JPH083318B2 - Muddy water press type excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mud pressure excavating device for excavating a tunnel having a relatively small diameter when a pipe or the like is buried in the ground, and in particular, can suitably prevent clogging of a mud discharge pipe. The present invention relates to a mud pressure type excavation device.

[0002]

2. Description of the Related Art A conventional excavation device of this type is shown in FIG.
It is known that a cutter head 2 is rotatably provided at the tip of a front conduit 1 and a plurality of bits 3 for excavating soil are attached to the cutter head 2 as shown in FIG. The cutter head 2 is concentrically fixed to the tip of a rotary shaft 5 which is rotatably supported via a bearing 4 on the inner circumference of the leading conduit 1, and the rotary shaft 5 is rotationally driven by a drive source (not shown).

A water supply pipe 6 and a sludge discharge pipe 7 are axially fixed to the inner circumference of the front conduit 1, and the water supply pipe 6 and the sludge discharge pipe 7 are respectively attached to the backs of the cutter heads 2 in the front conduit 1. It opens into the formed chamber 8. Also, the cutter head 2
Stirring blades 9 are provided so as to protrude on the back surface of each of them.

In the conventional excavating device constructed as described above, the cutter head 2 is rotated by the rotation of the rotary shaft 5, and the tip 3 is sequentially pressed by a jack (not shown) while the bit 3 excavates the ground. The excavated earth and sand enter the chamber 8 and the water pipe 6 is pumped by a pump (not shown).
Slurry-like sludge 10 is formed by the water sent through the. The sludge 10 is discharged from the sludge pipe 7 by a sludge pump not shown.
It is discharged to the outside via. At this time, the sludge 10 in the chamber 8 is agitated by the agitating blades 9 to prevent clogging of the sludge discharge port 7 of the sludge pipe 7 for cleaning.

As a conventional technique of this type, as described in Japanese Utility Model Publication No. 63-38319, a blade portion called a scraper is provided on the back of the cutter head so as to cut the clod into small pieces. It has been known.

[0006]

However, in the above-mentioned prior art, the positions of the water supply port 12 of the water supply pipe and the sludge discharge port 11 of the sludge discharge pipe 7 are fixed with respect to the leading conduit 1, and therefore the water supply port 12 is provided. There is a problem that the flow path of water supplied from the chamber is almost constant, and stirring and cleaning in the chamber 8 cannot be efficiently performed. Further, although the stirring blade 9 has an effect of stirring the sludge 10 in the circumferential direction, it does not have the effect of press-fitting the sludge 10 into the sludge pipe 7, so that the clogging of the sludge pipe 7 is prevented and good cleaning is not possible. It was difficult.

The object of the present invention was made in view of the above points, and it is possible to efficiently stir and wash the sludge in the chamber, and to increase the sludge efficiency and the excavation speed. To provide a digging device.

[0008]

In order to achieve the above-mentioned object, the present invention provides a cutter head rotatably provided at the tip of a leading conduit and a driving means for rotating the cutter head through a rotary shaft. A chamber chamber formed in the front conduit at the back of the cutter head, a water pipe for feeding water into the chamber chamber, and a sludge pipe for discharging sludge in the chamber chamber , The water supply pipe is provided in the rotary shaft, and the water supply port at the tip of the water supply pipe is connected to the cutter head.
Formed on the back surface of the chamber and opened directly into the chamber,
One is characterized in that it possible directly opposite discharge mud port of the exhaust mud tube.

[0009]

According to the above structure, the chamber is directly connected to the water pipe.
The water sent into the chamber is discharged while rotating in the circumferential direction by the rotation of the cutter head, so that the flow of water reaches the entire chamber chamber, so that the stirring and cleaning effect in the chamber chamber can be enhanced. In addition, as the water supply port faces the mud discharge port according to the rotation and water is directly fed into the mud discharge port, the sludge can be forcibly sent to the mud discharge port, and the chamber chamber
Since the water stream can be directly injected into the sediment in front of the bottom mud discharge port
It is possible to effectively prevent the sludge discharge port from being washed away.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show the configuration of an embodiment of the present invention. In these figures, parts corresponding to those of the conventional example shown in FIGS. 4 and 5 are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 1 shows the overall configuration of this apparatus. Rotating shaft 5
Is rotationally driven by a motor 21 which is a drive means, and is propelled axially by a hydraulic jack 22 together with the leading conduit 1. On the other hand, a tank 23 and a water pump 24 are provided on the ground, and the water in the tank 23 is fed into the pipe 25 by the water pump 24. The pipe 25 is connected to a water swivel 27 provided on the rotary shaft 5 via a mud-sending / discharging switching device 26, and supplies water into the water pipe 6 inside the rotary shaft 5.

The sludge discharge pipe 7 is connected to a pipe 28, and the pipe 28 is connected to a sludge pump 29 via a sending / discharging sludge switching device 26. The sludge discharged by the sludge pump 29 is sent through the pipe 30 to the partition plate 3 in the tank 23.
The sludge is discharged to the sludge storage unit 32 partitioned by 1. Reference numeral 38 is a flow meter provided in the pipe 30. Further, the water supply pipe 6 and the sludge discharge pipe 7 are provided with a water supply stop valve 33 and a sludge stop valve 34, respectively. The water supply pipe 6 and the sludge discharge pipe 7 are connected by a bypass pipe 35, and the bypass pipe 35 is provided with a bypass valve 36.

2 and 3 show an essential part of the present invention, in which the water supply pipe 6 is axially provided in the center of the rotary shaft 5, and the tip of the water supply pipe 6 is curved in a U shape. And is provided in association with the cutter head 2. The water supply port 12 at the tip of the water supply pipe 6 comes to a position facing the sludge discharge port 11 as the cutter head 2 rotates.

Next, the operation of this embodiment will be described. With the hydraulic jack 22 installed in the starting shaft 37, the front conduit 1
The thrust force is transmitted to the bit 3 facing the ground through the. At the same time, the motor 21 transmits a rotational force to the bit 3 via the rotary shaft 5 to excavate the ground. The discharged soil is sent into the chamber 8 through the opening of the bit 3, and the water supplied from the water supply pipe 6 forms slurry-like sludge 10. This water is sent from the tank 23 into the pipe 25 by the water pump 24,
It is fed into the water pipe 6 through the feed / discharge mud switching device 26 and the water swivel 27.

The sludge 10 reaches the sludge pump 29 through the sludge pipe 7, the pipe 28, and the sending and discharging sludge switching device 26, and the sludge pump 29 allows the sludge storage section 3 of the tank 23 through the pipe 30.
It is discharged to 2. Sludge 10 discharged into the sludge storage unit 32
The water in the tank is returned to the tank 23 by the partition wall 31.

During the excavation work, the water supply stop valve 33 and the sludge stop valve 34 are open and the bypass valve 36 is closed, but when the excavation work is stopped, the water supply stop valve and the sludge stop valve are closed to bypass. By opening the valve 36, water can be supplied into the sludge discharge pipe 7 for cleaning.

According to the present embodiment, the water supplied from the water supply pipe 6 is discharged while rotating in the circumferential direction by the rotation of the cutter head 2, so that the flow of water reaches the entire chamber 8. The stirring cleaning effect can be enhanced. Further, the water outlet 12 at the tip of the water supply pipe 6 faces the sludge discharging port 11 in accordance with the rotation, and the water is directly fed into the sludge discharging port 11. Therefore, the sludge 10 is forcibly fed into the sludge discharging port 11. In addition, the mud discharge port 11 can be effectively cleaned. In addition,
The number of water supply ports 12 may be plural.

[0018]

As described above, according to the present invention,
A water supply pipe for supplying water into the chamber chamber was provided inside the rotary shaft of the cutter head, and the water supply port could be opposed to the sludge discharge port, so that the sludge in the chamber chamber can be efficiently stirred and washed. In addition, it is possible to improve the sludge discharge efficiency and the excavation speed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of an embodiment of a mud pressure type excavation device of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a leading conduit shown in FIG.

3 is a view on arrow A in FIG. 2. FIG.

FIG. 4 is an explanatory view showing a configuration of an example of a conventional tip conduit.

5 is a view on arrow B of FIG. 4. FIG.

[Explanation of reference symbols] 1 tip conduit 2 cutter head 3 bit 4 bearing 5 rotating shaft 6 water pipe 7 drainage pipe 8 chamber chamber 9 stirring blade 10 drainage 11 drainage port 12 water feed port 21 motor (driving means) 22 hydraulic jack 23 Tank 24 Water Pump 25 Pipe 26 Pipe Slurry Switching Device 27 Water Swivel 28 Pipe 29 Sludge Pump 30 Pipe 31 Partition Plate 32 Sludge Storage 33 Water Stop Valve 34 Sludge Stop Valve 35 Bypass Pipe 36 Bypass Valve 37 Start Axis 38 Flowmeter

Claims (1)

[Claims] 1. A cutter head rotatably provided at the tip of a tip conduit, drive means for rotatably driving the cutter head via a rotation shaft, and a chamber formed in the tip conduit at the back of the cutter head. a chamber, and the chamber interior to feed water Kyusuru water pipes, comprising a discharge mud pipe for discharging the waste sludge of the chamber interior, with a pre-Symbol water pipe provided in the rotation in the shaft, the said transmission water pipe Insert the water inlet at the tip into the cutter head.
Formed on the back surface of the chamber and opened directly into the chamber,
One, mud pressurized excavation apparatus characterized in that the directly opposable to discharge mud port of the exhaust mud tube.