernest Geskin Method for fluid jet formation and apparatus for the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152163A (en) * 1967-04-17 1969-05-14 Inst Chemieanlagen Spray Nozzle
US4349947A (en) 1980-09-29 1982-09-21 Nordson Corporation Method for manufacturing an airless spray nozzle
JPH0872951A (en) * 1994-09-07 1996-03-19 Seiichi Kitabayashi Device for fixing deadweight moored to liquid supply pipe of pushing container, mooring projection of the deadweight, method for mooring the deadweight to the liquid supply pipe, and pushing container having liquid supply pipe with deadweight
AU698298B2 (en) * 1994-12-29 1998-10-29 Spray Nozzle Engineering Pty. Limited Nozzle
GB2328386A (en) * 1995-03-03 1999-02-24 Spraying Systems Co Nozzle with quick disconnect spray tip
EP1323479A1 (en) 2001-12-20 2003-07-02 ALTO Deutschland GmbH Two-piece high pressure nozzle
US20030234301A1 (en) * 2002-06-20 2003-12-25 Hypro Corporation Nozzle tip for agricultural sprayers

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Title
BEX INC.: "Bex Announces New Paper - Trimming Nozzle", PRESS RELEASE, 5 April 2006 (2006-04-05), XP008090722, Retrieved from the Internet <URL:http://www.news.thomasnet.com/fullstory/481874/988> *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH710852A1 (en) * 2015-03-14 2016-09-15 Campana Urs Nozzle.
EP3069793A1 (en) * 2015-03-14 2016-09-21 Urs Campana Jet

Also Published As

Publication number Publication date
US20090266922A1 (en) 2009-10-29
EP2018223A1 (en) 2009-01-28
AU2007252300A1 (en) 2007-11-29
NZ573201A (en) 2012-07-27
EP2018223A4 (en) 2017-05-17
EP2018223B1 (en) 2018-11-07

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