KR20190125601A - Expansion excavating device for circular pile - Google Patents

Abstract

The present invention provides an expansion excavation device for circular pipe excavation which facilitates penetration of a thick concrete pile, simplifies an expansion wing slid by a centrifugal force and a force pushing the ground to facilitate manufacture, effectively allows a sliding motion of an expansion wing, sequentially widens expansion areas, and distributes excavation power to a plurality of expansion wings to reduce a possibility of damage to expansion wings. According to a proper embodiment of the present invention, the expansion excavation device comprises: an excavation shaft having a rotation operation unit coupled to a drill shaft of auger equipment during ground penetration of a circular pipe, and a wing shaft unit concentrically integrated into the rotation operation unit and chamfered into a rectangular cross section; a pair of helical transport wings having a phase of 180 degrees on a circumference of the shaft unit and rotating in the same helical direction to transport excavated soil upwards; a pair of lower expansion wings which have a prescribed radius of rotation by allowing one end thereof to be pivot-connected to a lower portion of the wing shaft unit by a lower pivot shaft forming a right angle with respect to the excavation shaft, and are installed at positions of 180 degrees to perform expansion excavation; and a lower expansion wing rotation inducing wheel rotatably connected to the other end of the lower expansion wings by a lower wheel shaft having a direction parallel with the lower pivot shaft.

Description

Expansion excavating device for circular pile {Expansion excavating device for circular pile}

The present invention relates to an expansion digging device used for constructing a circular pipe, and particularly easy to penetrate thick concrete piles, and to simply configure the expansion wing that is sliding by the centrifugal force and the force pushing the ground without external manipulation. Of the expansion rig for the circular pipe heavy excavator, which makes it easy to manufacture the excavation device, facilitates the sliding operation of the expansion blade, and reduces the possibility of damage of the expansion blade by allocating the digging force to the expansion blade. will be.

In general, when the circular pipes such as steel pipes or concrete piles are embedded in the ground, a quick digging method is used. This is a method of rotating a circular tube while inserting an auger equipped with a bit into the circular tube and rotating it in reverse rotation with each other. At this time, the bit attached to the end of the auger excavates the ground, and the excavated soil is lifted by the auger inserted into the circular tube and discharged to the outside.

In this case, the steel pipe is thin so that the fast drilling method can be applied even with a general bit, but the concrete pile has a thick flesh, so when a general bit is used, the soil corresponding to the concrete pile thickness cannot be excavated. Therefore, there is a need for an expansion digging device for a circular tube hollow.

As a background technology of the present invention, Korean Patent Registration No. 10-0865688 has been proposed 'excavation device'. It is an outer rod; A rotary drive device for rotating the outer rod, and an inner rod inserted into the outer rod; An elevating device for elevating an upper end of the inner rod up and down; A rack formed under the inner rod and having at least one pair of rack teeth; A pinion screwed with the rack tooth row and having a rotational axis projecting outwardly of the outer rod and a central axis of the rotational axis extending in the radial direction of the outer rod; And an enlarged wing formed at an end of the rotation shaft of the pinion.

As described above, the background art has a complicated structure by an external operation method in which an enlarged wing of the bit is spread through the tooth coupling by receiving power from the upper part of the bit, thereby increasing the manufacturing cost. In addition, there is a problem that there is a high risk of damage because the two expansion wings are subjected to the expansion excavation force.

Korea Patent Registration No. 10-0865688

The present invention facilitates the penetration of thick concrete piles, and is easy to manufacture by easily expanding the expansion wing that is operated by the centrifugal force and the force pushing the ground without external manipulation, smooth operation of the expansion wing The purpose of the present invention is to provide an expansion digging device for a circular tube heavy excavator, which can expand the expansion area sequentially and share the digging force with a plurality of extension wings to reduce the possibility of breakage of the extension blades.

Expansion digging apparatus according to a preferred embodiment of the present invention, the excavation shaft having a rotary shaft coupled to the drill shaft of the auger equipment when the ground penetration of the circular tube, the wing shaft portion chamfered in a square section coaxially integrated with the rotary shaft Wow; A pair of helical feed vanes having a phase of 180 degrees around the wing shaft portion and pivoted in the same spiral direction to transport the excavated soil upward; A pair of lower extension wings, one end of which is pivotally connected to the lower portion of the wing shaft portion through a lower pivot shaft that is perpendicular to the excavation shaft, is installed at a position of 180 degrees with a predetermined radius of rotation and is expanded; And a lower extension blade rotation induction wheel rotatably connected to the other end of the lower extension blade through a lower wheel shaft having a direction parallel to the lower pivot axis, respectively.

In addition, the lower extension blade is characterized in that the rotation is made in the range of the minimum opening angle and the maximum opening angle by the first lower stopper and the first upper stopper disposed around the lower pivot axis, respectively.

In addition, the upper portion of the wing shaft portion has a longer radius of rotation than the lower extension wings, and at the same time further comprises a pair of upper extension wings installed to rotate through the upper pivot axis 90 degrees phase with the lower extension wings; In addition, the upper extension blade rotary induction wheel that is rotatably connected to the other end of the upper extension blade through the upper wheel shaft having a direction in parallel with the upper pivot axis, respectively.

In addition, the upper extension blade is characterized in that the rotation is made in the range of the minimum opening angle and the maximum opening angle by the second lower stopper and the second upper stopper disposed around the upper pivot axis, respectively.

According to the expansion drilling device for a circular tube heavy excavation of the present invention, the lower extension wing is expanded at the front of the front end of the circular tube to expand the excavation can facilitate the penetration of thick concrete piles. In addition, the lower extension wing and the upper extension wing can be operated by the centrifugal force and the force pushing the ground without an external operation, and this makes it easy to manufacture the excavation device by simply configuring the upper and lower extension wings. In addition, when both the upper and lower extension wings are configured, the excavation area can be further widened, and the digging force is shared by a plurality of upper and lower extension wings to reduce the possibility of breakage of the extended wing.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
Figure 1a is a perspective view of the expansion pipe excavation device for a circular tube hollow in accordance with the present invention, both the upper and lower wings extended.
Figure 1b is a perspective view of the expansion pipe digging device for a hollow hollow tube according to the present invention, both the upper and lower wings are folded.
2 is a plan view in the state of FIG. 1A;
Figure 3 is an exemplary view showing an excavation state by applying the expansion rig for the circular pipe hollow excavation in accordance with the present invention to the circular pipe.
Figure 4 is an operation state when the expansion pipe digging device for hollow excavated circular tube according to the present invention flows into the inside of the circular tube.
Figures 5a and 5b is a perspective view and a front view in a state in which a bullet bit is installed in the expansion blade applied to the expansion rig for the circular tube hollow drilling according to the present invention.
Figure 6 is a perspective view of the circular digging medium digging device of Figure 1b from another angle.

In the following the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the embodiments presented are exemplary for a clear understanding of the present invention is not limited thereto.

Expansion drilling apparatus 10 according to an embodiment of the present invention is connected to the drill shaft 100 of the auger equipment when the ground penetration of the circular pipe 5, as shown in Figure 3 is used for expansion drilling. In particular, when the circular tube (5) is made of PHC piles can be made to expand the excavation in the ring-shaped projection area of the flesh thickness (t) to facilitate the penetration of the PHC piles.

As shown in FIGS. 1 to 3, the expansion excavator 10 includes an excavation shaft 12, a pair of helical feed vanes 14a and 14b, a pair of lower extension wings 18a and 18b, and a lower extension blade rotation induction. It is composed essentially of the wheel (20a, 20b).

The excavation shaft 12 has a rotating cross section 121 which has a polygonal cross section and is coupled to the drill shaft 100, and has a wing shaft 122 chamfered in a square cross section coaxially integrated with the rotating control section 121. . The pair of helical feed vanes 14a and 14b are rotated in the same spiral direction with phases of 180 degrees to each other around the wing shaft portion 122. Therefore, the earth and sand excavated according to the rotation of the excavation shaft 12 may be guided to the pair of helical feed vanes 14a and 14b to be transported upward. The pair of helical feed vanes 14a and 14b have grooves cut in a predetermined width in the middle so that a pair of lower extension wings 18a and 18b and a pair of upper extension wings 24a and 24b to be described later are unfolded. .

The pair of lower extension blades 18a and 18b is pivotally connected to the lower portion of the wing shaft portion 122 through a lower pivot shaft 16 having one end perpendicular to the excavation shaft 12. The pair of lower extension wings 18a and 18b have a constant rotation radius R1 and are provided at a position of 180 degrees with each other. The pair of lower extension wings 18a and 18b is configured in the shape of a rod, but is not limited thereto. Therefore, the pair of lower extension blades 18a and 18b may perform expansion excavation while rotating with the rotation radius R1 integrally with the excavation shaft 12. In this case, the pair of lower extension blades 18a and 18b may be further provided with a plurality of bullet bits 181 in addition to the lower portion as shown in FIGS. 5A and 5B. Since the pair of lower extension wings 18a and 18b have a rotation radius R1, the front end of the tip is excavated when the circular pipe 5 is inserted, so that the penetration of the PHC pile is particularly easy during the quick digging method. can do.

The lower extension blades 18a and 18b have a minimum opening angle that extends from the centerline of the drilling shaft 12 by the first lower stopper 17a and the first upper stopper 17b disposed around the lower pivot axis 16, respectively. It is comprised so that rotation may be made within the range of (alpha) 1 and the largest opening angle (alpha) 2. Accordingly, the lower extension wings 18a and 18b may be automatically unfolded by the maximum opening angle α2 by the rotary centrifugal force during excavation.

The minimum open angle α1 is 15 °, and the maximum open angle α2 is preferably 90 °. This is because it is difficult to rotate the lower extension wings 18a and 18b to open when the minimum opening angle α1 is smaller than 15 °, and no further expansion drilling is performed when the maximum opening angle α2 is larger than 90 °. to be.

The lower extension blade rotation induction wheels 20a and 20b are rotatably connected to the other ends of the lower extension blades 18a and 18b through lower wheel shafts 19 having parallel directions with the lower pivot shafts 16, respectively. Lower extension blade rotation guide wheel (20a, 20b) as shown in Figures 1 and 3 to configure the tooth-shaped teeth to increase the excavation efficiency on the outer peripheral surface, but is not limited thereto. The lower extension rotor wheels 20a and 20b may perform two functions. First, the spreading of lower extension wings 18a and 18b can be easily induced. That is, when the lower extension blades 18a and 18b are folded at the minimum angles, the lower extension blade rotation induction wheels 20a and 20b come into contact with the ground to rotate, so that the spreading of the lower extension wings 18a and 18b can be easily performed. You can do it. Second, as shown in FIG. 5, the bullet bit 181 may be installed on the outer circumferential surfaces of the lower extension blade rotation induction wheels 20a and 20b to increase the efficiency of expansion drilling.

On the other hand, the present expansion digging device 10 has a rotation radius (R2) longer in length than the lower extension wings (18a, 18b) on the top of the wing shaft portion 122, and at the same time the lower extension wings (18a, 18b) and It may further include a pair of upper extension wings (24a, 24b) having a 90-degree phase and installed to rotate through the upper pivot axis (22). At this time, the upper extension blade rotary guide wheels 26a and 26b which are rotatably connected to the other ends of the upper extension blades 24a and 24b through the upper wheel shaft 23 having a direction parallel to the upper pivot shaft 22, respectively. It can be configured to include.

Of course, a plurality of bullet bits 181 may be further installed in the lower portions of the upper extension wings 24a and 24b. In addition, the bullet bit 181 may be installed on the outer circumferential surfaces of the upper extension blade rotation guide wheels 26a and 26b to increase the drilling efficiency. The upper extension blade rotary induction wheels 26a and 26b serve to easily open the folded upper extension wings 24a and 24b.

The upper extension blades 24a and 24b are respectively the minimum opening angle β1 and the maximum opening angle β2 by the second lower stopper 23a and the second upper stopper 23b disposed around the upper pivot shaft 22, respectively. It is preferable to make the rotation within the range of. Accordingly, the upper extension wings 24a and 24b may be automatically unfolded by the maximum opening angle β2 by the rotational centrifugal force during the excavation.

Here, the minimum open angle β1 is 15 ° and the maximum open angle β2 is 90 °. This is because it is difficult to rotate the lower extension wings 18a and 18b to open when the minimum opening angle β1 is smaller than 15 °, and no further expansion drilling is performed when the maximum opening angle β2 is larger than 90 °. to be.

In this case, when the expansion digging device 10 additionally has upper extension wings 24a and 24b, a wider area A2 as shown in FIG. 2 in an area A1 in which the lower extension wings 18a and 18b can be excavated. Excavation can be carried out up to. Of course, a 'bit' may also be installed at the tip of the excavation shaft 12. In this case, three excavation regions are formed from the center to the outside by the expansion digging device 10.

As described above, the expansion digging device 10 according to the present invention does not require special manipulation from the outside during excavation propulsion, and the lower extension wings 18a and 18b and the upper extension wings 24a and 24b are automatically rotated and opened to expand the excavation. Since it is a simple structure made, it has the advantage that it can be easily manufactured. In particular, the excavation of the front end of the circular tube 5 is preceded by the lower extension blades 18a and 18b, so that the construction speed of the concrete pile can be increased by the quick digging method while reducing the penetration resistance.

In addition, the force received during the excavation is distributed through the lower wings (18a, 18b) and the upper wings (24a, 24b) can reduce the possibility of breakage of the expansion wings during the excavation.

In addition, as shown in Figure 4 after the excavation and pulling up the expansion digging device 10, the lower extension wings (18a, 18b) and the upper extension wings (24a, 24b) are in contact with the circular tube (5) automatically folded structure Discharge operation has the advantage of smooth.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art may make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The invention is not limited by the invention as such variations and modifications but only by the claims appended hereto.

12: excavation shaft
14a, 14b: helical feed vane
17a: first lower stopper
17b: first upper stopper
18a, 18b: lower extension wings
20a, 20b: Extension wheel rotary guide wheel
23a: second lower stopper
23b: second upper stopper
24a, 24b: upper extension wing
26a, 26b: Extension blade rotary induction wheel

Claims (4)

In the expansion drilling device 10 used for expansion drilling connected to the drill shaft 100 of the auger equipment when the ground penetration of the circular pipe (5),
An excavation shaft 12 having a rotation manipulation unit 121 coupled to the drill shaft 100 and a wing shaft portion 122 chamfered in a rectangular cross section coaxially integrated with the rotation manipulation unit 121;
A pair of helical feed vanes 14a and 14b which are rotated in the same spiral direction with the phases of 180 degrees around the wing shaft 122 to convey the excavated soil upward;
One end is connected to the lower portion of the wing shaft portion 122 through a lower pivot shaft 16 perpendicular to the excavation shaft 12 to have a constant rotation radius R1 and is installed at a position of 180 degrees to expand excavation. A pair of lower extension wings (18a, 18b);
Lower extension blade rotation guide wheels 20a and 20b rotatably connected to the other ends of the lower extension blades 18a and 18b, respectively, through lower wheel shafts 19 having a direction parallel to the lower pivot axis 16; Expanded drilling equipment for circular pipes, digging. The method of claim 1,
The lower extension blades 18a and 18b are respectively the minimum opening angle α1 and the maximum opening angle α2 by the first lower stopper 17a and the first upper stopper 17b disposed around the lower pivot axis 16. Expanded excavation device for a circular tube hollow drilling, characterized in that the rotation is made within the range of.
Here, the minimum open angle α1 is 15 ° and the maximum open angle α2 is 90 °. The method of claim 1,
The upper portion of the wing shaft portion 122 has a longer radius of rotation (R2) than the lower extension wings (18a, 18b), and at the same time has a 90-degree phase with the lower extension wings (18a, 18b) and the upper pivot shaft (22) It further comprises a pair of upper extension wings (24a, 24b) installed to be rotated through;
And upper extension blade rotation guide wheels 26a and 26b rotatably connected to the other ends of the upper extension wings 24a and 24b, respectively, through the upper wheel shaft 23 having a direction parallel to the upper pivot shaft 22, respectively. Extended excavation device for a circular tube hollow. The method of claim 3, wherein
The upper extension blades 24a and 24b are respectively the minimum opening angle β1 and the maximum opening angle β2 by the second lower stopper 23a and the second upper stopper 23b disposed around the upper pivot shaft 22, respectively. Expanded excavation device for a circular tube hollow drilling, characterized in that the rotation is made within the range of.
Here, the minimum open angle β1 is 15 ° and the maximum open angle β2 is 90 °.

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