Ship-use low-temperature fluid loading and unloading device

Abstract

The invention relates to a ship-use low-temperature fluid loading and unloading device comprising a column, an inner arm, an outer arm, and an emergency release device. The column and the inner arm, the inner arm and the outer arm, and the outer arm and the emergency release device are connected by using rotation joints. The emergency release device comprises an upper ball valve, a lower ball valve, a hoop assembly connecting the two ball valves, and a power mechanism controlling the connection and disconnection of the two ball valves and realizing the emergency release of the ball valves. According to the invention, open-type nitrogen channels of the rotation joints are reasonably utilized, and water vapor in a nitrogen purging channel and an insulation chamber is discharged from a nitrogen outlet. Because accumulated water vapor is discharged in time by using the dry nitrogen gas, water vapor freezing in steel ball raceway is avoided, and the blockage of bearing ball rolling in the raceway is avoided. Therefore, the device can work normally in transporting of low-temperature media such as liquefied natural gas, low-temperature ethylene, and the like. With a main sealing device, a secondary sealing device, an end face sealing device I, an end face sealing device II, a nitrogen sealing device, and the like, good sealing property of the rotation joints is ensured.

Description

technical field [0001] The invention relates to a fluid loading and unloading equipment for transport between a cargo ship and a wharf, in particular to a marine cryogenic fluid loading and unloading equipment. Background technique [0002] The liquid medium is transferred between the shipping freighter and the wharf through the fluid loading and unloading arm, but the existing fluid loading and unloading arm cannot transport low-temperature fluid media such as liquefied natural gas (LNG, -162°) and low-temperature ethylene (-104°). The fluid handling arm is a key component on the dock, and the swivel joint and emergency release device are the key components of the fluid handling arm. Therefore, on the one hand, due to the low temperature of the low-temperature fluid medium, it is easy to freeze the water vapor in the steel ball raceway of the swivel joint and damage the raceway of the swivel joint; on the other hand, due to unpredictable reasons such as wind and waves, the ...

AI Technical Summary

Problems solved by technology

Therefore, on the one hand, due to the low temperature of the low-temperature fluid medium, it is easy to freeze the water vapor in the steel ball raceway of the swivel joint and damage the raceway of the swivel joint; on the other hand, due to unpredictable reasons such as wind and waves, the freighter will drift away from normal work Range, although the existing loading and unloading arm has a certain extension distance, when it exceeds this extension distance, a pulling phenomenon will occur. General pulling can damage the infusion equipment, cause the liquid to leak, cause marine pollution, and seriously make the fluid Loading arm collapsed, causing serious accident

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