KR0137695B1 - Double swivel of a drill machine - Google Patents

Abstract

The present invention relates to a double swivel of a ground excavator capable of supplying two types of fluids, such as compressed air and cement paste, to a hammer drill of a ground excavator. The present invention relates to a drive shaft of a drive device that is a power source of an OGA drive unit of a ground excavator. The double shoe bell is attached to the attachment hole attached directly to the attachment hole without directly attaching the orgas screw rod.In the attachment hole, the insertion connector located at the top of the double shoe bell is inserted and coupled to the fitting connector located at the bottom. The double shoe bell is installed to connect and couple the insertion connector of the rod, and the lower rotating body of the double shoe bell has a passage communicating with an existing shoe bell (1-Way Swivel) installed on an upper driving shaft of the driving device; Forming two passages in communication with the air inlet formed on both sides of the fixed cylinder of the double shoe bell, the compressed air supplied from both the inlet of the cement pool and the fixed cylinder supplied from the existing shoe bell to supply the different passages It aims to make the ground excavation work more efficient by supplying cement paste immediately after drilling the pile into the rock as a hammer drill.

Description

Double swivel of ground excavator to supply two kinds of fluids to different passages

1 is an overall configuration diagram of a ground excavator for explaining the present invention.

2 is a double swivel installation state of the present invention.

3 is a cross-sectional view showing the configuration of a double swivel of the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

Figure 5 is a cross-sectional view and a half-plane and half bottom view showing the configuration of the airtight packing interposed between the upper and lower rotor of the double swivel of the present invention.

6 is an operational state diagram of the hammer drill of the ground excavator for explaining the present invention.

7 is a configuration diagram of the Oga drive unit and the Oga screw device of the conventional ground excavator.

* Explanation of symbols for main parts of the drawings

1: crawler traveling device 2: supporting arm

3: Leader 4: Backstay

5: Pulley 6: Oga Drive Unit

7: Guide rod 8: Driving device

9: drive shaft 10: screw rod

11: Attachment 12: Swivel

13: Hammer drill 14: Strike bit

15: double swivel 16: information desk

17: Fixed outer cylinder 18: Upper rotating body

19: lower rotor 20: hexagonal assembly

21a, 21b: coupling pin 22: hexagonal connector

23: Coupling pin 24: Packing

25, 26: passage 27, 33, 34: connector

28: Central passage 29: Air inlet

30: inner ring passage 31: outer ring passage

32: eccentric path 35, 36: connecting pipe

37: hexagonal connector 38: binding pin

39a, 39b: outside, inside stone 40: information board

41: Confidential packing means

The present invention in the ground excavator for drilling piles in the ground at the time of construction of various civil works or concrete structures in order to be able to bury the pile inserted into the rock bed piles and when the pile is drilled in the rock layer in the ground A double swivel of a ground excavator that can supply two types of fluids, such as compressed air and cement paste, to a hammer drill.

More specifically, the double swivel is attached to the attachment hole attached to the drive shaft of the driving device, which is the power source of the Auger Drive Unit of the ground excavator, without directly attaching the Auger Screw rod. In the sphere, the double swivel is installed by inserting and coupling the insertion connector located at the top of the double swivel and then connecting and coupling the insertion connector of the oga screw rod to the fitting connector located at the bottom of the double swivel. The lower rotating body is formed to form a passage communicating with the existing swivel (1-Way Swivel) installed on the drive shaft top of the drive device, and two passages in communication with the air inlet formed on both sides of the fixed outer cylinder of the double swivel, The compressed air supplied from both the cement paste supplied from the existing swivel and the fixed outer cylinder can be supplied to different passages. As a hammer drill, it is possible to supply cement paste immediately after drilling piles on rock, so that the excavation work can be carried out more efficiently. Also, by supplying compressed air and cement paste to different passages, It was invented for another purpose to obtain the effect of not only the existing swivel installed in the Oga drive unit of the ground excavator, but also to significantly extend the service life of the oga screw rod and hammer drill.

In general, in order to build concrete structures such as pier constructions such as various dam works or overpasses and high-rise buildings, piles and piles were buried in the ground to support concrete structures, and ground excavators were used for this purpose.

As shown in FIG. 7, the conventional ground excavator is configured to allow the Oga drive unit 100 to move up and down by using the guide rod 101 on the leader side of the crawler driving device as shown in FIG. The drive unit 102 mounted to the planetary gear reducer is installed to rotate the drive shaft 103 at a moderately decelerated speed, and the drive shaft 103 has a screw rod (6) in a hexagonal attachment hole 104. 105) Insert the hexagonal connector 106 at the top, fasten it with the fastening pin 107, and install the orgas screw in the bottom of the top screw rod in multiple stages to excavate the ground, When the rock comes out, the hammer drill is connected to the hammer drill by connecting the hammer drill instead of the lowermost screw rod and then supplying compressed air to the hammer drill. As a device for supplying air to the hammer drill through the swivel 108 installed on the top of the drive shaft 103 of the drive unit 102 of the OGA drive unit, one pipe installed in the hollow part of the drive shaft and each screw rod is used. By supplying the hammer bit (Bit) of the hammer drill is moved up and down at the same time as the rotation is rapidly configured to strike the pile by hitting the rock, such a swivel 108 of the conventional ground excavator is one passage It is composed of only a single passage and screw rod and hammer drill have only one passage, so compressed air can be supplied smoothly, but since fluid such as cement paste could not be supplied, it is slow to drill piles and pile piles. There was a problem. That is, there is no problem in drilling the pile hole on the rock because only the compressed air for operating the hammer drill is required for drilling the rock with the hammer drill mounted on the lower end of the conventional earth excavator. After drilling the pile hole, the cement pile must be injected into the pile file of the rock to be able to bury the pile firmly. The conventional ground excavator cannot supply cement paste with the hammer drill used to drill the rock. Therefore, when pulling up the hammer drill that was sent down to the rock bed in the deep ground, it is necessary to repeat the dismantlement of the screw rods one by one. Fill the appropriate amount into the rock pile hole formed in the rock by injecting Has a problem that the installation time of pile is very slow due to a very cumbersome work process, and the ground pile hole formed in the ground collapses when the screw rod is completely removed to inject cement paste into the rock pile hole deep in the ground. Following this, there was a problem such that the complementary work should be done in parallel.

So, recently, the method of remodeling the hammer drill to make a passage for supplying cement paste and then supplying compressed air and cement paste in parallel using an existing swivel composed of only one passage was introduced. After supplying the cement paste, it is necessary to clean the supply passage of the swivel and the passage of the screw rod and the hammer drill as water, which has not been put to practical use because it is very difficult and time-consuming.

Accordingly, the present invention is to solve the above problems and further reduce the work time and manpower required to install the file on the ground, so that the file can be installed more efficiently, to the drawings of the embodiment attached to the present invention Therefore, it will be described in detail.

1 and 2 is a view for explaining the present invention, the crawler traveling device (1) constituting the existing ground excavator is composed of a wheeled track and a cab with an erroneous track, installed on the support arm (2) The leader 3 is standing up by the backstay 4.

In the upper portion of the leader 3, the pulley 5 for balancing action and the orga drive unit 6 suspended by a wire cable are configured to move up and down on the guide rod 7.

The oga drive unit is equipped with a drive device 8 as a power source, and the lower end of the drive shaft (9) of the drive device has a hexagonal attachment hole (11) for coupling the screw rod (10), etc., and the top of the drive shaft The swivel 12 which has one channel | path is installed in the side.

In addition, the screw rod 10 is composed of a certain length is configured to assemble one by one through the ground to enter the ground excavator is usually composed of a screwdriver combined with a screw rod in multiple stages, the lowest screw rod Attached to the Oga head (not shown) to excavate the ground, when the rock layer comes out, the Oga head is dismantled and equipped with a hammer drill 13, and then supplying compressed air through the swivel 12 for the hammer drill It is configured to operate the bit 14.

In the present invention, the upper end of the double swivel (15) separately configured to the hexagonal mounting holes 11 attached to the drive shaft (9) of the drive device (8), which is the power source of the OGA drive unit (6), is inserted and connected, The lower end of the double swivel is to assemble the screw rod 10 so that the compressed air and the cement paste can be supplied in parallel.

Referring to the assembly and operation configuration of the double swivel (15), the double swivel (15) is inside the fixed outer cylinder (17) in which the guide 16 for guiding the lifting operation riding the guide rod (7) is fixed The upper rotating body 18 and the lower rotating body 19 are freely installed by supporting bearings 17c and 17d, and the upper and lower parts of the fixed outer cylinder 17 are covered with covers 17a and 17b. It is submitted in.

The upper rotary body 18 is inserted into the fixed outer cylinder 17 only at the lower end, and the hexagonal body 20 is inserted into the hexagonal inner surface and is fastened with two coupling pins 21a and 21b. The pin grooves 20a and 20b to which the two coupling pins are fastened are formed at positions slightly larger than the coupling pins and displaced from each other when viewed horizontally. The reason why the pin grooves on both sides are formed at the positions displaced as described above is to increase the rotation torque strongly, and the larger configuration than the coupling pins 21a and 21b is to reduce the impact.

In addition, the hexagonal connector 22 which is tightly inserted into the hexagonal inner surface of the attachment hole 11 attached to the drive shaft 9 is fastened with a bolt at the upper end of the hexagonal assembly 20, and the hexagonal connector 22 is provided. Is fastened to the attachment hole 11 by two coupling pins (23).

Between the hexagonal assembly 20 and the lower rotating body 19 of the upper rotating body 18 is provided with a packing 24 that can alleviate and absorb the impact, the upper surface of the packing having a smooth arc surface Two convex protrusions 24a are provided, and two lower protrusions 24b having a semicircular cross section are concentrically arranged at the bottom thereof, and these protrusions are assembled with a hexagonal coupling body 20 and a lower rotating body 19. When pressed, it should be kept tight. In addition, passages 25 and 26 are provided at the center of the hexagonal connector 22 and the hexagonal assembly 20 so as to communicate with the hollow portion 9a formed on the drive shaft 9. It is connected directly to the center passage 28 of (19).

On the inner surface of the fixed outer cylinder 17 of the double swivel 15 is provided with an inner annular passage 30 penetrating through the air inlet 29 formed on both outer sides, the outer surface of the lower rotating body 19 is an electric annular An outer annular passage 31 is provided to be combined with the passage 30, and two eccentric passages 32 communicating with the outer annular passage 31 are formed on both sides of the central passage 28, and are arranged side by side. Connecting end pipes 33 and 34 are inserted into lower ends of the passage 28 and the two eccentric passages 32, respectively, and are connected to connection pipes 35 and 36 vertically installed in the screw rod 10.

On the other hand, at the lower end of the lower rotating body 19, the inner cylinder is connected to the hexagonal connector 37 on the upper end of the screw rod 10 is assembled at the top by welding the connecting cylinder (19a) of the hexagonal two By fastening with a pin 38 is configured to rotate the orgas screw consisting of a multi-stage screw rod.

In addition, four protrusions are symmetrically protruded from the guide portion 16 of the double swivel 15. A pair of guide plates 40 are selectively attached to both the outer protrusion 39a and the inner protrusion 39b. This is because the two guide rods (7) are divided into two types according to the type of ground excavator (see Fig. 4), so that the guide plate 40 can be selectively attached to the outer or inner side pieces. In addition, between the fixed outer cylinder 17 and the lower rotating body 19, a hermetic packing means 41 is interposed, and the hermetic packing means are formed on the upper and outer annular passages 30 and 31 of the upper body. The lower side is installed separately and each airtight packing means is composed of a plurality of annular packings are stacked.

With the present invention made of such a member will be described the action of drilling the ground and the action of drilling the pile hole in the rock and the action of injecting cement paste into the pile hole.

As shown in the example of FIG. 1, the screw rod 10 is assembled in multiple stages to the attachment hole 11 of the OGA drive unit 6, and the OGA head is assembled to the lowermost screw rod, and then the driving device 8 is driven. When the Oga drive unit itself is lowered and operated gradually, the Oga head excavates the ground (G), and the screw rod moves up and excavates the soil which is being excavated, which is the same as the conventional one, while excavating the ground and the rock layer (R) is When it comes out, instead of dismantling the orga head on the lowermost screw rod, the hammer drill 13 is attached and the hammer drill is lowered to the previously drilled pile hole to hit the rock layer to form the pile hole. The compressed air is supplied using the double swivel 15 that is attached to the attachment hole 11 without using the swivel 12 installed on the top of the drive shaft 9 of the drive device 8 as in the related art. will be.

That is, when compressed air is supplied by connecting a hose of a compressor (not shown) to the air inlets 29 at both sides of the fixed outer cylinder 17 of the double swivel 15, the compressed air is integrated into the inner and outer annular passages. (30) and (31) were supplied to the connecting pipes 36 of each screw rod 10 along the eccentric passages 32 on both sides, and the hammer drill 13 was operated to strike the rock layer R. As described above, the operation of forming the pile ball in the rock by operating the hammer drill 13 as described above is the same as the conventional one, but in the present invention, the fixed outer cylinder constituting the double swivel 15 coupled to the drive shaft 9 is provided. The sieve 17 can only move up and down by using the guide rod 7, while the upper and lower rotors 18 and 19 assembled inside the fixed outer cylinder 17 support bearings 17c and 17d. Rotating power of drive shaft is screwed because rotation is freely supported while being firmly supported by It can be delivered to the rod 10 as it is, while the inner annular passageway 30 of the fixed outer cylinder maintains the state of being always combined with the outer annular passageway 31 of the lower rotating body 19 in a circular tube shape. Compressed air supplied from the air inlet 29 passes through the connection pipe 36 of each screw rod 10 through the eccentric passage 32 formed on both sides while flowing into the inner and outer annular passages 30 and 31. The hammer drill is supplied to the hammer drill 13 to quickly reciprocate the blow bit 14 to drill the pile hole in the rock layer, and the soil or stone generated when the pile hole is formed is the outer shell of the screw rod and the hammer drill. It will be thrown to the ground by a screw blade formed in the sieve. And as described above, when the hammer bit 14 of the hammer drill hits the rock to form a pile hole, the reaction force must appear according to the operation, such a reaction force as well as the double swivel 15 to the drive shaft It can be transmitted, it is a preferred configuration that if the reaction force is transmitted to the drive shaft (9) causes a failure of the drive device (8) so that the reaction force is not transmitted to the drive shaft. Therefore, in the present invention, the reaction force transmitted to the lower rotating body 19 is interposed between the hexagonal assembly 20 and the lower rotating body 19 of the upper rotating body 18 of the double swivel packing 24. ), And the fin grooves 20a and 20b of the hexagonal coupler 20 are slightly larger than the coupling pins 21a and 21b to form the clearance space, so that the clearance space is the upper portion. It acts to alleviate the aftershock of the strike reaction transmitted to the rotating body 18 so that the impact reaction is not transmitted to the drive shaft (9) to exhibit the effect that can completely protect the drive device (8) It was.

In addition, the plurality of protrusions 24a and 24b protrude concentrically on the upper and lower surfaces of the packing 24 so that the protrusions are compressed when assembling the hexagonal coupling body 20 and the lower rotating body 19. The packing 24 itself was able to fully exhibit the effect of airtightness.

After supplying the compressed air to the double swivel (15) as described above to operate the hammer drill (13) to form a pile ball to a certain depth, and then to raise the Oga screw and hammer drill by rotating reversely, the supply of compressed air When the cement paste is supplied to the swivel 12 installed at the upper end of the drive shaft 9 while the cement paste is connected, the passage 25 of the hexagonal connector 22 and the hexagonal assembly 20 vertically connected to the hollow portion of the drive shaft. It is installed inside the hammer drill 13 through the center passage 28 of the lower rotary body 19 connected to the 26 and the connecting end pipe 27 and the connecting pipe 35 installed in the center of each screw rod 10. It is supplied between the cylinder body and the outer cylinder to operate the bit 14 for hitting the cement paste is injected into the pile hole formed in the rock layer, as described above, the present invention forms a pile hole in the rock layer, and then hammer drill (reverse rotation operation) 13) while raising Since cement paste can be injected into pile holes, manpower or equipment mobilization due to pile installation can be reduced and the simultaneous working time can be markedly shortened. Particularly, the present invention provides a compressed air for operating a hammer drill. By separately supplying the passages and the passages of the cement paste, it is possible to improve work efficiency much better than supplying compressed air and the cement paste in one passage as in the prior art as well as cement into the cylinder body of the hammer drill. It is a novel invention that can effectively prevent the case of powder or sand is introduced, which can significantly extend the service life of the hammer drill.

Claims (3)

A swivel 12 having one passage is installed above the drive shaft 9 of the drive device 8 constituting the OGA drive unit 6, and an attachment hole 11 and a screw rod attached to the lower end of the drive shaft are installed. 10. In the ground excavator for connecting the hexagonal assembly 20 and the hexagonal connectors 22 and 37, it is installed between the attachment hole 11 and the uppermost screw rod 10, and the rotational force of the drive shaft is screwed. A double swivel 15 for transmitting to the rod; A fixed outer cylinder 17 in which the double swivel is welded integrally with the guide portion 16 for guiding the lifting and lowering operation on the guide rod 7 of the leader 3; The upper and lower rotary bodies 18 and 19, which are supported by the support bearings 17c and 17d so as to be freely rotated while being installed inside the fixed outer cylinder, receive the rotational force from the hexagonal coupling body 20 and rotate together. ; It is formed on each of the inner circumferential surface of the fixed outer cylinder 17 and the outer circumferential surface of the lower rotary body 19 to pass through the lower side of the lower rotary body 19 so as to communicate with the inner and outer annular passages 30 and 31. Two eccentric passages 32; The central passage 28 of the lower rotary body 19 in vertical communication with the passages 25 and 26 formed at the center of the hexagonal coupling body 20 and the hexagonal coupling body 22 connected to the upper rotary body 18. )Wow; And a connecting pipe installed in the hexagonal connector 37 on the uppermost screw rod 10 side so as to be vertically connected to the central passage 28 and the two eccentric passages 32 formed on the lower rotating body 19. 35) (36); double swivel of the ground excavator for supplying two types of fluid to different passages, characterized in that configured to supply the supply of compressed air and the supply of cement paste to different passages. The packing according to claim 1, wherein a plurality of protrusions (24a, 24b) protrudes concentrically on the upper and lower surfaces between the hexagonal coupling body (20) inserted into the upper rotary body (18) and the lower rotary body (19). A double swivel of a ground excavator for supplying two kinds of fluids through different passages, each of which is provided with (24). The method according to claim 1, wherein the guide plate 40 is formed so as to be selectively attached to the inner protrusion pieces 39a and 39b in addition to the pair of the guide parts 16 welded to the fixed outer cylinder 17. Double swivel of the ground excavator to supply two kinds of fluids to different passages.