JP2715058B2 - Rainfall system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainfall system used for rainfall experiments and the like.

[0002]

2. Description of the Related Art It is extremely important to carry out various rainfall experiments and take measures for disaster prevention in the future based on the results. However, conventional rainfall experiment facilities have been configured as follows. That is, as shown in FIG. 9, a water tank 101 and four main pipes 10 piped to, for example, a ceiling of an experimental building.
2, 103, 104, 105 and the main pipes 102, 1
03, 104, and 105, respectively, and branch pipes 102a to 102a to be piped for each of the rainfall units A, B, C,.
2c ..., 103a to 103c ..., 104a to 104c
, 105a to 105c, and four types of nozzles α, β, γ, and δ having different diameters corresponding to the main pipe system are prepared for each of the rainfall units A, B, and C. Each of these nozzles is connected to the branch pipes 102a to 102c.
..., 103a to 103c ..., 104a to 104c ..., 1
05a to 105c...

That is, each of the rainfall units A, B, C... Is provided with a spray nozzle type nozzle α, β, γ having a different diameter at the tip of each branch pipe grouped by a predetermined number (four in the illustrated example). , Δ are simply mounted. The main pipes 102, 103, 104, and 105 have automatic valves 1 at the stage before they are branched by the branch pipes.
06, 107, 108 and 109 are interposed. Reference numeral 110 is a relief valve.

At the time of a rainfall experiment, a nozzle having a diameter corresponding to the amount of rainfall is selected, and the corresponding main pipes 102, 10
3, 104 and 105 are selected, only the automatic valve of the selected main pipe is opened, and water taken by the pump 111 is sent to the selected main pipe, and rain is caused from the same system nozzle in each rainfall unit. Was like that. For example, if the diameters of the nozzles α, β, γ, δ are α>β>γ> δ, in order to realize the rainfall with the largest rainfall, the nozzles α in each of the rainfall units A, B, C. It is necessary to cause rain, but in this case, the main pipe 1 for sending water to the branch pipes 102a to 102c.
Only the automatic valve 106 of 02 is opened to cause rainfall.

[0005]

However, in such a conventional technique, since the piping distance from the automatic valve to the nozzle is long, it takes time to switch the amount of rainfall.
Further, since the pressure during rainfall is constant, the particle size of raindrops is limited to one type, and various rainfall experiments cannot be performed. Moreover, even if the switching control of the automatic valve is performed in an experiment of "street rain", it takes time for the switching and the like, so that "street rain" cannot be realized.

The present invention has been made in view of the above circumstances, and provides a rainfall system that can instantaneously switch the amount of rainfall, can select the particle size of raindrops to some extent, and can also realize "street rain". The first object is to solve the above problem. A second object of the present invention is to program the contents of a rainfall experiment using an arithmetic processing unit such as a personal computer, and perform various rainfall operations by operating the arithmetic processing unit such as a personal computer based on the program. An object of the present invention is to provide a rainfall system that enables experiments to be realized.

[0007]

According to the first aspect of the present invention, there are provided a plurality of rainfall devices disposed at a rainfall position (a predetermined height), and a pipe for supplying water to each of the rainfall devices. Each rainfall device has a plurality of nozzle units.
Has, a rainfall system for water ejected from the nozzles of the nozzle unit to create rainfall state from the piping system, in each of rainfall device, different mouth
At least two nozzle units equipped with nozzles with a diameter
Provided above, and in each rainfall device, the piping
The flow paths from the system to the nozzle units communicate with each other.
A valve that can open and close the water supply passage to each nozzle instantly
Provided near the nozzle for each nozzle unit,
A control device for controlling the opening and closing of this valve is provided, and in accordance with a preset program, each rainfall in a designated area is
A rainfall system is provided, wherein each valve of a selected nozzle unit in the device is configured to open and close by an instruction of the control device, for example, sequence control.

[0008]

In the rainfall system , "opening and closing instantaneously" means opening and closing in a time as short as possible, and it is preferable that the opening and closing operation is performed within 2 seconds.

In the rainfall system according to a second aspect, in the rainfall system according to the first aspect , the selected nozzle unit is switched to another nozzle unit in the rainfall device during a program (for example, during rainfall). It is characterized by being constituted as follows.

The rainfall system according to claim 3 is
The rainfall system according to claim 1 or 2 , wherein each valve of the nozzle unit that opens and closes according to an instruction from the control device is configured to sequentially open and close according to a preset program.

A rainfall system according to a fourth aspect is the rainfall system according to the first, second, or third aspect , wherein each valve of the nozzle unit that opens and closes according to an instruction from the control device is specified according to a preset program. It is configured to be opened only for a certain time.

A rainfall system according to a fifth aspect is the rainfall system according to the first, second, third, or fourth aspect , wherein the opening / closing degree of the valve is configured to be freely controllable by the control device, and furthermore, according to the opening / closing degree. The discharge flow rate of water from the nozzle is changed.

In the nozzle unit used in the rainfall system described in each of the above claims , an air cylinder is formed at an upper portion of the main body, and a nozzle mounting portion is formed at a lower portion of the main body. Is formed with a water supply passage communicating with the mounted nozzle, and further provided with an elastic member for urging the piston downward in the air cylinder, and a discharge port for air to the air cylinder pressing the piston upward. Further, the piston of the air cylinder is provided with a valve capable of closing the water supply passage with movement of the piston, and the water supply passage is normally closed by the bias of the elastic member. Is preferred.

In this case, an electromagnetic valve may be further provided in the air supply path to the supply port, and the electromagnetic valve may be opened and closed and the valve of the nozzle unit may be opened and closed according to an instruction from the control device .

[0016]

According to the rainfall system of the first aspect, since a valve capable of instantaneously opening and closing the water supply passage to the nozzle is provided in the vicinity of the nozzle for each nozzle unit, it is possible to respond to an instruction from the control device. It is possible to quickly open and close the valve in response to quickly start and stop rainfall. And one
Since two rainfall devices have two or more different diameter nozzles, it is possible to change the rainfall amount and the raindrop particle size by switching the nozzles to be discharged.

The rainfall system according to claim 2 is configured such that the selected nozzle unit is switched to another nozzle unit in the rainfall device during the program in the rainfall system according to claim 1 . In addition, it is possible to increase or decrease the amount of rainfall during rainfall.

In the rainfall system according to the third aspect , since each valve of the nozzle unit is configured to open and close sequentially, it is possible to shift the nozzle units for discharging water one after another to reproduce the rainfall. it can.

The rainfall system according to a fourth aspect of the present invention is the rainfall system according to the first, second, or third aspect, wherein the rainfall amount and the rainfall time can be caused to fall as set in advance. Furthermore, it becomes possible to change the amount of rainfall every time. Also, in the case of street rain, the time when the rain falls,
The speed can also be set.

A rainfall system according to a fifth aspect is the rainfall system according to the first, second, third, or fourth aspect , wherein the opening / closing degree of the valve is configured to be freely controllable by a control device, and furthermore, according to the opening / closing degree. Since the configuration is such that the discharge flow rate of water from the nozzle is changed, the amount of rainfall can be freely increased and decreased, and the range of the increase and decrease is large and can be selected continuously. It is also possible to change the raindrop particle size.

As described above, the rainfall system described above is used.
The configuration of the nozzle unit used for the
A cylinder and a nozzle
The nozzle mounting part is configured with a nozzle attached.
A water supply passage leading to the air cylinder is formed.
Is provided with an elastic member that biases the piston downward.
The air discharge port to the cylinder presses the piston upward.
And the piston of the air cylinder
Automatically closes the water supply channel with the movement of the piston.
Is provided and a normal valve is provided by the bias of the elastic member.
If the water supply channel is closed, the valve in the nozzle unit can be opened and closed by supplying and stopping air, and the opening and closing control of the valve becomes easy. In addition, instantaneous opening and closing can be realized, and the degree of opening and closing of the valve can be easily performed by the magnitude of the air supply pressure.

Further , as described above, the nozzle unit
A solenoid valve is provided in the air supply path to the
The solenoid valve opens and closes according to instructions from the control device.
If the valve of the nozzle unit is configured to open and close, the supply and stop of air is performed by the solenoid valve, so that the supply and stop of air, that is, the opening and closing response of the valve can be performed very quickly .

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 1 shows a front view of a rainfall apparatus 1 used in a rainfall system according to the present embodiment, and FIG. This rainfall device 1 has five rainfall nozzle units 2, 3, 4,
A casing 7 that supports the water supply pipes 5 and 6 and a casing 8 that is erected at the center of the casing 7 and has a flange 8a.
And a support tube 8 connected to the support tube. A flow path 8b through which water from the water supply pipe 9 flows is formed in the support pipe 8, and the flow path 8b
Communicates with the flow path 7a formed therein.

Each of the rain nozzle units 2, 3, 4,
Reference numerals 5 and 6 have the same structure, and the details of the structure will be described based on the rainfall nozzle unit 2 shown in FIG.
The upper part of the main body 21 of the rainfall nozzle unit 2 constitutes an air cylinder 25 in which a substantially cylindrical cylinder cover 22 having a closed upper end and a substantially cylindrical cylinder case 23 are integrated by a hexagon socket head bolt 24. doing. A nozzle mounting member 27 is fixed to a lower portion of the cylinder case 23 by a hexagon socket head bolt 26.

The nozzle mounting member 27 has a substantially cylindrical shape, and a lower portion thereof constitutes a nozzle mounting portion 27a having a thread groove formed on an inner periphery thereof. nozzles, for example nozzle N ₁ is screwed.
An opening 27 is provided on both sides of the center of the nozzle mounting portion 27a.
b and 27c are formed, respectively, and the flow path 27d in the nozzle mounting portion 27a communicates with the flow path 7a in the casing 7 through these openings 27b and 27c.

The nozzle mounting member 27 is fitted into a through hole formed in the casing 7 so that the flange 27e at the upper end thereof is engaged with the upper surface of the casing 7, and a fixing nut is attached to the lower end protruding portion. The screw 28 is fixed to the casing 7 by screwing. O-rings R ₁ and R ₂ are provided at the portions in contact with the inner walls of the through holes to ensure watertightness.

The piston 31 of the air cylinder 25 is
An annular notch 31a is formed at the outer peripheral edge of the upper surface, and the inside of the cylinder case 23 is locked until the notch 31a engages with the lower end of the cylinder cover 22 having an inner diameter smaller than the inner diameter of the cylinder case 23. The piston 31 slides up, and can slide down inside the cylinder case 23 until the lower end of the piston 31 engages with a step 23a formed in the cylinder case 23.

An annular notch 31a of the piston 31
A coil spring 32 serving as an elastic member is provided between the coil spring 32 and the cylinder cover 22. The urging of the coil spring 32 always pushes the piston 31 downward.

On the other hand, an air supply port 33 is formed in the lower side portion of the cylinder case 23. When air having a predetermined pressure or more is supplied from the air supply port 32, the air supply port 33 resists the urging of the coil spring 32. Then, the piston 31 is configured to be pushed up. An O-ring R ₃ is provided in the annular groove 31 b on the outer periphery of the piston 31 to ensure airtightness with the cylinder case 23.

At the center of the piston 31, a rod 34
And is integrated with the piston 31 by retaining rings 35 and 36. Further, a lower portion of the rod 34 slidably penetrates a bottom portion of the cylinder case 23 and a stem guide 37 fixed to an upper portion of the nozzle mounting member 27, respectively. A large-diameter portion 34a having an increased diameter is formed.
a is an NBR-lined valve on its surface, and is a valve 3 capable of closing a flow path 27d formed in the aforementioned nozzle mounting portion 27a.
8.

An appropriate number of annular grooves are formed in the outer periphery of the rod 34 in the vertical direction, and O-rings R ₄ ,
R ₅ and R ₆ are fitted to ensure air-tightness and water-tightness between the piston 31, the bottom of the cylinder case 23, and the stem guide 37, and also to an annular groove formed on the outer periphery of the stem guide 37, O ring R ₇ is fitted, airtightness between the nozzle mounting member 27, the water-tightness is ensured.

On the upper end wall of the cylinder cover 22,
A proximity sensor 39 is provided. This proximity sensor 39
Has a sensing portion 39a projecting into the cylinder cover 22 and facing the upper end of the rod 34.
When the upper end of the sensor approaches the sensing unit 39a more than the set distance, an appropriate signal, for example, a valve open signal is output.

The rainfall nozzle unit 2 has the above configuration, and the other rainfall nozzle units 3, 4, 5, and 6 have exactly the same configuration. Therefore, each of the nozzle mounting portions 2 in each of the rain nozzle units 2, 3, 4, 5, and 6
The channel 27d of the channel 7 is formed by the channel 7 formed in the casing 7.
It is configured to communicate by a. And, in each nozzle mounting portion 27 of the rainfall nozzle units 3, 4, 5, and 6,
Nozzles N2 _each having a different diameter from each other and from the nozzle N1 mounted on the nozzle mounting portion of the rainfall nozzle unit ₂ ;
N ₃ , N ₄ and N ₅ are mounted. In the present embodiment, for example, the size of the nozzle diameter is N ₁ > N ₂ > N ₃ > N ₄ > N ₅
It has become. The rainfall device 1 is configured as described above, and according to the rainfall device 1, 5 mm / Hr to 300 mm / Hr
It is possible to change the amount of rainfall within the range.

According to the rainfall apparatus 1 having the above-described configuration, for example, when air of a predetermined pressure is supplied from the air supply port 33 of the rainfall nozzle unit 2, the coil spring 32
The piston 31 is pushed up against the urging of the rod 34, and the rod 34 rises accordingly, and the valve 38 at the lower end of the rod 34 releases the closing of the flow path 27d in the nozzle mounting portion 27a. At that time, even if sudden pressure is applied to piston 3
Even if it is added to 1, the impact is absorbed by the coil spring 32, so that the safety of the device is also ensured.

[0035] When the closed state of the valve 38 in this way is released, which is the water supply water from the flow path 7a of the casing 7, is the discharged from the nozzle N ₁ through the channel 27d. In this case, since the distance to the flow path 7a and the discharge port of the nozzle N ₁ in the casing 7 in the filling of water state is extremely short, the response is rapid, increase in the piston 31, i.e. immediately nozzles N ₁ by the supply of air The water is discharged from.
Therefore, it does not drop at the beginning of the descent. In the case of stopping rainfall, if the supply of air is stopped, the piston 31 is immediately pushed down by the urging of the coil spring 32, whereby the valve 38 immediately closes the flow path 27d in the nozzle mounting portion 27a. , but does not lose button from the nozzle N ₁ even when the end down.

Further, in the rainfall device 1, the proximity sensor 39 is provided on the cylinder cover 22 of each rainfall nozzle unit, and can detect the opening and closing of the valve 38 and output the signal to the outside. In addition, the state of each unit of the rainfall device 1 in the rainfall system can be easily grasped and controlled.

In addition, the rainfall apparatus 1 has a structure in which the degree of pushing up of the piston 31 can be changed according to the magnitude of the air supply pressure to adjust the opening of the valve 38, so that the air supply pressure is appropriately adjusted. Accordingly, the discharge flow rate, that is, the amount of rainfall in the unit itself can be changed to some extent, and accordingly, the particle size of raindrops can be changed to some extent. Therefore, various rainfall conditions can be created.

Next, a rainfall system using the rainfall device 1 will be described. FIG. 4 schematically shows a piping system and a control system of the entire rainfall system 51 according to the present embodiment. Water used for rainfall is supplied from a water tank 52 to a plurality of pumps 5.
Water is taken by 3, 54, 55. The number of pumps is controlled by setting the outlet flow rates of these pumps 53, 54, 55. In FIG. 4, a relief valve provided as necessary, an inverter for controlling the discharge pressure of the pump, a priming device, a pressure bypass, a pressure regulator, a flow meter, a peripheral device such as a timer, and gradually when starting the pump. The illustration of various valves such as a pneumatic butterfly valve for preventing water hammer that opens to the air, a pressure bypass valve, an appropriate shut-off valve, a pressure control valve, and a drain valve is omitted.

The water taken by the pumps 53, 54, 55 is passed through two control valves 56, 57 provided in parallel to improve the control accuracy.
Are provided at a rainfall position (predetermined height) in accordance with a predetermined arrangement, for example, water is supplied to a ceiling of an experimental facility, where the water is appropriately branched, for example, before water is supplied to each rainfall device 1 individually. Water is supplied to the delivery / supply pipe 9. In the present embodiment, as shown in FIG. 5, 34 rows (17 × 2), 1 vertical
The pipes are provided so as to supply water to each of the rainfall devices 1 arranged in six rows.

Air from the air supply device 61 is supplied to the air supply ports 33 of the air cylinders 25 of the rain nozzle units 2, 3, 4, 5, and 6 in the rain devices 1 arranged as described above. It is configured to be. Electromagnetic valves 62, 63, 64, 65, and 66 are provided in the air supply paths for each of the rain nozzle units 2, 3, 4, 5, and 6, respectively. Therefore, each of these solenoid valves 62, 63, 6
By the opening and closing of 4, 65, 66, the supply and stop of air to each rain nozzle unit 2, 3, 4, 5, 6 in each rain device 1 are performed, and each rain nozzle unit 2, 3, 4, 5, , 6 are opened and closed.

Next, the control system of the rainfall system 51 will be described. The pumps 51, 52, 53, control valves 56, 57, air supply device 61, and each rainfall device 1
The electromagnetic valves 62, 63, 64, 65, 6 for supplying air to the rain nozzle units 2, 3, 4, 5, 6
6 is controlled by the sequence controller 71. Further, the sequence controller 71
Instructions of a personal computer 72 for simulation and a personal computer 73 for operation and monitoring;
Operated and controlled by a program.

The rainfall system 51 according to the present embodiment has the above-described main configuration. Next, an example of a rainfall experiment process using the rainfall system 51 will be described. The computer 72 is activated, and the position of the rainfall device is displayed on the screen as shown in FIG.

Next, a rain target area (rain area) is set on the screen. At this time, as shown in FIG. 6, for example, as shown in (Example 1) and (Example 2), the target area may be set by enclosing the target area with a box or the like using a mouse or the like.

Thereafter, the personal computer 72 for setting and simulation is operated according to the flowchart shown in FIG. That is, first, the rainfall type is set.
For example, in the rainfall target area set as described above, it is determined whether to make the rainfall constant or to make it rain, and further, the particle size (one particle size, two particle sizes) is selected.

Next, the amount of rainfall (mm / Hr) is set. By the above operation, in the personal computer 72 for setting / simulation, the selection of the rainfall nozzle unit in the rainfall device 1 and the number of the rainfall devices 1 to be operated (the number of nozzles) ) Is performed, and a solenoid valve to be opened is selected based on the specified rainfall type and the set value of the rainfall amount and the number of selected rainfall devices. When identifying the solenoid valve, a management number may be assigned to the solenoid valve corresponding to each rain nozzle unit of each rain device 1 in advance.

Next, a rainfall time (schedule time) is set. That is, in the case of constant rainfall, a schedule time for performing a constant rainfall experiment is set in advance, and in the case of variable rainfall,
The schedule time for performing the variable rainfall experiment and the rainy unit time (time for shifting the rainfall device (nozzle) line by one line) are set in advance. As a result, the registration process of the schedule group is performed inside the personal computer 72 for setting / simulation, and a group is formed for each nozzle opening time of each system by setting the rainfall time, and the management number is registered. .

After performing the above settings, once
On the simulation personal computer 72, a simulation of the contents of an experiment, such as rain, is performed. Therefore, if it is NG, the operation is restarted from the setting of the rainfall target area (rain area) described above. If the simulation is OK, a rainfall pattern is registered.

Next, an experiment is prepared and an experiment is carried out by the personal computer 73 for operation and monitoring. At the start of the season, an air bleed valve and a pump start / stop command of each system are manually performed. Next, preparation for starting the experiment is started, and as shown in the flowchart shown in FIG. 8, first, the rainfall pattern registered by the personal computer 72 for setting and simulation is called.
Next, the air bleed valve for bleeding the system used in the experiment is manually selected, and then the pump is manually started.

Then, the initial water supply pressure is set, pressure control is started, and the time at which the experiment is started is set. That is, a start schedule is set. Preparation is completed as described above, and when the set start time comes, a predetermined rainfall experiment is started according to the registered rainfall pattern. During the experiment, on the operation / monitoring personal computer 73, necessary states and measured values such as pumps, various valves, flow rates, pressures, and the like are displayed on a screen, whereby the experimental state can be monitored.

As described above, according to the rainfall system 51 according to the present embodiment, the preparation of the desired rainfall experiment, the setting of the rainfall pattern, and the personal computer 72 for setting / simulation and the personal computer 73 for operation / monitoring are performed. Can easily be performed. Moreover, with respect to the rainfall pattern itself, by adopting the rainfall apparatus 1 having the above-described configuration, the rainfall area, the rainfall area, and the average raindrop diameter can be arbitrarily selected, and various rainfall patterns such as passing rain can be selected. Can be reproduced.

The rainfall nozzle units 2, 3, 4, 5, and 6 used in the rainfall apparatus 1 are opened and closed by the solenoid valves 62, 63, 64, 65, and 66 having good responsiveness.
Opening and closing of the nozzles N ₁ to N ₅ valve 38 close to is performed instantaneously, the discharge from the nozzle, stops very instantaneously (within 2 seconds)
, So that the impact of the expected rainfall test can be accurately determined without dropping.

[0052]

According to the rainfall system of the present invention, since a valve capable of instantaneously opening and closing the water supply passage to the nozzle is provided in the vicinity of the nozzle for each nozzle unit, there is no dripping.
It is possible to open and close the valve quickly in response to an instruction from the control device, thereby realizing quick start and stop of rainfall. In addition, operation with an arithmetic processing device such as a personal computer can be supported. And switch the nozzle to discharge
It is also possible to change the amount of rainfall and change the size of raindrops.
is there. In addition, arithmetic processing devices such as personal computers
Can be easily handled.

[0053]

In the rainfall system according to the second aspect , it is possible to further increase or decrease the amount of rainfall during rainfall. In the rainfall system according to the third aspect , it is possible to additionally reproduce rainfall. In the rainfall system according to the fourth aspect , the rainfall amount and the rainfall time can be made to rain as set in advance, or the rainfall amount can be changed every time. In the case of street rain, the time when rain falls
The speed can also be set. And the rainfall system according to claim 5.
With the stem, it is possible to freely increase and decrease the amount of rainfall, and yet
The range of the increase or decrease is large and can be selected continuously.

[0055]

[0056]

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a rainfall device used in a rainfall system according to an embodiment of the present invention.

FIG. 2 is an explanatory plan view of the rainfall device of FIG. 1;

FIG. 3 is a front sectional view when a valve of a rain nozzle unit used in the rain apparatus of FIG. 1 is in a closed state.

FIG. 4 is an explanatory diagram showing a main system of the rainfall system according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an arrangement state of a rainfall device (nozzle) displayed on a screen of a personal computer for setting and simulation in the rainfall system according to the embodiment of the present invention.

6 is a rainfall device (nozzle) displayed on the screen of FIG.
FIG. 5 is an explanatory diagram showing a state in which a rainfall target area is set.

FIG. 7 is a flowchart showing an operation procedure of a personal computer for setting and simulation in the rainfall system according to the embodiment of the present invention.

FIG. 8 is a flowchart showing an operation procedure of a personal computer for operation and monitoring in the rainfall system according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram of a rainfall test facility according to the related art.

[Explanation of symbols]

Reference Signs List 1 rainfall device 2, 3, 4, 5, 6 rainfall nozzle unit 25 air cylinder 38 valve 51 rainfall system 52 water tank 53, 54, 55 pump 61 air supply device 62, 63, 64, 65, 66 solenoid valve 71 sequence controller 72 personal computer N ₁ to N ₅ nozzle for personal computer 73 operations and monitoring for setting simulation

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Joji Tsuda 5-6-15 Namiki, Abiko-shi, Chiba Pref. Parcot Abiko 508 (56) References 46859 (JP, Y2)

Claims (5)

(57) [Claims] 1. A large number of rainfall devices arranged at a rainfall position
When, a piping system for supplying water to each of these rain devices, each
The rainfall device has a plurality of nozzle units, is a rainfall system for creating a rainfall state by discharging water from the piping system from the nozzle of the nozzle unit, in each of the rainfall device, different diameter Nozzle
At least two or more nozzle units are provided,
Further, in each of the rainfall devices, each of the above
The flow path leading to the nozzle mounting part of the
A valve that can open and close the water supply passage to each nozzle instantly
Each of the nozzle units is provided in the vicinity of the nozzle and further provided with a control device for controlling the opening and closing of the valve. According to a preset program , each valve of the selected nozzle unit in each rainfall device in the designated area is provided.
Is configured to open and close according to an instruction from the control device. 2. The program according to claim 1, wherein the selected nozzle unit is a program unit.
On the way to another nozzle unit in the rainfall device
2. The apparatus according to claim 1, wherein the apparatus is configured to be replaced.
A rainfall system according to item 1. 3. A nozzle that opens and closes according to an instruction from a control device.
Each valve of the unit follows a preset program.
Characterized by being configured to open and close sequentially
The rainfall system according to claim 1 . 4. Each valve of a nozzle unit that opens and closes according to an instruction from a control device is configured to open for a designated time according to a preset program.
The rainfall system according to claim 1, 2, or 3, wherein: 5. The degree of opening and closing of the valve is freely controllable by a control device.
And water from the nozzle according to the degree of opening and closing.
Characterized in that the discharge flow rate is changed.
The rainfall system according to claim 1, 2, 3, or 4 .