JP2002242899A - Water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water supply device for use in a middle water facility of such a structure that air lift devices are used as a water delivery device from a water collecting trough to a purification trough, including a selector valve to change over the destination of air supply from an air pump, wherein the lifetime of the selector valve can be elongated while the influence of the water level variation in the water collecting trough upon the water delivering ability is suppressed as much as practicable. SOLUTION: The water delivery device is to deliver the water stored in the water collecting trough 16 to downstream using air lift devices 40 and 42, wherein the water collecting trough 16 is partitioned into a water collecting chamber 32 having a relatively large capacity and a water delivering chamber 34 having a relatively small capacity, and the chambers 32 and 34 are equipped with the first and second air lift devices 40 and 42, respectively. The water delivering chamber 34 has a capacity to accommodate a water amount equivalent to two runs of water delivery operation by the second air lift device 42, and the water in the chamber 34 is delivered to the purification trough 18, being divided in two runs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device using an air lift device, and more particularly to a water supply device suitable as a water supply device in a middle water supply facility.

[0002]

BACKGROUND OF THE INVENTION Problems relating to securing water resources, such as enormous costs for dam construction and environmental destruction due to the effects thereof, have become more serious worldwide in recent years. In Japan, the tendency of low rainfall is increasing, and chronic water shortage is occurring. Under these circumstances, there is a need for a system that enables each person to easily and effectively use water resources in their daily lives and to reduce the burden on households due to rising water and sewage rates. .

[0003] Under such a background, reusable water such as rain water and low-polluting wastewater such as bathtub drainage is collected and stored in a tank portion, and the stored water (medium water) is used as toilet flush water. Alternatively, an intermediate water facility for supplying water to various destinations as water for car washing, and further as water for watering a garden or the like is envisioned.

[0004] However, water such as bathtub drainage contains dirt, and therefore cannot be supplied as it is to various destinations. The water is once purified and stored in an intermediate water facility, and then stored. It is necessary to supply water to various destinations.

[0005] Therefore, in such an intermediate water system, the inflow bath tub drainage and the like are temporarily stored in a water collecting tank, which is sent to a downstream purification tank to purify the water, and then the purified water is used for various purposes. It will be supplied first.

[0006] As a means for sending water from the water collecting tank to the purification tank on the downstream side, it is preferable to use an air lift device utilizing the conveying force of air. In this case, if the water in the water collection tank is directly sent to the downstream purification tank by the air lift device, the water level inside the water collection tank changes greatly depending on the presence or absence of inflow of bathtub drainage, etc. The water supply capacity becomes unstable and the amount of water supply becomes unstable.

[0007] In the case of water supply by an air lift device, when the water level in the water collecting tank is low, the required pumping height, that is, the water lifting height increases, so that even if the same amount of air is supplied, the water supply amount is reduced. On the other hand, when the water level in the water collecting tank is high, the required pumping height, that is, the water lifting height is low, so that a large amount of water is sent even under the same air supply. As a result, the amount of water supply changes according to the fluctuation of the water level in the water collecting tank. However, if the amount of water supplied to the septic tank fluctuates, the purification process in the septic tank will not be constant, and the quality of the tap water supplied from the tap water facility will be unstable.

As means for solving this problem, the water collecting tank is divided into a first chamber having a relatively large capacity and a second chamber having a relatively small capacity, and a first air lift device and a second air lift device are provided respectively. Then, the water in the first room is supplied to the second room by the first air lift device, and the water in the second room is supplied to the septic tank by the second air lift device while the second room is always full. It is conceivable that With this configuration, it is possible to perform water supply to the septic tank by the second air lift device in a state where the second chamber is always full, so that water can always be supplied to the septic tank with a constant water supply amount.

In the above case, a common air pump is provided for the first air lift device and the second air lift device, and air from the air pump is supplied to the first air lift device by the switching valve.
Switching between the air lift device side and the second air lift device side is convenient because only one air pump is required.

However, in this case, the capacity of the second chamber is set to the capacity for storing the water of the one-time water supply amount by the second air lift device, and the water in the second room is entirely pumped by the second air lift device in one water supply. In this case, the supply destination of the air from the air pump must be switched between the first air lift device side and the second air lift device side each time. As a result, the switching frequency of the switching valve increases, Inconveniences such as a shortened service life occur. Although the above description has been given of the intermediate water facility as an example, such a problem is a problem that occurs commonly in other water supply devices using an air lift device other than the intermediate water facility.

[0011]

The water supply device of the present invention has been devised to solve such a problem. According to a first aspect of the present invention, there is provided a water supply device for supplying water stored in a water tank to a downstream side by an air lift device, wherein the first chamber having a relatively large capacity and the first chamber having a relatively small capacity are provided in the water tank. A first air lift device for supplying water to the first chamber, a second air lift device for supplying water to the second chamber, and the first air lift device for supplying water in the first chamber. Water is intermittently supplied to the second chamber by the device, and water in the second chamber is intermittently supplied to the downstream side by the second air lift device, and the capacity of the second chamber is reduced by the second air lift device. The air lift device has a capacity to accommodate two or more times of the amount of water supplied by the air lift device, and the water in the second chamber is supplied twice or more by the second air lift device. It is characterized by the following.

According to a second aspect of the present invention, in the first aspect, the second chamber is filled with a single supply of water by the first air lift device in the first chamber. I do.

According to a third aspect of the present invention, in any one of the first and second aspects, a common air pump is used for the first air lift device and the second air lift device, and an air supply destination from the air pump is switched by a switching valve. It is characterized in that switching to the first air lift device side or the second air lift device side is performed.

According to a fourth aspect of the present invention, the water tank according to any one of the first to third aspects, wherein the water tank recovers and purifies wastewater having a low degree of pollutant such as bathtub drainage or reusable water such as rainwater in a tank portion. And a water collection tank in a middle water facility for storing the purified water and supplying the same as various types of water to various destinations. The middle water facility has a purification tank for performing biological purification downstream of the water collection tank. The first air lift device and the second air lift device supply water in the water collecting tank to the purification tank.

According to a fifth aspect, in the fourth aspect, the second air lift device performs the second water supply after a predetermined stop time after the first water supply. And

[0016]

As described above, according to the present invention, the first chamber and the second chamber are provided in the water tank, and the corresponding first and second air lift devices are provided. After pumping the water in one room to the second room,
The water in the second chamber is intermittently supplied to the downstream side by the second air lift device, and the capacity of the second chamber is set to be equal to or more than two times the water supply by the second air lift device. In such a case, even when the water level in the first room is lowered, there is no problem that the air must be supplied to the downstream side by the air lift device in the state of the low water level at all times. Can be sent downstream at a high water level by the second air lift device.

In the present invention, when the capacity of the second chamber is increased and the water is supplied to the downstream side by the second air lift device in a large number of times, the number of times of water supply in a state where the water level in the second chamber is low increases. Therefore, the capacity of the second room was set to about the capacity of water supply for two times,
It is desirable that the water be supplied separately. With this configuration, the water in the second chamber can be sent to the downstream side at least once every two hours under a full state.

In the present invention, a common air pump is used for the first air lift device and the second air lift device, and the air supply destination from the air pump is switched to the first air lift device side or the second air lift device side by a switching valve. This is desirable (claim 3), and the number of air pumps required can be reduced by using a common air pump for the first air lift device and the second air lift device. In this example, the switching frequency of the switching valve can be reduced, and the life of the switching valve can be extended.

Further, the present invention is particularly suitable for application to water supply from a water collecting tank to a downstream septic tank in a middle water facility (claim 4). When the present invention is applied to the water supply from the water collecting tank to the septic tank in such an intermediate water facility, the amount of water sent to the septic tank can be stabilized, and the purification process in the septic tank can be stably performed.

In this case, after the second air lift device performs the first water supply, the second water supply can be performed after a predetermined stop time (claim 5). In other words, by performing the next water supply after a certain time, the purification treatment in the purification tank can be performed more stably.

[0021]

Next, an embodiment in which the present invention is applied to water supply from a water collecting tank to a septic tank in an intermediate water facility will be described in detail below. FIG. 1 shows a schematic overall configuration of the wastewater system of the present embodiment. In FIG. 1, reference numeral 10 denotes a tank portion buried in the soil.
Reference numeral 2 denotes an equipment section on the ground. Reference numeral 14 denotes a pump which forms a part of the equipment section 12, and water (medium water) after purification and sterilization stored in a water storage tank 24, which will be described later, is supplied to the pump 14.
And is supplied to various destinations through the delivery pipe 15.

FIG. 2A shows a plan view of the tank section 10. As shown, a water collecting tank 16 as a water tank, a purification tank 18, and a sedimentation separation tank 20 are provided inside the tank section 10.
, An electrolytic sterilization tank 22 and a water storage tank 24 are defined. In the case of the sewage system in this example, the bathtub drainage
6 flows into the water collecting tank 16. At this time, the bathtub drainage
It flows through the screen 30 of FIG. 1 where the solids in the bathtub drainage are filtered off. In addition, the surplus portion of the bathtub drainage that has flowed in flows out of the outflow portion 28 and is discharged.

In FIG. 1, the water collecting tank 16, the purification tank 18,
The sedimentation separation tank 20, the electrolytic sterilization tank 22, and the water storage tank 24 are shown according to the flow of water. As shown in this figure, in this intermediate water system, the bath water drained from the inflow section 26 is first collected in the water collecting tank 16 first, and then the purification tank 18 → the sedimentation separation tank 20 → the electrolytic sterilization tank 22 → the water storage It is sent in the order of the tank 24. Here, the water collecting tank 16 collects a low-polluting wastewater such as a bathtub drainage and stores a certain amount of the wastewater. Excess portion of the bathtub drainage flowing from the inflow portion 26 is discharged from the outflow portion 28 to the outside. Released to

The septic tank 18 decomposes and purifies human soil and dirt such as bathtub detergent contained in the bathtub drainage by biological treatment, and allows the white spherical fluidized carrier to flow by aeration. Microorganisms adhering to the surface of the fluid carrier decompose and purify organic dirt.

The water purified in the purification tank 18 is sent to the subsequent sedimentation separation tank 20 by overflow. The sedimentation / separation tank 20 is used to naturally settle and separate and remove the suspension of water sent from the purification tank 18, and the supernatant of the sedimentation / separation tank 20 overflows to the subsequent electrolytic sterilization tank 22. Water is sent.

The electrolytic disinfection tank 22 converts chlorine ions originally contained in the bath effluent into hypochlorous acid having a sterilizing property by electrolysis, thereby performing sterilization by the sterilizing water. Then, water is sent to the subsequent water storage tank 24 by overflow and stored there. Water and rainwater are supplied to the water tank 24 through a water supply pipe 74 and a rainwater supply pipe 86, which will be described later.

As shown in FIG. 3, the water collecting tank 16 is divided into a relatively large-capacity water collecting chamber (first chamber) 32 and a relatively small-capacity water feeding chamber (second chamber) 34. The water collecting chamber 32 is provided with a float 36 and a float switch 38 as a water level sensor. These floats 3
The float switch 6 and the float switch 38 are for detecting that the water level in the water collecting chamber 32 has decreased and has reached the limit water level. When the water level in the water collecting chamber 32 reaches the limit water level, the water collecting tank 16 is used. From the to the septic tank 18 is stopped.

Each of the water collection chamber 32 and the water supply chamber 34 is provided with a first air lift device 40 and a second air lift device 42 which constitute a water supply device. The air lift devices 40 and 42 transfer the air sent through the air tube 44 as shown in FIG.
The water in the water collection chamber 32 and the water supply chamber 34 is discharged by the air lift pipe 4 by the rising action of the air in the air lift pipe 46.
6, and the water is supplied to the water supply chamber 34 and the septic tank 18, respectively. Note that the air lift devices 54 and 58 described later have the same configuration.

The respective air pipes 44-1 and 44-2 in the air lift devices 40 and 42 are connected to a first air pump 50 via a three-way valve 48 as a switching valve as shown in FIG. And its first air pump 5
Air from 0 is supplied to the air lift devices 40 and 42 through the air pipes 44-1 and 44-2, respectively. Here, the first air pump 50 is connected to the air lift device 4.
0 and 42 are common.

As described above, in the present embodiment, the water in the water collecting chamber 32 is first supplied to the water supply chamber 34 by the first air lift device 40, and the water in the small capacity water supply chamber 34 is supplied to the next stage. The water is sent to the septic tank 18 by the 2 air lift device 42.

The water in the water collecting chamber 32 is sent by the first air lift device 40 in one time until the inside of the water sending chamber 34 becomes full. On the other hand, the water in the water supply chamber 34 is supplied to the septic tank 18 by the second air lift device 42 twice.

As described above, the water collecting tank 16 is provided with the large capacity water collecting chamber 3.
2 and a small-capacity water supply chamber 34, each of which is provided with an air lift device 40, 42 so as to supply water, so that the water supply amount is substantially constant regardless of the fluctuation of the water level in the water collection chamber 32. The water in the water collecting tank 16 is transferred from the water supply chamber 34 to the next septic tank 1.
8 can be sent.

On the other hand, as shown in FIG.
An air pipe 44-5 is inserted into the inside of the tank, and air is aerated into the water of the septic tank 18 from an aeration section 52 provided at the distal end thereof.

The settling tank 20 is provided with an air lift device 54. The air lift device 54 is for discharging the entire amount of water including the sludge in the sedimentation / separation tank 20 at predetermined intervals. The water including the sludge in the sedimentation / separation tank 20 lifted by the air lift device 54 is Piping 56
Through the outlet 28 to the outside. That is, when the air lift device 54 operates, the sedimentation separation tank 20
The inside is almost empty.

The electrolytic sterilization tank 22 is provided with a pair of electrode plates 57 for performing electrolysis. An air pipe 44-7 enters the inside of the electrolytic sterilization tank 22, and aeration is performed from an aeration section 52 at the distal end thereof. The electrolytic sterilizing tank 22 has an air lift device 58.
Is provided.

The aeration section 52 in the electrolytic sterilization tank 22
Is for removing dirt attached to the surface of the electrode plate 57 by the agitation force of the aeration, and furthermore, the air lift device 58 of the electrolytic sterilizing tank 22 is provided with an electrode in the electrolytic sterilizing tank 22 after the aeration. The dirt-containing water removed from the plate 57 is discharged entirely from the outlet 28 through the pipe 56 to the outside.

The aeration from the aeration section 52 and the discharge of water by the air lift device 58 are performed at predetermined intervals. At that time, first, after the aeration from the aeration unit 52 is performed, the water is discharged by the air lift device 58. In this electrolytic sterilization tank 22, a single air lift device 58 is also used.
When the water is discharged, the entire amount of water in the electrolytic sterilization tank 22 is discharged at a time. Therefore, by the operation of the air lift device 58, the inside of the electrolytic sterilizing tank 22 is temporarily almost empty.

In FIG. 1 and FIG. 4, reference numeral 64 denotes a second air pump, which is connected to two air pipes 44 through a three-way valve 62.
-3, 44-4 branch out and extend. Further, at the tip of each of the branched air pipes 44-3 and 44-4, two air pipes 44-5 and
44-6 and 44-7, 44-8 branch and extend.

One air pipe 44-5 extending from the three-way valve 60 enters the inside of the purification tank 18, and the aeration section 52 for aerating the inside of the purification tank 18 is provided at the tip thereof. ing. Further, the other air pipe 44-6 extending from the three-way valve 60 enters the inside of the sedimentation / separation tank 20, and constitutes the air lift device 54 in the sedimentation / separation tank 20.

Further, from the air pipe 44-4 extending from the three-way valve 62, the two air pipes 44
-7 and 44-8 branch out and extend, and each of them enters the inside of the electrolytic sterilization tank 22. The aeration section 52 for performing aeration is provided at the end of one air pipe 44-7, and the other air pipe 44-8 constitutes an air lift device 58 in the electrolytic sterilization tank 22. .

In the present embodiment, the first
The air lift function of the air lift device 40, i.e., water supply from the water collection chamber 32 to the water supply chamber 34, and the second air lift device 4
2, that is, from the water supply chamber 34 to the septic tank 1
The water supply to 8 is not performed at the same time, only one of them is performed. Specifically, first, water is supplied by the first air lift device 40, and thereafter, the second air lift device 4
2 is performed.

When water is supplied by the first air lift device 40, the air supply destination from the first air pump 50 is switched by the three-way valve 48 to the air pipe 44-1 side of the first air lift device 40, Furthermore, when water is supplied by the second air lift device 42, the supply destination of the air from the first air pump 50 is switched to the air pipe 44-2 side of the second air lift device 42 by the three-way valve 48.

The aeration in the purification tank 18 and the air lifting action by the air lift device 54 in the precipitation / separation tank 20, that is, the discharge of the water in the precipitation / separation tank 20, are not performed at the same time, but only one of them is performed. At that time, the three-way valve 60
Is switched to the side of the air pipe 44-5 or 44-6, specifically to the side of the purification tank 18 or the side of the sedimentation separation tank 20.

Furthermore, the aeration in the electrolytic sterilizing tank 22 and the air lifting action by the air lift device 58, that is, the discharge of the water in the electrolytic sterilizing tank 22, are not performed at the same time, but only one of them is performed. At this time, the three-way valve 61 is
It is switched to the side of -7 or 44-8.

The air pipe 44-3 connected to the purification tank 18 and the sedimentation separation tank 20 via a three-way valve 60, and the air pipe 44-4 connected to the electrolytic sterilization tank 22 via a three-way valve 61, The air from the second air pump 64 is alternatively supplied. That is, based on the switching operation of the three-way valve 62, air is supplied to any of them.

An electromagnetic on-off valve is provided for each of the air pipes 44-1 to 44-8, and the supply of air to each of the air pipes 44-1 to 44-8 is controlled based on the opening and closing of the electromagnetic on-off valve. This can be done, but in this case, a number of solenoid on-off valves corresponding to the number of air pipes is required, which increases the cost required for the valves.

On the other hand, in this example, four three-way valves 48,
Since the switches are switched by using the switches 60, 61, and 62, the number of necessary valves can be reduced, and the cost required for the valves can be reduced. Furthermore, by switching the three-way valves 48, 60, 61 and 62,
Since air is supplied to each of the air pipes 44-1 to 44-8, the number of necessary air pumps can be reduced.

FIG. 7 shows a specific configuration of the three-way valve used in this embodiment. As shown, the three-way valve 48 (60, 6
1, 62) are an inflow port 66 and an outflow port 68-
, 68-2, a valve body 70, and a driving unit 72 such as a motor for rotating the valve body 70.
By the zero rotation drive, the air flowing in from the inflow port 66 is selectively flown out from one of the outflow ports 68-1 and 68-2.

As shown in FIGS. 1 and 5, the water storage tank 24 is supplied with clean water through a clean water supply pipe 74. As shown in FIG. 1, a filter 76, an electromagnetic on-off valve 78, and a constant flow valve 80 are provided on the water supply pipe 74, and an edge cut portion 82 is further provided downstream thereof.

The rim 82 is provided to prevent water in the water storage tank 24 from flowing backward in the water supply pipe 74 as shown in FIG. After the tap water sent through the supply pipe 74 falls to the hopper 84, it flows into the water storage tank 24 through the tap water supply pipe 74 on the downstream side.

The reservoir 24 is also supplied with rainwater through a rainwater supply pipe 86 as shown in FIG. Specifically, rainwater from a roof or the like is sent through a rainwater supply pipe 86, and is supplied to the water storage tank 24 through a rainwater measure 88 and a ball tap 90 as an automatic water supply device.

FIG. 8 shows a specific structure of the rainwater measure 88. As shown in the figure, the rainwater flowing through the rainwater supply pipe 86 is supplied to the water storage tank 24 through the rainwater measure 88, and in the rainwater measure 88, surplus rainwater flows through the overflow pipe 92. Drained outside. By providing such a rainwater measure 88,
Excessive rainwater is prevented from flowing into the water storage tank 24 during rainfall. The prevention of the inflow of excessive rainwater is also achieved by the ball tap 90 as an automatic water supply device.

FIG. 9 shows a schematic configuration and operation of the ball tap 90. As shown in the figure, the ball tap 90 has a float 93 that moves up and down in conjunction with the water level of the water storage tank 24 and a valve portion 94 that opens and closes in conjunction with the elevation of the float 93. Then, when the water level in the water storage tank 24 drops and the float 93 descends, the valve body 96 of the valve portion 94 opens here, and the rainwater sent through the rainwater supply pipe 86 is discharged through the water discharge pipe 98 to the water storage tank. 24
Supplied within. On the other hand, when the water level in the water storage tank 24 rises to the set water level, the upward movement of the float 93 closes the valve element 96, and the supply of rainwater from the water discharge pipe 98 into the water storage tank 24 stops.

The water tank 24 is also provided with a water level sensor 99. This water level sensor 99 has four electrode rods E1, E2, E3, E having different lengths as shown in FIG.
4 to detect the water level in the water storage tank 24 in a plurality of stages based on whether or not the electrode rods E1 to E4 are immersed in water. Based on the water level detection by the water level sensor 99, various controls by the control board 100 described later are performed.

Specifically, as shown in FIGS. 12A and 12I, when the electrode rod E1 is immersed in water, that is, when the water level in the water storage tank 24 is higher than the lower end of the electrode rod E1. , The water supply of the bathtub drainage from the water collecting tank 16 to the downstream side is prohibited. From this state, water in the water storage tank 24 is pumped out by the pump 14 and supplied to various destinations.
As a result, the water level in the water storage tank 24 decreases, and the water level decreases as shown in FIGS.
When it becomes lower than the lower end of 3, the pump 14 is prohibited from pumping water in the water storage tank 24 here. At the same time, water is supplied into the water storage tank 24 through the water supply pipe 74.

FIG. 12B shows a state change due to the supply of water into the water storage tank 24. First, FIG.
As shown in (I), when the water level in the water storage tank 24 becomes lower than the lower end of the electrode rod E3, the water supply is performed while the pumping of the water in the water storage tank 24 is prohibited as described above. Is performed, and accordingly, the water level in the water storage tank 24 rises. At this time, even if the water level in the water storage tank 24 becomes higher than the lower end of the electrode rod E3 as shown in (II),
At the point in time when the lower end of the water tank 2 has not been reached, the pump 14 is still prohibited from pumping water in the water storage tank 24. And (II
As shown in I), the water level in the water storage tank 24 is changed to the electrode rod E.
Only after the lower end of the pump 2 has the pump 14 become operable again. However, when replenishing clean water, the water level is
When it reaches the lower end of 2, it stops.

Usually, water is supplied from the water collecting tank 16 to the downstream side together with the supply of clean water. Therefore, when clean water is supplied, water is simultaneously supplied from the electrolytic sterilizing tank 22 to the water storage tank 24. Thereby, the water level in the water storage tank 24 rises higher than the lower end of the electrode rod E2. However, the rise of the water level due to the replenishment of the tap water and the water supply from the electrolytic sterilization tank 22 to the water storage tank 24 is limited to the lower end of the electrode rod E1.

That is, a capacity for supplying rainwater is always secured inside the water storage tank 24, as shown in FIG.
By supplying rainwater from the state of (IV),
As shown in (V), the water level in the water storage tank 24 rises to a full state. When the water level in the water tank 24 becomes full, the float 93 of the ball tap 90 rises, and the supply of rainwater from the ball tap 90 stops there.

As described above, the water collecting tank 16 is provided with a float 36 and a float switch 38. When the water level in the water collecting tank 16 detected by the float 36 and the limit switch is at the limit water level, the downstream side from the water collecting tank 16 is provided. There is no water supply.

As shown in FIG. 1, a control board 100 and a terminal block 102 are provided in the equipment section 12 on the ground, and the control board 100 controls various operations in the underground water facility. This control board 100 includes FIG.
As shown in FIG. 1, a display unit 106 for displaying an operation state, a failure, and the like of the water supply facility is provided. Here, the display by the display unit 106 is performed by blinking or lighting of the LED.

For example, when the display unit 106 blinks once, it indicates an abnormality of the electrolytic sterilizing tank 22, and when it blinks twice, it indicates an abnormality of the electrode plate 57 in the electrolytic sterilizing tank 22.
When blinking three times, the three-way valve 48, 60, 61, 6
2 indicates that there is an abnormality, and when it flashes four times, it indicates that there is an abnormality in the water supply supply electromagnetic on-off valve 78 or the water level sensor 99 in the water storage tank 24. However, this is only an example.

Here, the display unit 106 is provided on the control board 100.
However, it is also possible to extend the remote controller to the outside and provide such a display unit 106 at the remote controller. In FIG. 1, reference numeral 104 denotes a water tank 24.
It is a sand strainer that performs sand straining when pumping water from the sea.

Next, the operation of the sewage system of this embodiment will be specifically described below. First, FIGS. 13 to 19 show the operation of the first air lift device 40 and the second air lift device 4 in the water collecting tank 16.
2 is shown. As shown in FIG. 19, here, the operation of the first stage first air lift device 40 is represented by A1, and the operation of the next stage second air lift device 42 is represented by A2. Further, the operation of the air lift device 54 in the sedimentation separation tank 20 is represented by B, and the operation of the air lift device 58 in the electrolytic sterilization tank 22 is represented by C.

First, as shown in FIG. 13, in this intermediate water system, the first air lift device 40 operates in the water collecting tank 16 (A1 operation), and the water in the water collecting chamber 32 is transferred to the water supply chamber 34. And water. The situation at this time is shown in FIGS.
(I), (II) and FIGS. 17 and 18 (I).

As shown in FIG. 17, this water collecting chamber 3
By the operation of the first air lift device 40 in 2, that is, the A1 operation, the water level in the water supply chamber 34 continuously rises to the full state. At this time, as shown in FIGS. 13 and 18 (I), the aeration by the aeration unit 52 in the septic tank 18 is performed in parallel.

Next, FIGS. 14, 15 (III), (IV), and FIG.
18 (II), the second air lift device 42 in the water supply chamber 34 operates (first time A2
Operation), the water in the water supply chamber 34 is supplied to the septic tank 18. At this time, about half of the effective water amount in the water supply chamber 34 is first sent to the septic tank 18.

Thereafter, FIG. 17 and FIG. 16 (V), FIG.
As shown in (III), the A2 operation is temporarily stopped, and after a predetermined stop time, the operation is restarted as shown in FIGS. 16 (VI), (VII), and FIG.
As shown in FIG. 8 (IV), the second A2 operation is performed, and the second air lift device 42 supplies the remaining water in the water supply chamber 34 to the purification tank 18. Here, the water level in the water supply chamber 34 substantially falls to the lowest water level.
As shown in FIGS. 14 and 18 (II) and (IV), while the A2 operation is being performed, the aeration by the aeration unit 52 in the purification tank 18 is performed in parallel.

As shown in FIG. 19, in the sewage system of this example, the operations of A1, A2, stop, and A2 are defined as one cycle, and the operations of one cycle are performed one after another. And during the 20 cycles of that operation (the time during this period is 38 hours)
The operation (operation B) of the air lift device 54 in the sedimentation separation tank 20 described below and the operation (operation C) of the air lift device 58 in the electrolytic sterilization tank 22 are each performed once.

FIGS. 20 and 21 specifically show the state of the B operation. This B operation, that is, the sedimentation separation tank 20
By the operation of the air lift device 54, the sludge collected near the bottom of the sedimentation separation tank 20 is drawn out together with the water, and discharged from the outlet 28 through the pipe 56 to the outside. At this time, the A1 operation and the A2 operation are stopped as shown in FIG.

FIGS. 22 to 25 show the above-mentioned C operation, that is, the operation of the air lift device 58 in the electrolytic sterilizing tank 22 and the operation of aeration by the aeration unit 52 in the electrolytic sterilizing tank 22 prior thereto. First, as shown in FIG. 22, FIG. 24 (I) and FIG. 25, in the electrolytic sterilization tank 22, air is blown out from the aeration unit 52, that is, aeration is performed, and the air adheres to the surface of the electrode plate 57. Dirt is removed by the agitation power of the aeration. At this time, as shown in FIG. 25, the electrolytic action by the electrode plate 57, that is, the electrode plate 57
The energization to is stopped.

Following this aeration, FIG. 23 and FIG.
As shown in (II), the air lift operation by the air lift device 58 in the electrolytic sterilization tank 22, that is, the above-mentioned C operation is performed. By this C operation, the water in the electrolytic sterilization tank 22 containing the dirt removed from the surface of the electrode plate 57 is pumped up, and discharged from the outlet 28 through the pipe 56 to the outside.

By the electrolytic action in the electrolytic sterilizing tank 22, a disinfectant such as hypochlorous acid is generated there, thereby sterilizing water in the electrolytic sterilizing tank 22. Thereafter, the water in the electrolytic sterilization tank 22 is sent to the water storage tank 24 by overflow, and the water supply naturally contains a sterilizing agent such as hypochlorous acid generated in the electrolytic sterilization tank 22. Therefore, the water in the water tank 24 also contains the disinfectant thus produced, and when rainwater whose excessive inflow is prevented by the action of the ball tap 90 is supplied to the water, the water inside the water tank 24 is also there. Sterilization of the inflowing rainwater will be performed.

As described above, in the present embodiment, the water collecting tank 16 is divided into the water collecting chamber 32 and the water supplying chamber 34, and the water in the water collecting chamber 32 is pumped by the first air lift device 40 into the water supplying chamber 34. The water in the water supply chamber 34 is supplied to the second air lift device 42.
Since the water is intermittently supplied to the septic tank 18 side at the time, even when the water level in the water collecting chamber 32 decreases,
There is no problem that water must always be supplied to the septic tank 18 at the low water level, and the water transferred into the water supply chamber 34 is supplied to the septic tank 18 under the high water level by the second air lift device 42. Can be watered.

In this embodiment, the air lift device 40,
A common first air pump 50 is used for the air pump 42, and the supply destination of the air from the first air pump 50 is switched to the first air lift device 40 side or the second air lift device 42 side by the three-way valve 48. Therefore, the number of required air pumps can be reduced and the frequency of switching the three-way valve 48 can be reduced, so that the life of the three-way valve 48 can be extended.

Further, according to this embodiment, the amount of water supplied from the water collecting tank 16 to the purification tank 18 on the downstream side can be stabilized, and the purification treatment in the purification tank 18 can be performed stably.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in variously modified forms without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a schematic overall configuration of a drainage system according to one embodiment of the present invention.

FIG. 2 is a diagram showing a tank unit and a device unit of the wastewater facility of the embodiment.

FIG. 3 is an enlarged view showing a water collecting tank of the embodiment.

FIG. 4 is an enlarged view showing a purification tank, a sedimentation separation tank, and an electrolytic sterilization tank of the same embodiment.

FIG. 5 is an enlarged view showing a water storage tank of the embodiment.

FIG. 6 is an explanatory diagram of an air lift device in the embodiment.

FIG. 7 is a view showing a three-way valve in the embodiment.

FIG. 8 is a diagram showing a rainwater basin and a peripheral portion of the embodiment.

FIG. 9 is an explanatory diagram of a ball tap in the embodiment.

FIG. 10 is a diagram showing a marginal portion of a water supply pipe in the embodiment.

FIG. 11 is a diagram showing a control board and a display unit provided thereon in the embodiment.

FIG. 12 is a diagram showing a water level sensor provided in the water storage tank of the embodiment and a state of control based on a water level detected by the water level sensor.

FIG. 13 is an explanatory view of the operation of the air lift device in the water collecting tank of the embodiment.

FIG. 14 is an operation explanatory diagram following FIG. 13;

FIG. 15 is an operation explanatory diagram showing the operation of FIGS. 13 and 14 in detail.

FIG. 16 is a detailed operation explanatory view following FIG. 15;

FIG. 17 is a diagram showing the operation of FIGS. 13 and 14 in a time chart.

FIG. 18 is a diagram showing a flow of water during the operation shown in FIGS. 13 and 14;

FIG. 19 is a diagram showing a cycle of operation in a water collecting tank, a sedimentation separation tank, and an electrolytic sterilization tank.

FIG. 20 is an explanatory view of the operation of the air lift device in the sedimentation separation tank.

21 is a diagram showing a flow of water during the operation shown in FIG. 20.

FIG. 22 is an operation explanatory view showing an aeration operation in the electrolytic sterilization tank.

FIG. 23 is an explanatory view of the operation of the air lift device in the electrolytic sterilization tank.

FIG. 24 is a diagram showing a flow of water during the operation shown in FIGS. 22 and 23.

FIG. 25 is a diagram showing, in a time chart, an energized state of an electrode plate, an aeration operation, and a sludge extraction operation in an electrolytic sterilizing tank.

[Explanation of symbols]

 Reference Signs List 10 tank section 16 water collecting tank (water tank) 18 septic tank 32 water collecting chamber (first chamber) 34 water supply chamber (second chamber) 40 first air lift device 42 second air lift device 48 three-way valve (switching valve) 50 first air pump

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 9/00 502 C02F 9/00 502P 502M 503 503F 504 504A 504E

Claims (5)

[Claims] 1. A water feeding device for feeding water stored in a water tank to a downstream side by an air lift device, wherein the water tank is provided with a first chamber having a relatively large capacity and a second chamber having a relatively small capacity. A first air lift device for water supply in the first chamber and a second air lift device for water supply in the second chamber, and the water in the first room is intermittently supplied by the first air lift device. Water is supplied to the second chamber, and the water in the second chamber is intermittently supplied to the downstream side by the second air lift device, and the capacity of the second chamber is reduced to the second
The air lift device has a capacity to accommodate two or more times of the amount of water supplied by the air lift device, and the water in the second chamber is supplied twice or more by the second air lift device. A water supply device, characterized in that: 2. The water supply device according to claim 1, wherein the water in the first room is filled by the first air lift device once. 3. The first air lift device according to claim 1, wherein a common air pump is used for the first air lift device and the second air lift device, and an air supply destination from the air pump is switched by a switching valve. Characterized in that it is switched to the side or the second air lift device side. 4. The water tank according to claim 1, wherein the water tank collects and purifies the low-polluting drainage such as bathtub drainage and reusable water such as rainwater in the tank unit. It is a water collecting tank in a medium water facility that stores the later water and supplies it to various destinations as medium water, and the medium water facility is provided with a purification tank that performs biological purification downstream of the water collecting tank, A water supply device, wherein the first air lift device and the second air lift device supply water in the water collecting tank to the septic tank. 5. The second air lift device according to claim 4, wherein the second air lift device waits for a predetermined stop time after the first water supply to stop the second water lift.
A water supply device, wherein the water supply is performed a second time.