JP2000028043A - Piping fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting device capable of allowing relative fluctuation of piping caused by earthquakes or the like having no unevenness therein and suppressing deposition of impurities and pressure fluctuation. SOLUTION: This pipe fitting device 10A comprises: a pipe body 11 connected with piping P, circumferential reinforcement members 12 fixed on a peripheral side of the pipe body 11 and extending in a circumferential direction of the pipe body 11; and axial reinforcement members 13 along an axial direction of the pipe body 11. The pipe body 11 is constituted of thin pipes thinner than the piping P connected with the pipe body 11 and flexible. The annular circumferential reinforcement members 12 are spaced out on plural points in the axial direction of the pipe body 11. The rod-like axial reinforcement members 13 are spaced out on plural points in the circumferential direction of the pipe body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint device suitably used for connecting pipes in various plant facilities, for example.

[0002]

2. Description of the Related Art In various types of plant equipment having high-pressure pipes and the like, pipes that withstand high pressure generally have a relatively large wall thickness due to large axial stress and circumferential stress due to the pressure (internal pressure) of a fluid flowing inside. Piping is used. This type of piping has high rigidity against bending. In the case of so-called "crossover piping" provided between multiple buildings, if the thickness of the piping is thick, excessive stress is applied to the piping when relative displacement occurs between buildings due to an earthquake etc.
The structural integrity may be affected.

[0003] Conventionally, expandable joint devices 1A and 1B as shown in FIGS. 8 (A) and 8 (B) have been used as devices which allow relative displacement of pipes due to an earthquake or the like. FIG.
8A is a so-called hinge type, and FIG.
The joint device 1B shown in (B) is called a gimbal type. Each of these joint devices 1A and 1B includes a bellows 3 connected to the pipe 2, a frame 4 for restraining the maximum displacement of the bellows 3, and the like. The frame 4 is configured to be rotatable around the support shaft 5 within a certain angle range. These joint devices 1A and 1B and the pipe 2
Constitutes a piping structure 7 as shown in FIG. 9, for example. When a relative displacement occurs in the pipe 2 due to an earthquake or the like, the pipe structure 7 allows the relative displacement of the pipe 2 by bending the bellows 3.

[0004]

In the joint device using a bellows as in the prior art, since the inner surface of the bellows 3 has unevenness as shown in FIG. There is a possibility that the fluctuation will increase or impurities causing corrosion will accumulate on the inner surface of the bellows 3. Further, the joint device using the expandable and contractable bellows 3 has room for improvement, such as a small design margin in terms of strength.

Therefore, an object of the present invention is to allow relative displacement of pipes due to an earthquake or the like, and there is no unevenness such as a bellows on the inner surface, thereby suppressing the accumulation of impurities and the occurrence of pressure fluctuation, and An object of the present invention is to provide a pipe joint device having high strength.

[0006]

According to a first aspect of the present invention, there is provided a pipe joint device comprising a thin pipe connected to a pipe and having a smaller thickness than the pipe.
A circumferential reinforcing member fixed to an outer peripheral side of the pipe body and extending in a circumferential direction of the pipe body; and an axial reinforcing member provided on an outer peripheral side of the pipe body and extending in an axial direction of the pipe body. .

[0007] The present invention includes that the circumferential reinforcing member is an annular reinforcing member provided at a plurality of locations at intervals in the axial direction of the pipe body. Further, the invention includes that the circumferential reinforcing member is a spiral reinforcing member spirally wound around a pipe body. Further, the present invention also includes that the circumferential reinforcing member and the axial reinforcing member are embedded in a filler provided on the outer periphery of the pipe body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A piping joint device 10A according to a first embodiment of the present invention will be described below with reference to FIGS.

A pipe joint device 10A shown in FIG. 1 comprises a pipe body 11 formed of a thin metal pipe having a curved elbow shape, a plurality of circumferential reinforcing members 12 provided on the outer periphery of the pipe body 11, and a pipe body. A plurality of axial reinforcing members 13 and the like provided on the outer periphery of 11 are provided.
The thickness of the pipe body 11 functioning as the inner pressure-resistant pipe is thinner than the thickness of the pipe (for example, a high-pressure pipe) P to be connected, and is a deformable thin pipe capable of exhibiting some flexibility against bending. It is constituted by.

The circumferential reinforcing member 12 is a pipe body 11
Are provided at intervals in the axial direction (the direction indicated by arrow X in FIG. 1). These circumferential reinforcing members 12
As shown in FIG. 2, each is made of an annular metal material extending in the circumferential direction Y of the pipe body 11, and its inner peripheral surface is in contact with the outer peripheral surface of the pipe body 11. A plurality of holes 14 penetrating in the axial direction of the pipe body 11 are formed in these circumferential reinforcing members 12 at predetermined intervals in the circumferential direction Y of the pipe body 11.

On the other hand, the axial reinforcing members 13
The pipe body 1 is made of a rod-shaped metal material extending in the axial direction of the pipe body 11 (the direction indicated by the arrow X) and curved in an arc shape along the outer shape of the pipe body 11.
It is arranged so as to be substantially parallel to one axis.
These axial reinforcing members 13 are respectively inserted into the holes 14 of the circumferential reinforcing member 12.

That is, the pipe joint device 10 of this embodiment
A uses a pipe body 11 made of a thin-walled bent pipe that is soft against bending, and the circumferential reinforcing member 12 and the axial reinforcing member 13 are connected by pipes in order to increase the strength against internal pressure by reducing the thickness of the pipe body 11. It is provided so as to be in contact with the outer peripheral surface of the body 11.

On both end surfaces of the pipe body 11 in the axial direction,
Each flange 17 is welded to the pipe body 11
Liquid-tight. An end of the axial reinforcing member 13 is fixed to the flange 17 by welding or screw fastening such as bolt fastening. Furthermore, this flange 1
Numeral 7 is welded to a pipe P as a connection partner to constitute a pipe structure 20 as illustrated in FIG. This piping structure 2
0 is used as a "crossover pipe" provided between buildings such as plant facilities.

In the pipe joint device 10A of this embodiment, the inner surface of the pipe body 11, that is, the surface in contact with the internal fluid,
Like a normal elbow, it has a smooth curved surface and does not have irregularities such as bellows. Therefore, the pressure fluctuation of the internal fluid is small, and there is no problem of deposition of impurities causing corrosion. When an internal pressure is applied to the pipe body 11, the circumferential reinforcing member 12 and the axial reinforcing member 13 cooperate to suppress excessive deformation of the pipe body 11.

For this reason, the pipe body 11 of this embodiment
Can be made thin enough to withstand the membrane force of a lattice structure or a mesh structure composed of the circumferential reinforcing member 12 and the axial reinforcing member 13. As a result, the rigidity of the pipe body 11 against bending and torsion is significantly smaller than that of a conventional pipe joint device using a pressure-resistant bending pipe having a normal thickness, and a flexible structure can be realized. The pipe body 11 made of such a thin metal pipe can absorb the relative displacement of the pipe at the time of the occurrence of the earthquake, and has a strength against the pressure of the internal fluid by the combination of the two types of reinforcing members 12 and 13. The structure can withstand enough.

FIGS. 4 and 5 show a pipe joint device 10B according to a second embodiment of the present invention. This piping joint device 1
0B is a filler 30 covering the entire outer periphery of the pipe body 11.
And a circumferential reinforcing member 31 and an axial reinforcing member 32 are embedded in the filler 30. As the filler 30,
For example, lead that also serves as a heat insulator may be used.

In the case of the pipe joint device 10B of this embodiment, annular circumferential reinforcing members 31 extending in the circumferential direction on the outer peripheral side of the pipe body 11 are arranged at a plurality of locations at intervals in the axial direction of the pipe body 11. Further, outside the circumferential reinforcing members 31, axial reinforcing members 32 along the axial direction of the pipe body 11 are arranged at a plurality of locations at intervals in the circumferential direction of the pipe body 11. Pipe body 1
A flange 17 is welded to each of the two ends, and an axial reinforcing member 32 is welded or screwed to the flange 17, and the flange 17 is welded to a pipe P to be connected.

The pipe joint device 10B of the second embodiment
When the pressure of the internal fluid is applied to the pipe body 11, the circumferential reinforcing members 31 embedded in the filler 30
And, the excessive deformation of the pipe body 11 is suppressed by the axial reinforcing member 32 on the outside thereof. Further, for the same reason as in the first embodiment, the wall thickness of the pipe body 11 can be reduced. Therefore, the rigidity of the pipe body 11 against bending and torsion can be reduced by using a pressure-resistant bending pipe having a normal thickness. It is significantly smaller than the conventional pipe joint device used. As a result, the pipe joint device 10 of this embodiment
B can also absorb the relative displacement of the pipe P during an earthquake,
In addition, a flexible structure is provided that can sufficiently withstand the pressure of the internal fluid in terms of strength.

The present invention employs a straight tubular pipe body 40 as in a pipe joint device 10C of a third embodiment shown in FIG. 6 to provide a pipe joint portion other than a bent portion, for example, a pipe joint portion shown in FIG. It is also possible to configure a pipe joint device 10C having a substantially straight shape as partially shown.

A circumferential reinforcing member 50 spirally wound on the outer peripheral surface of the pipe body 11 like a circumferential reinforcing member 50 used in the pipe joint device 10D of the fourth embodiment shown in FIG. May be used.

In these third and fourth embodiments, portions common to the first embodiment (FIGS. 1 to 3) or the second embodiment (FIGS. 4 to 5) are described below.
The same reference numerals are assigned to the first and second embodiments, and the description is omitted. Also in these third and fourth embodiments, the same effects as in the first and second embodiments can be obtained.

In short, the pipe body, the circumferential reinforcing member or the axial reinforcing member in the present invention can be variously modified and implemented according to the mode of the joint portion without departing from the gist of the present invention. Needless to say, specific aspects of each member constituting the invention are not limited to the above embodiments.

[0023]

According to the present invention, the relative displacement of the pipe caused by an earthquake or the like can be tolerated, and there is no unevenness such as a bellows on the inner surface of the joint portion. A joint device that is suppressed and has high strength against internal pressure can be obtained. When the annular circumferential reinforcing member is employed, the structure of the circumferential reinforcing member is simplified, and the mounting of the circumferential reinforcing member to the pipe body can be easily performed. Further, when a spiral-shaped circumferential reinforcing member is used, the number of components is small and the configuration is simple, and the circumferential reinforcing member can be attached according to the shape and dimensions of the pipe body. In the case where the reinforcing member is embedded in a filler, the strength against internal pressure can be further increased, and by using, for example, lead for the filler, the function as a heat insulator can also be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along an axial direction of a pipe joint device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view of a pipe structure showing an example of a use mode of the pipe joint device shown in FIG. 1;

FIG. 4 is a sectional view taken along an axial direction of a pipe joint device according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along the line VV in FIG. 4;

FIG. 6 is a sectional view taken along the axial direction of a pipe joint device according to a third embodiment of the present invention.

FIG. 7 is a sectional view taken along the axial direction of a pipe joint device according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing an example of a conventional pipe joint device.

FIG. 9 is a perspective view showing an example of a pipe structure using a conventional pipe joint device.

FIG. 10 is a sectional view of a bellows used in a conventional pipe joint device, taken along an axial direction.

[Explanation of symbols]

 10A, 10B, 10C, 10D: Pipe joint device 11: Pipe body 12: Circumferential reinforcing member 13: Axial reinforcing member 30: Filler 31: Circumferential reinforcing member 32: Axial reinforcing member 40: Pipe body 50: Perimeter Direction reinforcement member P… Piping

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H019 EA18 EA20 3H111 AA01 BA01 CB03 CB04 CC06 CC07 CC13 CC20 DA07 DB12 EA14 EA17

Claims (4)

[Claims] 1. A pipe body comprising a thin pipe connected to a pipe and having a smaller thickness than the pipe, a circumferential reinforcing member fixed to an outer peripheral side of the pipe body and extending in a circumferential direction of the pipe body, An axial reinforcing member provided on the outer peripheral side of the pipe body and extending in the axial direction of the pipe body. 2. The pipe joint device according to claim 1, wherein the circumferential reinforcing member is an annular reinforcing member provided at a plurality of locations at intervals in the axial direction of the pipe body. 3. The piping joint device according to claim 1, wherein the circumferential reinforcing member is a spiral reinforcing member spirally wound around the pipe body. 4. The pipe joint device according to claim 1, wherein the circumferential reinforcing member and the axial reinforcing member are embedded in a filler provided on an outer periphery of the pipe body.