JP5019903B2 - Continuous water control body installation device - Google Patents

Description

  The present invention surrounds a part of an existing fluid pipe with a casing, cuts off the excised portion of the existing fluid pipe in the casing in an indefinite water state, and installs at least the water control body formed from the partition wall Then, the present invention relates to a continuous water control body installation device for an existing fluid pipe that blocks or forms a flow path by the water control body.

  A conventional continuous water control body installation device excavates the original ground and installs a gate chamber in a part of the pipeline, forms an inlet on the upstream side of the pipeline of the gate chamber, and flows downstream of the pipeline. An outlet is formed, and a water control body is installed by cutting off a part of the pipeline in the gate chamber (see, for example, Patent Document 1).

  Further, as another conventional continuous water control body installation device, a part of the pipeline is surrounded by a casing, and a part of the pipeline is excised by a pipe cutting device disposed inside the casing. (For example, refer to Patent Document 2).

Japanese Patent No. 3606048 (2nd page, FIG. 1) Japanese Patent No. 3306721 (2nd page, Fig. 1)

  However, in Patent Document 1, in the installation process of the water control body, the fluid in the pipe flows out into the gate chamber as part of the pipe is cut, and the operator opens and closes the gate chamber filled with the fluid. It is necessary to perform door installation work and the like, and such underwater work is not only dangerous, but also requires labor for collecting chips generated when a part of the pipe is cut.

  Further, in Patent Document 2, since it is a cutting process for a part of the pipeline in the casing, the above-mentioned work with the danger does not occur, but occurs when cutting a part of the pipeline in the casing. There was a problem that the cut chips flowed into the pipeline.

  The present invention has been made paying attention to such a problem, and can prevent chips generated when cutting an existing fluid pipe from flowing into the fluid pipe, and can involve dangerous work. An object of the present invention is to provide a continuous water control body installation device for an existing fluid pipe.

In order to solve the above-described problem, the continuous water control body installation device according to claim 1 of the present invention provides:
A part of an existing fluid pipe having a free surface in the pipe is surrounded by a casing having an open top , and the excision location of the existing fluid pipe in the casing is excised with a wire saw in an undisturbed water state. A water control body installation device for an existing fluid pipe that installs a water control body composed of:
An opening through which fluid can flow is formed in the partition wall, and a water stop plate capable of opening and closing the opening is provided in the partition wall, and the partition wall is mounted on an inner surface and an inner bottom surface of the housing. The bulging step portion to be placed is formed to bulge inwardly, and a guide for guiding the partition wall is provided on both sides of the bulging step portion formed on the inner side surface of the casing. The drainage means capable of draining the accumulated water in the casing is provided on the upstream side and the downstream side of the bulging step portion of the casing. .
According to this feature, the stagnant water that leaks into the casing when the fluid pipe is excised and stays divided on the upstream side and downstream side of the bulging step is drained out of the casing by the drainage means. Therefore, when this stagnant water is drained, chips generated when the fluid pipe is excised and mixed in the stagnant water can be discharged, and the inflow of chips into the fluid pipe can be prevented. In addition, it is possible to excise the existing fluid pipe and collect chips by using a wire saw in a case with a free water surface that is open at the top. , safety der is, also no need to use a work-off valve and a working housing, can be a non-suspension of water supply system of water body installation apparatus to a simple configuration. An opening through which fluid can flow is formed in the partition wall, and a water stop plate for opening and closing the opening is provided in the partition wall, so that a water control body composed of the partition wall is formed on the inner surface of the housing. It is possible to install a continuous water control body that opens and closes the flow path simply by lowering along.

The continuous water control body installation device according to claim 2 of the present invention is the continuous water control body installation device according to claim 1,
The water stop plate is provided on the upstream side of the flow path of the partition wall, and the partition wall is installed on the downstream side of the flow path from the center in the tube axis direction inside the housing.
According to this feature, using the pressure of the fluid that works from the upstream side of the flow channel toward the downstream side of the flow channel,
By pressing the water stop plate provided on the upstream side of the flow channel toward the partition wall on the downstream side of the flow channel, the opening can be closed watertight. In addition, by installing the partition wall on the downstream side of the flow path from the center in the tube axis direction inside the housing, the water stop plate provided on the upstream side of the flow path in the partition wall can be arranged on the center side in the tube axis direction. The water plate can be opened and closed without contacting the inner surface of the housing.

The continuous water control body installation device according to claim 3 of the present invention is the continuous water control body installation device according to claim 2,
The opening is substantially the same diameter as the existing fluid pipe, and is formed so that the center of the opening is located on the pipe axis.
According to this feature, the existing fluid pipe and the opening have substantially the same cross section, so that the fluid in the existing fluid pipe can be prevented from generating vortex or turbulence when passing through the opening, and the fluid resistance can be reduced. You can pass through.

The continuous water control body installation device according to claim 4 of the present invention is the continuous water control body installation device according to any one of claims 1 to 3,
A base portion that supports the existing fluid pipe in a vertical direction is provided on the upstream side and the downstream side of the flow passage of the housing, and the drainage means removes the accumulated water in the housing of the base portion. It is characterized in that it can be derived outward.
According to this feature, the stagnant water in the housing can be led out to the outside of the base portion that supports the existing fluid pipe in the vertical direction, so that the stagnant water led out of the base portion can be easily handled.

The continuous water control body installation device according to claim 5 of the present invention is the continuous water control body installation device according to claim 4,
A joint part of the existing fluid pipe is provided on the upstream side or the downstream side of the flow path of the casing, and the base part supports the joint part in the vertical direction.
According to this feature, the joint portion, which is relatively unstable in the pipeline when the existing fluid pipe is excised, is supported in the vertical direction by the base portion. The excision location of the tube can be set arbitrarily.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a side view showing a state in which a part of an existing fluid pipe in the embodiment of the present invention is exposed. FIG. 2 is a side sectional view showing a state in which a part of an existing fluid pipe is surrounded by a casing. FIG. 3 is a side cross-sectional view showing a state where an existing fluid pipe in the housing is cut away. FIG. 4 is a side cross-sectional view showing a situation in which a water control body is installed in the housing. FIG. 5 is a side cross-sectional view showing a situation in which a water control body is installed in the housing. 6 is a cross-sectional view taken along the line AA in FIG. FIG. 7A is a partial cross-sectional view of the water control body when the water stop plate is in an open state, FIG. 7B is a partial cross-sectional view of the water control body when the water stop plate is in a closed state, and FIG. It is a sectional side view of a water control body.

  First, as shown in FIG. 1, the existing fluid pipe 1 of the present embodiment is buried in the ground below the ground surface of the original ground G, and is a pipe mainly for flowing sewage, and the inside of the pipe is free. Sewage having a surface flows from the upstream side of the channel (left side in the figure) toward the downstream side of the channel (right side in the figure). Among the existing fluid pipes 1 buried in the ground, the existing fluid pipes 1 in this part are entirely covered over a predetermined length in the tube axis direction including the excision location C of the existing fluid pipe 1 described later. The original ground G is excavated so as to be exposed in the circumferential direction, and excavation pits P are formed. A joint portion 6 of the existing fluid pipe 1 is formed in the vicinity of the flow path upstream of the cutting location C, and a joint portion 7 is similarly formed in the vicinity of the downstream side of the flow path.

  On the bottom surface of the excavation pit P formed by excavation of the original ground G, a crushed stone 2 is laid and a concrete base 3 is placed by a predetermined thickness so as to serve as a basis for a cutting process or the like. Further, a band 4 having a divided structure is fixedly attached to the excised portion C of the existing fluid pipe 1 in the entire circumferential direction of the pipe body. At the upper end of the band 4, a lifting tool 5 for lifting the cut piece is provided.

  Next, as shown in FIG. 2, a casing 10 having an inner structure and an upper and lower divided structure is attached along the circumferential direction of the existing fluid pipe so as to surround the cut portion C of the existing fluid pipe 1. . The upper part of the casing 10 is a rectangular cylindrical body having an open upper end, and the lower end is connected to the lower end of the upper part of the casing 10 continuously at the upper end, and the lower end of the existing fluid pipe 1. It has an arc-shaped bottom having a larger diameter than the outer periphery.

  The casing 10 is watertightly connected to the outer periphery of the existing fluid pipe 1 via a packing (not shown). The upper end of the housing 10 opens upward. Further, leg portions 13, 13 extend downward at the lower end portion of the housing 10, and the housing 10 is supported on the concrete 3 by the leg portions 13, 13.

  In addition, base legs 8 and 9 as base portions for supporting the existing fluid pipe 1 in the vertical direction are erected from the concrete base 3 on the upstream side and the downstream side of the flow path of the housing 10. The base legs 8 and 9 support the lower halves of the joint portions 6 and 7 provided in the vicinity of the flow channel upstream side and the flow channel downstream side of the housing 10 in contact with each other in the circumferential direction. As shown in FIG. 2, the base legs 8 and 9 and the concrete base 3 are formed in a U shape that opens upward in a side view.

  The casing 10 will be described in more detail. On the inner side surface and the inner bottom surface of the casing 10, bulging step portions 10a and 10b that bulge inward are continuously formed. The water control body 20 is installed in the stepped portions 10a and 10b as described later. A drainage opening 10c is formed on the upstream side of the flow path of the bulging step portion 10b that bulges upward on the inner bottom surface of the housing 10, and one end of the drainage pipe 11 is connected to the drainage opening 10c in succession. The pipe 11 extends between the base legs 8 and 9 toward the side of the existing fluid pipe 1, and a drain outlet 15 is provided at the other end of the drain pipe 11 through which the accumulated water in the housing can be drained. . Similarly, a drain opening 10d is formed on the downstream side of the flow path of the bulging step portion 10b that bulges upward on the inner bottom surface of the housing 10, and one end of the drain pipe 12 is connected to the drain opening 10d. The drain pipe 12 extends between the base legs 8 and 9 toward the side of the existing fluid pipe 1, and the drain pipe 12 is provided with a drain port 17 at the other end of the drain pipe 12 through which the accumulated water in the housing can be drained. It has been.

  As shown in FIGS. 5 and 6, the drainage port 17 is opened outside the base legs 8 and 9, and can be opened and closed by a valve 16. Although not particularly illustrated, similarly, the drain port 15 is opened outside the base leg 8 and the base leg 9, and is provided to be opened and closed by a valve (not shown). The drain opening 10c, drain pipe 11, valve (not shown), and drain port 15 formed on the upstream side of the flow path of the bulging step portion 10b of the casing 10 are retained in the casing 10 as will be described later. It constitutes drainage means that can drain water. Similarly, the drain opening 10d, the drain pipe 12, the valve 16, and the drain port 17 formed on the downstream side of the flow path of the bulging step portion 10b of the casing 10 are used to store the accumulated water in the casing 10 as will be described later. It constitutes drainage means that can drain.

  Further, the bulging step portion 10a and the bulging step portion 10b formed continuously on the inner side surface and the inner bottom surface of the housing 10 are slightly on the downstream side of the flow path with respect to the center of the side cross-sectional view tube axis direction. Is provided.

  Next, as shown in FIG. 3, the excision location C of the existing fluid pipe 1 in the housing 10 is excised in an indefinite water state. The cutting means is not particularly shown, but the existing fluid pipe 1 is cut into two cut surfaces by a wire saw cutter wound around the outer peripheral surface of the pipe body on the upstream side and downstream side of the band 4. Cut at 1a, 1b.

  As described above, the joint portions 6 and 7 of the existing fluid pipe 1 are provided in the vicinity of the upstream side of the flow path and the downstream side of the flow path of the housing 10, and the comparison is made in the pipe line when the existing fluid pipe 1 is excised. Since the joint portions 6 and 7 that become unstable are supported in the vertical direction by the base legs 8 and 9, the excision location C of the existing fluid pipe 1 can be arbitrarily set regardless of the installation position of the joint portions 6 and 7. Can be set. In addition, the joint part of the existing fluid pipe 1 is not necessarily limited to those provided on both sides of the casing 10 on the upstream side and the downstream side of the flow path as in this embodiment. The casing 10 may be provided on the upstream side of the flow path or on one side near the downstream side of the flow path.

  And although not shown in particular, after the existing fluid pipe 1 is cut by the two cut surfaces 1a and 1b, the pipe pieces between the two cut surfaces 1a and 1b separated from the existing fluid pipe 1 are replaced with the hanger 5 of the band 4. It is lifted by a lifting machine connected to the wire via a wire. As a matter of course, the two cut surfaces 1a and 1b are located upstream of the flow path with the bulging step portions 10a and 10b coming into contact with the side peripheral surface of the partition wall 21 of the water control body 20 installed as described later. Formed on the downstream side and the downstream side of the flow path, and chips generated when the existing fluid pipe 1 is cut are expanded on the bottom surface of the housing 10 near the cut surface, specifically, on the bottom surface of the housing 10. It stays on the upstream side of the flow channel and the downstream side of the flow channel with the stepped portion 10b interposed therebetween. The swarf staying on the bottom surface of the housing 10 is drained together with the staying water in the housing 10 from the drain ports 15 and 17.

  In this way, when the existing fluid pipe 1 is excised, the remaining water that leaks into the housing 10 and stays divided on the upstream side and the downstream side of the bulging step portion 10b is discharged to the drain port 15, 17 can be drained out of the housing 10, so that when the accumulated water is drained, the chips generated when the existing fluid pipe 1 is excised and mixed in the accumulated water can be discharged. It is possible to prevent chips from flowing into Moreover, since the existing fluid pipe 1 can be excised and the chips can be collected in the housing 10, it is safe without any dangerous work in the excavation pit P excavating the original ground G.

  In addition, since the existing fluid pipe 1 can be led out of the base legs 8 and 9 supporting the existing fluid pipe 1 in the vertical direction in this way, specifically, the drain ports 15 and 17 opened outside the base legs 8 and 9. Therefore, it is easy to handle the accumulated water discharged outside the base legs 8 and 9. Although not particularly shown as handling of the staying water, for example, the staying water is introduced into a drainage receiving tank having a relatively low height disposed on the bottom surface of the excavation pit P outside the base legs 8 and 9, or the drainage. A pump is arranged in the receiving tank, and the accumulated water can be discharged outside the excavation pit P by this pump.

  Moreover, the two cutting surfaces 1a and 1b facing each other formed by excision of the existing fluid pipe 1 are formed in a tapered shape so that the distance between them is gradually increased upward. Thus, when the pipe piece is lifted upward, the pipe pieces are prevented from coming into contact with the cut surfaces 1a and 1b whose distance from each other is gradually increased upward, thereby making it easy to lift. Has an effect.

  Next, as shown in FIG. 3, after excision of the existing fluid pipe 1, the cylindrical body 14 is connected to the upper portion of the housing 10. The cylindrical body 14 is open both vertically, and is provided on the inner side surface of the cylindrical body 14 so as to project from the bulging step portion 10a formed on the inner side surface of the housing 10 and both sides of the bulging step portion 10a. The bulging step portion 14a and the guides 14e, 14e are projected along the vertical direction so as to be continuous with the guides 10e, 10e.

  It should be noted that when the existing fluid pipe 1 is cut, naturally, the fluid in the pipe leaks into the housing 10, but the inside of the existing fluid pipe 1 has a free surface as described above. In addition, since the water level does not rise beyond the free surface height in the housing 10 after cutting, the existing fluid pipe 1 can be cut without requiring a special upper lid on the top of the housing 10.

  Next, installation of the water control body 20 will be described.

  As shown in FIG. 7, the water control body 20 of the present embodiment is mainly composed of a partition wall 21 extending in the vertical direction and an upper lid 22 extending in the horizontal direction continuously to the upper end of the partition wall 21, and further partitioning An opening 21 a is formed in the wall 21, and a water stop plate 24 that can open and close the opening 21 a is attached to a surface of the partition wall 21 facing the upstream side of the flow path via a bracket 23. The partition wall 21 partitions the inside of the housing 10 and the inside of the cylinder body 14 connected to the housing 10 into a flow channel upstream side and a flow channel downstream side, and the upper lid 22 can seal the upper end of the cylinder body 14. Is formed.

  As shown in FIGS. 7A to 7C, more specifically, with respect to the partition wall 21, a seal member 30 is provided in a recess formed along the side peripheral surface of the partition wall 21. Further, a circular opening 21a having the same diameter as that of the existing fluid pipe 1 is formed near the lower portion of the partition wall 21 in the vertical direction, and the opening 21a is formed on the upstream surface of the partition wall 21 on the flow path. A water stop plate 24 that moves up and down so as to be openable and closable is attached. The water stop plate 24 is screwed into the lower portion of the screw rod 26 inserted in the vertical direction into the insertion hole 22 a formed in the upper lid 22, and is operated to be screwed into the upper portion of the screw rod 26 above the upper lid 22. By rotating the handle 28 (see FIGS. 5 and 6), the water stop plate 24 moves up and down along the guide 25 to open and close the opening 21a. That is, the opening 21a is opened by moving the water stop plate 24 upward, and the opening 21a is closed by moving downward.

  As shown in FIG. 7C, the upper lid 22 is formed in a substantially U-shape that opens downward in a side sectional view, and a seal member 29 is provided in a recess formed along the outer surface. . Moreover, the coating | coated part 27 which coat | covers the circumference | surroundings of the screw rod 26 watertightly is installed from the upper surface of the upper cover 22 (refer FIG. 5).

  As shown in FIGS. 4 and 5, the water control body 20 configured as described above is lowered from the opening 14 b opened above the cylinder body 14 by a lifting machine (not shown), and the inside of the cylinder body 14. The inside of the housing 10 is suspended. The water control body 20 is lowered along the guides 14e and 10e, the lower surface of the upper lid 22 contacts the bulging portion 14c provided along the inner peripheral surface of the cylindrical body 14, and a seal member 30 is provided. The side peripheral surface is placed in the housing 10 in contact with the bulging step portions 10a and 10b. By the seal member 30, the side peripheral surface of the partition wall 21 and the inner surface of the housing 10 are in watertight contact. Similarly, the outer surface of the upper lid 20 and the inner surface of the cylindrical body 14 are in watertight contact by the seal member 29. . After the water control body 20 is installed, the lid portion 19 is fixedly installed on the upper surface of the cylindrical body 14.

  In the state where the partition wall 21 is placed in the housing 10, the opening 21 a is substantially the same diameter as the existing fluid pipe 1 as described above, and the opening center is located substantially on the tube axis. ing. By doing in this way, since the existing fluid pipe 1 and the opening 21a have substantially the same cross section, the fluid in the existing fluid pipe 1 is caused to generate vortex or turbulence when passing through the opening 21a. It is possible to suppress and pass the fluid resistance.

  Further, as described above, an opening 21a through which fluid can flow is formed in the partition wall 21, and a water stop plate 24 capable of opening and closing the opening 21a is provided on the upstream side of the flow path of the partition wall 21, The partition wall 21 is installed on the downstream side of the flow channel from the center in the tube axis direction inside the housing 10. In this way, the water stop plate 24 provided on the upstream side of the flow path is connected to the downstream side of the flow path using the pressure of the fluid in the existing fluid pipe 1 that works from the upstream side of the flow path toward the downstream side of the flow path. By pressing toward the partition wall 21, the opening 21 a can be watertightly closed. Further, by installing the partition wall 21 on the downstream side of the flow path from the center in the tube axis direction inside the housing 10, the water stop plate 24 provided on the upstream side of the flow path of the partition wall 21 is disposed on the center side in the tube axis direction. Therefore, the opening / closing operation can be performed without bringing the water stop plate 24 into contact with or sliding on the inner surface of the housing 10.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  Moreover, in the said Example, the existing fluid pipe | tube 1 is embed | buried under the ground below the ground surface of the original ground G, and is a pipe | tube for mainly flowing sewage, Comprising: The sewage which has a free surface flows in the pipe | tube. However, the existing fluid pipe is not necessarily limited to the one buried in the ground, and may be one exposed in the air. Further, the fluid in the existing fluid pipe does not necessarily flow constantly in the pipe, and may flow intermittently.

It is a side view which shows the condition which exposed a part of existing fluid pipe | tube in the Example of this invention. It is a sectional side view which shows the condition which enclosed a part of existing fluid pipe | tube with the housing | casing. It is a sectional side view which shows the condition which excised the existing fluid pipe | tube in a housing | casing. It is a sectional side view which shows the condition which has installed the water control body in the housing | casing. It is a sectional side view which shows the condition which installed the water control body in the housing | casing. It is AA sectional drawing of FIG. (A) is a partial cross-sectional view of the water control body in the open state, (b) is a partial cross-sectional view of the water control body in the closed state, and (c) is a control view. It is a sectional side view of a water body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing fluid pipe 2 Crushed stone 3 Concrete base 4 Band 5 Lifting tool 6 Joint part 7 Joint part 8 Base leg (base part)
9 Base leg (base part)
10 Housing 10a, 10b Swelling step 10c, 10d Drain opening (drainage means)
10e Guide 11, 12 Drain pipe (drainage means)
13 Leg 14 Cylinder 15, 17 Drain port (drainage means)
16 Valve (drainage means)
19 Lid 20 Water control body 21 Partition wall 21a Opening 22 Upper wall 23 Bracket 24 Water stop plate 25 Guide 26 Screw rod 27 Covering part 28 Operation handle 29, 30 Seal member

Claims (5)

A part of an existing fluid pipe having a free surface in the pipe is surrounded by a casing having an open top , and the excision location of the existing fluid pipe in the casing is excised with a wire saw in an undisturbed water state. A water control body installation device for an existing fluid pipe that installs a water control body composed of:
An opening through which fluid can flow is formed in the partition wall, and a water stop plate capable of opening and closing the opening is provided in the partition wall, and the partition wall is mounted on an inner surface and an inner bottom surface of the housing. The bulging step portion to be placed is formed to bulge inwardly, and a guide for guiding the partition wall is provided on both sides of the bulging step portion formed on the inner side surface of the casing. The drainage means capable of draining the accumulated water in the casing is provided on the upstream side and the downstream side of the bulging step portion of the casing. A continuous water control body installation device. The water stop plate is provided on the upstream side of the flow path of the partition wall, and the partition wall is installed on the downstream side of the flow path from the center in the tube axis direction inside the housing. Item 5. A continuous water control body installation device according to item 1.   The continuous water control body installation device according to claim 2, wherein the opening has a diameter substantially the same as that of the existing fluid pipe, and the center of the opening is located substantially on the pipe axis.   A base portion that supports the existing fluid pipe in a vertical direction is provided on the upstream side and the downstream side of the flow passage of the housing, and the drainage means removes the accumulated water in the housing of the base portion. The continuous water control body installation device according to any one of claims 1 to 3, wherein the continuous water control body installation device is provided so as to be led out to the outside.   The joint part of the existing fluid pipe is provided on the upstream side or the downstream side of the flow path of the housing, and the base part supports the joint part in the vertical direction. Item 5. The continuous water control body installation device according to item 4.

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