EP4140592A1 - Dispositif buse et son procédé de fabrication - Google Patents
Dispositif buse et son procédé de fabrication Download PDFInfo
- Publication number
- EP4140592A1 EP4140592A1 EP22184474.9A EP22184474A EP4140592A1 EP 4140592 A1 EP4140592 A1 EP 4140592A1 EP 22184474 A EP22184474 A EP 22184474A EP 4140592 A1 EP4140592 A1 EP 4140592A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle device
- nozzle
- blow
- flat product
- jet
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000003570 air Substances 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 9
- 238000010146 3D printing Methods 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000012080 ambient air Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 230000001154 acute effect Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 73
- 239000000839 emulsion Substances 0.000 description 20
- 210000002414 leg Anatomy 0.000 description 11
- 210000000689 upper leg Anatomy 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 5
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
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
- B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
Definitions
- the invention relates to a nozzle device for drying and cleaning the edge area of a flat product, in particular a metal sheet or strip.
- the present invention also relates to a method for their production.
- the dryness of flat products is an important quality criterion for their customers, especially when it comes to a cold-rolled flat product as the end product.
- Cold rolling usually uses fluids that have a positive effect on the rolling process; this can be emulsions or rolling oils etc. These fluids must be removed from the surface of the flat product after the rolling process. This is traditionally done with the help of what is known as a dry strip system, or DS system for short. To do this, the DS system seals the gap between the work roll and an upper deflector table with a Coanda nozzle without contact and generates an air flow that encloses the flat product and ensures that the flat product is largely free of residual emulsion. Due to the strong deflection of the air flow in the area of the edges of the flat product, however, it can happen that residual emulsion droplets can be found in the edge area of the flat product.
- a first variant of the additional edge blow-off device is an edge blow-off that can be switched into zones.
- Compressed air nozzles are located close to the roll gap, which are intended to prevent emulsion from getting through the roll gap from the inlet to the outlet side of a roll stand and wetting the edge of the flat product.
- the blow-off nozzles can be switched on or off in different zones, depending on the width of the flat product.
- the additional edge blow-off device essentially consists of compressed air nozzles that can be moved in the width direction of the flat product with the aid of an electric or pneumatic motor and can thus be adapted to the current width of the flat product.
- this second variant can usually only be installed further back in the outlet area of a (cold) rolling stand for rolling the flat product.
- the third variant of the additional edge blow-off device is a modification of the second variant. In the third variant, however, there is no separate actuator for moving the edge blow-off. Instead, the pressure nozzles are moved together with the lateral guide in the outlet of a roll stand.
- edge blow-off device Despite the additional edge blow-off device, problems still occur more frequently in the edge area of flat products, namely when the edge blow-off device either does not remove the residual emulsion at the edges in a process-stable manner or when the emulsion is initially removed from the edge of the Flat product is removed, but is then deflected at another point in the outlet area of the roll stand, which has rolled the flat product, and wets the surface of the flat product again. This leads to residual emulsion droplets on the surface of the flat product, which impairs its quality as an end product.
- the above-mentioned first variant of the switchable blow-off device which is designed to be switchable in individual zones, has the disadvantage that the blower nozzles cannot always be adjusted to the current bandwidth.
- the blower nozzles cannot always be adjusted to the current bandwidth.
- the compressed air nozzles of the additional edge blow-off device cannot apply enough force in the area of the edge of the flat product and the residual emulsion can therefore not be optimally removed from the edge of the flat product there.
- the effect 1) does not occur as pronounced, since there the DS system simultaneously generates an air flow away from the top of the flat product.
- a nozzle device according to the preamble of patent claim 1 is known. Specifically, this document discloses a device for removing moisture from an edge area of a metal strip.
- the device is C-shaped for passing the edge portion of a band.
- nozzle assemblies are provided in both an upper leg of the C-shaped housing and a lower leg of the C-shaped housing for discharging pressurized air onto the lower and upper surfaces of the edge portion of the strip to be dried, the air being directed toward directed to the edge of the belt to remove any moisture present on the belt.
- a suction pipe which is connected to a vacuum generating device for sucking off the air in the edge region of the strip to be dried.
- the air can do it Contain drops of moisture blown off the surface of the strip by the nozzle assemblies.
- the device is housed in a housing. The housing can be moved towards or away from the strip or flat product with the aid of an electric motor.
- FIG 7 A known possibility for the realization of a vacuum generating device is in figure 7 represented in the form of a classic Venturi nozzle.
- compressed air is first introduced into ejector A. Due to the narrowing of the cross-section of the driving nozzle, the so-called Venturi nozzle B, the compressed air that is introduced is accelerated. The dynamic pressure increases, at the same time the static pressure in the air decreases. After passing the propulsion nozzle, the accelerated air expands again and a vacuum is created. Due to the vacuum, the air is "sucked” through the vacuum connection D into the ejector. The compressed air exits the ejector through the silencer C together with the "sucked” air.
- the general advantages of using a Venturi nozzle are that these vacuum generators are particularly suitable for very high accelerations of the compressed air fed into ejector A.
- the invention is based on the object of further developing a known nozzle device and a known method for its production such that the nozzle device is structurally simplified and the method becomes more efficient.
- nozzle device is integrated with the two legs, the flank part and the at least two blow-off nozzles by being additively manufactured.
- the term "oblique” does not mean perpendicular to the flat product, but at an acute angle with at least one component opposite to the direction of movement of the flat product relative to the nozzle device, and preferably also in the direction of the edge of the flat product.
- the nozzle device is equally suitable for removing liquid, ie for drying and/or cleaning dirt from the edge area of the flat product. If in the following only drying or only cleaning is mentioned, this only applies as an example.
- the claimed flank part via which the upper and lower legs are connected to one another, advantageously ensures that the cavity spanned by the nozzle device is shielded from the rest of the environment of the nozzle device and thus ensures that the Drops of emulsion detached from the surface of the flat product do not leave the nozzle device.
- the claimed integral manufacture of the nozzle i. H. the additive manufacturing of the nozzle device using 3D printing enables the integration of various components or functions within the nozzle device.
- the integrated production means that in particular all feed lines to the compressed air chambers and the upper and lower blow-off nozzle can be designed in such a way that a flow-optimized, uniform and energy-saving flow for the first medium with which the primary nozzle is operated and the second medium with which the at least one secondary nozzle is operated is reached.
- other pneumatic elements such as throttles, valves, etc. can also be integrated into the 3D-printed nozzle device.
- nozzle device provision is made for secondary nozzles to be formed, preferably on both sides adjacent to the primary nozzle, in order to emit a secondary jet running parallel to the primary jet onto the surface of the flat product.
- the secondary jet serves to stabilize the primary jet and thus promotes effective drying or cleaning of the flat product.
- the secondary nozzles in the claimed nozzle device are advantageously designed in such a way that, together with an optimized outer contour of the respective leg in which the secondary nozzles are arranged, they use the Coanda effect and the outflowing media, in particular the outflowing compressed air, ambient air in the vicinity of the respective which entrains the shank, increasing the volume flow of the secondary jets many times over and at the same time reducing the energy requirement.
- the primary nozzle and the secondary nozzles can be operated with a first medium or a second medium, which are different.
- the first medium and the second medium are preferably the same and more preferably each is air.
- flank part serves to delimit the cavity spanned by the nozzle device on one side. This advantageously prevents the air enriched with the liquid or the impurities from being released into the environment in an uncontrolled manner.
- the nozzle device according to the invention has at least one suction device in which negative pressure is generated and which has at least one suction opening for sucking in and sucking off the liquid or the emulsion droplets blown off the edge of the flat product.
- the suction device with its at least one suction opening is also integrated as part of the nozzle device by additive manufacturing in this nozzle device, typically in the flank part.
- the suction device is preferably integrated into the flank part of the nozzle device with its suction opening in the form of a Venturi nozzle, which is open towards the interior of the cavity spanned by the C-shaped nozzle device.
- the suction openings are preferably located halfway between the upper and lower legs, more preferably in the direction of flight of the drop of emulsion detached from the edge of the flat product.
- Said design of the suction device as a Venturi nozzle causes the formation of negative pressure at the suction openings and in this way the first and/or second medium, ie preferably the air of the primary jet and the secondary jet together with the detached droplets of emulsion contained therein are sucked in by the suction openings and transported away in a controlled manner in the suction device.
- the large C-shaped configuration of the nozzle device shields the separation area, ie the spatial area into which the liquid reaches after being blown off the flat product, so that the liquid does not reach the outside of the nozzle device.
- a drainage opening is arranged in the transition area between the flank part and the upper side of the lower leg.
- the underside of the upper leg and/or the top side of the lower leg are designed to be inclined towards the flank part, in particular towards the drain opening.
- the inclination is designed in such a way that the liquid can flow off due to gravity along the underside of the upper leg and/or the upper side of the lower leg in the direction of the drain opening.
- the provision of the inclination also prevents drops of the liquid from collecting on these surfaces within the cavity spanned by the nozzle device, which drops could otherwise drip or fall back onto the surface of the flat product.
- the invention is advantageously positioned with the aid of actuators on the current edges of the flat product to be cleaned.
- the flat product can be dried effectively and in an energy-saving manner.
- the nozzle device is advantageously housed in a metal cage.
- the nozzle device according to the invention is preferably manufactured in one piece, integrated additively, i. H. manufactured using the 3D printing process. Alternatively, however, it is also possible to produce the nozzle device according to the invention in individual segments, which in turn are each then manufactured additively.
- This segmented design offers the advantage that in the event of any damage to the nozzle device, e.g. B. in the case of a crack in the flat product, only the defective segment has to be replaced.
- the part of the nozzle device that is typically located above the flat product to be cleaned in such a way that it is held in position with a safety coupling. In this case, the upper part of the nozzle device would be flexible in the event of a tear in the flat product and could then fold away upwards and suffer no major damage.
- FIG. 1 shows the nozzle device according to the invention in a perspective view.
- the nozzle device 100 is C-shaped with an upper leg 110-o and a lower leg 110-u, both of which are connected to one another via a flank part 120 for passing through an edge region of a flat product 200 to be cleaned.
- a drain opening 160 is formed on the upper side of the lower leg 110-u for draining residual liquid that was not collected and sucked off with a suction device 140, which will be described later.
- the cavity 300 spanned by the two legs 110-o and 110-u and the flank part 120 is typically filled with air, which is enriched with liquid droplets blown off the flat product. So that these liquid droplets in the air (aerosols) do not accumulate on the underside of the upper leg 110-o and from there fall back onto the edge area of the flat product to be dried, the underside of the upper leg and/or the upper side of the lower leg are facing the Flank portion 120 and in particular towards the drain opening 160, formed inclined.
- the present invention provides for the nozzle device 100 to be integrated with the two legs 100-o, 110-u, with the flank part 120 and with the two blow-off nozzles 130-o, 130-u, by being additively manufactured.
- figure 2 shows a longitudinal section through the nozzle device 100, wherein in the upper leg 110-o at least one upper blow-off nozzle 130-o directed obliquely towards the upper side of the edge region of the flat product is arranged for emitting a first blow-off jet 134, 137.
- the first blow-off jet serves to discharge liquid accumulated on the top of the flat product towards the edge of the edge area of the flat product.
- a lower blow-off nozzle 130-u is arranged in the lower leg 110-u of the nozzle device 100 and is directed obliquely towards the underside of the edge area of the specialist product to be dried.
- the lower blow-off nozzle 130-u is used to emit a second blow-off jet and to discharge liquid on the underside of the flat product to be dried with the second blow-off jet towards the edge of the edge region of the flat product 200.
- suction device 140 In figure 2 are also three suction openings 142 in one in figure 2 Suction device 140 not shown in detail can be seen.
- the suction device generates a negative pressure that is present at the suction openings 142 for sucking in and sucking off the air in the cavity 300 with the liquid blown off the edge of the flat product.
- a more detailed description of the suction device 140 follows below with reference to FIG Figures 5 and 6 .
- figure 3 first shows the configuration of the upper blow-off nozzle 130-o in detail.
- the lower blow-off nozzle 130-u in the lower leg 110-u is designed analogously.
- the upper or lower blow-off nozzle 130-o, 130-u is preferred also integrated in the nozzle device, initially in the form of a primary nozzle 132 which is in fluid-conducting connection to a pressure chamber 133 integrated in the upper and/or lower leg.
- the primary nozzle 132 is used to emit a primary jet 134, preferably at an acute angle onto the top or bottom of the flat product.
- the primary jet is formed from a first medium.
- At least one secondary nozzle 136 is also configured in the upper and/or lower blow-off nozzle, preferably on both sides adjacent to the primary nozzle 132, for emitting a secondary jet 137 running parallel to the primary jet 132, also at a preferably acute angle onto the surface of the flat product.
- the secondary beam 137 typically serves to stabilize the primary beam 134.
- the secondary beam is formed from a second medium, which may or may not be different from the first medium.
- the first and second media are the same and typically both are air.
- the primary nozzle 132 and the secondary nozzles 137 are preferably each in the form of slot nozzles. In particular, in the case of slot nozzles, the primary nozzle and the secondary nozzle are arranged parallel to one another.
- the primary jet and the secondary jets which are typically two adjacent on both sides, together form the blow-off jet of the nozzle device 100.
- the secondary nozzles 136 are connected via a channel 138 integrated in the respective leg 110-o, 110-u, each with air intake openings 139 on the outside of the respective leg 110-o , 110-u in a fluid-conducting connection for sucking in ambient air to form the secondary jets 137.
- the outer contours of the legs 110-o, 110-u in the area of the air intake openings 139 are each designed in such a way that in the area of the Air intake openings 139 of the Coanda effect occurs.
- FIG. 12 illustrates the operation of the nozzle device 100 according to the invention, in the left figure in a plan view and in the right figure in a cross-sectional view. It can be seen in both figures that in each case a plurality of blow-off nozzles 130-o are arranged parallel next to one another in each leg of the nozzle device 100. It can also be seen that the first or upper blow-off jets 134, 137 they generate are aligned with a first component counter to the direction of movement or counter to the transport direction of the flat product to be dried and with a second component preferably at the same time towards the edge of the flat product .
- suction openings 142 for sucking in and sucking off the residual liquid blown off the edge of the flat product.
- the suction openings 142 are arranged halfway between the upper and lower legs 110-o, 110-u, i.e. in the target area of the blow-off jets after they have hit the top and bottom of the flat product to be dried in a horizontal direction on the Flank part 120 of the nozzle device 100 were derived.
- the Figures 5 and 6 show the design of the suction device 140 according to the invention integrated into the flank part 120.
- the suction device is integrated in the form of a Venturi nozzle or a plurality of Venturi nozzles connected in parallel, i.e. in the 3D printing process in the flank part 120 educated. With the aid of the well-known principle of the Venturi nozzle, a negative pressure is generated at the suction openings 142 for sucking in and sucking off the liquid blown off the edge of the flat product.
- the nozzle device according to the invention is made of plastic, preferably made of thermoplastic material in an integrated manner.
Landscapes
- Nozzles (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021209265.9A DE102021209265A1 (de) | 2021-08-24 | 2021-08-24 | Düsenvorrichtung und Verfahren zu deren Herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4140592A1 true EP4140592A1 (fr) | 2023-03-01 |
Family
ID=82458790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22184474.9A Pending EP4140592A1 (fr) | 2021-08-24 | 2022-07-12 | Dispositif buse et son procédé de fabrication |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4140592A1 (fr) |
| DE (1) | DE102021209265A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024240648A1 (fr) * | 2023-05-19 | 2024-11-28 | Sms Group Gmbh | Dispositif de projection thermique, procédé de fabrication d'un tel dispositif et utilisation d'un procédé de fabrication additive |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2050046A (en) * | 1935-01-21 | 1936-08-04 | American Steel & Wire Co | Cold-rolling steel strip |
| EP0610300B1 (fr) | 1991-11-01 | 1996-05-15 | DAVY McKEE (POOLE) LIMITED | Elimination de l'humidite presente sur une bande metallique |
| KR20100006932U (ko) * | 2008-12-29 | 2010-07-08 | 코카콜라음료 주식회사 | 해충유입방지기와 이를 이용한 이송장치 및 음료공급장치 |
| US20190076856A1 (en) * | 2015-12-29 | 2019-03-14 | Arcelormittal | Air Nozzle for Guiding a Steel Strip at the Exit from a Device for Shearing a Steel Sheet |
-
2021
- 2021-08-24 DE DE102021209265.9A patent/DE102021209265A1/de active Pending
-
2022
- 2022-07-12 EP EP22184474.9A patent/EP4140592A1/fr active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2050046A (en) * | 1935-01-21 | 1936-08-04 | American Steel & Wire Co | Cold-rolling steel strip |
| EP0610300B1 (fr) | 1991-11-01 | 1996-05-15 | DAVY McKEE (POOLE) LIMITED | Elimination de l'humidite presente sur une bande metallique |
| DE69210835T2 (de) | 1991-11-01 | 1996-09-26 | Davy Mckee Poole | Entfernung von feuchtigkeit von einem metallband |
| KR20100006932U (ko) * | 2008-12-29 | 2010-07-08 | 코카콜라음료 주식회사 | 해충유입방지기와 이를 이용한 이송장치 및 음료공급장치 |
| US20190076856A1 (en) * | 2015-12-29 | 2019-03-14 | Arcelormittal | Air Nozzle for Guiding a Steel Strip at the Exit from a Device for Shearing a Steel Sheet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024240648A1 (fr) * | 2023-05-19 | 2024-11-28 | Sms Group Gmbh | Dispositif de projection thermique, procédé de fabrication d'un tel dispositif et utilisation d'un procédé de fabrication additive |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021209265A1 (de) | 2023-03-02 |
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Owner name: SMS GROUP GMBH |