Device for weakening piping system vibration caused by vortex shedding

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

Inactive Publication Date: 2021-01-22
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 weakening 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 the invention to weaken the vibration of the piping system caused by vortex shedding will be further described.

[0008] The design for weakening 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 sound 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 pipe 1 flows through the tee 4 of the main pipe, 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 pipe 3, acoustic resonance will occur, which will intens...

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Abstract

The invention discloses a device for weakening piping system vibration caused by vortex shedding. The device is a surfacing (5), and the surfacing (5) is welded to the position, close to the joint ofa main pipeline (1) and a branch pipeline (3), on a main pipeline tee joint (4) in the main pipeline (1). According to the design, surfacing is carried out on the upstream of the main pipeline tee joint, the flow direction of local fluid in the pipeline is changed through surfacing, so that vortexes formed by the fluid in the main pipeline tee joint are weakened, vortex fluctuation is restrained from being amplified in the branch pipeline due to audio frequency coupling, and vibration of a piping system is reduced. The design starts from weakening vortexes at the tee joint, suppresses the acoustic resonance phenomenon, reduces piping system vibration, eliminates overlarge stress or fatigue of the pipeline due to acoustic resonance, and improves the safety of the piping system.

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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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/02F16L55/04
CPCF16L55/02F16L55/041
Inventor 蔡坤武心壮秦洁邹建荣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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