Flow mixer integrating post-mixing injection and self-oscillation

Abstract

The invention relates to a flow mixer integrating post-mixing injection and self-oscillation. The flow mixer comprises a high-pressure water nozzle, an abrasive inlet, a mixing oscillation cavity and a mixing nozzle. Water discharged from a high-pressure pump is accelerated through the high-pressure water nozzle and enters the oscillation cavity, negative pressure is formed in the cavity to allow abrasive to be sucked into the oscillation cavity from the abrasive inlet, the abrasive is sufficiently oscillated and mixed with high-pressure water and accelerated, the mixed and accelerated fluid is sprayed out through the mixing nozzle, and a high-pressure abrasive water jet is formed. The flow mixer has the advantages that the flow mixer is reasonable and compact in structure and convenient to use; the abrasive jet sprayed out by the post-mixing type abrasive nozzle can reduce the abrasion time of a conveying pipe wall and is low in linear loss, less prone to accumulation and capable of preventing pipeline blocking; the jet form using self-oscillation pulses allows the variable-pressure feature and cavitation effect to be enhanced, and work efficiency is increased greatly.

Description

technical field [0001] The invention relates to the technical field of self-excited oscillating pulse abrasive nozzles, is an abrasive nozzle integrating post-mixing and self-excited oscillating pulses, and belongs to the technical field of jet flow. Background technique [0002] Abrasive jet refers to the liquid-solid two-phase medium jet formed by mixing abrasives with high-speed flowing water or high-pressure water. It is currently the most widely used abrasive jet; and the abrasive nozzle is the key to forming the abrasive jet. Abrasive nozzle The mixing method is divided into two types: pre-mixing and post-mixing; the abrasive jet ejected from the front-mixing abrasive nozzle has a long abrasive time on the transport pipe wall, the loss of the jet is large along the way, and the abrasive is easy to accumulate in the front mixing chamber. , will cause pipeline blockage; and the water and abrasive in the mixing chamber of the post-mixing abrasive nozzle cannot be fully mi...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a flow mixer that integrates post-mixing injection type and self-excited oscillation pulse. The flow mixer overcomes the shortcomings of the above-mentioned prior art. It takes a long time to corrode the transport pipe wall, the loss of the jet flow is large, and the abrasive is easy to accumulate in the front mixing chamber, causing pipeline blockage and other problems; it can also solve the mixing and acceleration problems of the post-mixing abrasive and water; it can also solve the problem of variable pressure Problems with poor characteristics and cavitation and low work efficiency

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