Device for avoiding piping system vibration caused by vortex shedding

A pipe system and vortex technology, applied in the direction of pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of difficult modification of branch pipes, manufacturing and installation deviations, restrictions, etc.

Inactive Publication Date: 2020-12-01
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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Problems solved by technology

Part of the vibration can be considered in the design stage, but due to the existence of manufacturing and installation deviations, some vibrations cannot be completely resolved in the design stage
There are also many ways to eliminate vibration, but due to space and other factors, the methods to solve vibration problems are also limited
Acoustic resonance is a resonance phenomenon caused by fluid-induced vibration and acoustic frequency coupling. It often occurs in main pipes with branch pipes. It can be avoided by changing the size and length of branch pipes. However, due to the limitation of tee manufacturing or layout space, branch pipes may It is not easy to modify

Method used

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  • Device for avoiding piping system vibration caused by vortex shedding

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Embodiment Construction

[0007] For a clearer understanding of the present invention, the operation of avoiding the vibration of the piping system caused by vortex shedding is taken as an example below, combined with figure 1 The design of avoiding the vibration of the piping system caused by the vortex shedding of the present invention will be further described.

[0008] The design to avoid the vibration of the piping system caused by vortex shedding can be used in vibration occasions caused by the resonance of the fluid vortex shedding at the tee, such as electric power, chemical industry, military industry and other industries. The design mainly includes drainage pipes, pressurized parts, and valves. During the operation of the system, when the fluid 2 in the main pipeline 1 flows through the tee 4 of the main pipeline, a vortex shedding phenomenon occurs. If the frequency of the vortex shedding is the same as or close to the sound frequency in the branch pipeline 3, acoustic resonance will occur an...

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Abstract

The invention discloses a device for avoiding piping system vibration caused by vortex shedding, which is a cross-shaped insert (5) and is arranged at a main pipeline tee joint (4) close to the jointof a main pipeline (1) and a branch pipeline (3) in the branch pipeline (3). The vortex shedding frequency of the fluid at the tee joint is changed by adding the insert. The vortex shedding frequencyis decoupled from the sound frequency and the solid frequency, so that the sound resonance phenomenon is inhibited, the vibration of the pipeline system is reduced, the overlarge stress or fatigue ofthe pipeline caused by sound resonance is eliminated, and the safety of the pipeline system is improved.

Description

technical field [0001] The invention relates to the technical field of piping system vibration, in particular to the technical field of reducing the piping system vibration caused by vortex shedding. Background technique [0002] In electric power, chemical industry and military industry, etc., there is widespread vibration of fluid piping system, and the vibration itself is related to piping structure, fluid working conditions and operation mode. Part of the vibration can be considered in the design stage, but due to deviations in manufacturing and installation, some vibrations cannot be completely resolved in the design stage. There are also many ways to eliminate vibration, but due to the limitation of space and other factors, the methods to solve the vibration problem are also limited. Acoustic resonance is a resonance phenomenon caused by fluid-induced vibration and acoustic frequency coupling. It often occurs in main pipes with branch pipes. It can be avoided by chang...

Claims

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Application Information

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IPC IPC(8): F16L55/027F16L55/04
CPCF16L55/02781F16L55/041
Inventor 秦洁蔡坤邹建荣武心壮张玉蔡奕霖沈小要邱健施伟
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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