CN112050070B - System for constructing a separator by expanding and folding metal sheets - Google Patents

System for constructing a separator by expanding and folding metal sheets Download PDF

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Publication number
CN112050070B
CN112050070B CN202010508185.2A CN202010508185A CN112050070B CN 112050070 B CN112050070 B CN 112050070B CN 202010508185 A CN202010508185 A CN 202010508185A CN 112050070 B CN112050070 B CN 112050070B
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CN
China
Prior art keywords
protective film
folding
unfolding
metal sheet
roller
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Active
Application number
CN202010508185.2A
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Chinese (zh)
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CN112050070A (en
Inventor
尼古拉斯·洛兰
班诺特·莫雷尔
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Gaztransport et Technigaz SA
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Gaztransport et Technigaz SA
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Publication of CN112050070A publication Critical patent/CN112050070A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
    • B65H37/04—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching or stapling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/043—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/516—Securing handled material to another material
    • B65H2301/5161—Binding processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/173—Metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0648—Alloys or compositions of metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2154—Winding
    • F17C2209/2163—Winding with a mandrel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Physical Vapour Deposition (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention relates to a system (10) for producing a metal separator by unfolding and folding (15) a metal sheet, comprising: -a chassis (16); -at least one driving roller (23) mounted for rotary movement on said chassis (16) about a first horizontal axis to ensure advancement of the metal sheet in an advancing direction; -a plurality of forming members (25, 26) for angularly folding the first and second sides of the metal sheet, respectively, according to a determined angle with respect to the first axis of the driving roller (23); the unfolding and folding system further comprises a protective film deposition device (27), the protective film deposition device (27) being configured to deposit the protective film (14) on the metal plate.

Description

System for constructing a separator by expanding and folding metal sheets
Technical Field
The present invention relates to the field of sealed and thermally insulated tanks with membranes for storing and/or transporting fluids, such as cryogenic fluids.
In particular, the present invention relates to a system for constructing a diaphragm using expanded and folded metal sheets, aimed at constructing a sealing membrane for a fluid storage tank.
Background
In the prior art, in particular in the document FR2968284, there is a sealed and thermally insulated tank for storing liquefied natural gas, comprising a multilayer structure, i.e. from the outside to the inside of the tank comprising: a secondary insulating barrier, a secondary sealing membrane, a primary insulating barrier and a primary sealing membrane secured to the support structure. The secondary and primary insulation barriers are each formed from juxtaposed insulation caissons. The secondary sealing film and the primary sealing film each comprise a continuous metal plate. The metal plate comprises a flat central strip and raised side edges which are tightly welded to the weld brackets remaining on the insulated caisson.
As described in document FR3020773, these baffles are formed and deployed inside the tank by a deployment and folding system. The unfolding and folding system is capable of paying out the metal sheet in the can and simultaneously folding its sides to form a side raised barrier.
The system comprises: a driving roller for ensuring the expansion of the metal plate; a forming roller folding the side edges; and a bearing roller for pressing the metal plate against the forming surface of the forming roller. The forming rollers add a folding angle in the longitudinal direction of the machine tool to progressively fold the raised side edges of the sheet metal.
After the partition is formed and deployed in the tank and before the tank is filled with liquefied gas, the inner surface of the partition facing the inside of the tank is contaminated, for example, with dust, and the surface condition of the contaminants is lowered. In particular, the inner surface of the separator is likely to be covered with wood chips because the wood chips absorb surrounding moisture, thereby causing rust on the surface. Therefore, removal of such dust and potential rust marks prior to inspection and commissioning of the air reservoir creates additional surface treatment operations.
Disclosure of Invention
One idea on which the invention is based is to simply and reliably obtain a satisfactory metal separator surface state.
According to a first embodiment, the present invention provides a system for expanding and collapsing metal sheets to create a fluid storage tank sealing membrane metal separator;
the unfolding and folding system comprises:
-a chassis;
-at least one drive roller mounted for rotational movement on said chassis about a first horizontal axis to ensure advancement of the metal sheet in an advancement direction; and
-a plurality of forming members supported by the chassis, the members comprising at least a first forming member and a second forming member, the first side and the second side of the sheet metal being folded according to a determined angle relative to the first axis, respectively; the unfolding and folding system further includes a protective film and a protective film deposition device configured to deposit the protective film on the metal plate.
Therefore, with such a system, the separator is protected by the protective film before inspection of the air tank, so that a satisfactory metal separator surface state is obtained.
In addition, the deposition of the protective film is performed simultaneously with the expansion and folding of the separator, so that its influence on the production time of the separator is negligible.
According to other advantageous embodiments, such a folding system has one or more of the following features.
According to one embodiment, the protective film deposition apparatus is mounted on the chassis.
According to one embodiment, the forming member is a forming roll.
According to one embodiment, the protective film deposition device is located downstream of the forming member in the advancing direction.
According to one embodiment, the protective film deposition apparatus deposits the protective film on the flat central strip of the metal plate,
a flat central strip is formed between the first side and the second side. Therefore, the protective film is less likely to interfere with the subsequent welding operation of the separator.
According to one embodiment, a protective film deposition apparatus includes:
-a reel around which a protective film is wound, said reel being mounted for rotational movement on the chassis; and
-an upper roller mounted for rotational movement about a second axis of rotation, the first and second forming members being positioned laterally on either side of the upper roller, the first and second forming members (25, 26) projecting according to a direction of advance in a plane orthogonal to the direction of advance and passing through the second axis, such that the upper roller can press the protective film against the flat central strip.
According to one embodiment, the second axis of rotation is parallel to the first axis of rotation.
According to one embodiment, the protective film deposition apparatus further comprises a lower roller rotatably movable about a third rotation axis parallel to the second rotation axis, the lower roller being located below the upper roller and arranged to allow the flat central belt and the protective film to pass between the lower roller and the upper roller.
According to one embodiment, one of the upper and lower rollers is mounted for vertical movement on the chassis and the stress member exerts a force on the upper or lower roller having a vertical component directed toward the other of the upper and lower rollers.
According to one embodiment, the protective film is made of a material selected from the group consisting of polyolefin (e.g., polyethylene and polypropylene), polyester and polyethylene material (polyvinyl chloride or polyvinyl acetate).
According to one embodiment, the protective film is electrostatically charged or has an adhesive coated surface.
According to one embodiment, the invention also provides a baffle method for expanding and folding a metal sheet to create a sealing membrane for constructing a fluid storage tank, the method comprising:
-unwinding the metal sheet on a reel and ensuring advancement of the metal sheet along an advancement direction by means of at least one driving roller that is rotationally movable according to a first horizontal axis;
-folding the first side and the second side of the metal sheet according to a determined angle with respect to the first axis;
-depositing a protective film on the metal sheet while the metal sheet is being expanded.
According to one embodiment, the protective film is deposited on a flat central strip of metal sheet, the flat central strip being located between the first side and the second side.
According to one embodiment, the protective film is deposited 2 to 7cm from the first side and the second side.
According to one embodiment, the expansion of the metal plate, the folding of the first and second sides of the metal plate, and the deposition of the protective film are all performed within the air reservoir.
Drawings
The invention will be better understood and other objects, details, features and advantages will become more apparent by way of illustrative and non-limitative description of several specific embodiments of the invention with reference to the accompanying drawings.
FIG. 1 is a partial cut-away perspective view of a sealed insulated tank wall including a sealing membrane composition with a baffle.
Fig. 2 is a schematic cross-sectional view of a separator equipped with a protective film.
Fig. 3 is a schematic diagram of an unfolding and folding system.
Fig. 4 is a schematic view of a lateral mass of a first forming unit of the unfolding and folding system of fig. 3.
Fig. 5 is a schematic view of a lateral block of the final forming unit of the unfolding and folding system of fig. 3.
Fig. 6 is a schematic view of a planar cross section of fig. 3 taken normal to the advancement of the metal sheet.
Detailed Description
Conventionally, the terms "exterior" and "interior" are used to define the relative position of one element with respect to another, i.e., with respect to the interior and exterior of the tank.
Figure 1 shows the wall of a sealed insulated tank. The sealed and thermally insulated tank is for storing a liquefied gas selected from, for example, liquefied Natural Gas (LNG) and liquefied petroleum gas (lpg).
The tank wall comprises a supporting structure 1 from outside to inside; a secondary thermal insulation barrier 2 formed by an insulated caisson 3, the insulated caisson 3 being juxtaposed on the support structure 1 and anchored to the support structure 1 by secondary fixing members 4; a secondary sealing membrane 5 supported by the thermally insulated caisson 3; a primary heat insulation barrier 6 consisting of the heat insulation caisson 7, wherein the heat insulation caisson 3 is arranged on the secondary sealing film 5 in parallel and is fixed on the primary sealing film 5 through a primary fixing member 8; and a primary sealing membrane 9 supported by the thermally insulated caisson 7 for contact with the liquid in the tank.
The support structure 1 may be in particular a self-supporting metal plate, generally any type of rigid partition plate having suitable mechanical properties. The support structure may in particular be constituted by a hull or a double hull. The support structure includes a plurality of tank walls defining an overall form of the air reservoir.
Each insulated caisson 3, 7 has a substantially rectangular parallelepiped shape. Each insulated caisson 3, 7 comprises parallel bottom and cover plates. The support net is inserted at right angles between the base plate and the cover plate. The support webs are placed parallel to each other and form a compartment between them for receiving the powdered insulating lining board.
The primary sealing film 9 and the secondary sealing film 5 are composed of continuous sheets of metal plates 10, and the metal sheets 10 are alternately placed with a welding bracket 11 welded thereto.
For example, the metal plate 10 is made ofAnd (3) manufacturing: that is, alloys of iron and nickel typically have coefficients of expansion at 1.2.10 -6 And 2.10 -6 K -1 While other metals or alloys are possible, such as stainless steel, aluminum or high manganese iron alloys with a coefficient of expansion of 7.5.10 -6 K -1 Left and right.
Each metal plate 10 comprises in width a flat central strip 12 for supporting the thermally insulated caissons 3, 7 and the cover plates of the raised sides 13. The raised sides 13 are at right angles to the flat central strip 12. The purpose of the metal plate 10 is to extend fully from one end of each wall of the tank to the other. The raised sides 13 of the metal plate 10 are tightly welded to the welding brackets 11 held on the thermally insulated caissons 3, 7.
As shown in fig. 2, the metal plate 10 of the primary sealing film 8 is provided with a protective film 14 on its inner surface (i.e., the surface in contact with the liquefied gas) when it is unfolded. The protective film 14 serves to protect the metal plate 10, in particular from dust, during the production of the tank and to remove it before the tank is put into use, i.e. before it is first filled with liquefied gas.
It is also possible to cover the metal plate 10 of the secondary sealing membrane 5 with a protective membrane 14, which protective membrane 14 is removed before the insulating caisson 7 of the primary insulation barrier 6 is in place.
The protective film 14 is located on the inner surface of the flat metal strip 12 of the metal plate 10 and does not cover the convex side 13 thereof. In this way, the protective film 14 does not interfere with the welding of the projecting side 13 to the welding carriage 11. This has the advantage that the protective film 14 is positioned at a distance of 2 to 7cm, for example about 5 cm, from each of the two raised side edges 14. Therefore, the protective film 14 is sufficiently spaced from the convex side 13 so as not to be damaged by the welder in which the convex side 14 is welded to the welding bracket 11. In particular, this distance allows the protective film 14 to be protected from damage by the rollers of the electrode wheel welder, nor from the raised side edge heating due to electrode wheel welding.
The protective film 14 is made of a polymer. This has the advantage that the protective film 14 is made of a polyolefin, such as polyethylene and polypropylene, a polyester or polyethylene material, such as polyvinyl chloride (PVC) or polyvinyl acetate.
The protective film 14 has the advantage of a thickness of between 0.05 and 1 mm, for example about 0.1 mm.
According to one embodiment, the protective film 14 is attached to the metal plate 10 by electrostatic adhesion, in which case the protective film has the advantage that its material is polyvinyl chloride.
According to another embodiment, the protective film 14 is attached to the metal plate 10 by an adhesive. For example, the adhesive is selected from the group consisting of acrylic, silicone or rubber in the form of an emulsion or solution.
Referring to fig. 3, we observe a system for expanding and folding 15 a sheet of metal to produce a sheet of metal 10.
The unfolding and folding system 15 comprises a chassis 16, a series of forming units 17, 18, 19 supported by the chassis 15 and a reel support element 34.
The chassis 16 is equipped with wheels 20 to allow displacement of the unfolding and folding system 15.
The metal sheet to be unwound is supplied in the form of a reel 21, the reel 21 being mounted for rotational movement on a reel support member 17. The unfolding and folding system 15 further comprises a guiding means 22 adapted to ensure that the metal sheet has a minimum radius of curvature between the reel 21 and the forming units 17, 18, 19, so as to ensure that the metal sheet is not damaged during the unfolding. In the embodiment shown in fig. 3, the guide 22 is an element with a curved guide surface. The curved guide surface may obviously be provided with a plurality of rollers mounted for rotation to reduce friction between the curved guide surface and the metal sheet to be expanded.
The forming units 17, 18, 19 may simultaneously spread the metal sheet in the advancing direction (arrow f 1) to form the convex side 13 of the metal sheet 10. The forming units 17, 18, 19 progressively fold the raised side edges 13 of the metal sheet in successive steps until the desired final configuration position is established, said raised side edges 13 extending in a right angle manner in the final configuration to the flat central strip 12 upon exiting the final forming unit 19.
In the embodiment shown, the unfolding and folding system 15 is provided with three forming units 17, 18, 19. Furthermore, for example, the first forming unit 17 folds the metal sheet 30 ° relative to the side edges of the flat central strip 12, the second forming unit 18 folds the metal sheet back 60 °, the third forming unit 19 and the last forming unit 19 fold the side edges back into their final configuration in which the side edges extend substantially at right angles to the flat central strip 12.
Each forming unit 17, 18, 19 comprises two side blocks. A schematic view of one of the side blocks of the first forming unit 17 is shown in fig. 4. The side blocks of the second forming unit 18 are substantially identical to the side block structure shown, with only the angle of inclination of the forming surfaces being different.
Each side block comprises a bottom driving roller 23, which bottom driving roller 23 is mounted rotatably movable on the chassis about a horizontal axis and is intended to ensure advancement of the metal sheet in the advancing direction f 1. The driving roller 23 is driven to rotate by an electric motor, not shown, through a transmission, not shown. Each side block further comprises an upper bearing roller 24, which upper bearing roller 24 is mounted on the chassis for rotational movement along a horizontal axis parallel to the horizontal axis of the drive roller 23. The bearing roller 24 extends to the driving roller 23 facing the metal plate and keeps the metal plate in contact with the driving roller 23. In addition, each side block includes a forming roller 25 mounted for rotational movement relative to the chassis 16 so that the sides of the sheet metal can be folded back. For this purpose, the forming roller 25 has a forming surface inclined with respect to the horizontal axis to fold the side edges of the metal plate according to a determined angle. The forming surface of the forming roller 25 presses the side edge of the metal plate against the bearing roller 24 to form it.
As shown in fig. 4, the forming rolls 25 of the remaining forming units 17, 18 are in conical or thrust conical rotation, except for the forming roll of the last forming unit 19. Each forming roller 25 is moved in rotation about the central axis of the cone. Thus, the folding angle of the forming roller 25 corresponds to the intersection of the conical surface generatrix with the horizontal plane forming an angle. As an example, the conical surface of the forming roller 25 of the first forming unit 17 is inclined at an angle of 30 ° with respect to the horizontal, whereas the conical surface of the forming roller 25 of the second forming unit 18 is inclined at an angle of 60 ° with respect to the horizontal.
The last forming roll 26 of the forming unit 19, one of which forming roll 26 is shown in fig. 5, is partly a cylindrical forming surface. The forming roller 26 is mounted for rotational movement about the central axis of the cylinder. The base line of the cylindrical forming surface is vertical so that the forming roll 26 folds the raised sides of the sheet metal back at right angles to the flat central strip 12.
Further details concerning the structure and operation of the forming units 17, 18, 19 can be found in reference FR3020773.
Returning to fig. 3, it can be seen that the unfolding and folding system 15 further comprises a protective film deposition device 27 mounted on the chassis 16. The protective film deposition apparatus 27 includes a support member 28 on which a spool 29 is rotatably mounted. The protective film 14 is wound on the reel 29. The support element 28 is oriented such that the axis of the reel 29 is horizontal and parallel to the axis of the drive roller 23 of the forming unit 17, 18, 19.
Further, the protective film deposition apparatus 27 includes at least two rolls, i.e., a lower roll 30 and an upper roll 31, vertically positioned on either side of the metal plate 10. The upper roller 30 and the lower roller 31 are mounted for rotational movement about respective axes which are horizontal and parallel to the axes of the drive rollers of the forming units 17, 18, 19.
In the illustrated embodiment, the protective film deposition device 27 is positioned at the output of the final forming unit 19, i.e., at a position downstream of the final forming unit 19 in the advancing direction of the metal sheet f 1. The upper roller 31 has a length smaller than that of the flat central strip 12 and is positioned to face the flat central strip 12 of the metal sheet 10 between the raised side edges 12. In other words, as shown in fig. 6, the forming rollers 25, 26 are projected on a plane orthogonal to the advancing direction, pass through the rotation axis of the upper roller 31, and are positioned on both sides of the upper roller 31. As shown in fig. 6, the protruding portion of the forming roll is indicated by a broken line.
To deposit the protective film 14, one end of the protective film 14 is located between the upper roller 31 and the flat center belt 12 of the metal plate 10. Thus, the protective film 14 is pressed against the flat center belt 12, so that when the metal plate is unwound, the reel 29 is unwound and the protective film 14 is deposited on the flat center belt 12.
Advantageously, the upper roller 31 is vertically movable in order to ensure that the protective film 14 is pressed against the plate with sufficient force. In addition, the stress member 33 applies a load having a vertically downward component on the upper roller 31. For example. The stress member 33 is an elastic member or a power cylinder.
Alternatively, the pivot axis of the upper roller 31 is fixed relative to the chassis 16, while the lower roller 30 is vertically movable relative to the chassis 16 of the display and folding system 15. In this case, the stress member exerts a force on the lower roller 30 in the opposite direction, i.e. the force has a vertically upward component.
According to one embodiment, the lower roller 30 is also rotated by a motor drive through a transmission not shown.
While the invention has been described in terms of several specific embodiments, it is evident that the invention is in no way limited thereto, and that the invention encompasses all technical equivalents of the apparatus and combinations thereof if the method pertains to the invention.
Use of the verb "to comprise" or "to comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims (12)

1. An expansion and folding system (10) for a metal separator (10) for constructing a fluid storage tank sealing membrane using expansion and folding (15) of a metal sheet, the expansion and folding system (15) comprising:
-a chassis (16);
-at least one driving roller (23) mounted for rotary movement on said chassis (16) about a first horizontal axis to ensure advancement of said metal sheet in an advancement direction; and
-a plurality of forming members (25, 26) supported by the chassis and comprising at least a first forming member and a second forming member, folding a first side and a second side of the metal plate according to a determined angle with respect to the first horizontal axis, respectively; the unfolding and folding system (15) further comprises a protective film (14) and a protective film deposition device (27), the protective film deposition device (27) being mounted on the chassis (16), the protective film deposition device (27) being configured to deposit the protective film (14) on the metal sheet, the protective film deposition device (27) being arranged to deposit the protective film (14) on a flat central strip (12) of the metal sheet (10), the flat central strip (12) being formed between the first side and the second side (13).
2. The unfolding and folding system (15) according to claim 1, characterized in that said protective film deposition device (27) is located in a position downstream of said forming members (25, 26) along said advancing direction.
3. The unfolding and folding system (15) according to claim 1, characterized in that said protective film deposition device (27) comprises:
-a reel (29) on which said protective film (14) is wound, said reel (29) being rotatably mounted on said chassis (16); and
-an upper roller (31) mounted for rotational movement about a second axis of rotation, said first (25) and second (26) forming members being positioned laterally on either side of said upper roller (31), said first (25) and second (26) forming members projecting according to a direction of advancement on a plane orthogonal to said direction of advancement and passing through said second axis of rotation, such that said upper roller (31) can press said protective film (14) against said flat central strip (12).
4. A spreading and folding system (15) according to claim 3, wherein the protective film deposition device (27) further comprises a lower roller (30) mounted to move about a third rotation axis parallel to the second rotation axis, the lower roller (30) being located below the upper roller (31) and being arranged to allow the flat central band (12) and the protective film (14) to pass between the lower roller (30) and the upper roller (31).
5. The unfolding and folding system (15) according to claim 4, characterized in that one of the upper roller (31) and the lower roller (30) is mounted vertically movable on the chassis and that the strain member exerts a force on the upper roller (31) and the lower roller (30) with a vertical component directed towards the other of the upper roller (31) or the lower roller (30).
6. The unfolding and folding system (15) according to claim 1 or 2, characterized in that said protective film (14) is made of a material selected from polyolefin, polyester and polyethylene-based materials.
7. The unfolding and folding system (15) according to claim 1 or 2, characterized in that said protective film (14) is electrostatically charged or has an adhesive-coated surface.
8. An unfolding and folding method for unfolding and folding a metal sheet to produce a baffle for constructing a sealing membrane of a fluid storage tank, the unfolding and folding method comprising:
-unwinding the metal sheet on a reel (29) and ensuring advancement of the metal sheet along an advancement direction by means of at least one driving roller (23) which is rotationally movable according to a first horizontal axis;
-folding the first and second sides (13) of the metal sheet according to a determined angle with respect to the first horizontal axis;
-depositing a protective film (14) on said metal sheet while it is being unwound, said protective film (14) being deposited on a flat central strip of said metal sheet, which is located between said first side and said second side (13).
9. The unfolding and folding method according to claim 8, characterized in that said protective film (14) is deposited at a distance of 2 to 7cm from said first and second sides (13).
10. The unfolding and folding method according to claim 8 or 9, characterized in that said protective film (14) is made of a material chosen from polyethylene and polyethylene compounds.
11. Unfolding and folding method according to claim 8 or 9, characterised in that said protective film (14) is provided with static electricity or with a surface intended to be pressed against a metal plate coated with an adhesive.
12. The unfolding and folding method according to claim 8 or 9, characterized in that the unfolding of the metal sheet, the folding of the first and second sides (13) of the metal sheet, the deposition of the protective film are all performed inside the tank.
CN202010508185.2A 2019-06-06 2020-06-05 System for constructing a separator by expanding and folding metal sheets Active CN112050070B (en)

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FR1906002 2019-06-06
FR1906002A FR3096906B1 (en) 2019-06-06 2019-06-06 System for unwinding and folding a metal sheet to make a strake

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FR3096906B1 (en) 2021-06-11
CN112050070A (en) 2020-12-08
SG10202005295XA (en) 2021-01-28
KR20200140732A (en) 2020-12-16
RU2020118307A (en) 2021-12-03

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