JP2527988Y2 - Excavator mud removal equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muddy water removing apparatus capable of forcibly removing muddy water adhering to the surroundings when the excavator body is pulled up from a drilling groove.

[0002]

2. Description of the Related Art When excavating a trench for a continuous underground wall, excavation is performed using a Kelly excavator, a hydrophrase excavator or the like while supplying muddy water in order to prevent collapse of the excavated wall surface. For this reason, when raising the excavator, the excavator is lifted with muddy water adhered to the surface of the excavator body or the like, and the following problem has occurred.

[0003]

[Problem to be solved by the invention] First, when the raised excavator body is shaken at a high position on the ground surface, muddy water adhering to the surface of the excavator scatters around and causes a considerably wide area around the work site to be contaminated. Become.

Conventionally, as a countermeasure against this type of dirt around the surroundings, a curing enclosure or the like has been arranged around the excavator to prevent scattering.
It was not perfect, such as being torn by the excavator itself, and the work efficiency was also reduced.

On the other hand, muddy water remaining on the surface without scattering is also
If left as it is, it dries and adheres to the surface of the excavator body or these winding devices, so that a subsequent cleaning process is also required. To remove the adhering muddy water early, it is sufficient to wash it while pulling it up.However, if cleaning work is performed right above the digging groove, the washing water will flow inside the digging groove, causing adverse effects on muddy water concentration etc. The washing water itself also scatters around the dirt.

[0006] This invention solves the above-mentioned problem, and enables muddy water adhering to the excavator body or the like directly above the excavation trench to be blown off toward the inside of the excavation trench while the excavator is being lifted up, so that it can be removed. It is an object of the present invention to provide a muddy water removing device for an excavator.

[0007]

In order to achieve the above object, the present invention provides a frame-shaped insertion guide which is installed at the top end of an excavation groove and surrounds the periphery of an excavator body. And a plurality of air outlets which are located inside the air supply pipe and open obliquely downward, and a compressor connected to the air supply pipe. is there.

[0008]

When pressurized air is supplied to the air supply pipe when the excavator is lifted, pressurized air is blown onto the surface of the excavator body or the like through a plurality of air jets, and the attached muddy water is blown off into the excavation groove.

[0009]

FIG. 1 shows a case where the present invention is applied to a wire suspension type kelly excavator. In the figure, a main body of an excavator, that is, a kelly scrub 4 is suspended from a crane boom 2 provided on a base machine 1 via a wire 3. The kelly rub 4 has a pair of shells 4a driven by a hydraulic cylinder (not shown) at its tip, and a hydraulic hose 5 having one end connected to the hydraulic cylinder is led out from the upper part of the kelley rub 4, and is provided on a ground surface portion. 6 is connected to a hydraulic drive unit 7.

On the other hand, at the top of the excavation groove 8, there is provided an insertion guide 1 which is also used as a muddy water removing device which surrounds the outer periphery of the kelly rub 4
0 is installed and connected to a compressor 12 for supplying high-pressure air via a high-pressure hose 11.

As shown in FIGS. 2 to 4, the insertion guide 10 is formed by forming a steel section having a U-shaped cross section vertically and horizontally in a shape surrounding the outer periphery of the Kelly club 4 and integrally connecting the sections by welding. A pair of vertical frames 1 arranged orthogonal to the groove 8
0a, a pair of horizontal frames 10b arranged in parallel, and a reinforcing frame 1 connecting extension portions 10a 'of both vertical frames 10a.
0c, and the air supply pipe 14 is provided along the inside of the U-shape of the vertical frame 10a and the horizontal frame 10b.

The air supply pipe 14 is joined in a flowing state via a cheese 14a and an elbow 14b along the frame shape of the insertion guide 10, and the air supply pipe 14 is inserted through the pipe holding metal fitting 15 welded inside the insertion guide 10. The air supply pipe 14 is supported inside the guide 10.
The air supply ends 14c opening on both sides of the
The protruding end protrudes from the tip of a 'and is connected to the high-pressure hose 11 via a hose nipple or the like.

In the inside of the air supply pipe 14, air outlets are provided at two locations opposing each other along the width direction of the cerry club 4 and at one location opposing each side along the thickness direction. 16 is open. Each ejection port 16 has a slit shape and is directed obliquely downward with respect to the Kelly Club 4.

In the above configuration, the kelly rub 4 descends through the inside of the insertion guide 10 and excavates the inside while filling with muddy water. In addition, every time the excavation is completed, the work of being pulled up from the inside of the excavation groove 8 to the surface of the ground through the insertion guide 10 by winding up the wire 3 is repeated.

When the compressor 12 is driven for each lifting operation, pressurized air is introduced into the air supply pipe 14, and is simultaneously blown obliquely downward through the air outlets 16 as shown by arrows in the figure. The muddy water that is sequentially sprayed on the four peripheral surfaces of the Kelly Club 4 and the like is blown obliquely downward, that is, toward the excavation groove 8 side.
Therefore, when the kelly rub 4 and the like are lifted on the insertion guide 10, muddy water adhering to these surfaces is almost removed, and the blown out muddy water is returned to the inside of the excavation groove 8.

Although the present invention has been described in connection with the embodiment in which the present invention is applied to muddy water removal of a Kelly excavator, it is needless to say that the present invention can be applied to a hydrophrase excavator and other excavators generally ascending and descending in an excavation groove through an insertion guide. .

[0017]

[Effect of the Invention] As explained in detail in the above embodiment, the muddy water removing device for an excavator according to the present invention has
Since the muddy water adhering to the surface of the excavator body or the like is blown off and removed each time the excavator is lifted up, there is no scattering around the muddy water, and a good working environment can be maintained. This also eliminates the need for a curing enclosure and improves work efficiency. In addition, since muddy water can be removed during lifting,
There is an advantage that the subsequent cleaning process is not troublesome.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration when the present invention is applied to a Kelly excavator.

FIG. 2 is a plan view of an insertion guide that also serves as a muddy water removing device according to the present invention.

FIG. 3 is a perspective view of the air supply pipe.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 4 Kelly Club (Excavator Body) 8 Drilling Groove 10 Insertion Guide 12 Compressor 14 Air Supply Pipe 16 Air Spout

Claims (1)

(57) [Scope of request for utility model registration] 1. A frame-shaped insertion guide that is installed at the top end of an excavation groove and surrounds the periphery of an excavator body, an air supply pipe that is piped along the inside of the insertion guide, and an inside of the air supply pipe. A muddy water removing device for an excavator, comprising: a plurality of air outlets opened obliquely downward in a portion; and a compressor connected to the air supply pipe.