JP5693154B2 - Pipe inner surface cleaning method and recovery jig - Google Patents

Description

  The present invention relates to a method for cleaning an inner surface of a pipe such as a water pipe and a recovery jig used for cleaning.

  Conventionally, with respect to this type of pipe inner surface cleaning method, for example, as shown in FIG. 22, the upstream side open / close valve 102 and the downstream side open / close valve 103 of the water pipe 101 are closed, and a predetermined area of the water pipe 101 is obtained. The flow of 104 is interrupted, and in this state, the expandable / contractible cleaning pig 105 is inserted into the water pipe 101 from the upstream start-side branch pipe 106, and then the upstream on-off valve 102 is opened to open the water pipe 101. The cleaning pig 105 is transferred to the downstream side of the water pipe 101 while the inner surface of the water pipe 101 is cleaned with the cleaning pig 105, and after the cleaning, the cleaning pig 105 is moved downstream to the arrival side branch pipe. A cleaning method for recovering from No. 107 is known (see Patent Document 1 below). Moreover, as the cleaning pig 105 that can be expanded and contracted, a compression-deformable rubber having a hollow portion inside is known (see Patent Document 2 below).

  The inner diameters of the start side and arrival side branch pipes 106 and 107 are smaller than the inner diameter of the water pipe 101. In the above-described cleaning method, the cleaning pig 105 is reduced in diameter in the start side branch pipe 106, When inserted from the start side branch pipe 106 into the water pipe 101, the diameter is increased, and when inserted from the water pipe 101 into the arrival side branch pipe 107, the diameter is reduced.

JP2009-66522 JP 2001-87727 A

  However, in the above-described conventional type, particularly when there is a large difference between the inner diameter of the arrival-side branch pipe 107 and the inner diameter of the water pipe 101, the cleaning pig 105 is inserted into the arrival-side branch pipe 107 from the water pipe 101. When it is done, the diameter is greatly reduced. For this reason, the cleaning pig 105 having a greatly reduced diameter is clogged in the middle of the arrival side branch pipe 107, and it is difficult to smoothly remove the cleaning pig 105 (cleaning member) from the arrival side branch pipe 107. The problem arises.

  It is an object of the present invention to provide a pipe inner surface cleaning method and a recovery jig capable of easily taking out and recovering a cleaning member from an arrival side branch pipe.

In order to achieve the above object, the pipe inner surface cleaning method according to the first aspect of the present invention is inserted into the main pipe from the upstream start-side branch pipe in a contracted state with the expandable / contractible cleaning member having a hollow portion therein,
In the main pipe, the fluid is injected into the hollow portion of the cleaning member to expand the cleaning member,
The inner surface of the main pipe is cleaned with the cleaning member by flowing the fluid into the main pipe and transferring the cleaning member,
When the cleaning member recognizes that the cleaning member reaches the downstream reaching branch pipe and is captured by the capturing jig provided in advance on the reaching branch pipe, the main pipe is in a water-stopped state. After removing the capture jig from the arrival side branch pipe, insert the recovery jig into the arrival side branch pipe,
The cleaning member is pierced and ruptured with a recovery jig,
By removing the recovery jig from the arrival side branch pipe, the cleaning member is pulled out from the main pipe through the arrival side branch pipe by using the recovery jig.

According to this, it is possible to prevent the cleaning member from passing through the main pipe from the upstream side to the downstream side of the arrival-side branch pipe and becoming unrecoverable.
Even if there is a significant difference between the inner diameter of the main pipe and the inner diameter of the reaching branch pipe that is smaller than that, use the recovery jig after rupturing the cleaning member with the recovery jig. Since the cleaning member is pulled out from the arrival side branch pipe, the cleaning member can be easily taken out from the arrival side branch pipe and collected.

The method for cleaning the inner surface of the pipe according to the second aspect of the invention is to rupture the cleaning member with a recovery jig, and then pass the water through the main pipe.
The cleaning member drawn out from the main pipe into the arrival side branch pipe is pushed out by fluid pressure.

  According to this, when the cleaning member is pulled out from the arrival side branch pipe using the recovery jig, the cleaning member is pushed out by the fluid pressure, so that the cleaning member can be easily removed from the arrival side branch pipe. Is possible.

The method for cleaning the inner surface of the pipe according to the third aspect of the invention uses a scissors as a recovery jig.

  According to this, by inserting the scissors into the reaching side branch pipe, piercing and rupturing the cleaning member at the tip of the scissors, by hooking the ruptured cleaning member on the tip of the scissors and pulling it out from the reaching side branch pipe, The cleaning member can be easily recovered.

The fourth invention is a recovery jig used in the pipe inner surface cleaning method according to any one of the first to third inventions,
A rod-like portion that can be inserted into and removed from the reaching-side branch pipe, and a piercing portion that is provided at the tip of the rod-like portion and pierces the cleaning member
A hooking portion for hooking the ruptured cleaning member is formed at the piercing portion.

  According to this, the recovery jig is inserted into the arrival side branch pipe, the cleaning member is pierced and ruptured at the tip of the piercing part, and the ruptured cleaning member is hooked on the latching part from the arrival side branch pipe. By pulling out, the cleaning member can be easily collected.

  As described above, according to the present invention, the cleaning member can be easily taken out from the arrival side branch pipe and collected. In addition, it is possible to prevent the cleaning member from passing through the main pipe from the upstream side to the downstream side of the arrival side branch pipe and falling into an unrecoverable state. In addition, the cleaning member can be pierced and ruptured at the tip of the piercing portion of the recovery jig, and the cleaning member can be easily pulled out by hooking the ruptured cleaning member onto the latching portion and pulling it out from the arrival side branch pipe. It can be recovered.

It is a figure of a water pipe and its incidental equipment in a 1st embodiment of the present invention. It is a figure which shows the state which wash | cleans the water pipe using the washing | cleaning apparatus similarly. It is sectional drawing of the ball | bowl for washing | cleaning used for the washing | cleaning in a water pipe. It is a figure of the eaves used for the washing | cleaning in a water pipe same as the above, (a) is a front view, (b) is a XX arrow directional view in (a). It is a side view of the capture jig used for cleaning the inside of the water pipe. It is a partial expanded sectional view of the jig for acquisition same as the above. It is a XX arrow line view in FIG. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which inserts the ball | bowl for washing | cleaning in a water pipe. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of attaching the capture jig | tool. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of attaching the capture jig | tool. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of attaching the capture jig | tool. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which wash | cleans the water pipe with the ball for washing | cleaning. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which the ball | bowl for washing | cleaning contact | abutted to the receiving member of the jig | tool for acquisition. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state by which the ball | bowl for washing | cleaning was capture | acquired with the jig | tool for acquisition. It is a XX arrow line view in FIG. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which removed the jig | tool for acquisition. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of bursting the washing | cleaning ball | bowl with a scissors. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of pulling up the washing | cleaning ball with a scissors. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which collect | recovers the balls for washing | cleaning. It is a figure of the 1st rust removal jig | tool used for the washing | cleaning in the water pipe in the 2nd Embodiment of this invention, (a) is a side view, (b) is a XX arrow line view in (a). It is. It is a figure of the 2nd rust removal jig | tool used for the washing | cleaning in a water pipe, (a) is a side view, (b) is a XX arrow line view in (a). It is a figure explaining the washing | cleaning method in the conventional water pipe.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
First, a first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, reference numeral 1 denotes a water pipe (an example of a main pipe) buried in the ground, and the water pipe 1 is provided with an upstream on-off valve 2 and a downstream on-off valve 3. . In the drawing, when each on-off valve 2 or 3 is closed, it is displayed in black, and when it is open, it is displayed in white.

  Between both the on-off valves 2 and 3, it is the water stop area 4 which stops water when the inside of the water pipe 1 is wash | cleaned. The water cutoff section 4 is provided with an upstream start side fire hydrant part 5 and a downstream arrival side fire hydrant part 6. Both fire hydrants 5, 6 are branched pipes 7, 8 branched from the top of the water pipe 1, ball-type repair valves 9, 10 connected to the upper ends of the branch pipes 7, 8, 10 and fire hydrants 11 and 12 connected to the upper end.

  The fire hydrant parts 5 and 6 are respectively stored in the fire hydrant part storage spaces 13 and 14 dug in the ground. The inner diameters of the branch pipes 7 and 8 are smaller than the inner diameter of the water pipe 1. Further, the upper surface openings of the fire hydrant storage spaces 13 and 14 are closed by detachable lids 15 and 16. Moreover, between the fire hydrant parts 5 and 6 is a cleaning target section 17 when cleaning the inside of the water pipe 1.

  As shown in FIG. 2, reference numeral 21 denotes a cleaning device that cleans the cleaning target section 17 of the water pipe 1. The cleaning device 21 includes an expandable / contractible cleaning ball 22 (an example of a cleaning member), connecting short tubes 23 and 24, an emergency ball collecting means 25 for collecting the cleaning ball 22 in an emergency, and a draining means 26. And a catching jig 27 for catching the cleaning ball 22 in the water pipe 1, and a trough 28 for rupturing and collecting the trapped cleaning ball 22 (an example of the collecting jig, see FIG. 4). Have.

  As shown in FIG. 3, the cleaning ball 22 is made of an elastic material such as rubber and has a spherical part 33 having a hollow part 32 therein, a sponge part 34 covering the outer surface of the spherical part 33, and a hollow part 32 from the outside. And a water inlet 35 communicating with the water. A water injection hose 36 for injecting water 37 (an example of fluid) into the hollow portion 32 is detachably connected to the water injection port 35. The water injection port 35 is provided with a backflow prevention mechanism (not shown) such as a valve for preventing the water 37 injected from the water injection port 35 into the hollow portion 32 from flowing out.

The starting short connecting pipe 23 is detachable from the upper end of the starting repair valve 9, and the reaching connecting short pipe 24 is detachable from the upper end of the reaching repair valve 10.
The emergency ball collection means 25 includes a collection rope 38 connected to the cleaning ball 22 and a winding device 39 that winds and sends the collection rope 38. The winding device 39 includes a connection frame 40 that is detachable at the upper end of the starting connection short tube 23, and an electric reel 41 that is provided at the upper end of the connection frame 40.

  The drainage means 26 includes a drainage connection pipe 43 detachably attached to the upper end of the connecting short pipe 24 on the reaching side, a drainage pipe 44 connected to the drainage connection pipe 43, and a drainage valve that opens and closes the drainage pipe 44. 45. The drainage connection pipe 43 is a T-shaped pipe.

  As shown in FIGS. 4 and 17, the trough 28 is inserted into and removed from the vertical pipe 47 on the reaching side communicating with the water pipe 1 from the drainage connection pipe 43 through the connection short pipe 24, the repair valve 10 and the branch pipe 8. It has a free rod-like portion 48 and a piercing portion 49 provided at the tip of the rod-like portion 48 and having a sharp tip. The piercing portion 49 is provided with a plurality of retaining plates 49a (returns) for catching the ruptured cleaning balls 22. These latching plates 49 a are an example of latching portions, and are provided radially at the base end portion of the piercing portion 49. In FIG. 4, four latch plates 49a are provided, but the number is not limited to four, and a plurality or a single plate may be provided.

The capturing jig 27 has the following configuration.
As shown in FIGS. 5 to 7, the catching jig 27 has a mounting flange 51 that is detachable from a flange 43 a (see FIG. 9) formed in the upper end opening of the drainage connection pipe 43. . A through hole 52 is formed in the center of the mounting flange 51, and the movable member 50 is inserted into the through hole 52 so as to be movable up and down. The movable member 50 can be inserted into and removed from the vertical duct 47 on the reaching side, and has an outer pipe member 53 and a rod-shaped member 54 inserted into the pipe member 53. The pipe member 53 can be raised and lowered with respect to the mounting flange 51, and the rod-shaped member 54 can be raised and lowered with respect to the pipe member 53.

  The pipe member 53 has a disk-shaped upper plate 55 at the lower end. The rod-shaped member 54 has a threaded portion 56 at the upper end and a disk-shaped lower plate 57 at the lower end. The threaded portion 56 protrudes above the pipe member 53, and a washer 62 is fitted on the threaded portion 56 and a nut 63 is screwed. Further, the lower plate body 57 faces the lower side of the upper plate body 55.

  Between the upper plate 55 and the lower plate 57, a closing ball 69 made of an elastic material such as rubber that can be expanded and contracted in the radial direction is sandwiched. The closing ball 69 closes the lower end opening of the branch pipe 8 on the reaching side when the movable member 50 is raised. The lower end portion of the rod-shaped member 54 passes through the closing ball 69. Further, the threaded portion 56, the washer 62, and the nut 63 constitute a diameter expanding means 64 that expands the closing ball 69 in the radial direction of the branch pipe 8 on the reaching side.

  The lower plate 57 is provided with a receiving member 58 for receiving the cleaning ball 22 from the downstream side in the water pipe 1 and a stopper 59. The receiving member 58 has a flat plate shape, and an upper end portion of the receiving member 58 is connected to the lower plate body 57 via a hinge 60, and is swingable in the pipe length direction of the water pipe 1 around the hinge 60. As shown by the solid line in FIG. 5, the receiving member 58 hangs downward in a state where it does not receive external force, and a swinging range from the hanging posture to the downstream side of the water pipe 1 is determined by a stopper 59. It is restricted to the swing range. As indicated by the phantom line in FIG. 5, the receiving member 58 assumes an inclined posture in which the lower part is inclined toward the downstream side of the water pipe 1 when it comes into contact with the stopper 59.

  As shown in FIG. 6, the mounting flange 51 and the pipe member 53 are sealed with a sealing material such as an O-ring 61, and a screw-fastening-type pressing member 65 for holding the O-ring 61 is a pipe member. 53 is externally fitted. The male screw formed on the pressing member 65 is screwed into the female screw formed on the through hole 52 of the mounting flange 51 and the pressing member 65 is tightened, whereby the O-ring 61 is pressed and compressed, and the mounting flange 51 is compressed. And the pipe member 53 are sealed.

  As shown in FIG. 5, the pipe member 53 is fitted with a centering jig 66 that aligns the axis of the movable member 50 with the axis of the branch pipe 8 on the arrival side. The centering jig 66 is movable in the axial direction with respect to the pipe member 53 and is fixed to the pipe member 53 by fixing bolts 67.

  As shown in FIGS. 5 and 7, the pipe member 53 is fitted with a recognition member 71 for recognizing the rise of the movable member 50 with respect to the mounting flange 51. The recognition member 71 has a cylindrical main body 72 that is movable in the axial direction (vertical direction) with respect to the pipe member 53, and a fixing bolt 73 (fixing member) that fixes the main body 72 to the pipe member 53. ing.

Hereinafter, a cleaning method for cleaning the inner surface of the water pipe 1 using the cleaning device 21 will be described.
(1) First, as shown in FIG. 8, both the on-off valves 2 and 3 are closed, and the cleaning target section 17 is brought into a water shut-off state (a state where the flow is shut off). Thereafter, the lids 15 and 16 are removed, the fire hydrants 11 and 12 are removed from the repair valves 9 and 10, the connection short pipe 23 is connected to the upper end of the start-side repair valve 9, and the connection short pipe is connected to the upper end of the arrival-side repair valve 10. Connect the tube 24. At this time, both repair valves 9 and 10 are left open.

  (2) The tip of the water injection hose 36 is connected to the water injection port 35 of the cleaning ball 22, the recovery rope 38 is connected to the cleaning ball 22, and the diameter of the cleaning ball 22 is reduced (reduced), It inserts in the water pipe 1 through the repair valve 9 and the branch pipe 7 from the connection side short pipe 23 on the start side.

  (3) As shown in FIG. 3, a predetermined amount of water 37 is injected from the water injection hose 36 through the water injection port 35 of the cleaning ball 22 into the hollow portion 32 to expand the diameter of the cleaning ball 22 (expansion). Let As a result, the outer surface of the cleaning ball 22 (i.e., the sponge portion 34) is brought into contact with the inner surface of the water pipe 1 with certainty.

(4) Pull the water injection hose 36 upward to remove the tip of the water injection hose 36 from the water injection port 35 of the cleaning ball 22, and then collect the water injection hose 37.
(5) Next, as shown in FIG. 2, the flange at the lower end of the connection frame 40 of the emergency ball collecting means 25 is joined to the flange at the upper end of the connection short tube 23 on the start side. At this time, the gap between the flange at the lower end of the connection frame 40 and the flange at the upper end of the connection short pipe 23 on the starting side is sealed with a sealing material (not shown) such as a gasket. The space between the recovery rope 38 is sealed with a sealing material (not shown) such as packing.

(6) The drainage connection pipe 43 is connected to the upper end of the connection side short pipe 24, and the catching jig 27 is attached as follows.
(7) With the holding member 65 loosened and the fixing bolt 73 loosened so that the recognition member 71 can be raised and lowered with respect to the pipe member 53, as shown in FIG. The connecting flange 43 is inserted into the vertical pipe 47 on the reaching side from the upper end opening of the connecting pipe 43, and the mounting flange 51 is joined to the upper flange 43 a of the draining connecting pipe 43.

  (8) As shown in FIG. 10, by turning the nut 63, the rod-shaped member 54 is pulled up with respect to the pipe member 53, the vertical distance between the upper plate 55 and the lower plate 57 is reduced, and the closing ball The diameter of 69 in the horizontal direction is larger than the inner diameter of the branch pipe 8.

  (9) The movable member 50 is once pulled up with respect to the mounting flange 51 until the closing ball 69 comes into contact with the joint portion between the water pipe 1 and the reaching branch pipe 8 from below, and then the movable member 50 is moved to a predetermined position. As shown in FIG. 11, a gap 74 having a predetermined dimension (for example, several centimeters) is formed between the top of the water pipe 1 and the upper plate 55 as shown in FIG.

  (10) The pressing member 65 is tightened, and the fixing bolt 73 is tightened with the lower end of the recognition member 71 in contact with the upper end of the pressing member 65 to fix the recognition member 71 to the pipe member 53. Thereby, the movable member 50 is supported by the mounting flange 51 via the recognition member 71 and the pressing member 65 and is held in a state of being suspended in the vertical duct 47 on the reaching side. Thereby, the capturing jig 27 is attached.

  (11) As shown in FIGS. 2 and 12, the upstream on-off valve 2 is opened while the downstream on-off valve 3 remains closed. Thereby, the water W (an example of fluid) in the water pipe 1 flows from the opening / closing valve 2 through the section 17 to be cleaned of the water pipe 1, and from the branch pipe 8 on the arrival side, the repair valve 10, the connecting short pipe 24, and the drainage pipe. The water is drained to the drainage pipe 44 through the connection pipe 43. For this reason, the cleaning ball 22 in the expanded state is transferred from the start side to the arrival side in the cleaning target section 17 in the water pipe 1 by water pressure. At this time, the sponge portion 34 of the cleaning ball 22 is moved to the inner surface of the water pipe 1. The inner surface of the water pipe 1 is cleaned by sliding. At this time, the recovery rope 38 of the emergency ball recovery means 25 is sent out from the reel 41 with the transfer of the cleaning ball 22.

  At this time, as shown in FIG. 6, since the O-ring 61 is pressed and compressed by the pressing member 65, the gap between the mounting flange 51 and the pipe member 53 is sealed, and the cleaning ball 22 is also sealed. Can be prevented from rising due to the internal water pressure before being received by the receiving member 58.

  (12) As shown in FIG. 13, the cleaning ball 22 is received by the receiving member 58 when it reaches the lower side of the branch pipe 8 on the reaching side. At this time, the receiving member 58 is pushed from the upstream side to the downstream side, swings to the downstream side around the hinge 60, contacts the stopper 59, and assumes an inclined posture. As a result, the cleaning ball 22 is captured by the capturing jig 27.

At this time, the centering jig 66 abuts against the inner surface of the branch pipe 8, whereby the movable member 50 can be prevented from changing in the radial direction of the branch pipe 8.
Further, as shown in FIGS. 14 and 15, the movable member 50 rises upon receiving an upward force F from the captured cleaning ball 22. Due to this force F, the recognition member 71 rises from the pressing member 65 together with the movable member 50, and a gap 75 is generated between the recognition member 71 and the pressing member 65. The operator can recognize (confirm) surely and accurately that the cleaning ball 22 is captured by the capturing jig 27 by visually confirming the gap 75.

  Further, when the cleaning ball 22 is captured as described above, the closing ball 69 rises together with the movable member 50, closes the lower end opening of the branch pipe 8 on the arrival side, and stops water. Thereby, it is possible to prevent a part of the cleaning ball 22 from entering the branch pipe 8. If a part of the cleaning ball 22 enters the branch pipe 8, the cleaning ball 22 may inadvertently rupture and sink into the water pipe 1 and become unrecoverable.

  (13) The upstream on-off valve 2 is closed to cut off the water to be cleaned 17. Thereafter, as shown in FIG. 16, the mounting flange 51 is removed from the flange 43 a at the upper end of the drainage connection pipe 43, and the capturing jig 27 is removed from the vertical pipe 47 on the arrival side and removed.

  (14) As shown in FIG. 17, the tub 28 is inserted into the branch pipe 8 on the reaching side from the upper end opening of the drainage connection pipe 43, and the cleaning ball 22 is pierced at the tip of the piercing portion 49 of the tub 28. And burst.

  (15) As shown in FIG. 18, a flange lid 78 having a through hole 77 at the center is attached to the flange 43 a at the upper end of the drainage connection pipe 43. At this time, the rod-like member 48 of the flange 28 is inserted into the through hole 77 of the flange lid 78. A space between the rod-shaped member 48 and the inner peripheral surface of the through hole 77 is sealed with a sealing material such as an O-ring.

  Then, the on-off valve 2 on the upstream side is opened, and the water 22 in the water pipe 1 is passed from the on-off valve 2 to the drainage pipe 44, and the ruptured cleaning ball 22 is put on the retaining plate 49 a of the basin 28. The hook is pulled up from the water pipe 1 to the upper end opening of the drainage connection pipe 43. At this time, since the cleaning ball 22 is pushed up by the water pressure P from below, the cleaning ball 22 can be easily pulled up using the heel 28.

  (16) Thereafter, the on-off valve 2 is closed to cut off the water to be cleaned 17, and the flange lid 78 is removed from the drainage connection pipe 43 as shown in FIG. 19, and the ruptured cleaning ball 22 is removed from the drainage connection pipe 43. Take it out from the top opening and collect it. Thereby, the cleaning operation of the water pipe 1 is completed.

  As described above, after the cleaning ball 22 is ruptured by the scissors 28, the scissors 28 are used to connect the cleaning balls 22 to the branch pipe 8, the repair valve 10, the connection short pipe 24, and the drainage connection pipe 43. Therefore, even when there is a large difference between the inner diameter of the water pipe 1 and the inner diameter of the branch pipe 8 which is smaller than that, the cleaning ball 22 is easily taken out from the drainage connection pipe 43 through the branch pipe 8. It can be recovered.

  Further, when the cleaning ball 22 is pulled out from the drainage connection pipe 43 using the rod 28, the cleaning ball 22 is pushed out by the water pressure P as shown in FIG. It is possible to take it out.

  Further, as shown in FIG. 14, the cleaning balls 22 are captured by the capturing jig 27, thereby preventing the cleaning balls 22 from passing under the branch pipe 8 on the arrival side from the upstream side to the downstream side. Therefore, the cleaning ball 22 can be reliably recovered from the branch pipe 8 on the arrival side.

  If the cleaning ball 22 ruptures in the middle of the cleaning target section 17 before reaching the branch pipe 8 on the arrival side, as shown in FIG. By actuating and winding the recovery rope 38, the cleaning ball 22 can be pulled back to the branching pipe 7 on the start side and recovered from the connecting short pipe 23.

After completion of the cleaning operation, the emergency ball collecting means 25, the drainage means 26, and the connecting short pipes 23 and 24 are removed, and the fire hydrants 11 and 12 and the lids 15 and 16 are attached as shown in FIG.
(Second Embodiment)
First, a second embodiment will be described with reference to FIGS.

  In the second embodiment, when performing the method of cleaning the water pipe 1 described in the first embodiment, first, the communicating portion between the water pipe 1 and the branch pipe 8 in the arrival-side branch pipe 8 and first. The rust-like rust 82 adhering to 81 (joining part) is removed by the rust removing jigs 83 and 84.

  As shown in FIG. 20, the first rust removing jig 83 includes a pipe 85, a plurality of rotary blades 86 rotatably provided at the tip of the pipe 85, and a rotation drive device that rotationally drives the rotary blades 86. (Not shown). The rotating blades 86 are made of metal and are provided radially when viewed from the direction of the rotation axis.

  As shown in FIG. 21, the second rust removing jig 84 includes a pipe 88, a rotating body 89 that is rotatably provided at the tip of the pipe 88, and a rotation drive device that rotates the rotating body 89 (illustrated). And a plurality of chains 90 provided on the rotating body 89, and a metal hammer 91 attached to the tip of the chain 90.

Hereinafter, a method for cleaning the water pipe 1 using the first and second rust removing jigs 83 and 84 will be described.
(1) First, both the on-off valves 2 and 3 are closed, and the cleaning target section 17 is brought into a water shut-off state (a state where the flow is shut off). Thereafter, the lids 15 and 16 are removed, and the fire hydrants 11 and 12 are removed from the repair valves 9 and 10. At this time, both repair valves 9 and 10 are left open.

  As shown in FIG. 20, the first rust removing jig 83 is inserted into the branch pipe 8 from the repair valve 10 on the arrival side, and the rotary blade 86 is rotated to rust 82 in the branch pipe 8 on the arrival side. Is removed by the rotary blade 86. After the removal, the first rust removing jig 83 is removed upward from the branch pipe 8, and the second rust removing jig 84 is branched from the repair valve 10 on the arrival side as shown in FIG. It inserts in the water pipe 1 through the pipe | tube 8, and the rotary body 89 is rotated. As a result, the hammer 91 rotates together with the chain 90, and the hammer 91 removes the rust 82 in the arc-shaped (R) communication portion 81 between the water pipe 1 and the branch pipe 8.

  Thereafter, the second rust removing jig 84 is removed upward from the branch pipe 8, and as shown in FIG. 8, the connecting short pipe 23 is connected to the upper end of the repair valve 9 on the start side, A connecting short pipe 24 is connected to the upper end of the repair valve 10. Thereafter, the cleaning methods (2) to (16) described in the first embodiment may be performed. Thus, when the water pipe 1 is cleaned, the cleaning balls 22 can be reliably recovered by removing the rust 82 in advance.

  In the second embodiment, the rust 82 in the branch pipe 8 is removed using the first rust removing jig 83 and then branched from the water pipe 1 using the second rust removing jig 84. The rust 82 in the communicating portion 81 with the pipe 8 is removed. First, the rust 82 is removed using the second rust removing jig 84 and then the first rust removing jig 83 is used. Rust 82 may be removed. Further, the rust 82 may be removed using only one of the first and second rust removing jigs 83 and 84.

  In the said 1st and 2nd embodiment, although the water pipe 1 was mentioned as an example of a main pipe, it is not limited to the water pipe 1, For example, a sewer pipe etc. may be sufficient. Moreover, although the water W was mentioned as an example of the fluid, it is not limited to the water W.

  In the said 1st and 2nd embodiment, although the water pipe 1 is wash | cleaned using the branch pipes 7 and 8 for fire hydrants, it is not limited to a fire hydrant, For example, the branch for air pipes You may wash | clean using a pipe | tube, the branch pipe for various repairs, etc.

1 water pipe (main pipe)
7 Start-side branch pipe 8 Arrival-side branch pipe 22 Cleaning ball (cleaning member)
28 銛 (Recovery jig)
48 Bar-like part 49 Puncture part 49a Hanging claw (hanging part)
P Water pressure (fluid pressure)
W Water (fluid)

Claims (4)

Insert an expandable / contractible cleaning member having a hollow portion inside into a main pipe from an upstream start side branch pipe in a reduced state,
In the main pipe, the fluid is injected into the hollow portion of the cleaning member to expand the cleaning member,
The inner surface of the main pipe is cleaned with the cleaning member by flowing the fluid into the main pipe and transferring the cleaning member,
When the cleaning member recognizes that the cleaning member reaches the downstream reaching branch pipe and is captured by the capturing jig provided in advance on the reaching branch pipe, the main pipe is in a water-stopped state. After removing the capture jig from the arrival side branch pipe, insert the recovery jig into the arrival side branch pipe,
The cleaning member is pierced and ruptured with a recovery jig,
A method for cleaning an inner surface of a pipe, wherein the recovery member is pulled out from the main pipe through the arrival side branch pipe by removing the recovery jig from the arrival side branch pipe. After the cleaning member is ruptured with the recovery jig, the inside of the main pipe is put into water,
2. The method for cleaning an inner surface of a pipe according to claim 1, wherein the cleaning member drawn out from the main pipe into the arrival side branch pipe is pushed out by fluid pressure. The pipe inner surface cleaning method according to claim 1 or 2, wherein a scissors is used as the recovery jig . A recovery jig used in the pipe inner surface cleaning method according to any one of claims 1 to 3,
A rod-like portion that can be inserted into and removed from the reaching-side branch pipe, and a piercing portion that is provided at the tip of the rod-like portion and pierces the cleaning member;
A recovery jig, wherein a hooking portion for hooking a ruptured cleaning member is formed on the piercing portion.

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