JP2930651B2 - Mud circulation type pipe burying equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a muddy water circulation type pipe burying apparatus.

(Prior art) As a device for burying pipes in the ground, an auger screw is conventionally inserted into a pipe to be buried, and the excavated soil is excavated by an auger screw while excavating the ground at the tip of the auger screw. The pipe is sent to the rear through the pipe and is carried out from the shaft to the ground surface using a bucket, while the pipe is pressed from the rear and embedded.

(Problems to be Solved by the Invention) However, in the above-described conventional technology, the earth and sand sent to the rear of the pipe is carried out to the ground by a bucket, which is a complicated operation, requires a lot of trouble, and is inefficient. In addition, there are various problems such as a large power required for lifting and lowering the bucket.

In view of this, the present invention allows the excavated earth and sand to be discharged to the ground without human intervention, and allows the muddy water used for this to be circulated and used, and simplifies the earth discharging equipment and improves the earth discharging efficiency. The purpose of the present invention is to provide a muddy water circulation type pipe burying device capable of improving the water quality.

(Means for Solving the Problems) As means for solving the problems of the conventional technology,
According to the present invention, a leading pipe is provided at the tip of a pipe to be buried, the inside of the leading pipe is divided into a cutting edge portion and a rear portion by a partition wall, and a cutting head is rotatably provided at the cutting edge portion and should be embedded. A rotary rod for rotating the excavating head is inserted and supported in the pipe, and a sedimentation tank and a pump installed on the ground, which are opened to the blade side through the partition wall and led to the ground through the pipe, are supported in the pipe. The pipe for mud sending and discharging is connected to the pipe, and the pipe for mud sending and discharging is composed of two pipes for mud sending and mud. Coupled by a flange having an opening,
A receiving roller for supporting the rotating rod is supported by a bracket for fixing a central portion of the pipe, and the liquid for discharging the earth is circulated through the pipe for sending and discharging the mud.

(Operation) While the pump is operated to circulate muddy water, the rotating rod is rotated through the drive unit, and the excavation head is rotated to excavate the tip ground and press the pipe from behind to bury it. The earth and sand excavated by the excavation head is mixed with muddy water supplied to the cutting edge through a mud feeding pipe, sent to a sedimentation tank through a mud discharging pipe, and the sediment deposited is discharged, and the supernatant is again pumped. It is sent to the blade port.

Hereinafter, the present invention will be described with reference to examples shown in the drawings.

In the muddy water circulation type pipe burying device according to the present invention, as shown in FIG. 1, a side view of a state at the time of excavation, a driving unit 3 advances and retreats on a guide rail 2 laid at the bottom of a shaft 1 cut from the ground surface. The driving unit 3 is movably mounted, and a propulsion cylinder 5 is interposed between the driving unit 3 and a reaction force receiver 4 in the shaft 1, and the driving unit 3 advances by driving the extension of the propulsion cylinder 5 ( (Left line in the figure).

A tube port 6 is provided at a front portion of the drive unit 3, and a rear end of a tube 7 to be buried in the tube port 6 is in contact with the pipe port 6.

On the other hand, a leading conduit 8 is connected to the tip of the pipe 7. The leading conduit 8 is formed by a partition wall 9 provided therein to form a cutting edge 10.
A cutting head 12 is provided at the inner end of the blade opening 10, and a stirring blade 13 is rotatably provided behind the cutting head 12. The cutting head 12 and the stirring blade 13 are connected to the pipe 7. It is connected to the tip of the rotating rod 14 inserted into the inside.

The rotating rod 14 is supported on the front conduit 8 by a bearing 15 on the way, and the rear end thereof is connected to the output shaft 17 of the drive unit 3 to be driven to rotate.

A pipe 18 for mud feeding is provided as a pipe 18
A and a draining pipe 18B are fixedly provided, and each pipe 18A,
The front end of 18B is opened through the partition wall 9 into the cutting opening 10, the rear end is opened at the rear end of the front conduit 8, and the rear end is provided with a connecting flange 19.

These are provided with pinch valves 20A and 20B which can be opened and closed by remote control, as shown in FIG. 4, in the middle of the mud feeding pipe 18A and the mud discharging pipe 18B. At the rear position, pipes 18A and 18B for feeding and discharging are connected by a bypass pipe 21.
A pinch valve 22 is also inserted in the middle of 21.

As shown in FIG. 5, the pipe 23 for feeding and discharging mud disposed in the pipe 7 has a flat surface, a side face is partially cut away in FIG. 6, and a right end face is shown in FIG. It consists of a pipe 23A and a sludge pipe 23B, and both ends of these pipes 23A, 23B are flanged 24,
The flange 25 on the tip end side is fixed to the flange 19 of the pipe 18A, 18B for feeding and discharging mud in the front conduit 8 by a bolt or the like. A bracket 16 connects the flange 19 and the rear end of the leading pipe 8.

Hose 26, 27 are connected to the rear ends of these pipes 23A, 23B. The hose 26 of the pipe 23A for mud feeding is connected to the supernatant tank 29 of a sedimentation tank 28 installed on the ground through a mud pump 30. The hose 27 of the pipe 23B for mud discharging is connected to the mud It is connected to the upper part of the precipitation tank 28 via a pump 31.

The middle of these hoses 26 and 27 is connected by a communication pipe 32, which is provided with a valve 33 so as to be openable and closable.
5,36 are provided respectively. These valves are shaft 1
It is placed in an easy-to-operate place. In the drawing, reference numeral 34 denotes a flow meter provided in the middle of the hose 27 for detecting the amount of discharged sludge.

At a longitudinally intermediate position between the mud feeding pipe 23A and the mud discharging pipe 23B, as shown in FIG.
A bracket 38 having an opening 36 through which the lower part is supported in the tube 7 by legs 37, 37 is mounted, and the receiving rods 39, 39 mounted on the bracket 38 rotate the rotating rod 14 in a rotational manner. It is designed to support.

In the figure, reference numeral 40 denotes a pressure detector provided in the blade port 10,
The internal pressure is detected, and the sludge pumps 30 and 31 are controlled based on the detected value to adjust the sludge amount. Reference numeral 41 denotes a hydraulic cylinder for correcting the direction, which is provided on the rear portion 11 of the front conduit 8 at the up, down, left and right positions, and operates when the course of the blade portion 10 deviates from a predetermined line to correct the direction of the blade portion 10. Reference numeral 42 denotes a hydraulic unit.

 Next, the operation of the above embodiment will be described.

When the muddy water is circulated by operating the mud pump 30 and the mud pump 31 and the rotating rod 14 is rotated by the drive unit 3, the muddy water is sent into the blade port 10 through the hose 26 and the mud pipes 23A and 18A. Then, the earth and sand excavated by the excavation head 12 and the muddy water are mixed by the stirring blade 13, and the muddy water is sent to the sedimentation tank 28 through the drainage pipes 18 B and 23 B and the hose 27. As the mud used here, a bentonite solution is mainly used, but fresh water may be used.

When the driving unit 3 is advanced by the propulsion cylinder 5 while discharging the excavated earth and sand in the form of muddy water to the ground, the rear end of the pipe 7 is pressed through the pipe receiving port 6 and the pipe 7 is embedded in the ground. I do. At this time, the supply amount and the discharge amount of the muddy water are adjusted based on the pressure detection in the blade port 10 by the pressure detector 40 and the flow rate detection by the flow meter 34.

When the insertion of the pipe 7 progresses and a new pipe is added, the pinch valves 20A and 20B of the feed / discharge pipe 18 are closed by remote operation at the rear, and the pinch valve 22 of the bypass pipe 21 is opened to open the pipe for feeding mud. Mud water is circulated through 18A and the drainage pipe 18B to discharge the soil inside. Then, the drive unit 3 is retracted, a new pipe and a pipe 23 for feeding and discharging mud are added between the buried pipe 7 and the pipe receiving port 6 of the drive unit 3, the pinch valves 20A and 20B are opened, and the bypass pipe 21 is opened. Pinch valve 22
Close and continue the pipe burial work again. When these valves are added, the valves 35 and 36 are closed, and the valve 33 of the communication pipe 32 is opened.
You do not have to stop every time you add 30,31.

〔The invention's effect〕

As described above, according to the present invention, a mud pipe is disposed in a pipe to be buried, and the mud pipe is connected to a sedimentation tank and circulated. Mixing and sending to the sedimentation tank by the pipe for mud drainage and sending the supernatant of the sedimentation tank to the cutting edge by the pipe for muddy feed. It is very efficient to discharge earth and sand without the trouble of transporting it to the ground. In addition, since the power to be used can be provided by rotating most of the rotating force to the rotation of the excavating head, the driving unit can be significantly reduced in size as compared with the conventional one, and the excavating distance can be reduced when using the conventional auger screw. Longer distance alone has a limitation in long-distance propulsion because the transport resistance of excavated earth and sand increases, but according to the present invention, even if the burial distance of the pipe is increased, there is no effect on the discharge of earth and sand, and the rotating rod is not affected. , Supported by a receiving roller that is supported by a bracket that fixes the middle part of the pipe for sending and discharging mud, so that the rotating rod can always be kept in a straight line with a compact configuration, enabling long-distance propulsion. There are various effects such as

[Brief description of the drawings]

FIG. 1 is a side view in partial section showing a use state of one embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a blade port in FIG. 1,
FIG. 3 is a cross-sectional view corresponding to the line III-III in FIG. 2, FIG. 4 is a plan view of a part of a sending and discharging mud pipe in the front pipe, and FIG. 6 is a side view, FIG. 7 is a right end view of FIG. 5, and FIG. 8 is a view of FIG.
It is a VII-VII line view. 1 ... shaft, 3 ... drive unit, 5 ... propulsion cylinder, 6 ...
… Pipe socket, 7… pipe to be buried, 8… tip pipe, 9…
Bulkhead, 10… Cutting edge, 12… Drilling head, 13… Stirring blade, 14… Rotating rod, 18,23 …… Sludge pipe, 18A, 2
3A …… Pipe for mud feed, 18B, 23B …… Pipe for mud discharge, 21…
… Bypass pipe, 26, 27… Hose, 28 …… Settling tank,
30… Sludging pump, 31… Sludge pump, 39… Receiving roller.

Continuation of the front page (56) References JP-A-57-155496 (JP, A) JP-A-59-84092 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 9 / 12 E21D 9/06 301 E21D 9/06 311

Claims (1)

(57) [Claims] 1. A leading pipe is provided at the tip of a pipe to be buried, and the inside of the leading pipe is divided into a cutting edge portion and a rear portion by a partition wall.
A drilling head is rotatably provided at the cutting edge portion, and a rotary rod for rotating the drilling head is inserted and supported in a pipe to be buried. And a pipe for sending and discharging sludge connected to the sedimentation tank and pump installed on the ground through the ground. This pipe for sending and discharging mud is composed of two pipes for sending and discharging mud. Both ends of these pipes are connected by a flange having a rotating rod insertion opening in the center,
A muddy water circulation system characterized in that a receiving roller for supporting the rotary rod is supported on a bracket for fixing a central portion of these pipes, and a liquid for discharging the soil is circulated through a pipe for sending and discharging mud. Pipe burying equipment.