JPH083351B2 - Method for perforating branch pipe opening after pipe lining and water stopcock used therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an opening of a branch pipe after lining an aged sewer pipe, water pipe, gas pipe, etc. piped underground or in a building with a new pipe. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforation method for perforating water and a water stopcock used therefor.

(Prior Art) Recently, for example, a lining construction method called a rehabilitation pipe construction method is used to regenerate an old sewer pipe and lay a new pipe.

This rehabilitation pipe construction method is a method in which a synthetic resin strip is wound in a spiral shape to form a renewal pipe into an existing pipe and lining it, and a backing agent is injected into the gap between the renewal pipe and the existing pipe. When such a rehabilitating pipe construction method is adopted for an existing pipe having an attachment pipe (branch pipe), a through hole for a branch pipe must be drilled after injecting the backing agent.

Conventionally, when the existing pipe is made of a magnetic material such as iron, a method has been proposed in which a magnetic sensor is used to detect the opening of the branch pipe and a through hole for the branch pipe is drilled from within the renewal pipe. (See, for example, JP-A-56-127420).

(Problems to be Solved by the Invention) However, if the existing pipe is made of a non-magnetic material made of a concrete material such as a so-called fume pipe, the above-described drilling method using the magnetic sensor cannot be applied.

On the other hand, it is possible to insert a perforator into the branch pipe and perform perforation from the branch pipe side, but in the construction of the sewer rehabilitation pipe, it may be difficult to insert the perforator depending on the piping condition of the branch pipe. .

(Means for Solving the Problem) A method of punching a branch pipe opening after pipe lining according to the present invention vibrates by an excitation signal that is composed of an antenna coil and a resonator and that excites the resonator, and the excitation signal. After stopping, the position-stopping marker that emits the resonance signal remaining in the resonator from the antenna coil is placed at a position substantially concentric with the branch pipe axis before the lining. After inserting into the branch pipe opening and after lining, an antenna carriage for detecting the resonance signal is run inside the main pipe to detect the position of the position detection marker, and the piercing means is aimed at the position of the marker. It drives and perforates the said branch pipe opening part from the main pipe side.

In the case where the antenna carriage running in the main pipe has a function not only as a transmitting antenna that sends an excitation signal to the marker resonator but also as a receiving antenna that receives a resonance signal based on the resonance vibration of the resonator. Others,
When the excitation means of the resonator is provided on the marker side,
The antenna carriage need only have a function as a receiving antenna.

Further, the water stopcock of the present invention is, in the water stopcock inserted into the branch pipe opening portion, composed of an antenna coil and a resonator, vibrates by an excitation signal for exciting the resonator, and stops the excitation signal. After that, a position detecting marker for emitting a resonance signal remaining in the resonator from the antenna coil is arranged at a position substantially concentric with the branch pipe axis.

(Operation) A case will be described in which the antenna carriage functions not only for transmission but also for reception. That is, when the antenna carriage is run inside the main pipe after lining and the excitation signal is transmitted, the resonator of the position detection marker provided in the water stopcock inserted into the branch pipe opening before lining vibrates. Since the resonance signal of the resonator is transmitted from the antenna, the antenna carriage receives the resonance signal and detects, for example, the maximum position of the signal level of the resonance signal as the position of the position detection marker. Then, targeting this marker position, the perforation means is driven to perforate the branch pipe opening from the main pipe side.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

In the perforation method of the present invention, a step of inserting the water stopcock 1 in which the position detecting marker 14 is arranged in the opening of the branch pipe A before the lining, and a step of newly lining the inner peripheral surface of the existing pipe 2 Then, the step of detecting the marker position after lining and punching the branch pipe opening from the main pipe B side is included.

First, the step of inserting the water stopcock 1 will be described with reference to FIG.

In FIG. 1, a water stop cock setting robot 3 used in this inserting step has a robot main body 4 equipped with an automatic traveling means, and a drive unit 5 rotatable about a horizontal axis as a central axis. It is a thing. The drive unit 5 is provided with a cylinder 6, and the cylinder head 7 of the cylinder 6 can press the inner peripheral surface of the existing pipe 2 in the radial direction at the position where the rotation of the drive unit 5 is stopped. Is.

As shown in the enlarged view of FIG. 2, the water stopcock 1 is made of a foam material such as styrene and urethane, and in this example, it is a disc-shaped stopper having the same shape as the inner peripheral shape of the branch pipe A. The water main body 8, a leg piece 9 hanging down from the periphery of the water stop main body 8, and a collar portion 10 formed at the tip of the leg piece 9 have a hat shape. Here, the recess 11 surrounded by the leg pieces 9 is a portion into which the cylinder head 7 is inserted.

Since the water stopcock 1 used in the present invention is perforated and destroyed together with the renewal pipe 16, an inexpensive one made of a solid foam having closed cells is preferable. It may be a hollow, solid or arm-shaped one made of non-foaming resin.

A position detecting marker at a central portion of the water stop main body 8 at a position substantially concentric with the pipe axis of the branch pipe A when the water stop main body 8 is inserted into the opening of the branch pipe A. 14 is embedded. The position detecting marker 14 is composed of an antenna coil and a resonator. As the resonator, for example, a piezoelectric vibrating body such as a crystal oscillator is used. As described above, when the piezoelectric vibrating body is used as the resonator, a large amount of energy is accumulated in the vibrating body, so that the resonance signal with respect to the excitation signal can be large, and the number of turns of the antenna coil can be several at most. Therefore, the marker 14 itself can be downsized. In addition, the position detection marker 14
May be composed of a general LC resonance circuit. By the way, the position detecting marker 14 as described above does not necessarily have to be embedded in the central portion of the water blocking main body 8, and if it is in a position substantially concentric with the pipe axis of the branch pipe A, It may be attached to the head or bottom of the water body 8.

Further, in this example, the water stop cock setting robot 3 is connected to the television camera car 15 through the index wire 3a,
The image of the opening of the branch pipe A is taken by the TV camera car 15 and sent to the ground. Then, the operator on the ground controls the traveling drive of the water stop cock setting robot 3 and the drive of the cylinder 6 while checking this image.

Then, the recess 11 of the water stopcock 1 is fitted into the cylinder head 7 of the water stopcock setting robot 3, and a television camera vehicle is installed.
The inside of the existing pipe 2 before lining is run with 15 and the opening of the branch pipe A is photographed by the TV camera car 15. The worker
The opening of the branch pipe A is detected based on the image taken by the television camera car 15. The drive unit 5 of the water stop cock setting robot 3 is moved to the detection position of this opening, and the cylinder head 7 is moved.
Is extended by the operation of the cylinder 6 to set the water stopcock 1. At this time, since the opening of the branch pipe A may not be located at the top of the pipe, the drive unit 5 is run while appropriately turning the drive unit remotely. The water stopcock 1 may be hung by a rope or the like from the side of the branch pipe A and inserted, and in this case, the water stopcock 1
Needs to be an expandable type, and after reaching the predetermined position of the water stopcock 1 in a reduced diameter state, a fluid such as air is fed to expand the diameter, or the water stop main body 8 is configured. It is necessary to expand the diameter by pouring water into the water-swellable resin.

FIG. 3 shows a state after lining by the rehabilitation pipe construction method. That is, 16 is a renewal pipe and 17 is an existing pipe 2.
It is a backing agent composed of mortar or the like injected between the renewal tube 16 and the renewal tube 16. When this rehabilitation pipe construction method is used, the branch pipe A
Since the backing agent 17 is injected into the gap between the openings of the branching agent and the backing agent 17 pushes up the water stopcock 1 to the side of the branch pipe A, the water stopcock 1 tightly seals the opening of the branch pipe A. Therefore, water leakage is prevented, and the backing agent 17 does not leak to the side of the branch pipe A.

FIG. 4 is a diagram for explaining the process of detecting the position of the marker 14 and piercing the opening of the branch pipe A after lining. Position detection / drilling robot used in this process 18
Like the robot 3 for setting the water stopcock, is composed of a robot main body 19 equipped with automatic traveling means and a drive unit 20. The drive unit 20 includes a rotary head 22, an antenna 23 is attached to one end of the rotary head 22, and a perforated cutter 24 made of a cone-shaped super steel blade is attached to the other end. The antenna 23 is appropriately switched between a transmission mode and a reception mode at a set cycle, and at this time, it is connected to a signal processing circuit (not shown) corresponding to each mode. The TV camera car 21a is for monitoring the drilling process, and the measuring device 21b arranged on the ground is for displaying the reception characteristics of the antenna 23 in a graph. The punch cutter 24 may be another punch device such as a water jet device.

Then, in the transmission mode, the antenna 23 transmits an excitation signal for exciting the resonator forming the position-finding marker 14, and the antenna 23 moves along with the movement of the position-finding / drilling robot 18. To do. Then, when the antenna 23 approaches the mounting position of the position detection marker 14 (the insertion position of the water stopcock 1), the resonator of the position detection marker 14 vibrates at a constant resonance frequency and corresponds to this vibration level. The generated resonance signal is transmitted from the antenna coil. At this time, while the antenna 23 is switched to the reception mode,
The rotary head 22 is operated to rotate the drive unit 20,
The position where the reception level of 23 is maximum is detected, and the operation of the rotary head 22 is temporarily stopped at this position. After that, the rotary head 22 is rotated 180 degrees to direct the punching cutter 24 to the position where the reception level is maximum, that is, the position detecting marker 14 is present (see FIG. 6). Then, punching is started (see FIG. 5). During this perforation step, the water stopcock 1 is destroyed and poured into the renewal pipe 16. In FIG. 6, reference numerals 26 and 27 indicate supporting feet for supporting the rotary head 22 in the renewal pipe 16.

FIG. 7 shows another embodiment of the water stopcock 1, in which a cylindrical projecting portion 29 having a small diameter is formed in the upper central portion of a cylindrical waterstop body 28, and this projecting portion 29 is used for position detection. The antenna coil of the marker 30 is inserted. Further, in this case, the inner wall surface of the branch pipe A is enhanced in water blocking effect by the water blocking ring 31 provided on the outer circumferential surface of the water blocking plug body 28 at intervals in the height direction. In addition to this, the water stop cock body 28 may be formed of a bellows body.

In addition, in this example, the case of the rehabilitation pipe construction method is exemplified as the lining method, but the present invention is not limited to this, and the manhole
Also applied to the so-called reversal method (for example, Japanese Patent Laid-Open No. 55-15852), which is a lining method in which the opening of 32 is further excavated and the new pipe is directly lowered into the ground, and the new pipe is sequentially fed laterally. it can. Further, the positional relationship between the antenna 23 attached to the position detection / drilling robot 18 and the hole cutter 24 is not limited to the above-described embodiment, and may be provided separately before and after the position detection / drilling robot 18,
Further, it may be composed of two robots, a position detecting robot and a punching robot.

(Effect of the Invention) As described above, according to the method of the present invention, the opening of the branch pipe after lining can be accurately detected and drilled from the main pipe side. Further, by using the water stopcock of the present invention, the opening of the branch pipe can be accurately detected from the main pipe side by using it together with the antenna carriage.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an existing pipe showing a robot or the like used in the step of setting a water stopcock in the method for boring a branch pipe opening after pipe lining according to the present invention, and FIG. Fig. 3 is a sectional view showing the state, Fig. 3 is a sectional view of the inside of the pipe showing the state after lining, Fig. 4 is a sectional view of the inside of the pipe showing a robot or the like used for detecting and perforating the opening of the branch pipe, and Fig. 5 is FIG. 6 is a sectional view of the inside of the pipe showing the state at the time of perforation, FIG. 6 is a sectional view of the inside of the pipe showing the state immediately before the start of perforation, and FIG. 7 is a sectional view showing another embodiment of the water stopcock. A ... Branch pipe, B ... Main pipe 1 ... Water stopcock, 2 ... Existing pipe 3 ... Waterstop set robot 14 ... Position detection marker, 16 ... Update pipe 17 ... Backfill Agent 18 …… Robot for position detection / drilling 23 …… Antenna, 24 …… Drilling cutter

Claims (2)

[Claims] 1. A method of piercing an opening of the branch pipe closed by the lining from the main pipe side when lining the inside of the main pipe having a branch pipe to rehabilitate the main pipe, the antenna coil A position detecting marker that is excited by an excitation signal that is composed of a resonator and a resonator and that emits a resonance signal remaining in the resonator from the antenna coil after the excitation signal is stopped. Insert a water stopcock located approximately concentrically with the branch pipe axis into the branch pipe opening before lining, and after lining, run an antenna truck that detects the resonance signal inside the main pipe. And detecting the position of the position-detecting marker, and driving the perforating means with the position of the marker as a target to perforate the branch pipe opening from the main pipe side. How to drill an opening . 2. A water stopcock inserted into a branch pipe opening,
A position detection marker that is composed of an antenna coil and a resonator and that is excited by an excitation signal that excites the resonator, and that emits the resonance signal remaining in the resonator from the antenna coil after the excitation signal is stopped. Is provided at a position substantially concentric with the branch pipe axis.