Abrasive concentration control system for front mixed abrasive water jet equipment

Abstract

The invention discloses an abrasive concentration control system for front mixed abrasive water jet equipment. The system comprises a bypass proportional flow valve, a main way proportional flow valve, a high-pressure water pump, a control module, a high-pressure tank, a ball valve, an ultrasonic concentration detector and a nozzle. Water supply of the high-pressure tank is controlled by the bypass proportional flow valve; water supply of the nozzle is controlled by the main way proportional flow valve; a concentration value of a mixed abrasive is detected through the ultrasonic concentration detector, and is returned to a control module; and the control module performs contrastive analysis for the concentration value and a set value, sends signals to the bypass proportional flow valve and the main way proportional flow valve to adjust the openness, and adjusts the water supply quantity ratio of the bypass proportional flow valve and the main way proportional flow valve to finish closed-loop control of abrasive concentration. The system realizes high-precision control of the abrasive concentration of a front mixed abrasive jet cutting system, improves the abrasive utilization rate and the cutting efficiency, and fills the blank of traditional technology.

Description

technical field [0001] The invention relates to the field of abrasive water jet cutting, in particular to an abrasive concentration control system for pre-mixing abrasive water jet equipment. Background technique [0002] Abrasive water jet cutting is characterized by a type of high-pressure jet formed by mixing very hard solid particles such as quartz sand, corundum, garnet, ceramsite, etc. into pure water jet. The cutting principle is that the abrasive is accelerated through the nozzle and then impacts the surface of the object to be cut, and the cutting is realized by the erosion effect of the abrasive particles on the material. Under the same pressure conditions, the cutting ability of abrasive jet is much higher than that of pure water jet. [0003] Abrasive water jets are generally divided into two types: pre-mix and post-mix. The post-mixing abrasive jet is under the action of the driving force pressure, the water medium passes through the first nozzle to form a hig...

AI Technical Summary

Problems solved by technology

In the process of abrasive water jet cutting, as the cutting progresses, the abrasive will be gradually consumed, and the reduction of abrasive concentration will directly lead to the decline of cutting quality, insufficient use of abrasive, and the cutting efficiency will be greatly reduced

However, the pre-abrasive mixing device in the prior art adjusts the abrasive concentration by manually adjusting the proportion of the water supply in the high-pressure tank and the high-pressure water pipe, which cannot ensure continuous abrasive supply, and the abrasive concentration value cannot be kept constant, and manual operation is required. Can't do precise adjustment

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