JPH061664Y2 - Muddy water discharge device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muddy water discharge device capable of discharging muddy water from an excavation hole in a short time when constructing an underground continuous concrete wall or the like.

[0002]

2. Description of the Related Art As a conventional mud discharge device of this type,
For example, there is one described in JP-A-48-74006. This device is shown in simplified form in FIG.

In the figure, G is a support column which supports the rotary cutter type excavator 1 at its lower end and vertically descends the rotary cutter type excavator 1 to reach the bottom of the excavation groove X. It is attached to a suitable mechanical device, not shown. S is a trolley on which a hose reel device D having a hose reel 2 is mounted, and a hose W for muddy water discharge is wound around the hose reel 2.

In the muddy water discharge device having such a structure, the hose W is wound in the order of a coil on the hose reel 2 as the hose reel 2 rotates, or
It is unwound one by one from the one wound in a coil.

[0005]

However, in the muddy water discharge device as described above, since the hose W is wound around the hose reel 2 many times, the length of the bent portion of the hose W is reduced. This is long and therefore there is a problem that the pumping resistance is large.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a muddy water discharge device having a small pumping resistance in a muddy water discharge hose. Furthermore, it is an object of the present invention to eliminate the bending and meandering due to the slack of the hose that occurs immediately after the addition of the muddy water discharge pipe for that purpose.

[0007]

In order to achieve the above object, the present invention relates to a muddy water discharge device for discharging muddy water in an excavation hole excavated by an excavator suspended up and down to the outside of the excavation hole. A pump attached to the excavator, a weight block arranged in the excavator, and a drain block for discharging muddy water from the pump to the outside of the excavation hole, extending downward by curving A flexible hose is provided, and the weight block absorbs the slack of the hose that occurs when the excavator moves up and down.

[0008]

When the excavator excavates the excavation hole, the excavator descends according to its depth. Therefore, the pump also descends and the hose also descends. At this time, there is a limit to the movement of the upper support portion of the hose, and it is necessary to add a muddy water discharge pipe such as a hose as needed. Immediately after the joint is added, the hose becomes excessive, and there is a risk of sagging or kinking. However, the weight of the weight block causes tension and eliminates bending and meandering due to sagging. Further, the number of hose additions can be further reduced, and the pumping resistance is further reduced.

[0009]

【Example】

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front sectional view showing the overall construction of a muddy water discharge device according to the present invention.

In the figure, 11 is an excavation hole formed in the ground, 12 is an excavator for excavating the excavation hole 11, and 13 is a base machine for suspending the excavation device 12 so that it can be raised and lowered. A pulley 15 is attached to the end of the arm 14 of the base machine 13.
Is attached. A reel suspension wire 16 is stretched around the pulley 15, and a reel 17 is rotatably supported at the lower end of the reel suspension wire 16. Also, 18
Is a suspension wire of the excavator 12.

On the reel 17, a base end of a flexible hose 19 made of, for example, a synthetic resin is wound about a half turn, and the end of the hose 19 is shown in FIG. As shown
It is connected to a fixed pipe 20 built in the excavator 12.

2 and 3 show the excavator 12 in more detail, in which a pair of rotary blades 21, 21 is arranged at the lower end of the excavator 12 and the excavator 12 is also lifted. A suction pipe 22a of the mud pump 22 is provided so as to project.

The discharge port of the sludge pump 22 is the fixed pipe 20.
Is connected to one end of the excavator 12, and the other end of the fixed pipe 20 is curved in an inverted U shape inside the upper end of the excavator 12.

The flexible hose 19 has one end 1
9a is connected to the fixed pipe 20, extends downward and bends, and extends upward, and the weight block 23 is hung at the bend. That is, as shown in FIG. 4, the weight block 23 is formed by connecting the rollers 24 in a semicircular shape, and the weight of the weight block 23 transmitted through the rollers 24 directs the curved portion of the hose 19 downward. Pushing it down. In other words, the weight block 23 moves up and down according to the amount of slack of the hose 19.

Therefore, the excavation depth becomes deep and the excavator 12
If the position of the reel 17 remains unchanged, the weight block 23 moves up. By the way, when it is excavated further deeply, the reel 17 is moved to the base machine 1.
However, if the limit is exceeded, another hose or pipe not shown is added to the hose, that is, the mud discharge pipe.

The pulley is fixed to the upper part of the excavator 12,
A plurality of hoses 19 may be wound around the weight block 23.

If the width of the rotary blade 21 is sufficiently larger than the width of the excavator 12, a hose, a weight block or the like can be mounted on the outer surface of the excavator 12. In this way, the hose can be attached very easily.

[0019]

As described in detail above, in the muddy water discharge device of the present invention, the hose is prevented from bending due to the slack of the hose that occurs immediately after the addition of the muddy water discharge pipe,
Therefore, the pumping resistance can be reduced.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing the overall configuration of an embodiment of the present invention.

2 is a front view showing the excavator of FIG. 1. FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a front sectional view showing an enlarged weight block.

FIG. 5 is a front cross-sectional view showing a conventional muddy water discharge device.

[Explanation of symbols]

 11 Drilling Hole 12 Excavator 13 Base Machine (Suspension Machine) 17 Reel 19 Hoses 22 Lifting Mud Pump 23 Weight Block

Claims (1)

[Scope of utility model registration request] 1. A muddy water discharge device for discharging muddy water in an excavation hole excavated by an excavator suspended up and down to the outside of the excavation hole, a pump attached to the excavator, and the excavator. Weight blocks placed in
A flexible hose that hangs downward, bends, and extends upward for discharging muddy water from the pump to the outside of the excavation hole, the weight block is used for raising and lowering the excavator. A mud discharge device which absorbs the slack of the hose which is generated accordingly.