JPH07213591A - Sand pit sterilization - Google Patents

Abstract

PURPOSE:To provide a method for an on-site sand pit sterilization and deodorizing with no necessity of sand replacement. CONSTITUTION:A pipe body 6 with a number of small holes to sprinkle aqueous ozone solution is set and buried in the sand layer of a sand pit 1, the surface of the sand pit 1 is covered with a sheet body 13, an aqueous ozone solution is stored in a storing tank 12 and concentrated, and then the concentrated aqueous ozone solution is supplied to a pipe body 6 to infiltrate into the sand in the sand pit. Transportation of the aqueous ozone solution is repeatedly performed in an almost fixed interval for a designated time. When a time from ten minutes to an hour has passed, ozone left in the sand pit is exhausted through an activated carbon filter 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandbox sterilization method,
The present invention relates to a sandbox sterilization method capable of exhibiting an excellent sterilization effect without accompanying secondary adverse effects.

[0002]

2. Description of the Related Art Sandboxes are installed in parks, schools, kindergartens, etc., and schoolchildren and kindergartens are used to dig small tunnels and make small tunnels at the time of fine weather, or as a buffer landing site for jumping movements. However, sandboxes are the preferred place for dogs, cats, and birds to drop their wastes, and they easily become a nest of bacteria and odors. Bacteria include Escherichia coli, Salmonella, Vibrio parahaemolyticus, tetanus, and fungi, and the number of cases in which infants and people with weak resistance are infected by the pathogenic bacteria is increasing.

[0003]

In order to maintain the cleanliness of the sandbox, the conventional method has been to replace the contaminated sand in the sandbox with another clean sand, or to spray chemicals on the sandbox. It was However, the former method is costly and difficult to implement frequently, and the latter method has the disadvantage that chemicals remain in the sand, which has a secondary adverse effect or increases a bad odor. there were.

In view of the above problems, it is an object of the present invention to provide a sandbox sterilization method which can completely sterilize and deodorize a sandbox installation site without requiring sand replacement.

[0005]

The sandbox sterilization method according to the present invention is executed by the procedure described below. A pipe body with a large number of small holes for spraying ozone-dissolved water is buried in the sand layer of the sandbox.

[0006] Next, the surface of the sandbox is covered with a sheet, ozone-dissolved water is stored in a storage tank, and the ozone concentration of the ozone-dissolved water in this storage tank is concentrated. After that, the concentrated ozone-dissolved water is fed to the pipe body, and the ozone-dissolved water is infiltrated into the sand inside the sandbox.

The ozone-dissolved water is fed to the pipe body repeatedly at almost constant intervals within a predetermined time, and thereafter,
After about 10 minutes to 1 hour, ozone remaining in the sandbox is exhausted through the activated carbon filter.

[0008]

The ozone-dissolved water reaches every corner of the sand in the sandbox, and the surface of the sandbox is covered with the sheet, so that the ozone is filled in the sandbox below the sheet. Therefore, due to the strong sterilizing power and deodorizing power of ozone, various bacteria in the sandbox are instantly killed, and the foul odor is also dissipated. And since the toxicity of ozone does not last for a long time, it will be restored to a clean and safe sandbox soon after the sterilization work is completed.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a schematic cross section of an apparatus and a sandbox for carrying out the sandbox sterilization method of the present invention. In the figure, a sandbox 1 is a concrete container 2
A drainage groove 3 is formed in the center of the container 2. A gravel layer (green) 4 is disposed below the drainage groove 3, and the lower portion of the gravel layer 4 leads to the ground. The container 2 is filled with river sand 5 or sea sand.

In carrying out the sandbox sterilization method of the present invention, in the sand of the sandbox 1, for example, 5 cm to 10 cm from the surface of the sand layer.
The pipe body 6 as shown in FIG. The pipe body 6 is made of stainless steel, titanium or other metal material, or vinyl chloride, Teflon, nylon, fluorine rubber, propylene rubber, silicon rubber, urethane rubber or other synthetic resin material and is distributed as uniformly as possible in the sandbox 1. It is formed into a shape that In consideration of ease of transportation, the pipe body 6 is constructed so that it can be divided into several parts, each of which is connected by a connecting means (joint), or a pipe made of a flexible member. It is good to construct it as a body. A small hole 7 is formed on the surface of the pipe body 6.
Are drilled almost uniformly or in rows vertically and horizontally,
In addition, a projection cylinder 8 for connecting a water supply hose is formed at at least one location or a plurality of locations of the pipe body 6,
A water supply hose is connected to the protruding cylindrical body 8. In the embodiment, the protruding cylindrical body 8 is provided at two places. In addition,
The pipe body 6 may be placed on the surface of the sand layer without being buried in the sand.

The water supply hose 9 connected to the protruding cylindrical body 8 is made of fluorine rubber, propylene rubber, silicon rubber, urethane rubber or other synthetic resin material and has flexibility, and the control valve 10 and the pump 11 are provided. It is connected to the storage tank 12 via.

After the installation of the pipe body 6 in the sandbox 1, the surface of the sandbox 1 is covered with vinyl chloride, nylon,
Cover with urethane rubber or other sheet body 13. The peripheral edge of the sheet body 13 may be filled with sand in the sandbox 1 or may be suppressed by boulders.

The storage tank 12 has an ozone dissolving device 1
Ozone-dissolved water from the discharge port 4 is controllably supplied by the control valve 15. Water from a water supply source such as a water supply or a water tank is controllably supplied by a control valve 16, and a pressure gauge 17 is provided in a water supply passage of the control valve 16 on the ozone dissolving device 14 side. On the other hand, the oxygen generated by the oxygen generator 18 is supplied to the ozone generator 19, and the ozone obtained by the ozone generator 19 is supplied to the ozone dissolving device 14. The concentration of ozone obtained by the ozone generator 19 can be measured by a densitometer 20. The ozone-dissolved water stored in the storage tank 12 is circulated by the circulation pump 2.
1 by the control of the control valve 1 and the control valve 22.
It is configured so that it can be returned to the water supply channel of No. 4.

An end of an exhaust hose 23 is inserted between the sheet body 13 and the surface of the sand layer. The exhaust from the exhaust hose 23 is controlled by a damper 24 and passes through an activated carbon filter 25 by an exhaust blower 26. It is designed to be released into the atmosphere. However, the structure for this exhaust is not necessarily required, and the exhaust hose 23, the damper 24, the activated carbon filter 25, and the exhaust blower 26 may be omitted and not provided. A sensor (including a limit switch) 27 for detecting the water level of ozone-dissolved water is provided at the end of the storage tank 12, and is connected to an electronic circuit for controlling the control valve, pump, and the like. .

Then, first, the control valve 10 is closed, the control valve 16 is opened, and a predetermined amount of ozone-dissolved water is produced by the ozone-dissolving device and stored in the storage tank 12. Next, in order to appropriately concentrate the ozone concentration of the ozone-dissolved water in the storage tank 12, the control valve 16 is closed and the control valve 22 is closed.
And open the circulation pump 21 to operate the storage tank 1
The ozone-dissolved water in 2 is circulated through the ozone-dissolving device 14. After concentrating ozone-dissolved water to an appropriate concentration,
The circulation valve 21 is stopped without inserting hair and the control valve 1
0 is opened and the pump 11 is operated to feed the ozone-dissolved water to the pipe body 6. The reason why it is necessary to perform the work quickly after concentrating the ozone-dissolved water is that ozone in water self-decomposes in a short time and is halved after tens of minutes. As described above, ozone-dissolved water does not continue to be toxic, which is an advantage for sterilization.

The above-mentioned work is carried out every 5 to 10 minutes.
Repeatedly for 0 minutes to one and a half hours, bacteria such as Escherichia coli, Salmonella, Vibrio parahaemolyticus, tetanus, and fungi are completely killed, and a foul odor is also removed.

When the above-mentioned work is completed and residual ozone in the sandbox is exhausted through the activated carbon filter 25, until the sterilization is completed and the ozone concentration is lowered, that is, 10 after the sterilization work is completed. It is advisable to start the exhausting work after a lapse of about 1 minute to 1 hour. In the embodiment, the pipe body 6 is used to spray ozone-dissolved water on the sand in the sandbox 1.
It is also possible to sterilize by supplying ozone-dissolved water from the water supply hose 9 into the sandbox and immersing the sand inside the sandbox with the ozone-dissolved water without using the. Further, in the above-mentioned embodiment, the ozone-dissolved water is stored in the storage tank 12 and concentrated, but if the oxygen generator 18 and the ozone generator 19 have strong functions, The control valve 15
Ozone-dissolved water directly from the outlet of the water supply hose 9
It is also possible to guide the water to the sand in the sandbox 1 or to immerse the sand in the sandbox 1 with ozone-dissolved water.

[0018]

As described in detail above, according to the present invention, it is possible to perform complete sterilization at a sandbox installation site without the need to replace the sand, and the poisonous substances remain in the sandbox for a long time. In addition, the treatment agent used for sterilization does not cause environmental pollution, and deodorization can also be performed, which is very useful.

[Brief description of drawings]

FIG. 1 is a schematic view showing a schematic cross section of an apparatus and a sandbox for carrying out the sandbox sterilization method of the present invention.

FIG. 2 is a plan view showing a pipe body which is embedded in the sand of the sandbox or placed on the surface of the sand layer of the sandbox.

[Explanation of symbols]

 1 sandbox 2 container 3 drainage groove 4 gravel layer 5 river sand 6 pipe body 7 small hole 8 protruding cylinder body 9 water supply hose 10 control valve 11 pump 12 storage tank 13 sheet body 14 ozone dissolving device 15 control valve 16 control valve 17 pressure gauge 18 Oxygen generator 19 Ozone generator 20 Concentration meter 21 Circulation pump 22 Control valve 23 Exhaust hose 24 Damper 25 Activated carbon filter 26 Exhaust blower 27 Sensor

Claims (10)

[Claims] 1. A method for sterilizing a sandbox, which comprises covering the surface of the sandbox with a sheet, and then infiltrating ozone-dissolved water into the sand inside the sandbox. 2. A sandbox sterilization method, which comprises covering the surface of the sandbox with a sheet and then spraying ozone-dissolved water on the sand inside the sandbox. 3. A sandbox sterilizing method, which comprises covering the surface of the sandbox with a sheet and then immersing the sand inside the sandbox with ozone-dissolved water. 4. The surface of the sandbox is covered with a sheet, the ozone-dissolved water is stored in a storage tank, the ozone concentration of the ozone-dissolved water in the storage tank is concentrated, and the concentrated ozone-dissolved water is then stored in the sandbox. A sandbox sterilization method, which is performed by sprinkling water on the sand inside. 5. The surface of the sandbox is covered with a sheet, the ozone-dissolved water is stored in a storage tank, the ozone concentration of the ozone-dissolved water in the storage tank is concentrated, and then the sand-dissolved water is concentrated. The sandbox sterilization method, which is performed by immersing the sand inside the sand. 6. A pipe body, in which a large number of small holes for spraying ozone-dissolved water are formed, is embedded in a sand layer of a sandbox, and then the surface of the sandbox is covered with a sheet body to allow the ozone-dissolved water to flow through the pipe. A sandbox sterilization method, which comprises feeding water to the body and spraying ozone-dissolved water on the sand inside the sandbox. 7. A pipe body having a large number of small holes for sprinkling ozone-dissolved water in a sand layer of a sandbox is buried, and then the surface of the sandbox is covered with a sheet to store the ozone-dissolved water in a storage tank. The concentration of ozone-dissolved water in the storage tank is concentrated, the concentrated ozone-dissolved water is then fed to the pipe body, and the ozone-dissolved water is sprayed on the sand inside the sandbox. A sandbox sterilization method characterized in that 8. A pipe body, in which a large number of small holes for spraying ozone-dissolved water are formed, is buried in a sand layer of the sandbox, and then the surface of the sandbox is covered with a sheet body to spray the ozone-dissolved water of the sandbox. A sandbox sterilization method characterized in that water is sprayed on the sand inside and the ozone-dissolved water is fed to the pipe body repeatedly within a predetermined time period at substantially constant intervals. 9. A pipe body having a large number of small holes for sprinkling ozone-dissolved water in a sand layer of a sandbox is buried, and then the surface of the sandbox is covered with a sheet to store the ozone-dissolved water in a storage tank. Stored in the storage tank, the ozone concentration of the ozone-dissolved water in the storage tank is concentrated, and then the concentrated ozone-dissolved water is fed to the pipe body, and the ozone-dissolved water is sprinkled on the sand inside the sandbox. A sandbox sterilization method characterized in that the ozone-dissolved water is repeatedly fed to the pipe body within a predetermined time period at almost constant intervals. 10. A pipe body having a large number of small holes for sprinkling ozone-dissolved water in a sand layer of a sandbox is buried, and then the surface of the sandbox is covered with a sheet to store the ozone-dissolved water in a storage tank. Stored in the storage tank, the ozone concentration of the ozone-dissolved water in the storage tank is concentrated, and then the concentrated ozone-dissolved water is fed to the pipe body, and the ozone-dissolved water is sprayed on the sand inside the sandbox. The ozone-dissolved water is repeatedly supplied to the pipe body within a predetermined time period at almost constant intervals, and then 1
A method for sterilizing a sandbox, which comprises performing exhaustion of ozone remaining in the sandbox through an activated carbon filter after about 0 minute to 1 hour.