Water flow suppression device and method for installing the water flow suppression device

Abstract

Reduces the effort required to install the water flow suppression device. [Solution] The water flow suppression device is installed in the space between the conduit and the cable inserted into the conduit, and suppresses the force of the water flow that flows out through this space. The water flow suppression device has a tube shape with both ends closed and includes a balloon that surrounds the outer circumference of the cable in the circumferential direction of the conduit. The water flow suppression device includes adhesive bodies attached to both ends of the balloon that, when surrounded, abut against each other and adhere to one another. The water flow suppression device includes a fluid inlet for injecting fluid into the balloon. When fluid is injected into the space, the balloon expands from a first state in which it is deformable while maintaining its surrounding state, to a second state in which it fits with the inner circumferential surface of the conduit and tightens and holds the cable.

Description

【Technical Field】 【0001】 The present disclosure relates to a water flow suppression device and a method for installing the water flow suppression device. 【Background Art】 【0002】 Conventionally, as a structure for laying various cables underground, a configuration is known in which a hollow pipe is connected between a plurality of maintenance holes (for example, manholes and handholes), and a cable is passed through this pipe. Here, groundwater may penetrate into the underground pipe through gaps in connection parts connecting individual pipes and the like. The water that has penetrated into the pipe flows out from, for example, the pipe opening into the maintenance hole. Although the maintenance hole may be provided with a drainage configuration, if water flows in at a rate exceeding its drainage capacity, water will accumulate in the maintenance hole. 【0003】 In the above configuration, when performing new installation work or maintenance work on underground cables, the water accumulated in the maintenance hole hinders the work. Therefore, it is necessary to perform a drainage operation to drain this water before the work. In order to reduce the labor of this drainage operation, there has been a need for a water flow suppression device that suppresses or completely stops the momentum of the water flow flowing out from the pipe opening in underground pipes. 【0004】 In meeting the above needs, a complete water stop device that completely stops the water flow flowing out from the pipe opening is not necessarily necessary or appropriate. The reason why a complete water stop device is not necessary is that if the momentum of the water flowing out from the pipe opening is weaker than the drainage capacity of the maintenance hole, the prior drainage operation becomes unnecessary even without completely stopping this water. Also, the reason why a complete water stop device is not appropriate is that a complete water stop device that completely stops the water flow needs to be firmly fixed to the pipe opening to withstand the water pressure of the groundwater, and the work of fixing and removing it is laborious. 【0005】 Regarding a water flow suppression device that meets the above needs and does not completely stop the water flow out of the pipe outlet, for example, the water-stopping structure technology disclosed in Patent Document 1 below is known. This water-stopping structure has a configuration in which upper and lower cylindrical halves, each having a recess corresponding to the size of the cable, are joined together. The lower cylindrical halves are equipped with a water guide hole, and the water in the pipe is drained through this water guide hole. When a water-stopping pin is inserted into this water guide hole, the water-stopping structure blocks the water. [Prior art documents] [Patent Documents] 【0006】 [Patent Document 1] Patent No. 3022072 [Overview of the Initiative] [Problems that the invention aims to solve] 【0007】 In the prior art described in Patent Document 1, the cylindrical half-body must be sized to match the size of the conduit, and similarly, the recess must be sized to match the size of the cable. Therefore, in the prior art, when installing the water-stopping structure on the conduit, it was necessary to perform additional work to investigate the size of the conduit and cable in advance. 【0008】 This disclosure relates to a water flow suppression device that reduces or completely stops the force of water flowing out of a pipe outlet, and makes it possible to reduce the effort required during installation. [Means for solving the problem] 【0009】 According to one aspect of this disclosure, a water flow suppression device is provided that is installed in the space between a conduit and a cable inserted into the conduit to reduce or completely stop the force of the water flow flowing out through this space. The water flow suppression device comprises a balloon that is shaped like a tube with both ends closed and is in a constricting state that surrounds the outer circumference of the cable in the circumferential direction of the conduit. The water flow suppression device also comprises adhesive bodies attached to both ends of the balloon that, when in the constricting state, abut each other at a surface and adhere to one another. The water flow suppression device also comprises a fluid inlet for injecting fluid into the balloon. The balloon is capable of expanding from a first state in which it is deformable while maintaining its constricting state, to a second state in which it fits with the inner circumferential surface of the conduit and tightens and holds the cable, upon injection of fluid into the space. 【0010】 According to the above aspects, the water flow suppression device expands from a first state to a second state in the space between the conduit and the cable, allowing for installation of the water flow suppression device on the conduit and securing of the cable regardless of the size of the conduit and cable. Therefore, according to the above aspects, the additional work of investigating the size of the conduit and cable in advance is unnecessary when installing the water flow suppression device on the conduit, thereby reducing the effort required during installation. 【0011】 Furthermore, according to the above aspects, by attaching both ends of the balloon, which is wrapped around the cable, with an adhesive, the risk of the balloon becoming unwrapped can be reduced. Therefore, according to the above aspects, when installing the water flow suppression device on the pipeline, the possibility of needing additional work to re-wrap a balloon that has become unwrapped can be reduced, thereby reducing the amount of work required during the installation process. 【0012】 In other aspects, the balloon, in the second state, presses and sandwiches each adhesive from both sides in the circumferential direction. 【0013】 According to the above aspects, in the second state, the force of the water flow that may leak from between the abutting surfaces of each adhesive can be suppressed by the balloon pressing down on each adhesive. 【0014】 According to another aspect, each adhesive body is composed of a plastic, putty-like sealant. 【0015】 According to the above aspect, in the second state, each adhesive body pressed between the balloons undergoes plastic deformation, increasing the adhesion between their abutting surfaces. Therefore, according to the above aspect, the force of the water flow that may leak from between the abutting surfaces of each adhesive body in the second state can be further suppressed. 【0016】 In other aspects, a method for installing a water flow suppressor is provided, which involves placing the aforementioned water flow suppressor in the space between the conduit and the cable and installing it in the conduit. This method for installing a water flow suppressor includes the step of injecting fluid from a fluid inlet into the balloon, which is in the surrounding state and first state and placed in the space, thereby inflating the balloon from the first state to the second state. 【0017】 According to the above aspects, by expanding the water flow suppression device from the first state to the second state in the space between the conduit and the cable, the water flow suppression device can be attached to the conduit and the cable can be held in place regardless of the size of the conduit and cable. Therefore, according to the above aspects, when installing the water flow suppression device on a conduit, the additional work of investigating the size of the conduit and cable in advance is unnecessary, thereby reducing the effort required for the installation work. [Effects of the Invention] 【0018】 According to this disclosure, a water flow suppression device that reduces or completely stops the force of the water flow out of a pipe outlet can reduce the effort required during installation. [Brief explanation of the drawing] 【0019】 [Figure 1]It is a perspective view showing the mounting state of the water flow suppression device 10 according to an embodiment. [Figure 2] It is a front view showing the water flow suppression device 10 of FIG. 1. [Figure 3] It is a sectional view taken along line III-III of FIG. 2 as seen in the arrow direction. [Figure 4] It is a plan view showing the state of the water flow suppression device 10 of FIG. 1 before mounting. [Figure 5] It is a left side view showing the state of the water flow suppression device 10 of FIG. 1 before mounting, and the release paper 12A of FIG. 4 is represented by a phantom line. [Figure 6] It is a bottom view showing the state of the water flow suppression device 10 of FIG. 1 before mounting. [Figure 7] It is a sectional view taken along line VII-VII of FIG. 4 as seen in the arrow direction. [Figure 8] It is a sectional view taken along line VIII-VIII of FIG. 4 as seen in the arrow direction. [Figure 9] It is an explanatory diagram for explaining the mounting method of the water flow suppression device according to an embodiment. [Figure 10] It is an explanatory diagram for explaining the mounting method of the water flow suppression device according to an embodiment. 【Mode for Carrying Out the Invention】 【0020】 Hereinafter, the configuration of the water flow suppression device 10 (see FIG. 1) according to an embodiment of the present disclosure will be described. In the following description, each of the "front side", "rear side", "front surface side", and "back surface side" of the water flow suppression device 10 is defined such that the side where the fluid inlet 13 protrudes from the water flow suppression device 10 is the "front side", and the side facing the cable 92 is also the "back side" (see FIG. 3). 【0021】 As shown in Figures 1 to 3, the water flow suppression device 10 is applied to a conduit 91 through which three cables 92 (see Figure 2) are inserted. In this embodiment, the conduit 91 is a buried straight pipe, and one end of it, the conduit opening 91B, is open to a maintenance hole 90. The three cables 92 are each single-core power cables, and a portion of each cable 92 extends into the maintenance hole 90 through the conduit opening 91B. These cables 92 are twisted together (not shown) in sets of three to be used as a so-called "CVT cable". A seal body 93 with a shape corresponding to the gap 92A is inserted into the gap 92A between these three cables 92. This seal body 93 is made of a sealing material (for example, modified butyl rubber) that combines water absorption and swelling properties, self-adhesiveness, and plasticity. 【0022】 The water flow suppression device 10 is inserted into the space 91C between the inner circumferential surface 91A of the conduit 91 and the three cables 92, through the conduit opening 91B from the side of the maintenance hole 90. The water flow suppression device 10 installed in space 91C blocks the water 90B in the conduit 91, thereby reducing the force of the water flow 90A that flows out through space 91C and the conduit opening 91B into the maintenance hole 90 (see Figure 3). In cases where the amount of water 90B in the conduit 91 is relatively small, the water flow suppression device 10 may completely stop the water flow 90A flowing out into the maintenance hole 90 (not shown). 【0023】 As shown in Figure 2, the water flow suppression device 10 comprises a balloon 11, an adhesive body 12, and a fluid inlet 13. 【0024】 As shown in Figures 4 to 8, the balloon 11 is a long, tube-shaped bag in which a front sheet 11A, which constitutes the front surface of the balloon 11, and a back sheet 11B, which constitutes the back surface, are bonded together at their edges 11D and 11E (see Figure 5) on both sides in the width direction. 【0025】 The balloon 11 of this embodiment is an aluminum laminate bag in which the front sheet 11A and the back sheet 11B are each made of a long aluminum laminate film. Furthermore, a double-sided adhesive tape 10A (see Figure 4) with release paper 10C is attached to the center of the front surface of the front sheet 11A along its longitudinal direction. Similarly, a double-sided adhesive tape 10B (see Figure 6) with release paper 10D is attached to the center of the back surface of the back sheet 11B along its longitudinal direction. These double-sided adhesive tapes 10A and 10B are made from a putty-like sealing material (e.g., modified butyl rubber) that possesses water absorption and swelling properties, self-adhesiveness, and plasticity, molded into a long strip. The thickness of the double-sided adhesive tapes 10A and 10B is greater than the thickness of the front sheet 11A and the back sheet 11B, as shown in Figure 7. 【0026】 As shown in Figures 4 and 6, recesses 11C are formed at both ends in the longitudinal direction of the balloon 11. These recesses 11C are constructed as "gussets" by joining the folded-over front sheet 11A and the folded-over back sheet 11B at their folded edges, as shown in Figures 5 and 8. Furthermore, an adhesive body 12 made of a plastic putty-like sealing material is attached to the recesses 11C by filling them. With these configurations, both ends in the longitudinal direction of the balloon 11 are closed. 【0027】 In this embodiment, each recess 11C is formed into a cylindrical shape by the front sheet 11A and the back sheet 11B, which are folded back at the recesses 11C, being bonded together at the front and rear edges 11D and 11E. The putty-like sealing material that constitutes the adhesive body 12 is the same type of material used for the putty-like sealing material used for the double-sided adhesive tapes 10A and 10B. Therefore, each adhesive body 12 has self-adhesive properties, adhering to each other when butted together. In the water flow suppression device 10 before installation, release paper 12A is placed over the adhesive body 12 filled in each recess 11C to prevent the adhesive body 12 from adhering to other items. 【0028】 As shown in Figures 9 and 10, the balloon 11 can be positioned to encircle the outer circumference of the three cables 92 in the circumferential direction of the conduit 91. In this encircling state, the adhesive bodies 12 attached to both ends of the balloon 11 abut each other at their surfaces and adhere to each other due to their self-adhesive properties. The adhesion between the adhesive bodies 12 prevents the encircling balloon 11 from falling off the three cables 92. This configuration makes it easy to insert the balloon 11 into the space 91C between the conduit 91 and the three cables 92 while maintaining the encircling state. 【0029】 As shown in Figures 4 and 6, the fluid inlet 13 is attached to the front edge 11D of the balloon 11, protruding from the middle portion in the longitudinal direction. As shown in Figure 10, the connector 20A of the fluid injection device 20 is connected to this fluid inlet 13, and it is used to inject fluid 20B into the balloon 11 via this connector 20A. 【0030】 In this embodiment, the fluid injection device 20 uses silicone water (a liquid obtained by dispersing silicone oil in water using an emulsifier) ​​as the fluid 20B and injects this fluid 20B at an appropriately set injection pressure. The fluid inlet 13 is also equipped with a backflow suppression mechanism (not shown) to suppress the backflow of fluid 20B from inside the balloon 11. 【0031】 Before the fluid 20B is injected, the balloon 11 has a deformable strip shape and expands as the fluid 20B is injected. This expansion allows the balloon 11 to fill the space 91C between the inner circumferential surface 91A of the conduit 91 and the three cables 92 (see Figures 2 and 3). 【0032】 In other words, as shown in Figure 9, the balloon 11 can be made deformable while maintaining the surrounding state by surrounding the three cables 92 and bringing the adhesive bodies 12 together before the fluid 20B is injected. The balloon 11 in the first state can be placed in the space 91C between the inner surface 91A of the conduit 91 and the three cables 92 while maintaining this first state. The balloon 11 in the first state placed in the space 91C then inflates to a second state (see dashed line in Figure 10) by the injection of the fluid 20B, which fits with the inner surface 91A of the conduit 91 and tightens and holds the three cables 92. 【0033】 As shown in Figure 2, the pressure of the fluid 20B that inflates the balloon 11 also acts on the recesses 11C at both ends of the balloon 11, attempting to spread out the folds of the front sheet 11A and back sheet 11B that make up these recesses 11C. Due to this action, the adhesive material 12 filled in each recess 11C is subjected to a force that pushes it out of the recess 11C. 【0034】 Here, when the balloon 11 is in the second state, the recesses 11C at both ends face each other, and similarly, each adhesive body 12 abuts against each other. Therefore, in the second state, the balloon 11 presses against each adhesive body 12 from both sides in the circumferential direction of the conduit 91. At this time, the putty-like sealing material constituting each adhesive body 12 is crushed and plastically deformed by the external force of the pressing from the balloon 11 (see Figure 3). 【0035】 Next, we will explain how to install the water flow suppression device 10 described above by placing it in the space 91C between the pipe 91 and the three cables 92 inserted into the pipe 91 (hereinafter simply referred to as "the method"). 【0036】 In this method, the worker (not shown in the diagram) first prepares the water flow suppression device 10 and prepares it for installation (not shown in the diagram). In this process, the worker peels off the release papers 10C, 10D, and 12A from the prepared water flow suppression device 10. Furthermore, the worker wets the surfaces of the front sheet 11A and the back sheet 11B with silicone water. This is done to temporarily weaken the adhesiveness of the double-sided adhesive tapes 10A and 10B from which the release papers 10C and 10D have been peeled off, thereby preventing these double-sided adhesive tapes 10A and 10B from sticking to undesired locations. 【0037】 Next, as shown in Figure 9, the worker bends the balloon 11 of the water flow suppression device 10 to enclose the outer circumference of the three cables 92 in the circumferential direction of the conduit 91. This work is performed inside the maintenance hole 90 with the rear edge 11E of the balloon 11 facing the conduit opening 91B of the conduit 91. When enclosing the balloon 11, the worker also temporarily fastens it by butting the adhesive bodies 12 at both ends together to make them adhere to each other. Note that the work of enclosing the balloon 11 is performed before injecting the fluid 20B into the balloon 11. As a result, the balloon 11 is in a first state in which it is deformable while maintaining the enclosing state. 【0038】 The worker then inserts the entire water flow suppressor 10 into the pipeline 91 while maintaining the first state of its balloon 11. Since three cables 92 are already inserted into the pipeline 91, the water flow suppressor 10 is placed in the space 91C (see Figure 10) between the pipeline 91 and the three cables 92. Also, since the water flow suppressor 10 is inserted into the pipeline 91 from the rear side (the side of the edge 11E), when the entire water flow suppressor 10 is placed in space 91C (see Figure 10), the fluid inlet 13 is exposed from the pipeline opening 91B towards the maintenance hole 90. 【0039】 Next, as shown in Figure 10, the worker connects the connector 20A of the fluid injection device 20 to the fluid inlet 13 of the water flow suppression device 10 placed in space 91C, and injects the fluid 20B into the balloon 11 via this connector 20A. At this time, the balloon 11 inflates due to the fluid 20B injected from the fluid inlet 13, and enters a second state (see dashed line in Figure 10) in which it fits with the inner circumferential surface 91A of the conduit 91 and tightens and holds the three cables 92. Therefore, the above operation can be rephrased as "the step of inflating the balloon 11 from the first state to the second state by injecting the fluid 20B from the fluid inlet 13 into the balloon 11, which is placed in space 91C and is in a surrounding state and the first state." 【0040】 When performing the above steps, it is preferable that the worker lifts the three cables 92 with a jack (not shown) or the like to separate the three cables 92 from the inner surface 91A of the conduit 91, at least in the area where the water flow suppression device 10 is to be installed. 【0041】 Once the above steps are completed, the water flow suppressor 10 is mounted on the conduit 91 and holds the three cables 92. In this mounted state, as shown in Figure 3, the double-sided adhesive tape 10A on the front surface of the water flow suppressor 10 contacts the inner surface 91A of the conduit 91, and the double-sided adhesive tape 10B on the back surface contacts the three cables 92. In addition, each adhesive body 12 of the water flow suppressor 10 is pressed against each other and plastically deformed by the external force of compression from the balloon 11. 【0042】 Here, the double-sided adhesive tapes 10A and 10B, and each adhesive body 12 are each made of a self-adhesive putty-like material. Therefore, when the water flow suppression device 10 is attached for a long period of time, each of the above components is integrally joined to the object it comes into contact with (not shown). That is, the double-sided adhesive tape 10A adheres to the inner circumferential surface 91A of the conduit 91 and is integrally joined to it. The double-sided adhesive tape 10B adheres to the three cables 92 and is integrally joined to them. In addition, two adhesive bodies 12 that are butted against each other become one integrated part. 【0043】 The water flow suppression device 10 described above expands from a first state to a second state in the space 91C between the conduit 91 and the cable 92, allowing the water flow suppression device 10 to be attached to the conduit 91 and the cable 92 to be held in place, regardless of the size of the conduit 91 and the cable 92. Therefore, the water flow suppression device 10 eliminates the need for additional work to investigate the size of the conduit 91 and the cable 92 in advance when installing the water flow suppression device 10 to the conduit 91, thereby reducing the effort required during the installation process. 【0044】 Furthermore, the water flow suppression device 10 reduces the risk of the balloon 11 being released from its wrapped state around the cable 92 by using the adhesive body 12 to adhere both ends of the balloon 11 to the cable 92. Therefore, the water flow suppression device 10 reduces the possibility of needing additional work to re-wrap the balloon 11 if it has been released from its wrapped state when installing the water flow suppression device 10 on the pipeline 91, thereby reducing the amount of work required during the installation process. 【0045】 Furthermore, the water flow suppression device 10 can suppress the force of the water flow 90A that may leak from between the abutting surfaces of each adhesive body 12 in the second state by compressing each adhesive body 12 with the balloon 11. 【0046】 Furthermore, with the water flow suppression device 10, the two adhesive bodies 12 that are brought together during the installation of the water flow suppression device 10 become one integrated part due to the self-adhesive properties of the adhesive bodies 12 when the installed state of the water flow suppression device 10 is maintained for a long period of time. Therefore, with the water flow suppression device 10, the force of the water flow 90A that could leak from between the abutting surfaces of each adhesive body 12 can be made smaller or completely eliminated, further suppressing the force of the water flow 90A that could leak from between these abutting surfaces. 【0047】 Furthermore, according to the method described above, by expanding the water flow suppression device 10 from the first state to the second state in the space 91C between the conduit 91 and the cable 92, the water flow suppression device 10 can be attached to the conduit 91 and the cable 92 can be held in place, regardless of the size of the conduit 91 and the cable 92. Therefore, according to this method, when attaching the water flow suppression device 10 to the conduit 91, the additional work of investigating the size of the conduit 91 and the cable 92 in advance is unnecessary, thereby reducing the effort required during the attachment work. 【0048】 Furthermore, according to this method, when inflating the balloon 11 from the first state to the second state by injecting fluid 20B into the balloon 11 from the fluid inlet 13, the three cables 92 are separated from the inner surface 91A of the conduit 91 in the area where the water flow suppression device 10 is to be installed. Therefore, according to this method, the risk of a part of the balloon 11 being pressed and blocked between the inner surface 91A of the conduit 91 and the cables 92, and the injected fluid 20B not being able to spread throughout the balloon 11, can be reduced. 【0049】 The embodiments for implementing this disclosure have been described above by the embodiment described above. However, it will be clear to those skilled in the art that various substitutions, modifications, and changes are possible without departing from the purpose of this disclosure. That is, embodiments for implementing this disclosure may include all substitutions, modifications, and changes that do not depart from the spirit and purpose of the claims attached to this specification. For example, the following various embodiments can be implemented as embodiments for implementing this disclosure. 【0050】 (1) In the embodiment described above, the water flow suppression device is placed in the space between a buried straight pipe buried underground and three power cables used as so-called "CVT cables," and surrounds these three power cables. A seal is pre-inserted into the gap between these three power cables. However, the water flow suppression device of the present disclosure can be placed in a conduit of appropriate choice, such as a bridge-attached conduit attached to a road bridge or an indoor conduit installed inside a building. Furthermore, the form of the conduit in which the water flow suppression device is placed can be changed as appropriate, such as a branch pipe or a flexible pipe. Also, the cable surrounding the water flow suppression device may be a different type of cable from power cables, such as a communication cable. Furthermore, the form of the cable surrounding the water flow suppression device can be changed as appropriate, such as a single-core cable used alone or a cable in which multiple cables are bundled together with tape or a sheath. In these cases, a spacer that is attached to the cable separately from the water flow suppression device may be used in conjunction with the water flow suppression device. Here, the specific configuration of the spacer may be appropriately changed depending on the shape of the cable. Alternatively, the water flow suppression device may be used independently without being used as a set with the spacer. 【0051】 (2) In the embodiment described above, silicone water, in which silicone oil is dispersed in water using an emulsifier, is injected as a fluid into the balloon of the water flow suppression device. However, in the water flow suppression device of the present disclosure, a fluid (liquid or gas) of appropriate choice, such as water, silicone oil itself, or carbon dioxide, may be injected into the balloon. 【0052】 (3) In the embodiment described above, the balloon of the water flow suppression device compresses each adhesive material by the action of the folded-over recesses at both ends in the longitudinal direction of the balloon, which are attached to the adhesive material, tending to expand. However, in the water flow suppression device of the present disclosure, a configuration may be adopted in which the balloon itself is expanded in the longitudinal direction by the pressure of the fluid to compress each adhesive material. Alternatively, the water flow suppression device may not have a configuration that compresses each adhesive material. In these cases, the balloon of the water flow suppression device is not limited to having the "gusset" configuration described above, and its configuration can be changed as appropriate. 【0053】 (4) In the embodiment described above, the balloon of the water flow suppression device is an aluminum laminate bag made of aluminum laminate film. However, the balloon of the water flow suppression device of the present disclosure may be a bag made of a material other than aluminum, such as polyethylene terephthalate or nylon. [Explanation of Symbols] 【0054】 10 Water flow suppression device 10A Double-Sided Adhesive Tape 10B Double-Sided Adhesive Tape 10C Release paper 10D release paper 11 Balloons 11A Front sheet 11B Backside Sheet 11C recess 11D Edge 11E Edge 12 Adhesives 12A Release paper 13 Fluid inlet 20 Fluid injection device 20A connector 20B Fluid 90 Maintenance Hole 90A water flow 90B water 91 Pipeline 91A Inner surface 91B Pipe port 91C Space 92 Cables 92A Gap 93 seals

Claims

[Claim 1] A water flow suppression device provided in the space between a conduit and a cable inserted into the conduit, which reduces or completely stops the force of the water flow flowing out through the space, A balloon having a tube shape with both ends closed and surrounding the outer circumference of the cable in the circumferential direction of the conduit, Adhesive bodies attached to both ends of the balloon, which, in the surrounding state, abut against each other at their surfaces and adhere to each other, The balloon includes a fluid inlet for injecting fluid, Equipped with, The balloon is capable of expanding from a first state in which it is deformable while maintaining its surrounding shape, to a second state in which it fits with the inner circumferential surface of the conduit and tightens and holds the cable, by the injection of the fluid into the space. Water flow suppression device. [Claim 2] A water flow suppression device according to claim 1, In the second state, the balloon presses and sandwiches each adhesive body from both sides in the circumferential direction. Water flow suppression device. [Claim 3] A water flow suppression device according to claim 2, Each of the aforementioned adhesive bodies is composed of a plastic putty-like sealing material. Water flow suppression device. [Claim 4] A method for installing a water flow suppression device, wherein the water flow suppression device described in any one of claims 1 to 3 is installed in the conduit by placing it in the space between the conduit and the cable, The process includes the step of injecting the fluid into the balloon, which is placed in the space and is in the surrounding state and first state, from the fluid inlet to inflate the balloon from the first state to the second state. How to install a water flow suppression device.

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