KR200423506Y1 - Excavation bit with adjustable diameter - Google Patents

Abstract

The present invention relates to an outer diameter adjustable punch bit device which can simultaneously insert a casing into a hole already drilled in parallel with a drilling operation, thereby greatly reducing the earth anchoring process since the casing insertion process is unnecessary.

The present invention forms an excavation surface to excavate the rock and soil layer on the front, install the gutter moving part in the middle part of the front, insert the wing bit in this part and move in the circumferential direction to configure the outer diameter, the rear end It consists of a shank inserted into the hammer device supporting the impact force to the bit, the shank has a hollow shaft form to act as a passage for connecting the discharged air to the excavation surface after generating the impact force from the hammer device.

According to the present invention, by carrying out the drilling and casing at the same time, there is no need for equipment for inserting the casing, thereby reducing the civil engineering process and improving productivity.

Civil construction, bits, casings, rock and soil drilling, hammers

Description

Outer diameter adjustable punch bit device {EXCAVATION BIT WITH ADJUSTABLE DIAMETER}

1 is a block diagram showing a drilling method equipped with a bit according to the prior art;

2 to 4 are sequentially drilled with a bit according to the prior art

Illustrated cross section;

5 is an exploded perspective view showing an outer diameter adjustable drilling bit according to the present invention;

Figure 6 is a cross-sectional view showing the original state of the outer diameter adjustable drilling bit according to the present invention;

       7 is slightly larger than the outer diameter of the casing outer diameter adjustable drilling bit according to the present invention

       A cross-sectional view showing an open state;

Figure 8 is mounted on the drilling device with an outer diameter adjustable drilling bit device according to the present invention

During the process of simultaneously inserting the casing into the drilling hole together with the drilling operation,

Insert the outer diameter adjustable punch bit device according to the present invention into the casing

State diagram shown;

9 is mounted on the drilling device with the outer diameter adjustable drilling bit device according to the present invention

In the process of simultaneously inserting the casing into the drilling hole together with the drilling operation,

According to the outer diameter of the drill bit device is slightly larger than the outer diameter of the casing

A state diagram illustrating a state of excavating various grounds in a state;

10 is a variety of ground excavation with the outer diameter adjustable drilling bit apparatus according to the present invention

A state diagram showing a state of finishing lifting out of the casing;

Figure 11 when excavating with an outer diameter adjustable punch bit device according to the present invention,

Cross-sectional view showing the flow of air and thus the discharge of debris;

12 is a perspective view showing a conventional bit;

<Description of the symbols for the main parts of the drawings>

20: Shank 30a: Wing Bits 30b: Wing Bits

60: outer diameter adjustable bit 65: outer diameter adjustable bit device 70: hammer device

75: conventional bit 80: rotary head 85: master

90: drilling device 100: hammer device operation valve 110: air compressor

120: H-beam 130: earth plate 140: casing

The present invention in the earth anchor (EARTH ANCHOR) work of the basic civil engineering work, as shown in Figure 1 using the drilling device 90 to make a basement layer or reinforcement work so that the wall does not collapse after breaking to make a retaining wall It relates to an outer diameter adjustable drilling bit of an earth anchor work.

In general, the earth anchor work is 30 degrees downward as shown in FIG. 2 after the construction of the H-beam 120 and the earth plate 130 so that various grounds such as a rock layer, a soft layer, a stone layer, a sand layer, and a landfill layer do not collapse. H-beam 120 is inserted into the anchored body with a binding force by inserting a soft iron wire anchor at a predetermined depth and inserting a cemented grout solution into a predetermined depth. 작업 It is the work to apply the design tension to the tear layer to collapse.

More specifically, the hammer head 70 and the conventional bit 75 are lifted by pulling up the rotary head 80 mounted on the master 85 shown in FIG. 1 to insert a soft iron wire into the hole after drilling.

At this time, the soft layer, the stone layer, the sand layer, the buried layer, etc., the perforated hole is not maintained and collapsed, in order to prevent the fall, insert the casing 140 as shown in Figure 3, shown in Figure 4 As described above, the hammer device 70 equipped with the conventional bit 75 inside the casing 140 is excavated to a suitable depth by using the rotational force and the driving force of the rotary head 80, and the hammer equipped with the conventional bit 75 is installed. Lifting the device 70,

From this time, the casing 140 is forcibly pushed, the operation of repeating the operation of Figs. 3 to 4 to a predetermined depth until the section does not occur, the soft iron wire is inserted into the hole, and the cement grout solution is compressed and then the casing 140 is lifted. The process is completed.

In addition, if the ground collapses during the insertion of the casing 140, the work must be reworked and the construction cost increases.

The object of the present invention was devised to solve the conventional problems as described above, and the main purpose of the present invention is to insert the casing 140 at the same time while drilling, so that the holes drilled in various grounds such as a history layer, a landfill layer, etc. Of course not to fall,

It is to provide an outer diameter adjustable punch bit device that facilitates the insertion of a smooth casing 140 and is accurately installed at a design position.

In order to achieve the above object, the outer diameter adjustable boring bit device of the present invention is provided with a movable part of the trough 45 in the front middle portion of the outer diameter adjustable puncturing bit 60, as shown in FIG. Before the bits 30a and 30b are inserted, the fixing pins 40a and 40b are fixed to the wing bits 30a and 30b so as to prevent the wing bits 30a and 30b from escaping from the outer diameter-adjustable drilling bit 60. After insertion into 35a and 35b), the trough 45 is assembled to be movable in the circumferential direction,

The fixing pins 40a and 40b are assembled to the outer diameter adjustable drilling bit 60 in accordance with the linkage guide groove 20b of the shank 20, and the shank 20 fixing ball 57 is inserted into the ball insertion hole 56. Insert 28-30 pieces, block them with a ball leak-proof bolt (55), grab the outer diameter adjustable drilling bit (60) by hand and turn the shank (20) clockwise to increase the wing bits (30a, 30b) in the circumferential direction. It extends slightly larger than the outer diameter of 140, and when turned counterclockwise, the wing bits 30a, 30b enter the original position.

More specifically, as shown in FIG. 1, when the compressed air is supplied from the air compressor 110 to the punching device 90, and the valve for operating the hammer device 100 is opened, the hammer device 90 operates. When the piston 72 of the hammer device 70 shown in Fig. 11 impacts the striking surface 20a of the shank 20, the excavation surface 60b and the wing bits 30a and 30b of the outer diameter adjustable drilling bit 60 are applied. Impact force is transmitted to the front end (30c) of the crushing various ground,

At this time, the air flow is already crushed after the foot valve 20d and the air discharge passages 20e, 20f, and 60g are exhausted from the hammer device 70 after impacting the striking surface 20a of the shank 20. It will blow out the various fragments of the ground.

At this time, the generated debris is discharged out through the debris discharge passage (60h, 60i, 140i) of the outer diameter adjustable drilling bit 60, while the casing (140) due to the collapse of the ground in the soft layer, gypsum layer, sand layer, landfill layer, etc. ) Does not naturally enter into its own weight, in order to prevent this, the lower end portion 60c of the outer diameter adjustable boring bit 60 simultaneously presses the middle portion 150a of the casing shoe 150 while hitting the outer diameter adjusting boring bit ( The tip portion 60b of the 60 and the casing 140 are continuously excavated by the length of the casing 140 (generally 1.5 meters) without collapsing the hole while maintaining a constant gap.

In general, when the rock layer comes out, the casing 140 is stopped. In this case, when the rotary head 80 of FIG. 1 is turned about 90 degrees counterclockwise from the rotary head side, the interlocking guide groove 20b of FIG. The fixing pins 40a and 40b are attracted, and thus, the wing bits 30a and 30b are stored in the trough movable part 45 of the outer diameter adjustable drilling bit 60, and when the rotary head 80 is lifted, the casing 140 is pulled out. ), The hammer device 70 and the outer diameter adjustable drilling bit device 65 of the present invention are lifted together, and an anchor body, which is the next step, may be inserted.

As discussed above, the present invention can prevent the perforated hole from collapsing by simultaneously inserting the casing 140 together with the perforation, and there is no economic loss since reconstruction does not occur, and the work to be finished in the predetermined air is completed. It can be installed in the design position accurately.

Claims (5)

In the bit device for forming holes in various grounds by mounting to the drilling device 90 in the earth anchor working process of the basic civil engineering work, to form an excavation surface (60b) to excavate the rock and soil layer on the front, A gutter 45 movable part is installed in the middle part of the front side to insert wing bits 30a and 30b and move in the circumferential direction so that the outer diameter can be adjusted, and the rear end supports impact force on the excavating surfaces 60b and 30c of the bit. Is composed of the shank 20 is fixed to the hammer device 70, When the rotary head 80 is turned about 90 degrees clockwise as viewed from the rotary head side, the wing bits 30a and 30b become slightly larger than the outer diameter of the casing 140, and when turned about 90 degrees counterclockwise, the wing bits ( 30a and 30b are stored and configured to pass through the casing 140, Shank 20 is an outer diameter adjustable punch bit device characterized in that the hollow shaft form serves as a passage for connecting the air discharged after the hit from the hammer device 70 to the excavation surface (60b, 30c). The four pieces of debris discharge passages (60i) are provided on the outer circumferential side of the outer diameter-adjustable drill bit, two of which communicate with the excavation surface (60b), up to two of the vane bits (30a, 30b). External diameter adjustable punch bit device characterized in that it has a debris discharge passage. The fixed ball (57) according to claim 1 or 2, for retaining the engagement of the outer diameter-adjustable drilling bit and the shank (20), inserts 28 to 30, the size and number of which can be variously modified. Ordinary drill bit device, characterized in that the general or cylindrical shape. According to claim 3, wherein the fixing pin for preventing the departure of the wing bits (30a, 30b) (40a, 40b) is an outer diameter adjustable punch bit device, characterized in that the wing bits (30a, 30b) can be transformed into an integrated or general fixed key. 2. The wing bits 30a and 30b of the rotary head 80 rotate about 90 degrees counterclockwise as viewed from the rotary head side, so that the wing bits 30a and 30b are slightly larger than the outer diameter of the casing 140, and the clockwise direction is about 90 degrees. Turning also turning the outer diameter adjustable punch bit device, characterized in that the wing bits (30a, 30b) is stored and can be deformed to pass through the casing (140).

Images