JP2703067B2 - Drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to an excavated earth and sand discharging device for discharging earth and sand excavated by an excavator to a ground surface in a vertical excavation work of a construction work.

<Conventional technology> Excavation is an indispensable operation in construction work. LNG
(Liquefied natural gas) In underground construction work for storage of underground tanks and the like, holes with a diameter and depth of several tens of meters must be dug. In this case, conventionally, heavy equipment such as a drag line or a clamshell is arranged on the ground surface to excavate an excavation point.

FIG. 11 and FIG. 12 are schematic diagrams showing excavation work by a conventional excavating machine.

As shown in FIG. 11, the drag line is configured such that a boom 3 is attached to an upper revolving structure 2 supported by a lower traveling structure 1, and a bucket 5 is attached to a tip end of the boom 3 via a rope 4. ing. Thus, the bucket 5 is released by the centrifugal force generated by the turning motion, and the bucket 5 is pulled along the excavated surface by the rope 4 to scoop up the earth and sand. Then, the scooped earth and sand is discharged to the outside.

As shown in FIG. 12, the clamshell has a boom 3 attached to an upper revolving unit 2 supported by a lower traveling unit 1 in the same manner as the drag line described above. The bucket 6 is configured to be hung from the center. Then, the bucket 6 is dropped on the excavation surface to seize the earth and sand. Then, the sediment caught is discharged to the outside.

<Problems to be Solved by the Invention> In the above-described excavation work using the drag line and the clamshell, excavation and transportation and discharge of excavated earth and sand are performed by one heavy machine. Therefore, when performing an operation with a large excavation area and a high excavation depth, it is necessary to move this heavy equipment within a considerable range, and the operation time is long, and the excavation operation efficiency is poor. there were.

In addition, when excavating the excavation point within a predetermined excavation range or excavation depth, various heavy machines disposed on the ground surface perform excavation using buckets, so that the wall surface of the excavated hole does not become vertical. Therefore, conventionally, after the excavation, the finishing work of the wall surface has to be performed using another machine, which is troublesome.

Furthermore, it is conceivable to use a bucket elevator as a device for transporting and discharging earth and sand upward, but when digging deep ground, the distance for transporting earth and sand to the ground increases with the digging of the ground. Accordingly, the bucket elevator is extended by extending the bucket elevator downward, and the sediment loading section must also be moved downward, which causes a problem that extra labor and work time are wasted. Was.

The present invention solves such a problem,
An object of the present invention is to provide an excavated earth and sand discharging device which improves the work efficiency.

<Means for Solving the Problems> The excavated earth and sand discharge device of the present invention for achieving the above object includes a first conveyor stretched over an excavation point,
A second conveyor having a horizontal portion disposed along the first conveyor and a vertical portion having an upper end continuous with the horizontal portion and a lower end extending to the ground surface of the excavation point and forming a sediment loading portion; A support mechanism that supports an end of the horizontal part and moves the horizontal part along the first conveyor so that the vertical part can move up and down; and a horizontal part and a vertical part in the second conveyor. And a moving mechanism for supporting the continuous portion and moving the vertical portion along the horizontal portion when the sediment loading portion moves along the ground surface of the excavation point.

<Operation> The excavated earth and sand is loaded on the earth and sand loading part of the second conveyor, and is transported upward through the vertical part. And it is conveyed to a 1st conveyor from a horizontal part, and is discharged | emitted to the ground surface.

When the sediment loading unit is moved along the ground surface at the excavation point in order to excavate a predetermined excavation area, the vertical mechanism moves along the horizontal part while maintaining a continuous state with the horizontal part by the moving mechanism. In this way, continuous earth and sand discharge work is performed.

Further, when the excavation depth has advanced, the horizontal part of the second conveyor is moved along the first conveyor by the support mechanism, and the vertical part formed continuously with this horizontal part is extended downward, The bottom of the earth and sand pile is lowered in accordance with the excavation depth.

<Embodiment> Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic view of an excavated earth and sand discharging apparatus according to one embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 4 is a perspective view of the conveyor, FIG. 4 is a front view of an end of a horizontal portion of the second conveyor showing a supporting mechanism, FIG. 5 is a cross-sectional view taken along line VV of FIG. 4, and FIG. 6 is VI-VI of FIG. 7 is a sectional view of FIG.
VII-VII sectional view, FIG. 8 is a front view of a continuous part of a horizontal part and a vertical part of the second conveyor showing a moving mechanism, FIG. 9 is a sectional view taken along the line IX-IX of FIG. 8, and FIG. It is a front view of the earth and sand loading part of two conveyors.

As shown in FIGS. 1 and 2, 11 is the ground surface, 12 is the ground surface of the excavation site to be excavated in a circular shape, and 13 is the geological condition of the excavation site in order to prevent spring water caused by digging down the ground. It is an underground continuous wall formed corresponding to.

The excavated earth and sand discharge device of the present embodiment includes a first conveyor 21 bridged above an excavation point, a horizontal portion 22 connected to the first conveyor 21, and a continuous sediment loading portion 23 at the lower end. Conveyor 25 having a vertical portion 24 formed with
And a support mechanism 26 for supporting both ends of the horizontal part 22 and a moving mechanism 27 for supporting a continuous part of the horizontal part and the vertical part.

A truss-shaped main girder 31 is stretched over the ground surface 12 at the excavation point drilled into the circular hole, and this main girder is
Both ends of 31 are supported by a support base 32 installed on the ground surface 11. Each support base 32 has a plurality of wheels at the bottom.
A 33 is mounted so that it can travel along the outer perimeter of the hole dug around the excavation point.

A support plate 34 is fixed to the lower surface of the main girder 31, and a guard frame 35 that supports the first conveyor 21 is fixed to one side of the support plate 34. This first conveyor
Reference numeral 21 denotes an endless transport belt 36 and pulleys 37 and 38 for supporting the transport belt 36, and can be driven by a drive source (not shown). A hopper 39 is provided on one ground surface 21 of the first conveyor 21.

A pair of guide rails 40 having an L-shaped cross section are attached to the support plate 34 in parallel with the transport direction of the first conveyor 21. The horizontal portion 22 of the second conveyor 25 is movably supported by the guide rail 40.

The second conveyor 25 is installed adjacent to and parallel to the first conveyor 21 and has an endless transport chain 41.
Is hung between a pair of support mechanisms 26 on the guide rail 40 and a sediment excavation and stacking device 42 installed on the ground surface 12 of the excavation point to form the horizontal portion 22 and the vertical portion 24. .

The second conveyor 25 is a chain conveyor, and as shown in FIG.
It comprises an endless chain 43 and a plurality of buckets 44 attached in tandem to the four chains 43. Therefore, the earth and sand can be continuously transported in one direction by driving the transport chain 41 in the longitudinal direction.

The transport chain 41 is supported by the support mechanism 26 at both ends of the horizontal portion 22. Since the left and right support mechanisms 26 have substantially the same configuration, only one of them will be described below.

On the guide rail 40, a towing truck 51 constituting the support mechanism 26 is provided.
The tension cart 52 and the support cart 53 are movably supported.

As shown in FIG. 5, the towing truck 51 is located at an upper portion of a main body 54 formed in a box shape, and a pair of front and rear carrier rollers 55 are rotatably supported on left and right sides by a support shaft 56, respectively. The carrier roller 55 can freely roll on the left and right rail portions 57 of the guide rail 40. In addition, a support shaft 59 to which a tow rope 58 described later is connected is pivotally supported at a lower portion of the main body 54.

As shown in FIG. 6, the tension cart 52 is located at an upper portion of a box-shaped main body 61, and a pair of front and rear carrier rollers 62 are rotatably supported on the left and right sides by a support shaft 63, respectively. The carrier roller 62 can freely roll on the left and right rail portions 57 of the guide rail 40. A pair of left and right drive shafts 64 is rotatably supported at the lower portion of the main body 61. One end (inside) of the drive shaft 64 is provided with a drive roller.
A drive device 66 having a motor is mounted on the other end (outside). The transport chain 41 located on the horizontal portion 22 of the second conveyor 24 is engaged with the drive roller 65, and the drive device 66 is driven to drive the drive roller 65.
Rotates, and the transport chain 41 can be driven.

As shown in FIG. 7, the support cart 53 is located above a box-shaped main body 67, and a pair of front and rear carrier rollers 68 are rotatably supported on the left and right sides by a support shaft 69, respectively. The carrier roller 68 can freely roll on the left and right rail portions 57 of the guide rail 40. In addition, a pair of upper and lower support rollers
0, 71 are rotatably supported by rotating shafts 72, 73. The support rollers 70 and 71 support the lower surface of the transport chain 41 to prevent the transport chain 41 from sagging due to its own weight.

Each of the traction cart 51, the tension cart 52, and the support cart 53 includes a carrier roller 55, 62, 68 formed by a rail portion 57 of the guide rail 40.
Is supported by being suspended by the guide rail 40. Also, winches 74 are attached to both ends of the guard frame 34. The winch 74 has a driving device (not shown), and the base end of the tow rope 58 is connected and wound. The tip of the tow rope 58 is connected to the tow truck 51. Also, this towing truck 51
And the tension cart 52 are connected by a connection rope 75.

By operating the winch 74, the tow rope 58
, The towing truck 51 can be moved along the guide rail 40, and further, the tensioning truck 52 can be moved via the connecting rope 75, whereby the horizontal portion of the second conveyor 25 can be moved.
22 can be moved along the first conveyor 21.

A continuous portion of the horizontal portion 22 and the vertical portion 24 of the second conveyor 25 is supported by a moving mechanism 27. As shown in FIGS. 8 and 9, the movable carriage 81 is located above a box-shaped main body 82, and a pair of front and rear carrier rollers 83 are rotatably supported on the left and right sides by a support shaft 84. And
The carrier roller 83 is rotatable on the left and right rail portions 57 of the guide rail 40, so that the movable carriage 81 is suspended from the guide rail 40 and supported. Thus,
The vertical part 24 of the second conveyor 25 can be moved along the horizontal part 22 by the movable cart 81.

That is, a pair of front and rear first support rollers is provided at the center of the main body 82.
A first reversing roller 87 is provided adjacent to the first support rollers 85 and 86, a second reversing roller 88 is provided below the first reversing roller 87, and a second reversing roller 88 is provided. Second support rollers 89 are pivotally supported diagonally above the rollers 88, respectively.
A third support roller 90 is pivotally supported on the opposite side of the first reversing rollers 85 and 86. Further, above the rollers, the lower surface of the transport chain 41 moving there is supported. A fourth support roller 91 for preventing the transport chain 41 from sagging due to its own weight is pivotally supported.

Further, a chute 92 is attached to the main body 82 of the movable cart 81 at a position below the transport chain 41 inverted by the first reversing roller 87. The shooter 92 is for sliding earth and sand discharged from the bucket 44 of the transport chain 41 onto the transport belt 36 of the adjacent first conveyor 21.

When the bucket 44 moves upward in a horizontal state in which the excavated earth and sand are loaded in the bucket 44 of the transport chain 41, the chains 43 in front of and behind the separated bucket 44 are moved to the first position.
The buckets 44 are held together by the support rollers 85 and 86, and the horizontal state is maintained. Then, the bucket 44 is inverted by the first reversing roller 87, and the sediment loaded at this time is dropped downward, and is slid down onto the transport belt 36 of the first conveyor 21 via the shooter 92. Thereafter, the empty bucket 44 is reversed by the second reversing roller 88, and returned to a horizontal state by the second support roller 89 to be conveyed.

In addition, a guard frame 35 located near a continuous portion between the horizontal portion 22 and the vertical portion 24 has transport belts above and below the first conveyor 21.
Support rollers 93 and 94 for preventing slack due to the weight of 36 are attached.

A sediment loading section 23 is formed below the vertical section 24 of the second conveyor 25. That is, as shown in FIG.
The transport chain 41 located at the bottom of the guide rollers 101, 102,
It is bent and guided in an L shape by 103, and its end is supported by a support roller 104. The rollers 101, 102, 103, and 104 are rotatably supported by a support member 105 extending from the main body of the earth and sand digging and loading device.
As a result, the sediment loading section 23 below the second transport belt 25
Is supported by the earth and sand digging and loading device 42.

Thus, the bucket 44 that has been emptied and conveyed is inverted by the rollers 103 and 104 to be in a horizontal state in which earth and sand can be loaded. Note that a hopper 106 is provided above the sediment loading unit 23.

As shown in FIG. 1 and FIG.
In this embodiment, a bucket wheel excavator (hereinafter, referred to as BWE) is used. In BWE, a turning frame 112 is mounted on an upper portion of a crawler type traveling device 111, and a base end of a boom 114 on which a wheel 113 is rotatably supported is mounted on a tip of the turning frame 112. An excavating bucket 115 is fixed to an outer peripheral portion of the wheel 113, and the ground surface 12 can be excavated by rotating the wheel 113. A belt conveyor (not shown) is mounted on the BWE.

Thus, the earth and sand excavated by the bucket 115 of the wheel 113 is supplied to the hopper 106 by the belt conveyor, and the bucket of the transport chain 41 located in the earth and sand loading portion 23.
Loaded in 44.

Next, the operation of the excavated earth and sand discharging device described above will be described.

As shown in FIG. 1, a BWE
The earth and sand excavated on the ground surface 12 at the excavation point is supplied to the hopper 106 of BWE. As shown in FIG.
The amount of the earth and sand supplied to the inside is supplied to the bucket 44 of the transport chain 41 of the second conveyor 25. Fig. 1 and Fig.
The second conveyor 25 driven in the direction of the arrow in FIG. 10 continuously transports the earth and sand from the vertical portion 24 to the horizontal portion 22.

At this time, as shown in FIG. 8, the bucket 44 loaded with the earth and sand is transported upward, and is inverted by the first inversion roller 87 of the movable cart 81, so that the earth and sand falls.
The dropped earth and sand is discharged by the shooter 92 onto the conveyor belt 36 of the first conveyor 21. The first conveyor 21 is always driven in the direction of the arrow in FIG. 1, and the discharged earth and sand is loaded on the hopper 39 by the first conveyor 21.

In order to excavate a predetermined excavation area, the BWE 42 must move along the ground surface 12 at the excavation site. In FIG. 1, when the BWE 42 moves in the left-right direction, the second conveyor 2
The earth and sand loading section 23 below 5 moves in the same manner. Accordingly, the vertical portion 24 moves, and a continuous portion of the upper portion of the vertical portion 24 with the horizontal portion is supported by the moving carriage 81 of the moving mechanism 26. By moving them, the continuous state of both is maintained. Therefore, a predetermined excavation range can be excavated by moving the BWE 42 along the longitudinal direction of the main girder 31 and moving the main girder 31 along the outer periphery of the excavation point by the support stand 32.

In addition, as the excavation depth advances, the distance from the ground surface 11 to the ground surface 12 at the excavation point increases, and the distance over which the earth and sand are transported must be increased. As shown in FIGS. 1 and 4, by operating one or both winches 74, the tension cart 52 supporting both ends of the horizontal portion 22 of the second conveyor 25 is moved via the traction cart 51. And approach each other. As a result, the horizontal portion 22 of the second conveyor 25 moves along the first conveyor 21, and its overall length is reduced. Accordingly, the vertical portion 24 moves downward to extend its entire length. Therefore, it is possible to excavate to a predetermined excavation depth by the BWE.

<Effect of the Invention> As described above in detail with the embodiments, according to the excavated earth and sand discharging device of the present invention, the first conveyor conveyed over the excavation point and the first conveyer are disposed along the first conveyor. A second conveyor having a vertical portion having a horizontal portion and an upper end continuous with the horizontal portion and a lower end extending to the ground surface of the excavation point and having a sediment loading portion formed thereon, and a support mechanism for supporting an end portion of the horizontal portion And the second
Since it has a moving mechanism that supports a continuous part of the horizontal part and the vertical part in the conveyor, even if the sediment loading part moves along the ground surface of the excavation point to excavate a predetermined excavation area, the vertical part By moving along the horizontal part, the continuity of the two is maintained, and by moving the horizontal part along the first conveyor even if the transport distance of the earth and sand is extended to excavate the predetermined excavation depth The vertical part can be extended.

Therefore, by moving and extending the vertical part according to the excavation range and excavation depth, the earth and sand excavation loading and discharging work is automatically performed,
In addition, the operation can be performed continuously, the labor of the operator is reduced, and the operation time is also reduced, so that the operation efficiency of the excavated earth and sand discharge operation can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of an excavated earth and sand discharging apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG.
FIG. 4 is a perspective view of the conveyor, FIG. 4 is a front view of an end of a horizontal portion of the second conveyor showing a supporting mechanism, FIG. 5 is a cross-sectional view taken along line VV of FIG. 4, and FIG. 6 is VI-VI of FIG. 7 is a sectional view of FIG.
VII-VII sectional view, FIG. 8 is a front view of a continuous part of a horizontal part and a vertical part of the second conveyor showing a moving mechanism, FIG. 9 is a view of FIG.
IX-IX sectional view, FIG. 10 is a front view of the earth and sand loading portion of the second conveyor, and FIGS. 11 and 12 are schematic diagrams showing excavation work by a conventional excavating machine. In the drawing, 11 is the ground surface, 12 is the ground surface of the excavation point, 21 is the first conveyor, 22 is the horizontal part, 23 is the sediment loading part, 24 is the vertical part, 25 is the second conveyor, 25 is the support mechanism, 27 Is a moving mechanism.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-107624 (JP, A) JP-A-61-122335 (JP, A) JP-A-59-185236 (JP, A)

Claims (1)

(57) [Claims] 1. A first conveyor extended over an excavation point, a horizontal part and an upper end arranged along the first conveyor are continuous with the horizontal part, and a lower end extends to the ground surface of the excavation point. A second conveyor having a vertical portion provided with a sediment loading portion formed thereon, and supporting the end of the horizontal portion and moving the horizontal portion along the first conveyor to move the vertical portion in the vertical direction. And a support mechanism that can move freely, and supports a continuous portion of the horizontal portion and the vertical portion of the second conveyor, and moves the vertical portion along the horizontal portion when the sediment loading portion moves along the ground surface of the excavation point. And a moving mechanism for moving the excavated earth and sand.