Abrasive automatic feeding device and using method

Abstract

The invention discloses an abrasive automatic feeding device for feeding abrasives through mixing abrasive water jet forward. The device is mainly composed of a hopper, a jet flow pump, a high-pressure abrasive tank, a valve seat installed on the upper part of the high-pressure abrasive tank and a mixing cavity installed on the lower part of the high-pressure abrasive tank; the valve seat is connected with a sand adding pipeline, a high-pressure water pipeline, a low-pressure water pipeline and a safety valve; and the mixing cavity is also connected with the high-pressure water pipeline, an abrasive pipeline and an abrasive water jet flow pipeline. Each flow inlet and each flow outlet as well as each functional component are connected through high-pressure pipelines which are internally provided with high-pressure ball valves, throttling valves and pneumatic ball valves for controlling the pipelines; the jet flow pump is arranged between a feeding pump and the sand adding pipeline; and through the negative pressure effect of the jet flow pump, the abrasive adding operation of the high-pressure abrasion tank is realized. Through the connection and disconnection combination of the high-pressure ball valves, throttling valves and pneumatic ball valves, the device can respectively achieve the three kinds of operations including pure water jet flow, automatic feeding and abrasive water jet flow, is simple in structure, is convenient to operate, is safe and reliable, and can be widely applied to a forward mixing abrasion water jet flow generation system.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and in particular relates to an abrasive supply device for adding abrasives to high-pressure water jets to form pre-mixed abrasive water jets. Background technique [0002] Abrasive water jet technology is a new technology developed in modern times, which is widely used in industrial cutting, rock excavation, surface cleaning and drilling. According to the different ways of adding abrasives, abrasive water jets are divided into pre-mixed abrasive water jets and post-mixed abrasive water jets. Since the post-mixed abrasive water jet cannot fully turbulently mix the abrasive with the high-speed flowing water, the energy transmission efficiency of the water medium to the abrasive is significantly reduced. Under the same energy consumption, the cutting depth of the post-mixed abrasive water jet It can only reach half of the cutting depth of the pre-mixed abrasive water jet, and in rock excavation, dri...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the difficulty of adding abrasives to the pre-mixed abrasive water jet, this invention develops a set of automatic abrasive supply device using the jet pump principle, which can not only suck abrasives quickly and efficiently, but also form a stable abrasive mixed jet, which is a good example for laboratory research. The effect of abrasive jets of different media and the structure optimization of the nozzle provide an experimental device to meet the actual needs of the project

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