JP2000104294A - Rainwater storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store only effectively usable neutral rainwater without collecting acid rainwater by removing dust and dirt in air or piled on a roof contained in the rainwater with no power for utilizing a natural energy. SOLUTION: A rainwater storage device 1 removes dust and dirt by rotating a filter device 2 by hydraulic pressure of rainwater flowing through a conduit 41. A part of the filtered water is introduced to a controller 6 of a switch valve 5. Before it rains a prescribed quantity or more sufficiently for removing rainwater contaminated by the dust and the dirt floating in air or oxidized by NOX in the initial stage of raining to some extent, the filtered water introduced from the conduit 42 is discharged from a drain pipe 11. After raining a prescribed quantity a switch valve 5 is switched by a controller operated by reaching a prescribed precipitation so that the rainwater storage device 1 stores the filtered water becoming neutral in a storage tank 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater storage device for effectively using rainwater, and more particularly, to a method for storing only neutral rainwater by removing acid rainwater mixed with NOX or the like. It relates to a rainwater storage device that can be used.

[0002]

2. Description of the Related Art Conventionally, there is a rainwater storage device that effectively uses rainwater. The rainwater stored by the rainwater storage device is used for fire prevention / disaster prevention water, cleaning, watering plants and plants, and washing toilets.

[0003] Such a rainwater storage device includes a rain gutter receiving rainwater that has fallen on a roof, a filtering device that removes dust and dirt from the rainwater flowing down from the rain gutter, and a conduit that guides the rainwater to a water storage tank. Some include a water storage tank for storing filtered rainwater, a supply mechanism for supplying the stored rainwater to the outside, and a drain pipe for draining surplus water in the water storage tank.

However, in such a rainwater storage device, dust and dirt that cannot be completely removed by the filtration device are introduced into the water storage tank, and unfiltered dust and dirt accumulate at the bottom of the water storage tank. However, this deposit interferes with the supply mechanism. Even if the supply mechanism is not hindered, there is a problem in that the use of water containing sediment for cleaning a toilet or the like causes clogging of pipes and contaminating the toilet or the like. Further, even if the filtration device can remove dust and dirt, it cannot remove acid rainwater mixed with NOx or the like generated by soot in the air or components in exhaust gas of automobiles. Therefore, in the above-mentioned rainwater storage device, there is a possibility that the operation failure of the device may be caused by the acid rainwater. Furthermore, since dust and dirt stay in the filtering portion of the filtering device, the filtering function is reduced, and eventually the filtering portion is clogged, and rainwater is not guided to the water storage tank. In order to prevent such clogging, the rainwater storage device requires regular maintenance, and has a problem that maintenance and management costs are required.

In order to solve the above problems, Japanese Patent Publication No. Sho 61
Japanese Patent No. 23328 proposes a rainwater storage device that removes rain at the beginning of falling containing a lot of dust and dirt without taking it into the device and adds a mechanism to take rainwater into the device after a certain period of time. I have. Furthermore, Tokiko Sho 61-2
Japanese Patent No. 3328 also proposes a rainwater storage device that adjusts the amount of rain without using power. In this rainwater storage device, a space is provided between the funnel and the partition wall, and when a certain amount of rain continues, the amount of rain coming from the funnel becomes larger than the amount of drainage, so that rainwater flows into the intake pipe above the funnel. Is configured.

[0006]

[Problems to be solved by the invention]
No. 23328 discloses a rainwater storage device,
There are the following problems. (1) In the former rainwater storage device, rainwater is introduced into the water storage tank after a certain period of time after the rain starts falling. Therefore, for example, in the case of light rain, there is a problem that acidic rainwater containing dust and dirt is guided to the water storage tank, and only the rainwater that can be effectively used cannot be collected in the water storage tank. On the other hand, when heavy rain like squall falls, rainwater is guided to the water storage tank after a certain period of time, so that dust or dust etc. already accumulated in the atmosphere or on the roof was not included before the certain period of time. Neutral rainwater, which has become available for use after rainwater and acid rainwater have fallen, is drained until a certain period of time elapses, and there is a problem of wasting rainwater to be stored.

(2) The former rainwater storage device is provided with a bypass pipe for bypassing rainwater in the early stage of rainfall, and the bypass is switched after a certain period of time from the start of rainfall by combining a rainfall sensor and a timer. The use of a three-way valve is disclosed. However, since a power source is required to operate the three-way valve, there is a problem that the use of the former rainwater storage device is extremely limited.

(3) In the latter rainwater storage device disclosed in JP-B-61-23328, a sufficient space is provided between the funnel and the partition because the funnel and the partition are formed in a conduit. There is a problem that it is not possible to secure it and it is not possible to completely eliminate the dirty rain that has begun to fall.

The present invention has been made in view of the above circumstances, and uses no natural power to remove dust and dirt accumulated in the air or on a roof or the like contained in rainwater from the rainwater. It is an object of the present invention to provide a rainwater storage device capable of storing only neutral rainwater that can be effectively used without collecting acid rainwater without collecting it in a water storage tank.

[0010]

Means for Solving the Problems To achieve the above object, a rainwater storage device of the present invention has the following configuration. (1) A rainwater storage device including a tank for storing rainwater, a switching valve provided on a water pipe for guiding the rainwater to the water storage tank, and a control device for controlling the switching valve, wherein the control device has a predetermined rainfall. It is characterized in that rainwater is drained until a certain time, and after a predetermined amount of rainfall, the switching valve is switched to guide the rainwater to the water storage tank.

(2) In the rainwater storage device, the predetermined rainfall amount is integrated and stored only when there is a rainfall amount equal to or more than a predetermined amount per unit time.

(3) In the rainwater storage device, the control device includes a sprocket directly connected to the switching valve, a weight having a predetermined weight attached to one end of a chain around which the sprocket is wound, and a sprocket connected to the other end of the chain. It has a small tank with an orifice hole formed in the bottom surface, and a conduit for guiding rainwater to the small tank.

(4) The rainwater storage tank has a semi-fixed or fixed throttle mechanism on the conduit for guiding rainwater to the small tank.

(5) The rainwater storage device has a permanent magnet for holding the weight at a predetermined position.

(6) In the rainwater storage device according to any one of (1) to (5), the switching valve is disposed in the conduit, and the switching valve is changed according to a weight change of the small tank. Switch between storage and drainage.

(7) In the rainwater storage device according to any one of (1) to (5), the switching valve may be configured to move the axis of the conduit relative to the conduit by a change in weight of the small tank. It rotates around the center and switches between water storage and drainage.

(8) In the rainwater storage device described in (7), the switching valve includes a guide pipe and a movable body, and the guide pipe and the movable body sandwich a strainer.

(9) In the rainwater storage device described in (1), a cylindrical valve is provided at one end of the conduit provided with the switching valve to remove dust and dirt contained in rainwater. A rotatable net, and has a filtering device for holding dust and dirt on the outer periphery of the net and removing the dust by rotation of the net.

Next, the operation of the rainwater storage device having the above configuration will be described. Rainwater that has begun to fall on expressways, buildings, etc. passes through conduits that lead to water storage tanks. At this time, the rainwater passes through a filtering device provided on the conduit. Garbage and the like contained in the rainwater catch on the net of the filtering device. At this time, since the mesh of the filtering device is cylindrical and rotatably provided, the mesh is rotated by the pressure of rainwater flowing through the conduit, and dust and the like are shaken off the mesh by the centrifugal force. The garbage and the like that have been shaken off flow into the drainage pipe together with the rainwater that has not passed through the filtering device, and therefore do not remain in the conduit. Thus, the filtration device and conduit do not require regular maintenance.

The rainwater from which dirt and the like have been removed passes through a net and is guided to a switching valve. When rain starts to fall, the switching valve closes the water storage tank side and opens the drain pipe side.
Therefore, the rainwater in the early stage of rainfall is drained.

Part of the rainwater that has passed through the net is guided to the control device. The rainwater guided to the control device is guided to a small tank having an orifice hole formed on the bottom surface. Since the rainwater guided to the small tank has a strainer at the entrance of the small tank, dust and the like that have passed through the filtering device are removed and collected in the small tank. Since the orifice hole is formed in the bottom of the small tank, the collected rainwater leaks from the orifice hole.If the inflow is larger than the leaked amount, the rainwater is accumulated and the rainwater is accumulated in the small tank. Is stored. Here, the small tank is provided at one end of a chain around which a sprocket is wound, and a weight held by a permanent magnet is provided at the other end of the chain. Small tanks are lighter than weights, and the weights are always held by permanent magnets. When the weight of the small tank storing rainwater becomes heavier than the weight attached to the other end of the chain and exceeds the holding force of the permanent magnet, the switching valve is switched to open the water storage tank side, and the rainwater is released. Water is guided to the water storage tank. That is, the amount of rain that is stored in the small tank and lifts the weight becomes the predetermined amount of rain. When the rain stops and rainwater flows out of the orifice hole, the rainwater in the small tank becomes lighter than the weight,
The weight returns to the predetermined position at the beginning of rainfall, and the switching valve closes the water storage tank side and returns to the state where the drain pipe side is opened. Further, since the weight is held at a predetermined position by the permanent magnet, the switching valve does not move unnecessarily.

Therefore, the rainwater storage device of the present invention can operate the filter device, the switching valve, and the switching valve control device, which are constituted by a circular rotatable net, without power supply. Furthermore, the rainwater storage device of the present invention can store only near-neutral rainwater excluding dust, dirt, and acid rainwater in the water storage tank. Therefore, the rainwater storage device of the present invention can store neutral rainwater without power supply, and can effectively utilize rainwater regardless of the installation location. For example, watering of vegetation on the median strip of a highway, which was previously considered difficult to water, is possible.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a rainwater storage device according to the present invention will be described in detail with reference to FIGS. In the first embodiment, dust, dust, acid rainwater, and the like can be removed from rainwater that has fallen on a place without a power source, particularly an expressway, and the like can be stored in the water storage tank. A rainwater storage device that can effectively use rainwater, such as watering plants in the median strip of the road, will be realized. FIG. 1 is a diagram showing the entire configuration of the rainwater storage device 1. The device 1 includes a filtering device 2 for removing dust and dirt from rainwater collected from a highway 17, a water storage tank 3 for storing neutral rainwater not containing dust, dust, and acid rainwater, and a filtering device 2. A conduit 4 for directly connecting the water tank 3 to the water storage tank 3; a switching valve 5 provided on a conduit of the conduit 4; and a control device 6 for controlling the switching valve 5.

FIG. 2 is an enlarged view of the filtration device 2 of FIG.
FIG. 3 is a cross-sectional view of the net 23 of FIG. 2 as viewed from above. As shown in FIGS. 2 and 3, the filtering device 2 is connected to the highway 17.
The conduit 41 into which the rainwater collected in the above flows is located at a branch point where the conduit 41 branches into the drain pipe 7 and the conduit 42 for guiding filtered water to the switching valve 5. Around the branch point where the conduit 41 branches into the drainage pipe 7 and the conduit 42, a cylindrical space 9 having a size in which the filtration device 2 can be installed is secured. The filtering device 2 is arranged in the space 9 so that rainwater flows into the upper part. In the space 9, there is a shaft 21 penetrating through the conduit 4, and a pair of disks 22 is provided near both ends of the shaft 21. A net is stretched in a cylindrical shape around the outer periphery of the disk 22 to form a net 23, which is provided to be rotatable about a shaft 21. The shaft 21 may be rotatably supported together with the main body of the filtration device 2. Further, a conduit 8 for guiding filtered water to the small tank 61 of the control device 6 is formed at a lower portion of the filtration device 2 and is branched from the conduit 42. Also,
A receiving tray 42a is formed in the conduit 42 so that the filtered water can be easily introduced into the conduit 8.

The above-described structure of the filtering device 2 operates as follows. That is, since the filtering device 2 is positioned so that rainwater flowing from the conduit 41 hits the upper portion of the filtering device 2, the mesh 23 provided rotatably about the shaft 21.
Rotates in the direction A due to the pressure of the rainwater flowing from the conduit 41. The mesh body 23 removes dust and dirt from the rainwater while rotating in the direction A, and guides the filtered water that has passed through the stitches of the mesh body 23 to the conduit 42. The dust and dirt attached to the net 23 are A
The water is shaken off the net 23 by the centrifugal force of the net 23 rotating in the direction, and is flown to the drain pipe 7 together with the rainwater not guided to the conduit 42 to be removed. Here, since the space 9 and the filtering device 2 are sealed, even if centrifugal force acts on the net 23, dust, dust, and the like are not shaken to a place other than the drain pipe 7.

The filtered water is guided to the switching valve 5 through the conduit 42. FIG. 4 is an enlarged view of the valve portion 51 of the switching valve 5,
FIG. 5 is a sectional view taken along the line BB of FIG. The valve portion 51 is provided with a conduit 42 for guiding the filtered water to the switching valve 5, and the filtered water is supplied to the storage tank 3
It is installed at a branch point where it branches into a conduit 43 for guiding water to the drain and a drain pipe 11 for draining filtered water. Further, the valve portion 51 includes a shut-off plate 51a and a shut-off plate 51a that are large enough to block rainwater flowing from the conduit 42 when the switching valve 5 is switched so as not to guide the rainwater to the conduit 43 or the drain pipe 11. Shaft 51b that rotates while holding
And a pair of solid bearings 51c supporting the shaft 51b
And a reinforcing plate 51d that reinforces holding of the blocking plate 51a and the shaft 51b so as to withstand the pressure of rainwater flowing from the water pipe 42. Blocking plate 5
1a and the reinforcing plate 51d are crossed and welded.

FIGS. 6 and 7 are enlarged views of the switching valve control device. The switching valve 5 is operated and switched according to a predetermined rainfall amount that is accumulated only when the control device has a predetermined rainfall amount or more per unit time. The switching valve 5 is located at a branch point where the conduit 42 branches into the conduit 43 and the drain pipe 11. The switching valve 5 serves as a stopper so that the shutoff plate 51a is not pushed in the flowing water direction by the pressure of rainwater flowing through the water pipe 42 when the valve 51 is switched. A projection 52 for preventing the filtered water flowing from 42 from leaking;
And a shock absorber 53 made of rubber or the like for reducing a shock when the projection 1a collides with the projection 52.

The control device 6 is connected directly to one end of the shaft 51b of the valve portion 51 to control the switching valve 5. Control device 6
A sprocket 66 directly connected to the shaft 51b of the valve portion 51, a chain 67 wound around the sprocket, a small tank 61 provided at one end of the chain 67, and a weight 68 provided at the other end of the small tank 61. And a permanent magnet 69 for fixedly holding the weight 68 at a predetermined position. The small tank 61 is connected to the conduit 8 provided to branch off from the conduit 42. A part of the filtered water that has passed through the mesh 23 of the filtration device 2 flows into the small tank 61 through the semi-fixed needle valve 10 configured for the purpose of time adjustment on the conduit 8. Part of the filtered water that has flowed into the small tank 61 is stored in the small tank 61 after the remaining dust and dirt are removed from the strainer 62 at the entrance of the small tank 61. A hollow tube 64 is provided at the bottom of the small tank 61. Hollow tube 64
Is connected to the atmosphere by being placed slightly higher than the inner bottom surface to avoid clogging due to sediment. And
By a fixed throttle 65 provided in the hollow tube 64, a fixed amount of filtered water in the small tank 61 leaks out of the small tank 61 for a certain period of time.

The structure of the switching valve 5 and the control device 6 operates as follows. That is, the shut-off plate 51 a in the valve portion 51 of the switching valve 5 is a disk having a size capable of closing the conduit 43 and the drain pipe 11.
Further, since the projection 52 is provided on the drain pipe 11, the filtered water does not leak into the conduit 43 or the drain pipe 11 in which the switching valve 5 is closed.

The difference between the fixed amount of leakage from the fixed throttle 65 and the amount of filtered water flowing through the semi-fixed needle valve 10 determines whether or not rainwater is stored in the small tank 61. That is, if the amount of leakage from the fixed throttle 65 is larger than the amount of filtered water flowing through the semi-fixed needle valve 10, the filtered water is not stored in the small tank 61. On the other hand, if the inflow amount passing through the semi-fixed needle valve 10 is larger than the leakage amount from the fixed throttle 65, the filtered water is stored in the small tank 61. When the amount of water stored in the small tank 61 increases and is stored in a predetermined amount or more, the weight of the small tank 61 becomes heavier than the weight 68 installed at the other end of the chain 67, and the weight 68 is a permanent magnet 69 that is fixed and held. Freed from the rise. The amount of rain in the small tank 61 that releases the weight 68 from the permanent magnet 69 is a predetermined amount of rain accumulated only when there is a predetermined amount of rain per unit time or more.

When the weight 68 is pulled by the small tank 61 and rises, the sprocket 66 meshing with the chain 67 rotates, and the shaft 51b of the valve portion 51 of the switching valve 5 directly connected to the sprocket 66 rotates. FIG.
As shown in FIG. 7, the switching valve 5, which has opened the drain pipe 11 so as to drain the filtered water, closes the drain pipe 11 to open the conduit 43 as shown in FIG. Is switched. As a result, the predetermined rainfall is drained, and the rain continuing after the predetermined rainfall rainfall is reduced to the water storage tank 3.
Stored in

Since the rainwater is constantly drained from the fixed throttle 65 formed at the bottom of the small tank 61, even if the rain stops and the filtered water no longer flows from the conduit 8 into the small tank 61, the small tank 61 The water stored in 61 is a fixed throttle 65
Continue to be discharged to the outside. When the weight of the stored rainwater and the small tank 61 becomes lighter than the weight of the weight 68, the weight 68 is automatically lowered and again held at a predetermined position by the permanent magnet 69, and as shown in FIG. Also, the conduit 43 is closed and the drain pipe 11 is returned to the open state. Here, when a small amount of rain falls and the amount of rainfall changes, when the small tank 61 and the weight 68 are balanced, the permanent magnet 69 holds the weight 68 at a predetermined position. From right and left between the conduit 43 and the drain pipe 11 can be avoided.

As shown in FIG. 1, the water storage tank 3 includes a strainer 12 for removing dust and dirt remaining in the filtered water introduced from the conduit 43, and an overflow for draining rainwater to the outside when the water is excessively stored. A pipe 13; an air back pipe 14 for preventing rainwater from spoiling if there is an air source; a supply pipe 15 for supplying rainwater from the water storage tank 3;
Is provided with a mud discharge valve 16 for removing deposits deposited at the bottom of the.

The above structure of the water storage tank 3 operates as follows. That is, dust, dust, and the like that have not been removed by the filtration device 2 due to the function of the strainer 12 are removed before being stored in the water storage tank 3, so that dust, dust, and the like hardly accumulate on the bottom of the water storage tank 3. Even if dust or dirt accumulates on the bottom of the water storage tank 3, the sediment can be removed from the drain valve 16. Further, the rainwater in the water storage tank 3 does not rot due to the function of the air back pipe 14. Furthermore, since the overflow pipe 13 is formed, a certain amount or more of rainwater is not stored in the water storage tank 3, so that the stored rainwater does not flow backward through the conduit 4. The reservoir is irrigated from a supply pipe 15 to an implant 18 in a median strip of a highway 17. In order to improve the water quality, the upper part of the water storage tank 3 is a large space, and even if a micro filter of an antimicrobial agent and a turbidity preventing degree is provided on a wire mesh (not shown) to a required area. Good.

Next, the effect of the rainwater storage device 1 will be described. (1) In the prior art, since the control device is operated for a predetermined time, there is a problem that neutral rainwater to be stored is drained, and acid rainwater not to be stored is stored in the storage tank.
Further, in the related art, a valve is provided in a conduit to control rainfall. However, it has been difficult to secure a space for storing rainfall capable of reliably removing acid rain. However, in the first embodiment, the flow rate of the filtered water that has passed through the semi-fixed needle valve 10 provided in the conduit 8 to the small tank 61 is reduced by the fixed throttle 65 provided at the bottom of the small tank 61. When the amount of leakage exceeds the amount of leakage, rainwater is stored in the small tank 61. When the weight of the stored small tank 61 becomes heavier than the weight 68, the switching valve 5 is switched to guide rainwater to the water storage tank 3 as shown in FIG.
Therefore, in the present embodiment, the predetermined rainfall amount that is integrated only when the rainfall amount is equal to or more than the predetermined amount per unit time is determined, and the switching valve 5 is switched according to the predetermined rainfall amount.
The acid rainwater is not guided to the water storage tank 3, and the rainwater in the water storage tank 3 is kept at near neutral rainwater from which dust and dirt are removed. Further, in the first embodiment, since the predetermined rainfall is stored in the small tank 61 of the control device 6 provided outside the conduit 4, a space for storing the rainfall that can completely remove the acid rainwater is secured. I have. Further, when the rain stops, rainwater continues to be drained from the fixed throttle 65 of the small tank 61, and when the weight of the small tank 61 for storing rainwater becomes lighter than the weight of the weight 68, the switching valve 5 automatically switches the water pipe. It returns to the state where the eleventh side is closed. Therefore, the rainwater storage device 1 can store near-neutral rainwater without power each time a predetermined amount of rainfall occurs. Further, since the amount of rainwater flowing into the small tank is adjusted to be constant by the semi-fixed needle valve 10, the control device 6 can be operated regardless of the amount of precipitation.

(2) The shut-off plate 51a of the valve portion 51 of the switching valve 5 is a disk large enough to close the conduit 43 and the conduit 11, and the conduit 43 is formed with the projection 52. Acid rainwater in the initial stage of rainfall, which has been guided from 42, leaks from the switching valve 5 and is not guided to the water storage tank 3. On the other hand, since the projection 52 is also provided on the drain pipe 11, the neutral rainwater that has flowed down from the conduit 42 and has fallen by a predetermined amount is not drained, and the neutral rainwater is not wasted. Therefore, the rainwater storage device 1 according to the first embodiment eliminates the cause of malfunction of the device 1 and acid rainwater that hinders the growth of vegetation, and stores only neutral rainwater in the water storage tank 3. It is effective for effective use of rainwater.

(3) The filtering device 2 which is formed of a rotatable mesh on a cylinder is formed on the net 23 by centrifugal force generated when the filtering device 2 rotates in the same direction A as the flowing direction of rainwater. Since the attached dust and dirt are shaken off and removed, the net 23 and the inside of the conduit 4 are always kept in a clean state, and regular maintenance is not required.

Therefore, the operation of the filtering device 2 and the control device 6 according to the first embodiment does not require a power source because natural energy such as water pressure and weight of rainwater when rainwater flows through the conduit is used. Therefore, even in a place where it is difficult to secure a power supply, the rainwater storage device 1 can be installed and rainwater can be effectively used. In addition, since the control device operates according to the predetermined rainfall, neutral rainwater can be stored without waste and can be effectively used.

Next, a second embodiment of the rainwater storage device of the present invention will be described. The rainwater storage device of the second embodiment differs from the rainwater storage device 1 of the first embodiment only in the configuration of the switching valve, and the other portions have the same configuration, operation, and effect. Therefore, here, the switching valve portion will be described, and detailed description of the other portions will be omitted. FIG.
FIG. 7 is a front view of a switching valve unit according to a second embodiment.
FIG. 9 is a top view of FIG. FIG. 10 is a central longitudinal sectional view of FIG. As shown in FIG. 10, a conduit 42 is inserted into the upper end surface of the cylindrical guide pipe 101. At the lower end of the guide pipe 101, a hollow cylindrical large-diameter cylindrical portion 102a and a hollow cylindrical small-diameter cylindrical portion 102a are formed.
and a movable body 102 composed of a. A strainer 104 is sandwiched between the guide pipe 101 and the movable body 102. A bent movable pipe 105 is fitted and fixed to the lower end of the movable body 102. A cover 106 is provided at the lower end of the movable pipe 105. The cover 106 covers the opening of the water storage pipe when the movable pipe 105 is arranged on the drain pipe, so that dust does not enter the water storage pipe. Here, the movable body 1
The small-diameter cylindrical portion 102b of 02 is rotatably held by a bearing portion 30 fixed to a wall via a bearing 31.

Further, as shown in FIG.
One end of a conduit 108 is inserted into the lower end of the large-diameter cylindrical portion 102a. Conduit 1 disposed in movable body 102
A tray 108a is formed at the end of 08 so that rainwater guided from the conduit 42 can be easily collected. On the other hand, the other end of the conduit 108 communicates with the small tank 161 as shown in FIG. The conduit 108 is provided with a needle valve 109 configured for time adjustment. A pair of rod-shaped levers 110X and 110Y are horizontally protruded from the outer periphery of the lower end of the large-diameter cylindrical portion 102a of the movable body 102. As shown in FIG. 9, the first and second levers 110X and 110Y have the same axis, and the axis passes through the center of the large-diameter cylindrical portion 102a.

As shown in FIG. 9, the first and second levers 11
0X and 110Y are first and second support plates 1 suspended from a wall.
11X and 111Y respectively. A shaft 112 is mounted on the tip of each of the first and second support plates 111X and 111Y. Further, the first and second support plates 111X, 111
At the center of Y, a concave portion 111a that defines the movable range of the movable body 102 is formed. That is, the movable body 102
Is that the first and second levers 110X and 110Y are the first and second levers.
It can rotate until it is locked on the side surface of the concave portion 111a of the support plates 111X and 111Y.

At both ends of the shaft 112, a pair of sprockets 1
13X and 113Y are rotatably held. First,
The first and second sprockets 113X and 113Y have first and second sprockets.
Chains 114X and 114Y are mounted. As shown in FIGS. 8 and 9, the first chain 114X has one end at the left end of the first lever 110X and the other end at the small tank 16X.
1 fixed. A fixed throttle 165 for discharging a certain amount of rainwater to the outside at a certain time is provided on the bottom of the small tank 161.
Is provided. The rainwater discharged from the fixed throttle 165 is drained to the fixed throttle drain pipe 32 disposed below the small tank 161. On the other hand, the second chain 114Y
Has one end fixed to the right end of the second lever 110Y and the other end fixed to the weight 168. Below the weight 168, a permanent magnet 1 that holds the weight 168 at a predetermined position
69 are provided.

The switching valve section having the above configuration operates as follows. Before the rainfall, the weight 168 is held at a predetermined position by a permanent magnet 169, as shown in FIG. And the movable piping 105 is arrange | positioned on the drainage pipe. At this time, the opening of the water storage pipe is
No dust is mixed into the water storage tank. When the rain starts, rainwater is introduced from the conduit 42.
Part of the rainwater from which trash etc. has been removed by the strainer 104 is
Water is guided from the receiving tray 108a to the small tank 161. Rainwater not guided to the conduit 108 is drained to a drainpipe as it is. The amount of water introduced from the conduit 108 is a fixed throttle 165
When the amount of water discharged from the tank increases, rainwater starts to be stored in the small tank 161. From the beginning of rainfall until the predetermined amount of rain is stored in the small tank 161, the movable pipe 105 is on the drain pipe, and the rainwater is drained.

When a predetermined amount of rain is stored in the small tank 161, the weight 168 is separated from the permanent magnet 169. Then, the small tank 161 pulls the first lever 110X toward the shaft 112 via the first chain 114X. Along with this, the movable body 102 rotates in the direction C (see FIG. 9).
At this time, the movable pipe 105 located at the position shown in FIG. 8 moves toward the water storage pipe, that is, in the direction A. First lever 110
When X is locked to the side surface of the concave portion 111a on the shaft 112 side,
The rotation of the movable body 102 stops. At this time, the movable pipe 10
5 is disposed above the water storage pipe, and rainwater is guided to the water storage tank.

When the rainfall ends or when light rainfall occurs, conduit 1
The amount of water discharged from the fixed throttle is larger than the amount of water introduced from 08. When the weight of the small tank 161 becomes lighter than the weight 168, the permanent magnet 169 attracts the weight 168. At this time, the second chain 114Y pulls the second lever 110Y toward the shaft 112, and the movable body 102 rotates in the direction D (see FIG. 9). Then, the movable pipe 105 moves from the water storage pipe to the drain pipe, that is, in the direction B (see FIG. 8). The second lever 110Y is connected to the shaft 112 of the concave portion 111a.
When the movable body 102 is stopped by the side surface, the rotation of the movable body 102 stops, and the movable pipe 105 is disposed on the drain pipe. And
The opening of the water storage pipe is covered with a cover 106.

The switching valve of the second embodiment has the following effects. Since the main part of the switching valve portion is constituted by a commercially available pipe material, the cost can be reduced. That is, since it is not necessary to mold the constituent members of the switching valve portion in accordance with the inner diameter of the conduit, the capital investment amount of the mold becomes unnecessary, and the cost can be reduced. Further, since the component of the switching valve portion is not provided in the conduit 42, a load due to water pressure is not applied to the switching valve portion, and the switching operation of drainage and storage of water is stabilized. Further, since the strainer 104 is sandwiched between the guide pipe 101 and the movable body 102,
By simply sliding the guide pipe 101, the strainer 104 can be maintained. Therefore,
Maintenance can be performed regardless of the contractor, and maintenance costs are not required. In addition, since the cover 106 that covers the opening of the water storage pipe is provided at the lower end of the movable pipe 105 when water is not stored, it is possible to always prevent dust from being mixed into the water storage tank.

The present invention is not limited to the above embodiment, but can be implemented as follows without departing from the spirit of the invention. For example, in the present embodiment, the filtration device 2 is formed by a shaft 21, a pair of disks 22 provided at both ends of the shaft 21, and a mesh 23 on a rotatable cylinder. The same applies to a case where a wire mesh or a slit-shaped strainer along a streamline is used for a part of the conduit 41 into which rainwater flows from a road.

[0048]

According to the first aspect of the present invention, there is provided a rainwater storage device.
A rainwater storage device having a tank for storing rainwater, a switching valve provided on a conduit for guiding the rainwater to the water storage tank, and a control device for controlling the switching valve, wherein the rainwater is drained until a predetermined rainfall is reached. Then, after a predetermined rainfall falls, the switching valve is switched to guide rainwater to the water storage tank. Therefore, the rainwater storage device of the present invention can maximally eliminate acidic rainwater including NOX in the early stage of rainfall in the case of light rain, and prevent unnecessary drainage of neutral rainwater in the case of heavy rain. Can be. Therefore, the effect of storing neutral rainwater in the water storage tank without waste regardless of the amount of precipitation is obtained. In addition, since the switching valve is operated by a predetermined rainfall amount, an effect that a power source is not required is exhibited.

According to a second aspect of the present invention, the rainwater storage device of the present invention is characterized in that the predetermined amount of rainfall is integrated only when the amount of rainfall exceeds a predetermined amount per unit time. . The rainfall is accumulated in the small tank only when there is more than a predetermined amount of rainfall per unit time, so in the case of light rain, the amount of rainwater leaking from the small tank is Rainwater is not integrated because it is larger than the inflow, but rainfall is integrated because the amount of water flowing into the small tank is greater than the amount of leakage from the small tank during heavy rainfall, and the rainwater is integrated and a kind of water timer works. The amount of water flowing into the small tank is adjusted as a timing for switching the switching valve in a snap action manner at a time when the rainwater will be reduced, and when the accumulated rainwater reaches a predetermined rainfall, the switching valve is switched, and the rainwater is discharged. Water is stored in the water storage tank. The predetermined rainfall is a rainfall when acid rainwater is reduced to a maximum and neutral rainwater is collected by the concentrated rain, so the rainwater storage device of the present invention drains the acid rainwater to the maximum and efficiently removes the neutral rainwater. The effect that water can be stored is obtained.

According to a third aspect of the present invention, there is provided a control apparatus for a rainwater storage device according to the present invention, comprising: a sprocket directly connected to a switching valve; a weight having a predetermined weight attached to one end of a chain around which the sprocket is wound; It has a small tank attached to the other end of the chain and having an orifice hole in the bottom surface, and a conduit for guiding rainwater to the small tank. In addition, what winds a sprocket is not limited to a chain, but may be any wire, such as a wire, and is not limited. In the rainwater storage device of the present invention, since the switching valve is controlled by the weight of the small tank storing the predetermined rainfall and the weight of the weight, no power supply is required to operate the switching valve. Therefore, the rainwater storage device of the present invention does not require a power source, and thus has an effect of being able to select an installation location. In addition, since a controller using electric energy is not required, maintenance is not required, and an effect of reducing equipment costs can be obtained.

As set forth in claim 4, the rainwater storage device of the present invention has a semi-fixed or fixed throttle mechanism on a conduit for guiding rainwater to a small tank. Since the semi-fixed or fixed throttle mechanism allows rainwater to flow into the small tank at a constant rate regardless of precipitation, it plays a role of a kind of water timer to measure the specified rainfall that maximally eliminates acid rainwater. Fulfill. Therefore, an effect is obtained that acid rainwater is maximally eliminated and neutral rainwater can be efficiently stored in the water storage tank.

Claim 5 describes that a permanent magnet is provided for holding the weight in a predetermined position and causing a snap action. When the integrated amount of the difference between the rainwater guided to the small tank and the rainwater constantly drained from the bottom becomes larger than the weight of the weight and the holding force of the permanent magnet, the switching valve is switched in a snap action. Therefore, the permanent magnet has an effect of preventing a halfway opening operation of the switching valve controlled by the weight and the small tank and ensuring the timing of switching. Further, after the switching valve is switched according to the collected rainfall, the tank capacity and the leakage amount do not repeat the switching every time the rain falls or stops.

Further, as described in claim 6,
The filtering device is provided at one end of a conduit provided with a switching valve, and is formed of a cylindrical and rotatable net for removing dust and dirt contained in rainwater. Is characterized in that it is held on the outer periphery of the mesh and can be removed by rotating the mesh. Therefore, since the filtering device is formed of a cylindrical rotatable mesh body, even if dust or dirt adheres to the wire mesh portion, the dust or dirt is generated by centrifugal force generated when the filtering device rotates. Since it is shaken off and removed to the drain pipe, the filtering device and the conduit are always in a clean state, and an effect that proper operation of the filtering device can be ensured without maintenance is exerted. Further, since the filtration device utilizes the water pressure of rainwater flowing through the conduit, there is obtained an effect that a power source is not required to operate.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the entire configuration of a rainwater storage device according to a first embodiment, which relates to a rainwater storage device of the present invention.

FIG. 2 is an enlarged view of a filtration device formed on a conduit for guiding rainwater to a water storage tank.

FIG. 3 is a sectional view of the mesh of the filtration device of FIG. 2 as viewed from above.

FIG. 4 is an enlarged view of a valve portion of a switching valve provided on a conduit for guiding rainwater to a water storage tank.

5 is a BB sectional view of the valve portion of the switching valve of FIG. 4;

FIG. 6 is a control device for controlling the switching valve,
It is a schematic structure figure in the state where the water storage tank side was closed.

FIG. 7 is a control device for controlling the switching valve,
It is a schematic structure figure in the state where the water storage tank side was opened.

FIG. 8 is a front view of a switching valve according to a second embodiment.

FIG. 9 is also a top view of FIG.

FIG. 10 is also a vertical sectional view at the center of FIG. 8;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rainwater storage device 2 filtration device 3 water storage tank 4, 42 conduit 5 switching valve 6 control device 23 mesh body 61, 161 small tank 65, 165 fixed throttle 66, 113 sprocket 67, 114 chain 68, 168 weight 69, 169 permanent magnet 101 guide pipe 102 movable body

Claims (9)

[Claims] 1. A rainwater storage device comprising: a tank for storing rainwater; a switching valve provided on a conduit for guiding the rainwater to the storage tank; and a control device for controlling the switching valve. Drain the rainwater until there is rainfall,
A rainwater storage device, characterized in that after a predetermined amount of rainfall, the switching valve is switched to guide rainwater to the water storage tank. 2. The rainwater storage device according to claim 1, wherein the control device integrates the predetermined rainfall only when there is a rainfall of a predetermined amount or more per unit time. apparatus. 3. The rainwater storage device according to claim 2, wherein the control device includes: a sprocket directly connected to the switching valve; a weight having a predetermined weight attached to one end of a chain around which the sprocket is wound; A small tank having an orifice hole formed in the bottom surface and a conduit for guiding rainwater to the small tank. 4. The rainwater storage device according to claim 3, further comprising a semi-fixed or fixed throttle mechanism on the conduit for guiding the rainwater to the small tank. 5. The rainwater storage device according to claim 4, further comprising a permanent magnet for holding the weight at a predetermined position. 6. The rainwater storage device according to claim 1, wherein the switching valve is disposed in the conduit, and the switching valve is switched according to a change in weight of the small tank. A rainwater storage device characterized by switching between water storage and drainage. 7. The rainwater storage device according to claim 1, wherein the switching valve is arranged such that a change in weight of the small tank causes an axis of the conduit to be centered with respect to the conduit. A rainwater storage device, characterized in that it rotates as water and switches between water storage and drainage. 8. The rainwater storage device according to claim 7, wherein the switching valve comprises a guide pipe and a movable body, and the guide pipe and the movable body sandwich a strainer. Water storage device. 9. The rain water storage device according to claim 1, wherein the switch valve is provided at one end of a conduit provided with the switching valve, and has a cylindrical shape for removing dust and dirt contained in rain water. A rainwater storage device comprising a rotatable and rotatable net, and a filtering device for holding dust and dirt on an outer periphery of the net and removing the dust by rotation of the net.