Automatic powder discharging water jet capable of realizing one-way filtering and high-low pressure water flow conversion

Abstract

An automatic powder discharging water jet capable of realizing one-way filtering and high-low pressure water flow conversion comprises a rod and a drill bit. A screw conveyer is arranged on the outer wall of the rod, the drill bit is connected with the rod, a center channel is formed in the rod and used for circulation of water flow, a plurality of jet flow sprayers penetrating the side wall of the rod are arranged at the tail end of the rod, female connectors are arranged at two ends of the rod, annular limit projections are arranged at the connecting positions of the tail of the center channel and the female connectors, the rod is connected with the drill bit through a rod-shaped connector with a center through hole, the tail end of the connector is connected with the head end of the rod in a screwed manner, a one-way valve is arranged in the through hole at the tail end of the connector, water flow unidirectionally flows into the drill bit through the one-way valve, the head end of the connector is inserted into the drill bit through a rod-shaped connection portion, a filter screen is arranged in a center through hole of the head end of the connector, a limit pin for fixing the drill bit is arranged on the side wall of the rod-shaped connection portion, a high-low pressure water flow conversion mechanism is arranged on the rod and positioned in the center channel among the connectors and the annular limit projections. The water jet is simple in structure and high in efficiency.

Description

technical field [0001] The invention relates to the field of underground coal mine machinery and equipment, in particular to a self-draining powder-type high-low pressure water flow automatic conversion water jet capable of one-way filtration. Background technique [0002] As the depth of coal seam drilling increases, the stress between coal seams also gradually increases. The gas drainage holes drilled by ordinary small drill bits are easily squeezed back by the stress between coal seams, which greatly reduces the efficiency of gas drainage. Since the hydraulic drilling technology was discovered in the 1980s, it has not been gradually applied to coal seam mining until now. However, due to the hydraulic drilling operation mode, the drilling rod needs to be pulled out when punching, and the punching equipment can be changed to realize hydraulic punching. Most of these devices are relatively heavy, have many accessories, complex procedures, and when the drill pipe is introduc...

AI Technical Summary

Problems solved by technology

However, due to the hydraulic drilling operation method, it is necessary to pull out the drill pipe and replace it with punching equipment to realize hydraulic punching.

Most of these devices are relatively heavy, have many accessories, complex procedures, and when the drill pipe is introduced into the drill pipe for the second time, the introduction will not be smooth due to hole collapse and other reasons, which seriously affects the gas drainage work, resulting in low drilling efficiency and increased labor intensity. Adverse effects on production efficiency and other aspects

Images