Air impact type internal deslagging down-the-hole hammer rock-entering drilling machine construction equipment and construction method thereof

Abstract

According to the air-blast type internal deslagging down-the-hole hammer rock-entering drilling machine construction equipment and the construction method thereof, a down-the-hole hammer head and a deslagging channel are arranged at the bottom of a designed high-pressure air-blast cavity, an air compressor outputs high-pressure air into the high-pressure air-blast cavity through an oil-gas distributor and transmits the high-pressure air to a plurality of down-the-hole sub-hammer heads to work, and the released high-pressure air is discharged; and rock debris and impurities in the pile hole are carried to enter the inner cavity of the inner drill rod from the slag discharging channel and finally discharged to a designated area through the slag discharging pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of down-the-hole hammers, and in particular relates to construction equipment of a gas-impact internal slag removal down-the-hole hammer rock drilling rig and a construction method thereof. Background Art

[0002] The basic principle of converting a rotary drilling rig into a down-the-hole hammer is to change the mechanism of rock drilling of the rotary drilling rig from pressurized rotary drilling to pneumatic impact. The rotary drilling rig usually adopts a combination of oil cylinder pressurization and point punching pressurization. The static load is generated by pressurization, which provides a certain gravity pressurization for rock excavation. At the same time, it forms a rock punching and excavation, and effectively crushes the soft and highly differentiated rock, thereby accelerating the excavation of differentiated rock. This pressurization method is combined with each other to achieve the excavation and hole formation of highly differentiated rock. However, it is impossible to make progress in hard granite, and the efficiency of using pressurized rotary drilling for medium differentiated rock is low.

[0003] The down-the-hole hammer drilling technology uses compressed air as a power source, and the down-the-hole hammer generates a certain frequency of impact to break the rock. This technology transmits the impact force to the drill bit, and drills through the pulsating impact to break the rock. Compared with traditional rotary drilling, the down-the-hole hammer drilling technology shows a stronger penetration ability, which greatly improves the drilling speed in hard rock formations.

[0004] During actual use, the down-the-hole hammer injects compressed air into the borehole through a pipeline, and uses the force of the airflow to blow the rock cuttings and impurities in the hole out of the hole. However, the disadvantage is that the rock cuttings and impurities can only be blown out from the top of the rock hole. At the beginning, the rock cuttings and impurities splash out. As the borehole gets deeper and deeper, the rock cuttings and impurities are discharged slowly. At a certain frequency, the airflow acts on the rock hole to float repeatedly, and the discharge effect is slow, not concentrated and regular, and it is easy to raise dust. The existing equipment also has no measures to collect rock cuttings and impurities, resulting in rock cuttings and impurities splashing on the construction site, causing environmental pollution. Summary of the invention

[0005] The purpose of the present invention is to design an air-flushing internal slag discharge down-the-hole hammer rock drilling rig construction equipment and a construction method thereof, which adopts internal and external drill rods and a down-the-hole hammer with a high-pressure air-flushing air cavity and a slag discharge channel to achieve the discharge of rock cuttings and impurities, and reasonably utilize the discharged high-pressure gas to save energy and solve the pollution problem at the same time.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: The first purpose of the present invention is to provide an air-impact type internal slag removal down-the-hole hammer rock drilling rig construction equipment, including a down-the-hole drill, an air compressor and an oil-gas distributor. The mast of the down-the-hole drill is equipped with a power unit and a drill rod. The bottom of the drill rod is equipped with a down-the-hole hammer. The drill rod is divided into an inner drill rod and an outer drill rod. The tops of the inner drill rod and the outer drill rod are equipped with forward and reverse diverters. The down-the-hole hammer includes a hammer body. A high-pressure air-impacting chamber and a slag removal channel are arranged in the hammer body. A sub-hammer head is installed at the bottom of the high-pressure air-impacting chamber. The air compressor injects high-pressure gas into the forward and reverse diverter through the oil-gas distributor to drive the down-the-hole hammer to work and hit the rock. The high-pressure gas enters the high-pressure air-impacting chamber of the down-the-hole hammer body from between the inner and outer drill rods. Then the down-the-hole hammer releases gas to carry rock cuttings along the slag removal channel and discharge the rock cuttings from the inner cavity of the inner drill rod through the slag removal pipe.

[0007] Furthermore, the air compressor is connected to the oil and gas distributor via an air intake pipe.

[0008] Furthermore, the drill rod is composed of a plurality of drill rod sections.

[0009] Furthermore, a shock absorber is installed on the power unit.

[0010] Furthermore, the hammer body includes a high-pressure air-charging chamber, a plurality of sub-hammer heads are installed at the bottom of the high-pressure air-charging chamber, and the high-pressure gas of the high-pressure air-charging chamber and the sub-hammer heads are connected to each other.

[0011] Furthermore, a plurality of slag discharge channels are arranged in the down-the-hole hammer, and the plurality of slag discharge channels are gathered into the mixed gas chamber, and a concentrated discharge pipe is arranged at the top of the mixed gas chamber, and the discharge pipe is communicated with the inner cavity of the inner drill pipe.

[0012] The second object of the present invention is to provide a construction method for a pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment, the method being as follows: Step 1: Level the site and measure and lay out the lines; Step 2: The pile driver is in place and the casing is installed below; Step 3: Correct the pile position; Step 4: Start the pile driver, start the air compressor, and start drilling; Step 5: Compressed air enters the high-pressure air chamber along the channel between the inner and outer drill pipes, driving the down-the-hole hammer to hit the rock; Step 6: When the down-the-hole hammer is working, the gas released carries the cuttings along the slag discharge channel into the inner cavity of the inner drill pipe, and the cuttings are discharged through the slag discharge pipe to the designated area; Step 7: After drilling to the set depth, remove the residue at the bottom of the hole; Step 8: Lift the drill rod above the ground and move the pile driver to the next pile position.

[0013] The following beneficial effects can be obtained through the above technical solution: The down-the-hole hammer drill designed in the present invention has a high-pressure air chamber and a slag discharge channel. After the air compressor directly transmits the impact force of the gas to the drill bit, the released high-pressure gas is discharged from the bottom of the hammer head, and carries the rock cuttings and impurities in the pile hole into the inner cavity of the inner drill rod through the slag discharge channel, and is finally discharged to a designated area through the slag discharge pipe.

[0014] On the one hand, the above method makes reasonable use of the released high-pressure gas and reuses the high-pressure gas. At the same time, the high-pressure gas can bring rock cuttings and impurities to the designated area and prevent rock cuttings and impurities from splashing. Compared with existing equipment, it can completely reduce environmental pollution.

[0015] In terms of energy consumption, the existing equipment requires four air compressors to operate the equipment, while the present invention only requires two air compressors to operate freely. The oil and gas distributor can be connected to multiple air-blast slag removal down-the-hole hammer rock drilling rig construction equipment at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the equipment.

[0017] Figure 2 This is a schematic diagram of the inside of a down-the-hole hammer.

[0018] In the figure: In the figure: 1. down-the-hole hammer drilling rig; 2. air compressor; 3. forward and reverse diverter; 4. slag discharge pipe; 5. drill pipe; 6. casing; 7. down-the-hole hammer; 8. oil and gas distributor; 9. air intake pipe; 10. power unit. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings: Example 1: Figure 1-2As shown, an air-impact type internal slag removal down-the-hole hammer rock drilling rig construction equipment comprises a down-the-hole hammer drill 1 and an air compressor 2, a mast-mounted power device 10 and a drill rod 5 of the down-the-hole hammer drill rig, a down-the-hole hammer 7 is mounted at the bottom of the drill rod, the drill rod is divided into an inner drill rod and an outer drill rod, and a forward and reverse diverter 3 is mounted on the top of the inner drill rod and the outer drill rod, the down-the-hole hammer comprises a hammer body, a high-pressure air-impacting chamber 74 and a slag removal channel 73 are arranged in the hammer body, a plurality of sub-hammer heads are installed in the high-pressure air-impacting chamber, the air compressor injects high-pressure gas into the forward and reverse diverter through an air intake pipe 9 to drive the down-the-hole hammer to work, an oil-gas distributor 8 is installed on the air intake pipe, and the air supply and oil supply lubrication of several groups of down-the-hole hammer construction equipment can be respectively connected through the oil-gas distributor 8, the high-pressure gas enters the high-pressure air-impacting chamber of the down-the-hole hammer body from between the inner and outer drill rods, and then the down-the-hole hammer works to release gas to carry rock cuttings along the slag removal channel and discharge the rock cuttings from the inner cavity of the inner drill rod through the slag removal pipe. The drill rod is composed of a plurality of drill rod sections, and the appropriate number of drill rod sections can be selected according to the actual operating depth. A shock absorber is provided between the power device and the drill rod. The hammer body includes a high-pressure air-injection chamber, a plurality of sub-hammers are installed at the bottom of the high-pressure air-injection chamber, an air channel is provided in the middle of the sub-hammer 76, and a plurality of slag discharge channels are collected at the top of the mixed air chamber 72, and the top of the mixed air chamber is integrated with a discharge pipe 71, and the discharge pipe 71 is communicated with the inner cavity of the inner drill rod.

[0020] Embodiment 2: A construction method of a gas-impact type internal slag removal down-the-hole hammer rock drilling rig construction equipment, the method is as follows: Step 1: Level the site and measure and lay out the lines; Step 2: The pile driver is in place and a casing 6 is installed underneath; Step 3: Correct the pile position; Step 4: Start the pile driver, turn on the air compressor, and start drilling; Step 5: Compressed air enters the high-pressure air chamber along the channel between the inner and outer drill pipes, driving the down-the-hole hammer to hit the rock; Step 6: When the down-the-hole hammer is working, the gas released carries the cuttings along the slag discharge channel into the inner cavity of the inner drill pipe, and the cuttings are discharged through the slag discharge pipe to the designated area; Step 7: After drilling to the set depth, remove the residue at the bottom of the hole; Step 8: Lift the drill rod above the ground and move the pile driver to the next pile position.

[0021] The above are all preferred embodiments of the present invention. For ordinary technicians in this technical field, without departing from the principle of the present invention, various equivalent modifications to the present invention belong to the protection scope of the claims attached to this application.

Claims

1. Air-impact internal slag removal down-the-hole hammer rock drilling rig construction equipment, characterized by: The invention comprises a down-the-hole drilling machine (1), an air compressor (2) and an oil-gas distributor (8), a mast-mounted power device (10) and a drill pipe (5) of the down-the-hole drilling machine, a down-the-hole hammer (7) being mounted at the bottom of the drill pipe, the drill pipe being divided into an inner drill pipe and an outer drill pipe, a forward and reverse flow divider (3) being mounted at the top of the inner drill pipe and the outer drill pipe, the down-the-hole hammer comprising a hammer body, a high-pressure air-injection chamber (74) and a slag discharge passage (73) being arranged in the hammer body, a sub-hammer head (76) being mounted at the bottom of the high-pressure air-injection chamber, the air compressor injects high-pressure gas into the forward and reverse flow divider through the oil-gas distributor (8) to drive the down-the-hole hammer to work and strike the rock, the high-pressure gas enters the high-pressure air-injection chamber of the down-the-hole hammer body from between the inner and outer drill pipes, and then the down-the-hole hammer releases gas to carry rock cuttings along the slag discharge passage and discharge the rock cuttings from the inner cavity of the inner drill pipe through the slag discharge pipe.

2. The pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment according to claim 1 is characterized by: The air compressor is connected to the oil and gas distributor via an air intake pipeline (9).

3. The pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment according to claim 1 is characterized by: The drill rod is composed of a plurality of drill rod sections.

4. The pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment according to claim 1 is characterized by: Shock absorbers are installed on the power unit.

5. The pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment according to claim 1 is characterized by: The hammer body comprises a high-pressure air-charging chamber (74), a plurality of sub-hammer heads (76) are installed at the bottom of the high-pressure air-charging chamber, and the high-pressure gas of the high-pressure air-charging chamber and the sub-hammer heads are in communication with each other.

6. The pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment according to claim 1 is characterized by: A plurality of slag discharge channels are arranged in the down-the-hole hammer, and the plurality of slag discharge channels are gathered into a mixed gas chamber (72). The top of the mixed gas chamber is an integrated discharge pipe (71), and the discharge pipe (71) is connected to the inner cavity of the inner drill pipe.

7. A construction method for the pneumatic internal slag removal down-the-hole hammer rock drilling rig construction equipment according to claim 1, characterized in that: The method is as follows: Step 1: Level the site and measure and lay out the lines; Step 2: The pile driver is in place and the casing is installed below; Step 3: Correct the pile position; Step 4: Start the pile driver, start the air compressor, and start drilling; Step 5: Compressed air enters the high-pressure air chamber along the channel between the inner and outer drill pipes, driving the down-the-hole hammer to hit the rock; Step 6: When the down-the-hole hammer is working, the gas released carries the cuttings along the slag discharge channel into the inner cavity of the inner drill pipe, and the cuttings are discharged through the slag discharge pipe to the designated area; Step 7: After drilling to the set depth, remove the residue at the bottom of the hole; Step 8: Lift the drill rod above the ground and move the pile driver to the next pile position.

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