GB2565228A - Improved fluid discharge nozzle - Google Patents
Improved fluid discharge nozzle Download PDFInfo
- Publication number
- GB2565228A GB2565228A GB1811216.9A GB201811216A GB2565228A GB 2565228 A GB2565228 A GB 2565228A GB 201811216 A GB201811216 A GB 201811216A GB 2565228 A GB2565228 A GB 2565228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nozzle
- fluid discharge
- fluid
- stem
- baffle head
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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Classifications
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- 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
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/3073—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a deflector acting as a valve in co-operation with the outlet orifice
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- 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
- B05B1/26—Nozzles, 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
- B05B1/262—Nozzles, 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
- B05B1/265—Nozzles, 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
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- 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
- B05B1/12—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
Abstract
A fluid discharge nozzle 1 comprises a discharge tube 2 forming a fluid conduit for carrying fluid towards a discharge end of the nozzle 3. There is a pattern sleeve 27 displaceable between a first position which is relatively retracted in the longitudinal direction of the nozzle and the second position which is relatively extended. There is a baffle head 12 which comprises, on its underside, an annular fluid deflection surface 21 which is flat and extends in a direction substantially perpendicular to the longitudinal axis of the discharge tube. The baffle head is positioned relative to the pattern sleeve whereby in the first position of the pattern sleeve the fluid discharge from the nozzle is in the form of a spray substantially perpendicular to the longitudinal axis of the discharge tube and in the second position the fluid discharge from the nozzle is primarily a jet in the longitudinal direction. The baffle head is attached to an elongate stem 10, which reduces in diameter along the direction of fluid flow. There may be a spider 13 holding the stem in the discharge tube. The nozzle may be used for the purposes of fire suppression.
Description
Technical Field
The technical field relates to fluid discharge nozzles. In preferred embodiments, the technical field relates specifically to nozzles which have improved fire suppression capabilities.
Background to the Invention and Prior Art Known to the Applicant(s)
For many years nozzles used on UK Royal Navy vessels have been employed to selectively provide either a radial water wall spray or a high impact jet. As far as the applicant is aware these were never covered by patent protection. More recently a company called Gold Ring Industries provides an example of this kind of nozzle on their website as Nozzle NSN421-99-5523-5391. In the event that a version of this nozzle cannot be easily accessed online, the UK Royal Navy's nozzle comprises a discharge tube which is operatively connected to a nozzle body. The discharge tube forms a fluid passage configured to carry fluid to an output end. The discharge tube terminates in an output lip at the output end which comprises a convex shape. This convex lip operates with the underside of a baffle head which comprises a concave shape in order to direct the fluid discharge. A pattern sleeve or shaper is provided to facilitate either a perpendicular spray
10 18 relative to the longitudinal axis of the nozzle or a longitudinal jet when the pattern sleeve is sufficiently extended.
More recently, a nozzle with a radial spray capability was disclosed in GB2524378. This prior art document largely retains the same features as that of the UK Royal Navy's nozzle. In particular, it requires a convex upper lip for the discharge tube which directs the fluid discharge with the baffle head necessarily having a concave lower surface; whereby dependent upon the position of the pattern sleeve, this prior art nozzle either provides a radial spray or a straight jet. Due to the prior art construction which is designed to minimise turbulence whilst accelerating the flow in converging channels, the resulting jets are high impact which when in close proximity to, for example, electrical equipment would cause severe undesirable damage.
The various embodiments of the invention tackle the well-known problem of selectively providing either a radial water wall spray or a longitudinal jet in a number of different approaches which depart significantly from both the long established prior art of the UK Royal Navy and the much more recent proposal.
Summary of the Invention
In a first broad independent aspect, the invention provides a fluid discharge nozzle, comprising: a discharge tube forming a fluid conduit for carrying fluid towards a discharge end of the nozzle; a pattern sleeve displaceable between a first position which is relatively retracted in the longitudinal direction of the nozzle and a second position which is relatively extended; and a baffle head; wherein the baffle head comprises on its underside an annular fluid deflection surface which is flat and extends in a direction substantially perpendicular to the longitudinal axis of the discharge tube; the baffle head being positioned relative to the pattern sleeve; whereby in the first position of the pattern sleeve, the fluid discharge from the nozzle is in the form of a spray substantially perpendicular to the longitudinal axis of the discharge tube and in the second position the fluid discharge from the nozzle is primarily a jet in the longitudinal direction.
This configuration is particularly advantageous because it provides significant turbulence immediately prior to the exit path because fluid particles strike the flat surface and are
10 18 consequently deflected. This area of turbulence creates particles of fluid moving in multiple directions. The exit path is structured either as a perpendicular spray in a preferred embodiment or primarily as a longitudinal jet. In addition to this many of the particles which are not solely moving in a forward direction shear the water droplet into 5 smaller particles as the fluid emerges which causes sideways components to effectively widen the jet. This provides a significantly greater area of small droplets when compared to the prior art which is particularly significant in fire suppression capability when in the spray mode while also significantly reducing potentially damaging kinetic energy as the many fluid particles are not exclusively being projected forward and benefit from having a 10 significant sideways component.
In a subsidiary aspect, the nozzle further comprises an elongate stem holding the baffle head and extending in the fluid conduit; the elongate stem having a diameter which decreases in the direction of fluid discharge. Prior art proposals have either been consigned 75 to either require short stems or strictly uniform diameter stems from the distal extremity of the nozzle where fluid enters the nozzle to its fluid outlet. By contrast, a significant mechanical improvement is provided particularly for elongate stems as in certain embodiments the base of the stem is significantly larger than its upper most portion allowing the stem to withstand greater bending moments and higher cycles of use. It is 20 also particularly advantageous as the upper most portion of the stem may be significantly narrower in diameter to improve the attachment of any appropriate baffle head should the stem and baffle head be configured as a two part arrangement. The embodiments of the invention are not limited to the baffle head and the stem being formed as a combination of parts as the baffle head and stem may optionally be integrally formed. Improved fluid 25 dynamic effects arise progressively towards the baffle head.
In a further subsidiary aspect, the nozzle further comprises an elongate stem for holding said baffle head and extending in said fluid conduit; said elongate stem comprising an abutment surface for engaging said nozzle body, in use, whereby said stem is self-centring 30 under fluid pressure in the nozzle whilst being movable within a clearance between the stem and the nozzle body when no fluid pressure is present in the nozzle.
10 18
In a further subsidiary aspect, the decrease in diameter of the stem is graduated. In an optional configuration, the decrease in diameter incorporates a plurality of closely contiguous rings or steps of differing diameter. In further advantageous embodiments, the surface of the stem incorporates a plurality of protrusions whereby turbulence is increased.
These may be disposed as an array of protrusions.
In a further subsidiary aspect, the fluid discharge tube incorporates at its discharge extremity a convex lip with a flat outer most surface which is substantially perpendicular to the longitudinal axis of the nozzle; and the pattern sleeve incorporates a flat surface 10 which is substantially perpendicular to the longitudinal axis of the nozzle; the pattern sleeve being configured so that in the first position the flat surface of the pattern sleeve is in line with the flat outer most surface of the lip. This configuration is particularly advantageous when considered in combination with the previously defined flat surface on the underside of the baffle head in the provision of the advantageous radial spray.
In a further subsidiary aspect, the baffle head incorporates a surface about its perimeter which is a flat surface which is substantially parallel to the longitudinal axis of the nozzle. Both of the primary prior art proposals discussed above require a convex aspect to the perimeter of the baffle head. By contrast, this configuration provides a concentric exit 20 pathway between two parallel surfaces which are particularly significant when the pattern sleeve or shaper is in the jet position. By adopting this configuration, the firefighting nozzle has much greater fire suppression capability due to the consequential provision of smaller droplets. In other words, in the second position the fluid discharge forms a jet with a far reaching central portion projecting fluid discharge primarily in the longitudinal 25 direction of the nozzle whilst at the same time providing a dispersed droplet portion surrounding the central portion in order to optimise the fire suppression capability. In jet mode, embodiments reduce therefore the potential impact and damage that might arise, in use, for example, when fire fighting in confined spaces where sensitive electronic equipment might be present.
In a further subsidiary aspect, the fluid discharge tube incorporates at its discharge extremity a convex lip with a flat outer most surface which is substantially perpendicular to the longitudinal axis of the nozzle; and the pattern sleeve or shaper incorporates a flat surface in the internal diameter of the pattern sleeve which is substantially parallel to the
10 18 longitudinal axis of the nozzle; the pattern sleeve being configured so that in the second position the flat surface of the internal diameter of the pattern sleeve and the flat perimeter surface of the baffle head causes a fluid discharge jet which is primarily in the longitudinal direction. This combination of features provides an advantageous jet configuration for enhanced firefighting.
In a subsidiary aspect, the baffle head incorporates a receiving portion; and the baffle head is coupled to an elongate stem by a fastener which incorporates a head which locates entirely in the receiving portion. This provides a relatively smooth outer portion which is 10 best suited for maintenance whilst at the same time providing improved protection around the head of the fastener.
In a subsidiary aspect, the upper side of the baffle head projects in a central portion further forward than at its perimeter region. This provides the baffle head structure with an enhanced resistance to stresses and strains for potential greater cycles of use.
In a further subsidiary aspect, the perimeter region incorporates a taper. This further improves the structure of the baffle head.
In a further subsidiary aspect, the baffle head incorporates a boss for securing over the upper most extremity of the elongate stems; the boss having an outermost diameter which is substantially parallel to the longitudinal axis of the nozzle. This configuration is particularly advantageous in assisting in the provision of the turbulence for the enhanced firefighting capabilities discussed above whilst at the same time improving the strength of 25 the attachment between the stem and the baffle head.
In a further subsidiary aspect, in the first position, the fluid discharge forms a curtain around the nozzle which is primarily between 85° and 90° from the longitudinal axis of the nozzle.
In a further subsidiary aspect, in said second position the fluid discharge forms a jet with a far reaching central portion projecting fluid discharge primarily in the longitudinal direction of the nozzle and a dispersed droplet portion surrounding said central portion.
10 18
In a further subsidiary aspect, in said second position the fluid discharge forms a jet where less than half of the jet's cross-section shortly after the outlet is formed of droplets whose lines of travel are solely in the longitudinal direction.
Ina further subsidiary aspect, the stem and the baffle head are integrally formed.
In a further subsidiary aspect, the nozzle further comprises a spider for holding said stem in the discharge tube and a releasable fastener is provided to secure the spider to the stem.
In a further broad aspect, the invention provides a fluid discharge nozzle, comprising: a discharge tube forming a fluid conduit for carrying fluid towards a discharge end of the nozzle; a pattern sleeve displaceable between a first position which is relatively retracted in the longitudinal direction of the nozzle and a second position which is relatively extended; and a baffle head; wherein the baffle head comprises on its underside a fluid deflection surface; the baffle head being positioned relative to the pattern sleeve; whereby in the first position of the pattern sleeve, the fluid discharge from the nozzle is in the form of a spray substantially perpendicular to the longitudinal axis of the discharge tube and in the second position the fluid discharge from the nozzle is primarily a jet in the longitudinal direction; wherein the baffle head is integrally formed with a stem and held by a spider relative to the nozzle body.
In a further broad aspect, the invention provides a fluid discharge nozzle, comprising: a discharge tube forming a fluid conduit for carrying fluid towards a discharge end of the nozzle; a pattern sleeve displaceable between a first position which is relatively retracted in the longitudinal direction of the nozzle and a second position which is relatively extended; and a baffle head; wherein the baffle head comprises on its underside a fluid deflection surface; the baffle head being positioned relative to the pattern sleeve; whereby in the first position of the pattern sleeve, the fluid discharge from the nozzle is in the form of a spray substantially perpendicular to the longitudinal axis of the discharge tube and in the second position the fluid discharge from the nozzle is primarily a jet in the longitudinal direction; wherein the nozzle further comprises an elongate stem holding said baffle head and extending in said fluid conduit; said elongate stem having a diameter which decreases in the direction of fluid discharge.
10 18
In a further broad aspect, the invention provides a fluid discharge nozzle, comprising: a discharge tube forming a fluid conduit for carrying fluid towards a discharge end of the nozzle; a pattern sleeve displaceable between a first position which is relatively retracted in the longitudinal direction of the nozzle and a second position which is relatively extended;
and a baffle head; wherein the baffle head comprises on its underside a fluid deflection surface; the baffle head being positioned relative to the pattern sleeve; whereby in the first position of the pattern sleeve, the fluid discharge from the nozzle is in the form of a spray substantially perpendicular to the longitudinal axis of the discharge tube and in the second position the fluid discharge from the nozzle is primarily a jet in the longitudinal direction, wherein said nozzle further comprises an elongate stem for holding said baffle head and extending in said fluid conduit; said elongate stem comprising an abutment surface for engaging said nozzle body, in use, whereby said stem is self-centring under fluid pressure in the nozzle whilst being movable within a clearance between the stem and the nozzle body when no fluid pressure is present in the nozzle.
Brief Description of the Figures
Figure 1 shows a cross-sectional view of a first embodiment of the invention with the shaper or pattern sleeve in its retracted position.
Figure 2 shows a close up view of the portion of the interaction between the baffle head and the lip of the discharge tube when the pattern sleeve is in its retracted position.
Figure 3 shows a part cross-sectional view of a nozzle with the pattern sleeve in its extended position.
Figure 4 shows a perspective view of the stem and baffle head.
Figure 5 shows a cross-sectional view of the stem and baffle head.
Figure 6 shows a cross-sectional view of a nozzle and a magnified view of the interaction between the base of the stem and the nozzle body.
Figure 7 shows a cross-sectional view of a ragged jet which can be contrasted with a high impact jet of figure 8.
10 18
Figure 9 shows a cross-sectional view of a further embodiment of a nozzle with the pattern sleeve in the retracted position.
Figure 10 shows a cross-sectional view of a further embodiment of a nozzle with the pattern sleeve in the retracted position and an array of teeth around the exit of the discharge tube.
Figure 11 shows a cross-sectional view of a stem and its attachment to its spider.
Figure 12 shows a perspective view of a stem and its attachment to its spider.
Figure 13 shows a further embodiment of a stem in perspective view.
Figure 14 shows the embodiment of figure 13 in cross-sectional view.
Figure 15 shows a perspective view of a further embodiment of the baffle head where the forward most head surface is flat.
Figure 16 shows a cross-sectional view of a further embodiment of the baffle head integrated as one piece with the stem where the forward most head surface is flat.
Detailed Description of the Figures
Figure 1 shows a fluid discharge nozzle generally referenced 1 with a discharge tube 2 for carrying fluid towards a discharge end 3 of the nozzle. Discharge tube 2 is shown as coupled to nozzle body 4. The coupling between the discharge tube 2 and the nozzle body 4 may be facilitated by a fastener 5 which may incorporate an externally threaded screw for mating with a correspondingly sized internally threaded bore 6A. The lower portion of the screw engages a collar 6 which extends partly into the radially outward most outer portion of the discharge tube. This coupling allows the position of the discharge tube to be adjusted to control the flow rate through the nozzle. In the forward most portion of the discharge tube an annular recess 7 is formed to receive an O-ring or any other suitable
10 18 sealing arrangement. A further annular recess 9 may be provided in the lower most portion of the discharge tube.
At the centre of the discharge tube, an elongate stem 10 extends between a lower region
11 and a baffle head 12. The lower portion of the stem may be appropriately thickened and attached to a spider 13. The spider 13 acts as a junction member between the stem 10 and the nozzle body 4. Whilst at the same time providing adequate openings for the fluid to flow into the discharge tube. A rounded end 32 is provided as the proximal extremity of the stem. The upper portion 14 of the stem is equipped with an axial bore 15 10 for receiving fastener 16. The bore 15 may be threaded to cooperate with the threaded outside diameter of fastener 16. The diameter of the stem substantially decreases from the lower most portion 11 to the upper most portion 14. In a preferred embodiment, the diameter changes in a step wise form. Alternatively, the stem may be graduated or incorporate a plurality of closely contiguous ring-shaped portions which decrease in diameter in the direction of discharge. The stem is also provided with a radius 17 in the lower most portion of the stem. The upper portion of the discharge tube also incorporates a convex lip 18.
Figure 2 shows the convex lip 18 in a closer view. It also depicts baffle head 12 which comprises at its underside an annular surface 19 which acts to deflect fluid radially. The longitudinal axis is depicted as axis X in Figure 2. The flat surface 19 extends substantially perpendicular to this longitudinal axis. In preferred embodiments, the flat surface is between 85° and 90° to this axis. Optionally, the annular surface extends exactly 90° to the longitudinal axis. The perimeter of the baffle head incorporates a further flat surface which extends substantially in the longitudinal axis or parallel to the longitudinal axis.
Furthermore, the upper portion of the baffle head has a tapered portion 21 between the flat perimeter 20 and an upper most surface 22. A recess portion 23 allows the head 24 of a fastener 16 to be recessed within the outer most boundary of the baffle head. By so constructing the baffle head, a smooth upper most surface of the baffle head may be provided. In the downwards direction a boss 25 extends in order to fit around an upper most portion of the stem 10. The boss 25 has an outer most diameter which is preferably a flat surface extending in the longitudinal direction. A tapered portion 26 is defined in the lower most region of the boss.
10 18
A pattern sleeve or shaper 27 is rotatably attached to the nozzle body 4. A cam 28 is shaped and configured to run along a trough to allow the pattern sleeve to translate in the longitudinal direction in response to a rotation of the pattern sleeve. In the configuration described in Figure 2, the pattern sleeve is in its most retracted position where the upper most flat surface 29 is in line with the upper most flat surface 30 of the pattern sleeve 27 in order to result in a radial spray which is substantially in the direction perpendicular to the longitudinal axis.
By appropriately rotating the pattern sleeve, cam 28 may travel along the trough until the pattern sleeve is in its extended position as shown in Figure 3. In this configuration the fluid once again passes between convex surface 18 and the underside 21 of the baffle head and thereafter is channelled between parallel surfaces 20 and 31 in order to result in a jet with a far reaching central portion projecting fluid discharge primarily in the longitudinal direction and a dispersed droplet portion surrounding the central portion.
Figures 4 and 5 show stem 10 in combination with baffle head 12. Lower portion 11 of the stem comprises the rounded end 32 and a plurality of legs such as legs 33 and 34 which can form a junction or an engagement between the base of the stem and the nozzle body.
Figure 6 shows further detail with respect to this engagement where leg 33 is lodged between the lower extremity of nozzle body 4 and a further nozzle body portion 35. Nozzle body portion 35 is attached to nozzle body 4 with a water tight attachment mechanism incorporating an O ring 36. The forward-most surface 37 of leg 33 abuts, in 25 use, against lower most surface 38 of body 4. The side surface 39 and the lower-most surface 40 are in close proximity to corresponding surfaces of the body portion 35. There is however a clearance between these surfaces in order to allow the stem to remain secured within the nozzle whilst allowing it to be displaceable within the constraints of the nozzle body in order to minimise the risk of breakage of the stem when the nozzle is not in use. In 30 use, however, the engagement and the internal pressure applied to the stem causes it to self-centre in abutment with the nozzle body.
Figure 7 contrasts a so called ragged jet achieved by the turbulence provided by the structure of a nozzle in accordance with an embodiment of the invention and a high
10 18 impact low turbulence jet of figure 8. In figure 7, in a region for example 0.2 m away from the nozzle, over 50% of the jet is constituted of particles of fluid with multiple directions of travel whilst a central portion remains with particles of fluid directed primarily in the longitudinal direction in order to provide sufficient reach in the longitudinal direction.
Thus, in the jet mode of operation, this nozzle provides an advantageous dispersion in the jet in order to minimise impact damage in close proximity to the jet.
Figure 9 shows a fluid discharge nozzle generally referenced 101 with a discharge tube 102 for carrying fluid towards a discharge end 103 of the nozzle. Discharge tube 102 is shown 10 as coupled to nozzle body 104. The coupling between the discharge tube 102 and the nozzle body 104 may be facilitated by a fastener 105 which may incorporate an externally threaded screw for mating with a correspondingly sized internally threaded bore 106A. The lower portion of the screw engages a collar 106 which extends partly into the radially outward most outer portion of the discharge tube. This coupling allows the position of the 15 discharge tube to be adjusted to control the flow rate through the nozzle. In the forward most portion of the discharge tube an annular recess 107 is formed to receive an O-ring or any other suitable sealing arrangement. A further annular recess 109 may be provided in the lower most portion of the discharge tube.
At the centre of the discharge tube, an elongate stem 110 extends between a lower region
111 and an integral baffle head portion 112. The lower portion of the stem may be attached to a spider 113. The spider 113 acts as a junction member between the stem 10 and the nozzle body 4 whilst at the same time providing adequate openings for the fluid to flow into the discharge tube. A nut 132 with a dome shape is provided at the proximal extremity of the stem to secure the stem in place relative to the spider. The lower portion
113 of the stem is equipped with a threaded portion 115 for securing the stem to a bore provided in the spider 113. The bore 116 may optionally be threaded to cooperate with the threaded outside diameter of the threaded portion of the stem. The diameter of the stem is at its greatest above its connection with the spider and thereafter substantially 30 decreases towards the upper most portion 114. In a preferred embodiment, the diameter changes in a step wise form. Alternatively, the stem may be graduated or incorporate a plurality of closely contiguous ring-shaped portions which decrease in diameter in the direction of discharge. The upper portion of the discharge tube incorporates a convex lip 118.
10 18
The baffle head portion 112 of the stem comprises at its underside an annular surface 119 which acts to deflect fluid radially. The flat surface 119 extends substantially perpendicular to this longitudinal axis. In preferred embodiments, the flat surface is between 85° and 5 90° to this axis. Optionally, the annular surface extends exactly 90° to the longitudinal axis. The perimeter of the baffle head incorporates a further flat surface 117 which extends substantially in the longitudinal axis or parallel to the longitudinal axis.
Furthermore, the upper portion of the baffle head has a tapered portion 121 between the 10 flat perimeter 117 and an upper most surface 122.
A pattern sleeve or shaper 127 is rotatably attached to the nozzle body 104. A cam 128 is shaped and configured to run along a trough to allow the pattern sleeve to translate in the longitudinal direction in response to a rotation of the pattern sleeve. In the configuration described in Figure 9, the pattern sleeve is in its most retracted position where the upper most flat surface 129 is in line with the upper most flat surface 130 of the pattern sleeve 127 in order to result in a radial spray which is substantially in the direction perpendicular to the longitudinal axis.
By appropriately rotating the pattern sleeve, cam 128 may travel along the trough until the pattern sleeve is in its extended position. This configuration would be similar to the configuration shown in Figure 3. In this configuration the fluid once again passes between convex surface 118 and the underside 119 of the baffle head and thereafter is channelled between parallel surfaces 117 and 131 in order to result in a jet with a far reaching central portion projecting fluid discharge primarily in the longitudinal direction and a dispersed droplet portion surrounding the central portion.
Figure 10 shows a variation of the embodiment of figure 9 where all the features are identical except for the introduction of a ring of teeth 150 at the exit of the discharge 30 tube.
Figures 11 and 12 show stem 110 with its integral baffle head portion 112 and its threaded lower portion 111 in combination with a spider 113 incorporating a central longitudinal bore 116 for receiving said threaded lower portion 111. A nut or other
10 18 appropriate releasable attachment means is provided to secure the stem to the spider. The nut 132 incorporates a lower most dome shaped portion and a threaded bore 151 in its upper most portion. The nut may incorporate a plurality of facets such as facet 152 which may optionally define a hexagon.
Figures 13 and 14 show a further embodiment of the releasable attachment means provided between the spider 113 and the stem 110. Once again, the stem incorporates a baffle head portion 112. At its proximal extremity the stem has a recess 153 with a threaded inner diameter 154 into which a threaded bolt 155 may be secured. The threaded 10 bolt 155 releasably attaches spider 113 to the stem 110. A boss 156 projects from the spider and lodges in a diameter of corresponding size. The head 157 of the bolt has a recessed portion 158 suitable for receiving a screw driver or power tool for tightening the bolt whereby the stem is secured to the spider.
Whilst the figures show a baffle head with a distal most flat surface 159 with a slight taper 160. The taper is outside of the flow of fluid through the nozzle and therefore doesn't interact in shaping it. In a further embodiment, the front surface of the baffle head is strictly parallel to the flat underside of the baffle head.
Figure 15 shows a stem 110 with an integral baffle head 212. The baffle head comprises a forward most surface 213 which is parallel to the flat underside 214 of the baffle head. The forward most surface and the side 215 form a 90-degree corner whilst the side 215 and the underside 214 of the baffle head likewise form a 90-degree corner.
Other Embodiments
In order to enhance the benefit of smaller droplet sizes a ring of fixed or spinning teeth may be interposed in the discharge region to further reduce the droplet sizes and the total droplet surface area if desired.
A mechanical locking mechanism may be provided to prevent accidental opening of a control valve when the nozzle is configured to discharge in the jet position.
In further embodiments, instead of the pattern sleeve having a flat upper most surface perpendicular to the longitudinal direction, the pattern sleeve may be selected to form an angle greater than 45° with respect to the longitudinal axis.
An infinite number or a plurality of discrete positions are achievable between the radial spray position and the jet position as the pattern sleeve is rotated in use.
10 18
Claims (16)
1. A fluid discharge nozzle, comprising:
a discharge tube forming a fluid conduit for carrying fluid towards a discharge end of said
5 nozzle;
a pattern sleeve displaceable between a first position which is relatively retracted in the longitudinal direction of the nozzle and a second position which is relatively extended; and a baffle head;
wherein said baffle head comprises on its underside an annular fluid deflection surface
10 which is flat and extends in a direction substantially perpendicular to the longitudinal axis of the discharge tube; said baffle head being positioned relative to said pattern sleeve; whereby in said first position of said pattern sleeve the fluid discharge from said nozzle is in the form of a spray substantially perpendicular to the longitudinal axis of the discharge tube and in said second position the fluid discharge from said nozzle is primarily a jet in
75 the longitudinal direction.
2. A fluid discharge nozzle according to claim 1, wherein said nozzle further comprising an elongate stem holding said baffle head and extending in said fluid conduit; said elongate stem having a diameter which decreases in the direction of fluid discharge.
3. A fluid discharge nozzle according to claim 1, wherein said nozzle further comprises an elongate stem for holding said baffle head and extending in said fluid conduit; said elongate stem comprising an abutment surface for engaging said nozzle body, in use, whereby said stem is self-centring under fluid pressure in the nozzle whilst being movable
25 within a clearance between the stem and the nozzle body when no fluid pressure is present in the nozzle.
4. A fluid discharge nozzle according to either claim 2 or claim 3, wherein said decrease in diameter of said stem is graduated.
5. A fluid discharge nozzle according to any of the preceding claims, wherein said fluid discharge tube incorporates at its discharge extremity a convex lip with a flat outermost surface which is substantially perpendicular to the longitudinal axis of the nozzle; and said pattern sleeve incorporates a flat surface which is substantially perpendicular to the
08 10 18 longitudinal axis of the nozzle; said pattern sleeve being configured so that in said first position said flat surface of said pattern sleeve is in line with the flat outermost surface of said lip.
5
6. A fluid discharge nozzle according to any of the preceding claims, wherein said baffle head incorporates a surface about its perimeter which is a flat surface which is substantially parallel to the longitudinal axis of the nozzle.
7. A fluid discharge nozzle according to claim 6, wherein said fluid discharge tube
10 incorporates at its discharge extremity a convex lip with a flat outermost surface which is substantially perpendicular to the longitudinal axis of the nozzle; and said pattern sleeve incorporates a flat surface in the internal diameter of said pattern sleeve which is substantially parallel to the longitudinal axis of the nozzle; said pattern sleeve being configured so that in said second position said flat surface of the internal diameter of said
75 pattern sleeve and the flat perimeter surface of said baffle head causes a fluid discharge jet which is primarily in the longitudinal direction.
8. A fluid discharge nozzle according to any of the preceding claims, wherein said baffle head incorporates a receiving portion; and said baffle head is coupled to an elongate stem
20 by a fastener which incorporates a head which locates entirely in said receiving portion.
9. A fluid discharge nozzle according to any of the preceding claims, wherein said upper side of the baffle head projects in a central portion further forward than at its perimeter region.
10. A fluid discharge nozzle according to claim 9, wherein said perimeter region incorporates a taper.
11. A fluid discharge nozzle according to either claim 2 or claim 3, wherein said baffle head
30 incorporates a boss for securing over the uppermost extremity of said elongate stem; said boss having an outermost diameter which is substantially parallel to the longitudinal axis of the nozzle.
12. A fluid discharge nozzle according to any of the preceding claims, wherein in said first position the fluid discharge forms a curtain around said nozzle which is primarily between 85 and 90 degrees from the longitudinal axis of the nozzle.
13. A fluid discharge nozzle according to any of the preceding claims, wherein in said second position the fluid discharge forms a jet with a far reaching central portion projecting fluid discharge primarily in the longitudinal direction of the nozzle and a dispersed droplet portion surrounding said central portion.
14. A fluid discharge nozzle according to any of the preceding claims, wherein in said second position the fluid discharge forms a jet where less than half of the jet's crosssection shortly after the outlet is formed of droplets whose lines of travel are solely in the longitudinal direction.
15. A fluid discharge nozzle according to any one of claims 1, 5, 6, 7, 9, 10,12, 13 and 14, wherein said stem and said baffle head are integrally formed.
16. A fluid discharge nozzle according to claim 15, further comprising a spider for holding said stem in the discharge tube and a releasable fastener is provided to secure the spider to the stem.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1710901.8A GB201710901D0 (en) | 2017-07-06 | 2017-07-06 | Improved fluid discharge nozzle |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201811216D0 GB201811216D0 (en) | 2018-08-29 |
| GB2565228A true GB2565228A (en) | 2019-02-06 |
| GB2565228B GB2565228B (en) | 2020-02-05 |
Family
ID=59676749
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1710901.8A Ceased GB201710901D0 (en) | 2017-07-06 | 2017-07-06 | Improved fluid discharge nozzle |
| GB1811216.9A Active GB2565228B (en) | 2017-07-06 | 2018-07-06 | Fluid discharge nozzle |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1710901.8A Ceased GB201710901D0 (en) | 2017-07-06 | 2017-07-06 | Improved fluid discharge nozzle |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB201710901D0 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2552445A (en) * | 1950-02-08 | 1951-05-08 | Clarissa E Caird | Fire hose nozzle |
| US4653693A (en) * | 1984-08-27 | 1987-03-31 | Task Force Tips Incorporated | Fire fighting fog nozzle |
| FR2588348A1 (en) * | 1985-10-07 | 1987-04-10 | Matincendie Sa | Fire branch-pipe tap with adjustable flow rate and angle of spread |
| US5312048A (en) * | 1993-03-25 | 1994-05-17 | Task Force Tips, Inc. | Regulating nozzle with adjustable effective area baffle |
| US20010020650A1 (en) * | 1999-12-07 | 2001-09-13 | Louis Lanteri | Fire hose lance |
| GB2524378A (en) * | 2014-01-30 | 2015-09-23 | Akron Brass Co | Nozzle with radial spray jet capability |
-
2017
- 2017-07-06 GB GBGB1710901.8A patent/GB201710901D0/en not_active Ceased
-
2018
- 2018-07-06 GB GB1811216.9A patent/GB2565228B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2552445A (en) * | 1950-02-08 | 1951-05-08 | Clarissa E Caird | Fire hose nozzle |
| US4653693A (en) * | 1984-08-27 | 1987-03-31 | Task Force Tips Incorporated | Fire fighting fog nozzle |
| FR2588348A1 (en) * | 1985-10-07 | 1987-04-10 | Matincendie Sa | Fire branch-pipe tap with adjustable flow rate and angle of spread |
| US5312048A (en) * | 1993-03-25 | 1994-05-17 | Task Force Tips, Inc. | Regulating nozzle with adjustable effective area baffle |
| US20010020650A1 (en) * | 1999-12-07 | 2001-09-13 | Louis Lanteri | Fire hose lance |
| GB2524378A (en) * | 2014-01-30 | 2015-09-23 | Akron Brass Co | Nozzle with radial spray jet capability |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2565228B (en) | 2020-02-05 |
| GB201811216D0 (en) | 2018-08-29 |
| GB201710901D0 (en) | 2017-08-23 |
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