JP6925607B2 - Expansion joint structure and expansion pipe joint - Google Patents

Description

The present invention relates to a telescopic pipe joint structure and a telescopic pipe joint which are installed between existing pipes and can surely adjust the deviation of the existing pipe in the axial direction.

Conventionally, a telescopic pipe joint structure that is arranged between existing pipes and joins the existing pipes has been known.

Such a telescopic pipe joint structure is installed between existing pipes, but does not move in the axial direction and the eccentric direction after being installed by adjusting the axial deviation and the eccentric deviation of the existing pipe. A structure is required.

However, conventionally, after installing the expansion joint structure between the existing pipes, the expansion joint structure may be displaced especially in the axial direction.

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 in particular, a telescopic pipe joint that can surely adjust the deviation in the axial direction that occurs in the existing pipe and does not move in the axial direction after installation. It is an object of the present invention to provide a structure and a telescopic pipe joint.

In the present invention, in a telescopic pipe joint, a first sleeve, a second sleeve having one end joined to one end of the first sleeve so as to be detachable, and a joint portion between the first sleeve and the second sleeve. A rubber ring for covering the rubber ring from the outer periphery, a housing for holding the rubber ring from the outer periphery, and a fixing bolt for fixing the housing to the first sleeve and the second sleeve, and between the housing and the first sleeve. , Or a telescopic pipe joint characterized in that a non-slip ring is interposed between the housing and the second sleeve.

In the present invention, each non-slip ring has a first ring on the housing side and a second ring that abuts on the inner surface of the first sleeve or the first ring provided on the second sleeve side. It is a telescopic pipe joint characterized in that a fine uneven shape is formed on the inner peripheral surface of the 1 ring and the outer peripheral surface of the second ring.

In the present invention, a first circumferential groove into which the first ring is fitted is formed on the inner peripheral surface of the housing, and a second circumferential groove into which the second ring is fitted on the first sleeve or the outer peripheral surface of the second sleeve. It is a telescopic pipe joint characterized by being formed.

In the present invention, a rubber that covers a first sleeve, a second sleeve in which one end is detachably joined to one end of the first sleeve, and a joint portion between the first sleeve and the second sleeve from the outer periphery. A ring, a housing that holds the rubber ring from the outer periphery, and a fixing bolt that fixes the housing to the first sleeve and the second sleeve are provided, and between the housing and the first sleeve, or with the housing. A telescopic pipe joint having a non-slip ring interposed between the second sleeve and a bendable joint connected to the telescopic pipe joint is provided, and the bendable joint is the first sleeve or the second sleeve. An additional sleeve rotatably connected to the other end of the sleeve via a hinge mechanism, an additional rubber ring covering the joint between the first sleeve or the second sleeve and the additional sleeve from the outer periphery, and the addition. It is a telescopic pipe joint structure characterized by having an additional housing for holding a rubber ring from the outer periphery.

As described above, according to the present invention, the deviation of the existing pipe in the axial direction can be surely adjusted, and the existing pipe does not move in the axial direction after installation.

FIG. 1 is a cross-sectional view seen from above showing a telescopic pipe joint structure at a reference position according to the present invention. FIG. 2 is a side sectional view showing the expansion joint structure at the reference position. FIG. 3 is a cross-sectional view showing a telescopic pipe joint structure in an extended position. FIG. 4 is a cross-sectional view showing a bent expansion joint structure. FIG. 5 is a plan view showing the expansion joint structure at the reference position. FIG. 6 is a side view showing the expansion joint structure at the reference position. FIG. 7 is a side view showing a telescopic pipe joint structure in an extended position. FIG. 8 is a side view showing a bent expansion joint structure. FIG. 9 is an exploded perspective view showing the housing and the non-slip ring. 10 (a) and 10 (b) are exploded perspective views showing the first sleeve, the second sleeve, and the non-slip ring.

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

The expansion joint structure 10A according to the present invention is installed between the existing pipes 7 and 8 and joins the existing pipes 7 and 8.

That is, the existing pipes 7 and 8 are deviated from the design values in the axial direction and the eccentric direction, and the deviating amounts in the axial direction and the eccentric direction of the existing pipes 7 and 8 are different for each site.

The expansion joint structure 10A according to the present embodiment is installed between the existing pipes 7 and 8 so as to absorb the deviation between the existing pipes 7 and 8 in the axial direction and the eccentric direction. The expansion joint structure 10A itself has a structure that does not change.

Such a telescopic pipe joint structure 10A includes a telescopic pipe joint 10 installed between the existing pipes 7 and 8, and a pair of bendable joints 20 and 30 connected to both sides of the telescopic pipe joint 10.

Of these, the expansion joint 10 will be described in detail below. As shown in FIGS. 1 to 4, the expansion joint 10 includes a first sleeve 1 and a second sleeve 2 that is detachably joined to the first sleeve 1. In this case, one end of the second sleeve 2 is joined to one end of the first sleeve 1.

Further, a rubber ring 11 that covers the joint portion from the outer circumference is provided at the joint portion between the first sleeve 1 and the second sleeve 2, and the rubber ring 11 is provided by a steel housing 12 provided on the outer circumference of the rubber ring 11. It is held.

The first sleeve 1 and the second sleeve 2 are arranged slightly apart from each other, and the first sleeve 1 and the second sleeve 2 can be separated from each other in the axial direction.

Further, as shown in FIGS. 9 and 10, the housing 12 is composed of two divided portions 12a and 12b, and each of the divided portions 12a and 12b has flanges 13a and 13b extending in the axial direction. Then, the fixing bolt 15 is attached to the flange 13a of the split portion 12a and the flange 13b of the split portion 12b, and the fixing bolt 15 is tightened. As a result, the divided portions 12a and 12b are pressed against each other, and the housing 12 is fixed to the outer periphery of the first sleeve 1 and the second sleeve 2.

Further, steel non-slip rings 17 and 18 are interposed between the housing 12 and the first sleeve 1 and between the housing 12 and the second sleeve 2, and the housing 12 is interposed through the non-slip rings 17 and 18. And the first sleeve 1 and the second sleeve 2 are prevented from shifting in the axial direction.

A non-slip ring 17 is interposed between the housing 12 and the first sleeve 1 and between the housing 12 and the second sleeve 2, for example, only between the housing 12 and the first sleeve 1. You may.

The non-slip rings 17 and 18 will be further described. As shown in FIGS. 9 and 10, the non-slip ring 17 has a first ring 17a on the housing 12 side and a second ring 17b on the first sleeve 1 side. In this case, a first circumferential groove 14 into which the first ring 17a is fitted is formed on the inner peripheral surface of the housing 12, and a second circumferential groove 1a into which the second ring 17b is fitted is formed on the outer peripheral surface of the first sleeve 1. ing. Then, the first ring 17a is fitted into the first circumferential groove 14 of the housing 12, and the second ring 17b is fitted into the second circumferential groove 1a of the first sleeve 1, so that the first ring 17a is fitted into the housing 12. It is fixed in the axial direction on the inner peripheral surface, and the second ring 17b is fixed in the axial direction on the outer peripheral surface of the first sleeve 1.

Further, fine uneven shapes are formed on the inner peripheral surface of the first ring 17a and the outer peripheral surface of the second ring 17b, respectively, so that the first ring 17a and the second ring 17b also have a structure that does not shift in the axial direction. There is. As such a fine concavo-convex shape, for example, a rough surface formed by a knurled fine concavo-convex shape defined in JIS B0951-1962, a concavo-convex shape by screwing, or an innumerable concavo-convex shape by blasting is used. be able to.

Similarly, the non-slip ring 18 has a first ring 18a on the housing 12 side and a second ring 18b on the second sleeve 2 side. In this case, a first circumferential groove 14 into which the first ring 18a is fitted is formed on the inner peripheral surface of the housing 12, and a second circumferential groove 2a into which the second ring 18b is fitted is formed on the outer peripheral surface of the second sleeve 2. ing. Then, the first ring 18a is fitted into the first circumferential groove 14 of the housing 12, and the second ring 18b is fitted into the second circumferential groove 2a of the second sleeve 2, so that the first ring 18a is fitted into the housing 12. It is fixed in the axial direction on the inner peripheral surface, and the second ring 18b is fixed in the axial direction on the outer peripheral surface of the second sleeve 2.

Further, the same fine uneven shape as described above is formed on the inner peripheral surface of the first ring 18a and the outer peripheral surface of the second ring 18b, respectively. Therefore, the first ring 18a and the second ring 18b are also axially oriented. It has a structure that does not shift.

Next, the pair of bendable joints 20 and 30 will be described. Of these, the bendable joint 20 has an additional sleeve 3 rotatably connected to the other end of the first sleeve 1 via a first hinge 25 and a second hinge 26, which will be described later.

Further, a seal sleeve 27 is provided which surrounds the joint portion 3A between the first sleeve 1 and the additional sleeve 3 from the outside in the radial direction, and is provided between the inner surface of the seal sleeve 27 and the outer surface of the first sleeve 1 and between the inner surface of the seal sleeve 27 and the additional sleeve. Sealing rubber rings 28 and 28 are interposed between the three outer surfaces, respectively.

Next, the first hinge 25 and the second hinge 26 will be described. As shown in FIGS. 1 to 8, the first hinge 25 has an end plate 25a fixed to the first sleeve 1 by welding and a cylindrical connecting portion 25b extending from the end plate 25a toward the second hinge 26. The connecting portion 25b is attached to the end plate 25a by a mounting bolt 25d.

Further, the connecting portion 25b is connected to the rotating body 23.

Further, the second hinge 26 has an end plate 26a fixed to the additional sleeve 3 by welding and a cylindrical connecting portion 26b extending from the end plate 26a to the first hinge 25 side, and the connecting portion 26b is attached to the end plate 26a. It is mounted by the mounting bolt 26d.

Further, the connecting portion 26b is connected to the rotating body 24.

A hinge mechanism is formed by the first hinge 25 and the second hinge 26 having such a structure, and the rotating body 23 of the first hinge 25 and the rotating body 24 of the second hinge 26 can be rotated by the hinge pin 22. It is connected.

Further, the bendable joint 30 has an additional sleeve 4 rotatably connected to the other end of the second sleeve 2 via a first hinge 35 and a second hinge 36, which will be described later.

Further, a seal sleeve 37 is provided which surrounds the joint portion 4A between the second sleeve 2 and the additional sleeve 4 from the outside in the radial direction, and is provided between the inner surface of the seal sleeve 37 and the outer surface of the second sleeve 2 and the inner surface of the seal sleeve 37 and the additional sleeve. Sealing rubber rings 38 and 38 are interposed between the four outer surfaces, respectively.

Next, the first hinge 35 and the second hinge 36 will be further described. The first hinge 35 has an end plate 35a fixed to the second sleeve 2 by welding and a cylindrical connecting portion 36b extending from the end plate 35a to the second hinge 36 side, and the connecting portion 36b is attached to the end plate 35a. It is mounted by a mounting bolt 35d.

Further, the connecting portion 35b is connected to the rotating body 33.

Further, the second hinge 36 has an end plate 36a fixed to the additional sleeve 4 by welding and a cylindrical connecting portion 36b extending from the end plate 36a to the first hinge 35 side, and the connecting portion 36b is attached to the end plate 36a. It is mounted by the mounting bolt 36d.

Further, the connecting portion 36b is connected to the rotating body 34.

A hinge mechanism is formed by the first hinge 35 and the second hinge 36 having such a structure, and the rotating body 33 of the first hinge 35 and the rotating body of the second hinge 36 are rotatably connected by the hinge pin 32. Has been done.

Further, the bendable joint 20 is provided with an adjusting bolt 21 extending between the connecting portion 25b of the first hinge 25 and the connecting portion 26b of the second hinge 26, and by tightening the adjusting bolt 21, the first hinge 25 The inclination angle of the second hinge 26 with respect to the relative can be determined.

Further, the bendable joint 30 is provided with an adjusting bolt 31 extending between the connecting portion 35b of the first hinge 35 and the connecting portion 36b of the second hinge 36, and by tightening the adjusting bolt 31, the first hinge 35 The inclination angle of the second hinge 36 with respect to the relative can be determined.

A rubber ring 51 is provided between the additional sleeve 3 and the existing pipe 7, and the rubber ring 51 is held by the divided housing 50. Further, the divided housing 50 is fixed by the fixing bolt 52. Further, a rubber ring 61 is provided between the additional sleeve 4 and the existing pipe 8, and the rubber ring 61 is held by the divided housing 60. Further, the divided housing 60 is fixed by a fixing bolt 62.

Next, the operation of the present embodiment having such a configuration will be described.

First, if the existing pipes 7 and 8 are installed as designed and there is no deviation in the axial direction and the eccentric direction between the existing pipes 7 and 8, the expansion joint having the expansion joint 10 and the pair of bendable joints 20 and 30. The structure 10A is installed in the existing pipes 7 and 8 in a reference state, and the existing pipes 7 and 8 are joined by the expansion joint structure 10A (see FIGS. 1, 2, 5 and 6).

Next, when the existing pipes 7 and 8 are displaced in the axial direction, the fixing bolt 15 of the expansion joint 10 is loosened, the first sleeve 1 and the second sleeve 2 are moved in the axial direction in the housing 12, and the first The sleeve 1 and the second sleeve 2 are set at predetermined positions along the axial direction.

Next, the fixing bolts 15 are tightened to fix the housing 12 to the outer circumferences of the first sleeve 1 and the second sleeve 2.

In this case, the space between the first sleeve 1 and the housing 12 is fixed in the axial direction by the non-slip ring 17, and the space between the second sleeve 2 and the housing 12 is fixed in the axial direction by the non-slip ring 18.

As a result, the first sleeve 1 and the second sleeve 2 can be firmly fixed along the axial direction (see FIGS. 3 and 7).

After expanding and contracting the expansion / contraction pipe joint 10 in the axial direction in this way, the expansion / contraction pipe joint structure 10A is installed between the existing pipes 7 and 8, and the expansion / contraction pipe joint structure 10A is joined to the existing pipes 7 and 8. As a result, the existing pipes 7 and 8 can be reliably joined by the expansion pipe joint structure 10A.

Further, after the expansion / contraction pipe joint structure 10A is installed between the existing pipes 7 and 8, the expansion / contraction pipe joint structure 10A does not expand or contract in the axial direction.

Next, when the existing pipes 7 and 8 are displaced in the eccentric direction, one or both of the pair of bendable joints 20 and 30 are bent to a desired angle (see FIGS. 4 and 8).

In this case, for example, the inclination angle of the bendable joint 20 can be determined by operating the adjusting bolt 21 of the bendable joint 20, and similarly, by operating the adjusting bolt 31 of the bendable joint 20, the bendable joint 20 can be operated. An inclination angle of 30 can be determined.

After bending the bendable joints 20 and 30 to a desired angle in this way, the expansion joint structure 10A is joined to the existing pipes 7 and 8. As a result, the existing pipes 7 and 8 can be reliably joined by the expansion pipe joint structure 10A.

After the expansion joint structure 10A is installed between the existing pipes 7 and 8 in this way, the bendable joints 20 and 30 of the expansion joint structure 10A do not bend.

1 1st sleeve 1a 2nd circumferential groove 2 2nd sleeve 2a 2nd circumferential groove 3 Additional sleeve 4 Additional sleeve 7 Existing pipe 8 Existing pipe 10 Telescopic pipe joint 10A Telescopic pipe joint structure 11 Rubber ring 12 Housing 14 1st circle Circumferential groove 15 Fixing bolt 17 Non-slip ring 17a 1st ring 17b 2nd ring 18 Non-slip ring 18a 1st ring 18b 2nd ring 20 Flexible joint 30 Flexible joint

Claims (4)

In expansion fittings
With the first sleeve
A second sleeve, one end of which is detachably joined to one end of the first sleeve,
A rubber ring that covers the joint between the first sleeve and the second sleeve from the outer circumference,
A housing that holds the rubber ring from the outer circumference and
A fixing bolt for fixing the housing to the first sleeve and the second sleeve is provided.
A non-slip ring is interposed between the housing and the first sleeve, or between the housing and the second sleeve .
Each non-slip ring is characterized by having a first ring on the housing side and a second ring provided on the first sleeve side or the second sleeve side and in contact with the inner peripheral surface of the first ring. Expansion joint. Expansion joints of claim 1, wherein the fine concavo-convex shape on the first ring inner peripheral surface and the second ring outer peripheral surface is formed. A first circumferential groove into which the first ring is fitted is formed on the inner peripheral surface of the housing, and a second circumferential groove into which the second ring is fitted is formed on the outer peripheral surface of the first sleeve or the outer peripheral surface of the second sleeve. The expansion joint according to claim 1 or 2 , wherein the expansion joint is made. The expansion joint according to any one of claims 1 to 3 and the expansion joint.
A bendable joint connected to the expansion joint is provided.
The bendable joint is
An additional sleeve rotatably connected to the first sleeve or the other end of the second sleeve via a hinge mechanism.
A telescopic pipe joint structure having an additional rubber ring that covers a joint portion between the first sleeve or the second sleeve and the additional sleeve from the outer circumference, and an additional housing that holds the additional rubber ring from the outer circumference. ..

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