JPH078949Y2 - Connection structure of tube with independent wave - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a structure of a connecting portion of an independent wave corrugated pipe, which is configured to connect the independent wave corrugated pipes used for underground underground conduits and the like. It is about.

That is, according to the present invention, in the connection portion of the independent wave corrugated pipe, the corrugated pipes are butted against each other at their troughs, and the butted valleys have substantially the same side surface shape as the corrugated troughs of the corrugated pipe. The present invention relates to a connecting portion structure in which a ring having an adhesive layer on its side surface is mounted and fixed by a shell from the outside.

(Prior Art) In the conventional connection of this type of independent wave corrugated pipe, an adhesive is applied to the corrugated outer peripheral surface of the independent wave corrugated pipe and the inner peripheral surface of the straight pipe joint, and corrugated It had a connection structure that inserts a pipe into a straight pipe joint.

(Problems to be solved by the invention) However, in such a conventional connecting portion structure for a pipe with independent wave, no surface pressure can be expected and the reliability of the drawing strength and watertightness of the connecting portion is low. . In particular, the watertightness of the connection portion of the underground conduit has been a major drawback.

The present invention intends to solve the above-mentioned conventional drawbacks and to provide a connection part structure of an independent wave corrugated pipe which can enhance the pull-out strength of the connection part and particularly the reliability of watertightness. is there.

(Means for Solving the Problem) As shown in the drawings, the present invention provides a connecting portion for connecting and joining independent wave corrugated pipes 1 to each other in the longitudinal direction.
The independent wave corrugated pipes 1 are abutted against each other at their troughs, and the contact ring 3 has a side face having substantially the same side shape as the corrugated troughs of the corrugated pipe, and a side face provided with an adhesive layer. A ring-shaped openable ring-shaped metal or industrial plastic shell 2 having a width such that each of the corrugated pipes 1 is fitted with at least one corrugated crest of the corrugated pipes 1 is covered with the corrugated pipe mountains. It is characterized in that the ring-shaped shell 2 is closed and fixed with a bolt and nut.

That is, in the present invention, the pipe end of the independent corrugated pipe cuts the trough from the cutting workability. The independent wave corrugated pipes are butted against each other at the corrugated troughs, and a connection ring 3 having substantially the same shape as the corrugated troughs of the independent wave is mounted on the corrugated troughs. Width of the mountain) x 2 +
(Thickness of the connection ring) -A], a metal char 2 having a cross-section of a U-shape having a width dimension such as [α] is placed so as to embrace the respective ridges of the corrugated pipe end to be connected. . Then, the end of the metal shell 2 is tightened with a bolt or the like to be fixed.

(Function) By covering the metal shell 2, pressure is applied from the shell side surface to the corrugated valley side surface and the connecting ring side surface of the independent wave corrugated pipe, and the corrugated pipes can be firmly joined to each other.

Next, an example of the present invention can be configured as follows.

Outer diameter 130 mmφ, inner diameter 100 mmφ, wall thickness 2.5 mm, independent wave corrugated pipe with a pitch of 17 mm is cut at the valley portion of the corrugation, and after the valley portions are butted against each other, the butted valley portion has an outer diameter of 130 mmφ,
A PVC shell 3 with an inner diameter of 108mmφ and a width of 11mm (an adhesive layer is formed by applying an adhesive on the side surface) is attached, and a metal shell with a width such that each of the corrugated pipes is inserted from the outside. 2 (Outer diameter 132 mmφ, Inner diameter 31 mm) is covered on the corrugated pipe,
The corrugated pipes were connected to each other by tightening one end of the metal shell 2 with a bolt. The pull-out strength of the connection portion thus formed was 450 kgf. Further, when a watertightness test (external water pressure 1 kgf / cm ² × 1 hour) of the connection part was performed, no water leaked into the pipe.

By covering with the metal shell 2 as described above, pressure is applied from the side surface of the shell to the corrugated valley surface of the independent wave corrugated pipe and the side surface of the connection ring 3, whereby the corrugated pipes can be firmly bonded to each other.

(Effects) According to the present invention, it is possible to obtain a connecting portion structure of a pipe with independent wave having excellent watertightness and high drawing strength.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an essential part of an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a metal shell according to the embodiment of the present invention. 4 is a plan view of the same, FIG. 4 is a side view thereof, FIG. 5 is a sectional view taken along the line AA ′ of FIG. 3, and FIG. It is a partial cross-sectional side view which shows the principal part of the connection ring which concerns on an example. 1 ... Independent wave corrugated tube 2 ... Metal or industrial plastic shell 3 ... Connection ring 4 ... Adhesive layer

Claims (1)

[Scope of utility model registration request] 1. A connecting portion for connecting and joining the independent wave corrugated pipes 1 to each other in the longitudinal direction, but the independent wave corrugated pipes 1 are butted against each other at their troughs, and the corrugated valleys of the corrugated pipes are fitted to the butted valleys. The connecting ring 3 having a side surface shape substantially the same as that of the section and having an adhesive layer provided on the side surface is mounted, and the width of the corrugated pipe 1 can be opened so that at least one corrugation of each corrugation is inserted. A ring-shaped shell 2 is covered with a mountain of the corrugated pipe, and the ring-shaped shell 2 is closed and fixed with a bolt and nut to be attached, and the connecting portion structure of the independent corrugated pipe.