JP4203932B2 - Water collecting pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water collecting pipe that collects groundwater and drains it to the surface.
[0002]
[Prior art]
Conventionally used water collection pipes are generally cylindrical cylinder pipes, PVC pipes, etc. with water collection holes processed, and water collection pipes and pipe cross sections that are grooved on the outer circumference of the pipe to make it easier to take in groundwater. There is also a synthetic resin drainage pipe with a wave shape.
However, {circle around (1)} metal pipes such as steel pipes have significantly reduced water collecting capacity. If corrosion-resistant steel pipes such as galvanized steel pipes and resin-lined steel pipes are used to improve the corrosion resistance, the corrosion resistance of the pipe body will be improved, but the metal must be exposed in the water collecting holes. A sufficient effect cannot be obtained.
[0003]
However, {circle over (2)} in the formation where a large amount of spring water, sand, gravel, or the like flows out, the water collecting pipe inserted when the guide pipe is extracted may be pushed out. In this case, it is necessary to push the water collection pipe by a boring machine, but in the case of a synthetic resin pipe, it may be damaged due to insufficient strength. The water collecting pipe grooved on the outer circumference of the pipe improves the water collecting capacity, but has a drawback that the collected water overflows from the pipe bottom. A water collecting pipe having a corrugated cross-sectional shape has improved capability from the outer periphery, and the water collected in the pipe has a water collecting hole formed in a protruding portion on the inside, so the amount of overflow is small due to its resistance.
[0004]
(3) In addition, water collecting pipes such as regular cylindrical steel pipes and PVC pipes get good inflow from the water collecting holes when inserted in saturated permeable zones. When it is inserted into a groundwater zone that has been locally liquefied like this, since it is cylindrical, it becomes difficult to collect groundwater in the pipe, and the water collection capacity is significantly reduced.
[0005]
[Means for Solving the Problems]
The water collecting tube of the present invention is made of a synthetic resin tube, and in the cross-sectional shape thereof, the outer periphery of the tube is connected to the convex portion and the concave portion , and the convex tube and the concave portion are alternately present at substantially equal intervals. In addition to forming the shape of the peripheral wall of the tubular body, the convex portion becomes a thick portion and the concave portion is a thin portion, and in the thick portion, a metal wire is embedded in the length direction of the tubular body, A water collecting hole is provided in each concave portion on the outer periphery of the tube body.
In a preferred embodiment of the water collecting pipe, the water collecting holes are arranged in the concave portions on the outer periphery of the pipe body with a required phase difference in the axial direction, and are formed on the inner surface of the pipe on the outer peripheral convex portion of the pipe body. The top of the thick wall portion is formed to hang down by a required height less than the top of the tube inner surface of the outer periphery of the tube body.
Specifically, referring to the drawings, the water collecting pipe according to the present invention is indicated by reference numeral 10 in FIG. 1, and this water collecting pipe has a convex section 11 and a concave section in the outer periphery of the cross-sectional shape of the tube 1 made of synthetic resin. to together the 12 consecutive and the convex cylinder and the recesses are formed in a waveform shape present in approximately equal intervals alternately, the thick portion of the convex portion is a metal filament 2 is buried in the longitudinal direction of the pipe Moreover, the thin recesses 12 are provided with water collecting holes 13 with a predetermined pitch P at the bottom. The water collecting holes 13 are arranged so as to have a predetermined phase difference (1/2 · P) with the adjacent water collecting holes 13. The inner surface of the tube 1 is formed as a hollow cylinder 3.
[0006]
【Example】
An embodiment of the water collecting pipe according to the present invention will be described as follows.
As shown in FIG. 2, the cross-sectional shape of the tubular body 1 is obtained by continuously extruding polyvinyl chloride, polyethylene or other hard synthetic resin material together with the metal wire 2 using a normal extruder and molding apparatus. In this example, a corrugated tubular body having an outer peripheral surface continuous with the concave portion 12 and the convex portion 11 is formed, and at the same time, a thick portion 4 is formed on the inner surface of the outer peripheral convex portion 11 and the tube center of the thick portion is formed. The metal wires 21 having the adhesive layer 22 are embedded on the surface of the plurality of thick portions 4 and 4 at symmetrical positions, and the thick wall portions formed on the inner surface of the tube outer peripheral convex portion 3 are embedded. The top portion 41 of the portion 4 is formed so as to hang from the tube inner surface top portion 42 of the tube outer peripheral recess 12 by a required height less than that indicated by the provisional phase circle C.
[0007]
A required number of water collecting holes 13 having a predetermined pitch P in the axial center direction and a phase difference are arranged in each concave portion 12 on the outer periphery of the tube body of the synthetic resin tube.
Although it does not specifically limit as the metal filament 21, In the case of this Example, although the surface smooth piano wire about 2-5 mm in diameter is used, what knurled the surface, a steel twisted wire, etc. May be used to improve the integration with the synthetic resin. Furthermore, the surface of the metal wire 21 is coated with an adhesive layer 22 having excellent adhesion to both synthetic resin and metal such as vinyl acetate, urethane and epoxy, and embedded in the synthetic resin body. In addition, no slip occurs between the synthetic resin and the metal filaments, and an excellent reinforcing effect is obtained.
[0008]
The water collecting pipe configured as described above is used as a connected water collecting pipe having a required length by connecting a water collecting pipe having a predetermined length with a joint body. The above-described joint body will be described as follows. is there.
3 is formed as a corrugated tube having convex and concave portions 51 and 52 corresponding to the convex and concave portions 11 and 12 of the water collecting pipe 10 on the inner and outer circumferences. Both pipes are connected by fitting the end of 10 to the joint body 5.
4 has a cylindrical shape on the inner peripheral surface of the end portion of the water collecting pipe 10, and the joint body 5 formed as a hollow cylindrical body 6 is fitted into the cylinder to connect the two pipes. Has been.
[0009]
The water collecting pipe according to the present invention is used by being inserted into a borehole bored in a groundwater layer as a single water collecting pipe formed to a desired length or as a connecting water collecting pipe in which a single water collecting pipe is connected through a joint.
The present invention is not limited to the above embodiment, and the outer and inner circumferences of the tubular body, the number of sizes, the shape and size of the metal filaments, the protective means, etc. are arbitrarily selected as necessary. It can be designed.
[0010]
【The invention's effect】
The pipe body is made of high-durability by molding it with synthetic resin, and a thick part that works as a reinforcing rib extending in the axial direction of the pipe is formed on the inner surface of the outer peripheral convex part. Since the metal wire having the adhesive layer is embedded in the wire, it has sufficient strength against pressure during insertion. In particular, since the water collecting pipe according to the present invention has a metal wire embedded in the convex portion of the tube, a normal cylindrical PVC pipe or a corrugated PVC pipe in which the metal wire is not embedded has a tubular body with the pressure at the time of insertion. It is strong enough to be installed even under conditions where it breaks.
[0011]
In addition, by forming the outer periphery of the tube cross-section into a continuous wave shape of the recesses and protrusions, the water flowing from the water collecting holes provided with the recesses on the outer periphery is the thick part formed inside the tube of the outer periphery protrusions This makes it difficult for water to escape, and once the inflow water has been taken in, it is difficult for water to escape to the outside of the pipe, and the amount of water flowing down the pipe is increased.
[0012]
In addition, the water collecting pipe according to the present invention is strong enough to be inserted and installed even in a situation where there is no blockage due to corrosion of the pipe body and a large amount of spring water, sand, gravel, etc. flows out and the bored hole wall collapses. have.
In addition, the water collecting pipe according to the present invention is a groundwater receiver that effectively collects water, reduces the amount of inflow water taken into the pipe, and remarkably improves the water collecting capacity. Has the effect of draining quickly.
[Brief description of the drawings]
FIG. 1 is a basic configuration diagram of a water collecting pipe.
FIG. 2 is an explanatory sectional view of an embodiment of the present invention.
FIG. 3 is an explanatory view of a joint.
FIG. 4 is an explanatory view of a joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube 11 Convex part 12 Concave part 13 Water collecting hole 2 Metal line 21 Metal line 22 Adhesive layer 3 Hollow cylinder 4 Thick part 41 Thick part 41 Top part 42 of pipe | tube inner surface of an outer periphery recessed part Joint body 6 Hollow cylinder

Claims (3)

In the cross-sectional shape of the synthetic resin tubular body, the outer periphery of the tubular body is formed into a wave shape in which the convex portions and the concave portions are connected and the convex portions and the concave portions are alternately present at substantially equal intervals. The peripheral wall of the body has the convex part as a thick part and the concave part as a thin part, and a metal wire is embedded in the length direction of the tubular body in the thick part, Is a water collecting pipe provided with a water collecting hole.   2. The water collecting pipe according to claim 1, wherein water collecting holes having a required phase difference in the axial direction are arranged in the respective concave portions on the outer periphery of the pipe body.   The water collecting pipe according to claim 1 or 2, wherein the top part of the thick part formed on the inner surface of the outer peripheral convex part of the pipe body hangs down by a required height from the top part of the inner surface of the pipe outer peripheral concave part.

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