JP2018003590A - Water stop plug device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water stop plug device with a new structure stopping a water flow by blocking or closing a clean water channel or a sewer water channel.SOLUTION: A water stop plug device comprises: a body which is arranged opposite to one of side walls of an open conduit and has a rectangular panel with both right and left edges thereof bent toward the one of the side walls along vertical lines; and a body fixing device which fixes the body to the one of the side walls. The body fixing device serves as an expansion device which uses both edges thereof to connect the other of the side walls of the open conduit. The body is fixed to the one of the side walls by being pressed against the one of the side walls when the expansion device is extended.SELECTED DRAWING: Figure 5

Description

  The present invention is a waterway repair work, a waterway changeover / change of a waterway, or a seismic reinforcement work for a waterway without stopping the water flow in an open channel or underdrained waterway that always flows with clean water or sewage. The present invention relates to a water stop plug device used in the above.

  Various types of waterway restoration work, waterway switching / flow path change work, or waterway seismic reinforcement work, such as when waterways or sewage waterways are damaged due to an earthquake, disaster or accident, or when restoration is necessary due to aging Waterway construction is carried out. In waterway construction, water supply or sewage can only be shut off for a very short period of time, and the waterway construction due to water outage is only an emergency measure. There is.

  Conventionally, a water channel opening / closing device (plug device) for performing water channel construction without stopping water flow in the water channel and a construction method using the same have been proposed.

  Patent documents 1 and 2 install a waterway opening and closing device which consists of a panel which has a shape corresponding to the shape of a waterway section on the upstream side and the downstream side of a construction area, and maintain flowing water by the connecting pipe which a waterway opening and closing device body has. Thus, a method and apparatus for drought of a construction area is disclosed.

  Patent Document 3 is a conduit that connects between the pipe opening and closing devices installed on the upstream side and the downstream side of the construction area of the water supply or sewage pipeline, and connects and integrates a plurality of cylindrical pipes, A sewage pipe construction method and apparatus using a conduit deformable into a curved shape is disclosed.

  Patent Document 4 discloses an inner conduit type pressurizing operation for adjusting water stopping and running water in a conduit connecting between the pipe opening and closing devices installed on the upstream side and the downstream side of the construction area of the water supply or sewage pipeline. An open / close heavy pressure resistant lid device is disclosed.

JP 09-014567 A JP 2009-074337 A JP 2009-019757 A JP 2007-002644 A

  In the construction method described above, a water channel opening and closing device is installed on each of the upstream side and the downstream side of a construction site where water is drought, and a conduit is connected between them to lead the running water into the conduit, thereby dripping the water channel.

  The present inventor is a construction method different from the method of continuing the flowing water by the conduit between the water channel opening and closing devices, and by introducing the flowing water to another water channel branched from the existing water channel, the existing water channel is maintained. We have developed a construction method and a new structure water-stop plug device for shutting off or closing a specific section or a specific location to stop the section and water it. In addition, a water stop plug device having a novel structure was also developed for a water stop plug device used for a method of continuing flowing water through a conduit between water channel opening and closing devices.

  Accordingly, an object of the present invention is to provide a water stop plug device having a novel structure that blocks or closes a water channel to stop the inflow of water.

  The water stop plug device of the present invention has a circular panel body concentrically disposed inside a pipe having a circular cross section, and is disposed over the entire outer periphery of the panel body, and can expand or contract by injecting or discharging fluid. A ring-shaped bag body and a ring-shaped flange panel that protrudes from the both sides of the panel body in the outer circumferential direction, and the ring-shaped bag body is fixed so as not to be displaced with respect to the inner surface of the flange panel. The outer diameter is expanded by injection of fluid and is pressed against the inner surface of the pipe to block the pipe.

  Preferably, in the water blocking plug device, the ring-shaped bag body is fixed to the flange panel by a metal fitting. The outer peripheral edge of the flange panel is provided with a ring-shaped rubber that contacts the inner surface of the pipe over the entire circumference, and the ring-shaped rubber is pressed against the flange panel, so that the inner surface of the pipe and the flange A gap with the outer peripheral edge of the panel is closed to close the conduit. Furthermore, an inclined surface against which the ring-shaped rubber is pressed is provided on the outer peripheral edge of the flange panel. In addition, a ring pressing flange that supports the ring-shaped rubber is attached to the outer peripheral edge of the flange panel by a bolt, and the ring-shaped rubber is pressed against the inclined surface of the flange panel by tightening the bolt.

  ADVANTAGE OF THE INVENTION According to this invention, the water stop plug apparatus which interrupts | blocks or closes a water channel in various water channel constructions, such as a water channel repair construction, a water channel switching, a flow path change construction, or a water channel earthquake-proof reinforcement construction, is provided. It can be installed in a state where a water flow is flowing in the water channel, and it can be installed safely and hygienically without the worker being immersed in water, and a reliable water stop is realized.

It is a figure which shows the construction procedure of the construction which dries a water channel and switches a flow path. It is a figure which shows the construction procedure of the construction which dries a water channel and switches a flow path. It is a figure which shows the construction procedure of the construction which dries a water channel and switches a flow path. It is a figure which shows the construction procedure of the construction which dries a water channel and switches a flow path. The structure of the panel main body 21 of the baffle type water stop plug apparatus 20 is shown. It is a figure which shows the installation form of the baffle type water stop plug apparatus. It is a figure which shows the structure of the panel main body 31 of the box-type water stop plug apparatus. It is a figure which shows the structure of the jig | tool couple | bonded with the panel main body 31 of the box-type water stop plug apparatus 30. FIG. It is a figure which shows the installation form of the box-type water stop plug apparatus. It is a figure which shows the pressurization of the vertically lower direction of the panel main body 31. FIG. It is a figure which shows the construction procedure of another construction which dries a water channel and switches a flow path. It is a figure which shows the construction procedure of another construction which dries a water channel and switches a flow path. It is a figure which shows another installation form of the baffle type water stop plug apparatus. It is a figure which shows the structural example of the water stop plug apparatus in the example of 2nd Embodiment. 3 is a partial cross-sectional view of a water stop plug device 50 including the periphery of a ring-shaped bag body 52. FIG.

  Embodiments of the present invention will be described below with reference to the drawings. However, such an embodiment does not limit the technical scope of the present invention.

  In the first embodiment of the present invention, a water stop plug device employed in construction for switching a flow path by drought of a water channel will be described.

  FIG. 1 to FIG. 4 are diagrams showing a construction procedure for construction in which a water channel is drought and a flow path is switched. For example, the construction of a water flow that flows through two open channel water channels (one water channel 11 on one side and the other water channel 12 on the other side) in parallel within a sewage treatment plant is established without stopping the water flow. As a procedure for switching to a new water channel, the temporary water channel 13, the first water channel 11 and the second water channel 12 for bypassing the first water channel 11 are first connected in FIG. A temporary waterway 14 is installed. As shown in the figure, a gate 15 is provided between the 1st channel 11 and the 2nd channel 12 so that the water flow from the 2nd channel 12 can flow into the 1st channel 12. Open state.

  Thereafter, in FIG. 1A, baffle type water stop plug devices 20 are installed at two locations on the side wall of the first system water channel 11 connected to the temporary water channel 13, and the side wall portion stopped by the baffle type water stop plug device 20 is removed. The baffle type water stop plug device 20 is removed after removal. Thereby, as shown in FIG.1 (c), the temporary waterway 13 becomes a detour of the 1st system waterway 11. As shown in FIG. The configuration of the baffle type water stop plug device 20 will be described later. Subsequently, as shown in FIG. 1 (c), baffle type water stop plug devices 20 are similarly installed on the side wall portion of the 1-system water channel 11 and the side wall portion of the 2-system water channel 12 that are connected to the temporary water channel 14. The side wall portion stopped by the mold water stop plug device 20 is removed, and the baffle type water stop plug device 20 is removed after the removal. Thereby, as shown to Fig.2 (a), the temporary waterway 14 turns into a bypass channel which connects the 1st system waterway 11 and the 2nd system waterway 12. FIG.

  Subsequently, as shown in FIG. 2 (b), a box-type water stop plug device 30 that shuts off the water channel at each of the upstream position and the downstream position of the section A of the first system water channel 11 that can be stopped by the provision of the temporary water channel 13. Install. After installing the box-type water stop plug device 30, the section A can be drought by draining the remaining water in the section A with a pump or the like. The configuration of the box-type water stop plug device 30 will be described later.

  Further, as shown in FIG. 2 (c), for the second system water channel 12, a box type that blocks the water channel at each of the upstream position and the downstream position of the section B of the second system water channel 12 that can be stopped by the provision of the temporary water channel 13. A water stop plug device 30 is installed. After the box-type water stop plug device 30 is installed, the remaining water in the section B is drained by a pump or the like, and the section B is drought.

  In FIG. 3 (a), the water channel partial area (shaded part) of section A and section B is removed, and in FIG. 3 (b), a foundation 40 of a new structure is installed in the removed area. In FIG. 3C, a new structure 41 such as a pump building is installed. In the new structure 41, water flows from the 1st waterway 11 and the 2nd waterway flow, a new waterway 42 is formed on the downstream side, and the flow path is switched from the 1st waterway 11 and the 2nd waterway to the new waterway 42.

  After completion of the new structure 41, the box-type water stop plug device 30 on the upstream side of the section A and the section B is removed as shown in FIG. Thereby, as shown in FIG.4 (b), the water flow from the 1st system waterway 11 and the 2nd system waterway flows into the new structure 41, and the switching to the new waterway 42 is performed. The downstream box-type water stop plug device 30 is also removed. Moreover, since the detour by the temporary waterway 13 becomes unnecessary, the baffle type water stop plug apparatus 20 is installed again in the upstream connection part of the temporary waterway 13, and the side wall of the 1st waterway 11 is restored, FIG.4 (c) As shown in Fig. 2, after the side wall is restored, the baffle type water stop plug device 20 is removed.

  The configurations and installation forms of the baffle type water stop plug device 20 and the box type water stop plug device 30 employed in the construction of the above enforcement procedure will be described below.

  FIG. 5 shows the configuration of the panel body 21 of the baffle type water stop plug device 20, FIG. 5 (a) is a front view, and FIG. 5 (b) is a plan view. The panel body 21 is a steel rectangular panel, and reinforcing ribs are applied in a lattice shape. The panel body 21 has a shape in which both left and right ends are bent to one side with the vertical direction as an axis. The angle of the bend and the width of the bend are appropriately designed according to the shape and size of the water channel to be installed, as shown, the angle is a right angle or an obtuse angle, and the width is set on the side wall of the water channel In such a case, it is only necessary to maintain an interval that does not hinder the side wall removal work. In addition, by making the bending angle an obtuse angle, the resistance of the water flow received by the end of the panel main body 21 facing the water flow is reduced as compared with the case of a right angle, and the water pressure load caused by the water flow on the panel main body 21 and the guide rail 23 is reduced. Can be made. The greater the obtuse angle (the smaller the degree of bending), the weaker the water flow resistance received by the end of the panel body 21, and the obtuse angle is preferably 135 degrees or more. A water stop rubber 22 is attached to a necessary region including a surface in contact with the water channel side wall of the panel body 21 and a surface in contact with the water channel bottom.

  FIGS. 6A and 6B are diagrams showing an installation form of the baffle type water stop plug device 20, FIG. 6A being a plan view and FIG. 6B being a side view. A guide rail (guide jig) 23 is attached to the side wall to which the panel body 21 is attached in accordance with the dimensions of the panel body 21 at the installation position. The panel body 21 is lifted by a crane, for example, and attached to the side wall along the guide rail 23. The water stop rubber 22 on the lower surface of the panel main body 21 contacts the bottom of the water channel, and the water stop rubbers 22 on the left and right end surfaces of the panel main body 21 contact the side walls of the water channel.

  The panel main body 21 attached to the side wall is pressed and fixed to the side wall by an extendable hydraulic cylinder 24 which is a main body fixing device. The hydraulic cylinder 24 can be remotely operated by driving a hydraulic pump connected to the hydraulic cylinder 24. Both ends of the hydraulic cylinder 24 are connected to the rear surface of the panel main body 21 and the side wall on the opposite side of the water channel. It is installed so as to be passed between the opposite side wall. By extending the hydraulic cylinder 24 by, for example, motor driving (or manual) of a hydraulic pump, the left and right ends of the panel body 21 are pressed against the side wall of the water channel, and the panel body 21 is fixed to the side wall. Crimped against the side wall to stop water. Two hydraulic cylinders 24 that pressurize in the horizontal direction with respect to the side wall are attached at least two each on the left and right. The main body fixing device is not limited to a hydraulic cylinder, and may be another type of device that can extend and contract, such as a hydraulic jack.

  Furthermore, in order to pressurize the panel main body 21 in the vertical direction, a cradle 25 is passed between both side walls of the upper opening portion of the water channel. The cradle 25 is made of steel and is fixed to the side wall of the water channel on both sides. Then, the hydraulic cylinder 24 is installed so that both ends thereof are connected to the cradle 25 and the upper end surface of the panel main body 21, and the hydraulic cylinder 24 is extended by, for example, driving a motor of a hydraulic pump, thereby lowering the lower surface of the panel main body 21. Is pressed against the bottom of the water channel and the bottom of the water channel is stopped. At least two hydraulic cylinders 24 that pressurize in the vertical direction against the bottom of the water channel are attached to the left and right. The vertical pressurization by the installation of the cradle 25 is shown in FIG. In FIG. 6B, illustration of the side wall and the guide rail 23 is omitted.

  FIG. 7 shows the configuration of the panel body 31 of the box-type water stop plug device 30, FIG. 7 (a) is a front view, and FIG. 7 (b) is a plan view. The panel main body 31 is a steel rectangular panel that approximates the cross-sectional shape of the water channel. The dimensions of the panel body 31 are appropriately designed according to the shape and size of the water channel to be installed. A water stop rubber 32 is attached to a necessary region including a surface in contact with the bottom of the water channel of the panel body 31 and a surface in contact with a jig described later. The panel body 31 is water-stopped by being coupled to the jig and attached to the water channel. The panel body 31 is provided with fixing brackets 33 protruding from the surface of the panel body 31, and a plurality of fixing brackets 33 are provided on both sides of the panel body 31. As will be described later, a hydraulic cylinder 39 that is an expansion / contraction device as a main body fixing device is fixed to the plurality of fixing brackets 33 and fixed so that the expansion / contraction direction of the hydraulic cylinder 39 is perpendicular to the surface of the panel main body 31. Arranged on the metal fitting 33. FIG. 7B is a plan view showing the fixture 33 with a hydraulic cylinder.

  FIG. 8 shows a configuration of a jig coupled to the panel body 31 of the box-type water stop plug device 30, FIG. 8 (a) is a front view, and FIG. 8 (b) is a cross-sectional view of a columnar member constituting the jig. It is. The jig 34 has a pair of columnar members 35 attached to the side walls of the water channel so as to extend along the vertical direction. The columnar member 35 has a cross section having a surface facing the side wall of the water channel and a surface facing the panel body 31. It is formed in an L shape. FIG. 8B shows a cross-sectional view of the columnar member 35.

  Each of the columnar members 35 is installed in a vertical direction in contact with the side wall of the water channel, and a water stop rubber 36 is applied to a surface that faces and contacts the side wall. The waterstop rubber 36 is also applied to the lower end surface of the columnar member 35 that contacts the bottom of the water channel. The lower ends of the columnar members 35 are connected to each other by a hydraulic cylinder 37 which is an expansion / contraction device as a jig fixing device. That is, both ends of the hydraulic cylinder 37 are connected to the columnar member 35, and by extending the hydraulic cylinder 37, the columnar member 35 is pressure-fixed to the side wall, and the side wall and the columnar member 35 are watertight. . A structure in which the columnar member 35 and the hydraulic cylinder 37 are connected is assembled before installation, and the assembled state is arranged in the water channel, so that an operator does not need to connect the hydraulic cylinder in the water. Safety and efficiency are greatly improved. The main body fixing device and the jig fixing device are not limited to hydraulic cylinders, and may be devices of another form that can be expanded and contracted, such as a hydraulic jack.

  FIG. 9 is a diagram showing an installation form of the box-type water stop plug device 30. FIG. 9A is a plan view showing the arrangement of the fixing bracket 33a with the hydraulic cylinder and the jig 34, and FIG. FIG. 5 is a diagram showing a crimping and fixing operation by expansion and contraction of a hydraulic cylinder 39. A guide rail (guide jig) 38 is attached to the installation position of the side wall to which the jig 34 is attached in accordance with the dimension of the jig 34. The jig 34 is lifted by a crane, for example, and attached to the side wall along the guide rail 38. The water stop rubber 36 on the lower end surface of the jig 34 contacts the bottom of the water channel, and the water stop rubber 36 on the surface facing the side wall contacts the side wall of the water channel.

  After the jig 34 is installed at a predetermined position, a hydraulic cylinder 37 that connects the lower ends of the columnar members 35 is extended by motor driving, and the columnar members 35 are pressed against the side walls and fixed. In addition to the lower end of the columnar member 35, the hydraulic cylinder is arranged and extended so as to pass the hydraulic cylinder 37 between the columnar members 35 even at an upper position, for example, near the middle position of the columnar member 35. , Press at least two places.

  After fixing the jig 34 to the water channel in a watertight manner, the panel body 31 is fixed to the jig 34 in a watertight manner. Fixing brackets 33 are attached to a plurality of locations on the surface 31 a of the panel body 31 facing the columnar member 35, and the fixing bracket 33 is mounted so that a gap is formed between the surface 31 a of the panel body 31 and the fixing bracket 33. Then, the panel body 31 is suspended from the panel body 31 lifted by the crane so that the jig 34 is sandwiched in the gap between the panel body 31 and the fixing bracket 33, and the panel body 31 is attached to the jig 34.

  A hydraulic cylinder 39, which is a telescopic device, is attached to the fixing bracket 33a. The hydraulic cylinder 39 is connected to a hydraulic pump, and a gap S (see FIG. 9) between the surface 31a of the panel body 31 and the fixing bracket 33. (B)) is extended. More specifically, as shown in FIG. 9 (b), the hydraulic cylinder 39 abuts on the opposite surface of the surface facing the panel body 31 of the columnar member 35 and extends, thereby filling the gap S, The panel body 31 is pressed against the surface of the columnar member 35 facing the panel body 31. That is, by driving the hydraulic pump to drive the hydraulic cylinder 39, the panel body 31 is attracted to the columnar member 35 by being pressurized in a direction in which the gap between the panel body 31 and the fixture 33 is widened. The water blocking rubber 32 of the panel main body 31 is pressed against the columnar member 35, and the panel main body 31 is fixed to the columnar member 35 in a watertight manner. The fixing bracket 33 with a hydraulic cylinder is disposed at least two places (a total of four places) in the vertical direction on the left and right sides of the panel body 31 in the portion facing the columnar member 35. 7 and 10 show an example in which the fixing bracket 33 is arranged at three places on the left and right, a total of six places.

  Furthermore, in order to pressurize the panel main body 31 in the vertical direction, a cradle is passed between both side walls of the upper opening portion of the water channel. Then, both ends of the hydraulic cylinder are connected to the pedestal and the upper end surface of the panel main body 31, and the lower surface of the panel main body 31 is pressed against the bottom of the water channel by extending the hydraulic cylinder, for example, by driving a motor. Stop water.

  FIG. 10 is a diagram illustrating the vertical pressurization of the panel body 31. A pedestal 40 straddling both sides of the water channel is fixed to the water channel directly above the panel main body 31 fixed to the jig 34, and the hydraulic cylinder 44 has both sides of the cradle 40 and the upper end surface of the panel main body 31. By connecting and extending, the panel main body 31 is pressurized vertically downward. The pedestal 40 formed in a U-shape is made of steel, and at least two hydraulic cylinders 44 that pressurize vertically against the bottom of the water channel are attached to the left and right.

  Next, another installation form of the baffle type water stop plug device 20 described above will be described. FIG.11 and FIG.12 is a figure which shows the construction procedure of another construction which drips a waterway and switches a flow path. The other construction is a construction for newly connecting a branch line to the water channel without stopping the water flow flowing through a culvert type water channel (pipe) such as a water pipe or a sewer pipe buried underground. The mold water stop plug device 20 is installed on a side wall portion to which the branch path is connected, and blocks the inflow of the water flow to the connection location to cause drought.

  The construction procedure is as follows. First, in FIG. 11 (a), the area between the water channel 70 and the new structure 71 (the hatched portion in FIG. 11 (a)) is excavated, and the connection point on the water channel 70 side and the new structure 71 side are excavated. Expose the connection point. In FIG.11 (b), the upper part (hatching part of FIG.11 (b)) of the connection location of the water channel 70 is removed, and upper opening is formed. In FIG.11 (c), the baffle type water stop plug apparatus 20 is installed in a connection location. This installation mode will be described later.

  In FIG. 12A, the residual water between the baffle type water stop plug device 20 and the side wall (connection location) of the water channel 70 is pumped out, and then in FIG. 12B, the baffle type water stop plug device 20 is drawn. The side wall portion of the water channel 70 surrounded by is removed, and a branch pipe 72 is installed in FIG. Although not shown in the figure, after the branch pipe 72 is installed, a caulking process is performed on the connecting portions on both ends of the branch pipe 72, and the baffle type water stop plug device 20 is removed. Further, the upper portion of the water channel 70 removed in FIG. 11B is restored and closed, and the entire excavated area is backfilled.

  FIG. 13 is a view showing another installation form of the baffle type water stop plug device 20. FIG. 13A is a plan view, and FIG. 13B is a cross-sectional view. The configuration of the main body panel 21 of the baffle type water stop plug device 20 employed in the other construction described above is the same as the configuration of FIG. 5. The panel is a rectangular panel that is bent in the direction of the side wall. The difference between the installation mode shown in FIG. 13 and the installation mode shown in FIG. 6 is the installation mode of the hydraulic cylinder which is the main body fixing device. Specifically, a jig 73 is fixedly attached to each of the left and right ends of the main body panel 21, and the jig 73 includes an extension portion 73 a extending from the main body panel 21 to the back surface of the side wall across the side wall. Is done.

  A plurality of hydraulic cylinders 74, which are expansion and contraction devices, are arranged in series in the vertical direction on each of the extension portions 73a of the jigs 73 on the left and right sides. The hydraulic cylinders 74 are connected to the extension portions 73a of the jig 73 and the back surfaces of the side walls. It is attached to the extension part 73a in a form that expands and contracts between them. The extension of the hydraulic cylinder 74 increases the distance between the extended portion 73a and the back surface of the side wall, so that the main body panel 21 is attracted to the side wall. As a result, the left and right ends of the main body panel 21 are pressed against the side wall. 21 is fixed to the side wall.

  Also in the construction procedure of the other construction described above, a guide rail (guide jig) 23 is attached in advance to the side wall to which the panel main body 21 is attached in accordance with the dimensions of the panel main body 21 at the installation position. The main body 21 is lifted by a crane, for example, and attached to the side wall along the guide rail 23 from the upper opening 70a. The water stop rubber 22 on the lower surface of the panel main body 21 contacts the bottom of the pipe line, and the water stop rubber 22 on the left and right end faces of the panel main body 21 contacts the side wall of the water channel.

  Further, in order to pressurize the panel main body 21 in the vertical direction, a cradle having both ends fixed across the panel main body 21 is provided in a manner similar to the above-described example so as to connect between the cradle and the panel main body 21. The hydraulic cylinder 74 is installed, and the hydraulic cylinder 74 is extended by, for example, a motor drive, whereby the lower surface of the panel body 21 is pressed against the bottom of the water channel and the bottom of the water channel is stopped.

  Next, a description will be given of a second embodiment of a water stop plug device employed in construction for drought of a water channel. In the second embodiment, the water stop plug device is used for a culvert type water channel (pipe) such as a water pipe or a sewer pipe buried underground, and the pipe is repaired, exchanged or switched. It is arrange | positioned at the both ends of the pipe line of the area which performs, and the inflow of the water flow to the pipe line area is interrupted | blocked, and the pipe line area is drought.

  FIG. 14 is a view showing a configuration example of a water stop plug device in the second embodiment, FIG. 14 (a) is a side view, and FIG. 14 (b) is a water stop plug device main body in which a caster portion is omitted. FIG. The water stop plug device 50 according to the second embodiment includes a circular panel body 51 disposed concentrically inside a pipe having a circular cross section, and is disposed over the entire outer periphery of the panel body 51 to inject fluid. Alternatively, the ring-shaped bag body 52 includes a rubber ring-shaped bag body (balloon) 52 that can be expanded or contracted by discharging, and a ring-shaped flange panel 53 that protrudes from the both sides of the panel body 51 in the outer circumferential direction. Is fixed and arranged so as not to be displaced with respect to the inner surface of the flange panel 53. The outer diameter of the flange panel 53 is increased by injection of fluid and is pressed against the inner surface of the pipe to close the pipe. The flange panel 53 is radially provided with reinforcing ribs 53a extending in the radial direction. Water guide holes 54 are provided in the center of the panel body 51, and the water guide holes 54 of the water stop plug device 50 installed at both ends of the construction target section are connected by a temporary conduit via a conduit connection flange 59. A water stream flows through the conduit. A technique for connecting construction target sections with a temporary conduit is described in Japanese Patent Publication No. 5066658. In addition, a lid (not shown) that opens and closes the water guide hole 54 is attached. A configuration example of the lid is described in Japanese Patent No. 4081512. The caster 55 is a moving means for moving the water stop plug device 50 introduced from the ground to the underground pipeline to the construction target section along the pipeline.

  FIG. 15 is a partial cross-sectional view of the water stop plug device 50 including the periphery of the ring-shaped bag body 52, and is a detailed cross-sectional view of a dotted line encircled portion A in FIG. The ring-shaped bag body 52 is made of rubber having a predetermined strength, and can be prevented from being deformed by excessive hydraulic pressure or air pressure, preferably by using a so-called woven fabric-reinforced material for reinforcement. After the water stop plug device 50 is installed at a predetermined position, a fluid such as air is press-fitted into the ring-shaped bag body 52 and inflated, so that the ring-shaped bag body 52 comes into close contact with the inner wall of the pipe and is stopped. .

  A metal fitting 56, for example, a bolt, is fixedly attached to the surface of the ring-shaped bag body 52 that contacts the flange panel 53. As shown in FIG. 15B, the metal fittings 56 are attached at a plurality of positions at equal intervals over the entire circumference. The position of the flange panel 53 corresponding to the mounting position of the metal fitting 56 is formed with a hole 57 through which the metal fitting 56 passes. By fitting the metal fitting 56 into the hole 57 and tightening with the nut 58, the ring-shaped bag body 52 is The flange panel 53 is fixed and attached so as not to be misaligned. When a fluid such as air is press-fitted into the ring-shaped bag body 52 and expanded, the ring-shaped bag body 52 expands without being kinked and contacts the flange panel 53 evenly. Water leakage due to insufficient adhesion due to uniform expansion can be prevented. In particular, when the water stop plug device 50 is applied to the water stop of a large-diameter pipe having a diameter exceeding 4000 mm, the ring-shaped bag body 52 having a relatively long peripheral length is not twisted evenly. Expansion can be secured.

  Further, a ring-shaped rubber 60 is provided on the outer peripheral edge of the flange panel 53 so as to be in contact with the inner wall surface of the pipe over the entire circumference. A ring retainer flange 61 that supports the ring rubber 60 is attached to the outer peripheral edge of the flange panel 53 by a bolt 62. The ring rubber 60 abuts the ring retainer flange 61, and the ring retainer flange 61 is flanged by the bolt 62. The ring-shaped rubber 60 is pressed against the flange panel 53 by being tightened and pushed into the 53 side. An inclined member 64 having an inclined surface against which the ring-shaped rubber 60 is pressed is provided at the outer peripheral edge of the flange panel 53, and the ring-shaped rubber 60 is pressed against the inclined surface 64 of the flange panel 53 by tightening the bolts 62. By pressing the ring-shaped rubber 60, the cross-section of the ring-shaped rubber 60 is deformed and pressed in close contact with the inner wall surface of the pipeline, and the gap between the inner wall surface of the pipeline and the outer peripheral edge of the flange panel 53 is closed. And the pipeline is blocked. That is, the ring-shaped rubber 60 also stops the pipe line, and a double water-stop structure is formed by both the ring-shaped bag body 52 and the ring-shaped rubber 60, thereby realizing reliable water stop of the pipe line. .

  The present invention is not limited to the above-described embodiment, and there are design changes within a range that does not depart from the gist including various modifications and corrections that can be conceived by those who have ordinary knowledge in the field of the present invention. Of course, it is included in the present invention.

  11: 1 system water channel, 12: 2 system water channel, 13: Temporary water channel, 14: Temporary water channel, 15: Gate, 20: Baffle type water stop plug device, 21: Panel body, 22: Water stop rubber, 23: Guide rail (Guide jig), 24: hydraulic cylinder, 25: cradle, 30: box-type water stop plug device, 31: panel body, 32: water stop rubber, 33: fixing bracket, 34: jig, 35: columnar member 36: water stop rubber, 37: hydraulic cylinder, 38: guide rail (guide jig), 39: hydraulic cylinder, 40: cradle, 44: hydraulic cylinder, 50: water stop plug device, 51: panel main body, 52 : Ring-shaped bag body, 53: flange panel, 54: water guide hole, 56: metal fitting, 57: hole, 58: nut, 59: conduit connection flange, 60: ring-shaped rubber, 61: ring pressing flange, 62: bolt, 64: Diagonal member, 70: waterways, 71: new structures, 72: branch pipe 73: jig, 74: hydraulic cylinder

Claims (5)

A circular panel body concentrically arranged inside a pipe having a circular cross section;
A ring-shaped bag body that is arranged over the entire circumference on the outer peripheral surface of the panel body and that can be expanded or contracted by injecting or discharging fluid; and
A ring-shaped flange panel protruding in the outer circumferential direction from both sides of the panel main body,
The ring-shaped bag body is fixed and arranged so as not to be displaced with respect to the inner surface of the flange panel. The outer diameter of the ring-shaped bag body is expanded by injection of fluid and is pressed against the inner surface of the pipe line to block the pipe line. A water-stop plug device characterized by being characterized.   The water stop plug device according to claim 1, wherein the ring-shaped bag body is fixed to the flange panel by a metal fitting. A ring-shaped rubber that is in contact with the inner surface of the pipe line is provided over the entire circumference on the outer peripheral edge of the flange panel,
The ring-shaped rubber is pressed against the flange panel, whereby a gap between an inner surface of the pipe line and an outer peripheral edge of the flange panel is closed to close the pipe line. Or the water stop plug apparatus of 2.   The water stop plug device according to claim 3, wherein an inclined surface against which the ring-shaped rubber is pressed is provided on an outer peripheral edge portion of the flange panel. A ring pressing flange that supports the ring-shaped rubber is attached to an outer peripheral edge portion of the flange panel by a bolt, and the ring-shaped rubber is pressed against the inclined surface of the flange panel by tightening the bolt. The water stop plug device according to claim 4.

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