JPH0892947A - Perforated drainage pipe - Google Patents

Abstract

(57) [Summary] [Purpose] Storage of perforated drainage pipes used in civil engineering, etc.
The efficiency of transportation is reduced, the cost is reduced, and the workability of connecting drainage pipes is improved. [Structure] An outer pipe 1 having a large number of water passage holes 3 formed in its outer peripheral portion, as opposed to an outer pipe 1 having a water passage hole 3 formed in its outer peripheral portion.
The inner tube 2 having an outer surface shape along the inner surface of and having a gap of 0.1 to 2 mm between both surfaces is inserted to form a double tube, and the inner tube 2 is extended from the outer tube 1 and only both ends are formed. In the state of being polymerized, this portion was adhered so that it can be continuously provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforated drainage pipe used for guiding and draining rainwater, groundwater, spring water, etc., to appropriate places in civil engineering work and the like.

[0002]

2. Description of the Related Art Conventionally, on poorly drained ground, ground with a lot of flooding, etc., it has been practiced to collect water by burying a perforated drainage pipe in the ground and guide it to the appropriate place for drainage. There is. This drainage pipe is generally used by forming a desired long length by continuously connecting plastic pipes having a constant diameter and a constant length, which are provided with a large number of small holes on the outer periphery thereof, using joint parts.

[0003]

However, since the conventional drainage pipe is a pipe having a constant diameter and a constant length as described above, it must be stacked and stored and transported one by one, which is bulky. There was a problem that the cost was high. In particular, polyethylene drainage pipes with holes formed in them are soft, so they are transported in rolls, but the winding diameter becomes large, and for example, a drainage pipe with a diameter of 60 mm has a diameter of about 1.3 m or more. There was a problem that if the wire could not be wound and it was thicker than this, the winding diameter would become larger and larger.

The present invention focuses on the bulkiness of the drainage pipes as described above, reduces this problem, improves the efficiency of storage and transportation, reduces the cost thereof, and improves the drainage pipe connection workability. It is intended to provide a structure of a perforated drainage pipe which is not damaged.

[0005]

In order to solve the above-mentioned problems, the present invention relates to an outer tube having a water passage hole in its outer peripheral portion, and a tube having an outer surface substantially along the inner surface of the outer tube. It is characterized in that a perforated drainage pipe is configured as a double pipe in which an inner pipe having a water passage hole is inserted in the outer peripheral portion of the inner pipe and the inner pipe can be freely extended from the outer pipe.

[0006]

By using a double tube for the inner and outer tubes, two tubes can be handled as one tube. The drainage pipe may be installed by extending the inner pipe from the outer pipe and adhering these portions in a state where only both ends are polymerized. This is installed in sequence and lengthened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a partial perspective view of a drainage pipe according to the present invention in a double pipe state, and FIG. 2 is a partial perspective view of a state in which this inner pipe is extended from inside the outer pipe.

For both the outer pipe 1 and the inner pipe 2, a large number of water passage holes 3 are formed in a plastic sheet or a metal sheet, and then bent into a triangular pipe, and the sheet end portion 4 is bonded by an adhesive or heating. And use it as a drainage pipe. At this time, the outer tube 1 and the inner tube 2 have similar cross-sections, and the outer tube 1 and the outer tube 1 are preferably slightly smaller in size so that the outer surface thereof substantially matches the inner surface of the outer tube 1. The length may be arbitrary, but for example, it is formed to have the same length, and this inner tube 2 is inserted into the outer tube 1,
It is a perforated drainage pipe in a double pipe state according to the present invention.

The sizes of the outer pipe 1 and the inner pipe 2 are preferably set so that a gap of about 0.1 to 2 mm is formed between them, and if the gap is too small, the inner pipe is bent when the pipe is bent. There is a possibility that it may be difficult to stretch the pipe 2, and if the gap is too large, when the ends of the inner and outer pipes are glued together in a stretched state, poor adhesion tends to occur and sand or soil may enter. Occurs.

The plastic sheet is made of vinyl chloride, polypropylene, polyethylene terephthalate (PET),
Polystyrene or the like having a wall thickness of about 0.3 to 5 mm can be preferably used, but it is preferable to use properly depending on the size of the tube. The metal sheet can be aluminum or other metal material. The water passage hole 3 can be appropriately set depending on the size of the pipe and the purpose of use, but generally has a diameter of about 1 to 10 mm.

The material of the drainage pipe according to the present invention is not limited to the above embodiment, and the manufacturing method is not limited to the above embodiment, and extrusion molding can be performed. FIG. 3 shows a modified example of the cross section of the drainage pipe. As shown in FIG. 3A, both the outer pipe 11 and the inner pipe 21 may have a rectangular cross section, and as shown in FIG. Outer tube 1
2, the inner tube 22 can also be a tubular shape with a circular cross section,
Other shapes not shown can also be used.

An example of the construction of the present invention is shown below. Wall thickness 0.
A 5 mm hard vinyl chloride sheet cut into 220 mm width is cut into a long sheet, and water holes with a diameter of 3 mm are drilled at a rate of 1 in 20 mm, and this sheet is bent to form a triangular section with a side of 70 mm. It has a tubular shape, and the glue allowance part 1
An outer tube 1 was manufactured by applying an adhesive to 0 mm and bonding the pieces to a length of 4 m. The inner tube 2 was manufactured in the same manner as the outer tube 1 and had a triangular shape with a side of 68.0 mm and a length of 4 m. The inner tube 2 was inserted into the outer tube 1 to form a double tube.

At the construction site, the double pipe was put in a groove to be used, the inner pipe 2 was pulled out to a total length of 7.9 m, and an adhesive was applied to the overlapped 10 cm width portions of both pipe ends to continuously connect them. In the same manner as above, the double inner and outer pipes 1 and 2 are respectively extended and continuously arranged, and the end of the outer pipe 1 of one continuous pipe is fitted to the end of the inner pipe 2 of another continuous pipe. And glue them in the same way as above,
The drainage pipe was made longer.

[0014]

INDUSTRIAL APPLICABILITY The present invention provides a drain pipe having a double structure of an inner pipe and an outer pipe, which is extended and continuously connected, so that the bulkiness in storage and transportation is reduced by half to improve storage and transportation efficiency. In addition, the storage and transportation costs can be cut in half. To connect drainage pipes, simply extend the double pipes and bond the ends of both pipes in a superposed state.In the case of bonding, there is no need to prepare joint parts and work jigs separately. The work is simplified and a reliable connection is made.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a perforated drainage pipe according to the present invention.

FIG. 2 is a partial perspective view showing a state in which an inner pipe of the perforated drainage pipe of FIG. 1 is extended.

FIG. 3 is a cross-sectional view showing an example of another shape of the perforated drainage pipe according to the present invention, in which (A) and (B) show different examples.

[Explanation of symbols]

 1 Outer pipe 2 Inner pipe 3 Water passage hole

Claims (1)

[Claims] 1. An inner pipe having a water passage hole is inserted into an outer peripheral portion of a pipe having an outer surface extending substantially along the inner surface of the outer pipe. , A perforated drainage pipe with a double pipe structure that allows the inner pipe to be freely extended from the outer pipe.