JPH0542880U - Telescopic flexible tube - Google Patents

Abstract

(57) [Summary] [Purpose] In a flexible pipe that connects between a pipeline buried in the ground that may sink and a structure that does not sink, the joint to the buried pipeline is Make sure to follow the pipe end of the buried pipe to prevent water leakage. [Structure] A regulating plate 7 is attached to the outer surface of the expandable flexible tube 3 near the joint 6 to the buried pipeline 1 from the outer surface toward the ground. A moment M acting to incline the joint portion 6 with respect to the pipe axis O ₁ of the buried pipeline 1 is received by the ground via the regulation plate 7, and leakage of water due to this inclination is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a telescopic flexible tube for connecting a pipeline embedded in the ground that may sink and a structure that does not sink.

[0002]

[Prior Art]

 For concrete structures that are built on the ground that may sink, foundation piles should be laid down to the ground layer where there is no danger of sinking so that the structure itself does not sink or tilt even if the ground sinks. The measures are taken. However, since the pipeline that should be connected to this structure is laid in the ground where there is a risk of subsidence, it will also subside when ground subsidence occurs, and this buried pipeline and concrete structure There will be a large displacement between them.

Conventionally, in order to absorb such displacement, as shown in FIG. 3, an intermediate portion is provided between the buried pipeline 11 laid on the ground where there is a possibility of sinking and the structure 12 where sinking does not occur. A flexible tube 13 having a bellows-shaped flexible portion 14 is connected to the flexible tube 13. A flange 15 to be embedded in the wall of the structure 12 is formed on the outer circumference of one end of the expandable flexible tube 13, and a pipe end of the embedded pipe line 11 is inserted at the other end thereof. Is formed with a joint portion 16 for connecting.

[0004]

[Problems to be solved by the device]

By the way, when the conventional expandable flexible tube 13 having the structure as shown in FIG. 3 is used, the axis O of the expandable flexible tube 13 must be bent so as to have an S-shape as the ground subsides. Not. However, since the flexural rigidity of the expandable / contractible flexible part 14 is generally larger than the flexural rigidity of the joint part 16, when the ground subsidence becomes large, as shown in FIG. Follow-up of the joint portion 16 to the pipe end portion of the passage 11 may be hindered, the joint portion 16 may be inclined with respect to the axis O ₁ of the buried pipe passage 11, and water may leak from the joint portion 16. There is a problem.

In order to prevent this, it is conceivable to use, as the expandable flexible tube 13, a flexible elastic part 14 having a small bending rigidity. There is a problem that the depth of burial of the road 11 is limited and it is not practically applicable.

Further, as shown in FIG. 5, the length L between the joint portion 16 and the telescopic flexible portion 14 is set so that the joint portion 16 surely follows the sinking of the pipe end portion of the buried pipeline 11. Although a relatively long straight pipe section 17 can be provided to deal with this, there is a problem in that it is expensive accordingly.

Therefore, the present invention solves such a problem, and the joint portion on the side of the buried pipeline can be surely made to follow the pipe end portion of the buried pipeline, and there is no risk of water leakage, and a long straight pipe is also provided. An object of the present invention is to provide a telescopic flexible tube which can be constructed at low cost without providing a section.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has an expandable flexible tube for connecting between a pipeline buried in the ground that may sink and a structure that does not sink, and a joint portion at the end. At the same time, on the outer surface in the vicinity of the joint portion, a regulation plate that enters the ground from this outer surface is attached.

[0009]

[Action]

 According to this structure, even when a moment that tilts the joint portion with respect to the pipe axis of the buried pipeline acts due to the bending rigidity of the expansion and contraction flexible portion when the ground subsides, the moment causes the restriction plate to move. Since it is received by the ground through the joint, the joint reliably follows the subsidence of the pipe end of the buried pipeline.

[0010]

Embodiment 1 In FIG. 1, reference numeral 1 denotes a buried pipeline that is buried in the ground where there is a risk of subsidence, and is connected to a concrete structure 2 constructed so that subsidence does not occur in this ground. An expandable flexible tube 3 made of a flexible material such as rubber is interposed between the tube end 1a of the buried pipeline 1 and the wall of the structure 2.

The telescopic flexible tube 3 has one end 3a and the other end 3b, each of which is composed of a short straight tube, and a bellows-shaped telescopic flexible portion 4 is provided in an intermediate portion between them. The flexible portion 4 is configured to be flexible and flexible. The expandable flexible tube 3 is fixed to the structure 2 by embedding a flange 5 provided on the outer periphery of the one end 3a of the expandable flexible tube 3 in the wall of the structure 2. At the front end of the other end 3b of the expansion / contraction flexible tube 3, the pipe end 1a of the buried pipeline 1 is inserted to form a socket-like joint portion 6 connected to the pipe end 1a. ing.

On the outer surface of the other end portion 3b in the vicinity of the joint portion 6, a regulation plate 7 that is arranged perpendicularly to the pipe axis and enters the ground is attached. As shown in FIG. 2, the regulation plate 7 is formed so as to surround a half circumference of the other end portion 3b, and in the illustrated example, a rectangular plate material is welded to the other end portion 3b. ..

In such a configuration, when the buried pipeline 1 sinks to the structure 2 due to the subsidence of the ground, as shown in FIG. 1, the flexible axis expands and contracts so that the pipe axis O has an S-shape. The bending of the pipe 3 absorbs the displacement at the time of the settlement. At that time, due to the bending rigidity of the expansion / contraction flexible portion 4, a moment M for inclining the joint portion 6 with respect to the pipe axis O ₁ of the buried pipeline 1 acts. It can be reliably received through the ground. Therefore, it is possible to prevent a situation in which the joint portion 6 completely follows the pipe end portion 1a of the buried pipe passage 1 to form a gap and cause water leakage. Moreover, since it can be constructed by only attaching the regulation plate 7 to the other end 3b of the flexible tube 3, the construction can be made inexpensive.

[0014]

EFFECTS OF THE INVENTION As described above, according to the present invention, since the regulation plate is attached in the vicinity of the joint portion, when the ground subsides, a moment acts to incline the joint portion due to the bending rigidity of the elastic flexible portion. However, since the moment is received by the ground via the regulation plate, the joint part can reliably follow the pipe end of the buried pipeline, thus preventing water leakage reliably. Since it is sufficient, an inexpensive structure can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a telescopic flexible tube according to an embodiment of the present invention.

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

FIG. 3 is a vertical cross-sectional view of a conventional expandable flexible tube.

FIG. 4 is a vertical cross-sectional view showing a state of the expandable flexible tube of FIG. 3 when the ground is subsided.

FIG. 5 is a longitudinal sectional view of another conventional expandable flexible tube.

[Explanation of symbols]

 1 Buried pipeline 2 Structure 3 Flexible tube 6 Joint part 7 Regulation plate

Claims (1)

[Scope of utility model registration request] 1. An expandable and contractible flexible tube for connecting between a pipeline embedded in the ground that may sink and a structure that does not sink, having a joint portion at its end,
A stretchable flexible tube having a restriction plate attached to the outer surface in the vicinity of the joint portion so as to enter the ground from the outer surface.