EP3519116A1 - Ramp for spraying a lubricating and/or refrigerating fluid - Google Patents
Ramp for spraying a lubricating and/or refrigerating fluidInfo
- Publication number
- EP3519116A1 EP3519116A1 EP17780506.6A EP17780506A EP3519116A1 EP 3519116 A1 EP3519116 A1 EP 3519116A1 EP 17780506 A EP17780506 A EP 17780506A EP 3519116 A1 EP3519116 A1 EP 3519116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- orifices
- wall
- nozzles
- shaft
- ramp
- 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
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 49
- 230000001050 lubricating effect Effects 0.000 title claims description 9
- 238000005507 spraying Methods 0.000 title description 4
- 239000007921 spray Substances 0.000 claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims description 43
- 238000005192 partition Methods 0.000 claims description 33
- 238000001816 cooling Methods 0.000 claims description 15
- 238000003754 machining Methods 0.000 claims description 13
- 239000012809 cooling fluid Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 19
- 238000009826 distribution Methods 0.000 description 14
- 239000000498 cooling water Substances 0.000 description 9
- 238000005259 measurement Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000005068 cooling lubricant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
-
- 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
- B05B1/16—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 having selectively- effective outlets
- B05B1/1627—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 having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
- B05B1/1672—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 having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock the selectively-effective outlets being arranged on a tube or pipe
-
- 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
- B05B1/3006—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 controlling element being actuated by the pressure of the fluid to be sprayed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
Definitions
- the invention relates to a ramp for spraying a lubricating fluid and / or refrigerant, and a mill equipped with such a ramp.
- the field of the invention is that of rolling mills for metal band, and more particularly a rolling mill known to those skilled in the art under the name "High".
- a rolling mill taught by US 2,776,586, comprises a cage inside which rolling rolls are arranged.
- the rolling rolls comprise two working rolls defining the gap of the strip to be rolled, and a set of first intermediate rolls and a set of intermediate second rolls for supporting each work roll (lower and upper). These rolling rolls are supported by several sets of rollers bearing on the second intermediate rolls, on either side of the plane of the strip to be rolled.
- the first intermediate cylinders are two in number, and said second intermediate cylinders are three in number (for each working cylinder, upper or lower). Eight sets of rollers are supported on the second intermediate cylinders, on either side of the plane of the strip to be rolled.
- These ramps extend over the width of the strip to be rolled, in the roll stand, at an inter-space between the upper intermediate rolls, on the one hand, and the lower intermediate rolls, on the other hand. These ramps are classically positioned near the work rolls.
- Such rolling mills typically comprise two pairs of ramps, the two ramps of each pair being disposed respectively below and above the plane of the strip to be rolled. The two pairs ramps are conventionally arranged on either side of the rolling plane passing through the axes of the working rolls.
- Each of the spray booms may be pivotally articulated to the cage, to allow adjustment of the position of the ramp relative to the band, or relative to the cylinders nearby. This adjustment is effected by rotation of the ramp around its pivot axis, substantially parallel to the plane of the strip and perpendicular to the running direction of the strip.
- each ramp has a rotation shaft, mounted free of rotation, at its ends, in bearings integral with the cage.
- a hydraulic cylinder, connecting the cage and the shaft, makes it possible to rotate the boom and then firmly hold the boom in the desired position.
- the different possible positions of the ramps can, in particular, facilitate the removal of the cylinders, by removing the ramp or the cylinder to change.
- the different positions can also facilitate the insertion of the strip between the working rolls.
- the ramps of the upstream pair, according to the insertion direction of the strip can be brought closer to one another in order to physically guide the end of the strip to be introduced at the level of the air gap of the working rolls, the ramps of the other pair can be spaced to facilitate the recovery of the band, downstream of the work rolls.
- the supply of the cooling fluid ramp is provided from the ends of the rotation shaft of the ramp, which is hollow (cylindrical tubular), over its entire length, and so that the hollow of the shaft constitutes a fluid inlet chamber.
- a frame typically welded, generally planar, is secured by welding to the hollow shaft, extending along the length of the shaft, parallel to its longitudinal axis. This frame serves as support for nozzles, regularly distributed over the length of the frame. These nozzles are arranged on this frame with respect to each other and so as to allow the formation of a curtain of fluid. This curtain is intended to water the strip and / or rollers over their entire width / length.
- each of the nozzles is supplied with fluid from the hollow of the shaft constituting the admission chamber, via a plurality of individual pipes, each individual pipe opening, on the one hand, at one of its ends, in the hollow of the shaft, through an orifice made in the cylindrical wall of the shaft, and secondly, in the level of a tapped bore on which the nozzle is secured by screwing.
- the curtain of fluid generated by the ramp must sweep the element along its entire length / width, and at a uniform flow rate on this element. length Width.
- the flow rates of the different nozzles are not identical.
- the respective flow rates of the different nozzles depend essentially on the positions of the nozzles along the length of the ramp. For example, and if the tubular shaft were supplied with fluid from only one of its two ends, the flow profile of the nozzles would be increasing, ie the flow rates of the nozzles would increase as one moved further away from the nozzle. feed end of the hollow shaft. In practice, such a supply from one end only of the hollow shaft is not practiced in that it generates non-acceptable flow rate variations.
- the intake chamber is thus supplied with cooling fluid simultaneously from both ends of the tubular shaft, and at similar pressures and flow rates at both ends: flow rate variations are thus obtained. limited, acceptable cooling band.
- Feeding each hollow shaft simultaneously from these two ends thus requires a fluid supply system, on each side of the roll stand, and in particular at the access door of the rolling mill, on the operator side by which the different cylinders can be extracted during maintenance. According to the findings of the inventor, this supply system on this side of the mill encumbers this maintenance access.
- JP 2011 194417 A is also known from a cooling apparatus used in the rolling of steel.
- Such apparatus includes a supply pipe connected to a nozzle carrier frame, having an inner pipe and an outer pipe, the cooling water supply pipe being connected to the inner pipe.
- the cooling water supplied to the inner pipe passes through holes formed on its upper face and ends up in the outer pipe before being sprayed externally via the nozzle group.
- Such a device has the disadvantage of not guaranteeing a uniformity of the optimum pressure at the outlet of the nozzles, in the longitudinal direction of the nozzle carrier frame, the nozzle carrier having only one pressure uniformization chamber . Moreover, the maintenance of such a device proves tedious, in that the inner pipe, and in particular the holes on its upper face, are not accessible from outside the nozzle carrier frame.
- JP S62 3203 U also known from JP S62 3203 U is a cooling device employed on a rolling mill.
- a cooling device employed on a rolling mill.
- Such a device comprises a supply pipe, a plurality of nozzles, fixed on a plate, itself attached to the supply pipe, and communicating with it through holes.
- Said plate is in the form of a square section tube and defines a chamber between the supply pipe and the nozzles.
- Such a device has the drawback of not guaranteeing a uniformity of the optimum pressure at the outlet of the nozzles, in the longitudinal direction of the nozzle carrier frame, the plate having only one pressure uniformization chamber.
- JP 2013 013937 A discloses a cooling device intended for cooling steel after a rolling process.
- a device cooling comprises a supply pipe, provided with an opening, through which cooling water is conveyed, the other end being closed by a plate.
- a plurality of holes are formed on the peripheral surface of the pipe, and evenly distributed in a longitudinal direction of said pipe. The diameter of the holes is provided decreasing in the longitudinal direction of the pipe, from the feed plate to the plate, in order to equalize the feed rates through the different holes in the longitudinal direction of the pipe.
- Such a cooling device also comprises a collector surrounding the pipe, externally to said pipe.
- the collector is a tubular piece of square section, whose side faces are closed by plates.
- a slotted nozzle is provided within the manifold, and a rectifier is disposed within said slotted nozzle.
- the upper portion of said nozzle feed extends above the upper face of the collector.
- a first discharge port is provided on an upper face of the collector, near the nozzle.
- a cover plate of substantially parallelepiped shape, covers the first discharge port and the power port. Said cover forms a cooling water flow channel connecting the discharge port and the power port.
- a second discharge port of the same size as the first discharge port is provided on the upper wall of the manifold on the other side of the split nozzle.
- a cooling water flow path is formed and the nozzle is permanently embedded in the cooling water, even when the pipe is not supplied with cooling water.
- the nozzle is therefore not subject to the heating induced by the passage of hot metal strip, which may deform and therefore adversely affect the uniformity of the pressure of the cooling water in a longitudinal direction of the nozzle.
- the object of the present invention is to provide a spray boom to overcome the aforementioned drawbacks.
- Another object of the present invention is to provide such an easy maintenance ramp.
- the invention relates to a spray boom for lubricating and / or cooling a rolled strip and / or pressure rolls of a rolling mill, comprising:
- a plurality of nozzles distributed over the length of the chassis and carried by the chassis, arranged in such a way that the jets form a curtain of fluid, a channeling system, internal to said chassis, supplying the nozzles with power from through orifices formed in the tubular wall of the hollow shaft, said pipe system comprising two pressure uniformization chambers.
- the frame comprises a top wall, a bottom wall, two side walls sealingly integral with the outer wall of the shaft, and an end wall carrying bores for plurality. of nozzles, said walls of the frame forming with the outer wall of the tubular shaft a box, a partition separates the internal volume of the box into said two pressure uniformization chambers, in series in the direction of fluid flow, s extending each the entire active length of the frame, and through which passes successively all of the fluid supplying said plurality of nozzles, including:
- first pressure equalization chamber defined between said partition and the outer wall of the shaft carrying the orifices, called first orifices
- second pressure equalization chamber defined between said partition and the end wall.
- the partition carries orifices said second orifices distributed over the entire length of the partition.
- the number of nozzles of the plurality of nozzles is an integer N, the number of first orifices and the number of second orifices being each equal to N, each orifice of a nozzle being aligned with one of the first orifices and one of the second orifices, in a direction of alignment substantially perpendicular to the axis of the shaft, and so as to allow the cleaning of these three orifices by the insertion of the same rectilinear tool traversing simultaneously these three openings in the alignment direction.
- the machining of said first orifices is inclined with respect to the direction of alignment so that each of the jets at the outlet of the orifices is directed against a solid wall of the first uniformization chamber such as the partition,
- machining of said second orifices of the intermediate partition are inclined relative to the direction of alignment so that each of the jets at the outlet of the orifices is directed against a solid wall of the second uniformization chamber, such that the end wall.
- the sum of the surfaces of the first orifices represents a rate of opening of the intermediate wall between the intake chamber and the first pressure uniformization chamber, with a value of between 2% and 8%; the sum of the surfaces of the second orifices represents a rate of opening of the partition between the first pressure chamber and the second pressure chamber, with a value of between 9% and 15%;
- the side wall or walls of the frame have at least one lateral opening to said at least one pressure uniformization chamber, and at least one shutter removable from said lateral opening;
- each of the nozzles comprises a tubular body, having a cylindrical bearing end cooperating sealingly with a seat of a wall orifice, the other end having a machining defining the outlet of the nozzle, each of the nozzles being maintained by a nut, traversed by the nozzle, cooperating by screwing with a thread of the orifice to compress the bearing end on the seat;
- the ramp has a mechanical keying system between the bearing end of the nozzle body and the seat of the orifice, ensuring the correct angular positioning of the nozzle body on its axis.
- the invention also relates to a rolling mill comprising a roll stand, at least one pair of work rolls capable of defining the air gap of the strip to be rolled, and at least one spray bar of a lubricating fluid and or refrigerant, according to the invention suitable for projecting a curtain of fluid on the strip to be rolled and / or on the rolls of the rolling mill.
- the rolling mill comprises a feed system for said at least one ramp supplying said at least one ramp from one end of the tubular shaft, the other end of the tubular shaft being closed.
- said rolling mill comprises an operator-side access window from which the rolls of the rolling mill can be extracted, the feed system being located on the opposite side of the cage to the access window.
- the invention also relates to a cooling method implemented by a spray boom, or by a spray boom of a rolling mill according to the invention, in which a rolled strip and / or the rolls are cooled. 'a rolling mill, by creating a fluid curtain generated by the spray boom and wherein said cooling fluid is supplied with said ramp only from one of the two ends of the tubular shaft.
- FIG. 1 is a perspective view illustrating a pair of spray booms according to the state of the art, as well as its fluid supply system which simultaneously feeds the two ends of each of the two tubular shafts of said spray booms; ,
- FIG. 2 is a plan view of a ramp of FIG. 1, illustrating in transparency the individual ducts between the nozzles and the hollow of the shaft,
- FIG. 3 is a perspective view of a flow measurement device, suitable for knowing variations in the flow rates of the nozzles of a spray boom,
- FIG. 4 is a comparative graph of the distributions of the flow rates of the ramps along their length, with the flow information on the ordinate, and the position information on the width of the band on the abscissa, a first curve illustrating the distribution of a ramp according to the invention when fed from one side, a second curve illustrating the distribution of a ramp according to the state of the art when fed from both sides, and finally, a third curve illustrating the distribution of the ramp according to the state of the technique when fed from one side only.
- FIG. 5 is a sectional view of a ramp according to the invention according to an embodiment, according to a plane passing through the axis of the shaft, illustrating the pipe system internal to said frame and which has two chambers of standardization of pressure, arranged in series in the direction of flow of the fluid between the hollow of the shaft and said nozzles
- FIG. 6 is a sectional view of the ramp according to FIG. 5, in a plane perpendicular to the axis of the shaft
- FIG. 7 is a detailed view of FIG. 6, more particularly illustrating the way in which the internal orifices (first orifices and second orifices) can be cleaned by insertion of a rectilinear tool, as well as the specific inclinations of the jets at the outlet of the first and second orifices,
- FIG. 8 is a detail view of a nozzle, its tightening nut, more particularly illustrating a keying system which comprises ears of a bearing end of the nozzle body, and complementary cavities on the seat of the nozzle. chassis wall hole,
- FIG. 9 is a partial view of a High type rolling stand comprising two pairs of ramps, the two ramps of each pair being disposed respectively below and above the plane of the strip to be rolled, the two pairs ramps being disposed on either side of the rolling plane passing through the axes of the working rolls (not shown),
- FIG. 10 is a view of the rear frame, opposite to the access door of the rolling mill, more particularly illustrating the system for supplying the ramps with fluid, located at the rear frame, supplying said ramps, each, solely from from one end of the tubular shaft.
- FIG. 1 is a perspective view illustrating a pair of spray bars according to the state of the art, with an upper ramp 1 'and a lower ramp 1'.
- FIG. 2 is a view of such a ramp, illustrating in transparency the internal pipes.
- This ramp comprises a shaft 2 ', hollow tubular, and a frame in the form of a welded mechanic welded along the shaft 2'.
- a plurality of nozzles 4 ' are secured along the frame, these nozzles 4' typically screwed into bores 40 'regularly distributed over the length of the frame. This row of nozzles 4 'makes it possible to generate a curtain of fluid.
- a second row of nozzles 4 " is provided along the frame, in the immediate vicinity of the shaft, generating a second fluid curtain, distinct from the first, the nozzles 4 'of the first row are supplied with cooling fluid, from tubular shaft, each by means of an individual pipe, substantially radial to the hollow shaft For each individual pipe, one end of the pipe opens into the hollow of the shaft via a hole of wall, and the other end is connected to said nozzle.
- the nozzles 4 "of the second row are supplied with cooling fluid, from the hollow of the tubular shaft, each by means of a pipe individual.
- a measuring device allowed to characterize these flow rate variations.
- This apparatus comprises a plurality of juxtaposed compartments, and so that, during the test phases, the jets of the different nozzles respectively fill the different compartments of the measuring device.
- the ramp is fixed on a ram truck. This carriage positions the ramp to the right of the measuring device, only when the flow rate of the nozzles is stabilized, and so that the jets of the different nozzles respectively feed the separate compartments of the device.
- the timer is then started.
- the ramp is immediately translated out of the device and the stopwatch is stopped.
- the liquid height measurements of the different compartments, identical sections allow to find by calculation the flow of each nozzle of the ramp.
- Such a measuring device has made it possible to establish the second curve of the graph of FIG.
- a spray boom 1 for lubricating and / or cooling a rolled strip and / or pressure rolls of a rolling mill comprising:
- tubular shaft 2 whose hollow interior volume forms a fluid inlet chamber Ca, a frame 3 fixed rigidly to the outer wall of the shaft 2, extending along said tubular shaft,
- a plurality of nozzles 4 distributed along the length of the chassis 3 and carried by the chassis,
- a pipe system 5 internal to said chassis 3, supplying the nozzles 4 with through orifices 20 formed in the tubular wall of the hollow shaft 2, said pipe system 5 comprising two chambers of uniformity of pressure 50.51.
- the shaft 2 tubular, may be cylindrical, its ends being typically intended to be guided by bearings integral with the roll stand.
- the nozzles 4 are distributed along the length of the frame, preferably regularly, namely according to a constant nozzle gap which may be between 40 mm and 100 mm, preferably between 40 mm and 60 mm such as 50 mm. These nozzles are aligned preferably in a direction parallel to the axis of the shaft 2. The nozzles are arranged so that the jets form a curtain of fluid.
- Said pressure equalization chambers 50, 51 thus extend over the entire active length of the frame, namely at least over the length of the frame carrying all the nozzles 4.
- the function of these chambers is to smooth (homogenize) the pressure of the fluid along the length of the frame, and so as to standardize the flow rates of the different nozzles 4 along this length.
- the first orifices 20 along the hollow shaft 2 are distributed along the length of said two pressure equalization chambers. These orifices preferably have the same diameter, and are regularly spaced in the axial direction of the shaft.
- the frame 3 comprises a top wall 30, a bottom wall 31, two side walls 32, 33 sealingly integral with the outer wall of the shaft 2, as well as a wall of end 34 bearing bores 40 for the plurality of nozzles 4.
- Such an embodiment is illustrated in Figures 5 and 6.
- These walls 31, 32, 33, 34 of the frame 3 form with the outer wall of the tubular shaft 2. caisson.
- the top wall 30 and the bottom wall 31 preferably extend parallel to each other.
- a first longitudinal weld 37 provides the sealing connection between a longitudinal edge of the top wall 30 and a first generatrix of the cylindrical wall of the shaft 2, and a second longitudinal weld 38 provides the sealing connection between an edge.
- the side walls 32, 33 are preferably substantially parallel to each other and perpendicular to the axis of the shaft 2.
- a peripheral weld (not shown) extends in an arc and provides a tight connection between an arcuate edge of the side wall 32 (or 33) and the cylindrical wall of the cylinder.
- a single partition 35 divides the internal volume of the box into two pressure equalization chambers 50, 51 through which the entire fluid supplying said plurality of nozzles 4 passes successively, including: a first chamber; standardization 50 of pressure defined between said partition 35 and the outer wall of the shaft 2 carrying the orifices, said first orifices 20,
- the first pressure equalization chamber 50 thus extends:
- the second pressure equalization chamber 51 thus extends:
- the two pressure equalization chambers 50, 51 are juxtaposed and positioned in series in the direction of flow of the fluid (between the hollow shaft and said nozzles) in that the fluid flows through the rooms one after the other.
- the number of rooms can be two, three or more.
- the following description and the example illustrated give a ramp configuration for which the pressure equalization chambers, labeled 50 and 51, are two in number.
- a number of pressure equalization chambers equal to two represents a good compromise between the performance obtained in terms of homogenization of nozzle flow rates, the cost of manufacturing the ramp, and the overall pressure losses in the ramp.
- said (or each) partition 35 has orifices, said second orifices 36, distributed along the length of the partition 35.
- These second orifices are preferably of the same diameter, distributed in an axial direction of the shaft, preferably regularly.
- the number of nozzles of the plurality of nozzles being an integer N
- the number of first orifices and the number of the second orifices are each equal to N.
- Each orifice 40 of a nozzle 4 can thus be aligned with the one of the first orifices 20 and one of the second orifices 36, in an alignment direction substantially perpendicular to the axis of the shaft.
- Such an arrangement advantageously allows, after the disassembly of the nozzle 4, the cleaning of these three orifices 20, 36, 40 by the insertion of the same tool marked rectilinear gold traversing simultaneously these three openings in the direction of alignment.
- This tool Gold can be inserted successively through each of the orifices 40 to allow the cleaning of all the first orifices 20 and second orifices 36.
- the diameter of the second orifices 36 is preferably greater than the diameter of the first orifices 20.
- the machining of said first orifices 20 can be inclined with respect to the alignment direction so that each of the jets at the outlet of the orifices is directed against a solid wall of the first uniformization chamber 50 such that As shown in dotted line in FIG. 7, each machining of a first orifice 20 is inclined relative to the direction of alignment so that the jet at the outlet of this orifice 20 is directed against a solid wall.
- a solid wall such as the partition 35, and not in the axis of an orifice 36 of this partition.
- the machining of said second orifices 36 of the partition 35 are inclined relative to the alignment direction so that each of the jets at the outlet of the orifices is directed against a solid wall of the second uniformization chamber 51, such as the end wall 34.
- each machining of a second orifice 36 is inclined with respect to the alignment direction so that the outlet jet of this orifice 36 is directed against a solid wall such as the end wall 34, and not in the axis of an orifice 40 of the nozzle 4.
- the inclinations of the orifices 20 or 36 with respect to the alignment direction may be of the order of 20 °, for example between 15 ° and 25 °.
- the angles of inclination of the machining operations can be alternated along the length of the partition for the orifices 36 (or of the shaft for the orifices 20).
- the sum of the surfaces of the first orifices 20 represents an opening rate of the intermediate wall between the intake chamber Ca and the first pressure equalization chamber 50, with a value of between 2% and 8%, such as for example 5%
- the sum of the surfaces of the second orifices 40 represents a rate of opening of the partition 35 between the first pressure chamber 50 and the second pressure chamber 51, with a value of between 9% and 15%, such as for example 12% .
- the surface of the partition 35 is substantially identical.
- the opening rate of the intermediate wall is 5%, it means that the sum of the surfaces of the first orifices represents 5% of the Sint surface.
- the opening rate of the partition is 12%, it means that the sum of the surfaces of the first orifices represents 12% of the surface of this partition 35.
- the one or more side walls 32, 33 of the frame have at least one lateral opening 53, 54 to said at least one pressure equalization chamber 50, 51, and at least one removable shutter 55, 56 of said lateral opening.
- This lateral opening in said chamber facilitates cleaning, for example by inserting a jet of water.
- the two side walls at the ends of each pressure equalization chamber 50 51 have such openings.
- Two openings 53 and 54 of the side wall 32 respectively allowing access to the first pressure equalization chamber 50 and the second pressure equalization chamber 51.
- the other side wall 33 has two Other openings respectively allow access to the first pressure equalization chamber 50 and the second pressure equalization chamber 51 at the other end of the chambers.
- Each of the nozzles 4 may comprise a nozzle body 41, tubular, having a bearing end 46 sealingly cooperating with a seat 45 of an orifice 40 of the end wall 34.
- the other end of the body having a machining 47 defining the outlet of the nozzle 4, and thus the shape of the jet output.
- Each of the nozzles 4 can be held by a nut 42 traversed by the nozzle body, cooperating by screwing with a thread (a tapping) of the orifice 40 to compress the bearing end 46 on the seat 45 of the orifice 40.
- the bearing end 46 may be constituted by a cylindrical shoulder, of diameter greater than the outer diameter of the tubular body 41.
- the assembly may comprise a mechanical keying system 43,44 between the end of support 46 of the nozzle body and the seat 45 of the orifice, ensuring the correct angular positioning of the nozzle body about its axis.
- the bearing end 46 (including the shoulder) may thus comprise one or more lugs 43, radial (s) and the seat 45 one or more complementary cavities (s) 44 for the ears 43.
- the assembly of the nozzle body resting on the surface of the seat is possible only when the or each ear 43 enters the corresponding complementary cavity 44. These are nozzles that have no flow control system per se.
- the measuring apparatus illustrated in FIG. 3, made it possible to characterize the variations of flows of the ramp according to the invention illustrated in FIGS. 5 and 6 and for which the rate of wall opening is 5% for the wall. intermediate and 12% for partition 35.
- the ramp is fixed on a ram truck. This carriage positions the ramp to the right of the measuring device, only when the flow rate of the nozzles is stabilized, and so that the jets of the different nozzles respectively feed the separate compartments of the device.
- the timer is then started. As soon as one of the compartments of the measuring device reaches a limit fluid height, the ramp is immediately translated out of the device and the stopwatch is stopped.
- the liquid height measurements of the different compartments, identical sections allow to find by calculation the flow of each nozzle of the ramp.
- This test has been repeated several times.
- the standard deviation measuring the dispersion of the flow measurements along the length of the boom could be calculated for each test.
- the standard deviation of minimum distribution is 1.31%
- the standard deviation of maximum distribution is 2.96%.
- the average standard deviation of distribution is 2.17%.
- the first curve labeled "2.4%" of the comparative graph in Figure 4 illustrates such a test for which the standard deviation is 2.4%.
- a dashed curve superimposed is the average curve of this test. It is noted that the ramp according to the invention makes it possible to obtain better performances, even when fed from a single side, and by comparison with the ramp according to the state of the art fed from both sides of the shaft.
- the invention also relates to a mill 100 comprising a roll stand, at least one pair of working rolls capable of defining the gap of the strip to be rolled, and at least one spray boom of a lubricating fluid and and / or refrigerant, according to the invention suitable for projecting a curtain of fluid on the strip to be rolled and / or on the rolls of the rolling mill.
- the rolling mill may be a "20 High" rolling mill.
- the rolling mill may comprise two pairs of ramps 1, the two ramps of each pair being arranged respectively below and above the plane of the strip to be rolled.
- the two pairs of ramps are conventionally arranged on either side of the rolling plane passing through the axes of the working rolls (not shown).
- the shaft 2, tubular of each ramp is cylindrical, its ends being guided by bearings integral with the roll stand.
- a cylinder Vr including hydraulic, connects the frame and the shaft 3. This actuator rotates the ramp 1 about the axis of rotation of the shaft, and then firmly hold the ramp to the desired position.
- the rolling mill comprises a feed system 110 of said at least one ramp 1 feeding said at least one ramp from one end of the tubular shaft 2, the other end of the tubular shaft being closed.
- This supply system 110 is located on the opposite side of the cage to the access window from which the rolls of the mill can be extracted.
- the access window is devoid of a fluid supply system for the ramp or ramps.
- the invention also relates to a cooling method implemented by a spray boom according to the invention also by a spray boom of a rolling mill according to the invention, in which a rolled strip is cooled and / or the rolls a rolling mill, by the creation of a fluid curtain generated by the spray boom and in which said ramp is supplied with cooling fluid only from one of the two ends of the tubular shaft.
- Chassis walls respectively from above, from below, from the side (left in FIG. 5), from the side (right in FIG. 5), and from the end,
- Chassis wall holes (for nozzles),
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1659089A FR3056422B1 (en) | 2016-09-27 | 2016-09-27 | SPRAYING RAMP OF A LUBRICATING AND / OR REFRIGERATING FLUID |
PCT/FR2017/052576 WO2018060580A1 (en) | 2016-09-27 | 2017-09-26 | Ramp for spraying a lubricating and/or refrigerating fluid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3519116A1 true EP3519116A1 (en) | 2019-08-07 |
EP3519116B1 EP3519116B1 (en) | 2021-03-17 |
Family
ID=57796464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17780506.6A Active EP3519116B1 (en) | 2016-09-27 | 2017-09-26 | Ramp for spraying a lubricating and/or refrigerating fluid |
Country Status (6)
Country | Link |
---|---|
US (1) | US11338340B2 (en) |
EP (1) | EP3519116B1 (en) |
CN (1) | CN109789454B (en) |
ES (1) | ES2875780T3 (en) |
FR (1) | FR3056422B1 (en) |
WO (1) | WO2018060580A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3808466A1 (en) * | 2019-10-16 | 2021-04-21 | Primetals Technologies Germany GmbH | Cooling device with coolant jets with hollow cross-section |
IT201900019181A1 (en) * | 2019-10-17 | 2021-04-17 | Danieli Off Mecc | DISTRIBUTOR TUBE FOR COOLING METALLIC TAPES |
CN113042631A (en) * | 2019-12-26 | 2021-06-29 | 上海赛科利汽车模具技术应用有限公司 | Aluminothermic forming device and operation method thereof |
CN114308488B (en) * | 2021-12-15 | 2022-07-01 | 江苏荣生电子有限公司 | Balanced reciprocating spraying mechanism for spraying electrode foil |
FR3144765A1 (en) | 2023-01-10 | 2024-07-12 | Fives Dms | Rolling mill equipped with a device for adjusting the inclination of the spray ramp. |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL78648C (en) | 1948-06-10 | |||
US3212719A (en) * | 1963-11-20 | 1965-10-19 | Corpo Dino D Di | Water curtain protective spray nozzle adapter |
DE2248065C3 (en) * | 1972-09-30 | 1978-03-02 | Kupex Ag, Glarus (Schweiz) | Irrigation device and process for their manufacture |
US3854665A (en) * | 1974-02-07 | 1974-12-17 | J Rodgers | Oscillating sprinkler with snap-in nozzle strip |
US3998084A (en) | 1974-11-01 | 1976-12-21 | Marotta Scientific Controls, Inc. | Cooling spray system for rolling mill |
JPS623203U (en) * | 1985-06-18 | 1987-01-10 | ||
JPS623203A (en) | 1985-06-29 | 1987-01-09 | Toshiba Corp | Solid-state color image pickup device and its production |
JPH02155506A (en) * | 1988-12-07 | 1990-06-14 | Sumitomo Metal Ind Ltd | Method for controlling sheet thickness of hot rolled stock |
US5657928A (en) * | 1995-11-06 | 1997-08-19 | Jian; May-Be | Adjustment structure of a rotary sprinkler |
TWI273884B (en) * | 2006-03-24 | 2007-02-21 | Yuan Mei Corp | Improved structure of water-stopping and -discharging controller of sprinkler |
TWI273885B (en) * | 2006-03-24 | 2007-02-21 | Yuan Mei Corp | Improved structure of water-stopping and -discharging controller of sprinkler |
JP5581755B2 (en) * | 2010-03-18 | 2014-09-03 | Jfeスチール株式会社 | Steel cooling device and cooling method |
EP2676744A1 (en) * | 2012-06-22 | 2013-12-25 | Siemens VAI Metals Technologies GmbH | Device for sprinkling a rolling plant and method for extracting/inserting said system from/in said rolling cage |
CN102756000A (en) * | 2012-07-06 | 2012-10-31 | 上海交通大学 | Jet flow cooling method and device in narrow slit water jacket passage of steel plate |
JP5631942B2 (en) * | 2012-08-06 | 2014-11-26 | 新日鐵住金株式会社 | Cooling system |
FR3013242B1 (en) * | 2013-11-15 | 2016-05-06 | Fives Dms | MULTI-YELLOW ROLLER INCORPORATING A PORTILLON |
US9561393B2 (en) * | 2014-05-16 | 2017-02-07 | Stephen D. Shoap | Fluid hose apparatus with integrated nozzle and related systems and methods |
FR3023192B1 (en) * | 2014-07-01 | 2016-08-05 | Fives Dms | ROLLING MILL FOR EXAMPLE COLD ROLLING MILL |
CN107309280B (en) * | 2015-07-20 | 2019-01-25 | 东北大学 | The controllable spray thrower of Multicarity flow |
-
2016
- 2016-09-27 FR FR1659089A patent/FR3056422B1/en not_active Expired - Fee Related
-
2017
- 2017-09-26 WO PCT/FR2017/052576 patent/WO2018060580A1/en unknown
- 2017-09-26 CN CN201780058194.2A patent/CN109789454B/en active Active
- 2017-09-26 US US16/337,131 patent/US11338340B2/en active Active
- 2017-09-26 ES ES17780506T patent/ES2875780T3/en active Active
- 2017-09-26 EP EP17780506.6A patent/EP3519116B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR3056422B1 (en) | 2019-06-28 |
CN109789454B (en) | 2021-03-16 |
FR3056422A1 (en) | 2018-03-30 |
ES2875780T3 (en) | 2021-11-11 |
US20190224732A1 (en) | 2019-07-25 |
EP3519116B1 (en) | 2021-03-17 |
US11338340B2 (en) | 2022-05-24 |
WO2018060580A1 (en) | 2018-04-05 |
CN109789454A (en) | 2019-05-21 |
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