JPH08326461A - Pipe guide device of hanging well drilling machine - Google Patents

Abstract

PURPOSE: To make it possible to replace easily a guide member whose inside diameter is proper to the diameter of a pipe to be buried and manufacture at low cost. CONSTITUTION: A grounding board 29, which forms a notched part 29a which is so wide that a pipe P may pass through, is mounted on the lower end of a leader frame 26 which guides the rising and falling movement of a drilling means installed to the outer periphery of the pipe P. A guide mounting shaft 29c is erected and installed on both sides of this notched part 29e. Removable holding pipes 139b and 239b are mounted on this guide mounting shaft 29e respectively, thereby constituting a pipe guide member 30 capable of guiding the pipe P in an integrally engaged state with a first guide member 139 and a second guide member 239 which may be divided. When the diameter of the pipe P to be guided is changed, only this pipe guide member is replaced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension drilling machine for vertically excavating the ground by suspending vertically from the upper portion of a supporting means such as a boom or a turret frame, and more specifically, excavating. The present invention relates to a pipe guide device that guides a pipe that is sometimes buried.

[0002]

2. Description of the Related Art As a well-known hanging well drilling machine, an excavator is suspended vertically from the upper end of a frame or boom assembled into a turret and installed at the lower end of this excavator. Some excavation means (excavation bits, drills, augers, etc.) excavate the ground vertically. This excavating device is configured to include excavating driving means (for example, a hydraulic motor), a drive rod screwed to the excavating motor and extending downward, and excavating means attached to a lower end of the drive rod.

The excavation drive means is constructed so as to be movable up and down along a leader frame which is vertically suspended from the upper end of a boom or the like, and is arranged so as to pass through a pipe also called a casing. This pipe is configured to be detachable from the excavation drive means. Then, the excavation means performs excavation together with the pipe, and by removing the excavation device leaving only the pipe in the ground, it is possible to excavate the well with only the pipe vertically buried. . Here, the pipes having different diameters (thicknesses) are used depending on the conditions of the well to be excavated.

In the excavator constructed as described above, the pipe can be vertically embedded as shown in FIG.
A pipe guide device 59 as shown in FIG. 2 is provided to guide the outer circumference of the pipe P at the lower end portion of the leader frame 26.

The pipe guide device 59 has a pipe guide member 59 formed so as to be freely divided into two parts in the front-rear direction.
a and a holding member 59b which is integrally connected to one of the pipe guide members 59a and is locked on both side surfaces of the leader frame 26. Then, it is necessary to replace the pipe guide device 59 according to the diameter of the pipe. This replacement is performed by removing the holding member 59b from the leader frame 26 after dividing the pipe guide member 59a.

[0006]

However, in the pipe guide device 59 configured as described above, the total weight of the pipe guide member 59a and the holding member 59b is more than 10 Kg, and therefore the work at the time of replacement is required. There was a problem that the labor of the person increased. Also, the pipe guide member 59a
It is necessary to prepare a plurality of pipes each having an inner diameter corresponding to the outer diameter of the pipe P.
Since it is formed integrally with the holding member 59b, there is a problem that it leads to an increase in production cost.

The present invention has been made in view of the above problems, and can be easily replaced with a guide member having an inner diameter suitable for the outer diameter of a pipe to be buried, and can be manufactured at low cost. An object of the present invention is to provide a pipe guide device for a hanging drilling machine.

[0008]

In order to achieve such an object, in the present invention, a drive rod is attached to the lower end of the excavation drive means which is suspended from the upper portion of the support means and is vertically moved up and down. Excavating means is attached to the lower end of the drive rod. Then, by driving the excavation means by the excavation drive means via the drive rod, a well drilling machine for excavating the ground is configured. Further, an embedded pipe is detachably arranged in the excavation drive means so that the drive rod can pass through the excavation drive means.

A leader frame is also suspended from the support means to guide the excavation drive means up and down. this,
A ground plate is attached to the lower end of the leader frame,
A pipe guide member, which is located on the outer periphery of the embedded pipe and vertically holds the embedded pipe, is detachably disposed on the ground plate.

By using the pipe guide device of the suspension drilling machine having such a structure, exchanging pipe guide members enables reliable guiding during excavation even for buried pipes having different outer diameters. it can. At this time, since only the pipe guide member needs to be replaced in accordance with the change in the diameter of the pipe, the replacement part can be manufactured at low cost and the weight of the replacement part can be reduced.

The pipe guide member may be divided vertically (forward or backward or left and right). In such a structure, the pipe guide member can be moved even after the buried pipe is brought into contact with the ground. The pipe guide member can be easily attached and detached from the outer peripheral direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a drilling work vehicle that is an example of a hanging drilling machine according to the present invention. In this well drilling vehicle, a horizontally swingable swivel base 2 is mounted on a vehicle body 1b having a cabin 1a, and a telescopic boom 3 is mounted on the swivel base 2 so that the swivel base 3 can be raised and lowered. It is configured by suspending the device D.

The telescopic boom 3 is mounted on the swivel base 2 so that it can be raised and lowered, and the tip boom 3b is telescopically attached to the base boom 3a.
The undulating cylinder 4 performs the undulating operation and the built-in extensible cylinder (not shown) performs the extensible operation.

Outriggers 8 that support the vehicle body 1b during work are attached to the vehicle body 1b at four front, rear, left, and right positions.
Further, the operator seat 6 is provided on the rear side of the cabin 1a, and the operation lever 7 is provided so as to face the seat 6, and the operator sits on the seat 6 to operate the operation lever 7 and Operation, for example, turning operation of the swivel base 2,
The up-and-down operation and extension / contraction operation of the telescopic boom 3 and the operation operation of a 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, 17 fed from these drums 11, 16 are attached to a sheave 5 rotatably attached to a boom head 5 fixed to the tip of the tip boom 3b.
It is hung around a to 5d as illustrated and hangs down.

The main wire 12 is wound around a moving sheave 32a at the upper end of the well drilling device D, and its tip is locked to a suspension head 21 attached to the boom head 5.
Therefore, if the drive of the main winch 10 is controlled to control the payout of the main wire 12 from the main drum 11, the excavation device 30 constituting the well drilling device D can be controlled to move up and down. A tension detecting mechanism for detecting the tension of the main wire 12 is provided on the base end boom 3a, but a description thereof will be omitted. The sub wire 17 has a hook 18 at the tip and is hung from the boom head 5 and used for lifting various equipment.

The drilling device D is composed of 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 the boom head 5 by pins 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 25.
And a third frame 26 detachably connected to the.

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 stretched around the moving sheave 32a and extends upward, and again within this hollow space. Through the hanging head 21
Is locked.

The first to third frames 23, 25, 26 are
Guide rails 23a, 25a, and 26a formed of vertically extending hollow pipes are joined to both side edges of one side surface (side surface facing the excavator 30) of a hollow columnar main body having a rectangular cross section. 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.

The excavator 30 includes guide rails 23a, 2a.
The first and second support guides 31a and 31b movably attached to the 5a and 26a are vertically movably supported along the leader frame 20.

A power swivel 33 is pivotally supported and attached by a pin 33a to the first support guide 31a, and a support member 32 connected to the power swivel 33 so as to be horizontally rotatable relative to the power swivel 33 is attached. The movable sheave 32a is rotatably attached to the support member 32.

The power swivel 33 is an excavation drive means and is composed of a hydraulic motor and a speed reducer, and a hydraulic hose and a tube 5 for supplying a driving hydraulic pressure to the hydraulic motor.
7a, 57b, 57c are power swivel 3 as shown.
It is connected to 3. The hydraulic pressure is supplied from a hydraulic power unit (not shown) arranged on 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
It is connected to the lubricator 52 via the air hose and the tubes 54a, 54b, 54c, and is further connected from the lubricator 52 to the air compressor 50 via the air hose 51. Therefore, the compressed air supplied from the air compressor 50 is sent to the lubricator 52 and mixed with the lubricating oil in a mist state, and then supplied to the air swivel 35.

The lubricator 52 is provided with an on / off valve for controlling the on / off control of the compressed air supply, and an air supply control device 53 for remotely controlling the operation of the on / off valve. It is arranged on the lubricator 52.

As shown in detail in FIG. 2, the air swivel 3
A discharge port 36 for discharging slime (a mixture of earth and sand and oil) generated by excavation to the outside is provided at the lower part of 5, and a pipe P is attached to the lower end 35a by being screwed by a taper screw or the like. The pipe P is rotatably supported by a pipe guide member 39, which will be described in detail later, at an intermediate portion. The drive shaft 33a of the power swivel 33 is connected to the connecting tube 34 and the air swivel 3
A drive rod 38 is connected to the drive shaft 33a by a taper screw.

This drive rod 38 is used for the air swivel 35.
An air hammer excavation device (excavation means) B is attached to the lower end of the drive rod 38 as shown in FIG.
The drive 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, as described above, the drive shaft 33 of the power swivel 33 is
a is connected to the drive rod 38, and the power swivel 33 rotationally drives the entire air hammer excavating device B via the drive rod 38.

As shown in FIG. 3, the air hammer excavating device B includes an air hammer mechanism 40, a hammer rod 41 which is vertically moved by the air hammer mechanism 40, and an excavating bit 42 which is connected to a lower end of the hammer rod 41. Composed. 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 42 are provided on the lower surface of the drill bit 42.
a is provided, and the projection 42a continuously collides with the ground due to the vertical movement of the excavation bit 42, and gives impact vibration to crush the ground. At this time, at the same time, the power swivel 33 simultaneously rotates the entire air hammer device B gently, the position where the projection 42a collides changes according to this rotation, and the ground is gradually excavated into a cylindrical shape.

The air supplied to the air hammer mechanism 40 to move the excavation bit 42 up and down is blown to the lower surface of the excavation bit 42, and the concave portion 42b on the side surface of the excavation bit 42.
Flows upward through a space surrounded by the outer peripheral surfaces of the air hammer mechanism 40 and the drive rod 38 and the inner peripheral surface of the pipe P, and then flows out from the discharge port 36 to the outside. At this time, the lubricating oil mixed in the compressed air lubricates the collision portion between the projection 42a and the ground, and also mixes in the excavated earth and sand to form a slime and prevent the crushed earth and sand from scattering as dust. To do. The slime is discharged from the discharge port 36 together with the compressed air.

The excavating bit 42 is configured to be expandable and contractible (foldable) in the radial direction. 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. Drill a hole slightly larger than the outer diameter of P. When the excavation is completed, when the excavation bit 42 is rotated in the reverse direction by the power swivel 33, the excavation bit 42 is folded and contracted in the radial direction, and the outer diameter of the pipe P
Smaller than the inner diameter of.

Therefore, after removing the screw connection between the pipe P and the air swivel 35, the entire excavation device 30 can be pulled up to remove the excavation device 30 while leaving only the pipe P in the ground. As a result, the well can be excavated with the pipe P buried vertically.

When the well is excavated as described above, the pipe P is buried vertically (so that it can be maintained in a state parallel to the first to third frames 23, 25, 26). Further, a pipe guide device is attached to the lower end of the third frame 26. As shown in FIG. 4, this pipe guide device is composed of a ground plate 29 arranged at the lower end of the third frame 26 and a guide member 39 detachably attached to the ground plate 29. There is.

At the rear portion of the upper surface of the main body portion 29a of the ground plate 29, two holding plates 29b are arranged upright, and the third frame 26 can be positioned between both holding plates 29b, which is not shown. The ground plate 29 can be attached to the lower end portion of the third frame 26 by an attachment member such as a bolt or a pin.

A notch 29e having a predetermined width is formed in the front portion of the upper surface of the main body portion 29a. The notch 29e is formed to have a width and a depth that allow the thickest pipe P to pass through, among various pipes P whose details will be described later. And the main body 29a
Two guide mounting shafts 29c are provided upright on the left and right sides of the notch 29e on the upper surface of the. In addition,
The bottom surface of the main body 29a has a leader frame 2 when excavating.
A plurality of mountain-shaped protrusions 29d are formed so that 0 does not shift.

A pipe guide member 39 can be inserted into and removed from the guide mounting shaft 29c from above, and the pipe guide member 39 can be freely attached to and detached from the ground plate 29.
The pipe guide member 39 includes a first guide member 139 and a second guide member 239, and each main body portion 139a,
The 239a is formed in a semi-cylindrical shape by vertically dividing the cylinder into two parts (front and rear).

On the left and right sides of the main body portion 139a of the first guide member, there are formed brim portions 139d extending in the outward direction.
The cylindrical first holding pipe 139b is fixed. Further, a brim portion 239d is also formed on the left and right of the main body portion 239a of the second guide member, and a cylindrical second holding pipe 239b is fixed to an intermediate portion of the outer end portion of the brim portion 239d in the vertical direction. There is.

Then, each of these main body portions 139a, 239
In the state where a is combined so as to be an integral cylinder,
As shown in FIG. 2, the second holding pipe 239b is arranged between the first holding pipes 139b,
First holding pipe 139b and second holding pipe 239b
Also becomes an integral cylinder. Here, each holding pipe 139b,
The inner diameters of the through holes 139c and 239c formed in the 239b are formed so that the guide mounting shaft 29c can be inserted therein.

When the guide members 139 and 239 are engaged with each other, the inner diameter of the cylindrical portion formed by the main body portions 139a and 239a is such that the pipe P is rotatable and
It is movable up and down, and has a size that does not rattle in the front, rear, left, and right directions.

In the pipe guide device thus constructed, the pipe guide member 39 can be attached to the ground plate 29 by engaging both guide members 139 and 239 and inserting them into the guide attachment shaft 29c. Further, since the pipe guide member 39 is divided into two parts, not only before the pipe P is attached to the air swivel 35, but also on the outer periphery of the pipe P easily after the pipe P is attached to the air swivel 35. The guide member 39 can be positioned.

The pipe P passing through the pipe guide member 39 is buried in the ground by passing between the notches 29e in the ground plate 29 as shown in FIG. 5 (A). Here, in the well drilling vehicle according to the present embodiment, the nominal diameter is 1
Five types of pipes of 0, 8, 6, 5 and 4 inches are used, and the thickest pipe P of 10 inches is used in (A).

When guiding a pipe thinner than the pipe P (for example, 6 inches), if the pipe guide member 39 for the 10-inch pipe P is used as it is, play occurs in the pipe guide member 39. A pipe guide member 39 'as shown in FIG. 5 (B) is used.

The pipe guide member 39 'is constructed in the same manner as the pipe guide member 39, but the main body portion 339.
a, 439a has an inner diameter of 6 inches when engaged with a pipe P '
Is formed to match the outer diameter of the. Then, the brim portions 339d extending to the left and right of the main body portions 339a, 439a,
439d is formed to be longer than the brim portions 139d and 239d, and the distance L between the left and right holding pipes 339b and the like (only the holding pipe 339b located at the top is shown in the figure) is a pipe guide. It is formed to be the same as the distance L in the member 39.

As a result, when burying a 6-inch pipe P ', a thick pipe P from the guide mounting shaft 29c is used.
It suffices to pull out the pipe guide member 39 for use and insert the pipe guide member 39 'into the guide mounting shaft 29c. As a result, the pipes can be reliably guided without changing the center positions of the pipes P and P'during excavation.
Therefore, when there are five types of pipes to be used, it is sufficient to prepare only five types of pipe guide members.

Further, in the pipe guide device constructed as described above, the grounding area of the grounding plate 29 can be widened, and since it extends to both sides of the excavating device 30, the leader frame 20 can be mounted during excavation. Can be firmly supported.

Although the pipe guide member 39 is divided into two parts in the left-right direction in the above embodiment, the present invention is not limited to this, and may be integrally formed into a cylindrical shape. . Furthermore, when the structure is dividable, it is not always necessary to divide it into two parts, and it may be divided into three or more parts. Also,
The mechanism for attaching / detaching this pipe guide member 39 to / from the ground plate 29 does not have to be configured to be insertable / removable with respect to the guide attachment shaft 29c as in the above-described embodiment, but can be attached / detached by bolts or the like. Of course, other mechanisms are also acceptable.

[0046]

As described above, according to the present invention,
A ground plate is provided at the lower end of a leader frame that guides the embedded pipe up and down, and a pipe guide member that guides the pipe embedded in the ground plate is detachably arranged. When changing the thickness of the pipe, only the pipe guide member portion needs to be replaced, so that the weight of the replacement part can be reduced, and the replacement work can be performed easily and the replacement part can be easily replaced. Can be manufactured at low cost.

Further, when the pipe guide member is divided, the pipe guide member can be attached even when the pipe is already grounded on the ground, and one replacement part can be installed. Since the weight is further reduced, the replacement work can be performed more easily.

[Brief description of drawings]

FIG. 1 is a front view showing a drilling work vehicle including a pipe guide device for a hanging drilling machine 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.

FIG. 4 is a perspective view showing the pipe guide device.

FIG. 5 shows an upper surface in a state where a thick pipe is guided in the pipe guide device, and an upper surface in a state where a thin pipe is guided in FIG.

FIG. 6 shows a top surface of a conventional pipe guide device in (A) and a front surface thereof in (B).

[Explanation of symbols]

 2 Swivel base 3 Telescopic boom 20 Leader frame 29 Ground plate 30 Excavator 33 Power swivel 35 Air swivel 39 Pipe guide member 40 Air hammer mechanism 42 Excavation bit 50 Compressor 52 Lubricator P pipe

Claims (2)

[Claims] 1. An excavation drive means that is suspended from an upper portion of a support means and is vertically moved up and down, a drive rod that is attached to the excavation drive means and extends downward, and an excavation means that is attached to a lower end of the drive rod. And a leader frame hanging from the upper part of the support means and guiding the up-and-down movement of the excavation drive means, in a hanging drilling machine, the drive rod is inserted into and removed from the excavation drive means. A buried pipe, a ground plate disposed at the lower end of the leader frame, and a pipe guide member configured to be attachable to and detachable from the ground plate and positioned at the outer periphery of the buried pipe to vertically hold the buried pipe. And a pipe guide device for a hanging drilling machine. 2. The pipe guide device for a hanging drilling machine according to claim 1, wherein the pipe guide member is configured to be vertically separable into at least two parts.