CN115468104A

CN115468104A - Split type liquefied natural gas tank saddle structure

Info

Publication number: CN115468104A
Application number: CN202211333395.8A
Authority: CN
Inventors: 陈晓晨; 黄鑫慧; 倪伟平; 匡岩; 黄信男; 韩斌
Original assignee: Shanghai Merchant Ship Design and Research Institute
Current assignee: Shanghai Merchant Ship Design and Research Institute
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2022-12-13

Abstract

The invention discloses a split type saddle structure of a liquefied natural gas tank, which comprises a floating stopping module for preventing a tank body from floating upwards and a supporting module for supporting the tank body; the tank body is arranged between the two bulkhead plates; the supporting module comprises a supporting base positioned below the tank body; the floating stopping module and the supporting module are not directly connected; the floating stopping module is positioned above the supporting module; the floating stopping module is fixedly arranged on the inner surface of the cabin wall plate, two ends of the supporting base are fixedly connected to the inner surfaces of the two cabin wall plates respectively, and reinforcing ribs for reinforcing the structure between the floating stopping module and the supporting module are fixedly arranged on the outer surface of the cabin wall plate. The overall saddle of the present invention has a smaller width than conventional solutions, is also lighter in weight, and can be used in spaces of limited width.

Description

Split type liquefied natural gas tank saddle structure

Technical Field

The invention relates to the technical field of ships, in particular to a split type saddle structure of a liquefied natural gas tank.

Background

When the ship adopts the C-type independent liquid tank to load Liquefied Natural Gas (LNG), the liquid tank needs to bear the low temperature of 163 degrees below zero, so the liquid tank can not be in direct contact with the ship body, and a corresponding saddle needs to be adopted. The gravity and vertical inertia force of the liquid tank and the loaded liquid cargo are supported by a fixed saddle and a sliding saddle which are connected with the ship body, and meanwhile, the longitudinal and transverse movement and the corresponding inertia force are supported by corresponding limiting devices. In addition, after the ship is damaged and enters water, the empty liquid tank can float upwards to cause the damage of the ship body, and a device special for limiting the floating of the liquid tank is further arranged, namely, a floating stopping function module is arranged. The whole saddle device has complex form and severe stress, and needs to be careful and careful in design.

The floating stop function module and the support function module of the traditional C-shaped tank saddle are integrated, so that the overall structure is very bulky, for example, the diameter of a tank body is 12.72 meters, the width of the saddle is 16.76 meters, and the saddle is 4 meters larger than the tank body. The conventional C-shaped tank saddle is bulky in overall structure, occupies a large amount of deck space, and is inconvenient to arrange in a limited width area.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a split type liquefied natural gas tank saddle structure.

The invention solves the technical problems through the following technical scheme:

a split type saddle structure of a liquefied natural gas tank comprises a floating stop module for preventing a tank body from floating upwards and a support module for supporting the tank body; the tank body is arranged between the two bulkhead plates; the supporting module comprises a supporting base positioned below the tank body; the floating stopping module and the supporting module are not directly connected; the floating stopping module is positioned above the supporting module; the floating stopping module is fixedly arranged on the inner surface of the cabin wall plate, two ends of the supporting base are fixedly connected to the inner surfaces of the two cabin wall plates respectively, and reinforcing ribs for reinforcing the structure between the floating stopping module and the supporting module are fixedly arranged on the outer surface of the cabin wall plate.

The floating stopping module comprises two blocking parts which are fixedly arranged on the inner surfaces of the two cabin wall plates respectively.

The reinforcing ribs are vertically distributed; the reinforcing ribs extend from the top position of the floating stopping module to the bottom position of the supporting base; the reinforcing ribs are plate-shaped; reinforcing ribs are arranged on the two cabin wall plates; the two reinforcing ribs are parallel to each other.

The floating stopping modules are connected with the bulkhead plate, the reinforcing ribs are connected with the bulkhead plate, and the supporting base is connected with the bulkhead plate in a welding mode.

The abutting area of the support base and the bulkhead plate is a first abutting area, and the welding seam between the reinforcing rib and the bulkhead plate does not exceed the range of the projection area of the first abutting area on the outer surface of the bulkhead plate.

The abutting area of the floating stopping module and the bulkhead plate is a second abutting area, and a welding seam between the reinforcing rib and the bulkhead plate does not exceed the range of the projection area of the second abutting area on the outer surface of the bulkhead plate.

The invention has the beneficial effects that: according to the invention, the floating stopping module and the supporting module are separately designed, and the floating stopping module, the supporting module, the cabin wall plate and the cabin wall structure are reinforced to be designed in a fusion manner, so that the transverse width space required by the saddle can be reduced, and compared with the conventional saddle design, the width can be reduced by 2 meters, thereby improving the space utilization rate and meeting the arrangement requirement of the liquefied natural gas C-shaped tank saddle in a narrow space. At the same time, the saddle can be reduced in weight due to its reduced width.

Drawings

FIG. 1 is a top view of the preferred embodiment of the present invention.

Fig. 2 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Detailed Description

The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.

As shown in fig. 1 and 2, a saddle structure for a split type lng tank includes a float stopping module 20 for stopping a floating of a tank 10 and a support module 30 for supporting the tank. The tank body is a C-shaped independent liquid tank.

The tank body 10 is arranged between two bulkhead plates 11; the support module 30 includes a support base 31 under the can body 10, and a support skid 32 disposed between the can body 10 and the support base 31.

The float stop module 20 and the support module 30 are not directly connected. The anti-floating module 20 is located above the support module 30.

The floating stopping module 20 is fixedly arranged on the inner surface of the bulkhead plate 11, two ends of the supporting base 31 are fixedly connected to the inner surfaces of the two bulkhead plates 11 respectively, and the outer surface of the bulkhead plate 11 is fixedly provided with a reinforcing rib 12 for reinforcing the structure between the floating stopping module and the supporting module.

The anti-floating module 20 comprises two blocking parts 21, and the two blocking parts 21 are respectively fixedly arranged on the inner surfaces of the two bulkhead plates.

The reinforcing ribs 12 are vertically distributed; the reinforcing ribs 12 extend from the top position of the floating stop module to the bottom position of the supporting base; the reinforcing ribs 12 are plate-shaped; the two cabin wall plates 11 are respectively provided with a reinforcing rib 12; the two ribs 12 are parallel to each other.

The floating stopping module 20 and the bulkhead plate 11, the reinforcing ribs 12 and the bulkhead plate 11, and the supporting base 31 and the bulkhead plate 11 are all connected by welding.

The abutting area of the support base 31 and the bulkhead plate 11 is a first abutting area, and the weld between the reinforcing ribs 12 and the bulkhead plate 11 does not exceed the range of the projection area of the first abutting area on the outer surface of the bulkhead plate.

The abutting area of the float stop module 20 and the bulkhead plate 11 is a second abutting area, and the weld between the reinforcing ribs 12 and the bulkhead plate 11 does not exceed the projection area of the second abutting area on the outer surface of the bulkhead plate.

Unlike the conventional integrated saddle structure, the floating stop module and the support module are designed separately.

The floating stopping module is arranged on the bulkhead plate, and the reinforcing ribs for reinforcing the structure are arranged on the reverse side of the bulkhead plate. The support module is also designed to be integrated with the bulkhead plate and bulkhead structural reinforcement. Through aforementioned structure, can reduce the required transverse width space of saddle, can reduce 2 meters with the width than conventional saddle design to improve space utilization, satisfy arranging of liquefied natural gas C type jar saddle in the narrow and small space. At the same time, the saddle can be reduced in weight due to its reduced width.

Compared with the conventional scheme, the split type liquefied natural gas tank saddle structure has the advantages that the width of the whole saddle is smaller, the weight is reduced to a certain extent, and the split type liquefied natural gas tank saddle structure can be used in a space with a limited width.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of this invention, and these changes and modifications are within the scope of this invention.

Claims

1. A split type saddle structure of a liquefied natural gas tank comprises a floating stop module for preventing a tank body from floating upwards and a support module for supporting the tank body; the tank body is arranged between the two bulkhead plates; the supporting module comprises a supporting base positioned below the tank body; the floating stopping device is characterized in that the floating stopping module and the supporting module are not directly connected; the floating stopping module is positioned above the supporting module; the floating stopping module is fixedly arranged on the inner surface of the cabin wall plate, two ends of the supporting base are fixedly connected to the inner surfaces of the two cabin wall plates respectively, and reinforcing ribs for reinforcing the structure between the floating stopping module and the supporting module are fixedly arranged on the outer surface of the cabin wall plate.

2. The split-type lng tank saddle structure of claim 1, wherein the float stopping module comprises two blocking members fixed to inner surfaces of the two bulkhead plates, respectively.

3. The split type lng tank saddle structure of claim 1, wherein the reinforcing ribs are vertically distributed.

4. The split lng tank saddle structure of claim 3, wherein the reinforcing ribs extend from a top position of the float stop module to a bottom position of the support base.

5. The split type lng tank saddle structure of claim 3, wherein the reinforcing rib has a plate shape.

6. The split lng tank saddle structure of claim 5, wherein the two bulkhead plates are each provided with a reinforcing rib.

7. The split lng tank saddle structure as set forth in claim 6, wherein the two reinforcing ribs are parallel to each other.

8. The split lng tank saddle structure as set forth in claim 1, wherein the floating stop blocks are welded to the bulkhead, the reinforcing ribs are welded to the bulkhead, and the support base is welded to the bulkhead.

9. The split lng tank saddle structure as set forth in claim 8, wherein the abutment areas of the support base and the bulkhead plate are first abutment areas, and the weld between the reinforcing rib and the bulkhead plate does not extend beyond the projection area of the first abutment areas on the outer surface of the bulkhead plate.

10. The split lng tank saddle structure according to claim 8, wherein the abutment area of the float stop module and the bulkhead plate is a second abutment area, and the weld between the reinforcing rib and the bulkhead plate does not exceed the projection area of the second abutment area on the outer surface of the bulkhead plate.