JPH0852306A - Filter - Google Patents

Abstract

PURPOSE:To prevent clogging of a water-passing layer and to clarify water very simply by forming a part or the whole part of the water-passing layer provided in the bottom part of a water storage tank into an oblique water-passing layer which is tilted downward from a water conveyance part to the other side of the water storage tank. CONSTITUTION:A water conveyance part 1 is provided in the upper part at one side of a water storage tank 2. A water-passing layer 4 is provided by laying a suitable member such as sand and gravel in the base part of the water storage tank 2. A part or the whole part of the water-passing layer 4 is formed into an oblique water- passing layer 4' which is tilted downward from the water conveyance part 1 to the other side of the water storage tank 2. A drainage part is provided in the water storage tank 2 to discharge seepage water penetrated into the water-passing layer 4 to the outside of the water storage tank 2 through the drainage part. Water sent from the water conveyance part 1 flows down on the oblique water-passing layer 4' of the water storage tank 2 and is penetrated into the water-passing layer 4, filtrated and discharged from the drainage part to the outside of the water storage tank 2. In this case, impurities accumulated on the oblique water-passing layer 4' are washed away downward by flow down of water thereon and clogging of the oblique water- passing layer 4' is not caused.

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 purifying water.

[0002]

2. Description of the Related Art Conventionally, golf courses have been provided with water tanks for securing water for watering.

This water storage tank stores rainwater and groundwater and is used for watering grass and the like. Therefore, considering the influence on the turf, the water is not preferable if it contains heavy metals such as iron and manganese, and nitrogen and phosphorus (hereinafter referred to as impurities). In addition, if such impurities are contained, there is also a problem that the impurities adhere to a water pipe or the like that is connected to the water storage tank and deteriorate the water pipe.

Up to now, the water stored in the water storage tank is simply allowed to stand for a predetermined time to precipitate impurities, and then the supernatant is taken out, or the bottom of the water storage tank is laid with sand, gravel, etc. Is formed, impurities are removed by passing through this water-permeable layer, and water is taken out from the lower side of this water-permeable layer,
In addition, a large-scale chemical purification device that uses appropriate filter media and chemicals (eg, NaClO that oxidizes iron and manganese ions to remove ionized iron and manganese) is used to purify water. I am doing it.

[0005]

However, in the above means, there is still a limit in purifying water, and the fact that it is left for a predetermined time is an absolute condition, so that the purifying efficiency is poor. There are drawbacks.

Further, the above-mentioned means has a problem that the continuous layer is clogged with impurities due to repeated use. In particular, depending on the soil quality of the area, iron powder or the like deposits and adheres on the aquifer, often impeding the water-passing function of the aquifer within a few days. Therefore, in this case, a new water-permeable layer must be formed again with new sand and gravel, which is very troublesome.

Further, the above-mentioned means naturally has a drawback of high cost.

The present invention provides a filtration device that solves the above-mentioned drawbacks.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

A water tank 2 for storing water is provided, and this water tank 2
The water-conducting part 1 is provided on the upper part of one side, and the water-permeable layer 4 formed by laying appropriate members such as sand and gravel is provided at the bottom of the water tank 2, and part or all of the water-permeable layer 4 is water-conducted. The water storage tank 2 is provided with a drainage section 5 which is formed in the inclined water passage 4 ′ that is inclined downward from the portion 1 to the other side of the water storage tank 2 and discharges the permeated water that has permeated the water passage 4 to the outside of the water storage tank 2. The present invention relates to a filtration device.

A filtration device according to claim 1, wherein a water-permeable mat 6 is laid on the water-permeable layer 4 and relates to the filtration device.

A filtering device according to any one of claims 1 and 2, wherein a sub-drainage portion 7 is provided on the other side of the water storage tank 2 and can be opened and closed by an appropriate means. The present invention relates to a filtering device.

A filter device according to claim 3, wherein a water collecting portion (12) for collecting drainage water from the drainage portion (5) and a water collecting portion (13) for collecting drainage water from the sub-drainage portion (7). The present invention relates to a filtration device, characterized in that it is provided outside the water tank and both of the water collecting portions 12 and 13 are communicated with each other.

[0014]

The water from the water guiding section 1 flows down on the inclined water-passing layer 4'of the water tank 2, permeates into the water-passing layer 4, is filtered, and is discharged from the drain section 5 to the outside of the water tank 2.

At this time, due to the water flowing down on the inclined water-passing layer 4 ', impurities accumulated in the inclined water-passing layer 4'are washed away downward, and the inclined water-passing layer 4'is clogged. Absent.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings illustrate one embodiment of the present invention and will be described below.

The water storage tank 2 is formed of concrete or the like. A perforated pipe 8 (underdrain pipe) is laid at the bottom of the water storage tank, and water is discharged to the outside of the water storage tank 2 through the perforated pipe 8.

A water conduit 1 is formed on one side of the water storage tank 2. Water containing impurities is introduced into the water guiding section 1, and when the water level rises, the water overflowing from the water guiding section 1 flows into the water storage tank 2 (the inclined water passage layer 4 ').

Reference numeral 9 is a water supply pipe, which is provided at the center of the water guiding portion 1 so as to uniformly overflow from the water guiding portion 1.

On the perforated pipe 8, crushed stone, gravel, and sand are laid in order from the lower side to form the water passage layer 4. The water-passing layer 4 has a horizontal flat water-passing layer 4 ″ having a predetermined area on the left side in FIGS. 1 and 2, and an inclined water-passing layer 4 ′ that is inclined upward to the right side in FIGS. 1 and 2 is formed. Structure.

A water-permeable mat 6 is laid on the water-permeable layer 4 to contain the crushed stone, gravel, and sand and to capture impurities, and the water-permeable mat 6 is further supplemented with impurities. Rice straw 18 is laid on the rice straw, and an appropriate pressing member (wood board, iron plate, etc.) is laid to hold the rice straw 18.

Two cylinders 10 and 10 'communicating with the outside of the water storage tank 2 are erected at the position of the flat water passage 4 ".
A valve hole 11 is formed in the upper part of 0, 10 'for collecting the supernatant in the water tank 2.

The valve hole 11 is constituted by a solenoid valve, a motor-operated valve or the like so that it can be opened and closed arbitrarily. Specifically, it is configured to open the valve 30 minutes after the water is introduced from the water guiding section 1 to the inclined water-passing layer 4 ′ and close the valve 30 minutes later. This is because a considerable amount of impurities will precipitate 30 minutes after the introduction of water.

On the ground outside the water tank 2, a cylindrical water collecting portion 12 for collecting the drainage from the drainage portion 5 and a cylindrical water collecting portion 13 for collecting the drainage from the sub drainage portion 7. The water collecting part 12 and the water collecting part 13 are communicated with each other by the communication pipe 3, and the bottom positions of the water collecting part 12 and the water collecting part 13 are set to the same horizontal position. The water from the perforated pipe 8 is introduced into the water collecting portion 12, and the water from the valve hole 11 of the cylindrical bodies 10 and 10 'is introduced into the water collecting portion 13. Then, the water collected in the water collecting section 13 is introduced into an appropriate storage section, for example, a pond or the like via the main drain pipe 17.

Reference numeral 14 is a drain pipe for draining the water in the water conduit 1, and 15 is an overflow pipe for emergencies such as when the water tank 2 becomes full and overflows. And is in communication with the catchment section 13.

In order to oxidize and precipitate the ionized impurities, it is advisable to add an appropriate chemical such as NaClO to the water storage tank 2.

Since this embodiment has the above-mentioned structure, for example, the water in the pond in the premises of the golf course, which stores rainwater, is introduced into the water guiding section 1.
It is introduced into the water tank 2 in several times via the. That is, the water is introduced into the water guiding section 1, and the water introduced into the water guiding section 1 fills the water guiding section 1, overflows the water guiding section 1 and is water-conducted to the inclined water passage layer 4'on average, This water flows down through the inclined aquifer 4 '.

Since water permeates the rice straw 18, the water passage mat 6, and the water passage layer 4, impurities such as iron and manganese contained in the water enter the rice straw 18, water passage mat 6, and water passage layer 4. The impurities are supplemented and deposited on the rice straw 18, the water passage mat 6, and the water passage layer 4. Rice straw 1
8, water mat 6, water that passed through the water layer 4 is purified,
The water is discharged to the outside of the reservoir 2 through the perforated pipe 8.

Water flows through the rice straw 18 when it flows down the inclined aquifer 4 '.
And straw mats 6, slanted water passages 6 and slanted water passages 6 have a function of washing away impurities accumulated in the water passage mat 6 and the inclined water passage layer 4'and convey the impurities to the flat water passage layer 4 ". The situation in which the layer 4 ′ is clogged due to the accumulation of impurities to impede the water-passing function is suppressed as much as possible, and this wash-out action is particularly remarkable in the rice straw 18 which is the outermost layer.

When a predetermined amount of water is introduced into the water storage tank 2 several times a day, for example, and repeatedly used, the flat water layer 4 "(including the rice straw 18 and the water mat 6) is washed by the washing action. Impurities may accumulate, and the water-passing function on the flat water-passing layer 4 "may deteriorate.

In such a case, the valve hole 1 of the cylindrical body 10 or 10 '
If 1 is set so that the valve is opened a predetermined time after the introduction of water from the introduction part 1, impurities are accumulated in the water storage tank 2 after the elapse of this predetermined time, and the supernatant thereof is stored through the valve hole 11. Since the water is discharged to the outside of the tank 2, the water is drained through the perforated pipe 8 and the water is drained through the valve hole 11 at the same time, which is efficient.

Further, when impurities are deposited on the flat water-permeable layer 4 "in this way, for example, the means for replacing the sand, gravel, etc., the rice straw 18, and the water-permeable mat 6 of the flat water-permeable layer 4" are also available. It is possible. In this case, unlike the conventional method, replacement is performed in a small area portion, and not replacement in a wide area of the entire bottom of the water storage tank 2, so that workability is very good in that respect.

In addition, if rice straw 18 is accumulated with impurities,
When it can be incinerated as it is and impurities include heavy metals, pollution problems do not occur (generally, water containing heavy metals must be removed after discarding the heavy metals, and the treatment thereof is very troublesome). .

The present embodiment also has the following features.
This point will be described with reference to FIG.

A predetermined amount of water (specifically, about 17 tons of water each time) introduced from the water conduit 1 into the water tank 2 passes through the rice straw 18, the water mat 6, and the water layer 4, and Water collection part through hole pipe 8
Introduced to 12. The amount of water introduced into the water collecting portion 12 through the perforated pipe 8 is small compared with the amount of water introduced from the water conveying portion 1 into the water storage tank 2.

The small amount of water introduced into the water collecting section 12 through the perforated pipe 8 means that the water in the water storage tank 2 does not readily decrease, and this means that the filtration efficiency is poor. Will be directly connected to.

However, in the case of this embodiment, the amount of water introduced into the water collecting section 12 through the perforated pipe 8 is small only at the initial stage (specifically, 30 minutes until the valve hole 11 is opened). Is.

Explaining this point in detail, in the initial stage, the water collecting section
There is no introduction of water into the inside 13, and only a small amount of water is introduced into the water collecting portion 12 through the perforated pipe 8.

However, after a lapse of 30 minutes, the valve holes 11 of the cylinders 10 and 10 'are opened, and a large amount of water is introduced into the water collecting section 13,
Water flows back through the communication pipe 3, the water level in the water collecting section 12 rises, and naturally flows back into the perforated pipe 8.

After that, when the valve hole 11 is closed and the introduction of water into the water collecting section 13 is stopped (the water in the water collecting section 13 is naturally drained from the main drain pipe 17), this time. The water in the water collecting section 12 flows into the water collecting section 13 having a low water level through the communication pipe 3. At this time, a negative pressure pump action (suction action) is exhibited due to the sudden drop of the water level in the water collecting section 12, and the water in the water storage tank 2 is perforated by the perforated pipe 8
It is strongly sucked in.

Therefore, the water in the water storage tank 2 is filtered very quickly, and the efficiency of filtering the water in the water storage tank 2 is greatly improved. Specifically, the water in the water storage tank 2 is filtered and discharged in about half the time as compared with the case where the water collecting portions 12 and 13 as in the present embodiment are not provided.

The purified water taken out of the water storage tank 2 as described above is stored, for example, in the water reservoir for sprinkling water through the main drain pipe 17 and used for sprinkling the grass or the like.

In addition to the use method described above, the present apparatus can be used, for example, as follows.

(1) A plurality of water storage tanks 2 according to this embodiment are provided side by side, and filtration is performed a plurality of times.

(2) In the case of the above-mentioned conventional method, the filter medium becomes dirty with impurities due to repeated continuous use, so that it becomes necessary to wash the filter medium. When the filter medium is washed, the filter medium wash water contains impurities such as heavy metals, and the treatment of this filter medium wash water is very troublesome. (As mentioned above, it is an environmental issue to discharge such water as it is. Is not preferable.) In such a case, the filter medium cleaning water can be purified by introducing the filter medium cleaning water (water after cleaning the filter medium) into the water guiding section 1 of the present apparatus.

In this embodiment, the method of using (1) and (2) can be used.

[0047]

As described above, the present invention provides a filtration device that can purify water very easily.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of the present embodiment.

FIG. 2 is a sectional view of the present embodiment.

FIG. 3 is an explanatory sectional view of the present embodiment.

[Explanation of symbols]

 1 Water transfer part 2 Water tank 4 Water transfer layer 4'Slope water transfer layer 5 Drainage part 6 Water transmission mat 7 Secondary drainage part 12,13 Water collection part

Claims (4)

[Claims] 1. A water tank for storing water is provided, a water guiding section is provided at an upper part of one side of the water tank, and a water passage layer is provided at the bottom of the water tank by laying appropriate members such as sand and gravel. A part or all of this water-permeable layer is formed into a sloped water-permeable layer that slopes downward from the water-conducting part to the other side of the water storage tank, and the drainage part that discharges the permeated water that has permeated the water-permeable layer outside the water storage tank A filtration device characterized by being provided in a water tank. 2. The filtering device according to claim 1, wherein a water-permeable mat is laid on the water-permeable layer. 3. The filtration device according to claim 1, further comprising a sub-drainage portion which is located on the other side of the water tank and which can be opened and closed by an appropriate means on the upper portion. And a filtration device. 4. The filtering device according to claim 3, wherein a water collecting portion that collects the drainage from the drainage portion and a water collecting portion that collects the drainage from the secondary drainage portion are provided outside the water tank. A filtering device, which is provided and allows both water collecting parts to communicate with each other.