JP2652336B2 - Water leakage repair telescopic flexible joint for pipeline - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage for a pipeline which is disposed so as to cover a known joint for connecting ends of water pipes or the like disposed on a water bridge or the like, and repairs water leakage from the joint. The present invention relates to a repairable expansion joint.

[0002]

2. Description of the Related Art In aqueducts or the like provided exclusively for laying large-diameter pipes over rivers and the like, as shown in FIG. In order to connect the water pipes, a joint b fitted to the outside of the end of the water pipe or the like is installed on each bridge girder such as a water bridge. The joint b is configured such that the pipes a and a 'can slide inside thereof, and the pipes a and a' expand and contract within the joint b due to seasonal temperature changes and pressure fluctuations. be able to.

[0003] However, as long as the pipes a and a 'connected by the joint b are uniformly expanded and contracted in the joint b, no particular problem occurs. However, only one pipe (for example, a) is biased for some reason. If a large telescopic movement is caused, the end of the tube escapes from the joint b, which may cause water leakage. Therefore, as a countermeasure against water leakage due to the removal of the pipe a from the joint b, a steel outer cylinder c disposed outside the joint b and a holding ring d fitted to the pipes a and a 'are provided. A repairable expansion joint e is used. The outer cylinder c and the retainer are held together by bolts h penetrating through a plurality of bolt holes formed in the flange f provided at both ends of the outer cylinder c of the water leakage repairable flexible joint e and the flange g provided in the retainer ring d. d are fixed to each other, and a seal ring i is provided between the outer cylinder c and the pipes a and a '.

[0004]

By providing the water leakage repairable flexible joint e, even if the pipe a or a 'is removed from the joint b, water leakage to the outside can be prevented for the time being. However, even with this joint e, the pipes a and a 'have a structure in which the pipes a and a' extend and contract inside and out.
In addition, there is a risk of escape from the water leakage repair expansion / contraction flexible joint e, and complete prevention of water leakage cannot be expected. In addition, the expansion / contraction flexible joint e for water leakage repair allows the pipes a and a 'to expand and contract in the axial direction, but the pipes a and a'
If a 'is tilted, it cannot follow this, and in this case, there is a risk of breakage of the joint and leakage of water.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional water leakage repair expansion / contraction flexible joint for pipelines,
There is no risk of water leakage due to de-piping even when one of the pipes moves significantly, and a new pipe line that can be deformed following the tilting of the pipe, and does not cause breakage and water leakage The present invention aims to provide a water leakage repair expansion / contraction flexible joint.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a water leakage repairing telescopic flexible joint which is fitted to a portion of each pipe adjacent to a joint connecting end portions of adjacent pipes. A pair of outer tube members each having an annular end portion and an annular enlarged portion extending from the annular end portion to above the joint, and extendable and contractible between the annular enlarged portions of the pair of outer tube members. A flexible member made of rubber, synthetic resin, or the like, fixing means for fixing each annular end of the outer tube member to each tube, and a space between each annular end of the outer tube member and each tube surface. And a provided sealing member.

[0007]

The annular end portions of the pair of outer tube members are fixed to the respective tubes by fixing means, and the flexible member is stretchably stretched between the annular enlarged portions of the outer tube members. The joint can also expand and contract following the expansion and contraction of the pipe, so that the pipe does not escape from the joint even if the pipe moves significantly. Further, even when the pipe is inclined, the joint can be deformed following the inclination, so that the joint is not likely to be broken.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show one embodiment of a water leakage repairing expansion / contraction flexible joint for a pipeline according to the present invention. FIG. 1 is a front view showing an upper half section in cross section and a lower half section showing appearance. 2 is a side view showing a half of the side surface, and FIG. 3 is a view taken along the line AA in FIG.

The flexible joint 1 has an annular end fitted to a portion 2a, 2a 'of a pipe adjacent to a known joint 3 for connecting the ends of pipes 2, 2' laid on an aqueduct or the like. A pair of outer tubes each comprising an outer tube 4, 4 'and an annular enlarged portion 5, 5' which rises from these annular ends 4, 4 'and extends at a distance from the joint 3 and extends near the center thereof. Member 6,
6 '. A rubber-made annular flexible member 7 containing a reinforcing cord is straddled between the annular enlarged-diameter portions 5 and 5 'of the pair of outer tube members 6 and 6' such that the central portion thereof bulges upward. And both ends thereof are annular holding plates 8 having an L-shaped cross section.
8 ', flanges 5a, 5'
It is bolted to a '. As is clear from FIGS. 1 and 2, a plurality of upright plates 9, 9 ′ are provided at equal intervals along the ends of the enlarged diameter portions 5, 5 ′, and the corresponding upright plates 9, 9 ′ are provided. A stopper bolt 10 for limiting the extension of the flexible member 7 to a predetermined value is inserted into the bolt insertion hole.

In this embodiment, the annular ends 4, 4 'of the outer tube members 6, 6' are respectively provided with annular portions 11, 11 'which are continuous with the enlarged diameter portions 5, 5'. And body holding rings 12, 12 '. These annular parts 11,
11 'and the holding rings 12, 12' are provided with flanges 11a, 11a ', 12a, 12a', respectively, and each flange is provided with a bolt insertion hole. Bolts 13 and 14 are inserted through bolt insertion holes of the flanges 11a and 12a and 11a 'and 12a', and the annular portion 11 and the holding ring 12 are formed through the flanges 11a, 12a and 11a 'and 12a'. The part 11 'and the holding ring 12' are fixed to each other.

The holding rings 12, 12 'are respectively provided with fixing bolts 15, 15 in bolt holes drilled at equal intervals in the circumferential direction.
16 is inserted. These fixing bolts 15, 16
Constitutes fixing means for fixing the annular ends 4, 4 'of the outer tube members 6, 6' to the tubes 2, 2 '.

The ends of the annular portions 11 and 11 'are tapered, and annular seal rubbers 17 and 18 are provided between the lower surface and the surfaces of the tubes 2 and 2'.

In this embodiment, the outer pipe members 6, 6 'are divided into four parts in order to facilitate the assembling work on a water bridge or the like. At the circumferential ends of the components of the outer tube members 6, 6 ', joining flanges 19, 19' having bolt insertion holes for joining the components are provided. The joint 1 can be assembled by inserting the bolt 20 through the bolt insertion hole of '′ and fixing the adjacent flanges. In FIG. 1, reference numeral 21 denotes an air vent hole, and reference numeral 22 denotes a water vent hole.

Next, the operation of the flexible joint 1 will be described. In the state of FIG. 1, the pipe 2,
When the 2 ′ expands and contracts, the joint 1 moves its holding ring 12, 1
Since 2 'is fixed to the fixing tubes 15, 2 by the fixing bolts 15, 16, it expands and contracts following the expansion and contraction of the tubes 2, 2'.

For some reason, one of the tubes (for example, 2) is biased to cause a large expansion and contraction movement. In this case, water leaks in the space, but the joint 1 is displaced following the pipe 2 even in this case, so that water does not leak out of the joint 1.

Further, even when the ends of the pipes 2 and 2 'sink down due to the sinking of the bridge girder and the like and the pipes 2 and 2' are inclined, the flexible member 7 of the joint 1 is deformed following this inclination. This can prevent the joint from breaking and leaking water.

The fixing means of the joint 1 is a fixing bolt 1
Various fixing means can be used without being limited to 5 and 16. Further, the flexible member is not limited to the rubber containing the reinforcing cord, and a member having sufficient flexibility and strength can be selected from various rubbers and synthetic resins. The shape of the flexible member is not limited to that of the above-described embodiment, and any other shape may be used as long as it allows the joint 1 to expand and contract.

[0018]

As described above, according to the present invention, 1
The annular end portions of the pair of outer tube members are fixed to the respective tubes by fixing means, and the flexible member is stretchably stretched between the annular enlarged diameter portions of the outer tube members. Following the sliding, the joint can also expand and contract, so that even if the tube moves significantly, the tube does not escape from the joint. Further, even when the pipe is inclined, the joint can be inclined to follow the inclination, so that there is no possibility that the joint is broken. Therefore, it is possible to provide a safe joint that does not have to worry about water leakage from the joint under any circumstances.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a water leakage repairing expansion / contraction flexible joint for a pipeline.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a front view showing a conventional water leakage prevention joint.

[Explanation of symbols]

 2, 2 'pipe 3 Joint 4, 4' Annular end 5, 5 'Annular expanded part 6, 6' Outer pipe member 7 Flexible member 15, 16 Fixing means 17, 18 Seal member

Claims (1)

(57) [Claims] An annular end fitted to a portion of each tube adjacent to a joint connecting ends of adjacent tubes, and an annular enlarged portion extending from the annular end to above the joint. A pair of outer pipe members, a flexible member made of rubber, synthetic resin, or the like, which is stretchably stretched between the annular enlarged diameter portions of the pair of outer pipe members, and each annular end of the outer pipe members And a sealing member disposed between each annular end of the outer pipe member and each pipe surface.