Condensation pipeline vibration damper and vibration damping method

Abstract

The invention discloses a shock absorber of a condensation pipeline. The shock absorber of the condensation pipeline comprises a main liquid flow inlet, wherein the main liquid flow inlet is communicated with a branch pipe through which a two-phase flow passes, and the branch pipe is perpendicular to the direction of the main liquid flow inlet. The shock absorber of the condensation pipeline comprises an inner cavity and an outer cavity, wherein the inner cavity is communicated with the main liquid flow inlet, the outer cavity is communicated with the branch pipe, the inner cavity is sleeved with the outer cavity, the position, communicated with the outer cavity, of the inner cavity is provided with a gap, and the inner wall of the outer cavity is provided with a threaded groove structure. The threaded groove structure is utilized for enhancing heat transferring and accelerating condensation, and therefore pressure pulsation caused by vapor condensation is reduced to be the minimum; condensed fluid flows back into the inner cavity, original pressure fluctuation is changed again when the condensed fluid passes through a tapered opening, and dual shock absorption is achieved. The shock absorber can be applicable to the condensation pipeline where gas and liquid exist at the same time, and the shock absorption effect is good.

Description

technical field [0001] The invention relates to the field of pipeline vibration reduction, in particular to a condensation pipeline vibration damper. Background technique [0002] Pipelines are widely used in production equipment in petroleum, chemical, power station and other industries. Under the action of a certain pressure and velocity of the fluid, hydrodynamic pressure will be generated on the walls of these pipes. The unsteady pipe flow will cause the vibration of the pipe. For example, due to the intermittent suction and displacement of the reciprocating pump and the closing of the valve, the parameters such as the pressure, velocity, and density of the pipe flow will change periodically with time and position. The resulting phenomenon is called "pipe flow pulsation". Pipe flow pulsation is the main cause of pipeline vibration. This pulsation is divided into air flow and liquid flow, which vary according to the transport medium. Whether it is air flow or liquid f...

AI Technical Summary

Problems solved by technology

[0006] 1) The volume of the shock absorber is large; such as buffer tanks, accumulators, etc., the large volume not only brings great difficulties to installation and construction, but also occupies a large installation space

[0007] 2) There is no easy way to adjust the resonance frequency of the shock absorber to ensure its damping effect of fluid pulsation

Because of changes in working conditions, it is possible to change the fluid pulsation frequency, thereby affecting the attenuation effect

[0008] 3) It is difficult to select parameters. For example, for buffer tanks and accumulators, the most important thing is the working volume and pre-charge pressure. The determination of these parameters often needs to be determined through repeated experiments, which is difficult to popularize and apply

[0009] 4) The attenuation performance is low, and the attenuation effect is not ideal

[0010] According to relevant literature and reports at home and abroad, there are relatively many shock absorbers developed for gas pipeline vibration and liquid pipeline vibration, but for pipeline vibration with phase change, no relevant shock absorbers have been reported.

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