Abrasive water jet cutting spray head device

Abstract

The invention discloses an abrasive water jet cutting spray head device. The center of a spray head body is provided with a through hole, one end of the spray head body is provided with a high-pressure water inlet, an abrasive blasting pipe is arranged in a central hole of the other end of the spray head body, and a spring chuck is arranged at the end of the installation section of the abrasive blasting pipe. A water jet nozzle is positioned in the high-pressure water inlet of the spray head body. An abrasive mixing cavity is formed in an inner hole of the spray head body between the water jet nozzle and the abrasive blasting pipe. The shell of the spray head body is provided with a return water outlet, and the return water outlet corresponds to an abrasive inlet. The included angle between the central line of the return water outlet and the central line of the spray head body is 15 to 30 degrees. The abrasive mixing cavity is formed in the inner hole of the spray head body between the water jet nozzle and the abrasive blasting pipe. By symmetrically and uniformly forming sand inlets and return water holes, the return water produced when the sand blasting pipe 6 is blocked is prevented from entering an abrasive supply valve, and the reliability and the machining efficiency in the cutting process are improved. The device is simple in structure, convenient to machine and easy to implement.

Description

technical field [0001] The invention relates to the field of abrasive water jet cutting, in particular to a water cutting head in an abrasive water jet cutting device. Background technique [0002] High-pressure abrasive water jet cutting technology is developed on the basis of pure water jet cutting technology. It entrains abrasives such as corundum and quartz sand through high-speed water jets, and forms a mixture with water jets in the abrasive mixing chamber. After acceleration, it is sprayed by the abrasive injection tube in the form of mixed flow to form a high-speed abrasive water jet. As we all know, water cutting equipment is widely used in the cutting of various soft and hard materials, and it is more and more widely used. When cutting hard materials such as metal, in order to improve the cutting efficiency, it is necessary to add abrasives such as garnet to the high-pressure water, so that the abrasives can quickly impact the surface of the material to be cut und...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the negative pressure at the sand inlet of the existing water cutting head and abrasive sand supply device will change due to the sand inlet, causing the water jet to deviate, causing damage to the inner wall of the sand nozzle and affecting cutting. Efficiency issues, easy backwater, difficult to clean, troublesome to use, etc.

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