KR880002146B1 - Sealed heat insulating tank for ship - Google Patents

Abstract

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Description

Insulating leak-proof tank coupled within the ship's support structure

FIG. 1 is a perspective view of the first embodiment of the tank wall of the present invention, which is illustrated in FIGS. 1 to 6.

Figure 2 shows in detail the cross section perpendicular to the fastening part of the primary insulation wall, which is taken along a plane passing through the axis of the fastening part perpendicular to the joining zone in which the fastening part is arranged.

3 is a cross-sectional view of the welding flange housing in the channel provided in the casing of the primary insulating wall in a cross section perpendicular to the welding flange, and is a cross-sectional view taken along line III-III of FIG.

FIG. 4 is a plan view showing the casing of the primary insulating wall with a part of its upper surface peeled off, where it is assumed that the non-casing phase does not support the insert for fixing the primary sealing wall.

5 is a perspective view showing the corners of the casing of the primary insulating wall.

FIG. 6 is a plan view showing the plane of the primary thermal insulation wall carrying the insert for fixing the primary sealing wall, wherein the casing shown is perpendicular to the four joints of the primary thermal insulation wall.

7-10 are schematic cross-sectional views of four embodiments capable of retaining the metal insert within the walls of the primary insulating wall.

11 is an exploded perspective view similar to the first diagram for the second embodiment of the present invention.

FIG. 12 is a cross-sectional view taken along the axis of the fastening part, which is similar to that of FIG. 2 but according to the embodiment of FIG.

FIG. 13 shows a first variant of the tank corner, which is a cross section perpendicular to the top of the tank.

FIG. 14 is a perspective view of two intersecting parts used to connect the tank to the support structure of the ship for the variant of FIG.

FIG. 15 shows a second modified example of the structure of the tank corner according to the present invention, which is a sectional view taken along the line VV-VV of FIG.

FIG. 16 is another cross section parallel to that of FIG. 15 along the line VI-VI of FIG.

FIG. 17 is an end view showing the alignment of the primary and secondary corner plates of the apparatus shown in FIGS. 15 and 16.

FIG. 18 is a schematic elevation view taken along the line VII-VII of FIG. 17. FIG.

FIG. 19 is a plan view taken along the line VII-VII of FIG. 17. FIG.

FIG. 20 is a perspective view of a variant of securing the primary sealing wall to the primary insulating wall with screws, wherein the corner connection is made using an insert.

FIG. 21 is a perspective view showing some first modifications to the structure of FIG. 20, wherein the corner connection is made on a connection sheet screwed to the primary insulating wall.

FIG. 22 is a perspective view showing a second variant of the structure of FIG. 20, wherein the corner connection is made by a carver plate.

23 is a cross-sectional view showing a modification of the primary sealing wall.

The present invention relates to a structure of a leak-proof insulating tank designed for the marine transportation of liquefied gas, in particular liquefied natural gas with a high methane content.

French Patent Nos.1438330, 2105710 and 2146612 have already disclosed the structure of adiabatic leak-tight tanks that are coupled to the ship's support structure, which has two successive sealing walls, the primary wall in contact with the liquefied gas to be transported. And a secondary wall disposed between the primary wall and the supporting structure of the ship, and two heat insulating layers called heat insulating walls are alternately disposed between these two sealing walls. In these constructions, the primary and secondary insulation walls consist of parallel hexahedral casings filled with insulation, and the primary and secondary sealing walls are made of invar welded edges on both sides of the weld flange. It consists of a rake.

In French Patent No. 2413260, a tank structure is disclosed in which a panel of foamed plastic composed of plywood is replaced by a side facing the inside of the tank instead of a wooden casing filled with foam. In French Patent Application No. 79-19436, the structure of the tank, although in all cases the primary and secondary sealing walls defined in the above-mentioned specification, is constituted by the assembly of an invar strike welded with raised edges, It has been announced to improve to consist of secondary insulating walls made of foam.

Applicants' research has shown that, in contrast to all the above-mentioned prior patents, the tank structure is made by forming a primary wall according to a technique other than assembling by welding the raised edges of a metal insulator with thin in situ sheet metal. It was confirmed that it can be designed. In particular, it has been found that satisfactory results can be obtained by assembling a relatively thick in-bar sheet with overlap welding, or by using a primary sealing wall made of corrugated cryogenic steel, which is also overlap welded. Low-temperature steel sheets such as stainless steel, for example, have the advantage of being cheaper than in-bar sheets, but they must be corrugated because of their high coefficient of expansion. By making the waveform, the degree of deformation can be as mentioned in French Patent No. 2413260.

In the first embodiment of the present invention, a primary heat insulating wall made of foam and a second heat insulating wall made of a wooden casing filled with heat insulating particle material are used, and the second embodiment has the reverse structure.

Therefore, the present invention relates to a new industrial product composed of a thermal insulation leak prevention tank coupled to a ship's support structure, wherein the tank is composed of two successive sealing walls, the primary wall of which is connected to the interior of the tank and the secondary wall. Is arranged between the ship's supporting structure and the primary wall, these two sealing walls are alternately arranged with the two insulating walls, and the secondary insulating wall is cooperative with the fasteners arranged on its edges. It is composed by assembling the parallelepiped heat insulating parts fixed to the ship support structure by the fastening parts coupled to the ships, the heat insulating parts are separated from each other at regular intervals by the straight joint area in which the above fastening parts are arranged, The primary insulation wall is also composed by the assembly of the insulation parts supported on the secondary insulation wall, and the secondary sealing wall is done inside the tank to raise the edges of the gold. The strike consists of a thin sheet with a small diffusion coefficient, and the rising edges of the strike on both sides of the weld flange which are mechanically supported on the components of the secondary insulating wall. In a butt welded tank, the primary sealing wall is constituted by the assembly of sheets with overlap welded edges, where a portion of the edge of one sheet is in direct contact with the interior of the tank, while the other is secondary. It is characterized in that it is in contact with and fixed on the insulating wall, and the connection of the corners of several adjacent sheets is made by welding.

According to the first type of construction, the fixing of one part of the sheet edge was made by local volume to the metal insert installed on the corresponding side of the part of the primary insulating wall.

According to the second type of structure, each part of the primary insulating wall has a sheet of non-expandable material on the side facing the inside of the tank, and the fixing of the sheet edge to the primary insulating wall is evenly distributed on the edge part. The screw is configured to be screwed into the sheet.

In these two types of structures, there can be two ways of connecting four adjacent sheet corners. According to the first approach, welding for the connection between several adjacent sheets is carried out on the metal connections supported by the parts of the primary insulating wall. In this case, the metal connection is a metal insert, or each part of the primary insulation wall consists of a sheet of non-expandable material on the side facing the tank and the metal connection is screwed there as a metal plate.

According to the second method, welding is made for the connection between several adjacent sheets by covering the connection area of the sheet with a cover disposed to face the inside of the tank and welding the entire magnetic field to the sheet.

In a first embodiment, the sheet of the primary sealing wall is an inba sheet, preferably 0.5-2 mm thick. In the second embodiment, the sheet of the primary sealing wall is a corrugated plate made of low temperature steel, having a thickness of 1-2 mm and a corrugation depth of 30-120 mm.

The primary insulating wall can be supported on the secondary sealing wall by a fixing part fixed to the ship's supporting structure, where the fixing part penetrates the secondary sealing wall, but the leakage prevention of the secondary sealing wall is a fixing part. Is maintained by welding connecting it to the strike of the secondary sealing wall.

In a first variant, the part of the secondary insulating wall is a panel of foam and the part of the primary insulating wall is filled with insulating particulate material as internally partitioned casings.

In a second variant, the parts of the secondary insulating wall are casings filled with insulating particulate material and the parts of the primary insulating wall are panels of foam covered with a solid non-expandable plate facing the inside of the tank. Plywood panels are preferred as the above-mentioned non-expansion sheet of cold material.

According to this embodiment, the components of the secondary insulating wall are rectangular parallelepipeds and the supporting articles used to fix the secondary insulating wall on the supporting structure are arranged in two orthogonal directions, for fastening coupled to the primary insulating wall. The parts are evenly arranged in line with them. The supporting parts are threaded gudgeon pins whose bases are welded to the ship's supporting structure, and the fasteners associated with them are small plates, which are fitted to the secondary insulating wall by It is supported in the component area, and the fixing part consists of a tube clamped over the support pin. At the end of each tube away from the support structure there is a support flange which reaches to the level of the secondary sealing wall on the one hand and a tip on the other hand, the tip of which is firstly the base and thus of the secondary sealing wall. By supporting the brake between itself and the support flange and welding its edges to the secondary sealing wall, the leak-proof can be ensured. Secondly, there is a threaded part, so that the fastener cooperates with it. The fasteners secure the parts of the primary insulating wall against the supporting structure and push them against the secondary sealing wall.

In the first variant described above, the wide surface of the foam panel is covered with a solid sheet of non-expandable material, and the fasteners combined with the support for the secondary insulating wall are connected to two adjacent panels arranged near the support structure. It is simultaneously attached to the two parallel protruding edges of the joined plates, and the plates placed near the secondary sealing wall have parallel grooves that engage a flange installed in the groove for butt welding the metal strike of the secondary sealing wall. have. The grooves in which the welding flange is engaged are parallel to one of the supporting component lines. The casing of the primary insulating wall has internal sections and two edges parallel to the welding flange protruding from the secondary sealing wall, the flanges being in a channel installed in the parallel partition. The edges of the primary insulation wall parts are parallel to the welding flange and have a removable tennon, which engages the fasteners which are combined with the tips of the fastening parts.

In the second variant described above, for each of the secondary insulation wall casings parallel flaws are provided on the widest side furthest from the support structure such that a flange for butt welding the metal strike of the secondary insulation wall is engaged therein. On each edge perpendicular to the grooves there is a tenon which is separable in the vicinity of the supporting structure, on which the tendons which are coupled with the supporting article are supported, and the tenonless casing edges are similar edges of the adjacent casing. In contact with On the sides in contact with the secondary sealing wall in the foamed panels of the primary insulating wall there are channels to which the welding flange of the secondary sealing wall will engage, the edges of each panel being attached to adjacent panels so that at least one fixing It is held on the secondary sealing wall by the component, and the fastener of the fixing component is supported on the base of the well installed in the panel and closed on the stopper. Each casing of the secondary insulation wall is held on the supporting structure by four supporting parts arranged at each corner thereof, of which two fixing parts are arranged in the same identity perpendicular to the tenon of the casing. The tube constituting the parts is supported.

In the two variants described above, the cross section of the grooves into which the weld flange is engaged is T-shaped and the cross section of the weld flange is L-shaped. According to the known method, the parts of the secondary insulating wall can be attached to the support structure by parallel slats made of polymerizable resin, which slats can be attached to the support structure irrespective of irregular deviations with respect to the theoretical surface of the support structure. Form the geometric surface to be defined. In order to reduce the heat loss, the supporting and fastening parts allow the sealing area between the insulating wall parts to be filled with insulating material, which is suitable after the clamp is tightened and on the edge of the corresponding insulating wall. The slat supported in the joggle is used to close the rear of the sheet constituting the sealing wall.

It has been mentioned earlier that the sheets constituting the primary insulating wall can be fixed on the metal insert. These metal inserts can be held in correspondingly shaped holes installed in the plates of the primary insulating wall supporting the primary sealing wall.

While cooling the tank of the present invention, shrinkage occurs due to a temperature drop, which is manifested as a traction force applied to the fasteners connecting the tank to the support structure of the ship. This force is particularly difficult to overcome at the corner of the tank, ie where the two panels are attached at right angles. This difficulty becomes serious as the coefficient of linear expansion of the primary sealing wall and the sheet thickness of the primary sealing wall increase.

According to a first variant designed to solve this problem, the corner of the tank consists of a number of identical cross-pieces, the cross-sections arranged side by side, each with two half flanges for the clamps. flange and two half flanges for tank support, the half flanges for clamps constitute the flanges of the crossovers on the extension of the supporting half flanges, and the two flanges of all crossovers of the same corner are the tank in question Connected along the same edge parallel to the edge of the corner, the cross fastener half flanges are fixed to the ship's support structure, and the cross support half flanges are firmly attached to the metal strakes of the secondary sealing wall. At the corners of the supporting half flanges facing towards the tank, the intersections of the same tank corners support the secondary edges over each cross-punch supporting half flanges, the secondary edges being held on several adjacent intersections and they are fixed angles In a convenient corner zone the side facing the tank is covered with the same metal sheet as used for the secondary seal wall strike, the sheets being approximately coplanar and welded to the secondary seal wall strike. The connecting angle pin is welded to the sheet covering two adjacent secondary edges of the tank corner. The primary edge is arranged in the corner formed by the secondary edge and is fixed to the cross piece by fasteners which leak-proofly penetrate the secondary sealing wall or its extension, the primary edge being the primary seal. The wall supports the metal angle pin that is welded.

According to a second variant designed to solve the problem of being eliminated by the structure of the tank corner, the tank corner is arranged so that a number of identical secondary corner plates are connected side by side along an edge parallel to the edge of the tank corner in question. And these secondary corner plates are each supported by four tubular parts located perpendicular to the edges in the same plane, one pair of tubular parts extending towards the tank, the same edge parallel to the edges of the secondary corner plates. Supports a plurality of identical primary corner plates arranged side by side connected in parallel, the primary and secondary corner plates support edges coated with the same type of thin metal film used for drying the corresponding sealing walls, The thin film is welded to the wall. The primary and secondary corner plates each receive two right angle edges, and the thin metal coating of the edges is covered by the angle plate connections welded within the corners they form. The tubular components supporting the primary corner plates penetrate the secondary sealing wall or its extension in a leakproof manner, and in each primary corner plate, two right angle reinforcements are provided on both sides of the tubular component supporting it. Secondary corner plates have a right angle reinforcement perpendicular to each pair of tubular parts that do not extend toward the primary corner plate. The lengths of the primary and secondary corner plates are the same when measured parallel to their tops, and the isolation planes of two adjacent primary corner plates are perpendicular to the secondary corner plate stiffener.

In the following description with reference to the accompanying drawings, some embodiments of the invention are described in more detail according to non-limiting embodiments.

1 through 6 of the drawings show a first modification of the leak-proof insulation tank of the present invention. The tank is designed to be built on ships carrying liquefied natural gas. Reference numeral 1 denotes a support structure of the ship, which is a double compartment or double hull supporting the wall of the tank. There may be local deformation of the walls of the support structure due to manufacturing errors, which is a problem for drying the tank of the present invention. In a known manner, a plywood slat 2 made of polymerizable resin is arranged on the wall 1, the position of the slat 2 being in a discontinuous manner, theoretically independent of the conformity of the shape of the wall 1. It is formulated to form a flat surface.

In total, the parts of the secondary insulating wall indicated by (3) lie on the slats (2). Each part 3 consists of a rectangular parallelepiped made of foam, for example a closed cell polyurethane foam. The foam block 3a has its two wide rectangular surfaces covered with plywood panels 3b and 3c, the panel 3b being supported on the slats 2 and the panel 3c with a welding flange. The secondary sealing wall composed of the assembled bar strike 4 is supported by welding the raised edges on both sides of (5). The panel 3b projects over the entire block periphery with respect to the foam block 3a. The panel 3c has a groove 6 having a T-shaped cross section, which is designed to receive a welding flange 5 having an L cross section as shown in an enlarged view in FIG. The groove 6 is arranged perpendicular to the slat 2 and the parts of the secondary insulating wall 3 are surrounded by the support part 7 over the entire periphery of the panel 3b.

The supporting component 7 is a screwed girder pin whose base is welded perpendicular to the wall 1. The force pins 7 are distributed along rows parallel to the two orthogonal directions, one of which is perpendicular to the slats 2.

In the embodiment described, the row of pins 7 in rows perpendicular to the slats 2 are spaced at 1 m apart and the line of pins 7 in rows perpendicular to these pins are spaced at 3 m apart. Accordingly, the jig of the parts of the secondary insulating wall 3 is determined. The width of the strike 4 is 50 cm and the two grooves 6 provided in each panel 3c are symmetrical with respect to the main axis of the panel 3c.

The support member 7 is engaged with a fastener 8 consisting of a square plate which is supported on the projecting edge of the panel 3b. The plate 8 is held by a bolt 9 fitted on the threaded girder pin 7. In this way the part 3 is held on the ship's support structure and the thickness of the resin part on which the slats 2 are laid is compensated by the threaded insertion allowance of the threaded force pin 7. The spacing of the pins 7 is selected such that one corner of each part 3 can be placed. On each of the coffin pins (7) of the corners, on each coffin pin (7) 1 m away from each corner on each longitudinal edge of several components (3), tubular components, denoted as (10), are thermally connected, which are associated with the cohesive joints. Along with the pin 7 is formed a fixing component designed for fixing the primary insulating wall.

The tubular part 10 has its base portion screwed into the health pin 7 and a support flange 11 is installed at the other end thereof, and the support flange has a jog joint formed on the corresponding edge of the panel 3. 12). The tubular part 10 is thus screwed into place and, when fully tightened, the position of the flange 11 is fastened to the part 3 by means of a rotary stop member. In this case, the thickness change compensation of the resin parts on which the slats 2 are placed is possible while the secondary heat insulation wall is completely maintained according to the screw insertion allowance of the tubular component 10 onto the threaded force pins 7. The upper surface of the support flange 11 has reached the level of the invar straight 4 precisely and supports it. In all joint zones located at right angles to the ground 7, an insulating strip designed to fill the space 13 between the two adjacent parts 3 is arranged, and the joint zone is provided with slats at the level of the support flange 11. 14), the slat 14 is supported in the jog joint 12 and closes the junction zone to form a continuous support for the secondary sealing wall consisting of the strike 4.

Within the strike 4 is a circular orifice 15 at right angles to the support flange 11. These orifices 15 are arranged perpendicularly to the threaded housing provided in the central region of the flange 11, in which the threaded base of the tip indicated by 16 is fitted. The base 17 of the tip 16 can be supported around the entire circular orifice 15 on the strike 4 by inserting the tip into the threaded housing of the support flange 14. Therefore, it is sufficient to weld the periphery of the base 17 to ensure leakage prevention around the fixing parts 7, 10, 16. The upper portion of the tip 16 is a threaded region where the nut 18 cooperates with it.

A secondary sealing wall, formed of invar straights 4 welded on both sides of the invar welding flange 5, constitutes a leakproof wall, on which the primary insulating wall for the tank of the present invention is located. . The primary heat insulation wall consists of a plywood casing, indicated by 19. Each casing 19 has an inner compartment parallel to its edge and its general shape is a rectangular parallelepiped, 1 m long and 0.95 m wide. On the two edges spaced at 0.95m intervals, a tenon 20 is inserted and a jog joint 21 at the end of the tenon. The parts 19 are arranged so that the tips 16 are located at their corners. Therefore, the fixation of the component 19 can be ensured by the plate 22 supported in the joggle 21 of the tenon 20 and held by the bolt 18 coupled with the tip 16. A fastener consisting of a plate 22 is supported on four adjacent joggle joints 21 and the plate 22 is square in shape. When the parts 19 are mounted side by side, an insulating strip 23 is inserted below the tenon 20. The junction zone constructed on the tenon 20 is finally filled with insulating material and closed by a detachable slad 24.

In the part 19 of the primary sealing wall there is an inner compartment formed of three replacement pieces 25 parallel to the tenon 20 and a number of crossing pieces 26 orthogonal to the crossing pieces 25 thereof. One of the intersections 25 is arranged in the plane of symmetry of the component 19. The remaining two cross sections 25 are thicker than the cross sections 26 and are symmetric about the center of the part 19. The remaining two cross pieces 25 are orthogonal to the two welding flanges 5 of the secondary sealing wall, and on the lower surface there are channels 27 constituting the housing of the protruding welding flange 5. . In order to allow the flange 5 to penetrate into the channel 27, the corresponding surface of the component 19 was formed of three panels 19a separated from each other at right angles to the two channels 27. In this way, the panel 19a can be placed on the metal strike 4 even if there is a protrusion consisting of the welding flange 5.

The parts 19 abut each other along an edge perpendicular to the tenon 20, while the two adjacent parts 19 are separated from each other by a slat 24 of width 5 cm along the other edge. In this way, the module occupied by the component 19 turns into a square of 1m in width and length. Each part 19 is filled with an insulating particle material such as pearlite. On the opposite side of the side to which the panel 19a is attached is a plywood panel 19b, on which a metal insert 28 is placed which allows the primary sealing wall to be fixed.

7-10 show four structural modifications of the metal insert 28 on the component 19 of the primary thermal insulation wall constructed in accordance with the above description. FIG. 7 shows an insert 28a consisting of a circular recessed disc whose edge is fixed into a joggle joint installed on the lower surface of the panel 19b, the disc 28a also intersecting the part 19. It is supported by pieces 25 and 26. FIG. 8 shows an insert 28b consisting of a circular plate with a rim on one surface thereof, which is attached to a tongue 29 which is fixed to the panel 19b in the part 19. Stuck by 9, the insert 28c is constructed by fastening two half inserts by rivets, one of which has its base 30 secured to the panel 19b in the part 19 and the rest of the inserts. It consists of a cap covering the first half insert. In FIG. 10 the insert 28d consists of a plate with a latch stud 31 at its inner part, which stud is embedded in a clip 32 fixed in a joggle joint on the inner surface of the panel 19b. Embodiments of the metal insert 28 may be used in the same manner for the primary thermal insulation wall according to the second variant, which will be described below with reference to FIGS. 11 and 12. The only difference is that in the first variant each insert is supported by an inner compartment inside the casing, while in the second variant it is continuously supported by the foam of the part.

The primary sealing wall is constituted by the assembly of the overlapping rectangular sheet 33. Two edges of one sheet 33 are disposed above the adjacent sheet and the other two edges are disposed below the adjacent site. Overlapping adjacent sheets Two edges disposed thereon are welded to the sheet over its entire length. Two edges located below the adjacent sheet are welded onto an insert 28 mounted on the panel 19b of the component 19. In order to perform this welding, an orifice 34 smaller than the diameter of the insert 28 is provided on the corresponding edge of the sheet 33. These orifices are each positioned at right angles to the insert 28. The sheet 33 has a width of 2 m and a length of 3 m. Each orifice is arranged such that its central longitudinal axis coincides with the central longitudinal axis of the component 19. In this way the overlap of the two adjacent sheets 33 is made perpendicular to the central axis of the part 19 and the insert installed for welding is located only above this central axis. In the embodiment described, the orifices 34 are distributed every 33 cm and the connecting section 35 for the four sheets 33 is arranged perpendicular to the center point of the part 19. At this center point is placed an insert 28 having a larger diameter than the insert disposed perpendicular to the orifice 34. Thus, it can be seen that there are three kinds of parts 19.

Some parts are arranged on the panel 19b at the intersection of the five inserts as shown in FIG. 6, with the central insert having a larger diameter than the other two, while the other part has three inserts 28 on one or the other of the two axes of symmetry. have. Another part does not have an insert. Welding configured on the edge of the orifice 34 ensures the connection between the corresponding edge of the sheet 33 and the primary insulating wall. By overlapping the sheet 33 by welding along the entire edge of the adjacent sheet 33, leakage prevention of the primary sealing wall is ensured, in which the zone 35 is placed on a large diameter insert 28 arranged at right angles thereto. Leak-proof welding is applied and the corners of the sheet 33 are oblique so that each sheet has a weld zone to ensure connection with the insert 28. In a first embodiment, the sheet 33 is about 1 mm thick invar steel. In another embodiment, the sheet 33 is a low temperature steel sheet, for example a stainless steel 1.5 mm thick containing 18% nickel and 8% chromium, as shown in cross section in FIG. It is corrugated in the orthogonal direction, and this waveform can withstand deformation due to cooling shrinkage.

11 and 12 illustrate another modification of the present invention. In this modification, the secondary insulating wall is composed of a plywood casing filled with insulating particulate material such as pearlite. These casings are denoted by 119 as a whole. Each casing is 1m long and 50cm wide. They are laid on the slats 2 fixed to one wall of the support structure 1 by polymerizable resin parts. In the description of this embodiment, all of the components, such as those of the first modification, are denoted by the same numbers as in the case of the components (1) and (2) described above. The lower panel 119a of the casing 119 rests on the slat 2 and the upper panel 119b supports the inbar strike 4 of the secondary sealing wall. The strike 4 is assembled by welding the raised edges on both sides of the welding flange 5 as in the first variant. The welding flange 5 is disposed in the groove 6 provided in the panel 119b along the central longitudinal axis of the casing 119.

On the narrow side of the panel 119a of the casing 119, a long part 120 is installed so that the casing 119 can be fixed to the support structure 1 of the ship. The support structure (1) supports the support part in a straight direction parallel to the slat (2), the support part being composed of a threaded gripping pin (7) coupled with a fastener and the gripping pin is a tenon (120). It is supported on and fixed in place by the nut 9. The force pin 7 is provided in each corner of the casing 119. Each row of the pins (7) every 1 m. That is, the tubular component 10 is designed to form a component for fixing the primary insulation wall to every second pin. At the end opposite to the pin 6, the tubular part 10 supports the support flange 11 fixed in the joggle joint 12 of the panel 119b of the casing 119. Since there are screw grooves on the pins 7, it will be appreciated that considering the length of the screw portions, the thickness change of the resin parts on which the slats 2 are placed can be compensated. The support flange 11 ensures the fixation of the mouth 16 through the orifice 15 through the orifice 15 as in the case of the first variant. The base 17 of the tip 16 is welded to the strike 4 around the hole 15 to ensure leakage protection. The slats 114 supported in the joggle joint 12 ensure the closure of the junction zone perpendicular to the support component between two successive fixing components. These slats restore the continuity of the supporting wall of the secondary sealing wall. The bond zone is filled with insulation before the slats 114 are placed.

In this variant, the primary insulating wall consists of foam panels, indicated by 103. These foam panels are 1 × 3 m rectangular parallelepipeds supported on a secondary sealing wall consisting of a strike 4, the surface opposite the strike 4 being covered with a plywood panel 103c. The longitudinal edges of the panel 103c are arranged 15 cm apart in parallel to the weld flange 5. The blowing agent 103a of the panel 103 has a channel 127 on the surface supported on the strike 4, in which the welding flange 105 and the raised edge 104 of the strike are contained. The panel 103 is arranged so that the joining edges abut and the edges are fixed by the low temperature adhesive during placement.

One of the corners of each panel 103 is perpendicular to the tip 16. In order to embed the tip 16, each panel 103 is provided with a cavity through which the tip 16 can pass freely. The cavity is through a wider joggle joint and within it is a small plywood panel 150, which is threaded into the tip 16 and cooperates with the threaded end of the tip 16. 18) it is supported on the bottom of the joggle joint and a washer 22 is fitted between the nut and the small panel 150. Therefore, the small panel ensures that the panel 103 of the primary insulation wall is clamped and fixed by the fixing parts composed of the parts 7, 10, and 16. After this fixation, a thermal insulation resin is injected into the cavity 123 and the jog joints containing the small panels 150 are sealed off by a stopper 15 consisting of foam zone and plywood washer.

The primary insulating wall dried as described above serves as a supporting surface for the primary sealing wall, which is completely applied with respect to the supporting structure (1). The primary sealing wall is constructed by assembling the same sheet 33 as described in the first variant. This assembly is the same metal insert 28 as those of the first variant, located perpendicular to the zone 35 to which the four adjacent sheets 33 are connected and perpendicular to the orifice 34 installed at the edge of the sheet 33. ), By overlap welding, as described for the first variant.

Referring to the first variant of the connection of the support structure of the tank corner is as follows. This variant is illustrated in FIGS. 13 and 14 and the described embodiment relates to the case where the primary sealing wall, denoted by reference numeral 223 in the figure, is composed of a corrugated low temperature steel sheet.

The two right angle panels of the support structure are marked with (1) as in FIGS. 1 to 12. The tank corner was dried using a number of identical cross sections, denoted 200. Each cross piece 200 is composed of two fixing half flanges 201 and two tank supporting half flanges 202, and one fixing half flange 201 extends over the supporting half flange 202. In the cross section constitutes a flange. The two flanges of all cross sections of the same tank corner are connected along the same top parallel to the top of the tank corner.

On the side facing the tank, each supporting half flange 202 supports the wooden edge 203 covered with the in-bar sheet 204. The edge 203 is pushed toward the top of the cross piece 200 by the thrust screw 205. The cover sheet 204 extends to the level of the surface panel 206 of the component 207 constituting the secondary insulating wall. The connection between the edge 203 and the component 207 is made by plywood slats 208 with edges disposed within the jog joints of the edge 203 and the component 207. The edge 203 is fastened to the supporting half flange 202 by bolts 202. A secondary sealing wall consisting of an inbar strike 4 partially covers the slats 208 and each strike 4 is connected to the invar packing 210 perpendicular to the slats 208. The cross section of the invar packing is the same as that of the strike 4, but the thickness of the strike 4 is 0.7 mm compared to 1.5 mm. The connection of the packing 210 and the strike 4 is made by overlap welding, the packing 210 covers the bolt head 209 and the end 210a of the packing is the carbite 204 of the edge 203. The welding vertex of the phase is constructed. Thus all forces exerted on the secondary sealing wall are returned to the edge 203 and from there back to the crosspiece 200. The corner connecting plate 211 is welded to the corner formed by the two metal coatings 204 of the two edges 203. An insulating foam 212 is provided between the support structure 1 and the cross piece 200, for example by injection. Intersections are connected to each other by the edge 203 of about 3m length, but are separated from each other, so that they can move relative to each other.

In order to ensure the connection of the primary sealing walls of the two right angled panels of the tank corners, each inside formed by the edge 203 has an edge 213 and plywood edge 214 made of a material known for example by the trademark "klegecel". ) Is arranged, the plywood edge 214 forms two layers consisting of two right edges. Edges 213 and 214 are held on the support flange 202 of the cross piece 200 using bolts 215, which are threaded into the tip 216 It penetrates the packing 210 and the sheet 204 and is threaded into the supporting half flange 202 of the cross piece 200. The penetration of the tip 216 into the secondary sealing wall is made leakproof by the annular base 217 of the tip, which base 217 rests on the packing sheet 210 while being secured so that its entire periphery It is welded to the sheet. On the tree 214, the metal corner plate 219 is connected by a wood screw 218. The thickness of the layers of the edges 213 and 214 and the corner plate 219 is the same as the part thickness of the primary insulation wall, so that the plywood panel 220a of the primary insulation wall supporting the primary sealing wall is the corner plate. It is enough to be located at the level of 219. The panel 220a is connected to the corner plate 219 by a connecting slat 221. The primary sealing wall 233 is occupied by the corner plate 219. This welding is made by placing a hole perpendicular to the corner plate 219 at the base of the corrugated portion of the primary sealing wall 233 and welding the entire periphery of the hole simultaneously with a mechanical connection to ensure leakage prevention. This structure thus ensures the continuity of the leak-proof continuity of the primary secondary sealing wall in the tank corner as well as the force due to shrinkage of the support structure during cooling to be returned by the cross piece 200. Since the cross pieces 200 are arranged side by side with a gap therebetween, these cross pieces are able to move relative to the hull deformation of the ship due to the action of the surge at sea.

Figures 15-19 show another variant of the corner of the tank of the invention. In this modification, many secondary angle plates 301 are used side by side so as to have a common top. These secondary angle plates 301 are connected to two right angle panels of the ship support structure 1 by two pairs of tubular parts 302a, 303b and 303a, 302b installed at right angles to their flanges. . The pair of tubular parts 302a and 302b do not penetrate the angle plate 301, one side is welded to the support structure 1, and the other is welded to the flange of the secondary angle plate 301. The length adjustment of each part is made by sliding sleeves welded during assembly. However, the tubular component pairs 303a and 303b penetrate through the secondary angle plate 301, and have a threaded housing on the side facing the inside of the tank so that the threaded tip 304 is disposed therein. On each flange of the secondary angle plate 301 there is a wooden edge 305 that connects several successive secondary angle plates at once and is supported by a rim 306 welded to the flange end of the angle plate 301. The edge 305 is pushed toward the top of the angle plate 301 by screws (not shown). When the tree edge 305 is properly pushed toward the top of the angle plate 301, resin is injected into the space 307 separating the rim 306 and the edge 305. The edge 305 is covered with a thin film of in-bar 308, to which a packing 310 extending to the strike 4 of the secondary sealing wall as in the case of FIGS. 13 and 14 is connected. The packing 310 is welded to a thin film of invia 308 along its distal top 310a. A connecting corner plate 309 made of invar ensures the connection between the two thin films 308 covering the edge 305 by welding. The tip 304 penetrates the membrane 308 but has a flange 311 so that its entire periphery is welded to ensure leakage prevention. Thus, the secondary sealing wall is connected at the corner of the tank in question.

Both tips 304 have a threaded housing therein and a screwed housing therein so that the primary corner plate is assembled on the secondary corner plate 301 by bolts 313 cooperating therewith. 312 can be fixed, and an insulating part 350 is inserted between the corner plate 312 and the thin film 308. In the primary corner plate 312, a wooden edge 314 which serves the same role as the edge 305 of the secondary angle plate 301 is disposed. Edge 314 is covered with an in-bar 315 of the metal film and is pushed in place from rim 316 and the space between rim 316 and edge 314 is filled with injected resin 317. The in-bar corner connecting plate 318 ensures leakage prevention in the angle formed by the two thin films 315. In this embodiment, the primary sealing wall is made of thick inbasheet 33, the distal edge of which is superimposed over the invaate 315 and welded over the entire length of its top. The leaktight connection of the two primary sealing walls 333 at the tank corner is thus provided.

Given the shrinkage forces acting on the primary and secondary angle plates, it will be seen that it is advantageous to place reinforcements on these angle plates.

The reinforcement which forms the flange 319 perpendicular to the top of an angle plate in the primary angle plate 312 is arrange | positioned along the both sides of the bolt 313, respectively. Similarly, the reinforcing material 320 is disposed in the secondary angle plate in the plane of the axes of the tubular parts 302a and 302b. The space 319 between the primary and secondary angle plates is located perpendicular to the reinforcement 320 of the secondary angle plate 301.

It will be appreciated that the tank structure of the present invention thus enables a leakproof corner connection, whether the primary sealing wall is a corrugated low temperature steel sheet or a flat in-bar sheet.

FIG. 20 is a perspective view of a variant in which the primary sealing wall can be secured to the primary insulating wall, whether it comprises a structure of types 1 to 6 or following the structures of FIGS. 11 to 12. This figure only shows the primary walls. The components of the primary insulation wall are indicated by 404, which are the same as the components 19 or 103 described above. Thus on the side facing the tank in the part 404 there is a plywood panel 404a and the sheet 33 of the primary sealing wall is attached to a plurality of screws 400 uniformly distributed along two adjacent edges of each sheet 33. It is fixed to the plate 404a by this. The screw 400 is a wood screw with a shaved head and a hole having a corresponding shape is drilled at the edge of the sheet 33 to receive them. Screw 400 is fitted to plywood panel 404a. Each sheet 33 has two adjacent edges threaded as indicated above, and the other two edges are superimposed over the threaded edges of the two adjacent sheets and welded to these two sheets over their entire length. The prevention of leakage of this assembly is thus ensured by foaming of the sheet and its welding. Fixation to the component 404 of the primary insulating wall is ensured by the screw 400. Adhesion to the component 404 of the primary insulating wall is ensured by the screw 400. However, there is a problem in preventing leakage in the connection area of four adjacent sheets. In these connection corners, in the case of the variant of FIG. 20, the same metal insert 401 as the metal insert 28 described above is disposed on the panel 404a of the part 404, and the sheet corner is cut at an angle to be welded to the insert 401. To ensure leakage prevention.

Figure 21 is one possible variant of the structure of Figure 20. In some of these variations, attempts were made to avoid installing metal inserts in the primary insulation wall component. To do this, the metal insert of FIG. 20 structure was replaced with a metal sheet 402, which was placed on the plywood panel of the secondary insulation wall part and was for example cut by four screws, which were cut off like a screw 400. It is held on that panel. The leak prevention at the corner connecting area of the four adjacent sheets 33 is then achieved by welding the obliquely cut corners of the four sheets 33 to the metal sheet 402.

FIG. 22 shows yet another variant of the FIG. 20 structure. According to some of these modifications, the carver plate 403 may also be disposed facing the inside of the tank to prevent leakage in the corner connecting area of the four sheets 33, the plate 403 having four corners of four adjacent sheets. Covering the assembly, the entire periphery of the carver plate is welded to ensure leakage prevention of corner connections.

Therefore, as described above, according to the present invention, by reducing the primary sealing wall to a low temperature steel such as stainless steel, the cost can be reduced. In particular, the coefficient of expansion is reduced by forming a low temperature steel sheet such as the stainless steel in a wave form. .

In addition, the formation of the primary sealing wall made of stainless steel as described above also provides the advantage that the corrosive article can be accommodated in the tank.

It is to be understood that the embodiments described above are in no way limited thereto but are capable of several other preferred modifications within the scope of the invention.

Claims (33)

The tank consists of two successive sealing walls, the primary wall of which is in contact with the internals of the tank, the secondary wall being disposed between the vessel's support structure and the primary wall, and these two sealing walls are two insulation Arranged alternately with the wall, the secondary insulating wall being constituted by an assembly of parallelepiped insulating parts fixed to the ship support structure by firmly supporting the parts to the support structure cooperating with the fasteners disposed on their edges. The heat insulating parts are separated from each other by a linear joining zone in which the fixing parts are disposed, and the primary heat insulating wall is also constituted by the assembly of the heat insulating parts supported on the second heat insulating wall. Is composed of a metal strike with an edge rising toward the inside of the tank, and is composed of a thin metal plate with the low expansion coefficient of the strike, In a tank in which the raised edge of the strike is butt welded on both shafts of the welding flange mechanically supported on the part of the secondary insulating wall, the primary sealing wall is a corrugated sheet made of low temperature steel, the thickness of which is 1; Insulation leakage prevention tank coupled to the support structure of the ship, characterized in that between 2 to 2mm and the depth of the corrugated wrinkles between 30 to 120mm, the secondary sealing wall is made of a metal strike. 2. The fixing of the peripheral portion of the edge of the sheet 33 to the primary sealing wall is localized to the metal insert 28 installed on the corresponding surface of the parts 19, 103 of the primary insulating wall. Tank made by welding. 2. A component according to claim 1, wherein each part 404 of the primary insulating wall has a panel 404a of non-expandable material on the side facing the inside of the tank, and the fixing of the edge of the sheet 33 to the primary insulating wall is at the edge. And a screw (400) evenly distributed on the portion, the screw (400) being fitted into the plate (404a). 4. Tank according to any one of the preceding claims, characterized in that welding is performed on the metal connecting pieces (28,401,402) supported by the parts (19,103,404) of the primary insulating wall (33) to ensure the connection between several adjacent sheets (33). 5. Tank according to claim 4, characterized in that the metal connecting piece is a metal insert (28,401). 5. The panel 404a of claim 4, wherein each component 404 of the primary insulating wall is a panel 404a of non-expandable material facing the inner side of the tank, and the metal connecting piece is screwed into the panel 404a as a metal sheet 402. Tank, characterized in that fixed. The method according to any one of claims 1 to 3, wherein the positive welding between the adjacent sheets 33 covers the connection area of the sheet 33 with a cover plate 403 disposed so as to face the inside of the tank, and the front edge thereof is seated. A tank characterized by being welded to (33). 2. The primary insulating wall according to claim 1, wherein the primary insulating wall is supported on the secondary sealing wall by fixing parts (7, 10, 11, 16) fixed to the supporting structure (1) of the ship, and the fixing part is secondary. A tank, characterized in that the leakage prevention of the secondary sealing wall is maintained by welding that penetrates the sealing wall and connects the fixing part with the strike (4) of the secondary sealing wall. 2. The tank according to claim 1, wherein the part of the secondary insulating wall is a panel of the foam, and the part of the primary insulating wall is filled with insulating particulate material as compartmental casings. 19. 2. The part of the secondary insulating wall is a casing 119 filled with insulating particulate material and the components of the primary insulating wall are the panel 103 of the foam and the wide side facing the inside of the tank is solid, unexpanded. A tank characterized by being covered with a material plate (103c). 2. The support component (7) according to claim 1, wherein the components (3, 119) of the secondary insulating wall are of the same rectangular parallelepiped and the support components (7) used to fix the secondary insulating wall on the support structure (1) are in two orthogonal directions. Arranged to the tank, characterized in that the fixing parts (7, 10, 11, 16) coupled to the primary insulating wall is arranged in a straight line with it. 2. The support component (7) according to claim 1, wherein the support component (7) is a threaded force pin with its bottom welded to the ship's support structure, and the fastener associated therewith is a plate (8) as a nut on the associated force pin (7). Tank (9), which is supported on the component (3,119) area of the secondary insulating wall by fitting (9), and the fixing part is composed of a tube (10) fitted over the support pin (7). 13. The tube (10) according to claim 12, wherein each tube (10) supports at one end away from the support structure (1) a support flange (11) reaching a level with a secondary sealing wall on the one hand and a tip (16) on the other. The tip 16 firstly has a base 11 so that leakage protection can be ensured by welding the second sealing wall's strike 4 to itself and to the support flange 4; The furnace is characterized in that the thread has a fastener (22,18) in cooperation with the fastener, which fastens the parts (19,103) of the primary insulation wall against the support structure (1). Fastener (8) according to claim 13, wherein the wide surface of the panel (3) of the foam is covered with cold non-expandable materials (3d, 3c) and is combined with the supporting component (7) of the secondary insulating wall. Are placed on two parallel projecting edges of the plate 3c coupled with two adjacent panels 3 arranged near the support structure 1 and parallel to the plates 30 arranged near the secondary sealing wall. A tank, characterized in that a flange (5) having a groove (6) is provided for butt welding the metal strike (4) of the secondary sealing wall. 15. Tank according to claim 12 or 14, characterized in that the grooves (6) with which the welding flange (5) is engaged are parallel to one of the rows of support components (7). 16. The casing (19) of the primary insulated wall has an inner compartment (25) and two edges parallel to the weld flange (5) projecting from the secondary sealing wall, the flange (5) having A tank, characterized in that it is embedded in a channel (27) installed in parallel sections (25). 15. The fastener according to claim 13, wherein the edge of the component 19 of the primary thermal insulation wall is parallel to the weld flange 5 and has a detachable tenon 20 coupled with the tip 16 of the fastening component. A tank characterized in that (22,18) is engaged with it. 12. The metal of the secondary insulating wall according to claim 10 or 11, wherein parallel grooves 6 are provided on each of the secondary insulating wall casings 119 on the wide side portion 119b away from the supporting structure 1. A flange 5 for butt welding the strike 4 is engaged therein, and on each edge perpendicular to the grooves 6 there is a tenon 120 which is detachable near the support structure. On the tenon the tank characterized in that the fasteners (8,9) coupled with the supporting parts (7) are supported, and the casing edges not supporting the tenon are in contact with similar edges of the adjacent casing (119). The panel 103 of the foam of the primary insulating wall has a channel 121 engaged with the welding flange 5 of the secondary sealing wall on the side in contact with the secondary sealing wall. The panel 103 and the edge are attached to the adjacent panel 103 so as to be held on the secondary sealing wall by at least one fixing part 7, 10, 11, 16, and the fastener 150 of the fixing part. And 22 and 18 are supported in the jog joint of the cavity installed in the panel 103 and closed by the stopper 151. 20. The casing 119 of claim 19, wherein each casing 119 of the secondary insulating wall is held on the support structure 1 by four supporting parts 7 arranged at each corner thereof. A tank characterized in that two of the parts are arranged on the same line perpendicular to the tenon (120) of the casing (119) to support the tube (10) constituting the fixing part. 19. The tank according to claim 18, wherein the cross section of the grooves (6) into which the welding flange (5) engages is T-shaped and the cross section of the welding flange (5) is L-shaped. 2. The secondary insulating wall components (3, 119) of claim 1 are supported on the support structure (1) by parallel slats (2) of polymerizable resin, which slats (2) are mounted on discontinuous parts. Wherein the theoretical surface of the support structure (1) forms a geometric surface which is defined irrespective of irregular deviations. 2. The connection zone according to claim 1, wherein the connection zone existing between the components 3, 19 and 119 of the thermal insulation wall due to the support component 7 and the fixing components 10, 11 and 16 is tightened after the fasteners are fitted. The rear side of the sheets 4, 33 constituting the sealing wall is filled with a thermal insulation material by slits 14, 24, 114 supported in a suitable joggle joint mounted on the now on the parts 3, 19, 119 of the component. Featured tank. 6. The metal insert 28 of the components 19 and 103 of the primary insulation wall is located in a hole of a type provided in the plate 19b of the component 19 of the primary insulation wall for supporting the primary sealing shock. And can be maintained. 2. The tank of claim 1 wherein the corners of the tank are comprised of a number of identical crosspieces 200, the crosspieces being arranged side by side, each with a tightening half flange 201 and a tank support half flange 202. Tightening half flange 201 constitutes an intersecting flange 200 on an extension of the supporting half flange 202, and the two flanges 200 of all cross pieces of the same corner are the tank corners. Connected along the same edge parallel to the edge of, the fastening half flange 201 of the cross piece 200 is fixed to the supporting structure 1 of the ship, and the supporting half flange 202 is secondary sealed. A tank characterized by being firmly attached to a metal strike (4) on the wall. 26. The cross section 200 of the same tank corner supports the second wedge 203 over the cross section supporting half flange 202 in the corner of the support half flange 202 facing the tank. The second wedges are held on several adjacent crosspieces 200 and covered with the same metal sheet 204 as the strike 4 of the secondary sealing wall, the sheets being substantially coplanar and secondary sealing. Tank characterized in that it is welded to the wall strike (4). 27. A tank according to claim 26, wherein the connecting corner plate (211) is welded to a sheet (204) covering two adjacent secondary wedges (203) of the tank corner. 28. Fasteners (215, 216, 217) according to claim 26 or 27, wherein the first wedges (213, 214) are disposed in a corner of the second wedge (203) and penetrate the secondary sealing wall or extension thereof in a leak-proof manner. And a first wedge (213, 214) supporting the metal corner plate (219) to which the primary sealing wall (233) is welded. 2. The tank corner according to claim 1, wherein the tank corners are arranged such that a plurality of identical secondary angle plates 301 are connected side by side along edges parallel to the edges of the tank corners. Supported by four tubular parts 302a, 302b, 303a, and 303b located perpendicular to the edge in the same plane, a pair of tubular parts 303a, 303b extend toward the tank to provide a secondary angle plate 301. And support a number of identical primary angle plates 312 arranged side by side connected along the same edge parallel to the edges, the primary 312 and secondary 301 angle plates being the same as those used for drying the corresponding sealing walls. A wedge (314, 305) covered by a metal thin film (315, 308) of the same type, the thin film being welded to the wall. 30. The primary 312 and secondary 301 angle plates, respectively, receive two orthogonal positions 314 and 305, and the wedge metal thin sheets 315 and 308 are welded within the corners they form. A tank, characterized by being covered by a corner connecting plate (318, 309). 31. The tubular parts 303a, 303b for supporting the primary angle plate 312 penetrate the secondary sealing wall or its extension in a leakproof manner, and each primary angle plate. A tank, characterized in that two right angle reinforcements 319 are provided at both sides of the tubular parts 303a and 303b supporting them. 32. The tank according to claim 31, wherein the secondary angle plate 301 has a right angle reinforcement 320 perpendicular to each pair of tubular components 302a, 302b that do not extend toward the primary angle plate 312. . 33. The method of claim 32, wherein the lengths of the primary 312 and secondary 301 angle plates are the same when measured parallel to their tops, and the isolation planes of two adjacent primary angle plates 312 are secondary angle plates. Tank characterized in that the perpendicular to the reinforcement (320).

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