WO1995017926A1 - Busette - Google Patents

Busette Download PDF

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Publication number
WO1995017926A1
WO1995017926A1 PCT/NO1994/000214 NO9400214W WO9517926A1 WO 1995017926 A1 WO1995017926 A1 WO 1995017926A1 NO 9400214 W NO9400214 W NO 9400214W WO 9517926 A1 WO9517926 A1 WO 9517926A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
engagement
cylinder
relation
piston
Prior art date
Application number
PCT/NO1994/000214
Other languages
English (en)
Inventor
David A. Hill
Original Assignee
Norfass A.S
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 NO934912A external-priority patent/NO934912D0/no
Application filed by Norfass A.S filed Critical Norfass A.S
Priority to AU14275/95A priority Critical patent/AU1427595A/en
Priority to EP95905800A priority patent/EP0781157A1/fr
Publication of WO1995017926A1 publication Critical patent/WO1995017926A1/fr

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/02Nozzles specially adapted for fire-extinguishing
    • A62C31/03Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa

Definitions

  • the present invention relates to a nozzle, preferably for extinguishing fire with water, more particularly a nozzle that can be adjusted from a position for emitting a jet stream to a position for emitting water fog, and that automatically returns to the fog position upon loss of water pressure or If the person operating the hose loses his grip on the nozzle.
  • a nozzle for extinguishing fire may be either a fixedly secured "water cannon" or a mouthpiece on a manually operated hose.
  • Such nozzles are usually adjustable between a jet stream position and a fog position, depending upon the requirements of a given situation.
  • traditional nozzles Upon loss of water pressure, traditional nozzles will remain in their position unless a deliberate readjustment is made. When the pressure subsequently is turned on again and the nozzle is in the jet position, very dangerous situations may arise.
  • the water cannon might be left in its jet position, a situation which would not be discovered until the next time the water cannon is used.
  • the operator has very few, if any, possibilities of checking the position of the water cannon before he actually observes the characteristics of the stream.
  • Nozzles which can be adjusted from fog to a jet stream position are well known in many variants, for example as shown in US patents 2,991,016 and 3,784,113.
  • a nozzle for automatic return to fog position is previously known.
  • This nozzle which is produced by Haisley Firetech Limited, has a cylinder disposed across the inner body of the nozzle and provided with a piston pressing a ball into engagement with a helical groove on the outer body of the nozzle.
  • This nozzle has the following disadvantages: it has only one ball engaging with the helical groove; the direct pressure on the ball by the piston provides insufficient force for reliable locking; the geometrical relations make unwanted locking possible even when the pressure is removed; and the cylinder occupies a substantial part of the interior cross section of the nozzle, thereby disturbing the flow patterns of the nozzle and reducing its capacity. It has also been shown in practice that this nozzle does not ensure reliable operation.
  • An object of the present invention is thus to provide a nozzle, preferably for fire extinguishing purposes, which can be adjusted between a jet stream and a fog position, and which upon loss of water pressure automatically assumes the fog position, at the same time as the disadvantages of the known nozzle are avoided.
  • a nozzle preferably for the purpose of extinguishing fire, comprising an inner and an outer tubular body which can be rotated and longitudinally displaced in relation to each other, where one of the bodies has one or more helical grooves for engagement with corresponding engagement members on the other body, and where the nozzle is adapted to be adjusted between a jet stream position and a fog position in that the inner and the outer body are rotated in relation to each other and are thereby displaced in the longitudinal direction in relation to each other by the engagement between the helical groove and the engagement member, the nozzle being characterized in that two or more engagement members are adapted to be pressed into engagement with one of more helical grooves when fluid is discharged through the nozzle and to be disengaged when the fluid pressure in the nozzle falls below a predetermined level.
  • another object of the present invention is to provide a fire extinguishing nozzle which, in addition to automatically assuming fog position upon loss of water pressure, also automatically assumes this position when the person guiding the hose loses his grip on the nozzle.
  • a nozzle of the above described type wherein, in addition, a release bolt having a narrowed-down portion is mounted in the flow path between the opening and the cylinder, so that the release bolt can be manually moved between two positions, one position in which a connection between the cylinder and the flow of fluid in the nozzle through the opening to the cylinder is established by means of the narrowed-down portion, the release bolt simultaneously closing off the drain aperture, and another position in which the release bolt prevents connection between the cylinder and the flow of fluid, leaving the drain aperture open.
  • Figure 1 shows a longitudinal section through a water nozzle according to the present invention, in a jet stream position.
  • Figure 2 shows a longitudinal section of the same nozzle in fog position.
  • Figure 3 shows a longitudinal section of another embodiment of the nozzle in which the nozzle is provided with a release handle shown in the pressed-in position.
  • Figure 4 shows a section of the device connected with the release handle, shown in the released position.
  • Figure 5 shows a longitudinal section of another nozzle according to the invention, in a jet stream position.
  • Figure 6 shows a longitudinal section of the same embodiment as Figure 5, in fog position.
  • the nozzles of the embodiments in all the drawings consist in principle of an outer 3 and an inner 2 approximately tubular body which are rotatable in relation to each other and can be longitudinally displaced in relation to each other.
  • the outer and the inner body 2,3 are rotated in relation to each other at the same time as the engagement members 15 of one of said bodies 2, 3 engage with helical groove(s) 19 on the other of bodies 2, 3, the bodies 2, 3 will then be displaced in relation to each other in the longitudinal direction according to essentially the same principle as used in known nozzles, for example nozzles for fire ex ⁇ tinguishing purposes.
  • the water enters in a known manner through the inlet 18 in the inlet base 1 from a water conduit system not shown.
  • the inner cavity of the nozzle forms, as in known nozzles, a natural extension of the water conduit system through the inlet 18.
  • the water then flows out of the nozzle between the deflector 6 and the throat 4.
  • the stream of water is either directed outward to the sprayer 31 on the spray ring 5 as shown in Figures 2 and 6 to produce fog, or held together by the straight sides of the interior surface of spray ring 5 and/or the outer body 3 as shown in Figures 1 and 5.
  • the novelty of the present nozzle as shown in the drawings is that the engagement between the engagement member 15 and the helical groove 19 is terminated upon loss of fluid pressure from the conduit system, and that the inner and the outer body 2, 3 after being disengaged are moved by the return spring 16 to those positions, relative to each other, that produce fog.
  • the engagement member 15 consists of two or more balls which are positioned in ball ports 21 in the wall of either the outer or the inner body
  • the cut 22 forms an inclined plane which presses the ball 15 partly out of the ball port 21 when the piston 7 is moved forward by the fluid pressure in the nozzle through the opening 20, so that the ball is pressed against the wall of the other body 2,3 and engages with the helical groove 19 on the other body 2,3 when the bodies are rotated in relation to each other.
  • the axes of the piston 7 and the cylinder 23 are approximately parallel to the longitudinal axis of the nozzle.
  • the piston 7 is annular and is positioned in an annular cylinder 23 in the outer body 3.
  • the outer body can consist of one part in which the cylinder 23 for instance is cast or turned, or it can be composed of two parts screwed together as shown in Figures 1-2, so that the annular cylinder is formed between these two parts which are screwed together.
  • each ball 15 In its own ball port 21 in the interior wall of the outer body 3.
  • These balls 15 are preferably positioned in the same plane, as shown in the drawings, but they can also be displaced in relation to each other in the longitudi ⁇ nal direction of the nozzle. If the balls 15, as shown here, lie in the same plane, each ball is adapted for engagement with a helical groove 19 of its own, whereas two or more balls can be adapted for engagement with the same helical groove 19 if the balls are longitudinally displaced in relation to each other.
  • a control pin or pins 28 are fixedly secured to the inlet base 1, engage with the control groove 27 on the inner body 2 of the valve and prevent the inner body 2 from rotating in relation to the inlet base, but allow these to be displaced in relation to each other.
  • the outer body 3 can be rotated in relation to the inlet base 1 and is prevented from being displaced in the longitudinal direction in relation to said base by a stop ring 42 secured to the inlet base 1, where a ball bearing 41 ensures that the outer body 3 can be easily rotated in relation to the inlet base.
  • the balls 15 When the outer body is rotated in relation to the inlet base without there being a fluid pressure in the nozzle, the balls 15 will rest in the ball ports 21 and the inner 2 and the outer 3 body will only rotate freely in relation to each other without a displacement in the longitudinal direction of the nozzle.
  • the inner body 2 will then be pressed forward in the nozzle by the return spring 16 until it enters the position that provides fog.
  • the inner body 2 is prevented from moving further forward than to the fog position by bumping against the back edge of the spray ring 5 which is secured to the outer body 3. This can naturally be achieved also by other means, for example by a separate stop ring.
  • the balls 15 When the water pressure is directed into the nozzle through the opening 20, the balls 15 are pressed into engagement with the helical groove(s) 19 as described above.
  • the balls 15 By turning the outer body 3 in relation to the inlet base, the balls 15 will engage with the helical groove(s) 19, and a turn will cause the inner 2 and the outer 3 body to be displaced in relation to each other in the longitudinal direction so as to achieve, in this manner, the adjustment of the stream as described above.
  • the position providing a jet stream is obtained by pulling the inner body 2 backward in the nozzle, as shown in Figure 2.
  • Loss of water pressure may occur by intentional or uninten- tional shutting-off of water, but the fact that the nozzle returns to fog position prevents the unintentional occurrence of a hazardous jet stream when the water pressure returns.
  • the deflector support 9 is mounted on the throat 4 which is secured to the inner body 2.
  • the deflector 9 is secured to the stem 8 by any method, for example by their being screwed together.
  • the distance marker 11 can be one or more rings or can be represented by a thicker portion of the stem
  • the length of the distance marker determines the distance between the deflector 6 and the throat 4 and thereby the capacity and stream characteristics of the nozzle.
  • the inner body 2 of the nozzle, the deflector support 9 and the throat 4 can of course be cast in one unit, but it is preferable to machine these parts separately and put them together as shown in the preferred embodiment. This makes possible adjustments and adaptations of the nozzle, which are impossible with ready cast pieces.
  • the spray ring 5 is secured to the outer body of the nozzle.
  • This outer body surrounds the inner body and can freely rotate and also be displaced in the longitudinal direction in relation to the inner body. O-rings 14 and a seal 25 prevent or minimize undesirable leakage in the nozzle. Spray ring 5 also prevents the inner body 2 from sliding out of the outer body 3.
  • a drain valve 32 having a valve ball 33 and a valve spring 34 contributes to a rapid fall in the pressure against piston 7 when the water pressure is removed.
  • This drain valve is not necessary, but preferred. Particularly when a valve is mounted out of doors in an environment having variable temperature including frequent frost, it is desirable or even necessary that the valve and especially the cylinder 23 and the opening thereto, is completely emptied for water after use.
  • Motor control for regulating the stream may advantageously be installed in this embodiment.
  • a motor (not shown) can then be used to rotate the outer body 3 in relation to the inlet base 1.
  • Such an installation will be very simple since the outer ring moves only in a circular motion and not in the longitudinal direction.
  • Such a motorized control may advantageously be supplied by an electric or hydraulic motor or actuator mounted on the inlet base 1 or in a location which remains rigid in relation thereto, and where a toothed wheel of the motor/actuator drives a toothed ring on the outer body 3. If the nozzle is to be manually controlled, it will be desirable that a handle be mounted on the outer body 3 in order to facilitate rotation.
  • Example 2 The embodiment of this example is shown in Figures 3 and 4, which show a special adaptation of the present nozzle for use on hand-held hoses.
  • the nozzle is here provided with a release device comprising a release handle 35 having a release lever 36, a release bolt 37 with a return spring 39, and a narrowed-down portion 40, said release device being positioned in the release cylinder 41.
  • the release bolt 37 shuts off the water flow through opening 20 into the cylinder 23.
  • this embodiment is suitable for hand-held hoses.
  • a hose having such a nozzle will be less dangerous than a traditional nozzle by being in a fog position when the water pressure returns after a loss thereof, ensuring that the hose is not knocked out of the hands of the person holding it, and by being automatically returned to the least dangerous position, the fog position, when the hose is lost or is out of control.
  • a handle or grip ring is mounted on the outer body 3.
  • Example 3 Figures 5 and 6 show another embodiment which differs from those described above in Examples 1 and 2 primarily in that the inlet base 1 is fixedly mounted on the inner body 2 of the nozzle, and in that each of the balls 15 is installed in its own cylinder-shaped piston 7 which has a cut-out portion and is positioned in the inner portion 2 of the nozzle.
  • This solution Includes at least two pistons 7 in their individual cylinders 23, each piston having its own piston spring.
  • This solution entails that the outer body 3 both can be rotated and move axially in relation to the inner body 2 and the inlet base 1.
  • the deflector 6, which together with the throat 4 defines the discharge orifice of the water, is mounted on the deflector support 9.
  • the deflector support 9 is held in place by the throat 4 which is screwed into the inner body 2.
  • the deflector 9 is fixedly secured to the stem 8, which runs through the deflector support, and the deflector is secured to the stem 8 by deflector screw nuts 10.
  • the distance marker 11 may be composed of one or more rings that can be positioned either as shown in the drawings or between the deflector 6 and the deflector support 9. In this manner the stream characteristics of the nozzle can be adapted to requirements and water pressure.
  • the inlet base 1, the inner body 2, the deflector support 9 and the throat 4 can obviously be molded in a unit, but it is preferred to machine these parts separately and assemble them as shown in the drawings.
  • This assembled unit, or the main part of the nozzle constitutes also in the preferred embodiment an assembled unit the parts of which are fixedly mounted in relation to each other, for example by being screwed together as suggested in the drawings.
  • the outer body of the nozzle is composed of an adjustment ring 3, whereon a handle 13 on a handle support 12, and a spray ring are mounted.
  • the outer body surrounds the inner body 2 and can freely be rotated and also displaced in the longitudinal direction in relation to the other body 2.
  • the O-rings 14 and the seal 25 prevent or minimize undesirable leakage In the nozzle.
  • the return spring 16 presses the outer body 3 in the direction of the inlet base 1, or the position that provides fog. Without water pressure in the nozzle, a rotation of the outer body 3 will not lead to any longitudinal dis ⁇ placement of the outer and the inner body in relation to each other.
  • the return spring can be any type of elastic member, but it is preferred to use a helical spring as shown in the drawings, or a helical wave spring.
  • the piston 7 Upon loss of water pressure, the piston 7 is pressed back by the moment which, in conjunction with the piston spring 17, presses the ball 15 against the conical surface 22, so that the ball 15 falls back into the cut in the piston, and out of its engagement with the outer body 3.
  • the outer body 3 will therefore be pressed by the return spring 16 back in the direction of the inlet base 1, and the nozzle returns to the fog position. It is preferred that the ball 15 rests against the conical cut 22 in the piston 7 the whole time.
  • the cylindrical cavity 23 of the piston 7 is bored in the main body 2 and the axes of the cavity 23 and the piston 7 run approximately parallel to the longitudinal axis of the nozzle.
  • the opening 20 is preferably at that end of the cylindrical cavity 23 which is closest to the inlet base 1 and thus the inlet to the nozzle.
  • the water pressure will therefore create a pressure against the piston 7 and press it forward in the longitudinal direction of the nozzle, whereby the ball is pressed out of the conical cut 22 through the ball port 21 and into engagement with the helical groove 19.
  • the nozzle can be operated either by manual rotation of the handle 13 or by a toothed wheel of a (not shown) regulation motor engaging with the toothed wheel of the adjustment ring 13.
  • the section depicted in Figures 5 and 6 shows a piston 7 and a ball 15, but it is preferred that there would be dis ⁇ tributed two or more such pistons 7, mounted in cylinders 23 in the inner body 2 at approximately equal intervals around the circumference of the inner body 2.
  • two or more pistons 7 reliable operation of the nozzle is ensured even at a failure of one of the piston/ball assemblies, and no oblique load will occur in the nozzle. It has proved preferable to use 2 to 7 piston/ball assemblies, depending upon the size of the nozzle. More pistons will increase the complexity and production cost of the nozzle.
  • a particular- ly preferred compromise between cost and reliable operation is a nozzle having three piston/ball assemblies spaced at equal intervals around the circumference of the inner body 2.
  • a coating which reduces the friction between the parts and in addition prevents the formation of a surface layer that can cause a failure in the functioning of the nozzle.
  • a nickel-teflon coating preferably of the type Magnaplate from General Magnaplate Corp.
  • the nozzles shown are all intended for fire extinguishing purposes and are preferably used for water, water/foam mixtures or water having other additives, but the principle can naturally also be applied to other fluids and for other poroses.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)

Abstract

La présente invention concerne une busette destinée principalement à l'extinction des feux. Elle se compose de corps tubulaires interne (2) et externe (3) susceptibles de se mouvoir l'un par rapport à l'autre longitudinalement et par rotation. L'un des deux corps (2, 3) comporte une ou plusieurs rainures hélicoïdales (19) s'engageant sur une forme correspondante (15) placée sur l'autre corps (2, 3). La busette est conçue pour un réglage entre une position 'jet direct' et une position 'eau pulvérisée'. Pour cela, on fait tourner les corps interne (2) et externe (3) l'un par rapport à l'autre, ce qui les déplace longitudinalement l'un par rapport à l'autre en raison de l'engagement de la rainure hélicoïdale (19) sur la forme correspondante (15). Ce qui caractérise cette busette, c'est qu'une ou plusieurs formes (15) correspondant aux rainures sont conçues pour s'engager par pression dans une ou plusieurs rainures hélicoïdales (19) lorsque le fluide est pulvérisé par la busette et pour se dégager lorsque la pression dans la busette tombe au-dessous d'un seuil prédéfini.
PCT/NO1994/000214 1993-12-30 1994-12-28 Busette WO1995017926A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU14275/95A AU1427595A (en) 1993-12-30 1994-12-28 Nozzle
EP95905800A EP0781157A1 (fr) 1993-12-30 1994-12-28 Busette

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO934912 1993-12-30
NO934912A NO934912D0 (no) 1993-12-30 1993-12-30 Dyse
NO944576 1994-11-29
NO944576A NO944576L (no) 1993-12-30 1994-11-29 Dyse

Publications (1)

Publication Number Publication Date
WO1995017926A1 true WO1995017926A1 (fr) 1995-07-06

Family

ID=26648465

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1994/000214 WO1995017926A1 (fr) 1993-12-30 1994-12-28 Busette

Country Status (4)

Country Link
EP (1) EP0781157A1 (fr)
AU (1) AU1427595A (fr)
NO (1) NO944576L (fr)
WO (1) WO1995017926A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297930B (en) * 1995-02-20 1998-08-26 Sword Jet/spray nozzles
WO1999030828A1 (fr) * 1997-12-17 1999-06-24 Amhi Corporation Lance a jet brouillard automatique
FR2801799A1 (fr) * 1999-12-07 2001-06-08 Pok Soc Lance a incendie
WO2002049770A1 (fr) 2000-12-21 2002-06-27 Andrej Cufer Buse destinee notamment a la formation de brouillard
WO2014009048A1 (fr) * 2012-05-25 2014-01-16 Multishower Gb Limited Pomme de douche
EA022550B1 (ru) * 2011-10-28 2016-01-29 Государственное Учреждение Образования "Командно-Инженерный Институт" Министерства По Чрезвычайным Ситуациям Республики Беларусь Ствол пожарный ручной комбинированный

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO339862B1 (en) * 2015-11-11 2017-02-13 Fire Prot Engineering As Nozzle for a firewater monitor and a firewater monitor comprising such nozzle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561545A1 (fr) * 1984-03-26 1985-09-27 Dubois Ets Lance, notamment pour la lutte contre les incendies
DE3822160A1 (de) * 1988-06-30 1990-01-11 Total Feuerschutz Gmbh Verfahren und vorrichtung zum verstellen eines duesenkopfes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561545A1 (fr) * 1984-03-26 1985-09-27 Dubois Ets Lance, notamment pour la lutte contre les incendies
DE3822160A1 (de) * 1988-06-30 1990-01-11 Total Feuerschutz Gmbh Verfahren und vorrichtung zum verstellen eines duesenkopfes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297930B (en) * 1995-02-20 1998-08-26 Sword Jet/spray nozzles
WO1999030828A1 (fr) * 1997-12-17 1999-06-24 Amhi Corporation Lance a jet brouillard automatique
FR2801799A1 (fr) * 1999-12-07 2001-06-08 Pok Soc Lance a incendie
EP1106212A1 (fr) * 1999-12-07 2001-06-13 Pok Lance à incendie
US6598810B2 (en) 1999-12-07 2003-07-29 Pok Fire hose lance
WO2002049770A1 (fr) 2000-12-21 2002-06-27 Andrej Cufer Buse destinee notamment a la formation de brouillard
EA022550B1 (ru) * 2011-10-28 2016-01-29 Государственное Учреждение Образования "Командно-Инженерный Институт" Министерства По Чрезвычайным Ситуациям Республики Беларусь Ствол пожарный ручной комбинированный
WO2014009048A1 (fr) * 2012-05-25 2014-01-16 Multishower Gb Limited Pomme de douche
US20150151310A1 (en) * 2012-05-25 2015-06-04 Multishower Gb Ltd Spray head

Also Published As

Publication number Publication date
EP0781157A1 (fr) 1997-07-02
AU1427595A (en) 1995-07-17
NO944576L (no) 1995-07-03
NO944576D0 (no) 1994-11-29

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