EP3444038A1 - Appareil de pulvérisation et procédé de refroidissement d'une barre métallique dans une machine de coulée continue - Google Patents

Appareil de pulvérisation et procédé de refroidissement d'une barre métallique dans une machine de coulée continue Download PDF

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Publication number
EP3444038A1
EP3444038A1 EP18188503.9A EP18188503A EP3444038A1 EP 3444038 A1 EP3444038 A1 EP 3444038A1 EP 18188503 A EP18188503 A EP 18188503A EP 3444038 A1 EP3444038 A1 EP 3444038A1
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EP
European Patent Office
Prior art keywords
nozzle
nozzles
spray liquid
spray
switching valve
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
Application number
EP18188503.9A
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German (de)
English (en)
Inventor
Siegfried Foshag
Jürgen Frick
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.)
Lechler GmbH
Original Assignee
Lechler GmbH
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Filing date
Publication date
Application filed by Lechler GmbH filed Critical Lechler GmbH
Publication of EP3444038A1 publication Critical patent/EP3444038A1/fr
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B05B12/04—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for sequential operation or multiple outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
    • 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
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/20—Arrangements of several outlets along elongated bodies, e.g. perforated pipes or troughs, e.g. spray booms; Outlet elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/3053—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a solenoid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe

Definitions

  • the invention relates to a spray gun and a method for cooling a metallic strand in a continuous casting machine.
  • a method for cooling a metallic strand in a continuous casting machine in which a spray jet is applied to a metallic strand by means of a plurality of spray nozzles.
  • the spray nozzles are designed for a maximum amount of water to be applied and, in order to reduce the spray liquid quantity, intermittently acted upon by switching valves.
  • the spray nozzles are permanently operated intermittently. Due to the intermittent action on the metallic strand, its cooling does not necessarily take place continuously.
  • a spray gun and a method for cooling a metallic strand in a continuous casting machine are to be improved.
  • a spray apparatus for cooling a metallic strand in a continuous casting machine in which at least one multi-nozzle head and at least one switching valve are provided, wherein the multi-nozzle head has at least a first and a second nozzle and wherein the switching valve is arranged upstream of the multi-nozzle head, wherein the Switching valve is in fluid communication with all the second nozzles in the multi-nozzle head, to enable or block a supply of spray liquid to all the second nozzle.
  • a plurality of multi-nozzle heads are provided and the multi-nozzle heads are spatially spaced from each other.
  • a variation of the dispensed spray liquid quantity is achieved by switching on or off of nozzles in the multi-nozzle heads.
  • nozzles in the multi-nozzle heads are designed and arranged so that each nozzle alone and any combination of nozzles each cause a uniform spray liquid distribution over the width of the metallic strand and thus a homogeneous cooling of the strand. This is achieved inter alia by overlapping the spray jets of the nozzles.
  • the switching valves can be designed, for example, as pneumatic switching valves and, for example, controlled by the amount of pressure of a supplied compressed air. For example, if in each case three nozzles are present in the multi-nozzle heads, the then existing two or three switching valves can then be designed so that at a first pressure, for example 6 bar, only the first nozzles are supplied with spray liquid. If the pressure of the supplied compressed air is then lowered, for example to 3 bar, the switching valves open not only for the first nozzles but also for the second nozzles, so that spray liquid is then discharged from the first nozzles and the second nozzles.
  • a first pressure for example 6 bar
  • the switching valves open not only for the first nozzles but also for the second nozzles, so that spray liquid is then discharged from the first nozzles and the second nozzles.
  • a control of the switching valves can also be carried out electrically or electronically, for example by using solenoid valves as switching valves.
  • the dispensed spray liquid quantities can be varied. A variation of the dispensed spray liquid quantity can then take place on the one hand via the pressure of the supplied spray liquid and on the other via the connection or disconnection of individual nozzles in the multi-nozzle heads. As a result, a very large variation range of the amount of spray liquid of, for example, 1:15 can be achieved.
  • the first nozzle can be permanently supplied with spray liquid or the first nozzle can also be assigned a switching valve.
  • the switching valves can be designed so that nozzles in which the spray water supply is shut off, permanently or partially flushed with compressed air, to prevent deposits and contamination in nozzles and pipes.
  • the switching valves can be provided for this purpose with a branch for the compressed air and optionally a throttle for the compressed air in the branch.
  • Each multi-nozzle head may be provided with one or more switching valves or multiple multi-nozzle heads are associated with one or more switching valves.
  • each multi-nozzle head has n nozzles, wherein all the second nozzles and optionally all third, fourth to n-th nozzles are each in flow communication with a switching valve to supply a spray liquid to all second nozzles and optionally all third, fourth to nth nozzles to release or lock, where n is a natural number and has a value between 2 and 10.
  • the number of nozzles in the multi-nozzle heads is in principle arbitrary, where n advantageously equal to 3, so that in each multi-nozzle nozzle three nozzles are present and a first switching valve all first nozzles, a second switching valve all second nozzles and a third switching valve all third nozzles assigned. Particularly advantageous values for n are between 2 and 10.
  • the first switching valve can be omitted if the first nozzles are to be permanently supplied with spray liquid.
  • At least a first pipe and a second pipe for supplying spray liquid are provided, wherein the first pipe is connected to all first nozzles and the second pipe to all second nozzles.
  • the first switching valve may be upstream of the multi-nozzle heads on the first pipeline and the second switching valve may be provided upstream of the multi-nozzle heads on the second pipeline.
  • a very space-saving design of the spray apparatus according to the invention can be achieved.
  • the nozzles for cooling a metallic strand usually have to be arranged between support rollers for the metallic strand, so that there is usually very little space for the arrangement of the nozzles available.
  • Another significant advantage of common piping is that only one single switching valve needs to be assigned to each pipeline. The design effort can be significantly reduced.
  • the first pipe can be permanently supplied with spray liquid, so that can be omitted in this case, the first switching valve. If n nozzles are provided in each multi-nozzle head, there are also n pipelines, wherein in each case one pipeline is assigned to all first, second, third and n-th nozzles.
  • a switching valve is provided upstream of the multi-nozzle heads on the second pipeline and optionally on the third, fourth to n-th pipeline, wherein a n is a natural number and has a value between 2 and 10. Also on the first pipe upstream of the multiple nozzle heads, a switching valve may be provided.
  • n 3, so that three pipes and three nozzles are provided in all multi-nozzle heads. At least two of the three lines is in each case assigned a switching valve, so that a spray liquid supply through the first pipe is either permanently released or shut off or released by the first switching valve, a spray liquid supply can be shut off or released by the second pipe through the second switching valve and a spray liquid supply can be shut off or released by the third pipe by means of the third switching valve. If a switching valve is present in the first pipeline, all first nozzles in the multi-nozzle heads can thus be switched on or off together, as can all second nozzles or all third nozzles in the multi-nozzle heads. Particularly advantageous values for n are between 2 and 10.
  • the nozzles of at least one multi-nozzle head are different in that they each output a different amount of spray liquid at a predefined pressure of the spray liquid.
  • the nozzles of a multi-nozzle head with respect to the dispensed spray liquid quantity are coordinated so that the first nozzle within a predefined pressure range between a low pressure and a high pressure of the spray liquid dispenses a spray liquid within a first amount range and that the amount range of the sum the amount of spray liquid discharged from the first nozzle and the second nozzle between the low pressure and the high pressure overlaps the first amount range.
  • the second tonnage area defined by the spray liquid amount output from the first nozzle and the second nozzle in common between the low pressure and the high pressure overlaps the first tonnage area at least at the high pressure.
  • each multi-nozzle nozzle n nozzles where appropriate, the first to third nozzle, the first to fourth nozzle or the first to n-th nozzle within a predefined pressure range between a low pressure and a high pressure of the spray liquid a spray liquid within a output the third, fourth or nth quantity range and the quantity ranges overlap.
  • n is advantageously equal to 3, with further advantageous values of n lying between 2 and 10.
  • the second quantity range and the third quantity range thus overlap, as do the third and fourth or (n-1) th and n-th quantity ranges.
  • the multi-nozzle heads are arranged spatially spaced from each other along the pipes.
  • the pipes run parallel to each other.
  • the pipelines run parallel to a casting direction of the continuous casting machine and the multiple nozzle heads are arranged one behind the other along the pipelines in the casting direction.
  • a variation of the width can be achieved by switching off individual spray guns, which is acted upon by the spray guns according to the invention, according to the just cast strand width of the metallic strand.
  • the pipes are arranged transversely to a casting direction of the continuous casting machine and the multiple nozzle heads are arranged transversely to the casting direction behind the other along the pipes.
  • the switching valves are designed as compressed air valves and each switching valve is associated with a solenoid valve for enabling or shutting off a compressed air supply to a respective switching valve.
  • a plurality of solenoid valves are combined in a solenoid valve island, wherein the solenoid valve island has a common base and a common electronic control for the solenoid valves.
  • the solenoid valve island or the common electronic control of the solenoid valve island may be suitable for connection to a data bus, so that a very simple electronic wiring can be achieved.
  • At least one of the pipes is formed as a profile with at least one continuous hollow chamber in the longitudinal direction of the profile.
  • an extruded or extruded profile can be used, which consists for example of aluminum, brass or steel, especially stainless steel.
  • the pipelines can be made very stable and, for example, the profiles can already provide mounting options for the multi-nozzle heads.
  • a plurality of pipes are formed by means of a profile with a plurality of longitudinally continuous hollow chambers.
  • the multi-nozzle heads are arranged on the profile or on the carrier having a plurality of profiles.
  • the pipelines can be formed by forming a carrier thereby simultaneously as mechanically bearing parts.
  • the problem underlying the invention is also solved by a method for cooling a metallic strand in a continuous casting machine having a spraying device according to the invention, wherein the steps of releasing a spraying liquid supply and / or switching off a spraying liquid supply to all first nozzles, all second nozzles and / or all n-th nozzles of the multi-nozzle heads are provided in response to a required amount of spray liquid, wherein the release and / or shutdown of the spray liquid supply is carried out exclusively with a change in the required spray liquid quantity.
  • the presentation of the Fig. 1 shows a spray gun 10 according to the invention, which is intended for the arrangement in a continuous casting machine, in which a metallic strand is produced.
  • a casting direction of the metallic strand is shown by an arrow 12.
  • the casting direction 12 corresponds to the feed direction of the metallic strand.
  • the metallic strand of liquid steel is poured and then transported between support rollers in the direction of the arrow 12.
  • the spray gun according to the invention is then arranged above the metallic strand, a further spray gun 10 according to the invention can be arranged below the metallic strand in order to be able to cool it from the top side and the bottom side.
  • a plurality of spray devices 10 according to the invention can be arranged next to one another in order, for example, to be able to cool even very wide metallic strands over their entire surface.
  • the spray apparatus 10 has a nozzle carrier 14 which extends parallel to the casting direction 12.
  • a plurality of multi-nozzle units 16 are arranged, which in the Fig. 2 will be explained in more detail.
  • a total of five multi-nozzle units 16 are arranged on the nozzle carrier 14.
  • three multiple nozzle units 16 are arranged on the right side of the nozzle carrier 14 and two multiple nozzle units 16 on the left side of the nozzle carrier 14 , This arrangement is merely exemplary and can be chosen essentially arbitrarily.
  • the multi-nozzle units 16 may be permanently connected to the carrier 14 or releasably connected to the carrier 14.
  • the nozzle carrier 14 is arranged in a continuous casting machine above the support rollers for the metallic strand.
  • the multiple nozzle units 16 then extend downwardly from the nozzle carrier 14, into Fig. 1 So into the drawing level, so that the Spray nozzles can then be arranged for example between the support rollers for the metallic strand.
  • a first pipe 18 a, a second pipe 20 a and a third pipe 22 a are provided which extend parallel to each other and parallel to the nozzle carrier 14.
  • the first pipe 18a is shown by a solid line, the second pipe 20a by a broken line, and the third pipe 22a by a dot-dash line. This is for illustrative purposes only and to distinguish the three pipes 18a, 20a, 22a.
  • Each multi-nozzle unit 16 has three spray nozzles, which are each acted upon by separate nozzle water pipes. To do this in the schematic representation of Fig. 1 to show, three nozzle water pipes 18b, 20b and 22b are shown in each multi-nozzle unit 16.
  • the nozzle water pipes 18b of all multi-nozzle units 16 are connected via short branch lines to the pipe 18a.
  • the nozzle water pipes 20b of all the multi-nozzle units 16 are connected to the second pipe 20a via short stubs, and the nozzle water pipes 22b of all the multi-nozzle units 16 are connected to the third pipe 22a via short stubs.
  • the stubs can be omitted.
  • a nozzle valve block 24 is provided with a total of three switching valves 26, 28 and 30.
  • the first switching valve 26 is connected to the first pipe 18a
  • the second switching valve 28 is connected to the second pipe 20a
  • the third switching valve 30 is connected to the third pipe 22a.
  • a spray liquid supply for example, a water supply, which is symbolized by an arrow 32, are released or shut off to the pipes 18a, 20a, 22a.
  • the switching valves 26, 28, 30 are advantageously designed as pneumatically actuated pinch valves.
  • a pneumatic control of the switching valves 26, 28, 30 takes place by means of a respective solenoid valve, which are arranged in a solenoid valve island 34, which is shown above the nozzle valve block 24.
  • This solenoid valve island 34 is, as symbolized by an arrow 36, supplied compressed air.
  • the solenoid valve island 34 has a common electronic control that can be connected to a data bus. Such a data bus and thus the supply of electrical signals is symbolized by means of an arrow 38.
  • the first switching valve 26 can be omitted if the first pipe 18a and thus all the first nozzles of the multi-nozzle units 16 are to be permanently supplied with spray liquid.
  • a higher-level device for switching on and off the spray water supply for the entire spray gun 10 may of course still be provided.
  • solenoid valves Depending on how the solenoid valves are actuated in the solenoid valve island 34, they release a compressed air supply to the switching valves 26, 28, 30 or block the compressed air supply, and as a result, a spray liquid supply to the pipes 18a, 20a, 22a is either released or blocked.
  • Fig. 2 shows a schematic representation of a multi-nozzle unit 16.
  • Each multi-nozzle unit 16 has a mounting block 40, in each of which the beginning of the nozzle water pipes 18b, 20b and 22b is arranged.
  • the nozzle water pipes 18b, 20b, 22b then lead through a carrier 42 to a multi-nozzle head 44.
  • three nozzles 46, 48, 50 are provided, each having a in Fig. 2 can produce schematically indicated spray. If all three nozzles 46, 48, 50 are in operation, then the spray jets of the nozzles 46, 48, 50 overlap.
  • the multi-nozzle unit 16 is permanently or detachably connected to the carrier 14.
  • the multi-nozzle head 44 is designed so compact that it can be arranged between two support rollers for the metallic strand. In any case, the multi-nozzle head 44 is formed and arranged so that the spray jets generated by the nozzles 46, 48, 50 can pass unhindered between the support rollers.
  • the first nozzle 46 is supplied with spraying liquid by means of the first nozzle water pipe 18b
  • the second nozzle 48 is supplied with spraying liquid by means of the second nozzle water pipe 20b
  • the third nozzle 50 is supplied with spraying liquid by means of the third nozzle water pipe 22b.
  • first switching valve 26 By means of the first switching valve 26 can thus be released or shut off a spray liquid supply to all first nozzles 46 in the multi-nozzle units 16.
  • second switching valve 28 By means of the second switching valve 28, a spray liquid supply to all second nozzles 48 in the multi-nozzle units 16 can be enabled or shut off.
  • third switching valve 30 By means of the third switching valve 30, a spray liquid supply to all third nozzles 50 of the multi-nozzle units 16 can be released or shut off.
  • a change in the amount of spray liquid dispensed can thus take place, on the one hand, by a change in the pressure of the supplied spray liquid, on the other hand by switching on or off the nozzles 46, 48, 50.
  • the nozzles 46, 48, 50 produce a continuous and not interrupted spray.
  • cooling of the metallic strand can also be continuous and without interruption.
  • the first nozzles 46, the second nozzles 48 and the third nozzles 50 in each multi-nozzle head 44 may be identical or designed so that they spend a different spray liquid quantity at the same spray liquid pressure.
  • the first nozzle 46 outputs a first spray liquid quantity at a predetermined spray liquid pressure
  • the second nozzle 48 outputs a larger spray liquid volume at the same spray liquid pressure
  • the third nozzle 50 dispenses an even larger spray liquid quantity at the same spray liquid pressure.
  • the nozzles 46, 48, 50 may be formed in the multi-nozzle block 44, for example, as nozzle inserts, so that these nozzle inserts can be changed quickly and easily. This is advantageous if the nozzles 46, 48, 50 must be replaced because of wear, but also to adjust the amount of spray liquid dispensed.
  • Fig. 3 represents a diagram in which the dispensed spray liquid quantity in liters per minute is plotted against the water pressure of the spray liquid.
  • a first lined line shows the amount of spray liquid dispensed by the first nozzles 46 above the water pressure.
  • a second, cross-lined line shows the sum of the amount of spray liquid dispensed by the first nozzle 46 and the second nozzle 48.
  • a third squared line shows the sum of the amount of spray liquid dispensed by all three nozzles 46, 48, 50.
  • the second nozzle 48 is switched on. At the same time the spray liquid pressure is reduced again to 1 bar.
  • the sum of the amount of spray liquid dispensed by the first nozzle 46 and the second nozzle 48 at 1 bar spray liquid pressure is about 2 l / min. This value is thus lower than the amount of spray liquid dispensed by the first nozzle 46 alone at a spray liquid pressure of 12 bar.
  • the amount ranges of the spray liquid discharged from the first nozzle 46 alone and the spray liquid amount output from the first nozzle 46 and the second nozzle 48 thus overlap. This makes it possible to achieve a very precise adjustment of the dispensed spray liquid quantity by varying the spray liquid pressure and by switching on or off individual nozzles 46, 48, 50.
  • the first nozzle 46 and the second nozzle 48 together give about 7.5 l / min of spray liquid, as can be seen on the right-hand side with the cross-hatched line. Should then increase the spray liquid quantity even further are all three nozzles 46, 48, 50 supplied with spray liquid and at the same time the spray liquid pressure is reduced back to 1 bar. As indicated by the squares line in Fig. 3 can be seen, all three nozzles 46, 48, 50 together at a spray liquid pressure of 1 bar, a spray liquid amount of about 6 l / min.
  • an increase in the amount of spray liquid can be done not only in the manner described, but it can be switched on or off at other spray liquid pressures nozzle to within the diagram of Fig. 3 to be able to set the desired amount of spray agent.
  • the nozzles 46, 48, 50 of the multi-nozzle heads 44 are so coordinated with respect to the dispensed spray liquid quantity that the first nozzle within a predefined pressure range between a low pressure and a high pressure of the spray liquid dispenses a spray liquid quantity within a first amount range, and the sum of the amount of spray liquid discharged from the first nozzle and the second nozzle at the low pressure is lower than the amount of the spray liquid discharged from the first nozzle at the high pressure.
  • Fig. 4 schematically shows the carrier 14 of Fig. 1 in a front view.
  • the carrier 14 is formed by a profile 52 having three longitudinally continuous hollow chambers. These three hollow chambers form the pipes 18a, 20a and 22a, to which, as has been explained, the branch lines to the multi-nozzle units 16 or directly the multi-nozzle unit 16 are connected.
  • undercut grooves 54, 56 are arranged laterally of the three hollow chambers or pipes 18a, 20a, 22a. These undercut grooves 54, 56 can be used for mounting, for example, the multi-nozzle units 16 on the carrier 14.
  • the Carrier 42 of the Fig. 2 which combines the three nozzle water pipes 18b, 20b, 22b may be formed in the same or similar manner as a profile 52 having a plurality of hollow chambers.
  • Fig. 5 shows a schematic representation of a spray device 60 according to the invention according to another embodiment.
  • the spray gun 60 has a multi-nozzle unit 16, as already described with reference to the Fig. 2 has been described.
  • the multi-nozzle unit 16 will therefore not be described again.
  • a nozzle valve block 24 with a total of three switching valves 26, 28 and 30 is arranged, which is already based on the spray device of Fig. 1 was explained.
  • the first switching valve 26 is associated with a first nozzle water pipe 18b
  • the second switching valve 28 is associated with a second nozzle water pipe 20b
  • the third switching valve 30 is associated with a third nozzle water pipe 22b.
  • a spray liquid supply to the nozzle valve block 24, a compressed air supply to the nozzle valve block 24 and an optionally superior solenoid valve island are in Fig. 5 for the sake of clarity not shown but in an identical manner as in Fig. 1 provided and related to Fig. 1 described.
  • the spray gun 60 of the invention Fig. 5 thus has only a multiple nozzle unit 16.
  • a plurality of spray guns 60 in an arrangement similar to the Fig. 1 be combined.
  • Several sprayers 60 are then provided for cooling a metallic strand.
  • the individual multi-nozzle units 16 are driven separately from each other.
EP18188503.9A 2017-08-18 2018-08-10 Appareil de pulvérisation et procédé de refroidissement d'une barre métallique dans une machine de coulée continue Pending EP3444038A1 (fr)

Applications Claiming Priority (1)

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DE102017214450.5A DE102017214450B3 (de) 2017-08-18 2017-08-18 Spritzapparat und Verfahren zum Kühlen eines metallischen Strangs in einer Stranggießmaschine

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US (1) US10807157B2 (fr)
EP (1) EP3444038A1 (fr)
JP (1) JP6673991B2 (fr)
KR (1) KR102224689B1 (fr)
CN (1) CN109396370B (fr)
BR (1) BR102018016766B1 (fr)
CA (1) CA3012932C (fr)
DE (1) DE102017214450B3 (fr)
RU (1) RU2706937C1 (fr)
UA (1) UA122515C2 (fr)

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Publication number Priority date Publication date Assignee Title
WO2021024920A1 (fr) * 2019-08-02 2021-02-11 Ｊｆｅスチール株式会社 Dispositif de refroidissement secondaire de brame coulée en continu et procédé de refroidissement secondaire
CN110842164A (zh) * 2019-11-26 2020-02-28 张家港宏昌钢板有限公司 一种可调节连铸二冷水系统
IT202000010903A1 (it) * 2020-05-13 2021-11-13 Danieli Off Mecc Metodo di controllo di un apparato di raffreddamento secondario in una macchina per colata continua di prodotti metallici
IT202000010909A1 (it) 2020-05-13 2021-11-13 Danieli Off Mecc Apparato di raffreddamento secondario in una macchina per colata continua di prodotti metallici
CN112605954A (zh) * 2020-11-12 2021-04-06 广东韶钢工程技术有限公司 一种喷淋架的快速检修装置
DE102022206953A1 (de) * 2022-07-07 2024-01-18 Sms Group Gmbh Strangführungsvorrichtung und Verfahren für deren Umrüstung

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JPS5747560A (en) * 1980-09-02 1982-03-18 Nippon Steel Corp Gas-liquid cooler for continuous casting
JPS6149760A (ja) * 1984-08-15 1986-03-11 Nippon Kokan Kk <Nkk> 連続鋳造鋳片の二次冷却方法
GB2322573A (en) * 1997-02-28 1998-09-02 Silsoe Research Inst Spray nozzle arrangement
US7181822B2 (en) * 2005-01-20 2007-02-27 Nucor Corporation Method and apparatus for controlling strip shape in hot rolling mills
WO2017042059A1 (fr) * 2015-09-07 2017-03-16 Primetals Technologies Austria GmbH Refroidissement secondaire d'une barre de coulée continue dans une installation de coulée continue

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US3727673A (en) * 1968-02-27 1973-04-17 Steel Corp Roller cage for confining continuous casting as it emerges from mold
US3885741A (en) * 1971-10-27 1975-05-27 Demag Ag Apparatus for cooling metal webs
JPS48645U (fr) 1972-05-15 1973-01-08
JPS5741864A (en) 1980-08-26 1982-03-09 Nippon Steel Corp Secondary cooling method in continuous casting
JPS62502389A (ja) 1985-04-03 1987-09-17 カ−ジンスキイ、カス・ア−ル 鋼連続鋳造装置及び方法
SU1773552A1 (ru) * 1989-06-14 1992-11-07 Vni Pk I Metall Mash Cпocoб oxлaждehия зaгotobok пpи heпpepыbhoй paзлиbke
JPH0480645U (fr) * 1990-11-27 1992-07-14
JP2007253202A (ja) 2006-03-24 2007-10-04 Jfe Steel Kk 連続鋳造機の鋳片二次冷却装置
EP2527061A1 (fr) 2011-05-27 2012-11-28 Siemens VAI Metals Technologies GmbH Procédé de refroidissement d'un faisceau métallique et vanne de commande pour l'ouverture et la fermeture intermittentes d'un flux volumique d'un fluide de refroidissement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247047A (en) * 1979-01-15 1981-01-27 Schaming Edward J Modular zoned digital coolant control system for strip mill rolls
JPS5747560A (en) * 1980-09-02 1982-03-18 Nippon Steel Corp Gas-liquid cooler for continuous casting
JPS6149760A (ja) * 1984-08-15 1986-03-11 Nippon Kokan Kk <Nkk> 連続鋳造鋳片の二次冷却方法
GB2322573A (en) * 1997-02-28 1998-09-02 Silsoe Research Inst Spray nozzle arrangement
US7181822B2 (en) * 2005-01-20 2007-02-27 Nucor Corporation Method and apparatus for controlling strip shape in hot rolling mills
WO2017042059A1 (fr) * 2015-09-07 2017-03-16 Primetals Technologies Austria GmbH Refroidissement secondaire d'une barre de coulée continue dans une installation de coulée continue

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CA3012932A1 (fr) 2019-02-18
RU2706937C1 (ru) 2019-11-21
UA122515C2 (uk) 2020-11-25
DE102017214450B3 (de) 2018-11-29
KR20190019879A (ko) 2019-02-27
JP6673991B2 (ja) 2020-04-01
BR102018016766A2 (pt) 2019-03-26
CN109396370B (zh) 2021-06-29
KR102224689B1 (ko) 2021-03-08
JP2019034342A (ja) 2019-03-07
US10807157B2 (en) 2020-10-20
US20190054520A1 (en) 2019-02-21
CA3012932C (fr) 2021-04-06
CN109396370A (zh) 2019-03-01
BR102018016766B1 (pt) 2022-12-27

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