JPH0315292Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a device that repairs the inside of a pipeline by inverting a tube from the inverting machine side into a pipeline with many curved parts to repair the inside of the pipeline. It's about machines.

[Prior art] A method of lining a tube while inverting it from the inverting machine side into a conduit with many bends is known from Japanese Patent Application Laid-open No.
60-141527 is known.

This known example has a configuration in which the guide rod (elongated body 6) is pushed in and the tip guide member is rotated manually on the ground on the side of the reversing machine.

[Problems with the Prior Art] For this reason, in the above method, although it is a simple bend, when it comes to gas pipelines that have complex bends such as planar S-shapes and three-dimensional S-shapes, it is difficult for workers to manually Since the tip guide member is operated by relying on the feel of the tip, that is, intuition, there are problems in that considerable experience and skill are required and the working time is long.

The purpose of the present invention is to provide a pushing machine for smoothly inverting and advancing a tube by controlling a guide rod by automatic means in a device for lining a tube while inverting it into a pipeline with many curved parts. That's true.

[Means to solve the problem] The configuration of the present invention is as follows.

A pair of endless bit holding bands each having a semicircular groove oriented in the longitudinal direction in the center of opposing surfaces are hung so as to be freely movable around the oblong guide; The gripping belt is driven by a motor in the same direction at the same speed, and a sensor for detecting the reaction force received by the guide rod held in the recess of the gripping strap is attached to a part of the driving system of the gripping belt. A guide rod pushing machine in a tube reversing lining device, comprising: a controller that temporarily stops the drive applied to the gripping belt when the reaction force detected by the reaction force detection sensor exceeds a certain level. .

[Operation] The guide rod controlled by the device of the present invention has flexibility, and a slightly curved tip guide is attached to the tip of the guide rod, and a rotation (twisting) force is applied to this tip guide by a rotating machine. The direction of the leading end of the guide rod changes due to this rotation. Due to this change in direction, the guide rod guides the tube in the reverse direction at the bend in the conduit.

The guide rod that performs the above action is given a pushing force by the pushing machine of the present invention, and advances into the conduit together with the tube. This is possible because the guide rod is gripped by the grooves of the pair of grip bands, and the grip bands are driven by a motor. However, when the tip of the guide rod hits a bend in the pipe and cannot proceed any further, if further pushing force is applied to the guide rod, the tip guide is pressed strongly against the pipe wall, making it impossible to change direction. Additionally, if the tube is damaged at the tip, there is a risk of damaging the tip guide or sensor. In such a case, the reaction force detection sensor can detect the situation in which the guide rod cannot move forward, so if this reaction force detection sensor detects a certain amount of reaction force, the controller receives a signal from this sensor and Temporarily stop the drive system of the grip band.

As a result, the pushing force acting on the guide rod is once released, so if the rotary machine applies right or left rotation to the tip guide, the tip guide can freely change its direction. Therefore, by rotating the grip band in the traveling direction again, it becomes possible to push and guide the tube in the correct traveling direction.

[Example] FIG. 1 is an overall explanatory diagram of a tube reversal method and apparatus. L is the construction section lining the tube,
1 is the gas conduit, 2 is the bending part, 3 is the reversing machine,
An uninverted tube 4 is accommodated within this inverting machine 3.

5 is a guide rod, and at the tip of this guide rod 5,
As shown in FIG. 2, a slightly curved tip guide 6 follows, which is independent of the guide rod 5 and has a multi-strand wire 7 passing through the guide rod 5.
It is connected to the. As shown in FIG. 3, the guide rod 5 has a hollow cross-sectional structure in which a coil 5' is molded with resin 5''.

8 is a head attached to the tip of the tip guide 6, and this head 8 is equipped with a magnetic sensor 9 (a pressure sensor may also be used) and a tube retaining ring 1.
0 is attached. 11 indicates a signal line.

Reference numeral 12 denotes a pushing machine according to the present invention, and as shown in FIGS. 4 and 5, this pushing machine 12 connects a pair of endless gripping bands 12' with links connected by pins, respectively to elliptical guides. 12a through a bearing device 12b, and is driven by a drive motor (not shown).In the center of the opposing surface of the grip band 12', there is a semicircular shape parallel to its longitudinal direction (running method). Recessed grooves 12'' are respectively formed, and the guide rod 5 described above is held between these recessed grooves 12''.

13 is a reaction force detection sensor that detects the reaction force acting on the guide rod 5 acting on the grip band 12' from the drive system, and when this sensor detects a reaction force (load) exceeding a certain level, the drive The system is controlled to temporarily stop the rotation of the grip band 12'.

Reference numeral 14 denotes a rotating machine for the multi-strand wire 7 installed on the ground, a mechanism for rotating the multi-strand wire 7 by gripping it with a chuck, and a rotation control device 1 for controlling the rotation based on the signal from the magnetic sensor 9.
5 is included.

Reference numeral 16 denotes a frame on which the guide rod 5 is looped and pooled.

The lining method using the above device will be explained below.

a Pass the uninverted tube 4 through the retaining ring 10 attached to the head 8 of the tip guide 6, fix the tip of the uninverted tube 4 to the entrance of the construction zone L, and turn the inverting machine 3, pushing machine 12, and rotating machine 13 Set.

b Apply fluid pressure from the reversing machine 3 to the uninverted tube 4, and at the same time operate the pushing machine 12 (holding belt 1
2') to apply pushing force to the guide rod 5,
Lining is started while inverting the uninverted tube 4.

c When the reversal progresses and the tip guide 6 approaches the bending part 2, the tip guide 6 that has gone straight becomes the sixth
As shown in the figure, the guide rod 5 hits the pipe wall at the bent portion 2, and a reaction force is generated on the guide rod 5. This reaction force is detected by the reaction force detection sensor 13, so if this reaction force is greater than a certain level, the pushing operation of the pusher 12 is temporarily stopped.

d When the tip guide 6 hits the pipe wall at the bent portion 2 as shown in FIG. The rotating machine 14 applies rotation to the multi-strand wire 7 in response to a signal from the rotation control device 15. This rotation may be to the left or right, but when the tip guide 6 rotates, the head 8 of the tip guide 6 as shown in FIG.
is facing the direction of the pipe. When the head 8 faces toward the pipe, the magnetic sensor 9 no longer detects metal, its signal stops, and the rotating machine 14 stops rotating.

e When the rotating machine 14 stops and the tip guide 6 faces the pipe direction, the pushing machine 12 starts pushing again.

In this way, all the bends 2 are cleared.

f When the reversal reaches a predetermined length, the reversing machine 3 and the pushing machine 12 are stopped, and then the pushing machine 12 is operated in reverse to pull out the guide rod 5 from inside the pipe.

g After pulling out the guide rod 5, inject heated fluid inside to glue and dry the inverted tube. Next, after discharging the heated fluid, insert a cutter (for example, a heater-type cutter) and cut the tip of the tube. Open it to finish all inversion work.

[Effects of the present invention] As described above, in the present invention, in the guide rod pushing machine, the guide rod is gripped and pushed into the concave groove of the grip band, so that the long guide rod can be continuously pushed. Since it can be pushed in or pulled out, and the contact area between the bit holding band and the guide rod is wide, there is no fear of slipping, and pushing or pulling out can be carried out reliably. Further, the present invention detects the reaction force acting on the guide rod to temporarily stop the drive of the gripping band, so that the direction of the tip guide can be changed smoothly.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the tube inversion lining method and its device, Fig. 2 is a cross-sectional view of the guide rod and the tip guide;
Figure 3 is an enlarged cross-sectional view taken along the line A-A, Figure 4 is a plan view of the pushing machine, Figure 5 is an enlarged cross-sectional view taken along the line B-B, and Figures 6 and 7.
The figure is an explanatory diagram of the induction effect of the tube. DESCRIPTION OF SYMBOLS 1...Gas conduit, 2...Bent part, 3...Reversing machine, 4...Uninverted tube, 5...Guiding rod, 6...
...Tip guide, 7...Multi-strand wire, 8...Head, 9...Magnetic sensor, 10...Retaining ring,
11... Signal line, 12... Pusher, 12'... Bit holding band, 12a... Guide, 13... Reaction force detection sensor, 14... Rotating machine, 15... Rotation control device,
16... mount.

Claims (1)

[Claims for Utility Model Registration] A pair of endless gripping bands each having semicircular grooves oriented in the longitudinal direction in the center of opposing surfaces are movable against an oblong guide. The pair of gripping bands are driven by motors in the same direction and at the same speed, and the reaction force detection sensor received by the guide rod held in the recess of the gripping band is connected to the drive system of the gripping band. A tube reversal lining characterized by: being attached to a part of the tube reversing lining, and further comprising: a controller that temporarily stops the drive applied to the gripping belt when the reaction force detected by the reaction force detection sensor exceeds a certain level; Guide rod pusher in the device.