JPH05263414A - Covered conduit drain pipe - Google Patents

Abstract

PURPOSE:To enable driving in the longitudinal direction into the underground by increasing the tensile strength and the compressive strength in the lengthwise direction. CONSTITUTION:A pipe-main body 1 is made of a filter material 2 having a large number of filtration pores 3. Wire rods made of hard polyethylene-resin are wound around the pipe-main body 1 in the right and left spiral directions, and the intersections of the wire rods are welded to be integrated to provide a tubular core member 4. Further, reinforcing strip bodies 6 are spirally wound around the outer peripheral surface of the pipe-main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an underdrain drainage pipe which is buried and used in a golf course, a wetland, and other places.

[0002]

2. Description of the Related Art Conventionally, as a drainage pipe of this kind, as described in Japanese Utility Model Publication No. 54-27206,
A tape-shaped net is spirally wound so that the side edges thereof are sequentially overlapped to form a resin tube, and a filter material made of non-woven fabric or glass fiber or other woven cloth is provided between the overlapping portions of the net in the resin tube. And a structure in which a reinforcing strip is fused and fixed to the inner and outer peripheries of a resin pipe in a spiral shape, and a stretched film (slit yarn) with a large number of cuts is used as a filter material. A film having a large number of small holes formed by polymerizing a plurality of stretched films is used.

[0003]

However, according to the former underdrain drainage pipe, there is a possibility that mud and sand may enter into the fine gaps of the nonwoven fabric or the glass fiber as the filter material and the clogging may occur in a short period of time. In addition, since the resin pipe is formed of a net, when the drain pipe is pulled into the underdrain, the resin pipe is stretched and the filter material is broken, and muddy water flows into and accumulates in the drain pipe. was there.

On the other hand, when the latter type of filter material is used, such a problem is solved for the time being, but like the former underdrain drainage pipe, it is almost resistant to the compressive force in the longitudinal direction. Since it has no force and can easily bend or buckle, it can be laid horizontally in the ground, but it cannot be installed vertically and used, limiting the location of wastewater treatment in the ground. There was a problem that was done. An object of the present invention is to provide an underdrain drainage pipe that can solve such problems.

[0005]

In order to achieve the above-mentioned object, the underdrain drainage pipe of the present invention has a large number of pipe walls communicating with each other as shown in the drawings corresponding to the embodiments. A tubular core material 4 made of a mesh body in which a large number of filament materials are crossed and the crossing portions are integrated with a tube main body 1 formed by a filter material 2 having small filtration holes 3, 3, ... It is characterized in that the tubular core material 4 is integrally fixed to the filter material 2 by splicing and the reinforcing strip 6 is spirally wound around the outer peripheral surface of the tube main body 1.

[0006]

The tube core 1 is provided with tensile strength and compression resistance in the longitudinal direction by the tubular core material 4 which is attached to the filter material 2 of the tube body 1, and is spirally wound around the outer peripheral surface of the tube body 1. The shape of the drainage pipe is improved with the attached reinforcing strips 6 and there is almost no risk of contraction, bending or buckling even if a compressive force acts in the lengthwise direction. It can be driven vertically into the ground to perform drainage from the upper layer to the lower layer of the ground.

Further, since the tubular core material 4 has a mesh much larger than the filter small holes 3 of the filter material 2, it does not have any adverse effect on the drainage action. It is possible to provide a uniform tension over the entire length and the entire circumference of No. 1 and therefore, the entire pipe exhibits an efficient drainage action.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.
A resin pipe 1 is mainly composed of a filter material 2 having a large number of filtration small holes 3 formed in a tubular shape. The filter material 2 is a stretched film made of polyethylene resin and having a thickness of about 0.05 to 0.2 mm, and is provided with a large number of cuts and is torn in the direction of the cuts to form a large number of filaments. One formed by fusion-bonding the intersecting portions or a thin flat resin yarn made of polyethylene resin stretched in the length direction is used for plain weaving and the intersecting portion of the weft and warp yarns Are welded to each other to form a filter material 2 having a large number of rectangular strip filtration small holes 3, 3, ...

The filter small holes 3 of the filter material 2 are formed to have a constant size in the range of 0.3 to 3 mm depending on the distance between the yarns arranged in the vertical and horizontal directions. Reference numeral 4 is a tubular core material made of a net-like body which is harder than the filter material 2 and has a thickness several times as large as that of the linear material. In parallel with each other at regular intervals in the direction, and weld the intersection of the linear member 4a inclined to the right and the linear member 4b inclined to the left,
It is formed by integrally forming a mesh body having a large number of diamond-shaped meshes 4c having a size of 3 to 8 mm and curving this mesh body in a tubular shape.

As shown in FIG. 2, the tubular core material 4 is sandwiched between the inner and outer filter materials 2 and 2 of the pipe main body 1 in which the filter material 2 is arranged in two layers, the inner and outer layers. May be interposed, or as shown in FIGS. 3 and 4,
The tube main body 1 is formed of one layer of the filter material 2, and the tubular core material 4 is attached to the outer peripheral surface side or the inner peripheral surface side of the filter material 2 and a part of both is spirally formed by an appropriate adhesive 5. It may be adhered to and integrated with. Reference numeral 6 is a thick strip-shaped reinforcing strip made of hard polyethylene resin, which is spirally wound around the outer peripheral surface of the pipe main body 1 and the inner surface thereof is welded, or through a suitable adhesive, the filter material 2 and the tubular core material 4 It is firmly fixed to the.

A brief description will be made on a method for manufacturing such an underdrain drainage pipe, in the case of a drainage pipe having a two-layer filter material 2 as shown in FIG. 2, a strip-shaped filter material 2 having a constant width.
Approximately 1 / of the band-shaped filter material 2 on one half (up to 1/2 width) of
2 A half portion of the filter material spirally and previously wound around a forming shaft (not shown) in the state of supplying and superposing a tubular core material forming a tubular core material having a width, that is, a belt-like net body It is wound so that the other half of the same filter material to be wound next overlaps, and the overlapped portion at the edge is spirally bonded via the adhesive 5 applied to one side edge of the filter material 2. Unify. On the outer peripheral surface of the pipe main body 1 thus formed, the reinforcing strip 6 is spirally wound around the other side edge of the filter material 2 with the adhesive 5 interposed therebetween, and the reinforcing strip overlapped at the other side edge. It is obtained by integrally bonding the inner surface of the body 6 to the filter material 2 and the mesh body.

Similarly, in the case where the pipe main body 1 as shown in FIGS. 3 and 4 is formed by one layer of the filter material 2, when the tubular core material 6 is arranged on the outer peripheral surface side of the pipe main body 1, a strip shape is formed. An adhesive 5 is formed by superimposing a belt-like net body along the filter material to be wound next on the preceding filter material in a state where one side edge portion of the filter material 2 is along the other side edge portion. The other side edge portion of the filter material 2 may be wound in a spiral shape while being adhered. When the tubular core material 6 is arranged on the inner peripheral surface side of the pipe main body 1, the same width is provided on the lower surface of the filter material 2. The belt-like nets may be overlapped with each other and spirally wound around one side edge of the preceding filter material while the other side edge of the filter material to be wound next is polymerized. The reinforcing strip 6 may be wound in the same manner as the method described with reference to FIG.

[0013]

As described above, according to the underdrain drainage pipe of the present invention, the pipe wall is formed by the filter material 2 having a large number of filtering small holes 3, 3 ... A tubular core material 4 made of a mesh body formed by intersecting a large number of filaments and integrating the intersections is attached to the formed pipe main body 1,
Since the tubular core material 4 is integrally fixed to the filter material 2 and the reinforcing strip 6 is spirally wound around the outer peripheral surface of the tube main body 1, the tubular material attached to the filter material 2 of the pipe main body 1 is tubular. The core material 4 allows the pipe main body 1 to impart tensile strength and compression resistance in the longitudinal direction, and the shape of the drainage pipe is maintained by the reinforcement strip 6 spirally wound around the outer peripheral surface of the pipe main body 1. In addition to good performance, there is almost no risk of contraction, bending or buckling even if a compressive force acts in the length direction, and therefore it can be easily driven vertically into the ground. The vertical laying is possible, and the drainage action from the upper layer to the lower layer of the ground can be performed.

Further, since the tubular core material 4 has a mesh much larger than the filtering small holes 3 of the filter material 2, it does not have any adverse effect on the drainage action. It is possible to provide a uniform tension over the entire length and the entire circumference of No. 1 and therefore, the entire pipe exhibits an efficient drainage action.

[Brief description of drawings]

FIG. 1 is a side view of a partially cutaway drainage pipe,

FIG. 2 is a partially enlarged vertical side view of the same,

FIG. 3 is a partially enlarged vertical side view of another structure,

FIG. 4 is a partially enlarged vertical sectional side view of another structure,

FIG. 5 is an enlarged plan view of a tubular core material.

[Explanation of symbols]

 1 Pipe Main Body 2 Filter Material 3 Small Filtration Hole 4 Tubular Core Material 6 Reinforcement Strip

Claims (6)

[Claims] 1. A pipe main body formed of a filter material having a large number of filtration small holes whose pipe walls communicate with each other between inner and outer peripheral surfaces, and a large number of linear members are crossed to integrate the crossing portions. An underdrain drainage pipe in which a tubular core material composed of a net-like body is attached, the tubular core material is integrally fixed to a filter material, and a reinforcing strip is spirally wound around the outer peripheral surface of the pipe main body. 2. The underdrain drainage pipe according to claim 1, wherein the filter material is a slit yarn (split cloth) made of a stretched film, which is arranged vertically and horizontally to integrally weld the intersecting portions. 3. The underdrain drainage pipe according to claim 1, wherein the filter material is a thin flat stretched film arranged vertically and horizontally and the crossing portions are welded and integrated. 4. The underdrain drainage pipe according to claim 1, wherein a plurality of filter materials are stacked. 5. The underdrain drainage pipe according to claim 1, wherein the tubular core material is formed by spirally winding a plurality of synthetic resin filaments in the left-right direction and welding the intersecting portions thereof. 6. The underdrain drainage pipe according to claim 1, wherein a tubular core material is interposed between the inner and outer filter materials.