KR102351018B1 - Liquefied natural gas storage iso tank container - Google Patents

Abstract

The present invention relates to an LNG storage ISO tank container, and by enabling liquefied gas to be stored in a container-type tank that can be loaded on a container ship, so that liquefied gas can be transported even by a container ship not equipped with a special cargo hold, By the configuration of the longitudinal support member, the vertical support member, and the outer frame, and the optimized arrangement of these components, it is possible to support the inner and outer tanks and secure the safety according to the load direction, thereby increasing the reliability of the product. .

Description

LNG storage ISO tank container {LIQUEFIED NATURAL GAS STORAGE ISO TANK CONTAINER}

The present invention relates to an LNG storage ISO tank container capable of transporting liquefied gas to a container ship without a special cargo hold by allowing liquefied gas to be stored in a container-type tank that can be loaded on a container ship, and more particularly By improving the support structure of the outer tank and inner tank, as well as the configuration of the longitudinal support member, the vertical support member, and the outer frame, and the optimized arrangement of these configurations, the It relates to an LNG storage ISO tank container capable of securing safety according to the direction of support and load.

Natural gas is consumed in various fields as an economical and eco-friendly energy. The transport efficiency of natural gas is low due to its volume to be transported in a gaseous state. To compensate for this, a method of transporting it in a liquefied natural gas (LNG) state has been proposed.

Liquefied natural gas is a colorless and transparent cryogenic liquid whose volume is reduced to 1/600 by cooling natural gas containing methane as its main component from atmospheric pressure to a cryogenic state of -162°C. is known to be economical.

Liquefied natural gas has been applied to large-scale and long-distance transport in order to satisfy economic feasibility because it takes a lot of cost to construct a production plant and to build a carrier. . However, in the case of transportation using pipelines, geographical restrictions follow, and it may cause problems such as environmental destruction, and CNG has a disadvantage in that transportation efficiency is low. It is often transported on the same ship as the carrier.

However, although LNG transport efficiency is far superior to gaseous natural gas, LNG, which is cryogenic at -163°C, is sensitive to temperature changes and is difficult to handle. must have other special facilities. In addition, the LNG carrier equipped with a cryogenic storage container for transporting LNG has a higher manufacturing cost than a general cargo ship, and it is difficult to repair and takes a lot of time and money if the storage facility is damaged.

Recently, an LNG storage ISO tank container manufactured in a container type is being developed. The length (L), width (W), and height (H) of the LNG storage ISO tank container are those of ISO (International Organization for Standardization). It can be manufactured to have the length, width and height of a container according to the standard. Alternatively, the LNG storage ISO tank container may be manufactured to comply with the standards of a specific country, if necessary.

However, the conventional LNG storage ISO tank container has a problem in that reliability of the product is lowered due to the weak structural safety according to the mounting structure of the outer tank and the support and load direction of the inner tank and the outer tank.

Domestic Patent Publication No. 10-2013-0057322

The present invention improves the support structure of the outer tank and the inner tank, as well as the configuration of the longitudinal support member, the vertical support member, and the outer frame, and the optimized arrangement of these configurations. An object of the present invention is to provide an ISO tank container for LNG storage that can increase the reliability of the product by ensuring safety according to the tank support and load direction.

The LNG storage ISO tank container of the present invention includes an inner tank in which cryogenic liquid is stored; an outer tank installed around the inner tank to block the inner tank from the atmosphere and to protect the inner tank; an outer frame installed outside the outer tank to support the outer tank; Longitudinal support member installed between the inner tank and the outer tank to withstand the load applied in the longitudinal direction; and a vertical support member installed between the inner tank and the outer tank to withstand the load applied in the vertical direction.

The longitudinal support member may include a longitudinal support fitting which is installed in either the outer tank or the inner tank; Longitudinal load absorbing plate installed in either the inner tank or the outer tank at a predetermined distance (gap) from each other so as to withstand the load in the longitudinal direction; And Longitudinal support supported by the fitting frame and Longitudinal support fitted between the interval of the Longitudinal load absorbing plate; includes

An insertion hole may be formed in the longitudinal support fitting frame.

The lower end of the longi studio support may be supported by being inserted into the insertion hole, and the upper end of the longi studio support may be supported in a state of being press-fitted within the gap between the longi studio load absorbing plate.

A plurality of the longitudinal support members may be installed in an inner circumferential direction of the outer tank.

When any one of the longitudinal load absorbing plate and the longitudinal support fitting frame is installed in the outer tank, the other may be installed in the inner tank.

The longitudinal support may use a G10 composite material as a composite material.

The four longitudinal support members are arranged at a predetermined angle by 90° with respect to the center of the longitudinal section of the external tank, and may be arranged in either a + or X shape.

Multi-layered insulation (MLI) is provided on the surface of the inner tank in order to block heat conduction between the inner tank and the atmosphere to prevent the cryogenic liquid in the inner tank from being vaporized, and between the MLI and the outer tank inner circumferential surface It can be maintained in a vacuum.

The vertical support member may include a vertical support frame installed in any one of the outer tank or the inner tank; and a vertical support supported by the vertical support frame to distribute the load in the vertical direction. includes

An insertion hole may be formed in the vertical support frame.

A lower end of the vertical support may be supported by being inserted into the insertion hole, and an upper end of the vertical support may be supported in contact with the inner surface of the external tank.

Four or more vertical support members may be provided in the inner circumferential direction of the outer tank, and may be installed at two or more locations symmetrically on both sides of the outer tank based on a vertical center line of the outer tank.

Four or more longitudinal support members are provided in the outer circumferential direction of the outer tank, and may be installed on only one side based on a vertical center line of the outer tank.

A T stiffener may be installed inside the inner tank at a location where the vertical support is installed.

The T stiffener may be installed at regular intervals inside the inner tank to prevent the inner tank from being crushed when a vacuum is generated due to a drop in pressure of the inner tank or an external shock occurs.

The outer frame may include a bottom frame positioned below the outer tank; and side frames vertically installed on both sides of the bottom frame. can be composed of

The bottom frame may be formed in a rectangular shape, and the side frame may be formed in a square shape.

A first beam for distributing a vertical load may be installed at each corner of the side frame, and an end of the first beam may be disposed toward a center of the side frame.

A pad may be installed at an end of the first beam.

A second beam for distributing a load in a vertical direction is installed at both ends of the lower and upper sides of the side frame, and a plurality of reinforcing beams are installed in the width direction at the bottom frame, and the side frame located at both ends of the reinforcing beam includes A trapezoidal outer tank support bracket may be installed.

A ring stiffener may be installed on the outer periphery of the outer tank at regular intervals to prevent buckling of the outer tank.

The external tank support bracket may be connected and fixed to both sides of the lower end of the ring stiffener, and the second beam may be connected and fixed to both upper and lower ends of the ring stiffener.

The inner tank may be made of stainless steel, and the outer tank connected to the outer frame may be made of carbon steel.

As described above, the LNG storage ISO tank container of the present invention is configured so that liquefied gas can be stored in a container-type tank that can be loaded on a container ship, so that liquefied gas can be transported by a container ship without a special cargo hold. However, by the configuration of the longitudinal support member, the vertical support member, and the outer frame, and the optimized arrangement of these configurations, it is possible to secure the structural safety according to the load direction and support of the inner and outer tanks, thereby increasing the reliability of the product. can

1 is a perspective view showing an LNG storage ISO tank container of the present invention;
Figure 2 is a front view of Figure 1
3 is a longitudinal cross-sectional view showing the inner tank and the outer tank of the present invention;
4 is a cross-sectional view taken along line BB of FIG. 3
5 is a cross-sectional view taken along line CC of FIG.
6 is a cross-sectional view taken along line DD of FIG. 3
7 is a perspective view showing an outer frame of the present invention;
8 is a side view showing a side frame of the present invention;
9 is a side view showing a bottom frame of the present invention;
10 is a perspective view for explaining the location of the longitudinal support member and the vertical support member;
11 is a perspective view for explaining the position of the vertical support member and the T stiffener;
12 is a perspective view illustrating a longitudinal support member;
13 is a perspective view showing a vertical support member;
14 is a cross-sectional view showing a longitudinal support member;
15 is a cross-sectional view showing a vertical support member;

Hereinafter, the LNG storage ISO tank container of the present invention will be described in detail with reference to the accompanying drawings.

The LNG storage ISO tank container of the present invention is a structure for securing safety according to the load direction and support of the inner and outer tanks, CSC (International Convention for Safe Containers), ADR (european Agreement concerning international carriage of Dangerous goods by Road) , RID (Regulations concerning the International carriage of Dangerous goods by Rail) and IMDG (International Maritime Dangerous Goods code) are designed to satisfy all sizes, and can be configured in 20ft and 40ft sizes, holding time 96 days or more, BOR 0.25% or less can be designed as

Hereinafter, the configuration of the longitudinal support member, the vertical support member, and the outer frame of the LNG storage ISO tank container according to the present invention and the optimized arrangement of these configurations will be described in detail with reference to the accompanying drawings and embodiments.

Figure 1 is a perspective view showing an LNG storage ISO tank container of the present invention, Figure 2 is a front view of Figure 1, Figure 3 is a longitudinal cross-sectional view showing the inner tank and the outer tank of the present invention, Figure 4 is line BB of Figure 3 Figure 5 is a cross-sectional view taken along line CC of Fig. 3, Fig. 6 is a cross-sectional view taken along line DD of Fig. 3, Fig. 7 is a perspective view showing an outer frame of the present invention, Fig. 8 is a side view showing a side frame of the present invention, Fig. 9 is a side view showing the bottom frame of the present invention, FIG. 10 is a perspective view for explaining the position of the longitudinal support member and the vertical support member, FIG. 11 is a perspective view for explaining the position of the vertical support member and the T stiffener, FIG. 12 is the longi Fig. 13 is a perspective view showing the vertical support member, Fig. 14 is a cross-sectional view showing the longitudinal support member, and Fig. 15 is a cross-sectional view showing the vertical support member.

Referring to the drawings above, the LNG storage ISO tank container according to the first embodiment of the present invention has an inner tank 110 , an outer tank 120 , an outer frame 130 , a longitudinal support member 140 , and a vertical and a support member 150 .

The inner tank 110 stores a cryogenic liquid such as LNG therein, and may be made of stainless steel.

The outer tank 120 is installed on the periphery of the inner tank 110 to block the inner tank 110 from the atmosphere and protect the inner tank 110, and may be made of carbon steel.

The outer frame 130 is installed outside the outer tank 120 to support the outer tank 120 .

The outer frame 130 may be composed of a bottom frame 131 located on the lower side of the outer tank 120 in the longitudinal direction, and side frames 132 installed on both sides of the bottom frame 131 in the vertical direction. have.

The bottom frame 131 may be formed in a rectangular shape, and the side frame 132 may be formed in a square or rectangular shape.

The first beam 133 for distributing the vertical load is installed at each corner of the side frame 132 and is composed of a total of four, and the end of each first beam 133 is the center (center) of the side frame 132 . ) can be placed toward the A pad 134 for fixing with the external tank 120 may be installed at an end of the first beam 133 .

A second beam 135 for distributing a load in a vertical direction is installed at both ends of the lower and upper sides of the side frame 132, and a plurality of reinforcing beams 136 in the width direction are installed at regular intervals in the bottom frame 131, , A trapezoidal external tank support bracket 137 may be installed on the side frame 132 positioned at both ends of the reinforcing beam 136 . The installation angle of the second beam 135 may be 45°.

Auxiliary brackets 137a and 137b may be installed on the front and rear surfaces of the external tank support bracket 137 .

A plurality of ring stiffeners 138 may be installed on the outer periphery of the outer tank 120 at regular intervals to prevent buckling of the outer tank 120 . Cutting portions 138a for limiting the container size may be formed on both sides of the ring stiffener 138 .

The external tank support bracket 137 may be connected and fixed to both sides of the lower end of the ring stiffener 138 , and the second beam 135 may be connected and fixed to both upper ends and both sides of the lower end of the ring stiffener 138 . Structural stability can be secured by such a connection and fixing structure.

In addition, the longitudinal support member 140 is constant with each other to withstand the load in the longitudinal support frame 141, which is installed in either the external tank 120 or the internal tank 110, in the longitudinal direction. Longitudinal load absorbing plate 142 installed in either the inner tank 110 or the outer tank 120 with a gap (gap) 142a, and longi It includes a longitudinal support 143 fitted between the intervals of the tudinal load absorbing plate 142 . An insertion hole 141a may be formed in the longitudinal support fitting frame 141 . Longitudinal support 143 may use a G10 composite material as a composite material.

The lower end of the longi studio support 143 is supported by being inserted into the insertion hole 141a, and the upper end of the longi studio support 143 is press-fitted in the gap 142a of the longi studio load absorbing plate 142. can be supported

A plurality of longitudinal support members 140 may be installed in the inner circumferential direction of the outer tank 120 , for example, four.

In the present invention, four longitudinal support members 140 are illustrated, but the present invention is not limited thereto and may be arbitrarily changed according to design conditions.

In addition, when any one of the longitudinal load absorbing plate 142 and the longitudinal support fitting 141 is installed in the outer tank 120 , the other may have a structure installed in the inner tank 110 .

For example, as shown in FIG. 14 , when the longitudinal load absorbing plate 142 is fixed to the inner circumferential surface of the outer tank 120 , the longitudinal support fitting 141 is the inner tank 110 . It is fixed to the outer peripheral surface.

Conversely, although not shown in the drawings, when the longitudinal load absorbing plate 142 is fixed to the outer circumferential surface of the inner tank 110 , the longitudinal support fitting 141 is fixed to the inner circumferential surface of the outer tank 120 . do.

In addition, as shown in FIGS. 5, 10 and 11 , four or more longitudinal support members 140 are provided in the outer circumferential direction of the outer tank 120 , and the vertical center line L of the outer tank 120 . ), it can be installed only on either side.

In addition, the four longitudinal support members 140 may be respectively arranged at a predetermined angle by 90° with respect to the center (O) of the longitudinal section of the external tank, and the arrangement form is a cross (+) (shown in FIG. 5). Alternatively, it may be configured in an X-shape (X) (not shown).

MLI (multi-layered insulation) 115 is provided on the surface of the inner tank 110 in order to block the heat conduction between the inner tank 110 and the atmosphere to prevent the cryogenic liquid in the inner tank 110 from being vaporized, A vacuum (V) may be maintained between the MLI 115 and the inner circumferential surface of the outer tank 120 .

The vertical support member 150 is supported on the vertical support frame 151 installed in either the outer tank 120 or the inner tank 110, and the vertical support frame 151 to distribute the load in the vertical direction. It includes a vertical support 152 that is. An insertion hole 151a may be formed in the vertical support frame 151 .

The lower end of the vertical support 152 may be supported by being inserted into the insertion hole 151a, and the upper end of the vertical support 152 may be supported by being in contact with the inner surface of the external tank 120 .

Four or more vertical support members 150 are provided in the inner circumferential direction of the outer tank 120, and are symmetrically located on both sides of the outer tank 120 based on the vertical center line (L) of the outer tank 120 at two or more places. can be installed.

At the position where the vertical support 150 is installed, the T stiffener 160 may be installed inside the inner tank 110 , and the T stiffener 160 is installed at regular intervals inside the inner tank 110 to the inner tank 110 . ) may be configured to prevent the inner tank 110 from being crushed when a vacuum is generated or an external shock occurs due to a drop in pressure.

In the LNG storage ISO tank container of the present invention configured as described above, the outer frame 130 is located on the lower side of the outer tank 120 in the longitudinal direction, the bottom frame 131, and the bottom frame 131 in the vertical direction on both sides. It consists of a side frame 132 installed as ), it is possible to effectively distribute the load in the vertical direction by being disposed toward the center (center).

In addition, the second beams 135 are installed at both lower and upper ends of the side frame 132 , and a plurality of reinforcing beams 136 in the width direction are installed at regular intervals in the bottom frame 131 , and the reinforcing beams 136 are installed at regular intervals in the bottom frame 131 . ), by installing the trapezoidal external tank support bracket 137 on the side frame 132 positioned at both ends, it is possible to effectively distribute the load in the vertical direction.

The ring stiffener 138 installed on the outer periphery of the outer tank 120 serves to prevent buckling of the outer tank 120 .

In addition, the longi studio support member 140 serves to withstand the load in the longitudinal direction. (143) to prevent the slip (slip), the longitudinal support 143 between the longitudinal support fitting frame 141 and the longitudinal load absorbing plate 142 and the inner tank (110) It serves to support directional movement.

In addition, the vertical support member 150 serves to withstand the load in the vertical direction, and the vertical support fitting 151 prevents the vertical support 152 from slipping, and the vertical support 152 is The vertical support serves to support the movement in the vertical direction between the frame 151 and the inner tank (110).

As shown in FIG. 11 , a T stiffener 160 may be installed inside the inner tank 110 at a location where the vertical support 150 is installed, and the T stiffener 160 is a constant inside the inner tank 110 . It is installed at intervals to prevent the inner tank 110 from being crushed when a vacuum is generated due to a drop in pressure of the inner tank 110 or an external shock occurs.

As described above, the LNG storage ISO tank container of the present invention can store liquefied gas in a container-type tank that can be loaded on a container ship, so that even a container ship not equipped with a special cargo hold can transport liquefied gas. However, by the configuration of the longitudinal support member, the vertical support member, and the outer frame, and the optimized arrangement of these configurations, it is possible to secure the structural safety according to the load direction and support of the inner and outer tanks, thereby increasing the reliability of the product. can be raised

110: inner tank
115: MLI (multi-layered insulation)
120: outer tank
130: outer frame
131: bottom frame
132: side frame
133: first beam
134: pad
135: second beam
136: reinforcement beam
137: outer tank support bracket
137a, 137b: auxiliary bracket
138: ring stiffener
138a: cutting part
140: Longitudinal support member
141: Longitudinal support fitting frame
141a: insertion hole
142: Longitudinal load absorption plate
142a: regular interval (gap)
143: Longitudinal support
150: vertical support member
151: vertical support frame
151a: insertion hole
152: vertical support
160: T stiffener
L: vertical center line
V: vacuum

Claims (25)

an inner tank in which cryogenic liquid is stored;
an outer tank installed around the inner tank to block the inner tank from the atmosphere and to protect the inner tank;
an outer frame installed outside the outer tank to support the outer tank;
It is installed between the inner tank and the outer tank to withstand the load applied in the longitudinal direction, and is installed only on either side based on the vertical center line for the longitudinal surface of the outer tank, and the inner circumferential direction of the outer tank Longitudinal support member installed in plurality; and
a vertical support member installed between the inner tank and the outer tank to withstand the load applied in the vertical direction, and symmetrically installed on both sides with respect to the vertical center line for the longitudinal surface of the outer tank at two or more locations; Including, LNG storage ISO tank container. The method according to claim 1,
The longitudinal support member is
Longitudinal support fittings installed in either the outer tank or the inner tank;
Longitudinal load absorbing plate installed in either the inner tank or the outer tank at a predetermined distance (gap) from each other to withstand the load in the longitudinal direction; and
Longitudinal support supported by the longitudinal support fitting frame and fitted between the intervals of the longiportal load absorbing plate; LNG storage ISO tank container comprising a. 3. The method according to claim 2,
The LNG storage ISO tank container, characterized in that the insertion hole is formed in the longitudinal support fitting frame. 4. The method according to claim 3,
An LNG storage ISO tank container, characterized in that the lower end of the Longitudinal support is supported by being inserted into the insertion hole, and the upper end of the Longi Tudinal support is supported while being press-fitted within the gap between the Longi Tudinal load absorbing plate. delete 3. The method according to claim 2,
LNG storage ISO tank container, characterized in that when any one of the longitudinal load absorbing plate and the longitudinal support fitting is installed in the outer tank, the other is installed in the inner tank. 3. The method according to claim 2,
The longitudinal support is an LNG storage ISO tank container, characterized in that it uses a G10 composite material as a composite material. 3. The method according to claim 2,
The LNG storage ISO tank container, characterized in that the longitudinal support members are arranged at a predetermined angle by 90° with respect to the center of the longitudinal section of the external tank, and arranged in either a + or X shape. The method according to claim 1,
Multi-layered insulation (MLI) is provided on the surface of the inner tank in order to block heat conduction between the inner tank and the atmosphere to prevent the cryogenic liquid in the inner tank from being vaporized, and between the MLI and the outer tank inner circumferential surface LNG storage ISO tank container, characterized in that it is maintained in a vacuum. delete The method according to claim 1,
The vertical support member is
a vertical support frame installed in any one of the outer tank or the inner tank; and
a vertical support supported on the vertical support frame to distribute the load in the vertical direction; LNG storage ISO tank container comprising a. 12. The method of claim 11,
The LNG storage ISO tank container, characterized in that the insertion hole is formed in the vertical support frame. 13. The method of claim 12,
An LNG storage ISO tank container, characterized in that the lower end of the vertical support is inserted into the insertion hole and supported, and the upper end of the vertical support is supported in contact with the inner surface of the external tank. The method according to claim 1,
Four or more vertical support members are provided in the inner circumferential direction of the outer tank, and based on the vertical center line of the outer tank, the LNG storage ISO tank container, characterized in that it is installed in two or more places symmetrically on both sides of the outer tank . The method according to claim 1,
The LNG storage ISO tank container in which four or more of the Longitudinal support members are provided in the outer circumferential direction of the outer tank. The method according to claim 1,
LNG storage ISO tank container, characterized in that the T stiffener is installed inside the inner tank at the position where the vertical support is installed. 17. The method of claim 16,
The T stiffener is installed inside the inner tank at regular intervals to prevent the inner tank from being crushed when a vacuum is generated due to a pressure drop in the inner tank or an external shock occurs. tank container. The method according to claim 1,
The outer frame is
a bottom frame positioned below the outer tank; and
side frames vertically installed on both sides of the bottom frame; LNG storage ISO tank container, characterized in that consisting of. 19. The method of claim 18,
The bottom frame is formed in a rectangular shape, the LNG storage ISO tank container, characterized in that the side frame is formed in a square shape. 20. The method of claim 19,
A first beam for distributing a vertical load is installed at each corner of the side frame, and an end of the first beam is disposed toward the center of the side frame. 21. The method of claim 20,
LNG storage ISO tank container, characterized in that the pad is installed at the end of the first beam. 20. The method of claim 19,
A second beam for distributing the load in the vertical direction is installed at both ends of the lower portion and the upper portion of the side frame,
A plurality of reinforcing beams are installed in the bottom frame in the width direction,
The LNG storage ISO tank container, characterized in that trapezoidal external tank support brackets are installed on the side frames located at both ends of the reinforcing beam. 23. The method of claim 22,
An LNG storage ISO tank container, characterized in that ring stiffeners are installed on the outer periphery of the outer tank at regular intervals to prevent buckling of the outer tank. 24. The method of claim 23,
The external tank support bracket is connected and fixed to both sides of the lower end of the ring stiffener, and the second beam is connected and fixed to both upper and lower ends of the ring stiffener. The method according to claim 1,
The LNG storage ISO tank container, characterized in that the inner tank is stainless steel (stainless steel), and the outer tank connected to the outer frame is carbon steel (carbon steel).

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