KR20200134923A - Device for enlarging excavation hole with air hammers - Google Patents

Abstract

According to the present invention, suggested is an expansion apparatus including a plurality of air hammers capable of hammering. The expansion apparatus of the present invention includes: a cylindrical body (20) including a plurality of hammer support grooves (22) having at least one part formed on a side wall; and a hydraulic cylinder (10) supported by the body (20), and including a piston rod (12) moved up and down by the inflow of oil. A plurality of hammers (32) perform hammering by high-pressure air supplied by an air supply pipe (39), a pin (Pa) is supported in the body (20) such that a part of a lower part can be individually unfolded outward through the hammer support grooves (22), and a bit (34) is mounted in the bottom. Link tools (16, 18) of the present invention enable the bottom of the plurality of hammers to be unfolded to the outside of the body (20) or folded to the inside of the body (20) through the hammer support grooves (22), in accordance with the ascending and descending of the piston rod of the hydraulic cylinder (10).

Description

Device for enlarging excavation hole with air hammers

The present invention relates to an expansion device for expanding the diameter of an excavation hole, and more particularly, to a expansion device configured to further expand the diameter of an excavation hole made of a constant diameter by using a plurality of air hammers.

In civil works, the size of the excavation hole made using a general excavation device has a direct relationship with the size of the excavation device. For example, since the excavation hole is formed using a plurality of bits mounted on the excavation device, there is inevitably a limit to the size of the excavation hole that can be excavated. Therefore, the excavation hole of a certain size or more uses special equipment, and in order to excavate a relatively large diameter with such equipment, there is a disadvantage that it takes a long time despite the use of expensive equipment.

In order to solve this disadvantage, a variety of bit assemblies having wing bits have been proposed, and as an example, Korean Patent Application No. 10-2014-0129354 may be cited. In general, a bit assembly having a wing bit for expansion has a complex structure in order to keep the wing bit unfolded. And since such a wing bit does not have a hammering function, a certain limit is inevitable in the efficiency of excavation work.

An object of the present invention is to provide an expansion factory value that is easy to expand the excavation hole molded to a predetermined size to a desired size.

Another object of the present invention is to provide an expansion factory value that is easy to adjust the size to expand the excavation hole.

Still another object of the present invention is to provide an expansion plant capable of supporting a plurality of hammers that perform hammering more firmly.

Expansion factory equipped with the air hammer of the present invention; A cylindrical body having a plurality of hammer support grooves at least partially formed on the sidewall; A hydraulic cylinder supported by the body and having a piston rod that moves up and down by the ingress of oil; The hammering operation can be performed by the high-pressure air supplied by the air supply pipe, the pin is supported inside the body, and a part of the lower part can be spread to the outside through the hammer support groove, respectively, and a bit is mounted at the lower end. A number of hammers; And, according to the descending and rising of the piston rod of the hydraulic cylinder, the lower end portions of the plurality of hammers are configured to include a link mechanism that can be expanded to the outside of the body through the hammer support groove or folded to the inside of the body.

And according to an embodiment of the link mechanism of the present invention, it is composed of a linking member installed at the lower end of the piston rod and interlocking, and the upper end is pin-connected to the linking member, the lower end is composed of a plurality of linking links pin-connected to the upper end of the hammer do. Here, by the lowering of the interlocking member, the interlocking link expands the lower end of the hammer to the outside of the hammer support groove, and the interlocking link folds the lower end of the hammer toward the inside of the hammer support groove by the rise of the interlocking member.

According to the present invention as described above, it is expected that an efficient expansion work can be basically performed by a plurality of hammers performing hammering and a body that rotates. That is, the hammer spreading outward of the body and the bit at the lower end thereof can efficiently perform the excavation work for expansion, so it is expected to have a sufficiently advantageous effect in the expansion work of a desired depth or less.

And according to the present invention, since the hammer performing hammering by high pressure air is supported between the hammer support grooves of the body, the excavation work for expansion by rotation of the body can be performed most stably. It is expected. That is, since the hammer can be firmly supported by the side of the hammer support groove when the body is rotated, it is expected that the efficiency of the expansion work can be sufficiently secured, and the reliability of the expansion device itself can also be sufficiently increased. I think I can.

1 is a perspective view illustrating the main parts of the present invention expansion apparatus.
Figure 2 is a cross-sectional view and a bottom view showing a closed state of the hammer in the present invention expansion apparatus.
Figure 3 is a cross-sectional view and a bottom view showing an open state of the hammer in the present invention expansion apparatus.
Figure 4 is a cross-sectional view and a bottom view of another embodiment of the present invention expansion apparatus.
Figure 5 is an explanatory view showing the operation of the present invention expansion apparatus by way of example.

Next, the present invention will be described in more detail based on the embodiment shown in the drawings.

As shown in FIG. 1 showing the main part of the expansion device of the present invention, the expansion factory value of the present invention includes a cylindrical body 20, and a plurality of hammers installed to protrude outwardly on the body 20. 32). And, as shown in Figure 2 showing the entire expansion device of the present invention in a longitudinal section, a cover 40 is installed on the upper side of the body 20, and a joint 2 is provided on the upper surface 42 of the cover 40. ) Is installed.

Through this joint 2, the body 20 is connected to an external device so that it can rotate. And since the joint 2 is actually a configuration that has been widely applied so far, a description of this part will be omitted. In this way, the rotational force of the external device transmitted through the joint 2 acts as a power to rotate the entire expansion device of the present invention. That is, the expansion factory value of the present invention is to perform the expansion work while rotating as a whole, and the configuration related to the rotation of the body 20 through the joint 2 is widely known and is currently used in various excavation devices, so detailed Description will be omitted.

In addition, the hydraulic cylinder 10 is supported in the vertical direction on the upper portion of the cylindrical body 20 (in the illustrated embodiment, the support plate 21 formed on the upper portion of the body 20). A piston rod 12 that performs a linear reciprocating motion in the vertical direction is installed under the hydraulic cylinder 10 by the operation of the hydraulic cylinder 10 (oil in and out).

The expansion plant of the present invention is provided with a plurality of hammers (32). In the illustrated embodiment, the hammer 32 is composed of four, and is installed to be symmetrical as can be seen from the bottom views of FIGS. 2 and 3. At the lower end of the hammer 32, a bit 34 for performing actual excavation is installed.

In the present invention, the hammer 32 is a part that performs hammering using supplied high-pressure air, and it can be said that it substantially performs excavation for expansion. Here, the supply of high-pressure air to the hammer 32 is supplied from the outside by the air supply pipe (39). In addition, since the hammering operation in which the bit 34 installed at the lower end performs a short reciprocating motion in the vertical direction using the high-pressure air supplied from the air supply pipe 39 is a substantially well-known configuration, a detailed description thereof will be omitted. do.

That is, according to the present invention, the cylindrical body 20 itself rotates by using external power connected through the joint 2, and at the same time, the hammer 32 also strikes the ground through a vertical reciprocating motion. It can be said that it is performed simultaneously. Here, it is natural that a plurality of tips with high hardness are installed on the bit 34 hitting the ground.

In addition, the plurality of hammers 32 of the present invention are for substantially performing the expansion work, and for such expansion work, the lower end of the hammer 32 is supported so as to be rotatable so that it can open outward. As shown in detail in FIG. 2, the middle portion of the hammer 32 is rotatably supported on the inner wall of the body 20. Looking at a specific configuration as an example, one side of the support bracket 36 installed in the middle of the hammer 32 having a cylindrical shape is a fixing bracket 28 and a pin (Pa) supported on the inner surface of the body 20 You can see that it is connected.

Therefore, the hammer 32 can rotate within a certain angle range with respect to the vertical direction so that the lower end of the hammer 32 can open outward, centering on the pin (Pa) disposed on the inner surface of the body 20. It can be seen that it is supported to be. With this configuration, in a state in which the hammer 32 is closed (a state in which the lower end of the hammer 32 is folded to the inside of the body 20 around the pin Pa), as shown in FIG. As shown, it can be seen that the hammer 32 can be in an unfolded state (a state in which the hammer 32 is unfolded outward with the lower end of the body 20 around the pin Pa).

In this way, the hydraulic cylinder 10 described above is used as a driving source for changing the posture of the hammer 32 from the closed state to the unfolded state. The piston rod 12 of the hydraulic cylinder 10 is connected to, for example, a plate-shaped linking member 16 so that it moves up and down while interlocking with the piston rod 12. Interlocking links 18 are installed between the upper ends of the interlocking member 16 and the plurality of hammers 32, respectively. The interlocking link 18 is connected to the hammer 32 and the interlocking member 16 and pins (Pb, Pc), respectively, and is installed to enable joint motion.

In the present invention, with respect to the movement of the piston rod 12 that descends or rises by the operation of the hydraulic cylinder 10, the plurality of hammers 32 rotate around the pin Pa, so that the lower end is outside the body 20. It is unfolded or folded into the body 20, and connecting them to each other may be referred to as the interlocking member 16 and the interlocking link 18. These interlocking members 16 and interlocking links 18 are. It will be fully understood by those of ordinary skill in the art that it can be said to be an exemplary configuration for a link mechanism for linking the piston rod 12 and the upper end of the hammer 32.

Here, as can be seen in FIG. 2, when the hammer 32 is folded inward, the interlocking link 18 has a state in which the lower end of the body 20 enters the inside of the body 20. Therefore, when the interlocking member 16 descends, the lower end of the hammer 32 opens outward with respect to the pin Pc, which means that the upper end of the hammer 32 moves inward with the pin Pc as the center. The same thing.

In the body 20 of the present invention, a plurality of hammer support grooves 22 are formed to correspond to the number of hammers 32 so as to correspond to the positions where the hammers 32 are installed. The hammer support groove 22 of the present invention is formed on the side wall 24a and the bottom surface 24b of the body 20 together. That is, the hammer support groove 22 is continuously formed in a state starting at a certain height of the side wall 24a and entering a certain distance inward from the bottom surface 24b.

Such a hammer support groove 22 can be said that the hammer 32 is accommodated therein. That is, as shown in FIG. 3, when the hammer 32 is spread outward, the hammer 32 is in a state in which the hammer support groove 22 of the side wall 24a is opened, and the hammer 32 is inside as shown in FIG. In the folded state, it is in the hammer support groove 22 of the bottom surface 24b.

In addition, the upper end portion 22a and the inner end portion 22b of the hammer support groove 22 have a function as a stopper that substantially regulates the upper and lower limits of the hammer 32. That is, when the hammer 32 is spread out (opened) the most outward, when the middle outer portion of the hammer 32 comes into contact with the upper end 22a of the hammer support groove 22, the hammer 32 opens further outward. Things are regulated. And when the hammer 32 is folded inward, when the inside of the middle portion of the hammer 32 comes into contact with the inner end portion 22b of the hammer support groove 22, it is prevented from being folded further inside.

In addition to the function as a stopper, the hammer support groove 22 of the present invention also has a function of supporting the hammer 32 itself. As described above, the cylindrical body 20 rotates by a rotational force transmitted from an external device through the joint 2, and with this rotation, the hammer 32 is supplied by the high pressure supplied through the air supply pipe 39. Hammering is being performed at the same time. The rotational force transmitted through the joint 2 rotates the cylindrical body 20.

According to the rotation of the body 20, a plurality of hammers 32 must also rotate. At this time, the rotation of the hammer 32 can be said to be substantially rotated along the rotation of the body 20. That is, a plurality of hammers 32 fitted into the hammer support groove 22 rotates with the body 20 according to the rotational force applied from one side of the hammer support groove 22 according to the rotation of the cylindrical body 20. will be.

Therefore, in the expansion apparatus of the present invention, it can be seen that the plurality of hammers 32 rotate together according to the rotation of the cylindrical body 20 in the state of being inserted into the hammer support groove 22, respectively. In addition, FIG. 4 shows an embodiment having the same basic configuration as the embodiment shown in FIG. 3, but having a different shape of the bit 34 mounted on the lower end of the hammer 32.

Next, the operation of the expansion device of the present invention having the above configuration will be described with reference to FIG. 5.

As shown in (a) of FIG. 5, the primary drilling of the excavation hole is formed by using a general excavation apparatus 50 to have an excavation hole having a predetermined diameter. Such a general excavation device 50 is also connected to the external device 60 through the joint 2 to perform a predetermined rotational motion is the same as the present invention.

When the molding of the drilling hole having a basic diameter using the general drilling device 50 is completed, the general drilling device 50 is pulled out upward, and the expansion factory value of the present invention is put into the drilling hole as shown in (b). do. At this time, the expansion factory value has a state in which a plurality of hammers 32 are folded, which is a state as shown in (a) of FIG. 2.

When the expansion device of the present invention, which is introduced into the drilling hole through the external device 60, reaches a desired depth, high-pressure air is supplied through the air supply pipe 39 and the cylindrical body 20 through the joint 2 Start spinning. In addition, while hydraulic pressure is supplied to the hydraulic cylinder 10, the piston rod 12 extends and moves downward.

And the descending of the piston rod 12 causes the interlocking member 16 to descend together. As can be seen in FIGS. 2 and 3, the descending of the interlocking member 16 acts to rotate the hammer 32 about the pin Pa through the interlocking link 18. In addition, the rotation of the hammer 32 may be said to substantially move in a direction in which the bit 34 installed at the lower end extends to the outside of the body 20.

That is, since the interlocking link 18 is set in a state in which the lower end is inclined (folded), when the interlocking member 16 descends, the lower end of the interlocking link 18 moves inward, and accordingly, the hammer 32 ) Is to be rotated around the pin (Pa) so that the bit 34 of the lower end is open to the outside. In addition, when the piston rod 12 descends by a set degree and stops, the middle outer portion of the hammer 32 comes into contact with the upper end 22a of the hammer support groove 22 and is prevented from further opening.

When the excavation operation proceeds in this state, the expansion device descends while rotation of the body 20 and hammering of the hammer 32 proceeds. And, as shown in (c) of Figure 5, while the expansion device is lowered to a depth to a depth required for expansion, the excavation operation can be performed. When the expansion work of a certain depth is completed, the plurality of hammers 32 of the expansion device must be folded inward.

The folding of the hammer 32 proceeds in the opposite direction to the unfolding process, and the hydraulic cylinder 10 operates to raise the piston rod 12, thereby raising the linkage member 16. And the interlocking link 18 is rotated clockwise as a whole while slightly rising as the interlocking member 16 rises, the lower end of the hammer 32 through the pin (Pc) is a bit around the pin (Pa) The hamber 32 is rotated so that the 34 moves inward.

And when the hydraulic cylinder 10 is completely raised, the hammer 32 is completely folded inside the body 20 as shown in FIG. 2. This state may also be referred to as a state in which the inner portion of the hammer 32 contacts the inner end portion 22b of the hammer support groove 22. In this way, when the hammer 32 is folded to the inside of the body 20, when it is completely removed from the excavation hole (when it is pulled up), the partial expansion work is completed in the lower part of the excavation hole as shown in (d) .

Here, it can be said that the expansion area of the expansion device of the present invention is determined based on the degree to which the hammer 32 is spread. As shown in FIG. 3, when the hammer 32 is fully unfolded, expansion of the largest area (diameter) will be possible. However, even if the hammer 32 is not fully extended outward, expansion work such as rotation of the body 20 will be possible within a range that can be supported inside the hammer support groove 22. That is, it will be appreciated that the degree of expansion may be variously determined according to the angle at which the hammer 32 is unfolded.

As described above, it can be seen that the present invention focuses on the fact that the hammer 32 is configured to allow the bit 34 installed at the lower end of the body 20 to open outward, thereby enabling the expansion work. have. It is considered natural that various modifications are possible within the technical scope of the present invention.

Looking at the basis of the basic idea of the present invention, the above-described support plate 21 may be defined as a structure for supporting the hydraulic cylinder 10 from the inside of the body 20, and various modifications within the scope of this basic function It is natural that it will be possible. And within a range in which the hammer 32 is rotated according to the descending of the piston rod 12 to expand the bit 34 outward, the link mechanism that can be substituted for the linking member 16 and the linking link 18 I think it is natural that various modifications are possible.

In addition, various modifications may be made to a configuration in which a plurality of hammers 32 are rotatably supported within the body 20 and a configuration in connection with the interlocking member 16 and the like. Another embodiment that can be considered is for the hammer support groove (22). In practice, the hammer 32 is for expansion, so it must be able to be spread out of the body 20. Therefore, it is believed that many modifications can be made with respect to the shape or formation position of the hammer support groove 22 within the range where excavation work for expansion is possible.

2 ..... joint
10 ..... Hydraulic cylinder
12 ..... piston rod
16 ..... Interlocking member
18 ..... Linked link
20 ..... body
21 ..... support plate
22 ..... Hammer support groove
22a ..... Upper part of hammer support groove
22b ..... inner end of hammer support groove
24a ..... side wall of the body
24b ..... bottom of body
32 ..... Hammer
34 ..... beat
40 ..... cover
42 ..... top of cover

Claims (2)

A cylindrical body 20 having a plurality of hammer support grooves 22 at least partially formed on the sidewalls;
A hydraulic cylinder 10 supported by the body 20 and having a piston rod 12 that moves up and down by the ingress of oil;
It has a bit 34 that performs a hammering operation by the high-pressure air supplied by the air supply pipe 39, and a pin (Pa) is supported inside the body 20 and rotates while supporting a part of the hammer. A plurality of hammers 32 that can be spread outward, respectively, through the grooves 22; And
A link mechanism that allows the lower ends of a plurality of hammers to expand to the outside of the body 20 through the hammer support groove 22 or to be folded into the body 20 according to the descending and rising of the piston rod of the hydraulic cylinder 10 Expansion device having a plurality of air hammers including a.
The method of claim 1, wherein the link mechanism,
An interlocking member 16 installed at the lower end of the piston rod 12 and interlocking,
The upper end is connected to the linking member 16 and the pin, the lower end is composed of a plurality of linking links that are connected to the upper end of the hammer and the pin,
The interlocking link expands the lower end of the hammer to the outside of the hammer support groove 22 by the lowering of the interlocking member, and the interlocking link expands the lower end of the hammer to the inside of the hammer support groove 22. Expansion device provided with a hammer.

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