FR2815552A1 - Rotating nozzle for cleaning surfaces comprises hollow cone with internal helicoidal partitions delimiting corridors of equal width, needle fixed in nozzle inlet amplifies particle gyratory effect - Google Patents

Rotating nozzle for cleaning surfaces comprises hollow cone with internal helicoidal partitions delimiting corridors of equal width, needle fixed in nozzle inlet amplifies particle gyratory effect Download PDF

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Publication number
FR2815552A1
FR2815552A1 FR0013577A FR0013577A FR2815552A1 FR 2815552 A1 FR2815552 A1 FR 2815552A1 FR 0013577 A FR0013577 A FR 0013577A FR 0013577 A FR0013577 A FR 0013577A FR 2815552 A1 FR2815552 A1 FR 2815552A1
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Prior art keywords
nozzle
inlet
cleaning
sep
corridors
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Granted
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FR0013577A
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French (fr)
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FR2815552B1 (en
Inventor
Jean Michel Henry
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LOMAPRO
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LOMAPRO
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34Nozzles, 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
    • B05B1/3405Nozzles, 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00Devices or accessories for generating abrasive blasts
    • B24C5/02Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04Nozzles therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0084Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481Spray pistols or apparatus for discharging particulate material
    • B05B7/149Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed

Abstract

<P> The invention relates to a nozzle for cleaning surfaces, for example metal or stone, by means of a cleaning fluid formed of a mixture of granulate air and optionally water, shaped nozzle conical, the diameter of the outlet (3) of which is smaller than the diameter of the inlet (2), the jet of cleaning fluid having a conical trunk shape in which at least a part of the particles of the granulate follows a conical helical path, characterized in that the nozzle is formed mainly of a hollow cone (4) internally comprising helicoidal separations (5) delimiting in the interior volume of the nozzle helical corridors (6) of equal width, and constant width over their entire length. from the nozzle inlet (2) to the nozzle outlet (3). According to an alternative embodiment is fixed in the inlet (2) of the nozzle a needle (10) amplifying the gyratory effect of the particles The invention also relates to a suppor t for such a nozzle and an associated cleaning machine. Application: Cleaning stone or metal surfaces for example. </ P>

Description

<Desc / Clms Page number 1>

Figure img00010001

The invention relates to a nozzle for cleaning surfaces, for example metal or stone, by means of an air-granulate mixture, dry or wet, in the form of a rotating jet, it also relates to a support for such a nozzle, and an associated cleaning machine.

 Nozzles producing rotary jets of which already known, for example that described in patent EP 0 171 448. Such a nozzle is preceded by a mixing chamber having a lateral conical inlet, inclined at 45, of the air granulate mixture while the water is fed in the direction of the nozzle and must be sprayed in a chamber where the air-granulate-water mixture is carried out.

 The gyratory effect of the particles is given by the inclination of the inlet and the pressure of the mixture.

 The applicant has set itself the objective of proposing a completely new construction nozzle which makes it possible in particular to: - work over a wider range of pressure, especially at low pressures (less than 1 bar) with a jet of cleaning fluid in wherein at least a portion of the particles follows a helical path, - increasing the rotational speed of the particles, - increasing the proportion of rotated particles in the outlet jet to be connected to any nozzle support and which is at the same time inexpensive and lighter than all known systems.

 The objective is achieved by a nozzle for cleaning surfaces, for example of metal or stone, by means of a cleaning fluid formed of a mixture of granulate air and possibly water, conical nozzle the outlet diameter of which is smaller than the diameter of the inlet, the cleaning fluid jet having a conical trunk shape in which at least a portion of the granular particles follow a conical helical path, characterized in that the nozzle is formed mainly of a hollow cone internally with helical separations delimiting in the interior volume of the nozzle helical corridors of equal widths, and constant width all along their path from the nozzle inlet to the nozzle outlet.

 Preferably the corridors determine on the periphery of the entry even arcs distributed regularly, the starting points of the edges of the separations being arranged on a circle concentric with that of the inlet and of diameter slightly greater than that of the exit of so that the corridors meet before the exit.

<Desc / Clms Page number 2>

Figure img00020001

The invention also relates to a support connected to a nozzle according to the invention comprising a means for controlling the mixtures, the nozzle support being connected by a pipe to a mixing tank in which the granular air mixture is produced at the desired pressure, the granular air mixture arriving at the inlet of the nozzle in a linear path, in the axis of the nozzle, the support of the nozzle further comprising a lateral water inlet at 45 relative to the axis of the nozzle that the control means can be closed or opened depending on whether a dry or wet jet is desired.

 The invention also relates to a machine with a mixing tank connected to a nozzle-support assembly as above and to a water inlet.

 The invention will be better understood from the following description given with reference to the following appended figures: FIG. 1: side view of a first embodiment of the invention, FIG. 2: end view, of FIG. FIG. 3 is a side view of a second embodiment of the invention; FIG. 4 is an end view of the variant of FIG. 3; FIG. 5 is a side view of a FIG. needle valve that can be integrated into the nozzle according to the variant of Figure 3, - Figure 6: overall sketch of a cleaning device comprising a nozzle according to the invention.

 The invention may be proposed according to the two non-limiting embodiments of FIGS. (1,2) and (3,4).

 We first refer to Figures 1 and 2.

 A hollow conical nozzle (1) according to the invention is formed of a conical tube portion (4) with an inlet (2) of cleaning fluid, and an outlet (3) of cleaning fluid of smaller diameter. In the rest of the text and the claims, and for the sake of simplification, the tube portion (4) is called a cone (4).

 The cone (4) hollow is made of injected ceramic material, and molded, and internally comprises three helical separations (5) coming from molding with the cone and defining in the interior volume of the nozzle, three helical corridors (6) of equal widths, and constant width throughout their path from the nozzle inlet (2) to the nozzle outlet (3).

In FIG. 2, the departures of the corridors (6) determine on the periphery of

Figure img00020002

the entrance, three equal arcs (ei e2) (e3 e4) (e5 e6) distributed regularly and the departures of the separations are arranged on a circle

<Desc / Clms Page number 3>

Figure img00030001

concentric with that of the inlet (2) of diameter slightly larger than that of the outlet (3) so that the three corridors meet at three points (Si, S2, S3) angularly separated from substantially 600, a few millimeters (preferably 5 mm) before the exit (3).

 Preferably, the cone (4) is externally covered with a semi-flexible protection layer against shocks, for example rubber.

 According to this variant embodiment, the cleaning fluid leaves the nozzle (1) in a semi-directional conical jet (7), ie a portion of the inlet fluid (8) is trapped in the corridors (6) producing a rotational movement of the particles transported, the other part being projected substantially linearly.

 The outlet jet (7) and characterized in that a part of the transported particles follows a conical helical path (9) another part following a substantially linear trajectory, producing a combined effect of scrubbing and brushing on the surface (13) of the material to be cleaned.

 The number of corridors could be other than three, but the number three is the one that gives the best results and the best balance of flows. In addition the corridors meet for the sake of saving material, but it is not mandatory, and they meet before the exit to have a maximum vortex effect.

 Referring now to Figures 3 and 4.

 In this embodiment, the cone (4), the separations (5) and the helical corridors (6) are unchanged, as is the protective layer.

 In the inlet (2) of the nozzle (1 ') is introduced a needle (10) and is glued (or welded) to the edges of the three separations (5).

 The shape of the needle (10) (see Fig. 5) is specially adapted to direct all of the inlet fluid (8 ') into the helical channels and / or to project against the inner wall of the cone (4) to create a maximum gyratory or vortex effect and a jet of the exit fluid (7 ') in which the majority or all of the particles follow a tapered helical path (9') increasing the scrubbing effect on the surface (13) to clean.

 Said needle made of the same material as the separations (5) has a cone-shaped (11) whose apical angle end (a) is directed towards the inlet fluid, said cone (11) being joined by its base to an inverted truncated cone (12).

 Once the needle (10) is in place, the truncated cone (12) is at least partly inside the nozzle in contact with the edges of the three separations, while the cone (11) at least partially exceeds the inlet (2) of the nozzle.

 The conicity (a) of the cone (11) is preferably of the order of 420.

<Desc / Clms Page number 4>

Figure img00040001

By way of nonlimiting example, hereinafter gives dimensions of construction, for a nozzle whose inner diameter of exit is 8 mm: - for the cone (4): H = 85 mm of = 16 mm ds = 8 mm wall thickness approx. 3 mm protection thickness = 1.5 mm for each of the three lanes (6): pitch = 380 mm on Y4 turn on its axis - for the needle (10): ha = 10 mm h2 = 25 mm di = 9 mm

Figure img00040002

d2 = 9.5 mm a = 42 The nozzle can be offered in other dimensions, in particular with inner diameter output of 4 and 6 mm depending on the fineness of the work to be done.

The test results given below illustrate the various possible uses of the invention and their performance, and are given by way of non-limiting examples: nozzle without needle:

Figure img00040003

<Tb>
<tb><SEP> pressure of <SEP> fluid <SEP> of <SEP> cleaning <SEP> (bar) <SEP> 0.5 <SEP> 1 <SEP> 2 <SEP> 3 <SEP> 4
<tb> Distance <SEP> between <SEP> output <SEP> (3) <SEP> from <SEP><SEP> nozzle <SEP> and <SEP> 40 <SEP> 40 <SEP> 40 <SEP> 50 <SEP> 50
<tb> surface <SEP> cleaned <SEP> (cm)
<tb> Number <SEP> of <SEP> turns <SEP> of <SEP> the <SEP> path <SEP> (7) <SEP> 0.5 <SEP> 1 <SEP> 1.25 <SEP> 1. <SEP> 5 <SEP> 1.5
<Tb>

The semi directional jet obtained is particularly used for the stripping of paints on any support, for the cleaning of the supports concrete, stone, metal with a dry cleaning fluid (air + aggregates) adapted to metallic surfaces, or a humid fluid (air + aggregates + water) more suitable for hard stone supports and to avoid the emission of dust.

<Desc / Clms Page number 5>

Figure img00050001

Nozzle with needle:
Figure img00050002

<Tb>
<tb><SEP> Pressure of <SEP> Fluid <SEP> of <SEP> Cleaning <SEP> 0.250 <SEP> 0.500 <SEP> 1 <SEP> 2 <SEP> 3 <SEP> 4
<tb> (bar)
<tb> Distance <SEP> between <SEP> output <SEP> (3) <SEP> from <SEP><SEP> 40 <SEP> 40 <SEP> 40 <SEP> 40 <SEP> 50 <SEP> 50
<tb> nozzle <SEP> and <SEP> surface <SEP> cleaned <SEP> (cm)
<tb> Number <SEP> of <SEP> turns <SEP> of <SEP> the <SEP> path <SEP> 2 <SEP> 2.5 <SEP> 3.5 <SEP> 4 <SEP> 4.5 <SEP> 5
<tb> (7 ')
<Tb>

The results show that the higher the air pressure increases, the more the rotary effect increases, so the more the scrubbing effect on the surface increases.

 This alternative embodiment allows work at lower pressures (from 0.250 to 2 bar) particularly suitable for soft stones, glasses, plastics, hardwoods, ceramics without deterioration of the material.

 For this type of work, a wet fluid (air + granulate + water) is preferably used.

 In both variants, with or without a needle, the mixture is produced upstream of the nozzle (see FIG. 6) itself connected to any existing nozzle support (14) or to a nozzle support according to the invention. comprising means (15) for controlling the mixtures, for example a handle or one or more control buttons.

 The nozzle support (14) is connected by a pipe (16) to a mixing tank (17) in which the granular air mixture is produced at the desired pressure, this pressure being selected from the control (15).

 The aggregate air mixture arrives at the inlet (2) of the nozzle (1 or 1 ') along a linear path in the axis of the nozzle.

 The support of the nozzle (14) further comprises a side water inlet 450 relative to the axis of the nozzle that can be closed or open by the control (15) depending on whether a jet is desired dry or wet.

 The fact of mixing the air and the granulate in a tank and not directly on the nozzle head as in the prior art, allows greater flexibility and greater ease in the adjustment of pressures and avoids plugs in the support (15) and the nozzle (1 or 1 ').

 The user will connect to the support (15), depending on the work to be performed, one or other of the nozzles (1 or 1 ').

 Finally, any known type of granulate may be suitable, in particular calcite with a particle size of between 0.30 and 1.2 which is less aggressive for the support and

<Desc / Clms Page number 6>

Figure img00060001

gives good results thanks to the vortex effect produced by a nozzle according to the invention.

A nozzle according to the invention has many advantages, namely: good quality of cleaning without deterioration of the surface; high proportion of particles in rotation in the outlet jet, or even the whole, by amplification of the rotary effect of the particles; in the channels, - high rotational speed of the particles according to the pressure used - possibility to connect the nozzle to any existing nozzle support, - low cost, - low weight between 20 and 50 g against 400 to 500 g according to models - simple adaptation to any pressure cleaning system, - high cleaning accuracy, - layer-by-layer removal possible without altering the treated surface, - double use: quasi-directional work with low vortexing effect, by simple removal of the needle or brushing with high rotary energy by adding the needle, - dry or wet work, - working at low pressure, - consequent saving of air and water, - soft esse and precision of settings, - environmentally friendly product (no use of chemicals and energy saving), - easy maintenance, by simple change of the nozzle, which becomes a wear part, homogeneous wear of the nozzle.

Claims (10)

 1 / nozzle for cleaning surfaces, for example metal or stone, using a cleaning fluid formed of a mixture of aggregate air and possibly water, conical nozzle whose diameter of the outlet (3) is smaller than the diameter of the inlet (2), the cleaning fluid stream having a conical truncated shape in which at least a portion of the particles of the granulate follow a conical helical path, characterized in that the nozzle is formed mainly of a cone (4) hollow internally comprising helical separations (5) delimiting in the interior volume of the nozzle helical corridors (6) of equal width, and constant width throughout their path from the entrance of nozzle (2) to the nozzle outlet (3).
2 / nozzle according to claim 1 characterized in that the corridors determine on the periphery of the entrance even arcs evenly distributed, departures separations being arranged on a circle concentric with that of the inlet (2) and slightly in diameter greater than that of the outlet (3) so that the corridors meet before the exit (3).
3 / nozzle according to one of claims 1 to 2 characterized in that it comprises three separations (5) and three corridors (6) determining on the
Figure img00070003
 periphery of the entrance, three equal arcs (1 and e2) (e3 e4) (e5 e6) distributed regularly and the departures of the separations being arranged on a concentric circle with that of the entrance (2) so that the three corridors meet a few millimeters before the exit (3).
4 / nozzle according to one of claims 1 to 3 characterized in that it further comprises a needle (10) introduced into the inlet (2) of the nozzle and bonded to the separations (5) whose shape is designed for directing all of the input fluid (8 ') into the channels (6) so as to create a maximum gyratory effect of the particles and an outlet fluid jet (7') in which the majority or all of the particles follow a conical helical path.
5 / nozzle according to the preceding claim characterized in that the needle (10) has a cone-shaped (11) whose tip angle at
<Desc / Clms Page number 8>
 vertex (a) is directed towards the inlet fluid, said cone (11) being joined by its base to an inverted truncated cone (12).
Figure img00080001
6 / nozzle according to the preceding claim characterized in that once set up, the truncated cone (12) is at least partly inside the nozzle in contact with the edges of the three separations, while the cone (11). ) at least partially extends beyond the inlet (2) of the nozzle.
7 / nozzle according to one of claims 5 to 6 characterized in that the conicity (a) of the cone (11) is preferably of the order of 42.
8 / nozzle according to one of claims 1 to 7 characterized in that it is made of ceramic material and in that the cone (4) is externally coated with a semi-flexible protection layer against shocks.
9 / nozzle support-nozzle assembly characterized in that the nozzle is a nozzle according to one of claims 1 to 8 and that it is connected to a nozzle support (14) having a control means (15) mixtures, the nozzle support (14) being connected by a pipe (16) to a mixing tank (17) in which the granular air mixture is produced at the desired pressure, the aggregate air mixture arriving at the inlet (2) of the nozzle (1 or 1 ') along a linear path, in the axis of the nozzle, and that the support of the nozzle (14) further comprising a lateral water inlet at 450 relative to the axis of the nozzle. the nozzle that can be closed or open by the control (15) depending on whether a jet is dry or wet.
10 / Cleaning machine for cleaning surfaces, for example metal or stone, characterized in that it comprises a mixing tank connected to a nozzle-support assembly according to claim
9 and a water supply.
FR0013577A 2000-10-24 2000-10-24 Nozzle with improved rotating effect for the cleaning of surfaces by means of an air-aggregate mixture, dry or wet, support for such a nozzle, and associated cleaning machine Expired - Fee Related FR2815552B1 (en)

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FR0013577A FR2815552B1 (en) 2000-10-24 2000-10-24 Nozzle with improved rotating effect for the cleaning of surfaces by means of an air-aggregate mixture, dry or wet, support for such a nozzle, and associated cleaning machine

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FR0013577A FR2815552B1 (en) 2000-10-24 2000-10-24 Nozzle with improved rotating effect for the cleaning of surfaces by means of an air-aggregate mixture, dry or wet, support for such a nozzle, and associated cleaning machine

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839266A1 (en) * 2002-05-03 2003-11-07 Marc Roussel Mixer, for moving and accelerating waste liquid with or without particulate matter, has rotating collar with conical interior and helicoidal wings inside
WO2009036947A1 (en) * 2007-09-17 2009-03-26 Dieter Wurz Multi-hole or cluster nozzle
CN104588379A (en) * 2015-01-13 2015-05-06 内蒙古包钢钢联股份有限公司 Injection nozzle device for cleaning oxide scales of inner surface of steel pipe
CN109129201A (en) * 2018-09-09 2019-01-04 友联船厂(蛇口)有限公司 A kind of water under high pressure jet stream rust cleaning technique of ship

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1241135A (en) * 1917-03-12 1917-09-25 Ohio Blower Company Burner.
US1442356A (en) * 1920-06-03 1923-01-16 Spray Engineering Co Spray nozzle and method of spraying liquid
US1893210A (en) * 1931-06-22 1933-01-03 Automatic Sprinkler Co Fluid distributing device
US4133485A (en) * 1975-08-27 1979-01-09 Esso Societe Anonyme Francaise Atomizer and uses thereof
GB1571150A (en) * 1976-11-17 1980-07-09 Centre Rech Metallurgique Spraying apparatus
FR2475447A1 (en) * 1980-02-12 1981-08-14 Lizin Alexandr Flash blasted from duroplastic component - using straight and helical air streams and crushed fruit stones
EP0171448A1 (en) 1984-08-14 1986-02-19 Johann Szücs Device and method for cleaning of stone and metal surfaces
US5240183A (en) * 1991-06-06 1993-08-31 Bete Fog Nozzle, Inc. Atomizing spray nozzle for mixing a liquid with a gas
EP0691183A1 (en) * 1994-07-08 1996-01-10 Dr. Hartmann-Kulba Bauchemie GmbH &amp; Co. KG Jet nozzle for use with devices for cleaning especially stone and/or metal surfaces

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1241135A (en) * 1917-03-12 1917-09-25 Ohio Blower Company Burner.
US1442356A (en) * 1920-06-03 1923-01-16 Spray Engineering Co Spray nozzle and method of spraying liquid
US1893210A (en) * 1931-06-22 1933-01-03 Automatic Sprinkler Co Fluid distributing device
US4133485A (en) * 1975-08-27 1979-01-09 Esso Societe Anonyme Francaise Atomizer and uses thereof
GB1571150A (en) * 1976-11-17 1980-07-09 Centre Rech Metallurgique Spraying apparatus
FR2475447A1 (en) * 1980-02-12 1981-08-14 Lizin Alexandr Flash blasted from duroplastic component - using straight and helical air streams and crushed fruit stones
EP0171448A1 (en) 1984-08-14 1986-02-19 Johann Szücs Device and method for cleaning of stone and metal surfaces
US5240183A (en) * 1991-06-06 1993-08-31 Bete Fog Nozzle, Inc. Atomizing spray nozzle for mixing a liquid with a gas
EP0691183A1 (en) * 1994-07-08 1996-01-10 Dr. Hartmann-Kulba Bauchemie GmbH &amp; Co. KG Jet nozzle for use with devices for cleaning especially stone and/or metal surfaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839266A1 (en) * 2002-05-03 2003-11-07 Marc Roussel Mixer, for moving and accelerating waste liquid with or without particulate matter, has rotating collar with conical interior and helicoidal wings inside
WO2009036947A1 (en) * 2007-09-17 2009-03-26 Dieter Wurz Multi-hole or cluster nozzle
US8672241B2 (en) 2007-09-17 2014-03-18 Dieter Wurz Multi-hole or cluster nozzle
CN104588379A (en) * 2015-01-13 2015-05-06 内蒙古包钢钢联股份有限公司 Injection nozzle device for cleaning oxide scales of inner surface of steel pipe
CN109129201A (en) * 2018-09-09 2019-01-04 友联船厂(蛇口)有限公司 A kind of water under high pressure jet stream rust cleaning technique of ship

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