Injection mixing pump

Abstract

The invention relates to a mixed flow injection device, in particular to an injection mixing pump. The injection mixing pump is concentrically provided with an inner ring injector, an outer ring ejector and an overall mixing output pipe along a central axis; the inner ring injector is fixedly arranged in the outer ring ejector; the inner ring injector is sequentially provided with a central main fluid inlet pipe, a central nozzle, a central mixing chamber and a center mixing pipe along the central axis, wherein the central main fluid inlet pipe is arranged at the inlet end of the inner ring injector; the periphery of the central mixing chamber is communicated with an inlet of a first fluid; the outer ring ejector is sequentially provided with a main fluid ring cavity, an outer ring nozzle, a ring mixing chamber and a ring mixing pipe along the central axis; the periphery of the ring mixing chamber is communicated with a second fluid; and the outlet end of the inner ring injector and a flat straight-through overall mixing output pipe at the outlet end of the outer ring ejector form an outlet injection mixer. The injection mixing pump provided by the invention is light in weight, has small axial dimension and high injection rate, shows good performance in large flow and can obtain high output pressure.

Description

technical field [0001] The invention relates to a mixed flow injection device, in particular to an injection mixing pump for mixed fluid injection. Background technique [0002] The jet mixing pump is also called jet pump, which is a device that injects low pressure (or no pressure) secondary fluid with high pressure primary fluid, and completes primary fluid suction secondary fluid for medium pressure mixed flow delivery. Since the jet mixing pump has no moving parts, it is reliable and widely used in fluid equipment in various fields. [0003] The existing typical Venturi injector is actually a jet mixing pump, which consists of a main fluid inlet pipe, a nozzle, a secondary fluid inlet, a mixing chamber, a throat or a mixing diffuser. The secondary fluid passed into the mixing chamber is sucked into the mixing tube by the jet of the primary fluid nozzle, and the primary and secondary fluid is output from the mixing diffuser tube after being mixed and equalized. Such inj...

AI Technical Summary

Problems solved by technology

[0007] The existing jet mixing pump mainly relies on the turbulent diffusion of the jet in the long stroke of the mixing tube to mix the primary fluid and the secondary fluid; the turbulent diffusion of the jet requires a process of development and strengthening in the mixing tube , so the injector must have a slender mixing tube (or mixing diffuser tube), and a large-flow injector needs a large-diameter mixing tube. Disadvantages of large size and excessive weight

This is very unfavorable for installation and use in many occasions that require small volume and light load

[0008] Although a large jet pump can be formed by connecting multiple small jets in parallel or using annular slit nozzles, their function is mainly for pumping, and their structures are also relatively special. Not applicable

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