Shock absorption and noise reduction curved pipe pressure balancing type expansion joint

Abstract

Provided is a shock absorption and noise reduction curved pipe pressure balancing type expansion joint. According to the technical scheme, the shock absorption and noise reduction curved pipe pressure balancing type expansion joint comprises a curved pipe, a first work corrugated pipe and a second work corrugated pipe are arranged at a flow conveying end of the curved pipe, and a balanced corrugated pipe is arranged at a blind end of the curved pipe. The shock absorption and noise reduction curved pipe pressure balancing type expansion joint is characterized in that a shield plate is arranged at a curved portion of the curved pipe, a flowing gap H is arranged between the lower portion of the shield plate and the curved pipe, a pipe wall of the curved portion of the curved pipe is provided with a set of balance holes, and the shield plate shields the balance holes. In the process of use, when media in a pipeline flow through the curved pipe of the curved pipe pressure balancing type expansion joint, the media are buffered by the shield plate firstly, then the media flow through the balance holes of a porous structure from a through-flow gap on the lower portion of the shield plate, impact on the blind plate is changed into multiple-hole diffused impact after buffering from direct impact on one balance hole, therefore, acting force on the blind plate is reduced greatly, meanwhile, shield of natural shock frequency of a pipe section is achieved, and system shock and noise caused by medium turbulence and pipe section system pressure sudden change are reduced.

Description

technical field [0001] The invention relates to an expansion joint, in particular to a shock-absorbing and noise-reducing curved pipe pressure-balanced expansion joint, which belongs to the technical field of pipe fittings. Background technique [0002] In industrial process pipelines, the pipelines are intricate, and the physical variables of the pipelines caused by pressure, temperature, medium, vibration, installation misalignment, etc. are often solved by using metal expansion joints with different structural compensation types as piping technical devices. At the inflection point of the curved pipe line, that is, the L-shaped pipe, the pressure-balanced expansion joint of the curved pipe is usually used as the compensation device for the pipe section. The curved pipe pressure balance expansion joint is mainly used to absorb the combined axial and lateral displacement and to balance the pressure thrust of the bellows. The curved pipe pressure balanced expansion joint has...

AI Technical Summary

Problems solved by technology

In the actual operation process, it is found that because the working pressure of the pipeline often produces a sudden drop in pressure, the instantaneous pressure fluctuation causes the flow velocity of the medium to lose balance, resulting in turbulent flow, vibration and noise in the system

The fluctuation of the medium directly acts on the blind plate of the pressure-balanced expansion joint of the curved pipe after passing through the single balance hole, which brings technical difficulties to the balance of the curved pipe, causing severe vibration and excessive noise during the operation of the expansion joint, and causing safety hazards to the operation of the pipeline system

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