JP2016166454A - Rainwater facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly cause malfunction to be caused by overflow or the like, by making a storage section's storage function and an infiltration section's flood control function be simultaneously performed even at the time of a huge amount of local rainfall, for example.SOLUTION: A pair of shafts 3, 4 apart from each other are provided in the ground 2. Storage sections 6, 7 capable of storing rainwater and an infiltration section 8 capable of infiltrating rainwater into the ground 2 are connected in parallel between the pair of shafts 3, 4. A circulation passage 71 for circulating and using the rainwater stored in the storage sections 6, 7 is connected between the pair of shafts 3, 4. A filter 74 for removing a foreign material and a pump 75 for transmitting and supplying water are also provided in the middle of the circulation passage 71.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rainwater facility.

  For example, for a detached house, a rainwater utilization facility is known in which rainwater that falls on the roof is stored in a tank embedded in the ground of the site, and can be used for watering etc. if necessary. (For example, see Patent Document 1)

JP 2010-106605 A

  However, since the rainwater utilization facility described in Patent Document 1 had only a function of collecting rainwater in a tank, it overflowed during local heavy rainfall such as so-called guerrilla heavy rain, and temporarily malfunctioned. There was a risk of waking up.

  Accordingly, the main object of the present invention is to solve the above-described problems.

In order to solve the above problems, the rainwater facility of the present invention is:
In the ground, while providing a pair of vertical shafts at intervals,
Between the pair of vertical shafts, a storage part capable of storing rainwater and an infiltration part capable of penetrating rainwater into the ground are connected in parallel.
Between the pair of vertical shafts, a circulation channel for circulating and using the water stored in the storage unit is connected,
A filter for removing foreign substances and a pump for feeding water are provided in the middle of the circulation flow path.

  According to the present invention, due to the above configuration, for example, even in the case of local heavy rainfall such as so-called guerrilla heavy rain, the storage function by the storage unit and the flood control function by the infiltration unit are performed at the same time. It is possible to make it difficult to cause malfunctions.

1 is an overall configuration diagram of a rainwater facility according to Example 1. FIG. It is a whole block diagram which shows the example (specific example 1) which actualized FIG. It is the longitudinal cross-sectional view which looked at the vertical shaft on the inflow side from the side. It is the longitudinal cross-sectional view which looked at the outflow side vertical shaft from the side. It is a side view of a spear joint. It is a side view of an eccentric pipe expansion joint. It is a side view of an eccentric pipe expansion spear joint. It is a side view of the main body (storage pipe) of a storage part. It is a fragmentary sectional view of a multilayer structure pipe. It is a perspective view of a spacer member. It is a front view of FIG. It is a whole block diagram which shows another specific example (specific example 2) of FIG. It is a side view of a rib pipe. It is an enlarged view of the rib part of FIG. The permeation | transmission part is shown, (a) is a side view, (b) is sectional drawing along the AA line, (c) is sectional drawing along the BB line. The container-shaped filter storage member which accommodated the filter inside is shown, (a) is a side view, (b) is a front view. The filter which attached the metal-mesh to the filter attachment member is shown, (a) is a front view, (b) is a side view.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 17 are for explaining this embodiment.

  <Configuration> The configuration will be described below.

(1-1) As shown in FIG. 1, the rainwater facility 1 of this embodiment is as follows.
That is, first, a pair of vertical shafts 3 and 4 are provided in the underground 2 with a space therebetween.
And between this pair of vertical shafts 3 and 4, the storage parts 6 and 7 which can store rainwater, and the permeation part 8 which can permeate rainwater into the underground 2 are connected in parallel.

  Here, the rainwater facility 1 has a water storage function and a water use function, and also has a flood control function, and effectively utilizes rainwater, and has recently developed abnormalities such as local heavy rainfall such as so-called guerrilla heavy rain. It is said to be a facility that can cope with the weather. The underground 2 can be anywhere under the road or under a site such as a park, facility or house. The vertical shafts 3 and 4 may be anything as long as they extend in the vertical direction. The storage units 6 and 7 may be anything as long as they can store rainwater. The infiltration part 8 may be anything as long as it can infiltrate rainwater into the ground 2.

  For example, in the case of the figure, the rainwater facility 1 is buried in the ground 2 of the cool spot 10 provided in the site of a facility such as a park or a playground. The cool spot 10 includes a simple resting place 11 or a waiting place by a eastern store or a pergola. A solar panel 12 is installed on the roof 11 a of the rest area 11. In addition, on the roof 11a and the wall surface 11b of the resting place 11, plants for roof greening and wall greening are planted around the solar panel 12 or in a portion where the solar panel 12 is not formed to form a green zone 13. ing. Alternatively, a mist spraying device 14 that sprays micromist or the like may be attached to the roof 11a of the rest area 11 or the like.

  And in the rainwater facility 1, the storage parts 6 and 7 are installed in two steps up and down in the underground 2, and the infiltration part 8 is installed in one stage on it. However, the number of installation stages of the storage units 6 and 7 and the permeation unit 8 is not limited to the above. In addition, although the positional relationship of the up-down direction of the storage parts 6 and 7 and the permeation | transmission part 8 is arbitrary, it is the storage part 6 arrange | positioned so that the storage parts 6 and 7 may become a lower side and the permeation | transmission part 8 may become an upper side. 7 and the penetrating part 8 are preferable.

  More specifically, as shown in the example of FIG. 2 (specific example 1), the vertical shafts 3 and 4 are mainly composed of resin pipes (vertical pipes 15), and the storage parts 6 and 7 are The resin pipe (horizontal tubular reservoir 16) extending in the lateral direction is formed, and the infiltration part 8 is configured by a resin tube (lateral tubular infiltration part 17) extending mainly in the lateral direction. In this case, the upper and lower horizontal tubular reservoirs 16 have the same diameter, and the horizontal tubular permeation unit 17 has a smaller diameter than the horizontal tubular reservoir 16. However, the caliber of the horizontal tubular storage part 16 and the horizontal tubular permeation part 17 can be appropriately changed according to the situation of the installation location. In this case, the vertical tube 15, the horizontal tubular storage portion 16, and the horizontal tubular permeation portion 17 have a circular cross section.

  The vertical shafts 3 and 4 are used as an inspection rod 19 having an open / close lid 18 attached to the upper end of the vertical pipe 15. In this case, the vertical shaft 3 located on the left side is used as the inflow side shaft, and the vertical shaft 4 located on the right side is used as the outflow side shaft. The vertical shaft 4 (outflow side shaft) is longer (deeper) than the vertical shaft 3 (inflow side shaft).

  As shown in FIG. 3, a bent portion 21 is provided at the lower end portion of the vertical pipe 15 constituting the vertical shaft 3 (inflow side shaft), and a saddle type joint 22 is provided on the outer peripheral surface above the bent portion 21. Can be attached as appropriate. The saddle type joint 22 is formed by integrating a cylindrical joint portion with a partial cylindrical saddle portion that can be contacted and fixed to the side surface of the vertical pipe 15. In this case, the saddle type joint 22 is smaller than the diameter of the horizontal tubular reservoir 16.

  Moreover, as shown in FIG. 4, the saddle type joint 23 similar to the above, the saddle type joint 24, etc. can be suitably attached to the outer peripheral surface of the vertical pipe 15 which comprises the vertical shaft 4 (outflow side shaft). It is like that. The saddle type joint 23 and the saddle type joint 24 of the vertical shaft 4 are installed so as to face the bent portion 21 and the saddle type joint 22 of the vertical shaft 3 at the same height. In this case, the saddle type joint 23 is the same as the diameter of the horizontal tubular reservoir 16, and the saddle type joint 24 is smaller than the diameter of the horizontal tubular reservoir 16. In addition, a water intake portion 25 is provided on the outer peripheral surface on the lower end side of the vertical shaft 4. The water intake 25 is provided at a position opposite to the lower saddle type joint 23 at a height substantially equal to or lower than the saddle type joint 23. Further, a mud reservoir 26 is formed at the bottom of the vertical shaft 4.

  Returning to FIG. 2, a rainwater basin 27 that collects rainwater from a side ditch of the road or a rainwater drainage pipe 29 provided in the site is connected to the upper portion of the vertical shaft 3 on the inflow side. . In addition, an overflow pipe 28 is connected to the upper part of the vertical shaft 4 on the outflow side so that overflowed rainwater can be discharged from the rainwater facility 1. In this case, the overflow pipe 28 is connected to, for example, a sewer main pipe.

  The lower storage portion 6 is connected between the bent portion 21 of the vertical shaft 3 and the saddle joint 23 on the lower side of the vertical shaft 4. Further, the upper storage section 7 is connected between the saddle type joint 22 of the vertical shaft 3 and the saddle type joint 24 of the vertical shaft 4 described above. Furthermore, a pipe top connection is made at one end of the upper storage section 7 with a spear joint 31 (see FIG. 5) for connecting the saddle joint 22 and the upper storage section 7 so that the top is flush. An eccentric tube expansion joint 32 (see FIG. 6) is attached.

  This spear joint 31 is, for example, a joint that is mainly used at a cut portion of a pipe, and is fitted deeply into one side of the cut portion, and after the state of the cut portion is adjusted, the amount of insertion into the cut portion on one side It is a joint that can repair the cut part by connecting both sides of the cut part by making the depth of the shallow. In this case, the joint is designed so that the fitting amount with respect to at least one of the saddle type joint 22 and the upper storage section 7 can be changed greatly. Instead of these, an eccentric pipe expanding joint 33 (see FIG. 7) having a structure in which the spear joint 31 and the eccentric pipe expanding joint 32 are combined and integrated may be used.

  In addition, an eccentric reduced tube joint 34 is attached to the other end portion of the upper storage portion 7 for connecting the tube bottom so that the bottom portion is flush with the bottom portion. The eccentric pipe joint 34 is obtained by inverting the above-described eccentric pipe joint 32 upside down and left and right. In addition, the splicing joint 31 and the eccentric pipe expanding splicing joint 33 have a rubber ring 35 for ensuring a sealing performance regardless of a change in the fitting amount inside the receiving portion on one end side, if necessary. Provided on the outer peripheral surface of the other end side of the opening portion is a mark line 36 or the like for representing the reference of the fitting depth.

  Thus, by using the eccentric pipe expansion joint 32 and the eccentric contraction pipe joint 34, the small saddle type joint 22, the saddle type joint 24, etc., the horizontal tubular reservoir 16 is made to be in a state in which the upper and lower intervals are reduced. Many can be installed.

  Furthermore, a multilayered structure tube 41 having excellent hydraulic properties, durability, and acid resistance can be used as a pipe member (storage tube) constituting the main body of the storage units 6 and 7 as shown in FIG. As shown in FIG. 9, this multilayer structure pipe 41 is a multilayer pipe member having an inner surface protection layer 42, an inner surface FRP layer 43, a resin mortar layer 44, an outer surface FRP layer 45, and an outer surface protection layer 46. It is. Each of the inner surface FRP layer 43 and the outer surface FRP layer 45 has a glass fiber layer 47 extending in the circumferential direction and a glass fiber layer 48 extending in the axial direction. The resin mortar layer 44 is made of an unsaturated polyester resin and silica sand.

  A spacer member 51 (refer to FIGS. 10 and 11) called a nozzle is installed between the storage unit 6 located on the lowermost side and the storage unit 7 on the upper side. The spacer member 51 has a function of holding the storage portions 6 and 7, and includes at least a lower member 53 having an arcuate recess 52 that matches the upper half of the lower storage portion 6, and an upper storage portion. It is assumed that an upper member 55 having an arcuate recess 54 that matches the lower half of the portion 7 is connected in an overlapping manner.

  In this way, by using the spacer member 51 to support the storage portions 6 and 7 with each other, the storage portions 6 and 7 are backfilled into the underground 2 one by one between the shafts 3 and 4. Since it is possible to construct the storage parts 6 and 7 in multiple stages with the necessary gaps and backfill them into the underground 2 at once without taking the trouble of installing them in order. Shortening can be achieved.

  Moreover, you may make it use the rib pipe 56 (refer FIG. 13) for the storage parts 6 and 7 like the example (specific example 2) of FIG. As shown in FIG. 14, the rib pipe 56 is a pipe having a large number of large and small ribs 57 and 58 along the axial direction on the outer peripheral surface. In this way, by using the rib pipe 56 for the reservoirs 6 and 7, the reservoirs 6 and 7 are backfilled in the ground 2 with crushed stone, so that the reservoirs 6 and 7 are securely fixed to the crushed stone by the ribs 57 and 58. Therefore, even when the surrounding groundwater level is high, or when a liquefaction phenomenon or the like occurs in the vicinity, the storage units 6 and 7 can be prevented from floating.

  Furthermore, as shown in FIG. 15A, the permeation portion 8 (lateral tubular permeation portion 17) having a horizontal tubular shape has a porous structure in which a large number of holes 61 (permeation holes) for underground penetration are formed on the peripheral surface. It is made a tube. In this case, the permeation section 8 has a portion in which three holes 61 are provided in the circumferential direction (top and bottom side surfaces) as shown in FIG. 15 (b), and a hole 61 as shown in FIG. 15 (c). The two portions (upper side surfaces) provided in the direction are alternately present in the axial direction. The infiltration part 8 has a smaller diameter than the storage parts 6 and 7 (lateral tubular storage part 16). Further, the infiltration portion 8 is between the saddle type joint 62 attached to the outer peripheral surface on the upper end side of the vertical shaft 3 and the saddle type joint 63 attached to the outer peripheral surface on the upper end side of the vertical shaft 4. 64 is used for connection.

  In parallel, the storage units 6, 7 and the permeation unit 8 may be arranged in any way, but in this case, the storage units 6, 7 and the permeation unit 8 arranged side by side in the horizontal direction are arranged in the vertical shafts 3, 4. It is preferable to line up with respect to the tube axis direction (vertical direction or substantially perpendicular to the ground surface). That is, it is preferable to arrange the storage portions 6 and 7 and the permeation portion 8 to overlap when the vertical shafts 3 and 4 are viewed from directly above.

  (1-2) And between the pair of vertical shafts 3, 4, a circulation channel 71 for circulating and using the water stored in the storage units 6, 7 is connected.

  Here, the circulation channel 71 is connected between the lower end side of one vertical shaft 4 and the upper end side of the other vertical shaft 3. For example, in FIG. 2, the circulation channel 71 is provided between the intake portion 25 of the vertical shaft 4 on the outflow side (right side in the drawing) and the storm drain 27 connected to the vertical shaft 3 on the inflow side (left side in the drawing). It is connected.

  And the circulation flow path 71 is installed so that the roof 11a and the wall surface 11b of the rest area 11 may be passed on the way. In this case, although not particularly illustrated, the circulation channel 71 is a roof 11a of the resting place 11, a cooling system for the solar panel 12, a system for watering plants in the green zone 13, and a mist spraying device. 14 are branched into a system to No. 14, and these are joined to a system for collecting water by a rain gutter attached to the roof 11a of the rest area 11 so as to be circulated.

  (1-3) A filter 74 for removing foreign substances and a pump 75 for feeding water are provided in the circulation channel 71.

  Here, the filter 74 is provided mainly for removing plants such as fine soil and algae. For example, as shown in FIG. 16, a container-like filter having a water passage hole 76a as shown in FIG. It is stored inside the storage member 76. In this way, by adopting a structure in which the filter 74 is stored inside the container-shaped filter storage member 76, the filter 74 can be easily attached and detached. Further, as shown in FIG. 17, the filter 74 may have a coarse mesh 78 attached so as to cover the water passage hole 76 a of the filter attachment member 77. In each of the above cases, the size and shape of the water passage hole 76a can be arbitrarily changed according to the purpose. For example, the water passage hole 76a can be configured by a large number of small holes.

  In this case, since the inflow rate is regulated by the pump 75, the filter 74 does not need an orifice function. That is, the filter 74 having no orifice function is used. However, the filter 74 needs to be disposed in front of the pump 75.

  Furthermore, as shown in FIG. 2, a water purification device 79 for purifying water can be installed between the filter 74 and the pump 75. The water purifying device 79 may be a bundle of hollow fiber membranes having a large number of fine holes. The water purifying device 79 can be replaced as a cartridge type, or can be backwashed and reused.

  (2) As shown in FIG. 4, the filter 74 is detachably attached to the vertical shaft 4 to which the inlet portion of the circulation channel 71 is connected.

  Here, the filter 74 is attached from the inside of the vertical shaft 4 so as to cover the water intake portion 25 attached to the lower end side of the vertical shaft 4. A holder 81 capable of mounting the filter 74 in the vertical direction is provided inside the vertical shaft 4. Further, on the upper part of the filter 74, a gripping part 82 for gripping or locking when attaching or detaching is provided as necessary.

  (3) As shown in FIG. 2, a heat exchanger 85 capable of exchanging heat with underground heat is provided in the middle of the circulation channel 71.

  Here, the heat exchanger 85 may be a heat collecting tube arranged in a loop shape. The heat exchanger 85 is preferably installed at a depth of about 5 meters underground where the temperature is stable throughout the year.

  (4) A water supply pipe 91 is connected to the storage units 6 and 7.

  Here, the water supply pipe 91 is auxiliary.

(5) The water supply pipe 91 can be opened and closed by the float valve 95.
The float valve 95 is opened at least when the water level in the reservoirs 6 and 7 is lower than a preset minimum water level.

  Here, the float valve 95 is an automatic valve that opens and closes the open / close valve by a float. The float is installed so that it floats up and down around the minimum water level. The float valve 95 is closed when the water level in the reservoirs 6 and 7 reaches a preset minimum water level. The water supply pipe 91 and the float valve 95 may be installed separately or may be installed together. The set minimum water level is appropriately determined according to the configuration of the rainwater facility 1. Specifically, the minimum water level is determined based on the water level of the storage unit 6 located at the lowest side.

  (6) The float valve 95 is provided in one of the pair of vertical shafts 3 and 4 or the storage portions 6 and 7.

  In this case, the float valve 95 is installed with respect to the longitudinal shaft 3 on the inflow side to which the outlet portion of the circulation channel 71 is connected directly or indirectly. Or the float valve 95 can be provided in the connection part of the vertical wells 3 and 4 and the storage part 6 located in the lowest side, or the inside of the storage part 6 located in the lowest side.

  <Effect> According to this embodiment, the following effects can be obtained.

  At the time of rainfall, rainwater enters the vertical shaft 3 of the rainwater facility 1 through a rainwater trough 27 that collects rainwater from a side ditch of the road or a rainwater drain pipe 29 provided in the site. It enters the vertical shaft 3 of the rainwater facility 1 through the rainwater channel 27 from (the rain channel provided in the middle), and is distributed from the vertical shaft 3 to the storage units 6, 7 and the infiltration unit 8. And the rainwater sent to the storage parts 6 and 7 is stored by the storage parts 6 and 7 and the lower part of the vertical shafts 3 and 4, and the rainwater sent to the infiltration part 8 is infiltrated into the underground 2 from the infiltration part 8. The

  At this time, rain water can be preferentially stored in the storage units 6 and 7 by installing the storage units 6 and 7 on the lower side and the infiltration unit 8 on the upper side. And, for example, when the storage parts 6 and 7 are full of water during local heavy rainfall such as so-called guerrilla heavy rain, rainwater enters the infiltration part 8 and permeates into the underground 2.

  (Operation effect 1-1) The storage parts 6 and 7 and the permeation part 8 were provided in parallel between the pair of vertical shafts 3 and 4. Thereby, the water utilization function by the storage parts 6 and 7 and the flood control function by the osmosis | permeation part 8 can be provided in one rainwater facility 1 simultaneously. Moreover, the storage parts 6 and 7 and the infiltration part 8 can be provided compactly between the pair of vertical shafts 3 and 4. Therefore, even a narrow installation space such as a so-called narrow land can be easily installed and used.

  That is, a pair of vertical shafts 3 and 4 are buried at intervals according to the installation space, and the required number of reservoirs 6 and 7 and infiltration portions 8 having a required diameter are respectively provided between the vertical shafts 3 and 4. By installing in parallel, the rainwater facility 1 having the optimum capacity according to the installation space and the purpose of use can be individually made.

  The water stored in the storage units 6 and 7 is sprayed, for example, in a disaster prevention base or a cool spot 10 (for example, an outdoor part of a facility or the like for measures against heat or heat stroke, etc. It can be used in a place equipped with the mist spraying device 14 configured to do so.

  And, for example, at the time of local heavy rainfall such as so-called guerrilla heavy rain, the storage function by the storage units 6 and 7 and the flood control function by the infiltration unit 8 are performed at the same time, making it difficult to cause malfunction due to overflow or the like Can do. Further, by providing the overflow pipe 28 so as to allow overflow to the sewer main, it is possible to prevent overflow by using the sewer main when necessary while suppressing the burden on the sewer main.

  (Effect 1-2) The circulation channel 71 was connected between the pair of vertical shafts 3 and 4. Thereby, rain water can be taken in using the circulation channel 71 at the time of rain. Further, when necessary, the water stored in the storage units 6 and 7 can be taken out from the circulation channel 71 and used as intermediate water. At this time, by circulating the water stored in the storage units 6 and 7, the water stored in the storage units 6 and 7 can be effectively used even with a small amount of water.

  Specifically, for example, the water stored in the storage units 6 and 7 can be repeatedly used as cooling water for the solar panel 12 by circulating the water in the circulation channel 71. Moreover, by taking out the water stored in the storage units 6 and 7 from the circulation channel 71, it can be used as a water supply source or a watering source for roof greening, wall greening, micromist, and the like.

  (Operation 1-3) A filter 74 and a pump 75 for removing foreign substances are provided in the middle of the circulation channel 71. Thus, the circulation channel 71 can be provided with a water supply function by the pump 75, and the water purified by the filter 74 can be supplied by the pump 75, thereby preventing the pump 75 and the circulation channel 71 from being clogged. can do.

  (Operation Effect 2) The filter 74 is detachably attached to the vertical shaft 4 on the entry side of the circulation channel 71. Thereby, the water can be purified by the filter 74 before entering the circulation channel 71. In addition, since the filter 74 can be replaced and cleaned through the vertical shaft 4, the maintainability of the filter 74 can be improved.

  (Operation Effect 3) A heat exchanger 85 is provided in the middle of the circulation flow path 71. Thereby, the water which flows through the circulation flow path 71 can be made into the temperature (heat exchange) equal to underground heat with the heat exchanger 85. Thus, cold water can be used in summer and warm water can be used in winter.

  (Effect 4) The water supply pipe | tube 91 was connected to the storage parts 6 and 7. FIG. Thereby, when the water level in the storage parts 6 and 7 becomes low, it is possible to supply fresh water to the storage parts 6 and 7 via the water supply pipe 91. Therefore, it is possible to always ensure the water used in the circulation flow path 71 so that the storage units 6 and 7 do not become empty.

  (Operation Effect 5) The water supply pipe 91 can be opened and closed by the float valve 95. As a result, when the water level in the storage units 6 and 7 becomes lower than the set minimum water level, the float valve 95 automatically opens, and the water from the water supply pipe 91 is supplied into the storage units 6 and 7. By replenishing, it is possible to keep the water level in the reservoirs 6 and 7 so that it does not become lower than the set minimum water level. And if the water level in the storage parts 6 and 7 becomes higher than the set minimum water level, the float valve 95 will be closed automatically and the replenishment of the clean water from the clean water supply pipe 91 will be stopped. Thereby, the effort which manages the water level in the storage parts 6 and 7 can be saved. When the float valve 95 is not provided, it is possible to adjust the water level by providing a water level sensor and a control valve.

  (Effect 6) The float valve 95 was provided in either of a pair of vertical shafts 3 and 4 or the storage parts 6 and 7. FIG. Thereby, the float valve 95 can be installed without difficulty in the structure, and the water level of the reservoirs 6 and 7 can be managed. The float valve 95 is preferably provided in one of the vertical shafts 3 and 4 in order to ensure maintainability.

As Example 2, instead of providing the permeation unit 8, only a plurality of storage units 6 and 7 may be provided.
That is, first, a pair of vertical shafts 3 and 4 are provided in the underground 2 with a space therebetween.
A plurality of reservoirs 6 and 7 capable of storing rainwater are connected in parallel between the pair of vertical shafts 3 and 4.
And between the pair of vertical shafts 3, 4, a circulation channel 71 for circulating and using the water stored in the storage units 6, 7 is connected.
Further, a filter 74 for removing foreign substances and a pump 75 for feeding water are provided in the circulation channel 71.

  The configuration other than the above is the same as in the above-described embodiment. Therefore, when necessary, the description of the above embodiment can be used as the description of this embodiment.

  According to this embodiment, it is possible to obtain effects other than the function of the permeation portion 8 described above.

  As mentioned above, although embodiment of this invention has been explained in full detail with drawing, embodiment is only an illustration of this invention. Therefore, the present invention is not limited only to the configuration of the embodiment, and it goes without saying that design changes and the like within a scope not departing from the gist of the present invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. In addition, in the case where a plurality of examples and modifications are disclosed in the embodiment as those of the present invention, possible combinations of combinations extending over these are included even if not specifically described. Of course. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Rainwater facility 2 Underground 3 Vertical shaft 4 Vertical shaft 6 Reservoir 7 Reservoir 8 Infiltration portion 71 Circulation flow path 74 Filter 75 Pump 85 Heat exchanger 91 Water supply pipe 95 Float valve

Claims (7)

In the ground, while providing a pair of vertical shafts at intervals,
Between the pair of vertical shafts, a storage part capable of storing rainwater and an infiltration part capable of penetrating rainwater into the ground are connected in parallel.
Between the pair of vertical shafts, a circulation channel for circulating and using the water stored in the storage unit is connected,
A rainwater facility comprising a filter for removing foreign substances and a pump for supplying water in the middle of the circulation channel. In the ground, while providing a pair of vertical shafts at intervals,
A plurality of reservoirs capable of storing rainwater are connected in parallel between the pair of vertical shafts,
Between the pair of vertical shafts, a circulation channel for circulating and using the water stored in the storage unit is connected,
A rainwater facility comprising a filter for removing foreign substances and a pump for supplying water in the middle of the circulation channel. A rainwater facility according to claim 1 or claim 2,
A rainwater facility, wherein the filter is detachably attached to a vertical shaft to which an inlet portion of the circulation channel is connected. A rainwater facility according to any one of claims 1 to 3,
A rainwater facility characterized in that a heat exchanger capable of exchanging heat with underground heat is provided in the middle of the circulation channel. A rainwater facility according to any one of claims 1 to 4,
A rainwater facility, wherein a water supply pipe is connected to the reservoir. The rainwater facility according to claim 5,
The water supply pipe can be opened and closed by a float valve,
The rainwater facility characterized in that the float valve is opened at least when the water level in the reservoir is lower than a set minimum water level. The rainwater facility according to claim 6,
A rainwater facility, wherein the float valve is provided in one of a pair of vertical shafts or a reservoir.