JP2006283846A - Method of performing pipe inside operation and launcher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an occupied area on a road surface when an operation in a pipe is performed. <P>SOLUTION: A pit 2 from which the straight pipe portion of a buried pipe A is exposed is formed in a road surface 3, and a part of the straight pipe portion thereof in the pit is cut off. A pair of pipe cut end parts 5a and 5b facing each other are opened to the inside of the pit, a pipe inside operation device 1 is inserted into the buried pipe from one of the pipe cut end parts, and the pipe inside operation is performed by using the pipe inside operation device. A launcher 13 having a placement surface 13a for placing the pipe inside operation device thereon is disposed between both pipe portions 6a and 6b in which the pair of pipe cut end parts are formed so that the pipe inside operation device can be moved continuously over the inside of the both pipe portions through the upper part of the placement surface. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, a pit in which a straight pipe portion of an embedded pipe is exposed is formed on a road surface, a part of the straight pipe portion in the pit is cut off, and a pair of pipe cutting end portions facing each other are formed in the pit. An in-pipe work device that is inserted into the buried pipe from one of the pipe cutting ends, and the in-pipe work is performed using the in-pipe work device, and a launcher used for the implementation method. About.

For example, in a buried pipe for city gas supply, when the buried pipe is repaired by welding from the inner surface of the pipe, a pit where the straight pipe portion of the buried pipe is exposed is formed on the road surface, and the straight pipe portion in the pit is formed. A part of the pipe cutting ends are opened in the pits, and an in-pipe traveling robot for polishing or an in-pipe traveling robot for welding that polishes the inner surface of the pipe from one of the pipe cutting ends. In-pipe work devices such as these are inserted into buried pipes, and in-pipe work such as polishing and welding is carried out using these in-pipe work devices.
In carrying out such in-pipe work, the work by the in-pipe work device is appropriately interrupted, and the in-pipe work device in the buried pipe is moved to the outside of the pipe. It is necessary to perform maintenance work such as replenishment of wires as needed.
Therefore, conventionally, a launcher having a placement surface on which the in-pipe work device can be placed is installed on the road surface near the pit, and the in-pipe work device can travel and move in series across the launcher and the buried pipe. The launcher is connected to the cutting end of the pipe with a guide pipe, the in-pipe work device in the buried pipe is moved to the launcher on the ground side through the guide pipe, and maintenance is performed on the in-pipe work device placed on the placement surface. When the work is performed and the maintenance work is completed, the in-pipe work device is moved from the launcher through the guide pipe into the buried pipe (this is a well-known conventional technique and information on prior art documents cannot be disclosed).

For this reason, it is necessary to secure the space for installing the launcher and guide pipe on the road surface near the pit until the pipe work is completed. There are disadvantages that tend to cause traffic restrictions such as traffic congestion and traffic obstacles such as traffic jams.
In addition, when working over a long period of time, work equipment such as in-pipe work devices, launchers, guide pipes, etc., at night, when in-pipe work is not performed, in order to be able to alleviate traffic obstacles. May be removed from the site, and the pits may be temporarily closed and temporarily restored to a state where the road surface can be passed. In this case, the work equipment will be carried out when the work is completed, or when the work is resumed. There is a drawback that it takes time to re-install the equipment, and the original work time is shortened due to the carry-out work and the re-installation work, so that the in-pipe work cannot be performed efficiently.
The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to reduce the exclusive area of the road surface when performing in-pipe work.

  A first characteristic configuration of the present invention is a pair of pipe cutting ends facing each other by forming a pit in which a straight pipe portion of an embedded pipe is exposed on a road surface, cutting off a part of the straight pipe portion in the pit. An in-pipe operation method in which a part is opened in the pit, an in-pipe work device is inserted into the buried pipe from one of the tube cutting ends, and the in-pipe work is performed using the in-pipe work device, A launcher having a placement surface on which the in-pipe work device can be placed is placed between both pipe portions forming the pair of pipe cut ends, and the in-pipe work device passes over the placement surface. Thus, the two pipe portions are installed so that they can move in series over the pipes.

[Action and effect]
A launcher having a mounting surface on which the in-pipe work device can be placed is placed between both pipe portions forming a pair of pipe cutting end portions. Since it is installed so that it can move in series over the pipes of the part, the in-pipe work device in the buried pipe is moved to the placement surface of the launcher installed between both pipe parts in the pit, and the placement surface If the maintenance work is carried out in the pit for the in-pipe work device placed on the pipe, or if the overall length of the in-pipe work device is longer than the length between the two pipe parts, a part of the in-pipe work device can be The maintenance work can be carried out in the pit by entering the pipe part on the side where the work is not performed by the in-pipe work device, and when the maintenance work is completed, the in-pipe work device is embedded from the launcher. Get inside the tube, You can resume work by the working device.
Therefore, the maintenance work for the conventional in-pipe work device that has been performed on the road surface can be performed in the pit, and the area occupied by the road surface can be reduced when performing the in-pipe work.

  The 2nd characteristic structure of this invention exists in the point which covers the upper part of the said pit with the lining board in which the opening which an operator can enter / exit is formed.

[Action and effect]
The lining plate on which the operator can enter and exit is used to cover the top of the pit, so the operator can enter the pit below the lining plate from the opening of the lining plate and perform the necessary work. Even during the pipe work, the upper area of the pit can be used as a work space to further reduce the exclusive area of the road surface.
In addition, when the road surface can be temporarily restored at night when no pipe work is performed, the opening of the lining plate is closed while the pipe work device or launcher is left in the pit. Since the road surface can be easily restored temporarily, the work equipment can be removed and re-installed so that the original work time can be easily secured and the work in the pipe can be reduced. Can be implemented efficiently.

  According to a third characteristic configuration of the present invention, when the in-pipe working device in the buried pipe is moved onto the placement surface, the working device operating cable connected to the in-pipe working device is replaced with the working device operating cable. It is in the point of replacing | exchanging with the temporary cable for working apparatus operation | movement with higher flexibility than this.

[Action and effect]
The working device operating cable connected to the in-pipe working device is generally coated with a wear-resistant material so as to prevent damage due to contact with the inner surface of the tube, and has low flexibility. It is difficult to bend with a small bending radius.
For this reason, when the maintenance work for the in-pipe work device is performed in the pit, the movement range of the in-pipe work device in the pit is constrained to a range in which the work device operating cable can be deformed and is installed in the pit. There is a problem that it is difficult to move the in-pipe working device on the mounting surface of the launcher.
Therefore, in the third feature configuration, when the in-pipe work device in the buried pipe is moved onto the placement surface, the work device operation cable connected to the in-pipe work device is more suitable than the work device operation cable. Since it is replaced with a temporary cable for working device operation with high flexibility, the range of movement in the pit of the in-pipe work device is widened, and the in-pipe work device is moved onto the mounting surface of the launcher installed in the pit. In addition, the temporary cable can be used to send maintenance drive power, control signals, and the like to the in-pipe work device to perform necessary maintenance work.

  A fourth characteristic configuration of the present invention is a launcher used in the method for performing an in-pipe operation according to claims 1 to 3, wherein the mounting surface has a length longer than the length between the pipe portions, and The shape along the width direction is formed in an arc shape, and one end side in the longitudinal direction of the mounting surface is formed in an arc shape having substantially the same diameter as the inner diameter of one tube portion, and the length of the mounting surface is A fixing portion that can be fixed so that one end side in the direction is connected substantially flush with the inner surface of the tube of one tube portion, and the lower surface of the portion that forms the other end in the longitudinal direction of the placement surface, It is in the point that it is formed in an arc shape having substantially the same diameter as the inner diameter of the other tube portion along the longitudinal direction of the mounting surface, and can be placed on the inner surface of the tube of the other tube portion.

[Action and effect]
The shape along the horizontal width direction of the mounting surface is formed in an arc shape, and one end side in the longitudinal direction of the mounting surface is formed in an arc shape having substantially the same diameter as the inner diameter of one tube portion, and the mounting surface Since the fixing part that can be fixed is provided so that one end side in the longitudinal direction is connected to the pipe inner surface of one pipe part substantially flush with the pipe inner part, The in-pipe working device can be smoothly moved across one end in the longitudinal direction of the surface and the inner surface of the one pipe portion.
In addition, the mounting surface is formed with a length longer than the length between the two tube portions, and the lower surface of the portion forming the other longitudinal end of the mounting surface is the inner surface of the other tube portion. The part forming the other end in the longitudinal direction of the mounting surface is changed according to the length between the two pipe parts. And it can install and support on the pipe inner surface of the other pipe part, and even when the length between both pipe parts changes for every pit of a work site, it can be used repeatedly.
Furthermore, since the lower surface of the portion forming the other end side in the longitudinal direction of the mounting surface is formed in an arc shape having substantially the same diameter as the inner diameter of the other tube portion along the longitudinal direction of the mounting surface, With the lower surface of the portion forming the other end in the longitudinal direction of the mounting surface being in contact with the inner surface of the other tube portion substantially continuously along the tube circumferential direction, Easy to install.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 to 8 show a method for carrying out an in-pipe operation according to the present invention for a buried pipe A for supplying city gas. In this in-pipe operation, an in-pipe traveling robot for polishing for polishing the inner surface of the tube, an inner surface of the tube, and FIGS. An in-pipe work device 1 such as a welding in-pipe travel robot for carrying out the welding work is moved into the buried pipe A to polish the inner surface of the pipe, and a welding work to repair the buried pipe A by welding from the inner side of the pipe. The work by the in-pipe work device 1 is appropriately interrupted, and maintenance work such as maintenance and inspection of the in-pipe work device 1 itself and supply of abrasives and welding wires is performed as necessary.
Hereinafter, it demonstrates in order.

  As shown in FIG. 1, a pit 2 in which a straight pipe portion of a circular buried pipe A is exposed is excavated and formed on a road surface 3, and a part 4 of the straight pipe portion in the pit 2 is cut into a ring and cut into each other. A pair of opposing pipe cutting ends 5a and 5b are opened in the pit 2, and the working flange 7 is fixed by welding or the like near the pipe cutting ends of the pipe portions 6a and 6b.

  Next, as shown in FIG. 2, a road surface setting launcher 8 having a hook-shaped mounting surface 8a for mounting the in-pipe work device 1 is set on the road surface 3 near the pit, and the road surface setting launcher is installed. 8 is connected to the pipe cutting end 5a of the pipe portion 6a on the work target side by a guide pipe 9, and a console on which the operation of the in-pipe working device 1 is controlled, a retractor for the cable 10, and the like are mounted. The vehicle 11 is parked near the other end side of the road surface setting launcher 8, and the in-pipe work device 1 is mounted on the mounting surface 8 a of the road surface setting launcher 8.

  The in-pipe work device 1 and the console vehicle 11 are connected by a work device operation cable 10 for supplying work power and transmitting work data and control signals. A plurality of thin cables for working power supply and communication are bundled and covered with resin or reinforcing fibers.

  FIG. 2 shows a state in which the welding in-pipe traveling robot 1a as the in-pipe working device 1 is placed. The welding in-pipe traveling robot 1a is sequentially forwarded from the front side in the direction of entry into the pipe. A forward traveling carriage 12a equipped with a monitoring camera, a welding carriage 12b equipped with a welding device and a monitor camera, a wire conveyance carriage 12c for conveying a welding wire supplied to the welding apparatus, and a control device The control carriage 12d, the reverse traveling carriage 12e, and the connector carriage 12f equipped with a rear monitoring camera are connected in series, and the working device operating cable 10 is the last. It is detachably connected to the tail connector carriage 12f.

  Next, as shown in FIG. 3, the in-pipe traveling robot 1a is inserted into the one pipe portion 6a from the one pipe cutting end 5a through the guide pipe 9 over the entire length, and then shown in FIG. As described above, the road surface installation launcher 8 and the guide pipe 9 are removed, and the in-pipe traveling robot 1a for welding is placed between the two pipe portions 6a and 6b forming the pipe cutting ends 5a and 5b, respectively. An in-pipe traveling robot 1a for welding within a pit having a possible mounting surface 13a can be moved in series through the mounting surface 13a and into the pipes of both pipe portions 6a and 6b. Install in.

  As shown in FIG. 8, the launcher 13 for installation in the pit has a thin bowl shape longer than the length between the pipe portions 6a and 6b, and is longer than the length L between the pipe portions 6a and 6b. And the mounting surface 13a whose shape along a horizontal width direction is circular arc shape is formed in the inner surface side.

  Then, as shown in FIG. 9 (a), one end in the longitudinal direction of the mounting surface 13a is connected so that one end in the longitudinal direction of the mounting surface 13a can be connected substantially flush with the inner surface of the tube of the one tube portion 6a. 8 is formed in an arc shape having a radius R1 substantially the same as the inner diameter of the tube portion 6a, and a fixing flange 14 is provided as a fixing portion that can be bolted to the working flange 7 of the one tube portion 6a. As shown, the lower surface of the portion forming the other end in the longitudinal direction of the mounting surface 13a is formed in an arc shape having a radius R2 substantially the same as the inner diameter of the tube portion 6b along the longitudinal direction of the mounting surface 13a. And it is comprised so that mounting is possible on the pipe inner surface of the other pipe part 6b which is not performing the operation | work by the welding pipe running robot 1a.

  Next, as shown in FIG. 5, the upper part of the pit 2 is covered with a steel lining plate 16 in which an opening 15 in which an operator can enter and exit is formed, and the working device operating cable 10 is passed through the opening 15. The console car 11 is moved near the pit 2.

  Then, the welding in-pipe travel robot 1a is moved from the pipe portion 6a into the buried pipe A to perform welding work on the inner surface of the pipe, and during maintenance such as when it becomes necessary to replenish the welding wire, the in-pipe travel for welding is performed. The operation by the robot 1a is interrupted, and the in-pipe traveling robot 1a is moved toward the pit 2 and placed on the mounting surface 13a of the pit installation launcher 13 as shown in FIG. Do work.

  When placing the welding pipe traveling robot 1a on the mounting surface 13a, the working device operating cable 10 connected to the connector traveling body 12f is more flexible than the working device operating cable 10 and is used for welding. A plurality of cables 17 for working power supply and for communication, which are thin and have a thin diameter, as temporary cables for operating a working device that easily deforms following the movement of the in-pipe traveling robot 1a onto the mounting surface. Is replaced and connected to the connector traveling body 12f. However, when the in-pipe traveling robot 1a is moved again into the buried pipe A after the maintenance work is completed, it is necessary to replace it with the working device operating cable 10. Of course.

  Also, when the work is resumed the next day after the day's work is finished and the nighttime when the pipe work is not performed, as shown in FIG. 7, it is mounted on the pit installation launcher 13 or on it. The opening 15 of the lining plate 16 is closed with the lid plate 18 while the welding robot 1a for welding in the pipe is left in the pit 2, and the road surface 3 is temporarily restored so that the vehicle or the like can pass.

  In addition, in place of the welding in-pipe traveling robot 1a, when performing a polishing operation for polishing the inner surface of the pipe using a polishing in-pipe traveling robot, the same operation is performed except that the operation content in the buried pipe is different. Therefore, the description is omitted.

  When the polishing operation and the welding operation for the buried pipe A communicating with the one pipe portion 6a are completed, the fixing flange 14 of the launcher 13 for installation in the pit is bolted to the working flange 7 of the other pipe portion 6b. Then, the in-pipe operation such as the polishing operation or the welding operation for the buried pipe A communicating with the other pipe portion 6b is performed by changing the direction of the in-pipe traveling robot or the welding in-pipe traveling robot 1a.

[Second Embodiment]
Another embodiment of the implementation method of the pipe work by this invention is described in order based on FIGS.
As shown in FIG. 1 in the first embodiment, the pipe cutting ends 5a and 5b are opened in the pit 2, and the working flange 7 is welded near the pipe cutting ends of the pipe portions 6a and 6b. Then, as shown in FIG. 10, the road surface installation launcher 8 is installed on the road surface 3 near the pit, and the in-pipe installation robot 13 for welding is installed between the pipe portions 6a and 6b. It is installed in the same manner as in the first embodiment so that it can move in series over the pipes of both pipe parts 6a, 6b, and further, one end side of the road surface setting launcher 8 and the pipe cutting end part 5a on the work object side and in the pit The installation launcher 13 is connected by an S-shaped guide pipe 9, and the welding pipe traveling robot 1 a (1) is placed on the placement surface 8 a of the road surface installation launcher 8.

  The guide pipe 9 includes a flange joint that includes a launcher side guide pipe 19 connected to the road surface installation launcher 8 side and a buried pipe side guide pipe 20 connected to the pipe cutting end 5a side and the pit installation launcher 13 side. As shown by the phantom line in FIG. 10, the connection phase of the launcher side guide pipe 19 with respect to the buried pipe side guide pipe 20 is changed by 180 °, and the in-pipe working device 1 is configured. Can be inserted into the pipe portion 6a even from the road surface 3 above the pipe portion 6a on the work object side.

  As shown in FIGS. 11 and 12, the buried pipe side guide pipe 20 includes a guide pipe flange 22 that can be bolted to the working flange 7, and a launcher flange fixed to the left and right sides of the launcher 13 for installation in the pit. 23 is provided with a slide plate 24 which can be bolted, and the slide plate 24 is cut along the both sides of the tube wall lower part on the tube cutting end 5a side substantially parallel to the tube axis, The observation window hole 25 is formed so that the inside of the buried pipe side guide pipe 20 can be observed.

  Next, as shown in FIG. 13, the in-pipe traveling robot 1a is inserted into the one pipe portion 6a from the one pipe cutting end 5a through the guide pipe 9 over the entire length, and is then run in the pipe. When it is desired to inspect on the pit installation launcher 13 before, the work device operating cable 10 is replaced with a plurality of cables (temporary cables) 17 and connected to the connector traveling body 12f.

  When this cable is replaced, as shown in FIG. 14, the slide plate 24 of the buried pipe side guide pipe 20 is slid with respect to the flange launcher 23 of the launcher 13 for installation in the pit, and the guide pipe 9 is connected to the other pipe cutting end. In this state, the slide plate 24 is bolted to the flange launcher 23, the guide pipe 9 is temporarily fixed, the working device operating cable 10 is removed from the connector traveling body 12f, and the temporary cable 17 is embedded. The connector is connected to the connector traveling body 12f through the gap 26 between the pipe-side guide pipe 20 and the launcher 13 for installation in the pit.

  Thereafter, the road surface setting launcher 8 and the guide pipe 9 are removed, and the upper part of the pit 2 is covered with the lining plate 16 in the same procedure as in the first embodiment, and the inner surface of the pipe is covered with the welding in-pipe traveling robot 1a. During maintenance, the in-pipe traveling robot 1a is moved toward the pit 2 and placed on the placement surface 13a of the in-pit installation launcher 13, and necessary maintenance work is performed.

  When a series of in-pipe operations is completed and the welding in-pipe travel robot 1a is collected on the road surface 3 side, the road surface installation launcher 8 is installed again, and one end side of the road surface installation launcher 8 and the work target side are installed. The pipe cutting end 5 a and the launcher 13 for installation in the pit are connected by the guide pipe 9, and the welding in-pipe traveling robot 1 a is recovered to the road surface 3 side through the guide pipe 9.

  Other configurations are the same as those of the first embodiment, but if the guide pipe 9 shown in the present embodiment is used, after the polishing work and the welding work for the buried pipe A communicating with the one pipe portion 6a are completed, When performing in-pipe work such as polishing work or welding work for the buried pipe A communicating with the other pipe part 6b, the guide pipe 9 can be operated without particularly removing the launcher 13 for installing in the pit from the pit 2. The pipe working device 1 (1a) can be inserted into the other pipe portion 6b by connecting to the pipe cutting end 5b side.

[Other Embodiments]
1. In the method for carrying out in-pipe work according to the present invention, both end sides of the launcher may be connected to both pipe parts.
2. The method for carrying out in-pipe work according to the present invention may be used when performing inspection work in the pipe, and the work content in the pipe is not limited.
3. The method for carrying out pipe work according to the present invention may be used when pipe work is performed on a buried pipe for water supply.

Longitudinal cross-sectional view for explaining how to perform pipe work Longitudinal cross-sectional view for explaining how to perform pipe work Longitudinal cross-sectional view for explaining how to perform pipe work Longitudinal cross-sectional view for explaining how to perform pipe work Longitudinal cross-sectional view for explaining how to perform pipe work Longitudinal cross-sectional view for explaining how to perform pipe work Longitudinal cross-sectional view for explaining how to perform pipe work Side view of launcher (A) Sectional view taken along line II in FIG. 8, (B) Sectional view taken along line II in FIG. Longitudinal sectional view for explaining the second embodiment Explanatory perspective view of the main part of the second embodiment Front view for explaining main part of second embodiment Longitudinal sectional view for explaining the second embodiment Longitudinal sectional view for explaining the second embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-pipe work apparatus 2 Pit 3 Road surface 4 Part of straight pipe part 5a Pipe cutting end part 5b Pipe cutting end part 6a Pipe part 6b Pipe part 10 Working device operating cable 13a Mounting surface 13 Launcher 14 Fixing part 15 Opening 16 Covering Work board 17 Temporary cable A Buried pipe L Length

Claims (4)

Form a pit on the road surface where the straight pipe part of the buried pipe is exposed,
A part of the straight pipe portion in the pit is excised, and a pair of pipe cutting ends facing each other is opened in the pit.
An in-pipe operation method for inserting an in-pipe work device into the buried pipe from one of the tube cutting ends and performing the in-pipe work using the in-pipe work device,
A launcher having a placement surface on which the in-pipe work device can be placed is placed between both pipe portions forming the pair of pipe cut ends, and the in-pipe work device passes over the placement surface. In-pipe work method for installing the pipes so that they can be moved in series over the pipes of both pipe parts.   The method for carrying out in-pipe work according to claim 1, wherein an upper part of the pit is covered with a lining plate in which an opening through which an operator can enter and exit is formed.   When the in-pipe working device in the buried pipe is moved onto the mounting surface, the working device operating cable connected to the in-pipe working device is more flexible than the working device operating cable. The method for carrying out in-pipe work according to claim 1 or 2, wherein the temporary cable for operation is replaced. It is a launcher used for the implementation method of the pipe work of Claims 1-3,
The mounting surface is longer than the length between the two tube portions, and the shape along the width direction is formed in an arc shape,
One end side in the longitudinal direction of the mounting surface is formed in an arc shape having substantially the same diameter as the inner diameter of the one tube portion, and the one end side in the longitudinal direction of the mounting surface is substantially surface with respect to the inner surface of the tube of the one tube portion. Provide a fixed part that can be fixed to be connected to one,
The lower surface of the portion forming the other end side in the longitudinal direction of the mounting surface is formed in an arc shape having substantially the same diameter as the inner diameter of the other tube portion along the longitudinal direction of the mounting surface. A launcher that can be placed on the inner surface of the tube.

Images