KR101742756B1

KR101742756B1 - Support unit for preventing separation of lng storage tank and fixing apparatus for lng storage tank with deck fixing type

Info

Publication number: KR101742756B1
Application number: KR1020150100341A
Authority: KR
Inventors: 성홍근; 서도원; 김기환; 유지원; 윤성태; 이종빈; 정성화; 홍영지; 차동원; 배성한; 신원협; 이성민; 정동호; 조석규; 홍장표
Original assignee: 한국해양과학기술원
Priority date: 2015-07-15
Filing date: 2015-07-15
Publication date: 2017-06-01
Also published as: KR20170009024A

Abstract

The present invention relates to an anti-separation support unit for preventing the separation of the LNG tank while controlling up-and-down movement of an LNG tank installed on a deck of a ship, and an LNG tank fixing apparatus therefor. A tank tension bar configured to be adjustable in length while the other end extends downward and having a latching angle to provide a latching portion at the other end; A deck tension bar having a hook angle formed at one end of the deck so as to be adjustable in length while the other end of the deck is extended at an upper portion thereof and provided with a hook at the other end; And a tension bar connector for securing the tank tension bar and the deck tension bar in a spaced apart state through the engagement angles and for blocking the heat conduction between the tank tension bar and the deck tension bar.

Description

TECHNICAL FIELD [0001] The present invention relates to a detachable support unit for an LNG tank, and a deck fixing type LNG tank fixing unit using the same.

The present invention relates to an anti-separation support unit for an LNG tank and an apparatus for fixing a deck fixed LNG tank, and more particularly to an LNG tank fixing apparatus for an LNG tank by controlling an up / down movement of an LNG tank mounted on a deck of a ship, And more particularly, to a detachment prevention support unit for an LNG tank and a deck fixing type LNG tank fixing apparatus using the same.

Typically, natural gas is transported in a gaseous state via land or sea gas pipelines, or transported to a distant consumer at a liquefied natural gas (LNG) or liquefied petroleum gas (LPG) stored in an LNG carrier.

Here, liquefied natural gas is obtained by cooling natural gas at a cryogenic temperature (approximately -163), and its volume is reduced to approximately 1/600 of that of natural gas in a gaseous state, making it well suited for long distance transportation through the sea.

Accordingly, a LNG transport line for loading LNG into an offshore site by loading the LNG is installed in a storage tank (often referred to as a 'cargo window') capable of withstanding cryogenic temperatures of liquefied natural gas.

These storage tanks can be classified into independent type and membrane type depending on whether the load of the cargo directly acts on the heat insulating material. Membrane-type storage tanks are divided into GT NO 96 type and TGZ Mark type. Separate storage tanks are divided into MOSS type and SPB type.

Typically, a stand-alone storage tank is made by attaching a relatively hard insulating panel, such as polyurethane, to a tank body made of aluminum alloy and is configured to be supported by a support structure within the hull.

Here, when the independent type storage tank is installed in the cargo hold of the hull, the support devices are installed along the outer circumferential surface, so that the movement according to the movement of the ship is buffered.

Specifically, the support device for supporting the storage tank is provided with an anti rolling support which is installed laterally between the bottom surface of the storage tank and the bottom surface of the hull to support the lateral movement according to the rolling of the hull, A d anti-pitching support installed longitudinally between the bottom surface and the bottom surface of the hull to support longitudinal movement due to pitching of the hull, an anti-pitching support provided on the bottom surface of the storage tank for supporting the vertical load of the tank It is composed of vertical support and anti floating support which is installed on the side or upper part of the storage tank to prevent buoyancy of the tank due to accident or separation of the tank from the hull due to up and down sway. have.

However, when the stand-alone storage tank is installed on the deck of the ship rather than the pail, it is very difficult to support the movement of the storage tank due to the movement of the ship because only the bottom surface of the storage tank is fixed to the bottom surface of the deck.

Specifically, when the storage tank is installed on the bottom surface of the tester, it is possible to install the anti-rolling support, the anti-pitching support, and the vertical support described above. However, since the upper surface or the side surface of the storage tank can not be supported, There is a danger that the storage tanks may be separated from the hull if there is a severe up / down yard due to an accident.

Korean Patent Publication No. 10-2015-0059011 Korean Patent Publication No. 10-2012-0002211

SUMMARY OF THE INVENTION It is an object of the present invention to provide an LNG storage tank which is capable of preventing the LNG tank from being damaged when the LNG tank is installed in the upper part of the deck, And an object of the present invention is to provide a detachment prevention support unit for an LNG tank which can prevent the LNG tank from being separated from the LNG tank.

Particularly, the present invention relates to an anti-separation support unit for an LNG tank that can prevent cold air of an LNG tank from being conducted to a hull by connecting the LNG tank to a deck while blocking heat conduction at a connection site and a deck fixing LNG It is an object to provide a tank locking device.

The present invention also relates to a separation preventing support unit for an LNG tank capable of preventing low-temperature brittle fracture of the hull by cryogenic liquefied natural gas by collecting leaking liquid leaking from the LNG tank in the event of an accident, and a deck fixed LNG tank fixing It is another purpose to provide a device.

In order to achieve the above object, a separation preventing support unit for an LNG tank according to the present invention is a separation preventing support unit for preventing separation of the LNG tank while controlling up-and-down movement of an LNG tank installed on a deck of a ship, A tank tension bar having a hook angle formed at one end of the LNG tank so as to be adjustable in length while the other end of the LNG tank extends downward to provide a hook at the other end; A deck tension bar having a hook angle formed at one end of the deck so as to be adjustable in length while the other end of the deck is extended at an upper portion thereof and provided with a hook at the other end; And a tension bar connector for securing the tank tension bar and the deck tension bar in a spaced apart state through the engagement angles and for blocking heat conduction between the tank tension bar and the deck tension bar.

For example, the tension bar connector may include a connector case which is formed in an integral shape and accommodates the latching angle of the tank tension bar and the latching angle of the deck tension bar in a state of being separated from each other while the pipe is engaged with the tank tension bar and the deck tension bar. A first heat insulator installed in the connector case and interposed between a latching angle of the tank tension bar and a latching angle of the deck tension bar to block heat conduction; And a second thermal insulator interposed between the inner side surface of the connector case and the engagement angle of the tank tension bar and the engagement angle of the deck tension bar, .

The tension bar connector may further include a third heat insulating member installed to surround the outer circumferential surface of the connector case to block external air contact of the connector case.

For example, a portion of the tank tension bar and the deck tension bar may be divided, and the divided portions may be connected by a turnbuckle so that the tension can be adjusted by adjusting the length by the turnbuckle.

Further, the present invention may further comprise a container type drip tray which is fixed in a state penetrated by the tank tension bar and collects the leakage liquid of the LNG tank flowing along the tank tension bar when an accident occurs.

In addition, the separation preventing support unit has a container space larger than the drip tray and fixed in a state of being penetrated by the tank tension bar at the lower part of the drip tray to collect the leakage liquid flowing down from the drip tray And an additional drip tray of the drip tray.

Meanwhile, an LNG tank fixing apparatus for fixing a deck fixed type LNG tank according to the present invention is an LNG tank fixing apparatus for supporting a movement of an LNG tank according to movement of a ship while fixing an LNG tank installed on a deck of a ship to a ship, A rolling support unit installed between the LNG tanks and restricting the lateral vibration of the LNG tank; A pitching support unit installed between the deck and the LNG tank to restrain longitudinal vibration of the LNG tank; A vertical support unit installed between the deck and the LNG tank and supporting a vertical load of the LNG tank; And an anti-separation support unit installed in a space between the deck and the LNG tank by the rolling pitching support unit and the vertical support unit to shut off the heat conduction of the LNG tank while controlling the up-and-down movement of the LNG tank The separation preventing support unit may include a tank tension bar having a hook angle formed at one end of the LNG tank so as to be adjustable in length while the other end of the LNG tank extends downwardly and provide a latching portion at the other end; A deck tension bar having a hook angle formed at one end of the deck so as to be adjustable in length while the other end of the deck is extended at an upper portion thereof and provided with a hook at the other end; And a tension bar connector that fixes the tank tension bar and the deck tension bar in a spaced apart state through the engagement angles and blocks heat conduction between the tank tension bar and the deck tension bar.

The rolling support unit and the pitching support unit are respectively installed in the longitudinal center axis and the transverse center axis of the LNG tank, and the vertical support units are constituted in plural and are installed symmetrically on both sides of the bottom surface of the LNG tank And the separation preventive support unit may include a plurality of the separation preventing support units and may be installed along an outer periphery of the LNG tank.

The detachment prevention support unit for the LNG tank and the deck fixed type LNG tank fixing device for the LNG tank according to the present invention are constructed such that the tension bar connector secures the tank tension bar and the deck tension bar in a spaced- The upper and lower peers of the LNG tank are controlled to prevent the LNG tank from being separated from the hull, and at the same time, the low temperature brittle fracture of the hull due to the extremely low temperature of the LNG can be prevented.

In addition, since the drip tray is provided in the tank tension bar, the leaked liquid of the LNG tank is collected in the drip tray without flowing into the connector case or the hull, so that the hull can be prevented from being damaged by the leakage liquid at a cryogenic temperature.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration view showing a deck fixing type LNG tank fixing device provided with a separation preventing support unit according to the present invention; FIG.
2 is a bottom perspective view showing the bottom surface of the LNG tank shown in Fig. 1; Fig.
3 is an enlarged sectional view showing the separation preventing support unit for the LNG tank shown in Fig.
Fig. 4 is an exploded perspective view showing the separation preventing support unit for the LNG tank shown in Fig. 3; Fig.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

The separation preventing support unit 100 for an LNG tank according to the present invention constitutes a part of a fixing device for fixing the independent LNG storage tank T to the upper part of the deck D of the ship, Thereby preventing the LNG tank (T) from being separated from the hull while controlling the up-and-down movement of the LNG tank (T) according to the movement of the ship.

Specifically, the separation preventing support unit 100 for an LNG tank includes a rolling support unit 200, a pitching support unit 300, and a vertical unit 400 together with a deck (not shown) D) and the LNG tank (T).

The rolling support unit 200 is a component for restraining the rolling motion of the LNG tank T in response to the movement of the ship, that is, the leftward and rightward movement in the transverse direction. The pitching support unit 300 includes a LNG tank T ), That is, a pitching motion of the longitudinal direction, that is, longitudinal movement.

2, the rolling support unit 200 is provided along the longitudinal center axis on the bottom surface of the LNG tank T and the pitching support unit 300 is mounted on the bottom surface of the LNG tank T in the lateral direction As shown in FIG.

The vertical support 400 is installed in a symmetrical state on the bottom surface of the LNG tank T while holding a plurality of rules, and supports the vertical load of the LNG tank T.

Here, the configuration of the rolling support unit 200, the pitching support unit 300, and the vertical support 400 is not limited thereto, and a configuration known in the art to which the present invention belongs may be adopted.

The separation preventive support unit 100 fixes the LNG tank T in a bundled state on the deck D of the ship while the LNG tank T controls the deck D). &Lt; / RTI >

The separation preventing support unit 100 includes a deck D of a ship and a deck of a floating floating structure such as an LNG FPSO (Floating, Production, Storage and Offloading) or an LNG FSRU (Floating Storage and Regasification Unit) It can also be applied to fixing the tank (T).

The separation preventing support unit 100 may include a tank tension bar 110, a deck tension bar 120, and a tension bar connector 130 as shown in FIGS.

The tank tension bar 110 is a component for adjusting the tension by adjusting the length of the LNG tank T while connecting the LNG tank T.

1, one end of the tank tension bar 110 is fixed to the LNG tank T and extends downward. As shown in FIG. 3, the tank tension bar 110 includes a latching angle 110a Are integrally provided and engaged with the tension bar connector 130 to be described later.

For example, as shown in FIG. 3, the tension of the tank tension bar 110 can be adjusted by controlling the length of the turnbuckle 115.

That is, the tank tension bar 110 may have a structure in which the tank tension bar 110 is connected by the turnbuckle 115 in a state in which the tank tension bar 110 is formed in a divided manner, and the tension may be adjusted by increasing or decreasing the length by the rotation of the turnbuckle 115.

In addition to the turnbuckle 115, the tank tension bar 110 may have another configuration capable of adjusting the tension by adjusting the length thereof.

The tank tension bar 110 is fixed to the LNG tank T via a member such as a universal joint whose one end is not shown and can allow movement of the LNG tank T in the longitudinal direction or in the lateral direction .

The deck tension bar 120 is a component that adjusts the tension by adjusting the length of the deck tension bar 120 while connecting the deck D with the deck.

That is, the deck tension bar 120 is constructed in the same manner as the above-described tank tension bar 110 and extends to the upper portion of the deck D, and has a locking anchor 120a, And is connected to the tank tension bar 110.

Of course, the deck tension bar 120 can be fixed to the deck D via a universal joint, not shown, and can be adjusted in length by a turnbuckle.

The deck tension bar 120 and the tank tension bar 110 are preferably made of a material having low thermal conductivity and preferably made of a material that is not damaged by extremely low temperature LNG.

The tension bar connector 130 is a component constituting a connecting portion between the tank tension bar 110 and the deck tension bar 120. The tension bar bar 130 includes a hook angle 110a of the tank tension bar 110 and a hanging angle of the deck tension bar 120 The angle 120a is disconnected and the heat conduction between the tank tension bar 110 and the deck tension bar 120 is blocked.

The tension bar connector 130 may include a connector case 131, a first heat insulator 132, and a second heat insulator 133 as shown in FIGS.

3, the connector case 131 is formed in a shape of a hammer, and both sides of the connector case 131 are engaged with the tank tension bar 110 and the deck tension bar 120 and are engaged with the engaging angles 110a and 120a in a spaced- do.

That is, the tank tension bar 110 and the deck tension bar 120 are inserted into the connector case 131 in a penetrating state and the engagement angles 110a and 120a are accommodated in the connector case 131, It does not.

3, the connector case 131 is enclosed by the third heat insulator 134, so that thermal contact with the outside air can be blocked.

3, the first heat insulating member 132 is a member for blocking the heat conduction between the tank tension bar 110 and the deck tension bar 120. The first heat insulating member 132 is a member for preventing heat conduction between the locking angle 110a of the tank tension bar 110, And is interposed between the engaging angles 120a of the bar 120 to heat the heat conduction.

The second insulation member 133 is interposed between the engagement angles 110a and 120a and the inner circumferential surface of the connector case 131 as shown in FIG. 3 to block heat conduction.

The first heat insulator 132 and the second heat insulator 133 function not only to prevent heat conduction but also to prevent the tank tension bar 110 and the deck tension bar 120 from moving up and down with respect to the deck D and the LNG tank T, ) In order to cushion the movement.

The separation preventing support unit 100 of the present invention may further include a drip tray 150 as shown in FIGS.

The drip tray 150 collects the leakage liquid flowing along the tank tension bar 110 when the liquefied gas leaks from the LNG tank T due to accident or the like of the ship, thereby preventing the damage of the hull by the leakage liquid Lt; / RTI >

As shown in FIG. 4, the drip tray 150 is formed in the form of a container and is fixed in a state penetrated by the tank tension bar 110 to collect the leaked gas liquid.

On the other hand, the drip tray 150 may be formed as a slider extending to the outside of the hull, as shown in the drawing, to guide the leakage liquid to the outside of the hull.

4, an additional drip tray 155 may be installed at a lower portion of the drip tray 150.

The additional drip tray 155 is formed as a collection space larger than the drip tray 150 to collect the leakage liquid exceeding the collection capacity of the drip tray 150.

2, the separation preventing support unit 100 including the above-described components is installed along the outer periphery of the LNG tank T and includes a rolling support unit 200, a pitching support unit 300, The LNG tank T is connected to the deck D while limiting the up-and-down movement of the LNG tank T due to buoyancy of the LNG tank T due to an accident or an excessive movement of the hull, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

100: separation preventing support unit
110: Tank tension bar
115: Turnbuckle
120: Deck tension bar
110a, 120a: engaging angle
130: tension bar connector
131: Connector case
132: Primary insulation
133: Secondary insulation
134: Third insulation
150: Drip tray
155: Additional Drip Tray
200: Rolling support unit
300: pitching support unit
400: Vertical unit

Claims

A separation preventing support unit for preventing separation of the LNG tank while controlling up-and-down movement of an LNG tank installed on a deck of a ship,
A tank tension bar having one end fixed to the LNG tank and being adjustable in length with the other end extending downward and having a latching angle to provide a latching portion at the other end;
A deck tension bar having a hook angle formed at one end of the deck so as to be adjustable in length while the other end of the deck is extended at an upper portion thereof and provided with a hook at the other end; And
And a tension bar connector for securing the tank tension bar and the deck tension bar in a spaced apart state through the engagement angles and for blocking heat conduction between the tank tension bar and the deck tension bar,
Wherein the tension bar connector comprises:
A connector case for accommodating the latching angle of the tank tension bar and the latching angle of the deck tension bar in a state of being spaced apart from each other while being fitted to the tank tension bar and the deck tension bar,
A first heat insulator installed in the connector case and interposed between a latching angle of the tank tension bar and a latching angle of the deck tension bar to block heat conduction;
A second heat insulation member interposed between the inner side surface of the connector case and the engagement angle of the tank tension bar and the engagement angle of the deck tension bar, And
And a third heat insulating member installed to surround the outer circumferential surface of the connector case so as to block external air contact of the connector case.

delete

The method according to claim 1,
Wherein the tank tension bar and the deck tension bar comprise:
And the divided portions are connected by the turnbuckle to adjust the tension by adjusting the length by the turnbuckle.

The method according to claim 1,
The separation preventing support unit includes:
And a drip tray in the form of a container for trapping the leakage liquid of the LNG tank which is fixed in a state penetrated by the tank tension bar and flows down along the tank tension bar when an accident occurs.

The method of claim 5,
The separation preventing support unit includes:
And an additional drip tray having a container space larger than the drip tray and configured to be pierced by the tank tension bar at a lower portion of the drip tray to collect the leakage liquid flowing down from the drip tray A separation preventive support unit for LNG tanks.

An LNG tank fixing apparatus for supporting the movement of an LNG tank according to movement of a ship while fixing an LNG tank installed on a deck of a ship to a ship,
A rolling support unit installed between the deck and the LNG tank and restricting lateral vibration of the LNG tank;
A pitching support unit installed between the deck and the LNG tank to restrain longitudinal vibration of the LNG tank;
A vertical support unit installed between the deck and the LNG tank and supporting a vertical load of the LNG tank; And
A separation preventing support unit installed in a space between the deck and the LNG tank by the rolling support unit, the pitching support unit, and the vertical support unit to shut off the heat conduction of the LNG tank while controlling vertical movement of the LNG tank; / RTI >
The separation preventing support unit includes:
A fixing device for a deck fixing type LNG tank, characterized by comprising the separation preventing support unit according to any one of claims 1 to 6.

The method of claim 7,
Wherein the rolling support unit and the pitching support unit are provided respectively in the longitudinal center axis and the transverse center axis of the LNG tank,
Wherein the plurality of vertical support units are provided symmetrically on both sides of the bottom surface of the LNG tank,
Wherein the detachment support unit comprises a plurality of detachment support units and is provided along an outer periphery of the LNG tank.

The method of claim 7,
Wherein the tension bar connector comprises:
A connector case for accommodating the latching angle of the tank tension bar and the latching angle of the deck tension bar in a state of being spaced apart from each other while being fitted to the tank tension bar and the deck tension bar,
A first heat insulator installed in the connector case and interposed between a latching angle of the tank tension bar and a latching angle of the deck tension bar to block heat conduction;
And a second insulation member interposed between the inner side surface of the connector case and the engagement angle of the tank tension bar and the engagement angle of the deck tension bar,
And a third heat insulating member installed to surround the outer circumferential surface of the connector case to prevent external contact with the connector case.

The method of claim 7,
The separation preventing support unit includes:
And a drip tray in the form of a container that is fixed in a state of being penetrated by the tank tension bar and collects the leakage liquid of the LNG tank flowing down along the tank tension bar when an accident occurs.