KR20120094561A - Earth auger machine - Google Patents

Abstract

PURPOSE: An earth auger machine is provided to simultaneously or individually supply cement paste and pneumatic pressure using a cement paste supply swivel and a pneumatic pressure supply swivel. CONSTITUTION: An earth auger machine(1) comprises a cement paste supply swivel(17), a pneumatic pressure supply swivel(4), a pneumatic pressure passage(24), a ring shaped passage(44), a connection passage, a cement paste supply pipe(23), and an expansion portion(29). The cement paste and pneumatic pressure supply swivels are installed on the top end of a main shaft(2) installed on a gear box(14) and simultaneously or individually supply cement paste and pneumatic pressure. The pneumatic pressure passage has a bigger diameter of the cement paste supply pipe and is formed on the center of the main shaft. The ring shaped passage is connected to a pneumatic pressure injection port(43) of the pneumatic pressure supply swivel. The connection passage connects the ring shaped passage and the pneumatic passage to each other. The top and bottom of the cement paste supply pipe is connected to a cover of the pneumatic pressure supply swivel and a center hole of a female joint(25). The expansion portion is connected to a connection hole of the female joint.

Description

Ground Excavation Equipment {Earth auger machine}

The present invention relates to a ground excavation device, and more particularly, mounted on the upper and lower ends of a main shaft and a plurality of excavating rods connected to the main shaft and assembled in multiple stages by receiving rotational power from an auger drive unit. The cement joint supply pipe is formed at the center of each of the plurality of excavating rods connected to the main shaft by improving the structure of the male joint and the female joint, while the respective excavating rods themselves supply air pressure. The present invention relates to a ground excavation apparatus that can be easily manufactured and assembled and can reduce production costs by simplifying the structure of a main shaft and a plurality of excavation rods for simultaneously supplying cement paste and pneumatics by allowing them to be used as a passageway for the same.

In general, the ground excavation device for constructing piles when constructing soft ground improvement works, underground wall continuous wall construction, or high-rise buildings is used to excavate the ground by injecting only one type of cement paste into the excavated ground. It is mainly used in the process of excavating the ground while simultaneously injecting cement paste and compressed air into the process and the excavated strata.

The ground excavation device of the prior art is an auger drive unit which is installed to be able to move up and down along the leader fixed vertically to the ground and the auger drive unit is installed on the lower side of the auger drive unit can rotate A main shaft having a gear box mounted on the main shaft, an interlocking gear meshed with a drive gear fixed to the reduction output shaft while being rotatably installed on the gear box, and rotatably mounted on an upper end of the main shaft to be transferred from the outside. A swivel for supplying the cement pool to the main shaft and a plurality of excavation rods connected to the lower end of the main shaft in a plurality of phases to guide the discharge of the cement pool supplied through the main shaft into the excavation hole, The ground excavation device includes excavating rods in one axis on each of main shafts of one to five axes formed in the gear box. To selectively connect the assembly to the shaft 5 and is configured to excavate the ground.

In addition, the conventional ground excavation device is provided in the main shaft of one axis to five shafts rotatably mounted in the gearbox and one or more shafts in the drilling shaft of one axis to five shafts are assembled in a multi-stage connected to the supply shaft formed in the main shaft A plurality of supply pipes are connected to each other, and are configured to inject cement paste and pneumatic into the excavation hole to be excavated during the ground excavation.

In the conventional ground drilling device as described above, when only one kind of cement paste is to be supplied to the ground to be excavated, the main ground and the water joint and the female joint assembled at the upper and lower ends of the drilling rod connected thereto are supplied through the center. Each of the passages are drilled one by one, and then connects the supply passages formed in the upper and lower joints and female joints of the excavating rod with a single supply pipe (pipe), the cement supplied to the supply passage of the main shaft It is configured to evenly mix and stir the cement paste to the excavated soil by allowing the pool to be discharged in the excavation hole excavated through a single supply pipe connecting the supply passage of each of the water joint and the female joint.

However, when excavating the ground with the conventional ground excavation device, if you want to inject both cement paste and pneumatic into the drilling hole at the same time, one single swivel installed on the top of the main shaft cannot supply cement paste and pneumatic at the same time. .

Therefore, the inventor of the present invention has proposed the patent registration No. 137695, 419973, 451962.

The above-mentioned patents are connected to the assembly of a multi swivel for supplying air pressure to the bottom of the main shaft separately from the single swivel mounted on the top of the main shaft, and to connect the excavation rod to the bottom of the multi swivel, the multi The swivel is a cement pull passage connected to a cement paste supply passage formed at the center of the main shaft together with an annular passage into which pneumatic pressure is supplied from the outside, and a pneumatic passage for supplying pneumatics injected through the annular passage to an excavating rod. Since it is to be formed in a structure that drills in different positions, the processing cost and manufacturing cost of the multi swivel is expensive, and the drilling rods assembled and connected to the multi swivel are joints and upper and lower joints, respectively, Cement paste supply passage for separating and supplying cement paste and pneumatic Since the pneumatic supply passage must be drilled separately, and at least two supply pipes such as a cement pool supply pipe and a pneumatic supply pipe must be installed in order to transfer the cement paste and the pneumatic pressure separately in the excavation rod, the above-described prior art ground excavation It is pointed out that the structure of the multi swivel and the excavating rod connected to the bottom of the main shaft of the device is complicated, which increases the processing cost, the assembly cost, and the manufacturing cost, which causes the ground drilling equipment to be very expensive.

The present invention has been proposed in order to solve the problems described in the prior art as described above, by forming a cement pool supply passage and a pneumatic supply passage in the center of the main shaft rotatably installed in the gear box of the main shaft Even if the cement pool supply swivel for supplying cement paste and the pneumatic supply swivel for supplying air pressure are installed up and down, the cement pool and pneumatic are separately separated from the excavation rod connected to the bottom of the main shaft. In order to supply and to improve the center of the water joint and the female joint mounted on each of the upper and lower ends of the drilling rod in a double pipe structure to connect and install one supply pipe for supplying cement paste to the center of the drilling rod Its purpose is to supply cement paste and pneumatic at the same time. It is possible to supply cement paste and pneumatic separately at the same time by using a pneumatic supply swivel that can be manufactured at a relatively low production cost because the structure is simple and does not use a complicated swivel, which is complicated in structure and expensive to manufacture. The present invention has been invented for the purpose of reducing the manufacturing cost of the excavating rod as a structure in which one supply pipe for supplying cement paste is connected to the inside of the rod and supplying pneumatic pressure through the inside of the excavating rod.

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

Of the planetary gear reducer so as to rotatably support the auger drive unit integrally connected and assembled with the motor and the planetary gear reducer for reducing the rotational speed of the motor, and the reduction output shaft projecting to the lower end of the planetary gear reducer of the auger drive unit. A gear box connected to the lower end, a drive gear fixed to the reduction gear shaft of the planetary gear reducer so as to be rotatable inside the gear box, and rotatably installed on the gear box while being spaced apart at regular intervals from the reduction gear shaft. A main shaft, and an interlocking gear that is fixed to the main shaft so as to be engaged with the driving gear, a swivel for supplying cement paste for supplying cement paste, connected to an upper end of the main shaft so as to be located above the gearbox, and the main Consisting of excavating rods connected to the arm joints attached to the bottom of the shaft In the drilling apparatus,

It is installed between the upper surface of the gearbox and the cement pool supply swivel and further comprises a pneumatic supply swivel for supplying pneumatic pressure separately from the cement pool supply swivel for supplying cement paste, the pneumatic The supply swivel is formed of a structure that is installed to rotatably wrap the upper end of the main shaft protruding higher than the upper surface of the gearbox,

At the center of the main shaft is formed a pneumatic passage having a larger diameter than the cement paste supply pipe is inserted into the cement paste supply swivel to be connected to the cement paste injection passage,

The upper end of the main shaft is formed with an annular passage connected to the pneumatic inlet of the pneumatic supply swivel and a connecting passage connected to the pneumatic passage,

The upper end of the cement pool supply pipe is connected to the cover of the pneumatic supply swivel, the lower end of the cement pool supply pipe is formed in a structure connected to the center hole formed in the center of the arm joint connected to the lower end of the main shaft,

The lower end of the main shaft is formed with an expansion pipe for extending the lower portion of the pneumatic passage,

The female joint of the main shaft is characterized in that a plurality of connecting holes are connected to the expansion pipe formed in the lower side of the pneumatic passage.

In addition, the upper end of the drilling rod is equipped with a male joint is inserted into the female joint of the main shaft, the connecting joint formed in the lower end of the female joint center hole of the main shaft is detachably connected and at the same time inside the drilling rod A small diameter connecting portion is fixedly connected to the upper end of the cement pool supply pipe to be installed, a large diameter connecting passage formed to have a larger diameter than the cement pool supply pipe at the lower end of the small diameter connecting portion, and connected to each of the plurality of connecting holes formed in the female joint. It characterized in that the plurality of connecting holes are formed at a predetermined interval around the small diameter connecting portion and a plurality of connecting passages connecting the upper side of the large diameter connecting passage and the lower side of the plurality of connecting holes.

In addition, the lower end of the excavating rod is equipped with a female joint is inserted into the water joint mounted on the upper end of the excavating rod, the female joint is a small diameter connecting portion is fixedly connected to the bottom of the cement pool supply pipe installed inside the excavating rod And a connection end tube detachably connected to the small diameter connecting portion of the male joint mounted on the upper end of the drilling rod while being fixedly connected to the small diameter connecting portion, and a plurality of connecting holes formed at a predetermined interval around the small diameter connecting portion. It is done.

In addition, the excavating rod is welded to the upper, middle, and lower support plates, the plurality of through holes are formed at a predetermined interval therein, a plurality of through holes formed in the lower support plate while being elastically supported by a spring on the bottom of the lower support plate It is characterized in that the check valve is opened and closed.

In addition, a ring-shaped packing is inherent in a bottom of a plurality of connecting holes formed in each of the female joint connected to the lower end of the main shaft and the female joint mounted at the lower end of the drilling rod, and the ring-shaped packing is provided in communication with a plurality of connecting holes. It characterized in that the metal ring is formed.

In addition, the lower end of the excavation rod between the upper surface and the lower support plate of the female joint mounted to the lower end of the excavating rod is characterized in that the nipple is detachably screwed to the cleaning tool.

According to the present invention, the cement pool supply swivel and pneumatic supply swivel connected to the upper and lower surfaces of the gear box are effective to simultaneously supply the cement pool and pneumatic, and the pneumatic supply swivel is Compared to the multi swivel, the structure is simple, so it can be manufactured at a low production cost, and the excavation rod of the present invention can be supplied separately from the cement paste and pneumatic as a simple structure in which one cement paste supply pipe is installed. Compared with the installation of cement pool supply pipes and a plurality of pneumatic supply pipes inside, it provides the effect of manufacturing excavation rods at a low manufacturing cost, and further reduces the overall weight of the ground excavation device to operate the ground excavation device. To save fuel and electrical energy It would have advantages.

1 is a partial cross-sectional structural view of the ground excavation device for explaining the present invention,
2 is an assembly state diagram of each of the cement pool supply swivel and pneumatic supply swivel and the main arm joint connected to the upper and lower ends of the main drilling rig of the present invention,
Figure 3 is a cross-sectional view of the excavation rod of the ground excavation device 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.
6 is a cross-sectional view taken along line CC of FIG.
7 is an assembled state sectional view of the female joint of the main shaft and the male joint of the excavating rod of the ground drilling apparatus of the present invention;
8 is a cross-sectional view of the female joint of the lower end of the excavation rod and the male joint of the excavation rod of the present invention.

Referring to the accompanying drawings, a concrete embodiment of the ground drilling apparatus according to the present invention in detail as follows.

Reference numeral 1 denotes a ground excavation device, and the ground excavation device 1 is installed to be able to move up and down along a leader (not shown) vertically fixed to the ground.

The ground excavator 1 includes at least one motor 11, a planetary gear reducer 12 that is integrally coupled to the motor to reduce rotational power of the motor, and fixedly attached to a lower end of the planetary gear reducer. Gear gear 14 for rotatably supporting the reduction gear shaft (13) of the planetary gear reducer, and meshes with the drive gear (15) installed on the reduction gear shaft (13) while being rotatably supported on one side of the gear box. The main shaft (2) in which the interlocking gear (16) is condensed, and the cement pool supply swivel (17) and the lower end of the main shaft (2), which are connected to the upper end (21) of the main shaft and supply the cement paste ( The plurality of excavating rods 3 are connected to 23) in one or more stages and are connected downward.

In addition, the ground excavation device (1) is attached to the lower end of the lowermost side of the excavating rod that is connected to the lowermost side of the plurality of excavating rods (3) connected downward in one or more stages (not shown) Or a hammer drill (not shown).

In addition, the gear box 14 of the ground excavation device (1) is selectively connected to the excavating rod (3) of 1 to 5 axes, each of the excavating rods of the 1 to 5 axis is at least one motor (11) It is configured to excavate the ground while receiving the rotational power from the rotation.

Features of the present invention, to supply the cement pool supply swivel 17 and the air pressure for supplying cement paste to the top of the main shaft (2) rotatably installed in the gear box 14 of the ground excavation device (1) Pneumatic supply for the swivel (4) is installed to connect up and down, and configured to supply the cement paste and pneumatic at the same time separately through the main shaft (2).

To this end, a pneumatic passage 24 having a diameter larger than that of the cement pool supply pipe 23 for supplying cement paste is formed at the center of the main shaft 2, and also the upper end 21 and the lower end of the main shaft 2. 22 is formed so as to protrude upward and downward from the upper and lower surfaces of the gearbox 14, respectively, the pneumatic supply swivel 4 is the upper end of the main shaft (2) protruding to the upper surface of the gearbox (14) It is installed so as to surround the outer periphery of the upper end 21 so that the 21 is rotatable, and the cement pool supply swivel 17 is connected and installed on the pneumatic supply swivel 4.

In addition, the cement pool supply pipe 23 is inserted into the pneumatic passage 24 formed in the center of the main shaft (2), the upper end of the cement pool supply pipe 23 is the outer cylinder of the swivel (4) for pneumatic supply Is connected to the center hole formed in the cover 42 to cover the 41, the lower end is coupled to a plurality of fastening bolts to the connecting flange 26 is attached to surround the lower end 22 of the main shaft (2) It is connected to the center hole 27 of the female joint (25).

And the connecting end pipe 28 is welded and fixed to the lower end of the center hole 27 of the female joint 25 is connected to the lower end 22 of the main shaft 25.

At the lower end of the main shaft (2), a lower portion of the pneumatic passage (24) is gradually expanded toward the lower portion is formed with an expansion tube (29) which is expanded into a fallopian tube shape, the lower end (22) of the main shaft (2) Around the center hole 27 of the female joint 25 to be connected is formed in a state where a plurality of connecting holes 20 are formed spaced apart at regular intervals to penetrate up and down.

The bottom of the plurality of connecting holes 20 formed in the female joint 25 of the main shaft 2 is provided with a ring-shaped packing (5a) in a state surrounding the connecting end pipe 28, the ring-shaped packing (5a) A plurality of metal rings 51 having the same number as one of the plurality of connecting holes 20 are formed at a predetermined interval, and the plurality of metal rings 51 are formed of a single tube made of metal. Accordingly, the plurality of metal rings 51 are fixedly attached to the ring-shaped packing 5a made of rubber material, such that the ring-shaped packing 5a is inserted into and connected to the female joint 25 and the ring-shaped packing 5a. The plurality of metal rings 51 are not deformed even if they are deformed under pressure from the joint 3a.

Meanwhile, a lock nut for fastening the connecting flange 26 is screwed into the lower end 22 of the main shaft 2, and the outer cylinder 41 of the pneumatic supply swivel 4 is screwed in place. On one side, a pneumatic inlet 43 for connecting a pneumatic hose (not shown) to the pneumatic pressure supplied from the outside is formed, and an annular passage communicating with the pneumatic inlet 43 on the outer circumference of the upper end 21 of the main shaft 2. 44 is formed, and one side of the annular passage 44 has a connection passage 45 connected to the pneumatic passage 24 is formed.

Therefore, even if the main shaft 2 is rotated, the cement paste injected through the cement paste injection passage 18 of the cement pool supply swivel 17 is transferred to the cement paste supply pipe 24 installed at the center of the main shaft 2. At the same time, the pneumatic pressure injected through the pneumatic inlet 43 formed on one side of the outer cylinder 41 of the swivel 4 for pneumatic supply is the pneumatic passage 24 through the annular passage 44 and the connecting passage 45. ) Is supplied.

Another feature of the present invention is a simple structure in which one cement pool supply pipe 6 is installed inside the excavation rod 3 so that cement pool and pneumatic pressure can be simultaneously supplied through different passages.

To this end, at the center of each of the male joint (3a) mounted on the top of the drilling rod (3) and the female joint (3b) mounted on the bottom of the drilling rod (3) cement pool supply pipe (mounted to the inside of the drilling rod (3) 6) Small diameter connecting portions 31a and 31b having upper and lower ends connected by welding are provided, and a diameter larger than the outer diameter of the cement pool supply pipe 6 is provided below the small diameter connecting portion 31a of the water joint 3a. A large diameter connecting passage 32 having is formed.

Therefore, the center of the water joint (3a) is formed in a double pipe structure by the cement pool supply pipe 6 is inserted into the large diameter connecting passage (32) (see Fig. 3).

In addition, a plurality of connecting holes 33 are formed on the upper surface of the water joint 3a at regular intervals around the small diameter connecting portion 31a, and each of the plurality of connecting holes 33 is connected to the large diameter by the connecting passage 34. It is connected to the connecting passage (32).

In addition, the lower end of the small diameter connecting portion 31b of the female joint 3b is fixedly attached by welding while the upper end of the connecting end tube 35 is inserted, and the lower end of the connecting end tube 35 is located below the small diameter connecting portion 31b. It protrudes inside the female joint 3b.

In addition, a plurality of connecting holes 36 are formed on the upper surface of the female joint 3b at regular intervals around the small diameter connecting portion 31b, and the plurality of connecting holes 36 are formed on the upper surface of the female joint 3b. It is formed in the state penetrating toward the inside.

In addition, a ring-shaped packing 5b having the same structure as the ring-shaped packing 5a mounted inside the arm joint 25 connected to the lower end 22 of the main shaft 2 is also connected to the inside of the female joint 3b. It is mounted in a state surrounding the end pipe 35, and the plurality of metal rings 51 connected to the plurality of connection holes 36 are fixedly attached to the ring-shaped packing 5b at regular intervals.

And the inside of the excavating rod (3) the upper and lower holding the cement pool supply pipe (6) connecting the small joints (31a, 31b) of each of the water joint (3a) and the female joint (3b) mounted at the bottom The middle and lower support plates 7a, 7b, and 7c are fixedly installed, and a plurality of through holes 71, 72, and 73 are formed at predetermined intervals in the upper, middle, and lower support plates, respectively.

Another feature of the present invention is that it has a check valve 8 which is opened only when supplied above the pressure set in the drilling rod 3.

The check valve (8) is located at the bottom of the lower support plate (7c) is elastically supported by a spring 81 to enable the up and down movement of the elastic pool along the cement pool supply pipe (6), the check valve (8) ) Is formed in a circle having a radius larger than the radius of the plurality of through holes 73 formed in the lower support plate 7c. In addition, an upper surface of the check valve 8 is provided with a sealing O-ring (not shown) for hermetically sealing the plurality of through holes 73 formed in the lower support plate 7c during the closing operation.

Both sides of the lower end of the excavating rod (3) is provided with a cleaning tool 38, the nipple (37) is screwed. Therefore, when foreign matter such as earth and sand has penetrated into the space portion between the lower support plate 7c and the female joint 3b, the nipple 37 is unscrewed to open the cleaning tool 38, and then the opened cleaning tool ( 38) it is possible to remove the foreign matter to prevent the malfunction of the check valve (8) and to ensure the correct opening and closing at all times.

Referring to the operation according to the embodiment of the present invention configured as described above are as follows.

The ground drilling device 1 inserts the male joint 3a mounted on the upper end of the drilling rod 3 into the female joint 25 mounted on the lower end 22 of the main shaft 2, and then, as in the prior art. When the coupling pin is inserted into the pin hole formed at both sides of the female joint 25, the female rod 25 may be mounted on the upper end of the excavation rod 3 to the female joint 25 mounted on the lower end 22 of the main shaft 2. The joint (3a) is to be assembled and assembled, wherein the male joint (3a) mounted on the top of the drilling rod (3) is ring-type inserted into the female joint (25) connected to the lower end (22) of the main shaft (2) It is coupled to the female joint 25 in a state in which the packing 5a is elastically compressed (see FIG. 7), even though the ring-shaped packing 5a is pressed and deformed between the female joint 25 and the male joint 3a. The plurality of metal rings 51 made of metal are not deformed, but are formed in the plurality of connecting holes 20 and the male joint 3a formed in the female joint 25. It is tied the connecting hole 33 of the can.

Subsequently, when the lower drilling rod 3-1 (represented by the reference numeral '3' in the case of representative description) is connected to the lower end of the upper drilling rod 3 connected to the main shaft 2 as described above. The male joint 3b mounted on the upper side of the lower drilling rod 3-1 is inserted into the female joint 3b mounted on the lower side of the upper drilling rod 3, and in this case, the upper joint The lower drilling rod 3-1 inserted into the female joint 3b by inserting the coupling pin into pin holes formed on the outer circumferential sides of the female joint 3b mounted at the lower end of the drilling rod 3. It is to assemble and connect the upper joint 3a (see FIG. 8), and at this time, the upper end of the female joint 3b mounted on the lower end of the upper drilling rod 3a and the lower drilling rod 3-1. Even if the ring-shaped packing 5b interposed between the mounted water joints 3a is compressed, the plurality of metal rings 51 are not deformed. The plurality of connecting holes 36 formed in the time-limited female joint 3b and the plurality of connecting holes 33 formed in the male joint 3a are connected to each other, and also the connecting holes of the female joint 3b. Although the connection holes 33 of the joints 36 and the joints 33 of the male joint 3a are not vertically aligned and displaced from each other, the pneumatic pressure supplied through the connecting holes 36 of the female joint 3b is applied to the male joint 3a. It will be smoothly supplied through the connecting holes (33) of.

By connecting the plurality of excavation rods 3 in a multi-phase continuous vertical connection as described above, the ground is excavated to a set depth, the ground excavation device 1 of the present invention is the upper end of the main shaft (2) Although the cement paste and pneumatic pressure are simultaneously supplied through the cement pool supply swivel (17) and pneumatic supply swivel (4) installed up and down at the same time, the cement pool and pneumatic are connected to the main shaft (2) in multiple phases. Will be able to supply at the same time through the passage formed separately in each of the plurality of excavating rod (3).

First, the cement paste supplied through the cement pool supply swivel 17 installed on the pneumatic supply swivel 4 connected to the upper end 21 of the main shaft 2 is connected to the lower end of the main shaft 2 ( The process of supplying to the cement pool supply pipe 6 formed in the plurality of excavating rods 3 to be assembled and connected in multiple stages to 22).

The cement pool supplied through the cement pool supply swivel 17 is injected into the cement pool injection passage 18 as shown in FIG. 2 and inserted into the pneumatic passage 24 of the main shaft 2. The connecting end pipe 28 welded to the center hole 27 of the female joint 25 assembled to the lower end 22 of the main shaft 2 is connected through the 23 and then shown in FIG. 7. The small diameter connecting portion 31a of the water joint 3a mounted on the top of the excavating rod 3 and the small diameter connecting portion 31a are supplied to the cement pool supply pipe 6 welded with the upper end inserted therein.

In addition, the cement pool supplied to the cement pool supply pipe (6) is the excavation rod of the lower side through the connecting end pipe (35) welded to the small diameter connecting portion (31b) of the female joint (3b) mounted on the lower drilling rod (3) of the upper side It is supplied to the cement pool supply pipe 6 provided in (3-1).

That is, as shown in FIG. 8, the female joint 3a mounted at the upper end of the lower drilling rod 3-1 is inserted into and connected to the female joint 3b mounted at the lower end of the upper drilling rod 3. At this time, the connecting pipe 35 welded to the small diameter connecting portion 31b of the female joint 3b mounted on the lower end of the upper drilling rod 3 is mounted on the upper end of the lower drilling rod 3-1. Cement pool supply pipe that is connected in the state of being inserted into the small diameter connecting portion (31a) of the coupling, and connecting the water joint (3a) and the female joint (3b) mounted on the upper and lower ends of the upper drilling rod (3) 6) The cement paste is supplied to the cement pool supply pipe (6) connecting the water joint (3a) of the upper end of the excavating rod (3-1) and the female joint (3b) of the lower side.

Therefore, the cement paste supplied through the cement pool supply swivel 17 installed above the main shaft 2 of the ground excavator 1 is continuously connected vertically in a multistage phase to the lower end of the main shaft 2. It is discharged toward the excavated earth and sand while being supplied to the auger head and the like through a plurality of cement pool supply pipes (6) connected vertically while being installed in each of the plurality of excavating rod (3).

Next, a plurality of excavations in which pneumatic pressure supplied through the pneumatic supply swivel 4 connected to the upper end 21 of the main shaft 2 is assembled and connected in multiple stages to the lower end 22 of the main shaft 2. Next, the process of supplying the gas through the inside of the rod 3 step by step will be described.

The pneumatic pressure injected through the pneumatic inlet 43 formed at one side of the outer cylinder 41 of the pneumatic swivel 4 is connected to the annular passage 44 formed at the upper end 21 of the main shaft 2. Is supplied to the pneumatic passage 24 formed in the center of the main shaft (2), the pneumatic pressure supplied to the pneumatic passage (24) is connected to the expansion pipe (29) formed at the bottom of the pneumatic passage (24) It is discharged through a plurality of connecting holes 20 formed at a predetermined interval around the center hole 27 of the female joint 25, in this case is mounted on the top of the excavating rod (3) inserted into the female joint (25) The male joint 3a is connected to the female joint 25 in a state of elastically compressing the ring-shaped packing 5a inherent in the bottom of the plurality of connecting holes 20, and at the same time, the male joint 3a of the male joint 3a is A plurality of connecting holes 33 formed at regular intervals around the small diameter connecting portion 31a are formed in the ring-shaped packing 5a. The number of metal ring 51, a plurality of connecting holes 20 formed in the above-mentioned arm joint 25 is connected through the status for each (see Fig. 7)

Therefore, the pneumatic pressure supplied to the pneumatic passage 24 of the main shaft 2 is a plurality of connecting holes 20 connected to the expansion pipe 29 and a plurality of metal rings 51 formed in the ring-shaped packing (5a) and Through the plurality of connecting holes 33 formed in the water joint (3a) is to be supplied into the upper drilling rod (3).

On the other hand, as described above, the pneumatic pressure supplied to the upper excavation rod (3) is a plurality of through holes formed in each of the upper, middle, lower support plates (7a, 7b, 7c) installed to support the cement pool supply pipe (6) 72, 73 acts on the check valve 8 elastically installed on the bottom side of the lower support plate (7c), wherein the pneumatic pressure supplied to the inside of the drilling rod (3) elastically supports the check valve (8) If the spring 81 is larger than the elasticity of the spring 81, the pneumatic pressure supplied to the drilling rod 3 pushes down the check valve 8 which seals the plurality of through holes 73 formed in the lower support plate 7c downward. Accordingly, the check valve 8 opens the plurality of through holes 73 while compressing the spring 81.

As described above, when the check valve 8 elastically installed at the bottom of the lower support plate 7c of the upper drilling rod 3 is opened as shown in the virtual line of FIG. 8, the female joint (the lower end of the upper drilling rod 3) is opened. The plurality of connecting holes 36 formed in the 3b), the plurality of metal rings 51 formed in the ring-shaped packing 5b, and the plurality of connecting holes formed in the water joint 3a of the upper end of the excavating rod 3-1. 33 are to be connected to each other, so that the pneumatic pressure supplied into the upper drilling rod 3 is supplied to the lower drilling rod 3-1 through the open check valve (8) Will be.

Therefore, the ground excavation device 1 of the present invention is connected to the plurality of excavating rods 3 to the lower end 22 of the main shaft 2 in multiple stages to perform the ground excavation, the upper end of the main shaft 2 The cement pool and the pneumatic pressure supplied from the outside through the cement pool supply swivel 17 and the pneumatic supply swivel (4) installed in the up and down at the same time can be supplied to the main shaft (2) at the same time, and the cement supplied at the same time Pools and pneumatics can be fed through different passages so as not to mix with each other. For example, the cement paste is supplied through the cement paste supply pipe 23 inserted into the pneumatic passage 24 of the main shaft 2 and the cement paste supply pipe 6 installed inside the drilling rod 3. Pneumatic pressure is supplied through the inside of the pneumatic passage 24 and the drilling rod 3 formed in the center of the main shaft (2).

Therefore, the ground excavation device (1) of the present invention is the auger head attached to the bottom of the excavating rod is installed at the bottom of the plurality of excavating rod (3) installed in the multi-stage connected to the main side (2) for the soft ground improvement work When excavating the soft ground, the cement pool and the pneumatic pressure can be discharged at the same time, or the pneumatic and excavation to operate the hammer drill even when the ground drilling work is carried out with the hammer drill mounted on the lowermost drilling rod (3). It will be possible to supply cement paste at the same time for mixing in the soil.

1: Ground Excavator 11: Motor
12: planetary gear reducer 13: deceleration output shaft
14: gear box 15: drive gear
16: interlocking gear 17: swivel for supplying cement paste
18: cement paste injection passage 2: the main shaft
20: connecting hole 21,22: upper and lower
23: cement pool supply pipe 24: pneumatic passage
25: Female joint 26: Flange for connection
27: center hole 28: connector
29: expansion part 3,3-1: excavation rod
3a: male joint 3b: female joint
31a, 31b: small diameter connecting portion 32: large diameter connecting passage
33,36: Connecting hole 34: Connecting passage
35: connector 37: nipple
38: cleaning tool 4: swivel for pneumatic supply
41: outer cylinder 42: cover
43: pneumatic inlet 44,45: annular passage and connecting passage
5a, 5b: Ring type 51: Metal ring
6: cement pool supply pipe 7a, 7b, 7c: upper, middle, lower support plate
71, 72, 73: through hole 8: check valve
81: Spring

Claims (6)

Rotating the auger drive unit in which the motor 11 and the planetary gear reducer 12 which reduce the rotational speed of the motor are integrally assembled, and the reduction output shaft 13 protruding to the lower end of the planetary gear reducer of the auger drive unit. A gearbox 14 connected to the lower end of the planetary gear reducer so as to be supported, a drive gear 15 which is affixed to the reduction output shaft of the planetary gear reducer to be rotatable inside the gearbox, and the reduction output shaft. Main shaft (2) rotatably installed in the gear box while being spaced apart at a predetermined interval with respect to, the interlocking gear (16) is fixed to the main shaft (2) to be engaged with the drive gear, and above the gear box It is connected to the upper end of the main shaft so as to position the cement pool supply swivel (17) for supplying cement paste, and connected to the female joint (25) attached to the lower end of the main shaft It is according to Soil drilling apparatus consisting of drilling rods (3),
It is installed between the upper surface of the gear box 14 and the cement pool supply swivel 17 for pneumatic supply for supplying air pressure separately from the cement pool supply swivel 17 for supplying cement paste Further comprising a swivel (4), the pneumatic supply swivel (4) is configured to rotatably wrap the upper end 21 of the main shaft (2) protruding higher than the upper surface of the gear box (14) Formed,
In the center of the main shaft (2) is formed a pneumatic passage (24) having a larger diameter than the cement paste supply pipe 23 is installed to be connected to the cement paste injection passage 18 of the cement pool supply swivel 17 And
An upper end 21 of the main shaft 2 has an annular passage 44 connected to the pneumatic inlet 43 of the swivel 4 for pneumatic supply and a connection connecting the annular passage 44 and the pneumatic passage 45. A passage 45 is formed,
The upper end of the cement pool supply pipe 23 is connected to the cover 42 of the swivel 4 for pneumatic supply, the lower end of the cement pool supply pipe 23 is connected to the lower end 22 of the main shaft (2) Is formed in a structure connected to the central hole 27 formed in the center of the arm joint 25,
The lower end 22 of the main shaft 2 is formed with an expansion pipe 29 for extending the pneumatic passage 24 in the shape of a fallopian tube,
A ground excavation device, characterized in that the female joint (25) connected to the lower end of the main shaft (2) is formed with a plurality of connection holes (20) connected to the expansion pipe (29) formed under the pneumatic passage (24). .
The method of claim 1,
The upper end of the drilling rod (3) is equipped with a male joint (3a) is inserted into the female joint (25) of the main shaft (2), the female joint (3a) of the female joint (2) of the main shaft (2) 25) and the small diameter connecting portion 31a to which the connecting end pipe 28 formed at the bottom of the center hole 27 is detachably connected and at the same time the upper end of the cement paste supply pipe 6 installed in the excavating rod 3 is fixedly connected. The large diameter connecting passage 32 formed to have a diameter larger than that of the cement paste supply pipe 6 at the lower end of the small diameter connecting portion, and the plurality of connecting holes 20 formed in the female joint 25 are connected to each other. A plurality of connecting holes 33 formed at predetermined intervals around the small diameter connecting portion 31a and a plurality of connecting passages 34 connecting the upper side of the large diameter connecting passage 32 and the lower side of the plurality of connecting holes 33. Ground excavation device, characterized in that is formed.
The method of claim 1,
The lower end of the excavating rod (3) is equipped with a female joint (3b) is inserted into the water joint (3a) mounted on the upper end, the cement joint (3b) is installed in the interior of the excavating rod (3) Removable small diameter connecting portion 31b to which the lower end of the pool supply pipe 6 is fixedly connected, and small diameter connecting portion 31a of the water joint 3a mounted on the upper end of the drilling rod 3 while being fixedly connected to the small diameter connecting portion. Soil excavation device, characterized in that a plurality of connecting holes (36) formed at a predetermined interval around the connecting end pipe (35) and the small diameter connecting portion (31b) to be connected.
The method of claim 1,
The drilling rod 3 is welded to the upper, middle and lower support plates 7a, 7b, 7c supporting the cement pool supply pipe 6 with a plurality of through holes 71, 72, 73 formed at a predetermined interval therein. And a check valve 8 for opening and closing the plurality of through holes 73 formed in the lower support plate 7c while being elastically supported by the spring 81 is installed at the bottom of the lower support plate 7c. Ground excavation device characterized in that.
The method of claim 1,
A plurality of connection holes 20 and 36 formed at each of the female joint 25 connected to the lower end 22 of the main shaft 2 and the female joint 3b mounted at the lower end of the drilling rod 3. Ring-shaped packings 5a and 5b are inherent to each other, and the ring-shaped packings 5a and 5b connect a plurality of connecting holes formed in each of the female joints 25, 3b and the male joint 3a. Ground excavation device, characterized in that a plurality of metal ring (51) for mounting.
The method of claim 1,
On the lower end of the excavating rod 3 between the upper surface of the female joint 3b mounted on the lower end of the excavating rod 3 and the lower support plate 7c, a cleaning tool 38 in which a nipple 37 is detachably screwed is provided. It is characterized by being provided.

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