Coal mine down-hole drill hole water jet negative-pressure dedusting device

Abstract

The invention discloses a coal mine down-hole drill hole water jet negative-pressure dedusting device, which comprises a guide hood, a guide hose, a negative-pressure dedusting pipe, a fog-spray nozzle, a high pressure water inlet pipe, a three-way pipe, wherein the guide hood is provided with an inlet, an outlet and a drill rod through hole; the outlet of the guide hood is connected with the guide hose and the negative-pressure dedusting pipe in turn; the water outlet of the high pressure water inlet pipe extends into the negative-pressure dedusting pipe; the water outlet of the high pressure water inlet pipe is connected with the fog-spray nozzle; the high pressure water inlet pipe is fixedly connected with the pipe wall of the negative-pressure dedusting pipe; the water inlet of the high pressure water inlet pipe is communicated with a down-hole high pressure water pipe; the high pressure water inlet pipe is connected in series with the three-way pipe and a water inlet valve; another inlet of the three-way pipe is connected with a high pressure air inlet pipe; an air intake valve is arranged on the high pressure air inlet pipe; the high pressure air inlet pipe is communicated with a down-hole high pressure air pipe; the bottom at the rear end of the negative-pressure dedusting pipe is provided with a drain hole; and the drain hole is communicated with a drainage hose.

Description

technical field [0001] The invention belongs to the technical field of underground drilling in coal mines, and in particular relates to a water jet negative pressure dedusting device at an orifice of an underground drilling rig in coal mines. Background technique [0002] Drilling is an important step to ensure safe production in coal mines. Its main purpose is to drain the gas in the coal seam in advance. Usually the drilling depth is 40 meters to 60 meters. Coal cutting is usually blown out of the drill hole with compressed air, causing a lot of dust to the working environment Pollution has brought great harm to the health of workers. In addition, dust is also one of the main natural disasters in coal mines. When the dust concentration reaches a certain level, it is very easy to cause dust explosion. Therefore, controlling the dust at the orifice of the drilling rig has always been an important issue for the safe production of coal mines. [0003] Currently known dust re...

AI Technical Summary

Problems solved by technology

These equipments are bulky and expensive, and all need a power plant to provide power

Images