A two-stage gas-filling adjustable ratio gas-liquid mixing nozzle device and its use method

Abstract

The invention relates to a two-stage gas-filling adjustable ratio gas-liquid mixing nozzle device and its use method. The device includes a nozzle assembly, a valve body assembly and a piston assembly. The nozzle assembly includes a nozzle seat and a nozzle. The valve body assembly includes a valve body, a spring, Gland, screw rod and valve core, the piston assembly includes a piston cylinder, high-pressure gas is introduced into the device through the air pipe joint of the nozzle seat, and high-pressure water is introduced into the water inlet joint of the piston cylinder to turn the pure water jet into gas. Bubble flow or slug flow mixed with liquid, high-pressure gas is based on the nozzle seat to realize secondary gas filling, which improves the jet erosion ability; at the same time, the compression degree of the spring is changed by adjusting the screw rod, so as to control the gap between the valve core and the valve body. The overcurrent annulus can achieve the purpose of controlling the water flow and adjusting the gas-liquid ratio; this application solves the problems of serious atomization, low erosion efficiency and non-adjustable gas-liquid ratio of conventional gas-liquid two-phase water jets. The working conditions can effectively improve the efficiency of jet rock breaking.

Description

technical field [0001] The invention relates to a two-stage gas-filling adjustable ratio gas-liquid mixing nozzle device and a use method thereof, which belong to the technical field of high-pressure water jet engineering. Background technique [0002] The distribution of mineral resources in my country shows a state of more coal and less oil. Therefore, coal, as one of the important energy sources supporting economic development, has a huge demand. With the wide application of high-pressure water jets, it has gradually evolved into a hot field in coal seam gas mining. . In recent years, with the research and application of new high-pressure jet technologies such as abrasive jet, cavitation jet, pulse jet, self-excited oscillation jet and gas-liquid two-phase jet, the efficiency of coal mining has been greatly improved. [0003] However, the above-mentioned new high-pressure jet technology has more or less problems such as serious abrasive wear and damage, limited target dis...

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Problems solved by technology

[0004] The present invention provides a two-stage gas-filling adjustable ratio gas-liquid mixing nozzle device and its use method, which solves the problems of severe atomization, low erosion efficiency and non-adjustable gas-liquid ratio of conventional gas-liquid two-phase water jets pointed out in the background technology. problem, it can effectively improve the efficiency of jet rock breaking

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