Single-stage porous throttling orifice plate and throttling device

Abstract

The invention discloses a single-stage porous throttling orifice plate and a throttling device and solves the problems of loud noise and pipeline vibration of the throttling orifice plate in the prior art. The beneficial effects of reducing pipeline noise and vibration and conveniently manufacturing on site can be achieved. The specific scheme is as follows: the single-stage porous throttling orifice plate comprises a plate body, wherein the plate body has set thickness; the size of the plate body is matched with the size of a pipeline; the plate body is provided with at least two throttling holes; a plurality of throttling holes are annularly distributed by taking the central axis of the plate body as the center; or one of the plurality of throttling holes is formed in the center of the plate body.

Description

technical field [0001] The invention relates to the field of thermal power plants, in particular to a single-stage multi-hole throttling orifice plate and a throttling device. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Throttle orifice plates are often used as decompression components in steam and water pipelines in thermal power plants. In the typical design manual for steam and water pipeline parts and components in thermal power plants, it can be found that the finished orifice plates have multi-stage orifice plates and single-stage orifice plates. Orifice plate: In the actual design of steam-water pipelines in thermal power plants, a single-stage throttle orifice can be made on site, that is, a round hole is drilled in the center of the steel plate to be used as a single-stage throttle orifice. The above several throttling orific...

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Problems solved by technology

[0004] The throttling orifice is mainly used to decompress the medium in the pipeline. When designing only a single-hole orifice, the inventor found that when the flow aperture of the throttling orifice is selected to be small, the flow area of ​​the throttling orifice will be larger than the design. When the system is put into operation, the flow field of the medium before and after the throttle orifice is likely to change drastically, resulting in loud noise and vibration problems in the pipeline

[0005] In addition, the site often encounters the need to adjust the flow area of ​​the throttle orifice. When procurement is difficult, it is necessary to process and manufacture a new throttle orifice on site. Although the throttle orifice made on site is more throttle than the finished product The orifice plate can also play a throttling effect, but the inventor found that the throttling aperture of the throttling orifice plate made on site may not be able to adapt to the throttling effect

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