KR20230000442U - Independent sub-barrier type B-type storage tank - Google Patents

Abstract

In the B-type storage tank of the independent sub-barrier type installed in the hull structure, a support layer including an uppermost support mechanism, a lateral support mechanism and a vertical support mechanism is installed between the main barrier of the B-type storage tank and the hull structure. . At the bottom of the B-type storage tank, a sub-barrier is further installed between the main barrier and the hull structure, and the shape of the sub-barrier is structurally the same as the outer contour of the bottom of the B-type storage tank, or a plate with a fixed collection tank, The sub-barrier is supported and fixed through a vertical support mechanism. The sub-barrier divides the main barrier and the hull structure into two zones, and maintenance is performed on the main barrier, insulation layer, sub-barrier, support layer, and bottom plate in the ship through the divided zone. The present invention eliminates the leakage risk factor of the B-type storage tank, and even if leakage occurs in the B-type storage tank due to unavoidable causes, the present invention can cope with liquid leakage of different scales, resulting in greater damage and loss to the hull structure. There is an effect that can prevent this from happening.

Description

Independent sub-barrier type B-type storage tank

The present invention relates to the field of ship and marine structure technology, and specifically, to an independent sub-barrier type B-type storage tank with a more robust structure and stronger safety.

International Maritime Organization (IMO) "International Rules for the Structure and Equipment of Liquefied Gas Carriers in Bulk" (IGC Code) and "International Safety Rules for Ships Using Gas or Low Flash Point Fuels" (IGF Code), Type B Independent Storage Tank (Hereinafter referred to as "Type B tank") clearly defines the function and definition. Type B tanks are mainly used in large ships and offshore process structures, and their functions include, but are not limited to, liquefied gas transportation and fuel tanks for liquefied gas. The loaded liquefied gas includes, but is not limited to, liquefied natural gas (LNG), liquid ammonia fuel (NH3), liquefied ethylene gas (LEG), and the like.

According to IMO IGF/IGC regulations, some sub-barriers with small leak prevention systems must be installed on type B tanks. Existing B-type storage tanks have support structures installed only at the top and bottom, so the ship shakes horizontally or vertically during sailing, and the shaking of the ship affects the storage tank, so the storage tank also shakes. It increased the risk of failure and damage of the tank, resulting in leakage of liquefied gas.

As shown in FIGS. 1 and 2, conventional B-type storage tanks are largely divided into ① prismatic B-type storage tanks and ② spherical tank-type B-type storage tanks. Among them, the prismatic type B storage tank can well suppress the sloshing effect of the internal liquefied gas, is very flexible in terms of shape design, has a high utilization rate of the volume in the window, and can realize a high matching rate with ship types. However, since the prismatic type B storage tank has many stress condensation points, the safety risk is relatively large, so a detailed stress analysis should be performed. The spherical tank type B type storage tank has good pressure resistance, high structural safety, and low risk of damage. However, since the volume utilization rate in the spherical window is very low, the volume of liquefied gas that can be loaded is limited.

In order to solve the above problems, the present invention implements the structural stability of the B-type storage tank in the process of transporting liquefied gas, so that the sub-barrier efficiently collects a small amount of leaked low-temperature liquid, as well as a large amount of leaked low-temperature liquid in extreme work situations. Transport safety is guaranteed as it can contain liquids. This achieves the purpose of preventing liquefied gas leakage, and also optimizes the functionality in the operating process by increasing the volume utilization rate in the window of the B-type storage tank, thereby providing an independent sub-barrier type B-type storage tank with improved loading efficiency of liquefied gas. there is.

In an independent sub-barrier type B-type storage tank installed in a hull structure, a support layer including an uppermost support mechanism, a lateral support mechanism, and a vertical support mechanism is installed between the main barrier provided in the B-type storage tank and the hull structure. And the B-type storage tank is fixed in the hull structure by the support layer.

Through the support layer installed between the main barrier and the hull structure, and the aggregate and reinforcing frame structure installed on the inner surface of the main barrier, protective measures for the B-type storage tank are prepared in advance to eliminate the leakage risk factor of the B-type storage tank.

Through the support layer, the B-type storage tank is supported in the hull structure and the storage tank is fixed in all directions up, down, left, and right to ensure the safety of the B-type storage tank during navigation. When the ship is shaken horizontally or vertically, the uppermost support mechanism and the vertical support mechanism are coupled to each other, and the two rows of lateral support mechanisms are coupled to each other to constrain the horizontal and vertical direction, so that the type B storage tank is not affected by horizontal or vertical shaking. By limiting the wobbling, the robustness of the B-type storage tank is ensured, so that leakage of liquefied gas in the B-type storage tank can be prevented. Since the lateral support mechanisms are symmetrically installed on both sides of the main barrier, the forces received on both sides of the B-type storage tank are also symmetrical. The uppermost support mechanism and the vertical support mechanism are combined to limit the vertical wobbling of the B-type storage tank, and the lateral support mechanisms on both sides are combined to limit the B-type storage tank from lateral wobbling. ensure the stability of gas transportation; The main barrier may use a metal material having low-temperature performance, such as stainless steel, 9% nickel steel, high manganese low-temperature steel, and aluminum alloy.

Here, the longitudinal direction of the B-type tank is the same as the longitudinal direction of the hull and offshore process structure, that is, the longitudinal direction.

The transverse direction of the B-type tank is the same as the transverse direction of the hull and offshore process structure, that is, the width direction.

The vertical direction of the B-type tank is the same as the vertical direction of the hull and offshore process structure, that is, the height direction.

The support layer of the present invention not only supports the B-type storage tank, but also primarily serves to protect the B-type storage tank, fixes the B-type storage tank to the inside of the hull structure, and attaches it to the B-type storage tank. By clamping the B-type storage tank by applying force in all directions against it, the B-type tank is prevented from being damaged during shelf operation, and furthermore, the leakage of liquefied gas is prevented. Since the uppermost support mechanism and the vertical support mechanism correspond to each other, and the lateral support mechanisms on both sides correspond to each other, when force is applied in a symmetrical structure or a structure in which force is applied in a point-to-point manner is used, less construction materials are used. Even if you use it, you can reach the maximum solid effect, saving construction raw materials and lowering construction costs.

At the bottom of the B-type storage tank, a sub-barrier is further installed between the main barrier and the hull structure, the shape of the sub-barrier is structurally the same as the outer contour of the B-type storage tank bottom, and surrounds the bottom of the B-type storage tank, The highest point of the sub-barrier is higher than or equal to the highest slope of the type B storage tank, the sub-barrier is fixedly connected to the hull structure through a transition mechanism, and the sub-barrier is fixed between the main barrier and the hull structure through a vertical support mechanism. The highest point of the sub-barrier is located 800-1000mm higher than the highest slope of the B-type storage tank. The sub-barrier is installed independently between the main barrier and the hull structure, has the same structural shape as the outer contour of the bottom of the ship, and serves to protect the main barrier or contain leaked liquefied gas. If this structure is used, it satisfies the relevant regulations of IMO IGF/IGC, and at the same time, there is no need to install a leakage protection device or a low-temperature liquid treatment device, and when the liquefied gas in the storage tank leaks, it penetrates the main barrier and is introduced into the sub-barrier along the outer surface of the sub-barrier, and the sub-barrier, like a bowl, is located at the bottom of the B-type storage tank and is prepared to receive leaked liquefied gas.

Since shaking occurs due to the movement of the hull, a certain angle of inclination occurs while the ship staggers horizontally or vertically, and even if the sub-barrier forms an inclination angle in the ship at a higher part than the inclination, it can completely cover the bottom of the main barrier. It can protect the barrier and cope with the leakage situation of liquefied gas.

Along the edge of the top of the sub-barrier, a transition mechanism is installed one turn at regular intervals. The transition mechanism has a deformed steel structure platform with one end welded to the hull structure and the other end welded to a steel clamping member, wherein the steel clamping member is a rectangular groove with an opening on one side, and the opening of the groove faces downward. , the inside is filled with laminated wood, and the uppermost part of the sub-barrier is inserted and fixed into the laminated wood. The width of the laminated timber is preferably 300-400mm, but is not limited thereto. Through the transition mechanism, the robustness of the uppermost part of the sub-barrier is increased, and at the same time, the transition mechanism can be used as a platform for inspection and repair. can enter The width of the steel structure platform is preferably, but not limited to, 800-1000 mm, and when a width of 800-1000 mm is applied, the ladder can be easily installed on the steel structure platform.

The sub-barrier has a flat baffle or an arc-shaped baffle bent upward at the edge, a length greater than or equal to the length of the lowest plane of the B-type storage tank, and less than the maximum length of the B-type storage tank, and a width of the B-type storage tank. a plate greater than or equal to the width of the lowest plane and less than the maximum width of the lower hold space of the B-type storage tank; One or a plurality of collection tanks are fixed to the plate on one side of the sub-barrier adjacent to the main barrier, the collection tank is open upward, and the bottom is fixed to the sub-barrier, and at the outer surface of the main barrier, there is a high risk of liquid leakage from the type B storage tank. The location or area is provided with a guiding device to guide leaked liquid into the collection basin. The guiding device may be a bar-type groove or a tube, and may be any device capable of introducing leaked liquid into the collection tank. The material of the collection tank is the same as that of the sub-barrier, and the collection tank and the sub-barrier are fixedly connected by a material coupling method. The collection tank can be installed at any location on the sub-barrier, the installation location of the collection tank can be changed, and it can be located avoiding the vertical support mechanism or other important members at the bottom of the B-type storage tank, and the collection tank is located at the corner of the sub-barrier It is preferable to install in The sub-barrier is a plate type structure that is coupled with the collection tank and the flow device, so it thoroughly copes with small or large leaks of liquid, while saving space and being more flexible.

The sub-barrier divides the area between the main barrier and the hull structure into two areas, the outer surface of the main barrier and the inner surface of the sub-barrier form a first area, and the outer surface of the sub-barrier and the inner surface of the hull structure form a first area. form the second zone. The operator can enter the first zone or the second zone to inspect and repair equipment in the first zone or the second zone. Here, a gas leakage detection device may be installed in the first zone, and inactivation gas may be filled in the first zone and the second zone. The sub-barrier uses a thin plate structure, and the thickness is less than or equal to the plate thickness of the main barrier, preferably 10mm-15mm, but is not limited thereto. The sub-barrier is mainly a water tank containing a small amount of leaked liquid. It protects the hull structure from being affected by low-temperature liquid and transmits only mechanical loads to the side of the force mechanism, so it can be installed in a thin plate form to optimize the weight of the structure, Cost can be saved.

A first bending prevention layer is coated on the inner surface of the sub-barrier, the first bending-prevention layer is a T-shaped member, the T-shaped member is welded to the inner surface of the sub-barrier, and the horizontal connecting line and the vertical connecting line of the T-shaped member intersect. An overall grid type is formed, and since a uniform force is applied to the inner surface of the sub-barrier by this grid-type structure, the sub-barrier can be controlled as a whole to prevent shrinkage and deformation due to cooling. Therefore, when liquid leaks, it can contain liquefied gas better, so even if a leak occurs in the B-type storage tank, the safety of the B-type storage tank can be guaranteed. In other words, it provides protective measures for type B storage tanks to lower losses by reducing the risk factor.

An uppermost support mechanism is installed in a row along the longitudinal direction of the B-type storage tank at the top of the main barrier; On both sides of the main barrier, lateral support mechanisms are installed in a row along the height direction of the B-type storage tank; At the bottom of the main barrier, vertical support mechanisms are installed in a plurality of rows along the longitudinal direction of the B-type storage tank. The entire support layer consisting of the uppermost support mechanism, the vertical support mechanism and the lateral support mechanism firmly fixes and clamps the type B storage tank in the middle of the hull structure, so that the type B storage tank does not suffer from horizontal shaking, longitudinal shaking or other external It prevents leakage of liquefied gas by protecting the B-type storage tank from being affected by impact. An uppermost support mechanism is installed in a row at the top of the main barrier, a plurality of uppermost support mechanisms are installed on the uppermost portion of the main barrier, and a plurality of uppermost support mechanisms are installed at regular intervals along the longitudinal direction of the B-type storage tank. On both sides of the main barrier, lateral support mechanisms are installed in a row along the height direction of the B-type storage tank, and are installed at regular intervals between the lateral support mechanisms. At the bottom of the main barrier, vertical support mechanisms are installed in a plurality of rows along the longitudinal direction of the B-type storage tank, and are installed at regular intervals between the vertical support mechanisms. The uppermost support mechanism, the lateral support mechanism, and the vertical support mechanism are fixed to the top of the main barrier, the side of the main barrier, and the bottom of the main barrier, respectively, in a modular manner to form a complete support layer.

The distance between the sub-barrier and the main barrier is 950-1050 mm, and the distance between the sub-barrier and the hull structure is 650-750 mm. That is, the interval of the first zone is 950-1050mm, and the interval of the second zone is 650-750mm, and since the two zones are installed, inspectors can easily enter the hull structure, and the outer surface and sub-surface of the main barrier of the B-type storage tank The inner surface of the barrier is inspected and the outer surface of the main barrier is monitored in real time. Because it can be repaired immediately in the event of an abnormality, it is possible to prevent leakage of liquefied gas because the problem is solved before leakage of liquefied gas.

In the B-type storage tank of the independent sub-barrier type, an insulating layer is additionally coated on the outer surface of the B-type storage tank. The insulating layer is in contact with the outer surface of the main barrier and adhered to the outer surface of the main barrier. Since a complete coating layer having a certain thickness is formed on the outside of the B-type storage tank, there is an effect of keeping warm and blocking heat.

Since the structural arrangement of the independent sub-barrier and the first anti-bending layer in the sub-barrier divide the space between the bottom of the B-type storage tank and the hull structure into two parts, sufficient space is created between the B-type storage tank and the hull structure, resulting in a main barrier, Sub-barriers and hull structures can be inspected and repaired from time to time, and problems can be found and resolved immediately.

The structure of the present invention eliminates the leakage risk factor of the B-type storage tank, and even if leakage occurs in the B-type storage tank due to an unavoidable cause, the technical solution of the present invention immediately solves the leakage of liquefied gas to prevent leakage of liquefied gas. This has the effect of preventing greater damage and loss to the hull structure. In addition, the present invention can cope with liquid leakage of different scales.

The sub-barrier is an independent structure and is located between the main barrier and the hull structure, and has an inspection space required during operation and maintenance. It is easily accessible and contributes to the safety and maintenance of the structure.

By separating the sub-barrier independently from the main barrier or the surface of the hull structure to relieve some of the stress that exists in the connection between the sub-barrier and the surrounding structure, the effect of hull motion or mechanical vibration on the structural safety of the sub-barrier is significantly reduced. lower it

The sub-barrier itself is a container for the leaked liquid, and has a large cover area and can flexibly handle the flowing low-temperature liquid. If the leakage amount is small, the leaked liquid leaks in a drip manner, The leaked liquid flows into the collection tank through the guiding device, the collection tank collects the leaked liquid, and the dripped liquid is also evaporated into a gas in the inner space formed by the main barrier and the sub-barrier to be removed through an inert gas removal system; If the amount of leakage is large, the sub-barrier itself stores the leaked liquid for a certain period of time, securing time for follow-up inspection, repair and emergency treatment. In addition, since the existing sub-barrier lacks sufficient inspection and repair space, a separate leak liquid collection and treatment system must be installed. This significantly increases the cost of installation and maintenance.

1 is a schematic diagram showing the structure of a conventional prismatic B-type tank having an anti-shattering film.
Figure 2 is a schematic diagram showing the structure of a conventional spherical tank type B-type storage tank.
3 is a schematic view showing the front structure of the storage tank and hull structure of the present invention.
4 is a schematic diagram showing a cross-sectional structure of AA in FIG. 3;
5 is a schematic diagram showing the structure of a transition mechanism viewed from the front.
6 is a schematic diagram showing the structure of a transition mechanism viewed from above.
7 is a schematic view from the front of a structure in which both side walls of the sub-barrier are perpendicular to the bottom, and the highest point of the sub-barrier of this type is higher than the highest slope of the B-type storage tank and is connected to the hull structure through a transition mechanism. .
8 is a schematic view from the side of a structure in which both side walls of the sub-barrier are perpendicular to the bottom, and the highest point of this type of sub-barrier is higher than the highest slope of the B-type storage tank and is connected to the hull structure through a transition mechanism. .
9 is a schematic view from the front of a structure in which both side walls of the sub-barrier form an obtuse angle with the bottom, and the highest point of this type of sub-barrier is higher than the highest slope of the B-type storage tank and is connected to the hull structure through a transition mechanism. am.
10 is a schematic view from the side of a structure in which both side walls of the sub-barrier form an obtuse angle with the bottom, and the highest point of this type of sub-barrier is higher than the highest slope of the B-type storage tank and is connected to the hull structure through a transition mechanism. am.
11 is a schematic view of the structure of FIGS. 8, 9, and 10 viewed from above.
12 is a schematic view from the front of a structure in which both side walls of the sub-barrier are perpendicular to the bottom, and the highest point of the sub-barrier of this type is the same as the highest slope of the B-type storage tank, and is connected to the hull structure through a transition mechanism. am.
13 is a schematic view from the side of a structure in which both side walls of the sub-barrier are perpendicular to the bottom, and the highest point of the sub-barrier of this type is the same as the highest slope of the B-type storage tank, and is connected to the hull structure through a transition mechanism. am.
14 is a type in which the side walls of the sub-barrier form an obtuse angle with the bottom, and the highest point of the sub-barrier of this type is the same as the highest slope of the B-type storage tank, and the structure connected to the hull structure through the transition mechanism is viewed from the front it is a schematic
15 is a type in which the side walls of the sub-barrier form an obtuse angle with the bottom, and the highest point of this type of sub-barrier is the same as the highest slope of the B-type storage tank, and the structure connected to the hull structure through the transition mechanism is viewed from the side it is a schematic
16 is a schematic view of the structure of FIGS. 13, 14, 15, and 16 viewed from above.
17 is a schematic diagram showing a structure in which the highest point of the sub-barrier is the same as the highest slope of the B-type storage tank and the uppermost part of the sub-barrier is connected to the transition mechanism.
18 is a schematic view of a structure in which an inclined structure is applied to the bottom of a B-type storage tank and a sub-barrier is a plate, viewed from the front.
19 is a schematic view of the structure of FIG. 18 viewed from the side.
20 is a schematic view of a structure in which a circular arc structure is applied to the bottom edge of a B-type storage tank and a sub-barrier is a plate, viewed from the front.
21 is a schematic view of the structure of FIG. 20 viewed from the side.

In connection with the accompanying drawings, the present invention will be described in more detail.

Example 1

As shown in FIGS. 3 and 4, the B-type storage tank of the independent sub-barrier type includes a B-type storage tank 1 equipped with a main barrier 3, and the main barrier uses a metal material of stainless steel. And, the B-type storage tank is installed in the hull structure (2), a support layer is installed between the hull structure and the main barrier, and the B-type storage tank is fixed in the hull structure through the support layer. At the bottom of the B-type storage tank, a sub-barrier 4 is further installed between the main barrier and the hull structure, and the shape of the sub-barrier is the same as the outer contour of the bottom of the B-type storage tank (Figs. 7, 8, 9, 10, As shown in 12, 13, 14, and 15), the highest point of the sub-barrier is 900 mm higher than the highest slope of the B-type storage tank, one end of the transition mechanism is welded to the hull structure, and the other end is of the sub-barrier. connected to the top Along the edge of the uppermost part of the sub-barrier, a transition mechanism is installed one turn (as shown in FIGS. 11 and 16) at regular intervals. As shown in Fig. 5 and Fig. 6, the transition mechanism has a deformed steel structure platform 54, the steel structure platform has a width of 900 mm, and when applying this width, a ladder can be installed on the steel structure platform, so that the operator can Depending on the ladder, it is easy to get into the area between the hull structure and the main barrier. One end of the steel structure platform is welded to the hull structure, and a steel clamping member 52 is installed at the other end. 51 is filled, the laminated wood is adhesively fixed to the groove of the clamping member through an adhesive, and the uppermost part of the sub-barrier is inserted into the laminated timber and adhesively fixed to the laminated timber through an adhesive. A knee plate 53 is welded to the connection between the steel structure platform and the hull structure to increase the rigidity of the structure. Transition with an inclination angle between the clamping member and the steel structure platform can realize a change in width. By applying a flexible connection between the laminated wood and the steel structure, the load of the hull structure is prevented from being transferred to the sub-barrier. This not only enhances the stability of the side wall of the sub-barrier, but also prevents a large hull load from directly acting on the thin plate of the sub-barrier.

The support layer is a complete support layer composed of an uppermost support mechanism (5), a lateral support mechanism (6) and a vertical support mechanism (7). The top support mechanism is installed at the top of the main barrier, is installed in a row along the longitudinal center line of the B-type storage tank, has a rectangular shape as a whole, and is horizontally placed on the reinforcing frame 12 provided in the B-type storage tank. It lies perpendicular to the longitudinal centerline of the B-type storage tank. The uppermost support mechanism increases the holding force and the gripping area of the uppermost part of the B-type storage tank, thereby strengthening the gripping force of the uppermost part of the B-type storage tank and controlling the B-type storage tank more efficiently.

At the bottom of the main barrier, vertical support mechanisms are installed in multiple rows along both sides of the longitudinal centerline of the B-type storage tank, and the vertical support mechanisms are located on the reinforcing frame 12 at the bottom of the B-type storage tank. Since the top support mechanism corresponds to the vertical support mechanism, the gripping force for the uppermost part and the lower part of the B-type storage tank correspond to each other, and the gripping force applied to the top and bottom corresponds to each other, so that the B-type storage tank can be fixed and supported more efficiently. can The combination of the top support mechanism and the vertical support mechanism effectively secures the B-type storage tank.

On both sides of the main barrier, lateral support mechanisms are installed in a row along the center line in the height direction of the main barrier, and the lateral support mechanisms have a rectangular shape as a whole and are placed horizontally on the longitudinal reinforcing frame structure 12, They are perpendicular to the center line in the height direction. In the B-type storage tank, lateral support mechanisms are installed in a row on the center line in the height direction on both sides, and the lateral support mechanisms are placed horizontally on the vertical reinforcing frame structure. Since the bearing capacity and gripping area for the side are increased, it is possible to efficiently fix the B-type storage tank in the transverse direction to prevent the effect of the horizontal shaking of the ship on the B-type storage tank and reduce the risk of leakage. The top support mechanism, the lateral support mechanism and the vertical support mechanism form a complete support layer, covering the outside of the main barrier of the type B storage tank.

At the bottom of the storage tank, a sub-barrier 4 is installed between the main barrier and the hull structure, the shape of the sub-barrier is structurally the same as the outer contour of the storage tank bottom, inserted into the middle of the vertical support mechanism, and It is fixed by the directional support mechanism. As shown in FIG. 3, the sub-barrier is located at an inclined position of the B-type storage tank, and a vertical support mechanism is installed on the sub-barrier, and the sub-barrier is placed between the hull structure and the main barrier through the vertical support mechanism. fix it The sub-barrier divides the main barrier and the hull structure into two zones, the inner surface of the sub-barrier and the outer surface of the main barrier form a first zone, and the outer surface of the sub-barrier and the inner surface of the hull structure form a second zone. form The distance between the sub-barrier and the main barrier is 1000 mm, the distance between the sub-barrier and the hull structure is 700 mm, and when the distance is set to 1000 mm and 700 mm, the outer surface of the main barrier when the operator enters the first zone, the second zone, Sufficient space can be secured for inspection and repair of the sub-barrier and internal surfaces of the hull structure. A detection device is further installed in the first zone, and an inert gas is filled, and the detection device measures the leaked gas, so that the problem can be immediately found and solved.

A first bending prevention layer is installed on the inner surface of the sub-barrier, the first bending-prevention layer is a T-shaped member 9, and a plurality of T-shaped members are arranged on the inner surface of the sub-barrier at regular intervals to form a grid-type first It is possible to form a bending prevention layer, prevent deformation of the sub-barrier by cooling, and also relieve bending stress of the sub-barrier by cooling. On the outer surface of the main barrier, one layer of thermal insulation layer 8 is bonded, and the thermal insulation layer is broken at the positions of the uppermost support mechanism, the lateral support mechanism and the vertical support mechanism.

Example 2

The independent sub-barrier type B-type storage tank includes a B-type storage tank (1) equipped with a main barrier (3), and the B-type storage tank is installed in the hull structure (2), between the hull structure and the main barrier A support layer is installed, and the structure of the support layer is the same as that of the support layer according to Example 1, and the B-type storage tank is fixed in the hull structure through the support layer. At the bottom of the B-type storage tank, a sub-barrier is further installed between the main barrier and the hull structure, the shape of the sub-barrier is the same as the outer contour of the bottom of the B-type storage tank, the sub-barrier is supported and fixed by a vertical support mechanism, , the sub-barrier divides the space between the main barrier and the hull structure into a first zone and a second zone. The distance between the sub-barrier and the main barrier is 900mm, and the distance between the sub-barrier and the hull structure is 600mm. Sufficient space can be secured for inspection and repair of internal surfaces of barriers and hull structures. The highest point of this sub-barrier is the same as the highest point of the slope of the B-type storage tank, that is, the highest point of the sub-barrier is located at the inclined position of the B-type storage tank.

As shown in FIG. 17, when the highest point of the sub-barrier is the same as the highest point of the inclined position of the B-type storage tank, the uppermost part of the sub-barrier is obliquely inserted into the clamping member provided in the transition mechanism and adhered to the laminated wood inside the clamping member. It is fixed. A transition mechanism is installed one turn along the uppermost edge of the sub-barrier at regular intervals, and the structure of the transition mechanism is the same as that of the transition mechanism according to Example 1. A transition mechanism is installed along the uppermost edge of the sub-barrier at regular intervals, the width of the steel structure platform provided in the transition mechanism is 900mm, one end of the steel structure platform is welded to the hull structure, and the other end is connected to a steel clamping member. It is welded, and the laminated wood is bonded within the clamping member. The width of the laminated wood is 350 mm, and the uppermost part of the sub-barrier is inserted obliquely into the laminated wood and adhesively fixed to the laminated wood. This ensures the robustness of the uppermost part of the sub-barrier.

Example 3

As shown in FIGS. 18 and 19, in the B-type storage tank of the independent sub-barrier type, in the horizontal direction, the bottom edge of the main barrier 3 has an inclined structure, and the inclined angle is preferably 45 °, but is not limited thereto. In the lateral direction, the edge of the bottom of the main barrier has a right angle structure, all edges and face to face transitions are all rounded angles, and the radius is preferably, but not limited to, 100mm-1000mm. Therefore, the stress concentration of some structures is reduced and the pressure acceptance efficiency of the structures is improved. An insulating layer 8 is placed on the outer surface of the main barrier.

The sub-barrier 4 is installed between the main barrier 3 and the hull structure 2, the sub-barrier is connected to the main barrier and the hull structure through a vertical mechanism, and is inserted in the middle of the vertical support mechanism. The sub-barrier is one plate, with a thickness of 15 mm, a length greater than or equal to the lowest flat length of a type B storage tank, less than the maximum length of a type B storage tank, and a width greater than the lowest flat width of a type B storage tank. It is equal to or smaller than the maximum width of the B-type storage tank. Collecting tanks 11 containing leaked liquid are installed at four corners on one side of the sub-barrier adjacent to the main barrier. There is a flat baffle bent upward at the edge of the plate, transitioning to a round angle with the bottom of the sub-barrier, and the radius of the round angle is preferably but not limited to 50mm-500mm, and the baffle is combined with the plate to form a tray. The liquid accommodating effect is more excellent. An inspection and repair space of 600mm-700mm is reserved between the highest point of the sub-barrier and the outer surface of the insulation layer, and an inspection and repair space of 600mm-700mm is reserved between the bottom of the sub-barrier and the hull structure.

A high-risk location or zone for liquid leakage is determined through fatigue and crack expansion calculation, and a guiding device is installed on the outer surface of the main barrier of the B-type storage tank. is extended When a small amount of liquid leakage occurs, the baffle induces the leaked liquid to flow into the collecting vessel, and the collecting vessel collects the leaked liquid and waits for subsequent artificial treatment.

Example 4

The B-type storage tank of the independent sub-barrier type is as shown in FIGS. 20 and 21, and the present invention will be described in more detail in conjunction with the accompanying drawings. In the transverse direction, the bottom edge of the main barrier 3 has a circular arc structure, preferably with a radius of 500 mm-10000 mm, but is not limited thereto, and in the lateral direction, the bottom edge has a circular arc structure with a radius of 500 mm-10000 mm. Not limited. An insulating layer 8 is placed on the outer surface of the main barrier.

The sub-barrier 4 is installed between the main barrier 3 and the hull structure 2, the sub-barrier is connected to the main barrier and the hull structure through a vertical mechanism, and is inserted in the middle of the vertical support mechanism. The sub-barrier is a plate, the length of which is greater than or equal to the lowest flat length of the B-type storage tank, less than the maximum length of the B-type storage tank, and the width is greater than or equal to the lowest flat width of the B-type storage tank, and B It is smaller than the maximum width of the type storage tank. On one side of the sub-barrier adjacent to the main barrier, a collection tank 11 containing leaked liquid is installed in a location or area that does not interfere with the vertical support mechanism. There is an arc baffle bent upward at the edge of the plate, and it is preferable that the round angular radius of the arc baffle is 50 mm-1000 mm, but is not limited thereto. An inspection and repair space of 600mm-700mm is reserved between the highest point of the sub-barrier and the outer surface of the insulation layer, and an inspection and repair space of 600mm-700mm is reserved between the bottom of the sub-barrier and the hull structure.

A high-risk location or zone for liquid leakage is determined through fatigue and crack expansion calculation, and a guiding device is installed on the outer surface of the main barrier of the B-type storage tank. is extended When a small amount of liquid leakage occurs, the baffle induces the leaked liquid to flow into the collecting vessel, and the collecting vessel collects the leaked liquid and waits for subsequent artificial treatment.

The B-type storage tank structure applied to the present invention protects the B-type storage tank from all directions, eliminates risk factors that can cause liquefied gas leakage, and inspects and monitors the B-type storage tank in real time to ensure B-type storage tanks are in the process of sailing. The stability of the type storage tank can be guaranteed.

2 hull structure 3 main barrier
4 Sub Barrier 5 Top Support Mechanism
6 Lateral Support Mechanism 7 Vertical Support Mechanism
8 Insulation layer 9 T-shaped member
10 Shatterproof film 11 Collecting tank
12 Reinforcing frame 51 Laminated timber
52 clamping element 53 knee plate
54 steel structure platform

Claims (9)

In the B-type storage tank of the independent sub-barrier type installed in the hull structure,
A support layer including an uppermost support mechanism 5, a lateral support mechanism 6 and a vertical support mechanism 7 is installed between the main barrier 3 and the hull structure 2 provided in the B-type storage tank, The B-type storage tank is fixed within the hull structure by a support layer;
At the bottom of the B-type storage tank, a sub-barrier 4 is further installed between the main barrier and the hull structure, and the shape of the sub-barrier is structurally the same as the outer contour of the bottom of the B-type storage tank. the uppermost point of the sub-barrier is higher than or equal to the highest slope of the B-type storage tank, and the uppermost part of the sub-barrier is fixedly connected to the hull structure through a transition mechanism; The sub-barrier is fixed between the main barrier and the hull structure through a vertical support mechanism, and an independent sub-barrier type B-type storage tank, characterized in that the first bending prevention layer is coated on the inner surface of the sub-barrier. The method of claim 1,
The sub-barrier has a flat baffle or an arc-shaped baffle bent upward at the edge, a length greater than or equal to the length of the lowest plane of the B-type storage tank, and less than the maximum length of the B-type storage tank, and a width of the B-type storage tank. a plate greater than or equal to the width of the lowest plane and less than the maximum width of the lower hold space of the B-type storage tank; A guiding device is installed on the outer surface of the main barrier at a location or area with a high risk of liquid leakage of the B-type storage tank, and one or a plurality of collection tanks 11 are fixed to a plate on one side of the sub-barrier adjacent to the main barrier, The independent sub-barrier type B-type storage tank, characterized in that the collection tank 11 is opened upward, the bottom is fixed to the sub-barrier, and the guiding device induces the leaked liquid to flow into the collection tank. The method of claim 1,
An independent sub-barrier type B-type storage tank, characterized in that the transition mechanism is installed one round at regular intervals along the uppermost edge of the sub-barrier. The method of claim 3,
The transition mechanism has a deformed steel structure platform 54 with one end welded to the hull structure and the other end welded to a steel structure clamping member 52, which has a rectangular groove with an opening on one side. As, the opening of the groove is directed downward, the inside is filled with laminated wood 51, and the uppermost part of the sub-barrier is inserted and fixed into the laminated wood. The method of claim 1,
The highest point of the sub-barrier is an independent sub-barrier type B-type storage tank, characterized in that it is located 800-1000mm higher than the highest slope of the B-type storage tank. The method of claim 1,
The first bending prevention layer is a T-shaped member 9, and the T-shaped member is welded to the inner surface of the sub-barrier to form a first bending-prevention layer having a grid shape as a whole. B type storage tank of independent sub-barrier type. The method of claim 1,
At the top of the main barrier, uppermost support mechanisms are installed in a row along the longitudinal direction of the B-type storage tank; On both sides of the main barrier, lateral support mechanisms are installed in a row along the height direction of the B-type storage tank; An independent sub-barrier type B-type storage tank, characterized in that a plurality of vertical support mechanisms are installed in a plurality of rows along the longitudinal direction of the B-type storage tank at the bottom of the main barrier. The method of claim 1,
An independent sub-barrier type B-type storage tank, characterized in that the distance between the sub-barrier and the main barrier is 950-1050mm, and the distance between the sub-barrier and the hull structure is 650-750mm. The method of claim 1,
An independent sub-barrier type B-type storage tank, characterized in that one layer of heat insulation layer (8) is adhered to the outer surface of the main barrier.

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