JPH08158418A - Water catchment pipe - Google Patents

Abstract

PURPOSE: To heighten the water catchment efficiency regardless of the hole diameter by forming an outer and an inner pipe through winding a wire round cores arranged circularly while an appropriate spacing is reserved, and by filling the gap between the two pipes with gravel. CONSTITUTION: A water catchment pipe 1 is formed by inserting an inner pipe 3 into an outer pipe 2 and filling the gap between them with gravel 4. The outer pipe 2 is formed by winding spirally a wire 8 with a small spacing round cores 7 which are arranged between an upper ring and a lower ring 6, and a water passage slit narrow on the natural ground side and wide on the inside is formed between turns of the wire 8 having a triangular section, and it is made unlikely that grains of earth and sand flow into the outer pipe 2. The inner pipe 3 is configured the same as the outer pipe 2, wherein the lower ring 6 is welded to the bottom bed so that coaxial arrangement with the outer pipe 2 is generated. A water passage pipe 12 is connected with the upper ring of the inner pipe 3 and inserted through a boring hole, and the hole is excavated to the same as or some greater than the outside diameter of the water catchment pipe 1, and the outer pipe 2 is put in tight contact with the hole wall so that the catchment efficiency of subsoil water is heightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water collecting pipe used for pumping groundwater.

[0002]

2. Description of the Related Art Usually, pumping up of groundwater is carried out by a pumping device 32 as shown in FIG.

In this pumping device 32, a water pipe 34 is inserted into a boring hole 33 excavated to a stratum with a water vein,
After the gravel 36 is dropped from the hole opening around the lower water intake hole 35, a pump 37 is attached to the upper part of the water pipe 34 to configure.

[0004]

However, when the gravel is dropped from the hole mouth as described above, the hole diameter is not uniform and the gravel is clogged in the middle part and is not filled around the water intake hole 35 to collect water. There was a problem of reduced efficiency.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a water collecting pipe capable of enhancing water collecting efficiency without being influenced by the hole diameter.

[0006]

According to the present invention for solving the above-mentioned problems, the water collecting pipe of claim 1 has an inner pipe having a diameter smaller than that of the water collecting pipe inserted into the outer pipe. 3. The outer pipe and the inner pipe are filled with gravel, and the outer pipe and the inner pipe are formed by winding a wire rod around a core material arranged in a circular shape with an appropriate interval with a slight gap. The water collecting pipe is such that an inner pipe having a smaller diameter is inserted into the outer pipe, gravel is filled between the outer pipe and the inner pipe to form a water intake pipe, and the water intake pipe is longitudinally connected via a connecting pipe. Connect multiple,
The outer pipe and the inner pipe are formed by winding a wire rod around a core material arranged in a circular shape with an appropriate interval with a slight gap, and the wire rod has a triangular cross section, a circular cross section or a trapezoidal cross section. And is also
The wire rod has a triangular cross section or a trapezoidal cross section, and the outer surface of the wire rod is slanted in the longitudinal direction, and the inner pipe is a porous pipe, and the water pipe is connected to the inner pipe. Is connected, and a water passage pipe is connected to the innermost pipe of the water intake pipe via a connection pipe, and the connection pipe is a flexible pipe. Is a feature characterized by.

[0007]

According to the above structure, the water collecting pipe can be inserted into the hole while being in close contact with the hole wall, so that the water collecting efficiency can be improved.

Since the gravel is preliminarily filled between the outer pipe and the inner pipe, it is possible to save the trouble of separately filling the hole in the outer circumference of the water collecting pipe with the gravel.

Further, the water collected from the outer pipe passes through the gravel and is pumped up from the inner pipe, so that the gravel serves as a filter.

Further, since a plurality of water intake pipes are connected in the longitudinal direction, the water collecting effect can be enhanced.

Further, since the outer pipe and the inner pipe are formed of wire rods having a triangular cross section or a trapezoidal cross section, a water passage slit having a narrow ground side and a wide inner side is formed between the wire rods, so that the earth and sand are formed. Grains are less likely to flow in. Further, even if it flows in, it will not be clogged inside the water passage slit, so that it will not be clogged.

Further, the outer pipe and the inner pipe are made of wire rods having a triangular or trapezoidal cross section, and the outer surfaces of the wire rods are inclined in the longitudinal direction. However, it becomes difficult for the sediment to flow in.

Further, since the connecting pipe is a flexible pipe,
Greater freedom of installation of water collection pipes.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of the water collecting pipe with a part thereof omitted, FIG. 2 is a longitudinal sectional view of the same, and FIG. 3 is a transverse sectional view of the same.

In the water collecting pipe 1, an inner pipe 3 having a diameter smaller than that of the outer pipe 2 is inserted, and a gravel 4 is provided between the outer pipe 2 and the inner pipe 3.
Are filled and configured. As shown in FIG. 2, the outer tube 2 is formed by spirally winding a wire 8 around a core material 7 arranged between an upper ring body 5 and a lower ring body 6 with a slight gap. ing.

The wire rod 8 has a triangular cross section, and its corners are welded to the core member 7 to form water passage slits 9 between the wire rods 8. The water passage slits are narrow on the natural ground side and wide on the inner side. ing.

Such a water passage slit 9 having a narrow ground side and a wide inner side makes it difficult for the sediment particles to flow into the outer tube 2, and even if the sediment particles flow in, the water passage slit 9 is formed.
There is no clogging because it does not stagnate inside. In addition,
The wire rod 8 is not limited to the type as long as it has a triangular cross section, and may be an equilateral triangle, an isosceles triangle, or the like.

The inner pipe 3 has a smaller diameter than the outer pipe 2, but has the same structure as the outer pipe 2, and the lower ring body 6 is welded to the bottom lid 10 and is installed coaxially with the outer pipe 2. Further, the upper ring body 5 of the inner pipe 3 is formed longer than the upper ring body 5 of the outer pipe 2 and protrudes from the upper lid 11, and the water pipe 12 is connected to this protruding portion.

Gravel 4 is filled between the outer pipe 2 and the inner pipe 3, and the size of the gravel is set according to the ground.

In FIG. 5, the water collecting pipe 1 is used for a pumping device for ground water, and the water pipe 1 is connected to the upper ring body 5 of the inner pipe 3.
2 is connected and inserted into the boring hole 14.
The boring hole 14 is drilled to have the same diameter as the outer diameter of the water collecting pipe 1 or a slightly larger diameter than the outer diameter of the water collecting pipe 1, thereby making the outer pipe 2 open.
It can be closely attached to 4a.

Therefore, the efficiency of collecting groundwater can be improved, and the inflow and clogging of sediment from the water collecting slit 9 can be prevented. Further, even if the earth and sand flow in, since the gravel 4 and the inner pipe 3 function as a filter, the earth and sand will not enter the inner pipe 3.

In FIG. 6 (1), the inner tube 3 is replaced by the perforated tube 1
5 is an example showing a water collecting pipe 1 formed in No. 5, and a perforated pipe 1
The holes 15a of No. 5 may be ordinary circular holes in addition to the vertically or horizontally long slits.

Since this water collecting pipe 1 can be formed by inserting the tip of the water pipe 12 having a large number of holes 15a into the outer pipe 2, it is not necessary to separately connect the water pipe 12. You can In this way, even if the inner pipe 3 is the perforated pipe 15, it is possible to achieve the same effect as that of the water collecting pipe 1 formed of the wire rod 8.

Further, the wire rod 8 is not limited to have a triangular cross section, and may have a circular cross section or a trapezoidal cross section as shown in (2) and (3) of FIG.

FIG. 7 is an embodiment showing the water collecting pipe 1 in which the wire rod 8 of the outer pipe 2 is formed with a slight inclination toward the rear end side. The inclination angle of the wire rod 8 is arbitrary and is set according to the outer shape of the ground and the water collection pipe 1. Further, this is not limited to a triangular cross section as shown in (2) of the figure, but may be a trapezoidal cross section.

When the water collecting pipe 1 having such a wire 8 is inserted into the bowling hole 14, the upper part of the wire 8 is
Since the groundwater enters the inside of the adjacent wire rod 8, the groundwater easily flows in, but the sand and sand hardly flow in.

In addition to the above, the water collection pipe 1 includes an outer pipe 2 and an inner pipe 3.
Wire rod 8 of which is inclined toward the rear end side, or the wire rod 8 of the outer tube 2
Is inclined toward the rear end side, but the wire rod 8 of the inner pipe 3 is not inclined, or the wire rod 8 of the outer pipe 2 is not inclined, but the inner pipe 3
The wire rod 8 can be formed by inclining it toward the rear end side.

Further, in the case of the water collecting pipe 1 in which the inner pipe 3 is the perforated pipe 15, the wire rod 8 of the outer pipe 2 can be inclined to the rear end side.

Further, as shown in (2) of FIG.
The water collecting pipe 1 having a circular cross section and the inner pipe 3 formed of a wire rod 8 having a triangular cross section can be formed by inclining the wire rod 8 of the inner pipe 3 toward the rear end side. Further, the wire rod 8 of the outer tube 2 or the inner tube 3 is not limited to the rear end side but can be inclined to the front end side, and its angle can be set arbitrarily.

FIG. 8 is a front view of the water collecting pipe according to claim 2, and FIG.
Is a vertical sectional view of the same. The water collecting pipe 17 is formed by connecting a plurality of water intake pipes 18 in the longitudinal direction by connecting pipes 19.

The water intake pipe 18 has an inner pipe 21 having a smaller diameter than the outer pipe 20, which is inserted into the outer pipe 20 in the same manner as the water collecting pipe 1.
Gravel 22 is filled between the outer pipe 20 and the inner pipe 21.

The outer pipe 20 and the inner pipe 21 of the water intake pipe 18 have the same structure as the outer pipe 2 and the inner pipe 3 of the above-mentioned claim 1, and the upper ring body 23 of the inner pipe 21 from the bottom lid 25, Lower ring 2
4 project from the upper lid 26.

The projecting upper ring member 23 and the adjacent lower ring member 24 are butted against each other via the seal material 27, and the connecting pipe 19 is fitted to this butted portion to connect them.

The wire 29 of the outer tube 20 and the inner tube 21 is
The wire rod 8 of the inner pipe 3 and the outer pipe 2 of the water collection pipe 1 of claim 1 has a triangular cross-section, but the type is not limited as long as it is a triangle, such as an equilateral triangle or an isosceles triangle. May be.

10 and 11 show an embodiment in which the water collecting pipe 17 is attached to the erosion control dam 30, and in this case, the inner pipe 21 of the uppermost water intake pipe 18 is connected through the connecting pipe 19. A water pipe 31 is connected, and this water pipe 31 is embedded in the dam 30a.

The intake pipe 18 is covered with gravel 13 to a suitable thickness, and a block 16 is arranged around the gravel 13 to prevent the gravel 13 from flowing out. Also in this case, the water in the sabo dam 30 is collected by the intake pipe 18 and drained from the water pipe 31.

Further, since the connecting pipe 19 is made of a rubber flexible pipe, the water collecting pipe 17 can be installed more freely, so that the concrete dam can be installed without burdening the concrete dam.

As shown in (1) of FIG. 6, the water intake pipe 18 is such that the outer pipe 20 is a wire rod 29 having a triangular cross section, and the inner pipe 2 is
It is also possible to form 1 by a perforated tube.

Further, as shown in (2) of FIG.
It is also possible to form the wire rod 0 having a circular cross section and the inner tube 21 with a wire rod 29 having a triangular cross section. Further, as shown in (3) of the same figure, the outer pipe 20 and the inner pipe 21 may be formed of wire rods 29 each having a trapezoidal cross section.

Further, as in the above, the outer pipe 20 of the water intake pipe 18 is
Also, the wire rod 29 of the inner pipe 21 may be formed to be slightly inclined toward the rear end side. In this case, the inclination angle of the wire rod 29 is arbitrary and is set according to the ground and the outer shape of the water collection pipe 17.

In addition, in the intake pipe 18, the wire 29 of the outer pipe 20 is inclined toward the rear end side, but the wire 29 of the inner pipe 21 is not inclined, and the wire 29 of the outer pipe 20 is not inclined. It is possible to form the wire rod 29 of the tube 21 that is inclined toward the rear end side. Further, in the case of the water intake pipe 18 in which the inner pipe 21 is a perforated pipe, the wire rod 29 of the outer pipe 20 can be inclined toward the rear end side.

Further, as shown in (2) of FIG. 6, the outer tube 2
The intake pipe 18 in which 0 has a circular cross section and the inner pipe 21 is formed of a wire rod 29 having a triangular cross section can be formed by inclining the wire rod 29 of the inner pipe 21.

Further, the wire rod 29 of the outer pipe 20 or the inner pipe 21 is not limited to the rear end side but can be inclined toward the front end side, and the inclination angle can be set arbitrarily.

[0044]

Since the water collecting pipe can be inserted into the hole while being in close contact with the hole wall, the water collecting efficiency can be improved.

Since the gravel is preliminarily filled between the outer pipe and the inner pipe, it is possible to save the trouble of separately filling the outer circumference of the water collecting pipe with the gravel.

The water collected from the outer pipe passes through the gravel and is pumped up from the inner pipe, so that the gravel serves as a filter.

Since a plurality of water intake pipes are connected in the longitudinal direction, the water collecting effect can be enhanced.

By forming the outer pipe with a wire having a triangular or trapezoidal cross section, a water passage slit having a narrow ground side and a wide inner side is formed between these wire rods, so that sediment particles do not easily flow in. . Further, even if it flows in, it will not be clogged inside the water passage slit, so that it will not be clogged.

Since the wire rod of the outer pipe or the inner pipe has a triangular cross-section or a trapezoidal cross-section and the outer surface is inclined in the longitudinal direction, the upper part of the wire rod comes into the inside of the adjacent wire rod, so that the groundwater easily flows in. However, it becomes difficult for the sediment to flow in.

Since the connecting pipe is a flexible pipe, the degree of freedom in installing the water collecting pipe can be greatly expanded.

[Brief description of drawings]

FIG. 1 is a front view of a water collection pipe in which an outer pipe is partially omitted.

FIG. 2 is a vertical sectional view of a water collecting pipe.

FIG. 3 is a cross-sectional view of a water collection pipe.

FIG. 4 is an enlarged cross-sectional view of a wire rod.

FIG. 5 is a cross-sectional view in which a water pipe is connected to the water collection pipe and is installed in the ground.

6 (1), (2), and (3) are partially omitted cross-sectional views of a water collecting pipe showing another embodiment.

7 (1) and (2) are cross-sectional views in which a part of the water collecting pipe in which the wire rod of the outer pipe is inclined are omitted.

FIG. 8 is a front view of a water collection pipe formed by connecting the water intake pipes in the longitudinal direction.

FIG. 9 is a cross-sectional view of a connection portion of an intake pipe.

FIG. 10 is a cross-sectional view of a sabo dam to which a water collecting pipe is attached.

FIG. 11 is a plan view of a sabo dam to which a water collecting pipe is attached.

FIG. 12 is a cross-sectional view of a conventional water collecting device.

[Explanation of symbols]

 1, 17 Water collection pipe 2, 20 Outer pipe 3, 21 Inner pipe 4, 4, 13, 22 Gravel 5, 23 Upper ring body 6, 24 Lower ring body 7 Core material 8, 29 Wire rod 9 Water passing slit 10, 25 Bottom lid 11, 26 Upper lid 12, 31 Water pipe

Claims (8)

[Claims] 1. A core in which an inner pipe having a diameter smaller than that of the outer pipe is inserted, gravel is filled between the outer pipe and the inner pipe, and the outer pipe and the inner pipe are circularly arranged at appropriate intervals. A water collecting pipe, which is formed by winding a wire around a material with a slight gap. 2. An inner pipe having a smaller diameter than the outer pipe is inserted into the outer pipe, gravel is filled between the outer pipe and the inner pipe to form an intake pipe, and the intake pipe is longitudinally connected via a connecting pipe. A plurality of the above-mentioned outer pipes and inner pipes are connected to each other, and the outer pipe and the inner pipe are formed in such a manner that a wire is wound around a core material arranged in a circular shape with a proper gap and a slight gap. 3. The water collection pipe according to claim 1 or 2, wherein the wire has a triangular shape, a circular shape, or a trapezoidal shape in cross section. 4. The water pipe according to claim 1, wherein the wire has a triangular cross section or a trapezoidal cross section, and an outer surface of the wire is wound while being inclined in the longitudinal direction. 5. The water collecting pipe according to claim 1, 2, 3, or 4, wherein the inner pipe is a perforated pipe. 6. The water collecting pipe according to claim 1, wherein a water pipe is connected to the inner pipe. 7. The water collecting pipe according to claim 2, 3, or 4, wherein a water pipe is connected to an innermost pipe of the water intake pipe through a connecting pipe. 8. The water collecting pipe according to claim 2, wherein the connecting pipe is a flexible pipe.