JP3634042B2 - Rainwater penetration - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rainwater permeation device installed in a residential land, a sidewalk, a roadway, or the like.
[0002]
[Prior art]
In recent years, with the promotion of urbanization, the increase in the roof area of buildings and the paving of roads impeded the penetration of rainwater into the soil, and the runoff of rainwater increased dramatically, and the problem of river flooding was regarded as important. ing. In addition, it is regarded as a problem in terms of the natural environment, such as the loss of reclaimed water due to the depletion of groundwater.
[0003]
As part of measures to eliminate the above-mentioned problems, rainwater penetration that allows rainwater to penetrate into the ground has been gaining attention in order to prevent outflow of rainwater and recharge groundwater.
As an example of this rainwater permeation masu, there is a rainwater permeation mushroom described in Japanese Utility Model Publication No. 5-42382.
This rainwater infiltration maser structure has a main body in which a mud reservoir having a large number of drain holes is formed, a mud receiver having a large number of drain holes accommodated in the main body, and an interior of the mud receiver. Filter bag.
[0004]
[Problems to be solved by the invention]
However, in the case of rainwater permeation described in the above-mentioned Japanese Utility Model Publication No. 5-42382, the structure is considered to allow the permeation of mud reservoir and drained rainwater into the surrounding ground at the same time. Since the mud and dirt contained in the rainwater also flow into the ground through the drainage holes that allow the rainwater to penetrate into the ground, the infiltration path of the rainwater in the surrounding soil is clogged, and the infiltration performance of the rainwater is reduced. There is a problem that it decreases with time, that is, it is not expected to maintain long-term penetration performance of rainwater into the ground.
[0005]
The present invention has been made with the above problems in mind, and the object of the present invention is to eliminate these problems and maintain long-term penetration performance of rainwater into the ground. It provides the expected rainwater penetration.
[0006]
[Means for Solving the Problems]
In the rainwater infiltration masu of the present invention, a rainwater inflow side connection portion is provided on the peripheral wall portion of the bottomed main body, and a rainwater outflow side connection portion is provided on the peripheral wall portion facing the inflow side connection portion. A mud pool with a large number of drain holes is formed on the lower peripheral wall of both connecting parts of the main body, and a bottomed inner cage with a number of drain holes on the peripheral wall can be taken in and out from the upper side of the main body. In the rainwater infiltration pier that is inserted through the main body, the diameter of the drainage hole of the main body and the drainage hole of the inner basket is small on the lower side, and gradually increases as it goes upward. The drain hole is characterized in that the lower side is disposed at a position shifted from each other, and the upper side is disposed at a position where they overlap.
[0007]
[Action]
In the rainwater permeation tank of the present invention, the diameter of the drainage hole of the main body and the drainage hole of the inner basket is smaller on the lower side and gradually increases toward the upper side. Since the lower side is arranged at a position shifted from each other and the upper side is arranged at the overlapping position, mud and debris that flowed in along with rainwater are blocked by the inner wall of the inner cage and the main body of the fence and directly It becomes difficult to be discharged inside.
Therefore, mud and debris are collected almost certainly in the lower part of the mud reservoir of the main body, and the supernatant water is discharged into the ground without resistance from the large drainage hole that matches the upper main body and the inner cage. Therefore, clogging of the underground drainage route is greatly improved, and it is possible to maintain long-term penetration performance of rainwater into the ground.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments will be described below with reference to the drawings.
FIG. 1 is a half sectional view and a half side view showing an example of a rainwater permeating apparatus according to the present invention.
In FIG. 1, a rainwater infiltration mast 10 is connected to a rainwater inflow side connecting portion 2 on a peripheral wall portion 11 above a bottomed main body 1 and a rainwater outflow side connection to a peripheral wall portion 11 facing the inflow side connecting portion 2. The structure is provided with the portion 3.
The main body 1 is composed of an upper main body 1a and a bottomed cylindrical lower main body 1b, and has a structure in which a mud reservoir 12 is formed near the lower side of the lower main body 1b.
[0009]
A large number of drain holes 11 a, 11 a,... Are provided in the peripheral wall of the mud reservoir 12.
Further, a bottomed inner car 4 is provided inside the main body 1 so as to be inserted into and removed from an opening 13 for a manhole cover (not shown) above the main body 1. A number of drain holes 4a, 4a,... Are provided on the lower side of the peripheral wall.
[0010]
The drain holes 11a, 11a,... Of the mud reservoir 12 of the main body 1 and the drain holes 4a, 4a,... Of the inner cage 4 are small on the lower side and gradually increased toward the upper side. ing.
[0011]
Further, the drain holes 11a, 11a,... Of the main body 1 and the drain holes 4a, 4a,... Of the inner car 4 are arranged in a staggered manner at positions where the lower sides are shifted from each other, and the upper sides overlap. It is arranged to come to the position.
That is, the drain holes 11a, 11a, ... and the drain holes 4a, 4a, ... of the inner cage 4 have a layout as shown in the plan view of FIG.
FIG. 2 is a plan view of the mud reservoir 12 viewed from the inside. In the plan view, the front side is the peripheral wall of the inner cage 4 and the other side is the peripheral wall of the main body 1.
In the figure, the upper half of the mud reservoir 12 is a rainwater infiltration part A, and the lower half is a mud or dust accumulation part B.
[0013]
In the permeation part A, the drain holes 11a, 11a,... Arranged in a staggered manner coincide with the drain holes 4a, 4a,. The diameter gradually decreases.
Moreover, in the accumulation | storage part B of a lower half part, the drain holes 11a, 11a, ... arrange | positioned in zigzag form, and the drain holes 4a, 4a, ... of the inner cage | basket | car 4 are in the position mutually shifted | deviated. It is disposed and its diameter gradually decreases as it goes downward.
[0014]
The size of the drain holes 4a and 11a can be arbitrarily set in the range of about 1 mm to about 20 mm.
[0015]
In addition, a rectifying plate 1c is provided at the center of the main body 1 in a direction orthogonal to the inflow side connection portion 2 and the outflow side connection portion 3 to prevent mixed flow and turbulent flow of inflow water and outflow water. So that it is considered.
[0016]
As described above, in the rainwater infiltration mast 10 of the present invention, the diameter of the drain holes 11a, 11a,... Of the main body 1 and the drain holes 4a, 4a,. Since it is small and increases as it goes upward, mud and debris mixed in the rainwater are discharged from the drain holes 4a, 4a,... It is difficult to deposit in the lower part.
[0017]
Further, the drain holes 11a, 11a,... Of the main body 1 and the drain holes 4a, 4a,. Since the upper penetrating part A is overlapped in a staggered manner, mud and debris that flows in along with the rainwater is blocked by the inner car 4 and the peripheral wall of the main body 1 and directly into the ground. Without being discharged to the inside, the inner cage 4 and at least the mud reservoir 12 of the main body 1 are retained, and the discharge of mud and garbage into the ground is drastically reduced.
[0018]
Therefore, more and more mud and dust are surely accumulated in the accumulation portion B below the mud reservoir portion 12 of the main body 1, and the supernatant water is located at a position where the main body 1 and the inner basket 4 of the upper permeation portion A coincide with each other. It is possible to pass through the drain holes 11a, 11a, ... and the drain holes 4a, 4a, ... without resistance and to be discharged into the ground.
[0019]
【The invention's effect】
In the rainwater permeation tank of the present invention, the diameter of the drainage hole of the main body and the drainage hole of the inner basket is smaller on the lower side and gradually increases toward the upper side. Since the lower side is arranged at a position shifted from each other and the upper side is arranged at the overlapping position, mud and debris discharged together with rainwater from the small drain hole below the inner cage is directly discharged into the ground Without being disturbed, it is interfered with the peripheral wall of the main body and stays in the mud pool of the outer main body, and the discharge of mud and debris into the ground is drastically reduced. Therefore, mud and debris are surely accumulated in the lower part of the mud reservoir of the main body, and the supernatant water is discharged into the ground without resistance from the large drainage hole that matches the upper main body and the inner cage. The clogging of the underground drainage route is greatly improved, and it is possible to maintain the long-term penetration performance of rainwater into the ground.
Therefore, it is preferably used as a rainwater permeating apparatus.
[Brief description of the drawings]
FIG. 1 is a half sectional view and a half side view showing an example of a rainwater permeating apparatus according to the present invention.
FIG. 2 is a plan development view of a mud reservoir.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 1a Upper side body 1b Lower side main body 1c Opening 2 Inflow side connection part 3 Outflow side connection part 4 Inner basket 4a, 11a Drain hole 12 Mud storage part 13 Opening 11 Frangoon part 11a 框 11b Drooping piece 2 Washing place 21 Upright part 21a First horizontal piece 21b Upright piece 21c Second horizontal part 3, 5 Filler 4 Protective material A Infiltration part B Accumulation part

Claims (1)

A rainwater inflow side connection part is provided on the peripheral wall part of the bottomed main body, and a rainwater outflow side connection part is provided on the peripheral wall part opposite to the inflow side connection part. A mud reservoir having a large number of drain holes is formed in the peripheral wall, and a bottomed inner cage having a large number of drain holes in the peripheral wall is inserted inside the main body so that it can be inserted and removed from the upper opening. In the rainwater infiltration, the diameter of the drainage hole of the main body and the drainage hole of the inner cage is small on the lower side and gradually increases as it goes upward, and the drainage hole of the main body and the drainage hole of the inner cage are Rainwater permeation is characterized by the fact that the sides are arranged at positions that are offset from each other, and the upper side is arranged at a position that overlaps.

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