JP2002147670A - Control mechanism of expansion pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control mechanism of an expansion pipe joint capable of effectively absorbing the excess displacement in the direction vertical to the pipe axial direction by a simple means. SOLUTION: In the piping formed by connecting pipes 2, 3 by a bellows-type expansion pipe joint 1 or the like in a state of absorbing the angular displacement in the pipe axial direction and the direction vertical to the pipe axial direction, a control mechanism 5 is formed by connecting tip parts of first and second L-shaped plates 6, 7 extended from both end sides of the expansion pipe joint 1 toward a central part of the expansion pipe joint 1, to left and right sides of the expansion pipe joint 1 by means of a slot 8 and a pin 9 relatively movably in the direction Y vertical to the pipe axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control mechanism for a bellows type expansion joint, and more particularly to a control mechanism for an expansion joint which can effectively absorb an excessive displacement in a direction perpendicular to a pipe axis. Related to the control mechanism.

[0002]

2. Description of the Related Art As a telescopic pipe joint used for piping of various plants, for example, a rod-type bellows type telescopic pipe joint as shown in FIGS. 10 and 11 is well known.

In this method, a pipe 100 and a pipe 101 are connected to a bellows 102.
In order to absorb the displacement in the pipe axis direction, the pipe axis direction, and the angle, and to restrict the compression / tensile force acting on the bellows 102 and maintain the thrust by the pipe internal pressure, a control mechanism is used as a control mechanism. , Each pipe 100 to which both ends of bellows 102 are joined
, 101, tie rods 103 are erected in the circumferential direction.

[0004]

However, as described above,
For rod-type bellows type expansion joints,
Spherical washer 104 is used for control mechanism such as rod 103
And gap C₁, C _TwoSet the displacement absorption described above
And the thrust is maintained, so that the pipe axis
If excessive displacement occurs in the
I cannot follow the large change in attitude of Erod 103
There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a control mechanism for an expansion joint which can effectively absorb an excessive displacement in a direction perpendicular to the pipe axis by simple means. .

[0006]

According to the present invention, there is provided a control mechanism for a telescopic joint according to the present invention, wherein the telescopic joint is used to displace pipes in a pipe axis direction, a pipe axis direction, and an angular displacement. In the pipes connected so as to be able to absorb the water, on the left and right sides of the expansion joint, the ends of the plates extending from both ends of the expansion joint toward the center of the expansion joint, respectively. Is provided with a control mechanism which is connected so as to be relatively movable in the direction perpendicular to the tube axis.

[0007] Further, the distal ends of the plates are connected to each other by pins via long holes extending in the direction perpendicular to the tube axis.

[0008] Further, a predetermined gap is set between the elongated hole and the pin in the pipe axis direction.

A collar is attached to the outer periphery of the pin.

[0010] Further, a predetermined gap is set between the distal ends of the plates in the axial direction of the pins.

[0011] The opening edge of the elongated hole may be subjected to rounding.

[0012] The distal ends of the plates may be connected by a slide rail structure extending in a direction perpendicular to the tube axis.

Further, the plate is formed integrally with the expansion joint.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a control mechanism for a telescopic joint according to the present invention will be described in detail using embodiments with reference to the drawings.

[First Embodiment] FIG. 1 shows a first embodiment of the present invention. FIG. 1 (a) is a side view, and FIG. ) Is a rear view, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is an explanatory view of a pin and a long hole.

As shown in the drawing, a pipe 2 and a pipe 3 are connected to each other by flange portions 1a, 3 by an expansion pipe joint (expansion joint) 1 made of a bellows type or corrugated metal pipe or the like.
The two 2a and 3a are connected by connecting them with a large number of bolts and nuts 4.

A control mechanism 5 is provided on both the left and right sides of the expansion joint 1 to restrict the compression / tensile force acting on the expansion joint 1 and to maintain the thrust by the pipe internal pressure. Has been reinforced.

The control mechanism 5 includes a flange 1 on the pipe 2 side.
The free ends of the first L-shaped plate 6 connected to the first L-shaped plate 6a and the second L-shaped plate 7 connected to the flange 1a of the tube 3 are connected by pins 9 through long holes 8 which are long in the vertical direction. Become combined.

In the illustrated example, the mounting plate portion 6b of the first L-shaped plate 6 and the mounting plate portion 7b of the second L-shaped plate 7 are connected by the plurality of bolts and nuts 4 to the flange portion on the pipe 2 side. 1a and the flange portion 1a on the tube 3 side are fastened together.

The elongated hole 8 is formed in a connecting plate portion 6a of the first L-shaped plate 6 parallel to the pipe axis (refer to the pipe axis direction X), and the opening edge thereof is R-processed (see the processing portion R). ), And the width dimension is set to be larger than the outer diameter of the pin 9 by the gap B.

The pin 9 is provided between the supporting plates 10a and 10b extending bifurcated at the tip of a connecting plate portion 7a of the second L-shaped plate 7 parallel to the pipe axis.
1 and through the retaining pin 12.

The supporting plates 10a and 10b and the connecting plate 6a of the first L-shaped plate 6 inserted therebetween.
The thickness of the connecting plate portion 6a or the connecting plate portion 7a is set so that the gaps A ₁ and A ₂ are formed in a state where the connecting plate portion 6a is located at the intermediate portion in the longitudinal direction of the pin 9. Is set.

With this configuration, the expansion joint 1
If an excessive displacement occurs in the pipe axis direction Y due to land subsidence or the like after the installation setting, the pin 9 in the pin connection portion of the control mechanism 5 moves vertically in the elongated hole 8 (the pipe axis direction Y). By sliding, the shear displacement (movement) is absorbed. That is, a predetermined absorption displacement L is arbitrarily set in advance between the slot 8 and the pin 9 (see FIG. 3).

On the other hand, with respect to displacements other than the direction Y perpendicular to the tube axis, three-dimensional displacements (the gaps A ₁ , A ₂ , the gap B and the processed portion R at the edge of the long hole opening) are provided. Movement)
Is absorbed up to a certain displacement.

As described above, in this embodiment, the two L-shaped plates 6 and 7 have a simple structure in which the pins are connected to each other, so that the compression / tensile force acting on the expansion joint 1 and the thrust holding due to the internal pressure of the pipe are reduced. Thus, the reinforcing function of the expansion joint 1 is achieved, and the excessive displacement in the pipe axis direction Y is absorbed.

In this embodiment, since the control mechanism 5 is assembled integrally with the expansion joint 1 without any connection with the pipes 2 and 3, the setting can be carried out in advance at the factory. In addition, the workability of mounting the expansion joint 1 is improved.

[Second Embodiment] FIG. 4 is a sectional view of a control mechanism according to a second embodiment of the present invention.

This is because of the expansion joint 1 in the first embodiment.
L-shaped plates 6 and 7 of each flange portion 1a of the control mechanism 5
Are integrated with each other. Specifically, the connecting plate portions 6a, 7a of the L-shaped plates 6, 7 and the mounting plate portions 6b,
7b and the mounting plate portions 6b, 7b are integrally formed with the flange portion 1a, and the connecting plate portions 6a, 7a and the mounting plate portions 6b, 7b are joined by welding or the like at the time of installation setting. This is an example. Other configurations are the same as in the first embodiment.

According to this, the same operation as that of the first embodiment is obtained.
In addition to the effect, as in the first embodiment, the L-shaped plate 6,
It is not necessary to fasten the mounting plate portions 6b, 7b 7 together with the flange portion 1a with a plurality of bolts and nuts 4, and the advantage that the workability of mounting the control mechanism 5 and the like is improved is obtained.

[Third Embodiment] FIG. 5 is a sectional view of a control mechanism according to a third embodiment of the present invention.

This is because of the expansion joint 1 in the second embodiment.
In this example, a female screw 13 is formed in each of the flange portions 1a, and bolts 4A are screwed into the female screws 13 from outside the flange portions 2a, 3a of the pipes 2, 3, so that the telescopic joint 1 is attached. Other configurations are the same as those of the second embodiment.

According to this, the same operation as that of the second embodiment is obtained.
In addition to the effect, since there is no need to attach the pipes 2 and 3 from the inside of the flange portions 2a and 3a, there is obtained an advantage that the workability of attaching the expansion joint 1 and the like is further improved.

Fourth Embodiment FIG. 6 is a sectional view of a control mechanism according to a fourth embodiment of the present invention, and FIG. 7 is an explanatory view of a pin and a long hole.

This is an example in which a collar 14 is attached to the outer periphery of the pin 9 of the control mechanism 5 in the first embodiment, and the outer peripheral surface of the collar 14 is brought into surface contact with the opening edge of the elongated hole 8. Other configurations are the same as in the first embodiment.

According to this, the same operation as that of the first embodiment is obtained.
In addition to the effect, there is obtained an advantage that the strength of the pin connection portion can be improved.

[Fifth Embodiment] FIG. 8 shows a fifth embodiment of the present invention, and is a side view of a pipe employing a control mechanism of the present expansion joint, and FIG. 9 is a sectional view taken along the line IX-IX of FIG. It is.

This is because, in the control mechanism 5 in the first embodiment, a slide rail connection is adopted instead of the pin connection, and the connecting plate portion 6a of the first L-shaped plate 6 and the connecting plate portion 7a of the second L-shaped plate 7 are connected. connected by a Yes Yes and 15a groove 15b, and slidable with each other in the vertical direction (tube axis direction perpendicular Y), abolished the gap a _1, a ₂ and the gap B (see FIG. 2) in the first embodiment It is an example. Other configurations are the same as in the first embodiment. The dovetail groove 15b has a dovetail 1
After assembling 5a, it is preferable that both ends are closed to prevent falling off. In the illustrated example, the groove 15b is formed on the side of the connecting plate portion 7a while the groove 15b is formed on the side of the connecting plate portion 7a, but may be reversed.

According to this, unlike the first embodiment, only when an excessive displacement occurs in the pipe axis perpendicular direction Y due to land subsidence or the like, the connecting portion between the dovetail 15a of the control mechanism 5 and the dovetail groove 15b is The relative displacement of the first and second L-shaped plates 6 and 7 in the vertical direction (the direction Y perpendicular to the tube axis) absorbs the shearing displacement (movement).

In the first embodiment, the same operation and effect as those of this embodiment can be obtained by eliminating the gap B, but the structure of this embodiment not using the pins 9 and the like is simpler. There are advantages.

The present invention is not limited to the above embodiments,
It goes without saying that various changes such as a structure (groove shape and the like) of the slide rail connection in the control mechanism can be made without departing from the gist of the present invention.

[0041]

As described above in detail based on the embodiment, the invention according to claim 1 of the present invention uses an expansion joint to connect pipes in a pipe axis direction, a pipe axis direction, and an angle. In a pipe connected so as to absorb displacement, a tip end portion of a plate extending to the left and right sides of the expansion joint from both ends of the expansion joint toward the center of the expansion joint. A control mechanism that connects the competitors so that they can move relative to each other in the direction perpendicular to the pipe axis is provided. If an excessive displacement occurs in the direction perpendicular to the pipe axis (vertical direction) due to land subsidence, etc. The shear movement is effectively absorbed by the sufficient absorption displacement amount set in advance.

The invention according to claim 2 of the present invention is characterized in that the end portions of the plates are pin-connected via a long hole extending in the direction perpendicular to the tube axis. In addition to the functions and effects, there is an advantage that the distal ends of the plates can smoothly move relative to each other in the direction perpendicular to the tube axis with a simple structure.

The invention according to claim 3 of the present invention is characterized in that a predetermined gap is set in the pipe axis direction between the elongated hole and the pin, and the operation and effect of the invention according to claim 1 are provided. In addition to this, there is an advantage that the movement of the expansion joint in the pipe axis direction can be restricted by a predetermined absorption displacement amount.

The invention according to claim 4 of the present invention is characterized in that a collar is attached to the outer periphery of the pin, so that in addition to the function and effect of the invention according to claim 1, the strength of the pin joint is improved. There is an advantage that can be achieved.

The invention according to claim 5 of the present invention is characterized in that a predetermined gap is set in the axial direction of the pin between the distal ends of the plates. In addition to the effect, there is an advantage that the movement of the expansion joint in the direction perpendicular to the pipe axis (left-right direction) can be regulated with a predetermined absorption displacement amount.

The invention according to claim 6 of the present invention is characterized in that the opening edge of the long hole is subjected to a rounding process,
In addition to the functions and effects of the invention according to claim 1, there is an advantage that the angular displacement (inclination) of the expansion joint can be absorbed.

The invention according to claim 7 of the present invention is characterized in that the distal ends of the plates are connected by a slide rail structure extending in the direction perpendicular to the tube axis. In addition to the effect, there is an advantage that the structure of the control mechanism can be further simplified.

The invention according to claim 8 of the present invention is characterized in that the plate is formed integrally with the expansion joint, so that in addition to the operation and effect of the invention according to claim 1, a control mechanism is provided. Can be set at the factory in advance, and there is an advantage that the setting is easy and the mounting workability is improved.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a piping adopting a control mechanism of the present expansion joint, showing a first embodiment of the present invention.
FIG. 2B is a rear view.

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

FIG. 3 is an explanatory view of a pin and a long hole.

FIG. 4 is a cross-sectional view of a control mechanism according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a control mechanism section according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a control mechanism according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory view of a pin and a long hole.

FIG. 8 is a side view of a pipe adopting a control mechanism of the present expansion joint, showing a fifth embodiment of the present invention.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 8;

FIG. 10 is a front view of a control mechanism of a conventional expansion joint.

FIG. 11 is an enlarged sectional view of a main part of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Expansion joint (expansion joint) 1a flange part 2 pipe 2a flange part 3 pipe 3a flange part 4 bolt-nut 4A bolt 5 control mechanism 6 first L-shaped plate 6a connecting plate part 6b mounting plate part 7 second L shaped plate 7a connecting plate 7b mounting plate portion 8 slot 9-pin 10a has support plate 10b supporting plate 11 washer 12 fixing pin 13 internal thread 14 color 15a 15b dovetail A _1, A ₂ clearance B clearance L absorbs the displacement X tube Axial direction Y Direction of tube axis

Claims (8)

[Claims] Claims: 1. Using a telescopic pipe joint to connect pipes in the pipe axial direction,
In a pipe connected so as to be able to absorb a displacement in a direction perpendicular to the pipe axis and at an angle, the pipe extends to the left and right sides of the telescopic joint from both ends of the telescopic joint toward the center of the telescopic joint. A control mechanism for a telescopic joint, wherein a control mechanism is provided which connects the leading ends of the ejected plates so as to be relatively movable in a direction perpendicular to the pipe axis. 2. A control mechanism for an expansion joint according to claim 1, wherein the distal ends of said plates are pin-connected via long holes extending in a direction perpendicular to the pipe axis. 3. A control mechanism for an expansion joint according to claim 2, wherein a predetermined gap is set between said elongated hole and a pin in a pipe axis direction. 4. A control mechanism for a telescopic joint according to claim 3, wherein a collar is attached to an outer periphery of said pin. 5. The control mechanism for an expansion joint according to claim 2, wherein a predetermined gap is set between the distal ends of the plates in the axial direction of the pin. 6. The control mechanism for a telescopic joint according to claim 2, wherein a rounding process is performed on an opening edge of the elongated hole. 7. The control mechanism according to claim 1, wherein the distal ends of the plates are connected by a slide rail structure extending in a direction perpendicular to the pipe axis. 8. The method according to claim 1, wherein the plate is formed integrally with the expansion joint.
The control mechanism for an expansion joint according to 6 or 7.