JPH08170359A - Earth and sand filter device - Google Patents

Abstract

PURPOSE: To prevent the outflow of earth and sand together with rain water in a river when rain falls on developed lends such as mountainous district cut down trees, fields, golf links, etc., and to reserve ground water. CONSTITUTION: A rain water inflow pipe 5 is provided on one side wall 1a of a filter basin 1 covered with a perforated steel plate cover 2 capable of being loaded and unloaded on the upper part thereof, and a rain water outflow pipe 6 is provided on the other side wall 1b. One filter member 3 is erected inside the filter basin leaving space, the other filter member 4 suspended to the lower surface of the perforated steel plate 2 is made to lie in the space of one filter member 3, and a rain water passage is formed of one filter member 3 and the other filter member 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device for preventing sediment inflow and sedimentation into a rainwater underground infiltration basin (chamber system).

[0002]

2. Description of the Related Art Usually, rain that falls in a mountain field passes through trees, falls on the ground, and penetrates into the ground. However, due to the development of vegetation without trees, the rainwater that lost its place while the rain fell in the area where the number of trees was reduced and the ground was covered with concrete, the wilderness, the open space, such as the golf course, did not penetrate into the soil , Along with the earth and sand flows from a high place to a low place and flows into a river, and stagnates on a flat land to form a water pool. Conventionally, various measures have been studied and countermeasures have been established as a means for preventing pollution of rivers due to these phenomena, prevention of subsidence in urban areas, and prevention of sudden increase in water flow in rivers due to heavy rain.

For example, as an example of a drainage filter, US Pat. No. 5,087,151 discloses an infiltration basin. In this device, a plurality of seepage pits having stepwise flow paths are arranged in a row in the direction of rainwater flow and embedded in the ground to cause the rainwater to soak into the ground. However, it is unavoidable that the sediment along with the rainwater that penetrates into the ground flows into the infiltration basin.

Therefore, in a short period of time, the infiltration basin is clogged with soil and the circulation of rainwater is obstructed and blocked, and the purpose cannot be achieved. Therefore, the infiltration basin is dug up and washed. The clogged earth and sand must be washed away and put back into the soil again for laying. Repeating this work within a short period of time is extremely difficult work for the construction of the Yamano Golf Course having a vast installation area, or for the maintenance work of the constructed land, and has a drawback that is practically impossible.

[0005]

SUMMARY OF THE INVENTION In order to eliminate the conventional drawbacks, the present invention separates sediment from rainwater containing sediment flowing into the infiltration basin to efficiently deposit only rainwater into the soil for a long period of time. The purpose is to infiltrate and secure groundwater, prevent pollution of rivers by sediment flowing out with rainwater, prevent ground subsidence in urban areas, and provide means to mitigate rapid flooding of rivers due to heavy rain. And

[0006]

Means for Solving the Problems In order to solve the above problems, the present invention is directed to a filter rod installed to prevent sediment inflow and sedimentation into a rainwater infiltration basin. An inflow pipe and a rainwater drainage pipe are provided respectively, and one filter for depositing inflowing sediment along with rainwater in a direction perpendicular or oblique to the flow direction of rainwater from the rainwater inflow pipe to the rainwater drainage pipe. A member is projected on the inner bottom of the filter barrel, and a perforated steel plate lid is hung on the upper edge of the filter barrel so that the other filter member is alternately arranged with one of the filter members in the filter barrel. It was put on, and the steel plate lid installed on the top of the filter rod was provided with a hole for introducing rainwater into the filter rod, and was installed on the top of the filter rod. Filter member hung on the back surface of the plate lid and is provided in attached removable to the steel plate lid.

[0007]

According to the present invention, a rainwater flow pipe and a rainwater drainage pipe are provided in a filter device for preventing sediment inflow and accumulation into a rainwater underground infiltration basin and preventing reduction of the infiltration effect, and a space is provided on the bottom wall of the filter basin. Rainwater mixed with sand and sand is passed through a zigzag passage between one filter member that is erected upright and the other filter member that is attached to the lower surface of the perforated steel plate lid provided on the upper surface of the filter rod.

As a result, the sediment in the rainwater mixed with the sediment which has flowed into the filter rod through the rainwater inflow pipe is filtered in the zigzag passage between the one filter and the other filter, and is deposited on the inner bottom portion of the filter rod. To be done.
The rainwater from which the sediment has been separated and removed is guided by the rainwater drainage pipe and enters the rainwater infiltration basin. In this way, the sediment in the rainwater is blocked by the filter basin before entering the rainwater infiltration basin, so the reduction of the rainwater infiltration effect in the rainwater infiltration basin is avoided, and the securing of groundwater and river It is possible to prevent soil pollution and prevent land subsidence, and to reduce sudden flooding of rivers due to heavy rain.

[0009]

1 and 2 are a front view and a separated perspective view of a device of the present invention. 1 is a concrete filter rod,
Alternatively, a steel filter rod, 2 is a perforated steel plate lid that covers the upper edge of the filter rod 1, and 3 is one filter that is erected in parallel on the inner bottom of the filter rod 1 with an appropriate interval. The members 4 are the other filter members that are attached to the lower surface of the steel plate lid 2 and hung side by side in a detachable manner, and are arranged so as to be interposed in the gap between the one filter member 3.

Reference numeral 5 is a rainwater inflow pipe provided on one side wall 1a of the filter rod 1, and 6 is a rainwater outflow pipe provided on the other side wall 1b of the filter rod 1, which is connected to a rainwater infiltration rod (not shown). Rainwater is rainwater inflow pipe 5 and hole 2a of perforated steel plate lid 20.
When it further enters the filter container 1, it is stored between the one filter member 3 and the other filter member 4.

Since the rainwater inflow pipe 5 is arranged above the upper edge of the one filter member 3 and the rainwater outflow pipe 6 is arranged below the upper edge of the one filter member 3, the filter rod 1 Rainwater stored in the
It is led out to the outside of the filter rod 1 from the rainwater outflow pipe 6 through the upper edge and the lower edge of the other filter member 4.

While the rainwater containing sediment passes through the one filter member 3 and the other filter member 4, the sediment contained in the rainwater is filtered and settled by the filter members 3 and 4, and only the rainwater above is collected. Will be led out from the rainwater outflow pipe 6, and will flow into the rainwater infiltration basin (not shown) connected to the rainwater outflow pipe 6.

One filter 3 and the other filter 4
The eyes are finely formed from one side wall 1a to the other side wall 1b. To attach the other filter 4 to the steel plate lid 2, a known means such as a fitting type or a screw type is used. Reference numerals 7 and 7 ′ are stop angles provided on the lower surfaces of both sides of the steel plate lid 2, and when the steel plate cover 2 is put on the filter barrel 1, the stop angles 7 and 7 ′ are provided on both side walls 1 a and 1 b in the filter rod 1. Fit inside so that the steel plate lid does not shift. When sediment is deposited in the filter vessel 1 as a result of use, the steel plate lid is opened every 2-3 years to discharge the soil from the filter vessel.

The filter rod may have a box shape, an arch shape, a cylindrical shape, or the like depending on the place of use. The volume is, for example, 2 to 4 m in width and 0.5 to 1 m in height,
The depth is 1-2 m. The hole formed in the perforated steel plate lid 2 is formed so that a large amount of earth and sand does not flow into the concrete filter container. Further, as the material of the filter container, a polyethylene material having a high molecular density and a high density can be used depending on the installation location.

The mesh of the one filter 3 and the other filter 4 can be formed to be rough on the rainwater inflow pipe side and finer on the rainwater outflow pipe side in order to improve the filtration efficiency.

[0016]

As described above, according to the present invention, by covering the filter rod with the perforated steel plate lid, the rainwater flowing through the ground 9 flows into the filter rod together with the finely sorted fine sand, and the heavy sand is removed from the filter rod. Only the rainwater that settles on the inner bottom can pass through the gap between the one filter member and the other filter member and can be guided to the rainwater underground infiltration basin through the rainwater outflow pipe, and the sediment deposited in the filter basin is a hole. The perforated steel plate lid can be removed from the filter box.

At this time, the soil adhered to the one filter member and the other filter member can be washed off, and the perforated steel plate lid can be fitted over the filter basin using the stop angle as a guide, so that the standing tree is felled. By laying the rainwater underground infiltration basin in the mountain and the development area, it is possible to prevent the rainfall from flowing out into the river along with the sediment, and to promote the storage of groundwater.

[Brief description of drawings]

FIG. 1 is an exploded front view showing a filter barrel and a steel plate lid.

FIG. 2 is a perspective view showing a filter barrel and a steel plate lid in a disassembled state.

[Explanation of symbols]

 1 Filter Mouth 1a One Side Wall of Filter Mouth 1b Other Side Wall of Filter Mouth 2 Perforated Steel Plate Lid 2a Hole in Perforated Steel Plate Lid 3 One Filter Member 4 Other Filter Member 5 Rainwater Inflow Pipe 6 Rainwater Outflow Pipe 7, 7 Stop Angle

Claims (4)

[Claims] 1. In a filter rod installed to prevent sediment inflow and accumulation into a rainwater infiltration basin, rainwater inflow pipes and rainwater drainage pipes are provided on one side wall and the other side wall of the filter rod, respectively, and rainwater from the rainwater inflow pipe is provided. One of the filter members for accumulating inflowing earth and sand together with rainwater in the direction perpendicular or oblique to the direction of flow of rainwater to the drainage pipe is projected on the inner bottom of the filter rod. A filter device for preventing inflow of earth and sand, wherein an upper edge portion is covered with a perforated steel plate lid in which the other filter member is suspended so as to be alternately arranged with one filter member in the filter barrel. 2. The sediment inflow prevention filter device for a rainwater infiltration basin according to claim 1, wherein a hole for introducing rainwater into the filter basin is provided in a steel plate lid installed on the upper part of the filter basin. 3. The rainwater underground according to claim 1 or 2, wherein the filter member hung on the back surface of the steel plate lid installed on the upper part of the filter rod is detachably attached to the steel plate lid. A filter device for preventing the inflow of sediment from a seepage pit. 4. The mesh of one filter member and the other filter member is formed so that the rainwater inflow pipe side is coarse and the rainwater outflow pipe side is fine. The sediment inflow prevention filter device according to 3.