Water circulation system

Abstract

To provide a water circulation system that reduces the burden on the environment.SOLUTION: A water circulation system 10 includes a rainwater storage tank 16 for storing rainwater, an artificial pond 18, an artificial pond tank 20 for storing water including rainwater supplied from the rainwater storage tank 16 as water for the artificial pond, and a fire extinguishing water tank 22 for storing water for fire extinguishing, and is capable of circulating water between the artificial pond 18, the artificial pond tank 20, and the fire extinguishing water tank 22. The water circulation system further includes purification means 24 for filtering and sterilizing the water in the artificial pond tank 20 to purify it, first water supply means 26 for supplying the water purified by the purification means 24 to at least one of the artificial pond 18 or the fire extinguishing water tank 22, second water supply means 28 for supplying the water in the artificial pond 18 to at least one of the artificial pond tank 20 or the fire extinguishing water tank 22, and third water supply means 30 for supplying the water in the fire extinguishing water tank 22 to at least one of the artificial pond 18 or the artificial pond tank 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a water circulation system suitable for protecting the ecosystem and securing water for firefighting. [Background technology]

[0002] Traditionally, water basins and ponds have been placed around cultural properties and large-scale buildings, and the waterscape has been maintained by supplying water from natural water sources such as wells and river water, or from city water (see, for example, Patent Document 1). In many cases, when evaporation is high, such as during the dry winter or summer, water quality is maintained by replenishing several tons of water every day. In the case of water basins, there are restrictions on the amount of water that can be replenished, and higher water quality is required, so water quality is often maintained by circulating stagnant water through a filter equipped with chlorine disinfection equipment.

[0003] In addition, cultural properties and large buildings require fire water (fire fighting water) for the purpose of extinguishing fires and other fires, and in many cases water is used from independently installed fire water tanks (fire prevention water tanks) with a capacity of several tons to several tens of tons. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-124541 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, maintaining the waterscape of the basin requires water supply from city water, rivers, wells, etc., which places a burden on the environment. In addition, residual chlorine from the city water and disinfection equipment used to maintain the water quality of the basin could have an unintended impact or burden on the ecosystem. Water containing chlorine can cause efflorescence and stains due to chlorine in the surrounding area, making cleaning a burden.

[0006] In addition, firefighting water tanks entail initial costs such as the installation location, installation space, and initial costs, and in terms of maintenance, a large amount of water must be consumed and replaced in order to maintain the water quality according to the tank's capacity. Also, reducing the frequency of water replacement can cause problems such as the water inside and the tank becoming dirty and rotting, as well as problems such as mud accumulation and algae growth, which can lead to dirt and odors when used in firefighting activities or training.

[0007] The present invention has been made in view of the above, and has an object to provide a water circulation system that can reduce the burden on the environment. [Means for solving the problem]

[0008] In order to solve the above problems and achieve the object, the water circulation system of the present invention comprises a rainwater storage tank for storing rainwater, an artificial pond, an artificial pond tank for storing water including rainwater supplied from the rainwater storage tank as water for the artificial pond, and a fire extinguishing water tank for storing water for fire extinguishing, and is capable of circulating water between the artificial pond, the artificial pond tank, and the fire extinguishing water tank, and is characterized in having a purification means for filtering and sterilizing the water in the artificial pond tank to purify it, a first water supply means for supplying the water purified by the purification means to at least one of the artificial pond or the fire extinguishing water tank, a second water supply means for supplying the water from the artificial pond to at least one of the artificial pond tank or the fire extinguishing water tank, and a third water supply means for supplying the water from the fire extinguishing water tank to at least one of the artificial pond or the artificial pond tank.

[0009] In addition, another water circulation system according to the present invention, in the above-mentioned invention, is characterized in that the purification means has a sterilization device that irradiates the water with deep ultraviolet rays to sterilize bacteria in the water. Effect of the Invention

[0010] According to the water circulation system of the present invention, the water circulation system includes a rainwater storage tank for storing rainwater, an artificial pond, an artificial pond tank for storing water including rainwater supplied from the rainwater storage tank as water for the artificial pond, and a fire extinguishing water tank for storing water for fire extinguishing, and can circulate water between the artificial pond, the artificial pond tank, and the fire extinguishing water tank, and includes a purification means for filtering and sterilizing the water in the artificial pond tank to purify it, a first water supply means for supplying the water purified by the purification means to at least one of the artificial pond or the fire extinguishing water tank, a second water supply means for supplying the water in the artificial pond to at least one of the artificial pond tank or the fire extinguishing water tank, and a third water supply means for supplying the water in the fire extinguishing water tank to at least one of the artificial pond or the artificial pond tank, so that the burden on the water supply, rivers, wells, etc. can be reduced by using rainwater as the water source for the artificial pond and the fire extinguishing water tank. Therefore, the effect of reducing the burden on the environment is achieved.

[0011] In addition, according to another water circulation system of the present invention, the purification means has a sterilization device that irradiates the water with deep ultraviolet rays to sterilize bacteria in the water, thereby achieving the effect of reducing the impact on the ecosystem and chlorine-derived dirt by using a sterilization method that does not use chlorine. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a plan view showing an embodiment of a water circulation system according to the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing an embodiment of a water circulation system according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A water circulation system according to an embodiment of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to the embodiment.

[0014] As shown in Figures 1 and 2, a water circulation system 10 according to an embodiment of the present invention includes a rainwater storage tank 16, an artificial pond 18, a water tank for an artificial pond 20, and a water tank for firefighting 22 provided on the site 14 of a large-scale building 12 such as a cultural property, and enables water to circulate between the artificial pond 18, the water tank for an artificial pond 20, and the water tank for firefighting 22. This water circulation system 10 includes a purification means 24, a first water supply means 26, a second water supply means 28, and a third water supply means 30. A lotus pond 32 and a reed pond 34 are provided within the site 14.

[0015] The rainwater storage tank 16 stores rainwater from the site 14 and its surrounding areas. The rainwater storage tank 16 and the artificial pond tank 20 are connected by a water supply channel 36, and water from the rainwater storage tank 16 can be supplied to the artificial pond tank 20 via the water supply channel 36.

[0016] The artificial pond 18 is a water basin provided on the site 14 for landscaping. Water from the artificial pond water tank 20 can be supplied to the artificial pond 18 via the purification means 24 and the first water supply means 26. Four water supply pipes 28A-28D are connected to the artificial pond 18. A flow rate control valve is provided to each of the water supply pipes 28A-28D, and a pump is connected to each of the water supply pipes 28A-28D. The water supply pipes 28A-28D are connected to the artificial pond water tank 20, the fire water tank 22, the lotus pond 32, and the reed pond 34, respectively, and by operating the pump, water that has overflowed from the water basin can be supplied at a predetermined flow rate through each water supply pipe. The water supply pipes 28A and 28B are second water supply means. Note that if a height difference can be secured between the water supply destination and the water supply destination, water may be supplied by free fall due to the action of gravity without using a pump.

[0017] The artificial pond tank 20 stores water, including rainwater, supplied from the rainwater storage tank 16 as water for the artificial pond, and has a basin tank 20A and a return water tank 20B. The basin tank 20A and the return water tank 20B are connected via a valve (not shown), and communicate with each other when the valve is opened. A pump (not shown) is provided inside one of the tanks, and water can be conveyed by operating the pump. The basin tank 20A and the return water tank 20B are connected to the purification means 24 via water supply pipes 38A and 38B, respectively. A flow rate adjustment valve is provided on each of the water supply pipes 38A and 38B, and a pump is connected to each of the water supply pipes 38A and 38B. By operating the pump, the water in the basin tank 20A and the return water tank 20B is sent to the purification means 24 via the water supply pipes 38A and 38B. After being purified there, it can be supplied to the artificial pond 18 via the water supply pipe 26A (first water supply means 26). In addition, if a height difference can be secured between the water supply destination and the water supplying destination, the water may be supplied by free fall due to the action of gravity without using a pump.

[0018] The basin tank 20A is connected to a water supply pipe 28A (second water supply means 28) from the artificial pond 18 and a water supply pipe 30A (third water supply means 30) from the fire extinguishing water tank 22. Therefore, the basin tank 20A can receive the water from the artificial pond 18 and the water from the fire extinguishing water tank 22. The return water tank 20B is connected to a water supply channel 36 from the rainwater storage tank 16, drainage channels 32A and 34A from the lotus pond 32 and the Japanese pond 34, and a return water pipe 40 from the purification means 24. Therefore, the return water tank 20B can receive the water from the rainwater storage tank 16, the water from the lotus pond 32 and the Japanese pond 34, and the water from the purification means 24. The water from the return water tank 20B is sent to the basin tank 20A as necessary.

[0019] The fire extinguishing water tank 22 stores water for fire extinguishing used on the site 14. The fire extinguishing water tank 22 is connected to a fire sprinkler and a water curtain fire extinguishing system used in the event of a fire. Water from the artificial pond 18 can be supplied to the fire extinguishing water tank 22 through a water supply pipe 28B (second water supply means 28). The fire extinguishing water tank 22 is also connected to the basin water tank 20A through a water supply pipe 30A (third water supply means 30). A flow rate control valve is provided to the water supply pipe 30A, and a pump is connected to the water supply pipe 30A. By operating the pump, water from the fire extinguishing water tank 22 can be supplied to the basin water tank 20A through the water supply pipe 30A. Note that if a height difference can be secured between the water supply destination and the water supply destination, water may be supplied by free fall due to the action of gravity without using a pump.

[0020] The purification means 24 purifies the water sent from the artificial pond water tank 20 by filtering and sterilizing it, and includes a filtering device 24A and a sterilizing device 24B provided in the first water supplying means 26. The filtering device 24A filters the water sent from the artificial pond water tank 20. The sterilizing device 24B sterilizes the water filtered by the filtering device 24A. The sterilized water is supplied to the artificial pond 18 through the water supply pipe 26A. The sterilizing device 24B is connected to a return pipe 40. The sterilizing device 24B is a device that irradiates the water with deep ultraviolet rays from a light source such as an LED to sterilize bacteria in the water. This device does not use chlorine, so it is possible to reduce the impact on the ecosystem and efflorescence stains caused by chlorine. In addition, compared to sterilization methods using chlorine, the frequency of maintenance is reduced, so maintenance costs can be reduced.

[0021] According to this embodiment, water can be circulated between the artificial pond 18, the artificial pond water tank 20, and the firefighting water tank 22. Rainwater is used as the water source for the artificial pond 18 and the firefighting water tank 22, and is used as circulating water. By replenishing the artificial pond water tank 20 from the rainwater storage tank 16 during transpiration, the burden on water sources such as rivers and wells, and on water supply can be reduced. Even during droughts, the burden on water sources and water supply is small, and replenishment from water supply can be done additionally during long droughts, so the burden on water sources and water supply can be reduced. Therefore, the burden on the environment can be reduced. Furthermore, the waterscape can be used to maintain the scenery and secure water for firefighting at the same time.

[0022] In addition, the water in the artificial pond 18 etc. is sterilized with deep ultraviolet light, and by not using chlorine or tap water, it is possible to put no strain on the ecosystem, including plants, and the environment, and to suppress the growth of algae and bacteria that are harmful to the aquatic ecosystem, while reducing the impact of residual chlorine on the ecosystem and pollution caused by chlorine.

[0023] By incorporating the fire water tank 22 as part of the water circulation system 10 and making it possible to replace the fire water, the quality of the fire water can be preserved. Therefore, no dirt or odor is generated even during firefighting activities or training. In particular, in cultural properties or large buildings, if tap water containing chlorine is used as fire water, dirt will be induced, and wood parts are prone to dirt and discoloration due to chlorine. On the other hand, in this embodiment, the surfaces of cultural properties or large buildings are not soiled even during firefighting activities or training.

[0024] In addition, because the water in the artificial pond 18 can be used as fire extinguishing water, the size and volume of the fire extinguishing water tank 22 itself can be reduced. This allows for a layout plan that takes into consideration the scenery as a water feature such as the artificial pond 18. Also, by combining it with a fire extinguishing system that extinguishes the fire only in the fire outbreak zone (for example, a water curtain fire extinguishing system), it is possible to reduce the required volume of fire extinguishing water itself.

[0025] In the above embodiment, the water supply pipe 26A of the first water supply means 26 is described as supplying water from the artificial pond tank 20 to the artificial pond 18, but the first water supply means of the present invention is not limited to this, and may be configured to supply water from the artificial pond tank 20 to the fire extinguishing water tank 22. Also, the water from the artificial pond tank 20 may be configured to supply water to the artificial pond 18 and the fire extinguishing water tank 22.

[0026] In addition, in the above embodiment, an example has been described in which the water supply pipes 28A, 28B of the second water supply means 28 supply water from the artificial pond 18 to the artificial pond tank 20 and the fire extinguishing water tank 22. However, the second water supply means of the present invention is not limited to this, and may be configured to be capable of supplying water from the artificial pond 18 to either the artificial pond tank 20 or the fire extinguishing water tank 22.

[0027] In the above embodiment, the water supply pipe 30A of the third water supply means 30 is described as supplying water from the fire extinguishing water tank 22 to the artificial pond water tank 20, but the third water supply means of the present invention is not limited to this, and may be configured to supply water from the fire extinguishing water tank 22 to the artificial pond 18. Also, the third water supply means may be configured to supply water from the fire extinguishing water tank 22 to both the artificial pond 18 and the artificial pond water tank 20.

[0028] As described above, the water circulation system according to the present invention includes a rainwater storage tank for storing rainwater, an artificial pond, an artificial pond tank for storing water including rainwater supplied from the rainwater storage tank as water for the artificial pond, and a fire extinguishing tank for storing water for fire extinguishing, and is capable of circulating water between the artificial pond, the artificial pond tank, and the fire extinguishing tank, and includes a purification means for filtering and sterilizing the water in the artificial pond tank to purify it, a first water supply means for supplying the water purified by the purification means to at least one of the artificial pond or the fire extinguishing tank, a second water supply means for supplying the water in the artificial pond to at least one of the artificial pond tank or the fire extinguishing tank, and a third water supply means for supplying the water in the fire extinguishing tank to at least one of the artificial pond or the artificial pond tank. Therefore, by using rainwater as the water source for the artificial pond and the fire extinguishing tank, the burden on the water supply, rivers, wells, etc. can be reduced. Therefore, the burden on the environment can be reduced.

[0029] In addition, according to another water circulation system of the present invention, the purification means has a sterilization device that irradiates the water with deep ultraviolet rays to sterilize bacteria in the water, so that the sterilization method does not use chlorine, thereby reducing the impact on the ecosystem and chlorine-derived dirt. [Industrial Applicability]

[0030] INDUSTRIAL APPLICABILITY As described above, the water circulation system according to the present invention is useful for preserving the ecosystem of water basins and ponds and for securing water for firefighting, and is particularly suitable for reducing the burden on the environment. [Explanation of symbols]

[0031] 10. Water Circulation System 12 Large-scale buildings 14 Site 16 Rainwater storage tank 18 Artificial pond 20 Artificial pond tank 22 Fire-fighting water tank 24 Purification methods 26 Primary water supply means 28 Second water supply means 30 Third water supply means 32 Lotus Pond 34 Yoshiike Pond

Claims

1. A water circulation system comprising a rainwater storage tank for storing rainwater, an artificial pond, an artificial pond tank for storing water including rainwater supplied from the rainwater storage tank as water for the artificial pond, and a fire extinguishing tank for storing water for fire extinguishing, and capable of circulating water between the artificial pond, the artificial pond tank, and the fire extinguishing tank, A purification means for filtering and sterilizing the water in the artificial pond tank; a first water supply means for supplying the water purified by the purification means to at least one of the artificial pond and the fire extinguishing water tank; A second water supply means for supplying water from the artificial pond to at least one of the artificial pond water tank and the fire extinguishing water tank; and a third water supply means for supplying water from the fire extinguishing water tank to at least one of the artificial pond or the artificial pond water tank.

2. 2. The water circulation system according to claim 1, wherein the purification means includes a sterilization device that irradiates the water with deep ultraviolet light to sterilize bacteria in the water.

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