A piston type high pressure expansion joint

A piston type, expansion joint technology, applied in the direction of adjustable connection, through components, expansion compensation devices for pipelines, etc., can solve problems such as small pressure bearing capacity, inability to withstand high pressure, and diameter restrictions

Active Publication Date: 2022-02-11
中国人民解放军军事科学院国防工程研究院工程防护研究所
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  • Abstract
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Problems solved by technology

[0002] The expansion joint is set in the middle of the high-pressure pipeline, which can compensate the deformation caused by thermal expansion and contraction in the length direction of the pipeline and maintain the sealing of the pipeline. It is also used for length compensation of the pipeline due to installation and adjustment; existing pressure pipeline connection Bellows expansion joints are mainly used, and the larger the nominal diameter, the smaller the pressure bearing capacity; with the development of pipelines in the direction of large diameter and high pressure resistance, bellows expansion joints have exposed defects that cannot withstand high pressure and are limited by diameter. It is necessary to develop more advanced devices to meet the limited working environment of the existing bellows expansion joints

Method used

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  • A piston type high pressure expansion joint
  • A piston type high pressure expansion joint

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Embodiment Construction

[0018] The invention is described with reference to the drawings and specific embodiments.

[0019] Such as Figure 1-2 As shown, a piston-type high-pressure expansion joint mainly includes a piston outer casing 1, a piston inner body 2, 3 double-acting oil cylinders 3, a limit stop flange 4, a key-type combined flange 5, a key 6, Sliding support ring 7 and high pressure seal 8. The piston outer casing 1 includes two sections of the upstream casing flange and the downstream casing; the piston inner body 2 is assembled inside the piston outer casing 1; the stop flange 4 is connected to the piston The downstream end of the outer casing 1; the keyed combination flange 5 is assembled on the outside of the piston inner body 2 and is located downstream of the limit stop flange 4; the keyed combined flange 5 is blocked by the keyed upstream The ring 5-1 is composed of the downstream flange 5-2 of the card key. During installation, the upstream retaining ring 5-1 of the card key is ...

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Abstract

The invention belongs to the field of high-pressure pipeline connection, and in particular relates to a piston-type high-pressure expansion joint. A piston-type high-pressure expansion joint mainly includes a piston outer casing, a piston inner pipe body, a plurality of two-way acting oil cylinders, a limit stop flange, a snap-key combination flange, snap-keys, a sliding support ring and a high-pressure seal. The snap-key combined flange is fixedly connected to the inner pipe body of the piston; the pistons of the two-way acting oil cylinder are all fixedly connected to the piston outer sleeve; The invention adopts a double-acting oil cylinder, and the relative movement between the outer sleeve of the piston and the inner tube of the piston, which can realize the active adjustment and passive adjustment in the length direction of the high-pressure pipeline, and has the advantages of large diameter, high overpressure, large expansion and contraction, quick disassembly and assembly, and long Advantages such as longevity.

Description

technical field [0001] The invention belongs to the technical field of high-pressure pipeline connection, and in particular relates to a piston-type high-pressure expansion joint. Background technique [0002] The expansion joint is set in the middle of the high-pressure pipeline, which can compensate the deformation caused by thermal expansion and contraction in the length direction of the pipeline and maintain the tightness of the pipeline. It is also used for length compensation of the pipeline due to installation and adjustment; existing pressure pipeline connection Bellows expansion joints are mainly used. The larger the nominal diameter, the smaller the pressure bearing capacity; with the development of pipelines to large diameters and high pressure resistance, bellows expansion joints have exposed defects that cannot withstand high pressure and are limited by diameter. It is necessary to develop more advanced devices to meet the limited working environment of the exis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L51/00F16L27/12
CPCF16L51/00F16L27/12
Inventor 任辉启王世合黄魁汪剑辉吴飚刘国强周松柏郭良王幸赵强
Owner 中国人民解放军军事科学院国防工程研究院工程防护研究所
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