JPH0674712B2 - Pipe burying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention relates to a pipe burying device for burying pipes in the ground by using an underground drilling machine that operates under fluid pressure.

(2) Conventional Technology Conventionally, in order to bury a pipe in the ground using an underground through hole machine, as shown in FIG. 6, a launch pad 02 is fixed in a pit 01, and the launch pad 02 is placed on the launch pad 02. A pipe 03 for embedding is provided in the underground pipe 05, and a conical cone 04 is provided at the rear end of the pipe 03 so that
The front end of the pipe is engaged, and the compressor 06 operates the underground through hole drilling machine 05 to push the pipe 03 into the ground for embedding.

(3) Problems to be Solved by the Invention However, in the conventional embedding means, since the pipe 03 and the underground penetration machine 05 are connected in series, as shown in FIG. L is at least pipe 03 and underground drilling machine 05
Since the pit 01 becomes large and a great amount of labor and cost are required for excavating the pit 01, and the work is difficult on a narrow road. was there.

The present invention has been proposed in view of the above, and makes it extremely easy to assemble an underground through-hole machine into a pipe and, at the same time, shortens the pit length as much as possible in comparison with the prior art to push the pipe into the ground. It is an object of the present invention to provide a new pipe burying device capable of remarkably reducing burial work labor and cost.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention is set with a pipe on a launch pad in a pit, and a driving force for driving the pipe into the ground. Which is a pipe embedding device for applying a hollow cylindrical connecting member which has a diameter smaller than that of the pipe and which can be inserted into the pipe from its rear end, and a connecting member for applying a propulsive force to the connecting member. And a tapered first male taper surface on the outer circumference of the front end of the underground penetration machine, and the first male taper on the inner circumference of the front end of the connecting member. Female tapered surfaces that fit into the tapered surfaces are respectively formed, and a tapered second male tapered surface that abuts the rear end of the pipe is formed on the outer circumference of the rear end of the connecting member, and the outer circumference of the front end of the connecting member is formed. Is engaged with the inner circumference of the pipe to connect the connecting member to the pipe. It is characterized in that each of them is provided with a supporting member for holding it in the center position.

(2) Example Hereinafter, an example of the present invention will be described with reference to the drawings. The underground through-hole machine 1 for installing the pipe 10 in the pit 22 and burying the pipe 10 in the ground has a cylindrical shape as a whole. The air pressure introduced from the compressor 2 through the hose 3 provides a forward force or a backward force. Since this underground drilling machine 1 has a conventionally known structure, its detailed description is omitted.

The underground through-hole machine 1 is mounted in a hollow cylindrical connecting member 4 having a larger diameter than that. An engagement piece 5 is fixed to the inner periphery of the front end portion of the connection member 4, and a female taper surface 6 that widens rearward is formed on the inner surface of the engagement piece 5. A male taper surface 7 formed on the outer periphery of the front end portion of the underground through hole machine 1 is brought into contact with the ground through hole machine 1 to transmit the advancing force of the underground through hole machine 1 to the connecting member 4. Thus, the male taper surface 7 constitutes the first male taper surface of the present invention.

An engagement member 8 is integrally provided on the outer periphery of the rear end portion of the connection member 4 so as to extend radially outward, and the outer surface of the engagement member 8 has a tapered male taper as a second male taper surface. The surface 9 is integrally formed, and the outer surface of the surface 9 is brought into contact with the rear end of the pipe 10. In this case, when the diameter of the pipe 10 is small, the engaging member 8 directly contacts the rear end of the connecting member 4, and when the diameter of the pipe 10 is large, the auxiliary engaging member 11 is attached to the outer surface of the engaging member 8. After mounting, the male taper surface 12 of the auxiliary engaging member 11 is brought into contact with the rear end of the connecting member 4. In any case, the forward force transmitted from the underground through-hole machine 1 to the connecting member 4 is evenly transmitted to the rear end of the pipe 10 through the male taper surface 9 (or 12).

The lashing member 13 formed in a flange shape is for lashing the underground through-hole machine 1 into the connecting member 4, and a female taper surface is formed in the front portion of the lashing member 13, and this female taper is formed. By abutting the surface against the rear conical portion 15 of the underground through hole drilling machine 1 and tightening the bolts 14 for connecting the fastening member 13 and the connecting member 4, the female taper surface of the fastening member 13 is penetrated into the ground. By pressing the rear conical portion 15 of the perforator 1, the underground perforator 1 is fixed to the connecting member 4 integrally.

The engaging member 8 is provided with a plurality of arcuate holes 16 for inserting a nozzle gun (not shown) for injecting water between the pipe 10 and the connecting member 4. By injecting water from the nozzle gun, the sediment in the pipe 10 can be fluidized, and the fluidized sediment can be removed from the pipe 10.

A plurality of holes 17 having the same shape as the holes 16 are also formed in the fastening member 13 on the same axis as the holes 16, and the holes 17 are for passing the nozzle gun.

A plurality of support members 18 are radially fixed to the front part of the connection member 4, and the tip ends of these support members 18 are piped.
It engages with the inner circumference of 10 and acts to hold the front part of the connecting member 4 in the center of the pipe 10, that is, in a concentric position with respect to the pipe 10.

In the figure, 19 is a bracket for reinforcing the engagement piece 5,
20 is a bracket for reinforcing the engaging member 8, 21 is
A reinforcement ring 23 provided on the outer periphery of the rear end of the pipe 10 for preventing the rear end of the pipe 10 from expanding is a launch pad provided in the pit 22.

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

First, as shown in FIG.
The male taper surface 7 on the outer periphery of the front end portion is inserted into the female taper surface 6 of the engaging piece 5 so as to be in contact therewith.

Next, the female tapered surface of the fastening member 13 is brought into contact with the rear conical portion 15 of the underground through hole machine 1, and the underground through hole machine 1 is fixed to the connecting member 4 by tightening the bolt 14.

The connecting member 4 mounted and fixed to the underground through hole machine 1 is inserted into the pipe 10 to be buried in the ground, and the male taper surface 9 of the engaging member 8 or the auxiliary engaging member is provided at the rear end of the pipe 10. The male tapered surface 12 of 11 is brought into contact.

The piping assembly A is assembled outside the pit 22 through the above steps.

The pipe assembly A assembled as described above is lowered from the outside of the pit 22 to the inside of the pit 22 in the as-is state, that is, in the completed assembled state in which the pipe 10 is substantially horizontal as shown in FIG. Install.

At this time, as shown in FIG.
The length can be made shorter than the total length of 10 and each length of the underground penetration machine 1.

After mounting the pipe assembly A on the launch pad 23, the compressor 2 operates the underground through hole drilling machine 1 to advance the pipe 10 into the ground.

At this time, the forward conical portion 7 becomes the female taper surface 6 and the male taper surface 9 of the engaging member 8 (or the male taper surface 12 of the auxiliary engaging member 11) becomes the pipe 10 by the forward movement of the underground through hole drilling machine 1. Since it will bite into each of the rear ends, the pipe assembly A, that is, the pipe 10 and the underground through-hole machine 1 integrally move forward in the soil. Further, the earth and sand tend to enter the pipe 10 and weaken the forward force of the underground through hole drilling machine 1. In that case, insert a nozzle gun into the holes 17 and 16 of the fastening member 13 and the engaging member 8. High-pressure water is sprayed on the earth and sand. As a result, the earth and sand are fluidized and discharged from the holes 16, and the advancing force of the underground penetration machine 1 can be maintained.

When the entire pipe 10 is substantially buried in the ground, the underground through-hole machine 1 is moved backward and separated from the pipe 10.

By repeating the above work, the total length of the buried pipe can be increased.

Although one embodiment of the present invention has been described above, the present invention is not limited to that embodiment, and various embodiments are possible within the scope of the present invention.

C. Effect of the Invention As described above, according to the present invention, the underground through-hole machine is concentrically inserted into the pipe from the rear of the pipe outside the pit, through the hollow cylindrical connecting member. Assembled,
Since the assembly was dropped from the outside of the pit into the pit from the outside of the pit so that it can be set collectively on the launch pad,
The pit can be made as small as possible in the length direction of the underground drilling machine as compared with the conventional one, and the labor and cost for excavating the pit can be significantly reduced. Even if the pit is formed small as described above, the assembly work efficiency of the pipe assembly can be suppressed because the assembly work of the pipe assembly can be performed outside the wide pit. Significant reduction can be achieved.

Further, particularly, a tapered second male taper surface that abuts the rear end of the pipe is provided on the outer periphery of the rear end of the connecting member, and the outer periphery of the front end of the same connecting member is engaged with the inner periphery of the pipe to connect the connecting member. Since the supporting members for respectively holding the pipes at the concentric position with respect to the pipe are respectively provided, the concentric posture of the connecting member with respect to the pipe can be easily and accurately obtained, and the connecting member can be connected to the rear end of the pipe through the second male tapered surface. Therefore, the taper fitting between the inner periphery of the front end portion of the connecting member and the outer periphery of the front end portion of the underground through hole machine facilitates the alignment between them. The propulsive force can be transmitted extremely smoothly from the underground through-hole machine to the pipe side through the connecting member without unevenness, and therefore the pipe can be efficiently embedded in a predetermined position in the soil. Moreover, since the male taper surface on the outer periphery of the rear end of the connecting member can be accurately engaged with the rear end of another pipe having a slightly different inner diameter without causing radial play, it can be adapted accordingly. This is convenient because the dimensional range of various pipes is expanded.

[Brief description of drawings]

Fig. 1 is an overall sectional view of the pipe burying device, and Fig. 2 is Fig. 1A-
A sectional enlarged view, FIG. 3 is a BB sectional enlarged view of FIG. 1, FIG. 4 is a CC sectional enlarged view of FIG. 1, FIG. 5 is a use state diagram, and FIG. 6 is a conventional use state diagram. 1 ... underground through hole drilling machine, 4 ... connecting member, 6 ... female taper surface, 7 ... first male taper surface, 9 ... second male taper surface, 10
...... Piping, 22 ...... Pit, 23 ...... Launch pad

Claims (1)

[Claims] 1. A pipe embedding device for setting a pipe (10) on a launch pad (23) in a pit (22) together with a pipe (10) for imparting a propulsive force to drive the pipe (10) into the ground. And a hollow cylindrical connecting member (4) which is formed to have a smaller diameter than the pipe (10) and can be inserted into the pipe (10) from its rear end, and to give a propulsive force to the connecting member (4). The underground through-hole machine (1) is inserted into the member (4) from the rear end thereof, and the tapered first male taper surface (7) is provided on the outer periphery of the front end portion of the underground through-hole machine (1). Further, female taper surfaces (6) fitted to the first male taper surface (7) are respectively formed on the inner circumference of the front end portion of the connection member (4), and the connection member (4) is formed.
A tapered second male taper surface (9), which comes into contact with the rear end of the pipe (10), is provided on the outer periphery of the rear end portion of the pipe (10), and the connecting member (4).
A support member (18) for engaging with the inner circumference of the pipe (10) and holding the connecting member (4) in a concentric position with respect to the pipe (10) is provided on the outer circumference of the front end of the pipe (10). The characteristic is a pipe burying device.