JP2022531180A - Corrugated corner parts for constructing the closed membrane of the tank and bending system for forming corrugations in the corner parts - Google Patents

Abstract

The present invention relates to a corner piece (2) for constructing a sealing membrane (3) for a tank, the corner piece (2) comprising a first flange (11) and a second flange (12) and a second flange (11) and a second flange (12). The first flange (11) and the second flange (12) are inclined to each other at an angle α of 1° to 179° and join at the level of the bend line (13), the corner piece (2) with a corrugation (17) A corrugation (17) intersects the bend line (13) and extends from one end of the corner piece (2) to the other, the corrugation (17) forming a first flange (11) on the first flange (11). a portion (18) of, a second portion (19) and a central portion (20) formed astride the first flange (11) and the second flange (12), the central portion (20) has an inverted W-shaped profile in cross-section on a plane passing through the bend line (13), with a concave indentation (24) and transverse to each side of the concave indentation (24). It comprises two convex projections (22, 23) arranged in a direction. [Selection drawing] Fig. 11

Description

The present invention relates to corrugated corner components for constructing closed membranes for tanks that store fluids such as liquefied gas.

The present invention also relates to a bending system for manufacturing such corrugated corner parts.

In the prior art, a closed insulating tank for storing liquefied gas with a corrugated closed membrane configured to contact the liquefied gas stored in the tank and to seal the tank is disclosed. The closed membrane includes a metal plate, which projects towards the inside of the tank and allows the sealed membrane to be deformed by thermal and mechanical loads, especially due to the liquefied natural gas stored in the tank. Includes a series of vertical corrugations.

The sealing membrane includes corner parts that are welded to adjacent metal plates at the junction between the two walls of the tank to ensure continuous sealing. The corner parts include two flanges that are inclined relative to each other and joined at the level of the intersection. The corner component includes a corrugation extending from one end of the corner component to the other end perpendicular to the intersection so that the corner component can be deformed laterally parallel to the intersection.

This type of corner component is specifically described and shown in Ref. WO 2016030619. The corner parts described in this document are corrugations including first and second parts formed on the first and second flanges of the corner parts, respectively, and the first and second parts. It has a central part that straddles the intersection extending between and. The first and second portions and the central portion have a substantially semi-elliptical or substantially triangular profile. Corner parts are susceptible to high loads given the sloshing phenomenon, that is, mounting in the zone of the tank, which is most susceptible to the movement of cargo inside the tank.

One of the ideas forming the basis of the present invention is to present corner parts aimed at constructing a closed membrane for a tank that stores a fluid that can be more mechanically resistant to sloshing phenomena. be.

Another idea forming the basis of the present invention is low manufacturing cost, high fatigue strength, high flexibility to tow on the axis of the bend line, and / or to rotation around the axis of the bend line. Presenting highly flexible corner parts.

The present invention is, in one embodiment, corner parts for constructing a sealed membrane for a tank, the corner parts tilting each other at an angle α of 1 ° to 179 ° and joining at the level of a bend line. Including the first flange and the second flange, the corner part contains a corrugation, which intersects the bend line and extends from one end to the other end of the corner part, whereby the corner part crosses the corrugation. Constructed to be directionally deformable, the corrugations are formed on the first flange and the second flange, which is formed on the first flange and extends from the first edge of the corner component towards the bend line. A second portion extending from the second edge of the corner part toward the bending line, and the first flange and the second flange are formed so as to form the first portion and the second portion. It comprises a central portion extending in between and arranged side by side with a first portion and a second portion, the central portion having an inverted W-shaped profile in a cross section on a plane passing through a bending line. , The profile comprises a concave recess and two convex protrusions laterally arranged on each side of the concave recess.

Therefore, considering the shape of the corner part having such a central part, especially the fact that it protrudes toward the inside of the tank at a lower height than the central part in the conventional corner part, the sloshing phenomenon occurs. It is advantageous in that it is not easily affected. Such corner parts also have better fatigue strength.

In addition, such a central portion provides the corner component with greater flexibility for towing on the axis of the bend and / or rotation around the axis of the bend. This makes it possible to reduce the force applied to the corners of the tank due to phenomena such as heat shrinkage of the sealing membrane and / or deformation of the ship beam.

In the present specification, the expression "plane passing through a bending line" means that the bending line is in the plane. Moreover, this plane is advantageously the median, i.e. divides the angle formed by the first and second flanges into two equal half-widths.

In another advantageous embodiment, such corner components may have one or more of the following features:

In one embodiment, the corner part has a geometric configuration that can be flattened out in the form of a rectangular part. In other words, the composition of the corner part in the corrugation zone is such that the first part, the second part and the central part do not change the length of the material in the corner part, and therefore also its thickness. It is configured so that it never happens.

In one embodiment, the lower end of the concave recess is arcuate or elliptical arcuate.

In one embodiment, the depth and thickness of the concave recess decrease from the bend line to the first portion, leading to the apex of the first portion and from the bend line to the second portion in the direction of corrugation. Leads to the apex of the second part.

In one embodiment, the first portion, the second portion and the convex protrusions project inward at an angle α.

In one embodiment, the first and second portions have a semi-elliptical or triangular profile with a constant height.

In one embodiment, the first flange and the second flange have a substantially rectangular shape.

In one embodiment, the invention also provides a closed insulating tank for storing fluid comprising a closed membrane, the closed membranes being welded together, including at least one corrugation protruding into the closed insulating tank. It comprises a plurality of corrugated metal plates and at least one of the above corner components connecting the metal plates of the hermetic membrane at the junction between the two walls of the hermetically sealed insulation tank.

In one embodiment, such a tank forms, for example, part of an onshore storage facility for storing LNG, in particular a methane tanker vessel, a floating storage regasification unit (FSRU), a floating production storage load. It may be installed on a coastal or deep sea floating structure such as a unloading (FPSO) unit.

In one embodiment, the invention provides a ship for transporting a fluid comprising a double hull and the tank disposed within the double hull.

In one embodiment, the invention also provides a method for loading and unloading a ship as described above, wherein the method is from a floating or land storage facility to the tank of the ship or from the tank of the ship. Includes sending fluid to a float or land storage facility via an insulating pipe.

In one embodiment, the invention also provides a fluid transport system, which is arranged to connect the ship and a tank installed in the double vessel of the ship to a floating or land storage facility. It is provided with an insulated pipe and a pump for creating a flow of fluid through the insulated pipe from the floating or land storage facility to the tank of the ship or from the tank of the ship to the floating or land storage facility.

In one embodiment, the invention provides a bending system for forming the corner parts, the bending system including an upper frame that moves vertically with respect to each other between a dormant position and a bending position. With a lower frame and two lower die cushions, each with a first and second bearing surface configured to tilt relative to each other at an angle α and to receive the first and second flanges of the corner components, respectively. There are two lower die cushions mounted to slide laterally on the lower frame between the proximity and separation positions, and the first and lower die cushions mounted on the upper frame. It comprises two moving assemblies, respectively arranged opposite to a second bearing surface, each moving assembly being fixed to a support and a support of a first flange and a second flange of a corner part. Each upper die cushion comprises a punch configured to form a first or second portion of corrugation on one or the other, and two upper die cushions laterally arranged on either side of the punch. Has a main structure and a clamp plate having clamp surfaces arranged parallel to one of the first and second bearing surfaces of the lower die cushion, thereby at an intermediate clamp position. The clamping surface is configured to press a corner component against one of the first and second bearing surfaces of the lower die cushion to clamp it, and the clamping plate is mounted so that it slides laterally over the main structure of the upper die cushion. Each upper die cushion is attached to the support of the moving assembly so that it can be moved in a direction orthogonal to the clamping surface of the upper die cushion, whereby the upper die cushion is moved upward from the resting position to the bending position. As soon as the upper die cushion reaches the intermediate clamp position while moving relative to the frame, the upper die cushion is configured to move relative to the upper frame in a direction perpendicular to the clamping surface. The support of the moving assembly is attached to the upper frame so that it can be moved in a direction parallel to the longitudinal direction of the punch of the moving assembly, and the bending system further includes a device for deforming the bending line to deform the bending line. The device is a central finger located opposite the intersection between the bend line and the corrugation being formed, supported by the lower frame and forming a concave recess. A central finger configured to form and two fingers laterally arranged on each side of the central finger and configured to deform the bending line, which are movably attached to the upper frame and have two protrusions. It comprises two fingers arranged to form one and the other of the projections, respectively.

Therefore, such a bending system is simplified, especially thanks to a device that deforms a preformed bend line, and a complex shaped punch for handling corrugation deformation in zones close to the preformed bend line. No need to use.

In one embodiment, the two fingers are attached to a finger support, which is moved by an articulated coupling mechanism to the upper frame and at least two upper die cushions of one of the moving assemblies. Scientifically connected, the articulated coupling mechanism is configured to form a reduction measure, which is the upper side for vertical relative movement between the upper and lower frames of the finger support. It is possible to reduce the vertical relative movement of the finger support when the upper die cushion is in the clamp position while the relative movement from the rest position to the bending position is being performed between the frame and the lower frame. Is.

In one embodiment, it is necessary to use a dedicated actuator to uncorrelate the vertical movement of the fingers from the movement of the upper frame, thanks to the articulated coupling mechanism of the device that deforms the preformed bend line. do not have.

In one embodiment, the articulated coupling mechanism comprises at least a first group of four links, the first group of four links articulating to the upper frame around the first geometric axis. A first upper link connected to, a second upper link articulated to the upper frame around a second geometric axis, and one movement around a third geometric axis. A first lower link articulated to one of the upper die cushions of the assembly and articulated to another of the upper die cushions of the moving assembly around a fourth geometric axis. The first upper link and the first lower link are articulated to each other around a fifth geometric axis, including the second lower link, and the second upper link. And the second lower link are articulated to each other around a sixth geometric axis, the first, second, third, fourth, fifth and sixth geometric axes. Is parallel in the horizontal direction orthogonal to the preformed bend line, and the finger support is connected to the first upper link and / or the first lower link by the first slide connection on one side. On the other side, the second slide connection is connected to the second upper link and / or the second lower link, and the first slide connection and the second slide connection are It is arranged to support the finger support in the vertical direction.

In one embodiment, the first slide connection comprises a first physical spindle connected to a first upper link and / or a first lower link, the first physical spindle being a finger support. Attached to slide within the formed first slideway, the second slide connection is a second physical spindle connected to a second upper link and / or a second lower link. The second physical spindle is mounted to slide within the second slideway formed in the finger support.

In one embodiment, the first slideway and the second slideway extend horizontally.

In one embodiment, the first physical spindle extends along a fifth geometric axis and the second physical spindle extends along a sixth geometric axis.

In one embodiment, the first and second geometric axes extend to the first horizontal plane, the third and fourth geometric axes extend to the second horizontal plane, and the fifth and sixth. The geometric axis of is extended to a third horizontal plane arranged vertically between the first horizontal plane and the second horizontal plane.

In one embodiment, the two fingers are mounted so as to slide laterally on the finger support. In one embodiment, the two fingers are mounted so as to slide between the separated position and the close assembly position. In one embodiment, the two fingers are urged towards their separation position by one or more return members.

In one embodiment, the ends of the fingers are spherical.

In one embodiment, the finger is removably secured to a finger support.

In one embodiment, the articulated coupling mechanism is removably secured to the upper frame, upper die cushion and finger support.

In one embodiment, the ends of the central finger are spherical.

In one embodiment, the central finger is detachably secured to the lower frame.

The invention is better understood in the following description of some particular embodiments of the invention provided by way of illustration only, with reference to the accompanying drawings, with other purposes, details, features and The benefits will be clearer.

It is a partial view of a closed insulation tank for storing a fluid according to one embodiment in a corner zone between two walls. It is a perspective view of the bending system configured to form a corrugation in a corner part, and shows the intermediate position which clamps a corner part. It is a side view of the bending system of FIG. 2, and shows the resting position. It is a cut-out perspective view of the bending system of FIG. 2, and shows the intermediate clamp position. Another cut-out perspective view of the bending system of FIG. 2 shows the intermediate clamp position. It is sectional drawing along the PVI plane of the bending system of FIG. FIG. 3 is a detailed perspective view of a finger configured to deform a preformed bend line of a corner component. It is a detailed view of the lower frame and shows the detail of the central finger configured to deform the preformed bend line of a corner part. It is a detailed view of the central finger of FIG. It is a detailed view of the fixing of the moving assembly to the upper frame. It is a perspective view of the corner component which concerns on 1st Embodiment. FIG. 11 is a schematic profile of a bending line profile between a first flange and a second flange of a corner component of FIG. It is a perspective view of the corner component which concerns on 2nd Embodiment. It is a perspective view of the corner component which concerns on 3rd Embodiment. It is a cut-out schematic diagram of the tank of a methane tanker ship and the loading / unloading terminal of this tank.

The bending system 1 and related usage described below are for manufacturing parts such as corner parts 2 for constructing a closed membrane 3 of a closed heat insulating tank for storing liquefied gas.

To give an example, FIG. 1 shows the structure of a closed insulation tank with such corner components 2 at the level of the corners formed between the two walls of the tank. Each wall of the tank has a secondary insulation barrier 5 including a support structure 4 and a heat insulating block held against the support structure 4 and fixed to the support structure 4 by a secondary holding member from the outside to the inside of the tank. The primary heat insulating barrier 7 including the secondary sealing membrane 6 that abuts on the heat insulating block of the secondary heat insulating barrier 5, the heat insulating block fixed to the secondary sealing membrane 6 by the primary holding member (not shown), and the heat insulating block of the primary heat insulating barrier 7. It includes a primary sealing membrane 3 configured to abut and contact the liquefied gas contained in the tank.

The primary sealing membrane 3 includes a plurality of corrugated metal plates 8 welded to each other. Each metal plate 8 includes a first series of parallel, so-called low, corrugations 9 and a second series of parallel, so-called high, corrugations 10. The first series of corrugations 9 is perpendicular to the second series of corrugations 10. In the present specification, corrugations 9 and 10 project toward the inside of the tank.

The primary sealing membrane 3 includes a corner component 2 in a corner zone formed at the intersection between two adjacent walls of the tank.

Such a corner component 2 is shown in detail in FIG. The corner component 2 is obtained by bending a metal plate. The corner parts are preferably made of the same material as the material of the metal plate 8. The metal plates are, in particular, stainless steel, aluminum, Invar®, ie iron and nickel with expansion coefficients typically 1.2 × 10 ^-6 K ^-1 to 2 × 10 ^-6 K ^-1 . It can be made from an alloy of the above, or an iron alloy containing a large amount of manganese having an expansion coefficient on the order of 7 × 10 ^-6 K ^-1 . However, other metals or alloys are possible as well. As an example, the metal plate has a thickness of about 1.2 mm. Knowing that the thicker the metal plate, the higher its cost and the higher the rigidity of the corner component 2, other thicknesses can be considered in the same manner.

As shown in FIG. 11, the corner component 2 includes a first flange 11 and a second flange 12 that are inclined with respect to each other and joined at the level of the bend line 13 or the intersection. The angle α formed between the first flange 11 and the second flange 12 is 90 ° in the embodiment shown in FIG. However, generally speaking, the angle α is 1 ° to 179 °, and more specifically, 90 ° to 179 °, depending on the geometric shape of the tank. The first flange and the second flanges 11 and 12 each have a substantially rectangular parallelepiped shape and therefore face each other with the two parallel side edges 14 and 15 of the first flange and the second flanges 11 and 12. Includes the edge portion 16 to be formed.

The corner component 2 includes a corrugation 17 that provides flexibility that allows it to be deformed by the effects of thermal and mechanical loads generated by the liquefied gas stored in the tank. The corrugation 17 extends from one end of the corner component 2 to the other end perpendicular to the bending line 13. Therefore, the corrugation 17 makes it possible for the corner component 2 to be deformed in the lateral direction parallel to the bending line 13. The corrugation 17 projects toward the inside of the convex angle α formed between the first flange and the second flanges 11 and 12 of the corner component 2. Therefore, the corrugation 17 projects toward the inside of the tank when the corner component 2 is arranged at a predetermined position in the tank.

As shown in FIG. 1, the corner component 2 is arranged such that its corrugation 17 coincides with one of the corrugations 9 of adjacent metal plates 8 on one and the other wall. In order to ensure continuous sealing at the level of the corner zone, the corner component 2 is welded to the adjacent metal plate 8.

Returning to FIG. 11, the corrugation 17 is formed on the first flange 11 and parallel to the side edges 14 and 15, and the corrugation 17 is formed on the second flange 12 and parallel to the side edges 14 and 15. The second portion 19 is divided into three parts, a central portion 20 located between the first portion 18 and the second portion 19, and the central portion 20 is divided into a first flange 11 and a second portion. It can be seen that it straddles the flange 12 of 2 and thus includes the bending line 13 between the first flange 11 and the second flange 12.

The first portion 18 extends from the edge portion 16 of the first flange 11 toward the bending line 13. Similarly, the second portion 19 extends from the edge portion 16 of the second flange 12 toward the bending line 13. The first portion 18 and the second portion 19 project inward of the convex angle α formed between the first flange 11 and the second flange 12. The first portion 18 and the second portion 19 have a profile having a substantially triangular or substantially semi-elliptical shape.

FIG. 12 shows the profile of the bend line 13 between the first flange 11 and the second flange 12. This profile has a deformation zone 21 having a substantially inverted W-shape, which is the intersection of the bend line 13 with the axes of the first and second portions 18 and 19 of the corrugation 17. It is symmetric with respect to the part. The deformation zone 21 is characterized by two convex protrusions 22 and 23, which extend inward of the convex angle formed between the first flange 11 and the second flange 12. However, they are separated from each other by the concave recess 24. It is advantageous that the bottom of the concave recess 24 is located in substantially the same plane as the straight portion of the bend line 13 outside the deformation zone 21.

The lower end of the concave recess 24 is arcuate, for example arcuate or elliptical arcuate.

Further, as shown in FIG. 11, the concave recess 24 extends over the entire central portion 20 of the corrugation 17. The depth and width of the concave recess 24 decreases from the bend line 13 in one and the other direction of the first and second portions 18, 19. The concave recess 24 is connected to the vertices of the first and second portions 18, 19 and the recess is inverted at the connection between the concave recess 24 and each of the first and second portions 18, 19.

The two convex protrusions 22, 23 also extend throughout the central portion 20 of the corrugation 17. In the embodiments shown, the heights of the two convex projections 22, 23 decrease their separation distance from the bend line 13 towards one and the other of the first and second portions 18, 19. It gets higher as you do.

Such configurations of the first and second portions 18, 19 and the central portion 20 are obtained only by bending, and therefore can be developed flat. In other words, the geometry of the corner part 2 does not cause any change in the length of the material of the metal plate, or the thickness of the metal plate tends to locally degrade the mechanical properties of the corner part 2. It can be manufactured by a molding operation that does not cause a change in the metal.

13 and 14 show corner parts 2 according to two other embodiments. The corner components of FIGS. 13 and 14 are shown only in that the angles α formed between the first flange 11 and the second flange 12 of the corner component 2 are about 105 ° and 165 °, respectively. It is different from the corner component 2 described above with reference to.

Next, with reference to FIGS. 2 to 10, a bending system 1 capable of forming the above-mentioned corner component 2 and a method of using such a bending system 1 will be described. By convention, the "longitudinal" orientation of the bending system 1 corresponds to the protrusion of the first and second portions 18, 19 of the corrugations 17 to be formed in the horizontal plane, and the "lateral" orientation. Is oriented across the longitudinal direction.

First, the metal plate is bent in advance so that the first flange and the second flanges 11 and 12 are formed so as to be inclined with respect to each other. After that, as will be described later, the corrugation 17 is formed in the corner component 2 by the bending system 1.

The bending system 1 includes a lower frame 25 and an upper frame 26 movably attached to the lower frame 25 in the vertical direction. The upper frame 26 is movable between a resting position and a bending position that deforms the corner component 2 to form the corrugation 17. Therefore, the upper frame 26 can apply pressure to the corner component 2 to allow bending of the corner component 2 and formation of the corrugation 17. The upper frame 26 is shown in FIGS. 3 and 6 at its resting position. Further, in FIGS. 2, 4 and 5, in the upper frame 26, the corner component 2 to be bent is gripped between the lower die cushions 27 and 28 and the upper die cushions 42, 43, 44 and 45 described later. Indicated by the intermediate clamp position to be.

The lower frame 25 includes two lower die cushions 27, 28 arranged on each side of the central longitudinal vertical plane. The two lower die cushions 27, 28 are the first and second, respectively, inclined with respect to each other at an angle corresponding to the angle α formed between the first and second flanges 11 and 12 of the corner component 2. It has bearing surfaces 29 and 30. The first and second bearing surfaces 29 and 30 are inclined so that the inside of the corner component 2 faces downward toward the lower frame 25. In other words, the first and second bearing surfaces 29 and 30, respectively of the two lower die cushions 27 and 28, form the inner surfaces of the first flange and the second flanges 11 and 12, respectively of the corner component 2. It is something to receive. In the two lower die cushions 27 and 28, when the upper frame 26 moves from the resting position to the bending position, the punch 31 described later can be accommodated between the two lower die cushions 27 and 28. As such, they are laterally separated from each other.

The two lower die cushions 27 and 28 are attached so as to slide on the lower frame 25 in the horizontal horizontal direction between the separation position shown in FIG. 4 and the close assembly position (not shown). For this purpose, for example, as shown in FIG. 5, the lower die cushions 27, 28 each include two carriages 32, each carriage 32 on a related guide rail 33 supported by a lower frame 25. It is attached so that it slides. The two lower die cushions 27, 28 are urged towards the separation position by a return member such as a spring or gas cylinder (not shown).

The lower frame 25 includes a contact element, which allows the lower die cushion 27, 28 to limit movement with respect to the lower frame 25, and thus the lower die cushion 27 with respect to the lower frame 25. It makes it possible to determine the separation position of 28. For example, as shown in FIG. 6, each abutting element includes a flange 34 that is secured to the lower frame 25 along one of the edges of the lower frame 25, and also includes a threaded hole of this threaded hole. A screw 35 extending in the lateral direction is arranged therein. The ends of the screws 35 form a contact surface, and one of the complementary contact surfaces of the lower die cushions 27 and 28 comes into contact with the contact surface at the separated position.

For example, as shown in FIG. 2, each lower die cushion 27,28 advantageously comprises a base 36 and two wedges 37, 38, the lower die cushions 27, 28 are lower via the base 36. Mounted to slide over the frame 25, the two wedges 37, 38 form the first bearing surface 29 and the second bearing surface 30 of the lower die cushions 27, 28, respectively, and are removable to the base 36. It is attached. In the present specification, the wedges 37 and 38 are attached to the base 36 by a square iron 39. Each wedge 37, 38 is fixed to the square iron 39, for example, by a fixing screw, and the square iron 39 is fixed to the base 36, for example, by a fixing screw. The shape of the square iron 39 varies depending on the angle α formed between the first flange and the second flanges 11 and 12 of the corner component 2. The square iron 39 and wedges 37, 38 of the lower die cushions 27, 28 can be easily replaced with other square iron 39 and wedges 37, 38 that fit the bend of the corner component 2 having different angles α.

Further, the bending system 1 includes two moving assemblies 40, 41 movably attached to the upper frame 26, which can be seen, for example, in FIG.

The first moving assembly 40 is disposed facing the first bearing surface 29 of the lower die cushions 27 and 28, and the second moving assembly 41 is located on the second bearing surface 30 of the lower die cushions 27 and 28. They are placed facing each other. The first moving assembly 40 includes two upper die cushions 42, 43 arranged parallel to and opposed to one and the other of the first bearing surfaces 29 of the lower die cushions 27, 28. Therefore, when the upper die cushions 42 and 43 are in the intermediate clamp position, the first flange 11 of the corner component 2 is pressed against the first bearing surface 29 of the lower die cushions 27 and 28 to be clamped. Has been done. Similarly, the second moving assembly 41 has two upper die cushions 44 arranged parallel to and opposed to one and the other of the second bearing surfaces 30 of the lower die cushions 27, 28. , 45, and therefore, when the upper die cushions 44, 45 are in the intermediate clamp position, the second flange 12 of the corner component 2 is pressed against the second bearing surface 30 of the lower die cushions 27, 28 to clamp. It is configured to do.

More specifically, the upper die cushions 42, 43, 44, 45 each include a main structure 46 and a clamp plate 47 having a clamp surface configured to contact the corner component 2. Each clamp plate 47 is attached to each main structure 48 so as to slide in parallel in the lateral direction. Therefore, the clamp plates 47 of the first and second moving assemblies 40, 41 can move each other between the close gathering position and the separated position. To this end, as shown in FIG. 6, the clamp plate 47 includes a lateral groove 49 having a slide guide pin 50 fixed to the main structure 48. The clamp plate 47 is urged towards its separation position by a return member such as a spring (not shown).

When the clamp plates 47 of the lower die cushions 27, 28 and the upper die cushions 42, 43, 44, 45 are laterally movable and the upper die cushions 42, 43, 44, 45 are in the intermediate clamp position, The corner component 2 is deformed to form the corrugation 17 by the punch 31, and therefore the lower die cushions 27, 28 and the clamp plate 47 are affected by the traction force exerted by the corner component 2 when the corner component 2 is bent. Moves towards their close set position. Therefore, this prevents the thickness of the corner component 2 from being changed when the corner component 2 is bent.

Each of the first and second moving assemblies 40, 41 is arranged laterally between the two upper die cushions 42, 43, 44, 45 of the first or second moving assembly 40, 41. Includes a support 51 with the punch 31 shown in 5. The punches 31 of the first and second moving assemblies 40, 41 form the first portion 18 and the second portion 19 of the corrugation 17, respectively. Each punch 31 has a V-shaped cross section corresponding to a substantially triangular or substantially semi-elliptical cross section of the first portion 18 and the second portion 19 of the corrugation 17 formed. The V-shaped portion of the punch 31 of the first moving assembly 40 extends lengthwise in the direction parallel to the first bearing surface 29 of the lower die cushions 27, 28, and the second moving assembly 41. The V-shaped portion of the punch, not shown, extends lengthwise in the direction parallel to the second bearing surface 30 of the lower die cushions 27, 28.

The upper die cushions 42, 43, 44, 45 are attached to the supports 51 of the moving assemblies 40, 41, respectively, and can move in the direction orthogonal to the clamp surface of the clamp plate 47. For example, as shown in FIG. 2, the movement of the upper die cushions 42, 43, 44, 45 with respect to the support 51 is generated by the guide device, and the guide device is provided with the above-mentioned upper die cushions 42, 43, 44, 45. Includes two guide tubes 52 that are fixed to the upper die cushions 42, 43, 44, 45 and oriented orthogonally to the clamp planes of the upper die cushions 42, 43, 44, 45. The guide tube 52 slides inside the hole formed in the support 51. Further, the plurality of elastic members 53 such as a compression spring or a gas cylinder have a first end portion that abuts on the upper die cushions 42, 43, 44, 45 and a second end portion that abuts on the support 51. Has. Therefore, the elastic member 53 exerts an elastic force that moves the upper die cushions 42, 43, 44, 45 and the support 51 so as to separate them from each other in the direction orthogonal to the clamp surface of the upper die cushions 42, 43, 44, 45. Demonstrate. In the embodiment shown, the first end of each elastic member 53 is housed inside the blind holes formed in the upper die cushions 42, 43, 44, 45, and the second end is supported. It is housed inside a blind hole formed in the body 51.

Each support 51 of the first and second moving assemblies 40, 41 slides relative to the upper frame 26 in a direction parallel to the longitudinal direction of the punch 31 of the first or second moving assembly 40, 41. It is installed like this. To this end, in the embodiments shown, each support 51 of the moving assembly includes a guide rail 54, each sliding inside a carriage 55 secured to an upper frame 26. In another embodiment, each support 51 of the first and second moving assemblies 40, 41 comprises two carriages each mounted to slide on a guide rail supported by an upper frame 26. ..

In the preferred embodiment shown, the respective supports 51 of the first and second moving assemblies 40, 41 are mounted so as to slide over the intermediate element 56. In other words, in the embodiments shown, each carriage 55 of the first or second moving assembly 40, 41 is fixed to one of the intermediate elements 56. Each of the intermediate elements 56 is secured to the upper frame 26 by a removable upper wedge 57 detailed in FIG. 10, the upper wedge 57 having one end fixed to the upper frame 26 by a fixing member and the other end fixed. It is fixed to one of the intermediate elements 56 by a member. Therefore, by replacing the upper wedge 57 with another upper wedge having a different angle, the inclination of the punch 31 and the clamp surface of the upper die cushions 42, 43, 44, 45 can be set to the corner component 2 having a different angle α. Can be easily adapted to the bending of.

Further, each of the first and second moving assemblies 40, 41 cooperates with the cam follower 59 attached to the lower frame 25 as the upper frame 26 moves from its resting position to its bending position. Includes the cam surface 58 shown in FIG. 5, which is configured to do so. Here, the cam slave 59 is an idler roller having a horizontal axis extending in the lateral direction. Further, in the embodiment shown in FIG. 5, the cam surface 58 is provided at the end of the punch 31. The cam surface 58 is a surface orthogonal to the clamp surface of the upper die cushions 42, 43, 44, 45 of the first or second moving assembly 40, 41. Therefore, the first or second moving assembly 40, 41 is slidably attached to the upper frame 26, and the cam surface 58 and the cam slave 59 cooperate with each other to form the first or second moving assembly 40, Each support 51 of 41 and therefore the punch 31 is orthogonal to the clamp planes of the upper die cushions 42, 43, 44, 45 of the moving assemblies 40, 41, i.e., orthogonal to the flanges 11, 12 of the opposite corner component 2. At the same time, the upper frame 26 moves vertically from its resting position to its bending position.

Further, the bending system 1 further includes a device for deforming a bending line between the first flange 11 and the second flange 12 of the corner component 2.

The device for deforming the bending line includes, in particular, the central finger 60 and the two fingers 61, 62 shown in FIG. 4, and the two fingers 61, 62 are arranged laterally on both sides of the central finger 60, respectively. There is. The device for deforming the bending line is configured to deform the zone of the bending line 13 in order to give the above-mentioned substantially W-shaped shape with reference to FIG. 12, for example, as shown in FIG. 6, the central finger. 60 is fixed to the lower frame 25 and projects upward toward the upper frame 26. The central finger 60 is arranged at a position facing the intersection of the bending line 13 and the axes of the first and second portions 18 and 19 of the corrugation 17. For example, as shown in FIG. 4, the central finger 60 is located on the same plane as the bending line 13 of the corner component 2 when the corner component 2 is placed on the lower die cushions 27 and 28. The fingers 61 and 62 are arranged in the same lateral plane as the central finger 60, and are arranged on both sides of the central finger 60. The fingers 61 and 62 are supported by the upper frame 26.

The two fingers 61, 62 provide bending lines 13 to form the two convex protrusions 22, 23 of the W-shaped deformation zone 21 while the central finger 60 attempts to form the concave recess 24. It transforms.

As shown in FIG. 7, the two fingers 61 and 62 are attached so as to slide on the finger support 63. More specifically, the two fingers 61, 62 are attached so as to slide horizontally and laterally between the separation position shown in FIG. 7 and the close assembly position (not shown). For this purpose, as shown in FIG. 7, each finger 61, 62 is fixed to a carriage mounted on a guide rail fixed to the finger support 63. In the present specification, the return member 64, which is a coil spring, urges the two fingers 61 and 62 toward their separated positions. Further, the finger support 63 includes contact elements 65, 66 that allow the fingers 61, 62 to be restricted in lateral movement and thus the separation position of the fingers 61, 62. To this end, as shown in FIG. 7, each of the abutting elements 65, 66 includes a flange 67 that is secured to the finger support 63. The laterally extending screws 68 are mounted in holes formed in each of the flanges 67. One of the ends of each screw constitutes a contact surface, and a carriage to which one of the fingers 61 and 62 is fixed is applied to the contact surface when one of the fingers 61 and 62 is in a separated position. Contact.

Further, the finger support 63 is kinematically connected to the upper frame 26 and the upper die cushions 42, 43, 44, 45 by an articulated coupling mechanism, for example, as shown in FIGS. 2 and 6. The articulated coupling mechanism has at least one first group of four links, the four links being the first and second upper links 68, 69 and the first and second lower links 70. , 71 and so on. Notwithstanding the above, for example, as shown in FIG. 2, the articulated coupling mechanism advantageously comprises a first and second group of four links that are identical to each other, i.e., four in one group. Each of the links is parallel to each of the four links in the other group and has the same articulated articulated geometric axis. Two groups, each consisting of four links, are placed on each side of the lateral median strip, thus ensuring force symmetry.

Since two groups of four links are equivalent, only one of the two groups will be described below. Returning to FIG. 6, the first and second upper links 68, 69 are articulated to the upper frame 26 around the first geometric axis A and the second geometric axis B, respectively. You can see that. The first and second lower links 70,71 are the same moving assembly (here, the first moving assembly 40) around the third geometric axis C and the fourth geometric axis D. It is articulated to one and the other of the two upper die cushions 42 and 43, respectively. The first upper link 68 and the first lower link 70 are articulated to each other around a fifth geometric axis E, the second upper link 69 and the second lower link 71. Are articulated to each other around a sixth geometric axis F.

The six geometric axes A, B, C, D, E and F are horizontal and parallel in the longitudinal direction. Axis A and Axis B extend in the first horizontal plane, Axis C and Axis D extend in the second horizontal plane, and Axis E and Axis F extend between the first horizontal plane and the second horizontal plane. Extends in a third horizontal plane located in the vertical direction.

The finger support 63 is connected to the first upper link 68 and / or the first lower link 70 by a first slide connection. In the embodiments shown, the first slide connection is a physical spindle 72 forming a fifth axis E, which is the pivot axis of the first upper link 68 with respect to the first lower link 70, and a finger. It is formed by a slideway 73 formed on the support 63. The physical spindle 72 slides horizontally in the slideway 73. The slide way 73 extends horizontally and laterally. The finger support 63 is connected to the second lower link 69 and / or the second lower link 71 by a second slide connection. The second slide connection is formed in a physical spindle 74 forming a sixth axis F, which is the pivot axis of the second upper link 69 with respect to the second lower link 71, and in the finger support 63. Inside, the physical spindle 74 is formed by a slideway 75, which slides horizontally. The slide way 75 extends horizontally and laterally.

The six geometric axes A, B, F, D, C, E define a deformable articulated connecting hexagon in which the upper frame 26 is bent from its dormant position to its dormant position. As soon as the upper die cushions 42, 43, 44, 45 reach the intermediate clamp position where the corner parts 2 are pressed against the lower die cushions 27, 28 to clamp when moving to the six geometric axes A, The hexagon formed by B, F, D, C, and E is configured to be deformed and, more specifically, flattened. As soon as the upper die cushions 42, 43, 44, 45 are in their intermediate clamp positions, the vertical relative movement of the finger support 63, and thus the vertical movement of the fingers 61, 62, is the vertical movement of the upper frame 26. It is smaller than the movement. In other words, the articulated coupling mechanism is configured to form a reducing means capable of reducing the vertical relative movement of the fingers 61, 62 with respect to the upper frame 25.

Further, in one advantageous embodiment, the vertical movement of the finger support 63 with respect to the upper frame 26 is guided by a guide device. In the embodiments shown, the guide device includes two guide tubes 76 fixed to the finger support 63, especially as shown in FIG. The guide tube 76 extends vertically and slides inside the hole 77 formed in the upper frame 26.

The articulated coupling mechanism, i.e., the first and second groups of four links, is advantageously detachably attached. Therefore, it is possible to change the kinematics of the finger support 63 with respect to the upper frame 26 according to the geometry of the corner component 2 to be bent.

Similarly, as shown in FIGS. 7 and 9, the fingers 61, 62 and the central finger 60 are also removablely secured to the bending system. Further, it can be seen that the ends of the fingers 61 and 62 and the central finger 60 are spherical.

Hereinafter, the method of using the bending system 1 will be described in detail.

First, the metal plate is pre-bent to form the corner component 2 so as to have a first flange 11 and a second flange 12 that are inclined with respect to each other.

Then, the corner component 2 formed as described above is positioned on the first and second bearing surfaces 29, 30 of the lower die cushions 27, 28. The convex angle α of the corner component 2 is the lower frame 25 so that the inner surfaces of the first and second flanges 11 and 12 abut on the first and second bearing surfaces 29 and 30 of the lower die cushions 27 and 28. Directed to.

When the corner component 2 is correctly positioned, the upper frame 26 is moved downward from its resting position to its bending position. During the movement of the upper frame 26 to the bending position, the upper die cushions 42, 43, 44, 45 have the first flange 11 of the corner component 2 and the second flange 12 the upper die cushions 42, 43, 44, The intermediate clamp position to be clamped between the clamp plate 47 of 45 and the lower die cushions 27 and 28 is reached.

When the upper die cushions 42, 43, 44, 45 reach their intermediate clamp positions, the cam surfaces 58 of the first and second moving assemblies 40, 41 cooperate with the respective cam slaves 59 to drive the cams. The child 59 is tightly attached to the lower frame 25 so that the first and second moving assemblies 40, 41 move towards each other as the upper frame 26 continues to move towards its bending position. Moreover, each punch 31 is configured to move at a right angle to the first or second flanges 11 and 12 of the corner component 2. Therefore, the punch 31 deforms the first and second flanges 11 and 12 of the corner component 2 so as to form the first portion 18 and the second portion 19 of the corrugation 17.

When the corner component 2 is clamped between the bearing surface of the lower die cushions 27 and 28 and the clamp surface of the clamp plate, the lower die cushions 27 and 28 and the clamp plate 47 are deformed by the corner component 2 deformed by the punch 31. When a traction force is applied to the bearing, these move to the close assembly position. Next, the lower die cushions 27 and 28 and the clamp plate 47 move to their close gathering positions in synchronization with the movement of the punch 31. Thereby, it can be guaranteed that the thickness of the corner component 2 is not changed or hardly changed when the corner component 2 is bent.

Further, the punch 31 deforms the first flange and the second flanges 11 and 12 of the corner component 2, and at the same time, the bending line 13 is deformed by the device that deforms the bending line. The bending lines 13 are deformed toward the lower frame 25 on both sides of the central finger 60 by the above two fingers, and a reaction force acts toward the upper frame 26 by the central finger 60, whereby the above-mentioned abbreviation is performed. A deformation zone having a W-shaped shape can be formed in the bending line 13. When the corner component 2 is deformed, it also exerts a lateral force on the fingers 61 and 62, whereby these fingers move.

Referring to FIG. 15, a cut-out view of the methane tanker ship 170 shows a substantially prismatic sealed insulation tank 171 mounted on the ship's double hull 172. The walls of the tank 171 include a primary closed barrier configured to contact the LNG contained in the tank, a secondary closed barrier located between the primary closed barrier and the ship's double hull 172, and the primary. Includes two adiabatic barriers located between the closed barrier and the secondary closed barrier and between the secondary closed barrier and the double hull 172, respectively.

A loading and unloading pipe 173 placed on the upper deck of a ship in a known manner can be connected to the sea or port terminal by a suitable connector to transport LNG cargo from or to tank 171.

FIG. 15 shows an example of a maritime terminal equipped with a loading / unloading station 175, an underwater pipe 176, and land equipment 177. The loading / unloading station 175 is a fixed offshore facility equipped with a moving arm 174 and a tower 178 that supports the moving arm 174. The moving arm 174 supports a bundle of insulated flexible pipes 179 that can be connected to the loading and unloading pipes 173. The orientable moving arm 174 fits the entire methane tanker template. A connecting pipe (not shown) extends inside the tower 178. The loading and unloading station 175 allows loading and unloading from land equipment 177 to methane tanker 170 or from methane tanker 170 to land equipment 177. The onshore equipment includes a liquefied gas storage tank 180 and a connecting pipe 181 connected to the loading / unloading station 175 via a submersible pipe 176. The submersible pipe 176 allows the transfer of liquefied gas between the loading and unloading station 175 and the onshore equipment 177 over long distances, eg 5 km, allowing the methane tanker vessel 170 to be far away from the coast during loading and unloading operations. It will be possible to keep.

Pumps on board the ship 170 and / or pumps on land equipment 177 and / or pumps on the loading and unloading station 175 are used to generate the pressure required to transport the liquefied gas.

Alternatively, the corner components described above may be similarly used for the manufacture of tanks containing only one closed membrane. Such tanks are commonly used to transport liquid gases with boiling points and atmospheric pressure above -55 ° C.

The invention has been described in connection with, but is not limited to, all technical equivalents of the described means and combinations thereof, which are within the scope of the invention. It is clear that

The use of the verbs "include" or "prepare" and their conjugations does not exclude the existence of elements or processes other than those described in the claims.

In the claims, the reference numerals in parentheses should not be construed as a limitation of the claims.

Claims (14)

A corner component (2) for constructing a sealed membrane (3) for a tank,
The corner component (2) includes a first flange (11) and a second flange (12).
The first flange (11) and the second flange (12) are tilted from each other at an angle α of 1 ° to 179 ° and joined at the level of the bend line (13).
The corner component (2) includes a corrugation (17).
The corrugation (17) intersects the bending line (13) and extends from one end to the other end of the corner component (2), whereby the corner component (2) crosses the corrugation (17). It is configured to be deformable in the direction,
The corrugation (17)
A first portion (18) formed on the first flange (11) and extending from the first edge of the corner component (2) toward the bending line (13).
A second portion (19) formed on the second flange (12) and extending from the second edge of the corner component (2) toward the bending line (13).
Formed straddling the first flange (11) and the second flange (12), extending between the first portion (18) and the second portion (19), the said. It comprises a first portion (18) and a central portion (20) arranged side by side with the second portion (19).
The central portion (20) has an inverted W-shaped profile in a cross section on a plane passing through the bending line (13).
The profile is a corner component (2) comprising a concave recess (24) and two laterally arranged convex protrusions (22, 23) on each side of the concave recess (24). The corner component (2) according to claim 1, wherein the corner component (2) has a geometric structure that can be flatly developed in the form of a rectangular component. The corner component (2) according to claim 1 or 2, wherein the lower end portion of the concave recess (24) has an arc shape or an elliptical arc shape. The depth and thickness of the concave recess (24) is reduced from the bending line (13) to the first portion (18) in the direction of the corrugation (17) to the first portion (18). 13. Corner parts (2). Any one of claims 1 to 4, wherein the first portion (18), the second portion (19), and the convex protrusions (22, 23) project inward at the angle α. The corner part (2) described in the section. The corner component according to any one of claims 1 to 5, wherein the first portion (18) and the second portion (19) have a semi-elliptical or triangular profile having a constant height. (2). The corner component (2) according to any one of claims 1 to 7, wherein the first flange (11) and the second flange (12) have a substantially rectangular shape. A closed insulation tank for storing a fluid provided with a closed membrane (3).
The sealed membrane (3) is
A plurality of corrugated metal plates (8) welded to each other, including at least one corrugation projecting into the sealed insulation tank.
At least the corner component (2) according to any one of claims 1 to 7, which connects the metal plates of the sealed membrane (3) to each other at the joint portion between the two walls of the sealed heat insulating tank. A closed insulation tank with one. A ship (170) for transporting fluid, comprising a double hull (172) and the tank (171) of claim 8 disposed within the double hull (172). The ship (170) according to claim 9 and
Insulated pipes (173, 179, 176, 181) arranged to connect the tank (171) installed in the double vessel of the ship to a floating body or a land storage facility (177).
A fluid transport system comprising a pump for creating a flow of fluid through the adiabatic pipe from the float or land storage facility to the tank of the ship or from the tank of the ship to the float or land storage facility. .. A method for loading and unloading the ship (170) according to claim 9.
Insulated pipes (173,179,176,181) from the floating or land storage facility (177) to the tank (171) of the ship or from the tank (171) of the ship to the floating or land storage facility (177). Methods, including sending fluid through. A bending system (1) for forming the corner component (2) according to any one of claims 1 to 7.
An upper frame (26) and a lower frame (25) that can move vertically with respect to each other between the rest position and the bending position,
A first and a second configured to tilt with respect to each other at an angle α and to receive the first flange (11) and the second flange (12) of the corner component (2), respectively. Two lower die cushions (27, 28), each having a bearing surface (29, 30), which slide laterally over the lower frame (25) between the close assembly position and the separated position. Two lower die cushions (27, 28) mounted so as
Two moving assemblies (40, 40,) attached to the upper frame (26) and disposed opposite to the first and second bearing surfaces (29, 30) of the lower die cushion (27, 28), respectively. 41) and
The moving assemblies (40, 41) are, respectively.
Support (51) and
The first portion of the corrugation (17) on one or the other of the first flange (11) and the second flange (12) of the corner component (2) fixed to the support (51). (18) or a punch (31) configured to form the second portion (19).
Two upper die cushions (42, 43, 44, 45) arranged laterally on both sides of the punch (31) are provided.
Each of the upper die cushions (42, 43, 44, 45) has a main structure (46) and the first and second bearing surfaces (29, 30) of the lower die cushion (27, 28). It has a clamp plate (47) having clamp surfaces arranged parallel to each other, whereby the clamp surface is the first of the lower die cushions (27, 28) at the intermediate clamp position. The corner component (2) is configured to be pressed against and clamped to one of the first and second bearing surfaces (29, 30).
The clamp plate (47) is attached so as to slide laterally on the main structure (46) of the upper die cushion (42, 43, 44, 45).
The upper die cushions (42,43,44,45) are respectively on the support (51) of the moving assembly (40,41) and on the clamp surface of the upper die cushion (42,43,44,45). It is movably mounted in orthogonal directions so that the upper die cushion (42, 43, 44, 45) moves from the rest position to the bending position with respect to the upper frame (26). As soon as the upper die cushion (42, 43, 44, 45) reaches the intermediate clamp position, the upper die cushion (42, 43, 44, 45) is oriented in a direction orthogonal to the clamp surface. It is configured to move with respect to the upper frame (26).
The support (51) of each of the moving assemblies (40, 41) is movably attached to the upper frame (26) in a direction parallel to the longitudinal direction of the punch (31) of the moving assembly (40, 41). It is attached and
The bending system further comprises a device for deforming the bending line (13).
The device for deforming the bending line (13) is
A central finger (60) located opposite the intersection between the bend line (13) and the corrugation (17) to be formed, supported by the lower frame (25). , A central finger (60) configured to form the concave recess (24), and
Two fingers (61, 62) arranged laterally on both sides of the central finger (60) and configured to deform the bending line (13) so as to be movable to the upper frame (26). Bending system (1) provided with two fingers (61, 62) attached and arranged to form one and the other of the two convex projections (22, 23), respectively. The two fingers (61, 62) are attached to the finger support (63).
The finger support (63) is attached to the upper frame (26) and at least two of the upper die cushions (42, 43, 44, 45) of the moving assembly (40, 41). It is kinematically connected by an articulated coupling mechanism and is kinematically connected.
The articulated coupling mechanism is configured to form a reducing means.
The reducing means has a vertical relative movement between the upper frame (26) and the lower frame (25) of the finger support (63) with respect to the upper frame (26) and the lower frame (26). 25) When the upper die cushion (42, 43, 44, 45) reaches the clamp position while the relative movement is being performed from the rest position to the bending position, the said. The bending system (1) according to claim 12, wherein the relative movement of the finger support (63) in the vertical direction can be reduced. The articulated coupling mechanism comprises at least a first group of four links.
The first group consisting of the four links is
With the first upper link (68) articulated to the upper frame (26) around the first geometric axis (A),
A second upper link (69) articulated to the upper frame (26) around the second geometric axis (B).
A first lower link (70) articulated to one of the upper die cushions (42, 43, 44, 45) around a third geometric axis (C).
A second lower link (71) articulated to another one of the upper die cushions (42, 43, 44, 45) around a fourth geometric axis (D). Including,
The first upper link (68) and the first lower link (70) are articulated to each other around a fifth geometric axis (E).
The second upper link (69) and the second lower link (71) are articulated to each other around a sixth geometric axis (F).
The first, second, third, fourth, fifth and sixth geometric axes (A, B, C, D, E, F) are orthogonal to the preformed bending line (13). Is parallel to the horizontal direction
The finger support (63) is connected to the first upper link (68) and / or the first lower link (70) by a first slide connecting portion on one side, and the other side. In, the second slide connecting portion is connected to the second upper link (69) and / or the second lower link (71).
The bending system (1) according to claim 13, wherein the first slide connection portion and the second slide connection portion are arranged so as to support the finger support (63) in the vertical direction.

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