WO2022271389A1 - Buse à pulvérisation réglable - Google Patents

Buse à pulvérisation réglable Download PDF

Info

Publication number
WO2022271389A1
WO2022271389A1 PCT/US2022/030833 US2022030833W WO2022271389A1 WO 2022271389 A1 WO2022271389 A1 WO 2022271389A1 US 2022030833 W US2022030833 W US 2022030833W WO 2022271389 A1 WO2022271389 A1 WO 2022271389A1
Authority
WO
WIPO (PCT)
Prior art keywords
spray
nozzle
section
outlet
adjustable
Prior art date
Application number
PCT/US2022/030833
Other languages
English (en)
Inventor
Sunny Sethi
Nicholas MCKIBBEN
Sagar Bhatia
Original Assignee
HEN Nozzles Inc.
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 PCT/US2021/038393 external-priority patent/WO2022119601A1/fr
Priority claimed from US17/569,821 external-priority patent/US20220176177A1/en
Priority claimed from PCT/US2022/012242 external-priority patent/WO2022271203A1/fr
Application filed by HEN Nozzles Inc. filed Critical HEN Nozzles Inc.
Priority to AU2022300109A priority Critical patent/AU2022300109A1/en
Priority to CA3223691A priority patent/CA3223691A1/fr
Publication of WO2022271389A1 publication Critical patent/WO2022271389A1/fr

Links

Classifications

    • 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
    • B05B1/32—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 in which a valve member forms part of the outlet opening
    • 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
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/044—Slits, i.e. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa

Definitions

  • the present invention relates to nozzles for spraying fluids, and more particularly to nozzles for spraying liquids under pressure that adjust the pattern of fluid exiting the nozzle.
  • Nozzles are used to receive a fluid under pressure and control the shape and other characteristics of the stream of the fluid as it exits the nozzle.
  • Such nozzles typically have an inlet opening, an exit opening that may take the form of a single orifice or multiple orifices, and a fluid flow path extending between the inlet opening and the exit opening.
  • the inlet opening may include a fitting, which may be circular in cross section, for connecting the nozzle to a complementary fitting on a tank, flexible hose, or pipe.
  • Nozzles frequently are designed to increase the velocity of the fluid entering the nozzle to project the fluid stream exiting the nozzle in a long trajectory. This is achieved by providing the nozzle with a constriction in the fluid flow path.
  • the constriction may take the form of a decrease in cross-sectional area from the nozzle inlet opening to the exit opening and/or an orifice or other restriction in the fluid flow path that effectively reduces the cross- sectional area of fluid flow. Providing such a constriction to fluid flow under constant pressure and constant volume flow rate results in the increase in fluid flow velocity.
  • the nozzle outlet orifice itself is reduced in cross-sectional area relative to the nozzle inlet and provides the constriction to increase velocity of fluid flow.
  • Fluid conduits having a flow path defined by smooth continuous nozzle walls and an absence of internal obstructions provide laminar flow of the fluid flowing through them. Laminar fluid flow is desirable over turbulent fluid flow because it optimizes fluid flow through the nozzle and provides a uniform spray from the exit opening.
  • a disadvantage with some nozzle designs is that obstructions, sharp comers, and abrupt changes in fluid flow direction in the fluid flow path of a nozzle present obstructions in the flow of fluid through the nozzle that cause turbulence in the flow of fluid through the nozzle. Turbulence in fluid flow through nozzles is undesirable in applications in which a spray from the exit opening that is uniform across the width of the exit opening is desired.
  • a nozzle that adjusts the effective cross-sectional area of the exit opening to vary the shape of the fluid stream from the exit opening but that does not present inclusions, obstructions, or sharp comers in the fluid flow path through the nozzle that create turbulence in the fluid.
  • a compact nozzle that is rugged and yet provides optimal laminar fluid flow.
  • the present disclosure describes embodiments of a nozzle and the method of its operation that optimizes fluid flow through the nozzle and consequently the throw distance and coverage of the fluid stream exiting the nozzle.
  • the nozzle includes a nozzle outlet in the form of a variable outlet opening in which the effective width of the opening can be varied manually by an operator to shape a spray pattern of fluid exiting the nozzle.
  • an adjustable nozzle includes a nozzle body having an inlet section with an inlet opening, an outlet section with an outlet opening, and a fluid flow path extending from the inlet opening to the outlet opening; an adjustable spray restrictor segment located in the outlet section; and an actuator that displaces the adjustable spray restrictor segment toward and away from a center of the fluid flow path, thereby varying an effective width of the outlet opening to vary a pattern of fluid flowing from the fluid flow path through the outlet opening.
  • a method of varying a width of an oblong stream of fluid exiting an oblong outlet opening in an outlet section of a nozzle body includes actuating an adjustment collar of an actuator to displace an adjustable spray restrictor segment toward and away from a center of a fluid flow path through the nozzle body, thereby varying an effective width of the oblong outlet opening to vary a pattern of fluid flowing from the fluid flow path through the outlet opening.
  • FIG. 1 is a perspective view of an exemplary embodiment of the disclosed smooth bore nozzle
  • Fig. 2 is an exploded perspective view of the smooth bore nozzle of Fig. 1;
  • FIG. 3 is a top view in section of the smooth bore nozzle of Fig. 1 showing the fluid flow path, in which the pivot arms are actuated to provide a wide exit stream;
  • Fig. 4 is a top view in section of the smooth bore nozzle of Fig. 1 showing the fluid flow path, in which the pivot arms are actuated to provide a narrow exit stream;
  • FIG. 5 is a perspective view of the smooth bore nozzle of Fig. 1 in which the adjustment collar is removed;
  • Fig. 6 is a side elevation in section of the smooth bore nozzle of Fig. 1 showing the fluid flow path;
  • Fig. 7 is a perspective view of the interior of a first adjustment collar element of the embodiment of Fig. 1;
  • Fig. 8 is a perspective view of the interior of a second adjustment collar element of the embodiment of Fig. 1;
  • Fig. 9 is a perspective view of an embodiment of a pivot arm of the embodiment of Fig. 1;
  • Fig. 10 is a perspective view of another embodiment of a pivot arm of the embodiment of Fig 1;
  • Fig. 11 is a schematic diagram of an embodiment of the disclosed smooth bore nozzle.
  • the smooth bore nozzle assembly includes a nozzle body, generally designated 700, having an inlet section 701 with first and a second smooth, planar opposing converging inlet side walls 713, 714, contiguous with smooth, planar opposing converging inlet top and bottom walls 715, 716 that define an inlet section flow path T2.
  • the first and the second inlet side walls 713, 714 and the inlet top and bottom walls 715, 716 form an inlet section opening 717, an inlet section outlet opening 718, and an unobstructed rectangular inlet section 701 from the inlet section opening to the inlet section outlet opening.
  • the nozzle body 700 includes a transition section 501 upstream of the inlet section T2.
  • the transition section 501 transitions from a round cross section to the rectangular cross section of the inlet section 701.
  • the nozzle body 700 includes a fitting 1205 that takes the form of a threaded swivel adaptor 1200 that attaches the nozzle assembly 600 to a source of fluid under pressure, such as a hose, and in embodiments, a firehose.
  • the fitting 1205 is secured to the nozzle body 700 by a retaining ring 1204 that is seated in an annular recess 703, which permits relative rotation of the fitting and the nozzle body 700.
  • the transition section T1 and the inlet section T2 are unitary.
  • the nozzle body 700 includes a straight section 502 having first and second smooth, planar opposing parallel side walls 719, 720 contiguous with the first and the second inlet side walls 713, 714, respectively, and contiguous with smooth, planar opposing parallel top and bottom walls 722, 724, respectively, that are contiguous with the inlet top and bottom walls 715, 716.
  • the first and second parallel side walls 719, 720 and opposing parallel top and bottom walls 722, 724 define a straight section flow path T3.
  • the first and second parallel side walls 719, 720 and the first and the second inlet side walls 713, 714 are contiguous with the inlet top and bottom walls 715, 716, respectively.
  • the first and the second opposing parallel side walls 719, 720 and the opposing parallel top and bottom walls 722, 724 form a straight section inlet opening 726 attached to receive the fluid from the inlet section outlet opening 718 and a straight section outlet opening 728.
  • the straight section inlet opening 726 and straight section outlet opening 728 together form the unobstructed rectangular straight section 502.
  • the fluid passageway T3 of straight section 502 is a fluid passageway from the straight section inlet opening 726 to the straight section outlet opening 728 and functions as a fluid relaxation section of the nozzle body 700.
  • the nozzle body 700 includes an outlet section 730 having smooth, planar opposing converging outlet top and bottom walls 732, 734, respectively, contiguous with the parallel top and bottom walls 722, 724, respectively, and contiguous with first and second opposing diverging outlet side walls 736, 738, respectively, that are contiguous with the opposing parallel side walls 719, 720, forming an outlet flow passageway T4.
  • the outlet top and bottom walls 732, 734 are contiguous with the first and the second outlet side walls 736, 738, respectively, to form an outlet section inlet opening 740 attached to receive the fluid from the straight section outlet opening 728.
  • the outlet section 730 forms an unobstructed rectangular outlet section 730 from the outlet section inlet opening 740 to terminate in an oblong, fixed outlet opening 742.
  • the inlet section 701, rectangular straight section 502, and outlet section 730 together form a continuous, linear, unobstructed fluid flow path D.
  • a cross-sectional areas of the rectangular inlet section 701 and the rectangular outlet section 730 (as well as rectangular straight section 502) remain constant or decrease in a downstream direction of the fluid flow path D (i.e., the direction of arrow D), and a perimeter of a cross section of the rectangular inlet section 701 decreases along a length of the inlet section and a perimeter of a cross section of the rectangular outlet section 730 increases along a length of the outlet section.
  • the direction of the fluid flow D can change sharply.
  • turbulence is generated, causing fluid to move spirally.
  • the areas of spirally moving fluid are also known as eddies. These local eddies can persist downstream causing loss in water kinetic energy in the direction of fluid flow. This loss due to this sharp transition can be described by bend loss B that is given by the following equation:
  • K is dependent on the total length of the bend and the ratio of the curvature of the bend and the cross-section height.
  • the cross-section height is equivalent to the pipe diameter and for a square pipe the value is equivalent to the side of the square.
  • V is the average velocity of fluid flowing through the nozzle assembly 600.
  • Straight section 502 minimizes the swirling motion of the local eddies to propagate in the fluid flow through the nozzle 600.
  • the length of the straight section 502 depends on the cross-section height ht and the convergence and divergence angles of the fluid flow path D.
  • the straight section is at least 2 times the cross-section height ht at the transition region.
  • the straight section is at least 4 times the cross-section height ht at the transition region.
  • width of cross-section in the straight section is Wi
  • width of the cross-section at the nozzle exit is IV 2
  • the width anywhere in between is W x where x denotes the distance from the end of the straight section
  • W x Wi+(2xtan0 d ) (2) where 0, / ⁇ s the divergence angle with respect to the straight section.
  • the height h (Fig. 6) needs to converge or reduce to maintain or reduce the cross-sectional area ( W x h). If the height h at the end of the straight section 502 is hi and height at the end of the diverging section is Ii2. and the height at distance x from the end of the straight section is h x , then:
  • Wihi (W + (2xtan6 d ))h x (5)
  • h K[(W ihi)/(w 1 + IxtanOd) ] (6) where K ⁇ 1 and depends on the ratio of cross-sectional area at the straight section and end of the diverging section.
  • a rate of convergence (i.e., slope or angle made with the center of fluid flow path D) of the opposing converging first and second inlet side walls 713, 714 and/orthe converging inlet top and bottom walls 715, 716 is greater than a rate of divergence (i.e., slope or angle made with centerline D) of the first and the second opposing diverging outlet side walls 736, 738, such that a velocity of a fluid flowing through the nozzle assembly 600 increases.
  • the outlet section 730 terminates in a modulation segment 401 that defines a modulation flow passageway G (see, e.g., Figs. 3 and 4).
  • the modulation segment 401 terminates in a nozzle outlet opening 702.
  • the nozzle outlet opening 702 is defined by parallel opposing top and bottom outlet edges 744, 746, respectively, rectilinear along entire lengths thereof, and first and second opposing side edges 748, 750, respectively, wherein the opposing top and bottom outlet edges are parallel and contiguous with flat, parallel outlet top and bottom walls 752, 754, respectively, of the modulation segment 401.
  • the modulation segment 401 includes first and second opposing side edges 756, 758 that diverge and are a linear continuation of side walls 736, 738 of outlet section 730.
  • the side edges 756, 758 and side walls 736, 738 are continuous, smooth, and the fluid pathway is unobstructed along its length.
  • the walls of the transition section 501 and the inlet section 701 are continuous, smooth, and provide an unobstructed fluid pathway.
  • the inlet opening 717 of the inlet section 701 is rectangular and a periphery of the inlet opening of the inlet section is contiguous with a periphery of the rectangular outlet of the transition section 501.
  • the outlet section 730 and modulation segment 401 which define the modulation flow passageway G, provide a smooth fluid pathway to the nozzle outlet 702. This is accomplished by the modulation segment 401 having first and second opposing diverging side walls 756, 758 contiguous with the first and the second opposing diverging outlet section side walls 736, 738, and parallel top and bottom walls 752, 754 contiguous with the converging outlet top and bottom walls 732, 734.
  • the first and the second side walls 756, 758 are contiguous with the first and the second opposing extension side walls 736, 738 and terminate in the unobstructed rectangular modulation section 401 from the outlet extension section inlet opening 740 to receive the fluid from the straight section outlet opening 728 and terminating in the oblong nozzle outlet opening 702.
  • the shape of the cross section of the oblong nozzle outlet opening 702 is selected from a rectangle, rhombus, and an ellipse.
  • a height h x between the outlet top and bottom walls at a distance x from the outlet section inlet opening is determined by equation (6).
  • the diverging first and the second opposing extension side walls 736, 738 each have a first segment that diverges from a centerline of the outlet section, represented by linear flow pathway D, at a first angle and a second segment, downstream of the first segment, that diverges from a centerline of the outlet section fluid passageway at a second angle that is greater than the first angle.
  • the second segment takes the form of walls 756, 758 of modulation segment 401.
  • the second segment is adjacent and is contiguous with the first segment.
  • the first segment and the second segment of the diverging first and the second opposing extension side walls 736, 738 are each smooth and planar in shape.
  • the second segments are contiguous with the first segments and make an angle with the first segments that does not exceed 30°.
  • a nozzle 600 includes an inlet section 701 having a first and a second smooth, planar opposing inlet side walls 713, 714 and smooth, planar opposing inlet top and bottom walls 715, 716.
  • the first and the second inlet side walls 713, 714 and the inlet top and bottom walls 715, 716 are contiguous and form an inlet opening 717, an inlet section outlet opening 718, and an unobstructed rectangular inlet section fluid passageway T2 from the inlet section inlet opening to the inlet section outlet opening.
  • At least one pair of the first and second opposing inlet side walls 713, 714 and the inlet top and bottom walls 715, 716 are converging such that a cross sectional area of the inlet section fluid passageway decreases continuously from the inlet section inlet opening to the outlet section outlet opening.
  • the inlet section 701 is contiguous with a straight section 502 having first and second smooth, planar opposing parallel side walls 719, 720 contiguous with the first and the second inlet side walls 713, 714, respectively, and having smooth, planar opposing parallel top and bottom walls 722, 724 that are contiguous with the inlet top and bottom walls 715, 716.
  • the first and the second opposing parallel side walls 722, 724 and the opposing parallel top and bottom walls719, 720 form a straight section inlet opening 726 attached to receive the fluid from the inlet section outlet opening 718, a straight section outlet opening 728, and an unobstructed rectangular straight section fluid passageway T3 from the straight section inlet opening to the straight section outlet opening.
  • the outlet section 730 includes smooth, planar opposing converging outlet top and bottom walls 732, 734 contiguous with the parallel top and bottom walls 722, 724, respectively, and is contiguous with first and second opposing diverging outlet side walls 736, 738 that are contiguous with the opposing parallel side walls 719,720.
  • the outlet top and bottom walls 732, 734 are contiguous with the first and the second outlet side walls 736, 738 to form an outlet section inlet opening 740 attached to receive the fluid from the straight section outlet opening 728 and form an unobstructed rectangular outlet section fluid passageway T4 from the outlet section inlet opening to terminate in an oblong outlet opening 742.
  • At least one pair of the first and second opposing outlet side walls 736, 738 and the outlet top and bottom walls 732,734 are diverging such that a cross sectional area of the outlet section fluid passageway T4 decreases continuously from the outlet section inlet opening 740 to the oblong outlet opening 742.
  • a perimeter of a cross section of the rectangular inlet section decreases along a length of the inlet section 701 and a perimeter of a cross section of the rectangular outlet section fluid passageway T4 increases along a length of the outlet section 730.
  • the rectangular inlet fluid passageway T2, the straight section fluid passageway T3, and the outlet section fluid passageway T4 together define a continuous nozzle fluid passageway D bilaterally symmetrical about a central axis of the nozzle 600 extending in a fluid flow direction.
  • the inlet section 701 includes a transition section 501 having a round inlet 503, a rectangular outlet that coincides with inlet opening 717 of the inlet section 701, and a continuous side wall 1206 that extends between the round inlet and the rectangular outlet and defines a fluid pathway T1 attached to the inlet opening of the inlet section.
  • the side wall 1206 is defined by an entrance wall segment circular in cross section that transitions to an exit wall segment that is rectangular in cross section.
  • the transition section 501 is unitary and contiguous with the inlet section 701.
  • a method of making a nozzle 600 includes forming an inlet section 701 having afirst and a second smooth, planar opposing converging inlet side walls 713, 714 and smooth, planar opposing converging inlet top and bottom walls 715, 716 and attaching the first and the second inlet side walls to the inlet top and bottom walls to form an inlet opening 717, an inlet section outlet opening 718, and an unobstructed rectangular inlet section fluid passageway T2 from the inlet opening to the inlet section outlet opening.
  • a straight section 502 is formed having first and second smooth, planar opposing parallel side walls 719, 720 and smooth, planar opposing parallel top and bottom walls 722, 724 such that the first and the second parallel side walls are attached to the parallel top and bottom walls to form a straight section inlet opening 726, a straight section outlet opening 728, and an unobstructed rectangular straight section fluid passageway T3 from the straight section inlet opening to the straight section outlet opening.
  • the first and the second parallel side walls 719, 720 are attached to the first and the second inlet side walls, 713, 714, respectively, and the parallel top and bottom walls 722, 724 are attached to the converging inlet top and bottom walls to receive the fluid from the inlet section outlet opening 718.
  • An outlet section 730 is formed having smooth, planar opposing converging outlet top and bottom walls 732, 734 and first and second smooth, planar opposing diverging outlet side walls 736, 738 that are contiguous with the opposing converging outlet top and bottom walls to form an outlet section inlet opening 740 attached to receive the fluid from the straight section outlet opening 718 and an outlet opening 742.
  • the top and bottom walls 732, 734 and side walls 736, 738 form an unobstructed rectangular outlet section fluid passageway T4 from the outlet section inlet opening 740 to terminate in an oblong outlet opening.
  • the outlet top and bottom walls 732, 734 are attached to the parallel top and bottom walls 722, 724, and the first and second opposing diverging outlet side walls 736, 738 are attached to the first and the second parallel side walls 719, 720.
  • a cross-sectional area of the rectangular inlet section fluid passageway T2 and a cross-sectional area of the rectangular outlet section fluid passageway T4 decrease in a downstream direction, and a perimeter of a cross section of the rectangular inlet section decreases along a length of the inlet section and a perimeter of a cross section of the rectangular outlet section fluid passageway increases along a length of the outlet section.
  • the rectangular inlet fluid passageway T2, the straight section fluid passageway T3, and the outlet section fluid passageway T4 together define a continuous nozzle fluid passageway D bilaterally symmetrical about a central axis of the nozzle extending in a fluid flow direction.
  • the nozzle 600 takes the form of an adjustable nozzle.
  • the adjustable nozzle 600 is configured to vary a width of the fluid stream exiting the nozzle outlet 702 within a predetermined range.
  • the adjustable nozzle 600 includes a nozzle body 700 having an inlet section 701 with an inlet section opening 717, an outlet section 730 in which the nozzle outlet 702 of the modulation segment 401 takes the form of a variable outlet opening 742, and the fluid flow path D extends from the inlet opening to the outlet opening.
  • the modulation segment 401 takes the form of an adjustable spray restrictor segment 1210 in the outlet section 730.
  • the nozzle 600 includes an actuator 1212 that displaces the adjustable spray restrictor segment 1210 toward and away from a center of the fluid flow path D, thereby varying an effective width W (see Fig. 5) of the variable outlet opening 742 to vary a pattern of fluid flowing from the fluid flow path D through the variable outlet opening 742.
  • the actuator 1212 includes a manually positionable adjustment collar 800 (see Figs. 7 and 8), which in embodiments is in the form of two complementary halves 899, 900, that is rotatably mounted on the nozzle body 700. Manual rotation of the adjustment collar 800 relative to the nozzle body 700 displaces the adjustable spray restrictor segment 1210.
  • the adjustment collar 800 includes an indicator tab 801 that corresponds to a position of the spray restrictor segment 1210 and mating tabs 808, 908 and grooves 812, 912 that effect proper mating of the halves 899, 900.
  • the adjustment collar 800 includes a second set of mating tabs 804, 904 and grooves 813, 913 that facilitate proper mating of the halves 899, 900 during assembly.
  • the tabs include screw holes 810, 910, 809, 909, 806, 906, 805, 905 to receive screws (not shown) to secure the halves 899, 900 together.
  • the adjustable spray restrictor segment 1210 includes at least a first spray adjustment arm 1000 that is displaced by rotation of the adjustment collar 800 toward and away from the center of the fluid flow path D to vary the effective width W of the variable outlet opening 742.
  • the first spray adjustment arm 1000 makes a pivotal engagement with the outlet section 730 and includes a downstream bearing surface 1010 that engages the adjustment collar 800.
  • the nozzle body 700 includes a first bearing recess 712 in the outlet section 730 (see Figs. 3 and 4).
  • the first spray adjustment arm 1000 includes an upstream bearing surface 1006 (see Fig. 9) that engages the first bearing recess 712 to make the pivotal engagement about a first pivot point PI.
  • the adjustment collar 800 includes an upstream end face 913 having an internal or upstream eccentric groove 914 extending about the variable outlet opening 742 that receives and engages the downstream bearing surface 1010, such that rotation of the adjustment collar pivots the first spray adjustment arm toward and away from the center of the fluid flow path D (see Figs. 3 and 4).
  • the radially inner boundary of the eccentric groove 914 is bounded and defined at an outer perimeter by an eccentric ridge d.
  • the eccentric groove 914 is shaped to pivot the first spray adjustment arm 1000 between a first position, shown in Fig. 4, resulting in a minimum spray width W and a second position, shown in Fig. 3, resulting in a maximum spray width.
  • the eccentric groove 914 is in the form of a camming surface that engages the downstream bearing surface 1010 of the first spray adjustment arm 1000, and the camming surface is curved, having a radius of curvature that corresponds to a radius of the first spray adjustment arm from the first pivot point PI to the camming surface of the eccentric groove 914.
  • the eccentric groove 914 is formed of groove segments 802, 902 on the complementary halves 899, 900.
  • the adjustable spray restrictor segment 1210 includes a second spray adjustment arm 1100 that is opposed to the first spray adjustment arm 1000.
  • the second spray adjustment arm 1100 is also displaced by rotation of the adjustment collar 800 toward and away from the center of the fluid flow path D to vary the effective width W of the variable outlet opening 742.
  • the nozzle body 700 includes a second bearing recess 1712 in the outlet section.
  • the second spray adjustment arm 1100 includes an upstream bearing surface 1106 that engages the second bearing recess 1712 to make a pivotal engagement with the outlet section about a second pivot point P2 and a downstream bearing surface 1110 that engages the camming surface of the eccentric groove 914 of the adjustment collar 800.
  • the outlet section 703 of the adjustable nozzle 600 includes the modulating segment 401 in the form of a terminal segment having opposed planar, parallel top and bottom walls 752, 754 and first and second opposed planar side walls 756, 758 contiguous with the top and bottom walls.
  • the first and second spray adjustment arms 1000, 1100 are mounted in the terminal segment to pivot toward and away from the first and second side walls 756, 758, respectively, when displaced by rotation of the adjustment collar 800.
  • the adjustment collar 800 is connected to the first and second spray adjustment arms 1000, 1100 to pivot the first and second spray adjustment arms relative to the terminal segment of the modulating segment 401 toward and away from the first and second opposed planar side walls 756, 758 to selectively vary the effective width W of the variable outlet opening 742.
  • the first and second spray adjustment arms 1000, 1100 are pivotally mounted at the upstream ends 1006, 1106, respectively, thereof to the first and second bearing recesses 712, 1712, respectively, of the first and second side walls 756, 758.
  • the first and second spray adjustment arms 1000, 1100 include a guide surface 1003 that faces the center C (Fig. 11) of the fluid flow path D.
  • first and second spray adjustment arms 1000, 1100 include a guide surface 1103 that faces the center C of the fluid flow path D.
  • the guide surfaces 1003, 1103 are positioned in the terminal segment of the modulation section 730 to contact fluid flowing through the terminal segment of the modulating segment 40 land define the effective width W of the variable outlet opening 728.
  • the guide surfaces 1003 of the first and second adjustment arms 1000, 1100 are substantially flat and planar.
  • the guide surfaces 1103 of the first and second adjustment arms 1000, 1100 are curved in a width direction (i.e., the “h” dimension in Fig. 5).
  • the guide surfaces 1103 of the first and second adjustment arms 1000, 1100 are shaped to transition in a downstream direction from a flat contour to a curved contour in a width direction.
  • the adjustment arms 1000, 1100 include flat upper and lower surfaces 1004, 1005 and 1104, 1105, respectively, that bear against, but pivot relative to, the top and bottom walls 752, 754 of the modulation segment 401 to provide a fluid seal.
  • the first and second adjustment arms 1000, 1100 optionally include a gasket 1107 that extends about the adjustment arm in an annular, longitudinal recess between the spine 1101 and the face 1103. This gasket prevents fluid leakage between the face 1103 and the top and bottom walls 752, 754 of the modulation segment 401.
  • the gasket 1107 is made of rubber or an elastomer.
  • the first and second adjustment arms 1000, 1100 include notches or cutouts 1002, 1102 that engage and are captured by the eccentric ridge d formed about the variable outlet opening 742.
  • the first and second adjustment arms 1000, 1100 which pivot in response to the varying distance of the eccentric ridge d from the center of the fluid flow path D, vary the effective width W of the variable outlet opening 742.
  • the eccentric ridge d is in the form of an ellipse, but also can be in the form of other eccentric (i.e., non-circular) shapes to provide different responses in width of the spray pattern exiting the variable outlet opening 742 corresponding to a given rotation of the adjustment collar 800.
  • the adjustment collar 800 includes stops or bosses 807, 907 positioned to engage cutouts 706, 707 formed in the outer periphery of the nozzle body 700.
  • the stops 807, 907 limit rotation of the adjustment collar 800 relative to the nozzle body 700 to a preselected amount.
  • the relative rotation is limited to a 90° clockwise and counterclockwise rotation.
  • the eccentric groove 914 is sized and shaped such that such a 90° relative rotation of the adjustment collar 800 will cause the first and second adjustment arms 1000, 1100 to pivot from their maximum separation shown in Fig. 3, and hence maximum effective width W of the variable outlet opening 742 and fluid stream exiting the variable outlet opening, to their minimum separation shown in Fig. 4, and hence minimum effective width W of the variable outlet opening and exiting fluid stream.
  • the first and the second spray adjustment arms 1000, 1100 engage the eccentric groove 914 and eccentric ridge d formed in the actuator 1212 such that the rotation of the actuator causes the eccentric groove to move relative to the first and second spray adjustment arms, thereby pivoting the first and second spray adjustment arms toward and away from the first and second side walls 756, 758, respectively.
  • the bottom surface of the eccentric groove 914 is parabolic in contour such that the downstream bearing surfaces 1006, 1010 maintain constant contact with the bottom surface of the groove during their pivotal movement from maximum separation to minimum separation.
  • a method of varying a width of an oblong stream of fluid exiting a variable outlet opening 742 in an outlet section 730 of a nozzle body 700 of a nozzle 600 includes actuating an adjustment collar 800 of an actuator to displace a spray modulating segment 1000, 1100 toward and away from a center of a fluid flow path D through the nozzle body, thereby varying an effective width of the oblong outlet opening 742 to vary a pattern of fluid flowing from the fluid flow path through the outlet opening 742.
  • actuating the adjustment collar 800 includes pivoting first and second opposed spray adjustment arms 1000, 1100 attached to the outlet section 730 and extending into the fluid flow path D toward and away from the center of the fluid flow path, thereby varying the effective width of the variable outlet opening 742 to vary the width of the rectangular stream of fluid from the variable outlet opening.
  • the disclosed smooth bore nozzle 600 provides an economical design for a fluid nozzle that finds a particularly useful application as a firefighting nozzle because it is robust and provides minimal internal resistance to provide maximum stream distance for fluid under a given pressure and volume flow rate. While the forms of apparatus and methods disclosed herein are preferred embodiments of the disclosed smooth bore nozzle, it is understood that the invention is not limited to these precise embodiments and that changes may be made therein without departing from the scope of the invention.

Landscapes

  • Nozzles (AREA)

Abstract

Selon certains modes de réalisation, une buse réglable comprend un corps de buse ayant une section d'entrée avec une ouverture d'entrée, une section de sortie avec une ouverture de sortie, et un trajet d'écoulement de fluide s'étendant de l'ouverture d'entrée à l'ouverture de sortie ; un segment restricteur à pulvérisation réglable situé dans la section de sortie ; et un actionneur qui déplace le segment restricteur à pulvérisation réglable vers un centre du trajet d'écoulement de fluide, et à l'opposé de celui-ci, ce qui permet de faire varier une largeur efficace de l'ouverture de sortie pour faire varier un motif de fluide s'écoulant à partir du trajet d'écoulement de fluide à travers l'ouverture de sortie.
PCT/US2022/030833 2021-06-22 2022-05-25 Buse à pulvérisation réglable WO2022271389A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2022300109A AU2022300109A1 (en) 2021-06-22 2022-05-25 Nozzle with adjustable spray
CA3223691A CA3223691A1 (fr) 2021-06-22 2022-05-25 Buse a pulverisation reglable

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
PCT/US2021/038393 WO2022119601A1 (fr) 2020-12-05 2021-06-22 Buse à intérieur lisse à haute efficacité
USPCT/US2021/038393 2021-06-22
US17/569,821 2022-01-06
US17/569,821 US20220176177A1 (en) 2019-07-30 2022-01-06 Adjustable nozzle and method of operation
PCT/US2022/012242 WO2022271203A1 (fr) 2021-06-22 2022-01-13 Buse réglable et procédé de fonctionnement
USPCT/US2022/012242 2022-01-13

Publications (1)

Publication Number Publication Date
WO2022271389A1 true WO2022271389A1 (fr) 2022-12-29

Family

ID=84545733

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2022/030833 WO2022271389A1 (fr) 2021-06-22 2022-05-25 Buse à pulvérisation réglable
PCT/US2022/030831 WO2022271388A1 (fr) 2021-06-22 2022-05-25 Buse à alésage lisse

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2022/030831 WO2022271388A1 (fr) 2021-06-22 2022-05-25 Buse à alésage lisse

Country Status (3)

Country Link
AU (1) AU2022300109A1 (fr)
CA (1) CA3223691A1 (fr)
WO (2) WO2022271389A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US177239A (en) * 1876-05-09 Improvement in adjustable nozzles for hose-pipes
US583969A (en) * 1897-06-08 Joseph askins
CH240951A (fr) * 1943-10-01 1946-02-15 Stauffer Frederic Lance d'arrosage.
US4986477A (en) * 1987-04-06 1991-01-22 Claber S.P.A. Spray gun with adjustment of the shape of the jet
US5850971A (en) * 1997-03-28 1998-12-22 Smith; Gary L. Adjustable chopper diverter for a spray gun
WO2016031612A1 (fr) * 2014-08-25 2016-03-03 日立工機株式会社 Buse de machine de nettoyage et machine de nettoyage
US20220176177A1 (en) * 2019-07-30 2022-06-09 HEN Nozzles Inc. Adjustable nozzle and method of operation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8900809A (nl) * 1989-04-03 1990-11-01 Innoned B V Gritstraalinrichting.
US6293857B1 (en) * 1999-04-06 2001-09-25 Robert Pauli Blast nozzle
US6626738B1 (en) * 2002-05-28 2003-09-30 Shank Manufacturing Performance fan nozzle
US20090193615A1 (en) * 2008-02-01 2009-08-06 Phuong Taylor Nguyen Fan nozzle
FR2977183B1 (fr) * 2011-06-29 2014-09-19 Air Liquide Dispositif de projection de glace seche, notamment de glace carbonique
US11779938B2 (en) * 2019-07-30 2023-10-10 Hen Nozzles, Inc. High-efficiency smooth bore nozzles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US177239A (en) * 1876-05-09 Improvement in adjustable nozzles for hose-pipes
US583969A (en) * 1897-06-08 Joseph askins
CH240951A (fr) * 1943-10-01 1946-02-15 Stauffer Frederic Lance d'arrosage.
US4986477A (en) * 1987-04-06 1991-01-22 Claber S.P.A. Spray gun with adjustment of the shape of the jet
US5850971A (en) * 1997-03-28 1998-12-22 Smith; Gary L. Adjustable chopper diverter for a spray gun
WO2016031612A1 (fr) * 2014-08-25 2016-03-03 日立工機株式会社 Buse de machine de nettoyage et machine de nettoyage
US20220176177A1 (en) * 2019-07-30 2022-06-09 HEN Nozzles Inc. Adjustable nozzle and method of operation

Also Published As

Publication number Publication date
WO2022271388A1 (fr) 2022-12-29
CA3223691A1 (fr) 2022-12-29
AU2022300109A1 (en) 2024-01-18

Similar Documents

Publication Publication Date Title
US8366070B2 (en) Fluid control valve
EP1574764B1 (fr) Vanne
US20220176177A1 (en) Adjustable nozzle and method of operation
US20160263593A1 (en) Adjustable smooth bore nozzle
US4589439A (en) Fire apparatus valve
US5934328A (en) In-line venturi
US20050258275A1 (en) Adjustable solid-flow nozzle and method
US20030062495A1 (en) Fluid control valve with low pressure drop ratio factor
CA2154697C (fr) Ajutage jet plat pour appareil de nettoyage haute pression
US4825906A (en) Angle pattern control valve
US20220296943A1 (en) Nozzle with adjustable spray
WO2022271389A1 (fr) Buse à pulvérisation réglable
US3591129A (en) Ball-type valve
US20220297138A1 (en) Smooth bore nozzle
US11660621B2 (en) Reduced precipitation rate nozzle
WO2008088443A2 (fr) Soupape à venturi de décalage
US4607702A (en) Fire monitors
US3080884A (en) Distributor valve
US3591091A (en) Deflector-type spray nozzle
AU2015270279B2 (en) Fluid restriction nozzle for hand washing
WO2022271203A1 (fr) Buse réglable et procédé de fonctionnement
US4055306A (en) Liquid spray nozzle having a randomly directionally unstable discharge characteristic
EP4097556B1 (fr) Régulateur de pression à siège de soupape oblique
US20050121640A1 (en) Flow control device for fluids
CA2062404A1 (fr) Debitmetre a vortex

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22828976

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 3223691

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2022300109

Country of ref document: AU

Ref document number: AU2022300109

Country of ref document: AU

ENP Entry into the national phase

Ref document number: 2022300109

Country of ref document: AU

Date of ref document: 20220525

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22828976

Country of ref document: EP

Kind code of ref document: A1