JPS5826193A - Pipe propelling apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube propulsion device used when laying a pipe by press-fitting it into the ground under a road, etc. In particular, the present invention relates to a tube propulsion device used when laying a pipe by press-fitting it into the ground under a road. This invention relates to a tube propulsion device that cuts the excavated soil using high-pressure fine jet water, uses compressed air to transport the resulting excavated soil, and also makes it possible to adjust the direction of propulsion of the leading tube.

For construction methods that lay pipes in the ground, such as under roads.

There is a press-in propulsion method. In this method, a propulsion tube with a cutting edge at its tip is pressed into the ground laterally from a vertical shaft using a propulsion jack. The mechanism for carrying out the excavated soil that is pushed into the ground is troublesome, the pipe laying work is time consuming, and it is also difficult to correct the propulsion direction of the propulsion pipe.

The present invention overcomes the conventional drawbacks by providing a new type of pipe propulsion device, and enables highly efficient and easy removal of excavated soil pushed into the lead pipe as the lead pipe is propelled. , the purpose is to easily correct the direction of propulsion of the leading pipe.

For this purpose, in the tube propulsion device of the present invention.

As the lead pipe is propelled by the push pipe, the excavated soil that is pushed into the lead pipe from the cutting edge at its tip is crushed by high-pressure fine jet water from the nozzle that moves in a swirling motion, and this crushed soil is passed through the earth discharge pipe using compressed air. At the same time, the nozzle is made to move forward and backward, and the jet water from the forward end position 1 nozzle breaks the ground in front of the cutting edge of the leading pipe in the direction relative to the direction of correction of the propulsion of the leading pipe. This is designed to reduce the resistance to ground penetration of the conduit.

A specific embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In Figures 1 and 2, 1 is a leading pipe made of a steel pipe of a desired diameter, and a leading pipe l into the ground 2 is attached to the opening edge of the tip.
A cutting edge 3 is formed to facilitate the penetration of the blade, and a steel push pipe 5 is connected to the other end via a flexible joint mechanism 4t. By this, the leading pipe 1 is propelled into the ground 2. The blade opening 3 in the leading pipe 1 thus constructed
A guide tube 6 is airtightly and integrally fixed to the side along the length of the leading pipe 1, and inside this guide tube 6 is a cylindrical housing 8 whose front surface is sealed at least by a cover plate 7. Tube 6
The housing 8 separates the inside of the leading pipe 1 into front and rear parts, and the housing 8 separates the inside of the leading pipe 1 into front and rear parts. The inside of the leading pipe 1 on the front side of 8 is defined as a pressure chamber 10,
Excavation ±2α generated by propelling the leading pipe 1 into the ground is forced into the pressure chamber 10. Further, on the cover plate 7 of the housing 8.

It is located on the axis of the leading pipe 1 and rotatably and airtightly penetrates and supports the high pressure water pipe 11, and the pressure chamber 10 of this high pressure water pipe 11 is
At the tip of the side protrusion, there is a nozzle 1 that sprays a high-pressure thin jet of water.
2 is attached. The nozzle 12 is used for excavation ±2a pushed into the leading pipe 1 as the leading pipe 1 is propelled, and for crushing the ground 2 in front of the cutting edge.1. The jet of water 1
The direction 2a is such that the water is injected diagonally forward at an angle θf with respect to the axis of the high-pressure water pipe 11. A high-pressure water pipe 1 is connected to the protruding end of the high-pressure water pipe 11 in the housing via a swivel pipe joint 13, and this high-pressure water pipe 14 passes through the entire push pipe 5 and is extended to the above-ground ring, and is installed in the above-ground ring. By connecting to a high-pressure water supply pump (not shown), pressure and water necessary for crushing the ground and excavated soil can be supplied to the nozzle 12. Also.

A gear 15 is attached to the protrusion inside the housing of the high-pressure water pipe 11, and this gear 15 is connected to the motor 1 installed inside the housing 8.
The motor 16 is meshed with the gear 17 attached to the rotating shaft 16Z of the motor 6, and the motor 16 is driven to rotate at the same time as the high pressure water pipe 11 is rotated once at a predetermined number of revolutions.

The nozzle 12 is made to rotate.

Furthermore, the motor 16 is controlled to rotate forward and backward at a constant rotation angle by external operation. This is because when the direction of propulsion of the leading pipe 1 is corrected, the ground 2 in front of the cutting edge in the corrected direction is crushed over a predetermined range.

Further, a compressed air supply pipe 18 is disposed inside the lead pipe 1, and one end 18a thereof is opened toward the upper blade opening 3 side in the pressure chamber 10, and a hose 19 connected to the other end is connected to the push pipe 5. The entire air is drawn out to the ground ring and connected to a compressed air supply device (not shown) such as a compressor installed in the ground ring, so that compressed air is supplied into the entire pressure chamber 10. Furthermore, an earth removal pipe 20 is disposed along the length of the leading pipe 1 and the pusher pipe 5 on the lower side, and this earth removal pipe 20 collects the crushed excavated soil by jet water 12a''?% from the nozzle 12. It is for transporting and unloading using compressed air applied in the pressure chamber 10, and one end thereof is opened into the pressure chamber 10, and the other end is opened at the excavated soil discharge position of the above-ground ring. Is there a direction detector for nozzle 12 in 8?
1 is provided, and this direction detector 21 is configured by 1, for example, a magnet piece 21a attached to the high-pressure water pipe 11 so as to match the direction of the nozzle 12, and a magnet piece 21α arranged in a ring shape around the high-pressure water pipe 11. The reed switch 214 is turned on.

Next, the operation of the apparatus according to the present invention configured as described above will be explained.

First, in a state where the leading pipe 1 is horizontally press-fitted into the ground 2 from the cutting edge 3 side, when the pushing force by the propulsion jack is applied to the pushing pipe 5, the leading pipe 1 moves through the ground 2 as shown by the arrow in FIG. It is press-fitted and propelled in the X direction.

In addition, the water is fed to the high-pressure water pipe 11 through a high-pressure water pump installed on the ground, etc., and is injected from the nozzle 12 into the pressure chamber 1o as a high-pressure thin jet of water 12α. High pressure water pipe 11
Rotate around the center.

The compressed air from the compressed air supply device is supplied to port 19.
A pressure force is fed through the entire supply pipe 18 into the chamber lo.

In such a state, when the excavated soil 2a is pushed into the pressure chamber 1o of the leading pipe 1 as the leading pipe 1 is propelled through the ground,
A columnar excavation ±2α corresponding to the inner diameter of the leading pipe 1 is sequentially cut and crushed into a conical shape as shown in FIG.

At this time, for example, if the rotation speed of the nozzle 12 is i60 RPM and the propulsion speed of the leading pipe 1 is 60 C''!/min, the pitch width of the excavation ±2a cut by the high-pressure wire jet water 12a will be 1 cm, and the pitch width of the leading pipe 1 will be 1 cm. The excavated soil 2a entering the pressure chamber 1o can be sufficiently crushed.
The pressure of 12tZ of water jetted from 100 to 200
When the jet water diameter (nozzle opening diameter) is set to 1 to 1.5 mm, the effective cutting range of the jet water 12α for general ground soil is 20 cm or more. and.

The water content ratio of crushed soil by jet water 12α from the nozzle is:
The water content is only increased by several tens of percent compared to the water content of the natural ground being propelled, so the crushed waste soil is not altered into mud by the water injected into the pressure chamber 10. This facilitates the transport of the crushed soil and the treatment after it has been transported to the ground, which will be described later. Furthermore, when crushing by the jet water 12α of excavation ±2a accompanying the propulsion of the leading pipe 1, the housing 8 including the nozzle 12 is positioned at the retreating end by the cylinder 9.

As a result, the position and installation angle θ of the nozzle 12 are set so that the jet water 12α from the nozzle 12 is injected into the inner wall of the pipe that is about 5 CWL inward from the cutting edge 3 of the leading pipe 1. There is a flap to prevent the jet water 12fZ from crushing the ground 2 in front of the leading pipe cutting edge 3. Further, in the case of the soft ground f, it is desirable that the injection point of the jet water 12α against the inner wall of the pipe be further inside than in the case of FIG.

On the other hand, the pressure chamber 10 is
The compressed air blown into the drain pipe 20 passes through the lead pipe 1.
The crushed soil is discharged outside, but at the same time, the crushed soil is pushed into the soil discharge pipe 20, and the compressed air flowing inside the soil discharge pipe 20 connects the crushed soil toward the exit of the soil discharge pipe 20, pneumatically transports it, and carries it out. do. At this time, depending on the nature of the soil, the crushed soil may adhere to the mouth of the earth removal pipe 200 Å and the inside of the earth earth removal pipe, clogging the earth earth removal pipe 20 due to its viscosity. As the soil rises, the soil clogging the earth discharge pipe 20 due to this pressure will exhibit an extraordinary transport situation, and as a result, the soil within the earth earth discharge pipe 20 will be reliably pushed out to the exit side of the earth earth discharge pipe 20 without clogging. It turns out. therefore.

The soil that is sequentially crushed by 12 tL of jet water as the leading pipe 1 is propelled can be carried out smoothly and continuously by compressed air.

Next, the operation for correcting the direction of propulsion of the leading pipe 1 will be explained as follows.
The diagram will be explained.

Figure 2 shows a case where the leading pipe 1 is being propelled downward through the ground 2 and the direction is corrected upward. In this case, first, the propelling of the leading pipe 1 is stopped. , the nozzle direction detector 21 is held in an operating state, and the direction detector 21 detects the direction of the nozzle 12.
6 is driven in steps or the like to rotate the high-pressure water pipe 11, and the nozzle 12 is positioned so as to face obliquely upward in the correction direction 1 of the leading pipe 1, for example, as shown in FIG. In this state, the entire housing 8 is moved by the cylinder 9 to the forward end as shown in FIG. set. Then, the water pipe 14 is connected to the high pressure water supply pump. Water is sent into the high-pressure water pipe 11 through the swivel pipe joint 13, and jet water 12α is injected from the nozzle 12 onto the ground 2 in front of the cutting edge.At the same time, the motor 16 is controlled by the signal from the nozzle 4 direction detector 21, and the nozzle 12 ' While swinging in the forward and reverse directions within a range of about 45°, the leading pipe 1 is slightly advanced. As a result, the ground above the leading pipe 1 located in front of the penetration blade opening 3 is fractured by the jet water 12Q from the nozzle 12 into an arc shape larger than the diameter of the leading pipe as shown in FIG. That is, a cavity 22 is formed in the front part of the first penetration blade opening 3 facing the leading direction of propulsion. At this time,
Compressed air is blown into the pressure chamber 10 through the hose 19° supply pipe 18, and the soil crushed by the jet water 12α is pneumatically conveyed through the earth discharge pipe 20 and carried out.

Once the ground 2 in the leading pipe propulsion direction is crushed to a predetermined state in this way, the control of the motor 16 by the nozzle direction detector 21 is stopped, and the entire casing 8 including the nozzle 12 is activated by the cylinder 9 FiE2. Move it one step to the rearward end shown in the figure,
It is set so that the jet water 12α from the nozzle 12 is projected against the inner wall of the pipe at the rear of the cutting edge. In this state 1, when the leading pipe 1 is propelled by the push pipe 5 while the motor 16 is driven to rotate normally and the nozzle 12 is rotated, the leading pipe 1 moves as shown in FIG. The direction will change upward relative to the ground 2.

Note that the direction of propulsion of the leading pipe 1 can be corrected by the above operation method not only in the case shown in FIG. 2, but also in any direction of 360 degrees.

Furthermore, the rotating means for the nozzle 12 and the advancing/retracting mechanism for the nozzle 12 are not limited to the structures of the embodiments.

As described above, according to the present invention, the excavated soil that is pushed into the pressure chamber of the leading pipe from the cutting edge as the leading pipe is propelled is crushed by the high-pressure fine jet water from the nozzle that rotates, and the crushed soil is There is a system in which compressed air supplied into the pressure chamber is used to carry out the excavated soil through a discharge pipe, so that the excavated soil produced by the propulsion of the lead pipe can be carried out automatically and with high efficiency without the use of human hands. Moreover, since the excavated soil pushed into the pressure chamber of the lead pipe is crushed by high-pressure fine jet water, there is no frictional resistance of the excavated soil pushed into the lead pipe.

This has the effect of making it possible to reduce the propelling force on the lead pipe by that much, and also to increase the propulsion speed of the lead pipe as the soil removal efficiency improves.

In addition, the nozzle is made to be able to move forward and backward, and the forward end position of this nozzle [
Since the jet of water injected from the nozzle crushes the ground located in front of the cutting edge of the leading pipe, it is possible to correct the direction of propulsion of the leading pipe.

[Brief explanation of drawings]

The drawing shows an example of a tubular propulsion device according to the present invention 1
．． FIG. 1 is a cross-sectional view showing a normal tube propulsion state, and FIG. 2 is a cross-sectional view showing a corrected state of the leading tube propulsion direction. 1... Leading pipe, 2... Ground, 3... Blade mouth, 5...
・Push pipe. 6... Guide tube, 7... Cover plate, 8... Housing, 9
... Cylinder, 10 ... Pressure chamber, 11 ... High pressure water pipe, 12 ... Nozzle, 13 ... Swivel pipe joint, 1
4... Water pipe. 15, 17...Gear, 16...Motor, 18...
Compressed air supply 9.19... Hose, 20... Earth discharge pipe, 21... Nozzle direction detector. Patent applicant: New Technology Development Co., Ltd.

Claims (4)

[Claims] (1) A guide pipe with a cutting edge at the tip, a push pipe connected to the rear of the guide pipe to push the guide pipe into the ground, and a push pipe formed at the front part of the guide pipe to excavate soil as the guide pipe is propelled. A pressure chamber into which is pushed, and a pressure chamber provided so as to be able to rotate on the axis line within this pressure chamber and move forward and backward. a nozzle that injects high-pressure fine jet water to crush the soil; a supply pipe that supplies compressed air to carry out the crushed soil into the pressure chamber; and an earth discharge pipe that communicates with the pressure chamber and pneumatically transports the crushed soil. and a nozzle direction detector that detects the jetting direction of the nozzle. (2) The tubular body propulsion device according to claim 1, wherein the jet water from the nozzle is jetted in a forward direction of the torso. (3) The tubular body propulsion device according to claim 1 or 2, wherein the nozzle is moved forward and backward by a cylinder. (4) The tube propulsion device according to claim 1 or 2, wherein the nozzle is rotated by a motor.