A front-mixing abrasive jet external injection instrument protection device

Abstract

The invention discloses a pre-mixed abrasive jet flow externally-arranged jetting instrument protection device. The device comprises a moving shelter and protection device and a frame body. The moving shelter and protection device is mounted in the frame body. The moving shelter and protection device comprises an inner moving device and an outer moving device. The inner moving device is mounted at the inner side of the outer moving device and comprises an inner upper ring, a movable one-third arc transparent plate, a side column and a small-diameter annular rack. The outer moving device comprises an outer upper ring, a movable one-third arc transparent plate, a side column and a large-diameter annular rack. The frame body is composed of an upper disc, a lower disc and a stationary one-third arc transparent plate. By means of the pre-mixed abrasive jet flow externally-arranged jetting instrument protection device, stationarity of the inner upper ring and the outer upper ring moving at the lower side of the upper disc can be enhanced, and the inner moving device and the outer moving device can move in the same direction or in opposite directions; the phenomena that transmission are unstable at the positions where gears and the racks inside the device are engaged, and components get stuck can be effectively avoided; and the function that the device is entirely started or stopped is achieved.

Description

technical field [0001] The invention relates to the technical field of abrasive water jet mechanical auxiliary equipment design, in particular to a protective device for external injection equipment of a pre-mixed abrasive jet. Background technique [0002] The water jet is a high-speed water stream of different shapes formed by the nozzle, and the flow rate of the jet depends on the pressure drop before and after the nozzle outlet section. Water jetting is the simplest form of energy transformation and application. Usually, the power-driven pump completes a suction and discharge process of water, pumps a certain amount of water to the high-pressure pipeline, and makes it reach the nozzle with a certain amount of energy. The hole diameter of the nozzle is required to be much smaller than that of the high-pressure pipeline, so this certain amount of water reaching the nozzle must be accelerated if it wants to flow out of the nozzle hole. In this way, the water that accelera...

AI Technical Summary

Problems solved by technology

However, although the existing abrasive water jet equipment has superior characteristics, because the abrasive jet laboratory mainly uses water and sand as the medium, the environment in which the instruments are placed is harsh. When the external abrasive water jet equipment is idle, this will cause Damage to the external spraying instrument, the external spraying instrument is not well protected, which greatly reduces the service life of the external spraying instrument, and the existing protective device for the external spraying instrument of the pre-mixed abrasive jet still has poor instrument protection effect, Disadvantages such as internal parts are prone to jamming, difficult maintenance and cumbersome operation

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