Electric and phneumatic drill rig in Shaanxi, China

and a bit. During the working process, the piston of the impactor continuously

impacts the tail. The alloy teeth on the bit continually impact the rock, and the

rotating torque generated by the reducer causes the drilling tool to rotate and propel

the axial force generated by the cylinder. Drill holes into the drill.

Structural characteristics

The 70 type down-the-hole drilling rig is composed of a dynamic bearing mechanism,

a speed reducer, a pneumatic motor, a propulsion cylinder, an impactor, an oil mister

and a pneumatic control valve.

The operating procedures

(1) Transportation preparation work

(1) After the drilling rig is transported to the construction site, inspect the components

and whether the parts are defective or not, and then assemble and refuel.

(2) First, the two front legs of the carriage are located at the working position, and the

support rod is adjusted to determine the angle of the carriage.

(3) Before connecting the motor and the hose, the hose should be carefully cleaned.

The pipeline valve can be opened for a few seconds, and the foreign matter in the

hose is blown off with compressed air.

(4) Check whether the bolts are tightly connected, whether the pipelines are firmly

connected, and there is no leakage or oil leakage.

(5) Install an appropriate amount of 30# oil in the oil mister.

(6) The handles of the pneumatic control valve are all placed in the "stop" position.

After the preparation is completed, the no-load test can be carried out.

Work procedures

(1) opening

Raise the reducer to the upper limit position, tighten the drill rod, and then turn on the

air motor. After the normal load is normal, slowly open the engine to advance the

cylinder, place the drill head on the working surface, close the propulsion cylinder,

and then open the impactor and drill. Progress. When the drill head is drilled to about

100 mm, the drill will always maintain a certain propulsive force. Pay attention to

observe whether the oil mister supplies oil and adjust the oil supply.

(2) Install rod

After drilling the first drill pipe, stop the movement of the air motor, close the

impactor to stop feeding, set the reducer to the lower limit position, fix the drill pipe

in the clamp with a fork, reverse the reducer, and make the drill The rod is disengaged

from the joint on the reducer. Then raise the reducer to the upper limit position and

insert it into the second drill pipe. After the connection is secure, the drilling operation

can be performed.

(3) Unloading rod

When the drill pipe is drilled into contact with the loader, the rotation is stopped, and

a special round bar is inserted into the hole on the outer side of the unloader, and the

unloader is rotated to make the second flat groove at the end of the drill pipe be

aligned. The rectangular groove of the device, inserting the fork, reversing the motor,

disengaging the joint on the reducer from the drill pipe, and adjusting the first flat

groove on the tail end of the drill pipe to the rectangular groove of the forward

unloader, inserting Another fork, then remove the fork in the card holder and let the

unloader and the other fork drive the drill rod back. (The motor can be moved slowly

and can not be reversed.) When the second flat groove at the end of the next drill pipe

is aligned with the rectangular groove of the fastener, insert the fork and reverse the

motor to make the upper and lower drill pipes After the coupling thread is disengaged,

take the upper drill rod, slowly lower the reducer, and align the rectangular groove of

the unloader to the first flat groove at the end of the next drill pipe, and then repeat the

above actions, in turn Remove the drill pipe.

Operational precautions

(1) The operator must be trained and familiar with the operation method before

operating independently.

(2) The operating valve must be placed in the "stop" position before the compressed

air (ie, air supply) is turned on.

(3) The rig must be supported firmly before starting work to prevent the rig from

falling to the ground.

(4) During the feeding process, it is strictly forbidden to open and push the cylinder

suddenly and quickly to avoid jacking up the rig and causing an accident.

(5) Always check the lubrication of the air motor.

(6) Always check the connection of each pipe, nut, joint, etc. at any time.

(7) Reverse rotation is not allowed during drilling to avoid tripping of the drill pipe.

(8) During the operation of the drilling rig, it should be noted that the sound andmechanical movement of the impactor are normal. If abnormal phenomena are found,

the machine should be stopped immediately for inspection.

(9) When adding the drill pipe, pay special attention to the cleaning inside the hole to

avoid the damage caused by the sand mixed into the internal damage.

Email: macy@ztmineequipment.com