KR101186230B1 - Large diameter auger machine - Google Patents

Abstract

The present invention relates to a large-diameter auger excavation apparatus, which is installed to be movable up and down along a slide guide rod that is attached in parallel to the vertical direction on one side of the leader installed vertically fixed on the ground or water surface to perform excavation operation. Multi-auger drill to drill a large diameter pile hole with an upper auger drive unit having a drilling rod connected to one or more stages, a lower auger drive unit to which a casing rod is connected to one or more stages, and a plurality of small diameter hammer drills. In the large-diameter auger excavation apparatus comprising a device,
The pneumatic and water supplied from the outside through a plurality of supply passages formed on the rotary shaft of the upper auger drive unit can be supplied to the multi-hammer drill apparatus through a plurality of supply pipes formed in the excavating rod, Slime formed by mixing water which is supplied to the bottom of the drill bit of each of the plurality of small diameter hammer drills formed to cool frictional heat generated when the rock strikes and the rock powder which is broken by the blow operation of each drill bit is formed on the rotary shaft The air can be discharged through the slime discharge passage and the air pressure that reciprocated the ram of each of the plurality of small diameter hammer drills up and down can be discharged to the air between the upper and lower auger drive units to be decomposed to the air. And, the other generated when the blow operation of the plurality of small diameter hammer drill In order to prevent the vibration from being transmitted to the upper auger drive unit, the upper auger drive receives the rotational power of the motor from the upper auger drive so as to block the vibration by absorbing and mitigating the upper auger drive unit. The invention is characterized in that it further comprises a buffer interposed between the top of the excavating rod protruding into.

Description

Large Diameter Auger Excavator {Large diameter auger machine}

The present invention relates to a large-diameter auger excavation device, and more particularly, to the bottom of the multi-hammer drill device to cool the drill bit frictional heat of each of the plurality of small diameter hammer drill formed in the multi-hammer drill device when drilling a large diameter rock The slime formed by mixing water and rock powder destroyed by the above-mentioned drill bit operation is sucked into the slime suction pipe formed in the multi-hammer drill device and sent to the designated place on the ground along with the air pressure sprayed upward. The pneumatic pressure supplied to operate the diameter hammer drill is U-turned inside the cylindrical case of the multi-hammer drill device to be air-decomposed from the ground through a plurality of pneumatic discharge pipes formed in the excavating rod, thereby contaminating the large diameter ground excavation site with dust or slime. Of large diameter auger excavator A.

Conventional large-diameter auger excavation device was used in the same function as a large diameter hammer drill as a method of combining several small diameter hammer drill, which is developed by the inventor of the present invention and proposed in the prior art patent No. 056296 It is introduced in detail in issue.

The prior art is to supply the pneumatic pressure supplied from the outside to each of the plurality of hammer drills so that each of the plurality of hammer drills hit the rock repeatedly and continuously by the pneumatic pressure supplied individually, each hammer drill After the hammer hits the rock, the hammer is ejected to the bottom of each hammer drill.The pneumatics ejected after each hammer drill strikes the plurality of hammer drills together with the rock powder destroyed by the hammer force. The discharge pipe formed at the center of the upper plate to which the drilling rod is connected after being raised above the multi-hammer drill case through a gap formed between the outer circumferential surface of the multi-hammer drill case and the drilling hole (pile ball). Dust extraction tank, etc. mounted on the dump truck and discharged to the clay hose through the discharge pipe of the above-mentioned excavation rod It is to be collected.

However, the prior art as described above, each hammer drill to the pneumatic pressure used in the hammer operation of each hammer drill to cool the frictional heat generated when the plurality of hammer drills break the rock by the blow operation and to raise the rock powder simultaneously destroyed Since it is configured to eject to the bottom, when the pneumatic pressure discharged from the bottom of the plurality of hammer drills is moved up together with the rock powder generated when the rock strikes, the whole amount cannot be discharged to the discharge pipe line formed in the excavation rod, and some of them are multi-hammers. The phenomenon of discharge to the ground appears along the gap (space) formed between the drill case and the excavation hole, which caused a problem that the periphery of the ground excavation construction site is contaminated with dust.

In addition, the conventional technology is pointed out that the impact vibration generated when a plurality of hammer drill hit the rock is transmitted to the auger drive unit through the excavation rod, so that the auger drive unit is not only broken easily but also shortened the service life. Has been.

The present invention has been proposed in order to solve the problems described in the prior art as described above, a plurality of small diameter in the construction of a large diameter multi-hammer drill for drilling a large diameter drilling hole by combining a plurality of small diameter hammer drill The pneumatic pressure supplied to each of the plurality of small diameter hammer drills to reciprocate the hammer drills individually reciprocates the ram of each hammer drill up and down and does not discharge to the outside. U-turn inside the case allows air to be decomposed from the ground through a plurality of pneumatic discharge pipes formed in the excavating rod, so that the ground cause of contamination of the rock dust destroyed by each small diameter hammer drill can be blocked in advance. Also, by supplying water to the plurality of small diameter hammer drills individually, It cools the frictional heat generated from the drill bit and discharges the slime mixed with rock powder and water to the designated place on the ground through the slime discharge passage formed in the excavating rod, and also the blow operation of the plurality of small diameter hammer drills described above. The invention has been invented for the purpose of remarkably extending the service life of the auger drive unit without causing the auger drive unit to be absorbed by the upper end of the excavating rod without being transmitted to the auger drive unit.

The present invention, as a means for realizing the above object,

An upper auger that is installed at one or more stages of excavation rods that are installed to move up and down along slide guide rods that are vertically and parallelly attached to one side of the leader installed vertically high above the ground or water surface. A large-diameter auger excavation device comprising a drive unit, a lower auger drive unit to which casing rods are connected in one or more stages, and a multi-hammer drill device for drilling a large diameter pile hole with a plurality of small diameter hammer drills. In

The pneumatic and water supplied from the outside through a plurality of supply passages formed on the rotary shaft of the upper auger drive unit can be supplied to the multi-hammer drill apparatus through a plurality of supply pipes formed in the excavating rod, Slime formed by mixing water which is supplied to the bottom of the drill bit of each of the plurality of small diameter hammer drills formed to cool frictional heat generated when the rock strikes and the rock powder which is broken by the blow operation of each drill bit is formed on the rotary shaft The air can be discharged through the slime discharge passage and the air pressure that reciprocated the ram of each of the plurality of small diameter hammer drills up and down can be discharged to the air between the upper and lower auger drive units to be decomposed to the air. And, the other generated when the blow operation of the plurality of small diameter hammer drill In order to prevent the vibration from being transmitted to the upper auger drive unit, the upper auger drive receives the rotational power of the motor from the upper auger drive so as to block the vibration by absorbing and mitigating the upper auger drive unit. Characterized in that it further comprises a buffer interposed between the top of the excavating rod protruding into.

In addition, the shock absorber is formed with an upper body having a top flange detachably connected to the lower end of the rotating body of the upper auger drive unit, and a lower flange connected to an upper side of the excavating rod protruding upward of the lower auger drive unit. Consists of a lower body inserted into the upper body, the upper and lower bodies are connected and coupled by a pair of coupling pins in the state, the inner and outer buffer is interposed, the upper and lower flanges of the upper and lower bodies Each of the plurality of supply passages formed in the rotating shaft and a plurality of connecting tubes for connecting the plurality of supply pipes formed in the drilling rod is characterized in that it is provided.

In addition, a lower flange formed on the lower body of the shock absorber and the upper end of the excavating rod is provided with a joint member, the joint member has a plurality of connecting end pipes connecting a plurality of connecting tubes formed in the shock absorber and a plurality of supply pipes formed in the excavating rod And a plurality of pneumatic discharge chambers and a plurality of pneumatic discharge holes for discharging the air pressure discharged from the plurality of pneumatic discharge pipes formed in the drilling rod to the outside.

In addition, the multi-hammer drill device has a cylindrical case in which a plurality of small diameter hammer drills are mounted, first to fifth connection passages connected to each of a plurality of supply pipes and a plurality of pneumatic discharge pipes formed in the excavating rod, and a plurality of pneumatic discharges. An intermediate case having a rod connecting portion having a passage formed therein, a plurality of pneumatic connecting tubes connecting the first to third connecting passages formed in the rod connecting portion, and the plurality of small diameter hammer drills, and the plurality of small diameter hammers. A lower case mounted at a lower end of the cylindrical case so that each drill bit of the drill protrudes downward, a plurality of slime suction holes formed in the lower case for sucking slime generated at the bottom of the lower case, and the plurality of suction holes; A plurality of slime suction pipe is installed in the cylindrical case so as to be connected, the lower end of the plurality of slime suction pipe It is connected to the upper end of the upper end is characterized in that it has a plurality of suction extension tube formed to connect with the slime discharge injection passage formed in the center of the rod connection.

In addition, the multi-hammer drill device is a water supply pipe connected to the fifth connection passage of the first to fifth connection passages formed in the rod connecting portion extending to the upper surface of the lower case, a plurality of branches formed in the lower case branched from the water supply pipe Bypass pipe connected to the water spray hole of the one end is connected to the fourth connecting passage formed in the rod connecting portion and the other end is located under the slime discharge injection passage of the rod connecting portion to inject a high pressure pneumatic pressure from the lower side to the upper side An injection pipe is provided.

In addition, the multi-hammer drill device to the upper and lower rams in each drill bit of each of the plurality of small diameter hammer drill in order to discharge the air by U-turn inside the cylindrical case that hits each of the plurality of small diameter hammer drill. Pneumatic discharge holes for discharging the high pressure reciprocating into the cylindrical case, and a plurality of pneumatic discharge connection passages are formed between the cylindrical case and the intermediate case to move the pneumatic discharged to the cylindrical case into the intermediate case, Lower ends of each of the plurality of pneumatic discharge passages formed between the first to fifth connection passages of the rod connecting portion are formed to be exposed to the intermediate case such that the air pressure moved into the intermediate case is airborne through the plurality of pneumatic discharge passages. Characterized in that configured to be discharged to.

According to the present invention, when a large diameter pile drilling is performed on a solid ground or rock, water is supplied to the bottom of each drill bit of a plurality of small diameter hammer drills constituting the multi-hammer drill device to cool the friction heat of the drill bit. At the same time, the suction force of the pneumatic jetting upward from the lower side of the slime discharge connecting passage formed at the center of the rod connecting portion sucks the slime mixed with water and rock powder from the bottom of the drill bit and discharges it to the designated place on the ground. The drill bit of each of the plurality of small diameter hammer drills is formed on the drilling rod by U-turning inside the cylindrical case of the multi-hammer drill device without discharging the pneumatic pressure that is reciprocated up and down to the bottom of each drill bit. Discharge into the air between the upper and lower auger drive units through a plurality of pneumatic discharge lines It is effective to prevent dust from being generated around the pile ball on the ground, and the multi-hammer drill device can reduce the vibration of the hammer as well as the multiple hammer drills hit the rock individually. Since the impact vibration generated when the small-diameter hammer drill strikes is absorbed and relieved by the shock absorber, the rotation axis of the upper auger drive unit is not affected by the impact vibration, thereby reducing the failure rate of the large-diameter auger excavator and further improving the service life. The advantage is that it can be extended.

1 is a state diagram used in large diameter auger excavation apparatus for explaining the present invention,
Figure 2 is an assembled state cross-sectional view of the upper auger drive unit of the large-diameter auger excavation device of the present invention,
3 is a cross-sectional view of the connection state of the shock absorber and the coupling member mounted between the upper auger drive unit and the upper auger drive unit of the present invention;
4 is a cross-sectional view taken along the line AA of FIG.
5 is a cross-sectional view taken along the line BB of FIG.
Figure 6 is a cross-sectional view of the excavation rod connected to the rotary shaft of the upper auger drive unit of the present invention,
7 is a cross-sectional view of the operating state of the water jet passage for ejecting water to the bottom of the drill bit of the small-diameter hammer drill mounted on the multi-hammer drill device of the present invention and the pneumatic jet passage for injecting pneumatic pressure into the slime discharge passage;
8 is a cross-sectional view taken along line CC of FIG. 7,
9 and 10 are operating state diagrams showing a state in which the ram of the small diameter hammer drill shown in the cross-sectional view taken along the line DD of FIG.

Detailed embodiments of the large-diameter auger drilling apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 denotes an upper auger drive unit, and 2 denotes a lower auger drive unit.

The upper and lower auger drive units (1) and (2) are installed to be moved up and down along guide rods fixedly attached in parallel to a leader fixed vertically by a crawler crane moving freely from the ground. do.

The upper auger drive unit 1 includes two motors 11 and 12 and a planetary gear reducer 13 integrally formed at each of the lower parts of the motor in order to reduce the rotational output of the respective motors at an appropriate ratio. 14, the drive gears (15) and (16), which are fixed to the deceleration output shafts of the planetary gear reducers (13) and (14), and receive the reduced rotation output from the drive gears (15) and (16). The rotating shaft 3 is provided so that it may be installed.

The rotary shaft 3 is vertically installed between two motors 11 and 12, and one interlocking gear 30 engaged with the drive gears 15 and 16 is fitted at the lower end thereof. In addition, the rotary shaft (3) is installed in a state surrounding the outer periphery of the rotary shaft (3) in a state in which a plurality of swivel (4a ~ 4e) is stacked up, down, the plurality of swivel (4a ~ 4e) is a rotary shaft (3) While being fixed while being wrapped around the outer periphery of the rotary shaft 3 is configured to rotate with the reduced output received from the planetary gear reducer (13) (14).

A slime discharge passage 31 is formed at the center of the rotary shaft 3, and a plurality of supply passages 32a to 32e are formed at regular intervals based on the slime discharge passage 31. Each of the plurality of supply passages 32a to 32e has an annular passage 41 and an injection hole 42 connected to each of the plurality of swivels 4a to 4e which are fixed to the outer circumference of the rotary shaft 3. Consists of.

Therefore, the pneumatic and water flowing into the annular passage 41 through each injection hole 42 formed in the plurality of swivels 4a to 4e are provided through the plurality of supply passages 32a through the respective swivels 4a to 4e. ～ 32e) It is supplied to each. For example, when the water supply hose 44e is connected to the injection hole 42 of the swivel 4e at the bottom of the plurality of swivels 4a to 4e to supply water, the swivel 4e described above. The water flowing into the annular groove 41 through the injection hole 42 of the) is supplied to the supply passage (32e), the injection hole of each of the swivel (4a ~ 4d) for each of the pneumatic supply hose (43a ~ 43d) In case of supplying air pressure by connecting to 42, the air pressure supplied to each of the annular grooves 41 through the injection holes 42 formed in the swivels 4a to 4d, respectively, is respectively supplied to the supply passages 32a to 32d. (See Figure 2).

And the lower auger drive unit 2 is casing which is formed integrally with each of the two motors and rotates to the output decelerated by the deceleration output shaft of the planetary gear reducer which decelerates the rotational output of the motor at a set ratio. The rod 22 is provided.

The upper end of the casing rod 21 is connected to receive the decelerated rotation output from the lower auger drive unit 2 in a state rotatably inserted into the casing 22, the casing rod 21 Excavation rod 23 is inserted into the installation is connected to the rotating shaft 3 of the upper auger drive unit 1, the casing rod 21 and the excavating rod 23 is configured to rotate in the opposite direction have. For example, when the excavating rod 23 connected to the rotary shaft 3 is configured to rotate in the forward direction (clockwise), the casing rod 21 connected to the upper auger drive unit 2 is in the reverse direction (counterclockwise). To rotate).

The casing rod 21 connected to the lower auger drive unit 2 configured as described above and the excavation rod 23 rotatably inserted into the casing rod 21 are used as is. Since it is used, a detailed description thereof will be omitted.

The casing rod 21 and the excavating rod 23 is a structure that is connected and assembled in more than one stage, respectively, to proceed with the ground excavation operation.

On the other hand, the lower end of the drilling rod 23 connected to the rotary shaft 3 of the lower auger drive unit 2 in one or more stages is equipped with a multi-hammer drill device 5, the multi-hammer drill device 5 Based on the invention of Patent No. 0156296 proposed by the inventor of the present invention, the structure is newly developed to be different from the above-described patent invention.

For example, in the multi-hammer drill apparatus introduced in the above-mentioned Patent No. 05629696, the broken rock powder is discharged by a pneumatic method, but in the present invention, water is mixed into the rock powder to be destroyed by supplying water to slime. While making the pump to suck the slime by the pumping operation using the pneumatic bar, a detailed description thereof will be described later.

A characteristic of the present invention is that the lower end of the rotating body (3) rotates at a reduced rotational output from the upper auger drive unit (1) and the casing rotating body (21) inside the lower auger drive unit (2) upwards. The air pressure supplied through some of the swivels 4a to 4c of the plurality of swivels 4a to 4e interposed between the upper ends of the excavating rod 23 installed to protrude is formed in the upper auger drive unit 1 is excavated Cylindrical case 55 after being supplied to a plurality of small diameter hammer drills 51 formed in the multi-hammer drill device 5 through a plurality of supply pipes 24 formed in the rod 23 to strike the drill bit 52 The U-turn inside allows air to be discharged into the air between the upper and lower auger drive units (1) and (2), while the pneumatic pressure supplied to the swivel (4d) of the other two swivels (4d to 4e) is multi-hammer. Slot formed in the rod connection part 55a of the drill apparatus 5 Injected upward from the lower side of the lime discharge connection passage 58 to inhale the slime to be discharged to the ground, and the water supplied to the other swivel 4e is each of the plurality of small diameter hammer drills 51. It is ejected toward the bottom of the drill bit (52) of the cooling bit of the friction bit of each drill bit (52) and mixed with water to make the crushed rock powder to make a slime, and also the plurality of small diameter hammer drill ( It is provided with a shock absorber (6) for absorbing and relaxing in the middle so that the blow vibration generated during the individual blow operation of the 51) is not transmitted to the rotary shaft (3) of the upper auger drive unit (1).

To this end, the shock absorber 6 is inserted into the casing rod 21 of the lower auger drive unit 2 and the lower end of the rotary shaft 3 of the upper auger drive unit 1 as shown in FIGS. 2 and 3. It is assembled in a structure interposed between the upper end of the excavating rod 23 installed to protrude upward of the lower auger drive unit (2) in the installed state, the slime discharge passage of the rotary shaft (3) ( The slime discharge guide passage 60 is connected to the 31 is formed.

In addition, the shock absorber 6 has an upper body 6a having an upper flange 61 screwed to a lower end of the rotation shaft 3 and a lower flange 62 for connecting to an upper side of the excavation rod 23. Is formed as a lower body (6b) is inserted into the upper body (6a), and each of the upper and lower body (6a) (6b) are two coupling pins (as shown in Figures 3 and 4) 63 is detachably coupled to the pin insertion hole 64 formed on the outer circumference of the upper body 6a so that the radius of the coupling pin 63 fits snugly and the outer circumference of the lower body 6b. The pin insertion hole 65 formed in the is formed slightly larger than the radius of the coupling pin (63). Therefore, the lower body 6b is buffered by the play formed by the pin insertion hole 65 formed larger than the radius of the coupling pin 63.

That is, the shock absorber 6 is between the upper end of the lower body 6b and the upper flange 61 of the upper body 6a and the lower flange 62 of the lower end of the upper body 6a and the lower body 6b. Since the inner and outer shock absorbers 66 and 67 are interposed therebetween, the impact vibration generated when the small-diameter hammer drill 51 strikes is transmitted to the lower body 6b of the shock absorber 6 through the excavation rod 23. Is transmitted directly to the shock absorber 6b, and the lower body 6b is transmitted to the shock absorber 6 in the process of elastically compressing the inner and outer shock absorbers 66 and 67 by the clearance formed by the pin insertion hole 65. The vibration is absorbed and relaxed.

Therefore, the impact vibration generated whenever the small diameter hammer drill 51 strikes the rock is absorbed and relaxed by the shock absorber 6, so that the impact of the impact vibration does not affect the rotating shaft 3 of the upper auger drive unit 1. will be.

In addition, the inner buffer material 66 is not exposed to the slime discharge guide passage 60 on the upper end of the lower body 6b of the shock absorber 6 while the lower body 6b repeats the upper and lower shock absorbing operations. A shock absorbing material protection tube 66a is formed to block the shock absorbing material 66 from protruding into the slime discharge guide passage 60.

In addition, the upper and lower flanges 61 and 62 of the shock absorber 6 have a plurality of pneumatics and water introduced through the plurality of swivels 4a to 4e formed on the rotation shaft 3 to the excavating rod 23. A plurality of connecting tubes 68 for supplying to the supply pipe 24 are provided.

The upper and lower ends of the plurality of connection tubes 68 are connected to upper and lower connection holes 69a and 69b formed in a plurality of upper and lower flanges 61 and 62, respectively.

In addition, the plurality of upper connection holes 69a formed on the upper flange 61 are connected to each of the plurality of supply passages 32a to 32e formed on the rotation shaft 3, and a plurality of upper connection holes 69a formed on the lower flange 62. Lower connection holes 69b are connected to each of the plurality of supply pipes 24 formed in the excavation rod 23.

Another feature of the present invention, between the lower body (6b) and the upper end of the drilling rod 23 of the shock absorber 6 through the plurality of pneumatic discharge pipe 25 formed in the drilling rod 23 is air It is provided with the joint member 7 discharged | emitted and air-decomposed.

To this end, at the center of the joint member 7 is a slime discharge connecting passage 70 for connecting the slime discharge guide passage 60 and the slime discharge pipe 26 formed at the center of the excavating rod 23 of the shock absorber 6. And an upper flange 71 coupled to a lower flange 62 formed on the lower body 6b of the shock absorber 6 and a lower flange 72 coupled to an upper end of the excavating rod 23, respectively. Formed.

In addition, each of the upper and lower flanges 71 and 72 has a plurality of lower connection holes 69b connected to the lower ends of the plurality of connection tubes 68 formed on the shock absorber 6 and a plurality of excavation rods 23. A plurality of connecting end pipes 73 for connecting the supply pipes 24 are formed.

In addition, the lower flange 72 of the joint member 7 is formed with a plurality of pneumatic discharge connection holes 74 are connected to each of the plurality of pneumatic discharge pipe 25 formed in the excavating rod (23).

In addition, the coupling member 7 includes a plurality of diaphragms 75 radially spaced apart by a predetermined angle between the upper and lower flanges 71 and 72 and a plurality of arc plates 76 connecting the diaphragms 75. A plurality of chambers partitioned by a plurality of chambers, and a plurality of arc plates 76 formed in the plurality of pneumatic discharge chambers 77 formed between the chambers in which the plurality of connection end tubes 73 are installed. ), Each pneumatic discharge hole (78) is drilled one by one.

As described above, the shock absorber 6 and the coupling member 7 connecting the rotary shaft 3 of the upper auger drive unit 1 and the upper end of the excavation rod 23 are concealed and protected by the protection cylinder 8. A plurality of pneumatic dispersions for dispersing and discharging the pneumatic discharged through the pneumatic discharge hole 78 of the joint member 7 in the partition plate 81 partitioning the inside of the protective cylinder 8 up and down The discharge hole 82 is formed.

The protective cylinder 8 is provided with a discharge port 83 for discharging air to the air.

Another feature of the present invention is to improve the structure of the multi-hammer drill device 5 to enable the reciprocating operation inside the cylinder 53 to strike the drill bit 52 of each of the plurality of small diameter hammer drills 51. A plurality of pneumatic discharge pipes 25 in which the pneumatic air reciprocating the mounted ram 54 up and down U-turns inside the cylindrical case 55 of the multi-hammer drill device 5 and are connected to the excavation rod 23. It is configured to be discharged into the air between the upper and lower auger brave unit (1) (2) through the), and also drill of each of the plurality of small diameter hammer drill (51) mounted on the multi-hammer drill device (5) Water is supplied to the bottoms of the bits 52 to cool the frictional heat of the drill bit 52, and at the same time, the broken rock powder is mixed with water, and then, through the slime discharge pipe 26 formed in the drilling rod 23 using pneumatic pressure. It is configured to discharge to a designated place on the ground.

To this end, the multi-hammer drill device (5) is a cylindrical case 55, a rod connecting portion (55a) is located on the upper side of the excavating rod 23 and the rod connecting portion and the cylindrical case (55) Intermediate case 55b for connecting the lower case 55c formed at the lower end of the cylindrical case 55 is formed.

In addition, the rod connecting portion 55a of the multi-hammer drill apparatus 5 includes first to fifth connecting passages 56a to 56e connected to a plurality of pneumatic supply pipes 24 formed on the excavating rod 23, and a plurality of pneumatic pressures. A plurality of pneumatic discharge passages 57 connected to the discharge hole 25 and a slime discharge injection passage 58 connected to the slime discharge pipe 26 are provided (see FIG. 7), and also inside the intermediate case 55b. In the upper portion of the first to third connection passages (56a, 56b, 56c) selected from the first to fifth connection passages (56a to 56e) formed in the rod connection portion 55a and a plurality of small diameter hammer drills (51) A plurality of pneumatic connection tube 56 for connecting the pipe is connected, the water supply pipe (9a) connected to one of the fifth connection passage (5e) selected from the first to fifth connection passages (56a to 56e) is It extends to the upper surface of the lower case 55c of the cylindrical case 55.

In addition, the lower case 55c is provided with a plurality of water spray holes 91 to spray water toward the bottom of the drill bit 52 of each of the plurality of small diameter hammer drills 51. The water injection holes 81 are connected to the lower end of the water supply pipe (9a) to receive water from the water supply pipe (9a) by the bypass pipe (92).

In addition, the lower case 55c of the multi-hammer drill device 5 sucks the slime formed by mixing the water sprayed from the plurality of water injection holes 91 and the broken rock powder by the blow operation of the plurality of drill bits 52. A plurality of slime suction holes 93 are formed, and each of the slime suction holes 93 is connected to a lower end of each of the slime suction tubes 94 mounted in the cylindrical case 55. (See Figure 10)

In addition, an upper end of each of the plurality of suction pipes 94 is connected to a lower end of each of the plurality of suction extension pipes 95 mounted on the intermediate case 55b of the multi-drill device 5, and the plurality of suction extension pipes 95 Each upper end is connected to a slime discharge connecting passage 58 formed in the rod connecting portion 55a (see Fig. 10).

In addition, the multi-hammer drill apparatus 5 is connected to one of the selected passages selected from the first to fifth connection passages 56a to 56e formed on the rod connection portion 55a, that is, the fifth connection passage 56e to slime discharge injection. A pneumatic jet tube 9b is mounted to inject air pressure upward from the bottom of the passage 58 to generate suction force for sucking slime inside the slime discharge injection passage 58 (see FIG. 10).

On the other hand, since the plurality of small diameter hammer drills 51 mounted on the multi-hammer drill device 5 uses a conventional hammer drill, a detailed configuration of the small diameter hammer drill will be omitted in the present invention. . However, each of the small diameter hammer drills 51 in the present invention may discharge the pneumatic pressure, which reciprocates the ram 54 up and down, into the cylindrical case 55. The pneumatic discharge hole 96 formed in each of the drill bits 52 is configured to be located inside the cylindrical case 55. (See FIGS. 8 and 9)

The operation of the large-diameter auger drilling apparatus of the present invention configured as described above will be described.

The multi-hammer drill device 5 is assembled to the lower end of the drilling rod 23 that rotates at a reduced rotational output, such as the rotary shaft 3 formed on the upper auger drive unit 1, and rotates at a reduced rotational speed while drilling operation. In this case, the drill bit 52 of the plurality of small-diameter hammer drills 51 mounted on the multi-hammer drill device (5) is an operation of repeatedly hitting the rock while moving up and down the pile In this case, the multi-hammer drill apparatus 5 is supplied with pneumatic and water through the first to fifth connection passages 56a to 56e formed in the rod connection portion 55 to pierce the rock and slime. The operation of discharging the gas proceeds simultaneously.

For example, each of the plurality of small-diameter hammer drills 51 mounted on the multi-hammer drill device 5 receives the pneumatic pressure from the pneumatic supply hoses 43a, 43b, 43c installed on the ground. The fourth connection passage 56d, which is connected to the passages 56a, 56b, and 56c and receives air pressure from the pneumatic supply hose 43d installed on the ground, is connected to the pneumatic injection pipe 9b, and the water installed on the ground The fifth connection passage 56e receiving water from the supply hose 45e performs rock drilling and slime discharge operation of the plurality of small diameter hammer drills 51 under the assumption that the fifth connection passage 56e is connected to the water supply pipe 9a. Let's explain.

First, the excavation operation of the plurality of small diameter hammer drills 51 will be described. The pneumatic pressure supplied from the pneumatic supply hoses 43a, 43b and 43c installed on the ground is the swivels 4a, 4b and 4c → the supply passage 32a. , 32b, 32c → three connecting tubes 68 formed in the shock absorber 6 → three supply pipes 24 formed in the excavating rod 23 → first to third connecting passages 56a formed in the rod connecting portion 55a. , 56b and 56c are supplied to each of the plurality of small diameter hammer drills 51, and the pneumatic pressure supplied to each of the plurality of small diameter hammer drills 51 is opened by opening a one-way check valve (not shown). 53) When the ram 54 is raised as shown in FIG. 8, the pneumatic pressure flowing into the cylinder 53 acts to lower the ram 54. When 54 is lowered as illustrated in FIG. 9, the pneumatic pressure flowing into the cylinder 53 raises the ram 54. It is to act as a flavor. And when the ram 54 is lowered, the pneumatic pressure present in the lower side of the ram 54 is discharged into the cylindrical case 55 through the pneumatic discharge hole 96, and also when the ram 54 is raised The pneumatic pressure present on the upper side of the 54 is also discharged through the pneumatic discharge hole 96 so that the lifting operation of the ram 54 is smoothly performed, and thus the ram 54 repeatedly drills the drill bit 52. In addition, the drill bit 52 is to drill while drilling at the rock by rotating at a reduced rotational speed, such as the multi-hammer drill device 5 is to excavate the pile hole in the operation.

Next, the action of discharging the slime formed by mixing water and rock powder at the bottom of the lower case 55c of the multi-hammer drill apparatus 5 will be described.

As described above, even when each drill bit 52 performs a rock drilling operation by pneumatic pressure supplied to each of the plurality of small diameter hammer drills 51, the pneumatic supply hose 43d and the water supply hose 43e installed on the ground are installed. Pneumatic and water are supplied to the multi-hammer drill device (5), wherein the water supplied from the water supply hose (43e) is one connecting tube formed in the swivel (4e) → supply passage (32e) → shock absorber (6) 68) is supplied to the water supply pipe (9a) installed inside the cylindrical case (55) through one supply pipe (24) → the fifth connecting passage (56e) formed in the excavating rod (23), to the water supply pipe (9a) The supplied water is injected into the plurality of water spray holes 91 through the bi-bath tube 92, wherein the water sprayed into the plurality of water spray holes 91 occurs when each drill bit 52 breaks the rock. While cooling the frictional heat to be mixed with the broken rock powder by the striking operation of each drill bit 52 At the same time, the pneumatic pressure supplied through the pneumatic supply hose (43d) is a swivel (4d) → supply passage (32d) → one connecting tube 68 formed in the shock absorber (6) excavating rod (23) It is discharged through one supply pipe 24 formed in the fourth connecting passage (56d) → pneumatic injection pipe (9b), wherein the air pressure discharged from the pneumatic injection pipe (9b) is formed in the center of the rod connecting portion (55a) Since it is injected at a high pressure from the lower side to the upper side of the slime discharge injection passage 58, the suction force is generated in the slime discharge injection passage 58, and thus the suction force generated inside the slime discharge injection passage 58 in this way. The slime formed by mixing water and rock powder at the bottom of the lower case 55c of the multi-hammer drill device 5 is sucked into the plurality of slime suction holes 93, and the slime discharge injection passage through the slime suction pipe 94. Ball sucked into 58 The slime discharge tube (33) connected to the slime discharge passage (31) formed in the rotary shaft (3) is transferred to the slime discharge pipe (26) formed in the excavating rod (23), such as pneumatically injected from the injection pipe (9b) at high pressure. It is discharged to a designated place on the ground.

The slime discharge operation as described above is to proceed continuously as the operation of drilling a plurality of small diameter hammer drill 51 rock.

On the other hand, the pneumatic pressure supplied to the plurality of small diameter hammer drill 51 formed in the multi-hammer drill device 5 is the cylindrical case 55 through the pneumatic discharge hole 96 after raising and lowering the ram 54 up and down The air pressure discharged into the pneumatic discharge hole 96 is a plurality of pneumatic discharge connection passages 97 (see FIGS. 8 and 9) connecting the cylindrical case 55 and the intermediate case 55b. The first to fifth connection passages 56a to 56e of the rod connecting portion 55a connected to the upper end of the intermediate case 55b are moved to the inside of the intermediate case 55b through only one pneumatic discharge passage is shown in the drawing. The plurality of pneumatic discharge pipes 57 formed between the lower end of the state is exposed to the inside of the intermediate case (55b).

Therefore, the pneumatic discharged through the pneumatic discharge hole 96 of the plurality of small diameter hammer drill 51 is U-turned in the cylindrical case 55 to move to the intermediate case 55b through the pneumatic discharge connection passage 97. And then the plurality of pneumatic discharge pipes (25) formed in the excavating rod 23 through the plurality of pneumatic discharge passage (57) formed in the rod connecting portion (55a) between the upper, lower auger drive unit (1) (2) It is discharged to the air through the discharge port 83 of the protective cylinder (8) installed in.

As described above, the pneumatic pressure discharged through the discharge port 83 of the protective cylinder 8 is a clean air pressure that reciprocates the ram 54 up and down, so that the large diameter ground excavation site is not polluted.

In addition, the multi-hammer drill device 5 rotates with the excavation rod 23 while each of the drill bits 52 are rocked when the plurality of small-diameter hammer drills 51 drills the rock. The impact vibration generated each time hitting is transmitted to the excavation rod 23, and thus the impact vibration transmitted to the excavation rod 23 is absorbed and relaxed in the shock absorber 6 connected to the upper end of the excavation rod 23. It is not transmitted to the rotating shaft 3 of the upper auger driver unit 1. The impact vibration transmitted to the joint member 7 connected to the upper end of the drilling rod 23 is lower body 6b of the shock absorber 6 directly connected to the upper end of the joint member 7 and the lower body. This is because the inner and outer shock absorbers 66 and 67 interposed between the upper body 6a coupled to the coupling pin 63 to the 6b absorb and mitigate the impact vibration.

As described above, the large-diameter auger excavation device of the present invention uses a plurality of small diameter hammer drills 51 formed on the multi-hammer drill 5 to carry out the ground excavation work in a partial force method, thereby reducing the impact vibration. In addition, it is possible to reduce the failure rate by preventing the blow vibration from being transmitted to the rotary shaft 3 of the upper auger drive unit 1, and also pneumatically to the bottom of the drill bit 52 of each of the plurality of small diameter hammer drills 51 The axial shaft 3 of the upper auger drive unit 1 by sucking and releasing water and sucking the slime mixed with water and rock powder into the slime suction passage formed in each hammer drill 51 while cooling the frictional heat of the drill bit 52. The slime discharge tube (33) connected to the upper can be discharged slime to a predetermined place on the ground, and also operated the plurality of small diameter hammer drills (51) U-turn inside the cylindrical case 55 is discharged into the air by the U-turn is a useful invention having the feature that the dust is not generated in the large diameter ground excavation site.

1: Upper Auger Drive Unit 11, 12: Motor
13,14: Planetary gear reducer 15,16: Drive gear
2: lower auger drive unit 21: casing rod
22 Casing 23 Excavation Rod
24: pneumatic supply pipe 25: pneumatic discharge pipe
26: slime discharge pipe 3,30: rotating shaft and interlocking gear
31: Slime discharge passage 32a ~ 32e: Supply passage
33: Slime discharge tube 34: Swivel
4a ~ 4e: Swivel 41: Annular passage
42: injection hole 43a ~ 43d: pneumatic supply hose
43e: Water supply hose 5: Multi hammer drill device
51: small diameter hammer drill 52: drill bit
53: cylinder 54: ram
55 cylindrical case 55a rod connection
55b: middle case 55c: bottom case
56a ~ 56e: 1st ~ 5th connecting passage 56: Pneumatic connecting tube
57: pneumatic discharge passage 58: slime discharge injection passage
6: shock absorber 6a, 6b: upper and lower body
60: Slime discharge guide passage 61,62: Upper and lower flange
63: coupling pin 64,65: pin coupling hole
66,67: inner and outer buffer material 68: connecting tube
69a, 69b: upper and lower connection hole 7: joint member
70: Slime discharge connection passage 71,72: Upper and lower flange
73: connection pipe 74: pneumatic discharge connection hole
75: plate 76: arc plate
77: pneumatic discharge chamber 78: pneumatic discharge hole
8: protective cylinder 81: partition plate
82: pneumatic dispersion exhaust hole 83: outlet
9a: water supply pipe 9b: pneumatic injection pipe
91: water sprayer 92: bypass pipe
93: slime suction hole 94: slime suction pipe
95: suction extension pipe 96: pneumatic discharge hole
97: pneumatic discharge connection passage

Claims (6)

An upper auger that is installed at one or more stages of excavation rods that are installed to move up and down along slide guide rods that are vertically and parallelly attached to one side of the leader installed vertically high above the ground or water surface. A large-diameter auger excavation device comprising a drive unit, a lower auger drive unit to which casing rods are connected in one or more stages, and a multi-hammer drill device for drilling a large diameter pile hole with a plurality of small diameter hammer drills. In
The pneumatic and water supplied from the outside through a plurality of supply passages formed on the rotary shaft of the upper auger drive unit can be supplied to the multi-hammer drill apparatus through a plurality of supply pipes formed in the excavating rod, Slime formed by mixing water which is supplied to the bottom of the drill bit of each of the plurality of small diameter hammer drills formed to cool frictional heat generated when the rock strikes and the rock powder which is broken by the blow operation of each drill bit is formed on the rotary shaft The air can be discharged through the slime discharge passage and the air pressure that reciprocated the ram of each of the plurality of small diameter hammer drills up and down can be discharged to the air between the upper and lower auger drive units to be decomposed to the air. And, the other generated when the blow operation of the plurality of small diameter hammer drill In order to prevent the vibration from being transmitted to the upper auger drive unit, the upper auger drive receives the rotational power of the motor from the upper auger drive so as to block the vibration by absorbing and mitigating the upper auger drive unit. Large-diameter auger excavation device, characterized in that further comprising a buffer interposed between the top of the excavating rod protruding into.
The method of claim 1,
The shock absorber has an upper body having a top flange detachably connected to a lower end of a rotating body of the upper auger drive unit, and a lower flange connected to an upper side of an excavating rod protruding upward of the lower auger drive unit. Consists of a lower body inserted into the body, the upper and lower bodies are connected and coupled by a pair of coupling pins in the state, the inner and outer cushioning material is interposed, and the upper and lower flanges of the upper and lower bodies, respectively And a plurality of connecting tubes for connecting the plurality of supply passages formed on the rotary shaft and the plurality of supply pipes formed on the drilling rod.
The method of claim 1,
A joint member is interposed between the shock absorber and the upper end of the excavating rod, and the joint member is formed with a plurality of connecting end pipes connecting the plurality of connecting tubes formed in the shock absorber and the plurality of supply pipes formed in the excavating rod. A large diameter auger excavation apparatus, characterized in that a plurality of pneumatic discharge chamber and a plurality of pneumatic discharge hole for discharging the air pressure discharged from the formed plurality of pneumatic discharge pipe to the outside.
The method of claim 1,
The multi-hammer drill apparatus has a cylindrical case in which a plurality of small diameter hammer drills are mounted, and first to fifth connecting passages and a plurality of pneumatic discharge passages connected to each of the plurality of supply pipes and the plurality of pneumatic discharge pipes formed in the drilling rod. An intermediate case in which a rod connecting portion formed, a first to third connecting passages formed in the rod connecting portion, and a plurality of pneumatic connecting tubes connecting the plurality of small diameter hammer drills are installed, and the plurality of small diameter hammer drills. A lower case mounted at a lower end of the cylindrical case so that each drill bit protrudes downward, a plurality of slime suction holes formed in the lower case for sucking slime generated at the bottom of the lower case, and connected to the plurality of suction holes A plurality of slime suction tubes installed in the cylindrical case, and a lower end of the plurality of slime suction tubes; Is connected to the upper large-diameter auger drilling device, characterized in that includes a plurality of suction extension pipe is formed to couple with the slime discharge injection passage formed in the center of the connecting rod.
The method of claim 4, wherein
The multi-hammer drill device includes a water supply pipe connected to the fifth connection passage among the first to fifth connection passages formed in the rod connection unit and extending to an upper surface of the lower case, and a plurality of water powders branched from the water supply tube and formed in the lower case. Bypass pipe connected to the hole, and one end is connected to the fourth connecting passage formed in the rod connecting portion and the other end is located below the slime discharge injection passage of the rod connecting portion to inject high-pressure pneumatic pressure from the lower side to the upper side Large-diameter auger excavation apparatus comprising a.
The method of claim 4, wherein
The multi-hammer drill device is a U-turn in the cylindrical case in order to discharge the pneumatic pressure hitting each of the plurality of small diameter hammer drill inside the cylindrical case to discharge the air to the drill bit of each of the plurality of small diameter hammer drill reciprocating ram Pneumatic discharge hole for discharging the high pressure to the inside of the cylindrical case, and a plurality of pneumatic discharge connection passage is formed between the cylindrical case and the intermediate case to move the air pressure discharged into the cylindrical case into the intermediate case, the rod Lower ends of each of the plurality of pneumatic discharge passages formed between the first to fifth connection passages of the connecting portion are formed to be exposed to the intermediate case, and the air pressure moved into the intermediate case is discharged to the air through the plurality of pneumatic discharge passages. Large-diameter auger excavation device, characterized in that configured to.

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