JP2647624B2 - Double corrugated pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double corrugated pipe which can be easily connected.

[0002]

2. Description of the Related Art Conventionally, since it is used by being buried underground in a transport pipe and a discharge pipe for a fluid or the like, or an electric wire conduit which draws and uses an electric wire or the like, it has been used under external pressure such as earth pressure. There is known a corrugated tube in which a spiral wave or a ring-shaped wave is formed on an outer peripheral surface and an inner peripheral surface so as not to be deformed.

[0003] Since waves are formed on the inner peripheral surface of these corrugated pipes, when they are used as drainage pipes and the like, the flow of the fluid stays due to the waves on the inner peripheral surface and the flow velocity decreases,
There was a problem that dirt and mud settled in the concave portion of the wave. In order to solve these problems, a corrugated pipe with a bottom plate provided with a gutter-shaped bottom plate on the bottom surface of the corrugated pipe has been known (Japanese Patent Publication No. 2-28754).

[0004] The corrugated pipe with a bottom plate has a bottom plate protruding from one open end so that the corrugated pipe can be easily connected.

[Problems to be solved by the invention]

[0005] Since the bottom plate is fixed to the bottom side of the corrugated tube, the above-mentioned corrugated tube has a fixed vertical direction when burying or the like, so that the construction is troublesome. Further, the fluid can only be used as a flow path in the bottom plate portion, and is not suitable for securing a large flow rate.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a double corrugated pipe which can ensure a large flow rate and can be easily connected.

[0007]

The present invention has the following arrangement to achieve the above object. That is, the inner circumferential surface of the corrugated tube waveform continuous to the inner peripheral surface is formed covering Migihitsuji
The inner pipe through which the fluid flows is fixed to the inner peripheral surface of the corrugated pipe.
And one end of the inner tube is adjacent
As a connecting part for connecting corrugated pipes
One end of the inner pipe projects outward beyond one end of the corrugated pipe.
Protruding part, and said protruding part has its axis
Multiple cuts formed in different directions
Of the several protruding pieces, the protruding pieces adjacent to each other
And is formed in a tapered projection . Here, it is preferable that the cut has a wedge shape.

[0008] The tip of the tapered projection is
The waterproof effect is achieved by fitting the ring-shaped packing member.
Can also be demonstrated.

[0009]

Next, the operation will be described. Double corrugated pipe
One end of the inner tube to be formed
Protruding parts that protrude outward, and inside adjacent corrugated pipes
It can be used as a connecting part connected to the other end of the side tube. Only
Also, this protruding part has a plurality of
Because it has been cut into multiple projecting pieces by cutting,
Double corrugated as a result of easy formation on tapered protrusions
Connection between pipes can be easily performed. Also, like this
By connecting the double corrugated pipes
Can form a continuous tubular flow surface and
The side pipes can have an insertion structure at the ends.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows the structure of a double corrugated pipe according to the present invention, and reference numeral 10 indicates a double corrugated pipe. In this plan view, the double corrugated pipe 10 has an outer pipe 12
A ring-shaped wave 16 is formed on the outer peripheral surface of the outer tube 12. On the other hand, the inner pipe 14 is a straight pipe, and the inner pipe 14 and the valley 12a of the outer pipe 12 are fixed.

The inner tube 14 is provided over the entire length of the outer tube 12, and the inner tube 14 is
Is formed as a protruding portion 22 slightly protruding from one of the opening ends 12A. A plurality of wedge-shaped notches 24 are formed at predetermined intervals in the circumferential direction from the leading edge 23 of the protruding portion 22 in the axial direction (see FIG. 2). Notch 2 of protrusion 22
The pieces separated by 4... Are referred to as projecting pieces 22a. Each protruding piece 22a is provided with a small hole 25 at each adjacent edge of the adjacent protruding piece 22a.・ ・
And through a connecting member 26 such as a wire or a string. Then, the protruding portion 22 is connected to the connecting portion 2 for tapered connection.
It becomes 7.

At the other open end 12B of the double corrugated pipe 10, the outer pipe 12 and the inner pipe 14 are flush with each other.

The double corrugated pipe 10 is constructed as described above. When the double corrugated pipes 10 are connected to each other, the upstream side is defined as an open end 12B.
The connecting portion 27 of the double corrugated pipe 10 on the upstream side is inserted into 2B. Then, the adjacent outer tubes 12, 12 are jointed and connected (see FIG. 1).

By connecting the double corrugated pipes 10 in this manner, a continuous flow surface without irregularities can be formed, and a large flow rate can be secured. Further, since the inner pipes 14 have an insertion structure at the ends, leakage of fluid and radial displacement of the double corrugated pipe 10 can be prevented.

Although the inner pipe 14 is a straight pipe in the above embodiment, it may be a double pipe as shown in FIGS. 3 (a) to 3 (c). That is, the inner tube 14 itself may be provided with gentle irregularities. This way,
Further, the strength of the double corrugated pipe 10 can be ensured.

As shown in FIG. 4, each protruding piece 22a
Ring-shaped packing member 3 so that the tip of
The connecting portion 27 may be configured such that 0 is fitted. In this case, the connection portion has a waterproof structure by the packing member 30, and the waterproof effect is exhibited.

As described above, various preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

[0019]

The double corrugated pipe according to the present invention is not limited in the vertical direction of construction as in a conventional corrugated pipe with a bottom plate, and can be easily constructed. Further, since the inner pipe is located all around the inner circumferential surface of the outer pipe, a larger flow rate of fluid can be flowed as compared with a conventional corrugated pipe with a bottom plate.

Further , one end of the inner pipe is connected to one of the corrugated pipes.
Protrude outward from the end to form a projection, and
A multi-cut formed by multiple cuts in the axial direction of the protrusion
Of the number of protruding pieces, mutually adjacent protruding pieces
Connect the tapered protrusion formed by joining to the adjacent corrugated
Can be used as a connection to the other end of the inner tube
You. Therefore, the connection between the double corrugated pipes can be easily performed.
I can. Moreover, in this way double corrugated
Connecting pipes creates a continuous tubular flow surface
Can be formed and a large flow rate can be secured. In addition, corrugated pipe
The inner tubes are inserted at the ends so that fluid leakage
And to prevent the double corrugated pipe from shifting in the radial direction.
Can be.

[0021] By a wedge cut of such protrusions can be formed easily tapered protrusion.

[Brief description of the drawings]

FIG. 1 is a partial front view showing a main part of a double corrugated pipe according to the present invention.

FIG. 2 is an explanatory view showing a connection state and a structure of a double corrugated pipe according to the present invention.

FIG. 3 is a partial sectional view showing a structure of a double corrugated pipe.

FIG. 4 is an explanatory view in which a tip of a protruding portion of the double corrugated pipe is formed to be tapered.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Double corrugated pipe 12 Outer pipe 14 Inner pipe 18 Fitting lid 22 Projecting part 24 Notch 27 Connecting part

Claims (3)

(57) [Claims] The inner peripheral surface according to claim 1 Copolyester waveform consecutive formed in the outer peripheral surface <br/> Rugate tube covering the Migihitsuji inner tube flowing fluid
A connecting portion fixed to the inner peripheral surface of the corrugated pipe and connecting adjacent corrugated pipes.
The one end of the inner pipe is more outward than one end of the corrugated pipe.
And a plurality of protrusions formed in the axial direction thereof.
Of the protruding pieces separated by the cut,
The protruding pieces adjacent to each other are connected to each other
A double corrugated pipe characterized by being formed in . Wherein Ru inclusive switching formed in the protrusion wedge der
請 Motomeko 1 double corrugated tube as claimed. 3. A phosphorus tip is provided at the tip of the tapered projection.
The double corrugated pipe according to claim 1 or 2, wherein a gasket-shaped packing member is fitted .