EP2952261B1 - Vollkegel-sprühdüse - Google Patents

Vollkegel-sprühdüse Download PDF

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Publication number
EP2952261B1
EP2952261B1 EP15170680.1A EP15170680A EP2952261B1 EP 2952261 B1 EP2952261 B1 EP 2952261B1 EP 15170680 A EP15170680 A EP 15170680A EP 2952261 B1 EP2952261 B1 EP 2952261B1
Authority
EP
European Patent Office
Prior art keywords
fluid
stirring chamber
spray nozzle
chamber
orifice
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.)
Active
Application number
EP15170680.1A
Other languages
English (en)
French (fr)
Other versions
EP2952261A1 (de
Inventor
Hervé FOUBERT
Bruno Renault
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solcera SAS
Original Assignee
Solcera SAS
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Filing date
Publication date
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Priority to PL15170680T priority Critical patent/PL2952261T3/pl
Publication of EP2952261A1 publication Critical patent/EP2952261A1/de
Application granted granted Critical
Publication of EP2952261B1 publication Critical patent/EP2952261B1/de
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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
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3426—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels emerging in the swirl chamber perpendicularly to the outlet axis
    • 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
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3478—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet the liquid flowing at least two different courses before reaching the swirl chamber

Definitions

  • the invention relates to a spray nozzle.
  • a spray nozzle is externally like a case having an inlet port and an outlet port. Inside, the nozzle body is arranged to allow the dispersion of a liquid in the form of droplets, and to form at the outlet a jet of droplets, or spray, which has a determined distribution in space. Such nozzles are for example used in the agricultural field for spraying crop protection products on crops.
  • nozzles There are different types of nozzles according to the particular shape of their jet: nozzles called straight jet, flat jet, cone jet, which can be a hollow cone, or a solid cone.
  • the present invention is concerned with spray nozzles of the cone jet type, in particular in solid cone.
  • the nozzle comprises a body forming a holster and which comprises one or more organs and / or elements designed to disturb the jet, that is to say act on the flow of liquid and to modify the characteristics before ejection by the outlet, depending on the desired spray and the shape of the desired exit jet.
  • the nozzle body comprises a cylindrical generally cylindrical agitation chamber having a central outlet port in direct communication with the nozzle outlet.
  • the flow of liquid In order to be able to produce a conical jet, the flow of liquid must be rotated upstream of the outlet orifice so as to generate a vortex.
  • the rotation of the liquid flow is obtained by introducing fluid inside the stirring chamber in a direction having a substantially tangential component relative to a peripheral wall of said stirring chamber.
  • whirl nozzle or "swirl nozzle”
  • tangential whirl nozzles tangential whirl
  • the fact that the jet is in solid cone, or in hollow cone mainly depends on the pressure profile inside the stirring chamber.
  • fluid is introduced into the chamber through one or more oblique side channels oriented in a direction substantially tangential to the periphery of said agitation chamber and substantially perpendicular to the exit direction of the chamber. jet.
  • the fluid circulates essentially at the periphery of the chamber, which gives a hollow cone jet.
  • fluid is also introduced in a substantially axial direction towards the center of the chamber, for example by means of a longitudinal channel which enters the chamber through a closure piece located on the upstream side of the chamber. said chamber.
  • the invention improves the spray performance of such nozzles.
  • the proposed spray nozzle comprises a body which has an inlet port and an outlet port, and which has, on the inlet port side, a fluid inlet area, which feeds a stirring chamber.
  • a body which has an inlet port and an outlet port, and which has, on the inlet port side, a fluid inlet area, which feeds a stirring chamber.
  • which has a substantially cylindrical peripheral wall, with an upstream wall and a downstream wall, the downstream wall having an adjacent ejection port and in direct fluid communication with the outlet of the nozzle, the outlet having a cross-section substantially frustoconical and the ejection orifice having a substantially cylindrical section and a flared portion on the side of the outlet orifice the upstream wall being traversed by at least one fluid inlet channel which opens in an axial direction in the chamber agitating with respect to said peripheral wall, and the peripheral wall being traversed by at least one other fluid inlet channel, which opens into said stirring chamber; n in a tangential direction, said spray nozzle.
  • the proposed spray nozzle is characterized in that the upstream wall comprises at least one blind cavity arranged at a distance from said axial inlet channel and open on a face facing towards the inside of the chamber, and in that the cavity is a peripheral groove encircling said channel and having a V-shaped cross-section.
  • This effect is particularly remarkable in the case of a row of nozzles forming for example a spray boom.
  • the cavity comprises a groove.
  • the throat is peripheral.
  • the throat may be annular.
  • the groove has a V-shaped cross section.
  • the upstream wall of the stirring chamber is defined, at least partially, by a closing part of said chamber.
  • the stirring chamber (which may also be called turbulence chamber) can thus be performed (in particular by machining) in the form of a chamber which is open on the upstream side.
  • the axial channel, as well as the cavity or cavities, can be made in this closing piece. For the final assembly of the nozzle, simply mount the closure piece on the stirring chamber.
  • the closure piece can integrate other walls if necessary, including the peripheral wall and the side channels.
  • the Figures 1 to 5 show a full cone spray nozzle.
  • the nozzle 1 comprises a body 2 forming a casing housing a stirring chamber 3, with its closure piece 4, an insert 5 and a peripheral seal 6 intended to ensure a seal between the insert 5 and the body 2.
  • the body 2 is of substantially cylindrical shape and comprises a peripheral wall 20 defining an interior space for housing the components of the nozzle 1.
  • the body 2 may be made, for example, of plastic.
  • the body 2 has an inlet orifice 21 intended to be connected to a supply of fluid to be sprayed, and an outlet orifice 22 intended for evacuation of the fluid in the form of a jet or spray in a solid cone.
  • the body 2 has, on the side of the inlet orifice 21, a peripheral rim 23 intended to serve as a support for the insert 5.
  • outlet port 22 On the outlet port 22 side, said outlet port 22 has a substantially frustoconical section.
  • the outlet orifice 12 also has a diameter smaller than the internal diameter of the body 2 so as to form an internal radial abutment 24.
  • the body 2 receives a stirring chamber 3.
  • the stirring chamber 3 is a hollow part of substantially cylindrical shape and comprises a downstream wall 31 having an ejection orifice 30, of substantially circular cross section, and a substantially circular peripheral wall 32. According to the embodiment shown, the stirring chamber 3 does not include an upstream wall. The closing of the stirring chamber 3 upstream side is performed by a closure piece 4, which will be described infra.
  • the peripheral wall 32 of the stirring chamber 3 defines a substantially cylindrical interior space. This internal space of the stirring chamber communicates with the ejection orifice 30 via an anterior portion of frustoconical section 35.
  • the anterior portion of frustoconical section 35 makes it possible to obtain the acceleration of the speed of rotation. ejection by concentrating the fluid towards the orifice 30.
  • the ejection orifice 30 has a substantially cylindrical section and a flared portion on the side of the outlet orifice 22 of the nozzle 1.
  • the stirring chamber 3 comprises an anterior portion oriented towards the outlet orifice 22 of the nozzle 1, having an outer diameter substantially equal to the internal diameter of the body 2.
  • the stirring chamber 3 also comprises a rear portion having an outer diameter smaller than the inside diameter of the body 2 to provide a circulation space between said body 2 and said stirring chamber 3.
  • the width of the circulation space is adapted to the fluid to be sprayed and the flow rate of said fluid to through the nozzle 1.
  • the peripheral wall comprises two lateral openings 33 through, in this case substantially longitudinal slots.
  • the lateral openings 33 are diametrically opposed and made so as to open into the stirring chamber 3 in a direction substantially tangential to the peripheral wall 32 or slightly inclined relative to said peripheral wall 32, inner side.
  • the stirring chamber 3 is disposed inside the body 2, its anterior portion coming against the inner radial abutment 24 of said body 2.
  • the ejection orifice 30 of the stirring chamber 3 is adjacent and in direct communication with the outlet port 22 of the body 2.
  • a closure piece 4 is then inserted inside the body 2 following the stirring chamber 3, said closure piece 4 closes the interior space.
  • the closure piece 4 has a substantially cylindrical shape and is an upstream wall of the stirring chamber 3.
  • the closing piece 4 is designed to have a through axial central channel 41 opening inside the stirring chamber 3 in a face 42 oriented towards the inside of said stirring chamber 3.
  • the face 42 has a cavity 43 arranged at a distance from said axial inlet channel 41.
  • the cavity 43 is a peripheral annular groove encircling the channel 41.
  • the cavity 43 has a V-shaped cross section.
  • the closing piece 4 has an anterior part, oriented towards the stirring chamber 3, having a diameter substantially equal to that of the rear portion of said stirring chamber 3.
  • the closing piece 4 is disposed at a distance from the wall 20 of the body 2 and, like the rear portion of the stirring chamber 3, provides a peripheral circulation space for the fluid to be sprayed.
  • the closure piece 4 also has a rear portion, oriented towards the inlet orifice 21 of the body 2 and having a reduced diameter, smaller than that of its anterior part. This back part is intended to engage with the insert 5 described infra which ensures the maintenance.
  • the insert 5 intended to ensure the maintenance of the stirring chamber 3 and the closure piece 4 in position and to close the case formed by the body 2.
  • the insert 5 is put in place and held by screwing and has for this purpose a threaded portion located near the flange 51 and designed to cooperate with a corresponding thread (not visible) of the body 2.
  • the insert 5 also constitutes a fluid inlet zone supplying the stirring chamber 3.
  • the insert 5 is a hollow part in a generally cylindrical shape having a flange 51 intended to bear against the peripheral flange 23 of the body 2.
  • the insert 5 extends inside the body 2 by a cylindrical extension 53 open at both ends.
  • the cylindrical extension 53 is intended to engage with the rear portion 42 of the closure piece 4 by interlocking.
  • the outer diameter of the cylindrical extension 53 is smaller than the internal diameter of the body 2 so as to provide a peripheral circulation space of the fluid.
  • Peripheral lateral openings 55 are formed in the cylindrical extension 53 in the vicinity of the end intended to come into engagement with the closure piece 4.
  • These lateral openings 55 are intended to allow a portion of the fluid to be sprayed to reach the peripheral circulation space.
  • the circulation of the fluid through the nozzle 1 is as follows.
  • a fluid supply to spray is connected to the nozzle 1.
  • the fluid enters the nozzle 1 through the orifice 21 of the body 2. More particularly, the fluid enters the nozzle through the insert 5.
  • the fluid passes through the insert 5 until, on the one hand, the lateral openings 55 are reached, and on the other hand, the channel 41 of the closure piece 4.
  • a first part of the fluid to be sprayed passes through the openings 55 and reaches the peripheral circulation space which extends to the stirring chamber 3 after passing along the closure piece 4.
  • the first part of the fluid is thus animated by a swirling motion.
  • a second part of the fluid to be sprayed passes axially through the insert to join the closure part 4 and its channel 41.
  • the second part of the fluid passes through said channel 41 to reach the stirring chamber 3 inside which said channel 41 opens.
  • the second part of the fluid thus joins the first part of said fluid substantially in the center of the vortex.
  • said fluid In addition to the vortex movement of which the fluid is animated inside the chamber, said fluid also comes into contact with the face 42 and its cavity 43.
  • the circulation of the fluid in the cavity 43 creates additional disturbances in the flow. said fluid, which promotes its atomization.
  • the first part of the fluid is then ejected through the orifice 30 of the stirring chamber 3, then passes through the outlet orifice 22 of the body 2 to exit the nozzle 1 in a conical configuration.
  • the cavity is a groove or a peripheral annular groove.
  • the cavity may be a punch.
  • the upstream wall of the stirring chamber may have several cavities.
  • the cavities may be distributed peripherally or partially peripherally.
  • the cavities can also be arranged concentrically.

Landscapes

  • Nozzles (AREA)

Claims (5)

  1. Sprühdüse (1) mit einem Körper (2), der eine Einlassöffnung (21) und eine Auslassöffnung (22) aufweist und der auf der Seite der Einlassöffnung eine Fluideinlasszone aufweist, die eine Agitationskammer (3) versorgt aufweisend eine im Wesentlichen zylindrische Umfangswand (32), mit einer stromaufwärtigen Wand (42) und einer stromabwärtigen Wand (31), wobei die stromabwärtige Wand eine Ausstoßöffnung (30) aufweist, welche benachbart und in direkter Fluidverbindung mit der Auslassöffnung (22) der Düse steht, wobei die Auslassöffnung (22) einen im Wesentlichen kegelstumpfartigen Querschnitt aufweist und die Ausstoßöffnung (30) einen im Wesentlichen zylindrischen Querschnitt und einen aufgeweiteten Abschnitt auf der Seite der Auslassöffnung (22) aufweist, wobei die stromaufwärtige Wand von mindestens einem Fluideinlasskanal (41) durchquert wird, der sich in einer bezüglich der Umfangswand (32) im Wesentlichen axialen Richtung in die Agitationskammer öffnet, und die Umfangswand von mindestens einem weiteren Fluideinlasskanal (33) durchquert wird, der in die Agitationskammer in einer im Wesentlichen tangentialen Richtung mündet, wobei die Sprühdüse dadurch gekennzeichnet ist, dass die stromaufwärtige Wand mindestens einen Blindhohlraum (43) umfasst, der von dem axialen Einlasskanal beabstandet und auf einer zum Inneren der Kammer hin ausgerichteten Seite offen ist, und dass der Hohlraum (43) eine umlaufende Nut ist, die den Kanal umgibt und einen V-Querschnitt aufweist.
  2. Sprühdüse (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Nut umlaufend ist.
  3. Sprühdüse (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Nut ringartig ist.
  4. Sprühdüse (1) nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass die Nut ein im Wesentlichen V-mäßiges Queschnittsprofil aufweist.
  5. Sprühdüse (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die stromaufwärtige Wand (42) der Agitationskammer (3) zumindest teilweise durch ein Verschlussteil (4) der Kammer definiert ist.
EP15170680.1A 2014-06-06 2015-06-04 Vollkegel-sprühdüse Active EP2952261B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15170680T PL2952261T3 (pl) 2014-06-06 2015-06-04 Dysza rozpylająca z pełnym stożkiem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1455150A FR3021880B1 (fr) 2014-06-06 2014-06-06 Buse de pulverisation a cone plein

Publications (2)

Publication Number Publication Date
EP2952261A1 EP2952261A1 (de) 2015-12-09
EP2952261B1 true EP2952261B1 (de) 2019-11-20

Family

ID=51261110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15170680.1A Active EP2952261B1 (de) 2014-06-06 2015-06-04 Vollkegel-sprühdüse

Country Status (5)

Country Link
EP (1) EP2952261B1 (de)
BR (1) BR102015013148B1 (de)
ES (1) ES2773287T3 (de)
FR (1) FR3021880B1 (de)
PL (1) PL2952261T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108160359B (zh) * 2016-12-08 2024-03-08 斯普瑞喷雾系统(上海)有限公司 可实现多种喷雾功能的喷嘴装置
FR3132649A1 (fr) 2022-02-16 2023-08-18 Solcera Buse de pulvérisation à jet conique

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE71453C (de) * berlin - anhaltische maschinenbau-actien-gesellschaft in Martinikenfelde bei Berlin Flüssigkeitszerstäubungsdüse mit vollem Staubkegel
US2755134A (en) * 1955-06-28 1956-07-17 Allied Chem & Dye Corp Atomizing spray for oil gas production
US3275248A (en) 1964-08-07 1966-09-27 Spraying Systems Co Modified full cone nozzle
DE2733102A1 (de) * 1977-07-22 1979-02-01 Bayer Ag Verfahren und vorrichtung zum zerstaeuben von fluessigkeiten
FR2522537B1 (fr) 1982-03-03 1985-10-18 Lafarge Refractaires Buse de pulverisation a chambre de turbulence
US4570860A (en) 1984-02-06 1986-02-18 Wm. Steinen Mfg. Co. 180° Nozzle body having a solid cone spray pattern
EP0787254B1 (de) * 1995-03-29 2002-06-12 Robert Bosch Gmbh Lochscheibe, insbesondere für einspritzventile
DE19815795A1 (de) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Zerstäuberscheibe und Brennstoffeinspritzventil mit Zerstäuberscheibe
CN102059178B (zh) * 2010-12-02 2012-07-04 厦门松霖科技有限公司 一种出脉动喷溅水的机构

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2773287T3 (es) 2020-07-10
PL2952261T3 (pl) 2020-05-18
BR102015013148B1 (pt) 2020-12-15
BR102015013148A2 (pt) 2016-07-05
EP2952261A1 (de) 2015-12-09
FR3021880B1 (fr) 2016-07-08
FR3021880A1 (fr) 2015-12-11

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