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Swivel joint for entrucking low-temperature LNG (liquefied natural gas)

A rotary joint, low temperature technology, applied in the direction of pipe/pipe joint/pipe fitting, adjustable connection, passing element, etc., can solve the problem of nitrogen pipeline damage, etc., and achieve the effect of avoiding damage

Inactive Publication Date: 2013-02-13
JIANGSU CHANGLONG PETROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pipeline is arranged relatively outside, and it is easy to collide with the nitrogen purge pipeline when the inner and outer arms of the crane tube rotate, causing damage to the nitrogen pipeline

Method used

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  • Swivel joint for entrucking low-temperature LNG (liquefied natural gas)
  • Swivel joint for entrucking low-temperature LNG (liquefied natural gas)

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Embodiment Construction

[0010] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0011] Such as figure 2 As shown, the rotary joint for low-temperature LNG loading of the present invention includes a left flange 10 and a right flange 1, the left flange 10 and the inner ring 7 are connected by screws to form a left rotating part, and the right flange 1 and the outer ring 5. Connect with screws to form a right-rotating component, and the left-rotating component and the right-rotating component can rotate relative to each other. Between the inner ring 7 and the outer ring 5 there are steel balls 6 covering a circle.

[0012] The left flange 10 is provided with a nitrogen inlet or nitrogen outlet, and a nitrogen channel is provided between the left flange 10, the inner ring 7, the outer ring 5 and the right flange 1, and the right flange 1 is provided with a corresponding nitrogen outlet or nitrogen outlet. The inlet, the n...

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Abstract

The invention discloses a swivel joint for entrucking low-temperature LNG (liquefied natural gas), which comprises a left flange and a right flange, wherein the left flange is connected with an inner ring to form a left rotating member; the right flange is connected with an outer ring to form a right rotating member; the left rotating member and the right rotating member can relatively rotate; a nitrogen inlet or a nitrogen outlet is arranged at the left flange place; a nitrogen channel is arranged among the left flange, the inner ring, the outer ring and the right flange; a nitrogen outlet or a nitrogen inlet is correspondingly arranged at the right flange place; and the nitrogen inlet and the nitrogen outlet are axially arranged. The left flange and the inner ring are connected to be the left rotating member through a screw; and the right flange and the outer ring are connected to be the right rotating member through a screw. By modifying the nitrogen purging route, and axially arranging the nitrogen inlet and the nitrogen outlet, the pipelines are more close to the LNG pipeline; the nitrogen pipelines are always located at the inner side, not easy to collide so as to avoid the damage when being operated.

Description

technical field [0001] The invention relates to a low-temperature LNG loading rotary joint used in the fluid loading and unloading process in the petrochemical industry. Background technique [0002] Cryogenic crane tube is an industrial product that has only been developed in China in recent years, and is mainly used for loading and unloading cryogenic fluids in the petrochemical industry. The core component of its technology is a rotary joint. Currently, mainstream products in the domestic market such as figure 1 As shown, its main structural components are left flange, right flange, inner ring, outer ring and seals. The rationality of the structure of the rotary joint and the excellent design dimensions determine the sealing performance and operational performance of the rotary joint. Since the rotary joint works at ultra-low temperature, in order to ensure that the gap between the raceways does not freeze, it is necessary to maintain the flow of nitrogen gas. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L27/08
Inventor 冯是公
Owner JIANGSU CHANGLONG PETROCHEM EQUIP
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