Abrasive material water jet flow spray head

Abstract

The invention provides an abrasive material water jet flow spray head. The abrasive material water jet flow spray head comprises a water inlet assembly and a material inlet assembly, wherein the water inlet assembly conveys high pressure water, and the material inlet assembly conveys abrasive materials. The water inlet assembly comprises a rotary water pipe and two or more water spray nozzles. The multiple water spray nozzles are arranged in the circumferential direction of the rotary water pipe, and the central lines of the water spray nozzles intersect. The material inlet assembly comprises abrasive material inlets arranged below the water spray nozzles. The central lines of the abrasive material inlets intersect with the intersection point of the water spray nozzles. The abrasive material water jet flow spray head has the beneficial effect that the requirement for crushing hard barriers and a large-area soil layer is met.

Description

technical field [0001] The invention relates to the field of jet nozzles, in particular to an abrasive water jet nozzle. Background technique [0002] During the tunneling process, the pure water jet can easily achieve different erosion depths by changing the water jet pressure and the moving speed of the nozzle, and the use of water jets to erode the soil layer can avoid dust and tool wear caused by mechanical blade scrapers , but when the pure water jet is dealing with the soil layer containing hard obstacles, the required pressure is too high, and it is difficult to break and remove when there are hard obstacles in the section. [0003] In order to solve the above problems, the existing method is to use abrasive water jets, that is, to add abrasive particles into the water jets to greatly improve the erosion, crushing and cutting capabilities of hard soil layers. However, for large-area cleaning and crushing occasions, since abrasives are added to the abrasive water jet,...

AI Technical Summary

Problems solved by technology

However, for large-area cleaning and crushing occasions, since abrasives are added to the abrasive water jet, the method of enlarging the action area of ​​the rotary joint with pure water jet will cause the abrasive to wear and stick inside the rotary joint. Therefore, the existing abrasive Water jet nozzles are usually set in a fixed and non-rotating manner, and a large-area spraying requirement is achieved by setting multiple spray holes on the nozzle or crossing multiple nozzles to form conical or fan-shaped jets, but there are gaps between the multiple jets in the above method , the jet cannot cover the entire section, so that the groove section will leave ridges when moving and scouring, so that the nozzle cannot continue to penetrate into the groove for erosion, which affects the crushing effect, and the cost of setting multiple nozzles is high

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