KR20210050675A - Circular pile expansion excavating apparatus - Google Patents

Abstract

The present invention relates to an excavation apparatus for internal excavation of a circular tube that can be excavated by centrifugal force while extended wings are automatically deployed by friction with the ground. According to an embodiment of the present invention, the excavation apparatus for internal excavation of a circular tube comprises: an excavation shaft which is inserted into a circular tube penetrating into the ground and rotates; and at least one extension wing which is pivotally connected to one side of the excavation shaft and are deployed by friction with the ground while the excavation shaft is rotated.

Description

Excavation equipment for heavy excavation of circular pipes{CIRCULAR PILE EXPANSION EXCAVATING APPARATUS}

The present invention relates to an excavation apparatus for heavy excavation of a circular tube, and more particularly, a technique of excavating to insert a circular tube into the ground is disclosed.

In general, when a circular pipe such as a steel pipe or a concrete pile is driven into the ground, the rapid digging method (heavy drilling method) is sometimes used. This is a method in which an auger with a bit is inserted into the circular tube while rotating the tube and rotates inversely to each other and penetrates. At this time, the bit attached to the end of the auger excavates the ground, and the excavated soil goes up through the auger inserted inside the circular pipe and is discharged to the outside.

In this case, since the steel pipe is thin, the rapid digging method can be applied even if a general bit is used, but the concrete pile is thick, so if a general bit is used, the soil corresponding to the thickness of the concrete pile cannot be excavated. Therefore, there is a need for an expansion excavation device for heavy excavation of circular pipes.

As a background technology of the present invention, as Korean Patent Registration No. 10-0865688, a'digging device' has been proposed. This includes an outer rod, a rotation driving device for rotating the outer rod, and an inner rod inserted into the outer rod; An elevating device for raising and lowering the upper end of the inner rod, a rack formed under the inner rod and having at least a pair of rack tooth rows, and screwed with the rack tooth row, and a rotation shaft of the outer rod It characterized in that it comprises a pinion protruding outward and extending a central axis of the rotation shaft in the radial direction of the outer rod, and an enlarged blade formed at an end of the rotation shaft of the pinion.

As described above, the background technology has a complex structure with an external operation method in which power is transmitted from the top of the bit and the enlarged wings of the bit are spread through tooth-like coupling, thereby increasing the manufacturing cost. In addition, there is a problem that the fear of damage is increased because the two expansion blades receive the force of the expansion excavation.

The technical problem to be solved of the present invention is to provide an excavation apparatus for heavy excavation of a circular tube capable of excavating by centrifugal force while the expansion blades are automatically developed by friction with the ground.

In addition, it is to provide an excavation device for heavy excavation of circular pipes that can minimize interference between the expansion blades and the helical blades to minimize obstacles in transporting the excavated soil upwards.

In addition, it is to provide an excavation apparatus for heavy excavation of circular pipes that can adjust the excavation radius and increase excavation efficiency using a plurality of expansion blades.

In addition, it is to provide an excavation apparatus for heavy excavation of circular pipes that can improve excavation efficiency by excavating vertically downwards using pneumatic and expanding the excavation radius using expansion blades.

The excavation apparatus for heavy excavation of a circular pipe according to an embodiment of the present invention includes an excavation shaft that is inserted into a circular tube penetrated into the ground and rotates, and is pivotally connected to one side of the excavation shaft, and friction with the ground while the excavation shaft rotates. It includes at least one or more expansion blades deployed by.

In addition, it may further include at least one helical blade formed in a spiral shape along the outer circumferential surface of the excavation shaft, and transferring the excavated soil upward when the excavation shaft rotates.

In addition, the cross-section is formed to expand on the side of the excavation shaft in the form of a'┌┐' shape, the expansion blade and the rotationally coupled to limit the opening of the expansion blade from the excavation shaft to a predetermined angle may further include a connection. have.

In addition, it may further include a rotary wheel that is pivotally coupled to one end of the expansion wing and has a protruding member formed on an outer circumferential surface thereof.

In addition, the expansion blade may be rotationally coupled to an outer surface of the excavation shaft by a rotation shaft, and a rotation angle may be limited by at least one stopper formed on an outer surface of the excavation shaft.

Accordingly, it is possible to excavate by centrifugal force while the expansion blades are automatically deployed due to friction with the ground.

In addition, by minimizing the interference between the expansion blade and the helical blade, it is possible to minimize the obstacles in transferring the excavated soil upward.

In addition, it is possible to adjust the excavation radius and increase excavation efficiency by using a plurality of expansion blades.

In addition, it is possible to excavate vertically downward using pneumatic pressure, and increase the excavation radius by using the expansion blades, thereby improving excavation efficiency.

1 is a block diagram of an excavation apparatus for heavy excavation of a circular pipe according to an embodiment of the present invention.
FIG. 2 is an exemplary view for explaining a receiving groove formed in a shaft portion of an excavation shaft among the excavation apparatus for heavy excavation of a circular pipe according to FIG. 1.
3 and 4 are exemplary views for explaining that the expansion blades are deployed while the excavation device for heavy drilling of the circular pipe according to FIG. 1 is inserted into the circular pipe and moved.
5 and 6 are exemplary views for explaining that a connection part is inserted into the excavation apparatus for heavy excavation of a circular pipe according to FIG. 1.
FIG. 7 is an exemplary view for explaining that the expansion blades are connected to the outer surface of the excavation shaft in the excavation apparatus for heavy excavation of the circular pipe according to FIG. 1.
8 and 9 are exemplary views for explaining that the excavation radius is varied by the excavation apparatus for heavy excavation of a circular pipe according to FIG. 7.
10 is an exemplary view for explaining that a protruding member is formed on a rotating wheel in the excavation apparatus for heavy excavation of a circular pipe according to FIG. 7.
FIG. 11 is a configuration diagram for explaining further including a lower excavation part in the excavation apparatus for heavy excavation of a circular pipe according to FIG. 1.
12 is a detailed configuration diagram of the lower excavation portion according to FIG. 11.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms used are terms selected in consideration of functions in the embodiments, and the meaning of the terms may vary according to the intentions or precedents of users or operators. Therefore, the meaning of the terms used in the embodiments to be described later follows the definition when it is specifically defined in the present specification, and when there is no specific definition, it should be interpreted as the meaning generally recognized by those skilled in the art.

1 is a configuration diagram of an excavation apparatus for heavy excavation of a circular pipe according to an embodiment of the present invention, and FIG. 2 is an exemplary view for explaining a receiving groove formed on a shaft portion of an excavation shaft among the excavation apparatus for heavy excavation of a circular tube according to FIG. 1 3 and 4 are exemplary views for explaining that the expansion blades are deployed while the excavation device for heavy excavation of the circular pipe according to FIG. 1 is inserted into the circular pipe and moved.

1 to 4, the excavation apparatus 100 for heavy excavation of a circular pipe according to an embodiment of the present invention includes an excavation shaft 110 and an expansion blade 120. The excavation apparatus 100 for heavy excavation of a circular pipe is connected to an auger when the circular pipe penetrates the ground and is used for expansion excavation. In particular, when the circular pipe is made of a PHC pile, it is possible to facilitate penetration of the PHC pile by allowing expansion excavation in the ring-shaped projection area of the thickness t. In FIG. 1, (a) represents a state in which the expansion blades 120 are folded, and (b) represents a state in which the expansion blades 120 are deployed.

The excavation shaft 110 is coupled to the drill shaft of an auger and rotates. The excavation shaft 110 is inserted into a circular pipe penetrated into the ground and rotates to transmit rotational power. The excavation shaft 110 may be formed to a preset length, which may vary depending on the user's design. More specifically, the excavation shaft 110 includes a coupling portion 111 and a shaft portion 112. The coupling part 111 is formed in a polygonal structure in cross section so as to be coupled to the drill shaft. The shaft part 112 is connected to the expansion blade 120. In this case, the coupling portion 111 and the shaft portion 112 are formed coaxially, and cross-sections may be formed in different shapes. For example, the cross-section of the coupling portion 111 may be a hexagonal cross-section, and the cross-section of the shaft portion 112 may be a rectangular cross-section, but is not limited thereto.

In addition, at least one receiving groove 113 may be formed on one side of the shaft part. For example, a cross section of one side of the shaft part 112 may be formed in a'C' shape or a'D' shape. This is a structure for coupling the expansion blades 120 to the inside of the shaft part 112. For example, when the cross-section of one side of the shaft part 112 has a'C'-shaped structure, one side of the expansion blade 120 is accommodated in the receiving groove 113 on one side of the shaft part 112 and rotates. When one side of the shaft part 112 has a'ㄹ'-shaped structure, one side of the expansion blade 120 is accommodated in both receiving grooves 113 of the shaft part 112 and rotates. Accordingly, when the excavation shaft 110 is inserted into the circular pipe, its volume can be reduced, and the expansion blade 120 is expanded so that the soil excavated during rotation is sandwiched between the excavation shaft 110 and the expansion blade 120. This can minimize the problem.

The expansion blade 120 is pivotally connected to one side of the excavation shaft 110. The expansion blade 120 is formed of at least one or more, and is developed by friction with the ground while the excavation shaft 110 is rotated. The expansion blades 120 excavate with a wider radius of rotation than the circular pipe through the rotational power of the drilling shaft 110 to facilitate the ground insertion of the circular pipe. One side of the expansion blade 120 is pivotally coupled to one side of the excavation shaft 110 and is developed while being opened by a certain angle from the excavation shaft 110. In this case, the length of the expansion blade 120 may be varied according to a user's design. This is to vary the excavation range according to the size of the circular tube to be inserted. It is preferable that the plurality of expansion blades 120 are formed so as not to interfere with each other during deployment.

In addition, one side of the expansion blade 120 may be inserted into the receiving groove 113 of the shaft portion 112 of the excavation shaft 110 and rotated. In this case, at least one receiving groove 113 may be formed in the shaft part 112. For example, when the expansion blade 120 is folded on the shaft part 112, it may be opened at an angle of 15° to the shaft part 112. This is to automatically open the expansion blades 120 while rubbing against the ground by the centrifugal force caused by the rotation of the excavation shaft 110. In this case, one end of the receiving groove 113 of the shaft part 112 may be formed to be inclined so that the expansion blade 120 is at least wide open. When the expansion blade 120 is spread on the shaft part 112, it may be deployed up to a 90° angle with the shaft part 112. This is the maximum opening angle for excavation. In this case, the angle at which the expansion blade 120 opens up is limited by the end of the receiving groove 113 of the shaft part 112.

On the other hand, the excavation apparatus 100 for heavy excavation of a circular pipe according to an embodiment of the present invention may further include a helical blade 130. Helical wing 130 is formed in a spiral along the outer peripheral surface of the excavation shaft (110). The helical blade 130 serves to transport the excavated soil upward when the excavation shaft 110 rotates. Helical wing 130 may be formed of at least one or more. For example, when the helical blades 130 are formed in a pair, they may be formed around the shaft part 112 of the excavation shaft 110 by being rotated in the same spiral direction with a phase of 180 degrees to each other. The helical blade 130 may be formed so as not to interfere with each other with the expansion blade 120. However, when the plurality of expansion blades 120 overlap with the helical blades 130, the expansion blades 120 may not interfere with the deployment of the expansion blades 120 through the cutout groove 131 in the helical blades 130.

5 and 6 are exemplary views for explaining that a connection part is inserted into the excavation apparatus for heavy excavation of a circular pipe according to FIG. 1.

5 and 6, the excavation apparatus 100 for heavy excavation of a circular pipe according to an embodiment of the present invention may further include a connection part 140. In FIG. 5, (a) indicates that the expansion blades 120 are folded, and (b) indicates that the expansion blades 120 are unfolded.

The connection part 140 is formed to expand on the side of the excavation shaft 110 in the form of a'┌┐' shape in cross section. The connection part 140 is pivotally coupled with the expansion blade 120 to limit the expansion blade 120 to be opened from the excavation shaft 110 to a preset angle. For example, the connection part 140 may be formed at least one or more below the shaft part 112 of the excavation shaft 110. In this case, the expansion blade 120 is rotated along the open lower and side portions of the connection part 140. The expansion blade 120 is folded by rotating to the lower portion of the connecting portion 140, and is deployed while rotating to the side of the connecting portion 140. For example, when the expansion blade 120 is rotated to the lower part of the connection part 140, the angle of opening with the excavation shaft 110 is set to at least 15°, and when the expansion blade 120 is rotated toward the side of the connection part 140 The angle between the excavation shaft 110 and the gap may be set to a maximum of 90°.

In addition, when the helical blade 130 and the connection part 140 are formed at the same time, one side of the helical blade 130 is connected to one side of the connection part 140 to prevent interference between each other. In other words, the soil excavated through the expansion blades 120 is directly transferred upward along the helical blades 130. This is to prevent the soil excavated through the expansion blades 120 from intervening between the helical blades 130 and interfering with the transport. As the connection part 140 is formed on the side of the shaft part 112 of the excavation shaft 110, the length of the expansion blade 120 can be reduced compared to the case where it is directly connected to the shaft part 112. As the expansion blade 120 is formed on the outside of the excavation shaft 110 by the connection part 140, the rotation radius increases, so the length of the expansion blade 120 may be reduced to adjust the rotation radius.

7 is an exemplary view for explaining that the expansion blades are connected to the outer surface of the excavation shaft among the excavation apparatus for heavy excavation of the circular pipe according to FIG. 1, and FIGS. 8 and 9 are It is an exemplary view for explaining that the excavation radius is variable.

7 to 9, the expansion blade 120 of the excavation apparatus 100 for heavy excavation of a circular pipe can be pivotally coupled to the outer surface of the shaft portion 112 of the excavation shaft 110 by a rotation shaft 121. have. In this case, at least one stopper 114 formed on the outer surface of the shaft part 112 of the excavation shaft 110 may be formed to limit the spreading angle of the expansion blade 120. The stopper 114 may be formed in a pair so as to set the minimum opening angle (a1) and the maximum opening angle (a2). For example, when the shaft part 112 is formed in a square cross-section, four expansion blades 120 may be formed, and eight stoppers may be formed. The plurality of expansion blades 120 may be coupled to the shaft portion 112 on the same plane, but may be coupled to the other side.

For example, in the case of forming the four expansion blades 120, two may be formed on the upper side of the outer surface of the shaft part 112, and the other two may be formed on the lower side of the rear side surface of the shaft part 112. In this case, the lengths of the expansion blades 120 formed on the upper side and the expansion blades 120 formed on the lower side may be different from each other. For example, the length of the expansion blade 120 formed on the upper side may be formed to be longer than the length of the expansion blade 120 formed on the lower side. In other words, the rotation radius D1 of the upper expansion blade 120 is longer than the rotation radius D2 of the lower expansion blade 120. The upper expansion blade 120 and the lower expansion blade 120 may be arranged to have a 90° phase difference. Accordingly, it is possible to increase the excavation performance of the ground.

10 is an exemplary view for explaining that a protruding member is formed on a rotating wheel in the excavation apparatus for heavy excavation of a circular pipe according to FIG. 7.

Referring to FIG. 10, the excavation apparatus 100 for heavy excavation of a circular pipe according to an embodiment of the present invention may further include a rotating wheel 150.

The rotating wheel 150 is pivotally coupled to one end of the expansion blade 120, and a protruding member 151 is formed on the outer circumferential surface thereof. For example, the rotating wheel 150 may have a serrated or bullet-shaped protruding member 151 formed on an outer circumferential surface thereof. When the expansion blades 120 are formed in plural, it is also possible to form a rotation wheel 150 on each expansion blade 120. The rotating wheel 150 may be formed in the same shape as a pair of wheels with one expansion blade 120 interposed therebetween, but is not limited thereto. In addition to the one end of the expansion blade 120, the rotation wheel 150 may be formed in the middle. Accordingly, it is possible to facilitate the expansion blade 120 to be folded or unfolded, and to facilitate the excavation of the ground.

Such a rotating wheel 150 may be applied to the excavation apparatus 100 for heavy excavation of a circular pipe according to FIGS. 1 to 6, and may be used by adding a helical blade 130.

FIG. 11 is a configuration diagram for explaining further including a lower excavation unit in the excavation apparatus for heavy excavation of a circular pipe according to FIG. 1, and FIG. 12 is a detailed configuration diagram of the lower excavation unit according to FIG. 11.

11 and 12, the excavation apparatus 100 for heavy excavation of a circular pipe according to an embodiment of the present invention may further include a lower excavation part 160.

The lower excavation unit 160 is accommodated inside the shaft unit 111 of the excavation shaft 110 and serves to excavate the ground while moving the piston downward. Specifically, the lower drilling part 160 may further include a piston part 161 and a drill part 162 as shown in FIG. 12. The piston part 161 receives air from the outside and presses the drill part 162 with pneumatic pressure. The piston part 161 is located on the inner upper part of the shaft part 112 and moves. The striking force that the piston part 161 strikes the drill part 162 may vary according to user settings. One side of the drill part 162 is located below the inner side of the shaft part 112. The drill part 162 is hit by the piston part 161 to excavate the ground vertically downward. The drill part 162 has a side cross-section in the shape of a'ㅗ' shape, and the bottom surface may be formed with irregularities to facilitate excavation. The drill part 162 effectively excavates soil and weathered rock in the vertical direction, and by expanding the excavation radius by the expansion blade 120, more efficient excavation is possible.

This lower excavation part 160 can be applied to the excavation apparatus 100 for heavy excavation of circular pipes of FIGS. 1 to 10, and it is also possible to use a helical wing 130 in addition.

The present invention has been described above with reference to the drawings, but is not limited thereto. Accordingly, the present invention should be interpreted by the description of the claims intended to cover obvious modifications that can be derived from the described embodiments.

100: excavation device for heavy excavation of circular pipes
110: excavation shaft
111: coupling part
112: shaft part
113: receiving groove
114: stopper
120: expansion wing
121: pivot shaft
130: Helical wing
131: incision groove
140: connection
150: rotating wheel
151: protruding member
160: lower excavation part
161: piston part
162: drill part

Claims (5)

An excavation shaft that is inserted into a circular pipe penetrated into the ground and rotates; And
An excavation apparatus for a circular pipe, which is pivotally connected to one side of the excavation shaft, and includes at least one expansion blade that is developed by friction with the ground while the excavation shaft is rotated. The method of claim 1,
The drilling apparatus for a circular pipe further comprises at least one helical blade formed in a spiral shape along the outer circumferential surface of the drilling shaft and transferring the excavated soil upward when the drilling shaft rotates. The method according to claim 1 or 2,
Among the circular pipes further comprising a connecting portion having a cross section of a'┌┐' shape and extending on the side of the excavation shaft, and pivotally coupled with the expansion blade to limit the expansion of the expansion blade from the excavation shaft to a preset angle Excavation equipment for excavation. The method according to claim 1 or 2,
A circular pipe heavy excavation apparatus further comprising a rotation wheel which is pivotally coupled to one end of the expansion wing and has a protruding member formed on an outer circumferential surface thereof. The method according to claim 1 or 2,
The expansion wing,
An excavation apparatus for a circular pipe in which a rotation angle is limited by at least one stopper formed on an outer surface of the excavation shaft and rotationally coupled to an outer surface of the excavation shaft.

Images