KR20080010177A - In-casing rotary drill - Google Patents

Abstract

An in-casing rotary drill is provided to perform drill work if a crane with low pulling capacity enables to pull up a main body of an in-casing rotary drill, to cope with ground conditions and different diameter casing work easily and to have excellent drilling capacity, to let a user predict the drilling state and the quality of the soil in a casing and to change drilling tools easily according to working conditions. An in-casing rotary drill comprises a drill main body attached with a drilling tool, a horizontal rotary type band hose reel keeping an energy band line connected to the drill main body by a guide pulley tied to a crawler crane at the fixed tensile force, and a power pack supplying hydraulic pressure and electricity to the horizontal rotary type band hose reel. The drill main body comprises an outer slider box attached with thrust cylinders(11) operated in a vertical direction and provided with key insertion grooves at two sides, a clamp frame composed of a first clamp cylinder and a second clamp cylinder installed to the upper part of the outer slide box to operating in the left and right directions respectively and clamping plates(22a) installed to plungers of the first and second clamp cylinders, a hydro block installed on the upper part of the clamp frame to distribute hydraulic pressure supplied from the energy band line to the thrust cylinder, the hydro motor, the first clamp cylinder and the second clamp cylinder, a hydro box(30) provided with a lifting lug(32) and installed to the outside of the hydro block, an inner slide box installed to the outer slide box to slide in a vertical direction and provided with slide keys at two sides, a planetary gear box attached with a hydro motor and installed to the inside of the inner slide box, a rotary shaft provided with a key box and installed to the lower part of the planetary gear box, and a bearing housing attached to the lower part of the inner slide box and provided with brackets(51) connected with the plungers of the thrust cylinders installed to two sides of the outer slide box, wherein the slide keys of the inner slide box are inserted to the key insertion grooves of the outer slide box to guide the inner slide box moving vertically in the outer slide box and to prevent the inner slide box from rotating horizontally.

Description

In-Casing Rotary Drill}

1 and 1a is an explanatory view showing a state in which excavation work using a hammer grab (Hammer Grab).

Figure 2 is an explanatory diagram showing a state of excavation work using the RCD (Reverse Circulation Drill) equipment.

Figure 3 is an explanatory view showing a state in which excavation work using the in-casing rotary drill (In-Casing Rotary Drill) in the present invention.

4 is a perspective view of a press-fit rotary excavator body in the casing of the present invention;

5 is a side view of the press-fit rotary excavator body in the casing of the present invention.

Figure 6 is an explanatory view of the operating state of the press-fit rotary excavator body in the casing of the present invention.

7 is a cross-sectional view taken along the line AA ′ of FIG. 4.

8 is a cross-sectional view taken along the line BB ′ of FIG. 7.

9 is a cross-sectional view taken along the line CC ′ of FIG. 7.

10 is an explanatory diagram of an operating state of FIG. 7;

11 is a hydraulic line configuration of the press-fit rotary excavator body in the casing of the present invention.

12 and 13 are explanatory views showing the action of the indentation rotary excavator in the casing of the present invention.

14 is a view showing a state in which an auger is coupled to the excavator body according to the present invention as an example.

<Code Description of Main Parts of Drawing>

10. Outer slide box 10a. Insert Slide Key

11. Thrust cylinder 20. Clamp frame

21. First clamp cylinder 22. Second clamp cylinder

21a, 22a. Clamping Plate 30. Hydro Box

31. Hydro Block 32. Lifting Lug

40. Inner slide box 40a. Slide key

41. Planetary gearbox 41a. Hydro motor

42. Rotation axis 42a. Key box

50. Bearing housing 51. Bracket

100. Excavator Body 101. Crawler Crane

102. Guide pulley 103. Energy band wire

110. Left and right rotary band hose reel 120. Power pack

130. Drill bucket 140. Casing

210. Casing Oscillator 220. Casing Rotator

221. Hydraulic cylinder 300. Hammer grab

310. Body 320. Jaw

400. CD 410. Drive

411. Gearbox 412. Casing Clamp

413. Suction line 420. Drilling department

421. Drill Pipe 422. Stabilizer

423. Bitbody

The present invention relates to a press-fit rotary excavator in a casing, and more particularly, to an excavator body equipped with a drilling tool and an energy band line connected to the excavator body through a guide pulley attached to a crane. Left and right rotary band hose reel (Hand Reel) to maintain a constant tension and a power pack for supplying hydraulic and electricity to the left and right rotary band hose reel (Power Pack), such as by the excavator of the present invention In the excavation method, the excavator body is inserted into the casing, the excavator body is clamped to the casing inner wall, and then the drill bucket is pressed and rotated so that soil and stones are charged therein. Press-fitting in the casing using the method of lifting the excavator body by lifting it to the ground using a crane after clamping It is related to a conventional excavator.

In general, large diameter cast-in-placement piles are constructed to form bridge foundations, large building foundations, plant and tank foundations in a multi-layered or single-layered ground composed of soil, sand, gravel, or weathered rock. Casing oscillators or casing rotators and crawler cranes are mainly used.

Hereinafter, the casing oscillator and the casing rotator will be described with reference to FIGS. 1 and 1A.

The casing oscillator 210 is configured to clamp, press and draw the casing 140, and the clamping means is not only movable in the up and down direction but also able to rotate left and right at a predetermined angle according to oscillating. Consists of.

Referring to the state of use, as shown in Figure 1, the casing oscillator 210 is installed in the front of the crane 101, and clamping the vertical casing 140 through the clamping means of the casing oscillator 210 The clamped casing 140 is pushed into the ground while repeatedly rotating in the left and right directions. In this case, the clamping means pushes down the casing 140 downward, moves upward again in the state of releasing clamping, and then clamps the casing 140 again to continuously rotate and press the casing 140.

When the casing 140 is drawn out, the casing 140 inserted into the ground is rotated left and right through the clamping means and drawn upward in the same manner as described above.

On the other hand, as shown in Figure 1a, the casing rotator 220 is configured to function almost the same as the casing oscillator 210, but the casing rotator 220 after clamping the casing 140 in one direction Rotate continuously and the casing 140 is pressurized and drawn out into the ground, and each of the four corners of the casing rotator 220 is equipped with a powerful hydraulic cylinder 221, the press-in of the casing 140 And drawing efficiency is very good.

At the bottom of the casing 140, which is clamped to the casing oscillator 210 and the casing rotator 220, a plurality of bits are generally installed so that the ground or rock can be drilled when the casing 140 rotates. have.

In the above, the general equipment applicable to this invention was demonstrated. Hereinafter, a conventional excavator as compared with the present invention will be described in more detail.

Representative excavators mainly used in the current site include a hammer grab (300) and a reverse circulation drill (RCD) equipment (400).

First, as shown in FIG. 1 or 1A, the hammer grab 300 includes a body 310 having a plurality of pulleys installed therein and a jaw formed at a lower end of the body 310. Jaw) 320. The jaw 320 is symmetrically installed at both lower ends of the body portion 310 and is configured to be opened and closed by a wire connected through the pulley, and the body portion 310 of the hammer grab 300 is It is connected to the crane 101 via a wire.

Here, the hammer grab may use a single wire from one winch and a double wire from two winches, but a hammer grab using the double wire may be hammered into the ground, as described below. Excavation efficiency is very low because the earth and sand must be pumped up by simply opening and closing the grab without simply dropping the grab, and thus, a hammer hammer grab for disconnecting the hammer grab can be naturally dropped in the casing.

That is, the single hammer hammer grab naturally falls the hammer grab with the jaw open at the top of the casing to contain more soil in the jaw formed at the bottom thereof so that more soil is loaded into the jaw by the load. Doing.

However, when the large-diameter pile construction is required that the size of the hammer grab is large, accordingly, the weight of the soil sand and the hammer grab charged in the jaw also increases, so the hammer grab with a large total weight is lifted through a single wire. In order to do this, a crane with high lifting force is required.

However, such a high lifting crane is very expensive and expensive and time consuming during management, maintenance and movement, there is an inefficient problem.

In addition, when the groundwater fills up in the casing inserted into the ground, a great resistance is given to the naturally falling hammer grab and the drop acceleration is lowered, so that the drilling ability through the natural fall of the hammer grab as intended is remarkably lowered.

In addition, when the basement layer to be excavated is made of gravel and sand, when closing the encounter of the hammer grab, the gravel is sandwiched between the encounters, and all the sand flows out through the gaps, which is very inefficient and excavation. This will take a lot of time.

In addition to these problems, another problem is that it is very difficult for the driver to detect how much earth is contained in the hammer grab inserted into the casing as above, or the state of the soil layer in the casing. .

Next, the CD device 400 will be described.

As shown in FIG. 2, the CD device 400 is connected to a driving unit 410 consisting of a gearbox 411, a casing clamp 412, a suction line 413, and the like, and a lower portion of the driving unit 410. Drilling part 420 consisting of a drill pipe 421, a stabilizer 422 for preventing the bending of the drill pipe 421, a bit body 423 mounted on the lower end of the drill pipe 421 and formed with a plurality of bits It consists of).

In addition, the CD equipment 400, excavating the upper soil layer of the ground with a hammer grab 300, etc., after mounting the CD drive unit 410 on the casing 140, drill pipe 421 to the required depth It is connected to, and the bit body 423 mounted on the lower end of the drill pipe 421 to excavate the rock to excavate the rock and the circulated back with the circulating water through the air pressure is configured to discharge the equipment to the ground.

Such CD equipment has a very advantageous advantage in rock drilling. However, when excavating soil, there is a problem that the wall is collapsed and the equipment can be buried. Excavation of rock using expensive bits makes equipment cost and consumption of bits much uneconomical depending on the construction conditions. The problem is that the work is very cumbersome.

In addition, since the CD equipment performs excavation while connecting the drill pipe 421 to the required depth, the length of the drill pipe gradually becomes longer, so that the loss of rotational power increases.

In addition, when the rocking and soil layers are repeated when the excavation with the CD equipment, or if the earth and sand contains amber stone such as amber stones, the excavation is difficult, as well as the mobilized crane is in the working state while using the CD equipment There is a problem that the use burden of the crane is added.

Therefore, the present invention is to solve the problems in the prior art as described above, even if the crane with a small lifting capacity is capable of lifting the main body of the present invention (In-Casing Rotary Drill) within the working radius can also work with our crane It is possible to cope with ground condition and casing work of other diameters and have excellent excavation ability, and it is equipped with a display means to predict the excavation state and soil condition, and it is easy to replace the appropriate drilling tool according to the situation. The purpose is to provide a press-fit rotary excavator in a casing.

In order to achieve the above object, the press-fit rotary excavator of the present invention includes an outer slide box having a thrust cylinder mounted on left and right sides, a first clamp cylinder and a second clamp cylinder, and the first clamp cylinder. And a clamping plate installed on the plunger of the second clamp cylinder, the clamp frame provided on the upper portion of the outer slide box, the hydro block provided on the upper portion of the clamp frame, the hydro box provided on the outside of the hydro block; An inner slide box inserted into the outer slide box, a planetary gear box installed inside the inner slide box and equipped with a hydro motor at an upper portion thereof, and a lower portion of the planetary gear box installed at a lower portion of the outer slide box; A rotating shaft on which a key box is formed, the rotating shaft being fixedly rotated, An excavator body composed of a bearing housing mounted to a lower portion of the inner slide box;

A left and right rotary band hose reel for maintaining a constant tension of an energy band line connected to the excavator body through a guide pulley held by a crawler crane;

It is a press-fit rotary excavator in the casing, characterized in that consisting of; Power Pack for supplying hydraulic and electricity to the left and right rotary band hose reel.

Hereinafter, the configuration of the present invention will be described more clearly with reference to the accompanying drawings, the press-fit rotary excavator in the casing of the present invention, as shown in Figure 3, the excavator main body 100 is equipped with a drilling tool (Drilling Tool), Left and right rotary band hose reel (Band Hose Reel) to maintain a constant tension of the energy band line (103) connected to the excavator body 100 through the guide pulley 102 held by the crawler crane (101) 110 and a power pack 120 for supplying hydraulic pressure and electricity to the left and right rotary band hose reels 110.

As shown in FIGS. 4 to 10, an outer slide box 10 having thrust cylinders 11 operated in a vertical direction is mounted on left and right sides of the present invention. A first clamp cylinder 21 provided at an upper portion of the outer slide box 10 to operate in a left direction and a second clamp cylinder 22 installed to operate in a right direction, and the first and second clamp cylinders. Clamp frames 20 composed of clamping plates 21a and 22a respectively provided on the plungers of (21) and (22) are provided.

The thrust cylinder 11, the hydromotor 41a, the first clamp cylinder 21, and the second clamp of the excavator main body 100 are supplied with hydraulic pressure supplied from the energy band wire 103 to the upper portion of the clamp frame 20. A hydro block 31 for distributing and supplying the cylinder 22 is installed, and a hydro box 30 having a lifting lug 32 is formed on an upper surface of the hydro block 31.

The outer slide box 10 is provided with an inner slide box (Inner Slide Box) 40 that slides in the vertical direction therein, the inner side of the inner slide box 40 is equipped with a hydro motor (41a) The planetary gear box 41 is installed, the planetary gear box 41 is provided with a rotary shaft 42 formed with a key box (42a) at the bottom.

The rotating shaft 42 is fixedly rotated by a bearing housing 50 mounted below the inner slide box 40, brackets 51 are formed at both sides of the bearing housing 50, and the bracket 51 ) Are respectively connected to the plunger of the thrust cylinder 11 mounted on both sides of the outer slide box 10.

Meanwhile, as shown in FIG. 9, the outer slide box 10 has slide key insertion grooves 10a formed at both sides thereof, and slide keys 40a are formed at both sides of the outer circumferential surface of the inner slide box 40. The inner slide box 40 is inserted into the inner slide box 10 by inserting the slide key 40a of the inner slide box 40 into the key insertion groove 10a of the outer slide box 10. In order to be guided when moving up and down in addition to prevent the left and right rotation of the inner slide box (40).

The operation of the press-fit rotary excavator in the casing according to the present invention configured as described above will be described based on FIGS. 12 and 13 as an example.

As an example, when drilling is to be performed using a drill bucket (130), first, the drill bucket 130 is coupled to the key box 42a of the excavator body 100, and then the connection part is fixed with a pin.

Next, the wire connected to the winch of the crawler crane 101 is connected to the lifting lug 32 of the excavator body 100 to lift the excavator body 100.

On the other hand, the energy band wire 103 connected to the excavator body 100 is connected to the left and right rotary band hose reel 110 through the guide pulley 102 held by the crawler crane 101, the left and right rotary band hose The reel 110 receives hydraulic power and electricity from the power pack 120, and supplies the reel 110 to the excavator body 100 through the energy band wire 103.

Subsequently, the casing 140 is vertically clamped through the casing oscillator 210 or the casing rotator 220 installed on the front surface of the crawler crane 101 to a predetermined depth in the ground.

Next, after inserting the excavator main body 100 into the casing 140 until the drill bucket 130 mounted on the excavator main body 100 reaches the ground, the first clamp of the excavator main body 100 The inner circumferential surface of the casing 140 is the clamp plates 21a and 22a installed in the first clamp cylinder 21 and the second clamp cylinder 22 by operating the cylinder 21 and the second clamp cylinder 22, respectively. Make sure it is securely attached to the

Next, by operating the hydro motor (41a) of the excavator body 100 to rotate the drill bucket 130 coupled to the rotary shaft 42 and the thrust cylinder (11) mounted on both sides of the excavator body (100) ) To push the inner slide box 40 downward from the outer slide box 10.

By this operation, the thrust cylinder 11 in the state in which the excavator main body 100 is fixed at a predetermined position inside the casing 140 by the first clamp cylinder 21 and the second clamp cylinder 22. As the inner slide box 40 is moved downwards by), the drilling bucket 130 coupled to the lower portion of the inner slide box 40 is pushed into the ground by the head of the thrust cylinder 11 to be excavated. You lose.

In addition, when discharging the earth and sand charged into the drill bucket 130 to the outside, the first clamp cylinder 21 and the second clamp cylinder 22 is returned to its original state, and then the excavator body 100 is casing 140. After lifting to the outside of the) to open the drill bucket 130 to discharge the soil.

Here, the drill bucket 130 is a rock bit (Rock Bit) is formed at the bottom thereof, when the drill bucket 130 is rotated in the state pressed on the ground, the earth and sand and sand into the drill bucket 130 It is a drilling tool to be charged.

On the other hand, a control box (not shown) connected to the excavator body 100 through the energy band line 103 is provided with an excavation stroke display window of the excavator body 100 so that the driver can excavate the excavator body 100. The condition may be predicted, and the control box may further include a pressure display window applied to the bit of the drill bucket 130 so that the driver may estimate the soil state in the casing 140.

According to the present invention as described above, even if the ground to be excavated consists of a sand layer or a gravel layer, it is possible to excavate up to 90m regardless of the large, depending on the site soil conditions drilling tools (drill bucket: drill bucket: auger) (Auger, Core Barrel) can be easily replaced.

In addition, excavation work is possible with a small lifting capacity crane, which reduces the operating cost of the crane, and can easily cope with ground conditions and casing work of other calibers, and has excellent excavation ability, as well as excavation state and excavation in the casing. The user can predict the condition of the soil, so that the user can take the action in real time, and can easily replace the drilling tools of the excavator according to the soil conditions, and provide the excavator with excellent drilling ability in the water. Can be.

Excavator of the present invention as described above not only has the advantages of the conventional hammer grab and RCD equipment, but also uses a double wire, so that the excavation work is possible if only the excavator body of the present invention can be lifted by a relatively small small lifting capacity crane. The equipment cost of the crane can be reduced, and it is easy to cope with the condition of the ground and the casing of other calibers within a certain range and has excellent excavation ability.

In addition, since the present invention does not extend the length of the rotary shaft according to the depth to be excavated as in the prior art, it is possible to transmit a strong rotary torque without the power loss due to the length of the rotary shaft is extended.

In addition, through the present invention, the user can predict the state of the excavation and the excavated soil in the casing through the present invention, the action can be taken in real time, and can easily replace the drilling tool of the excavator according to the conditions of the soil, In addition, the excavator of the present invention exhibits excellent drilling ability in water.

Claims (4)

An energy band line 103 connected to the excavator body 100 through an excavator body 100 equipped with a drilling tool and a guide pulley 102 held by the crawler crane 101. It consists of a left and right rotary band hose reel (110) for maintaining a constant tension and a power pack (120) for supplying hydraulic pressure and electricity to the left and right rotary band hose reel (110). A press-fit rotary excavator in a casing. The method of claim 1, The excavator body 100 includes: an outer slide box 10 having thrust cylinders 11 operated in up and down directions mounted on left and right sides; The first clamp cylinder 21 installed to operate in the left direction on the upper portion of the outer slide box 10 and the second clamp cylinder 22 installed to operate in the right direction, and the first and second clamp cylinder 21. A clamp frame 20 made of clamping plates 21a and 22a respectively provided at the plunger of 22; The thrust cylinder 11, the hydromotor 41a, the first clamp cylinder 21 of the excavator main body 100 are installed at the upper portion of the clamp frame 20 and supplied from the energy band wire 103. A hydro block 31 for distributing and supplying the second clamp cylinder 22; A hydro box 30 installed outside the hydro block 31 and having a lifting lug 32 formed on an upper surface thereof; An inner slide box 40 installed to slide upward and downward in the outer slide box 10; A planetary gear box 41 installed inside the inner slide box 40 and having a hydro motor 41a mounted thereon; A rotating shaft 42 installed in the planetary gear box 41 and having a key box 42a formed thereon; And a bearing housing 50 mounted below the inner slide box 40 and configured to fixedly rotate the rotating shaft 42. Brackets 51 are formed on both sides of the bearing housing 50, and the brackets 51 are connected to the plungers of the thrust cylinders 11 mounted on both sides of the outer slide box 10, respectively. Press-fitting rotary excavator in casing. The method of claim 2, The outer slide box 10 has slide key inserting grooves 10a formed at both sides thereof, and slide keys 40a are formed at both sides of the outer circumferential surface of the inner slide box 40 to form the inner slide box 40. The slide key (40a) is inserted into the key insertion groove (10a) of the outer slide box 10 so as to slide, the press-fit rotary excavator in the casing. The method of claim 1, The energy band wire 103 connected to the excavator body 100 is provided with a control box, and the control box is applied to a display window indicating the drilling stroke of the excavator body 100 and a bit of the drill bucket 130. A press-fit rotary excavator in the casing, characterized in that a display window for indicating the pressure is formed.

Images