JP2012096197A - Method for cleaning inside surface of pipe and crushing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cleaning the inside surface of a pipe which enables secure recovering of a cleaning member from inside a branched pipe of the reaching side.SOLUTION: A cleaning ball 22, as reduced in size, is inserted into a water service pipe 1 from inside a branched pipe 31 of the upstream cleaning start side, then the cleaning ball 22 is dilated inside the water service pipe 1, and the inside surface of the water service pipe 1 is cleaned by transferring the cleaning ball 22 through letting water flow through the interior of the water service pipe 1. When the cleaning ball 22 reaches the branched pipe 31 of the downstream reaching side, the cleaning ball 22 is made to reduce its size and drawn into the branched pipe 31 of the reaching side from the inside of the water service pipe 1. After these procedures, a crushing tool 29 is inserted into the branched pipe 31 of the reaching side to crush the cleaning ball 22, and the crushed cleaning ball 22 remaining inside the branched pipe 31 of the reaching side is pushed out with the help of the internal water pressure P of the water service pipe 1.

Description

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

  Conventionally, with respect to this type of pipe inner surface cleaning method, for example, as shown in FIG. 25, 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 region of the water pipe 101 is closed. 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 inner surface of the water pipe 101 is washed with the washing pig 105 while the washing pig 105 is transferred to the downstream side in the water pipe 101, and after washing, the washing pig 105 is branched downstream to the arrival side. A cleaning method for recovering from the inside of the tube 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, The diameter of the pipe expands when it is inserted into the water pipe 101 from the start side branch pipe 106 and is reduced when it is taken into the arrival side branch pipe 107 from the water pipe 101.

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. Therefore, the cleaning pig 105 having a reduced diameter is clogged in the middle of the arrival side branch pipe 107, and the cleaning pig 105 (cleaning member) cannot be recovered from the arrival side branch pipe 107. Arise.

  An object of the present invention is to provide a pipe inner surface cleaning method and a crushing tool capable of reliably recovering a cleaning member from the 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 of the expandable / contractable cleaning member,
The cleaning member is expanded in the main,
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 reaches the downstream reaching branch pipe, the cleaning member is reduced and taken from the main pipe into the reaching branch pipe,
Insert the crushing tool into the branch pipe on the arrival side, crush the cleaning member with the crushing tool,
The cleaning member in the arrival side branch pipe is pushed out by utilizing the fluid pressure in the main pipe.

  According to this, the volume of the cleaning member is reduced by crushing the reduced cleaning member with the crushing tool, and the cleaning member is pushed out by the fluid pressure in the main pipe. As a result, the cleaning member can be reliably recovered from the arrival side branch pipe.

In the method for cleaning the inner surface of the pipe according to the second invention, when the cleaning member reaches the downstream reaching branch pipe, the recovery tool is inserted into the reaching branch pipe, and the cleaning member is ruptured by the recovery tool. Shrink,
If the cleaning member is clogged in the arrival side branch pipe when the cleaning member is taken out from the main pipe into the arrival side branch pipe using the recovery tool, the recovery tool is removed from the arrival side branch pipe. The crushing tool is inserted into the arrival side branch pipe.

  According to this, when pulling out the ruptured cleaning member using the recovery tool, even when the cleaning member is clogged in the arrival side branch pipe, by crushing the cleaning member using the crushing tool, The cleaning member can be reliably recovered from the arrival side branch pipe.

The third invention is a crushing tool used in the pipe inner surface cleaning method according to the first invention or the second invention,
It has a rod-like member that can be inserted into and removed from the reaching-side branch pipe, and a rotatable crushing head provided at the tip of the rod-like member.

  According to this, the cleaning member is crushed by the crushing head by inserting the rod-like member of the crushing tool into the arrival side branch pipe and rotating the crushing head.

  As described above, according to the present invention, even when the cleaning member is clogged in the arrival side branch pipe, the cleaning member is reliably recovered from the arrival side branch pipe by crushing the cleaning member using the crushing tool. be able to.

It is a figure of a water pipe and its incidental equipment in an embodiment of the 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 figure of the crushing tool used for the washing | cleaning in a water pipe, (a) is a front view, (b) is an enlarged view of the XX arrow in (a). 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 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 sectional drawing of the flange cover used for the washing | cleaning in a water pipe. It is a figure which shows the washing | cleaning method in a water pipe same as the above, and shows the state with which the ball | bowl for washing | cleaning was clogged. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which collect | recovered soot. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of inserting the crushing tool. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of crushing the washing | cleaning ball | bowl with the crushing tool. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which pushes up the ball | bowl for washing | cleaning using water pressure. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which collect | recovered the ball | bowl for washing | cleaning and the tool for crushing. 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.
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 longitudinal 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 longitudinal 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 vertical 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. A catching jig 27 for catching the cleaning ball 22 in the water pipe 1, a trough 28 for bursting and collecting the captured cleaning ball 22 (see FIG. 4 as an example of a recovery tool), And a crushing tool 29 (see FIG. 7) for crushing the cleaned ball 22.

  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.

  As shown in FIG. 2, the starting short connecting pipe 23 is detachable from the upper end of the starting repair valve 9, and the starting vertical pipe 7, the repair valve 9, and the connecting short pipe 23 are used to start the branch pipe. 30 is configured. Further, the connecting short tube 24 on the reaching side is detachable from the upper end of the repair valve 10 on the reaching side.

  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 connecting pipe 43 is a T-shaped pipe, and the reaching-side branch pipe 31 is configured by the reaching-side vertical pipe 8, the repair valve 10, the connection short pipe 24, and the drainage connecting pipe 43.

  As shown in FIGS. 4 and 16, the rod 28 has a rod-like member 48 that can be inserted into and removed from the reaching-side branch pipe 31, and a piercing portion 49 that is provided at the tip of the rod-like member 48 and has a sharp tip. is doing. 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.

The capturing jig 27 has the following configuration.
As shown in FIGS. 5 and 6, the catching jig 27 has a mounting flange 51 detachably attached to 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 reaching-side branch pipe 31, 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 vertical tube 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.

  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 A. 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 holding member 65 is screwed into the female screw formed on the through hole 52 of the mounting flange 51 and the holding 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 vertical tube 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.

  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 includes 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 that fixes the main body 72 to the pipe member 53.

  As shown in FIG. 7, the crushing tool 29 includes a rod-shaped member 29a that can be inserted into and removed from above in the arrival side branch pipe 31, a rotatable crushing head 29b provided at the tip of the rod-shaped member 29a, and a crushing head. And a drive device (not shown) for rotating and driving 29b.

  On the outer periphery of the crushing head 29b, a plurality of concave portions 29c and convex portions 29d are alternately formed, and a plurality of projecting members 29e that protrude outward in the axial direction from the crushing head 29b are provided. In addition, the cross-sectional shape of the protruding member 29e is formed in a triangular shape at a portion protruding from the end face of the crushing head 29b.

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), Insert from the start side branch pipe 30 into the water pipe 1.

  (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 attachment flange 51 is inserted into the arrival side branch pipe 31 from the upper end opening of the connection pipe 43, and the upper flange 43 a of the drain connection pipe 43 is joined.

  (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 vertical tube 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 vertical pipe 8 on the arrival side 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. Accordingly, 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 arrival side branch pipe 31. 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 on-off valve 2 through the cleaning target section 17 of the water pipe 1 and is drained to the drainage pipe 44 through the arrival side branch pipe 31. 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 reaching vertical tube 8. 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 vertical tube 8, whereby the movable member 50 can be prevented from changing in the radial direction of the vertical tube 8.
Further, as shown in FIG. 14, the movable member 50 is lifted by 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 visually confirms the gap 75 to recognize (confirm) that the cleaning ball 22 has reached the lower side of the vertical tube 8 and has been captured by the capturing jig 27. be able to.

  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 vertical tube 8 on the arrival side, and stops water. Thereby, it is possible to prevent a part of the cleaning ball 22 from entering the vertical tube 8. If a part of the cleaning ball 22 enters the vertical pipe 8, the cleaning ball 22 may be inadvertently ruptured 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. 15, 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 pulled out from the arrival side branch pipe 31 and removed.

(14) As shown in FIG. 16, the heel 28 is inserted into the arrival side branch pipe 31 from above, and the cleaning ball 22 is pierced and ruptured at the tip of the piercing portion 49 of the heel 28 to reduce the size.
(15) As shown in FIG. 17, 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, as shown in FIG. 18, the rod-shaped member 48 of the flange 28 is inserted into the through hole 77 of the flange lid 78. The 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 79, and the O-ring 79 is pressed and compressed by a pressing member 80 screwed into the flange lid 78. ing. Note that the rod-shaped member 48 is movable in the axial direction (vertical direction) with respect to the flange lid 78.

  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. Hook it up into the vertical pipe 8 from the water pipe 1 and pull it up.

  (16) At this time, as shown in FIG. 19, when the cleaning ball 22 is clogged in the lower end opening of the vertical tube 8, the basket 28 is pulled up and separated from the cleaning ball 22, and as shown in FIG. 20, The flange lid 78 is removed from the flange 43a of the drainage connection pipe 43, and the trough 28 is removed from the arrival side branch pipe 31 and collected. When the cleaning ball 22 is clogged in the lower end opening of the vertical pipe 8 as described above, the water pressure P (an example of fluid pressure) in the water pipe 1 acting on the lower part of the cleaning ball 22 is used for cleaning. The ball 22 is pressed upward.

  (17) Then, as shown in FIG. 21, the crushing tool 29 is inserted into the reaching side branch pipe 31 from above. At this time, the flange lid 78 is attached to the flange 43a of the drainage connection pipe 43, and the rod-shaped member 29a of the crushing tool 29 is inserted into the through hole 77 of the flange lid 78 as shown in FIG. A space between the rod-shaped member 29a and the inner peripheral surface of the through hole 77 is sealed with a sealing material such as an O-ring 79.

  (18) Then, as shown in FIG. 22, the crushing head 29b is rotated, and the cleaning balls 22 are scraped off and crushed by the crushing head 29b. As a result, the volume of the cleaning ball 22 is reduced, and the cleaning ball 22 is pushed up from below by the water pressure P in the water pipe 1, as shown in FIG. That is, it rises to (that is, the upper end portion in the drainage connection pipe 43). At this time, the crushing tool 29 is pulled up as the cleaning ball 22 rises.

  (19) 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 drain connection pipe 43 as shown in FIG. 24 to drain the crushing tool 29 and the cleaning ball 22. Taking out and collecting from the upper end opening of the connecting pipe 43 for use, the cleaning operation of the water pipe 1 is completed. As a result, the cleaning ball 22 can be reliably recovered from the arrival side branch pipe 31.

  If the cleaning ball 22 ruptures in the middle of the cleaning target section 17 before reaching the longitudinal tube 8 during the cleaning operation, as shown in FIG. By actuating the 25 reels 41 and winding the recovery rope 38, the cleaning ball 22 can be pulled back to the start side vertical tube 7 and recovered from the start side branch tube 30.

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.
In the above embodiment, as shown in FIG. 21, when the cleaning ball 22 is clogged in the lower end opening of the vertical tube 8, the cleaning ball 22 is crushed using the crushing tool 29. If the repair valve 10 or the connecting short pipe 24 or the drainage connecting pipe 43 constituting the arrival side branch pipe 31 is clogged, the crushing tool 29 is used for cleaning. The ball 22 may be crushed.

In the above embodiment, the cleaning ball 22 is reduced by rupturing, but the cleaning ball 22 may be reduced by discharging the water 37 in the cleaning ball 22.
In the said 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 above embodiment, the water pipe 1 is cleaned using the vertical pipes 7 and 8 for the fire hydrant, but is not limited to the fire hydrant. For example, the branch pipe for the air pipe and various repair pipes are used. You may wash | clean using a branch pipe etc.

1 water pipe (main pipe)
22 Cleaning balls (cleaning materials)
28 銛 (Recovery tool)
29 Crushing tool 29a Bar-shaped member 29b Crushing head 30 Start side branch pipe 31 Arrival side branch pipe P Water pressure (fluid pressure)
W Water (fluid)

Claims (3)

Insert the cleaning member that can be expanded and contracted into the main pipe from the upstream start side branch pipe in a reduced state,
The cleaning member is expanded in the main,
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 reaches the downstream reaching branch pipe, the cleaning member is reduced and taken from the main pipe into the reaching branch pipe,
Insert the crushing tool into the branch pipe on the arrival side, crush the cleaning member with the crushing tool,
A method for cleaning an inner surface of a pipe, wherein the cleaning member in the reaching branch pipe is pushed out by utilizing the fluid pressure in the main pipe. When the cleaning member reaches the downstream-side reaching branch pipe, the recovery tool is inserted into the reaching-side branch pipe, and the cleaning member is ruptured with the recovery tool and reduced.
If the cleaning member is clogged in the arrival side branch pipe when the cleaning member is taken out from the main pipe into the arrival side branch pipe using the recovery tool, the recovery tool is removed from the arrival side branch pipe. 2. The pipe inner surface cleaning method according to claim 1, wherein a crushing tool is inserted into the reaching side branch pipe. A crushing tool used in the pipe inner surface cleaning method according to claim 1 or 2,
A crushing tool comprising: a rod-shaped member that can be inserted into and removed from a reaching-side branch pipe; and a rotatable crushing head provided at a tip of the rod-shaped member.

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