Axial stretchable stepped combined type Venturi mixer

Abstract

The invention relates to an axial stretchable stepped combined type Venturi mixer. The axial stretchable stepped combined type Venturi mixer comprises a main fluid inflow circular pipe, a main fluid gradual contracting section first-level circuit pipe, a main fluid gradual contracting section second-level circuit pipe, a main fluid gradual contracting section third-level circuit pipe, connecting pipes, a sleeve, a main fluid gradual expanding section first-level circuit pipe, a main fluid gradual expanding section second-level circuit pipe, a main fluid gradual expanding section third-level circuit pipe, a main fluid outflow circular pipe, and an introduction pipeline for introducing fluid inflow and arranged on the connecting pipes which are communicated with one another in turn, wherein multi-level circular pipes for the gradual contracting section and the gradual expanding section are nested with one another; contracting sections and expanding sections, which are stretchable, of Venturi pipes are formed on the two sides of the multi-level circular pipes; the circular pipes at the two ends on the outer side of the gradual contracting section and the gradual expanding section can be served as the stretchable main fluid inflow pipelines and the stretchable main fluid outflow pipelines; the connecting pipes on the two sides are connected with each other through the sleeve, so that a stretchable throat of the Venturi mixer is formed. The axial stretchable stepped combined type Venturi mixer can select optimal structure parameters of the Venturi mixer according to the flow ratio of the introduced fluid and the main fluid, is capable of increasing the mixing efficiency and is applicable to relatively wide working conditions.

Description

technical field [0001] The invention relates to a Venturi mixer, in particular to an axially expandable stepped combined Venturi mixer. Background technique [0002] Venturi mixer is a gas-liquid or liquid-liquid mixing device widely used in engineering practice. A common Venturi mixer is a classic Venturi tube with an opening in the throat. The mainstream fluid flows through the inflow pipe, and the tapered section enters the throat. The turbulent flow formed by a high-speed fluid achieves the purpose of mixing, and then the fluid flows out through the diverging section and the outflow pipe. The existing Venturi mixer is composed of pipes with fixed size and shape, which cannot be adjusted in size according to the flow ratio of the mainstream fluid and the incoming fluid, resulting in low fluid mixing efficiency. In addition, when the fluid flows through the classical Venturi mixer, due to the existence of the boundary layer, the fluid disturbance near the wall is small, ...

AI Technical Summary

Problems solved by technology

Existing Venturi mixers are composed of pipes of fixed size and shape, which cannot be adjusted in size according to the flow ratio of the mainstream fluid and the incoming fluid, resulting in low fluid mixing efficiency

In addition, when the fluid flows through the classic Venturi mixer, due to the existence of the boundary layer, the fluid disturbance near the wall is small, which is easy to cause the problem of uneven mixing

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