JP4196021B2 - Seismic isolation piping suspension system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic isolation piping structure for preventing piping from being damaged by an earthquake or the like, and more particularly, to a suspension device for a seismic isolation piping structure at a bent portion of a laid pipe line.
[0002]
[Prior art]
In factories and various plants, many pipes are laid in the facility. These pipes are supported and fixed by the support part installed in the ground and the support part provided in structures such as buildings and equipment, and are laid along the laying route, but when the ground shakes due to an earthquake etc., In many cases, relative displacement between the structure and the ground in the horizontal direction and the vertical direction (hereinafter, typically referred to as the horizontal direction) may occur, resulting in damage to the piping. In order to absorb such a relative displacement in the horizontal direction, a method of connecting a pipe via a flexible bent pipe joint is adopted at a bent portion of the pipe line. However, in order to absorb a somewhat large displacement, a considerably long bent pipe joint is required.
[0003]
[Problems to be solved by the invention]
However, when a considerably long flexible bent pipe joint is used, the bent pipe joint hangs down, and the bent pipe joint is constantly subjected to deformation stress, reducing its strength and shortening its life. Cause problems.
Therefore, an object of the present invention is to provide a new seismic isolation piping structure that solves these problems in the bent portion of such a pipe and a suspension device used therefor.
[0004]
[Means for Solving the Problems]
The suspension device of the seismic isolation piping structure according to claim 1 for solving the above-described problem is obtained by connecting the pipes 3 and 4 via the flexible bent pipe joint 5 so that the bent portion 2 of the pipe line 1 is provided. a seismic isolation pipe structure formed in hanging apparatus seismic isolation piping structure that is suspended swingably from above by way hanging device 7 of the bent pipe joint 5,
A connecting pedestal 16 fixed to the flange connection between the flexible bent pipe joint 5 and the pipes 3 and 4;
A cantilever suspension arm 8 whose one end is supported by the connecting base 16;
A suspension 11 attached to the other end of the suspension arm 8, and
The suspension device has a seismic isolation piping structure configured such that the middle of the bent pipe joint 5 is supported by the suspension tool 11.
Since the middle of the bent pipe joint 5 is suspended from the upper side in this way, even if a considerably long bent pipe joint 5 is used, it is possible to avoid the downward hanging of the intermediate portion due to its flexibility. It is possible to effectively prevent a decrease in pipe strength and life.
Further, since the bent pipe joint 5 is swingably suspended from the suspension device 7, when the bending pipe joint 5 is subjected to a deformation stress, a lateral movement force, or the like due to an earthquake or the like, the bent pipe joint 5 is connected to the pipe 3. , 4 can be freely deformed and moved according to the flexibility. Therefore, the seismic isolation function by the bent pipe joint 5 can be sufficiently exhibited.
Further, the connecting pipe 16 attached to the pipe has a cantilevered suspension arm 8 supported at one end, and a suspension tool 11 attached to the other end of the suspension arm 8 is used to place the bent pipe joint 5 in the middle. Therefore, it is possible to provide a seismic isolation piping structure that is easy to install and highly reliable.
[0005]
The suspension device with the seismic isolation piping structure according to claim 2 is an embodiment of the suspension device with the seismic isolation piping structure according to claim 1, wherein the suspension device 7 has a suspension arm 8 that can be expanded and contracted, The bent pipe joint 5 is suspended from the suspension arm 8 in a swingable manner.
Thus, by providing the extendable suspension arm 8, the suspended portion of the bent pipe joint 5 can be adjusted to an optimum position.
The suspension device with the seismic isolation piping structure according to claim 3 is a preferred embodiment of the suspension device with the seismic isolation piping structure according to claim 2, and the suspension arm 8 is pivotally supported by the pipes 3 and 4. It is characterized by that.
By supporting the suspension arm 8 on the pipes 3 and 4 so as to be able to turn in this way, when the bending pipe 5 is subjected to a deformation stress, a moving force such as a lateral direction, etc. due to an earthquake or the like, the bending pipe 5 is connected to the pipe. Without being influenced by 3 and 4, the deformation and movement according to the flexibility can be performed in a larger range.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of the seismic isolation piping structure of the present invention.
The bent portion 2 of the pipeline 1 is flange-connected between the ends of the pipe 3 and the pipe 4 that extend horizontally and linearly from directions different from each other by 90 degrees and between the ends of the pipe 3 and the pipe 4. It is constituted by a flexible bent pipe joint 5. The pipes 3 and 4 may be metal pipes such as cast iron pipes or resin pipes such as hard vinyl chloride pipes.
[0008]
The flexible bent pipe joint 5 is a flexible joint configured such that both ends thereof are positioned in a non-linear manner so that ends of pipes extending from different directions can be connected. As shown in FIG. 1, when the pipe 3 and the pipe 4 extend at an angle different by 90 degrees, an elbow-shaped bent pipe joint 5 bent by 90 degrees is used. A flexible bent pipe joint 5 that can be used is a reinforcing nylon cord or a metal wire embedded in a tubular body in which a flexible material such as rubber or plastic is formed in a bellows shape. 6 is provided. Further, a bellows portion may be provided only in the vicinity of the end as shown in FIG. Furthermore, the bellows portion may not exist.
[0009]
The seismic isolation piping structure of the present invention is one in which two bent pipe joints 5 are suspended in a swingable manner from above by a pair of suspension devices 7 supported by the piping 3 and the piping 4. The suspension device 7 includes a telescopic suspension arm 8 configured by combining an elongated base portion 9 having a U-shaped cross section and an elongated slide portion 10 having a U-shaped cross section, and a lifting tool 11 attached to the distal end portion thereof. The middle of the bent pipe joint 5 is suspended. As the lifting tool 11, for example, a linear body such as a flexible rope is formed in a loop shape having a diameter larger than the outer diameter of the bent pipe joint 5, and attached to the tip of the suspension arm 8, The bent pipe joint 5 can be suspended in a swingable manner.
[0010]
As shown in FIG. 2, the base portion 9 is provided with one bolt hole 12 on the bottom near one end thereof, and two bolt holes 13 on the bottom near the other end. A slit 14 that is elongated in the longitudinal direction is provided on the bottom near the end, and one bolt hole 15 is provided on the bottom near the other end.
The base portion 9 is rotatably supported by the flange 17 of the pipe 3 (or the flange 18 of the pipe 4) via the connection base 16. The connecting pedestal 16 is composed of a connecting portion 16a and a pedestal portion 16b orthogonal to the connecting portion 16a. As shown in FIG. Bolt holes 16d are provided. The pedestal portion 16b is formed in a disk shape, and one screw hole 16e is provided in the vicinity of the periphery thereof.
[0011]
Next, a method for supporting the suspension device 7 on the pipe 3 will be described with reference to FIG. 2. First, the base portions 9 and the slide portion 10 are overlapped with each other on their backs, and the whole becomes a predetermined length. Thus, the bolt hole 13 and the slit 14 are aligned, and the two bolts 14a are used to couple them.
Next, two bolts 19 for fastening the flange 17 of the pipe 3 (or the flange 18 of the pipe 4) and the flange 6 of the bent pipe joint 5 are removed, and the connecting portion 16a of the connecting base 16 is brought into close contact with the side surface of the flange 17. The two bolt holes 16d of the connecting portion 16a are aligned with the bolt holes of the flange 17. Next, the bolt 19 is inserted into the bolt hole of the flanges 6 and 17 and the bolt hole 16d of the connecting portion 16a and a nut (not shown) is screwed to support the connecting base 16 to the pipe 3. Next, the bolt 20 is passed through the washer 21 and inserted into the bolt hole 12 of the base portion 9 and screwed into the screw hole 16e of the base portion 16b, whereby the suspension arm 8 is rotatably connected to the connection base 16. .
[0012]
Next, an eyebolt 22 provided with a ring-shaped insertion hole in the head is inserted into the bolt hole 15 of the slide portion 10, and is hooked with a nut 23. Then, the end of the hanger 11 suspended from the middle of the bent pipe joint 5 is inserted through the eyebolt 22 and connected to the state shown in FIG. When the hanging position of the bent pipe joint 5 is not appropriate, the length of the hanging arm 8 may be adjusted.
As described above, the suspension arm 8 can be pivotably supported with respect to the pipe 3 by fixing the bolt 20 to the screw hole 16e of the base portion 16b. As a result, the bent pipe joint 5 can be deformed or moved more freely. However, when such a degree of freedom is not required, it is possible to prevent the suspension arm 8 from turning with respect to the pipe 3 by firmly fastening the bolt 20 to the screw hole 16e of the base portion 16b.
[0013]
Next, the operation of the seismic isolation pipe structure shown in FIG. 1 will be described. For example, when the pipe 3 is supported on the structure side and the pipe 4 is supported on the ground side, When a relative force such as an arrow A is applied to the pipe 4 on the side, the bent pipe joint 5 moves the part on the pipe 4 side in the direction A by the force, and the part on the pipe 3 side is accompanied by the arrow. It is bent in the A direction and deformed. At this time, since the portion on the pipe 3 side is suspended swingably on the hanging tool 11, it can be freely deformed without being affected by the pipe 3. When a relative force in the direction opposite to the arrow A is applied to the ground side pipe 4, the pipe 3 side portion is bent and deformed in the direction opposite to the arrow A accordingly. When a relative force such as an arrow B is applied to the construction-side piping 3 with respect to the ground-side piping 4, the bent fitting 5 moves the portion on the piping 3 side in the B direction by the force. The portion on the pipe 4 side is bent and deformed in the direction of arrow B accordingly. At that time, since the portion on the side of the pipe 4 is swingably suspended from the hanger 11, it can be freely deformed without being affected by the pipe 4. Further, when a relative force in the direction opposite to the arrow B is applied to the pipe 3 on the structure side, the portion on the pipe 4 side is bent and deformed in the direction opposite to the arrow B accordingly.
[0014]
【The invention's effect】
As described above, the suspension device having the seismic isolation pipe structure described in claim 1 is considerably long because the middle part of the bent pipe joint is suspended from the upper side by the suspension device supported by the pipe. Even when a bent pipe joint is used, it is possible to avoid a downward drop of the intermediate portion due to its flexibility, and it is possible to effectively prevent the pipe strength and life of the portion from being lowered.
Also, since bent pipe joints are swingably suspended from a suspension device, bent pipe joints are affected by piping when a bending stress is applied to the bent pipe joints due to an earthquake or the like. Without being deformed or moved in accordance with the flexibility. Therefore, it becomes possible to fully exhibit the seismic isolation function by the bent pipe joint.
Furthermore, a cantilever suspension arm 8 supported at one end by a connecting base 16 attached to the pipe is provided, and a suspension tool 11 attached to the other end of the suspension arm 8 is used in the middle of the bent pipe joint 5. Therefore, it is possible to provide a suspension device having a seismic isolation piping structure that is easy to install and highly reliable.
[0015]
Further, the suspension device of the seismic isolation piping structure according to claim 2 has a suspension arm that can be expanded and contracted, and the bent pipe joint is suspended swingably on the suspension arm. Can be adjusted to the optimum position.
Further suspension device seismic isolation pipe structure according to claim 3, since the hanging arm is pivotally supported on the pipe, when the moving force, such deformation stress and laterally bent pipe fittings such as by an earthquake is given In addition, the bent pipe joint can be deformed and moved in accordance with its flexibility without being affected by the piping within a larger allowable range.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a seismic isolation piping structure of the present invention.
2 is an exploded perspective view showing a suspension device 7 in the seismic isolation piping structure of FIG. 1;
3 is an enlarged front view of a connecting base 16 in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe line 2 Bending part 3 Piping 4 Piping 5 Bending pipe joint 6 Flange 7 Lifting device 8 Suspension arm 9 Base part 10 Sliding part 11 Suspension tool 12 Bolt hole 13 Bolt hole 14 Slit part 14a Bolt 15 Bolt hole 16 Connection base 16a Connection Part 16b base part 16c arc part 16d bolt hole 16e screw hole 17 flange 18 flange 19 bolt 20 bolt 21 washer 22 eye bolt 23 nut

Claims (3)

In the seismic isolation piping structure in which the bent portion 2 of the pipe line 1 is formed by connecting the pipes 3 and 4 through the flexible bent pipe joint 5, the middle of the bent pipe joint 5 is a suspension device 7. In the suspension device of the seismic isolation pipe structure that is suspended swingably from above by
A connecting pedestal 16 fixed to the flange connection between the flexible bent pipe joint 5 and the pipes 3 and 4;
A cantilever suspension arm 8 whose one end is supported by the connecting base 16;
A suspension 11 attached to the other end of the suspension arm 8, and
A suspension device having a seismic isolation piping structure configured so that the bent pipe joint 5 is supported by the suspension 11. Suspension device 7 has a telescopic suspension arm 8, the hanging device seismic isolation pipe structure according to claim 1 in which the bent pipe joint 5 in the hanging Ri arms 8 are suspended to swing freely. The suspension device of the seismic isolation piping structure according to claim 2, wherein the suspension arm 8 is rotatably supported by the pipes 3 and 4.

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