JPS6188084A - Instrument for replacing piping - 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 (Field of Industrial Application) The present invention relates to a device for replacing old pipes such as electric wires and water pipes buried underground or in buildings with new pipes.

(Prior art) A large number of electric wires, telephone wires, etc. bundled together and housed in lead pipes or synthetic rubber pipes and buried underground or in buildings, or underground water pipes, gas pipes, etc. When this pipe becomes old or lacks capacity, when removing the old pipe and replacing it with a new one, conventionally the old pipe had to be dug out underground or from the building and replaced with the new pipe. Not only was the amount of work and expense involved, but this replacement was virtually impossible if there was a building above underground pipes or if the pipes were inside a building.

Therefore, the inventors proposed a method for replacing pipes installed underground, which is the title of the invention in Japanese Patent Application No. 59-133848.
He invented a construction method in which a head equipped with a crushing device for crushing old pipes installed underground is press-fitted into the old pipes, and a new pipe is introduced into the ground in contact with the head. The present invention is one of the heads used in the above invention, and is a pipe replacement device for crushing old pipes and laying new pipes, which was invented and improved based on subsequent experiments.

(Problem to be solved by the invention) In order to replace underground pipes etc. with new pipes,
As mentioned above, there was a problem in that the old pipes had to be dug out. In addition, in the invention proposed by the present inventors, the size of the hole in the ground after crushing old pipes cannot be freely set using a simple crushing device, and the size of the hole in the ground after crushing old pipes cannot be freely set. Another drawback was that when telephone wires were bundled and housed in a lead pipe, and then several wires were tied together in a wooden frame, etc., the adjacent lead pipes that were intended to be used in the future would also be damaged. The present invention eliminates such drawbacks by connecting an old pipe crushing tool and a tool for cutting old pipes together, and operating either or both of them as necessary to remove adjacent pipes. To provide a piping replacement tool that can perform construction work without damaging the pipe, and can also control the size of an underground hole for introducing a new pipe.

(Means and effects for solving the problem) The present invention includes a part having a crushing fitting for crushing or cracking the old pipe by opening and closing by mechanical force, and a hard member such as ceramics around the part, which is opened and closed by mechanical force to crush or crack the old pipe. By connecting the cutting part for cutting old pipes by rotating a hard member and the part for installing new pipes to introduce new pipes underground, a crushing device is used to crush other pipes. If there is a risk of damaging the piping, selectively activate only the cutting part to avoid damaging other piping, or activate the cutting part after the crushing part to avoid damage to the area where new piping should be installed. This is a pipe replacement device that allows you to control the size of the hole inside.

(Example) The present invention will be described in detail below according to an example shown in the drawings. FIG. 1 is a conceptual side view of a pipe replacement device in which the present invention can be implemented. This device is operated by being pulled by a traction wire 1 guided through the old pipe by a piano wire or the like, and passed through the old pipe.

Connect the spacer ball 2 following the traction wire 1. The spacer ball 2 used has a diameter approximately equal to the inner diameter of the old pipe. This spacer ball guides the equipment that follows, so even if the old piping is somewhat curved, the equipment will be guided along the curve inside the old piping.

Next to the spacer ball, connect the part 1 with the crushing fittings. As shown in the partially cutaway side view of FIG.
．． 4' is attached, and the crushing metal fitting is configured to be opened and closed by hydraulic pressure from a hydraulic hose 6 using a hydraulic jack 5.5'. Therefore, the old pipe can be crushed or cracked from the inside by opening and closing the crushing fitting using the hydraulic jack. Whether the old piping is to be crushed or cracked can be selectively operated by controlling the degree of opening and closing of the crushing fitting using the hydraulic pressure of a hydraulic pump (not shown).

The portion having the crushing metal fittings is connected to the spacer ball by a connecting part 7 and a connecting metal fitting 8.

Next, the cutting section 1 is configured such that a hydraulic motor is installed in the cylindrical portion 10 thereof, and the truncated conical portion to which the hard member described later is attached is rotated by the hydraulic motor via a swivel. A truncated conical portion 11 is rotatably provided in front of the truncated conical portion, and ceramics 12 are embedded and attached to the surface of the truncated conical portion in a vertically aligned manner as shown. Then, by rotating the truncated conical part 11 with a rotating device provided in the cylindrical part 10, a ceramic layer is formed on the surface.
The truncated conical part 11 with the truncated conical part 2 rotates to cut the old pipe that has been crushed or cracked by the crushing fitting 4.

The outer diameter of the truncated conical portion 11 and the cylindrical portion IO is made to be approximately equal to the inner diameter of the new pipe.

At the rear end of the cutting part l formed by the truncated conical part if and the cylindrical part lO, there is provided a new pipe attachment part 14 for attaching the new pipe 13 shown by the dotted line in FIG. Guiding new piping into a hole drilled underground
Configure to install.

A connecting portion 15 is attached to the rear of the portion l having the crushing fitting, and is connected to the cylindrical portion 10 by passing through the center of the truncated conical portion 11 to which the hard member is attached. This connecting part 15
If necessary, if it is constructed from flexible members, even if the old pipe is curved, the entire device can be constructed so that it can follow the curve of the old pipe.

The pipe replacement device of the present invention described above is used as follows.

Pass the traction wire 1 through the old pipe by guiding it with a piano wire, etc.
This pulls the spacer ball 2, guides the part l having the crushing fitting connected thereto into the old pipe, and opens and closes the crushing fitting with the hydraulic pump as described above to crush or crack the old pipe. The cutting part 1 connected by the connecting part 15 is introduced into this crushed or cracked old pipe, and the truncated conical part with ceramic embedded in the surface is rotated by a hydraulic motor via a swivel as described above. A hole corresponding to the outer diameter of the new pipe is drilled underground, and the new pipe 13 attached to the section 14 is newly installed underground.

Needless to say, the present invention is not limited to the above-mentioned embodiments, and the hard member is not limited to ceramic, but may also be made of highly hard steel or the like. It goes without saying that the power for rotation is not limited to the hydraulic pump, and other power may be used.

(Effects of the Invention) Since the present invention connects the part 1 having the crushing metal fittings and the cutting part integrally as described above, immediately after the part 1 having the crushing metal parts crushes the old pipe, the crushed old pipe is removed from the ground. The cut part is inserted before it collapses due to pressure, etc., and the step of guiding the cut part to the position where the old pipe was located can be omitted. Furthermore, since a new pipe is installed in connection with the cut section, the process of guiding the new pipe to the location where the old pipe was (a hole in the ground) can be omitted, and This means that new pipes can be installed underground before the location where the pipes were located (the hole in the ground) collapses.

Furthermore, by selecting the diameter of the cutting part, the diameter of the hole in the soil can be cut to match the outer diameter of the new pipe.

In the case of telephone line piping, several old pipes 16, 16', etc. are buried as shown in the conceptual side view in Fig. 3, and these are grouped by frames 17 at predetermined intervals. However, in such cases, when replacing the piping so as not to damage the frame 17 or adjacent piping,
Either operate only the cutting part without operating the part where the crushing fitting is attached, or do not operate the crushing fitting, or even if it does work, do not operate the hydraulic pump without causing cracks in the old piping. It can be operated selectively using hydraulic pressure.

Of course, it is also possible to operate the crushing metal greatly to crush even the adjacent old pipe and replace it with a single new pipe with a larger diameter.

[Brief explanation of the drawing]

Fig. 1 is a conceptual side view of a pipe replacement device that can implement the present invention, Fig. 2 is a partially cutaway side view of a part with a crushing fitting, and Fig. 3 shows a state in which several old pipes are grouped together by a frame. FIG. l... Part with crushing metal fittings 4...
Crushing fitting l...Cutting part 11...Truncated conical part of the cutting part 12...Hard member such as ceramic 14...New pipe installation is done in part

Claims (1)

[Claims] A part with a crushing fitting that opens and closes with mechanical force to crush or crack the old pipe, and a hard member such as ceramic is attached around it, and the area around which the hard member is attached is rotated by power to cut the old pipe. A piping replacement device that integrates three parts: a cutting part for installing new pipes, and a new pipe installation part for installing new pipes.