JPH0712590U - Excavating sediment discharge guide structure of drilling machine - Google Patents

Abstract

(57) [Summary] [Purpose] Collect the excavated soil discharged from the outlet together with the compressed air in a narrow area without scattering. [Structure] An excavation bit is provided at a lower end of an elongated excavation device 30 which is vertically movable along a leader frame 20, and excavation soil excavated by the excavation bit is transported upward. A space S is formed vertically extending in the excavation device 30, and a discharge port 35a for discharging the excavated earth and sand conveyed in the earth and sand conveyance space S to the outside is formed on the outer surface of the upper part of the excavation device 30. A hemispherical guide member 36 that covers the discharge port 35a from above and guides the excavated earth and sand discharged from the discharge port 35a downward is attached to the excavation device 30 to form an excavated earth and sand discharge structure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drilling machine configured by arranging an elongated drilling device movably up and down along a leader frame hung from the tip of a boom or the like. The present invention relates to an excavated sediment discharge guide structure for discharging excavated sediment generated in excavating the ground in a predetermined direction.

[0002]

[Prior art]

 In such a drilling machine, the excavator is constructed in the shape of a long pipe, the excavation bit is arranged at the lower end of this pipe, and an air swivel or the like for supplying compressed air for driving to the excavation bit is installed in the excavator. There is one provided on the top. In this drilling machine, the drill bit is driven by the compressed air supplied from the compressor to the drill bit via the air swivel, and a vertical hole is drilled in the ground. The excavated soil (slime) generated by this excavation is conveyed to the upper part of the excavator through the pipe (that is, the space formed by vertically extending in the excavator), and from the discharge port at the upper part of the excavator. It is discharged to the outside.

[0003]

[Problems to be solved by the device]

 In this case, the excavated earth and sand discharged from the discharge port of the excavation equipment is expelled to the outside together with the compressed air, and if left as it is, the excavated earth and sand will be scattered over a wide area around the excavation equipment. In addition to the above, there is a problem that it takes time to process this excavated sediment.

The present invention has been made in view of such a problem, and provides an excavated earth and sand discharge guide structure for a drilling machine capable of collecting excavated earth and sand discharged together with compressed air from an outlet in a narrow range. The purpose is to provide.

[0005]

Means for Solving the Problems In order to achieve such an object, in the present invention, a drill bit is provided at the lower end of an elongated drilling device movably arranged above and below a leader frame. , A sediment transport space for transporting the excavated soil excavated by this excavation bit upward is formed vertically in the excavator, and the excavated sediment transported in the sediment transport space is discharged to the outside. An outlet is formed on the outer surface of the upper part of the excavator, and a hemispherical guide member that covers the discharge port from above and guides the excavated soil discharged from this discharge port to the excavator is attached to the excavator. It constitutes the discharge structure.

[0006]

[Action]

 When such an excavated earth and sand discharge structure is adopted, the excavated earth and sand generated by excavation by the excavation bit is carried upward together with the compressed air in the earth and sand carrying space, and is vigorously ejected to the outside from the discharge port. The excavated earth and sand ejected from the discharge port hits the inner surface of the hemispherical guide member, flows along the inner surface of the guide member, the ejection direction is changed downward, and is collected on the ground around the lower part of the excavator. For this reason, excavated soil is not scattered around and it is easy to treat discharged soil.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Fig. 1 shows a drilling work vehicle having an excavated sediment discharge guide structure according to the present invention. This well drilling work vehicle has a swing base 2 which is horizontally rotatable on a vehicle body 1b having a cabin 1a, and a telescopic boom 3 which is capable of hoisting on the swivel base 2 and which is mounted at the tip of the telescopic boom 3. It is configured by suspending the device D.

The telescopic boom 3 is composed of a base boom 3a that is mounted on the swivel base 2 so as to be capable of hoisting, and a tip boom 3b that is telescopically mounted on the base boom 3a so as to telescope. 4, a hoisting operation is performed, and a built-in telescopic cylinder (not shown) performs telescopic operation. Outriggers 8 that support the vehicle body 1b at the time of work are attached to four positions on the front, rear, left and right of the vehicle body 1b. An operator's seat 6 is provided on the rear side of the cabin 1a, and an operation lever 7 is provided so as to face the seat 6, and an operator sits on the seat 6 to operate the operation lever 7 to perform various operations For example, the turning operation of the swivel base 2, the raising and lowering operation of the telescopic boom 3, and the operation operation of the winch described later are performed.

A main winch 10 and a sub winch 15 are arranged on the upper surface of the base boom 3a. The main and sub wires 12 and 17 fed from these drums 11 and 16 are wound around sheaves 5a to 5d rotatably attached to a boom head 5 fixed to the tip of the tip boom 3b as shown in the figure. Hang down.

The main wire 12 is wound around the moving sheave 32 a at the upper end of the drilling device D, and the tip thereof is locked to the suspension head 21 attached to the boom head 5. Therefore, if the drive of the main winch 10 is controlled to control the feeding of the main wire 12 from the main drum 11, it is possible to perform the raising and lowering control of the excavation device 30 that constitutes the drilling device D. The sub wire 17 has a hook 18 at its tip and is hung from the boom head 5 and used for lifting various types of equipment.

The drilling device D includes the excavating device 30 which is vertically suspended and supported by the main wire 12 as described above, and the leader frame 20 which guides the excavating device 30. The leader frame 20 includes a suspension head 21 pivotally supported by a boom head 5 and supported by a pin 21a, a frame head 22 having a coupling portion 22a pivotally coupled to the suspension head 21, and a frame head. A first frame 23 that is integrally connected to 22 and extends vertically downward, a second frame 25 that is detachably connected to the first frame 23, and a second frame that is detachably connected to the second frame 25. 3 frames 26. The connecting portion 22a is formed in a hollow shape, and the main wire 12 extends downward through the hollow space of the connecting portion 22a, is hung around the moving sheave 32a and extends upward, and extends in the hollow space. It passes through again and is locked to the hanging head 21.

The first to third frames 23, 25, and 26 are hollow pipes extending vertically on both side edges of one side surface (side surface facing the excavation device 30) of a hollow columnar main body having a rectangular cross section. The guide rails 23a, 25a, 26a are joined together. The main body portion and the guide rail have the same cross-sectional shape, and a single vertically extending guide frame is formed in a state where the first to third frames 23, 25 and 26 are connected. Has become. A ground plate 26 is attached to the lower end of the third frame 26.

The excavator 30 is vertically movable with respect to the guide rails 23a, 25a, 26a. The excavator 30 is vertically movable along the leader frame 20 by the first to third support guides 31a, 31b, 31c which are attached to each other. Supported by.

A power swivel 33 is pivotally supported and attached to the first support guide 31 a, and a support member 32 rotatably connected to the power swivel 33 is mounted on the power swivel 33. A moving sheave 32a is rotatably attached to the member 32. The power swivel 33 is composed of a hydraulic motor and a speed reducer, and hydraulic hoses for supplying driving hydraulic pressure to the hydraulic motor and tubes 57a, 57b, 57c are connected to the power swivel 33 as shown in the figure. The hydraulic pressure is supplied from a hydraulic power unit (not shown) arranged in the vehicle body 1b.

Below the power swivel 33, an air swivel 35 is connected via a connecting tube 34. The air swivel 35 is supported by the leader frame 20 via the second support guide 31b. The air swivel 35 is rotatably supported by the second support guide 31b.

The air swivel 35 is connected to the lubricator 52 via an air hose and tubes 54 a, 54 b, 54 c, and is further connected to the air compressor 50 from the lubricator 52 via an air hose 51. Therefore, the compressed air supplied from the air compressor 50 is supplied to the air swivel 35 after being sent to the lubricator 52 to mix the lubricating oil in a mist state. The lubricator 52 is provided with an on / off valve for on / off controlling the supply of the compressed air, and an operating device 53 for remotely controlling the operation of the on / off valve is provided by the lubricator 52. It is arranged on top of.

As shown in detail in FIG. 2, the outer peripheral surface of the lower part of the air swivel 35 is provided with a plurality of discharges for discharging excavated soil (a mixture of soil and oil and called slime) generated by excavation to the outside. An outlet 35a is formed. Then, a hemispherical guide member 36 as shown in the drawing is attached so as to cover the discharge port 35a from above. The guide member 36 guides the excavated earth and sand discharged from the discharge port 35a along the inner surface 36a thereof as shown by an arrow A, and accumulates the excavated earth and sand below the excavation device 30.

A pipe P is attached to the lower end portion of the air swivel 35 by being screwed with a taper screw or the like. The pipe P is rotatably supported by a third support guide 31c at an intermediate portion. A connecting rod 38 extends downward from the inside of the air swivel 35 through the inside of the pipe P, and an air hammer excavating device B is attached to the lower end of the connecting rod 38 as shown in FIG. The connecting rod 38 has a passage for guiding the compressed air supplied to the air swivel 35 to the air hammer excavating device B, and the compressed air drives the air hammer excavating device B. In addition, the drive shaft of the power swivel 33 extends in the connecting tube 34 and is connected to the connecting rod 38, so that the power swivel 33 rotates the entire air hammer excavating device B via the connecting rod. There is.

As shown in FIG. 3, the air hammer excavating device B includes an air hammer mechanism 40, a hammer rod 41 vertically moved by the air hammer mechanism 40, and an excavating bit 42 connected to a lower end of the hammer rod 41. Composed of and. The air hammer mechanism 40 continuously vibrates the excavation bit 42 up and down via the hammer rod 41 by compressed air. A plurality of protrusions 42a are provided on the lower surface of the excavation bit 42, and the protrusions 42a continuously collide with the ground due to the vertical movement of the excavation bit 42, and give impact vibration to crush the ground. At this time, at the same time, the entire power hammer S is slowly rotated by the power swivel 33, the collision position of the protrusion 42a is changed according to this rotation, and the ground is gradually excavated into a cylindrical shape.

The air that has been supplied to the air hammer mechanism 40 to move the excavating bit 42 up and down is blown to the lower surface of the excavating bit 42, passes through the concave portion 42 b on the side surface of the excavating bit 42, and the air hammer mechanism 40 and the connecting rod. It flows upward in the earth and sand transportation space S surrounded by the outer peripheral surface of the pipe 38 and the inner peripheral surface of the pipe P, and flows out from the discharge port 35a to the outside. At this time, the lubricating oil mixed in the compressed air lubricates the collision portion between the protrusion 42a and the ground, and mixes with the excavated soil to form a slime, and the crushed soil is scattered as dust. Prevent. This slime is guided from the discharge port 35a by the guide member 36 as shown by the arrow A along with the compressed air and is discharged to the outside, where it is accumulated in the lower portion of the excavation device 30.

The excavating bit 42 is configured to be expandable and contractible in the radial direction (foldable), and when the excavating bit 42 is rotated in the excavating direction by the power swivel 33, the excavating bit 42 expands to the state shown in FIG. , A hole slightly larger than the outer diameter of the pipe P is excavated. When the excavation bit 42 is reversely rotated by the power swivel 33 at the completion of excavation, this is folded and contracted in the radial direction, and its outer diameter becomes smaller than the inner diameter of the pipe P. Therefore, by removing the screw connection between the pipe P and the air swivel 35 and then pulling up the entire excavation device 30, the excavation device 30 can be removed while leaving only the pipe P in the ground. As a result, the well can be excavated with the pipe P buried vertically.

[0022]

As described above, according to the present invention, the discharge port for discharging the excavated earth and sand conveyed in the earth and sand conveying space formed vertically extending in the excavator to the outside of the excavator. A hemispherical guide member, which is formed on the outer surface of the upper part, covers this discharge port from above and guides the excavated soil discharged from this discharge port downward, is attached to the excavation equipment to form the excavated sediment discharge structure. Therefore, the excavated earth and sand that is ejected from the discharge port together with the compressed air violently hits the inner surface of the hemispherical guide member, flows along the inner surface of this guide member, and the ejection direction is changed downward. Collected on the ground. For this reason, excavated soil is not scattered around and it is easy to treat discharged soil.

[Brief description of drawings]

FIG. 1 is a front view of a drilling work vehicle having an excavated sediment discharge guide structure according to the present invention.

FIG. 2 is a front view showing a lower portion of a well drilling device used in this well drilling work vehicle.

FIG. 3 is a partial cross-sectional view showing the air hammer excavation device attached to the lower end of the pipe.

[Explanation of symbols]

 2 Swivel base 3 Telescopic boom 10 Main winch 12 Main wire 20 Leader frame 30 Excavator 33 Power swivel 35 Air swivel 36 Guide member 40 Air hammer mechanism 42 Excavation bit 50 Compressor

Claims (1)

[Scope of utility model registration request] 1. A drilling well comprising a leader frame that is hung from the tip of a boom or the like and extends vertically, and is attached to the leader frame, and an elongated drilling device that is vertically movable along the leader frame. In the excavated earth and sand guide structure of the machine, an excavation bit is provided at the lower end of the excavation device, and a sediment transport space for conveying the excavated sediment generated by excavation by the excavation bit upwardly extends in the excavation device. A discharge port is formed on the outer surface of the upper part of the excavator, which discharges the excavated earth and sand transported in the sediment transfer space to the outside. The discharge port is covered from above and discharged from this discharge port. The excavated earth and sand discharge guide structure for a well drilling machine, wherein a hemispherical guide member for guiding the excavated earth and sand downward is attached to the excavator.