Experiments show that when the gas drill is drilling normally, check the discharge of rock dust and cuttings at the orifice and the footage. When the powder discharge and the footage are normal, there is no need to lift the drill.
If only the footage is normal, the drilling tool should be lifted once after the water well drilling rig has drilled a certain footage (the impactor is not working at this time) to generate a relatively large upward and return wind speed, and wait until the rock dust and cuttings are blown out of the hole, place the drill tool at the bottom of the hole to continue drilling.
At this time, the drill tool can be lifted up, and the larger drop blocks can be blown out of the orifice, and the drop blocks with a mass of 510g can be blown out. In short, the bottom of the hole of the water well drilling rig should be kept clean.
When the pneumatic water well boring machine is drilling, you should always check the pressure change of the wind pressure gauge. When the wind pressure suddenly increases, it is difficult to lift the drill tool at the same time. It may be that the upper part of the down-the-hole hammer forms a mud or buried drill.
If the upper infarct can be blown away by the rated working pressure of the air compressor while the drilling tool is being driven, the water well drilling rig can continue drilling. If it is invalid, water can be injected from the orifice to dilute the mud and blow out the orifice, or a certain foaming agent can be injected from the drill pipe to dilute and sweep away.
When a single drill pipe is connected, the air supply will start after the active drill pipe is connected. After the bottom of the hole of the water well boring machine is blown clean, the drilling can be continued. Do not lower the down-the-hole hammer to the bottom of the hole before supplying air. In this way, it is easy to form infarction by cuttings in the DTH hammer.
After the hole is blown for 1-2 minutes, lift the active drill pipe to the front to stop the gas supply.
The oil should be filled in time when the drill pipe is connected to prevent the loss of the piston and the cylinder liner.