JPH08267351A - Piping inner cleaning device - Google Patents

Abstract

PURPOSE: To eliminate flux or the like stuck to the inner surface of a pipe's welding joint part and another flux or the like staying on a pipe bottom. CONSTITUTION: A driving truck 2 is stopped at a welding joint partin a pipe inner surface, and a polishing motor 13 of a polishing attachment 4 is driven, rotating a rotary disk 14. a tipping means 15 and a roller chain 19 of a buffing work means 16 are rotated as overhanging them by dint of centrifugal force by means of rotation in this rotary disk 14, and an inner surface flux or the like is separated as rapping intermittently an inner surface of the welding joint part with chipper 20, eliminating the flux or the like separated by a buff 23. After the flux or the like in the pipe innder surface is removed, a suction device 6 is driven as making the driving truck 2 move forward or backward, whereby the flux or the like stayed on a pipe bottom is eliminated by suction force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning device for removing foreign matters such as flux adhering to the inner surface of welded joints of various pipes such as gas pipes, water pipes and oil plants.

[0002]

2. Description of the Related Art In order to ensure safe operation of various pipes such as gas pipes, it is required to fully inspect welded joints joined by welding by X-ray nondestructive inspection. In order to accurately inspect this welded joint portion, it is necessary to remove the inner surface flux and the like attached during welding. It is not easy to remove the inner flux and the like. Conventionally, after welding, a hit is applied from the outer surface of the pipe to separate the inner flux and the like.

[0003]

Even if the inner surface flux and the like are peeled off by hitting the outer surface of the pipe as described above, it is difficult to completely remove the flux and the like adhering to the pipe body. Also, peeled flux remains below the pipe,
It was also difficult to remove this. Furthermore, in order to peel off the inner surface flux and the like, a strong impact must be applied to the pipe body, and there is a risk of adversely affecting the base material of the pipe body.

The present invention has been made in order to eliminate such disadvantages, and it is possible to reliably remove the flux and the like adhering to the inner surface of the welded joint portion, and also to remove the flux and the like staying at the pipe bottom. The purpose is to obtain a pipe cleaning device that can be used.

[0005]

A pipe cleaning device according to the present invention includes a drive carriage that travels along the inner surface of the pipe, a polishing device, a lighting device, a clamp device, and a suction device mounted on the drive carriage. The polishing apparatus has a polishing motor, a rotating disk, a chipping means, and a buffing means.
The rotary shaft is mounted on the tip of the drive carriage with the rotary shaft facing the forward direction of the drive carriage, and the rotary disk has two discs with a fixed interval attached to the rotary shaft of the polishing motor. Roller chain or belt rotatably mounted on a support shaft penetrating two discs at a plurality of equally divided locations on the outer periphery of the rotary disc, and mounted on the tip of the roller chain or belt. And a chipper, and the buffing means is a roller chain rotatably mounted on a support shaft penetrating the two disks at an intermediate position between the mounting positions of the chipping means on the outer peripheral portion of the rotary disk or Belt and roll ratchet
Or a buff attached to the tip of the belt,
The illuminating device is attached at a certain angle with respect to the traveling direction of the drive carriage, and has a laser irradiating means for irradiating a laser spot light to a position on the inner surface of the tube corresponding to the position of the rotating disk,
The clamp device has an electromagnetic suction means for fixing the drive carriage at the processing position, and the suction device has a suction nozzle attached to the lower end of the rear stage of the rotating disk, a storage part connected to the suction nozzle and a suction motor. It is characterized by

[0006]

In the present invention, after the pipes are welded and joined together, the drive carriage is run while the laser irradiation means of the illuminating device obliquely irradiates the laser spot light onto the inner surface of the pipe. The fact that the laser spot light hits the backside bead of the welded joint and is reflected backward is detected to detect that the drive carriage has reached the welded joint. When the drive carriage reaches the welded joint portion, the traveling is stopped, and the electromagnetic attraction means of the clamp device is excited to be attracted to the pipe body, and the drive carriage is fixed to the pipe body. After fixing the drive carriage, the polishing motor of the polishing apparatus is driven to rotate the rotating disk. Due to the centrifugal force caused by the rotation of the rotating disk, the roller chains or belts of the chipping means and the buffing means rotate while projecting in the direction orthogonal to the rotation axis of the rotating disk, and the chipper of the chipping means rotates the inner surface of the welded joint portion. The inner surface flux and the like are peeled off by intermittently hitting, and the flux and the like peeled off by the buff of the buffing means are removed. After removing the flux and the like on the inner surface of the pipe, the clamp device is released, and the suction device is driven while moving the drive carriage forward and backward to suck and remove the flux and the like accumulated on the bottom of the pipe.

[0007]

1 is a block diagram showing an embodiment of the present invention. As shown in the figure, the pipe cleaning device 1 has a drive carriage 2, a polishing device 3 mounted on the drive carriage 2, an illuminating device 4, a clamp device 5 and a suction device 6. The drive carriage 2 has a drive wheel 9 and a driven wheel 10 connected by a traveling motor 7 and a chain 8, and is supplied with electric power supplied from the outside through a control cable 11 or from a battery mounted therein. The pipe 12 is driven by the supplied electric power.

The polishing apparatus 3 has a polishing motor 13, a rotary disk 14, a chipping means 15 and a buffing means 16. The polishing motor 13 is mounted on the tip of the drive carriage 2 in the forward direction, and the rotary shaft is arranged so as to face the forward direction of the drive carriage 2. The rotating disk 14 has two disks 17a and 17b, which are spaced apart from each other, mounted on the rotating shaft of the polishing motor 13. As shown in the front view of the polishing apparatus of FIG. 2, the chipping means 15 is rotatably attached to a support shaft 18 penetrating two discs 17a and 17b at two locations on the outer periphery of the rotary disc 14 on the same diameter. The roller chain 19 and the chipper 20 made of high-speed tool steel or the like are attached to the tip of the roller chain 19. From the support shaft 18 to which this chain 19 is attached to the chipper 20
The length to the tip is formed to be slightly longer than the distance from the outer circumference of the rotating disk 14 to the inner surface of the tube 12. The buffing means 16 includes two sets of chipping means 1 on the outer peripheral portion of the rotating disk 14.
5, a roller chain 22 rotatably attached to a support shaft 21 penetrating the two disks 17a and 17b at an intermediate position between the mounting positions of 5, that is, a position orthogonal to the two sets of the chipping means 15, A buff 23 attached to the tip of the ratchet 22. The length from the support shaft 21 to the tip of the buff 23 is also measured from the outer circumference of the rotary disk 14 to the pipe 12
It is formed somewhat longer than the distance to the inner surface of the.

The illuminating device 4 has a laser oscillating section 24 and a laser irradiating section 25. The laser irradiating section 25 is mounted at a certain angle with respect to the traveling direction of the drive carriage 2 and is mounted on the rotary disk 1.
Laser spot light is applied to the inner surface of the tube 12 corresponding to the position 4 from the rear. The clamp device 5 has an electromagnetic attraction means 26 such as a magnet chuck attached to the lower portion of the drive carriage 2 and fixes the drive carriage 2 at the processing position. The suction device 6 has a suction nozzle 27 attached to the lower end of the rear stage of the rotary disk 14, and a storage unit 29 and a suction motor 30 which are connected to the suction nozzle 27 by a conduit 28. Suction nozzle 2
7. As shown in the perspective view of FIG. 3, a membrane 27b made of a flexible rubber and having a notch is attached in front of and behind the tip of the suction port 27a.

A pipe cleaning device 1 constructed as described above.
The operation of removing the flax and the like adhering to the inside of the welded joint portion of the pipe 12 joined by welding in 1. will be described with reference to the construction process diagram of FIG.

After the pipe 12 is welded and joined, FIG.
As shown in FIG.
The drive carriage 2 is run while irradiating the laser spot light A on the inner surface 2 obliquely forward. While the drive carriage 2 is running, the operator observes the reflected light of the laser spot light A on the inner surface of the tube 12 from the end of the tube 12 into which the drive carriage 2 is inserted. Before the drive carriage 2 reaches the welded joint portion of the pipe 12, the laser spot light A emitted from the laser irradiation unit 25 to the inner surface of the pipe 12 is as shown in FIG.
The light is reflected by the inner surface of the flat tube 12 and heads forward in the traveling direction of the drive carriage 2. Therefore, the operator cannot see the reflected light and can confirm that the drive carriage 2 is traveling on a flat portion.

When the drive carriage 2 reaches the vicinity of the welded joint, as shown in FIG. 4B, the laser spot light A emitted from the laser irradiation unit 25 hits the backside bead 30 of the welded joint. The reflected light goes to the side opposite to the traveling direction of the drive carriage 2. When the operator confirms the reflected light from the backside bead 30, the operator recognizes that the drive carriage 2 has reached the position of the weld joint. Therefore, the traveling of the drive carriage 2 is stopped, the electromagnetic suction means 26 of the clamp device 5 is excited, and the electromagnetic suction means 26 is attracted to the pipe 12 to fix the drive carriage 2 to the pipe body.

After the drive carriage 2 is fixed, the polishing motor 13 of the polishing apparatus 3 is driven to rotate the rotary disk 14 as shown in FIG. 4 (c). Since the drive carriage 2 is fixed to the pipe body when the rotary disk 14 is rotated in this manner, the rotary disk 14 can be stably rotated. When the rotary disk 14 rotates, the chipping means 15 rotatably supported on the rotary disk 14 and the roller chains 19 and 22 of the buffing means 16 are centrifugally oriented in a direction orthogonal to the rotary axis of the rotary disk 14. It overhangs and rotates. Chippers attached to the overhanging roller chains 19 and 22
Since the tip portion of 20 and the tip portion of the buff 23 are located at a position longer than the distance from the rotation axis of the rotary disk 14 to the inner surface of the tube 12, even if the rotation axis of the rotary disk 14 is displaced from the axis of the tube 12, Insert the tip of the tipper 20 and the tip of the buff 23 into the tube 1
Can be applied to the inner surface of 2.

By rotating the chipping means 16 in this manner, the tip of the chipper 20 moves while hitting the vicinity of the welded joint and the surface of the back bead 30 to separate the inner surface flux and the like. When the chipper 20 rotating at high speed hits the uneven bead 30 having irregularities, the unevenness of the irregular bead 30 causes hitting and repulsion to be repeated intermittently. By repeating this, the unevenness of the back bead 30 can be processed flat. Further, the buff 23 of the buffing means 16 rotating at the same time as the chipping means 15 removes the peeled flux and the processing wastes of the back bead 30.

After removing the inner surface flux of the welded joint portion by the polishing device 3, the fixing by the clamp device 5 is released, and the suction device 6 is driven while moving the drive carriage 2 forward and backward in the vicinity of the welded joint portion. When the suction device 6 is driven, the flux or the like that has been peeled off and stayed at the bottom of the pipe 12 is sucked from the suction nozzle 27 and collected in the storage unit 29, and the flux that has been peeled and stagnant is removed. After sucking and removing this flux and the like, the drive carriage 2 is retracted to move the pipe 1
Pull out from the end of No. 2, arrange the next pipe, join by welding, and repeat the above removal work.

In the above embodiment, the chipper 20 of the chipping means 15, the buff 23 of the buffing means 16 and the rotary disk 14 are connected by the roller chains 19 and 22. Even if a belt made of a synthetic resin such as a vinyl chloride resin, a polyethylene resin, or a polyamide resin is used, the chipper 20 or the buff 23 is orthogonal to the rotation axis of the rotary disk 14 when the rotary disk 14 is rotated. It can be projected and rotated in the direction.

In the above embodiment, the chipper 20 and the buff 2 are used.
The case where the removal of the inner surface flux and the like by 3 is performed at one place where the drive carriage 2 is stopped has been described, but when the work of removing the flux and the like is repeated while fixing and releasing the drive carriage 2 little by little, welding is performed. A wide range of foreign matters and the like near the joint can be removed.

[0018]

As described above, according to the present invention, after the pipes are welded and joined to each other, the driving carriage is installed while irradiating the laser spot light obliquely forward from the laser irradiation means of the illumination device to the inner surface of the pipe. Since the vehicle travels, the reflected light can be sent out backward when the laser spot light hits the backside bead of the welded joint, and it is possible to accurately detect that the drive carriage has reached the welded joint. be able to.

Further, when the drive carriage reaches the welded joint and rotates the rotary disk of the polishing apparatus, the drive carriage is fixed to the pipe body by being attracted to the pipe body by the electromagnetic suction means of the clamp device. The rotating disk can be rotated stably.

Further, the tipper and the buff of the polishing device are closed.
Since it is connected to the rotating disk with a ratchet or a wide belt, it is possible to rotate the rotating disk while projecting the chipper or buff in the direction orthogonal to the axis of rotation of the rotating disk. The tip portion of the buff can be accurately applied to the inner surface of the welded joint portion, and the inner surface flux and the like can be efficiently separated and removed.

Further, since the chipper is held by a roller chain or a wide belt, the chipper rotates at a high speed.
When hitting an uneven back bead, the impact and repulsion are repeated intermittently, and the back bead surface can be processed flat.

Further, since the flux or the like that has peeled off and stayed on the bottom of the tube is sucked and removed by the suction device, foreign matters such as flux can be completely removed from the inside of the tube. Therefore, the inspection accuracy of the nondestructive inspection of the welded joint can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a front view of the polishing apparatus of the above embodiment.

FIG. 3 is a perspective view showing a suction nozzle of the suction device of the above embodiment.

FIG. 4 is a construction process diagram showing the operation of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 pipe cleaning device 2 drive carriage 3 polishing device 4 lighting device 5 clamping device 6 suction device 13 polishing motor 14 rotating disk 15 chipping means 16 buffing means 19 rolla chain 20 chipper 22 rolla ratchet 23 buff 25 laser irradiation unit

Claims (1)

[Claims] 1. A drive cart that runs along the inner surface of the pipe, a polishing apparatus, a lighting apparatus, a clamp apparatus, and a suction apparatus mounted on the drive cart. The polishing apparatus includes a polishing motor, a rotary disk, and a polishing machine. It has a chipping means and a buffing means, and the polishing motor is mounted on the tip of the drive carriage with the rotation axis facing the forward direction of the drive carriage, and the rotary disk is composed of two discs with a certain interval. A roller chain or belt mounted on the rotary shaft of the polishing motor, and the chipping means rotatably mounted on a support shaft penetrating two discs at a plurality of equally divided positions on the outer periphery of the rotary disc. And a chipper attached to the front end of the roller chain or the belt, and the buffing means penetrates the two disks at a position intermediate between the mounting positions of the tipping means on the outer peripheral part of the rotating disk. The rotatably mounted on the support shaft It has a ratchet or belt and a buff attached to the front end of the roller chain or belt, and the lighting device is attached at a certain angle with respect to the traveling direction of the drive carriage, and the position of the rotating disk is It has laser irradiation means for irradiating the laser spot light to the corresponding position on the inner surface of the pipe, the clamp device has electromagnetic suction means for fixing the drive carriage at the processing position, and the suction device is the latter stage of the rotating disk. An in-pipe cleaning device comprising a suction nozzle attached to a lower end, a storage unit connected to the suction nozzle, and a suction motor.