Venturi mixer with adjustable shrinkage hole on throat

Abstract

The invention discloses a venturi mixer with an adjustable shrinkage hole on the throat. The venturi mixer comprises a mainstream venturi tube inflow pipeline, a mainstream venturi tube reducing section, a mainstream venturi tube throat, a mainstream venturi tube diffusion section and a mainstream venturi tube outflow pipeline, wherein an opening through which fluid is introduced to flow in is formed in a side face of the mainstream venturi tube throat. The venturi mixer also comprises multiple shrinkage holes formed in the downstream of the opening in the mainstream venturi tube throat and a matched shrinkage hole adjusting device, wherein the shrinkage holes consist of two semicircular core plates; the core plates can be designed into different thicknesses according to the needs; multiple through holes are formed in each core plate; the two core plates in the same shrinkage hole reciprocate inwards and outwards in the throat through an adjusting rod, so that a flow area of the mixed liquid at the shrinkage holes is changed; the shapes and sizes of three shrinkage holes are completely the same; during installation, a staggered mounting angle of 30 degrees is formed between the second shrinkage hole and the first shrinkage hole. By adopting the venturi mixer, disturbance of the mixed fluid in the venturi mixer can be effectively enhanced, the mixing efficiency of the venturi mixer is effectively improved, and a phenomenon that the mixing is non-uniform is avoided.

Description

technical field [0001] The invention relates to a Venturi mixer, in particular to a Venturi mixer with an adjustable shrinkage cavity in the throat. Background technique [0002] As an important gas-liquid or liquid-liquid mixing device, the Venturi mixer is widely used in engineering practice. A common Venturi mixer is a classic Venturi tube with a throat opening. The mainstream fluid flows through the classic Venturi tube, and the incoming fluid flows in through the throat opening of the Venturi tube. The fluid is turbulently mixed. [0003] In the Venturi structure, since the throat area is the area with the smallest cross-sectional area of ​​the Venturi mixer, when the mixed liquid flows through the throat, the average velocity of the mixed liquid is the largest here, but due to the existence of the boundary layer, resulting in The fluid movement near the wall is slow, and the disturbance intensity of the mixed fluid is small, which easily causes problems such as uneve...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a venturi mixer with an adjustable shrinkage cavity in the throat, which can enhance fluid disturbance at the edge and center of the fluid in the throat of the Venturi mixer, effectively Avoid uneven mixing, improve the mixing efficiency of the Venturi mixer, and make the Venturi mixer suitable for a wider range of flow ratios between the incoming fluid and the mainstream fluid

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