Thin film type LNG ship pipeline system and low-temperature pipe limiting and fixing device thereof

Abstract

The invention discloses a thin film type LNG ship pipeline system low-temperature pipe limiting and fixing device which comprises a low-temperature pipe joint connected between two sections of low-temperature pipes, an elbow compound plate attached and fixed to the surface of the low-temperature pipe joint, a limiting pipe vertically arranged and fixed to the elbow compound plate, a connecting compound plate horizontally fixed to the top of the limiting pipe, and a spring hanging bracket fixedly connected with the connecting compound plate and a first ship body supporting structure. The limiting pipe is fixed to the second ship body supporting structure through a pipe clamp. The load of the LNG ship ultralow-temperature pipeline can be borne, displacement of the LNG ultralow-temperature pipeline is limited, vibration of the pipeline is controlled, and the space utilization rate of the cargo mechanical chamber is increased.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a membrane-type LNG ship piping system and a cryogenic pipe limiting and fixing device thereof. Background technique [0002] As one of the core systems of a membrane-type LNG carrier, the liquid cargo handling system needs to circulate LNG at a temperature as low as -163°C in its pipeline. Since the ship will face various working conditions during the process of transporting goods, the generated ultra-low temperature pipeline load will cause vibration and displacement of the low-temperature pipeline. In order to ensure the safety of the low-temperature pipeline of LNG carriers and reduce the risk of pipeline stress exceeding the standard, it is necessary to limit and fix the low-temperature pipeline. [0003] At present, in order to ensure a good view of the superstructure area, the space design of the cargo machinery room of the LNG ship is very narrow, so the layout of t...

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Problems solved by technology

[0003] At present, in order to ensure a good view of the superstructure area, the space design of the cargo machinery room of the LNG ship is very narrow, so the layout of the cryogenic pipelines in this space area is usually very compact, and it is currently impossible to install these cryogenic pipelines in narrow spaces such as elbows. The conventional limit device is arranged at the position, and the safety of the cryogenic pipeline cannot be guaranteed.

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