JP2018071743A - Flexible pipe joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evenly adjust deviation in an axial direction and an eccentric direction, for a joint sleeve of one pipe and the other pipe.SOLUTION: A flexible pipe joint structure 10 includes one pipe 1, the other pipe 2 and a joint sleeve 3. Into the joint sleeve 3, a rotation ring 20 is fitted, between the rotation ring 20 and the one pipe 1, a first operation rod 21 is connected, and between the rotation ring 20 and the other pipe 2, a second operation rod 22 is connected. Both end parts of the first operation rod 21 are connected to the one pipe 1 and the rotation ring 20 through spherical bearings 21a, 21b, and both end parts of the second operation rod 22 are connected to the other pipe 2 and the rotation ring 20 through spherical bearings 22a, 22b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an expansion joint structure having one pipe, the other pipe, and a joint sleeve connecting the one pipe and the other pipe, and in particular, the displacement of the one pipe and the other pipe with respect to the joint sleeve is even. The present invention relates to an expansion pipe joint structure that can be adjusted to

  2. Description of the Related Art Conventionally, there has been known an expansion joint structure having one pipe, the other pipe, and a joint sleeve connecting the one pipe and the other pipe.

  Further, a seal rubber ring seals between one pipe and the joint sleeve and between the other pipe and the joint sleeve.

  In such an expansion joint structure, various fluids are transported such as to discharge waste water.

  By the way, the expansion joint structure which consists of such a structure may shift | deviate by secular change by the influence of an earthquake etc.

  When the expansion joint structure is displaced, a shift occurs between one pipe and the other pipe. In this case, for example, when there is a large deviation between one pipe and the joint sleeve and almost no deviation occurs between the other pipe and the joint sleeve, only the seal rubber ring between one pipe and the joint sleeve is present. Wear and wear out. In such a case, a technique for evenly adjusting the displacement of one pipe and the other pipe with respect to the joint sleeve has been developed, but when one pipe and the other pipe are displaced in the axial direction with respect to the joint sleeve, Or the technique which respond | corresponds appropriately with respect to both shift | offset | difference when it shifts | deviates to the direction orthogonal to an axial direction (when decentering) is not developed.

JP-A-3-285137 JP 2005-91215 A JP 2004-53317 A JP 2004-10355 A

  The present invention has been made in consideration of such points, and provides an expansion pipe joint structure capable of uniformly adjusting the deviation in the axial direction and the eccentric direction with respect to the joint sleeve of one pipe and the other pipe. For the purpose.

  The present invention includes one pipe, the other pipe, a joint sleeve connected to the one pipe and the other pipe, and fitted into the joint sleeve. A rotating ring that rotates about an axis, one operating rod connected between the rotating ring and the one pipe, and connected between the rotating ring and the other pipe. The other working 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. These are expansion joint structures that are connected via spherical bearings.

  In the present invention, 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. The pivot shaft, the connecting point of the one actuating rod, the other pivot shaft and the connecting point of the other actuating rod are arranged 90 ° apart from each other on the rotating ring. It is.

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

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

  The present invention provides an expansion joint structure in which the seal rubber ring housing has a plurality of housing bodies and a plurality of fastening bolts for fastening the housing bodies to each other, and the rotation stop plate engages with one fastening bolt. It is.

  As described above, according to the present invention, it is possible to uniformly adjust the deviation in the axial direction and the eccentric direction with respect to the joint sleeve of one pipe and the other pipe.

FIG. 1 is a side sectional view showing an expansion joint structure according to the present invention. FIG. 2 is an arrow view showing the direction of the lines A and B in FIG. 3 is an arrow view showing the C-line direction and the D-line direction of FIG. 1 in a divided manner. 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.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an expansion pipe 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 B-line direction of FIG. 1 divided, and FIG. 3 is the C-line direction of FIG. FIG. 4 is a side view showing the operation of the expansion joint structure, and FIG. 5 is a plan view showing the operation of the expansion joint structure.

  As shown in FIGS. 1 to 5, the expansion joint structure 10 connects a first pipe (one pipe) 1, a 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 include a joint sleeve 3 that can slide on the inner surface.

  Seal rubber ring housings 11 and 12 are provided at both end portions 3 a and 3 b of the joint sleeve 3 to cover both end portions 3 a and 3 b of the joint sleeve 3. These seal rubber ring housings 11 and 12 are provided along the circumferential direction on the outer circumferences of the first pipe 1 and the second pipe 2. Also, in these seal rubber ring housings 11 and 12, seal rubber rings 15 and 16 are provided for sealing between the both end portions 3a and 3b of the joint sleeve 3, and the first pipe 1 and the second pipe 2, respectively. Yes.

  The seal rubber ring housings 11 and 12 are fastened by fastening a plurality of housing main bodies 11a and 12a separately installed around the first pipe 1 and the second pipe 2 and the plurality of housing main bodies 11a and 12a. Bolts 13 and 14 are provided.

  Furthermore, a rotation ring (also referred to as a gimbal ring) 20 provided so as to be rotatable with respect to the joint sleeve 3 is fitted on the outer periphery of the substantially central portion in the axial direction of the joint sleeve 3. 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, a first operating rod (one operating rod) 21 is connected between the rotating ring 20 and the first pipe 1, and a second operating rod (the other operating rod) is connected between the rotating ring 20 and the second pipe 2. Rod) 22 is connected.

  That is, a first fixed ring structure 31 fixed to the first pipe 1 is attached to the outer periphery of the first pipe 1, and a second fixed ring structure fixed to the second pipe 2 is attached to the outer periphery of the second pipe 2. 32 is attached. The first fixing ring structure 31 and the second fixing ring structure 32 are both 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.

  Furthermore, 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, since one end and the other end of the first operating rod 21 are both 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, 1 When the displacement of the operation rod 21 in the axial direction between the first pipe 1 and the joint sleeve 3 or the displacement in the direction perpendicular to the axial direction (eccentric direction) occurs, the position of the operation rod 21 corresponds to these displacements. It can be changed appropriately.

  Further, since one end and the other end of the second operating rod 22 are both connected to the second fixing ring structure 32 of the second pipe 2 and the joint sleeve 3 via the spherical bearings 22a and 22b, If the rod 22 is displaced in the axial direction between the second pipe 2 and the joint sleeve 3 or is displaced in a direction perpendicular to the axial direction (eccentric direction), the rod 22 is appropriately positioned in response to these displacements. Can be changed.

  Furthermore, a rotation stop plate 40 extending in the axial direction toward the joint sleeve 3 is attached to the first fixed ring structure 31 attached to the first pipe 1 by means of attachment bolts 35. The rotation stop plate 40 extends from the first fixed ring structure 31 to the joint sleeve 3 side. A roller 13a is attached to the fastening bolt 13 of the seal rubber ring housing 11 covering the end 3a of the joint sleeve 3, and the rotation stop plate 40 engages with the roller 13a.

  Therefore, when the joint sleeve 3 is about to rotate with respect to the first pipe 1, the rotation stop plate 40 extending from the first fixed ring structure 31 is a fastening bolt of the seal rubber ring housing 11 that covers the end portion 3 a of the joint sleeve 3. 13 is engaged with a roller 13 a attached to the roller 13 a. 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, a spherical bearing (connection point) 21b on the first operating rod 21 side, and a spherical surface on the second operating rod 22 side along the peripheral direction. 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 to face each other (separated by 180 °), and the spherical bearing 21b and the second bearing 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 (separated by 180 °). 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.

  First, the expansion pipe joint structure 10 described above is installed in a building structure. Such an expansion joint structure 10 also shifts in the axial direction or the direction (eccentric direction) perpendicular to the axial direction due to an earthquake or secular change.

  First, FIG. 1 shows a reference shape of the expansion joint structure 10. When the expansion joint structure 10 deviates along the axial direction from the state of this reference shape, 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. Pulled between the second fixed ring structure 32 of the second pipe 2 and the rotating ring 20, the rotating ring 20 rotates about the pair of rotating shafts 20a, 20b in this way, and the joint sleeve 3 Take a position tilted with respect to.

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

  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 fixed ring structure 31 is fixed to the first pipe 1, The two fixed ring structure 32 is fixed to the second pipe 2. For this reason, the amount of deviation in the axial direction between the first pipe 1 and the joint sleeve 3 is E / 2, and the amount of deviation in the axial direction between the second pipe 2 and the joint sleeve 3 is also E / 2. Thus, both the first pipe 1 and the second pipe 2 move (displace) by an equal distance E / 2 with respect to the joint sleeve 3, and the seal rubber ring 15 on the first pipe 1 side and the second pipe 2 are moved. The seal rubber ring 16 on the two pipe 2 side moves on the outer peripheral surface of the first pipe 1 and the outer peripheral surface of the second pipe 2 by an equal 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 not excessively worn, and the replacement time is not shortened. Accordingly, 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 balanced manner, and the replacement time of the seal rubber rings 15 and 16 can be extended.

  1, 4, and 5, the reference length L of the expansion joint structure 10 and the reference length La to the rotation ring 20 of the expansion joint structure 10 are shown.

  During this time, the rotation stop plate 40 attached to the first fixing ring structure 31 engages with the roller 13a attached to the fastening bolt 13 of the seal rubber ring housing 11 that fixes the end 3a of the joint sleeve 3. The 1st piping 1 side and the 2nd piping 2 are piping previously integrated in the building structure, Comprising: It does not rotate with respect to a building structure. As described above, when the rotation stop plate 40 is engaged with the roller 13 a attached to the fastening bolt 13 of the seal rubber ring housing 11, the joint sleeve 3 becomes the second pipe 2 as well as the first pipe 1. It does not rotate with respect to it.

  Next, the case where the 1st piping 1 and the 2nd piping 2 approach mutually with the deviation | shift amount S is demonstrated with reference to FIG. 6 and FIG.

  Here, FIG. 6 is a side sectional view showing the operation of the expansion joint structure 10, and FIG. 7 is a plan view showing the operation 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 of the first pipe 1 and the rotating ring 20, and the second operating rod (the other operating rod) 22 is also the same. Pressed between the second fixed 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 20 a and 20 b, and the joint sleeve 3. Take a position tilted with respect to.

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

  During this time, the rotation ring 20 is rotatably attached to the joint sleeve 3 via a pair of rotation shafts 20a and 20b, and the first fixed ring structure 31 is fixed to the first pipe 1. The second fixed ring structure 32 is fixed to the second pipe 2. Therefore, the amount of axial displacement between the first pipe 1 and the joint sleeve 3 is S / 2, and the amount of axial displacement between the second pipe 2 and the joint sleeve 3 is also S / 2. As described above, both the first pipe 1 and the second pipe 2 move (displace) by an equal distance S / 2 with respect to the joint sleeve 3, and the seal rubber ring 15 on the first pipe 1 side and the second pipe 2 are moved. The seal rubber ring 16 on the two pipe 2 side moves on the outer peripheral surface of the first pipe 1 and the outer peripheral surface of the second pipe 2 by an equal 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 not excessively worn, and the replacement time is not shortened. Accordingly, 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 high. Decrease. As a result, the replacement time of the seal rubber rings 15 and 16 can be extended.

  6 and 7, the reference length L of the expansion tube joint structure 10 and the reference length La to the rotating ring 20 of the expansion tube joint structure 10 are shown.

  Next, the case where the 1st piping 1 and the 2nd piping 2 shift | deviate to the direction (eccentric direction) orthogonal to an axial direction is demonstrated.

  First, as shown in FIG. 8, when the first pipe 1 and the second pipe are eccentric in the longitudinal direction by an eccentric amount δ, 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 in the spherical bearings 21a and 21b with the direction orthogonal to the paper surface of FIG.

  Similarly, the second actuating rod 22 rotates in the spherical bearings 22a and 22b with the direction orthogonal to the paper surface of FIG.

  The rotating ring 20 is slightly rotated on the joint sleeve 3 via a 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 in the lateral direction by an eccentric amount δ, the first operating rod 21 is connected to the first fixed ring structure 31 and the rotating ring 20. It rotates with respect to it. At this time, the first operating rod 21 rotates in the spherical bearings 21a and 21b with the direction orthogonal to the paper surface of FIG. 9 as the rotation axis.

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

  The rotating ring 20 is slightly rotated on the joint sleeve 3 via a pair of rotating shafts 20a and 20b.

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

  8 and 9, the reference length L of the expansion joint structure 10 and the reference length La to the rotating ring 20 of the expansion joint structure 10 are shown.

  As described above, according to the present embodiment, when an axial shift occurs between the first pipe 1 and the second pipe 2, or a shift perpendicular to the axial direction (eccentric direction) occurs, The first actuating rod 21 and the second actuating rod 22 can reliably rotate and change their postures at right angles in the spherical bearings 21a, 22b and the spherical bearings 22a, 22b. For this reason, the shift | offset | difference of an axial direction and the shift | offset | difference of an eccentric direction can be absorbed appropriately.

  Further, the first pipe 1 and the second pipe 2 are moved by an equal 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 balanced manner. The conversion time of the seal rubber rings 15 and 16 as a whole can be shifted.

DESCRIPTION OF SYMBOLS 1 1st piping 2 2nd piping 3 Joint sleeve 3a, 3b End 11 Seal rubber ring housing 11a Housing main body 12 Seal rubber ring housing 12a Housing main body 13 Fastening bolt 14 Fastening bolt 15 Sealing rubber ring 16 Sealing rubber ring 20 Rotating ring 21 First 1 Actuating rod 21a, 22b Spherical bearing 22 2nd operating rod 22a, 22b Spherical bearing 31 First fixed ring structure 32 Second fixed ring structure 40 Rotation stop plate

Claims (5)

One pipe,
The other pipe,
A coupling sleeve connected to the one pipe and the other pipe;
A rotation ring that is fitted into the joint sleeve and rotates about a pair of rotation axes with respect to the joint sleeve;
One actuating rod connected between the rotating ring and the one pipe;
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 through spherical bearings, respectively.
The other operating rod is connected to the rotating ring and the other pipe via a spherical bearing, respectively, in an expansion joint structure. On the rotation ring, the pair of rotation shafts are arranged to face each other, and the connection point of the one operation rod and the connection point of the other operation 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 90 ° apart from each other on the rotating ring.
The expansion joint structure according to claim 1.   The expansion pipe joint structure according to claim 1 or 2, wherein a stopper mechanism for stopping rotation of the joint sleeve with respect to the one pipe is provided between at least the one pipe and the joint sleeve.   The stopper mechanism includes a rotation stopper plate provided on the one pipe and extending toward a joint sleeve, and the rotation stopper plate engages with a seal rubber ring housing provided on the joint sleeve side. Expansion pipe joint structure. The seal rubber ring housing has a plurality of housing bodies and a plurality of fastening bolts for fastening the housing bodies to each other.
The expansion joint structure according to claim 4, wherein the rotation stop plate is engaged with one tightening bolt.

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