JPH0448091B2 - - 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 while inverting it using fluid pressure from the inverting machine side into a pipe line with many bends, 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 guide rod comprising a tip guide having a retaining ring attached to the tip and having an arcuate overall shape, and a guide rod comprising a tip guide rotatably attached to the tip and a wire connected to the tip guide inserted into the core. , a pipe direction detection sensor attached to the head of the tip guide, an insertion machine that applies a pushing force to the guide rod, and a reaction force detector that detects a reaction force acting on the guide rod; A reversing machine that reverses the tube using fluid pressure, and an insertion machine that pushes and inserts a guide rod into the conduit while guiding the tube when the tube is reversed, and a tip guide attached to the tip of the guide rod. When the pipe direction detection sensor detects that the pipe has hit the pipe wall, the rotating machine is driven to rotate the tip guide, and at the same time, the reaction force is detected by the reaction force detector to stop the insertion machine and prevent the bending. The rotating machine is stopped when the turning direction is detected using the signal from the direction detection sensor.
This device consists of a controller that re-drives the insertion machine, and a device that inverts the tube and lines it inside a conduit line with many bends.

[Function] At the stage where the tube is inverted while entering the pipe line, the motor of the insertion machine is driven to rotate the caterpillar, and the guide rod is pushed into the pipe line, and the uninverted tube passed through the tube retaining ring. Guide the tip of the When the pipe reaches a bend and the tip of the tip guide and the uninverted tube hit the pipe wall, the guide rod stops advancing and at the same time, a signal is output from, for example, a magnetic sensor as a pipe direction detection sensor. Ru. When the signal from the magnetic sensor is received, the controller drives the rotating machine to rotate the tip inductor. At the same time, when the tip guide hits the tube wall, a reaction force is generated on the guide rod, causing the assembly plate to retreat slightly, and this retreat is detected by the reaction force detector. As a result, the inserter stops. When the magnetic sensor points in the direction of the pipe due to the rotation of the tip guide, a change appears in the signal from the magnetic sensor, so it can be confirmed that the tip guide points in the direction of the pipe. After confirming this, the rotating machine is stopped, the insertion machine (motor) is restarted, and the guide rod is pushed in. In this way, each obstacle is overcome to reach the end of the conduit. All of the above actions are controlled by the controller.

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

As shown in FIG. 2, 5 is a guide rod having a structure in which a flexible tip guide 6 bent in an arc shape is attached to the tip and a wire 7 for rotating the tip guide 6 is housed inside the core. As shown in FIGS. 2 and 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 magnetic sensor 9 (a pressure sensor may be used) as a pipe direction detection sensor and a tube holding ring 10 are attached to the head 8. 11 is a lead wire for taking out a signal from the magnetic sensor 9.

In FIG. 1, 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 (chuck device) 13, as shown in FIGS. 13' is stretched between the sprockets 14 and 14', the guide rod 5 is gripped between the caterpillars 13 and 13', and the motor 18 drives the sprockets 14 and 14' to run (rotate) the caterpillars 13 and 13'. Then, the guide rod 5 is pushed into the pipe L.
In the figure, 15 is an assembly plate, and 16 is a hanging fitting that attaches the assembly plate 15 to the insertion machine frame 17.

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 for rotating the wire 7 extending rearward from the tip guide 6 through the inside of the guide rod 5, and 23 is a mount that holds the guide 5 in a loop shape.

24 is a controller which performs the following control.

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 Applying fluid pressure from the reversing machine 3 to the uninverted tube 4, and at the same time driving the insertion machine 12 to apply a pushing force to the guide rod 5, guiding the uninverted tube 4 by the insertion action of the guiding rod 5, and The inside of the pipe L is lined while being reversed by 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. 6, a signal is output from the magnetic sensor 9. , the rotary machine 22 rotates, and at the same time a reaction force is generated on the guide rod 5. This reaction force causes the assembly plate 15 to retreat slightly, and the reaction force detector 19 detects this retreat, and this signal is sent to the controller 24. is input. As a result, the insertion machine 12 stops and the pushing of the guide rod 5 stops.

d The rotating machine 22 may be rotated to the left or to the right, but when the tip guide 6 rotates, the head 8 of the tip guide 6 faces the pipe direction as shown in FIG. When the head 8 faces the pipe direction, a change occurs in the signal from the magnetic sensor 9, and when this change occurs, the rotation of the rotating machine 22 immediately stops.

e When the rotary machine 22 stops and the tip guide 6 faces the pipe direction, the insertion machine 12 is driven again and the insertion of the guide rod 5 starts.

In this way, all the bends 2 are cleared.

f When the reversal reaches the end of the pipe L, the reversing machine 3 and the inserting machine 12 are stopped, and then the inserting machine 12 is reversely driven to pull out the guide rod 5 from the pipe L.

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 attaches a tip guide with a pipe direction detection sensor to the tip side of a guide rod, and rotates the tip guide with an electric signal from the sensor to detect the bending direction of the pipe. Since I tried to clear the bends while identifying the bends, I had the experience of inverting the tube and lining it in a pipeline with many bends.
Regardless of skill level, this can be done automatically using mechanical power, and this automation can greatly shorten the working time.

[Brief explanation of drawings]

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, and FIGS. 6 and 7 are action explanatory views. 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
...Magnetic sensor, 10...Retaining ring, 11...
Lead wire, 12... Insertion machine, 13, 13'... Caterpillar, 14, 14'... Sprocket, 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 guide rod comprising a tip guide with a retaining ring attached to the tip and an arcuate overall shape, the tip guide rotatably attached to the tip, and a wire connected to the tip guide inserted into the core. a pipe direction detection sensor attached to the head of the tip guide; an inserter for applying a pushing force to the guide rod; and a reaction force detector for detecting a reaction force acting on the guide rod. ,
A reversing machine that reverses the tube using fluid pressure, and an insertion machine that pushes and inserts a guide rod into the conduit while guiding the tube when the tube is reversed, and a tip guide attached to the tip of the guide rod. When the pipe direction detection sensor detects that the pipe has hit the pipe wall, the rotating machine is driven to rotate the tip guide, and at the same time, the reaction force is detected by the reaction force detector to stop the insertion machine and prevent the bending. The rotating machine is stopped when the turning direction is detected using the signal from the direction detection sensor.
This device consists of a controller that re-drives the insertion machine, and a device that inverts the tube and lines it inside a conduit with many bends.