JP5709469B2 - Method and apparatus for cleaning pipe inner surface - Google Patents

Description

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

  Conventionally, for this type of pipe inner surface cleaning method, for example, with the flow in the water pipe shut off, the cleaning pig is inserted from the branch pipe into the water pipe, and then the water is sent from the upstream side in the water pipe for cleaning. There is known a cleaning method for cleaning the inner surface of a water pipe with a cleaning pig while transferring the pig for downstream in the water pipe (see Patent Documents 1 and 2 below). Further, as a cleaning pig, a compression-deformable rubber having a hollow portion inside is known (see Patent Document 3 below).

  Normally, the inner diameter of the branch pipe is smaller than the inner diameter of the water pipe, and the diameter of the cleaning pig is set according to the diameter of the water pipe, so when inserting the cleaning pig from the branch pipe into the water pipe, It is necessary to insert the working pig from the branch pipe into the water pipe with the diameter reduced by compressing and deforming.

JP2009-66522 JP2008-25283 JP 2001-87727 A

  However, in the above conventional type, when the cleaning pig is inserted from the branch pipe into the water pipe, the diameter of the cleaning pig increases in the middle of the branch pipe, and the cleaning pig (cleaning member) enters the water pipe from the branch pipe. There is a problem that it is difficult to insert smoothly.

  An object of the present invention is to provide a pipe inner surface cleaning method and a cleaning apparatus capable of smoothly inserting a cleaning member from a branch pipe into a main pipe.

In order to achieve the above object, the first aspect of the present invention is a tube inner surface for cleaning the inner surface of the main tube by inserting a cleaning member made of an expandable / contractable elastic material having a hollow portion into the main tube from the branch tube. Cleaning method,
Put the cleaning member in the insertion tube with the diameter reduced,
With the flow in the main pipe blocked, insert the insertion cylinder from the branch pipe into the connection communication section between the branch pipe and the main pipe,
Push the cleaning member from the insertion tube into the main tube,
Injecting fluid into the hollow part to expand the diameter of the cleaning member,
A fluid is allowed to flow from the upstream side in the main pipe , the cleaning member is transferred to the downstream side in the main pipe, and the cleaning member slides on the inner surface of the main pipe to clean the inner surface of the main pipe.

  According to this, after inserting the insertion cylinder containing the cleaning member having a reduced diameter into the connecting communication portion between the branch pipe and the main pipe from the branch pipe, the cleaning member is inserted into the main pipe from the insertion cylinder. The cleaning member can be smoothly inserted from the branch pipe into the main pipe.

In the method for cleaning the inner surface of the pipe according to the second aspect of the invention, the diameter of the cleaning member is reduced and water is attached to the cleaning member.
Put the cleaning member with water in the insertion tube in a frozen state,
After the cleaning member is thawed, the insertion tube is inserted from the branch pipe into the connection communication portion.

According to this, the cleaning member can be easily accommodated in the insertion cylinder with the diameter reduced.
In the method for cleaning the inner surface of the pipe according to the third invention, the cleaning member is covered with a thin cover body in a state where the diameter of the cleaning member is reduced.
Apply a lubricant to at least one of the inner surface of the insertion tube and the outer surface of the cover body,
Put the cleaning member together with the cover in the insertion tube,
After inserting the insertion tube from the branch pipe into the connection communication part with the flow in the main pipe blocked,
Extrude the cleaning member together with the cover from the insertion tube into the main tube,
The cover body is collected from the main pipe through the branch pipe,
A fluid is injected into the hollow portion to expand the diameter of the cleaning member.

  According to this, since the lubricant is applied to at least one of the inner surface of the insertion cylinder and the outer surface of the cover body, the frictional resistance between the cover body and the insertion cylinder is reduced, thereby covering the cleaning member. The body can be smoothly and reliably extruded from the insertion cylinder into the main pipe.

The pipe inner surface cleaning method according to the fourth aspect of the present invention is such that an extrusion jig is inserted into the branch pipe and the cleaning member is pushed out from the insertion cylinder into the main pipe.
The fifth invention is a pipe inner surface cleaning apparatus used in the cleaning method according to any one of the first to fourth inventions,
A cylinder collecting means for collecting the insertion cylinder from the branch pipe is connected to the insertion cylinder,
An injection means for injecting a fluid from the branch pipe into the hollow portion is detachably connected to the cleaning member.

  According to this, the cleaning member is pushed out from the insertion cylinder into the main pipe, the fluid is injected into the hollow portion by the injection means to expand the diameter of the cleaning member, and then the injection means is removed from the cleaning member and collected, The insertion cylinder can be recovered from the branch pipe by the cylinder recovery means.

  As described above, according to the present invention, the cleaning member can be smoothly inserted from the branch pipe into the main pipe, and the cleaning member can be easily accommodated in the insertion cylinder with the diameter reduced. Further, the cleaning member can be smoothly and reliably pushed out from the insertion cylinder into the main pipe together with the cover body, and the injection means and the insertion cylinder can be collected.

It is a figure of a water pipe and its incidental equipment in an embodiment of the invention. It is sectional drawing of the ball | bowl for washing | cleaning used for the washing | cleaning in a water pipe. It is a perspective view of the cylinder for insertion used for the washing | cleaning in a water pipe. It is a figure of the jig | tool for extrusion used for the washing | cleaning in a water pipe same as the above, (a) is a front view, (b) is a XX arrow view in (a). It is a figure which shows the washing | cleaning method in a water pipe same as the above, and shows the process of reducing the diameter of the washing | cleaning ball | bowl and binding. 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 the cylinder for freezing. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of tightening a cylinder for freezing. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which took out the ball | bowl for washing | cleaning from the cylinder for freezing after freezing. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which covers a tube on the ball for washing | cleaning. It is a figure which shows the washing | cleaning method in a water pipe same as the above, and shows the process which inserts the ball | bowl for washing | cleaning into the cylinder for insertion. It is a figure which shows the washing | cleaning method in a water pipe, and is a partially notched perspective view of the cylinder for insertion which inserted the ball | bowl for washing | cleaning. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which inserts the cylinder for insertion. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which inserts the cylinder for insertion in the top part of a water pipe. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which pushes out the ball | bowl for washing | cleaning from a cylinder for insertion to a water pipe. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process which collect | recovers tubes. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of inflating the washing | cleaning ball | bowl. It is a figure which shows the washing | cleaning method in a water pipe same as the above, and shows the process of transferring the ball | bowl for 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 process in which the washing | cleaning ball | bowl reached | attained the branch pipe of the arrival side. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of crushing and collect | recovering the washing | cleaning balls.

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. . 1, 12, and 17 to 19, the on-off valves 2 and 3 are displayed in black when they are closed, and are displayed in white when they are open.

  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. An upstream start side fire hydrant part 5 and a downstream arrival side fire hydrant part 6 are provided in the water cutoff section 4. Both fire hydrants 5, 6 are branched pipes 7, 8 branched from the top of the water pipe 1, ball-type repair valves 9, 10 connected to the upper ends of the branch pipes 7, 8, 10 and fire hydrants 11 and 12 connected to the upper end.

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

  As shown in FIG. 17, 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 inflatable / contractible cleaning ball 22 (an example of a cleaning member) shown in FIG. 2, an insertion cylinder 23 shown in FIG. Bar 24 (an example of a cylinder collecting means), a polyethylene thin and flexible tube 25 (an example of a cover body) shown in FIG. 9, a tube collecting wire 26 (for example, a string), and water 27 ( An injection means 28 for injecting an example of fluid into the cleaning ball 22, the connecting short pipes 53 and 54 shown in FIG. 17, an emergency ball recovery means 29 for recovering the cleaning ball 22 in an emergency, and a drain means 30, an extrusion jig 31 shown in FIG. 4, and a trough 61 (crushing means) for crushing and collecting the cleaning balls 22 as shown in FIG. 18.

  As shown in FIG. 2, the cleaning ball 22 is made of rubber (elastic material) 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. The water injection port 35 is provided with a backflow prevention mechanism (not shown) such as a valve for preventing water 27 (an example of fluid) injected from the water injection port 35 into the hollow portion 32 from flowing out to the outside. .

  Further, the injection means 28 has a water injection hose 37 and a water injection pump 38 for sending water 27 in a tank (not shown) to the water injection hose 37. The water injection hose 37 has flexibility, and its tip is detachably connected to the water injection port 35 of the cleaning ball 22.

  As shown in FIG. 3, the insertion cylinder 23 is a metal cylinder that is open at both ends, and has an outer diameter that can be inserted into the branch pipe 7 from the starting connection short pipe 53 through the open repair valve 9. have. The cylinder entry / exit rod 24 is a thin metal rod, and is connected to the upper end of the insertion cylinder 23. Note that a stopper 36 is provided on the upper part of the cylinder loading / unloading bar 24.

  As shown in FIG. 4, the extrusion jig 31 is provided between two parallel bars 48, a connecting member 49 provided between the upper parts of both bars 48, and a lower part of both bars 48. And an extruded plate 50. The extruded plate 50 is circular and has a radial cutout 51 extending from the center to the outer peripheral surface.

As shown in FIG. 9, one end of the tube 25 is open, and the tube collection wire 26 has flexibility and is connected to the upper end of the tube 25.
As shown in FIG. 12, the starting connection short pipe 53 is detachable from the upper end of the starting repair valve 9, and the reaching connection short pipe 54 is detachable from the upper end of the reaching repair valve 10. .

  As shown in FIG. 17, the emergency ball collection means 29 includes a collection rope 40 (collection rope) connected to the cleaning ball 22, and a winding device 41 that winds and sends the collection rope 40. have. The winding device 41 includes a connection frame 42 that is detachable at the upper end of the starting short connection tube 53, and an electric reel 43 with a counter provided at the upper end of the connection frame 42. The connection frame 42 is provided with a plurality of pulleys 44 for guiding the recovery rope 40.

  The drainage means 30 has a drainage connection pipe 45 detachably attached to the upper end of the connection short pipe 54 on the reaching side, and a drainage hose 46 connected to the drainage connection pipe 45. The drainage connection pipe 45 is a T-shaped pipe, and the upper end opening of the drainage connection pipe 45 is closed by a detachable closing lid 60.

As shown in FIG. 18, the flange 61 has a configuration in which a pointed protruding member 63 is provided at the tip of a rod-shaped member 62.
Next, a cleaning method for cleaning the inner surface of the water pipe 1 using the cleaning device 21 will be described.

Before the water pipe 1 is cleaned at the work site, the following preparatory work is performed in advance at a place other than the work site (for example, in a factory).
(1) As shown in FIG. 5, the cleaning ball 22 is contracted (reduced) to a predetermined outer diameter D1 and tied with a rope 55. In this state, the cleaning ball 22 is immersed in water to sufficiently absorb the cleaning ball 22.

  (2) Next, as shown in FIG. 6, the cleaning ball 22 is inserted into the split refrigeration cylinder 56, and the inner diameter of the refrigeration cylinder 56 is smaller than the predetermined outer diameter D1. As shown in FIG. 7, the freezing cylinder 56 is tightened with a plurality of tightening bands 57 to further reduce the diameter of the cleaning ball 22 until the predetermined dimension D2 is reached. The freezing cylinder 56 is formed by forming a single slit 58 in the longitudinal direction in a vinyl chloride tube.

(3) Thereafter, the cleaning ball 22 is placed in a freezer together with the freezing cylinder 56 to be frozen.
(4) After sufficiently freezing, the cleaning ball 22 is taken out of the freezer together with the freezing cylinder 56, and the cleaning ball 22 is taken out of the freezing cylinder 56 and the rope 55 is removed as shown in FIG.

  (5) As shown in FIG. 9, the tube 25 is covered on the outer surface of the frozen cleaning ball 22 with a reduced diameter, the tip of a water injection hose 37 is connected to the water injection port 35 of the cleaning ball 22, and the recovery rope The tip of 40 is connected to the cleaning ball 22. At this time, the water injection hose 37 and the recovery rope 40 are connected to the cleaning ball 22 through a hole (not shown) formed in the tube 25.

  (6) A lubricant is applied to the outer surface of the tube 25 as shown in FIG. 10, and the cleaning ball 22 is placed in the insertion cylinder 23 together with the tube 25 as shown in FIG. At this time, the cleaning ball 22 is in a frozen state, and the outer diameter D2 of the cleaning ball 22 is set to a value smaller than the inner diameter D3 of the insertion tube 23. It can be easily inserted into the insertion tube 23.

The above (1) to (6) are preparatory work, and after performing the preparatory work, the cleaning balls 22 are thawed as time passes.
(7) Next, as shown in FIG. 12, 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 53 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 54. At this time, both repair valves 9 and 10 are left open.

  (8) After the cleaning ball 22 in the insertion cylinder 23 is thawed, the insertion cylinder 23 is inserted into the branch pipe 7 from the starting side (upstream side) connecting short pipe 53, and the cylinder entry / exit rod 24 Is pushed down into the branch pipe 7, as shown in FIG. 13, the insertion tube 23 is moved from the branch pipe 7 to the top of the water pipe 1 (an example of a connecting communication part between the branch pipe 7 and the water pipe 1). insert. At this time, the stopper 36 engages with the upper end of the connecting short pipe 53 on the starting side from above. Moreover, the position of the pipe top part of the water pipe 1 is measured and confirmed in advance. Further, the outer diameter D 4 of the insertion cylinder 23 is smaller than the flow path in the repair valve 9 and the inner diameters of the branch pipe 7 and the connecting short pipe 53.

  (9) Next, as shown in FIG. 4 and FIG. 14, the extrusion jig 31 is inserted into the branch pipe 7 from the connecting short pipe 53 on the starting side with the extrusion plate 50 facing downward, and is inserted with the extrusion plate 50. The upper end of the cleaning ball 22 in the cylinder 23 is pushed downward, and the cleaning ball 22 is pushed out together with the tube 25 from the insertion cylinder 23 into the water pipe 1.

  At this time, since the stopper 36 is engaged with the upper end of the connecting short pipe 53 on the starting side from above, it is possible to prevent the insertion cylinder 23 from falling into the water pipe 1 from the branch pipe 7. 4B, the tube collection wire 26, the water injection hose 37, and the collection rope 40 are inserted into the cutout portion 51 of the extruded plate 50, thereby collecting the tube. The wire rod 26, the water injection hose 37, and the recovery rope 40 are prevented from being pinched between the inner peripheral surface of the insertion tube 23 and the outer peripheral surface of the extrusion plate 50 or between the extrusion plate 50 and the cleaning ball 22. be able to.

  Further, when the cleaning ball 22 is pushed out from the insertion tube 23 into the water pipe 1 using the pushing jig 31 as described above, the pushing jig 31 may be pushed down only by the operator's human power. Alternatively, in order to reduce the labor of the operator, the pushing jig 31 may be pushed down using an auxiliary instrument such as a lever block.

  Thus, after inserting the insertion cylinder 23 containing the cleaning ball 22 and the tube 25 in a reduced diameter state from the branch pipe 7 into the top of the water pipe 1, the cleaning ball 22 is attached together with the tube 25. By pushing out from the insertion tube 23 into the water pipe 1, the cleaning ball 22 can be smoothly inserted into the water pipe 1 from the branch pipe 7.

  At this time, since the lubricant is applied to the outer surface of the tube 25, the frictional resistance between the tube 25 and the insertion tube 23 is reduced, whereby the cleaning ball 22 and the tube 25 together with the tube 25 are inserted from the insertion tube 23 into the water pipe. 1 can be pushed out smoothly and reliably.

  (10) Next, after the extrusion jig 31 is pulled up from the branch pipe 7 and pulled out from the starting short connection pipe 53, the tube collection wire 26 is pulled upward as shown in FIG. Is pulled up into the branch pipe 7 and recovered upward from the connecting short pipe 53 on the starting side.

  (11) As shown in FIGS. 2 and 16, the water injection pump 38 is operated, and a predetermined amount of water 27 in the tank is injected from the water injection hose 37 into the hollow portion 32 through the water injection port 35 of the cleaning ball 22. Thus, the diameter of the cleaning ball 22 is increased. 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.

  (12) After pulling the water injection hose 37 upward to remove the tip of the water injection hose 37 from the water injection port 35 of the cleaning ball 22, the water injection hose 37 is connected from the branch pipe 7 to the start side connecting short pipe Collect above 53. Further, by pulling up the cylinder loading / unloading rod 24, the insertion cylinder 23 is collected from the branch pipe 7 to the start side of the connection short pipe 53.

  As a result, the operation of inserting the cleaning ball 22 into the water pipe 1 and expanding the diameter is completed, and the cleaning ball 22 is inserted from the branch pipe 7 having a smaller inner diameter into the water pipe 1 having a larger inner diameter than the branch pipe 7. be able to.

  (13) Next, as shown in FIG. 17, the lower end flange of the connection frame 42 of the emergency ball collection means 29 is joined to the upper end flange of the connection side short tube 53 on the start side. At this time, the space between the lower end flange of the connection frame 42 and the upper end flange of the connection-side short pipe 53 is sealed with a sealing material (not shown) such as a gasket, and the lower end flange of the connection frame 42 and the recovery rope The space between the two is sealed with a sealing material (not shown) such as packing.

(14) The drainage connection pipe 45 is connected to the upper end of the connection side short pipe 54, and the drainage hose 46 is connected to the drainage connection pipe 45.
(15) The upstream on-off valve 2 is opened while the downstream on-off valve 3 remains closed. As a result, the water in the water pipe 1 flows from the on-off valve 2 to the cleaning target section 17 of the water pipe 1, and passes through the branch pipe 8 on the arrival side through the repair valve 10, the connection short pipe 54, and the drainage connection pipe 45. And drained to the drainage hose 46. 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 40 of the emergency ball recovery means 29 is sent out from the reel 43 along with the transfer of the cleaning ball 22.

  (16) As shown in FIG. 18, when the cleaning ball 22 reaches directly below the branch pipe 8 on the arrival side, the upstream on-off valve 2 is closed and the cleaning target section 17 is shut off. The position of the cleaning ball 22 in the water pipe 1 can be determined by measuring the delivery length of the collection rope 40 with the counter of the reel 43.

  Thereafter, the closing lid 60 is removed from the upper end opening of the drainage connection pipe 45, the rod 61 is inserted into the branch pipe 8 on the arrival side from the upper end opening of the drainage connection tube 45, and the cleaning ball is inserted at the tip of the rod 63. Pierce 22 and crush.

  (17) Next, as shown in FIG. 19, a flange lid 64 having a through hole 64 a at the center is attached to the upper end of the drainage connection pipe 45. At this time, the rod-like member 62 of the flange 61 is inserted through the through hole 64 a of the flange lid 64. The space between the rod-shaped member 62 and the inner peripheral surface of the through hole 64a is sealed with a sealing material such as packing.

  Then, the on-off valve 2 on the upstream side is opened, and the water in the water pipe 1 is passed through the drainage hose 46, and the crushed cleaning ball 22 is passed to the upper end opening of the drainage connection pipe 45 with the rod 61. Pull up. Thereafter, the on-off valve 2 is closed to cut off the water to be cleaned 17, the flange lid 64 is removed from the drainage connection pipe 45, and the crushed cleaning ball 22 is taken out from the upper end opening of the drainage connection pipe 45 and collected. . Thereby, the cleaning operation of the water pipe 1 is completed.

  If the cleaning ball 22 is crushed in the middle of the cleaning target section 17 before reaching the branch pipe 8 on the arrival side, the reel 43 of the emergency ball recovery means 29 is operated to recover the recovery rope 40. , The cleaning ball 22 can be pulled back to the starting branch pipe 7 and collected from the connecting short pipe 53.

After completion of the cleaning operation, the emergency ball collecting means 29, the drainage means 30, and both the connecting short pipes 53 and 54 are removed, and both the fire hydrants 11 and 12 and the both lids 15 and 16 are attached as shown in FIG.
In the above embodiment, in the cleaning method (6), the lubricant is applied to the outer surface of the tube 25, and the cleaning ball 22 is housed in the insertion tube 23 together with the tube 25. The cleaning ball 22 together with the tube 25 may be stored in the insertion tube 23. Further, the lubricant may be applied to both the outer surface of the tube 25 and the inner surface of the insertion cylinder 23.

  If the lubricant is directly applied to the outer surface of the cleaning ball 22 without using the tube 25 and then the cleaning ball 22 is placed in the insertion tube 23, the lubricant adheres to the insertion tube 23 and is cleaned. There is a possibility that the ball 22 cannot be pushed out from the insertion tube 23 into the water pipe 1.

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.
In the above embodiment, the water pipe 1 is cleaned using the branch pipes 7 and 8 for the fire hydrant. However, the water pipe 1 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.

  In the above embodiment, as shown in FIGS. 18 and 19, the cleaning ball 22 is crushed and recovered using the basket 61, but the recovery method of the cleaning ball 22 is limited to the above method. However, it may be recovered by another method.

1 water pipe (main pipe)
7 Branch pipe 21 Cleaning device 22 Cleaning ball (cleaning member)
23 Insertion tube 24 Tube entry / exit bar (cylinder recovery means)
25 Tube (cover body)
27 Water (fluid)
28 Injection means 31 Extrusion jig 32 Hollow part

Claims (5)

A cleaning method for the inner surface of a pipe, in which a cleaning member made of an elastic material having a hollow portion inside is inserted into a main pipe from a branch pipe, and the inner surface of the main pipe is cleaned,
Put the cleaning member in the insertion tube with the diameter reduced,
With the flow in the main pipe blocked, insert the insertion cylinder from the branch pipe into the connection communication section between the branch pipe and the main pipe,
Push the cleaning member from the insertion tube into the main tube,
Injecting fluid into the hollow part to expand the diameter of the cleaning member,
A fluid is flowed from the upstream side in the main pipe , the cleaning member is transferred to the downstream side in the main pipe, and the cleaning member slides on the inner surface of the main pipe to clean the inner surface of the main pipe. How to clean the inside of the tube. Reduce the diameter of the cleaning member to attach water to the cleaning member,
Put the cleaning member with water in the insertion tube in a frozen state,
The method for cleaning an inner surface of a pipe according to claim 1, wherein after the cleaning member has been thawed, the insertion cylinder is inserted from the branch pipe into the connection communication portion. Cover the cleaning member with a thin cover with the cleaning member reduced in diameter,
Apply a lubricant to at least one of the inner surface of the insertion tube and the outer surface of the cover body,
Put the cleaning member together with the cover in the insertion tube,
After inserting the insertion tube from the branch pipe into the connection communication part with the flow in the main pipe blocked,
Extrude the cleaning member together with the cover from the insertion tube into the main tube,
The cover body is collected from the main pipe through the branch pipe,
3. The method for cleaning an inner surface of a pipe according to claim 1, wherein the diameter of the cleaning member is increased by injecting a fluid into the hollow portion. The method for cleaning an inner surface of a pipe according to any one of claims 1 to 3, wherein an extrusion jig is inserted into the branch pipe, and the cleaning member is pushed out from the insertion cylinder into the main pipe. . A pipe inner surface cleaning apparatus used in the cleaning method according to any one of claims 1 to 4,
A cylinder collecting means for collecting the insertion cylinder from the branch pipe is connected to the insertion cylinder,
An apparatus for cleaning an inner surface of a pipe, characterized in that an injection means for injecting a fluid from the branch pipe into the hollow portion is detachably connected to the cleaning member.

Images