MXPA06000683A - Device for transporting metal strip coils on pallets - Google Patents

Abstract

A pallet (4) has a support saddle (13) formed by two longitudinally spaced U-shaped transverse blocks (14) connecting the longitudinal rails (11) to receive a coil of metal strip. The pallet has two radiant heat shield plates (26,27) fixed between the strips and rails, longitudinally flanking the supports.

Description

TRANSPORT DEVICE FOR A METAL BAND BEAM ON PLATFORMS FIELD OF THE INVENTION The invention relates to a device for transporting a bundle of very heavy metal bands produced by means of winding a metal strip produced in a rolling process, comprising platforms used in a circulating system, sets of rollers that they advance them, consisting of a platform of longitudinally spaced supports and of a seat carrying the beam that forms bridges between the longitudinal supports which has a support that includes a support angle. BACKGROUND OF THE INVENTION This type of platform circulation systems have been used for a long time in relation to bundles of cold rolled metal strips which are wound on reels in a rolling mill, for example in the aluminum industry. They are characterized by a high transport performance with beam weights of up to 45 tons and short sequences. In comparison with other transport systems, relatively small masses are moved, which leads to reduced wear and a good positioning capacity. Simultaneously, advantages are obtained in maintenance costs, availability, stock of spare parts, loading and unloading of bundles (coils), as well as increased transport performance simply by means of additional platforms. In addition, high flexibility and a decoupling of the loading and unloading power is obtained. A circulating system of this type with the use of platforms to transport heavy bundles or coils for example with a weight of 30 to 45 tons, and which are hot, that is with an outside temperature of. The rolled bundles of approximately 500 to 800 ° C, despite the great advantages has not been taken into account due to the high temperatures. And in addition to the high weights, high thermal loads occur which produce unavoidable structural deformations. These lead to displacements of platforms that can rise up to a few millimeters. The distribution of the temperature in the plate is therefore irregular and in the area of the seat support has a greater effect than in the shadow areas of the hot beam radiation and the areas perpendicular to the radiation surfaces. SUMMARY OF THE INVENTION The invention therefore proposes the task of presenting such a device which, despite the accumulated influences of charge and heat, allows a transport system with safe operation. This task is solved according to the invention because the platforms for transporting a hot beam are provided with contours in at least their longitudinal supports, which balance the previously calculated vertical and horizontal deformation produced by the load and the temperature. The invention is based on knowledge based on the calculation of finite elements, that the longitudinal supports of the platforms remain on the track given by the circular track left by the rollers during their movement and thus maintain their capacity to advance, if by at least the longitudinal supports according to the invention are pre-made on the basis of the deformations that will occur and adjust to the vertical and horizontal deformations. The formation of a vault in the advance surfaces and also lateral deformations outwards or of any other type do not have any disadvantageous effect on the platform's advancement capacity, in such a way that it is possible to use the platforms to transport the beams hot without problems. These contours can be narrows or notches in the area of the circular track, holes in other parts of the platform, levels or similar, this is measures that under mechanical and thermal loads, the longitudinal supports and with this the platform present an advance so less close to the ideal. It prevents a hot beam collapse that can be caused by variations in transport speed and shock, even when transported to the hot beam resting on its external surface. This means that it is not necessary to transport the hot beam on its upper surfaces (disc side). A preferred embodiment of the invention provides that the platform is formed with elements of a thermal protective material that prevents radiation and conduction of heat from the hot beam placed on the seat towards the longitudinal support. These thermal protective elements, according to one embodiment of the invention, advantageously are a thermal protective shield placed between the supports in the lower part of the beam seat above the longitudinal supports and extending the full width of the platform, as well as complementary or alternatively a thermal protective shield that extends equally across the entire width of the platform from the front side of the platform towards the supports of the beam-carrying seat, thus avoiding the radiant heat, which clearly reduces the influence deformant on the platform and its longitudinal supports. A special measure that gives shape consists in that the advance surfaces of the longitudinal supports according to the invention are formed in the form of skids and the front side relative to the roller transport line, present oblique surfaces that grow upwards with a angle. With this, although the longitudinal supports are subjected to an upward deflection caused by a horizontal component of the load of the hot beam placed on the support of the seat, it can be obtained that below the inclined surface there is a free space, which allows the advance and the smooth transport of the platforms on the rollers. In a preferred embodiment of the invention, two movable individual runners form a longitudinal support. The platform thus moves on four movable-supported individual skids, which can react independently of each other, but in addition to the thermal influences and large weights and with the contours just producing an ideal advancing surface. A preferred embodiment of the invention provides that between the inclined surfaces and a central planar section, which has at least one length corresponding to the distance between the spokes of the rollers forming the roller track, the longitudinal carrier has an inclined section forming a smaller angle with the transport line. By means of the unequal angles which are formed between the distance between the roller or the distance between the radii of the rollers of the roller track and the flat central section of the longitudinal support, the longitudinal support is achieved without joining the to advance the roller track, but the oblique sections rather form slightly concave arcs, decreasing each time the angle until reaching almost zero degrees. Together with the central section of the longitudinal support, an idealized advancing surface is formed flatter, in total longer optionally covered with several rollers. The angle of the inclined surfaces, on the other hand, remains almost unchanged and thus guarantees a vibration-free advancing capability. According to another embodiment of the invention, the longitudinal supports have, in an intermediate section between the supports of the carrier seat, a zone of compressed elastic deformation. A deformation of the contour that compensates the longitudinal carrier is here at the action site with the greatest effect of heat, that is under the beam above the sheet and the sheet cover of the plate between the supports. The advance sections of the longitudinal supports passing through several feed rollers which remain on both sides near the compressed part, which are flat to the inclined surfaces of the front side, are thus discharged from the radiated heat, which also contributes the thermal protector shield on the foot of the carrier seat. According to the invention, it is proposed that the longitudinal support be placed with a flexible support on carrier bolts projecting outwards from the platform frame that has the beam carrier seat. This mobile support, for example rubber, plastic or similar sleeves, allows a limited movement and with this the exit of the longitudinal support in the case of a lateral shrinkage or compression of the platform, caused by the influence of the temperature. As another solution for compensating the shrinking or lateral movement of the plate, the invention proposes that the longitudinal support on one side be placed on a support articulated on a carrier pin projecting outwards from a seat carrying the beam of the frame of the platform and on the other hand it is supported with a free movement on a spherical bearing of the frame of the platform. The articulated support, which by means of a spacer ring is separated from the longitudinal support which is spaced a distance from the frame of the platform, can for example be made in the form of a cardan joint which has articulated structures in a semi-spherical form that separate each. The mobile support previously placed on the other end of the platform allows a free adjustment. By means of insurance it is avoided that they leave their support seats. BRIEF DESCRIPTION OF THE FIGURES Other characteristics and particularities of the invention emerge from the claims and from the following description of the embodiments of the invention represented in the drawings. In which: Figure 1 shows a longitudinal view of the transport system of platforms to transport metal beams with roller tracks with planes with different heights; Figure 2 shows the particularity of the transport system according to Figure 1 in a perspective view in a lifting structure integrated in the advance sections; Figure 3 shows the particularity of the advance sections of the circulating system of platforms of a roller track section in a top perspective view; Figure 4 shows as a particular feature in a side view a platform, shown spaced apart from a roller track shown schematically and between them the deformations of the longitudinal carriers of the platforms are shown with thick lines; Figure 5 shows the platform according to Figure 4 in top view; Figure 6 shows a side view of the platform according to Figure 4; Figure 7 shows a side view of another embodiment of a platform; Figure 8 shows a side view of another embodiment of a platform; Figure 9 is a particularity of the platform according to Figure 8 in a section along the line IX-IX; Figure 10 is a side view of another variant of a platform; Figure 11 shows the platform of figure 10 in top view; Figure 12 is a particularity of the platform of Figure 10 in a section along the line XII-XII; Figure 13 is a particularity of the platform according to Figure 10 in a section along the line XIII-XIII; Figure 14 is a side view of an embodiment of a platform formed with movable individual blades; and Figure 15 shows the platform of Figure 14 in a front view in sectioned front view. DETAILED DESCRIPTION OF THE INVENTION A system of transportation by platforms 1 shown in figure 1, used in a rolling plant to produce metal bands, has here transport sections 2, which are placed in different flat heights in a base 3. In the transport sections 2, the hot beams 5 which, after rolling, were wound in the form of coils or bundles of metal strips, are transported and distributed by means of platforms 4 and, in particular, carried to subsequent post-processing stations. Several work stations have been represented to receive the hot bundles 5 that come from the platforms 4. A lifting structure 6 integrated in the transport section 2 helps in the distribution in planes of different heights. The lifting structure 6 is seen in Figure 2, according to which in the upper and lower sections of the roller track 7 there are provided several platforms, of which in the embodiment example one carries a hot beam 5. The sections of the roller track 7 have a large number of rollers 8, which are driven by a drive motor 9 and individual chains 10 coupled with a series connection (see figure 3).

As shown for example in figures 5 and 6, the platforms 4 consist of two longitudinal supports 11 extending parallel and separated from each other, with a joining sheet 12 and a carrier seat 13 placed between them, and on these platforms it is Place a hot beam (see figure 2). The carrier seat 12 is formed of structures 14 with a substantially U-shaped section which are separated from each other and which form a bridge between the longitudinal carriers 11, which at upper ends adjacent to the hot beam 5, is provided with supports 15 which they extend inclined.

The hot beam 5 is thus supported with four supports 15 (see figure 5). The front supports 15 form a support angle and, which is optimized depending on the diameters of the hot bundles that are placed and guarantee a distribution as even as possible of the horizontal and vertical components of the load. Under the load of the hot beam and especially due to the effects of the high temperatures of the hot beam 5 (by radiation and heat conduction), the platform is deformed; the distribution of the tension leads to displacements, whereby the longitudinal supports 11 flex and move towards the sides, this is clearly shown in figures 5 and 11 by means of the exaggerated strokes of the lateral curvature 16. To guarantee the advancement of the platform 4 on the rollers of the roller track 7 of the transport section 21, the longitudinal supports 11 are formed with advancement surfaces in the form of runners which compensate for these effects, which from the front side in relation to the line of conveyor 17 (see figure 4 below and figure 10), of the rollers of the roller track 7, have surfaces 18 inclined upwards with an angle a. In the platform 4 according to figures 4 to 6 between the inclined surfaces 18 and a flat central section 19 of the longitudinal support 11 are also provided with inclined sections 20 (line ß) forming an angle ß with the transport line 17 which is smaller than the angle a of the inclined surfaces 18 (line a). The length of the central planar section 19 of the longitudinal support 11 is greater than the distance or the distance between radii T of the rollers 8. Without such a conformation the longitudinal supports 11 would be deformed under the load and the influence of the heat in accordance with the curve 21 shown in figure 4 with exaggerated lines directly below the platform, this in relation to the zero line 38 represented with stitched lines of the transport line 17, and with this they would arch upward, thereby Front and rear ends of the advance surfaces of the longitudinal supports 11 would move below the zero line 38 or the transport line. On the contrary, it is shown here, again in exaggerated lines, the advance of curve 22, according to which the angle ß 20 is modified (see line ß) in relation to zero, with which in collaboration with the deformation of the flat central section 19, an advance surface is produced as flat as possible allowing an exact transport along its entire length, which in no chaos can deform below the transport line 17 or the zero line 38. The angle of the inclined surfaces 18 (see the line OÍ) remains almost unchanged. To compensate for the lateral curvature 16 the longitudinal supports 11 are provided with recesses 23 associated with the circular track of the rollers 8 (see Figure 6). In all the embodiments of the platform for the compensation, in addition to the structures 14 of the carrier seat 13, contours have been formed in the form of transverse and longitudinal perforations 24,25. To limit the effects of heat, heat shields 26 and 27 have also been provided, and this is on the one hand between the supports on the foot of the carrier seat 13 above the longitudinal carrier 11 and on the other hand those that extend from the front ends of the front platform to the supports 15 or to its structures 14 (shields against heat 27). In the platforms 104 shown in Figure 7 the longitudinal supports 11 in addition to the inclined surfaces 18 extending at an angle, in its middle region between the supports 15 and the structures, there is a zone of compressed elastic deformation 28. The advancement surfaces 29 that are on both sides between the inclined surfaces 18 and the zone of elastic deformation 28 present a considerably larger surface area. flat that corresponds to multiples of the distance between radii T of the rollers 8. In the chaos of the platforms 204 according to figure 8 and 9 or 304 according to figure 10 to 13 the longitudinal supports 211 or 311 formed with surfaces inclined 18 on the front side, are placed externally on the base frames 30 of the • (see figure 9 figures 11 to 13). To compensate the thermal and mechanical displacements, the longitudinal supports 211 are supported on carrier bolts projecting outwardly 31, an elastic support 32 being intermediate (see Figure 9). By means of a spacer ring 33, a safety distance is guaranteed in relation to the base frame 30. The platform 304 of FIGS. 2 to 13 at its end adjacent to the left side of the platform shown in FIGS. 10 and 11 is formed with fixed supports for the longitudinal supports 311. The longitudinal supports are placed thereon on carrier pins 31 through spherical articulated supports 34 separated from the frame of the platform 30 with a spacer ring 35. At its end adjacent to the right side of the platform On the contrary, a mobile support (see Figure 12) is placed, for which purpose it is formed with a seat-shaped end (see representation in section of the right half of the image of Figure 10) and rest on a console of the frame 37 through a roller or sphere 36.

In the platform shown in Figures 14 and 15 consist both longitudinal supports 411 have two individual runners 39a, 39b. Each individual shoe 39a, 39b is supported by the platform 404 through a bearing 40 (see Figure 15) and has both forward and backward inclined surfaces 18 provided with an angle x.

Claims (10)

NOVELTY OF THE INVENTION Having described the invention as above, property is claimed as contained in the following: CLAIMS

1. A device for transporting a bundle of very heavy metal bands produced by means of winding a metal strip produced in a process of laminated, which covers platforms used in a circulating system, sets of rollers that advance them, consisting of a platform of longitudinally spaced supports and of a beam carrier seat that forms bridges between the longitudinal supports which has a support that includes an angle of support, characterized in that the platforms for transporting a hot beam are provided with contours in at least their longitudinal supports, which balance the previously calculated vertical and horizontal deformation produced by the load and the temperature. The device according to claim 1, characterized in that the platform is provided with means of protection against heat which reduces the radiation and heat conduction by the hot beam placed in the carrier seat towards the longitudinal supports . The device according to claim 1, characterized in that the advancing surfaces of the longitudinal supports are formed in the form of skids and the front side in relation to the transport line of the roller track have surfaces inclined upwards with a Ex angle The device according to claim 3, characterized in that between the inclined surfaces and a central planar area, which has at least one length corresponding to at least the distance between the spokes of the rollers, the longitudinal support has an inclined section that the transport line forms a smaller angle (ß). The device according to one of claims 1 to 3, characterized in that two movable individual runners form a longitudinal support. The device according to one of claims 1 to 3, characterized in that the longitudinal supports have an area of compressed elastic deformation in a middle section between the supports and the carrier seat. The device according to one of claims 1 to 3, characterized in that the longitudinal supports are supported on carrier bolts projecting outwards, with an elastic support intermediate. The device according to one of claims 1 to 3, characterized in that the longitudinal supports are placed on one side on bolts projecting outwards from a platform frame that has a carrier seat with an articulated support and on the other hand They are supported on one side by a free movement on a spherical bearing of the frame of the platform. The device according to one of claims 2 to 8, characterized in that it has a thermal protection shield extending over the entire width of the platform between the supports on the foot of the carrier seat above the longitudinal supports. The device according to one of the claims characterized in that it has a thermal protective shield extending from the front end of the platform towards the support of the carrier seat and covering the entire width of the platform.