JP6776095B2 - Expansion joint structure - Google Patents

Description

The present invention relates to a telescopic pipe joint structure having one pipe, the other pipe, and a joint sleeve connecting these one pipe and the other pipe, and in particular, equalizes the deviation of one pipe and the other pipe with respect to the joint sleeve. Regarding expansion pipe joint structures that can be adjusted to

Conventionally, a telescopic pipe joint structure having one pipe, the other pipe, and a joint sleeve connecting the one pipe and the other pipe has been known.

Further, one pipe and the joint sleeve and the other pipe and the joint sleeve are sealed by a seal rubber ring.

In such a telescopic pipe joint structure, various fluids are conveyed such as sending out drainage or the like.

By the way, the expansion joint structure having such a structure may shift due to aging due to the influence of an earthquake or the like.

When the expansion joint structure shifts, a shift occurs between one pipe and the other pipe. In this case, for example, if there is a large deviation between one pipe and the joint sleeve and there is almost no deviation between the other pipe and the joint sleeve, only the seal rubber ring between one pipe and the joint sleeve is used. It wears and wears out. In such a case, a technique has been developed to evenly adjust the deviation of one pipe and the other pipe with respect to the joint sleeve. However, when one pipe and the other pipe are displaced in the axial direction with respect to the joint sleeve, Alternatively, a technique has not been developed that appropriately copes with both deviations in the direction orthogonal to the axial direction (in the case of eccentricity).

Japanese Unexamined Patent Publication No. 3-285137 Japanese Unexamined Patent Publication No. 2005-91215 Japanese Unexamined Patent Publication No. 2004-53317 Japanese Unexamined Patent Publication No. 2004-10355

The present invention has been made in consideration of such a point, and provides a telescopic pipe joint structure capable of uniformly adjusting the axial and eccentric deviations of one pipe and the other pipe with respect to the joint sleeve. The purpose is.

The present invention is fitted into one pipe, the other pipe, a joint sleeve connected to the one pipe and the other pipe, and the joint sleeve, and a pair of rotations with respect to the joint sleeve. A rotating ring that rotates about a shaft, one operating rod that is connected between the rotating ring and the one pipe, and a rotating ring and the other pipe that are connected to each other. The other working rod is provided, and the one operating rod is connected to the rotating ring and the one pipe via a spherical bearing, and the other operating rod is connected to the rotating ring and the other pipe. , Each is a telescopic pipe joint structure connected via a spherical bearing.

In the present invention, the pair of rotating shafts are arranged to face each other on the rotating ring, and the connecting point of the one operating rod and the connecting point of the other operating rod are arranged to face each other. Rotating shaft, the connecting point of the one operating rod, the connecting point of the other rotating shaft and the other operating rod are arranged 90 ° apart on the rotating ring, a telescopic pipe joint structure. Is.

The present invention is a telescopic pipe joint structure in which at least one of the pipes and the joint sleeve is provided with a stopper mechanism for stopping the rotation of the joint sleeve with respect to the one pipe.

In the present invention, the stopper mechanism includes a rotation stopper plate provided on the one pipe and extending toward the joint sleeve side, and the rotation stopper plate engages with a seal rubber ring housing provided on the joint sleeve side. It is a telescopic pipe joint structure.

In the present invention, the housing for a seal rubber ring has a plurality of housing bodies and a plurality of tightening bolts for tightening the housing bodies to each other, and the rotary stopper plate engages with one tightening bolt. Is.

As described above, according to the present invention, the deviation in the axial direction and the eccentric direction with respect to the joint sleeve of one pipe and the other pipe can be uniformly adjusted.

FIG. 1 is a side sectional view showing a telescopic pipe joint structure according to the present invention. FIG. 2 is an arrow view showing the A line direction and the B line direction separately. FIG. 3 is an arrow view showing the C-line direction and the D-line direction of FIG. 1 separately. FIG. 4 is a side view showing the operation of the expansion joint structure. FIG. 5 is a plan view showing the operation of the expansion joint structure. FIG. 6 is a side sectional view showing the operation of the expansion joint structure. FIG. 7 is a plan view showing the operation of the expansion joint structure. FIG. 8 is a side sectional view showing the operation of the expansion joint structure. FIG. 9 is a plan view showing the operation of the expansion joint structure.

Hereinafter, embodiments of the expansion joint structure according to the present invention will be described with reference to the drawings.

Here, FIG. 1 is a side sectional view showing the expansion joint structure according to the present invention, FIG. 2 is an arrow view showing the A-line direction and the B-line direction of FIG. 1 separately, and FIG. 3 is the C-line direction and FIG. The arrow view showing the D line direction divided, FIG. 4 is a side view showing the action of the expansion joint structure, and FIG. 5 is a plan view showing the action of the expansion joint structure.

As shown in FIGS. 1 to 5, the expansion / contraction pipe joint structure 10 connects the first pipe (one pipe) 1, the second pipe 2 (the other pipe), and the first pipe 1 and the second pipe 2. In addition, the first pipe 1 and the second pipe 2 are provided with a joint sleeve 3 that can slide on the inner surface.

Further, both end portions 3a and 3b of the joint sleeve 3 are provided with housings 11 and 12 for sealing rubber rings that cover both end portions 3a and 3b of the joint sleeve 3. These seal rubber ring housings 11 and 12 are provided on the outer periphery of the first pipe 1 and the second pipe 2 along the circumferential direction. Further, in the housings 11 and 12 for the seal rubber rings, seal rubber rings 15 and 16 for sealing between both end portions 3a and 3b of the joint sleeve 3 and the first pipe 1 and the second pipe 2 are provided, respectively. There is.

It should be noted that the housings 11 and 12 for the seal rubber ring are fastened to fasten a plurality of housing bodies 11a and 12a separately installed around the first pipe 1 and the second pipe 2 and the plurality of housing bodies 11a and 12a. It has bolts 13 and 14.

Furthermore, a rotating ring (also referred to as a gimbal ring) 20 rotatably provided with respect to the joint sleeve 3 is fitted on the outer periphery of the substantially central portion of the joint sleeve 3 in the axial direction. The rotating ring 20 is attached to the joint sleeve 3 via a pair of rotating shafts 20a and 20b, and rotates around the pair of rotating shafts 20a and 20b.

Further, the first operating rod (one operating rod) 21 is connected between the rotating ring 20 and the first pipe 1, and the second operating rod (the other operating rod) is connected between the rotating ring 20 and the second pipe 2. Rods) 22 are connected.

That is, a first fixing ring structure 31 fixed to the first pipe 1 is attached to the outer circumference of the first pipe 1, and a second fixing ring structure fixed to the second pipe 2 is attached to the outer circumference of the second pipe 2. 32 is attached. Both the first fixing ring structure 31 and the second fixing ring structure 32 are fixed to the first pipe 1 and the second pipe 2 by bolting or welding.

One end of the first operating rod 21 is connected to the first fixed ring structure 31 by a spherical bearing 21a, and the other end of the first operating rod 21 is connected to the rotating ring 20 by a spherical bearing 21b.

Further, one end of the second operating rod 22 is connected to the second fixed ring structure 32 by a spherical bearing 22a, and the other end of the second operating rod 22 is connected to the rotating ring 20 by a spherical bearing 22b.

As described above, both one end and the other end of the first operating rod 21 are connected to the first fixing ring structure 31 of the first pipe 1 and the joint sleeve 3 via the spherical bearings 21a and 21b. When a deviation in the axial direction between the first pipe 1 and the joint sleeve 3 or a deviation in the direction orthogonal to the axial direction (eccentric direction) occurs, the 1 operating rod 21 takes its posture in response to these deviations. Can be changed appropriately.

Further, since one end and the other end of the second actuating rod 22 are both connected to the second fixing ring structure 32 of the second pipe 2 and the joint sleeve 3 via spherical bearings 22a and 22b, the second actuating rod 22 is actuated. When a deviation in the axial direction between the second pipe 2 and the joint sleeve 3 or a deviation in the direction orthogonal to the axial direction (eccentric direction) occurs, the rod 22 appropriately adjusts its posture in response to these deviations. Can be changed.

Furthermore, a rotation stop plate 40 extending in the axial direction toward the joint sleeve 3 side is attached to the first fixing ring structure 31 attached to the first pipe 1 by a mounting bolt 35. The rotation stop plate 40 extends from the first fixing ring structure 31 toward the joint sleeve 3. Further, a roller 13a is attached to a fastening bolt 13 of the housing 11 for a seal rubber ring that covers the end portion 3a of the joint sleeve 3, and the rotation stop plate 40 engages with the roller 13a.

Therefore, when the joint sleeve 3 tries to rotate with respect to the first pipe 1, the rotation stop plate 40 extending from the first fixing ring structure 31 is a fastening bolt of the sealing rubber ring housing 11 that covers the end portion 3a of the joint sleeve 3. Engage with the roller 13a attached to the 13. As a result, the relative rotational movement between the first pipe 1 and the joint sleeve 3 can be stopped.

As described above, the rotating ring 20 has a pair of rotating shafts 20a and 20b along the peripheral direction, a spherical bearing (connecting point) 21b on the first operating rod 21 side, and a spherical surface on the second operating rod 22 side. A bearing (connection point) 22b is provided. In this case, the pair of rotating shafts 20a and 20b provided on the rotating ring 20 are arranged so as to face each other (separated by 180 °), and the spherical bearing 21b and the second on the first operating rod 21 side. The spherical bearings 22b on the operating rod 22 side are also arranged with respect to each other (180 ° apart). Further, the rotating shaft 20a, the spherical bearing 22b, the rotating shaft 20b, and the spherical bearing 21b are arranged on the rotating ring 20 so as to be separated from each other by 90 ° in the circumferential direction.

Next, the operation of the present embodiment having such a configuration will be described with reference to FIGS. 1, 4 and 5.

First, the expansion pipe joint structure 10 described above is installed in a building structure. Such a telescopic pipe joint structure 10 also deviates in the axial direction or the direction orthogonal to the axial direction (eccentric direction) due to an earthquake or aging.

First, FIG. 1 shows a reference shape of the expansion joint structure 10. When the expansion joint structure 10 deviates from this reference shape along the axial direction, especially when the first pipe (one pipe) 1 and the second pipe (the other pipe) 2 are separated from each other. The amount of deviation in the axial direction is E (see FIGS. 4 and 5).

At this time, the first operating rod (one operating rod) 21 is pulled between the first fixed ring structure 31 of the first pipe 1 and the rotating ring 20, and the second operating rod (the other operating rod) 22 is also pulled. It is pulled between the second fixing ring structure 32 of the second pipe 2 and the rotating ring 20, and thus the rotating ring 20 rotates about the pair of rotating shafts 20a and 20b, and the joint sleeve 3 Take a tilted position with respect to.

In this case, the first actuating rod 21 and the second actuating rod 22 rotate in the spherical bearings 21a and 22b and the spherical bearings 22a and 22b, respectively, with the direction orthogonal to the paper surface of FIG. 4 as the rotation axis.

During this time, the rotating ring 20 is rotatably attached to the joint sleeve 3 via a pair of rotating shafts 20a and 20b, and the first fixing ring structure 31 is fixed to the first pipe 1 and is second. 2 The fixing ring structure 32 is fixed to the second pipe 2. Therefore, the amount of deviation between the first pipe 1 and the joint sleeve 3 in the axial direction is E / 2, and the amount of deviation between the second pipe 2 and the joint sleeve 3 in the axial direction is also E / 2. In this way, both the first pipe 1 and the second pipe 2 move (shift) by an equal distance E / 2 with respect to the joint sleeve 3, and the seal rubber ring 15 and the first pipe 1 on the first pipe 1 side. 2 The seal rubber ring 16 on the pipe 2 side both moves the outer peripheral surface of the first pipe 1 and the outer peripheral surface of the second pipe 2 by the same distance (E / 2). As a result, only one of the seal rubber ring 15 on the first pipe 1 side and the seal rubber ring 16 on the second pipe 2 side is excessively worn, and the replacement period is not shortened. As a result, the seal rubber ring 15 on the first pipe 1 side and the seal rubber ring 16 on the second pipe 2 side can be used in a well-balanced manner, and the replacement period of the seal rubber rings 15 and 16 can be extended.

In addition, in FIG. 1, FIG. 4, and FIG. 5, the reference length L of the expansion / contraction pipe joint structure 10 and the reference length La of the expansion / contraction pipe joint structure 10 up to the rotation ring 20 are shown.

During this time, the rotation stopper plate 40 attached to the first fixing ring structure 31 engages with the roller 13a attached to the fastening bolt 13 of the sealing rubber ring housing 11 for fixing the end portion 3a of the joint sleeve 3. The first pipe 1 side and the second pipe 2 are pipes that are incorporated in the building structure in advance and do not rotate with respect to the building structure. As described above, when the rotation stop plate 40 engages with the roller 13a attached to the fastening bolt 13 of the housing 11 for the seal rubber ring, the joint sleeve 3 becomes the second pipe 2 as well as the first pipe 1. On the other hand, it does not rotate.

Next, a case where the first pipe 1 and the second pipe 2 approach each other with a deviation amount S will be described with reference to FIGS. 6 and 7.

Here, FIG. 6 is a side sectional view showing the action of the expansion joint structure 10, and FIG. 7 is a plan view showing the action of the expansion joint structure 10.

At this time, the first operating rod (one operating rod) 21 is pressed between the first fixed ring structure 31 and the rotating ring 20 of the first pipe 1, and the second operating rod (the other operating rod) 22 is also pressed. Pressed between the second fixing ring structure 32 and the rotating ring 20 of the second pipe 2, the rotating ring 20 rotates about the pair of rotating shafts 20a and 20b in this way, and the joint sleeve 3 Take a tilted position with respect to.

In this case, the first operating rod 21 and the second operating rod 22 rotate in the spherical bearings 21a and 22b and the spherical bearings 22a and 22b, respectively, with the direction orthogonal to the paper surface of FIG. 6 as the rotation axis.

During this time, the rotating ring 20 is rotatably attached to the joint sleeve 3 via a pair of rotating shafts 20a and 20b, and the first fixing ring structure 31 is fixed to the first pipe 1. The second fixing ring structure 32 is fixed to the second pipe 2. Therefore, the amount of axial deviation between the first pipe 1 and the joint sleeve 3 is S / 2, and the amount of axial deviation between the second pipe 2 and the joint sleeve 3 is also S / 2. In this way, both the first pipe 1 and the second pipe 2 move (shift) by an equal distance S / 2 with respect to the joint sleeve 3, and the seal rubber ring 15 and the first pipe 1 on the first pipe 1 side. 2 The seal rubber ring 16 on the pipe 2 side both moves the outer peripheral surface of the first pipe 1 and the outer peripheral surface of the second pipe 2 by the same distance (S / 2). As a result, only one of the seal rubber ring 15 on the first pipe 1 side and the seal rubber ring 16 on the second pipe 2 side is excessively worn, and the replacement period is not shortened. As a result, the seal rubber ring 15 on the first pipe 1 side and the seal rubber ring 16 on the second pipe 2 side can be used in a well-balanced manner, and the seal rubber rings 15 and 16 are similarly worn and the degree of wear is also increased. Decrease. As a result, the replacement period of the seal rubber rings 15 and 16 can be extended.

In addition, in FIGS. 6 and 7, the reference length L of the expansion joint structure 10 and the reference length La of the expansion pipe joint structure 10 up to the rotation ring 20 are shown.

Next, a case where the first pipe 1 and the second pipe 2 are displaced in a direction orthogonal to the axial direction (eccentric direction) will be described.

First, as shown in FIG. 8, when the first pipe 1 and the second pipe are eccentric by the amount of eccentricity δ in the vertical direction, the first operating rod 21 rotates with respect to the first fixed ring structure 31 and the rotating ring 20. Move. At this time, the first operating rod 21 rotates on the spherical bearings 21a and 21b with the direction orthogonal to the paper surface of FIG. 8 as the rotation axis.

Similarly, the second operating rod 22 rotates on the spherical bearings 22a and 22b with the direction orthogonal to the paper surface of FIG. 8 as the rotation axis.

Further, the rotating ring 20 slightly rotates on the joint sleeve 3 via the pair of rotating shafts 20a and 20b.

Next, as shown in FIG. 9, when the first pipe 1 and the second pipe 2 are eccentric by the amount of eccentricity δ in the lateral direction, the first operating rod 21 is attached to the first fixed ring structure 31 and the rotating ring 20. It rotates against it. At this time, the first operating rod 21 rotates on the spherical bearings 21a and 21b with the direction orthogonal to the paper surface of FIG. 9 as the rotation axis.

Similarly, the second operating rod 22 rotates on the spherical bearings 22a and 22b with the direction orthogonal to the paper surface of FIG. 9 as the rotation axis.

Further, the rotating ring 20 slightly rotates on the joint sleeve 3 via the pair of rotating shafts 20a and 20b.

As described above, as shown in FIGS. 8 and 9, when the first pipe 1 and the second pipe 2 are eccentric in the vertical direction or in the horizontal direction, the first operating rod is in any case. The 21 and the second actuating rod 22 rotate about the spherical bearings 21a and 22b and the spherical bearings 22a and 22b provided at both ends of each other about a rotation axis orthogonal to the paper surface of FIG. 8 which is a side sectional view. It can be rotated around a rotation axis orthogonal to the paper surface of FIG. 9, which is a plan view.

In addition, in FIG. 8 and FIG. 9, the reference length L of the expansion joint structure 10 and the reference length La up to the rotation ring 20 of the expansion pipe joint structure 10 are shown.

As described above, according to the present embodiment, when a deviation in the axial direction occurs between the first pipe 1 and the second pipe 2, or a deviation in the direction orthogonal to the axial direction (eccentric direction) occurs. The first actuating rod 21 and the second actuating rod 22 can be reliably rotated in the spherical bearings 21a and 22b and the spherical bearings 22a and 22b, respectively, to change their postures orthogonally. Therefore, the deviation in the axial direction and the deviation in the eccentric direction can be appropriately absorbed.

Further, the first pipe 1 and the second pipe 2 are moved by the same distance with respect to the joint sleeve 3, and the seal rubber ring 15 on the first pipe 1 side and the seal rubber ring 16 on the second pipe 2 side are used in a well-balanced manner. It is possible to shift the conversion time of the seal rubber rings 15 and 16 as a whole.

1 1st pipe 2 2nd pipe 3 Joint sleeve 3a, 3b End 11 Seal rubber ring housing 11a Housing body 12 Seal rubber ring housing 12a Housing body 13 Fastening bolt 14 Fastening bolt 15 Seal rubber ring 16 Seal rubber ring 20 Rotating ring 21 No. 1 Actuating rod 21a, 22b Spherical bearing 22 Second actuating rod 22a, 22b Spherical bearing 31 First fixing ring structure 32 Second fixing ring structure 40 Rotation stop plate

Claims (4)

One pipe and
With the other pipe,
A joint sleeve connected to the one pipe and the other pipe,
A rotating ring that is fitted into the joint sleeve and rotates about a pair of rotating shafts with respect to the joint sleeve.
One operating rod connected between the rotating ring and the one pipe,
It is provided with the other working rod connected between the rotating ring and the other pipe.
The one operating rod is connected to the rotating ring and the one pipe via a spherical bearing, respectively.
The other operating rod is connected to the rotating ring and the other pipe via a spherical bearing, respectively .
A telescopic pipe joint structure in which, at least between the one pipe and the joint sleeve, a stopper mechanism for stopping the rotation of the joint sleeve with respect to the one pipe around the axis of the one pipe is provided . On the rotating ring, the pair of rotating shafts are arranged to face each other, and the connecting point of the one operating rod and the connecting point of the other operating rod are arranged to face each other.
One rotating shaft, the connecting point of the one operating rod, the other rotating shaft and the connecting point of the other operating rod are arranged on the rotating ring at intervals of 90 °.
The expansion joint structure according to claim 1. The stopper mechanism includes a detent plate extending joint sleeve side with provided on the one of the pipe, the rotation stopper plate engages the sealing rubber ring for housing provided on the side the joint sleeve, according to claim 1 or 2. The expansion pipe joint structure according to 2. The housing for a seal rubber ring has a plurality of housing bodies and a plurality of tightening bolts for tightening the housing bodies to each other.
The telescopic pipe joint structure according to claim 3 , wherein the rotary stopper plate engages with one tightening bolt.

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