EP3741462A1 - Zerlegbare zerstäuberöffnung oder -düse - Google Patents

Zerlegbare zerstäuberöffnung oder -düse Download PDF

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Publication number
EP3741462A1
EP3741462A1 EP20175917.2A EP20175917A EP3741462A1 EP 3741462 A1 EP3741462 A1 EP 3741462A1 EP 20175917 A EP20175917 A EP 20175917A EP 3741462 A1 EP3741462 A1 EP 3741462A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
hollow body
inner chamber
main
cylindrical surface
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
Application number
EP20175917.2A
Other languages
English (en)
French (fr)
Other versions
EP3741462B1 (de
Inventor
Federico Tonini
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.)
PNR Italia Srl
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PNR Italia Srl
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Filing date
Publication date
Application filed by PNR Italia Srl filed Critical PNR Italia Srl
Publication of EP3741462A1 publication Critical patent/EP3741462A1/de
Application granted granted Critical
Publication of EP3741462B1 publication Critical patent/EP3741462B1/de
Active legal-status Critical Current
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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
    • B05B1/3431—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 being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3447—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 being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a cylinder having the same axis as the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge

Definitions

  • the present invention belongs to the field of dispensing atomized fluids for the purposes of cooling, in particular, for cooling fabricated metal products obtained by continuous casting.
  • the present invention relates to an atomizer nozzle adapted to cool fabricated metal products, such as billets and/or the like during the solidification step defined as continuous casting.
  • an innovative mouth or nozzle adapted to be used for cooling fabricated metal products of the aforesaid type forms the subject of the present invention.
  • a mouth or nozzle of the aforesaid type adapted to be dismantled into several parts and thus facilitate maintenance, in particular, the cleaning of said several parts, forms the subject of the present invention.
  • a system for dispensing atomized fluids also forms the subject of the present invention, said system comprising an innovative nozzle of the aforesaid type.
  • the principle of the continuous casting method is that of continuously casting liquid steel, turning it into solid bars after cooling and relative solidification.
  • Various semi-finished products such as slabs, blooms and billets are distinguished according to the dimensions reached by the bar, which semi-finished products are destined, in turn, for successive processing to obtain a finished iron and steel product.
  • continuous casting can be defined as an industrial production process, by means of which liquid material is pushed, by gravitational force, into an ingot mold (usually made of copper alloy) with the object of obtaining manufactured products having a predefined shape depending on the needs.
  • One of the main advantages offered by the continuous casting method is that of allowing the production, with contained costs and times, of finished section bars of a suitable shape adapted to allow the further processing thereof, for example, by means of rolling mills roughers and finishing rolling mills.
  • a container which is also coated with a refractory material, the tundish, designed to receive the jet (casting) of molten steel from the ladle.
  • the main task of the tundish is to keep an iron shutter - constant static, i.e. to ensure a regular outflow of the steel; in the case of several casting lines, the flow of steel is equally distributed among the various ingot molds.
  • the quality of the product is checked during the first steps of solidification, which take place in the ingot mold, a die made of copper alloy with forced water cooling, provided with an oscillating motion generated by a machine called an oscillator.
  • the heat is disposed of in the ingot mold mainly by the cooling water in forced circulation, wherein said cooling by means of water in forced circulation, and thus of the steel in the ingot mold, results in the formation of a solid film, called a skin or shell, the thickness of which increases along the ingot mold until reaching even about 3 cm.
  • the material positioned more internally in the ingot mold remains liquid or semi-solid (mushing zone) for many meters along the casting descent path, wherein the state thereof depends on the casting speed and the thickness of the line.
  • the casting line with a partially solid bar (on the outside) and a partially liquid bar (on the inside), leaves the ingot mold and descends into the curved section.
  • the time spent in the ingot mold is generally less than one minute.
  • the thickness of the skin depends on the shape and size of the bar cross-section and for such requirements, the casting speed, i.e. the line advancing speed, varies from 0.5-1.8 m/min for slabs to 2-5 m/min for billets.
  • the reason why the bar isn't cooled completely inside the ingot mold can be attributed to the fact that during the cooling the skin contracts (solidification shrinkage), wherein the ingot mold (bar)-line contact is lost, thus reducing the transmission efficiency of the heat (and thus of the cooling) due to the presence of a layer of air, which is interposed between the walls made of copper alloy of the ingot mold and the solid shell of the newly formed bar.
  • the bars are further cooled during the curved descent path thereof with biphasic atomizers (liquid - gas), which allow a regular and uniform cooling along the whole perimeter of the bar.
  • the first cooling systems were made exclusively of water nozzles, whereas the use of an atomized fluid by means of special nozzles or mouths, called atomizers, has recently been introduced.
  • An atomizer is formed by an atomizer body and an atomizer nozzle.
  • the two fluids liquid and gas
  • the atomizer body or main pipe
  • the high-speed gas causes the fragmentation thereof into tiny drops, a process defined as atomization.
  • the atomizer nozzle has the function of generating the desired distribution and form of the outgoing flow or jet.
  • the correct quality of the spray or jet understood as the quantity and distribution of the water supplied is indispensable for determining a correct cooling speed of the steel.
  • the main problem with this kind of nozzles according to the prior art is represented by the fact that the swirling member, also defined by the term swirling insert, tends to block, wherein the blockage of the swirling insert results in the interruption of the supply of the atomized cooling fluid.
  • said swirling insert positioned inside the atomizer nozzle, blocks easily due to the debris present in the re-circulating water of the system, which ends up blocking the narrow passages of said swirling insert.
  • atomizer nozzles of the known type do not allow easy maintenance because in order to carry out maintenance (cleaning) of the nozzles of the known type, the same must be completely removed from the cooling line.
  • nozzles of the known type a further drawback found in nozzles of the known type is represented by the fact that internal cleaning of said nozzles of the known type is nonetheless complicated and dispersive in terms of time, because nozzles of the known type cannot be dismantled, in particular, the orifice mouth thereof not being separable, wherein, on the contrary, the removal of the orifice mouth would allow access inside the nozzle, and thus improved cleaning of the nozzle.
  • the atomizer nozzles used to-date are made in a single piece formed by a nozzle body and a swirling insert placed internally, assembled so as to make them integral, the nozzle body being fixed directly to the atomizer body or main pipe by means of a threaded connection.
  • the main object of the present invention is to overcome, or at least partially reduce the problems summarized above and affecting atomizer nozzles according to the prior art.
  • the present invention basically arises from the need, highlighted above, according to which it is indispensable to develop an atomizer nozzle with a convenient system for dismantling the orifice mouth thereof.
  • an atomizer nozzle made up of separate pieces, which can easily be dismantled, is proposed and realized, wherein the dismantling of the orifice mouth has been conceived to favor the cleaning of the critical parts, subject to clogging, which are adapted to mix and atomize fluids, from any solid particles present in the process fluids, ensuring optimum working of the atomizer nozzle.
  • the atomizer device described and proposed herein comprises a first element, otherwise also known as a nozzle body, formed by an outer coat, provided with a connection, which allows the fixing thereof to a main pipe or fitting, otherwise called an atomizer body.
  • the swirling insert is accommodated and fixed inside the nozzle body.
  • a second element or body otherwise known as nozzle orifice (or orifice mouth) is fixed to the nozzle body, defining therein a swirling chamber specifically designed to atomize the outgoing spray.
  • the present invention relates to an atomizer nozzle (100) for dispensing an atomized fluid, said nozzle (100) comprising a first main hollow body (200) defining a first inner chamber (2000), said first main hollow body (200) comprising fixing means adapted to allow said first main hollow body (200) to be fixed to a main pipe or fitting (500), wherein, with said first main hollow body (200) fixed to said main pipe or fitting (500), said first inner chamber (2000) is in communication with introduction means of said main pipe or fitting (500), for introducing at least one liquid and at least one gas into said first inner chamber (2000), wherein said nozzle (100) comprises a diffuser insert (400) accommodated in said first inner chamber (2000); wherein said nozzle (100) comprises a second minor hollow body (300) defining a second inner chamber (3000) and adapted
  • said first inner chamber (2000) comprises a first portion (2001) radially delimited by a first substantially cylindrical surface (2010), on which a first inner thread (2011) is obtained, wherein, with said first main hollow body (200) fixed to said main pipe or fitting (500), said first portion (2001) is positioned between said diffuser element (400) and said dispensing orifice (311), wherein said second minor hollow body (300) comprises an engaging portion (301) radially delimited by a second outer cylindrical engaging surface (3010) on which a second outer thread (3011) is obtained, and wherein said second minor hollow body (300) is adapted to be removably fixed to said first main hollow body (200) by mutual engagement by screwing said first inner thread (2011) and second outer thread (3011).
  • said first main hollow body (200) comprises an engaging portion (201) radially delimited by a third outer cylindrical engaging surface (2020) on which a third outer thread (2021) is obtained, wherein said first main hollow body (200) is adapted to be removably fixed to said main pipe or fitting (500) by mutual engagement by screwing said third outer thread (2021) and a corresponding thread of said main pipe or fitting (500).
  • said diffuser element (400) is cylindrical in shape and comprises a first circular surface (4001) and a second circular surface (4002) which are opposite to each other and connected by a fourth outer cylindrical surface (4010).
  • said diffuser element (400) comprises a plurality of outer helical grooves (4011), each extending from said fourth outer cylindrical surface (4010) towards the inside of said diffuser element.
  • said first inner chamber (2000) comprises a second portion (2002) radially delimited by a fifth substantially cylindrical surface (2050) and a third portion (2003) radially delimited by a sixth cylindrical surface (2060), wherein said fifth cylindrical surface (2050) and sixth cylindrical surface (2060) are mutually joined by a circular crown-shaped connecting shoulder (2130), and wherein said connecting shoulder (2130) is engaged by a circular crown-shaped portion of said second circular surface (4002) of said diffuser element (400).
  • said first inner chamber (2000) comprises a fourth portion (2004) radially delimited by a seventh substantially cylindrical surface (2070), wherein said seventh cylindrical surface (2070) and fifth cylindrical surface (2050) are mutually joined by a second circular crown-shaped connecting shoulder (2110), and wherein with said first main hollow body (200) fixed to said main pipe or fitting (500), said fourth portion (2004) is positioned upstream of said diffuser element (400) with respect to said dispensing orifice (311).
  • said first portion (2001) of said first inner chamber (2000) is shaped so as to define a circular crown-shaped engaging shoulder (2200), wherein with said second minor hollow body (300) fixed to said first main hollow body (200), said engaging shoulder (2200) is engaged by a corresponding engaging surface (3019) of said engaging portion (301) of said second minor hollow body (300).
  • said second inner chamber (3000) comprises a fifth portion (3005) radially delimited by an eighth substantially cylindrical surface (3080), wherein with said second minor hollow body (300) fixed to said first main hollow body (200), said fifth portion (3005) is positioned downstream of said diffuser element (400) with respect to said dispensing orifice (311).
  • said corresponding engaging surface (3019) of said engaging portion (301) of said second minor hollow body (300) is circular crown-shaped, wherein said eighth cylindrical surface (3080) of said second minor hollow body (300) extends from said corresponding circular crown-shaped engaging surface (3019) downstream of said corresponding circular crown-shaped engaging surface (3019) with respect to said diffuser element (400), with said second minor hollow body (300) being fixed to said first main hollow body (200).
  • said second inner chamber (3000) comprises a sixth portion (3006) radially delimited by a ninth substantially truncated-cone surface (3090), which extends from said eighth cylindrical surface (3080) towards said dispensing nozzle (311) with a decreasing diameter towards said dispensing nozzle (311).
  • said second inner chamber (3000) comprises a seventh portion (3007) radially delimited by a tenth substantially cylindrical surface (3100), which extends from said sixth truncated-cone portion (3006) towards said dispensing orifice (311).
  • said dispensing orifice (311) is radially delimited by an eleventh substantially truncated-cone inner surface (3111), which extends from said tenth substantially cylindrical surface (3100) towards the outside of said second minor hollow body (300) with an increasing diameter towards the outside of said second minor hollow body (300).
  • An atomizer system for atomizing a liquid and delivering an atomized fluid further forms the subject of the present invention, said system comprising at least one main pipe or fitting (500) and a nozzle (100) for dispensing said atomized fluid, which are mutually connected, wherein said nozzle (100) defines at least one swirling chamber (310) and comprises at least one dispensing orifice (311) for dispensing said atomized fluid, and wherein said pipe or fitting (500) comprises means for introducing at least one liquid and at least one gas into said at least one swirling chamber (310) of said nozzle (100), wherein said nozzle (100) is a nozzle according to one of the previously summarized embodiments.
  • said main pipe or fitting (500) is shaped to define a pre-chamber (5001) in which said means for introducing said at least one liquid and said at least one gas converge, wherein, with said first main hollow body (200) of said nozzle (100) being connected to said main pipe or fitting (500), said pre-chamber (5001) is in communication with said first inner chamber (2000) of said first main hollow body (200).
  • the disassemblable nozzle according to the embodiment of the present invention depicted therein is identified by the reference numeral 100 and, as depicted, can be applied to a main pipe or fitting 500 (also called “air-water atomizer") provided with means (not shown in detail) for introducing at least one liquid (usually water) and at least one gas (usually air) into the nozzle 100.
  • a main pipe or fitting 500 also called “air-water atomizer”
  • means not shown in detail
  • the nozzle 100 comprises a first main hollow body (also called nozzle body) 200, which, in turn, comprises a substantially cylindrical engaging portion 2020 provided externally with a connecting thread 2021 adapted to allow the body 200 to be fixed to the fitting or atomizer body 500 by means of mutual engagement by screwing said outer thread 2021 and a corresponding thread (not shown) of said main pipe or fitting 500.
  • a first main hollow body (also called nozzle body) 200 which, in turn, comprises a substantially cylindrical engaging portion 2020 provided externally with a connecting thread 2021 adapted to allow the body 200 to be fixed to the fitting or atomizer body 500 by means of mutual engagement by screwing said outer thread 2021 and a corresponding thread (not shown) of said main pipe or fitting 500.
  • the hollow body (see the following description) further has a second portion joined to and opposite to said substantially cylindrical engaging portion 202, with exception of flat portions 203 provided to facilitate the fixing and disassembling of the atomizer body 500 by screwing and unscrewing, respectively.
  • the main body 200 is internally hollow, and defines, in particular, an inner cavity 2000, wherein, with the body 200 fixed to the atomizer body according to the previously described procedures, said at least one liquid and at least one gas, are introduced into the inner chamber or cavity 2000 in the flow direction indicated in figure 8 by the arrow F1.
  • the main chamber 2000 has a first portion 2001 radially delimited by a cylindrical surface 2010, a second portion 2002 radially delimited by a cylindrical surface 2050, a third portion 2003 radially delimited by a cylindrical surface 2060, and a fourth portion 2004 radially delimited by a cylindrical surface 2070, said portions being mutually communicating, thus defining the inner chamber 2000.
  • the diameters of the first, second, third and fourth portions vary, defining supporting or engaging shoulders for accommodating further component parts of the nozzle 100.
  • the diameter of the second portion 2002 is smaller than that of the fourth portion 2004, wherein said second portion and fourth portion are mutually joined by a circular crown-shaped connecting shoulder 2110.
  • the diameter of the third portion 2003 is smaller than that of the second portion 2002, wherein said third and second portion are joined by a connecting and engaging shoulder 2130, which is also circular crown-shaped.
  • the diameter of the first portion 2001 is smaller than the diameter of the third portion 2003, thus, wherein said first portion 2001 and third portion 2003 are joined by a further circular crown-shaped connecting and engaging shoulder 2200.
  • a thread 2011 is obtained on the inner wall 2010 adapted to be engaged by screwing by a corresponding thread 3011 of a second hollow body (also called orifice body) 300 forming part of the nozzle 100 and described in detail below.
  • said second hollow body 300 defines an outer cavity or chamber 3000 and comprises an engaging portion 301 radially delimited on the outside by a cylindrical surface 3010 on which said outer thread 3011 is obtained.
  • the mutual progressive screwing of the threads 3011 and 2011 results in the progressive insertion of the engaging portion 301 in the first portion 2001 of the main chamber 2000 of the body 200 as shown in figure 4 , from which it can also be seen that, with the hollow body 300 fixed to the hollow body 200 according to the previously described procedures, the end surface 3019 (circular crown-shaped) of the engaging portion 301 of the body 300 is placed in abutment (and thus in engagement) against the circular crown-shaped shoulder 2200 of the body 200, thus ensuring the seal between the body 200 and the body 300, preventing liquids and/or gas from leaking or escaping.
  • the inner chamber 3000 of the body 300 is put in communication with the inner chamber 2000 of the body 200, defining a common swirling chamber 310 of the nozzle 100.
  • the chamber 300 also comprises different portions, in other words, a portion 3005 radially delimited by a substantially cylindrical surface 3080, a portion 3006, which extends from the portion 3005 and is radially delimited by a truncated-cone shaped surface 3090 with a decreasing diameter away from the portion 3005, a portion 3007, which extends from the truncated-cone shaped portion 3006 and is radially delimited by a cylindrical surface 3100, and finally, a truncated-cone shaped dispensing orifice 311 radially delimited by a surface 3111 and which extends from the portion 3006 to the exterior of the body 300, the orifice having opposite conicity to that of the portion 3006, and thus with an increasing diameter towards the exterior of the body 300.
  • the nozzle 100 comprises a diffuser insert 400 ( figure 6 ) designed to be accommodated in the hollow body 200 ( figures 4 and 59), said diffuser insert 400 having a substantially cylindrical shape, being longitudinally delimited by two opposite circular surfaces 4001 and respectively 4002, which are joined to each other by an outer cylindrical surface 4010, wherein the diffuser 400 comprises a plurality of outer grooves with a helical development 4011, each extending from said outer cylindrical surface 4010 towards the inside of said diffuser element and thus wherein each groove opens out into an opening on the surface 4001 and into a second opposite opening on the surface 4002.
  • the diffuser 400 depicted with the nozzle 100 completely assembled, is accommodated in the second portion 2002 of the chamber 2000 (of the body 200) with the outer surface 4010 in contrast with the inner surface 2050 of the portion 2002, wherein a circular crown-shaped outer peripheral portion of the surface 4002 is placed in abutment against the shoulder 2110, which, as anticipated, joins the portions 2002 and 2004 of the chamber 2000.
  • the portion 2004 has the function of a pre-chamber, wherein said at least one liquid and at least one gas, introduced into said pre-chamber 2004 take a swirling motion, due to the diffuser 400, which favors the atomization, wherein the atomized flow is dispensed through the orifice 311 as indicated by the arrow F2.
  • the steps of assembling the nozzle comprising the positioning of the diffuser 400 in the body 200, the fixing of the body 300 to the body 200 and the fixing of the body 200 (and thus of the entire nozzle 100) to the fitting 500.
  • the body 200, with the diffuser 400 positioned therein can be fixed to the fitting 500 before the body 300 is fixed to the body 200.

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  • Nozzles (AREA)
  • Medicines Containing Plant Substances (AREA)
EP20175917.2A 2019-05-24 2020-05-21 Zerlegbare zerstäuberöffnung oder -düse Active EP3741462B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000007190A IT201900007190A1 (it) 2019-05-24 2019-05-24 Ugello o bocchello atomizzatore smontabile

Publications (2)

Publication Number Publication Date
EP3741462A1 true EP3741462A1 (de) 2020-11-25
EP3741462B1 EP3741462B1 (de) 2023-03-08

Family

ID=68234054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20175917.2A Active EP3741462B1 (de) 2019-05-24 2020-05-21 Zerlegbare zerstäuberöffnung oder -düse

Country Status (2)

Country Link
EP (1) EP3741462B1 (de)
IT (1) IT201900007190A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH197705A (fr) * 1937-06-09 1938-05-15 Arnold Michoud Dispositif pulvérisateur de liquide.
EP0611933A2 (de) * 1993-02-17 1994-08-24 Air Products And Chemicals, Inc. Gefrierverfahren und -vorrichtung
US20010004692A1 (en) * 1999-12-15 2001-06-21 Asahi Kogaku Kogyo Kabushiki Kaisha Endoscopic spraying instrument
EP3395449A1 (de) * 2017-04-28 2018-10-31 Universidad De Alcalá De Henares Zerstäubungsdüse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH197705A (fr) * 1937-06-09 1938-05-15 Arnold Michoud Dispositif pulvérisateur de liquide.
EP0611933A2 (de) * 1993-02-17 1994-08-24 Air Products And Chemicals, Inc. Gefrierverfahren und -vorrichtung
US20010004692A1 (en) * 1999-12-15 2001-06-21 Asahi Kogaku Kogyo Kabushiki Kaisha Endoscopic spraying instrument
EP3395449A1 (de) * 2017-04-28 2018-10-31 Universidad De Alcalá De Henares Zerstäubungsdüse

Also Published As

Publication number Publication date
EP3741462B1 (de) 2023-03-08
IT201900007190A1 (it) 2020-11-24

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