KR20210011775A - Insulation Panel Arrangement Structure of Liquefied Natural Gas Storage Tank - Google Patents

Abstract

According to the present invention, in an insulation panel placement structure of a liquefied natural gas storage tank, the liquefied natural gas storage tank includes: a secondary insulation wall comprising a plurality of secondary insulation panels arranged in transverse and longitudinal directions of the storage tank; and a primary insulation wall comprising a plurality of primary insulation panels arranged in an upper part of the secondary insulation wall in transverse and longitudinal directions of the storage tank while being placed alternately with the secondary insulation panels such that their edges cross with each other. The storage tank is divided into a special area including a structure protruding towards the inside of the storage tank and a general area excluding the special area. The plurality of primary insulation panels include: a primary general insulation panel placed in the general area and manufactured with the same width and length as the secondary insulation panels such that each corner part can be fixed to the center of an upper part of the secondary insulation panels; a primary peripheral insulation panel placed in the special area and placed in a peripheral part of the protruding structure; and a primary edge insulation panel placed by being separately manufactured in a size corresponding to a space between the primary peripheral insulation panel and the primary general insulation panel, when the primary peripheral insulation panel is placed with an edge end which is not matched with an edge end of the primary general insulation panel placed adjacently. Therefore, the present invention is capable of reducing pressure on a membrane stacked in an upper part.

Description

Insulation Panel Arrangement Structure of Liquefied Natural Gas Storage Tank

The present invention relates to an arrangement structure of an insulation panel of a liquefied natural gas storage tank, and more particularly, a peripheral part of a pump tower base support (PTBS) installed to support a pump tower in the storage tank It relates to the arrangement structure of the insulation panel of the liquefied natural gas storage tank including the arrangement structure of the insulation panel.

Natural gas is transported in gaseous form through gas pipelines on land or sea, or stored in LNG carriers as liquefied natural gas (LNG) and transported to remote consumers. LNG is obtained by cooling natural gas to cryogenic temperatures (approximately -163°C), and its volume is reduced to about 1/600 compared to that of gaseous natural gas, so it is very suitable for long-distance transportation through sea.

Storage tanks that can withstand the cryogenic temperatures of LNG (commonly referred to as'cargo holds') are installed in structures for transporting or storing LNG, such as LNG carriers for loading and unloading LNG to land-required destinations by operating the sea with LNG.

LNG storage tanks can be classified into Independent Tank Type and Membrane Type, depending on whether the load of cargo directly acts on the insulation material. Usually, the membrane type storage tank is divided into GTT's NO 96 type and MARK Ⅲ type, and the independent tank type storage tank is divided into MOSS type and IHI-SPB type.

The NO 96 type storage tank includes primary and secondary sealing walls made of Invar (36% nickel steel) membranes with a thickness of 0.5 to 0.7 mm, and insulators such as perlite powder in a plywood box. It includes primary and secondary insulation walls provided in the form of filled insulation boxes.

The NO 96 type storage tank has almost the same degree of liquid tightness and strength as the primary and secondary sealing walls, so when the primary sealing wall leaks, it can safely support the cargo with only the secondary sealing wall for a considerable period of time.

In addition, since the NO 96 type storage tank is a type of insulation wall filled with insulation material inside a wooden box, it can have high compressive strength and rigidity compared to the MARK Ⅲ type storage tank, and it is easy to weld and has high automation rate.

The MARK Ⅲ type storage tank has a primary sealing wall made of a 1.2mm thick stainless steel (SUS) membrane, a secondary sealing wall made of a triplex, and the upper or lower surface of a polyurethane foam. It includes primary and secondary insulation walls provided with insulation panels bonded to wood plywood.

The primary sealing wall of the MARK III type storage tank has corrugated corrugations to absorb heat shrinkage caused by LNG in cryogenic conditions, and since these corrugated corrugations absorb the deformation of the membrane, there is no significant stress in the membrane.

MARK Ⅲ type storage tank is disadvantageous in terms of installation/manufacturing due to low welding automation rate of the primary sealing wall with corrugated wrinkles, but compared to Invar membrane, stainless steel membrane and triplex are cheaper and easier to install, and polyurethane It is widely used because of its excellent insulation effect.

As described above, the membrane-type liquefied natural gas storage tank is formed by sequentially stacking the secondary insulating wall, the secondary sealing wall, the primary insulating wall and the primary sealing wall from the inner wall of the hull toward the inner space where LNG is received. It has a structure including thermally insulating barriers.

In addition, it is known that components such as an insulating box or an insulating panel are repeatedly arranged to form an insulating wall of the storage tank.

However, the liquefied natural gas storage tank contains special areas such as Liquid dome, Gas dome, and Pump Tower Base Support (PTBS), etc. Due to this, there are areas where the composition of the insulation barrier must be changed.

An object of the present invention is to provide an insulating panel connection structure capable of reducing the burden of a membrane laminated thereon in the insulating panel disposed at the periphery of the special area as described above.

In addition, another technical problem to be achieved by the present invention is to cross-arrange the insulating panels constituting the primary and secondary insulating walls so that the behavior of the panels against the load generated in the storage tank can be stably deviated from each other. And, in consideration of this cross-arrangement, it is to provide a liquefied natural gas storage tank in which an insulation panel is disposed around a special area.

In order to achieve the above object, the present invention provides a secondary insulating wall composed of a plurality of secondary insulating panels arranged in the transverse and longitudinal directions of the storage tank, and the storage tank on the upper side of the secondary insulating wall. In the liquefied natural gas storage tank comprising a primary insulation wall arranged in a transverse direction and a longitudinal direction, the secondary insulation panel and a plurality of primary insulation panels intersected so that the edges are offset from each other, the storage tank It is divided into a special area including a structure protruding toward the inside of the storage tank and a general area excluding the special area, and the plurality of primary insulation panels are disposed in the general area, and the secondary insulation panel and A primary general insulation panel that is manufactured in the same width and length so that each corner is fixed to the upper center of the secondary insulation panel, and a primary peripheral insulation that is disposed in the special area and disposed at the periphery of the protruding structure When the panel and the primary peripheral thermal insulation panel are disposed adjacent to each other and the edge ends of the primary general thermal insulation panels are not aligned, corresponding to the space between the primary peripheral thermal insulation panel and the primary general thermal insulation panel It provides a heat insulation panel arrangement structure of the liquefied natural gas storage tank, characterized in that it comprises a primary insulation panel that is separately manufactured and arranged in size.

The primary peripheral insulation panel is arranged so that the ends in the width direction coincide with the primary general insulation panel, but the ends in the longitudinal direction do not coincide, and the primary insulation panel is arranged in the longitudinal direction of the primary insulation panel. It can be arranged in front and rear along the line.

The primary blank insulation panel is fixed to the upper center of the secondary insulation panel at which one side along the longitudinal direction coincides with the end in the longitudinal direction of the primary general insulation panel, and a corner portion of the corresponding side is disposed at the bottom. Can be.

The sum of the lengths of the primary peripheral insulation panel and the pair of primary insulation panels may correspond to the lengths of the two primary general insulation panels.

The primary general insulation panel, the primary peripheral insulation panel, and the scrap insulation panel are provided with the same width, and the primary general insulation panel and the primary peripheral insulation panel have a width and length of 1:3. In addition, one of the pair of primary insulation panels may have a width and length of 1:1 and the other may have a width and length of 1:2.

Alternatively, the primary general insulation panel, the primary peripheral insulation panel, and the scrap insulation panel are provided with the same width, and the primary general insulation panel is provided in a ratio of 1:3 in width and length, and the primary The peripheral part insulation panel and the pair of primary insulation panels may have a width and length of 1:2.

Another aspect of the present invention for achieving the above object is in a liquefied natural gas storage tank including a special area including a structure protruding in an inward direction of the storage tank, the transverse direction of the storage tank and Secondary insulation wall consisting of a plurality of secondary insulation panels arranged in the longitudinal direction; And a primary insulation wall composed of a plurality of primary insulation panels arranged on top of the secondary insulation wall in the transverse and longitudinal directions of the storage tank, but intersecting the secondary insulation panel and the edge thereof. In addition, the primary insulation wall includes a primary peripheral insulation panel disposed at the periphery of the protruding structure of the special area, the primary insulation panel disposed adjacent to the primary peripheral insulation panel in a width direction, and When the ends along the longitudinal direction are not aligned, the primary insulation panels disposed adjacent to the front and rear sides along the longitudinal direction of the primary peripheral insulation panel and one end along the longitudinal direction coincide. It provides a heat insulation panel arrangement structure of the liquefied natural gas storage tank, characterized in that the length of the primary insulation panel is arranged.

In the liquefied natural gas storage tank according to the present invention, in installing the insulation panel at the periphery of the PTBS installed in the storage tank, the burden acting on the membrane laminated on the upper portion of the insulation panel is connected by a bridge plate. It has the effect of reducing.

In addition, in the liquefied natural gas storage tank according to the present invention, the cross-arrangement between the upper and lower insulation panels of the double insulation wall may be formed throughout the storage tank including the special area. The behavior of the panel against the load can be made stably.

1 is a view schematically showing the thermal insulation structure of a liquefied natural gas storage tank according to the present invention.
Figure 2 is a view showing the secondary insulation panel of the present invention.
Figure 3 is a view showing the first insulation panel of the present invention.
4A and 4B are views sequentially showing a process of installing a secondary peripheral part insulation panel on the periphery of PTBS in the liquefied natural gas storage tank according to the present invention.
5 is a view showing a structural analysis of the secondary peripheral insulation panel installed according to FIG. 4.
6 is a view schematically showing a secondary insulating wall formed in the liquefied natural gas storage tank according to the present invention including PTBS.
7 is a view showing that in the liquefied natural gas storage tank according to the present invention, a primary peripheral insulation panel is installed at the periphery of the PTBS.
8 is a view showing an arrangement structure of a thermal insulation panel of a liquefied natural gas storage tank according to an embodiment of the present invention including PTBS.
9 is a view showing an arrangement structure of a thermal insulation panel of a liquefied natural gas storage tank according to another embodiment of the present invention including PTBS.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the implementation of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings. The same reference numerals shown in each drawing indicate the same members.

In the present invention, the use of the terms'primary' and'secondary' refers to whether the LNG is primarily sealed or insulated based on the LNG stored in the storage tank, or the secondary is sealed or insulated. It was used as a classification standard for whether or not.

Also, by convention, the terms'upper' or'up' applied to an element of a tank refer to a direction toward the inside of the tank, regardless of the direction to gravity, and likewise, the term'lower' or'down' refers to gravity. Regardless of the direction, it refers to the direction toward the outside of the tank.

1 is a view schematically showing the insulation structure of a liquefied natural gas storage tank according to the present invention, FIG. 2 is a view showing a secondary insulation panel of the present invention, and FIG. 3 is a view showing the primary insulation panel of the present invention to be.

Referring to Figure 1, the liquefied natural gas storage tank according to the present invention, the secondary insulation wall 100 made of a plurality of secondary insulation panels 110 arranged on the inner wall of the hull (H), and secondary insulation A secondary sealing wall 200 installed on the wall 100, a primary insulation wall 300 comprising a plurality of primary insulation panels 310 arranged on the secondary sealing wall 200, and the primary It can be seen that the structure includes the primary sealing wall 400 installed on the heat insulating wall 300.

The secondary insulation panel 110 constituting the secondary insulation wall 100 is manufactured as a unit panel in the form of a hexahedron, and a plurality of secondary insulation panels 110 are arranged on the inner wall of the hull H in the transverse and longitudinal directions. As a result, the secondary heat insulating wall 100 can be formed.

The primary insulation panel 310 constituting the primary insulation wall 300 is also manufactured as a unit panel in a hexahedral shape, so that a plurality of primary insulation panels 310 are formed on the secondary sealing wall 200 in the horizontal and vertical directions. By being arranged in the direction, the primary heat insulating wall 300 may be formed.

The primary and secondary insulation panels 310 and 110 include plywood plywood on the top, bottom, or both of the top, bottom, or top and bottom surfaces of the insulation made of polyurethane foam (PUF) or rigid polyurethane foam (RPUF). It may be provided as an adhesive sandwich panel.

The secondary insulating wall 100 may be fixed to the inner wall of the hull H by adhesives or studs such as epoxy mastic, and the primary insulating wall 300 is the secondary insulating wall 100 and In a state in which the secondary sealing wall 200 is interposed between, the primary insulation panel 310 is coupled to a securing device provided on the upper portion of the secondary insulation panel 110. 200) may be fixed in close contact with the upper part.

The secondary sealing wall 200 may be formed of a flat Invar membrane. Specifically, a band-shaped metal plate called an invar strake is continuously welded to a tongue member installed on the secondary insulating panel 110, so that the secondary sealing wall 200 is It may be installed on the upper portion of the secondary insulating wall 100.

A through hole may be formed in the secondary sealing wall 200 so that studs included in the fixing device provided on the upper portion of the secondary insulation panel 110 pass through.

The primary sealing wall 400 is to be sealed by direct contact with LNG, and may be provided with a stainless steel (SUS) membrane in which a plurality of corrugated corrugations are formed toward the inside of the storage tank to absorb shrinkage due to cryogenic temperatures.

The primary sealing wall 400 may be formed of a plurality of unit membranes having a size corresponding to that of the unit panel of the primary insulation panel 310, and a plurality of unit membranes are provided on the top of the primary insulation panel 310. By welding to an anchor strip without gaps, the primary sealing wall 400 may be installed on the primary insulating wall 300.

The liquefied natural gas storage tank according to the present invention has a structure in which the secondary insulation panel 110 and the primary insulation panel 310 disposed thereon are intersected with each other.

Hereinafter, a structure in which the first insulating panel 310 and the second insulating panel 110 are intersected will be described with reference to FIGS. 1 to 3.

As described above, the secondary insulation panel 110 may be provided as a sandwich panel in which the plywood plywood 112 and 113 are adhered to the top, bottom, or both of the top and bottom surfaces of the insulation 111 made of polyurethane foam.

Likewise, the primary insulation panel 310 may also be provided as a sandwich panel to which plywood plywoods 312 and 313 are adhered to the top and/or bottom of the insulation 311 made of polyurethane foam.

In this case, the first and second heat insulating panels 310 and 110 may be manufactured as unit panels in the form of a rectangular parallelepiped having a width and length ratio of 1:3. Preferably, the primary and secondary thermal insulation panels 310 and 110 may be manufactured as unit panels having a size of approximately 1m×3m, but the present invention is not limited thereto.

And, as shown in the drawing, the primary insulation panel 310 may be arranged to be offset from each other so that the corner portion is placed in the upper center of the secondary insulation panel 110, and accordingly, one primary insulation panel 310 Is disposed so as to span the upper surfaces of the four secondary insulating panels 110 disposed at the bottom.

For the cross-arrangement of the primary insulation panel 310 and the secondary insulation panel 110, a fixing device (S1) provided for coupling therebetween is to be disposed inside the corner from the top of the secondary insulation panel 110 I can.

One fixing device (S1) is disposed at the center of the secondary insulation panel 110, and the remaining fixing devices are spaced from the fixing device (S1) arranged in the center by the same distance in the longitudinal direction of the panel forward and backward. (S1) may be disposed respectively.

At this time, the distance (L1) from the fixing device (S1) disposed in the middle of the secondary insulation panel 110 to the fixing device (S1) disposed to be spaced front and rear is the longitudinal direction of the secondary insulation panel (110). It may be arranged to be twice the distance L2 from the edge to the adjacent fixing device S1.

The fixing device S1 may be disposed on the center line C in the width direction on the secondary insulating panel 110. Since the fixing device (S1) disposed at the center in the width direction of the secondary insulation panel 110 receives the same degree of stress from both sides, the fixing device (S1) is displaced in the width direction by the stress acting on the panel. Can be minimized.

In addition, the slit 114 may be formed on the secondary heat insulating panel 110 at a position spaced apart by the same distance in front and rear of each fixing device S1. Since the fixing device S1 disposed between the pair of slits 114 receives the same amount of stress from both sides, the displacement of the fixing device S1 in the longitudinal direction by the stress acting on the panel can be minimized. .

The spacing between the slits 114 formed on the secondary insulation panel 110 may be uniformly formed, and as shown in the drawing, the slit 114 is a fly attached to the top of the secondary insulation panel 110 Wood plywood 112 may also be formed together.

The fixing part S2 provided on the primary insulation panel 310 for coupling with the fixing device S1 may be disposed at a vertical edge of the side end including the four corners of the primary insulation panel 310. The fixing part S2 may be spaced apart so as to have the same spacing along the longitudinal direction of the primary heat insulating panel 310.

The fixing part S2 may be provided as a groove having a semicircle or a fan shape in cross section, and the fixing part S2 by fastening a nut while the stud provided in the fixing device S1 is inserted through the fixing part S2. By pressing the lower plate of the, the primary insulation panel 310 may be fixedly installed on the secondary insulation panel 110.

In the present invention, a preferred embodiment that three fixing devices (S1) are provided on the upper portion of the secondary insulation panel 110 and eight fixing parts (S2) are provided at the vertical corners of the primary insulation panel (310). Is presented as.

According to this embodiment, the fixing device (S1) disposed in the center of the secondary insulation panel 110 is coupled to the fixing unit (S2) formed on the four primary insulation panels 310 at once, and the secondary insulation The fixing unit S2 formed on the two primary heat insulating panels 310 is coupled to the fixing device S1 spaced apart from the center in the panel 110 at one time.

As such, the first insulating panels 310 adjacent to each other may share a fixing device S1 disposed therebetween, and in this embodiment, three fixing devices S1 on one secondary insulation panel 110 Only by providing ), it is possible to secure as many as 8 points of support points of the primary insulation panel 310.

That is, the present invention is to secure the support point of the primary insulation panel 310 to the maximum even with a small number of fixing devices (S1) by the cross-arrangement of the primary insulation panel 310 and the secondary insulation panel 110 It is possible, and thus the stability of the supporting structure is improved, as well as the productivity of the insulation panel is improved.

In addition, in the present invention, the adjacent primary insulation panels 310 are simultaneously fixed by a shared fixing device (S2), so that the relative displacement between adjacent panels is reduced, and the behavior of the panel against the load generated in the storage tank There is an effect that can be achieved stably.

Reference numeral 115 is an insertion groove for inserting a tongue into which the invar strike constituting the secondary sealing wall 200 is welded, and reference numeral 315 is a protrusion of the tongue inserted into the insertion groove 115 And a receiving groove for receiving a bent portion of the secondary sealing wall 200 welded thereto.

In addition, reference numeral 314 denotes a slit formed in the transverse direction and longitudinal direction while having a constant interval on the upper portion of the primary insulation panel 310 to disperse the concentration of stress due to heat shrinkage, and the reference numeral 316 denotes 1 The vehicle sealing wall 400 is an anchor strip to be welded.

Meanwhile, in general, a pump tower for loading or unloading LNG is provided inside the liquefied natural gas storage tank, and PTBS is installed at the bottom of the storage tank to support it. PTBS is made of a cylindrical molding, and is provided in a cone shape whose diameter gradually decreases from the inner wall of the hull to a certain part of the upper part of the primary sealing wall.

For special areas such as PTBS, which are provided with such a special structure, the construction of the insulation panel must be changed differently from the general area of the storage tank.

Hereinafter, the structure of the insulation panel installed around the PTBS in the liquefied natural gas storage tank according to the present invention will be described.

4A and 4B are views sequentially showing a process of installing a secondary peripheral insulation panel on the periphery of PTBS in the liquefied natural gas storage tank according to the present invention, and FIG. 5 is a secondary peripheral insulation panel installed according to FIG. It is a view showing the structural analysis of, Figure 6 is a view schematically showing a secondary insulating wall formed in the liquefied natural gas storage tank according to the present invention including PTBS.

As shown in the drawing, in the secondary heat insulating panel 110' installed on the periphery of the PTBS 500 in the liquefied natural gas storage tank according to the present invention, in the center to accommodate the PTBS 500 provided in a cone shape. A circular space can be provided.

First, referring to Figure 4 (a), the secondary insulation panel 110 ′ installed on the periphery of the PTBS 500 is a pair of inner circumferential surfaces in a semicircular shape to correspond to the outer circumferential surface of the PTBS 500 It may be manufactured by being divided into the secondary peripheral insulation panel 120, and a pair of secondary peripheral insulation panels 120 are installed on the inner wall of the hull H to surround the PTBS 500.

A pair of secondary insulating panels 120 are arranged so that the inner circumferential surfaces of the semicircle provided on each face each other, and accordingly, PTBS in the center of the secondary insulating panel 110' installed at the periphery of the PTBS 500 A circular space in which 500 is accommodated may be formed.

The secondary thermal insulation panel 120 is cut-out so that a semicircular inner peripheral surface is formed on one side of the cut panel after cutting the secondary thermal insulation panel 110 shown in FIG. 2 in half. Can be made. Accordingly, the slit 124 may be formed at the same position as the slit 114 formed in the secondary heat insulating panel 110 in the second peripheral heat insulating panel 120.

The secondary peripheral heat insulating panel 120 includes an insulating material 121 made of polyurethane foam and an upper plywood 122 attached to the upper portion of the insulating material 121.

At this time, a part of the upper plywood 122 may be removed from one end of the secondary peripheral heat insulating panel 120 on which the semicircular inner circumferential surface is formed.

That is, the upper plywood 122 does not extend to the end of one end of the secondary peripheral heat insulating panel 120, and one end of the secondary peripheral heat insulating panel 120 is provided in a state in which the upper surface of the heat insulating material 121 is partially exposed. do.

More specifically, the upper surface of the insulating material 121 between the slit 124 provided closest to one end of the secondary peripheral heat insulating panel 120 and the one end may be provided to be exposed.

And, as shown in (b) of FIG. 4, the connection portions of the secondary peripheral heat insulating panels 120 disposed adjacent to each other are connected by the bridge plate 123. Like the upper plywood 122, the bridge plate 123 may be formed of plywood.

The bridge plate 123 may be disposed so as to span between the neighboring secondary periphery insulating panels 120, and attached to the exposed upper surface of the insulating material 121 of each secondary periphery insulating panel 120 by an adhesive Can be.

The bridge plate 123 may be manufactured to have the same thickness as the upper plywood 122, so that the upper surface may be provided to form the same plane as the upper surface of the upper plywood 122.

When the installation of the bridge plate 123 is completed, the installation of the secondary peripheral insulation panel 120 at the periphery of the PTBS 500 is completed.

In FIG. 6, the structure of the secondary insulation wall 100 formed by a plurality of secondary insulation panels 110 including the secondary peripheral insulation panel 120 can be confirmed.

In this way, after installing the secondary peripheral insulation panels 120 provided as a pair on the periphery of the PTBS 500, a structure connecting the secondary peripheral insulation panels 120 adjacent to each other with a bridge plate 123 According to this, there is an effect of reducing the burden acting on the membrane layer of the secondary sealing wall 200 stacked on the upper portion of the secondary peripheral heat insulating panel 120.

As shown in FIG. 5, the applicant completed the verification of the structural stability of the secondary peripheral insulation panel 120 when heat shrinkage due to cryogenic temperatures through structural analysis.

7 is a view showing that in the liquefied natural gas storage tank according to the present invention, a primary peripheral insulation panel is installed at the periphery of the PTBS, and FIG. 8 is a liquefied natural gas storage according to an embodiment of the present invention including PTBS It is a view showing the arrangement structure of the insulation panel of the tank, Figure 9 is a view showing the arrangement structure of the insulation panel of the liquefied natural gas storage tank according to another embodiment of the present invention including PTBS.

Referring to FIG. 7, the liquefied natural gas storage tank according to the present invention may include a primary peripheral heat insulating panel 320 installed at the periphery of the PTBS 500.

The primary peripheral insulation panel 320 includes a semicircular inner peripheral surface formed to correspond to the outer peripheral surface of the PTBS 500 at the edge of the side, and such a pair of the primary peripheral insulation panels 320 surround the PTBS 500. It may be installed on the upper portion of the secondary insulating wall 100.

7 to 9 shows only one primary peripheral heat insulating panel 320 including an inner circumferential surface so that the arrangement relationship with the secondary heat insulating panel 110 is clearly revealed, but the primary including the inner circumferential surface in a direction facing this It is obvious that the peripheral insulation panel (not shown) can be provided in the same manner.

On the other hand, in the present invention, the first heat insulating panel 310 is fixed to the fixing device (S1) provided at the center of the second heat insulating panel 110, as shown in FIG.

However, since the secondary insulation panel 110 ′ installed on the periphery of the PTBS 500 is formed in the center of the space for accommodating the PTBS 500, a fixing device is not provided in the center, so the primary insulation panel 320 ) Can not be fixed to the upper center of the secondary insulation panels (110, 110').

Therefore, the primary peripheral heat insulating panel 320, as shown in Figure 7, the corner portion should be coupled to the fixing device (S1) disposed to be spaced apart in the longitudinal direction from the center of the secondary heat insulating panels (110, 110') do. According to this arrangement, the first peripheral heat insulating panel 320 does not coincide with the first heat insulating panel 310 disposed adjacent in the width direction and the ends in the length direction.

In order to prevent the structure in which the primary insulation panels 320 and the primary insulation panels 310 adjacent to each other are displaced from each other in this way affect the arrangement of insulation panels in other areas, the primary insulation of the peripheral areas A primary insulation panel 330 separately manufactured in a size corresponding to the space is disposed between the panel 320 and the primary insulation panel 310 disposed closest to the longitudinal direction of the storage tank.

As shown in FIGS. 8 and 9, the primary insulation panel 330 may coincide with an edge in the longitudinal direction of the primary insulation panel 310 having one end disposed adjacent in the width direction, 1 A corner portion of one side of the secondary insulation panel 310 and the end matched may be coupled to a fixing device disposed at the center of the secondary insulation panel 110.

That is, in the present invention, the primary insulation panel 330 is provided so that the structure in which the primary insulation panel 310 is fixed to the upper center of the secondary insulation panel 110 in other areas outside the special area can be maintained. It can be said that it is a configuration that is made.

In the embodiment shown in Figure 8, the primary peripheral portion insulation panel 320 is provided in a size of 1m × 3m, one of the pair of primary insulation panels 330 is 1m × 1m size, the other It is shown to be provided in a size of 1 m x 2 m.

In the present invention, the 1m×3m size is proposed as a preferred size of the primary and secondary insulation panels 310 and 110, because the 1m×3m panel is an optimal panel considering structural stability and manufacturing cost. . If the size is larger than that, the structural stability of the panel decreases, and if the size decreases, the number of panels increases, increasing the manufacturing cost.

In consideration of this point, in the embodiment of FIG. 8, the primary insulation panel 320 at the periphery is manufactured in a method of processing by using the primary insulation panel 310 provided in a 1m×3m size as it is, and the primary insulation Only the panel 330 can be manufactured in a separate size.

On the other hand, in the present invention, the primary peripheral insulation panel 320 and the primary insulation panel 330 are specially applied only to a special area in which a structure such as PTBS is provided, and the required number relative to the total area of the storage tank is Since there are not many, as in the embodiment shown in FIG. 9, both the primary peripheral insulation panel 320 and the primary insulation panel 330 may be manufactured as a 1m×2m size panel.

In the present invention, the PTBS 500 has been described as a representative example of the special area, but it goes without saying that the heat insulation panel arrangement structure of the present invention as described above can be similarly applied to other special areas such as a liquid dome or a gas dome.

In the liquefied natural gas storage tank according to the present invention, the cross-arrangement between the upper and lower insulation panels 310 and 110 of the double insulation wall 300. 100 may be formed throughout the storage tank including a special area, Accordingly, the behavior of the panel against the load generated in the storage tank can be stably achieved.

It is obvious to those of ordinary skill in the art that the present invention is not limited to the described embodiments, and can be variously modified and modified without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the scope of the claims of the present invention.

100: secondary insulation wall 110: secondary insulation panel
111: insulation 112, 113: plywood plywood
114: slit 115: insertion groove
120: secondary peripheral insulation panel 121: insulation
122: upper plywood 123: bridge plate
200: secondary sealing wall
300: primary insulation wall 310: primary insulation panel
311: insulation 312, 313: plywood plywood
314: slit 315: receiving groove
316: anchor strip
320: primary peripheral insulation panel 330: primary scrap insulation panel
400: primary sealing wall
500: PTBS

Claims (7)

A secondary insulation wall consisting of a plurality of secondary insulation panels arranged in the transverse and longitudinal directions of the storage tank, and the secondary insulation arranged in the transverse and longitudinal directions of the storage tank on top of the secondary insulation wall. In the liquefied natural gas storage tank comprising a primary insulation wall consisting of a plurality of primary insulation panels intersecting so that the panels and the edges are aligned with each other,
The storage tank is divided into a special area including a structure protruding toward the inside of the storage tank and a general area excluding the special area,
The plurality of primary insulation panels,
A primary general thermal insulation panel disposed in the general area and manufactured to have the same width and length as the secondary thermal insulation panel, so that each corner is fixed to the upper center of the secondary thermal insulation panel;
A primary peripheral insulation panel disposed in the special area and disposed at the periphery of the protruding structure,
When the primary peripheral insulation panel is disposed adjacent to the primary general insulation panel and the edge ends are not aligned, the size corresponding to the space between the primary peripheral insulation panel and the primary general insulation panel It characterized in that it comprises a primary insulation panel that is manufactured and arranged,
Insulation panel arrangement structure of liquefied natural gas storage tank. The method according to claim 1,
The primary peripheral insulation panel is arranged so that the end in the width direction coincides with the primary general insulation panel but the end in the longitudinal direction does not coincide,
The primary insulation panel is characterized in that it is disposed in the front and rear along the longitudinal direction of the primary peripheral insulation panel,
Insulation panel arrangement structure of liquefied natural gas storage tank. The method according to claim 2,
The primary blank insulation panel is fixed to the upper center of the secondary insulation panel at which one side along the longitudinal direction coincides with the end in the longitudinal direction of the primary general insulation panel, and a corner portion of the corresponding side is disposed at the bottom. Characterized in that,
Insulation panel arrangement structure of liquefied natural gas storage tank. The method of claim 3,
The length of the sum of the lengths of the primary periphery insulation panel and the pair of primary thermal insulation panels corresponds to the lengths of the two primary general insulation panels,
Insulation panel arrangement structure of liquefied natural gas storage tank. The method of claim 4,
The primary general insulation panel, the primary peripheral insulation panel and the scrap insulation panel are provided with the same width,
The primary general insulation panel and the primary peripheral insulation panel are provided in a ratio of 1:3 in width and length,
Any one of the pair of primary scrap insulation panels is provided in a ratio of 1:1 in width and length, and the other is provided in a ratio of 1:2 in width and length,
Insulation panel arrangement structure of liquefied natural gas storage tank. The method of claim 4,
The primary general insulation panel, the primary peripheral insulation panel and the scrap insulation panel are provided with the same width,
The primary general insulation panel is provided in a ratio of 1:3 in width and length,
The primary peripheral insulation panel and the pair of primary insulation panels are characterized in that the width and length are provided in a ratio of 1:2,
Insulation panel arrangement structure of liquefied natural gas storage tank. In the liquefied natural gas storage tank comprising a special area (special area) including a structure protruding in the inner direction of the storage tank,
A secondary insulation wall comprising a plurality of secondary insulation panels arranged in the transverse and longitudinal directions of the storage tank; And
It includes a primary insulation wall consisting of a plurality of primary insulation panels are arranged in the transverse direction and the longitudinal direction of the storage tank on the upper side of the secondary insulation wall, the secondary insulation panel and the edge are intersected so as to be offset from each other, ,
The primary insulation wall includes a primary peripheral insulation panel disposed at the periphery of the protruding structure of the special area,
When the primary thermal insulation panels are disposed adjacent to each other in the width direction and the ends along the length direction do not coincide with each other, the front and rear ends along the length direction of the primary thermal insulation panels Characterized in that the primary insulation panel is arranged adjacent to each other and the primary insulation panel whose length is adjusted to match one end along the length direction,
Insulation panel arrangement structure of liquefied natural gas storage tank.

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