JP2009189910A - Method for cleaning inside of pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for cleaning the inside of a pipe in which states before and after cleaning of the inside of the pipe can be visually confirmed and in which a sediment left in the lower part of a vertical pipe part can be recovered by properly cleaning it by a pig. <P>SOLUTION: In the method, the flowing processes are carried out: the process of removing a rust lump stuck to the inside of the vertical pipe part T with constantly flowing water; the process of examining the inside of the pipe 1 by inserting an endoscope into the inside of the pipe 1 constituting a pipe net with constantly flowing water; the process of forming a moving route of the pig P by operating a valve V arranged in the pipe net; the process of moving the pig P from a launcher 161 installed at the vertical pipe part of one end part of the moving route toward a catcher 163 installed at the vertical pipe part of the other end part of the moving route; the process of recovering the sediment left in the lower part of the vertical pipe part T6 of the outlet side of the pig P to the outside of the pipe from the vertical pipe part T6; and the process of examining the inside of the pipe after cleaning by the endoscope. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for cleaning the inside of a pipe, and particularly to a method for cleaning the inside of a water supply pipe.

There is a risk that water quality will deteriorate due to accumulation of sediment in the water supply pipe.
Therefore, in recent years, the pipe is cleaned with a pig for the purpose of removing deposits in the pipe. The pig is a member that can be expanded and contracted, is fed into the pipe from one of the separated vertical pipe sections, travels inside the pipe by water pressure or the like, and discharges deposits from the other vertical pipe section to the outside.
Thus, the deterioration of water quality is prevented by the deposit accumulated in the pipe being discharged to the outside.

However, pigs have a wide variety of shapes and sizes, and which pigs are used for cleaning must be based on the experience of the operator. Also, the number of times the pigs traveled was based on experience. Therefore, there may be a case where a pig that is not suitable for traveling in the pipe is used, and it may not be said that the cleaning has been sufficiently performed.
In addition, in the case of cleaning with a conventional pig, it was not confirmed whether or not the deposits in the pipe were completely recovered after the cleaning was completed, and it was not possible to visually determine whether the cleaning was sufficient. .
Further, in the case of cleaning with a pig, the deposit may remain at a position below the vertical pipe portion that discharges the deposit to the outside, and this deposit is not collected but flows into the pipe.

  The problem to be solved by the present invention is to provide a method that makes it possible to visually recognize the situation before and after cleaning in the pipe, and to accurately perform the cleaning by the pig and to collect the deposits remaining in the lower position of the vertical pipe portion. There is.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is characterized in that, among the tubes constituting the tube network, the endoscope is provided with unrestricted water in the tube serving as the travel path of the pig. A first step of inserting and investigating the inside of the pipe, a second step of operating a valve disposed in the pipe network to cut off a part of the pipe network to make a pig travel path, and one end of the travel path The third step of running the pig from the launcher provided in the vertical pipe part of the part toward the catcher provided in the vertical pipe part of the other end of the travel path, and the lower part of the vertical pipe part on the exit side of the pig This is an in-pipe cleaning method that sequentially includes a fourth step of collecting the accumulated sediment from the vertical pipe portion to the outside of the pipe and a fifth step of examining the inside of the pipe constituting the travel path with an endoscope.

  The invention according to claim 2 is a step of confirming the water shutoff by an endoscope inserted into a pipe from a vertical pipe portion provided in the middle of the traveling route after the second step and before the third step. The pipe cleaning method according to claim 1, further comprising:

  According to a third aspect of the present invention, after the second step and before the third step, a flow rate sensor or a water pressure sensor is inserted into a pipe from a vertical pipe portion provided in the middle of the travel route to confirm the water cutoff. The in-pipe cleaning method according to claim 1, further comprising the step of:

  The invention according to claim 4 further includes a step of removing rust humps adhering to the inside of the vertical pipe portion on the traveling path with unrestricted water immediately before or immediately after the first step. The pipe cleaning method according to claim 3.

  According to the fifth aspect of the present invention, immediately after the third step, the cleaning condition in the pipe is confirmed by an endoscope inserted into the pipe from the vertical pipe portion provided in the middle of the travel route, The pipe cleaning method according to any one of claims 1 to 4, wherein the process is repeated or the process proceeds to a fourth process.

  The invention according to claim 6 is an apparatus used for cleaning the inside of the pipe, and is a cylindrical main body installed in a watertight state on the upper part of the vertical pipe portion branched upward from the horizontal pipe portion, A cylindrical guide member that is inserted in a watertight state so as to be able to advance and retreat, and has a drain pipe that can communicate inside and outside above the main body, and is attached to the lower end of the guide member, and collects deposits in the pipe to collect the guide. And a bellows-like hose that is discharged from the drain pipe of the member to the outside.

  According to a seventh aspect of the present invention, an endoscope cable is inserted into the guide member so as to be able to advance and retreat in a watertight state, and is introduced into the hose. It is arrange | positioned, It is the collection | recovery apparatus of Claim 6.

  The invention according to claim 8 is characterized in that a member for defining the bending direction of the hose is attached in the hose along the axial direction in a part of the circumferential direction. 7. The collection device according to 7.

  Furthermore, the invention according to claim 9 is the recovery device according to claim 8, wherein the member that defines the bending direction of the hose is a leaf spring.

  According to the pipe cleaning method of the present invention, it is possible to visually check the situation before and after cleaning in the pipe, and it is possible to accurately perform cleaning with a pig, and it is also possible to collect deposits remaining below the vertical pipe portion.

Hereinafter, the pipe cleaning method of the present invention will be described in detail with reference to the drawings.
The in-pipe cleaning method of this embodiment is used to clean the inside of a water supply water pipe that supplies water to each home or factory.

  FIG. 1 is a plan view showing a pipe network in which the pipe cleaning method of the present invention is used. FIG. 2 is a front view showing a vertical pipe portion provided in the pipe network of FIG. 1, and a part thereof is shown in cross section.

  In order to supply water to each home or factory, as shown in FIG. 1, a large number of pipes (horizontal pipes) 1, 1,... Are connected to form a pipe network, which is buried in the ground. Various types of valves V (V1, V2,...) Such as gate valves and butterfly valves are appropriately provided in the pipe network, and a part of the pipe network can be cut off (section water cut off). Further, the pipe network is appropriately provided with vertical pipe portions T (T1, T2,...) Branched upward. Specifically, as shown in FIG. 2, the horizontal pipes 1, 1,... Constituting the pipe network are appropriately provided with a vertical pipe 3 that branches upward. For example, a fire hydrant H is connected through a repair valve 11 or the like to form a vertical pipe portion T. In the illustrated example, the fire hydrant H, the repair valve 11 and the like constituting the vertical pipe portion T are accommodated in a box formed underground.

In the present embodiment, the inside of the pipe is cleaned from the vertical pipe portion T.
The in-pipe cleaning method of the present embodiment includes investigation of the inside of the tube by an endoscope, collection of deposits in the tube by a pig, and collection of deposits in the tube by a collection device, and each step is sequentially performed.

  Moreover, when the pipe cleaning method of a present Example is used, the driving | running route of a pig is assumed beforehand. Below, the case where the driving | running route shown with a dotted line in FIG. 1 is assumed is demonstrated. In this case, it is assumed that a pig is put in from the vertical tube portion T1 and a pig is taken out from the vertical tube portion T6. 1 is isolated from the others by closing the valves V1, V3, V4, V7, and V9 and performing section water cutoff.

  In this embodiment, first, before this section water cut is performed, an in-pipe investigation is performed from the vertical pipe portion T on the travel route with the uninterrupted water. An endoscopic inserter 9 as shown in FIG. 3 is used for a method of investigating (monitoring) the situation in the pipe from the vertical pipe portion T with the continuous water.

FIG. 3 is a front longitudinal sectional view showing a state in which the endoscope inserter of the present embodiment is attached to the vertical pipe portion.
FIG. 4 is a longitudinal sectional view in front view showing a state in which the guide member provided with the endoscope holder is attached to the main body.
In the following description, up, down, left, and right are defined in the state shown in FIG. 3, and a direction perpendicular to the paper surface is a front-back direction.

  In this embodiment, in FIG. 1, an endoscope inserter 9 is attached to the longitudinal tube portion T1 which is the entrance side of the pig P and the longitudinal tube portion T6 which is the exit side of the pig P, respectively, and the inside of the tube is investigated. Is called. Further, in this embodiment, the endoscope inserter 9 is attached between the longitudinal tube portions T1 and T6 and also on the longitudinal tube portion on the traveling path of the pig P, and the inside of the tube is investigated. For example, the endoscope inserter 9 is attached to the vertical tube portion T4 in FIG. Thus, in this embodiment, the endoscope inserters 9 are attached to three locations on the traveling route of the pig P.

  In this embodiment, as shown in FIG. 3, the fire hydrant H is removed from the repair valve 11, and the endoscope inserter 9 is attached to the repair valve 11. Although the repair valve 11 may be a slide type repair valve or the like, in the illustrated example, it is a ball type repair valve 11.

The ball type repair valve 11 includes a valve box 13 and a ball 15 that is rotatably accommodated in the valve box 13. The valve box 13 is formed with flanges 17 and 19 at both upper and lower ends, and the lower flange 19 is connected to the flange 5 at the upper end of the vertical tube 3.
On the other hand, the upper flange 17 of the valve box 13 is normally connected to a fire hydrant H as shown in FIG. 2 before the endoscope inserter 9 of the present embodiment is installed. Further, as shown in FIG. 3, the valve box 13 is provided with a pipe line 21 penetrating in the vertical direction, and a ball 15 is rotatably disposed in the middle of the pipe line 21. A through hole 23 is formed in the diameter direction of the ball 15, and the diameter of the through hole 23 corresponds to the diameter of the conduit 21. With such a configuration, the direction of the through hole 23 of the ball 15 is arranged vertically along the conduit 21 of the valve box 13 by the lever 25 that opens and closes the ball 15 (FIG. 7), or the conduit The repair valve 11 can be opened and closed depending on whether it is arranged in a lateral direction perpendicular to the valve 21 (FIG. 3).

As shown in FIG. 3, the endoscope inserter 9 is attached to the upper flange 17 of the ball type repair valve 11 from which the fire hydrant H has been removed, instead of the fire hydrant H.
The endoscope inserter 9 according to the present embodiment includes a cylindrical main body 27 that is detachably attached to the upper portion of the repair valve 11, and a cylindrical guide member 29 that is inserted into the main body 27 so as to be vertically movable in a watertight state. An endoscope holder 31 detachably provided at the lower end of the guide member 29 is provided in the main part.

The main body 27 has a cylindrical shape, and is attached to the repair valve 11 with the axis line arranged vertically.
Specifically, flanges 33 and 35 are formed at both upper and lower ends of the main body 27 so as to extend radially outward. Further, a drain pipe 39 with an on-off valve 37 is connected to the middle part of the main body 27 in the axial direction and extends horizontally.
In this embodiment, the guide member 29 is inserted into the main body 27 through the water stop portion 41 in a watertight state.

  FIG. 5 is a schematic view showing the water stop portion.

  The water stop portion 41 includes a lid body 43 placed on the upper end portion of the main body 27, a packing 45 provided on the lid body 43, and a packing presser 47 for fixing the packing 45. The lid 43 has a substantially disk shape, is placed on the upper end of the main body 27, and is fixed to the flange 33 of the main body 27 with bolts (not shown). Further, a stepped hole 49 is formed through the central portion of the lid body 43 along the axial direction. Among the stepped holes 49, the packing 45 is accommodated in the upper large-diameter hole 49a.

The packing 45 according to the present embodiment includes a plurality of sealing materials 51. Each sealing material 51 has the same shape and is formed of a synthetic resin. Further, each sealing material 51 is formed in an annular shape with a V-shaped cross section, and the guide member 29 is passed through a hole in the center thereof.
Each sealing material 51 is cut by being obliquely cut at a part in the circumferential direction. By using this cutting, each sealing material 51 can be attached and detached from the outer peripheral surface of the guide member 29. .

Each sealing material 51 is overlapped with its V-shaped opening facing downward. In addition, each of the sealing materials 51 adjacent to the upper and lower sides has the oblique cut direction in the reverse direction.
Specifically, in FIG. 5, the three sealing materials 51A at the upper and lower end portions and the central portion are provided with cuts 51a toward the lower right, and the two sealing materials 51B therebetween are directed toward the upper right. The cut is made. In the illustrated example, the cuts 51a of the three sealing materials 51A at the upper and lower end portions and the central portion and the cuts of the two sealing materials 51B between them are arranged to face each other in the diametrical direction. The notch is not shown in FIG.

And the adapters 53 and 55 are overlapped on the upper and lower end portions of the seal material 51 thus overlapped. The lower adapter 55 has an annular shape having substantially the same diameter as that of the sealing material 51, and has an annular shape with a lower end surface formed in a horizontal plane and an upper end portion protruding upward in a mountain shape.
A V-shaped groove of the lowermost seal material 51 is disposed in the upward projecting portion.
On the other hand, the upper adapter 53 has an annular shape having substantially the same diameter as that of the sealing material 51, and has an upper end surface formed in a horizontal plane, and a lower end portion formed in a circular shape having a cross-sectional shape recessed upward. A V-shaped convex portion of the uppermost sealing material 51 is disposed in the upward concave portion.

In this way, the superposed sealing materials 51, 51,... In which the adapters 53, 55 are arranged above and below are formed into a cylindrical shape as a whole and held in the large-diameter hole 49 a of the lid 43.
Then, a stepped cylindrical packing presser 47 is placed from above the superposed sealing materials 51, 51,... In which the adapters 53, 55 are arranged above and below, and as shown in FIG. The packing presser 47 is fixed with screws 57.
Thereby, the sealing material 51 is positioned and held with respect to the lid body 43.

The guide member 29 has a cylindrical shape and has an outer diameter corresponding to the lower small-diameter hole 49b in the stepped hole 49 of the lid body 43. Further, a drain pipe 61 with an opening / closing valve 59 is connected to the upper end of the guide member 29 so as to extend horizontally. The guide member 29 is inserted into the main body 27 in a watertight state via the water stop portion 41 so as to be able to advance and retract. That is, the guide member 29 is inserted into the main body 27 by being inserted into the central hole of the packing presser 47 and the central hole of the sealing material 51. In this state, the space between the inner peripheral surface of the lid body 43 and the outer peripheral surface of the guide member 29 is maintained in a watertight state, and the guide member 29 can move up and down with respect to the lid body 43 and the main body 27. .
As described above, the guide member 29 is inserted into the stepped hole 49 of the lid body 43 of the water stop portion 41, and can be moved up and down in a watertight state with respect to the main body 27.

  Further, as shown in FIG. 4, a pin hole 63 is formed in the peripheral side wall at the lower end of the guide member 29 so as to penetrate in the front-rear direction. In this embodiment, four pin holes 63 are formed in the peripheral side wall of the guide member 29, and the two pin holes 63 and 63 are arranged coaxially. Further, the pair of pin holes 63A arranged on one coaxial axis and the pair of pin holes 63B arranged on the other coaxial axis are shifted in the left-right direction and are also shifted in the vertical direction. .

FIG. 6 is a perspective view showing the endoscope holder 31 of the present embodiment.
The endoscope holder 31 according to the present embodiment includes an attachment portion 67 that is detachably connected to the lower end portion of the guide member 29, a guide material 69 that is rotatably held by the attachment portion 67, and the guide material 69. A guiding member 71 that is rotatably held is provided in the main part.

  The attachment portion 67 has a cylindrical shape that opens in the vertical direction, and has an inner diameter into which the lower end portion of the guide member 29 is fitted. Further, the front and rear outer surfaces of the attachment portion 67 are notched and formed on a rectangular flat surface 73, respectively.

  Further, the center hole 67a of the attachment portion 67 is a stepped hole having a large diameter on the upper side. As a result, when the guide member 29 is inserted into the attachment portion 67, the lower end portion of the guide member 29 comes into contact with the stepped portion inside the attachment portion 67, whereby the attachment portion 67 is positioned in the vertical direction. In this positioned state, the pin 75 may be inserted into the mounting portion 67 and the guide member 29 as will be described later.

  Further, the cylindrical attachment portion 67 is integrally provided with a leg portion 77 extending downward. In this embodiment, two rod-like leg portions 77 are provided on the left side of the attachment portion 67 so as to be separated from each other in the front-rear direction. The inner and outer surfaces of the leg portion 77 are continuous with the inner and outer surfaces of the attachment portion 67.

  Furthermore, four pin holes 79 are formed in the attachment portion 67 so as to penetrate along the front-rear direction. Each pin hole 79 is formed at a position corresponding to each pin hole 63 of the guide member 29 when the lower end portion of the guide member 29 is fitted into the mounting portion 67.

  The guide member 69 has a substantially semicircular cross section and is elongated, in other words, is formed in a groove shape having a semicircular cross section. And the front-end | tip part 81 of the guide material 69 is formed in the substantially spherical shape of a quarter, and is formed so that a width | variety may become thin as it goes to a front end side. Specifically, the tip portion 81 of the guide material 69 is formed in the tip shape of a spoon.

  Moreover, the longitudinal center part of the both ends of the opening of the guide material 69 is formed in a gentle arc shape. The recess 83 is formed so that the guide material 69 does not come into contact with the bent portions of the vertical tube 3 and the horizontal tube 1 when the guide material 69 enters the horizontal tube (water pipe) 1 from the vertical tube portion T. Yes. This is particularly effective for the water distribution pipe 1 having a small pipe diameter.

  Further, an elongated through hole 85 is formed in the center portion in the longitudinal direction of the guide material 69 along the longitudinal direction in the center portion in the width direction. As will be described later in FIG. 4, the through-hole 85 is formed so that the cylindrical portion 103 of the guide material 71 is rotatably arranged and a part of the guide material 71 does not hit the guide material 69. Further, the water in the water distribution pipe 1 is formed in order to reduce the water pressure applied to the guide material 69 by passing through the through hole 85.

  The base end portion of the guide material 69 is formed in a trifurcated shape. Among the three crotch portions, the central piece 87 is formed longer to the base end side than the respective side pieces 89 and 89 sandwiching the central piece 87, and a cylindrical portion 91 whose axis is along the front-rear direction is formed at the end portion. Has been. The width dimension (front-rear dimension) of the central piece 87 is slightly smaller than the dimension between the leg portions 77 of the mounting portion 67.

  The end portions 89a and 89a of the side pieces 89 and 89 are formed so as to incline upward from the right side to the left side. In addition, the outer surfaces of the side pieces 89 and 89 are formed into flat surfaces by cutting the curved surfaces. A band-shaped reinforcing material (not shown) that is curved along the width direction is fixed to the outer peripheral surface of the base portion of the trifurcated portion by welding.

  The guide member 69 is rotatably attached to the attachment portion 67 so that the groove-shaped opening surface faces the right side in a state where the longitudinal direction of the guide member 69 is substantially along the vertical direction. In the present embodiment, a pin 93 is provided along the front-rear direction so as to bridge between the leg portions 77, 77 at the upper end portion of the leg portions 77, 77 of the attachment portion 67. Then, as shown in FIG. 4, when the pin 93 is passed through the cylindrical portion 91 of the guide material 69, the guide material 69 rotates around the base end portion, that is, around the pin 93 to the attachment portion 67. Held possible. Here, the state in which the guide material 69 is held by the attachment portion 67 and is suspended in the air is in a suspended state, the longitudinal direction thereof is substantially along the vertical direction, and the groove-shaped opening surface is directed to the right side. ing. In addition, the outer peripheral surface of the guide member 69 is in contact with the leg portion 77 in a suspended state. Thereby, the guide material 69 cannot rotate leftward from the suspended state.

  A long and narrow plate-shaped connecting member 95 is provided so as to connect the side pieces 89 and 89 at the base end portion of the guide member 69 and the mounting portion 67. One end portion of the connecting member 95 is rotatably attached to the flat surface 73 of the attachment portion 67 with a screw 97. Further, a long hole 99 extending along the longitudinal direction is formed through the other end portion of the connecting member 95.

  The other end of the connecting member 95 is superimposed on the flat outer surface of the side pieces 89 and 89 of the guide member 69, and the side pieces 89 and 89 of the guide member 69 are inserted through the long holes 99. Screw 101 is screwed into The screw 101 screwed into the side piece 89 is movable along the long hole 99. As described above, the connecting members 95 are disposed at both ends in the radial direction of the mounting portion 67 and are provided so as to sandwich the guide member 69 therebetween. When the guide material 69 hangs down, the screw 101 is disposed at the lower end portion of the elongated hole 99, and when the guide material 69 rotates around the proximal end portion (FIG. 6), the screw 101 is elongated at the elongated hole 99. It is arranged at the upper end part.

  The guide material 71 of the present embodiment has a shape in which a round bar is curved in a bow shape. A cylindrical portion 103 that opens in the front-rear direction is integrally provided at the proximal end portion of the guide material 71. The longitudinal dimension (thickness) of the cylindrical portion 103 is slightly smaller than the width of the through hole 85 of the guide material 69. The round bar 105 is inserted into the through hole 85 on the outer peripheral surface side of the guide member 69 in a state where the round bar 105 is passed through the tube part 103 and the cylindrical portion 103 is disposed in the through hole 85 of the guide member 69. Is fixed by welding so as to cross in the width direction (front-rear direction). Thereby, the guide material 71 is held by the guide material 69 so as to be rotatable around the base end portion with respect to the guide material 69. At this time, the guide material 71 is attached to the guide material 69 so that the tip portion 71a faces leftward in a suspended state, and the tip portion 71a of the guide material 71 is directed in a direction opposite to the tip portion 81 of the guide material 69. ing. Further, the cylindrical portion 103 is arranged in the through hole 85 of the guide material 69, so that the cylindrical portion 103 is restricted from moving back and forth with respect to the round bar 105, and as a result, the guiding material 71 is restricted from moving back and forth.

  When the guide member 71 is in a suspended state, the tip end portion 71a extends downward from the leg portion 77 and the tip end of the suspended guide member 69. Further, when the guide member 71 rotates around the base end portion, the distal end portion 71 a is configured to pass between the leg portions 77 and 77 of the attachment portion 67.

  The endoscope holder 31 of this embodiment is fixed to the guide member 29 by a pin 75 with the lower end portion of the guide member 29 fitted into the mounting portion 67 thereof. Specifically, the lower end portion of the guide member 29 is fitted into the attachment portion 67, and the pin hole 79 of the attachment portion 67 and the pin hole 63 of the guide member 29 are positioned in the circumferential direction so as to coincide with the front-rear direction, A round bar-like pin 75 is inserted into each of the pin holes 79 and 63 along the front-rear direction.

  An annular groove 107 is formed at one end portion of the pin 75 along the circumferential direction, and a flange portion 109 is formed at the other end portion so as to protrude radially outward. In a state where the pin 75 is fitted into the attachment portion 67 and the guide member 29, the annular groove 107 of the pin 75 is disposed slightly outside the outer peripheral surface of the attachment portion 67. Then, when the locking member 111 is fitted into the annular groove 107 of the pin 75 along the outer peripheral surface of the mounting portion 67, the axial movement of the pin 75 is restricted by the flange portion 109 and the locking member 111. The guide member 29 is fixed to the portion 67. In this embodiment, an E-ring is used as the locking member 111.

  Thus, the endoscope holder 31 provided in the guide member 29 is accommodated in the main body 27 and pulled up to the upper end of the main body 27 as shown in FIG. It does not extend downward from the main body 27.

  By the way, an endoscope main body S on which a camera is mounted is arranged in advance on the guide material 69 of the endoscope holder 31 attached to the guide member 29 with its head facing downward. In the present embodiment, the endoscope main body S is disposed at the center in the longitudinal direction of the guide material 69 and is disposed at a position where the through hole 85 is hidden.

  In the present embodiment, in a state where the endoscope main body S is disposed at the center in the longitudinal direction of the guide material 69, the endoscope main body S is not further lifted upward with respect to the guide material 69. The substantially U-shaped locking tool 113 is fixed to the guide material 69.

The cable C of the endoscope is introduced into the guide member 29 via a water stop portion 115 provided at the upper end portion of the guide member 29.
In this embodiment, a flange 117 is formed on the upper end portion of the guide member 29 so as to extend radially outward, and the water stop portion 115 is placed on and fixed to the upper end portion of the guide member 29.

The water stop portion 115 includes a lid body 119 placed on the upper end portion of the guide member 29, a packing 121 provided on the lid body 119, and a packing presser 123 for positioning and fixing the packing 121. Since it is the same structure as the water stop part 41 provided in the upper end part, it abbreviate | omits for details.
The cable C of the endoscope is inserted into the center hole of the packing presser 123 and the center hole of the sealing material 125 constituting the packing, and is introduced into the guide member 29. In this state, the space between the inner peripheral surface of the lid 119 and the outer peripheral surface of the cable C of the endoscope is maintained in a watertight state, and the cable C can move up and down with respect to the lid 119 and the guide member 29. It is said.

Note that the cable C of the endoscope is wound around a drum outside the guide member 29, and a monitor and a video recording device for projecting an image from the endoscope main body S are provided at the end thereof.
One end of a rod-like handle 126 is fixed to the flange 117 formed at the upper end of the guide member 29, and the handle 126 is held horizontally. In the illustrated example, two handles 126 are provided on the flange 117.

Next, a description will be given of a method in which the endoscope is inserted into the water distribution pipe 1 with constant water and the inside of the pipe is investigated by the endoscope inserter 9 of the present embodiment.
In this embodiment, the endoscope main body S is sent to the vertical tube portion T6 side by the endoscope inserter 9 attached to the vertical tube portion T1, and the endoscope inserter 9 attached to the vertical tube portion T6 is used to insert the endoscope main body S. The endoscope main body S is sent to the vertical tube portion T1 side, and the inside of the tube is investigated. Further, in the endoscope inserter 9 attached to the vertical tube portion T4, the endoscope main body S is sent to both the vertical tube portion T1 side and the vertical tube portion T6 side.

  First, in the state of FIG. 2, the repair valve 11 is closed, the vertical pipe 3 is stopped, and the fire hydrant H is removed. Then, as shown in FIG. 3, the endoscope inserter 9 of this embodiment is attached to the repair valve 11.

  Specifically, in the endoscope inserter 9 in which the guide member 29 and the endoscope are set in the main body 27, the lower flange 35 of the main body 27 is overlapped with the upper flange 17 of the repair valve 11, The main body 27 is fixed to the repair valve 11 by bolts and nuts (not shown). At this time, a sealing material is disposed between the flange 17 of the repair valve 11 and the flange 35 of the main body 27 and is fixed in a watertight manner. Further, the on-off valve 37 of the drain pipe 39 of the main body 27 and the on-off valve 59 of the drain pipe 61 of the guide member 29 are both closed.

  After fixing the main body 27 to the repair valve 11, the repair valve 11 is opened. As a result, water enters the main body 27 and the guide member 29 from the horizontal pipe 1 through the repair valve 11, and the main body 27 and the guide member 29 are filled with water. In the present embodiment, the water-stopping portions 41 and 115 are provided at the upper end portion of the main body 27 and the upper end portion of the guide member 29, respectively, so that watertightness with respect to the outside is maintained and water does not leak to the outside. Absent.

Then, the guide member 29 is pushed downward with respect to the main body 27 while the repair valve 11 is opened. In this case, in FIG. 3, when the endoscope is to be sent to the right side of the water pipe 1, the guide member 29 should be pushed straight into the main body 27 with the distal end portion 81 of the guide material 69 facing the right side. That's fine.
In addition, by attaching a mark on the guide member 29 or the like so that the orientation of the guide material 69 can be grasped, positioning in the circumferential direction is easy even when the guide member 29 rotates in the circumferential direction during the pushing operation of the guide member 29. Can be done. By pushing in the guide member 29, the endoscope holder 31 and the endoscope body S provided at the lower end of the guide member 29 are also fed into the water pipe 1 side. Further, when the guide member 29 is pushed in, the endoscope cable C is also fed into the main body 27.

  FIG. 7 is a diagram illustrating a state in which the guide material 71 is in contact with the bottom of the water distribution pipe 1.

  When the guide member 29 is pushed downward, the distal end portion 71 a of the guide material 71 of the endoscope holder 31 comes into contact with the bottom of the water distribution pipe 1. At this time, since the guide member 71 is curved, when the distal end portion 71a comes into contact with the tube bottom of the water distribution pipe 1 and is further pushed downward (tube bottom side), the distal end portion 71a is brought to the tube bottom. 7 along the left side in FIG. 7 and the guide member 71 rotates around the base end.

  The guide material 69 is pushed out in the axial direction of the water distribution pipe 1 by rotating the guide material 71 around the base end portion. That is, the guide material 69 also rotates around the base end portion, and the distal end portion 81 of the guide material 69 moves to the right in FIG. As described above, the distal end portion 81 of the guide member 69 and the distal end portion 71a of the guide member 71 move in a direction away from each other, and the guide member 69 and the guide member 71 are developed in a “human” shape.

  FIG. 8 is a diagram illustrating a state in which the leg portion 77 of the endoscope holder 31 has reached the tube bottom and the endoscope main body S is being fed into the water distribution tube 1.

  When the guide member 29 is pushed further downward from the state of FIG. 7, the lower end portion of the leg portion 77 of the attachment portion 67 contacts the tube bottom. When the leg portion 77 of the mounting portion 67 is in contact with the tube bottom, the guide member 29 cannot be pushed further. In this state, the outer surface of the distal end portion 81 of the guide material 69 is also in contact with the tube bottom, and the distal end of the guide material 69 is arranged in a horizontal state substantially parallel to the tube bottom. Further, the side pieces 89 and 89 at the base end portion of the guide member 69 have an inclined end portion 89 a in contact with the lower end surface of the mounting portion 67. Further, the leading end portion 71 a of the guide material 71 extends to the left side through the leg portions 77, 77 of the mounting portion 67. In this manner, the upward movement of the guide member 29 is restricted in a state where the leg portion 77 of the attachment portion 67 has reached the tube bottom.

In this embodiment, when the guide member 29 is inserted into the main body 27, two bar members 127, 127 are erected in advance on the lid body 43 of the water stop portion 41, and the plate member 129 is provided on the bar member 127. Is mounted almost horizontally. A hole 129 a through which the guide member 29 is passed is formed in the plate material 129, and the guide member 29 is inserted into the main body 27 while being passed through the hole 129 a of the plate material 129.
Then, in a state where the leg portion 77 of the endoscope holder 31 is in contact with the tube bottom, an annular ring 131 that can be split into two is attached to the guide member 29 and fixed to the guide member 29. At this time, the ring 131 is fixed to the guide member 29 so as to be disposed immediately below the plate material 129.
With such a configuration, even if the guide member 29 is about to rise due to water pressure, the ring 131 is brought into contact with the plate material 129, whereby the upward movement of the guide member 29 is restricted.

  In this way, in a state where the guide member 29 is restricted from moving up and down with respect to the main body 27, the endoscope holder 31 is held in the state shown in FIG. 8, that is, in a state where the legs 77 are in contact with the tube bottom. The

  Then, in a state where the guide member 29 is restricted from moving up and down with respect to the main body 27, the cable C is further fed while viewing the video of the endoscope main body S, and the endoscope main body S along the conduit of the water distribution pipe 1 You can make progress. The image from the endoscope main body S is displayed on the monitor, and the situation in the water pipe 1 can be confirmed. It is also possible to save the video by the recording device. The endoscope main body S has a camera head mounted at the center thereof, and a plurality of LEDs for illumination are provided so as to surround the camera head.

When the investigation in the pipe 1 is completed, the restriction of the guide member 29 with respect to the main body 27 is released. That is, the ring 131 is removed from the guide member 29, the endoscope holder 31 is pulled up into the main body 27, and the repair valve 11 is closed. Thereby, the in-pipe investigation from the vertical tube portion T1 and the vertical tube portion T6 is completed. Further, the guide member 29 of the endoscope inserter 9 attached to the vertical tube portion T4 is rotated 180 degrees, and the reverse side investigation is similarly performed. In the vertical tube portion T1 and the vertical tube portion T6, the guide member 29 may be rotated 180 degrees and the reverse side of the tube 1 may be investigated. In other words, the endoscope is inserted into the opposite side of the vertical tube portion T6 by the endoscope inserter 9 attached to the vertical tube portion T1, or the endoscope inserter 9 attached to the vertical tube portion T6. The endoscope may be sent to the side opposite to the vertical tube portion T1 side.
After completion of the investigation, in this embodiment, each endoscope inserter 9 attached to the vertical tube portion T1 that is the entrance side of the pig and the vertical tube portion T6 that is the exit side of the pig is removed from the repair valve 11, and The endoscope inserter 9 attached to the vertical tube portion T4 provided between the tube portions T1 and T6 is in an attached state.

By the way, before and after investigating the inside of the tube by the endoscope inserter 9, the rust humps in the vertical tube portion may be removed with unrestricted water.
In particular, when the situation inside the water distribution pipe 1 is to be investigated with an endoscope, the endoscope holder 31 needs to pass through the vertical pipe 3. However, when rust humps adhere to the vertical tube 3 and the opening inside the vertical tube 3 is small, the endoscope holder 31 cannot pass through the vertical tube 3 and consequently the endoscope body S is arranged. It cannot be inserted into the water pipe 1. In such a case, first, it is necessary to remove the rust hump in the vertical pipe 3.

Hereinafter, a method of removing the rust hump R in the vertical pipe 3 will be described.
FIG. 9 is a cross-sectional view showing a state in which the rust hump R in the vertical tube 3 is scraped off by the rust hump removing device. FIG. 10 is a perspective view of a rust hump removing tool.

In the present embodiment, the rust hump removing device 141 is used for removing the rust hump from the vertical pipe portion.
The rust hump removing device 141 of the present embodiment is basically the same configuration as the endoscope inserter 9, and a rust hump removing tool 143 is attached to the guide member 29 instead of the endoscope holder 31. It is done. Therefore, in the following description, the rust hump removing tool 143 will be mainly described, and the same members as those of the endoscope inserter 9 are denoted by the same reference numerals.

  As with the endoscope holder 31, the rust hump removing tool 143 includes a cylindrical attachment portion 145 into which the lower end portion of the guide member 29 can be fitted. The attachment portion 145 can accommodate the endoscope main body S therein. The inner upper end of the attachment portion 145 has a slightly larger diameter, and the central hole of the attachment portion 145 is a stepped hole. As a result, when the guide member 29 is fitted into the attachment portion 145, the lower end portion of the guide member 29 comes into contact with a step portion (not shown) inside the attachment portion 145, thereby positioning the attachment portion 145 in the vertical direction. . The mounting portion 145 has four pin holes 147 formed in the same manner as the mounting portion 67 of the endoscope holder 31.

  The mounting portion 145 is provided with four rod-like leg portions 149 extending vertically downward at equal intervals in the circumferential direction. Each leg 149 has the same length, and the inner and outer peripheral surfaces of each leg 149 are formed continuously with the inner and outer peripheral surfaces of the attachment portion 145. The lower end portion of the leg portion 149 is formed on an inclined surface that is inclined outward in the radial direction of the mounting portion 145 as it goes downward, and serves as a blade portion 151 for scraping rust humps. Further, the attachment portion 145 is formed with an elongated notch (slit) 153 penetrating inward and outward from the central portion in the axial direction (vertical direction) toward the lower end portion along the axial direction. In this embodiment, a notch 153 is formed at one location between the adjacent leg portions 149 and 149. This notch 153 serves as a passage when discharging the rust humps that have been shaved off.

  When the rust hump removing device 141 is used to remove the rust hump R in the vertical tube 3, the lower end of the guide member 29 is attached to the mounting portion 145 of the rust hump removing tool 143 as in the case of the endoscope inserter 9. The mounting portion 145 and the guide member 29 are fixed by the pin 75.

In the attachment part 145 of the rust hump removing tool 143, the endoscope main body S is accommodated in advance with its head facing downward, and the endoscope cable C is the same as in the case of the endoscope inserter 9. Then, it is introduced into the guide member 29 through a water stop portion 115 provided in the guide member 29.
And when removing the rust hump R by the rust hump removing device 141 of the present embodiment, the main body 27 on which the guide member 29 to which the rust hump removing tool 143 is attached is set in the same manner as the endoscope inserter 9. Attach to the repair valve 11 from which the fire hydrant H has been removed. Further, the open / close valve 37 of the drain pipe 39 of the main body 27 and the open / close valve 59 of the drain pipe 61 of the guide member 29 are opened. At this time, it is preferable that one end portion of the hoses 155 and 157 is connected to the drain pipes 39 and 61, respectively, and the other end portion of the hoses 155 and 157 is directed to a drainage groove or the like.

  Thus, after mounting the main body 27 on the repair valve 11, the repair valve 11 is opened. Then, while confirming the state of the inside of the vertical tube 3 with an endoscope, the rust hump removing tool 143 is moved up and down or rotated to scrape the rust hump R in the vertical tube 3 with the blade portion 151. . The scraped rust hump R enters the main body 27 and the guide member 29 via the outside of the attachment portion 145 and the inside of the attachment portion 145, and is discharged to the outside from the drain pipes 39 and 61. In this embodiment, the operation can be performed while adjusting the opening degree of the on-off valves 37 and 59 of the drain pipes 39 and 61 of the main body 27 and the guide member 29.

  After the removal of the rust hump is completed, the rust hump removing tool 143 may be pulled up into the main body 27 and the repair valve 11 may be closed. Then, after the rust hump removal of the vertical pipe portion is completed, the endoscope holder 31 is attached to the guide member 29 instead of the rust hump removing tool 143 as described above, and the endoscope is placed in the water distribution pipe 1. Send in and investigate inside the pipe. In this embodiment, since the endoscope holder 31 or the rust hump removing tool 143 can be attached to the lower end portion of the guide member 29 in a replaceable manner, the workability is good.

  In this way, in this embodiment, before cleaning with the pig, without removing the horizontal tube 1, it is possible to remove the rust humps in the vertical tube part and to investigate the inside of the tube with the endoscope without interruption. The situation inside the tube can be grasped by an endoscope and recorded.

Following the removal of rust humps from the vertical tube and the inspection of the tube with an endoscope, the tube is cleaned with a pig.
When cleaning the inside of the pipe with the pig, first, the valve provided in the pipe network and the stop cock in the meter box provided in each household are appropriately closed to cut off the water in the section of the pipe network, thereby forming the traveling path of the pig.
In the present embodiment, in FIG. 1, by closing the valves V1, V3, V4, V7, and V9, a pig travel route indicated by a dotted line is formed.

Further, in this embodiment, the endoscope is inserted into the tube by the endoscope inserter 9 provided in the vertical tube portion T4 provided between the vertical tube portion T1 on the entrance side of the pig and the vertical tube portion T6 on the exit side. It is possible to determine whether or not water has been shut off by feeding the main body S and checking the presence or absence of water flow with a monitor.
Note that a flow rate sensor or a water pressure sensor may be inserted into the pipe from the vertical pipe portion T (T1, T2,...) On the travel path of the pig P to confirm that the water cutoff has been performed. At this time, instead of the endoscope holder 31 in the endoscope insertion device 9, a flow rate sensor or a water pressure sensor can be attached to the lower end portion of the guide member 29 and inserted into the tube 1 from the vertical tube portion T. . And what is necessary is just to judge whether the water stop was completely performed with the numerical value from a sensor.

  FIG. 11 is a longitudinal sectional view in front view showing a state in which the launcher and the catcher are respectively attached to the vertical pipe portion. FIGS. 12A and 12B are diagrams showing a launcher, where FIG. 12A is a plan view and FIG.

After confirming that the water cut has been performed, the launcher 161 is attached to the vertical tube portion T1 on the entrance side of the pig, and the catcher 163 is attached to the vertical tube portion T6 on the exit side of the pig.
In addition, the endoscope body S of the endoscope inserter 9 attached to the vertical tube portion T4 is disposed near the boundary between the vertical tube 3 and the horizontal tube 1.

The launcher 161 includes a cylindrical launcher main body 165 connected to the vertical pipe portion, and a lid 167 that closes the upper end portion of the launcher main body 165.
In the present embodiment, the launcher body 165 is cylindrical, and is attached to the repair valve 11 with its axis arranged vertically. Moreover, the lower end part of the launcher main body 165 is formed in the cone shape which diameter-reduces as it goes below, and the flange 169 is formed in the lower end and it expands radially outward. Furthermore, the inner diameter of the lower end of the launcher body 165 corresponds to the outer diameter of the pipe line 21 of the repair valve 11.

  The lid 167 has a disk shape, and its lower end is slightly reduced in diameter and formed in a stepped shape. The lid 167 is placed on the launcher body 165 so as to close the upper opening of the launcher body 165, and is fixed to the launcher body 165 with bolts (not shown). When the lid 167 is attached to the launcher body 165, an O-ring is fitted on the outer peripheral surface of the lower end portion of the lid 167.

  A screw hole 171 is formed through the lid 167 so that one end of the water supply pipe 173 can be connected thereto. In addition, substantially U-shaped handles 174 are attached to the outer peripheral surface of the launcher body 165 at four locations in the circumferential direction.

  The launcher 161 has its launcher body 165 placed on the repair valve 11, and the flange 169 of the launcher body 165 and the upper flange 17 of the repair valve 11 are fixed to each other by bolts and nuts and attached to the repair valve 11.

  FIGS. 13A and 13B are diagrams showing the catcher, where FIG. 13A is a plan view with the lid removed, and FIG. 13B is a longitudinal sectional view in front view.

The catcher 163 includes a cylindrical catcher main body 175 connected to the vertical pipe portion, and a lid 177 that closes the upper end portion of the catcher main body 175.
In the present embodiment, the catcher body 175 has a bottomed cylindrical shape, and is attached to the repair valve 11 with its opening facing upward. A circular through hole 179a is formed in the central portion of the bottom wall 179 of the catcher body 175 along the axial direction. A pipe 181 is provided upright on the bottom wall 179 inside the catcher body 175.
Specifically, the inner diameter of the pipe 181 corresponds to the diameter of the through hole 179a of the catcher main body 175, and is erected at the center of the bottom wall 179 of the catcher main body 175 so as to communicate with the through hole 179a. ing. In this embodiment, the dimension of the pipe 181 in the axial direction is about half of the dimension of the catcher body 175 in the axial direction.
In the present embodiment, the through hole 179 a of the bottom wall 179 of the catcher body 175 and the inner diameter of the pipe 181 correspond to the outer diameter of the pipe line 21 of the repair valve 11.

A pig accommodating portion 183 is formed at the upper end portion of the pipe 181 with a plurality of wires and rods. In this embodiment, the lower ends of the plurality of wires 185 are respectively fixed to the upper end of the pipe 181, and the upper ends of the wires 185 are fixed to the inner peripheral surface of the upper end of the catcher body 175 so that the pig storage portion 183 is provided. Is formed.
Specifically, in this embodiment, a pig housing portion 183 is formed by six metal wires 185, and each wire 185 has its lower end arranged at the upper end of the pipe 181 at equal intervals in the circumferential direction. The upper end portion is fixed to the inner peripheral surface of the catcher body 175 so as to spread radially upward, and a pig housing portion 183 is formed.

  Further, a drain pipe 187 is connected to the lower end of the catcher body 175 so as to extend horizontally. Further, a bar 189 is provided on the bottom wall 179 of the catcher body 175 so as to protrude downward. In this embodiment, bar members 189 are provided projecting downward at four circumferentially equidistant positions on the bottom wall 179 of the catcher body 175, and a screw 189a is formed on the outer peripheral surface of the lower end portion of each bar member 189. ing. Further, on the outer peripheral surface of the catcher main body 175, there are provided substantially U-shaped handles 190 at four positions in the circumferential direction spaced apart from each other in the vertical direction.

  In the catcher 163 having such a configuration, the bar 189 of the catcher body 175 is inserted into the through hole of the flange 17 of the repair valve 11, the catcher body 175 is placed on the repair valve 11, and the lower end of the bar 189. A nut is screwed into the portion 189 a and is fixed to the repair valve 11.

The lid 177 of the catcher 163 has a disk shape that closes the upper opening of the catcher main body 175, and the lower end portion thereof is slightly reduced in diameter and formed in a stepped shape.
A through hole 177a is formed at the center of the lid 177, and a window 191 is formed in the through hole 177a by fixing a pressure-resistant glass. The lid 177 is placed on the catcher body 175 and fixed with bolts (not shown). When the lid 177 is attached to the catcher body 175, an O-ring is fitted on the outer peripheral surface of the lower end portion of the lid 177.

  After the launcher 161 or the catcher 163 is attached to the repair valve 11 of each vertical pipe portion, the pig P is accommodated in the launcher body 165, and the lid 167 of the launcher 161 is closed.

The pig according to the present embodiment has a substantially spherical shape made of urethane that can be elastically deformed.
By the way, the pig P has various shapes such as a spherical shape and a cylindrical shape, and also has various sizes and materials. When cleaning with the pig P, it is necessary to select a shape and size suitable for the tube. In this embodiment, an appropriate shape and size are obtained by examining the inside of the tube with an endoscope in advance. Can be selected.

  As shown in FIG. 11, after accommodating the pig P in the launcher 161, one end of the water supply pipe 173 is connected to the screw hole 171 of the lid 167 of the launcher 161. A pump is connected to the other end of the water supply pipe 173. The water supplied to the pump can be water from another fire hydrant. In this case, water is supplied to the pump via a valve, a pressure reducing valve, or the like. The water supplied to the pump may be water stored in a tank in advance. In the illustrated example, a water pressure gauge G is attached to the lid 167 of the launcher 161.

Further, one end of the drain pipe 193 is connected to the drain pipe 187 of the catcher body 175, and the other end is disposed in a side groove or the like. In addition, when draining by the drain pipe 193, it is preferable to drain to the side groove through a strainer or the like.
And each repair valve 11 of the vertical pipe part T1 and the vertical pipe part T6 is opened, a pump is operated, and water is sent in into the launcher 161. Thereby, the pig P is pushed out from the lower end opening of the launcher body 165 to the vertical tube portion T1 by water pressure, moves down the vertical tube portion T1, and further advances into the horizontal tube 1.

The pig P contracts when passing through the lower end portion of the launcher body 165 and passes through the vertical tube portion T1, and further travels while contracting and contacting the inner peripheral surface of the horizontal tube 1 when traveling through the horizontal tube 1. To do.
In this embodiment, the pipe P is closed in advance and the section water is shut off, so that the pig P moves to the right side in FIG. 11 after passing through the vertical pipe portion, and travels indicated by a dotted line in FIG. Proceed along the route.

  As the pig P travels in the pipe 1, deposits and the like accumulated in the pipe are pushed out together with the water, and the water and deposits pushed out by the pig P pass through the vertical pipe portion T6 on the exit side of the pig P. Then, it enters the catcher 163 and is drained from the drain pipe 187 of the catcher 163 to the outside.

After traveling in the horizontal tube 1, the pig P ascends the vertical tube T 6 on the exit side and enters the catcher 163. Specifically, the pig that has passed through the outlet-side vertical tube portion T6 enters the pipe 181 from the through hole 179a of the bottom wall 179 of the catcher body 175, passes through the pipe 181 and is pushed into the pig housing portion 183. .
The pig P is contracted until it passes through the pipe 181, but when it reaches the pig housing 183, it is restored to its original size. Thereby, the pig P does not return into the pipe 1 via the pipe 181 or the pipe 181.

Further, the pig P stays in the pig accommodating portion 183, so that the pig can be prevented from entering the drain pipe 187. Furthermore, in this embodiment, the upper end of the pipe 181 is disposed above the bottom of the catcher body 175, so that the water sent by the pressure of the pump passes from the upper end of the pipe 181 to the bottom of the catcher body 175. It falls and is discharged from the drain pipe 187 to the outside.
As a result, the sediment collected by the pig P is collected at the bottom of the catcher body 175 or discharged from the drain pipe 187 to the outside, so that it does not return to the pipe via the pipe 181 again.

After confirming that the pig P is accommodated in the catcher 163 from the glass window 191 of the lid 177, the pump is stopped to stop water supply, and each repair valve 11 is closed.
Then, the deposit in the pipe is removed by the endoscope inserter 9 attached to the vertical pipe section T4 disposed between the vertical pipe section T1 on the entrance side of the pig P and the vertical pipe section T6 on the exit side. To see if
When deposits remain in the pipe, the inside of the pipe is cleaned again by the pig P. The cleaning by the pig P and the confirmation in the tube 1 by the endoscope are repeated, and when there is no deposit in the tube 1, each repair valve 11 is closed, and the launcher 161 and the catcher 163 are removed from each repair valve 11. Further, the endoscope inserter 9 attached to the vertical tube portion T4 is also removed.

  Thus, in this embodiment, the number of times the pig travels can be appropriately determined by observing the inside of the tube with the endoscope after the pig P travels. Further, the inside of the pipe 1 can be investigated without removing the launcher 161 and the catcher 163, so that the working time can be shortened and the water shut-off time can be shortened. Furthermore, even if the pig P remains in the tube 1 for some reason, it can be detected early by the endoscope inserter 9.

By the way, when cleaning is performed with the pig P, the pig P may not be able to push the deposits up to the catcher 163 and may accumulate at a position below the vertical tube portion T6 on the outlet side. Specifically, deposits may accumulate immediately below the vertical tube portion T6 or ahead of the vertical tube portion T6 in the traveling direction of the pig P.
Therefore, next, the collecting device 201 collects deposits or the like accumulated in the vertical tube portion T6 on the exit side of the pig P, that is, a position below the vertical tube portion T6 to which the catcher 163 is attached.

  FIG. 14 is a front-view vertical cross-sectional view showing a state in which the recovery device of the present embodiment is attached to the vertical pipe portion. 14, FIG. 19, and FIG. 20 show an example in which the deposit accumulated mainly in the left lateral tube 1 after the pig P has moved up the vertical tube portion T6 from the right lateral tube 1 is collected outside the tube. ing.

The recovery device 201 of this embodiment includes a cylindrical main body 27 that is detachably attached to the vertical tube portion T, a guide member 29 that is inserted into the main body 27 in a watertight state so as to be able to advance and retreat, and a distal end portion of the guide member 29. The main body 27 and the guide member 29 are configured in the same manner as the endoscope inserter 9. That is, the collection device 201 of the present embodiment is configured such that the suction member 203 is attached to the lower end portion of the guide member 29 in the endoscope inserter 9 instead of the endoscope holder 31. Therefore, in the following description, the suction member 203 will be mainly described, and the same members as those of the endoscope inserter 9 are denoted by the same reference numerals.
In this embodiment, the main body 27 of the recovery device 201 is attached to the repair valve 11 via a plurality of cylindrical single tubes 205. In the illustrated example, the main body 27 is fixed to the upper part of two single pipes 205 placed and fixed on the repair valve 11.

FIG. 15 is a view showing the suction member, and shows a curved state.
16 is a view of the suction member of FIG. 15 as viewed from the distal end side, and FIG. 17 is a plan view of the distal end portion of the suction member of FIG.
FIG. 18 is a cross-sectional view showing the suction member attached to the guide member.

  The suction member 203 includes an attachment portion 207 detachably attached to the guide member 29, a hose 209 having one end connected to the attachment portion 207, and a suction portion 211 connected to the other end of the hose 209. Prepare for the main part.

As shown in FIG. 18, the attachment portion 207 has a cylindrical shape and an inner diameter into which the guide member 29 is fitted, and is attached to the guide member 29 with the axis line arranged vertically. Further, the mounting portion 207 has a stepped cylindrical shape whose lower end portion has a slightly reduced diameter.
Furthermore, in this embodiment, as shown in FIG. 18, the inner hole 208 of the mounting portion 207 is a stepped hole, and the lower end portion of the guide member 29 is inserted into the upper large-diameter hole 208a. At this time, the lower end portion of the guide member 29 is brought into contact with the step portion 208b of the inner hole 208 of the attachment portion 207, whereby the attachment portion 207 is positioned in the vertical direction.

Further, in this embodiment, as shown in FIG. 15, the outer surfaces of the upper and lower end portions of the attachment portion 207 are formed by cutting out into a rectangular plane 213, respectively.
Furthermore, four pin holes 215 are formed in the attachment portion 207 so as to penetrate along the front-rear direction. Each pin hole 215 is formed at a position corresponding to each pin hole 63 of the guide member 29 when the lower end portion of the guide member 29 is fitted into the mounting portion 207.

  The hose 209 has a flexible plastic bellows shape and can be bent. One end of the hose 209 is fitted into the lower end of the attachment portion 207 and is fixed to the attachment portion 207. In this embodiment, the fastening ring 217 is fitted to the outer peripheral surface of the hose 209 in a state where one end of the hose 209 is fitted into the attachment portion 207, and the hose 209 is fastened and fixed to the attachment portion 207.

The suction part 211 is a cylinder having a suction port 229 that sucks deposits and the like and sends them to the hose 209.
Specifically, the suction portion 211 has a cylindrical portion 219 whose distal end portion is a rectangular shape, and its proximal end portion is formed in a conical shape whose diameter decreases toward the proximal end side, and then further toward the proximal end side. It extends in a cylindrical shape. In other words, the suction portion 211 is configured by integrating a rectangular cylindrical portion 219 on the distal end side and a cylindrical portion 221 on the proximal end side by a conical portion 223 whose diameter decreases toward the proximal end side. .

  In the present embodiment, in the state shown in FIG. 16, the distal end side cylinder portion 219 of the suction portion 211 is formed as an arc surface with its upper surface 219a protruding upward, and the lower surface 219b and both side surfaces 219c are flat surfaces. Is formed.

  Further, in the state shown in FIG. 16, the inner hole 225 of the cylinder portion 219 of the suction portion 211 has a substantially circular hole 227 on the upper side and a substantially rectangular hole 229 on the lower side. 229 is continuously formed with a part overlapping. The holes 227 and 229 of the cylindrical portion 219 of the suction portion 211 communicate with the inner hole 231 of the proximal end side cylindrical portion 221 of the suction portion 211. In this embodiment, the rectangular hole 229 on the lower side of the distal end side cylinder portion 219 of the suction portion 211 is used as a suction port. The suction portion 211 is fixed to the hose 209 by fitting the other end portion of the hose 209 into the proximal-side cylindrical portion 221.

In the present embodiment, the endoscope main body S can be accommodated in the suction portion 211.
Specifically, in the state shown in FIG. 16, the suction part 211 of the present embodiment has a structure that can be split into right and left. Then, the suction member components 233 and 233 divided into two parts are fixed to each other by screws 235 so that the endoscope main body S is accommodated in the upper circular hole 227 of the cylindrical part 219.

Further, in this embodiment, when the suction part constituting members 233 and 233 are overlapped and fixed, elongated rectangular plate pieces 237 and 239 are arranged above and below the suction part constituting members 233 and 233, respectively.
That is, the pair of suction member constituting members 233 and 233 are fixed to each other by the screw 235 in a state where the plate pieces 237 and 239 are sandwiched in the vertical direction in the state shown in FIG.
Of the plate pieces 237 and 239, the upper plate piece 237 protrudes from the suction portion 211 toward the base end side, and the lower plate piece 239 has the same dimensions as the suction portion 211.

Further, as shown in FIGS. 16 and 18, an arcuate locking portion 241 is formed on the tip side cylindrical portion 219 of the suction portion 211 in the upper circular hole 227 so as to slightly protrude radially inward. It is in contact with the outer peripheral surface of the distal end portion of the endoscope main body S accommodated therein.
The locking portion 241 restricts the endoscope body S from moving toward the distal end side with respect to the suction portion 211. As shown in FIG. 18, the endoscope main body S is in contact with the inner hole 223 a whose diameter decreases toward the proximal end side of the conical portion 223 of the suction portion 211, and the proximal end thereof. Movement to the side is restricted. That is, the endoscope main body S is accommodated in the suction portion 211 in a state where the longitudinal movement is restricted with respect to the suction portion 211. Note that the cable C of the endoscope is passed through the hose 209.

  Further, in the present embodiment, an elongated rectangular plate spring 243 is provided inside the hose 209, one end portion is fixed to the attachment portion 207, and the other end portion is fixed to the suction portion 211.

The leaf spring 243 has substantially the same length as the hose 209 and is fixed to the attachment portion 207 and the suction portion 211 so as to be disposed along the side where the endoscope main body S is disposed.
Specifically, as shown in FIG. 18, both end portions of a substantially U-shaped hook portion 245 are fixed to the lower end portion of the attachment portion 207, and one end portion of a leaf spring 243 is attached to the hook portion 245. Is folded and attached.

The other end of the leaf spring 243 is fixed to the base end of the upper plate piece 237 sandwiched between the suction member constituting members 233 and 233.
In this embodiment, a pin 247 is fixed to the base end portion of the plate piece 237, and the other end portion of the plate spring 243 is wound around and fixed to the pin 247.

The leaf spring 243 attached in this manner is disposed along the longitudinal direction of the hose 209 in proximity to or in contact with the inner peripheral surface of the hose 209.
In the present embodiment, the leaf spring 243 is disposed at the same circumferential position as the endoscope body S in the hose 209. In other words, the endoscope main body S is disposed at a position corresponding to the leaf spring 243 provided along the axial direction of the hose 209 in contact with or close to the inner surface of a part of the hose 209 in the circumferential direction. .
In FIG. 18, the leaf spring 243 is disposed on the left side in the hose 209 along the axial direction of the hose 209, and the endoscope main body S is disposed on substantially the same straight line as the leaf spring 243.

With this configuration, as shown in FIG. 15, the hose 209 of the suction member 203 according to the present embodiment is easily bent so that the endoscope main body S is disposed inside.
In other words, in this embodiment, the leaf spring 243 is disposed at a position shifted from the central axis of the hose 209, and the leaf spring 243 is not expandable / contracted, whereas the bellows-like shape is disposed outside the leaf spring 243. The hose 209 can be expanded and contracted.
In the case of such a configuration, it is easy to curve the hose 209 so that the leaf spring 243 is arranged inward in the bending direction, whereas the hose 209 is arranged so that the leaf spring 243 is arranged in the outside in the bending direction. It is not easy to bend.
As described above, the hose 209 of the present embodiment is defined by the leaf spring 243 to be curved so that the leaf spring 243 is disposed on the inside, and accordingly, the endoscope body S is disposed on the inside. It is easy to curve.

  The suction member 203 of the present embodiment is fixed to the guide member 29 by the pin 75 as in the case of the endoscope inserter 9, with the lower end portion of the guide member 29 fitted into the mounting portion 207.

As shown in FIG. 14, the suction member 203 attached to the guide member 29 is accommodated in the main body 27 and the single tube 205, is pulled up to the upper end of the main body 27, and the hose 209 is suspended. It does not extend downward from the single tube 205.
Further, the cable C of the endoscope is introduced into the hose 209 via a water stop portion 115 provided at the upper end portion of the guide member 29.

  The recovery device 201 having such a configuration is used with its main body 27 fixed to the repair valve 11. Further, the drain hose 249 is connected to the drain pipe 61 of the guide member 29 to open the on-off valve 59, and the on-off valve 37 of the main body 27 is closed.

  After the collection device 201 is installed on the repair valve 11, the repair valve 11 is opened and the guide member 29 is pushed downward. At this time, in FIG. 14, when it is desired to feed the suction portion 211 to the left side of the water distribution pipe 1, the guide member 29 is straight with respect to the main body 27 with the endoscope main body S and the leaf spring 243 arranged on the left side. Just push it in. Moreover, even if the guide member 29 rotates in the circumferential direction during the pushing operation of the guide member 29 by attaching a mark to the guide member 29 or the like so that the position of the endoscope body S or the leaf spring 243 can be grasped. Positioning in the circumferential direction can be easily performed. By pushing in the guide member 29, the suction member 203 provided at the lower end of the guide member 29 is sent to the water distribution pipe 1 side. When the guide member 29 is pushed in, the endoscope cable C is also fed into the main body 27.

When the guide member 29 is pushed downward, the suction portion 211 of the suction member 203 approaches the tube bottom almost directly below the vertical tube portion T6, and the accumulated deposit is sucked from the suction port 229 and collected. The collected deposit is sent together with water to the guide member 29 through the hose 209 and discharged from the drain pipe 61 to the outside.
In this embodiment, this suction is performed by the differential pressure between the external atmospheric pressure and the pressure in the pipe, but it may be recovered by a pump.

  FIG. 19 is a view showing a state in which the guide member is pushed from the state of FIG. 14 and the suction part approaches the tube bottom, and FIG. 20 is a state in which the guide member is further pushed from the state of FIG. It is a figure which shows the state currently moved along.

  When the cable C is pushed into the guide member 29 with the suction portion 211 approaching the tube bottom, the cable C comes into contact with the inner peripheral surface of the hose 209 and presses the hose 209. In the present embodiment, as shown in FIG. 19, the hose 209 is bent so that the leaf spring 243 side is on the inside, and the suction portion 211 is directed to the left side, as shown in FIG. In this state, the endoscope body S is disposed on the upper side, and the suction port 229 is disposed on the lower side.

  When the guide member 29 and the cable C are further pushed in with the hose 209 bent in this manner, the lower surface 219b of the suction portion 211 comes into contact with the tube bottom as shown in FIG. Move to the left along the bottom of the tube. Then, the deposit is collected from the suction port 229 of the suction part 211. In the present embodiment, the bending direction of the hose 209 is defined, and the lower surface 219b of the suction portion 211 is formed to be a flat surface, so that the endoscope body S can be stably placed without being tilted. To move.

  When the fact that the deposit has been collected is investigated and recorded by the endoscope, the guide member 29 is pulled up and the repair valve 11 is closed to the state shown in FIG. Then, the guide member 29 is rotated 180 degrees, the suction portion 211 is sent to the right side of the pipe 1 in FIG. 14 and cleaning is performed in the same manner, and when the deposit is collected, the endoscope attached to the suction member 203 Investigate the inside of the pipe, and investigate and record the situation inside the pipe with a monitor.

  When the collection of sediment and the investigation and recording in the pipe are completed, the collection device 201 is removed from the repair valve 11, and the fire hydrant H is attached to the repair valve 11 of each of the vertical pipe portions T1, T4, T6 again. And each valve of a pipe network is opened, water distribution is restarted, and cleaning is complete | finished.

According to the collection apparatus 201 of the present embodiment, cleaning can be performed while examining the inside of the tube with an endoscope, and it is possible to eliminate the remaining of deposits.
Further, since the bending direction of the hose 209 is defined by the leaf spring 243, it can be advanced in a desired direction. At this time, by attaching a leaf spring 243 slightly shorter than the hose 209 to the hose 209 and bending the hose 209 slightly in advance, the bending direction of the hose 209 can be more reliably defined.

According to the in-pipe cleaning method of the present embodiment, the rust hump removal and the in-pipe investigation of the vertical pipe portion are performed with uninterrupted water, so that the water stop time can be shortened.
Further, in this embodiment, by examining and recording the inside of the pipe with an endoscope before and after cleaning, the situation inside the pipe before and after cleaning can be visually recognized, and it becomes easy to create a report.
Further, deposits accumulated in the lower position of the vertical tube portion on the pig exit side are also discharged to the outside by the recovery device, so that deposits flowing into the tube can be eliminated.

  In addition, in this embodiment, it is possible to perform a series of rust hump removal of the vertical pipe portion, investigation before cleaning the inside of the pipe, cleaning of the pipe with a pig, and cleaning of the pipe with a collection device, and it is possible to clean efficiently in a short time. Is possible.

The in-pipe cleaning method of the present invention is not limited to the configuration of the above embodiment, and can be changed as appropriate.
For example, the endoscope inserter, the rust hump removing device, the launcher, the catcher, and the recovery device used in the above embodiment may have other structures.
Moreover, in the said Example, although the leaf | plate spring was arrange | positioned in the hose of a collection | recovery apparatus and the bending direction was prescribed | regulated, the wire etc. which length does not change, such as a wire and a string, may be sufficient.

Moreover, in the said Example, although the main body 27 of the collection | recovery apparatus 201 was attached to the repair valve 11 via the several single pipe | tube 205, the main body 27 itself is formed long in an axial direction, and is directly fixed to a repair valve. You may make it do.
Furthermore, in the said Example, although the endoscope inserter, the launcher, the catcher, and the collection | recovery apparatus were attached to the repair valve, you may attach to a fire hydrant. That is, what is necessary is just to set it as the structure attached to a fire hydrant using the lower end part of each member as a nozzle | cap | die.

It is a plane view schematic explanatory drawing which shows an example of the pipe network in which the cleaning method in a pipe | tube of this invention is used. It is a front view which shows the vertical pipe part provided in the pipe network of FIG. It is a figure which shows an example of the endoscope inserter used for the cleaning method in a pipe | tube of this invention, and is a front view schematic longitudinal cross-sectional view which shows the state attached to the vertical pipe part. It is a front view longitudinal cross-sectional view which shows the lower structure of the endoscope inserter of FIG. It is a schematic longitudinal cross-sectional view which shows the water stop part provided in the upper end part of the main body of the endoscope inserter of FIG. It is a perspective view which shows the endoscope holder of the endoscope insertion device of FIG. It is a figure which shows the state which the guide member was pushed in from the state of FIG. 3, and the guide material contacted the pipe bottom. It is a figure which shows the state which the guide member is further pushed in from the state of FIG. 7, the leg part of the endoscope holder reaches the tube bottom, and the endoscope main body is fed into the tube. It is sectional drawing which shows an example of the rust hump removal apparatus used for the cleaning method in a pipe | tube of this invention, and shows the state which is scraping off the rust hump in a vertical pipe by it. It is a perspective view of the rust hump removal tool of the rust hump removal apparatus of FIG. It is a front view longitudinal cross-sectional view which shows the state by which the launcher and the catcher were each attached to the vertical pipe part. It is a figure which shows an example of a launcher, (a) is a top view, (b) is a front view longitudinal cross-sectional view. It is a figure which shows an example of a catcher, (a) is a top view of the state which removed the cover, (b) is a front view longitudinal cross-sectional view. An example of the collection | recovery apparatus used for the pipe cleaning of this invention is shown, and it is a front view longitudinal cross-sectional view which shows the state attached to the vertical pipe part. It is a figure which shows an example of the suction member of the collection | recovery apparatus of FIG. 14, and has shown the curved state. It is the figure which looked at the suction member of FIG. 15 from the front end side. It is a figure which shows the front-end | tip part of the suction member of FIG. 15, and has shown one part in cross section. It is a figure which shows the suction member of the collection | recovery apparatus of FIG. 14, and is sectional drawing which shows the state attached to the guide member. It is a figure which shows the state which pushed in the guide member from the state of FIG. 14, and the suction part approached the pipe bottom. It is a figure which shows the state which pushed in the guide member further from the state of FIG. 19, and has moved the suction part along the pipe bottom.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe | tube 3 Vertical pipe | tube 9 Endoscope insertion device 11 Repair valve 161 Launcher 163 Catcher 201 Recovery device 203 Suction member 243 Leaf spring

Claims (9)

The first step of investigating the inside of the pipe by inserting an endoscope with constant water into the pipe constituting the traveling path of the pig among the pipes constituting the pipe network,
A second step of operating a valve arranged in the pipe network to cut off a part of the pipe network to make a pig travel path;
A third step of running the pig from the launcher provided in the vertical tube portion at one end of the travel route toward the catcher provided in the vertical tube portion at the other end of the travel route;
A fourth step of collecting deposits accumulated below the vertical pipe portion on the exit side of the pig from the vertical pipe portion;
An in-pipe cleaning method comprising sequentially a fifth step of examining the inside of the pipe constituting the travel route with an endoscope. After the second step, before the third step, the method further comprises a step of confirming the water shutoff by an endoscope inserted into a pipe from a vertical pipe portion provided in the middle of the travel route. Item 2. The pipe cleaning method according to Item 1. After the second step and before the third step, the method further comprises a step of confirming the water shutoff by inserting a flow rate sensor or a water pressure sensor into a pipe from a vertical pipe provided in the middle of the travel route. The pipe cleaning method according to claim 1. 4. The method according to claim 1, further comprising a step of removing rust humps adhering in the vertical pipe portion on the travel route immediately before or after the first step with continuous water. In-pipe cleaning method. Immediately after the third step, confirm the cleaning condition in the tube with an endoscope inserted into the tube from the vertical tube part provided in the middle of the travel route, and repeat the third step or go to the fourth step The pipe cleaning method according to any one of claims 1 to 4, wherein the pipe is moved. A device used for cleaning inside a pipe,
A cylindrical main body installed in a watertight state on the upper part of the vertical pipe part branched upward from the horizontal pipe part;
A cylindrical guide member that is inserted into the main body so as to be able to advance and retreat in a watertight state, and has a drain pipe that is capable of communicating inside and outside above the main body,
A collecting device comprising: a bellows-like hose attached to a lower end portion of the guide member and collecting deposits in the pipe and discharging the deposit from the drain pipe of the guide member to the outside. The endoscope cable is inserted into the guide member so as to be able to advance and retract in a watertight state, and is introduced into the hose.
The recovery apparatus according to claim 6, wherein an endoscope main body is disposed at a distal end portion of the hose. 8. The recovery device according to claim 6, wherein a member that defines a bending direction of the hose is attached in the hose along the axial direction in a part of the circumferential direction. The recovery device according to claim 8, wherein the member that defines the bending direction of the hose is a leaf spring.

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