CN-121973895-A - Movable connection structure for low-temperature liquid cargo storage tank and low-temperature liquid cargo enclosure structure

CN121973895ACN 121973895 ACN121973895 ACN 121973895ACN-121973895-A

Abstract

The invention provides an active connection structure for a low-temperature liquid cargo storage tank and a low-temperature liquid cargo enclosure structure. The movable connecting structure for the low-temperature liquid cargo storage tank comprises a secondary insulation box and a primary insulation layer, and further comprises a movable connecting piece, wherein one end of the movable connecting piece is installed in a groove structure formed in the top of the secondary insulation box, the other end of the movable connecting piece extends into the primary insulation layer, the primary insulation layer is directly or indirectly connected with the other end of the movable connecting piece, one end of the movable connecting piece is provided with a movable space in the groove structure, and the other end of the movable connecting piece is provided with a degree of freedom in the horizontal direction. According to the invention, the movable connecting piece with the movable degree of freedom is used for connecting the secondary insulating box and the primary insulating layer, so that the movable connecting piece can move when being stressed, the shearing stress caused by hard connection of the primary insulating layer and the secondary insulating layer in the prior art can be effectively reduced, and the overall durability and safety of the low-temperature liquid cargo storage tank are improved.

Inventors

WEI YING
HE WEI

Assignees

中太能源科技(上海)有限公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. The movable connection structure for the low-temperature liquid cargo storage tank is characterized by comprising a secondary insulation box and a primary insulation layer; The secondary insulation box further comprises a movable connecting piece, one end of the movable connecting piece is installed in a groove structure formed in the top of the secondary insulation box, and the other end of the movable connecting piece extends into the primary insulation layer; The primary insulating layer is directly or indirectly connected with the other end of the movable connecting piece; One end of the movable connecting piece is provided with a movable space in the groove structure; the other end of the movable connecting piece has the freedom degree in the horizontal direction.
2. The swing link structure for a cryogenic liquid cargo tank defined in claim 1 wherein one end of the swing link is integrally or separately connected to the other end.
3. The swing link structure for a cryogenic liquid cargo tank defined in claim 1 further comprising a secondary shielding film mounted between said secondary insulation box and primary insulation, said swing link passing through the secondary shielding film, said swing link being unconnected to the secondary shielding film; A sleeve is arranged in the groove structure, one end of the movable connecting piece is positioned in the sleeve, and the secondary shielding film is in sealing connection with the sleeve.
4. The flexible connection structure for a cryogenic liquid cargo tank defined in claim 1, further comprising a secondary shielding film, wherein the flexible connection member passes through the secondary shielding film, and wherein a wing plate is provided on the flexible connection member, and wherein the wing plate is in sealing connection with the secondary shielding film.
5. The articulating mechanism for a cryogenic liquid cargo tank of claim 1 further comprising a secondary shielding film mounted between said secondary insulation and primary insulation; A sleeve is arranged in the groove structure, one end of the movable connecting piece is positioned in the sleeve, and the secondary shielding film is connected with the sleeve in a sealing way; The movable connecting piece is provided with a wing plate, and the wing plate is in sealing connection with the secondary shielding film.
6. The mobile connection structure for a cryogenic liquid cargo tank of claim 1, wherein said primary insulation layer comprises a first primary insulation tank and a second primary insulation tank, a gap between said first primary insulation tank and said second primary insulation tank being located above said secondary insulation tank; the other end of the movable connecting piece extends into a gap between the first primary insulation box and the second primary insulation box; the movable connecting structure further comprises a pressing plate; The pressing plate is in threaded connection with the movable connecting piece; The first primary insulation box and the second primary insulation box are connected with the movable connecting piece through pressing plates.
7. The swing link for a cryogenic liquid cargo tank as recited in claim 1 wherein said primary insulation includes a third primary insulation tank, The third primary insulation box is positioned right above the secondary insulation box; the third primary insulation box is connected with the secondary insulation box through a movable connecting piece; The movable connecting piece is positioned at the central positions of the secondary insulating box and the three primary insulating boxes.
8. The movable connection structure for a low-temperature liquid cargo tank according to claim 1, wherein one end of the movable connection member is provided with an arc surface, and the other end is a first rod part; the movable connecting structure further comprises a cover body, and one end of the movable connecting piece is limited in the groove structure by the cover body; The cambered surface is contacted with the cover body or the sleeve.
9. The cryogenic liquid cargo tank swing joint structure of claim 6, wherein the tank structure is a sliding tank, a sliding rail is arranged in the sliding tank, one end of the swing joint is a sliding block structure, the other end is a second rod portion, the sliding block structure is slidably mounted on the sliding rail, and a gap exists between the first primary insulation box and the second primary insulation box and between the first primary insulation box and the second rod portion.
10. A low temperature liquid cargo enclosure, characterized in that the movable connection structure for a low temperature liquid cargo storage tank according to claims 1-9 is adopted.

Description

Movable connection structure for low-temperature liquid cargo storage tank and low-temperature liquid cargo enclosure structure Technical Field The application relates to the field of low-temperature storage and transportation equipment, in particular to a movable connection structure for a low-temperature liquid cargo storage tank and a low-temperature liquid cargo enclosure structure. Background The prior marine LNG film maintenance system is mainly formed by sequentially arranging a main shielding layer, a main heat insulation layer (or called a main insulating layer), a secondary shielding layer and a secondary heat insulation layer (or called a secondary insulating layer), and the main heat insulation layer and the secondary heat insulation layer are required to be connected through connecting pieces (such as bolts) for the overall reliability of the film maintenance system. However, if the LNG liquid cargo is simply connected by a common bolt, the magnitude of the horizontal force applied to the main heat insulating layer and the sub heat insulating layer will be different from each other due to the sloshing of the LNG liquid cargo when the ship is running, so that the connection members having both ends connected to the main heat insulating layer and the sub heat insulating layer, respectively, will receive a large shearing stress at the boundary point between the main heat insulating layer and the sub heat insulating layer, and the shearing stress will break once exceeding the threshold value that the connection members themselves can carry. Therefore, there is a need for a connection structure that can connect the primary and secondary insulation layers and reduce the shear stress itself. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a movable connection structure for a low-temperature liquid cargo storage tank and a low-temperature liquid cargo enclosure structure. The invention provides a movable connection structure for a low-temperature liquid cargo storage tank, which comprises a secondary insulation box and a primary insulation layer; The secondary insulation box further comprises a movable connecting piece, one end of the movable connecting piece is installed in a groove structure formed in the top of the secondary insulation box, and the other end of the movable connecting piece extends into the primary insulation layer; The primary insulating layer is directly or indirectly connected with the other end of the movable connecting piece; One end of the movable connecting piece is provided with a movable space in the groove structure; the other end of the movable connecting piece has the freedom degree in the horizontal direction. Preferably, one end of the movable connecting piece is integrally or separately connected with the other end. Preferably, the secondary shielding film is arranged between the secondary insulation box and the primary insulation layer, the movable connecting piece penetrates through the secondary shielding film, and the movable connecting piece is not connected with the secondary shielding film; A sleeve is arranged in the groove structure, one end of the movable connecting piece is positioned in the sleeve, and the secondary shielding film is in sealing connection with the sleeve. Preferably, the shielding device further comprises a secondary shielding film, wherein the movable connecting piece penetrates through the secondary shielding film, a wing plate is arranged on the movable connecting piece, and the wing plate is in sealing connection with the secondary shielding film. Preferably, the secondary shielding film is arranged between the secondary insulation box and the primary insulation layer; A sleeve is arranged in the groove structure, one end of the movable connecting piece is positioned in the sleeve, and the secondary shielding film is connected with the sleeve in a sealing way; The movable connecting piece is provided with a wing plate, and the wing plate is in sealing connection with the secondary shielding film. Preferably, the primary insulating layer comprises a first primary insulating box and a second primary insulating box, wherein a gap between the first primary insulating box and the second primary insulating box is positioned above the secondary insulating box; the other end of the movable connecting piece extends into a gap between the first primary insulation box and the second primary insulation box; the movable connecting structure further comprises a pressing plate; The pressing plate is in threaded connection with the movable connecting piece; The first primary insulation box and the second primary insulation box are connected with the movable connecting piece through pressing plates. Preferably, the primary insulation includes a third primary insulation can, The third primary insulation box is positioned right above the secondary insulation box; the third primary insulation box is connected w