JPS636293Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of application of the invention] This invention was first applied for in 1981, when the patent application
This is a simplified version of the No. 182119 "Octopus-type rainwater filtration device," which primarily filters rainwater excluding industrial water, pollution-contaminated water, etc., without directly discharging it into sewers, rivers, etc. This invention relates to a rectangular rainwater treatment tank with a filtration device that allows only purified water to permeate or pour out underground, or to be discharged into a general sewer system through connecting piping.

[Background of the idea and its problems]

Normally, rainwater is treated by discharging it directly into underground sewers.

However, once heavy rains or typhoons hit, people's homes are flooded, roads are flooded, and other serious damage continues to occur, so there is a great need to consider fundamental improvement measures in flood control projects. For this reason, even if sewage facilities are expanded through the extensive development of existing sewage systems and the expansion of new facilities due to the urbanization trend, definitive measures for rainwater treatment during typhoons or heavy rainfall have still not been established. Not yet.

Current causes of rainwater overflow include the fact that most of the roads have been hardened with asphalt, and the streams and other waterways used by many transport ships have been filled in and converted into automobile roads. It is said to be a remote cause, and also due to the donut phenomenon of cities,
Cultivated land, which used to be a natural reservoir in rural areas, is being turned into residential land and at the same time roads are being paved with concrete, and as a result, the amount of water seeping underground is decreasing year by year.

[Means for solving problems]

In view of the above reasons, the present invention was developed as a result of intensive research in order to purify and reuse the large amount of rainwater that flows in.As a result, we completed a filtration device that is suspended in the air. This is the invention of the filtration treatment tank. In other words, the rainwater related to this invention is
It is not polluted water found in various types of industrial wastewater, etc., and contains almost no impurities. Therefore, the percolation of filtered rainwater underground can greatly contribute to the use of water resources, and it also improves the use of groundwater. A meaningful natural action that prevents ground subsidence due to over-pumping,
Furthermore, the frequency of maintenance can be reduced due to the reduction of sludge in the sewerage system, and in this way, the present invention provides a rainwater filtration treatment tank that accurately purifies rainwater and is highly rational.

[Preferred embodiment]

An embodiment of the present invention that achieves the above object will be described with reference to the drawings.

Figure 1 is a schematic vertical cross-sectional view from the front side, illustrating the gist of the rectangular rainwater treatment tank with a filtration device according to the present invention for easy understanding. In the plan view, the three circles are lids that are opened during maintenance. FIG. 3 is a schematic vertical cross-sectional view showing the gist as seen from the side.

The present invention is an integrated organic lid tank 1 in the shape of a solid square box with a bottom that is buried underground. An inlet for rainwater is provided at the upper end portion, and an inlet pipe 2 is attached thereto, and a large number of small holes 3 are bored at the bottom portion of the tank 1 for draining the rainwater into the ground. On the opposite side of the inlet, a partition wall 4 is formed that hangs down perpendicularly from the integral box-shaped ceiling and maintains an appropriate space between it and the bottom, so as to create a slightly wider empty room, and the surrounding area is hollowed out. Rainwater tank 8
In addition, the lower end side grating 6 of the partition wall 4 formed with an appropriate width between it and the inner bottom surface is attached horizontally to provide a suspended chamber with space on the sides and below, A filter made of a suitable material is placed on the grating to form a filtration device 5 in the chamber, and a perforated pipe with a suitable diameter with a large number of holes bored in the wall of the upper part of the chamber. , or a drain pipe 7 is fitted to constitute the present invention, and rainwater flowing in from the introduction pipe 2 fitted to the introduction port once flows into the hollow water tank 8 in the tank. As the water level gradually rises, the rainwater completely rises and infiltrates from the bottom surface of the horizontal grating 6 and the filter device 5 installed above, thereby ensuring that various impurities are not mixed in. The perforated pipe 7 is fitted in the upper part of the chamber so that only the purified water that has passed through the filter while being blocked is inserted into the upper part of the chamber.
It can be poured into the ground and returned to the ground without clogging.
Alternatively, it is characterized in that it is configured so that it can be connected to a drain pipe 7 and discharged into any sewer system.

[Characteristics of the composition and effects of the invention]

However, in this rainwater treatment tank, rainwater that flows into the tank 1 through the introduction pipe 2 is stored in the hollow water tank 8, and as the water level in the water tank 8 gradually rises, By configuring a means for water to rise and infiltrate from the grating 6 horizontally attached to the lower base of the partition wall 4 to the filtration device 5 located further above, impurities do not pass through the filter.
Since it falls through the water according to the natural and physical law of gravity, there is no possibility that the filter device 5 will become clogged. Therefore, the frequency of maintenance of the filter is greatly reduced, and when replacing the filter, it is only necessary to focus on the bottom layer, and the impurities accumulated at the inner bottom of the water tank 8 can be removed using the circular lid shown in the plan view of FIG. A large number of small holes 3 are provided in the lower part of the tank so that it can be opened and removed easily by vacuum suction, etc., and also to prevent the breeding of black flies and the generation of odors from the accumulated water remaining at the bottom of the tank. It also maintains the ability to quickly seep into the ground. Therefore, only the rainwater that has passed upward through the filtration device 5 and been purified is allowed to permeate into the ground through the perforated pipe 7 fitted into the tank wall above the device, or through the drain pipe 7, or through an arbitrary method. It can be discharged into the sewer system.

As described above, the present invention can reliably eliminate the clogging of the perforated pipe 7 that pours into the ground, which has been a major impediment to the return of rainwater resources underground, where water purification is easy. This invention can make a significant contribution and produce significant practical effects, such as by minimizing the amount of sludge that accumulates, in conjunction with the reuse of rainwater resources.

[Brief explanation of the drawing]

Figure 1 is a schematic vertical cross-sectional view from the front side, illustrating the gist of the rectangular rainwater treatment tank with a filtration device according to the present invention for easy understanding. In the plan view, the three circles are lids that are opened during maintenance. FIG. 3 is a schematic vertical cross-sectional view showing the gist as seen from the side. 1... Square box tank, 2... Rainwater introduction pipe, 3...
Numerous small holes for underground pouring provided in the lower part of the tank, 4...
Partition wall, 5... Filtration device, 6... Grating, 7
... Porous pipe or drain pipe, 8... Water tank.

Claims (1)

[Scope of Claim for Utility Model Registration] An integrated covered tank in the shape of a sturdy rectangular box with a bottom that is buried underground, with a rainwater inlet at the top end and an inlet pipe attached. Furthermore, a large number of small holes are drilled at the bottom of the tank for seepage and drainage into the ground, and a slightly wider space is created inside the tank, so that it is perpendicular to the integrated box-shaped canopy. The partition wall is formed by forming a partition wall that descends from the bottom and maintains an appropriate space between it and the bottom surface, forming a hollow rainwater storage tank around the partition wall, and in addition, the partition wall is formed with an appropriate width between it and the inner bottom surface. A grating is horizontally attached to the lower edge of the chamber to form a chamber having spaces on the outside and below, and a filter made of a suitable material is placed on the grating to form a filtration device in the chamber. Furthermore, a perforated pipe or water pipe with a large number of holes is fitted in the upper wall of the chamber, and the rainwater flowing in from the inlet is temporarily transferred to the hollow water tank in the tank. As the water level gradually rises inside the chamber, the water rises from below the filtration device, preventing the contamination of various impurities and allowing only the purified water that has passed through the filter to rise to the top of the chamber. A rectangular rainwater treatment tank with a filtration device, characterized in that the water can be discharged into the ground through the perforated pipe fitted in the tank, or can be discharged into the sewer by connecting a drainage pipe.