ES2228855T3 - PROCEDURE AND DEVICE FOR SEMIAUTOMATIC REALIZATION IN SITU, METAL DEPOSITS. - Google Patents

Abstract

The invention concerns a method whereby a steel strip (41) derived from a roll is gradually straightened out, cambered and engaged on rollers (13) supported on cylinders (12), until, after the corresponding perimeter is obtained, the ends are separated and welded together, then in lifting with the actuators (12) said first hoop to a height sufficient for production, then gradually assembling by welding a second hoop by the above process. All those operations are managed by a programmable automaton.

Description

Procedure and device of semi-automatic realization in situ , of metallic deposits.

The present invention relates to a method and to a semi-automatic embodiment device, in situ , of large capacity cylindrical metal tanks.

Problems of economic order arise for the realization of large diameter steel tanks, because it is excluded, for reasons of volume, to carry them out in places other than in situ , builders are obliged to open a specific workshop in them places of the implantation, displacing a sometimes important team of specialized workers (industrial boilers, welders, etc.) that only have, to carry out their task, a base material, which facilitates the forming, oxycutting and welding of sheet metal plates whose dimensions must be limited to facilitate maintenance and assembly. This results in a waste of time that results in high cost prices and problems, in terms of respecting the deadline imposed by the client, with respect to the planning previously established with the representatives of other labor bodies.

A procedure and a device are already known of realization of cylindrical tanks and ferrules from sheet metal, such as those described in European Patent No. 0136581 with which the ferrules are obtained by applying bands of sheet against the flange of a turntable, diameter appropriate, on which said bands are introduced progressively as the development of the coil and sheet metal straightening.

This procedure and this device can only nevertheless be used to make ferrules of small thickness, taking into account the flexibility of the sheet required by this mode of forming.

A procedure and a method are also known. semi-automatic storage device and ferrules corresponding to the preamble of claim 1 (Patent European No. 0727264). The procedure consists in carrying out, in this order, the following operations:

to)

Making a first ferrule

b)

Placement and solidarity of a roof on the first ferrule.

C)

Elevation of the set made in the previous operation at a height corresponding to the width of the sheet metal band

d)

Making a second low ferrule the first.

and)

Progressive Solidarization of the Ferrule performed in the operation (a) with the one performed in the operation previous (d).

F)

Repeat operations (c) (d) and (e) as many times as necessary to obtain the height of Cuba desired.

g)

Set placement, performed according to the previous operations, on a bottom of diameter corresponding and solidarity of this one with the last ferrule

The ferrules are made by bending, folding, to as the dragging and development of the coil takes place of sheet metal. When the realization of a ferrule takes place, directly below the previous one, the sheet metal band is progressively sympathetic to the previous ferrule, which drags in rotation, this solidarity being preceded by support as well progressive of this previous ferrule on the singing of the band of said wall in the process of passing until complete completion of this next ferrule. The control of the bending of the sheet metal band, according to the required radius is permanently insured, as dragging and passing of it takes place.

The device for applying the procedure previously mentioned, it is mainly characterized by the use of dragging and bending means of a band of sheet metal that comes from a roll and rollers associated with some cats lifting regularly distributed on a circumference to constitute a winch, with a diameter corresponding to that of the ferrules to be made, intended to temporarily hold the sheet after bending, the sheet being dragged by a tractor motorized rollers

While the procedure and the device such like those just described, it allows undeniably the realization of the ferrules directly from rolls of sheet, sufficiently respecting the required radius and the concordance of ferrules in order to obtain a tightness rigorous at each level, however, they do not allow themselves, reduce the cash of the team of skilled workers or have a determining influence on the duration of the realization.

The present invention aims to avoid these inconveniences. This invention as characterized in The claims solve the problem of defining a procedure and in creating a device that allows the semi-automatic realization in a very short time, for cash of highly reduced skilled workers, from large sheet metal warehouses capacity, from rolls of sheet metal of the trade.

The process of realization in situ of cylindrical metal tanks of great capacity, from sheet metal coils that uses a means of dragging, bending and passing of the sheet metal band as well as means of cross-cutting, approach and welding length of the sheet metal bands, which consists of making the ferrules by bending, progressive folding depending on the diameter sought, as the dragging and development of the sheet metal band takes place and in successively performing the top-down ferrules performing each one of them directly under the previous one, dragging it in rotation by progressive solidarity of the sheet metal band in the process of forming, this solidarity being preceded by also a progressive support of the preceding ferrule on the edge of the sheet metal band in the course from the passage to the complete realization of a following ferrule, the roof being fixed on the upper edge of the first ferrule after completion of this or the first two ferrules; the wall being in solidarity at the bottom as soon as it has reached the desired height, it is characterized, according to the invention, mainly:

1st)

because the realization of the ferrules It is preceded by the following operations:

to)

Realization of a fund by oxicorte circular of an assembly of sheet metal strips previously solidarity laterally with reference to a point C, determined arbitrarily on the surface of this assembly of plates.

b)

Materialization of the axis of symmetry of welding ferrules of a shaft reference device vertical Y that exactly matches the point C defined above the bottom surface in the previous stage.

C)

Precise positioning, with respect to Y axis, of the reference device, of all the means that concur in the drag, in the passage, in the guided, in the approach and welding of the sheet metal bands and to the elevation of the assembly as the realization.

2nd)

Because the vertical position of the step rollers of the lifting means is controlled to distance very precisely, individually and collectively, depending on the progression of assembly operations and the sequences imposed by them.

3rd)

Because the respective position of the Internal and external welding devices are indicated permanent very precisely in the course of its use, with immediate indication of the displacements that may appear between the two devices, so that this displacement can be immediately canceled in order to keep permanent a perfect match of welding points internal and external when the progression of this cord takes place Welding on ledge.

4th)

Because welding solidarity of the roof over the corresponding edge of the upper ferrule is accompanied by the rotation of the whole in 360º at a speed controlled compatible with the ideal progression of the cord welding.

5th)

Because the welding of the set over the fund is preceded by the support on some mobile blocks of the free edge of the lower ferrule, of the disassembly of the rollers passing, of the coordinated downward movement of said studs mobile until the support of said free edge of the lower ferrule, on the bottom contour, after evacuation by the man hole of unusable equipment for this operation final.

The device, according to the invention, which allows The application of the procedure described above is mainly characterized because all the means used to development, straightening, shaping, dragging, cutting, welding and lifting are governed by an automaton programmable, remotely controllable by a control box without threads, respecting predetermined data.

The position of the electrodes of the devices welding is controlled by detectors connected to a monitor that measures and represents, in real time, any position differences in view of immediate cancellation.

The advantages obtained, thanks to this invention, essentially consist of all the forming parameters, cutting, assembly and welding are determined previously very precisely and introduced in the programmable automaton before the opening of the workshop, leaving at the same time Operators control the entire process development to through non-remote remote control means, which allows therefore move to the place only a very limited number of people, reduced very often to three, decreasing to it time of completion, given the prior elimination of previous dead times that result from the preparation of adjustments, maintenance and testing.

Other features and advantages will appear in the following description of a procedure and a device of realization of tanks for the chemical industry, given to non-limiting example title with respect to the attached plans, in which:

- Figures 1 to 6 schematically illustrate the Main stages of the procedure.

- Figure 7 represents an elevation view schematic of a Cuba in progress.

- Figure 8 represents a view above schematically partial of a ferrule in progress.

- Figure 9 represents a view above the development system, curvature, cutting, approach and welding.

The device for making vats, according to the invention, mainly comprises a winch 10 constituted by a bottom 11 on which cats 12 associated with rollers 13, as well as a developer 20 consisting of a chassis 21, with a leveling jack that supports the bobbin holder, as well as the machine developed and curved 30 consisting essentially of three rollers 31, 32, 33 of the which one is fixed and motorized 31, one mobile and motorized 32, or conversely, that ensure, the clamping of the sheet 41 against the fixed and motorized roller 31 under the action of a jack 34, and one non-motorized mobile 33 which ensures the bending of the sheet 41, with control of the radius of curvature and of the passage of the sheet 41 by means, on the one hand, as regards the radio control of curvature, of a proximity detector 50, arranged in the part superior and in alignment with the bisector of the obtuse angle, formed by two arms in solidarity with each other and presenting, at its free end, a calibrated roller, said rollers being calibrated permanently attracted against the outer face of the sheet by a compass taken to the opening position by a cat of gas, and on the other hand, as regards the control of the passage of the plate 41, of a coding wheel 60 drawn against the face outside of the sheet 41 by an articulated arm with respect to the axis connecting the end of the gas jack stem with the element articulated compass, a cross-cutting post 70, a post of approach of sheet 80 constituted by rollers 81, located in the outside of the winch 10 and of rollers 82 located in the inside of it, in agreement with each other, a longitudinal welding post 90, with welding device internal 91 and external 92 and a motorized roller tractor 100

Examining in more detail figures 1 to 6, which illustrate the main stages of the procedure used, to the light of figures 7, 8 and 9, it is noted that a first ferrule 42 it is in principle carried out by dragging the sheet 41 of the coil 40 by fixed rollers 31 and pressurized 32 motorized and curved of said sheet 41 by the bending roller 33, which is positioned depending on the radius to obtain. Thus the beginning of the ferrule, it is then necessary to make the zero point of the development by the precise cut of the beginning of the band, and then to pass this one with successive introduction on the rollers 13 of the winch 10, until the perimeter corresponding to the diameter chosen be reached, the cutting post 70 then section the sheet band 41 to separate it from coil 40, performing then the vertical assembly and the corresponding welding, then the first ferrule 42 is finished. It is enough to then, as shown in Figure 2, weld a roof 44, and then, according to figure 3, ensure the elevation of the assembly, with the help of jacks 12 and rollers 13, at a height corresponding to the width of a sheet metal band, to allow, by successive coupling, the presentation of a new band of sheet 41 on the rollers 13 of the jacks 12 progressively lowered, as the passage of the sheet 41 takes place, as Figures 4 and 5 are shown, to obtain the realization of a second ferrule 43, which fully supports the first ferrule 42 equipped with its roof 44, as shown in figure 6, this proceeding at all points as indicated above for the realization of said first ferrule 42.

It is understood that the set constituted, then welding, by ferrules 42 and 43 and ceiling 44 can be raised again with the help of cats 12 associated with rollers that constitute the winch, in view of the addition of a third ferrule, proceeding as illustrated in figures 3 to 6.

When the newly developed takes place, to make the additional ferrule 43, the sheet band 41 is introduced, as just seen, under the first ferrule 42, and then approached with the help of rollers 81, 82 of the post approach 80, which goes on to press the ferrule 42 and the band of sheet metal 41. After postage of the last roller of the post of approach 80, a welding post 90 ensures welding by automatic points, as the advance of the sheet takes place. The passage of the sheet metal band 41 is stopped before each right foot of the winch 10, the cat 12 that supports the ferrule is lowered, the band advances to the next right foot, and so on. The cornice welding that ensures the union and the tightness between the two ferrules 42 and 43, is performed automatically by a station fixed (not represented).

During these operations, the ferrule rotates on itself with the help of 100 motorized roller tractors as well as under the action of motorized rollers 81, 82 of the post Approach 80.

Now examining figure 9 in relation to the Figures 7 and 8, it is highlighted that, after having entered the programmable automaton (not shown) data relating to ferrule diameters to be made and the length of bands to develop, corresponding to the perimeter of said ferrule 42, a automatic function positions the bending roller 33 by means of the cat 35, after introduction of the end of the sheet metal band 41 under said roller 33. After passing on roller 24, the sheet metal band 41 is introduced on winch 10, after step ahead of straightening means 23, 36, 37 and of curvature and pitch radius control 31, 32, 33 which will now be mentioned.

It stands out in principle, that the position of the bending roller 33 is controlled by proximity sensor 50, which measures, precisely, the distance that separates it from the external surface of the sheet metal band 41, which allows to obtain, by subtraction, the exact measurement, between the support rollers calibrated of the arrow communicated to the sheet metal band by the bending roller 33. Corrections, in more or less, are like this permanently transmitted automatically to the system 35 jack feed, which ensures the positioning of the roller bending 33. The coding wheel 60, as for itself, permanently transmits to the programmable controller by means of an incremental generator for example, that the same drag, the exact length of sheet metal band 41 already formed, in order to send, in a timely manner, the precise stoppage of the drag of the motorized rollers 31 and 32, which precedes the trigger control of the sectioned by the cross-sectional post 70, constituted by a guide 71 with motorized carriage 72, which supports a tool cut 73.

Referring now to the figures again 1 to 6 illustrating the procedure, it stands out that as it has already been previously mentioned:

1st)

The realization of ferrules 42, 43 is preceded by operations following:

to)

Manufacture of a fund 11 by oxicorte circular of an assembly of sheet metal strips, previously Solidarity laterally, with reference to a specific point C arbitrarily on the surface of this assembly of plates.

b)

Materialization of the axis of symmetry of the ferrules 42, 43 by welding a reference device, of vertical axis Y that coincides with the point C determined in the previous stage.

C)

Precise positioning, with respect to Y axis of the reference device, with the help of a template, of all the means that concur in the drag, the step, the guided, the approach and welding of the sheet metal bands and the  elevation of the assembly as the realization.

2nd)

The vertical position of the step rollers 13 of the jacks elevation 12 is remotely controlled very precisely, individually and collectively, depending on the progression of assembly operations and sequences imposed by is.

3rd)

The respective position of the internal welding devices 91 and external 92 is permanently indicated very precisely in the course of its use, with immediate indication of a monitor, of the displacements that may appear between the two welding devices 91, 92, so that this displacement can be immediately canceled in order to keep permanent a perfect match of welding points internal and external, when the cord progression of cornice welding.

4th)

The solidarity by welding the roof 44 on the edge corresponding of the upper ferrule 42 is accompanied by the 360 ° rotation of the assembly at a compatible controlled speed with the ideal progression of the weld bead.

5th)

The welding of the assembly on the bottom 11 is preceded by the setting in support of the lower ferrule, on movable studs that replace the step rollers 13, previously disassembled.

It is understood that to obtain a perfect parallelism of ferrules 42, 43 between them and with respect to background 11 used momentarily as a reference, cats 12 of maneuver of the step rollers 13 and the studs (no represented) must be of strictly identical characteristics and that the oil flows to which they are subjected, both to the input and output, must be perfectly controlled in order to get very precise careers of the stems of the cats

Claims (2)

1. Procedure for the realization of high capacity cylindrical metal tanks on site , from sheet metal coils (40) using a means (30) to drag, bend and pass the sheet metal band (41) as well as some means for cross-cutting (70), approach (80) and longitudinal welding (90) of the sheet metal bands, which consists of making the ferrules (42, 43) by bending, progressive folding according to the desired diameter, as that the dragging and development of the sheet metal band (41) takes place and in successively performing the ferrules (42, 43) from top to bottom making each of them (42) directly under the preceding one (43) dragging it in rotation by progressive solidarity of the sheet metal band in the process of forming, this solidarity being preceded by a progressive support also of the preceding ferrule (43) on the edge of the sheet metal band (41) in the process of passing through to complete completion of virol to next (42), the roof (44) being fixed on the upper edge of the first ferrule (42) after realization of this or the first two ferrules; the wall being in solidarity at the bottom (11) since it reaches the desired height, characterized mainly:

1st)

Because the realization of the ferrules It is preceded by the following operations:

to)

Realization of a fund (11) by circular cutting of an assembly of sheet metal bands, previously Solidarity laterally, with reference to a specific point C arbitrarily on the surface of this assembly of plates.

b)

Materialization of the axis of symmetry of the welding ferrules of a reference device, of axis vertical Y that exactly matches the point C defined on the bottom surface (11) in the preceding stage.

C)

Precise positioning, with respect to Y axis of the reference device, of all the means that they concur in the drag, the step, the guided, the approach and the welding of the sheet bands and to the elevation of the assembly a As the realization takes place.

2nd)

Because the vertical position of the step rollers (13) of the lifting means (12) is controlled at a very precise distance, individually and collectively, depending on the progression of assembly operations and the sequences imposed by them.

3rd)

Because the respective position of the Internal (91) and external (92) welding devices are indicated permanently very precisely in the course of your use, with immediate indication of the displacements may appear between the two devices, so that this displacement can be immediately canceled, in view of permanently retain a perfect agreement of the internal and external welding points, when the progression of the weld bead on cornice.

4th)

Because welding solidarity of the roof over the corresponding edge of the upper ferrule is accompanied by the rotation of the whole in 360º at a speed controlled compatible with the ideal progression of the cord welding.

5th)

Because the welding of the set over the bottom (11) is preceded by the support on tacos mobile of the free edge of the lower ferrule (43), of the disassembly of the step rollers (13), of the coordinated movement towards below said movable studs, until the support of said movable free edge of the bottom ferrule (43) over the bottom contour (11) after evacuation through the manhole of the unusable equipment for this final operation.

2. Device for carrying out the method according to claim 1, comprising means for dragging, bending (30) and permanent control (60) of bending and passing of the sheet metal band (41) as well as means of cross-section (70) of transverse welding, approach (80) and longitudinal welding (90) of the sheet, the means for dragging and bending the sheet band (41) consisting of two motorized rollers (31, 32) of which one is fixed (31) and the other (32) is attracted to it by a jack (34) and by a mobile roller (33) located downstream of the first two (31, 32) whose displacement is secured by a jack (35) as a function of the curvature to be given to the sheet, the means of permanent control of the bending and passage of the sheet strip (41) being constituted respectively by a proximity detector (50) and by a coding wheel (60); the passage means being constituted by rollers (13) associated with lifting jacks (12) distributed regularly on a circumference to constitute a winch (10) of diameter corresponding to that of the ferrule (42) to be obtained, these rollers (13 being) ) destined to progressively support the sheet (41) after bending, when its dragging takes place by a motorized roller tractor (100), characterized in that it comprises a programmable automaton remotely controllable by a wireless control box that governs the means of drag (31, 32, 34), bending (33, 35), cross-section (70), permanent control of the control and step (50, 60), cross-section (70), welding (90) and of support of the sheet in the course of passage (12, 13) as well as the tractor of motorized rollers (100) and by some detectors connected to a monitor that measures and represents, in real time, the possible differences of position in view upon immediate cancellation, c by entering the position of the electrodes of the welding devices (91, 92).