JPH0448092B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method of lining a tube from the inversion machine side into a pipe line with many bends while inverting it using fluid pressure. .

[Prior Art] As a method of lining a tube from the inverting machine side into a conduit having many bends while inverting it using fluid pressure, there is a method disclosed in Japanese Patent Application Laid-open No. 141527/1983.

[Problems with the Prior Art] However, in the case of this known example, the pushing of the guide rod (elongated body 6) and the rotation of the tip guide member are manually performed on the ground on the side of the reversing machine. In the case of simple bends,
Gas pipelines with complex curves such as planar S-shapes and three-dimensional S-shapes rely on the intuition of workers, which requires considerable experience and skill and requires long working hours. There is a problem with becoming.

The purpose of the present invention is to solve the problems seen in the above-mentioned known examples in a method of lining a pipe line with many curved parts while inverting a tube using fluid pressure. The goal is to avoid being dependent on it.

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

A curved tip guide with a retaining ring for a non-inverted tube attached to the tip is rotatably attached to the tip of a guide rod, and the tip guide is rotated from the ground using a wire passed through the guide rod to open the pipe. In the tube inversion lining method, which guides the uninverted tube by pointing the tip guide in the bending direction and pushing the guide rod from the ground into the pipe to guide the uninverted tube, the amount of advance of the guide rod is measured with a push gauge. Detects the reaction force of the guide rod that is applied when the pin stops, and stops pushing.
Furthermore, the amount of push of the guide rod when it stopped was measured using a push gauge, and then rotation was applied to the tip guide, and this rotation caused the tip guide to turn in the bending direction, and the release of the reaction force caused the guide rod to enter a small amount. A method in which the rotation is stopped when measured with the indentation gauge, and the pushing is started again to line the inside of the pipe line, which has many bends, while inverting the tube using fluid pressure.

[Example] FIG. 1 shows an example of the present invention. L is a pipe line to be lined, 1 is a gas pipe, 2 is a bent part, 3 is a reversing machine, and inside this reversing machine 3 is an uninverted tube 4.
is accommodated.

As shown in FIG. 2, 5 has a configuration in which a flexible tip guide 6 with an arc-shaped bend is attached to the tip, and a multi-strand wire 7 for rotating the tip guide 6 is housed inside the core. As a guide rod,
As shown in FIG. 3, the guide rod 5 has a cross-sectional structure in which a coil 5' is molded with resin 5'', and has elasticity.

Reference numeral 8 denotes a head attached to the tip of the tip guide 5, and a tube retaining ring 10 is attached to the head 8.

12 is an insertion machine for the guide rod 5 installed on the ground, and this insertion machine 12 has a pair of track-shaped caterpillars 13, 1 as shown in FIGS.
3' between the sprockets 14 and 14', and grip the guide rod 5 between the caterpillars 13 and 13'.
By driving the sprockets 14, 14' with the motor 18, the caterpillars 13, 13' travel (rotate) and the guide rod 5 is pushed into the conduit L. In the figure, 15 is an assembly plate, 1
Reference numeral 6 denotes a hanging fitting that attaches the assembly plate 15 to the insertion machine frame 17.

Further, as shown in FIGS. 5 and 6, this insertion machine 12 is equipped with a push gauge 9 attached to the shaft 14a of the sprocket 14'.
The gauge 9 rotates together with the rotation of the guide rod 4a, and the amount of rotation, that is, the amount of pushing of the guide rod 5 can be read from the reference point 11.

19 is a reaction force detector (load cell) fixed to the insertion machine frame 17, and this detection head 20 is a metal fitting 21 attached to the assembly plate 15.
is in contact with

22 is a rotating machine that rotates the tip guide 6 via the wire 7 extending through the guide rod 5;
Reference numeral 3 denotes a pedestal that holds the dielectric 5 in a loop shape.

A controller 24 performs the following control.

At the stage when the tube enters the pipe L while being reversed, the motor 19 of the insertion machine 12 is driven to rotate the caterpillars 13 and 13', and the guide rod 5 is pushed into the pipe L so that it is not reversed. Guide the tip of tube 4. Then, the bent part 2 of the pipe L
When the tip of the tip guide 6 and the uninverted tube 4 hit the tube wall as shown in FIG.
Further pushing is no longer possible, and a reaction force acts on the caterpillars 13, 13', and this reaction force causes the assembly plate 15 to retreat. As a result, the reaction force is detected by the reaction force detector 19, and the motor 18 of the insertion machine 12 is stopped to stop the movement of the caterpillars 13, 13'. Next, the rotating machine 23 is driven to rotate the tip guide 6 with the wire 7. As a result of this rotation, when the tip guide member 6 faces the direction of the pipe, the presser foot is removed, and the guide rod 5 enters a small amount due to the release of the reaction force. If this intrusion occurs, it will appear on the push gauge 9, so the rotating machine 23 will be stopped and the inserting machine 1 will be moved again.
2 (motor 18) is started, and insertion of the guide rod 5 is started. In this way, the end of the conduit L is reached each time, overcoming obstacles.

The lining method using the above device will be explained in more detail.

a Fix the tip of the uninverted tube 4 to the entrance of the pipe L, pass the uninverted tube 4 through the retaining ring 10 attached to the head 8 of the tip guide 6, and connect the inverting machine 3, insertion machine 12, and rotating machine 22. Set.

b At the same time as fluid pressure is applied from the reversing machine 3 to the uninverted tube 4, the insertion machine 12 is operated to apply a pushing force to the guide rod 5, and the uninverted tube 4 is guided by the insertion action of the guide rod 5, and the fluid is Line the inside of the pipe L while inverting it under pressure.

c As the reversal progresses, the tip guide 6 approaches the bend 2, and when the tip guide 6 that has moved straight hits the pipe wall at the bend 2 as shown in FIG. 7, a reaction force is generated on the guide rod 5. Since this reaction force slightly pushes the assembly plate 15, this movement is detected by the metal fitting 21 and the reaction force detector 19, and the insertion machine 12 temporarily stops.

d When the insertion machine 12 stops operating, the rotating machine 2
2 is driven, and the wire 7 is rotated. As a result, the tip guide 6 rotates. This rotation is
It doesn't matter whether it is left or right, but when the tip guide 6 rotates, the tip guide 6 rotates as shown in FIG.
The direction of the head 8 of the pipe is directed toward the pipe line. When the head 8 faces the direction of the pipe, the accumulated reaction force is released and the guide rod 5 enters a small amount, and this situation can be detected by the push gauge 9, and if this movement occurs, the rotating machine 22 is stopped.

e When the rotating machine 22 stops and the tip guide member 6 faces the pipe direction, the inserter 12 is driven again and starts pushing the guide rod 5.

In this way, all the bends 2 are cleared.

f When the reversal reaches the terminal, the reversing machine 3 and the inserting machine 12 are stopped, and then the inserting 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 heating fluid into the tube to glue and dry the inverted tube, then after discharging the heating fluid, insert a cutter (for example, a heater type cutter),
The tip of the tube is opened by fusing and all inversion work is completed.

[Effects of the present invention] As described above, the present invention is capable of stopping the pushing of the guide rod while detecting the reaction force acting on the guide rod, and detecting the bending direction of the conduit by rotating the tip guide and moving the bending part. This automation allows anyone, regardless of their experience or level of skill, to automatically line the tube while inverting it in a conduit with many curved parts. The time can be drastically reduced.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, Fig. 2 is a sectional view of the guide rod and the tip guide, Fig. 3 is a sectional view taken along line A-A, Fig. 4 is a plan view of the insertion machine, and Fig. 5 6 is a side view showing the insertion machine and the reaction force detector, FIG. 6 is an explanatory diagram of the gauge, and FIGS. 7 and 8 are explanatory diagrams of the operation. DESCRIPTION OF SYMBOLS 1...Gas conduit, 2...Bent part, 3...Reversing machine, 4...Uninverted tube, 5...Guiding rod, 6...
...Tip guide, 7...Wire, 8...Head, 9
... Gauge, 10 ... Retaining ring, 11 ... Reference point, 12 ... Insertion machine, 13, 13' ... Caterpillar, 14, 14' ... Sprocket, 14a ...
Shaft, 15... Assembly plate, 16... Hanging fitting, 17... Insertion machine frame, 18... Motor, 19...
... Reaction force detector, 20 ... Detection head, 21 ... Metal fitting, 22 ... Rotating machine, 23 ... Frame, 24 ... Controller.

Claims (1)

[Claims] 1. A curved tip guide with a retaining ring for a non-inverted tube attached to the tip is rotatably attached to the tip of a guide rod, and the tip guide is rotated from the ground using a wire passed through the guide rod to open the pipe. In the cube inversion lining method, in which the tip guide is directed in the bending direction of The reaction force of the guide rod that acts when the approach is stopped is detected and the push is stopped, and the amount of push of the guide rod at this stop is measured with a push gauge.Then, the tip guide is rotated and this rotation is measured. When the tip guide is turned in the bending direction and the push gauge measures that the guide rod has entered a small amount due to the release of the reaction force, the rotation is stopped and pushing is started again to increase the fluid pressure in the pipe line, which has many bends. How to line the tube while inverting it using the