EP2864064B1 - Row of backing rollers comprising a device for sprinkling a rolling plant and method for extracting/inserting said system from/in said rolling cage - Google Patents

Description

The present invention relates to a row of support rollers comprising a watering device adapted to a scrolling metal strip rolling installation, as well as a method for extracting / introducing said irrigating and guiding device out of / in said rolling stand according to the preamble of claims 1 and 13.

In particular, the invention relates to the lubrication, as well as the cooling of the metal strip and elements related to the cold rolling of said strip in continuous or reversible running in at least one rolling stand or rolling mill of a rolling installation. In particular, said elements refer to a set of superimposed cylinders having parallel longitudinal axes and placed substantially in at least one plane perpendicular to the running direction of the strip. The longitudinal axis of one of said cylinders is defined as an instantaneous axis of rotation, parallel to a generatrix of the cylinder and passing through the center of mass of said cylinder. More particularly, the present invention relates to the rolling of certain metal alloys requiring the use of small diameter rolling rolls, such as stainless steels, silicon steels, or some non-ferrous alloys. These metal alloys are rolled in installations comprising at least one multi-roll rolling stand such as, for example, 12-High or 20-High type mills, that is to say equipped with 12 or 20 rolls, as described in particular in the patent US 6, 116, 073 .

In known manner, the rolls of small diameter rolling of a rolling stand do not have sufficient rigidity to withstand without bending the rolling forces. They are therefore supported in the roll stand by cylinders and support rollers or support. A typical example of a 20-High rolling mill is presented in Figure 1 . The latter consists of an upper assembly of ten rolling rolls and a lower assembly of ten rolling rolls, each of the assemblies comprising, in a pyramidal or cluster structure, a working roll 3, 3 'in contact with the strip 2 to be rolled and supported by two intermediate support rollers 4, 4 ', themselves supported by three intermediate support rollers 5, 5a, 5', 5'a, themselves supported by four rows of rollers d support 6, 6 ', each row of support rollers consisting of a plurality of support rollers and saddles alternately mounted on a single axis carrying rollers, each support roller being in particular bordered by two saddles . Each row of support rollers 6, 6 'is furthermore positioned and fixed to the frame 1 of the rolling stand by means of said saddles 7 which allow the forces resulting from rolling to be taken up by the working rolls 3, 3', and that positioning relative to said frame 1 of the roll stand rows of support rollers 6, 6 'they maintain.

In order to facilitate the scrolling and rolling of the strip 2 between the working rolls 3, 3 ', the air gap of the rolls of cold rolling mills is sprinkled and lubricated. For this purpose, a lubrication fluid is sprayed on the strip to be rolled and on the surface of the working rolls. In some cases, the watering fluid also plays an important role in the evacuation of the calories produced in the air gap of the cylinders by the reduction of the band and its plastic deformation. It is thus common practice, in cold rolling, to cool the work rolls by pressurized watering with coolant coolant and lubricant. Generally, systems comprising watering nozzles make it possible to water at least part of the strip or part of the rolls with said coolant and lubricant coolant fluid.

In the case of a typical duo, quarto or sexto rolling mill, the watering of the work rolls is easily achievable because the accessibility to the rolls and to the band is excellent. On the other hand, the very compact design of the multicylinder mills, particularly of the 12- or 20-high type, is such that the space available for a device for spraying the work rolls is very limited. Nevertheless, irrigation devices for watering the band and working rolls are known to those skilled in the art, such as for a 20-High mill. Indeed, with reference to the Figure 1 such a watering device comprises in particular watering tables 11, 11 ', 12, 12' comprising a fixed portion 11A, 11A ', 12A, 12A', said fixed table and mounted cantilevered, secured to the frame 1 of the rolling stand, and comprising watering nozzles intended to essentially water the strip 2, and an articulated portion 11B, 11B ', 12B, 12B', said hinged table, comprising spray nozzles intended essentially for the purpose of watering of the work rolls 3, 3 '. In total, four watering tables 11, 11 ', 12, 12' are disposed in the rolling stand, respectively a lower watering table 11 at the rolling mill inlet and a lower watering table 12 at the outlet of the rolling stand. rolling cage used to water the lower portion of the strip 2 and the lower working roll 3, and a top 11 'watering table at the inlet of the rolling stand and a top 12' watering table at the exit of the cage rolling to irrigate the upper portion of the strip 2 and the upper working roll 3 '. In addition to their watering function, watering devices have a guiding and protective function. Indeed, the fixed tables at the milling cage inlet make it possible to guide an upstream end of the strip to be rolled when the latter enters the rolling stand, while protecting the rolling mill rolls and the watering nozzles located at the inlet or outlet. output of the rolling mill from damage that can be caused, for example, by a sheet-stuffing or breaking tape.

In normal practice, it is necessary to carry out a cleaning / replacement or a periodic control of the watering nozzles of each watering table. Unfortunately, the watering devices known to those skilled in the art do not allow easy access to said spray nozzles and an easy maintenance inspection equipment. Indeed, even after disassembly of the cylinders of the rolling stand, the design of the watering table prevents easy access to the spray nozzles of said fixed part of the watering table. Thus the control or the cleaning / replacement of irrigation nozzles of watering systems known to those skilled in the art, and the maintenance in general of said watering systems, are complex maintenance operations, long to carry out, and therefore economically unfavorable. In addition, the watering tables known to those skilled in the art have another disadvantage that is low rigidity resulting from their mounting cantilever.

An object of the present invention is to provide a cooling device for a multicylinder cold rolling mill of a metal strip capable of solving the aforementioned drawbacks, while guaranteeing a guiding of the strip and a protection of the rolling mill rolls. and watering nozzles and a very significant improvement in the maintenance required for the productive operation of the rolling mill.

For this purpose, a row of support rollers comprises a watering device of a new kind and a method of extraction / introduction of said watering device out / in the rolling stand are proposed by the content of claims 1 and 13.

A set of subclaims also has advantages of the invention.

• une table fixe d'arrosage de forme allongée configurée pour être solidarisée à, et en particulier en appui sur, une pluralité de sellettes d'une rangée de galets d'appui de ladite cage de laminage;
• ladite table fixe d'arrosage comprenant un réseau de distribution de fluide destiné à un acheminement d'un fluide d'arrosage vers lesdites buses pour ladite lubrification et ledit refroidissement de la bande et/ou dudit entrefer, un connecteur pour la connexion dudit réseau de distribution à un réseau d'amenée dudit fluide, et des moyens de fixation, répartis en particulier selon sa largeur, pour sa solidarisation, notamment localement, auxdites sellettes, de préférence aux sellettes d'extrémité de ladite table fixe. Préférentiellement, ledit connecteur est monté côté moteur lorsque ladite table fixe est montée dans la cage de laminage, mais un tel connecteur peut également être monté à chaque extrémité de ladite table fixe. Il s'agit par exemple d'un connecteur rapide, par exemple du type canule télescopique. Par côté moteur, il est fait référence au côté de la cage de laminage en vis-à-vis duquel sont situés notamment les moteurs d'entraînement des cylindres de laminage, par opposition au côté opérateur où se trouve un opérateur.

The present invention relates to a row of support rollers comprising: a plurality of support rollers and saddles mounted on a single roller bearing axis, a watering device comprising a plurality of nozzles, for lubrication and cooling the air gap of a multi-cylinder rolling stand intended for rolling metal strips, characterized in that said watering device comprises

• an elongated fixed watering table configured to be secured to, and in particular supported on, a plurality of saddles of a row of support rollers of said rolling stand;
• said fixed watering table comprising a fluid distribution network intended to convey a cooling fluid to said nozzles for said lubrication and said cooling of the band and / or said air gap, a connector for the connection of said network of distribution to a delivery network of said fluid, and fixing means, distributed in particular along its width, for its attachment, especially locally, said harnesses, preferably end harnesses of said fixed table. Preferably, said connector is mounted on the motor side when said fixed table is mounted in the rolling stand, but such a connector can also be mounted at each end of said fixed table. This is for example a quick connector, for example of the telescopic cannula type. By engine side, reference is made to the side of the rolling stand opposite which are located in particular the drive motors of the rolling rolls, as opposed to the operator side where there is an operator.

Preferably, said sprinkler device according to the invention comprises a hinged table of elongated shape, nestable, in particular by sliding, in a groove, for example cylindrical, rectilinear, disposed on one side of said fixed table, on at least areas preferential throughout its length. In particular, said hinged table comprises nozzles intended for watering at least one working cylinder, and preferably also for watering the intermediate rolls and supports adjacent to the roll stand, a distribution network of said fluid. for routing said watering fluid to said nozzles of the hinged table for said lubrication and said cooling of said working roll and preferably also for watering the intermediate rolls and adjacent supports, and at least one connector for connecting its distribution network (112) to said fluid supply network. For this purpose, said hinged table, and therefore its nozzles, are in particular adjustable in position by a system for controlling the movement of said hinged table, so that it can be directed mainly towards said work roll, and preferably also in direction of said intermediate cylinders when said articulated table is mounted in said rolling stand. Preferably, the distribution network of said irrigation fluid of said fixed table is independent of the distribution network of said irrigation fluid of the articulated table. In addition, the connector of each distribution network of said coolant fluid is in particular adapted to be automatically coupled to said supply network of said coolant during introduction of said row of support rollers and / or the articulated table in said rolling stand and / or a closing of a door operator side the chassis of the rolling stand, and conversely, to be automatically decoupled from the supply network during disassembly of said row of support rollers or said articulated table and / or an opening of said door chassis of the rolling stand.

In particular, said articulated table comprises at least at one of its ends, in particular positioned on the motor side when it is mounted in said rolling stand, means for coupling to a system, for example a mechanical system, for transmitting a motion control. , for example motorized, said articulated table, said motion control emanating from said motion control system, preferably positioned outside the rolling shaft on the motor side. Preferably, said coupling means to said transmission system is adapted to automatically couple said supply network to said irrigation fluid distribution network of said articulated table.

In addition, said coupling means of the articulated table and its interlocking with said fixed table advantageously allow extraction of the fixed table, particularly in the upper position, out of the rolling stand, and respectively its introduction into the rolling stand, independent of an extraction, respectively independent of an introduction, of said articulated table out respectively in said rolling stand, and vice versa. Thus, the disassembly or assembly of the fixed table and the hinged table are preferably independent of one another and can be easily made. In particular, after coupling of an extraction device of a row of support rollers to a coupling device of said fixed table of said sprinkler device or to a coupling device of said carrier shaft, said fixed table can be extracted or mounted simultaneously with said row of support rollers to which it is fixed by longitudinal sliding of said row of support rollers out of the roll cage or longitudinal sliding in the rolling stand in the case of introduction. In particular, said fixed table may comprise, at one of its ends, in particular the operator side when said sprinkler device is mounted in the rolling stand, said coupling device adapted for coupling the fixed table of the watering device to the extraction device of said row of support rollers. Thus, the extraction / introduction of a row of support rollers according to the invention makes it possible to simultaneously extract said fixed table, in particular in higher positions, from the watering device according to the invention.

The fixed table is preferably intended for watering the strip at the inlet or outlet of the rolling stand, and in particular has a geometry adapted to its attachment to said saddles, but also, preferably, said geometry is adapted to its implementation. in support with said saddles. Preferably, said fixing means are distributed, for example uniformly, according to the width of said fixed table, or preferably only on the end saddles of the row of support rollers. According to a preferred embodiment, only the end saddles of the row of support rollers are secured to said fixed table, while each of the other saddles of said row of support rollers is simply in contact or support with said fixed table, so as to reinforce its rigidity. Advantageously, the fastening of the fixed table of the watering device to the saddles allows said simultaneous extraction of the assembly formed of the row of support rollers and said fixed table. In addition, said joining of said fixed table to said saddles by said fixing means makes it possible to stiffen said fixed table, since the latter comprises several points. support and fixation not only over its length, but also over its entire width.

The present invention also relates to a row of support rollers comprising a plurality of support rollers and saddles mounted, for example alternately, on a single roller bearing axis, each support roller being in particular bordered by two saddles, said row of support rollers being intended to take up the rolling forces resulting from a multi-cylinder rolling stand, for example of 12- or 20-High type, characterized in that it comprises said watering device according to the invention for lubricating and cooling the band and / or the air gap of said rolling stand and as previously described. Advantageously, said saddles can thus serve not only as a support for said bearing axis of the support rollers, but also for the watering device according to the invention, in particular at said fixed table and / or at said articulated table of said watering device. In particular, each row of support rollers of the rolling stand whose one side is directly opposite the band can be equipped with said fixed table. The latter is particularly adapted to be secured to said side directly vis-à-vis the band so as to be closer to the latter. For example, in the case of a 20-High rolling stand, the seats of the rows of support rollers furthest upstream and further downstream of the rolling stand are equipped with the watering device according to the invention. .

Preferably, the saddles of said row of support rollers are configured to be connected by two adjacent surface plates intended to rest on the chassis of the rolling stand, said adjacent surface plates forming in particular an angle close to 90 ° C. with each other, and allowing, on the one hand, an increase overall of the rigidity of said row of support rollers, and secondly the extraction or introduction of said row of support rollers and the sprinkler device by longitudinal displacement, in particular by sliding, out or sliding in the rolling stand by means of an extraction device that can be coupled to the coupling device of said fixed table. Also, the integration of a fixed table to said row of support rollers facilitates the assembly / disassembly of the rows of upper support rollers, since said fixed table especially for the higher positions can in particular comprise a zone of support in the lower part, ie the part close to the band when said fixed table is fixed to said saddles in the rolling stand, said bearing area comprising in particular at least one longitudinal guide in the form of a groove for lateral guidance of said row of rollers equipped with the watering device, said groove 111 being able for example to act as said guide, and a flat bearing surface for supporting said row of support rollers during its extraction or introduction by means of a device extraction of row of support rollers, said guide being adapted to cooperate with a portion of said extraction device being equipped with a shape complementary to said guide.

The present invention also claims a multi-roll rolling stand, for example of the 12- or 20-High type, comprising at least one row of support rollers as previously described. Preferably, such a rolling stand further comprises said control system of said movement of said hinged table, said control system being in particular arranged on the motor side, outside said rolling stand and fixed to the engine side door of the frame of the rolling stand. The positioning on the motor side of the control system advantageously makes it possible to avoid, with respect to the prior art, a dismantling / mounting step of cylinders of said control system located preferentially operator side and intended to control the movement of the hinged table and hoses for supplying the distribution network (112) of said hinged table during disassembly / assembly of the watering device or rows of support rollers. In addition, said positioning also frees up the operator's side and increases the visibility of the open cage band.

• un couplage d'un dispositif d'extraction d'une rangée de galets d'appui à un dispositif de couplage de ladite table fixe dudit dispositif d'arrosage, ou à un dispositif de couplage d'un axe porteur de ladite rangée de galets d'appui, ledit dispositif de couplage de ladite table fixe ou dudit axe porteur étant adapté pour permettre une extraction de ladite rangée de galets d'appui par déplacement longitudinal, i.e. parallèlement audit axe porteur;
• une extraction, respectivement introduction, de ladite table fixe, par extraction, respectivement introduction, de ladite rangée de galets d'appui selon l'invention au moyen dudit dispositif d'extraction, par déplacement longitudinal hors de la cage de laminage, respectivement par déplacement longitudinal dans la cage de laminage, de ladite rangée de galets d'appui selon l'invention, ledit déplacement pouvant par exemple être un coulissement hors de ou dans ladite cage de ladite rangée de galets d'appui réalisé par ledit dispositif d'extraction installé par exemple à l'extérieur de la cage. En particulier, ladite méthode d'extraction, respectivement d'introduction, dudit dispositif d'arrosage est de plus caractérisée en ce qu'elle comprend une déconnexion, respectivement une connexion, automatique d'un réseau de distribution de fluide d'arrosage dudit dispositif d'arrosage à un réseau d'amenée dudit fluide d'arrosage;
• optionnellement, une extraction de ladite table articulée, ainsi que son introduction, par déplacement le long de son axe longitudinal, par exemple par coulissement, dans ladite rainure de ladite table fixe, notamment par ledit dispositif d'extraction, et par exemple simultanément à l'extraction/introduction en cage de ladite rangée de galets d'appui.

Finally, the present invention also relates to a method of extraction, respectively introduction, of a watering device of a row of rollers as described above,
characterized in that it comprises:

• a coupling of an extraction device of a row of support rollers to a coupling device of said fixed table of said watering device, or to a coupling device of an axis carrying said row of rollers; support, said coupling device of said fixed table or said carrier shaft being adapted to allow extraction of said row of support rollers by longitudinal displacement, ie parallel to said bearing axis;
• extraction, respectively introduction, of said fixed table, by extraction, respectively introduction, of said row of support rollers according to the invention by means of said extraction device, by longitudinal displacement out of the rolling stand, respectively by displacement longitudinal in the rolling stand, said row of support rollers according to the invention, said displacement being for example a sliding out of or in said cage of said row of support rollers made by said extraction device installed for example outside the cage. In particular, said method of extraction, respectively of introduction, of said watering device is further characterized in that it comprises a disconnection, respectively an automatic connection of a watering fluid distribution network of said watering device to a supply network of said irrigation fluid;
• optionally, an extraction of said articulated table, as well as its introduction, by displacement along its longitudinal axis, for example by sliding, in said groove of said fixed table, in particular by said extraction device, and for example simultaneously with the extraction / caged introduction of said row of support rollers.

Figure 1

exemple de dispositif d'arrosage d'un laminoir de type 20-High selon l'art antérieur.

Figure 2

exemple de réalisation d'un laminoir de type 20-High selon l'invention.

Figure 3

exemple de réalisation d'une table articulée d'un dispositif d'arrosage selon l'invention.

Figure 4

exemple de réalisation d'une rangée de galets d'appui supérieur intégrant un dispositif d'arrosage selon l'invention (vue de dessous).

Figure 5

exemple de réalisation d'une rangée de galets d'appui supérieur intégrant un dispositif d'arrosage selon l'invention (vue de dessus).

Figure 6

vue d'une partie de la face externe d'une cage de laminage côté moteur selon l'invention comprenant un exemple de réalisation d'un système de commande et de transmission d'un mouvement d'une table articulée.

Figure 7

vue d'une partie de la face interne d'une cage de laminage côté moteur selon l'invention comprenant un exemple de réalisation d'un système de commande et de transmission d'un mouvement d'une table articulée.

Exemplary embodiments and applications provided with the aid of the following figures will help to better understand the present invention.

Figure 1

example of a watering device of a type 20-High rolling mill according to the prior art.

Figure 2

exemplary embodiment of a type 20-High rolling mill according to the invention.

Figure 3

embodiment of an articulated table of a watering device according to the invention.

Figure 4

embodiment of a row of upper support rollers incorporating a watering device according to the invention (view from below).

Figure 5

embodiment of a row of upper support rollers incorporating a watering device according to the invention (top view).

Figure 6

view of a portion of the outer face of an engine-side rolling stand according to the invention comprising an exemplary embodiment of a control system and transmission of a movement of an articulated table.

Figure 7

view of a portion of the internal face of a motor-side rolling stand according to the invention comprising an exemplary embodiment of a control system and transmission of a movement of an articulated table.

For example, the figure 1 shows a sectional view of a type 20-High rolling mill comprising a watering device 11, 11 ', 12, 12' according to the prior art. A working roll 3, 3 'in contact with a strip 2 to be rolled is supported by two intermediate support rollers 4, 4' themselves supported by three intermediate support rollers 5, 5a, 5 ', 5'a, themselves supported by four rows of rollers 6, 6 'of support, each row of support rollers consisting of a plurality of support rollers and saddles 7 mounted alternately on a single carrier axis supported by said saddles 7.

The figure 2 shows a sectional view of an exemplary embodiment of a type 20-High rolling mill comprising a watering device according to the invention, with the same references as those used for the figure 1 . Unlike the figure 1 , the upper watering device 11 'and the lower watering device 11 arranged at the inlet of the rolling stand are respectively fixed to the saddles 7 of the row of upper support rollers and the saddles 7 of the row of rollers d lower support located furthest upstream with respect to the running direction D of the band. Similarly, the upper watering device 12 'and the lower watering device 12 disposed at the outlet of the rolling stand are respectively attached to the saddles 7 of the row of upper support rollers and the saddles 7 of the row of lower support rollers located furthest downstream with respect to the running direction D of the band.

The figure 3 shows an exemplary embodiment of an articulated table 11'B of a watering device according to the invention, comprising a distribution network 121 of watering fluid comprising in particular at least one part adapted to be engaged in said groove 111 (for example, for example Fig. 4 ) of said fixed table 11'A. Said articulated table 11'B further comprises a plurality of nozzles 122 distributed over the entire length of the hinged table, ie over the width of the rolling stand, and intended for the watering of at least one working roll 3, 3 'and intermediate cylinders and adjacent supports 4, 4', 5, 5 ', 5a, 5'a, 6, 6'. Preferably, said articulated table 11'B also comprises at each of its ends, a bracket 117 for supporting an upper working cylinder 3 ', said forks 117 of the articulated table being able to serve as a support for the upper work roll 3 ', especially during assembly or disassembly of rolls of the rolling mill, or other operations requiring the individual lifting of the upper working roll 3'.

The figures 4 and 5 show examples of embodiment of a row of rollers 6 'of support on the cage entry side with respect to the rolling direction "D" integrating a watering device according to the invention, seen from below ( Fig. 4 ) and top view ( Fig. 5 ). Said row of rollers 6 'of support comprises a plurality of rollers 61 bearing and saddles 7 alternately mounted on a single bearing axis 62 of rollers, each support roller being in particular bordered by two saddles. Each row of support rollers 6, 6 'is furthermore positioned and fixed to the frame 1 of the rolling stand at means of said plates 114 and said fifth wheels mounted alternately on a bearing axis 62 and which allow recovery of the forces resulting from rolling by the working rolls. Said saddles is fixed a fixed table 11'A of a watering device according to the invention. This fixed table 11'A comprises a distribution network 112 of irrigation fluid for supplying irrigation fluid nozzles 113 distributed vis-à-vis the band when said row of rollers 6 support is mounted in the rolling stand. Said row of support rollers 6 comprises in particular two plates 114 linking said saddles together and intended to each bear on the frame of the rolling stand. Each fixed table 11'A comprises in particular at one of its ends a coupling device 115 adapted for coupling the fixed table of the sprinkler device to an extraction device of said row of support rollers. Preferably, said coupling device 115 comprises a support hook element 1151 comprising a support zone for the operator-side chocks of the upper motorized intermediate 5 'cylinders illustrated in FIG. Fig. 1 and 2 . Advantageously, before the extraction operation of an intermediate cylinder 5 ', said cylinder 5' remains suspended by the operator side chock which can rest on said support hook member 1151 while being maintained, on the motor side, by a sleeve extension device for transmitting the engine torque. Said coupling device 115 also comprises in particular a latch 116 for axially holding the hinged table, in particular for preventing axial displacement of said hinged table when opening a door of the rolling shaft on the operator side.

The figures 6 and 7 are respectively a view of a portion of the outer face, respectively internal, motor side, of a preferred embodiment of a rolling stand according to the invention. An exemplary embodiment of a control system 41 is in particular fixed to the outside of the rolling stand, on an external face of the wall of the rolling stand or the door of the roll stand, on the motor side, and is coupled to a transmission system 42 of a movement of the articulated table. The control system 41 comprises in particular a jack whose rod is coupled to an axis 421 of said transmission system 42, said axis 421 passing right through the wall of the rolling stand so as to transmit towards the inside of the rolling cage a movement of said rod of said cylinder translating a control movement of the table hinged by the control system 41. Said axis 421 being particularly hollow to allow a routing of said watering fluid to the distribution network of the articulated table, in particular by allowing the connection of said articulated table distribution network to said routing network of said irrigation fluid. Said transmission system 42 is preferably automatically coupled to a coupling means of said articulated table to transmit said movement of the cylinder rod.

Claims (14)

1. Row of bearing rolls (6, 6') comprising:

   - a plurality of bearing rolls (61) and mounting plates (7) mounted on a single roll-bearing shaft (62),

   - a spray device (11, 11', 12, 12') comprising a plurality of nozzles (113, 122) for lubricating and cooling a strip (2) and/or the air gap of a roll stand with multiple rolls for rolling a metal strip (2), characterised in that the spray device comprises:

   - a fixed spray table (11A, 11'A, 12A, 12'A) of elongated shape configured to be rigidly connected to the plurality of mounting plates (7) in the row of bearing rolls (6, 6') of said roll stand;

   - said fixed spray table (11A, 11'A, 12A, 12'A) comprising a fluid-dispensing network (112) for routing a spray fluid towards said nozzles (113) for said lubricating and said cooling of the strip (2) and/or of said air gap, a connector for connecting said fluid-dispensing network (112) to a network for supplying said fluid, and an attachment means for rigidly connecting the table to said mounting plates (7).
2. Row of rolls (6, 6') according to claim 1, characterised in that the spray device comprises an articulated table (11B, 11'B, 12B, 12'B) of elongated shape, which can be fitted into a rectilinear groove (111) arranged on one side of said fixed table (11A, 11'A, 12A, 12'A).
3. Row of rolls (6, 6') according to claim 2, characterised in that said articulated table (11B, 11'B, 12B, 12'B) comprises a dispensing network (121) for said fluid, at least one connector for connecting its dispensing network (121) to said network for supplying fluid, and nozzles (122) for spraying at least one working roll (3, 3') of the roll stand.
4. Row of rolls (6, 6') according to one of claims 1 to 3, the spray device being characterised by a distribution of said attachment means across the width of said fixed table (11A, 11'A, 12A, 12'A) so as to increase the rigidity of the fixed table (11A, 11'A, 12A, 12'A).
5. Row of rolls (6, 6') according to one of claims 2 to 4, characterised in that said articulated table (11B, 11'B, 12B, 12'B) comprises, at least at one of its ends, means for coupling to a system (42) for transmitting a command for the movement of said articulated table (11B, 11'B, 12B, 12'B).
6. Row of rolls (6, 6') according to one of claims 1 to 5, characterised in that said fixed table (11A, 11'A, 12A, 12'A) comprises, at one of its ends, a coupling device suitable for coupling the fixed table (11A, 11'A, 12A, 12'A) of the spray device to a device for removing said row of bearing rolls (6, 6').
7. Row of rolls (6, 6') according to one of claims 5 or 6, characterised in that said means for coupling to said transmission system (42) is capable of automatically coupling said network for supplying said fluid to said fluid dispensing network (121) of said articulated table (11B, 11'B, 12B, 12'B).
8. Row of rolls (6, 6') according to claims 2 to 7, characterised in that the dispensing network (112) for said spray fluid of said fixed table (11A, 11'A, 12A, 12'A) is independent of the dispensing network (121) for said spray fluid of the articulated table (11B, 11'B, 12B, 12'B).
9. Row of rolls (6, 6') according to one of claims 1 to 8, characterised in that said connector of each dispensing network (112, 121) for said spray fluid is capable of being automatically coupled to said network for supplying said spray fluid when said row of bearing rolls (6, 6') or the articulated table (11B, 11'B, 12B, 12'B) is inserted into said roll stand.
10. Row of bearing rolls (6, 6') according to one of claims 1 to 9, characterised in that said mounting plates (7) are configured to act as a support to two plates (114) with adjacent surfaces intended to rest on the frame (1) of the roll stand, said plates (114) having adjacent surfaces forming in particular an angle preferentially close to 90° with one another.
11. Multi-roll roll stand comprising said row of bearing rolls (6, 6') according to one of claims 9 or 10.
12. Roll stand according to claim 11, characterised in that it comprises a control system (41) for said movement of said articulated table (11B, 11'B, 12B, 12'B), said control system (41) being positioned on the motor side, outside said roll stand and fixed to the frame (2) of the latter.
13. Method for removing, respectively inserting, a spray device (11, 11', 12, 12') from a row of rolls (6, 6') according to one of claims 1 to 12, characterised in that it comprises:

    - coupling of a device for removing a row of bearing rolls (6, 6') to a coupling device of said fixed table (11A, 11'A, 12A, 12'A) of said spray device or to a coupling device of a bearing shaft (62) of said row of bearing rolls (6, 6'), said coupling device of said fixed table or of said bearing shaft being suitable for providing for the removal of said row of bearing rolls by longitudinal movement parallel to said bearing shaft;

    - removal, respectively insertion of said fixed table (11A, 11'A, 12A, 12'A), simultaneously with removal, respectively insertion of said row of bearing rolls (6, 6') according to one of claims 1 to 12 by longitudinal movement out of the roll stand, respectively by longitudinal movement into the roll stand, of said row of bearing rolls (6, 6').
14. Method for removing, respectively inserting, a spray device (11, 11', 12, 12') according to claim 13, characterised in that it comprises automatic disconnection, respectively connection, of a dispensing network (112, 121) for spray fluid of said spray device to a network for supplying said spray fluid.

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