JPS6141824Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to underground rainwater drainage pipes.

In urban areas where roads are often paved, rainwater does not penetrate underground, making rivers more prone to flooding. For this purpose, rainwater basins are installed in appropriate places, rainwater is allowed to flow into the rainwater basins from side ditches on the ground surface, foreign matter such as garbage and sand settles to the bottom of the rainwater basins, and then the rainwater is drained into the sandy gravel layer deep underground. Rainwater drainage systems that allow rainwater to naturally drain into underground drainage pipes for underground infiltration have come into practical use.

However, the foreign objects mentioned above include pieces of wood, pieces of vinyl, etc.
In addition, since there are floating foreign substances such as fine sand, there is a risk that these floating foreign substances may flow into the underground rainwater drain pipes with rainwater and cause blockages in the lower part of the pipes.
Although a filter is provided to prevent this, there is a problem in that a high wastewater treatment capacity cannot be obtained when a filter is provided.

The present invention was developed in view of the above-mentioned conventional problems, and provides an underground rainwater drainage pipe with high rainwater drainage processing capacity by using a cylindrical filter as a spout filter to remove foreign matter. The purpose is to

An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, 1 is the surface layer, 2 is the deep underground gravel layer, 3 is the side ditch, 4 is the rainwater basin, and 5
is an underground rainwater drainage pipe. This rainwater underground drainage pipe includes a control pipe 51, a water intake pipe 52, and a filter storage pipe 5.
3 and a perforated infiltration pipe 54 are sequentially connected vertically, the upper end is opened to the ground surface, and the lower end is connected to the gravel layer 2.
It is buried underground with an opening at a predetermined depth. The upper end of the regulating pipe 51 penetrates the ground layer 1 and opens onto the ground surface, and is normally closed with a cap 55.
The water intake pipe 52 has a horizontal pipe shape with a horizontal pipe 52A,
A water intake port 52a with an enlarged diameter of the horizontal pipe 52A penetrates the side wall 41 of the rainwater basin 4 and opens into the interior 42 of the rainwater basin 4. A spout filter 4 is installed at the water intake 52a.
3 is installed.

This spout filter 43 has a cylindrical body 4 made of synthetic resin.
4, the mesh member 45 closes a plurality of holes 44a formed in the side wall of the cylindrical body 44 and one end of the cylindrical body 44b to form a filter portion. The other end of the cylindrical body 44 is closed by an end wall 46 having a plurality of water holes 46a, and the outer peripheral portion of the end wall 46 forms a seal portion 46b shaped like a flange against the cylindrical body 44. This seal part 4
Three positioning legs 47 radially extending in a radial direction at positions separated from 6b by a predetermined distance in the axial direction.
is provided. The spout filter 43 is inserted into the horizontal pipe 52A of the water intake pipe 52 from the sealing part 46a side until the three legs 47 engage with the steps of the water intake port 52a of the water intake pipe 52, and the gap between the water intake pipe 52 and the horizontal pipe 52A is A rainwater inflow channel A is defined. The seal portion 46a is connected to the horizontal pipe 52.
A and the cylindrical body 44 are sealed watertightly.

The upper and lower ends of the filter storage pipe 53 are inserted into the lower end socket 52b of the water intake pipe 52 and the upper end socket 54a of the permeation pipe 54, respectively, and a bottomed cylindrical filter 60 is housed therein. This cylindrical filter 60 has a hook part 60a and a flange-like support part 60b at the upper end, and this support part 60b has a lower end socket 5 of the water intake pipe 52.
It is hung and supported by the filter storage pipe 53 by being hooked onto a support ring 70 fixedly installed inside the filter storage pipe 2b.

The cylindrical filter 60 has a perforated tube 61 having an outer diameter smaller than the inner diameter of the filter storage tube 53, and a filter body 62 made of a net-like body that is thinner than the perforated tube 61 and is provided so as to cover the inner peripheral surface of the perforated tube 61. A rainwater flow path B is formed between the filter storage pipe 53 and the filter storage pipe 53.

In this configuration, rainwater R that has fallen on the ground enters the rainwater tank 4 from the side gutter 3, and passes through the spout filter 43,
The rainwater flows through the water intake pipe 52 into the cylindrical filter 60 in the underground drainage pipe 5 . Foreign matter that does not settle in the rainwater basin 4 is removed by one end of the spout filter 43 and the filter portion on the peripheral surface. Rainwater R is filtered at the mouth filter 43
It flows into the spout filter 43 through the mesh member 45, and flows into the water intake pipe 52 from the water passage hole 46a. The minute foreign matter that has passed through the spout filter 43 is captured by the cylindrical filter 60, and only the rainwater R passes through the cylindrical filter 60 and flows down from the rainwater flow path A to the infiltration pipe 54, and is filtered through the numerous infiltration holes 54b into sand and gravel. Effluent penetrates into layer 2.

The spout filter 43 of this embodiment has a cylindrical shape and has a filter portion on the circumferential surface, and defines a gap A leading to the rainwater basin 4 between it and the horizontal pipe 52A, so the filter area is large and the filter area is large. High ability.

In addition, since there is a positioning leg 47, the spout filter 43 is simply inserted into the horizontal pipe 52A, and is held in the horizontal pipe 52A without being able to move in the axial direction under the pressure of rainwater, and the sealing part 46b and the leg Due to the action of the portion 47, it is supported horizontally within the horizontal tube 52A. Further, the spout filter 43 can be pulled out for cleaning.

As described above, according to the present invention, by using a cylindrical spout filter to remove relatively large foreign substances, the water passing capacity of the spout filter is large, so that the rainwater treatment capacity is high. Rainwater underground drains can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of an embodiment of the rainwater underground drainage pipe according to the present invention, Fig. 2 A is a view from A-A in Fig. 1, and Fig. 2 B is a view from B-B in Fig. 1. . 4... Rainwater mass, 5... Adjustment pipe, 43... Spout filter, 44... Cylindrical body, 44a... Hole, 45...
...Mesh member, 46... End wall, 46a... Seal part, 47... Leg part, 52... Water intake pipe, 52A...
...Horizontal pipe, 52a...Water intake, 53...Filter storage pipe, 54: Penetration pipe, 54b: Penetration hole.

Claims (1)

[Scope of utility model registration request] In underground rainwater drainage pipes, which are buried vertically in the ground with the upper end opened above the ground surface and equipped with horizontal pipes that have numerous infiltration holes in the lower peripheral wall and open into rainwater masses below the ground surface, there is a flange on one end side. A cylindrical spout filter having a shaped seal portion and radial positioning legs is removably inserted into the horizontal pipe with a radial gap defined therein. Underground drain pipe.