JP7434006B2 - Cylindrical member closing unit and cylindrical member closing method - Google Patents

Description

The present disclosure relates to a cylindrical member closing unit and a cylindrical member closing method.

Patent Document 1 discloses that when excavating the inside of a cylindrical earth retaining wall made of concrete, when a part of the earth retaining wall is damaged, a polymer is injected into the outside of the damaged part through an injection pipe. A technique is disclosed in which a polymeric material is supplied and the damaged portion of an earth retaining wall is plugged with the polymeric material expanded by groundwater.

Japanese Patent Application Publication No. 8-296236

By the way, there is a desire to close a predetermined position within a cylindrical member such as a pipe or a duct.
When closing a predetermined position within a cylindrical member using the technique disclosed in Patent Document 1, a large amount of time is required to supply the amount of polymer material necessary to close the inside of the cylindrical member.
For this reason, it may be difficult to close a predetermined position within the cylindrical member in a short time.

The present disclosure has been made to solve the above problems, and provides a cylindrical member closing unit and a cylindrical member closing method that can close a predetermined position within a cylindrical member in a short time. The purpose is to

In order to solve the above problems, a cylindrical member closing unit according to the present disclosure includes a water absorbent having an outer diameter that can form a cylindrical space between the water absorbing agent and the inner peripheral surface of the cylindrical member; A closure unit main body including a first storage bag disposed in a cylindrical member and housing the water-absorbing agent, the first housing bag housing the water-absorbing agent and having waterproofness; A first bag main body having an outer diameter larger than an inner diameter of the cylindrical member, and when supplying liquid to the water absorbing agent provided in the first bag main body and housed in the first bag main body. a liquid introduction part to be used, and the water absorbing agent, when swollen by the liquid, presses the entire inner circumferential surface of the cylindrical member at a predetermined position via the first bag body, and absorbs the liquid. is flowing inside the cylindrical member, one end is fixed to the closure unit main body, the other end is arranged outside the cylindrical member, and a first bag main body is disposed at the predetermined position. It further includes a string-like member.
A cylindrical member closing unit according to the present disclosure includes a water absorbing agent having an outer diameter capable of forming a cylindrical space between the inner circumferential surface of the cylindrical member and a water absorbing agent disposed within the cylindrical member, a first storage bag that stores the water absorbing agent; A first bag main body having a large outer diameter, and a liquid introduction part provided in the first bag main body and used for supplying liquid to the water absorbing agent housed in the first bag main body. The water absorbing agent, when swollen by the liquid, presses the entire inner circumferential surface of the cylindrical member at a predetermined position via the first bag body, and gas is contained in the cylindrical member. The liquid introduction part is a first opening formed in the first bag body, one end is connected to the first opening, and the other end is connected to the first opening. The closure unit body further includes a liquid supply pipe connected to a liquid supply source that supplies the liquid to the water-absorbing agent through an outer periphery in which the first storage bag containing the water-absorbing agent is disposed. The first storage bag has a columnar member including a surface, and the first storage bag is arranged so as to circumferentially surround the outer circumferential surface of the columnar member, and is fixed to the outer circumferential surface of the columnar member. The closing unit main body accommodates a dehydrating agent disposed inside the first bag main body, the dehydrating agent so that the water absorbing agent and the dehydrating agent are separated, and a second opening is formed. a second storage bag including a second bag main body having waterproof properties; and a second lid member removably attached to the second bag main body so as to close the second opening. The apparatus further includes a string-like member having one end fixed to the second lid member and the other end disposed outside the cylindrical member.

In order to solve the above problems, a method for closing a cylindrical member according to the present disclosure is a method for closing a cylindrical member in which a predetermined position within the cylindrical member is closed, the outer diameter of the cylindrical member being larger than the inner diameter. A step of preparing a cylindrical member closing unit having a cylindrical member closing unit including the first accommodating bag and a occluding unit body containing the water absorbing agent by accommodating the water absorbing agent in the first accommodating bag; a step of arranging the closing unit main body at a predetermined position; and after arranging the closing unit main body at the predetermined position, supplying a liquid to the water absorbing agent and swelling the water absorbing agent with the liquid; pressing the predetermined position within the cylindrical member with the absorbent , the liquid is flowing within the cylindrical member, one end is fixed to the first storage bag, and the other end is fixed to the first storage bag. A first string member is provided outside the tubular member, and in the step of arranging the closure unit main body, the first string member is arranged from the upstream side of the tubular member to the The first string-like member having a length that allows the closure unit main body to reach a predetermined position is disposed within the cylindrical member.
A method for closing a cylindrical member according to the present disclosure is a method for closing a cylindrical member in which a predetermined position within the cylindrical member is closed, and the method includes absorbing water into a first storage bag having an outer diameter larger than an inner diameter of the cylindrical member. a step of preparing a cylindrical member occluding unit including the first storage bag and a occluding unit main body containing the water-absorbing agent, and placing the occluding unit main body at a predetermined position within the cylindrical member; and after arranging the closing unit main body at the predetermined position, supplying a liquid to the water absorbing agent and swelling the water absorbing agent with the liquid, thereby arranging the predetermined position within the cylindrical member. pressing with the absorbent; the first storage bag stores the water absorbent, is waterproof, and has a first bag main body having an outer diameter larger than an inner diameter of the cylindrical member. and a first lid member removably attached to the first bag body so as to close a first opening formed in the first bag body, In the step of supplying liquid to the agent, a second string member, one end of which is fixed to the first lid member, is pulled from the outside of the cylindrical member to remove the first lid from the first bag body. Peel off the material.

According to the cylindrical member closing unit and the cylindrical member closing method of the present disclosure, a predetermined position within the cylindrical member can be closed in a short time.

FIG. 2 is a cross-sectional view of the cylindrical member closing unit according to the first embodiment of the present disclosure. FIG. 2 is a cross-sectional view schematically showing a state in which the closing unit main body is placed at a predetermined position in a pipe through which liquid flows. FIG. 2 is a cross-sectional view schematically showing a state in which a water-absorbing agent is swollen at a predetermined position in a pipe through which liquid flows to block the predetermined position. It is a flowchart for explaining the method for closing a cylindrical member according to the first embodiment. FIG. 7 is a cross-sectional view of a cylindrical member closing unit according to a modification of the first embodiment of the present disclosure. FIG. 7 is a cross-sectional view of a cylindrical member closing unit according to a second embodiment of the present disclosure. FIG. 2 is a cross-sectional view schematically showing a state in which a water-absorbing agent is swollen at a predetermined position in a pipe through which liquid flows to block the predetermined position. FIG. 2 is a cross-sectional view schematically showing a state in which water in a water-absorbing agent swollen by a dehydrating agent is dehydrated at a predetermined position in a pipe through which liquid flows. It is a flowchart for explaining the cylindrical member closing method concerning a 2nd embodiment. FIG. 7 is a cross-sectional view of a cylindrical member closing unit according to a third embodiment of the present disclosure. 11 is a cross-sectional view of the closure unit main body shown in FIG. 10 taken along _line B ₁ -B. FIG. 2 is a cross-sectional view schematically showing a state in which a water-absorbing agent is swollen at a predetermined position in a pipe through which liquid flows to block the predetermined position. FIG. 7 is a cross-sectional view of a cylindrical member closing unit according to a fourth embodiment of the present disclosure. FIG. 7 is a cross-sectional view of a cylindrical member closing unit according to a fifth embodiment of the present disclosure. FIG. 15 is a cross-sectional view of the closure unit main body shown in FIG. 14 in the C ₁ -C ₂ line direction. FIG. 7 is a cross-sectional view of a cylindrical member closing unit according to a sixth embodiment of the present disclosure. It is a sectional view of a cylindrical member closure unit concerning a 7th embodiment of this indication, and is a figure showing typically a state where a closure unit main body is arranged at a predetermined position in piping.

<First embodiment>
A cylindrical member closing unit 10 according to a first embodiment will be described with reference to FIGS. 1 to 3. In FIGS. 1 to 3, D represents the water-absorbing agent 21 and the radial direction of the pipe 2, which is an example of the cylindrical member 1 (hereinafter referred to as "radial direction D"), and L represents the occlusion that constitutes the cylindrical member occlusion unit 10. The length direction (hereinafter referred to as "length direction L") of the unit main body 11 is shown.
In FIGS. 1 and 2, R1 indicates the outer diameter of the water absorbing agent 21 before swelling (hereinafter referred to as "outer diameter R1"). In FIG. 2, B indicates the direction in which the liquid 3 flows.
2 and 3, A indicates a predetermined position of the pipe 2 (cylindrical member 1) (hereinafter referred to as "predetermined position A"), and R2 indicates the inner diameter of the pipe 2 (hereinafter referred to as "inner diameter R2"). There is. In FIGS. 1 to 3, the same components are given the same reference numerals.

(Overall configuration of cylindrical member closing unit)
The cylindrical member closing unit 10 is used to close a predetermined position A of the pipe 2 when the liquid 3 is flowing inside the pipe 2. For example, if the piping 2 is damaged and there is a location where liquid leaks occur, the predetermined position A is set upstream of the damaged position of the piping 2.
The cylindrical member closure unit 10 includes a closure unit main body 11 , a first string member 13 , and a second string member 16 .

(Overall configuration of the blockage unit body)
The closing unit main body 11 is placed at a predetermined position A in the pipe 2 when the predetermined position A of the pipe 2 through which the liquid 3 flows is closed. The closing unit main body 11 includes a water absorbing agent 21, a first storage bag 22, and a filter member 23.

(Composition of water absorbing agent)
The water-absorbing agent 21 is made of a water-absorbing material that swells by absorbing water contained in the liquid 3, and is housed in the first storage bag 22. As a material constituting the water absorbing agent 21, for example, a high molecular weight polymer can be used. When using a high molecular weight polymer as the water absorbing agent 21, a powder is used. In this case, the volume of the water absorbing agent 21 is approximately 1% of the volume of the first storage bag 22.
The water absorbing agent 21 is capable of forming a cylindrical space between it and the inner circumferential surface 2a of the piping 2 in an unswollen state, and when swollen, the water absorbing agent 21 can form a cylindrical space between the water absorbing agent 21 and the inner peripheral surface 2a of the piping 2 through the first storage bag 22. The outer diameter R1 is set such that the entire inner circumferential surface 2a at a predetermined position can be pressed. That is, the outer shape R1 can be set as appropriate depending on the water absorption characteristics of the water absorbing agent material constituting the water absorbing agent 21.

The shape of the water absorbing agent 21 corresponds to the shape of the internal space (space through which the liquid 3 flows) defined by the piping 2. Specifically, for example, when the internal space defined by the pipe 2 has a cylindrical shape, the water absorbing agent 21 can have a cylindrical shape.
Further, for example, when the shape of the internal space defined by the pipe 2 is a quadrangular prism shape, the shape of the water absorbing agent 21 can be made into a quadrangular prism shape.

(Configuration of first storage bag)
The first storage bag 22 includes a first bag main body 25 and a liquid introduction part 27.

(Configuration of first bag body)
The first bag body 25 accommodates the water-absorbing agent 21 and prevents the water-absorbing agent 21 from coming into contact with the liquid 3 flowing within the pipe 2 . Therefore, the first bag main body 25 is made of a waterproof material. As the material for the first bag body 25, for example, waterproof Cordura nylon, high density polyethylene, etc. can be used.

The first bag main body 25 is configured to have an outer diameter larger than an inner diameter R2 of the pipe 2. With such a configuration, it is possible to prevent the first bag main body 25 from tearing when the water absorbing agent 21 swells.

(Configuration of liquid introduction part)
The liquid introduction part 27 has a first opening 27A and a first lid member 28.
The first opening 27A is formed at the end 25A located on the upstream side of the piping 2 among the pair of ends 25A and 25B of the first bag main body 25 arranged in the length direction L. The first opening 27A functions as a liquid introduction port for supplying the liquid 3 to the water absorbing agent 21 housed in the first bag body 25.

The first lid member 28 is removably attached to the end 25A of the first bag body 25 so as to close the first opening 27A.
As the first lid material 28, a material that does not peel off when immersed in the liquid 3 but peels off when subjected to external force (pulling force from the upstream side of the pipe 2) is used. As the first lid material 28, for example, a seal can be used.

(Configuration of filter member)
The filter member 23 is provided inside the first bag body 25 so as to face the first opening 27A. The filter member 23 allows the liquid 3 to flow therethrough and suppresses outflow of the water absorbing agent 21.

(Effect of filter member)
By providing the filter member 23 having such a configuration, when the liquid 3 is supplied to the water absorbing agent 21, the water absorbing agent 21 is supplied to the outside of the first storage bag 22 through the first opening 27A. It becomes possible to suppress the outflow. As a result, after the liquid 3 is supplied to the water-absorbing agent 21, it is possible to secure the water-absorbing agent 21 necessary for blocking the piping 2 in the first storage bag 22, so that the piping 2 can be clogged with high accuracy. be able to.

The buoyancy of the closure unit main body 11 configured as described above is preferably ±1 Kg or less. In this way, by setting the buoyancy of the closing unit body 11 to ±1 kg or less, the frictional force generated between it and the inner peripheral surface 2a of the pipe 2 is reduced, and the closing unit body 11 is smoothly guided to the predetermined position A. can do.

(Configuration of first string member)
The first string member 13 has one end 13A fixed to the end 25A of the first bag main body 25, and the other end 13B disposed on the opposite side of the one end 13A.
The other end 13B is arranged outside the pipe 2 when the closing unit main body 11 is arranged at the predetermined position A. This allows the operator to pull the other end 13B of the first string member 13 by hand.
As the first string-like member 13, for example, a rope, a wire, or the like can be used.

(Effect of first string member)
By providing the first string-like member 13 having such a configuration, the length of the first string-like member 13 that corresponds to the length of the closure unit main body 11 reaching the predetermined position A from the upstream side of the pipe 2 is provided. By placing a part of the first string-like member 13 inside the pipe 2, the closing unit main body 11 can be placed at a predetermined position A within the pipe 2.

(Configuration of second string-like member)
The second string member 16 has one end 16A fixed to the outer surface (the surface exposed to the liquid) of the first lid member 28, and the other end 16B disposed on the opposite side of the one end 16A.
The other end 16B is placed outside the pipe 2 when the closing unit main body 11 is placed at the predetermined position A. This allows the operator to pull the other end 16B of the second string member 16 by hand.
As the second string-like member 16, for example, a rope, a wire, or the like can be used.

(Effects of the first lid material and second string member)
By having the first lid member 28 and the second string-like member 16 described above, after the closing unit main body 11 is placed at the predetermined position A, the second string-like member is inserted from the outside of the cylindrical member 1 (piping 2). 16 to peel off the first lid member 28 from the first bag body 25, and supply the liquid 3 flowing inside the cylindrical member 1 (piping 2) to the water absorbing agent 21 through the first opening 27A. By doing so, the water absorbing agent 21 can be swollen (that is, the predetermined position A can be closed).

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 10 of the first embodiment, the first cylindrical member closing unit 10 is arranged in the pipe 2 which is the cylindrical member 1, houses the water absorbing agent 21, and has an outer diameter larger than the inner diameter R2 of the pipe 2. By providing the storage bag 22, it becomes possible to place the water-absorbing agent 21 in the amount necessary to block the pipe 2 at a predetermined position A of the pipe 2 at one time. Thereby, the water absorbing agent 21 swollen by the liquid 3 can close the predetermined position A in the pipe 2 in a short time.

In the first embodiment, the pipe 2 was described as an example of the cylindrical member 1, but the cylindrical member 1 may also be a member in which a duct or a penetrate is formed, for example.

(Method for closing cylindrical member)
Next, a method for closing a cylindrical member according to a first embodiment using the cylindrical member closing unit 10 will be described with reference to FIGS. 1 to 4.

(Step shown in S1)
When the process shown in FIG. 4 is disclosed, in S1, the water absorbing agent 21 is accommodated in the first containing bag 22 having an outer diameter larger than the inner diameter of the piping 2. A cylindrical member closure unit 10 including a closure unit main body 11 including 21 is prepared.

(Step shown in S2)
Next, in S2, the closing unit main body 11 is placed at a predetermined position A in the pipe 2 through which the liquid 3 flows. Specifically, a portion of the first string member 13 corresponding to the length of the closure unit main body 11 reaching the predetermined position A from the upstream side of the pipe 2 is attached to the pipe 2. The closing unit main body 11 is placed at the predetermined position A by being placed inside.

At this time, since the liquid 3 is flowing in the direction B in the pipe 2, the closing unit main body 11 is moved along with this flow.
At this stage, since a space is formed between the inner peripheral surface 2a of the pipe 2 and the closure unit main body 11, the liquid 3 is flowing downstream of the predetermined position A.

(Effect of the process shown in S2)
By using the above method, the closing unit main body 11 having the water absorbing agent 21 necessary for blocking the predetermined position A of the pipe 2 is placed at the predetermined position A, and the necessary amount of water absorbing agent 21 is placed at the predetermined position A at one time. can be placed.

(Step shown in S3)
Next, in S3, the water absorbing agent 21 is swollen. Specifically, the operator peels off the first lid member 28 from the first bag body 25 by pulling the other end 16B of the second string-like member 16 from the outside of the pipe 2. As a result, the first opening 27A is opened, the liquid 3 flowing inside the pipe 2 flows into the first bag body 25, the water contained in the liquid 3 is absorbed by the water absorbing agent 21, and the water absorbing agent 21 swell. As the swelling of the water absorbing agent 21 progresses, the water absorbing agent 21 presses the entire inner circumferential surface 2a at the predetermined position A via the first bag main body 25. At this stage, a predetermined position A of the pipe 2 is closed. As a result, the process shown in FIG. 4 ends.

(Effect of the process shown in S3)
By swelling the water-absorbing agent 21 using the above method, an operator can pull the other end 16B of the second string-like member 16 from the outside of the pipe 2, and use the liquid 3 flowing through the pipe 2 to position it in a predetermined position. A can swell the water absorbing agent.

(Effect of cylindrical member closing method)
According to the cylindrical member closing method of the first embodiment, by arranging the closing unit main body 11 at a predetermined position A within the pipe 2, the amount required to close the pipe 2 at the predetermined position A within the pipe 2 is It becomes possible to arrange the water absorbing agent 21 at once. Thereby, the predetermined position A in the pipe 2 can be closed in a short time using the water absorbing agent 21 swollen by the liquid 3.

<Modification of the first embodiment>
Next, with reference to FIG. 5, a cylindrical member closing unit 30 according to a modification of the first embodiment will be described. In FIG. 5, the same components as those of the structure shown in FIG. 1 are given the same reference numerals.

(Configuration of cylindrical member closing unit)
A cylindrical member closing unit 30 according to a modification of the first embodiment has the same structure as the cylindrical member closing unit 10 of the first embodiment except that it further includes a resistance generating member 31. It is configured similarly to 10.

(Configuration of resistance generating member)
The resistance generating member 31 is provided on the outer circumferential surface 25a of the first bag body 25 that is pressed against the inner circumferential surface 2a of the pipe 2 (see FIG. 3). The resistance generating member 31 is configured to follow the displacement of the first bag body 25.
When the resistance generating member 31 is pressed against the inner peripheral surface 2a of the pipe 2, it generates resistance between the resistance generating member 31 and the inner peripheral surface 2a of the pipe 2.
As the resistance generating member 31, for example, it is possible to use thin, cylindrical rubber.

(Effects of the cylindrical member closing unit of the modified example of the first embodiment)
By providing the resistance generating member with such a configuration, the resistance generated between the inner circumferential surface 2a of the pipe 2 and the resistance generating member 31 after the predetermined position A is closed causes the pipe 2 to close from the predetermined position A. The movement of the closing unit main body 11 to the downstream side can be suppressed.

<Second embodiment>
A cylindrical member closing unit 40 according to a second embodiment will be described with reference to FIGS. 6 to 8. In FIGS. 6 to 8, the same components as those of the structure shown in FIGS. 1 to 3 are given the same reference numerals.

(Overall configuration of cylindrical member closing unit)
The tubular member closure unit 40 has a closure unit body 41 instead of the closure unit body 11 of the tubular member closure unit 10 of the first embodiment, and further includes a third string member 45. Other than this, the structure is similar to that of the cylindrical member closing unit 10.

(Configuration of the blockage unit body)
The closure unit body 41 has the same structure as the closure unit body 11 described in the first embodiment except that it further includes a dehydrating agent 42 and a second storage bag 43. .

(Composition of dehydrating agent)
The dehydrating agent 42 is contained within the first storage bag 22. The dehydrating agent 42 has a columnar shape. The dehydrating agent 41 is arranged so as to penetrate the center of the water absorbing agent 21 in the length direction L.
As the material constituting the dehydrating agent 42, for example, sodium chloride, potassium chloride, etc. can be used.

(Configuration of second storage bag)
The second storage bag 43 is accommodated within the first storage bag 22 and includes a second bag body 48, a second opening 48A, and a second lid member 49.
The second bag main body 48 is waterproof and accommodates the dehydrating agent 42 so that the water absorbing agent 21 and the dehydrating agent 42 are separated. The outer peripheral surface of the second bag main body 48 is surrounded by the water absorbing agent 21. The inner peripheral surface of the second bag body 48 is surrounded by a dehydrating agent 42.
The second opening 48A is formed in the second bag body 48 located on the first opening 27A side.

The second lid member 49 is attached to the outside of the second bag body 48 so as to close the second opening 48A. The second lid member 49 is configured to be detachable from the second bag body 48. The second lid member 49 prevents the water absorbing agent 21 and the dehydrating agent 42 from coming into contact with each other through the second opening 48A.
The buoyancy of the closure unit main body 41 configured as described above is preferably ±1 Kg or less.

(Configuration of third string member)
The third string member 45 has one end 45A fixed to the outer surface of the second lid member 49, and the other end 45B disposed on the opposite side of the one end 45A.
A portion of the third string member 45 located on the one end 45A side passes through the first lid member 28, the first opening 27A, and the filter member 23.
The other end 45B is arranged on the outside of the pipe 2 when the closing unit main body 11 is arranged at the predetermined position A. This allows the operator to pull the other end 45B of the third string member 45 by hand.
As the third string-like member 45, it is possible to use, for example, a rope, a wire, or the like.

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 40 of the second embodiment, by having the second lid member 49 and the third string member 45 described above, for example, the pipe located downstream of the predetermined position A can be closed. 2 is completed and it is no longer necessary to block the pipe 2 with the blockage unit main body 41, the third string-like member 45 is pulled from the outside of the pipe 2 and the second lid is removed from the second bag main body 48. By peeling off the material 49 and bringing the swollen water absorbing agent 21 into contact with the dehydrating agent 42 through the second opening 48A, it is possible to dehydrate the moisture contained in the swollen water absorbing agent 21 with the dehydrating agent 42. Become.

As a result, the outer diameter of the water-absorbing agent 21 that was pressing against the inner circumferential surface 2a of the pipe 2 through the first bag body becomes smaller than the inner diameter R2 of the pipe 2, so that the first string-like member 13 is The blockage unit main body 41 disposed inside the pipe 2 can be recovered by using this.

In addition, in the second embodiment, the case where the third string-like member 45 is arranged so as to pass through the first opening 27A and penetrate the filter member 23 has been described as an example. For example, the third string-like member 45 may be arranged to penetrate the first bag main body 25, and a waterproof sealing material may be arranged between the first bag main body 25 and the third string-like member 45. good.

With this configuration, the third string-like member 45 is not disposed in the first opening 27A and the filter member 23, so when the liquid 3 is caused to flow into the first bag body 25, It is possible to prevent the third string member 45 from getting in the way.

Further, the resistance generating member 31 described in the modification of the first embodiment may be provided on the outer circumferential surface 25a of the first bag body 25 constituting the closure unit body 41 of the second embodiment.

(Method for closing cylindrical member)
Next, a method for closing a cylindrical member according to a second embodiment using the cylindrical member closing unit 40 will be described with reference to FIGS. 6 to 9.

(Step shown in S1)
When the process shown in FIG. 9 is disclosed, in S1, in addition to the process explained in S1 shown in FIG. The bag includes a second bag body 48 in which an opening 48A is formed, and a second lid member 49 that is removably attached to the second bag body 48 so as to close the second opening 48A. By housing the second storage bag 43 in the first storage bag 22, the cylindrical member closure unit 40 including the closure unit main body 41 is prepared.

(Step shown in S2)
Next, in S2, the closing unit main body 41 is placed at the predetermined position A by performing a process similar to that described in S2 shown in FIG.

(Step shown in S3)
Next, in S3, the predetermined position A of the pipe 2 is blocked by performing the same process as that described in S2 shown in FIG.

(Step shown in S4)
The step shown in S4 is, for example, a step performed after there is a damaged portion of the pipe 2 downstream of the predetermined position A and the damaged portion is repaired.
In S4, the other end 45B of the third string member 45 whose one end 45A is fixed to the second lid 49 is pulled from the outside of the pipe 2, and the second lid 49 is removed from the second bag body 48. After peeling off, the moisture contained in the swollen water-absorbing agent 21 is dehydrated by the dehydrating agent 42 through the second opening 48A.
As a result, the outer diameter of the water-absorbing agent 21 that presses the inner peripheral surface 2a of the pipe 2 becomes smaller, and a gap is formed between the inner peripheral surface 2a of the pipe 2 and the closing unit main body 41.

(Step shown in S5)
Next, in the step shown in S5, the other end 13B of the first string-like member 13 is pulled from the outside of the pipe 2 to collect the closing unit main body 41 outside the pipe 2. Thereby, the process shown in FIG. 9 ends.

(Effect of cylindrical member closing method)
According to the cylindrical member closing method of the second embodiment, the piping is After forming a gap between the inner peripheral surface 2a of the liquid 3 and the water absorbing agent 21 surrounded by the first storage bag 22, the unnecessary closing unit main body 41 is collected from inside the pipe 2 through which the liquid 3 flows. I can do it.

<Third embodiment>
A cylindrical member closing unit 60 according to a third embodiment will be described with reference to FIGS. 10 to 12. In FIGS. 10 to 16, the same components as those of the structure shown in FIGS. 1 to 3 are given the same reference numerals.

(Overall configuration of cylindrical member closing unit)
The cylindrical member closing unit 60 has a closing unit body 61 instead of the closing unit body 11 that constitutes the cylindrical member closing unit 10 of the first embodiment, and has one end 13A of the first string member 13. The structure is similar to that of the cylindrical member closing unit 10 except that it is connected to the end 63A of the columnar member 63 (the end disposed on the upstream side in the flow direction of the liquid 3).
The cylindrical member closing unit 60 is used to close a predetermined position A of the pipe 2 (one of the cylindrical members 1) through which the liquid 3 flows.

(Configuration of the blockage unit body)
The closing unit main body 61 is arranged at a predetermined position A in the pipe 2 when the predetermined position A of the pipe 2 through which the liquid 3 flows is closed.
The closing unit main body 61 is the same as the closing unit main body 11 except that it has a water absorbing agent 65 and a first storage bag 67 instead of the water absorbing agent 21 and the first storage bag 22, and further includes a columnar member 63. It is composed of

(Configuration of cylindrical member)
The columnar member 63 has a shape corresponding to the shape of the internal space (space through which the liquid 3 flows) defined by the piping 2 . Specifically, for example, when the internal space defined by the pipe 2 has a cylindrical shape, the columnar member 63 can have a cylindrical shape.
Further, for example, when the internal space defined by the pipe 2 has a quadrangular prism shape, the columnar member 63 can have a quadrangular prism shape.

The columnar member 63 has an outer peripheral surface 63a to which the inside of the first storage bag 67 is fixed. In a state where the closing unit main body 61 is disposed within the pipe 2, the outer circumferential surface 63a is a surface facing the inner circumferential surface 2a of the pipe 2.
In the pipe 2, one end 13A of the first string member 13 is connected to an end 63A of the columnar member 63 located on the upstream side.

As the material of the columnar member 63, for example, a metal material can be used. Further, when the columnar member 63 is immersed in the liquid 3, it is preferable to use stainless steel, which is not easily corroded, as the material of the columnar member 63, for example.

(Composition of water absorbing agent)
The water absorbing agent 65 has a cylindrical shape that can accommodate the columnar member 63 via the first accommodation bag 67 . That is, the water absorbing agent 65 is arranged so as to surround the outer circumferential surface 63a of the columnar member 63 via the first storage bag 67. The water absorbing agent 65 is made of the same material as the water absorbing agent 21 described in the first embodiment.
The thickness of the water-absorbing agent 65 in the radial direction D is such that when the water-absorbing agent 65 swells, it can press the inner circumferential surface 2a of the pipe 2 via the first storage bag 67.

(Configuration of first storage bag)
The first storage bag 67 includes a first bag body 68 and a liquid introduction part 27.

(Configuration of first bag body)
The first bag body 68 has a cylindrical shape that can accommodate the water absorbing agent 65. The first bag body 68 is fixed to the outer peripheral surface 63a of the columnar member 63. The first bag body 68 prevents the water absorbing agent 65 from coming into contact with the liquid 3 flowing inside the pipe 2 . Therefore, the first bag body 68 is made of a waterproof material. As the material for the first bag body 68, for example, waterproof Cordura nylon, high density polyethylene, or the like can be used.

The first bag main body 68 is configured to have an outer diameter larger than the inner diameter R2 of the pipe 2. With such a configuration, it is possible to prevent the first bag main body 68 from tearing when the water absorbing agent 65 swells.

(Configuration of liquid introduction part)
The first opening 27A constituting the liquid introduction section 27 is formed at an end 68A of the first bag body 68 located on the upstream side within the pipe 2.

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 60 of the third embodiment, the cylindrical member closing unit 60 includes the columnar member 63 having the above-mentioned configuration, and a tube containing the water absorbing agent 65 so as to circumferentially surround the outer circumferential surface 63a of the columnar member 63. By arranging one storage bag 67, it is possible to sufficiently secure the force with which the water absorbing agent 65 presses the inner circumferential surface 2a of the pipe 2.

Note that the resistance generating member 31 shown in FIG. 5 may be provided so as to surround the outer peripheral surface of the first bag main body 68 constituting the cylindrical member closing unit 60.
Further, the buoyancy of the closure unit main body 61 may be set to, for example, ±1 kg or less.

Further, the cylindrical member closing method using the cylindrical member closing unit 60 can be performed by a method similar to the cylindrical member closing method described in the first embodiment.

<Fourth embodiment>
With reference to FIG. 13, a cylindrical member closing unit 80 according to a fourth embodiment will be described. In FIG. 13, the same components as those of the structure shown in FIGS. 6 and 10 are given the same reference numerals.

(Configuration of cylindrical member closing unit)
The cylindrical member closing unit 80 is used to close a predetermined position A of the pipe 2 through which the liquid 3 flows shown in FIG. 12.
The tubular member closure unit 80 has a closure unit body 81 instead of the closure unit body 41 that constitutes the tubular member closure unit 40 of the second embodiment, and has one end of the first string member 13 shaped like a column. The tube is connected to the end 63A of the member 63, and the one end 45A of the third string member 45 is connected to the second lid member 88 (one of the components of the closure unit main body 81). It is configured similarly to the shaped member closing unit 40.

(Configuration of the blockage unit body)
The closure unit body 81 has the same structure as the closure unit body 61 described in the third embodiment except that it further includes a dehydrating agent 82 and a second storage bag 84. .

(Composition of dehydrating agent)
The dehydrating agent 82 is contained in the first storage bag 67. The dehydrating agent 82 has a cylindrical shape and accommodates the columnar member 63 inside. The dehydrating agent 82 is arranged between the columnar member 63 and the water absorbing agent 65.
As the material constituting the dehydrating agent 82, it is possible to use, for example, the same material as the material constituting the dehydrating agent 42 described above.

(Configuration of second storage bag)
The second storage bag 84 is accommodated within the first storage bag 67 and includes a second bag body 86, a second opening 86A, and a second lid member 88.
The second bag main body 86 is waterproof and has a cylindrical shape. The second bag main body 86 accommodates the dehydrating agent 82 so that the water absorbing agent 65 and the dehydrating agent 82 are separated. The outer peripheral surface of the second bag main body 86 is surrounded by the water absorbing agent 65.
The second opening 86A is formed in a portion of the second bag main body 86 that faces the water absorbing agent 65 in the radial direction D.

The second lid member 88 is attached to the outside of the second bag body 86 so as to close the second opening 86A. The second lid member 88 is configured to be detachable from the second bag body 86. The second lid member 88 prevents the water absorbing agent 65 and the dehydrating agent 82 from coming into contact with each other through the second opening 86A.
The second lid member 88 opens the second opening 86A when the other end 45B of the third string member 45 is pulled.

The buoyancy of the closure unit main body 81 configured as described above is preferably set to, for example, ±1 kg or less.

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 80 of the fourth embodiment, it is possible to ensure a sufficient force for the water absorbing agent 65 to press the inner circumferential surface 2a of the pipe 2, and there is no need for closing by the closing unit main body 81. When this happens, the blockage unit main body 81 can be recovered from the pipe 2 through which the liquid 3 flows.

Note that the resistance generating member 31 shown in FIG. 5 may be provided so as to surround the outer peripheral surface of the first bag main body 68 constituting the cylindrical member closing unit 80.

Further, the cylindrical member closing method using the cylindrical member closing unit 80 can be performed by a method similar to the cylindrical member closing method described in the second embodiment.

<Fifth embodiment>
A cylindrical member closing unit 90 according to a fifth embodiment will be described with reference to FIGS. 14 and 15. 14 and 15, the same components as those of the structure shown in FIG. 10 are given the same reference numerals.

(Configuration of cylindrical member closing unit)
The cylindrical member closing unit 90 is used when closing a predetermined position A of the pipe 2 through which the liquid 3 flows shown in FIG. 12.
The cylindrical member closing unit 90 is similar to the cylindrical member closing unit 60 except that it has a closing unit body 91 instead of the closing unit body 61 that constitutes the cylindrical member closing unit 60 of the third embodiment. It is configured.

(Configuration of the blockage unit body)
The closing unit main body 91 has a plurality of water absorbing agents 93 formed by dividing the water absorbing agent 65 that constitutes the closing unit main body 61, and further includes a plurality of third storage bags 92, a flow path member 95, The structure is similar to that of the cylindrical member closing unit 60 except that it includes the following.

(Configuration of third bag body)
The plurality of third storage bags 92 are accommodated within the first storage bag 67. The plurality of third storage bags 92 each contain a water absorbing agent 93.
The plurality of third storage bags 92 are arranged in the circumferential direction along the outer circumferential surface 63a of the columnar member 63 via the first storage bag 67. The insides of the plurality of third storage bags 92 are fixed to the first storage bag 67.
A third opening 92A is formed in a portion of the plurality of third storage bags 92 located on the first opening 27A side. A filter member 23 that suppresses outflow of the water absorbing agent 93 is arranged inside the third opening 92A.

(Configuration of channel member)
The flow path member 95 is housed in the first storage bag 67 and includes a ring-shaped flow path portion 97, a first cylindrical flow path portion 98, and a plurality of second cylindrical flow path portions 99. , has.
The ring-shaped channel portion 97 has an end of the first bag body 68 located on the side where the first opening 27A is formed and a plurality of third ends located on the side where the third opening 92A is formed. It is arranged in a ring-shaped space formed between the storage bag 92 and the end thereof. The ring-shaped channel portion 97 is arranged to surround the columnar member 63.

A ring-shaped channel 97A through which the liquid 3 (see FIG. 12) flows is formed in the ring-shaped channel portion 97. The ring-shaped flow path 97A is arranged so as to surround the columnar member 63. The ring-shaped flow path 97A is arranged to face the plurality of third openings 92A in the length direction L.

The first cylindrical flow path portion 98 is provided between the first opening 27A and one third opening 92A that faces the first opening 27A in the length direction L. A flow path 98A extending in the length direction L is formed in the first cylindrical flow path portion 98.

The flow path 98A connects the first opening 27A and the third opening 92A and communicates with the ring-shaped flow path 97A. When the first lid member 28 opens the first opening 27A, the liquid 3 (see FIG. 12) flowing inside the pipe 2 flows into the flow path 98A. The liquid 3 that has flowed into the flow path 98A passes through the third opening 92A to the water absorbing agent 93 housed in the third storage bag 92, which is partially connected to the first cylindrical flow path 98. At the same time, the remainder flows into the ring-shaped flow path 97A.

The second cylindrical channel portion 99 extends in the length direction L and is provided between the ring-shaped channel portion 97 and the third storage bag 92 . One end of the second cylindrical flow path section 99 is connected to the ring-shaped flow path section 97 . The other end of the second cylindrical flow path section 99 is connected to a third opening 92A that faces the second cylindrical flow path section 99 in the length direction L. A plurality of second cylindrical flow path portions 99 are arranged in the circumferential direction.

A flow path 99A extending in the length direction L is formed in the second cylindrical flow path portion 99. The flow path 99A communicates the third opening 92A with the ring-shaped flow path 97A. Thereby, the liquid flowing through the ring-shaped channel 97A is supplied to the water absorbing agent 93 housed in the third storage bag 92 via the channel 99A.
The plurality of water absorbing agents 93 swollen due to the supply of the liquid 3 press the inner circumferential surface 2a of the piping 2 via the first storage bag 67 and the third storage bag 92, so that the water absorbing agents 93 are swollen inside the piping 2. occlusion.

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 90 of the fifth embodiment, the water absorbing agent 93 divided into a plurality of parts is accommodated, and a plurality of third cylindrical members arranged in the circumferential direction along the outer circumferential surface 63a of the columnar member 63 are accommodated. By including the storage bag 92 and the channel member 95 that communicates the first opening 27A with the third opening 92A formed in each of the plurality of third storage bags 92, a plurality of water absorbing agents can be stored. Since the liquid 3 can be quickly supplied to the water absorbing agents 93, the plurality of water absorbing agents 93 can be swollen in a short time.

The cylindrical member closing method using the cylindrical member closing unit 90 configured as described above can be performed by a method similar to the cylindrical member closing method described in the first embodiment.

Note that the resistance generating member 31 shown in FIG. 5 may be provided so as to surround the outer peripheral surface of the first bag main body 68 constituting the cylindrical member closing unit 90.

<Sixth embodiment>
With reference to FIG. 16, a cylindrical member closing unit 110 according to a sixth embodiment will be described. In FIG. 16, the same components as those of the structure shown in FIGS. 13 and 14 are given the same reference numerals.

(Configuration of cylindrical member closing unit)
The cylindrical member closing unit 110 is used when closing a predetermined position A of the pipe 2 through which the liquid 3 flows shown in FIG. 12.
The cylindrical member occlusion unit 110 has the following features, except that it includes a occlusion unit body 111 and a third string member 112 instead of the occlusion unit body 91 that constitutes the cylindrical member occlusion unit 90 of the fifth embodiment. is configured similarly to the cylindrical member closing unit 90.

(Configuration of the blockage unit body)
The closure unit body 111 is different from the closure unit except that it further includes a plurality of second storage bags 101 and a plurality of dehydrating agents 103 in addition to the configuration of the closure unit body 91 described in the fifth embodiment. It is configured similarly to the main body 91.
Note that in the sixth embodiment, the third storage bag 92 is made of a material through which the liquid 3 can pass.

(Configuration of second storage bag)
The plurality of second storage bags 101 are accommodated within the first storage bag 67. The plurality of second storage bags 101 each have a second bag body 105 that stores the dehydrating agent 103, a second opening 105A, and a second lid member 107.
The second bag main body 105 is provided between the third storage bag 92 and the columnar member 63. The plurality of second bag bodies 105 are arranged in the circumferential direction of the columnar member 63 so as to face the third storage bag 92 in the radial direction D. The second bag body 105 is made of a material that does not allow the liquid 3 to pass through.

The second opening 105A is formed in the second bag main body 105 at a position facing the third storage bag 92.
The second lid member 107 is removably attached to the second bag body 105 so as to close the second opening 105A from the outside of the second bag body 105.

(Configuration of third string member)
The third string member 112 has a plurality of one ends 112A and one other end 112B disposed on the opposite side of the one end 112A. That is, one end 112A side of the third string member 112 is branched into a plurality of parts. The plurality of one ends 112A are each connected to one second lid member 107.

By pulling the other end 112B of the third string member 112, the plurality of second lid members 107 are peeled off from the second opening 105A. Then, by opening the plurality of second openings 105A, the plurality of dehydrating agents 103 are housed in the third storage bag 92 and dehydrate the swollen water absorbing agent 93.

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 110 of the sixth embodiment, it is possible to secure a sufficient force for the plurality of water absorbing agents 93 to press the inner circumferential surface 2a of the pipe 2, and the blockage by the closing unit main body 111 is prevented. When no longer needed, the closing unit main body 111 can be recovered from the pipe 2 through which the liquid 3 flows.
Furthermore, the cylindrical member closing unit 110 of the sixth embodiment can obtain the same effects as the cylindrical member closing unit 90 of the fifth embodiment.

The cylindrical member closing unit 110 configured as described above can be closed using a method similar to the method for closing the cylindrical member described in the second embodiment.

Note that a resistance generating member 31 shown in FIG. 5 may be provided so as to surround the outer peripheral surface of the first bag main body 68 constituting the cylindrical member closing unit 110.

<Seventh embodiment>
With reference to FIG. 17, a cylindrical member closing unit 120 according to a seventh embodiment will be described. In FIG. 17, the same components as those of the structure shown in FIG. 12 are given the same reference numerals.

(Overall configuration of cylindrical member closing unit)
The cylindrical member closing unit 120 is used to close a predetermined position A in the pipe 2 filled with the gas 119.
The cylindrical member closure unit 120 includes a closure unit main body 121 and a liquid supply pipe 122.

(Configuration of the blockage unit body)
The closure unit main body 121 excludes the first lid member 28 and the filter member 23 that constitute the closure unit main body 61 described in the third embodiment, and is composed of only the first opening 27A. It has the same structure as the closure unit main body 61 except for having the section 123.

The liquid supply pipe 122 has one end connected to the first opening 27A, and the other end connected to a liquid supply source (not shown) that supplies liquid (for example, water).

In the cylindrical member closing unit 120 configured as described above, as shown in FIG. By supplying the liquid, the water absorbing agent 65 is swollen and the predetermined position A of the pipe 2 is closed.

(Effect of cylindrical member closing unit)
According to the cylindrical member closing unit 120 of the seventh embodiment, by including the liquid supply pipe 122 configured as described above, even when no liquid is flowing in the pipe 2, the liquid can be supplied to the water absorbing agent 65. By swelling the water absorbing agent 65, the predetermined position A of the pipe 2 can be closed.

Note that the gas 119 only needs to fill the inside of the pipe 2, and does not need to be flowing within the pipe 2. Examples of the gas 119 include air and gas.

The cylindrical member closing method using the cylindrical member closing unit 120 configured as described above can be performed by a method similar to the flowchart shown in FIG. 4.

Note that the resistance generating member 31 shown in FIG. 5 may be provided so as to surround the outer circumferential surface of the first bag main body 68 constituting the cylindrical member closing unit 120.

Although the preferred embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to such specific embodiments, and various modifications may be made within the scope of the gist of the present disclosure described within the scope of the claims. It is possible to transform and change.

For example, the cylindrical member closing unit 120 described in the seventh embodiment is provided with the dehydrating agent 82, the second storage bag 84, and the third string member 45 shown in FIG. 13, and the gas 119 is filled. The closing unit main body may be recovered from inside the pipe 2.
<Additional notes>
The cylindrical member closing units 10, 30, 40, 60, 80, 90, 110, 120 and the cylindrical member closing method described in each embodiment are understood as follows, for example.

(1) The cylindrical member closing unit 10, 30, 40, 60, 80, 90, 110, 120 according to the first aspect has a cylindrical shape between the inner circumferential surface 2a of the cylindrical member 1 (piping 2). A water-absorbing agent 21 having an outer diameter R1 capable of forming a space; a first storage bag 22, 67 disposed within the cylindrical member 1 (piping 2) and accommodating the water-absorbing agent 21; The first storage bag 22, 67 stores the water absorbing agent 21, is waterproof, and has a waterproof property, and the cylindrical member 1 (piping 2), the first bag body 25, 68 has an outer diameter larger than the inner diameter R2 of a liquid introduction part 27, 123 used when supplying the liquid 3 to the water absorbing agent 21, 65, 93, and when the water absorbing agent 21, 65, 93 is swollen by the liquid 3, the water absorbing agent 21, 65, 93 The entire inner circumferential surface 2a of the cylindrical member 1 (piping 2) at a predetermined position A is pressed through the bag bodies 25, 68 of 1.

In this way, the first storage bag is arranged inside the cylindrical member 1 (piping 2), houses the water absorbing agents 21, 65, and 93, and has an outer diameter larger than the inner diameter R2 of the cylindrical member 1 (piping 2). 22, 67, the amount of water absorbing agent 21, 65, 93 required to block the cylindrical member 1 (piping 2) can be placed at the predetermined position A of the cylindrical member 1 (piping 2) at once. It becomes possible. Thereby, the water absorbing agents 21, 65, and 93 swollen by the liquid 3 can close the predetermined position A in the cylindrical member 1 (piping 2) in a short time.

(2) The cylindrical member closing unit 10, 30, 40, 60, 80, 90, 110 according to the second aspect is the cylindrical member closing unit 10, 30, 40, 60, 80, 90 of (1), 110, the liquid 3 is flowing inside the cylindrical member 1 (piping 2), one end is fixed to the closure unit main body 11, 41, 61, 81, 91, 111, and the other end is fixed to the closure unit main body 11, 41, 61, 81, 91, 111, It may further include a first string member 13 that is placed outside the cylindrical member 1 (piping 2) and that allows the first bag body 25, 68 to be placed at the predetermined position A.

By providing the first string member 13 having such a configuration, the closure unit main body 11, 41, 61, 81, 91, and 111 are placed inside the cylindrical member 1 (piping 2), and The closing unit main body 11, 41, 61, 81, 91, 111 can be arranged at a predetermined position A of.

(3) The cylindrical member closing unit 10, 30, 40, 60, 80, 90, 110 according to the third aspect is the cylindrical member closing unit 10, 30, 40, 60, 80, 90 of (2), 110, the liquid introducing portions 27, 123 are configured to include first openings 27A formed in the first bag bodies 25, 68, and the first openings 27A formed in the first bag bodies 25, 68, and a first lid 28 removably attached to the bag bodies 25, 68, one end 16A is fixed to the first lid 28, and the other end 16B is attached to the cylindrical member 1 ( It may further include a second string-like member 16 disposed outside the pipe 2).

By providing the first lid member 28 and the second string-like member 16 having such a configuration, the cylindrical member can be removed after the closure unit main body 11, 41, 61, 81, 91, 111 is placed at a predetermined position. 1 (piping 2), pull the second string member 16 from the outside of the first bag body 25, peel off the first lid 28 from the first bag body 25, and insert the cylindrical member 1 (piping 2) through the first opening 27A. The liquid 3 flowing through the pipe 2) can be supplied to the water-absorbing agent 21 to swell the water-absorbing agent 21 (that is, to block the predetermined position A).

(4) The cylindrical member closing unit 10, 30, 40, 60, 80, 90, 110 according to the fourth aspect is the cylindrical member closing unit 10, 30, 40, 60, 80, 90 of (3), 110, the closing unit main body 11, 41, 61, 81, 91, 111 is provided inside the first bag main body 25, 68 so as to face the first opening 27A, It may further include a filter member 23 through which the liquid 3 can flow and which suppresses outflow of the water absorbing agents 21, 65, and 93.

By providing the filter member 23 having such a configuration, when supplying the liquid 3 to the water absorbing agent 21, 65, 93, the first storage bag 22, 67 is supplied through the first opening 27A. It becomes possible to suppress the water absorbing agents 21, 65, 93 from flowing out to the outside. Thereby, after supplying the liquid 3 to the water absorbing agents 21, 65, 93, the water absorbing agents 21, 65, 93 necessary for blocking the cylindrical member 1 (piping 2) are secured in the first storage bags 22, 67. Therefore, the cylindrical member 1 (piping 2) can be closed with high accuracy.

(5) The cylindrical member closing unit 60, 80, 90, 110 according to the fifth aspect is the cylindrical member closing unit 60, 80, 90, 110 of (2) or (3), The main body 61 , 81 , 91 , 111 further includes a columnar member 63 having an outer peripheral surface 63 a on which the first storage bag 67 containing the water absorbing agent 65 , 93 is arranged. may be arranged so as to circumferentially surround the outer circumferential surface 63a of the columnar member 63, and may be fixed to the outer circumferential surface 63a of the columnar member 63.

By providing the columnar member 63 configured as described above and arranging the first storage bag 67 containing the water absorbing agents 65 and 93 so as to circumferentially surround the outer peripheral surface 63a of the columnar member 63, the water absorbing agent 65 , 93 can sufficiently press the inner circumferential surface 2a of the cylindrical member 1 (piping 2).

(6) The cylindrical member closing unit according to the sixth aspect is the cylindrical member closing unit 90, 110 of (5), in which the liquid introduction part 27 is formed in the first bag main body 68. The closing unit main body 91, 111 has a first opening 27A, and is housed in the first storage bag 67, and is divided into a plurality of parts and accommodates the water-absorbing agent 65 (a plurality of water-absorbing agents 93). The plurality of third storage bags 92 are arranged in the circumferential direction along the outer peripheral surface 63a of the columnar member 63 via the first storage bag 67. A third opening 92A is formed in a portion of the plurality of third storage bags 92 located on the first opening 27A side, and 27A and the plurality of third openings 92A, and includes a flow path member 95 that communicates the first opening 27A and the plurality of third openings 92A, When the agent 93 swells, it may press the inner peripheral surface 2a of the cylindrical member 1 (piping 2) via the first storage bag 67 and the third storage bag 92.

In this way, the plurality of third storage bags 92 that accommodate the water absorbing agent 93 divided into a plurality of parts and are arranged in the circumferential direction along the outer circumferential surface 63a of the columnar member 63, and the first opening 27A. By providing the channel member 95 that communicates with the third openings 92A formed in the plurality of third storage bags 92, the liquid 3 can be quickly supplied to the plurality of water absorbing agents 93. This makes it possible to swell a plurality of water absorbing agents 93 in a short time.

(7) The cylindrical member closing unit 10, 30, 40, 60, 80, 90, 110, 120 according to the seventh aspect is the cylindrical member according to any one of (2) to (6). The outer periphery of the first bag body 25, 68 of the closure unit 10, 30, 40, 60, 80, 90, 110, 120 that is pressed against the inner peripheral surface 2a of the cylindrical member 1 (piping 2) A resistance that is provided on the surface 25a and generates resistance between the inner circumferential surface 2a of the tubular member 1 (piping 2) when pressed against the inner circumferential surface 2a of the tubular member 1 (piping 2). A generating member 31 may further be provided.

By providing the resistance generating member 31 with such a configuration, the resistance generated between the inner circumferential surface 2a of the cylindrical member 1 (piping 2) and the resistance generating member 31 after the predetermined position A is closed is reduced. Therefore, movement of the closing unit main body 11, 41, 61, 81, 91, 111, 121 from the predetermined position A to the downstream side of the pipe 2 can be suppressed.

(8) The cylindrical member closing unit 40, 80, 110 according to the eighth aspect is the cylindrical member closing unit 40, 110 according to any one of (2) to (7), The closing unit main bodies 41, 81, 111 are arranged so that the dehydrating agent 42, 103 accommodated in the first bag main body 25, 68, the water absorbing agent 21, 65, 93, and the dehydrating agent 42 are separated. A second bag body 48, 86, 105 that accommodates the dehydrating agent 42, 82, 103 and has waterproof properties, a second opening 48A, 86A formed in the second bag body 48, 86, 105, 105A, and a second lid member 49 that is removably attached to the second bag body 48, 86, 105 so as to close the second openings 48A, 86A, 105A. The storage bags 43, 84, 101, and a third container having one end 45A fixed to the second lid member 49, 88, 107 and the other end 45B disposed outside the cylindrical member 1 (piping 2). It may further include a string-like member 45.

By providing the dehydrating agent 42, 82, 103, the second storage bag 43, 84, 101, and the third string member 45 configured as above, the cylindrical member 1 (piping 2) is prevented from being blocked. When it is no longer needed, the second lid member 49, 88, 107 is removed from the second bag body 48, 86, 105 by pulling the third string member 45, and the dehydrating agent 42, 82, 103 is removed. This makes it possible to dehydrate the water contained in the water-absorbing agents 21, 65, 93, thereby reducing the outer diameter of the water-absorbing agents 21, 65, 93.
This allows the closing unit main bodies 41, 81, 111 to move within the cylindrical member 1 (piping), so that from the inside of the cylindrical member 1 (piping 2) to the outside of the cylindrical member 1 (piping 2). In addition, the obstructing unit main bodies 41, 81, 111 that are no longer needed can be collected.

(9) The cylindrical member closing unit 120 according to the ninth aspect is the cylindrical member closing unit 120 of (1), in which the cylindrical member 1 (piping 2) is filled with gas 119. The liquid introduction part 123 is a first opening 27A formed in the first bag main body 68, and one end is connected to the first opening 27A, and the other end is connected to the first opening 27A. The closure unit main body 121 further includes a liquid supply pipe 122 connected to a liquid supply source that supplies the liquid to the water-absorbing agent 65 through a portion 27A, and the closing unit main body 121 is connected to the first housing containing the water-absorbing agent 65. It has a columnar member 63 including an outer circumferential surface 63a on which a bag 67 is arranged, and the first storage bag 67 is arranged so as to circumferentially surround the outer circumferential surface 63a of the columnar member 63, and It may be fixed to the outer peripheral surface 63a of the columnar member 63.

By providing the liquid supply pipe 122 having such a configuration, even when no liquid is flowing inside the cylindrical member 1 (piping 2), the liquid can be supplied to the water absorbing agent 65 to cause the water absorbing agent 65 to swell. Thus, the predetermined position A of the cylindrical member 1 (piping 2) can be closed.

(10) The cylindrical member closing unit 120 according to the tenth aspect is the cylindrical member closing unit 120 of (9), in which the cylindrical member 1 (piping 2) is It may further include a resistance generating member 31 that is provided at a portion pressed against the inner circumferential surface 2a of the cylindrical member 1 (piping 2) and generates resistance between it and the inner circumferential surface 2a of the cylindrical member 1 (piping 2).

By providing the resistance generating member 31 having such a configuration, it is possible to suppress movement of the closing unit main body 121 from the predetermined position A after the water absorbing agent 65 is swollen.

(11) The cylindrical member closing unit 120 according to the eleventh aspect is the cylindrical member closing unit 120 of (9) or (10), in which the closing unit main body 121 is connected to the first bag main body 68. The dehydrating agent 82 disposed inside, and the second waterproofing agent 82 that accommodates the dehydrating agent 82 so that the water absorbing agent 65 and the dehydrating agent 82 are separated, and has a second opening 86A. a second storage bag 84 including a bag body 86 and a second lid member 88 removably attached to the second bag body 86 so as to close the second opening 86A; further comprising a string-like member (third string-like member 45) having one end fixed to the second lid member 88 and the other end disposed outside the cylindrical member 1 (piping 2). You can.

By providing the dehydrating agent 82, the second storage bag 84, and the string-like member (third string-like member 45) configured in this way, it becomes unnecessary to block the cylindrical member 1 (piping 2). At this time, by pulling the string-like member (third string-like member 45), the second lid member 88 is removed from the second bag main body 86, and the moisture contained in the water-absorbing agent 65 is removed by the dehydrating agent 82. Therefore, it becomes possible to reduce the outer diameter of the swollen water absorbing agent 65.
This allows the closing unit body 121 to move within the cylindrical member 1 (piping 2), so that the closing unit body 121 can be recovered from within the cylindrical member 1 (piping 2).

(12) The cylindrical member closing unit 10, 30, 40, 60, 80, 90, 110, 120 according to the twelfth aspect is the cylindrical member according to any one of (1) to (11). In the closure unit 10, 30, 40, 60, 80, 90, 110, 120, the buoyancy of the closure unit body 11, 41, 61, 81, 91, 111, 121 may be ±1 kg or less. .

In this way, by setting the buoyancy of the closing unit main body 11, 41, 61, 81, 91, 111, 121 to ±1 kg or less, the frictional force generated between it and the inner circumferential surface 2a of the pipe 2 can be reduced. It is possible to make the closing unit body 11 smaller and smoothly guide the closing unit main body 11 to the predetermined position A.

(13) A cylindrical member closing method according to a thirteenth aspect is a cylindrical member closing method for closing a predetermined position A within the cylindrical member 1 (piping 2). By storing the water absorbing agents 21, 65, 93 in the first storage bag 22 having an outer diameter larger than the inner diameter R2 of the first storage bag 22, 67 and the water absorbing agents 21, 65, 93. A step of preparing a cylindrical member occluding unit 10, 30, 40, 60, 80, 90, 110, 120 having a occluding unit main body 11, 41, 61, 81, 91, 111, 121, and the step of preparing the cylindrical member 1 a step of arranging the closing unit body 11, 41, 61, 81, 91, 111, 121 at a predetermined position A in the (piping 2); 121 at the predetermined position A, supplying liquid 3 to the water absorbing agents 21, 65, and 93, and swelling the water absorbing agents 21, 65, and 93 with the liquid 3.

In this way, by arranging the closing unit main body 11, 41, 61, 81, 91, 111, 121 at the predetermined position A inside the cylindrical member 1 (piping 2), the inside of the cylindrical member 1 (piping 2) is It becomes possible to arrange at once the amount of water absorbing agent 21, 65, 93 necessary to block the cylindrical member 1 (piping 2) at the predetermined position A. Thereby, the predetermined position A in the cylindrical member 1 (piping 2) can be closed in a short time using the water absorbing agents 21, 65, and 93 swollen by the liquid 3.

(14) The cylindrical member closing method according to the fourteenth aspect is the cylindrical member closing method according to (13), in which the liquid 3 flows in the cylindrical member 1 (piping 2), One end 13A is fixed to the first storage bag 22, 67, the other end 13B is provided with a first string member 13 disposed outside the cylindrical member 1 (piping 2), and the closing unit In the step of arranging the main bodies 11, 41, 61, 81, 91, 111, the closing unit is placed at the predetermined position A from the upstream side of the cylindrical member 1 (piping 2) among the first string members 13. The first string member 13 corresponding to the length reached by the main body 11, 41, 61, 81, 91, 111 may be arranged within the cylindrical member 1 (piping 2).

In this way, the length of the first string member 13 is such that the closure unit main body 11, 41, 61, 81, 91, 111 reaches the predetermined position A from the upstream side of the cylindrical member 1 (piping 2). By arranging a part of the corresponding first string member 13 inside the cylindrical member 1 (piping 2), the closing unit main body 11, 41, 61, 81, 91, and 111 can be arranged.

(15) The cylindrical member closing method according to the fifteenth aspect is the cylindrical member closing method according to (13) or (14), wherein the first storage bag 22, 67, 93 is , 65, 93, is waterproof and has an outer diameter larger than the inner diameter R2 of the cylindrical member 1 (piping 2); a first lid member 28 removably attached to the first bag main body 25, 68 so as to close a first opening 27A formed in the water absorbing agent 21; , 65, 93, by pulling the second string member 16 whose one end 16A is fixed to the first lid member 28 from the outside of the cylindrical member 1 (piping 2), The first lid member 28 may be peeled off from the first bag body 25, 68.

In this way, after the closure unit main body 11, 41, 61, 81, 91, 111 is placed at the predetermined position A, the second string member 16 whose one end 16A is fixed to the first lid member 28 is connected to the pipe. By pulling the first cover member 28 from the outside of the bag body 25, 68, the liquid 3 flowing inside the pipe 2 is used to remove the water absorbing agent 21, 65, 93 at a predetermined position A. can be swollen.

(16) The cylindrical member closing method according to the 16th aspect is the cylindrical member closing method according to (14) or (15), in which the step of preparing the closing unit main body 41, 81, 111 includes The second opening 48A, 86A, 105A is formed to house the dehydrating agent 42, 82, 93 so that the agent 21, 65, 93 and the dehydrating agent 42, 82, 103 are separated. A second lid member detachably attached to the second bag body 48, 86, 105 so as to close the bag body 48, 86, 105 and the second opening 48A, 86A, 105A. By storing the second storage bag 43, 84, 101 containing 49 in the first storage bag 22, 67, the second bag body 48, 86, 105 and the dehydrating agent 42, 82, 103 After preparing the cylindrical member closing unit 40, 80, 110 including the closing unit main body 41, 81, 111 and pressing with the water absorbing agent 21, 65, 93, one end 45A is attached to the second lid. The second lid member 49 is peeled off from the second bag body 48 by pulling the third string member 45 fixed to the materials 49, 88, 107 from the outside of the cylindrical member 1 (piping 2). a step of dehydrating water contained in the swollen water absorbing agents 21, 65, 93 with the dehydrating agents 42, 82, 93 through the second openings 48A, 86A, 105A; , 82 and 93, the first string member 13, one end of which is fixed to the first storage bag 22, 67, is pulled from the outside of the cylindrical member 1 (piping 2) to remove the water from the closure unit main body. The method may further include a step of recovering 41, 81, and 111.

The cylindrical member 1 (piping 2 ) and the water-absorbing agents 21, 65, 93 surrounded by the first storage bag 22, the unnecessary waste is removed from inside the cylindrical member 1 (piping 2) through which the liquid 3 flows. The occlusion unit main body 41, 81, 111 that has become obsolete can be recovered.

(17) The cylindrical member closing method according to the seventeenth aspect is the cylindrical member closing method according to (13), in which the cylindrical member 1 (piping 2) is filled with gas 119, In the step of supplying the liquid to the water absorbing agent 65, the liquid is supplied to the water absorbing agent 65 through a liquid supply pipe 122 whose one end is connected to the first opening 27A formed in the first storage bag 67. may be supplied.

In this way, when the cylindrical member 1 (piping 2) is filled with the gas 119, the liquid supply pipe 122 connected to the first opening 27A is used to fill the inside of the first storage bag 67. The water absorbing agent 65 can be swollen by supplying liquid to the water absorbing agent 65 housed in the .

1... Cylindrical member 2... Piping 2a... Inner peripheral surface 3... Liquid 10, 30, 40, 60, 80, 90, 110, 120... Cylindrical member closing unit 11, 41, 61, 81, 91, 111, 121 ...Closure unit main body 13...First string member 13A, 16A, 45A, 112A...One end 13B, 16B, 45B, 112B...Other end 16...Second string member 21, 65, 93...Water absorbing agent 22, 67 ...First storage bag 23...Filter member 25, 68...First bag body 25a...Outer peripheral surface 25A, 25B, 63A, 68A...End 27, 123...Liquid introduction part 27A...First opening 28...First Lid material 31...Resistance generating member 42,82,103...Dehydrating agent 43,84,101...Second storage bag 45,112...Third string member 48,86,105...Second bag main body 48A, 86A, 105A... Second opening 49, 88, 107... Second lid member 63... Column member 63a... Outer peripheral surface 92... Third storage bag 95... Channel member 97... Ring-shaped channel portion 97A... Ring Flow path 98...First cylindrical flow path portion 98A, 99A...Flow path 99...Second cylindrical flow path portion 119...Gas 122...Liquid supply pipe A...Predetermined position B...Direction D...Radial direction L... Length direction R1...outer diameter R2...inner diameter

Claims (13)

a water absorbent having an outer diameter that allows a cylindrical space to be formed between the water absorbing agent and the inner peripheral surface of the cylindrical member;
a first storage bag disposed within the cylindrical member and accommodating the water absorbing agent;
comprising an occlusion unit body containing
The first storage bag accommodates the water-absorbing agent, is waterproof, and is provided with a first bag main body having an outer diameter larger than an inner diameter of the cylindrical member, and the first bag main body, a liquid introduction part used when supplying liquid to the water absorbing agent housed in the first bag main body,
The water absorbing agent, when swollen by the liquid, presses the entire inner peripheral surface of the cylindrical member at a predetermined position via the first bag main body,
The liquid is flowing within the cylindrical member,
A cylindrical member closure unit further comprising a first string member having one end fixed to the closure unit main body and the other end disposed outside the cylindrical member to arrange the first bag main body at the predetermined position. . The liquid introduction part includes a first opening formed in the first bag main body, and a first opening removably attached to the first bag main body so as to close the first opening. 1 lid material;
The cylindrical member closing unit according to claim 1 , further comprising a second string member having one end fixed to the first lid member and the other end disposed outside the cylindrical member. The closing unit main body further includes a filter member provided inside the first bag main body so as to face the first opening, through which the liquid can flow, and which suppresses outflow of the water absorbing agent. The cylindrical member closing unit according to claim 2 . The closure unit main body further includes a columnar member having an outer circumferential surface on which the first storage bag containing the water absorbing agent is disposed,
The cylindrical member closing unit according to claim 1 or 2 , wherein the first storage bag is arranged so as to circumferentially surround the outer circumferential surface of the columnar member and is fixed to the outer circumferential surface of the columnar member. The liquid introduction part has a first opening formed in the first bag body,
The closure unit main body has a plurality of third storage bags that are accommodated in the first storage bag and that separately accommodate the water absorbing agent,
The plurality of third storage bags are arranged in the circumferential direction along the outer peripheral surface of the columnar member via the first storage bag,
A third opening is formed in a portion of the plurality of third storage bags located on the first opening side, and
a flow path member provided between the first opening and the plurality of third openings, and making the first opening and the plurality of third openings communicate;
The cylindrical member closing unit according to claim 4 , wherein the plurality of water absorbing agents press the inner peripheral surface of the cylindrical member via the first storage bag and the third storage bag when swollen. The first bag body is provided on the outer circumferential surface of the first bag body that is pressed against the inner circumferential surface of the cylindrical member, and when pressed against the inner circumferential surface of the cylindrical member, the inner circumferential surface of the cylindrical member The cylindrical member closing unit according to any one of claims 1 to 5 , further comprising a resistance generating member that generates resistance between them. The closure unit main body includes a dehydrating agent housed in the first bag main body;
a second bag main body that houses the dehydrating agent and has waterproof properties so that the water absorbing agent and the dehydrating agent are separated; a second opening formed in the second bag main body; a second storage bag including a second lid removably affixed to the second bag main body so as to close the opening of the bag;
a third string member having one end fixed to the second lid member and the other end disposed outside the cylindrical member;
The cylindrical member closing unit according to any one of claims 1 to 6 , further comprising: a water absorbent having an outer diameter that allows a cylindrical space to be formed between the water absorbing agent and the inner peripheral surface of the cylindrical member;
a first storage bag disposed within the cylindrical member and accommodating the water absorbing agent;
comprising an occlusion unit body containing
The first storage bag accommodates the water-absorbing agent, is waterproof, and is provided with a first bag main body having an outer diameter larger than an inner diameter of the cylindrical member, and the first bag main body, a liquid introduction part used when supplying liquid to the water absorbing agent housed in the first bag main body,
The water absorbing agent, when swollen by the liquid, presses the entire inner peripheral surface of the cylindrical member at a predetermined position via the first bag main body,
The cylindrical member is filled with gas,
The liquid introduction part is a first opening formed in the first bag main body,
further comprising a liquid supply pipe, one end of which is connected to the first opening, and the other end of which is connected to a liquid supply source that supplies the liquid to the water-absorbing agent through the first opening;
The closure unit main body has a columnar member including an outer peripheral surface on which the first storage bag containing the water absorbing agent is arranged,
The first storage bag is arranged so as to circumferentially surround the outer circumferential surface of the columnar member, and is fixed to the outer circumferential surface of the columnar member,
The closure unit main body includes a dehydrating agent disposed inside the first bag main body;
A second bag main body that houses the dehydrating agent so that the water absorbing agent and the dehydrating agent are separated and has a waterproof property and has a second opening formed therein, and a second bag body that is configured to close the second opening. a second storage bag including a second lid removably attached to the second bag body;
has
The cylindrical member closing unit further includes a string-like member having one end fixed to the second lid member and the other end disposed outside the cylindrical member . The first storage bag further includes a resistance generating member that is provided in a portion pressed against the inner peripheral surface of the cylindrical member and generates resistance between the first storage bag and the inner peripheral surface of the cylindrical member. 8. The cylindrical member closing unit according to 8 . The cylindrical member closure unit according to any one of claims 1 to 9 , wherein the buoyancy of the closure unit main body is ±1 kg or less. A cylindrical member closing method for closing a predetermined position within a cylindrical member, the method comprising:
A cylindrical member closure unit that includes a closure unit main body that includes the first accommodation bag and the water absorption agent by accommodating the water absorption agent in the first accommodation bag having an outer diameter larger than the inner diameter of the cylindrical member. a process of preparing;
arranging the closure unit main body at a predetermined position within the cylindrical member;
After arranging the closing unit main body at the predetermined position, a liquid is supplied to the water absorbing agent, and the water absorbing agent is swollen by the liquid , thereby pressing the predetermined position within the cylindrical member with the water absorbing agent. process and
Equipped with
The liquid is flowing within the cylindrical member,
a first string member having one end fixed to the first storage bag and the other end disposed outside the cylindrical member;
In the step of arranging the closing unit main body, the first string-like member, which corresponds to the length of the closing unit main body reaching the predetermined position from the upstream side of the cylindrical member, is A method for closing a cylindrical member, comprising placing a member within the cylindrical member . A cylindrical member closing method for closing a predetermined position within a cylindrical member, the method comprising:
A cylindrical member closure unit that includes a closure unit main body that includes the first accommodation bag and the water absorption agent by accommodating the water absorption agent in the first accommodation bag having an outer diameter larger than the inner diameter of the cylindrical member. a process of preparing;
arranging the closure unit main body at a predetermined position within the cylindrical member;
After arranging the closing unit main body at the predetermined position, a liquid is supplied to the water absorbing agent, and the water absorbing agent is swollen by the liquid , thereby pressing the predetermined position within the cylindrical member with the water absorbing agent. process and
Equipped with
The first storage bag accommodates the water-absorbing agent, is waterproof, and is formed in a first bag main body having an outer diameter larger than an inner diameter of the cylindrical member, and the first bag main body. the first opening
a first lid member removably attached to the first bag body so as to close the bag body;
In the step of supplying liquid to the water-absorbing agent, a second string-like member, one end of which is fixed to the first lid member, is pulled from the outside of the cylindrical member to remove the liquid from the first bag body. A method of closing a cylindrical member by peeling off the lid material . In the step of preparing the closing unit main body, a second bag main body containing the dehydrating agent so that the water absorbing agent and the dehydrating agent are separated and having a second opening formed therein; By storing a second storage bag including a second lid removably attached to the second bag main body so as to close the opening in the first storage bag, preparing a cylindrical member closing unit comprising a second bag body and the closing unit body containing the dehydrating agent;
After the step of pressing with the water absorbing agent, a third string member having one end fixed to the second lid member is pulled from the outside of the cylindrical member to remove the second lid from the second bag body. a step of peeling off the material and dehydrating the moisture contained in the swollen water absorbing agent with the dehydrating agent through the second opening;
After dehydration using the dehydrating agent, pulling a first string-like member whose one end is fixed to the first storage bag from the outside of the cylindrical member to collect the closing unit main body;
The cylindrical member closing method according to claim 11 or 12 , further comprising:

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