CN216341882U - Mud reverse circulation down-the-hole hammer drill - Google Patents

Abstract

The utility model discloses a mud reverse circulation down-the-hole hammer drill. The drilling machine consists of a drilling machine using a telescopic drill rod, a cluster down-the-hole hammer and an air compressor. The high-pressure air drives the cluster down-the-hole hammer, the slag discharge is in a mud gas lift reverse circulation mode, and the mud protective wall prevents the covering layer from collapsing holes without the follow-up of a protective cylinder. The utility model overcomes the defects that the air circulation slag discharge of the down-the-hole hammer drill in the prior art is easy to collapse, a protective cylinder is required to follow, and the geological requirement is strict; the drilling machine has the advantages of small type, low equipment cost, no need of casing follow-up for mud wall protection, ultra-fast drilling speed of hard rock, ultra-low comprehensive cost and capability of constructing ultra-large diameter rock-entering pile holes of ultra-deep covering layers, and the telescopic drill rod is matched with the down-the-hole hammer for drilling.

Description

Mud reverse circulation down-the-hole hammer drill

Technical Field

The utility model relates to the technical field of a submersible cluster hole hammer drilling machine, in particular to a mud reverse circulation submersible hole hammer drilling machine.

Background

The existing down-the-hole hammer drilling machine with the telescopic drill rod adopts air circulation as deslagging, the air circulation is used for discharging drilling slag to scour the hole wall to cause hole collapse, a mud wall protection function is not provided, a pile casing is required to follow, the pile casing following speed is low, the cost is high, the comprehensive construction speed is reduced, the construction cost is greatly increased, the defect that a deep overburden rock-entering drilling pile cannot be constructed exists, although the down-the-hole hammer is high in drilling efficiency and speed, the down-the-hole hammer is suitable for severe geological conditions, and large-area popularization cannot be achieved.

Therefore, the development of a mud circulation down-the-hole hammer drilling machine which has the advantages of low equipment manufacturing cost, large drilling diameter, no need of a pile casing to follow, high construction speed and low cost and can construct a large-diameter ultra-deep overburden rock-entering drilling pile is needed.

Disclosure of Invention

The utility model aims to provide a mud reverse circulation down-the-hole hammer drill which is a basement rock soil drilling machine, and the equipment can be used for constructing large-diameter ultra-deep overburden rock-entering drill holes; the defects that the full casing follow-up cost of the existing telescopic drill rod down-the-hole hammer drilling machine is high, and an ultra-deep covering rock-entering drilling pile cannot be constructed are overcome.

In order to achieve the purpose of the utility model, the technical scheme of the utility model is as follows: the utility model provides a mud reverse circulation down-the-hole hammer rig which characterized in that: the device comprises a cluster down-the-hole hammer, a pile frame, a power head, a drill rod, a slurry discharge pipe, an air inlet and exhaust pipe, a steel wire rope, a multi-channel drill rod joint, an external tap and a drilling machine;

the drill rod is a multi-layer telescopic drill rod, the outermost drill rod of the drill rod is hung on the power head on the pile frame, and the power head drives the outermost drill rod of the drill rod to drive the cluster down-the-hole hammer to rotate;

the steel wire rope penetrates through the top opening of the outer faucet and the drill rod and is fixed on an elevator in the multi-channel drill rod joint between the drill rod and the cluster down-the-hole hammer;

the air inlet pipe and the exhaust pipe penetrate through the outer faucet and the drill rod, enter the multi-channel drill rod joint, pass through the elevator rotating channel, enter the down-the-hole hammer of the cluster down-the-hole hammer through the air inlet pipe, and are connected to the exhaust channel of the cluster down-the-hole hammer through the exhaust pipe;

in the scheme, the drilling machine is various drilling machines using telescopic drill rods or a drilling machine simply modified by a crawler crane, and the structure of the drilling machine modified by the crawler crane comprises the crawler crane, the pile frame and the power head;

in the scheme, each single down-the-hole hammer on the cluster down-the-hole hammer is provided with a closed outer sleeve, all exhaust gas of the collected down-the-hole hammer is discharged into an exhaust channel inside the cluster down-the-hole hammer, and the bottom of the down-the-hole hammer is not provided with an exhaust hole;

in the scheme, the slag suction pipe of the cluster down-the-hole hammer is communicated with the multi-channel drill rod joint, the drill rod, the outer tap, the slurry discharge pipe and the slurry processor;

in the above-mentioned scheme, multichannel drilling rod joint structure includes: the drill pipe short joint, the multi-channel elevator, the air inlet and exhaust pipes, the steel wire rope, the central drill pipe, the outer layer drill pipe and the cluster down-the-hole hammer; the multi-channel elevator is fixed in the short drill rod joint, the air inlet pipe, the air outlet pipe and the steel wire rope are connected with the multi-channel elevator, the short drill rod joint is connected with the central drill rod and the cluster down-the-hole hammer in a square joint mode, and a slurry channel is arranged in the multi-channel drill rod joint;

in the above aspect, the external faucet structure includes: the device comprises a steel wire rope, an air inlet and exhaust pipe, a rotary joint, an outer layer drill rod, an inner layer drill rod, an overflow pressure relief cylinder, a slurry return pipe, a centralizing wheel and a slurry discharge pipe; the rotary joint rotatably connects the slurry discharge pipe and the overflow pressure relief cylinder with the top of the outer drill rod, the steel wire rope, the air inlet pipe and the air outlet pipe penetrate through the middle of a centralizing wheel of a central through hole of a bottom plate of the overflow pressure relief cylinder, and the slurry return pipe is connected with the overflow pressure relief cylinder;

the utility model has the following advantages:

(1) according to the utility model, mud of the cluster down-the-hole hammer is circularly discharged, a mud retaining wall ensures that a covering layer does not collapse, and casing follow-up is not required, so that a large-diameter ultra-deep covering layer rock-entering well hole can be constructed, the huge steel casing follow-up cost is avoided, a telescopic drill rod is matched with the down-the-hole hammer to drill hard rock, the construction speed is ultra-fast, the comprehensive construction cost is ultra-low, and the equipment is suitable for all rock-entering drilling projects;

(2) the utility model has small bit pressure, the bit pressure is provided by a drilling tool, the drill rod can not be pressurized, the length of the drill rod is not limited, the drilling depth is very deep, and the utility model can be used for the drilling construction of ultra-deep pile holes;

(3) the drilling pressure and the torque of the down-the-hole hammer are small, and the type of the drilling machine used in cooperation is small, so that the manufacturing cost of large-diameter ultra-deep well hole construction equipment is greatly reduced;

(4) the utility model has lower cost by changing the crawler crane into the down-the-hole hammer drill.

In conclusion, the drilling machine for the mud reverse circulation down-the-hole hammer provided by the utility model has the advantages that the manufacturing cost is low, the protective cylinder follow-up is not needed for the drilling of the covering layer, the speed of the telescopic drill rod matched with the down-the-hole hammer to drill the rock is ultra-high, the ultra-large diameter rock drilling hole of the ultra-deep covering layer can be constructed, and the comprehensive construction cost is ultra-low.

Drawings

FIG. 1 is a schematic view of the present invention in a configuration for a track crane;

FIG. 2 is a schematic structural diagram of a rotary drilling rig according to the present invention;

FIG. 3 is a schematic view of the external faucet of the present invention;

FIG. 4 is a schematic view of the multi-channel drill pipe joint structure of the present invention.

In the figure, 1-a cluster down-the-hole hammer, 2-a pile frame, 3-a power head, 4-a drill rod, 5-a mud pipe, 6-an air inlet and an air outlet pipe, 7-a steel wire rope, 8-a multi-channel drill rod joint, 9-an outer tap, 10-a drilling machine, 11-a rotary joint, 12-an outermost drill rod, 13-an inner drill rod, 14-an overflow pressure relief cylinder, 15-a mud return pipe, 16-a centralizing wheel, 17-a drill rod short joint, 18-a multi-channel elevator, 19-a central drill rod and 20-an outer drill rod.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the utility model will be clear and readily understood by the description.

With reference to the accompanying drawings: a mud reverse circulation down-the-hole hammer drill comprises a cluster down-the-hole hammer 1, a pile frame 2 power head 3, a drill rod 4, a slurry discharge pipe 5, an air inlet and exhaust pipe 6, a steel wire rope 7, a multi-channel drill rod joint 8, an external tap 9 and a drill 10;

the feeding force of the down-the-hole hammer drill bit can depend on the self weight of a drilling tool, the drill rod can not be pressurized, the torque required by the rotation of the drill bit is small, the rotating speed is very low, the power is small, and the down-the-hole hammer drill bit is suitable for drilling machines which are simply remanufactured by various crawler cranes; the remanufacturing content is as follows: increasing the single-rope lifting force of a main winch of the crane, installing a pile frame 2 and installing a power head 3; the modified down-the-hole hammer drill can rotationally drive the drill rod 4, lift and lower the drill rod 4 and collect the down-the-hole hammer 1, and has a comprehensive drilling function of a mud reverse circulation down-the-hole hammer drill by matching with air compressor equipment;

the power head 3 drives the drill rod 4 to drive the cluster down-the-hole hammer 1 to rotate; a steel wire rope 7 for lifting the drill rod 4 penetrates through the outer faucet 9 and the interior of the drill rod 4 and is fixed on a lifter in the multi-channel drill rod joint 8, so that the steel wire rope 7 is protected from being twisted by rotation of the drill rod;

high-pressure air enters an air inlet pipe in the air inlet and exhaust pipe 6, passes through the drill rod 4, enters the drill rod 4 through an opening at the top of an outer faucet 9, passes through an elevator inner rotary joint in a multi-channel drill rod joint 8, and then enters the cluster down-the-hole hammer 1 to drive the down-the-hole hammer to impact rock drilling; the elevator ensures that the air inlet pipe and the exhaust pipe 6 in the drill rod 4 cannot rotate and twist when the drill rod 4 rotates;

the outer cover of the single down-the-hole hammer in the cluster down-the-hole hammer 1 is wrapped with the outer cover, the collected down-the-hole hammer exhausts air to enter the exhaust channel of the cluster down-the-hole hammer 1 and is exhausted to the atmosphere through the multi-channel drill rod joint 8 and the air inlet and exhaust pipe 6, the bottom of the down-the-hole hammer does not exhaust air, the air cannot leak into drilling mud to cause hole collapse, meanwhile, the exhaust back pressure of the down-the-hole hammer is also reduced, and the down-the-hole hammer is kept to have the maximum energy efficiency;

injecting part of gas in the gas inlet and exhaust pipe 6 into a slag suction pipe in the cluster down-the-hole hammer 1 to form gas lift mud reverse circulation, wherein the mud carries drilling slag, enters the interior of a drill stem 4 through a channel between the inner wall of the drill stem in a multi-channel drill stem joint 8 and an elevator, enters a mud treatment system through an outer tap 9 and a mud discharge pipe 5, and returns to the drill hole to keep a water head to protect the hole wall from collapsing;

the method for extending and retracting the inner wall and the outer wall of the drill rod 4 is that an elastic sealing body is arranged on the outer wall of the top of the inner layer drill rod and forms sliding sealing with the inner wall of the outer layer drill rod;

the external tap 9 structurally comprises: the device comprises an air inlet and exhaust pipe 6, a steel wire rope 7, a rotary joint 11, an outermost layer drill rod 12, an inner layer drill rod 13, an overflow pressure relief cylinder 14, a slurry return pipe 15, a centralizing wheel 16 and a slurry discharge pipe 5; the rotary joint 11 is used for rotatably connecting the slurry discharge pipe 5 and the overflow pressure relief cylinder 14 with the top of the outermost drill rod 12 to ensure that the drill rod 4 rotates freely; the air inlet and exhaust pipe 6 and the steel wire rope 7 penetrate through the middle of the centralizing wheel 16 of the central through hole of the bottom plate of the overflow pressure relief cylinder 14, so that the air inlet and exhaust pipe 6 and the steel wire rope 7 are prevented from being abraded; the slurry return pipe 15 is connected with the overflow pressure relief cylinder 14, so that slurry leaked from the outer faucet 9 is exhausted and decompressed in the overflow pressure relief cylinder 14 and flows into the slurry return pipe 15 for recycling;

the slurry leaked from the opening at the top of the external faucet 9 through which the steel wire rope 7 and the air inlet and exhaust pipe 6 pass is discharged into the slurry return pipe 15 for recycling after being exhausted and decompressed in the overflow decompression cylinder 14, so that the pollution caused by the leaked slurry is avoided;

the multi-channel drill rod joint 9 structure comprises: the device comprises a central drill rod 19, an outer layer drill rod 20, an air inlet and exhaust pipe 6, a steel wire rope 7, a multi-channel elevator 18, a drill rod short joint 17 and a cluster down-the-hole hammer 1; the multi-channel elevator 18 is fixed in the short joint 17 of the drill rod, the air inlet and exhaust pipe 6 and the steel wire rope 7 are connected with the multi-channel elevator 18, and the air inlet and exhaust pipe and the steel wire rope are ensured not to rotate along with the drill rod 4; the drill rod short joint 17 is connected with the central drill rod 19 and the cluster down-the-hole hammer 1 in a square joint lock pin mode, and a mud channel is provided by a channel in the multi-channel drill rod joint; the multi-channel drill rod joint has a larger diameter, and the internal slurry passing sectional area is increased, so that the conventional middle and small-sized telescopic drill rod drilling machine can adopt slurry reverse circulation to complete the drilling construction of an oversized large-diameter ultra-deep covering layer;

in order to achieve the second purpose of the utility model, the utility model provides a using method of the rotary drilling rig of the mud reverse circulation down-the-hole hammer, which is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

the method comprises the following steps: assembling;

connecting an air inlet and exhaust pipe 6 and a steel wire rope 7 with an elevator in a multi-channel drill rod joint 8, and communicating the other end of the air inlet and exhaust pipe 6 with an air compressor;

connecting the drill rod 4 with a multi-channel drill rod joint 8 and the cluster down-the-hole hammer 1;

communicating the slurry discharge pipe 5 with an external tap 9 and a ground slurry treatment system;

step two: hoisting;

the wire rope 7 suspends the drill rod 4 and other drilling tools to the drilling station;

step three: drilling;

starting the power head 3 to drive the cluster down-the-hole hammer 1 to rotate;

starting an air compressor to supply air, enabling the cluster down-the-hole hammer 1 to impact rock drilling, injecting high-pressure air into a slurry discharge pipe in the cluster down-the-hole hammer 1 to form slurry air-lift reverse circulation, discharging drilling slag through a drill rod 4 and a slurry discharge pipe 5, and injecting the treated high-quality slurry back into a drill hole to realize slurry wall protection and realize drilling of the down-the-hole hammer on rock and soil;

synchronously lowering the steel wire rope 7 and the air inlet and exhaust pipe 6, so that the drill rod 4 is lowered while drilling until drilling is completed;

further, in the third step, when the drilled hole is a water-wet hole, high-pressure air is injected into a slag suction pipe in the cluster down-the-hole hammer 1, and mud carrying drilling slag is sucked in to form mud gas-lift reverse circulation slag discharge;

when the drill hole is a waterless dry hole, an air injection and suction device is arranged in a slag suction pipe of the cluster down-the-hole hammer 1, high-pressure air is injected, and drill slag is sucked to form air reverse circulation slag removal, so that the waterless dry hole sludge-free construction is facilitated;

when the drilling is shallow hole drilling, an air injection and suction device is arranged in an inner slag suction pipe of the cluster down-the-hole hammer 1, air is injected, slurry carrying drilling slag is sucked, reverse circulation slag removal of the slurry is formed, and reverse circulation drilling of the slurry is carried out when gas lift reverse circulation is ineffective under the condition of conveniently opening holes;

the drilling machine of the mud reverse circulation down-the-hole hammer has high drilling speed of hard rock, and still has high drilling speed by adopting a grading reaming or core drilling method during the large-diameter drilling construction, so that the drilling pressure and the torque of the drilling machine can be reduced, the model of the drilling machine 10 is reduced, the drilling pressure of the down-the-hole hammer construction is smaller, the drilling machine 10 can not be pressurized, the telescopic drill rod only needs to transmit the torque, and the drilling depth of the drill rod 4 is deeper than that of pressurized drilling; the mud reverse circulation down-the-hole hammer drill has a small model, has the drilling capability of drilling ultra-deep and ultra-large diameter hard rock, and is ultra-fast in drilling speed and ultra-low in comprehensive construction cost.

In order to more clearly illustrate the advantages of the mud reverse circulation down-the-hole hammer drill of the present invention compared with the prior art, the workers compare the three technical schemes, and the comparison results are as follows:

as can be seen from the above table, when the slurry reverse circulation down-the-hole hammer drill provided by the utility model is used for drilling a large-diameter deep and thick covering layer, compared with the prior art, the equipment is light and handy, the manufacturing cost is low, the rock drilling speed is high, and the construction cost is low.

Other parts not described belong to the prior art.

Claims (8)

1. The utility model provides a mud reverse circulation down-the-hole hammer rig which characterized in that: the device comprises a cluster down-the-hole hammer (1), a pile frame (2), a power head (3), a drill rod (4), a slurry discharge pipe (5), an air inlet and exhaust pipe (6), a steel wire rope (7), a multi-channel drill rod joint (8), an external tap (9) and a drilling machine (10);

the drill rod (4) is a multi-layer telescopic drill rod;

the outermost drill rod of the drill rod (4) is suspended on the power head (3) on the pile frame (2); the power head (3) drives the drill rod (4) to drive the cluster down-the-hole hammer (1) to rotate;

the steel wire rope (7) penetrates through the outer faucet (9) and the drill rod (4) and is fixed on an elevator in a multi-channel drill rod joint (8) between the drill rod (4) and the bundling down-the-hole hammer (1);

the multi-channel drill rod joint (8) is arranged between the drill rod (4) and the cluster down-the-hole hammer (1);

the air inlet and exhaust pipe (6) enters an outer tap (9) and a drill rod (4), passes through an elevator rotary joint in a multi-channel drill rod joint (8) and enters a down-the-hole hammer of the cluster down-the-hole hammer (1).

2. A mud reverse circulation down-the-hole hammer drill according to claim 1, wherein: the drilling machine (10) is a drilling machine using a telescopic drill rod or a drilling machine simply modified by a crawler crane, and the structure of the drilling machine modified by the crawler crane comprises the crawler crane, a pile frame (2) and a power head (3).

3. A mud reverse circulation down-the-hole hammer drill according to any one of claims 1-2, wherein: each single down-the-hole hammer on the cluster down-the-hole hammer (1) is provided with a closed outer sleeve, all exhaust of the collected down-the-hole hammers is discharged into an exhaust channel inside the cluster down-the-hole hammer (1), and the exhaust is discharged into the atmosphere through a multi-channel drill rod joint (8) and an air inlet and exhaust pipe (6), the bottom of the down-the-hole hammer is provided with no exhaust hole, the exhaust of the down-the-hole hammer cannot be discharged into mud in a pile hole, and a mud residue suction pipe is arranged in the cluster down-the-hole hammer (1).

4. A mud reverse circulation down-the-hole hammer drill according to claim 3, wherein: high-pressure air enters the air inlet and exhaust pipe (6), passes through the drill rod (4), passes through the elevator rotary joint in the multi-channel drill rod joint (8), and enters each single down-the-hole hammer on the cluster down-the-hole hammer (1).

5. A mud reverse circulation down-the-hole hammer drill according to claim 4, wherein: the slag suction pipe of the cluster down-the-hole hammer (1) is communicated with the multi-channel drill rod joint (8), the drill rod (4), the outer tap (9), the slurry discharge pipe (5) and the slurry processor.

6. A mud reverse circulation down-the-hole hammer drill according to claim 5, wherein: the structure of the external tap (9) comprises: the device comprises a steel wire rope (7), an air inlet and exhaust pipe (6), a rotary joint (11), an outermost layer drill rod (12), an inner layer drill rod (13), an overflow pressure relief cylinder (14), a slurry return pipe (15), a centralizing wheel (16) and a slurry discharge pipe (5); the rotary joint (11) is used for rotatably connecting the slurry discharge pipe (5) and the overflow pressure relief cylinder (14) with the top of the outermost drill rod (12), the steel wire rope (7) and the air inlet and exhaust pipe (6) penetrate through the middle of a centralizing wheel of a central through hole of a bottom plate of the overflow pressure relief cylinder (14), and the slurry return pipe (15) is connected with the overflow pressure relief cylinder (14).

7. A mud reverse circulation down-the-hole hammer drill according to claim 6, wherein: the multi-channel drill rod joint (8) structure comprises: the device comprises a drill rod short joint (17), a multi-channel elevator (18), an air inlet and exhaust pipe (6), a steel wire rope (7), a central drill rod (19), an outer layer drill rod (20) and a cluster down-the-hole hammer (1); the multi-channel elevator (18) is fixed in the short drill rod joint (17), the air inlet pipe, the exhaust pipe (6) and the steel wire rope (7) are connected with the multi-channel elevator (18), the short drill rod joint (17) is connected with the central drill rod (19) and the cluster down-the-hole hammer (1) in a square joint mode, and a mud channel is arranged in the space between the short drill rod joint (17) and the multi-channel elevator (18).

8. A mud reverse circulation down-the-hole hammer drill according to claim 7, wherein: during the drilling process of the geological with the covering layer by using the mud reverse circulation down-the-hole hammer drill, the hole wall is protected by adopting a mud wall protection method without the need of a pile casing to follow.

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