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Rotating joint special for ultra-low temperature fluid loading arm

A technology of fluid loading and unloading arms and rotary joints, which is used in fluid handling, equipment loaded into pressure vessels, and installation devices for container structures, etc. , to achieve the effect of increasing nitrogen flow and good sealing performance

Active Publication Date: 2016-05-04
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultra-low temperature transportation of liquefied natural gas and low-temperature ethylene will not only affect the life of the inner ring of the rotary joint, but also cause the water vapor accumulated in the rotary joint to freeze due to the low temperature, which will damage the inner raceway of the joint and cause serious consequences

Method used

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  • Rotating joint special for ultra-low temperature fluid loading arm

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] As shown in the figure, a special rotary joint for loading and unloading arms of ultra-low temperature fluids includes a left flange 2, a right flange 16, an inner ring 8 and an outer ring 12, the left flange 2 is fixedly connected to the inner ring 8, and the right flange 16 is connected to the inner ring 8. The outer ring 12 is fixedly connected.

[0020] The inner ring 8 is provided with a heat-insulating cavity 11, the main static seal ring 1 and the active seal ring 18 are respectively installed between the inner ring 8 and the left and right flanges, and the outer wall of the inner ring 8 and the inner wall of the outer ring 12 are provided with Nitrogen purge passage 9 is provided with two annular raceways on the nitrogen purge passage 9, and a ball valve 10 that can rotate the inner and outer rings independently around the outer wall of the inner ring is...

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Abstract

Disclosed is a rotating joint special for an ultra-low temperature fluid loading arm. An inner ring is sleeved with an outer ring. A left flange is connected with the left end of the inner ring. A right flange is fixedly connected with the outer ring. A thermal insulating cavity is formed in the inner ring. A nitrogen purging channel is arranged between the inner ring and the outer ring and provided with an annular roller path. A ball valve capable of enabling the inner ring and the outer ring to rotate independently is mounted in the annular roller path. The left flange is provided with a left nitrogen channel, the inner ring is provided with an inner nitrogen channel, the left flange is provided with a nitrogen inlet, and the inner ring is provided with two nitrogen via holes. The right flange and the outer ring are provided with a right nitrogen channel, the right flange is provided with a nitrogen outlet, and the outer ring is also provided with nitrogen via holes. An open type nitrogen channel is formed by the nitrogen inlet, the left nitrogen channel, the nitrogen via holes of the inner ring, the thermal insulating cavity, the nitrogen purging channel, the nitrogen via holes of the outer ring, the right nitrogen channel and the nitrogen outlet sequentially. By means of the rotating joint, the inner ring and the outer ring can rotate independently, so that the nitrogen circulation is improved and moisture is easy to bring out and discharge into the atmosphere.

Description

technical field [0001] The invention relates to a key component of ultra-low temperature liquid transport equipment, in particular to a special rotary joint for unloading arms of liquefied gas at ultra-low temperature, and belongs to the technical field of ultra-low temperature liquefied gas transport. Background technique [0002] At present, the transportation of liquefied gas between the shipping freighter and the wharf is often completed through the fluid loading and unloading arm, and the rotary joint of the loading and unloading arm is the "heart" of the entire loading and unloading arm. It is not only the flow channel of the liquid medium, but also the loading and unloading arm. An important structural component that realizes all-round connection in space, the quality of the rotary joint directly determines the value and service life of the entire loading arm. The ultra-low temperature transportation of liquefied natural gas and low-temperature ethylene will not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C5/02F17C7/02F17C13/10F17C13/04
CPCF17C5/02F17C7/02F17C13/04F17C13/10F17C2205/0302F17C2205/0323F17C2221/014F17C2260/032
Inventor 缪宏严宇张燕军郑再象张瑞宏张剑峰金亦富
Owner YANGZHOU UNIV
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