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

Abstract

The utility model discloses an air blast type internal deslagging down-the-hole hammer rock-entering drilling machine construction device which comprises a down-the-hole hammer drilling machine, an air compressor and an oil-gas distributor, a power device and a drilling rod are installed on a mast of the down-the-hole drilling machine, a down-the-hole hammer head is installed at the bottom of the drilling rod, and the drilling rod is divided into an inner drilling rod and an outer drilling rod. The top of the inner drill rod and the top of the outer drill rod are provided with forward and reverse flow dividers, the down-the-hole hammer comprises a hammer body, a high-pressure air flushing cavity and a slag discharging channel are arranged in the hammer body, the bottom of the high-pressure air flushing cavity is provided with a sub-hammer head, and an air compressor injects high-pressure air into the forward and reverse flow dividers through an air inlet pipeline of an oil-gas distributor to drive the down-the-hole hammer head. High-pressure gas enters the high-pressure gas flushing cavity from the space between the inner drill rod and the outer drill rod to drive the down-the-hole hammer head to work for rock drilling and crushing, and then the high-pressure gas is released to carry rock debris to be discharged from the slag discharging pipe along the slag discharging channel and the inner cavity of the inner drill rod; the down-the-hole hammer head and the deslagging channel are arranged at the bottom of the high-pressure air flushing cavity, the air compressor outputs high-pressure air into the high-pressure air flushing cavity through the oil-gas distributor and transmits the high-pressure air to the plurality of down-the-hole sub hammer heads for working, and the released high-pressure air is discharged and carries rock debris and impurities in a pile hole to enter the inner cavity of the inner drill rod from the deslagging channel. And finally, the slag is discharged to a designated area through a slag discharge pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of down-the-hole hammers, and particularly relates to a construction equipment of an air-flushing inner-discharge down-the-hole hammer rock drilling rig. Background Technique

[0002] The basic principle of converting a rotary drilling rig into a down-the-hole hammer is to change the rock drilling mechanism 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 impact pressurization. By pressurization, a static load is generated to provide a certain gravitational pressure for rock excavation, and at the same time, rock excavation is formed to realize the rotary fragmentation of soft highly weathered rocks, so as to achieve the effect of accelerating the excavation of weathered rocks. This pressurization method is combined with each other to realize the excavation and hole formation of highly weathered rocks. However, it cannot proceed for hard granite, and the efficiency of using the pressurized rotary drilling method for moderately weathered rocks is low.

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

[0004] Since the down-the-hole hammer injects compressed air into the drill hole through a pipeline during actual use and uses the power of the air flow to blow out the rock debris and impurities in the hole, the disadvantage is that the rock debris and impurities can only be blown out from the top of the rock hole. At the beginning, the rock debris and impurities splash out. As the drill hole gets deeper and deeper, the discharge of rock debris and impurities is slow. Under the action of a certain frequency of air flow, they float repeatedly in the rock hole, the discharge efficiency is slow, not concentrated and irregular, and it is easy to generate dust. The existing equipment also has no measures for collecting rock debris and impurities, resulting in the splashing of rock debris and impurities at the construction site and causing environmental pollution. Summary of the Invention

[0005] The purpose of the utility model is to design a construction equipment of an air-flushing inner-discharge down-the-hole hammer rock drilling rig, which adopts inner and outer drill pipes and a down-the-hole hammer with a high-pressure air flushing cavity and a slag discharge channel to realize the discharge of rock debris and impurities, rationally utilize the discharged high-pressure gas, save energy, and at the same time solve the pollution problem.

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] The first object of the present utility model is to propose a pneumatic inner-discharge DTH hammer rock drilling rig construction equipment, which includes a DTH drill, an air compressor, and an oil-gas distributor. A power device and a drill pipe are installed on the mast of the DTH drill. A DTH hammer is installed at the bottom of the drill pipe. The drill pipe is divided into an inner drill pipe and an outer drill pipe. A forward and reverse diverter is installed at the top of the inner drill pipe and the outer drill pipe. The DTH hammer includes a hammer body. A high-pressure air chamber and a slag discharge channel are arranged in the hammer body. A sub-hammer head is installed at the bottom of the high-pressure air chamber. The air compressor injects high-pressure gas into the forward and reverse diverter through the oil-gas distributor to drive the DTH hammer to work and strike the rock. The high-pressure gas enters the high-pressure air chamber of the DTH hammer body from between the inner and outer drill pipes. Then, when the DTH hammer works, the released gas carries the rock debris along the slag discharge channel and discharges the rock debris from the inner cavity of the inner drill pipe through the slag discharge pipe.

[0008] Further, the air compressor is connected to the oil-gas distributor through an intake pipeline.

[0009] Further, the drill pipe is composed of a plurality of drill pipe sections combined.

[0010] Further, a shock absorber is installed on the power device.

[0011] Further, the hammer body includes a high-pressure air chamber. A plurality of sub-hammer heads are installed at the bottom of the high-pressure air chamber. The high-pressure air chamber and the sub-hammer heads are in mutual communication with high-pressure gas.

[0012] Further, a plurality of slag discharge channels are arranged in the DTH hammer. The plurality of slag discharge channels converge into a mixed gas chamber. A concentrated discharge pipe is arranged at the top of the mixed gas chamber. The discharge pipe is connected to the inner cavity of the inner drill pipe.

[0013] The second object of the present utility model is to propose a construction method of the pneumatic inner-discharge DTH hammer rock drilling rig construction equipment. The method is as follows:

[0014] Step 1: Level the site and measure and set out the lines.

[0015] Step 2: Position the pile driver and set down the casing.

[0016] Step 3: Calibrate the pile position point.

[0017] Step 4: Start the pile driver, start the air compressor, and start drilling.

[0018] Step 5: Compressed air enters the high-pressure air chamber along the channel between the inner and outer drill pipes to drive the DTH hammer to work and strike the rock.

[0019] Step 6: When the DTH hammer works, the released gas carries the rock debris along the slag discharge channel into the inner cavity of the inner drill pipe, and discharges the rock debris through the slag discharge pipe to the designated area.

[0020] Step 7: After drilling to the set depth, remove the residue at the bottom of the hole.

[0021] Step 8: Lift the drill pipe above the ground, and move the pile driver to the next pile position.

[0022] The following beneficial effects can be obtained through the above technical solutions:

[0023] The down-the-hole hammer drill designed by the utility model 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 debris and impurities in the pile hole into the inner cavity of the inner drill pipe through the slag discharge channel, and finally is discharged to the designated area through the slag discharge pipe.

[0024] On the one hand, the above method reasonably utilizes the released high-pressure gas, reuses the high-pressure gas, and at the same time, the high-pressure gas can carry the rock debris and impurities to the designated area, and also prevents the rock debris and impurities from splashing everywhere. Compared with the existing equipment, it can completely reduce environmental pollution.

[0025] In terms of energy consumption, the existing equipment requires 4 air compressors to make the equipment operate, while the utility model only needs two air compressors to operate smoothly, and the oil and gas distributor can be connected to multiple air impact and slag discharge type down-the-hole hammer rock drilling construction equipment at the same time. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the equipment.

[0027] Figure 2 It is a schematic diagram of the inside of the down-the-hole hammer.

[0028] In the figure:

[0029] In the figure: 1. Down-the-hole hammer drill; 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. Intake pipe, 10. Power device. Detailed Embodiments

[0030] The following further describes the utility model with reference to the drawings:

[0031] Embodiment 1: As Figure 1-2As shown in the figure, the construction equipment of the air-jet type inner-discharge DTH hammer rock drilling rig includes a DTH hammer drilling rig 1 and an air compressor 2. The mast of the DTH hammer drilling rig is equipped with a power device 10 and a drill pipe 5. The bottom of the drill pipe is equipped with a DTH hammer 7. The drill pipe is divided into an inner drill pipe and an outer drill pipe. A positive and negative diverter 3 is installed at the top of the inner drill pipe and the outer drill pipe. The DTH hammer includes a hammer body. A high-pressure air injection chamber 74 and a slag discharge channel 73 are arranged inside the hammer body. A number of sub-hammers are installed in the high-pressure air injection chamber. The air compressor injects high-pressure gas into the positive and negative diverter through an air inlet pipe 9 to drive the DTH hammer to work. An oil and gas distributor 8 is installed on the air inlet pipe. The oil and gas distributor 8 can be respectively connected to supply air and lubricate with oil for a number of groups of DTH hammer construction equipment. The high-pressure gas enters the high-pressure air injection chamber of the DTH hammer body from between the inner and outer drill pipes. Then, when the DTH hammer works, the released gas carries rock debris along the slag discharge channel and discharges the rock debris from the inner cavity of the inner drill pipe through the slag discharge pipe. The drill pipe is composed of a number of drill pipe sections, and the appropriate number of drill pipe sections can be selected according to the actual operation depth. A shock absorber is provided at the interface between the power device and the drill pipe. The hammer body includes a high-pressure air injection chamber. A number of sub-hammers are installed at the bottom of the high-pressure air injection chamber. An air passage is provided in the middle of the sub-hammer 76. The tops of a number of slag discharge channels converge to a mixed gas chamber 72. The top of the mixed gas chamber is integrated with a discharge pipe 71. The discharge pipe 71 communicates with the inner cavity of the inner drill pipe.

[0032] Embodiment 2: A construction method of the construction equipment of the air-jet type inner-discharge DTH hammer rock drilling rig is as follows:

[0033] Step 1: Level the site and measure and set out the lines.

[0034] Step 2: Position the pile driver and lower the casing 6.

[0035] Step 3: Calibrate the pile position point.

[0036] Step 4: Start the pile driver, turn on the air compressor, and start drilling.

[0037] Step 5: Compressed air enters the high-pressure air injection chamber along the channel between the inner and outer drill pipes to drive the DTH hammer to work and strike the rock.

[0038] Step 6: When the DTH hammer works, the released gas carries rock debris along the slag discharge channel into the inner cavity of the inner drill pipe and discharges the rock debris through the slag discharge pipe to the designated area.

[0039] Step 7: After drilling to the set depth, remove the residue at the bottom of the hole.

[0040] Step 8: Lift the drill pipe above the ground, and the pile driver moves to the next pile position.

[0041] The above are all preferred embodiments of the present utility model. For those of ordinary skill in the art, without departing from the principle of the present utility model, modifications to various equivalent forms of the present utility model all fall within the protection scope of the appended claims of this application.

Claims

1. The construction equipment of the pneumatic inner-discharge dth hammer rock drilling rig is characterized in that: It includes a down-the-hole drill (1), an air compressor (2) and an oil and gas distributor (8). A power device (10) and a drill pipe (5) are installed on the mast of the down-the-hole drill. A down-the-hole hammer (7) is installed at the bottom of the drill pipe. The drill pipe is divided into an inner drill pipe and an outer drill pipe. A forward and reverse diverter (3) is installed at the top of the inner drill pipe and the outer drill pipe. The down-the-hole hammer includes a hammer body. A high-pressure air chamber (74) and a slag discharge channel (73) are arranged in the hammer body. A sub-hammer head (76) is installed at the bottom of the high-pressure air chamber. The air compressor injects high-pressure gas into the forward and reverse diverter through the oil and 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 chamber of the down-the-hole hammer body from between the inner and outer drill pipes. Then, when the down-the-hole hammer works, the released gas carries the rock debris along the slag discharge channel and discharges the rock debris through the inner cavity of the inner drill pipe and the slag discharge pipe.

2. The pneumatic internal-discharge down-the-hole hammer rock drilling rig construction equipment according to claim 1, characterized in that: The air compressor is connected to the oil and gas distributor through an intake pipe (9).

3. The pneumatic impact internal slag-discharging down-the-hole hammer rock drilling rig construction equipment according to claim 1, characterized in that: The drill pipe is composed of several sections of drill pipes combined.

4. The pneumatic impact internal slag-discharging down-the-hole rock drilling rig construction equipment according to claim 1, characterized in that: A shock absorber is installed on the power device.

5. The pneumatic impact internal slag-discharging down-the-hole rock drilling rig construction equipment according to claim 1, characterized in that: The hammer body includes a high-pressure air chamber (74). A plurality of sub-hammer heads (76) are installed at the bottom of the high-pressure air chamber. The high-pressure air chamber and the sub-hammer heads are in mutual communication with high-pressure gas.

6. The construction equipment of the pneumatic impact internal slag-discharging down-the-hole hammer rock drilling rig according to claim 1, characterized in that: Several slag discharge channels are arranged in the down-the-hole hammer. The several slag discharge channels converge into a mixed gas chamber (72). The top of the mixed gas chamber is provided with an integrated discharge pipe (71). The discharge pipe (71) is connected to the inner cavity of the inner drill pipe.

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