JP2014223562A - Pipe inner cleaning member and recovery method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe inner cleaning member easily recoverable from the inside of a cleaning object pipe.SOLUTION: A body part 30 comprises a freely expandable and contractible inner member 38 and an outer member 39 for covering the outer periphery of the inner member 38 and cleaning a pipe inner surface by contacting with an inner surface of a cleaning object pipe, and a first recovery wire rod 31 is connected to the outer member 39 for recovering through an introduction part from the inside of the cleaning object pipe by pulling the body part 30 to the upstream side, and self-discharge means 33 is provided for discharging liquid in the inner member 38 from a hole, by boring the hole in the inner member by using force of a pipe inner fluid acting on the body part 30, when the body part 30 stops in the cleaning object pipe since the first recovery wire rod 31 is caught in the cleaning object pipe.

Description

  The present invention relates to an in-pipe cleaning member that cleans the inner surface of a pipe to be cleaned, such as an embedded water pipe, and a recovery method that recovers the in-pipe cleaning member during cleaning.

  Conventionally, as this type of in-pipe cleaning member, as shown in FIG. 12, for example, an expandable / contractible elastic sphere 102 having a hollow portion 101 into which water is injected, and an outer circumference of the elastic sphere 102 and a pipe to be cleaned 103, and a scraping material 104 for cleaning the inner surface of the pipe in contact with the inner surface of 103. The elastic sphere 102 is made of a rubber ball, and the scraping material 104 is made of urethane foam. A collection wire 106 is connected to the elastic sphere 102 via a locking tool 105.

A method for cleaning the inside of the pipe 103 to be cleaned using such a pipe cleaning member 107 will be described below.
As shown in FIG. 13, the in-pipe cleaning member 107 is introduced into the cleaning target pipe 103 from the introduction connecting pipe 108 in a state where the in-pipe cleaning member 107 is contracted. Next, as shown in FIG. 14, water is injected from the water injection hose 109 into the elastic sphere 102 to expand the elastic sphere 102, and the in-pipe cleaning member 107 is expanded in diameter. As shown in FIG. 15, the upstream valve 110 is opened to feed water from the upstream side of the cleaning target pipe 103 to the cleaning section A and drain from the cleaning section A through the extraction connecting pipe 111. While the cleaning member 107 in the pipe moves downstream in the cleaning target pipe 103 due to the water flow in the cleaning target pipe 103, the scraping material 104 removes deposits such as scale and manganese adhering to the inner surface of the cleaning target pipe 103. By scraping off, the inside of the pipe 103 to be cleaned is cleaned. As the in-pipe cleaning member 107 moves downstream in the cleaning target pipe 103, the recovery wire 106 is sent from the wire reel 112 into the cleaning target pipe 103.

  As shown in FIG. 16, when the pipe cleaning member 107 reaches the end of the cleaning section A, the upstream valve 110 is closed, and a crushing jig (not shown) such as a tub is inserted into the connecting pipe 111 for removal. Then, the diameter of the tube cleaning member 107 is reduced by damaging the elastic sphere 102 of the tube cleaning member 107 with the crushing jig and discharging the water in the elastic sphere 102. Thereafter, as shown in FIG. 17, the in-pipe cleaning member 107 having a reduced diameter is taken out from the cleaning target pipe 103 through the extraction connecting pipe 111 to the ground.

  In the cleaning operation as described above, when the inner pipe cleaning member 107 moves to the downstream side in the cleaning target pipe 103 bent to the left and right, and the inner surface of the pipe is cleaned, the recovery wire 106 is cleaned. The in-pipe cleaning member 107 may stop in the middle of the cleaning section A due to being caught by a rust generated on the inner surface of 103 (the rust is raised in the shape of a knob) or the like.

  In this case, the in-pipe cleaning member 107 is pulled back to the upstream side by reversing the wire reel 112 and rewinding the recovery wire 106, and recovered from the cleaning target pipe 103 to the ground through the introduction connecting pipe 108.

  Incidentally, an internal / external dual-structure pipe cleaning member composed of the elastic sphere 102 and the scraping material 104 as described above and a recovery method thereof are described in, for example, Patent Document 1 below.

JP2011-101847

  However, in the above-described conventional type, since the in-pipe cleaning member 107 is stopped in the middle of the cleaning section A, the wire reel 112 is reversed to rewind the recovery wire 106, and the in-pipe cleaning member 107 is moved into the cleaning target pipe 103. When the pipe cleaning member 107 is expanded in the pipe 103 to be cleaned, the scraping material 104 is pressed against the inner surface of the pipe 103 to be cleaned, and the scraping material 104 and the pipe 103 to be cleaned are brought into contact with each other. The frictional resistance with the inner surface was large, and the recovery wire 106 had to be rewound to overcome this frictional resistance. Therefore, a great amount of labor is required for unwinding the recovery wire 106, and it is difficult to easily recover the in-pipe cleaning member 107 from the cleaning target pipe 103.

  An object of the present invention is to provide an in-pipe cleaning member that can be easily recovered from the inside of the pipe to be cleaned, and a method for recovering the same.

In order to achieve the above object, the first invention introduces the cleaning member in the tube into the cleaning target tube from the introducing portion in a contracted state.
Injecting liquid into the tube cleaning member to expand the diameter of the tube cleaning member,
This is an in-pipe cleaning member used in a cleaning method in which water is fed from the upstream side of a pipe to be cleaned and the inner surface of the pipe is cleaned while the pipe cleaning member is moved downstream of the pipe to be cleaned by the flow of fluid in the pipe to be cleaned. There,
The main body has an inflatable member that has a hollow portion into which liquid is injected, and an outer member that covers the outer periphery of the inner member and contacts the inner surface of the tube to be cleaned to clean the inner surface of the tube,
The external material is connected to the first collection wire that pulls the main body portion upstream and collects it from the inside of the pipe to be cleaned through the introduction portion,
When the first recovery wire is caught in the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, a hole is formed in the inner member using the force of the fluid in the pipe acting on the main body, and the liquid in the inner member is removed. Self-discharge means for discharging from the hole is provided.

  According to this, the main body part of the pipe cleaning member is introduced into the cleaning object pipe from the introduction part in a contracted state, the liquid is injected into the inner member to expand the diameter of the main body part, and from the upstream side of the cleaning target pipe The outer member is brought into contact with the inner surface of the pipe to be cleaned by feeding water and feeding the first recovery wire into the pipe to be cleaned while moving the main body to the downstream side of the pipe to be cleaned by the flow of fluid in the pipe to be cleaned. Clean the inside of the tube.

  In the above-described cleaning operation, when the first recovery wire is caught by an adherent (for example, rust) on the inner surface of the pipe to be cleaned and the main body stops in the pipe to be cleaned, the self-discharge means A hole is formed in the inner member using the force of the fluid in the tube acting on the liquid, and the liquid in the inner member is discharged from the hole. As a result, the inner member contracts and the main body portion contracts, so that the outer member does not press against the inner surface of the tube to be cleaned, and the frictional resistance between the outer member and the inner surface of the tube to be cleaned is reduced. Thereby, the 1st collection | recovery wire can be rewound, a main-body part can be pulled back upstream, and it can collect | recover easily from a washing | cleaning object pipe | tube through an introducing | transducing part.

In the pipe cleaning member in the second invention, the self-discharge means is composed of a rupture wire that tears the inner member to open a hole,
The rupture wire is connected to the first recovery wire and the inner member in a relaxed state,
When the first recovery wire is caught in the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, the first recovery wire is detached from the outer member by the force of the fluid in the pipe acting on the main body, and the rupture wire is The inner member is torn to the downstream side.

  According to this, when the first recovery wire is caught on the deposit on the inner surface of the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, the first recovery wire is caused by the force of the fluid in the pipe acting on the main body. Is released from the outer member, and the rupture wire is pulled downstream to tear the inner member and make a hole in the inner member. Thereby, the liquid in the inner member is discharged from the hole, the inner member is contracted, and the main body portion is reduced in diameter, so that the outer member is not pressed against the inner surface of the cleaning target pipe, and the outer member and the inner surface of the cleaning target pipe are Frictional resistance is reduced.

The in-pipe cleaning member in the third invention is connected to the first recovery wire and the inner member in a state where the second recovery wire is loosened,
When the rupture wire is torn from the inner member after tearing the inner member, the inner member is connected to the first recovery wire via the second recovery wire.

  According to this, when the rupture wire is torn from the inner member after tearing the inner member, the inner member is connected to the first collection wire via the second collection wire, so the first collection By rewinding the wire rod, the reduced diameter main body portion can be pulled back to the upstream side and easily recovered from the pipe to be cleaned through the introducing portion.

The fourth invention is a method for recovering a pipe cleaning member at the time of pipe inner surface cleaning using the pipe cleaning member according to any one of the first to third inventions,
In a state where the main body part of the member for cleaning in the tube is contracted, the main body part is introduced into the pipe to be cleaned from the introduction part,
Injecting liquid into the inner member of the main body to expand the diameter of the main body,
Water is fed from the upstream side of the cleaning target pipe, and the inner surface of the cleaning target pipe is cleaned while moving the main body part to the downstream side of the cleaning target pipe by the flow of fluid in the cleaning target pipe.
During cleaning, when the first recovery wire is caught in the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, the self-discharge means opens a hole in the inner member to discharge the liquid in the inner member, Reduce the diameter of the body,
The first recovery wire is pulled to move the main body portion to the upstream side and recover from the cleaning target pipe through the introduction portion.

  According to this, the in-pipe cleaning member can be easily recovered from the inside of the pipe to be cleaned.

  As described above, according to the present invention, when the cleaning operation is performed, the first recovery wire is caught by the deposit on the inner surface of the pipe to be cleaned, and the main body portion of the pipe cleaning member is stopped in the pipe to be cleaned. Even in this case, the main body can be pulled back to the upstream side and can be easily recovered from the pipe to be cleaned through the introduction section.

It is a figure of a water pipe and its incidental equipment in an embodiment of the invention. It is the figure which installed the pipe cleaning apparatus in the water pipe. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of inserting the member for pipe cleaning in a water pipe. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of inflating the member for pipe cleaning. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of moving the pipe cleaning member to a downstream branch pipe. It is a partially cutaway side view of the member for pipe cleaning used for cleaning the inside of a water pipe. FIG. 6 is an enlarged cross-sectional view of a connection portion between the in-pipe cleaning member and the first recovery string. In the same manner, a state in which the first recovery string of the in-pipe cleaning member is caught by the deposit in the water pipe and the in-pipe cleaning member is stopped in the water pipe. FIG. 5 is an enlarged cross-sectional view showing a state where the ring of the in-pipe cleaning member is cut and the first recovery string is detached from the urethane sponge. FIG. 5 is an enlarged cross-sectional view showing a state in which a tear string of the ball cleaning member is pulled and a tear is generated in the ball. FIG. 6 is an enlarged cross-sectional view showing a state in which the rupture string of the in-pipe cleaning member is detached from the ball. It is sectional drawing of the member for pipe cleaning used for the washing | cleaning in the conventional water pipe. It is a figure which shows the washing | cleaning method in the conventional water pipe, and shows the process which inserts the member for pipe cleaning in a water pipe. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of inflating the member for pipe cleaning. It is a figure which shows the washing | cleaning method in a water pipe, and shows the process of moving the member for pipe cleaning to the downstream side. It is a figure which shows the washing | cleaning method in a water pipe, and shows the state which the member for pipe cleaning reached | attained the connection pipe for extraction. It is a figure which shows the washing | cleaning method in a water pipe same as the above, and shows the process of reducing and collecting the diameter of the member for pipe cleaning.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, reference numeral 1 denotes a water pipe (an example of a pipe to be cleaned) embedded in the ground, and the water pipe 1 is provided with an upstream on-off valve 2 and a downstream on-off valve 3. A cleaning section A is set between the on-off valve 2 and the downstream on-off valve 3. Each of the on-off valves 2 and 3 displays the closed state in black and the open state in white. The water pipe 1 has an upstream branch pipe 6 and a downstream branch pipe 7 branched upward, and connecting pipes 17 and 18 are connected to the branch pipes 6 and 7, respectively. Fire hydrants 10 and 11 are attached to the connection pipes 17 and 18 via repair valves 8 and 9, respectively. The repair valves 8 and 9, the fire hydrants 10 and 11, and the connection pipes 17 and 18 are disposed in fire hydrant spaces 12 and 13 (so-called fire hydrant box) dug in the ground. Note that the upper surface openings of the fire hydrant spaces 12 and 13 are closed by lids 14 and 15.

The upstream branch pipe 6, the connecting pipe 17, and the repair valve 8 form an introduction portion 19.
As shown in FIGS. 2 to 5, reference numeral 20 denotes a pipe cleaning device for cleaning the inside of the water pipe 1. The tube cleaning device 20 includes an in-tube cleaning member 21, a water injection device 22, an emergency recovery device 23, a drainage device 24, and a crushing jig 25.

  As shown in FIGS. 6 and 7, the in-pipe cleaning member 21 includes a main body 30, first and second recovery strings 31, 32 (an example of first and second recovery wires), and a rupture string. 33 (an example of a rupture wire) and a recovery guide string 34. The main body 30 includes a ball 38 (an example of an inner member) made of an elastic material such as rubber, and urethane that covers the outer periphery of the ball 38 and contacts the inner surface of the water pipe 1 to clean the inner surface of the pipe. And a sponge 39 (an example of an outer member). The ball 38 has a hollow portion 40 into which water (an example of a liquid) is injected, and a water injection port 44 for injecting water into the hollow portion 40.

  The first recovery string 31 is for pulling the main body 30 upstream and recovering it from the water pipe 1 through the introduction part 19, and its tip is connected to the urethane sponge 39 via the ring 41. Yes. The ring 41 is attached to the urethane sponge 39.

  A plurality of second recovery strings 32 (two in FIG. 6 and FIG. 7) are provided, and one end of each second recovery string 32 is loosened between the ball 38 and the urethane sponge 39. The second recovery string 32 is connected to the ball 38 at the other end of the first recovery string 31. The urethane sponge 39 has an external through hole 42, and the second recovery string 32 is drawn out from the inside of the urethane sponge 39 through the external through hole 42.

  The rupturing string 33 is a self-discharge means for making a hole in the ball 38 by using the force of the water flow in the tube acting on the main body 30, and the first recovery is performed in a state of being loosened between the ball 38 and the urethane sponge 39. The cord 31 and the ball 38 are connected. That is, small-diameter internal through-holes 43 are formed at two places (a plurality of places) of the ball 38, and both ends of the rupture string 33 pass through both the internal through-holes 43 and the external through-holes 42 from inside the ball 38. It is pulled out of the sponge 39 and connected to the tip of the first collection string 31. A rubber sheet 45 (seal member) that prevents water injected into the hollow portion 40 from leaking from the internal through-hole 43 to the outside of the ball 38 is bonded to the inner surface of the ball 38, and the rupture string 33 penetrates the rubber sheet 45.

The collection guide string 34 is connected to the urethane sponge 39 at a position substantially opposite to the connection position between the first collection string 31 and the urethane sponge 39.
As shown in FIGS. 3 and 4, the water injection device 22 is a device for injecting water into the ball 38 of the in-pipe cleaning member 21, and includes a pump 22a, a water injection hose 22b, and a tip of the water injection hose 22b. And a water injection needle 22c (see FIG. 6).

  As shown in FIGS. 2 and 3, the emergency recovery device 23 is a reel device that winds and sends out a recovery jig 50 detachably attached to the upstream repair valve 8 and the first recovery string 31. 51. The recovery jig 50 has a flange portion 50a that can be joined to the upstream repair valve 8, and water in the water pipe 1 leaks to the outside from between the first recovery string 31 and the flange portion 50a. In order to prevent this, the space between the first recovery string 31 and the flange portion 50a is sealed with a sealing material (not shown). The first recovery string 31 is kept movable in the longitudinal direction with respect to the sealing material.

  As shown in FIG. 2, the drainage device 24 includes a straight pipe portion 24a that is detachably attached to the downstream repair valve 9, a T-tube portion 24b that is connected to the upper end of the straight pipe portion 24a, and a T-tube portion 24b. A detachable lid 24c that closes the upper end opening of the T-tube portion 24b, and a drainage valve 24d provided at the branch end of the T-tube portion 24b.

As shown in FIG. 5, the crushing jig 25 ruptures the ball 38 of the in-tube cleaning member 21, and has a hook 25 b attached to the tip of an elongated rod-like member 25 a.
Hereinafter, a method for cleaning the water pipe 1 using the pipe cleaning device 20 will be described.

  As shown in FIG. 3, the upstream side open / close valve 2 and the downstream side open / close valve 3 are closed, the washing section A of the water pipe 1 is shut off, the fire hydrants 10, 11 are removed from the repair valves 8, 9, and the water injection device 22 and the emergency recovery device 23 are installed in the vicinity of the hydrant space 12 on the upstream side, and the drainage device 24 is attached to the repair valve 9 on the downstream side.

  The in-pipe cleaning member 21 in a state where the hollow portion 40 of the ball 38 is emptied and the main body portion 30 is contracted is prepared, and the water injection needle 22 c of the water injection device 22 is inserted into the water injection port 44 of the ball 38. Then, with the recovery jig 50 removed from the upstream repair valve 8, the upstream repair valve 8 is opened and the contracted main body 30 is inserted into the connecting pipe 17 from the upstream repair valve 8. Further, it is inserted into the water pipe 1 from the connection pipe 17. At this time, the main body 30 is connected to the reel device 51 of the emergency recovery device 23 via the first recovery string 31.

  Thereafter, the pump 22a is driven, and a predetermined amount of water is injected into the hollow portion 40 of the ball 38 through the water injection hose 22b. Thereby, as shown in FIG. 4, the ball | bowl 38 swells and the main-body part 30 is diameter-expanded. Next, the water injection hose 22b is pulled, the water injection needle 22c is pulled out from the water injection port 44 of the ball 38, and the water injection hose 22b is collected on the ground.

  Next, as shown in FIG. 2, the recovery jig 50 is connected to the upstream repair valve 8, the downstream on-off valve 3 is closed, the upstream and downstream repair valves 8, 9 are opened, With the drainage valve 24d opened and the lid 24c attached to the T-shaped pipe portion 24b, the upstream side open / close valve 2 is opened to feed water from the upstream side of the water pipe 1. Thereby, the water in the water pipe 1 flows through the cleaning section A, and then from the water pipe 1 to the downstream branch pipe 7, the connecting pipe 18, the repair valve 9, the straight pipe portion 24a of the drainage device 24, and the T-shaped pipe. It flows through the portion 24b and is discharged from the drain valve 24d.

  Thereby, a water flow is generated from the upstream side open / close valve 2 toward the downstream side open / close valve 3 in the cleaning section A in the water pipe 1. The main body 30 of the pipe cleaning member 21 moves in the water pipe 1 from the upstream side to the downstream side of the cleaning section A by the water flow, and the urethane sponge 39 contacts the inner surface of the water pipe 1 to clean the inner surface of the pipe. At this time, the first recovery string 31 is fed into the water pipe 1 from the reel device 51 as the main body 30 moves.

  When the main body 30 moves in the water pipe 1 and reaches the downstream branch pipe 7 as shown in FIG. 5, the upstream side opening / closing valve 2 is closed and the washing section A of the water pipe 1 is shut off. Then, the lid 24c of the drainage device 24 is removed to open the upper end opening of the T-shaped tube portion 24b. Thereafter, the crushing jig 25 is inserted into the T-shaped pipe portion 24b, the straight pipe portion 24a, the downstream repair valve 9, the connecting pipe 18, and the downstream branch pipe 7 from above, and the pipe cleaning member is inserted at the tip of the flange 25b. The ball 38 is ruptured by hitting the main body 30 of the ball 21.

  Thereby, the water in the ball 38 is discharged, the ball 38 is contracted, and the main body 30 is reduced in diameter. Then, the main body 30 is collected on the ground by hooking the main body 30 having a reduced diameter on the flange 25b and pulling up the flange 25b.

  In the cleaning operation as described above, as shown in FIG. 8, the first recovery string 31 is caught by an attachment 52 such as a rust that adheres to the inner surface of the place where the water pipe 1 is bent (curved) to the left and right. When the trouble that the main body 30 stops in the middle of the cleaning section A in the water pipe 1 occurs, the pipe cleaning member 21 is collected by the following method.

  That is, when the main body 30 stops in the middle of the cleaning section A in the water pipe 1 as described above, the main body 30 is pushed downstream by the force of the water flow in the water pipe 1 acting on the main body 30, Since the ring 41 is cut as shown in FIG. 9 without being able to withstand the pressing force at this time, the first recovery string 31 is detached from the urethane sponge 39, and as shown in FIG. Is pulled to tear the ball 38, and a hole 54 (a tear) is made in the ball 38.

The ring 41 is set to have such a strength as to be cut when the pressing force acting on the main body 30 when the main body 30 stops in the water pipe 1 as described above is equal to or higher than a predetermined pressing force. .
Since the hole 54 is formed in the ball 38, the water W in the ball 38 is discharged from the hole 54 as shown by the dotted arrow in FIG. Is not pressed against the inner surface of the water pipe 1, the frictional resistance between the urethane sponge 39 and the inner surface of the water pipe 1 is reduced, and the water flow in the water pipe 1 tries to move the ball 38 downstream. Is greatly reduced. Thereby, even if the urethane sponge 39 is torn, it is possible to prevent the ball 38 from moving to the downstream side with respect to the urethane sponge 39 and being separated from the urethane sponge 39.

  When the propulsive force of the ball 38 is greatly reduced as described above, the tension of the first recovery string 31 is greatly reduced, so that the ball 38 is torn in the water pipe 1 and the main body 30 is reduced in diameter. I can sense that I did it. Thereafter, the upstream side opening / closing valve 2 is closed, and the washing section A of the water pipe 1 is brought into a water shut-off state.

  Next, the first recovery string 31 is rewound by the reel device 51, the main body 30 is pulled back to the upstream side in the water pipe 1, and the introduction part 19 (that is, the upstream branch pipe 6 and the connecting pipe is connected from the water pipe 1 to the upstream side. 17 and the repair valve 8) can be easily recovered.

  After the rupturing string 33 tears the ball 38 as described above, as shown in FIG. 11, the rupture string 33 comes off the ball 38 without being able to withstand the force of the water flow in the water pipe 1. Even so, since the ball 38 is connected to the first recovery string 31 via the second recovery string 32, the diameter of the ball 38 is reduced by rewinding the first recovery string 31 with the reel device 51. The main body 30 can be pulled back to the upstream side in the water pipe 1 and can be easily recovered from the water pipe 1 through the introduction part 19.

  In the above embodiment, in the cleaning operation in the water pipe 1, as shown in FIG. 5, the ball 38 of the in-pipe cleaning member 21 is ruptured using the crushing jig 25, and then the diameter of the main body 30 is reduced. Is recovered by hooking it on the heel 25b, and after the ball 38 is ruptured by using the crushing jig 25, the tip of the recovery guide string 34 is pulled out from the upper end opening of the T-shaped tube portion 24b. The main body 30 may be pulled up and collected on the ground.

  In the above embodiment, as shown in FIGS. 6 and 7, two second collection strings 32 are provided, but one or a plurality of three or more may be provided. Further, although one rupture string 33 is provided, a plurality of lace strings 33 may be provided.

  In the above embodiment, as shown in FIG. 7, the first and second recovery strings 31, 32 are used as an example of the first and second recovery wires, and the rupture string 33 is used as an example of a rupture wire. However, a wire or the like may be used instead of these strings.

  In the above embodiment, as shown in FIG. 7, the ball 38 is used as an example of the inner member and the urethane sponge 39 is used as an example of the outer member. However, instead of the urethane sponge 39, a rubber sponge, a brush, or the like is used. Also good.

  In the said embodiment, as shown in FIG. 2, although the water pipe 1 was mentioned as an example of the pipe | tube to be cleaned, pipes other than the water pipe 1 may be used.

1 water pipe (pipe for washing)
19 Introduction part 21 In-pipe cleaning member 30 Main body part 31 First recovery string (first recovery wire)
32 Second recovery string (second recovery wire)
33 Rupture string (rupture wire, self-discharge means)
38 balls (inner member)
39 Urethane sponge (outer member)
40 Hollow portion 54 Hole W Water in ball (liquid in inner member)

Claims (4)

Introducing into the pipe to be cleaned from the introduction part in a contracted state for the pipe cleaning member,
Injecting liquid into the tube cleaning member to expand the diameter of the tube cleaning member,
This is an in-pipe cleaning member used in a cleaning method in which water is fed from the upstream side of a pipe to be cleaned and the inner surface of the pipe is cleaned while the pipe cleaning member is moved downstream of the pipe to be cleaned by the flow of fluid in the pipe to be cleaned. There,
The main body has an inflatable member that has a hollow portion into which liquid is injected, and an outer member that covers the outer periphery of the inner member and contacts the inner surface of the tube to be cleaned to clean the inner surface of the tube,
The external material is connected to the first collection wire that pulls the main body portion upstream and collects it from the inside of the pipe to be cleaned through the introduction portion,
When the first recovery wire is caught in the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, a hole is formed in the inner member using the force of the fluid in the pipe acting on the main body, and the liquid in the inner member is removed. An in-pipe cleaning member comprising self-discharge means for discharging from a hole. The self-discharge means consists of a rupture wire that tears the inner member and opens a hole,
The rupture wire is connected to the first recovery wire and the inner member in a relaxed state,
When the first recovery wire is caught in the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, the first recovery wire is detached from the outer member by the force of the fluid in the pipe acting on the main body, and the rupture wire is 2. The pipe cleaning member according to claim 1, wherein the member is pulled downstream to tear the inner member. The second recovery wire is loosened and connected to the first recovery wire and the inner member,
The inner member is in a state of being connected to the first recovery wire via the second recovery wire when the rupture wire is detached from the inner member after tearing the inner member. In-pipe cleaning member. A method for recovering a pipe cleaning member during pipe inner surface cleaning using the pipe cleaning member according to any one of claims 1 to 3,
In a state where the main body part of the member for cleaning in the tube is contracted, the main body part is introduced into the pipe to be cleaned from the introduction part,
Injecting liquid into the inner member of the main body to expand the diameter of the main body,
Water is fed from the upstream side of the cleaning target pipe, and the inner surface of the cleaning target pipe is cleaned while moving the main body part to the downstream side of the cleaning target pipe by the flow of fluid in the cleaning target pipe.
During cleaning, when the first recovery wire is caught in the pipe to be cleaned and the main body is stopped in the pipe to be cleaned, the self-discharge means opens a hole in the inner member to discharge the liquid in the inner member, Reduce the diameter of the body,
A method for recovering an in-pipe cleaning member, comprising: pulling the first recovery wire, moving the main body portion upstream, and recovering from the cleaning target pipe through the introduction section.

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